阅读说明：本技术 一种应用于髌骨修复手术的医疗器械 (Medical instrument applied to patella repair operation ) 是由 不公告发明人 于 2020-06-10 设计创作，主要内容包括：本发明公开一种应用于髌骨修复手术的医疗器械,包括位姿调整机构、连接机构、双线头收紧机构、单线头收紧机构,位姿调整机构可通过连接机构实现与双线头收紧机构和单线头收紧机构的快速连接和解脱,即位姿调整机构与连接机构之间采用模块化连接结构,位姿调整机构用于实现双线头收紧机构和单线头收紧机构的位置和姿态调整,双线头收紧机构、单线头收紧机构与连接机构之间亦采用模块化连接结构,亦均可实现快速连接和解脱,双线头收紧机构可对双线头引出的钢丝线和两根单线头引出的钢丝线进行收紧,单线头收紧机构可对一根单线头引出的钢丝线进行收紧。(The invention discloses a medical instrument applied to patella repair surgery, which comprises a pose adjusting mechanism, a connecting mechanism, a double-wire-head tightening mechanism and a single-wire-head tightening mechanism, wherein the pose adjusting mechanism can be quickly connected with and disconnected from the double-wire-head tightening mechanism and the single-wire-head tightening mechanism through the connecting mechanism, namely, a modularized connecting structure is adopted between the pose adjusting mechanism and the connecting mechanism, the pose adjusting mechanism is used for realizing the position and posture adjustment of the double-wire-head tightening mechanism and the single-wire-head tightening mechanism, the modularized connecting structures are also adopted between the double-wire-head tightening mechanism and the single-wire-head tightening mechanism and the connecting mechanism, the fast connection and the disconnection can be realized, the double-wire-head tightening mechanism can tighten the steel wire led out by the double wire heads and the steel wire led out by the two single wire heads, and the single-wire-head tightening mechanism can tighten the steel wire led out by one single wire head.)

1. The utility model provides a be applied to medical instrument of patella restoration operation, includes position appearance guiding mechanism (1), coupling mechanism (2), two first tightening mechanism (3), single line head tightening mechanism (4), its characterized in that: the pose adjusting mechanism (1) can be quickly connected and disconnected with the connecting mechanism (2), a modular connecting structure is also adopted between the double-wire-head tightening mechanism (3) and the single-wire-head tightening mechanism (4) and the connecting mechanism (2) to realize quick connection and disconnection, the pose adjusting mechanism (1) is used for realizing position and posture adjustment of the double-wire-head tightening mechanism (3) and the single-wire-head tightening mechanism (4), the double-wire-head tightening mechanism (3) and the single-wire-head tightening mechanism (4) can always keep required positions and postures in work, the double-wire-head tightening mechanism (3) can tighten steel wires led out by double wires and steel wires led out by two single wires, and the single-wire-head tightening mechanism (4) can tighten the steel wires led out by one single wire head.

2. The medical instrument applied to the patellar repair surgery according to claim 1, wherein: the pose adjusting mechanism (1) comprises a lifting inner arm (101), a lifting outer arm (102), a first hand wheel (103), a gear shift lever (104), a second hand wheel (105), a transverse moving outer arm (106), a transverse moving inner arm (107), a pin shaft (108), a swing rotating frame (109), an insertion plate (110), a fourth hand wheel (111), a third hand wheel (112), a lifting screw rod (113), a transverse moving screw rod (114), a second worm wheel (115), a fastening plate (116), a sliding plate (117), a first spring (118), a gear shift plate (119), a transverse moving bevel gear (120), a turntable bearing (121) and a first worm wheel (122), wherein the lifting inner arm (101) is fixed on the side of an operating bed, the lifting outer arm (102) and the lifting inner arm (101) can form a moving pair, and the lifting outer arm (102) can move in the vertical direction by turning the second hand wheel (105) after the gear shift lever (104) is pulled upwards, in order to enable the supported medical apparatus to swing in the horizontal direction, a transverse moving outer arm (106) and a lifting outer arm (102) form a rotating pair, a first hand wheel (103) drives the transverse moving outer arm (106) to swing, in order to enable the supported medical apparatus to move in the horizontal direction, a transverse moving inner arm (107) and the transverse moving outer arm (106) form a moving pair, the transverse moving inner arm (107) moves in the horizontal direction by rotating a second hand wheel (105) after downwards pulling a gear shifting rod (104), in order to enable the supported medical apparatus to rotate around a vertical shaft, a swing rotating frame (109) and the transverse moving inner arm (107) form a rotating pair, a third hand wheel (112) drives the swing rotating frame (109) to rotate around the vertical shaft, in order to enable the supported medical apparatus to rotate around a horizontal shaft, a plug plate (110) and the swing frame (109) form a rotating pair, and the fourth hand wheel (111) drives the plugboard (110) to rotate around the horizontal shaft.

3. The medical instrument applied to the patellar repair surgery according to claim 2, wherein: the lifting inner arm (101) is of a hollow square columnar structure, connecting lugs (101.1) are arranged on two sides of the lower end of the lifting inner arm, the lifting inner arm (101) can be tightly installed on the side face of an operating table through the connecting lugs (101.1) through screws to provide stable support for the posture adjusting mechanism (1), a threaded hole is formed in the center of the upper end of the lifting inner arm (101), the lifting inner arm (101) is nested and installed inside the lifting outer arm (102) and forms a moving pair, a turntable bearing (121) is arranged between the top end of the lifting outer arm (102) and the lower side of a fastening plate (116), the lifting outer arm (102) and the fastening plate (116) form a rotating pair, a first worm wheel (122) is fixedly installed at the center of the lower side of the fastening plate (116) through screws, the front end of the first hand wheel (103) is of a hand wheel structure and can be operated by hand and conveniently rotated, the rear end of the first hand wheel (103) is of a worm structure, the first hand wheel (103), the first hand wheel (103) and the lifting outer arm (102) form a rotation pair, a worm structure at the rear end of the first hand wheel (103) and a first worm wheel (122) form a worm and gear meshing relationship, an external spline is arranged at the top end of the lifting screw rod (113), inclined planes are arranged at the top ends of all convex teeth of the external spline, the lifting screw rod (113) is arranged at the inner center of the lifting outer arm (102), axial positioning is realized through a spring retainer ring for a shaft, screw rod threads are arranged at the lower half section of the lifting screw rod (113), and the screw rod threads are matched with threaded holes at the upper end of the lifting inner arm (101) to form a thread pair;

the second hand wheel (105) is arranged on the upper side of the left end of the transverse moving outer arm (106) and is coaxial with the lifting screw rod (113), the upper end of the second hand wheel (105) is of a hand wheel structure and can be operated by hands and is convenient to rotate, the lower half part of the second hand wheel is of an external spline structure, the lowest end of the transverse moving bevel gear (120) is provided with a baffle plate through a screw, the upper end of the transverse moving bevel gear (120) is of a bevel gear structure, the lower end of the transverse moving bevel gear is provided with an internal spline structure, the lower ends of all convex teeth of the internal splines are provided with inclined planes, the center of the transverse moving bevel gear (120) is also provided with an internal spline, the transverse moving bevel gear (120) and the second hand wheel (105) are coaxially arranged, the internal spline at the center of the transverse moving bevel gear (120) and the external spline at the lower half part of the second hand wheel (105) form a spline meshing relationship, namely, the transverse, the right end of the shifting baffle (119) is mounted in the middle of the transverse bevel gear (120) and forms a revolute pair, a rectangular cavity and two parallel through hole chutes are formed in the left end of the shifting baffle (119), a sliding plate (117) is mounted in the rectangular cavity in the left end of the shifting baffle (119) and can slide in the two parallel through hole chutes, a first spring (118) is arranged between the sliding plate (117) and the right end of the rectangular cavity, a cross rod is arranged at the left end of the shift lever (104) and is convenient to pull up and down manually for shifting, the middle of the shift lever and the left end of the transverse outer arm (106) form a revolute pair, and the right end of the shift lever (104) and the two ends of the side face of the sliding plate;

the transverse moving inner arm (107) is of a hollow square columnar structure, a threaded hole is formed in the left end of the transverse moving inner arm, the transverse moving inner arm (107) is nested in the transverse moving outer arm (106) and forms a moving pair, the transverse moving screw rod (114) is installed in the transverse moving outer arm (106) and forms a rotating pair, axial positioning of the transverse moving screw rod (114) is realized through a single elastic ring for a shaft, a bevel gear is arranged at the left end of the transverse moving screw rod (114), screw threads are formed in the right half part of the transverse moving screw rod, and the screw threads are matched with threaded holes in the left end of the transverse moving inner arm (107) to form a thread;

after a cross bar at the left end of the shift lever (104) is pulled upwards, an internal spline at the lower end of the transverse bevel gear (120) can be meshed with an external spline at the top end of the lifting screw rod (113), and the state is kept under the action of the elastic force of the first spring (118), and the second hand wheel (105) is rotated to drive the lifting screw rod (113) to rotate through the transverse bevel gear (120), so that the lifting outer arm (102) is lifted and lowered; after a cross rod at the left end of a gear shifting rod (104) is pulled downwards, a bevel gear structure at the upper end of a transverse bevel gear (120) can be meshed with a bevel gear at the left end of a transverse screw rod (114), the state is kept under the action of the elastic force of a first spring (118), and a second hand wheel (105) is rotated to drive the transverse screw rod (114) to rotate through the transverse bevel gear (120), so that the transverse inner arm (107) can stretch and move left and right.

4. The medical instrument applied to the patellar repair surgery according to claim 2, wherein: the left end of the pin shaft (108) is fixedly connected with the left end of the swing frame (109) through a screw, the transverse inner arm (107) and the swing frame (109) form a rotation pair through the pin shaft (108), the second worm wheel (115) is coaxially installed with the pin shaft (108) and is fixedly connected with the pin shaft (108) through a key connection, the third hand wheel (112) is installed at the position, close to the right end, of the transverse inner arm (107) and forms the rotation pair, the front end of the third hand wheel (112) is of a hand wheel structure and can be operated by hands and is convenient to rotate, the rear end of the third hand wheel (112) is of a worm structure, the worm structure is meshed with the second worm wheel (115) to form a worm and gear meshing relationship, the right end of the swing frame (109) and the rear end of the insertion plate (110) form the rotation pair, the left end of the insertion plate (110) is provided with the worm wheel structure, the fourth hand wheel (111) is installed on the upper side of the right end of the, the hand-operated and convenient-to-rotate hand-operated four-wheel type window inserting device is characterized in that the rear end of the fourth hand wheel (111) is of a worm structure, the worm structure is meshed with a worm gear structure at the left end of the inserting plate (110) to form a worm and gear meshing relation, a flat plate structure is arranged at the right end of the inserting plate (110), four inserting columns (110.1) are arranged on the upper side of the flat plate, an inclined plane is arranged at the top end of each inserting column (110.1), a hook is arranged at the middle position of each inserting column, and a rectangular window is formed in the inserting.

5. The medical instrument applied to the patellar repair surgery according to claim 1, wherein: the connecting mechanism (2) comprises a main body frame (201), a bottom plate (202), a clamping plate (203), a set screw (204), a button (205), a second spring (206), a third spring (207) and a hook (208), wherein a rectangular groove is arranged on the upper side of the front end of the main body frame (201), two rectangular jacks (201.1) are arranged at the front end of the rectangular groove, a vertically through round hole is arranged at the position close to the middle of the rectangular groove, a hook cavity and a button hole in the vertical direction are arranged in the rear end of the main body frame (201), the hook (208) is arranged in the hook cavity and can slide back and forth in the hook cavity, an inclined plane structure is arranged at the front end of the hook (208), a rectangular opening is arranged at the middle position, an inclined plane is arranged at the rear side of the button (205), the button (205) passes through the rectangular opening in the middle of the hook (208) and is arranged in the button hole of the main body frame (201), two set screws (204) are respectively arranged in the two threaded holes, two third springs (207) are respectively arranged between the two set screws (204) and the hook (208), the lower side surface of the main body frame (201) is provided with a clamping plate cavity, the clamping plate (203) is arranged in the clamping plate cavity, and can move back and forth in the clamping plate cavity, four horseshoe-shaped openings are arranged on the clamping plate, a pressing plate is arranged at the rear end of the clamping plate (203), a rectangular opening is arranged at the middle position, a second spring (206) is arranged between the front position of the clamping plate (203) and the main body frame (201), four round holes for inserting the plug-in posts (110.1) are arranged on the bottom plate (202), the bottom plate (202) is arranged at the lower side of the main body frame (201), the bottom plate (202) and the rectangular groove middle round hole of the main body frame (201) are coaxially provided with a through round hole;

in an initial state, under the action of the elastic force of a third spring (207), the hook (208) is positioned at the front end of the hook cavity, the inclined plane structure at the front end of the hook (208) extends into the rectangular groove on the upper side of the front end of the main body frame (201), the button (205) is pressed downwards, the inclined plane at the rear side pushes the hook (208) to move backwards, and the inclined plane structure at the front end of the hook (208) retracts into the hook cavity; after the press of the button (205) is released, the hook (208) is restored to the initial position under the action of the elastic force of the third spring (207);

under the action of the elasticity of the second spring (206), the clamping plate (203) is positioned at the rear end position of the clamping plate cavity, four plug-in columns (110.1) arranged on the plug-in plate (110) are inserted into four round holes arranged on the bottom plate (202), under the action of the inclined planes at the top ends of the plug-in columns (110.1) and the second spring (206), the clamping plate (203) slides forwards and rebounds backwards, and the linear edges of four horseshoe-shaped openings on the clamping plate (203) are clamped into hooks at the middle positions of the four plug-in columns (110.1), so that the quick connection of the connecting mechanism (2) and the pose adjusting mechanism (1) is realized; the pressing plate at the rear end of the clamping plate (203) is pressed to enable the pressing plate (203) to move forwards, and after the straight edges of the four horseshoe-shaped holes are separated from the hooks at the middle positions of the four inserting columns (110.1), the connecting mechanism (2) is taken away upwards, so that the connecting mechanism (2) and the pose adjusting mechanism (1) can be quickly disengaged;

the set screw (204) and the main body frame (201) form a thread pair connection, and the pressing and rebounding force of the button (205) can be adjusted by adjusting the pre-tightening elastic force of the third spring (207).

6. The medical instrument applied to the patellar repair surgery according to claim 1, wherein: the double-wire-head tightening mechanism (3) comprises a double-wire-head rack (301), a fifth hand wheel (302), a first wrench (303), a first winding drum (304), a first locking knob (305), a left guide wheel (306), a left connecting rod (307), a sliding groove component (308), a screw rod (309), a left connecting rod (310), a left long rod (311), a left second guide wheel (312), a left three guide wheel (313), a right three guide wheel (314), a right second guide wheel (315), a right long rod (316), a right second connecting rod (317), a right connecting rod (318), a right guide wheel (319), a second locking knob (320), a second winding drum (321), a second wrench (322), a first bevel gear set (323), a right end cover (324), a second worm gear set (325), a first planetary bevel gear set (326), a left end cover (327), a second bevel gear set (328), a second planetary bevel gear set (329), a left connecting rod (307), a first locking knob (307), a, A left second connecting rod (310), a left long rod (311) is arranged at the left front end of the double-thread-head rack (301), the four form a trapezoid, a right connecting rod (318), a right second connecting rod (317), a right long rod (316) is arranged at the right front end of the double-thread-head rack (301), the four form a trapezoid, a chute piece (308) and a screw (309) are arranged at the middle position of the front end of the double-thread-head rack (301) and used for adjusting the opening positions of the left long rod (311) and the right long rod (316), a first wrench (303), a first winding drum (304), a first locking knob (305) is arranged at the left side of the double-thread-head rack (301) and used for tightening a left thread head (6.1) or a first steel wire, a second locking knob (320), a second winding drum (321), a second wrench (322) is arranged at the right side of the double-thread-head rack (301) and used for tightening a right thread head (6.2) or a second steel wire, and a fifth hand wheel (302) is formed by a first hand, The transmission structure consisting of the right end cover (324), the second worm gear (325), the first planetary bevel gear (326), the left end cover (327), the second bevel gear set (328) and the second planetary bevel gear (329) drives the first winding drum (304) and the second winding drum (321) to rotate, so that the steel wire led out by the double wire heads or the steel wire led out by the two single wire heads is tightened and loosened.

7. The medical instrument applied to the patellar repair surgery according to claim 6, wherein: two extending arms are respectively arranged at two sides of the front end of the double-line head rack (301), the rear end of the double-line head rack (301) is of a double-layer structure formed by an upper plate and a lower plate, a threaded hole is arranged in the middle of the upper plate of the double-line head rack (301), the lower plate is of a rectangular structure with the same size as the rectangular groove on the upper side of the front end of the main body rack (201), two inserting plates (301.1) are arranged at the front end of the lower plate, coaxial and through round holes are formed in the rear ends of the upper plate and the lower plate, a hand wheel structure is arranged at the upper end of a fifth hand wheel (302) and can be operated by hands and is convenient to rotate, a worm structure is arranged in the middle of the fifth hand wheel (302), an internal spline is arranged at the lower end of the lower plate, the fifth hand wheel (302) is arranged in the round holes in the rear ends of the upper plate and the lower plate of the double-line head rack (301), the upper plate and the lower plate form a, the bevel gear set and the left end cover are respectively in a rotating pair with the second worm gear (325), the right end cover (324) is in fastening connection with the right end of the second worm gear (325) through a screw, the left end cover (327) is in fastening connection with the left end of the second worm gear (325) through a screw, the first bevel gear set (323) and the right end cover (324) form a rotating pair, both ends of the first bevel gear set (323) are respectively provided with a bevel gear structure, the bevel gear structure at the left end is simultaneously meshed with the first planetary bevel gear (326) and the second planetary bevel gear (329), the second bevel gear set (328) and the left end cover (327) form a rotating pair, both ends of the second bevel gear set (328) are respectively provided with a bevel gear structure, and the bevel gear structure at the right end is simultaneously meshed with the first planetary bevel gear (;

the side surface of the cylinder of the first winding drum (304) is internally provided with a variable diameter groove, which can lead the left thread end (6.1) to be excessively smooth and smooth, the width of the variable diameter groove can only accommodate the penetration of a single steel wire, a first wrench (303) is arranged at a position close to the bottom end of the variable-diameter groove, an eccentric wheel structure is arranged at the lower end of the first wrench (303), a left thread end (6.1) penetrates through the variable-diameter groove and passes through a gap between the eccentric wheel and the variable-diameter groove, the first wrench (303) is pulled anticlockwise, the eccentric wheel structure can be tightly pressed on the left thread end (6.1), a threaded hole is arranged in the first winding drum (304), the first locking knob (305) and the threaded hole form a thread pair, the first winding drum (304) is arranged on the left side of the double-thread-end rack (301), the first winding drum and the double-thread-end rack form a rotating pair, the lower end of the first winding drum (304) is provided with a bevel gear structure, the bevel gear structure is meshed with a bevel gear structure at the left end of a second bevel gear set (328); the cylindrical side surface of the second winding drum (321) is internally provided with a variable diameter groove, so that the right thread end (6.2) penetrating into the groove is excessively smooth, the width of the variable diameter groove can only accommodate the penetration of a single steel wire, a second spanner (322) is arranged at the position close to the bottom end of the variable diameter groove, an eccentric wheel structure is arranged at the lower end of the second spanner (322), the second spanner (322) is pulled clockwise after a right thread end (6.2) penetrates through the variable diameter groove and passes through a gap between the eccentric wheel and the variable diameter groove, the eccentric wheel structure can be tightly pressed on the right thread end (6.2), a threaded hole is arranged in the second winding drum (321), the threaded hole of the second locking knob (320) forms a thread pair, the second winding drum (321) is arranged on the right side of the double-thread-end rack (301) and forms a rotating pair, the lower end of the second winding drum (321) is provided with a bevel gear structure, the bevel gear structure is meshed with a bevel gear structure at the right end of the first bevel gear set (323).

8. The medical instrument applied to the patellar repair surgery according to claim 6, wherein: the front end of the screw rod (309) is provided with a manually rotatable disc structure, the rear end of the screw rod is of a thread structure, the thread structure is matched with a threaded hole in the middle of the upper plate of the double-thread-end rack (301) to form a thread pair, the middle of the sliding groove piece (308) is provided with a round hole, the left side and the right side of the sliding groove piece are provided with a long-strip hole, the screw rod (309) is arranged in the round hole in the middle of the sliding groove piece (308), and the screw rod (309) and the round hole form a rotating;

one end of a left connecting rod (307) and a projecting arm on the left side of the double-thread-head rack (301) form a rotating pair, the other end and the rear end of a left long rod (311) form a rotating pair, one end of a left two connecting rod (310) and the projecting arm on the left side of the double-thread-head rack (301) form a rotating pair, the other end and the middle position of the left long rod (311) form a rotating pair, a left two guide wheel (312) and a left three guide wheel (313) are arranged at the front end of the left long rod (311), a left guide wheel (306) is arranged at the rear end of the left long rod (311), a projecting shaft which extends downwards is arranged at the rear end of the left long rod (311) and can slide in a long opening on;

the right connecting rod (318) one end constitutes the revolute pair with the cantilever on double thread end frame (301) right side, the other end constitutes the revolute pair with right stock (316) rear end, two right connecting rod (317) one end constitutes the revolute pair with the cantilever on double thread end frame (301) right side, the other end constitutes the revolute pair with right stock (316) intermediate position, right stock (316) front end is equipped with two right guide wheels (315) and three right guide wheels (314), right stock (316) rear end is equipped with a right guide wheel (319), and right stock (316) rear end is equipped with a protrusion axle that stretches out downwards, this protrusion axle can slide in the rectangular trompil on chute spare (308) right side.

9. The medical instrument applied to the patellar repair surgery according to claim 6, wherein: the length of the left connecting rod (307) and the right connecting rod (318) is 40mm, the length of the left connecting rod (310) and the right connecting rod (317) is 35mm, the distance between the left end axle center of the left connecting rod (307) and the left end axle center of the left connecting rod (310) is 45mm, the distance between the right end axle center of the left connecting rod (307) and the right end axle center of the left connecting rod (310) is 50mm, the distance between the right end axle center of the right connecting rod (318) and the right end axle center of the right connecting rod (317) is 45mm, the distance between the left end axle center of the right connecting rod (318) and the left end axle center of the right connecting rod (317) is 50mm, and unequal sides formed by the parts can enable the left three guide wheels (313) and the right three guide wheels (314) to have a larger distance adjusting range;

in the initial state, the screw (309) retracts into a threaded hole in the middle of the upper plate of the double-thread-head rack (301), the left three guide wheel (313) and the right three guide wheel (314) are closest to each other, when the screw (309) is screwed out of the threaded hole, the sliding chute piece (308) moves forwards, so that the left long rod (311) and the right long rod (316) move forwards, and in the process, due to the action of a quadrangle with a specific side length formed by the left extending arm, the left connecting rod (307), the left two connecting rods (310), the left long rod (311), the right extending arm, the right connecting rod (318), the right two connecting rods (317) and the right long rod (316) of the double-thread-head rack (301), the front ends of the left long rod (311) and the right long rod (316) are opened, so that the left three guide wheel (313) and the right three guide wheel (314) can be adjusted to the distance required by the operation; after the screw (309) is screwed into the threaded bore, the components return to the initial state.

10. The medical instrument applied to the patellar repair surgery according to claim 1, wherein: the single-thread-head tightening mechanism (4) comprises a single-thread-head rack (401), a sixth hand wheel (402), a third winding drum (403), a third wrench (404) and a worm gear group (405), wherein a lead hole is formed in the front end of the single-thread-head rack (401), the rear end of the single-thread-head rack is of a double-layer structure formed by an upper plate and a lower plate, the lower plate is of a rectangular structure with the same size as the rectangular groove on the upper side of the front end of the main body rack (201), two inserting plates are arranged at the front end of the lower plate, coaxial and through round holes are formed in the rear ends of the upper plate and the lower plate, the upper end of the sixth hand wheel (402) is of a hand wheel structure and can be operated by hand and conveniently rotated, a worm structure is arranged in the middle of the lower end of the sixth hand wheel (402), an inner spline is arranged in the round holes in the rear ends of the upper plate and the lower plate at the rear end of the single-thread-head rack (, the right end of the worm wheel structure is meshed with a worm structure in the middle of the sixth hand wheel (402);

be provided with a variable diameter recess in third reel (403) cylinder side, can make single wire head steel wire (5) excessively slick and sly that penetrate wherein, variable diameter recess width can only hold single steel wire and penetrate, install third spanner (404) in the position that is close to variable diameter recess bottom, third spanner (404) lower extreme is equipped with the eccentric wheel structure, single wire head steel wire (5) penetrate variable diameter recess and pass through behind the gap between eccentric wheel and the variable diameter recess, clockwise wrench (404), can make the eccentric wheel structure compress tightly single wire head steel wire (5), third reel (403) are installed in single wire head frame (401) right side, both constitute the revolute pair, third reel (403) lower extreme is equipped with the bevel gear structure, this bevel gear structure meshes with the bevel gear structure of worm wheel set (405) left end.

Technical Field

The invention relates to the technical field of medical instruments, in particular to a medical instrument applied to patella repair surgery.

Background

The kneecap is positioned in front of the knee joint, is the largest seed bone in a human body and is embedded in the quadriceps femoris tendon, is a triangular flat bone and participates in the formation of the knee joint, and the kneecap has the main functions of protecting the knee joint, avoiding the friction of the quadriceps femoris tendon on the cartilage surface of the condyle of the femur, transmitting the strength of the quadriceps femoris muscle and participating in the formation of a knee stretching device; also has the functions of maintaining the stability of the knee joint in the semi-squatting position, preventing the excessive adduction, abduction and flexion of the knee joint, having the function of a bicycle chain and increasing the rotation capacity of the knee joint.

Patellar fracture is a common fracture type in clinic, has high incidence rate, accounts for about 10 percent of all fractures, and is often caused by direct violence, indirect violence and mixed violence; the direct violence is mostly directly hit on the patella due to external force, such as bruise, kicking injury and the like, the fracture is mostly comminuted, the anterior tendinous membrane of the patella, the two side aponeuroses of the patella and the joint capsule are mostly kept intact, and the fracture can also be transverse fracture; indirect violence is usually caused by the violent contraction of quadriceps femoris muscle, which causes traction injury, such as sudden slipping, half flexion of knee joint, sudden contraction of quadriceps femoris muscle, upward traction of patella, and fixation of patella ligament at the lower part of patella, thereby causing fracture of patella.

When the patella fracture is repaired in a surgical mode, firstly, the patella main body and the fracture part need to be reset, then the patella main body and the fracture part are connected through the steel nails, in order to keep the stability of the fracture part after the fracture part is reset, the steel nails need to be arranged in an array along the circumferential direction of the patella, then, steel wires penetrate through the steel nails and are fastened and cut off, in the process of tightening the steel wires, tightening equipment needs to be used for operation, and generally, the following three conditions are common in the leading-out modes after the steel wires fix the steel needles, one is leading out of one single wire head, one is leading out of two wire heads, and the other is leading out of two single wire heads; at present, operations of leading out single-thread steel wire wires and leading out double-thread steel wire wires are respectively operated by two different tightening devices, and the operations of leading out two single-thread steel wire wires need two single-thread tightening devices, so that the medical cost is wasted, the space occupancy rate of the operation devices is increased, and the convenience of operation of doctors is influenced.

The Chinese patent with publication number CN110037788A discloses a medical instrument applied to patellar fracture repair, which comprises a rotating mechanism, a single-thread-head tensioning mechanism, a double-thread-head tensioning mechanism, a tensioning control mechanism and a power source, wherein the single-thread-head tensioning mechanism and the double-thread-head tensioning mechanism are respectively positioned at two ends of the rotating mechanism; after analysis, the technical scheme related in the invention patent has the following defects:

1) one device cannot solve the problem of operation involving two single-line head leading-out operations, and in case of the operation, two medical staff can only be used for operating the two devices to participate in the operation, so that medical resources are wasted, the working space of a doctor is occupied, and the operation efficiency is reduced;

2) in the technical scheme related to the invention patent, a single-thread-head tensioning mechanism and a double-thread-head tensioning mechanism are respectively positioned at two ends of a rotating mechanism, namely the equipment is simultaneously provided with the single-thread-head tensioning mechanism and the double-thread-head tensioning mechanism, but only one tensioning mechanism is applied in the operation, and the other tensioning mechanism is idle, and the equipment is operated by hands, so that the idle tensioning mechanism not only occupies the operation space, but also increases the load of arms when the medical personnel operate and increases the burden of the medical personnel;

3) referring to the patent document specifications [0065], [0066], [0067] and the drawings 23, 24 and 25 in the attached drawings, as the sleeve I (311) with the driving helical teeth (312) and the sleeve II (313) with the driven helical teeth (314) are adopted for transmission, the technical effect which is expected to be realized is that one-way transmission cannot be realized; in the process of tightening the steel wire, a doctor needs to try tightening force for multiple times before tying the steel wire head to enable the reduction of the bone gap to achieve the best effect, so that in the process of tightening the steel wire, if excessive tightening needs to be loosened, the equipment related in the patent cannot achieve the technical effect of loosening the steel wire, only the first hand-screwed bolt (214) or the second hand-screwed bolt (227) can be opened to loosen the compressed steel wire head, and after the initial state of the equipment is recovered, the compressed steel wire head is tightened again, so that the operation efficiency is seriously influenced, and secondary injury is also caused to the damaged patella;

4) because the driving helical gear (312) and the driven helical gear (314) are actually ratchet transmission structures, the number of teeth is certain, the minimum step number which can be realized by rotating a circle in the circumferential direction is also certain, and stepless transmission cannot be realized, so that the embarrassment condition that one step is too loose and the other step is too tight easily occurs in the operation, even if the number of teeth of the helical gear is increased, the degree of too loose or too tight can only be reduced, and the over-loose or too tight degree cannot be completely eliminated, moreover, the number of teeth is increased, the tooth shape is reduced, the material has stress limit, and the number of teeth of the helical gear cannot be infinitely increased;

5) reference is made to the technical features described in the above patent document descriptions in paragraphs [0065], [0066] and [0067 ]: there is no transmission structure capable of self-locking between the first transition gear (315) and the driving shaft 238, so that the technical effect "when the first driving helical tooth 312 rotates reversely, the first driving helical tooth 312 extrudes the second driven helical tooth 314 and the second sleeve 313 floats away from the first sleeve 311" in paragraph [0065] cannot be achieved, because after the first tightening of the steel wire, the steel wire has a certain tension, which tends to rotate reversely the second driven helical tooth 314, and furthermore, the second sleeve 313 is tightly pressed against the second sleeve 313 by the floating spring 317, therefore, in practical situations, when the first driving helical tooth 312 rotates reversely, the second sleeve 313 does not float away from the first sleeve 311 but rotates reversely with the first driving helical tooth 312, so that the tightened steel wire is loosened, and the technical effect of repeatedly wrenching the wrench 305 to tighten the steel wire cannot be achieved, such technical defect that the technical solution related in the above patent cannot achieve its technical purpose, the defects in the prior art can not be solved.

Disclosure of Invention

In order to solve the defects of the prior art, the invention aims to provide a medical instrument applied to a patella repair operation, which has the advantages of novel structure, convenient operation and high modularization degree, can select a proper module to be quickly spliced according to the actual condition of the operation, saves the operation time, reduces the operation cost and improves the operation quality.

The technical scheme adopted by the invention is as follows: the utility model provides a be applied to medical instrument of patella restoration operation, includes position appearance guiding mechanism, coupling mechanism, two first tightening mechanism of line, single first tightening mechanism of line, its characterized in that: the position and posture adjusting mechanism is used for adjusting the positions and postures of the double-wire-head tightening mechanism and the single-wire-head tightening mechanism and enabling the double-wire-head tightening mechanism and the single-wire-head tightening mechanism to be capable of always keeping the required positions and postures in work, the double-wire-head tightening mechanism can tighten steel wires led out by the double wire heads and steel wires led out by the two single wire heads, and the single-wire-head tightening mechanism can tighten the steel wires led out by one single wire head.

The pose adjusting mechanism comprises a lifting inner arm, a lifting outer arm, a first hand wheel, a gear shift lever, a second hand wheel, a transverse moving outer arm, a transverse moving inner arm, a pin shaft, a swinging frame, an insertion plate, a fourth hand wheel, a third hand wheel, a lifting screw rod, a transverse moving screw rod, a second worm wheel, a fastening plate, a sliding plate, a first spring, a change baffle, a transverse moving bevel gear, a turntable bearing and a first worm wheel, wherein the lifting inner arm is fixed on the side of the operating bed, the lifting outer arm and the lifting inner arm form a moving pair for enabling the supported medical instrument to be adjusted in the height direction, the lifting outer arm and the lifting inner arm form a moving pair, the second hand wheel is rotated after the gear shift lever is pulled upwards to realize the movement of the lifting outer arm in the vertical direction, the transverse moving outer arm and the lifting outer arm form a rotating pair for enabling the supported medical instrument to swing in the horizontal direction, the swinging outer arm and the first hand wheel drives the transverse moving outer arm to swing, so that, the swing rotating frame and the transverse moving inner arm form a rotating pair, the swing rotating frame is driven by a third hand wheel to rotate around a vertical shaft, the inserting plate and the swing rotating frame form a rotating pair, and the inserting plate is driven by a fourth hand wheel to rotate around a horizontal shaft.

Furthermore, the lifting inner arm is of a hollow square column structure, connecting lugs are arranged on two sides of the lower end of the lifting inner arm, the lifting inner arm can be tightly installed on the side face of the operating table through the connecting lugs through screws to provide stable support for the posture adjusting mechanism, a threaded hole is formed in the central position of the upper end of the lifting inner arm, the lifting inner arm is nested in the lifting outer arm and forms a moving pair with the lifting outer arm, a turntable bearing is arranged between the top end of the lifting outer arm and the lower side of the fastening plate to enable the lifting outer arm and the fastening plate to form a rotating pair, a first worm wheel is fixedly installed at the central position of the lower side of the fastening plate through screws, the front end of the first hand wheel is of a hand wheel structure which can be operated by hand and is convenient to rotate, the rear end of the first hand wheel is of a worm structure, the first hand wheel is installed at the position, close to the top end, the first hand wheel, the top end of the lifting screw rod is provided with an external spline, the top end of each protruding tooth of the external spline is provided with an inclined plane, the lifting screw rod is installed in the center of the inside of the lifting outer arm, axial positioning is realized through a spring collar for a shaft, the lower half section of the lifting screw rod is provided with screw rod threads, and the screw rod threads are matched with threaded holes in the upper end of the lifting inner arm to form a thread pair.

Further, a second hand wheel is arranged on the upper side of the left end of the transverse outer arm and is coaxial with the lifting screw rod, a hand wheel structure is arranged at the upper end of the second hand wheel, the hand wheel structure can be operated by hands and is convenient to rotate, the lower half part of the second hand wheel is of an external spline structure, a baffle plate is arranged at the lowest end of the transverse bevel gear through a screw, a bevel gear structure is arranged at the upper end of the transverse bevel gear, an internal spline structure is arranged at the lower end of each convex tooth of the internal spline, an inclined plane is arranged at the lower end of each convex tooth of the internal spline, an internal spline is also arranged at the center of the transverse bevel gear, the transverse bevel gear and the second hand wheel are coaxially arranged, the internal spline at the center of the transverse bevel gear and the external spline at the lower half part of the second hand wheel form a spline meshing, the left end of the gear shifting plate is provided with a rectangular cavity and two parallel through hole chutes, the sliding plate is installed in the rectangular cavity at the left end of the gear shifting plate and can slide in the two parallel through hole chutes, a first spring is arranged between the sliding plate and the right end of the rectangular cavity, the left end of the gear shifting rod is provided with a cross rod which is convenient to pull up and down in a hand-held manner for shifting, the middle position of the gear shifting rod and the left end of the transverse outer arm form a revolute pair, and the right end of the gear shifting rod and the two ends of the side surface of the sliding plate form a.

Furthermore, the transverse moving inner arm is of a hollow square columnar structure, a threaded hole is formed in the left end of the transverse moving inner arm, the transverse moving inner arm is nested inside the transverse moving outer arm and forms a moving pair, the transverse moving screw rod is mounted inside the transverse moving outer arm and forms a rotating pair, axial positioning of the transverse moving screw rod is achieved through a single elastic ring for a shaft, a bevel gear is arranged at the left end of the transverse moving screw rod, screw threads are formed in the right half portion of the transverse moving screw rod, and the screw threads are matched with the threaded hole in the left end of the transverse moving inner arm to form a thread.

Furthermore, after the cross rod at the left end of the gear shifting rod is pulled upwards, the internal spline at the lower end of the transverse bevel gear can be meshed with the external spline at the top end of the lifting screw rod, and the state is kept under the action of the elastic force of the first spring, and the second hand wheel is rotated to drive the lifting screw rod to rotate through the transverse bevel gear, so that the lifting outer arm is lifted and lowered; after a cross rod at the left end of the gear shifting rod is pulled downwards, a bevel gear structure at the upper end of the transverse bevel gear can be meshed with a bevel gear at the left end of the transverse screw rod, the transverse bevel gear structure is kept in the state under the action of the elastic force of the first spring, and the second hand wheel can be rotated to drive the transverse bevel gear to rotate so as to realize the left-right telescopic movement of the transverse inner arm.

Further, the pin shaft is tightly connected with the left end of the swing frame through a screw, the transverse inner arm and the swing frame form a rotation pair through the pin shaft, a second worm wheel is coaxially installed with the pin shaft and is connected with the pin shaft in a key mode to achieve the tight connection of the second worm wheel and the pin shaft, a third hand wheel is installed at the position, close to the right end, of the transverse inner arm and forms a rotation pair, the front end of the third hand wheel is of a hand wheel structure and can be operated by hands and can be conveniently rotated, the rear end of the third hand wheel is meshed with the second worm wheel to form a worm wheel and worm meshing relation, the right end of the swing frame and the rear end of the insertion plate form a rotation pair, the left end of the insertion plate is provided with a worm wheel structure, the fourth hand wheel is installed on the upper side of the right end of the swing frame and forms a rotation pair, the front end of the fourth hand wheel is of a hand wheel structure and can be, the worm gear meshing relation is formed, a flat plate structure is arranged at the right end of the insertion plate, four insertion columns are arranged on the upper side of the flat plate, an inclined plane is arranged at the top end of each insertion column, a hook is arranged at the middle position of each insertion column, and a rectangular window is arranged at the position, close to the middle position, of the insertion plate.

The connecting mechanism comprises a main body frame, a bottom plate, a clamping plate, set screws, a button, a second spring, a third spring and a hook, wherein a rectangular groove is arranged on the upper side of the front end of the main body frame, two rectangular jacks are arranged at the front end of the rectangular groove, a vertically through round hole is arranged at a position close to the middle of the rectangular groove, a hook cavity and a button hole in the vertical direction are arranged inside the rear end of the main body frame, the hook is arranged in the hook cavity and can slide back and forth in the hook cavity, an inclined surface structure is arranged at the front end of the hook, a rectangular opening is arranged at the middle of the hook, an inclined surface is arranged at the rear side of the button, the button passes through the rectangular opening in the middle of the hook and is arranged in the button hole of the main body frame, two threaded holes communicated with the hook cavity are arranged at the rear end of the main body frame, the two set, the cardboard is installed in the cardboard cavity, and can be in the cardboard cavity back-and-forth movement, be equipped with four horseshoe-shaped trompils on the cardboard, the cardboard rear end is equipped with one and presses the clamp plate, the intermediate position is equipped with the rectangle trompil, be provided with a second spring between cardboard front end position and the main part frame, be equipped with four round holes that are used for inserting the grafting post on the bottom plate, the bottom plate is installed in main part frame downside, and realize fastening connection between them through the screw, the round hole is equipped with the through hole with the axle center position in the middle of the bottom.

Further, in an initial state, under the action of the elastic force of a third spring, the hook is positioned at the front end of the hook cavity, the inclined surface structure at the front end of the hook extends into the rectangular groove on the upper side of the front end of the main body frame, the button is pressed downwards, the inclined surface at the rear side pushes the hook to move backwards, and the inclined surface structure at the front end of the hook retracts into the hook cavity; after the press of the button is released, the hook is restored to the initial position under the elastic force of the third spring.

Furthermore, under the action of the elastic force of the second spring, the clamping plate is positioned at the rear end of the cavity of the clamping plate, four inserting columns arranged on the inserting plate are inserted into four round holes arranged on the bottom plate, the clamping plate slides forwards and rebounds backwards under the action of the inclined plane at the top end of the inserting column and the second spring, and the straight line edges of four horseshoe-shaped openings on the clamping plate are clamped into hooks at the middle positions of the four inserting columns, so that the quick connection of the connecting mechanism and the pose adjusting mechanism is realized; the pressing plate at the rear end of the clamping plate is pressed to enable the pressing plate to move forwards, the straight edges of the four horseshoe-shaped openings are separated from the hooks in the middle positions of the four inserting columns, the connecting mechanism is taken away upwards, and the connecting mechanism and the pose adjusting mechanism can be quickly disengaged.

Furthermore, the set screw and the main body framework form a thread pair connection, and the pre-tightening elastic force of the third spring is adjusted to realize the adjustment of the pressing and rebounding force of the button.

The double-end tightening mechanism comprises a double-end rack, a fifth hand wheel, a first wrench, a first winding drum, a first locking knob, a left first guide wheel, a left connecting rod, a chute piece, a screw rod, a left second connecting rod, a left long rod, a left second guide wheel, a left three guide wheel, a right two guide wheel, a right long rod, a right two connecting rod, a right first guide wheel, a second locking knob, a second winding drum, a second wrench, a first bevel gear set, a right end cover, a second worm gear, a first planet bevel gear, a left end cover, a second bevel gear set and a second planet bevel gear, wherein the left connecting rod, the left connecting rod and the left long rod are arranged at the left front end of the double-end rack, the four form an unequal-sided quadrangle, the right connecting rod, the right long rod and the right long rod are arranged at the right front end of the double-end rack, the four form an unequal-sided quadrangle, the chute, the fifth hand wheel drives the first winding drum and the second winding drum to rotate through a transmission structure consisting of a first bevel gear set, a right end cover, a second worm gear, a first planet bevel gear, a left end cover, a second bevel gear set and a second planet bevel gear, so that the steel wire led out by the double wire heads or the steel wire led out by the two single wire heads can be tightened and loosened.

The two sides of the front end of the double-end rack are respectively provided with an extending arm, the rear end of the double-end rack is of a double-layer structure consisting of an upper plate and a lower plate, a threaded hole is formed in the middle of the upper plate of the double-end rack, the lower plate is of a rectangular structure with the same size as the rectangular groove on the upper side of the front end of the main body rack, two inserting plates are arranged at the front end of the lower plate, the rear ends of the upper plate and the lower plate are provided with coaxial through round holes, a hand wheel structure is arranged at the upper end of a fifth hand wheel which can be operated by hands and is convenient to rotate, a worm structure is arranged in the middle of the fifth hand wheel, an internal spline is arranged at the lower end of the fifth hand wheel, the fifth hand wheel is arranged in the round holes on the rear ends of the upper plate and the lower plate of the double-end rack, the second worm wheel is arranged between the upper plate and the lower plate of the double-, the left end cover is fastened and connected with the left end of the second worm gear through a screw, the first bevel gear set and the right end cover form a revolute pair, bevel gear structures are arranged at two ends of the first bevel gear set, the bevel gear structure at the left end of the first bevel gear set is meshed with the first planetary bevel gear and the second planetary bevel gear at the same time, the second bevel gear set and the left end cover form a revolute pair, bevel gear structures are arranged at two ends of the second bevel gear set, and the bevel gear structure at the right end of the second bevel gear set is meshed with the first planetary bevel gear and the.

Furthermore, a variable-diameter groove is formed in the cylindrical side surface of the first winding drum, a left thread end penetrating into the variable-diameter groove can be smooth excessively, the width of the variable-diameter groove can only accommodate a single steel wire to penetrate into the variable-diameter groove, a first wrench is installed at a position close to the bottom end of the variable-diameter groove, an eccentric wheel structure is arranged at the lower end of the first wrench, the first wrench is pulled anticlockwise after the left thread end penetrates into the variable-diameter groove and passes through a gap between the eccentric wheel and the variable-diameter groove, the eccentric wheel structure can tightly press the left thread end, a threaded hole is formed in the first winding drum, a first locking knob and the threaded hole form a thread pair, the first winding drum is installed on the left side of the double-thread-end rack, the first winding drum and the double-thread-end rack form a rotating pair, a bevel; the cylinder side of second reel is provided with a variable diameter recess in, can make the excessive rounding and smoothing of right end of a thread that penetrates wherein, variable diameter recess width can only hold single steel wire line and penetrate, install the second spanner in the position that is close to variable diameter recess bottom, the second spanner lower extreme is equipped with the eccentric wheel structure, after right end of a thread penetrates variable diameter recess and passes through the gap between eccentric wheel and the variable diameter recess, clockwise pull the second spanner, can make the eccentric wheel structure compress tightly right end of a thread, be equipped with a screw hole in the second reel, this screw hole of second locking knob constitutes the screw thread pair, the second reel is installed in two end of a thread frame right sides, both constitute the revolute pair, second reel lower extreme is equipped with the bevel gear structure, this bevel gear structure meshes with the bevel gear structure of first bevel gear group right-hand member.

Furthermore, the front end of the screw rod is provided with a disc structure capable of being manually rotated, the rear end of the screw rod is of a threaded structure, the threaded structure is matched with a threaded hole in the middle of the upper plate of the double-thread-head rack to form a threaded pair, the middle of the sliding groove piece is provided with a round hole, the left side and the right side of the sliding groove piece are provided with a long-strip hole, the screw rod is arranged in the round hole in the middle of the sliding groove piece, and the screw rod and the sliding groove piece.

Further, a left connecting rod one end and the left extension arm of the double-thread-head rack form a revolute pair, the other end and the rear end of the left long rod form a revolute pair, one end of a left two connecting rod and the left extension arm of the double-thread-head rack form a revolute pair, the other end and the middle position of the left long rod form a revolute pair, the front end of the left long rod is provided with a left two guide wheel and a left three guide wheel, the rear end of the left long rod is provided with a left guide wheel, the rear end of the left long rod is provided with a protruding shaft extending downwards, and the protruding shaft can slide in a.

Further, right connecting rod one end constitutes the revolute pair with the cantilever arm on double thread end frame right side, the other end constitutes the revolute pair with right stock rear end, two right connecting rod one end constitute the revolute pair with the cantilever arm on double thread end frame right side, the other end constitutes the revolute pair with right stock intermediate position, right stock front end is equipped with two right guide pulleys and three right guide pulleys, right stock rear end is equipped with a right guide pulley, and right stock rear end is equipped with a protrusion axle that stretches out downwards, this protrusion axle can slide in the rectangular trompil on chute spare right side.

Furthermore, the length of the left connecting rod and the right connecting rod is 40mm, the length of the left connecting rod and the right connecting rod is 35mm, the distance between the left end axle center of the left connecting rod and the left end axle center of the left connecting rod is 45mm, the distance between the right end axle center of the left connecting rod and the right end axle center of the left connecting rod is 50mm, the distance between the right end axle center of the right connecting rod and the right end axle center of the right connecting rod is 45mm, the distance between the left end axle center of the right connecting rod and the left end axle center of the right connecting rod is 50mm, and the equilateral quadrangle formed by the parts can enable the left three guide wheels and the right three guide wheels to have a large distance adjusting.

Furthermore, in the initial state, the screw rod retracts into a threaded hole in the middle of the upper plate of the double-end rack, the distance between the left three guide wheels and the right three guide wheels is the nearest, when the screw rod is screwed out of the threaded hole, the slide groove piece moves forwards, so that the left long rod and the right long rod move forwards, in the process, as the left extension arm, the left connecting rod, the left two connecting rod, the left long rod, the right extension arm, the right connecting rod, the right long rod of the double-end rack form a quadrilateral with a specific side length, the front ends of the left long rod and the right long rod are opened, the left three guide wheels and the right three guide wheels can be adjusted to the distance required by the operation; after the screw is screwed into the threaded hole, the components return to the initial state.

The single-thread-end tightening mechanism comprises a single-thread-end rack, a sixth hand wheel, a third winding drum, a third wrench and a worm gear set, wherein a lead hole is formed in the front end of the single-thread-end rack, the rear end of the single-thread-end rack is of a double-layer structure formed by an upper plate and a lower plate, the lower plate is of a rectangular structure with the same size as a rectangular groove in the upper side of the front end of a main body rack, two inserting plates are arranged at the front end of the lower plate, coaxial and through round holes are formed in the rear ends of the upper plate and the lower plate, the upper end of the sixth hand wheel is of a hand wheel structure, manual operation can be achieved, rotation is facilitated, a worm structure is arranged in the middle of the sixth hand wheel, an internal spline is arranged at the lower end of the lower plate, the sixth hand wheel is arranged in the round holes in the rear ends of the upper plate and the lower plate of the single-thread-end.

Further, be provided with a variable diameter recess in the third reel cylinder side, can make the excessive rounding and smoothing of single line head steel wire that penetrates wherein, variable diameter recess width only can hold single steel wire and penetrate, install the third spanner in the position that is close to variable diameter recess bottom, third spanner lower extreme is equipped with the eccentric wheel structure, after single line head steel wire penetrated variable diameter recess and passed through the gap between eccentric wheel and the variable diameter recess, clockwise pull the third spanner, can make the eccentric wheel structure compress tightly single line head steel wire, the third reel is installed in single line head frame right side, both constitute the revolute pair, third reel lower extreme is equipped with bevel gear structure, this bevel gear structure meshes with the bevel gear structure of worm gear group left end.

The invention has the beneficial effects that:

compared with the traditional handheld steel wire tightening device, the pose adjusting mechanism with five degrees of freedom is adopted in the invention to provide support and pose adjustment for the double-wire-head tightening mechanism and the single-wire-head tightening mechanism, so that the device has the advantages of high degree of freedom, stable support, high position precision and long continuous support time;

the pose adjusting mechanism and the connecting mechanism adopt a modular connecting structure, so that quick connection and disconnection can be realized, and the double-thread-head tightening mechanism, the single-thread-head tightening mechanism and the connecting mechanism also adopt a modular connecting structure, so that quick connection and disconnection can be realized, and the modular quick assembly and disassembly can save a large amount of operation time and improve the operation efficiency;

the double-wire-end tightening mechanism can tighten the steel wire led out by the double wire ends and can tighten the steel wire led out by the two single wire ends, so that the effect of one machine with multiple purposes is realized, the purchase cost of the medical equipment is reduced, and the development direction of the medical equipment towards high integration is met;

the pressing of the steel wire end in the traditional technology is mostly in a thread pair extrusion mode, the pressing force generated by the thread pair is limited due to the limitation of hand strength of operators, and the steel wire end is easy to separate when the steel wire is tightened with large force; when screwing the thread pair, the steel wire end can be pressed by rotating for a plurality of circles, so that the operation is troublesome and the consumed time is long; the thread pair is easy to wear to cause thread slipping after being used for many times, and the maintenance cost is increased; in the application of the invention, taking the first winding drum as an example, the first winding drum is provided with a groove which can only accommodate a single steel wire to penetrate into a variable diameter groove, and is combined with a first wrench with an eccentric wheel structure to realize the compaction of a steel wire end, and the eccentric wheel compaction has the property of tightening the steel wire end more and more, so that the steel wire end cannot be separated from the first winding drum even if the tightening force of the steel wire is increased after the eccentric wheel structure compacts the steel wire end; the first wrench is only needed to be wrenched left and right to press and loosen the wire end, so that the operation is quick and convenient;

in the equipment for tightening the steel wire in the traditional technology, the ratchet structure is mostly adopted to realize the one-way transmission of power, so that the conditions of less and more over-loosening and over-tightening are easy to occur in the process of tightening the steel wire, and the technical effect of slowly loosening the steel wire under the condition of over-tightening the steel wire is not easy to realize; the double-wire-head tightening mechanism and the single-wire-head tightening mechanism in the application of the invention both adopt worm and gear structures in the power transmission process, have self-locking function, prevent reverse power transmission, have large transmission ratio, can carry out stepless regulation on tightening force, and can realize the tightening and loosening of steel wires through the positive and negative rotation of the worm.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

Fig. 2 is a schematic structural diagram of the pose adjusting mechanism, the connecting mechanism and the double-thread-head tightening mechanism after being assembled.

Fig. 3 is a schematic structural view of the posture adjustment mechanism.

Fig. 4 is a schematic sectional structure view of the posture adjustment mechanism.

Fig. 5 is a schematic view of a partial sectional structure of the pose adjusting mechanism after the shift lever is pulled upward.

Fig. 6 is a schematic view of a partial sectional structure of the posture adjustment mechanism after the shift lever is pulled down.

Fig. 7 is a partial sectional view schematically showing a traverse bevel gear.

Fig. 8 is a schematic partial explosion view of the posture adjustment mechanism.

Fig. 9 is a schematic structural view of the connection mechanism.

Fig. 10 is an exploded view of the attachment mechanism.

Fig. 11 is a schematic partial sectional view of the connection mechanism connected to the plugboard and the dual-line-head rack.

Fig. 12 is a schematic partial sectional view of the connection mechanism connected to the plugboard and the dual-line-head rack.

Fig. 13 is a schematic structural view of the double-thread-head tightening mechanism.

Fig. 14 is a cross-sectional view of the double thread end take-up mechanism.

Fig. 15 is a schematic longitudinal sectional view of the double thread end take-up mechanism.

Fig. 16 is an exploded view of a dual wire-head tightening mechanism.

Fig. 17 is a schematic structural diagram of a two-wire rack.

Fig. 18 is a partial sectional view schematically showing the structure of the first reel.

Fig. 19 is a schematic view of a double-end wire tensioning mechanism tensioning a double-end wire.

Fig. 20 is a partial cross-sectional schematic view of a single-lead take-up mechanism.

FIG. 21 is a schematic view of a single thread take-up mechanism taking up a single thread of steel wire.

Reference numerals: 1 pose adjusting mechanism, 101 lifting inner arm, 101.1 connecting lug, 102 lifting outer arm, 103 first hand wheel, 104 shift lever, 105 second hand wheel, 106 transverse outer arm, 107 transverse inner arm, 108 pin shaft, 109 swinging frame, 110 plug board, 110.1 plug post, 111 fourth hand wheel, 112 third hand wheel, 113 lifting screw rod, 114 transverse screw rod, 115 second worm wheel, 116 fastening board, 117 sliding board, 118 first spring, 119 shift plate, 120 transverse bevel gear, 121 turntable bearing and 122 first worm wheel;

2, a connecting mechanism, a 201 main body frame, 201.1 jacks, a 202 bottom plate, a 203 clamping plate, 204 set screws, 205 buttons, 206 second springs, 207 third springs and 208 hooks;

3 double-thread-end tightening mechanism, 301 double-thread-end frame, 301.1 spile, 302 fifth hand wheel, 303 first wrench, 304 first reel, 305 first locking knob, 306 left guide wheel, 307 left connecting rod, 308 sliding groove component, 309 screw rod, 310 left connecting rod, 311 left long rod, 312 left guide wheel, 313 left three guide wheel, 314 right three guide wheel, 315 right two guide wheel, 316 right long rod, 317 right connecting rod, 318 right connecting rod, 319 right guide wheel, 320 second locking knob, 321 second reel, 322 second wrench, 323 first bevel gear set, 324 right end cap, 325 second worm gear, 326 first planetary bevel gear, 327 left end cap, 328 second bevel gear set, 329 second planetary bevel gear;

4 single-thread-end tightening mechanism, 401 single-thread-end rack, 402 sixth hand wheel, 403 third winding drum, 404 third wrench, 405 worm gear set;

5 single thread steel wire, 6 double thread steel wire, 6.1 left thread end and 6.2 right thread end.

Detailed Description

The present invention will be further described with reference to specific examples, which are illustrative of the invention and are not to be construed as limiting the invention.

As shown in fig. 1 and 2, a medical instrument applied to a patella repair surgery comprises a pose adjusting mechanism 1, a connecting mechanism 2, a double-thread tightening mechanism 3 and a single-thread tightening mechanism 4, and is characterized in that: the pose adjusting mechanism 1 can be quickly connected and disconnected with the connecting mechanism 2, a modular connecting structure is also adopted between the double-wire-head tightening mechanism 3 and the single-wire-head tightening mechanism 4 and the connecting mechanism 2, the rapid connection and disconnection can be realized, the pose adjusting mechanism 1 is used for realizing the position and posture adjustment of the double-wire-head tightening mechanism 3 and the single-wire-head tightening mechanism 4, the double-wire-head tightening mechanism 3 and the single-wire-head tightening mechanism 4 can always keep required positions and postures in work, the double-wire-head tightening mechanism 3 can tighten steel wires led out by double wires and the steel wires led out by two single wires, and the single-wire-head tightening mechanism 4 can tighten the steel wires led out by one single wire head.

As shown in fig. 3 and 4, the posture adjustment mechanism 1 includes a lifting inner arm 101, a lifting outer arm 102, a first hand wheel 103, a shift lever 104, a second hand wheel 105, a traverse outer arm 106, a traverse inner arm 107, a pin 108, a swing frame 109, a socket plate 110, a fourth hand wheel 111, a third hand wheel 112, a lifting screw 113, a traverse screw 114, a second worm wheel 115, a fastening plate 116, a sliding plate 117, a first spring 118, a shift plate 119, a traverse bevel gear 120, a turntable bearing 121, and a first worm wheel 122, the lifting inner arm 101 is fixed to the side of the operating table, the lifting outer arm 102 and the lifting inner arm 101 constitute a moving pair, the lifting outer arm 102 is vertically moved by turning the second hand wheel 105 after pulling the shift lever 104 upward, and the supported medical device is horizontally swung, the outer transverse arm 106 and the outer lifting arm 102 form a rotation pair, the outer transverse arm 106 is driven to swing by the first hand wheel 103, in order to enable a supported medical instrument to move in the horizontal direction, the inner transverse arm 107 and the outer transverse arm 106 form a movement pair, the inner transverse arm 107 is driven to move in the horizontal direction by turning the second hand wheel 105 after the gear shift lever 104 is turned downwards, in order to enable the supported medical instrument to rotate around a vertical shaft, the swing frame 109 and the inner transverse arm 107 form a rotation pair, the swing frame 109 is driven to rotate around the vertical shaft by the third hand wheel 112, in order to enable the supported medical instrument to rotate around a horizontal shaft, the plug board 110 and the swing frame 109 form a rotation pair, and the plug board 110 is driven to rotate around the horizontal shaft by the fourth hand wheel 111.

As shown in fig. 5 and 6, the inner lifting arm 101 is a hollow square column structure, two sides of the lower end of the inner lifting arm are provided with connecting lugs 101.1, the inner lifting arm 101 can be fastened and mounted on the side surface of the operating table through the connecting lugs 101.1 to provide stable support for the posture adjusting mechanism 1, the central position of the upper end of the inner lifting arm 101 is provided with a threaded hole, the inner lifting arm 101 is nested and mounted inside the outer lifting arm 102, and the two arms form a moving pair, a turntable bearing 121 is arranged between the top end of the outer lifting arm 102 and the lower side of the fastening plate 116, so that the outer lifting arm 102 and the fastening plate 116 form a rotating pair, a first worm wheel 122 is fixedly mounted at the central position of the lower side of the fastening plate 116 through a screw, the front end of a first hand wheel 103 is a hand wheel structure which can be operated by hand and is convenient to rotate, the rear end of the first hand wheel 103 is a worm structure, the first hand wheel 103, the worm structure at the rear end of the first hand wheel 103 and the first worm wheel 122 form a worm and gear meshing relationship, the top end of the lifting screw rod 113 is provided with an external spline, the top ends of all protruding teeth of the external spline are provided with inclined planes, the lifting screw rod 113 is installed at the center inside the lifting outer arm 102, axial positioning is realized through a spring retainer ring for a shaft, the lower half section of the lifting screw rod 113 is provided with screw rod threads, and the screw rod threads are matched with threaded holes in the upper end of the lifting inner arm 101 to form a thread pair.

As shown in fig. 5, 6 and 7, the second hand wheel 105 is mounted on the upper side of the left end of the traverse outer arm 106 and is coaxial with the lifting screw 113, the upper end of the second hand wheel 105 is of a hand wheel structure which can be operated by hand and is convenient to rotate, the lower half part of the second hand wheel is of an outer spline structure, the lowest end of the second hand wheel is provided with a baffle plate through a screw, the upper end of the traverse bevel gear 120 is of a bevel gear structure, the lower end of the traverse bevel gear 120 is provided with an inner spline structure, the lower end of each protruding tooth of the inner spline is provided with an inclined surface, the center of the traverse bevel gear 120 is also provided with an inner spline, the traverse bevel gear 120 is coaxial with the second hand wheel 105, the inner spline at the center of the traverse bevel gear 120 and the outer spline at the lower half part of the second hand wheel 105 form a spline engagement relationship, that is, the right end of the shifting plate 119 is mounted in the middle of the transverse shifting bevel gear 120, the shifting plate and the bevel gear 120 form a revolute pair, the left end of the shifting plate 119 is provided with a rectangular cavity and two parallel through hole chutes, the sliding plate 117 is mounted in the rectangular cavity at the left end of the shifting plate 119 and can slide in the two parallel through hole chutes, a first spring 118 is arranged between the sliding plate 117 and the right end of the rectangular cavity, the left end of the shifting rod 104 is provided with a cross rod which is convenient to pull up and down by hand to shift gears, the middle of the shifting rod and the left end of the transverse shifting outer arm 106 form a revolute pair, and the right end of the shifting.

As shown in FIG. 4, the inner transverse arm 107 is a hollow square column structure, the left end of the inner transverse arm is provided with a threaded hole, the inner transverse arm 107 is nested inside the outer transverse arm 106 and forms a moving pair, the transverse screw rod 114 is installed inside the outer transverse arm 106 and forms a rotating pair, the axial positioning of the transverse screw rod 114 is realized by a single elastic circle for one shaft, the left end of the transverse screw rod 114 is provided with a bevel gear, the right part of the transverse screw rod is provided with screw rod threads, and the screw rod threads are matched with the threaded hole at the left end of the inner transverse arm 107 to form a thread pair.

As shown in fig. 5 and 6, after the cross bar at the left end of the shift lever 104 is pulled upwards, the internal splines at the lower end of the traverse bevel gear 120 can be engaged with the external splines at the top end of the lifting screw 113, and the state is maintained under the elastic force of the first spring 118, and the second hand wheel 105 is rotated to drive the lifting screw 113 to rotate through the traverse bevel gear 120, so that the lifting outer arm 102 is lifted and lowered; after the transverse rod at the left end of the shift lever 104 is pulled downwards, the bevel gear structure at the upper end of the transverse bevel gear 120 can be meshed with the bevel gear at the left end of the transverse screw rod 114, and the transverse bevel gear structure is kept in the state under the action of the elastic force of the first spring 118, and the second hand wheel 105 can be rotated to drive the transverse screw rod 114 to rotate through the transverse bevel gear 120, so that the transverse inner arm 107 can be moved in a left-right telescopic mode.

As shown in fig. 4 and 8, the pin 108 is fastened to the left end of the swing frame 109 by a screw, the inner transverse arm 107 forms a rotation pair with the swing frame 109 by the pin 108, the second worm wheel 115 is coaxially mounted with the pin 108 and is fastened to the pin 108 by a key connection, the third hand wheel 112 is mounted at a position close to the right end of the inner transverse arm 107 and forms a rotation pair, the front end of the third hand wheel 112 is of a hand wheel structure and can be operated by hand and conveniently rotated, the rear end of the third hand wheel 112 is of a worm structure and is meshed with the second worm wheel 115 to form a worm-gear meshing relationship, the right end of the swing frame 109 and the rear end of the insertion plate 110 form a rotation pair, the left end of the insertion plate 110 is provided with a worm wheel structure, the fourth hand wheel 111 is mounted on the upper side of the right end of the swing frame 109 and forms a rotation pair, the front end of the fourth hand wheel 111 is of a hand wheel structure and can be operated by, and the worm structure meshes with the worm gear structure at the left end of the plugboard 110 to form a worm and gear meshing relationship, the right end of the plugboard 110 is provided with a flat plate structure, the upper side of the flat plate is provided with four pluging columns 110.1, the top end of each pluging column 110.1 is provided with an inclined plane, the middle position of each pluging column is provided with a hook, and the plugboard 110 is provided with a rectangular window close to the middle position.

As shown in fig. 9 and 10, the connecting mechanism 2 includes a main body frame 201, a bottom plate 202, a clamping plate 203, a set screw 204, a button 205, a second spring 206, a third spring 207, and a hook 208, wherein a rectangular groove is provided on the upper side of the front end of the main body frame 201, two rectangular insertion holes 201.1 are provided on the front end of the rectangular groove, a through hole is provided near the middle position of the rectangular groove, a hook cavity and a button hole in the vertical direction are provided inside the rear end of the main body frame 201, the hook 208 is installed in the hook cavity and can slide back and forth in the hook cavity, an inclined plane structure is provided on the front end of the hook 208, a rectangular opening is provided on the middle position, an inclined plane is provided on the rear side of the button 205, the button 205 passes through the rectangular opening in the middle of the hook 208 and is installed in the button hole of the main body frame 201, two threaded holes communicated with the hook cavity, two third springs 207 set up respectively between two holding screw 204 and couple 208, main part frame 201 downside is equipped with the cardboard cavity, cardboard 203 is installed in the cardboard cavity, and can be in the cardboard cavity back-and-forth movement, be equipped with four horseshoe trompils on the cardboard, cardboard 203 rear end is equipped with a pressure board, the intermediate position is equipped with the rectangle trompil, be provided with a second spring 206 between cardboard 203 front end position and the main part frame 201, be equipped with four round holes that are used for inserting peg post 110.1 on the bottom plate 202, bottom plate 202 installs in main part frame 201 downside, and realize fastening connection between them through the screw, round hole coaxial center position is equipped with the through-hole in the middle of the rectangular recess with main part frame 201 in the middle of bottom.

As shown in fig. 11 and 13, in an initial state, under the action of the elastic force of the third spring 207, the hook 208 is located at the front end of the hook cavity, the inclined surface structure at the front end of the hook 208 extends into the rectangular groove at the upper side of the front end of the main body frame 201, the button 205 is pressed downwards, and the inclined surface at the rear side pushes the hook 208 to move backwards, so that the inclined surface structure at the front end of the hook 208 retracts into the hook cavity; after releasing the pressing of the button 205, the hook 208 is restored to the original position by the elastic force of the third spring 207.

As shown in fig. 11 and 12, under the action of the elastic force of the second spring 206, the locking plate 203 is located at the rear end of the cavity of the locking plate, after the four plugging columns 110.1 arranged on the plugging plate 110 are inserted into the four round holes arranged on the bottom plate 202, under the action of the inclined planes at the top ends of the plugging columns 110.1 and the second spring 206, the locking plate 203 slides forwards and rebounds backwards, and the straight edges of the four horseshoe-shaped openings on the locking plate 203 are clamped into the hooks at the middle positions of the four plugging columns 110.1, so that the quick connection of the connecting mechanism 2 and the pose adjusting mechanism 1 is realized; the pressing plate at the rear end of the clamping plate 203 is pressed to enable the pressing plate 203 to move forwards, the straight edges of the four horseshoe-shaped holes are separated from the hooks at the middle positions of the four inserting columns 110.1, the connecting mechanism 2 is taken away upwards, and the connecting mechanism 2 and the pose adjusting mechanism 1 can be rapidly disengaged.

The set screw 204 and the main body frame 201 form a thread pair connection, and the pressing and resilience of the button 205 can be adjusted by adjusting the pre-tightening elastic force of the third spring 207.

As shown in fig. 13, 14, 15, 16, and 17, the double wire-head tightening mechanism 3 includes a double wire-head frame 301, a fifth hand wheel 302, a first wrench 303, a first reel 304, a first locking knob 305, a left guide wheel 306, a left connecting rod 307, a chute member 308, a screw 309, a left connecting rod 310, a left long rod 311, a left guide wheel 312, a left guide wheel 313, a right guide wheel 314, a right guide wheel 315, a right long rod 316, a right connecting rod 317, a right connecting rod 318, a right guide wheel 319, a second locking knob 320, a second reel 321, a second wrench 322, a first bevel gear set 323, a right end cover 324, a second worm wheel 325, a first planetary bevel gear 326, a left end cover 327, a second bevel gear set 328, a second planetary bevel gear 329, a left connecting rod 307, a left connecting rod 310, and a left long rod 311, wherein the double wire-head tightening mechanism 3 includes a double wire-head frame 301, a fifth hand wheel 302, a first wrench 303, a first reel 304, a first locking, The right two connecting rods 317 and the right long rod 316 are arranged at the right front end of the double-thread end rack 301 and form a trapezoid, the sliding groove member 308 and the screw 309 are arranged at the middle position of the front end of the double-thread end rack 301, for adjusting the opening position of the left long rod 311 and the right long rod 316, the first wrench 303, the first winding drum 304 and the first locking knob 305 are arranged at the left side of the double-thread-head rack 301, used for tightening the left wire end 6.1 or a first steel wire, a second locking knob 320, a second winding drum 321 and a second wrench 322 are arranged at the right side of the double-wire-end rack 301, the fifth hand wheel 302 is used for tightening the right thread head 6.2 or the second steel wire, and the fifth hand wheel drives the first winding drum 304 and the second winding drum 321 to rotate through a transmission structure consisting of a first bevel gear group 323, a right end cover 324, a second worm gear 325, a first planetary bevel gear 326, a left end cover 327, a second bevel gear group 328 and a second planetary bevel gear 329, so that tightening and loosening of the steel wire led out by the double thread head or the steel wire led out by the two single thread heads are realized.

The two sides of the front end of the double-line-head rack 301 are respectively provided with an extending arm, the rear end of the double-line-head rack 301 is of a double-layer structure formed by an upper plate and a lower plate, the middle position of the upper plate of the double-line-head rack 301 is provided with a threaded hole, the lower plate is of a rectangular structure with the same size as the rectangular groove on the upper side of the front end of the main body frame 201, the front end of the lower plate is provided with two plug plates 301.1, the rear ends of the upper plate and the lower plate are provided with coaxial and through round holes, the upper end of a fifth hand wheel 302 is of a hand wheel structure which can be operated by hands and is convenient to rotate, the middle part of the fifth hand wheel is of a worm structure, the lower end of the fifth hand wheel 302 is arranged in the round holes on the rear ends of the upper plate and the lower plate of the double-line-head rack 301, the second worm wheel 325 is arranged between the upper plate, the right end cover 324 is fastened and connected with the right end of the second worm gear 325 through a screw, the left end cover 327 is fastened and connected with the left end of the second worm gear 325 through a screw, the first bevel gear set 323 and the right end cover 324 form a rotating pair, both ends of the first bevel gear set 323 are provided with bevel gear structures, the bevel gear structure at the left end is simultaneously meshed with the first planetary bevel gear 326 and the second planetary bevel gear 329, the second bevel gear set 328 and the left end cover 327 form a rotating pair, both ends of the second bevel gear set 328 are provided with bevel gear structures, and the bevel gear structure at the right end is simultaneously meshed with the first planetary bevel gear 326 and the second planetary bevel gear 329.

As shown in fig. 18 and 19, a variable diameter groove is formed in a cylindrical side surface of the first winding drum 304, so that a left thread end 6.1 penetrating into the variable diameter groove is excessively smooth, the width of the variable diameter groove can only accommodate a single steel wire to penetrate into the variable diameter groove, a first wrench 303 is installed at a position close to the bottom end of the variable diameter groove, an eccentric wheel structure is arranged at the lower end of the first wrench 303, after the left thread end 6.1 penetrates into the variable diameter groove and passes through a gap between the eccentric wheel and the variable diameter groove, the first wrench 303 is pulled counterclockwise, so that the eccentric wheel structure can be pressed against the left thread end 6.1, a threaded hole is formed in the first winding drum 304, a first locking knob 305 and the threaded hole form a thread pair, the first winding drum 304 is installed at the left side of the double thread head frame 301, both form a rotation pair, a bevel gear structure is arranged at the lower end of the first winding drum; a variable diameter groove is arranged in the cylindrical side surface of the second winding drum 321, a right thread end 6.2 which penetrates into the variable diameter groove is excessively smooth, the width of the variable diameter groove can only accommodate a single steel wire to penetrate into the variable diameter groove, a second wrench 322 is arranged at a position close to the bottom end of the variable diameter groove, an eccentric wheel structure is arranged at the lower end of the second wrench 322, after the right thread end 6.2 penetrates into the variable diameter groove and passes through a gap between the eccentric wheel and the variable diameter groove, the second wrench 322 is pulled clockwise, the eccentric wheel structure can be tightly pressed against the right thread end 6.2, a threaded hole is arranged in the second winding drum 321, the threaded hole of the second locking knob 320 forms a thread pair, the second winding drum 321 is arranged on the right side of the double-thread-end frame 301, the second winding drum 321 and the double-thread-end frame constitute a rotating pair, a bevel gear structure.

As shown in fig. 13 and 15, the front end of the screw 309 is provided with a manually rotatable disk structure, the rear end of the screw is provided with a thread structure, the thread structure is matched and installed with a threaded hole at the middle position of the upper plate of the double-thread-head rack 301 to form a thread pair, the middle position of the chute member 308 is provided with a round hole, the left side and the right side are provided with a long-strip opening, and the screw 309 is installed in the round hole at the middle position of the chute member 308 to form a rotation pair.

As shown in fig. 13, one end of the left connecting rod 307 and the left extending arm of the two-string head frame 301 form a rotation pair, the other end and the rear end of the left long rod 311 form a rotation pair, one end of the left connecting rod 310 and the left extending arm of the two-string head frame 301 form a rotation pair, the other end and the middle position of the left long rod 311 form a rotation pair, the front end of the left long rod 311 is provided with a left second guide wheel 312 and a left third guide wheel 313, the rear end of the left long rod 311 is provided with a left first guide wheel 306, and the rear end of the left long rod 311 is provided with a projecting shaft extending downwards, which can slide in the long strip opening on the left.

As shown in fig. 13, one end of the right connecting rod 318 and the extending arm on the right side of the two-string head frame 301 form a rotation pair, the other end and the rear end of the right long rod 316 form a rotation pair, one end of the right connecting rod 317 and the extending arm on the right side of the two-string head frame 301 form a rotation pair, the other end and the middle position of the right long rod 316 form a rotation pair, the front end of the right long rod 316 is provided with a right two guide wheel 315 and a right three guide wheel 314, the rear end of the right long rod 316 is provided with a right one guide wheel 319, and the rear end of the right long rod 316 is provided with a projecting shaft extending downwards, which can slide in the.

As shown in fig. 13 and 19, the length of the left connecting rod 307 and the right connecting rod 318 is 40mm, the length of the left connecting rod 310 and the right connecting rod 317 is 35mm, the distance between the left end axis of the left connecting rod 307 and the left end axis of the left connecting rod 310 is 45mm, the distance between the right end axis of the left connecting rod 307 and the right end axis of the left connecting rod 310 is 50mm, the distance between the right end axis of the right connecting rod 318 and the right end axis of the right connecting rod 317 is 45mm, and the distance between the left end axis of the right connecting rod 318 and the left end axis of the right connecting rod 317 is 50 mm.

As shown in fig. 13 and 19, in an initial state, the screw 309 is retracted into the threaded hole in the middle of the upper plate of the double thread end machine frame 301, the distance between the left three guide wheels 313 and the right three guide wheels 314 is the closest, when the screw 309 is screwed out of the threaded hole, the slide groove member 308 moves forward, so that the left long rod 311 and the right long rod 316 move forward, and in the process, due to the action of a quadrangle with a specific side length formed by the left extending arm, the left connecting rod 307, the left two connecting rod 310, the left long rod 311, the right extending arm of the double thread end machine frame 301, the right connecting rod 318, the right two connecting rod 317 and the right long rod 316, the front ends of the left long rod 311 and the right long rod 316 are expanded, so that the left three guide wheels 313 and the right three guide wheels 314 can be adjusted to the distance; after the screw 309 is screwed into the threaded hole, the components return to the initial state.

As shown in fig. 20 and 21, the single-thread-head tightening mechanism 4 includes a single-thread-head frame 401, a sixth handwheel 402, a third winding drum 403, a third wrench 404, and a worm gear group 405, wherein the single-thread-head frame 401 has a lead hole at the front end, the rear end is a double-layer structure formed by an upper plate and a lower plate, the lower plate is a rectangular structure having the same size as the rectangular groove at the upper side of the front end of the main body frame 201, the front end of the lower plate is provided with two insertion plates, the rear ends of the upper plate and the lower plate are provided with coaxial and through circular holes, the upper end of the sixth handwheel 402 is a handwheel structure for manual operation and convenient rotation, the middle is a worm structure, the lower end is provided with an internal spline, the sixth handwheel 402 is installed in the circular holes at the rear ends of the upper plate and the lower plate at the rear end of the single-thread-head frame 401, the worm gear group 405 is installed between, which meshes with a worm structure in the middle of the sixth handwheel 402.

As shown in fig. 20 and 21, a variable diameter groove is formed in a cylindrical side surface of the third winding drum 403, the single-start steel wire 5 penetrating into the variable diameter groove can be smooth, the variable diameter groove can only accommodate the single steel wire to penetrate, a third wrench 404 is installed at a position close to the bottom end of the variable diameter groove, an eccentric wheel structure is arranged at the lower end of the third wrench 404, the single-start steel wire 5 penetrates into the variable diameter groove and passes through a gap between the eccentric wheel and the variable diameter groove, the third wrench 404 is pulled clockwise to enable the eccentric wheel structure to press the single-start steel wire 5, the third winding drum 403 is installed at the right side of the single-start rack 401, the third winding drum 403 and the single-start rack form a revolute pair, a bevel gear structure is arranged at the lower end of the third winding drum 403, and the bevel gear structure.

The embodiment of the invention comprises the following steps:

1) as shown in fig. 1 and 4, a connecting lug 101.1 at the lower end of the lifting inner arm 101 is fixed on the side surface of the operating table through a screw, so as to provide stable support for the posture adjusting mechanism 1, the first hand wheel 103 is rotated, and the worm structure at the rear end of the first hand wheel 103 drives the first worm wheel 122 to rotate, so that the rotation of the lateral moving outer arm 106 in the horizontal plane is realized.

As shown in fig. 5, after the cross bar at the left end of the shift lever 104 is pulled upwards, the shift plate 119 drives the traverse bevel gear 120 to move downwards to the limit position, under the thrust of the first spring 118, the internal spline structure at the lower end of the traverse bevel gear 120 is engaged with the external spline structure at the top end of the lifting screw 113, and the second hand wheel 105 is rotated, so that the torsional force can be transmitted to the lifting screw 113 through the traverse bevel gear 120, and the lifting screw 113 is rotated, thereby realizing the lifting action of the lifting outer arm 102, because the lifting screw 113 and the top end of the lifting inner arm 101 form a screw pair, and the screw pair has a self-locking property, after the second hand wheel 105 is loosened, the lifting screw 113 cannot rotate by itself due to the gravity, that is, the lifting outer arm 102 cannot descend by itself, and can only be driven by the second hand wheel 105.

As shown in fig. 6, after the cross bar at the left end of the shift lever 104 is pulled downward, the shift plate 119 drives the traverse bevel gear 120 to move upward to the limit position, the bevel gear structure at the upper end of the traverse bevel gear 120 meshes with the bevel gear structure at the left end of the traverse screw 114 under the thrust of the first spring 118, and the second hand wheel 105 is rotated, so that the traverse bevel gear 120 transmits the torsional force to the traverse screw 114 to rotate the traverse screw 114, thereby realizing the left-right telescopic movement of the traverse inner arm 107, because the traverse screw 114 and the left end of the traverse inner arm 107 form a screw pair, and the screw pair has a self-locking property, after the second hand wheel 105 is loosened, the traverse screw 114 does not rotate by itself due to the axial force, that is, the traverse inner arm 107 does not move by itself, and can only be driven by the second hand wheel 105.

As shown in fig. 4, when the third handwheel 112 is rotated, the torsional force is transmitted to the second worm wheel 115 through the worm structure at the rear end of the third handwheel 112, and the second worm wheel 115 is transmitted to the swing frame 109 through the pin 108, so that the swing frame 109 rotates around the vertical axis; when the fourth handwheel 111 is rotated, the torsional force is transmitted to the worm gear structure at the left end of the plugboard 110 through the worm structure at the rear end of the fourth handwheel 111, so that the plugboard 110 rotates around the horizontal shaft.

2) As shown in fig. 11 and 12, when the connecting mechanism 2 needs to be connected with the pose adjusting mechanism 1, the four insertion posts 110.1 on the insertion plate 110 only need to be inserted into the four circular holes formed on the bottom plate 202, and after the straight line edges of the four horseshoe-shaped openings on the clamping plate 203 are clamped into the hooks at the middle positions of the four insertion posts 110.1, the quick connection between the connecting mechanism 2 and the pose adjusting mechanism 1 is realized; when the connection between the connecting mechanism 2 and the pose adjusting mechanism 1 needs to be released, the connecting mechanism 2 and the pose adjusting mechanism 1 can be quickly released only by pressing the pressing plate at the rear end of the clamping plate 203, separating the straight edges of the four horseshoe-shaped holes from the hooks at the middle positions of the four insertion columns 110.1 and taking the connecting mechanism 2 away upwards.

As shown in fig. 11 and 12, when the double-wire-head tightening mechanism 3 needs to be connected with the connecting mechanism 2, first, the two insertion plates 301.1 at the front end of the lower plate of the double-wire-head rack 301 are correspondingly inserted into the two rectangular insertion holes 201.1 at the front end of the rectangular groove on the upper side of the main body rack 201, and then the rear end of the double-wire-head rack 301 is pressed downwards, so that the rear end of the lower plate of the double-wire-head rack 301 is pressed into the lower part of the inclined plane structure at the front end of the hook 208, and then the quick connection between the double-wire-head tightening mechanism 3 and; when the double-thread-end tightening mechanism 3 needs to be disconnected with the connecting mechanism 2, the button 205 is pressed downwards at first to enable the inclined plane structure at the front end of the hook 208 to retract into the hook cavity, then the rear end of the double-thread-end rack 301 is lifted upwards and the inserting plate 301.1 is pulled out of the inserting hole 201.1, and then the double-thread-end tightening mechanism 3 and the connecting mechanism 2 can be quickly disconnected; the manner and method of connecting and disconnecting the single thread take-up mechanism 4 to the connecting mechanism 2 is the same as the manner and method of connecting and disconnecting the double thread take-up mechanism 3 to the connecting mechanism 2.

3) As shown in fig. 13, 18, and 19, the double-thread tightening mechanism 3 can tighten the wire drawn from the double-thread wire and the wire drawn from the two single-thread wires.

Firstly, when the double-end steel wire 6 needs to be tightened, the screw 309 is screwed out from the threaded hole in the middle of the upper plate of the double-end machine frame 301, the screw 309 drives the sliding groove piece 308 to move forwards, meanwhile, the front ends of the left long rod 311 and the right long rod 316 are opened, and the screw 309 stops rotating after the left three guide wheels 313 and the right three guide wheels 314 reach a proper distance; then, the double-end steel wire 6 sequentially passes through the steel nails and is wound into a single ring shape, the left end 6.1 sequentially bypasses a left third guide wheel 313, a left second guide wheel 312 and a left first guide wheel 306, then penetrates into a variable-diameter groove arranged on the first reel 304 and passes through a gap between the eccentric wheel structure of the first wrench 303 and the variable-diameter groove, and then the first wrench 303 is pulled anticlockwise, so that the eccentric wheel structure of the first wrench 303 tightly presses the left end 6.1; the right thread end 6.2 sequentially bypasses the right three guide wheel 314, the right two guide wheel 315 and the right one guide wheel 319, penetrates into a diameter-variable groove arranged on the second winding drum 321, passes through a gap between the eccentric wheel structure of the second wrench 322 and the diameter-variable groove, and then is pulled clockwise by the second wrench 322, so that the eccentric wheel structure of the second wrench 322 compresses the right thread end 6.2;

the first locking knob 305 and the second locking knob 320 are rotated counterclockwise to move upwards without contacting with the upper plate of the dual-thread-head rack 301, then the fifth hand wheel 302 is rotated clockwise, the worm structure in the middle of the fifth hand wheel 302 transmits the torsion force to the second worm wheel 325, the second worm wheel 325 is rotated clockwise, the first planetary bevel gear 326 and the second planetary bevel gear 329 revolve around the axis of the second worm wheel 325 along with the second worm wheel 325, the left end bevel gear structure of the first bevel gear set 323 and the right end bevel gear structure of the second bevel gear set 328 engaged with the first planetary bevel gear 326 and the second planetary bevel gear 329 rotate clockwise, the bevel gear structure at the right end of the first bevel gear set 323 transmits the torsion force to the second winding drum 321 through the bevel gear structure at the lower end of the second winding drum 321, the second winding drum 321 rotates clockwise, the right thread head 6.2 is tightened, and the left end bevel gear structure of the second bevel gear set 328 transmits the torsion force to the first winding drum 321 through the bevel gear structure at the lower end of the first winding A winding drum 304, which makes the first winding drum 304 rotate anticlockwise and tightens the left thread end 6.1; the left thread end 6.1 and the right thread end 6.2 can be simultaneously loosened by rotating the fifth hand wheel 302 anticlockwise, and the tightening force of the double-thread steel wire 6 is adjusted by appropriately changing the rotating direction of the fifth hand wheel 302, so that the doctor can find the best effect of resetting the bone gap.

Because the worm gear and worm transmission is adopted between the fifth hand wheel 302 and the second worm gear 325, the transmission is smooth, the tightening force can be adjusted in a stepless manner, the rotating direction can be switched frequently, the tightening and loosening can be realized in time, and the self-locking function is realized, namely, the tightening and loosening of the double-end steel wire 6 can be controlled only by the fifth hand wheel 302, namely, the one-way transmission is realized, and the self-loosening condition can not occur after the double-end steel wire 6 is tightened.

Secondly, when the steel wire led out by two single-end wires needs to be tightened, the screw 309 is screwed out from the threaded hole in the middle of the upper plate of the double-end rack 301, the screw 309 drives the sliding groove piece 308 to move forwards, meanwhile, the front ends of the left long rod 311 and the right long rod 316 are opened, and the screw 309 stops rotating after the left three guide wheels 313 and the right three guide wheels 314 reach a proper distance; then, the first steel wire led out of the first steel wire passes through a variable-diameter groove arranged on the first winding drum 304 and passes through a gap between an eccentric wheel structure of the first wrench 303 and the variable-diameter groove by sequentially passing the first steel wire around a left third guide wheel 313, a left second guide wheel 312 and the left first guide wheel 306, and then the first wrench 303 is pulled anticlockwise to enable the eccentric wheel structure of the first wrench 303 to tightly press the first steel wire; the second wire drawn out of the third guide wheel sequentially bypasses the third right guide wheel 314, the second right guide wheel 315 and the first right guide wheel 319, penetrates into a diameter-variable groove arranged on the second winding drum 321, and is pulled clockwise by the second wrench 322 after passing through a gap between the eccentric wheel structure of the second wrench 322 and the diameter-variable groove, so that the eccentric wheel structure of the second wrench 322 compresses the second wire.

If the first steel wire is to be individually tightened, the first locking knob 305 is first rotated counterclockwise to move upward without contacting the upper plate of the twin-wire frame 301, the second locking knob 320 is then rotated clockwise to move downward and push against the upper plate of the twin-wire frame 301, and the rotation of the second reel 321 is locked, the rotation of the first bevel gear set 323 is also locked, and then the fifth hand wheel 302 is rotated clockwise to rotate the second worm gear 325 clockwise, since the first bevel gear set 323 cannot rotate and the bevel gear structure at the left end cannot rotate, the first and second planetary bevel gears 326 and 329 revolve around their axes along with the second worm gear 325, and also rotate around their axes, and the bevel gear structure at the right end of the gear set 328 engaged with the first and second planetary bevel gears 326 and 329 rotates clockwise, after the meshing transmission of the bevel gear structure at the left end of the second bevel gear set 328 and the bevel gear structure at the lower end of the first reel 304, the first reel 304 rotates anticlockwise, and the first steel wire is tightened; turning the fifth handwheel 302 counterclockwise allows for independent loosening of the first wire.

If the second steel wire needs to be separately tightened, the second locking knob 320 is firstly rotated counterclockwise to move upward without contacting with the upper plate of the double-end frame 301, then the first locking knob 305 is rotated clockwise to move downward and push against the upper plate of the double-end frame 301, and the rotation of the first winding drum 304 is locked, the rotation of the second bevel gear set 328 is also locked, then the fifth hand wheel 302 is rotated clockwise to rotate the second worm gear 325 clockwise, because the second bevel gear set 328 cannot rotate and the bevel gear structure at the right end cannot rotate, the first and second planetary bevel gears 326 and 329 revolve around the axes thereof along with the second worm gear 325, and simultaneously rotate around the axes thereof, and the bevel gear structure at the left end of the first bevel gear set 323 meshed with the first and second planetary bevel gears 326 and 329 rotates clockwise, after the meshing transmission of the bevel gear structure at the right end of the first bevel gear group 323 and the bevel gear structure at the lower end of the second winding drum 321 is carried out, the second winding drum 321 rotates clockwise, and the second steel wire is tightened; turning the fifth handwheel 302 counterclockwise effects a separate release of the second wire.

4) As shown in fig. 20 and 21, when the single-thread steel wire 5 needs to be tightened, the led-out single thread passes through a wire hole at the front end of the single-thread frame 401 and then penetrates into the variable-diameter groove on the third winding drum 403, until the single-thread steel wire 5 passes through a gap between the eccentric wheel and the variable-diameter groove, the third wrench 404 is wrenched clockwise, so that the eccentric wheel structure at the lower end of the third wrench 404 compresses the single-thread steel wire 5, the sixth hand wheel 402 is rotated clockwise, the worm wheel structure at the right end of the worm wheel group 405 engaged with the worm structure at the lower end of the sixth hand wheel 402 also rotates clockwise, the bevel gear structure at the lower end of the third winding drum 403 of the bevel gear structure at the left end of the worm wheel group 405 also rotates clockwise, and the third winding drum 403 rotates clockwise, so that the single-thread steel wire 5 is; the sixth handwheel 402 is rotated counterclockwise to loosen the single-start steel wire 5.

5) When the steel wire is required to be tightened in the operation, firstly, the double-wire-head tightening mechanism 3 or the single-wire-head tightening mechanism 4 is selected according to the number and the type of the led-out steel wire, and is installed on the connecting mechanism 2, and then the connecting mechanism 2 is installed on the plugboard 110; then, the second hand wheel 105 is rotated by matching with the gear shift lever 104, the first hand wheel 103, the third hand wheel 112 and the fourth hand wheel 111 are sequentially rotated, the double-wire-head tightening mechanism 3 or the single-wire-head tightening mechanism 4 is adjusted to a proper position and posture, and the steel wire can be tightened after the led-out steel wire is connected to the double-wire-head tightening mechanism 3 or the single-wire-head tightening mechanism 4.