阅读说明：本技术 一种肠胃肿瘤外科手术用腔内吻合器 (Intra-cavity anastomat for gastrointestinal tumor surgical operation ) 是由 杨言通 刘姗 于 2021-10-22 设计创作，主要内容包括：一种肠胃肿瘤外科手术用腔内吻合器,具有自动保险机构,自动保险机构包括沿固定手柄横向滑动设置的保险销,保险销位于固定手柄外部的外端用于与设置在击发手柄上的保险抵块抵触配合,所述丝杆具有大直径段和小直径段,大直径段用于与保险销位于固定手柄内的内端抵触配合以阻止击发手柄朝向固定手柄压合,小直径段供保险销的内端越过并解除对于击发手柄的阻挡。本发明大幅度降低操作者对于吻合器本身的操作关注度,利于操作者将注意力集中在手术本身。(The utility model provides a stomach tumour surgery is with intracavity anastomat, has automatic safety mechanism, and automatic safety mechanism includes the safety catch that sets up along fixed handle lateral sliding, and the safety catch is located the outside outer end of fixed handle and is used for supporting the piece with the insurance that sets up on the firing handle and contradict the cooperation, the lead screw has big diameter section and minor diameter section, and big diameter section is used for contradicting the cooperation with the inner that the safety catch is located fixed handle in order to prevent the firing handle towards fixed handle pressfitting, and the inner that minor diameter section supplied the safety catch is crossed and is relieved blockking to the firing handle. The invention greatly reduces the operation attention of the operator to the anastomat, and is beneficial to the operator to focus the attention on the operation.)

1. The utility model provides a stomach tumour is intracavity anastomat for surgery operation, including anastomat body (5), the front end of anastomat body (5) is equipped with to support the nail seat and cuts kiss the subassembly, the rear end of anastomat body (5) is equipped with fixed handle (3) and percussion handle (11), be equipped with in fixed handle (3) and extend to in anastomat body (5) and be used for controlling lead screw (1) that support the nail seat, percussion handle (11) hinge is on fixed handle (3) and is used for controlling to cut kiss the subassembly, its characterized in that:

also comprises an automatic safety mechanism which is used for preventing the firing handle (11) from being pressed to the fixed handle (3) when the nail abutting seat is in a non-inosculation position, and the nail pushing seat is driven to the anastomotic position by the screw rod (1) and then automatically releases the limit to the firing handle (11), the automatic safety mechanism is provided with a safety pin (9) which is arranged along the fixed handle (3) in a transverse sliding way, the outer end of the safety pin (9) which is positioned outside the fixed handle (3) is used for being in interference fit with a safety pushing block (8) which is arranged on the firing handle (11), the lead screw (1) has big diameter section (101) and minor diameter section (102), and big diameter section (101) are used for contradicting the cooperation in order to prevent firing handle (11) towards fixed handle (3) pressfitting with safety pin (9) the inner that is located fixed handle (3), and minor diameter section (102) supply the inner of safety pin (9) to cross and relieve the blockking to firing handle (11).

2. The endoluminal stapler for gastrointestinal tumour surgery according to claim 1, characterized in that: the automatic cutting and anastomat is characterized by further comprising an automatic locking mechanism (12) and an automatic unlocking mechanism (4), wherein the automatic locking mechanism (12) is used for automatically hooking and fixing the firing handle (11) on the fixed handle (3) after the firing handle (11) is pressed on the fixed handle (3) so as to keep the cutting and anastomat assembly to perform pressing hemostasis on notches on two sides, the automatic locking mechanism (12) comprises a fixed hook (1201) arranged on the firing handle (11) and a movable hook (1202) arranged on the fixed handle (3), and hook openings of the fixed hook (1201) and the movable hook (1202) are distributed oppositely;

the automatic unlocking mechanism (4) is used for triggering through pressing action of the firing handle (11) and automatically driving the moving hook (1202) to be separated from the fixed hook (1201) after time delay.

3. The endoluminal stapler for gastrointestinal tumour surgery according to claim 2, characterized in that: the fixed hook (1201) is fixed on the firing handle (11), the movable hook (1202) is provided with a strip-shaped hook handle, the middle part of the hook handle is hinged on the fixed handle (3), a first torsion spring is arranged at the hinged part, one end of the hook handle is positioned outside the fixed handle (3) and is provided with a hook body hooked with the fixed hook (1201), and the other end of the hook handle is positioned in the fixed handle (3) and forms an unlocking part (13);

the automatic unlocking mechanism (4) comprises a power shaft (411), an intermediate shaft (405) and an unlocking shaft (402) which are rotatably arranged in the fixed handle (3), the unlocking shaft (402) is provided with a shifting lever (401) and a first big gear (403), the shifting lever (401) is used for shifting the unlocking part (13) along with the rotation of the unlocking shaft (402), thereby driving the hook handle of the moving hook (1202) to rotate by taking a hinged point as a center and enabling the hook body of the moving hook (1202) to be separated from the fixed hook (1201), the first big gear (403) is meshed and connected with the first small gear (404) arranged on the middle shaft (405), the middle shaft (405) is also provided with a second big gear (406), the second big gear (406) is meshed and connected with a second small gear (410) arranged on the power shaft (411), the power shaft (411) is sleeved in a spring barrel (412), and an elastic spring for driving the power shaft (411) to rotate is arranged in the spring barrel (412); the power shaft (411) is further provided with a ratchet wheel (408), the fixed handle (3) is provided with a side cover (413) which is opened and closed through a buckle (407), the inner side of the side cover (413) is provided with a pawl (409) which is matched with the ratchet wheel (408) to block the release of the elastic spring, and the side cover (413) is pushed open by the inner end of the safety pin (9) in the pressing process of the firing handle (11) towards the fixed handle (3) to enable the pawl (409) to be separated from the ratchet wheel (408).

4. The endoluminal stapler for gastrointestinal tumour surgery according to claim 2, characterized in that: the fixed hook (1201) is fixed on the safety resisting block (8), the movable hook (1202) is fixed at the outer end of the safety pin (9), the unlocking part (13) is arranged at the inner end of the safety pin (9), a pin sleeve (10) for the sliding fit of the safety pin (9) is arranged in the fixed handle (3), and a spring pin (15) which can be in sliding fit in the pin sleeve (10) and is clamped on the pin sleeve (10) after extending out of the pin sleeve (10) is arranged in the safety pin (9);

the automatic unlocking mechanism (4) comprises a power shaft (411), an intermediate shaft (405) and an unlocking shaft (402) which are rotatably arranged in the fixed handle (3), the unlocking shaft (402) is provided with a shifting lever (401) and a first big gear (403), the shifting lever (401) is used for shifting the unlocking part (13) along with the rotation of the unlocking shaft (402), thereby driving the safety pin (9) to rotate so as to enable the movable hook (1202) to be separated from the fixed hook (1201), the first large gear (403) is meshed and connected with a first small gear (404) arranged on an intermediate shaft (405), a second large gear (406) is further arranged on the intermediate shaft (405), the second large gear (406) is meshed and connected with a second small gear (410) arranged on a power shaft (411), the power shaft (411) is sleeved in a spring barrel (412), and an elastic spring for driving the power shaft (411) to rotate is arranged in the spring barrel (412); a ratchet wheel (408) is also arranged on the power shaft (411), and a pawl (409) which is matched with the ratchet wheel (408) to block the release of the elastic spring is arranged at the inner end of the firing handle (11).

5. The endoluminal stapler for gastrointestinal tumour surgery according to claim 4, characterized in that: the outer end of the spring pin (15) is arc-shaped, a positioning sliding groove (14) through which the spring pin (15) penetrates is arranged in the pin sleeve (10), and the depth of the positioning sliding groove (14) is gradually reduced from the outer side to the inner side of the fixed handle (3).

6. The endoluminal stapler for gastrointestinal tumour surgery according to any one of claims 3 to 5, characterized in that: the first large gear (403) comprises a gear outer ring (19) rotatably sleeved on the unlocking shaft (402) and a star-shaped inner ring (20) fixed on the unlocking shaft (402), a plurality of inclined teeth (23) are arranged on the outer edge of the star-shaped inner ring (20), a plurality of C-shaped elastic pieces (18) are fixed on the inner edge of the gear outer ring (19), one end of each C-shaped elastic piece (18) is fixed with the gear outer ring (19), and the other end of each C-shaped elastic piece is in sliding fit with the tooth back (17) of each inclined tooth (23) and is in clamping fit with the tooth bottom (22) of each inclined tooth (23).

Technical Field

The invention relates to the field of gastrointestinal tumor surgical operation equipment, in particular to an intracavity anastomat for gastrointestinal tumor surgical operation.

Background

The use of the stapler brings great benefits to doctors and patients, improves the surgical technique and improves the quality of life of the patients. In the surgical field, staplers have been developed and advanced in a comprehensive way, not only to mechanize the surgical operation, but also to improve the safety of the surgical operation. The operation principle of various anastomats is similar to that of a stapler, namely, two or three rows of mutually staggered staples are arranged in tissues in a triggering mode to carry out cross stapling on the tissues, and all B-shaped stapling is carried out on the tissues.

The conventional anastomat generally comprises an anastomat body, wherein the front end of the anastomat body is a functional end and is provided with a nail abutting seat and a cutting and anastomosis assembly, and the rear end of the anastomat body is a control end and is provided with a fixing handle and a firing handle. The inside cavity of fixed handle is equipped with the lead screw that extends to in the anastomat body, and the one end of lead screw passes through the connection piece and links to each other with supporting the nail seat, and the other end spiro union sets up on the rotation cap of fixed handle afterbody in rotating, rotates the longitudinal movement of cap drive lead screw along the anastomat promptly through the rotation, adjusts then and supports the nail seat and cut the interval between the kiss subassembly. After the nail pushing seat is adjusted to be close to the cutting and anastomosis component, the percussion handle can be pressed to the fixed handle, and the incision and the compaction are carried out on the gastrointestinal tissue through the cutting and anastomosis component, and the suturing is completed by emitting the suture nail.

Existing staplers are typically disposable to avoid infection and the staples, once fired, cannot be loaded, and a safety mechanism is typically provided between the firing handle and the stationary handle. The safety mechanism blocks the triggering handle from pressing towards the fixed handle when the nail pushing seat is in a non-anastomosis position, and the nail pushing seat is adjusted by the screw rod to enter the anastomosis position and then taken down by an operator and the blocking of the triggering handle is removed. On the other hand, in gastrointestinal anastomosis, the pressing state of the firing handle is usually kept after firing, so that the cutting and anastomosis component and the nail abutting seat are matched and pressed on two sides of the incision for 15-20S to perform hemostasis operation. In specific use, an operator needs to keep attention to the pressing state of the trigger handle, the pressing force is kept uniform, and the pressing time cannot be too long or too short, so that the surgical process of the surgical anastomosis is more complicated, and the operator cannot timely handle sudden events in the operation.

Disclosure of Invention

The invention aims to provide an intracavity anastomat for gastrointestinal tumor surgical operation, which greatly reduces the operation attention of an operator to the anastomat and is beneficial to the operator to concentrate the attention on the operation.

In order to solve the technical problems, the invention adopts the specific scheme that: an intracavity anastomat for gastrointestinal tumor surgical operation comprises an anastomat body, wherein a nail abutting seat and a cutting and anastomosis assembly are arranged at the front end of the anastomat body, a fixed handle and a trigger handle are arranged at the rear end of the anastomat body, a lead screw which extends into the anastomat body and is used for controlling the nail abutting seat is arranged in the fixed handle, the trigger handle is hinged to the fixed handle and is used for controlling the cutting and anastomosis assembly, the intracavity anastomat further comprises an automatic safety mechanism, the automatic safety mechanism is used for blocking the trigger handle from being pressed to the fixed handle when the nail abutting seat is in a non-anastomosis position and automatically releasing the limit of the trigger handle after the nail abutting seat is driven to the anastomosis position through the lead screw, the automatic safety mechanism is provided with a safety pin which is arranged along the fixed handle in a transverse sliding mode, the outer end, which is positioned outside the fixed handle, of the safety pin is used for being in abutting fit with a safety block arranged on the trigger handle, and the lead screw is provided with a large-diameter section and a small-diameter section, the big diameter section is used for conflicting the cooperation in order to prevent the fixed handle pressfitting of percussion handle orientation with the inner that the safety pin is located fixed handle, and the inner that the small diameter section confession safety pin supplies the safety pin crosses and removes the blockking to the percussion handle.

Preferably, the automatic locking device further comprises an automatic locking mechanism and an automatic unlocking mechanism, the automatic locking mechanism is used for automatically hooking and fixing the trigger handle on the fixed handle after the trigger handle is pressed on the fixed handle so as to keep the cutting and anastomosis component in pressing and hemostasis action on the notches at two sides, the automatic locking mechanism comprises a fixed hook arranged on the trigger handle and a movable hook arranged on the fixed handle, and hook openings of the fixed hook and the movable hook are distributed relatively;

the automatic unlocking mechanism is used for triggering through pressing action of the trigger handle and automatically driving the movable hook to be separated from the fixed hook after time delay.

Preferably, the fixed hook is fixed on the firing handle, the movable hook is provided with a strip-shaped hook handle, the middle part of the hook handle is hinged on the fixed handle, a first torsion spring is arranged at the hinged part, one end of the hook handle is positioned outside the fixed handle and is provided with a hook body hooked with the fixed hook, and the other end of the hook handle is positioned in the fixed handle and forms an unlocking part;

the automatic unlocking mechanism comprises a power shaft, an intermediate shaft and an unlocking shaft which are rotatably arranged in the fixed handle, wherein the unlocking shaft is provided with a shifting lever and a first large gear, the shifting lever is used for shifting the unlocking part along with the rotation of the unlocking shaft, so that a hook handle of the movable hook is driven to rotate by taking a hinged point as a center and a hook body of the movable hook is separated from the fixed hook, the first large gear is meshed with a first small gear arranged on the intermediate shaft, the intermediate shaft is also provided with a second large gear, the second large gear is meshed with a second small gear arranged on the power shaft, the power shaft is sleeved in a spring box, and an elastic spring for driving the power shaft to rotate is arranged in the spring box; the power shaft is further provided with a ratchet wheel, the fixed handle is provided with a side cover which is opened and closed through a buckle, the inner side of the side cover is provided with a pawl which is matched with the ratchet wheel to block the release of the elastic spring, and the side cover is pushed open by the inner end of the safety pin in the pressing process of the percussion handle towards the fixed handle so that the pawl is separated from the ratchet wheel.

Preferably, the fixed hook is fixed on the safety abutting block, the movable hook is fixed at the outer end of the safety pin, the unlocking part is arranged at the inner end of the safety pin, a pin sleeve for the safety pin to be in sliding fit is arranged in the fixed handle, and a spring pin which can be in sliding fit in the pin sleeve and is clamped on the pin sleeve after extending out of the pin sleeve is arranged in the safety pin;

the automatic unlocking mechanism comprises a power shaft, an intermediate shaft and an unlocking shaft, wherein the power shaft, the intermediate shaft and the unlocking shaft are rotatably arranged in the fixed handle, the unlocking shaft is provided with a shifting lever and a first large gear, the shifting lever is used for shifting the unlocking part along with the rotation of the unlocking shaft so as to drive the safety pin to rotate to enable the movable hook to be separated from the fixed hook, the first large gear is meshed with a first small gear arranged on the intermediate shaft, the intermediate shaft is also provided with a second large gear, the second large gear is meshed with a second small gear arranged on the power shaft, the power shaft is sleeved in a spring box, and an elastic spring for driving the power shaft to rotate is arranged in the spring box; the power shaft is also provided with a ratchet wheel, and the inner end of the firing handle is provided with a pawl which is matched with the ratchet wheel to block the release of the elastic spring.

Preferably, the outer end of the spring pin is arc-shaped, a positioning sliding groove for the spring pin to penetrate through is formed in the pin sleeve, and the depth of the positioning sliding groove is gradually reduced from the outer side to the inner side of the fixed handle.

Preferably, the first gearwheel comprises a gear outer ring rotatably sleeved on the unlocking shaft and a star-shaped inner ring fixed on the unlocking shaft, a plurality of inclined teeth are arranged on the outer edge of the star-shaped inner ring, a plurality of C-shaped elastic pieces are fixed on the inner edge of the gear outer ring, one end of each C-shaped elastic piece is fixed with the gear outer ring, and the other end of each C-shaped elastic piece is in sliding fit with the tooth back of each inclined tooth and is in clamping fit with the tooth bottom of each inclined tooth.

Advantageous effects

The safety pin is arranged on the fixed handle in a sliding mode, and a lead screw in the fixed handle is provided with a large-diameter section and a small-diameter section. Because the position of propping the nail seat is by lead screw drive, so set up the length of big diameter section and minor diameter section into to contradict on big diameter section as propping the inner conflict of safety catch when the nail seat is located non-anastomotic position, with block the pressfitting of percussion handle through lead screw self, and after the lead screw removed and drive and prop the nail seat and get into anastomotic position, big diameter section breaks away from and can cross minor diameter section with the safety catch inner promptly, make the lead screw lose the spacing effect of contradicting to the safety catch, make the percussion handle get into the state of can percussion, thereby the accessible is propped the conflict state of nail seat position automatic adjustment safety catch, and then need not operator's initiative operation, the loaded down with trivial details degree that the anastomat used has been reduced.

In a preferred embodiment of the invention, an automatic locking mechanism and an automatic unlocking mechanism are also included. Can link to each other the two automation behind percussion handle pressfitting to fixed handle through automatic locking mechanism, keep cutting kiss subassembly to the hemostasis by compression state of organizing the incision position, avoid the operator to continuously grip the complicated operation of percussion handle on the one hand, on the other hand oppresses the tissue with comparatively stable dynamics, does benefit to the hemostasis. Can relieve the hooking state of trigger handle and fixed handle automatically after the hemostasis specific time is strikeed and oppressed to the staple through automatic release mechanism for the trigger handle resets under the elasticity effect of self second torsional spring and in order to relieve the oppression effect of kiss subassembly, need not the operator and takes notes hemostasis time, makes it further concentrate on operation process itself with attention, does benefit to the incident that in-time processing operation in-process produced.

Drawings

Fig. 1 is a schematic cross-sectional structural view of a tail portion of a stapler body in a state where a staple abutting seat does not enter a stapling position according to embodiment 1 of the present invention;

FIG. 2 is a schematic view of the nail pushing seat in FIG. 1 after the nail pushing seat is driven by the screw rod to enter the anastomosis position and the firing handle is pressed towards the fixed handle;

fig. 3 and 4 are schematic cross-sectional structural views of the tail part of the stapler body in a state that the staple abutting seat does not enter the stapling position according to embodiment 2 of the invention;

FIG. 5 is a schematic sectional view taken along line A-A in FIG. 4;

FIG. 6 is a schematic view of the nail pushing seat in FIG. 3 after the nail pushing seat is driven by the screw rod to enter the anastomosis position and the firing handle is pressed towards the fixed handle;

FIG. 7 is a schematic sectional view taken along line B-B in FIG. 6;

FIGS. 8 to 10 are schematic views showing the state change processes of the safety pin of embodiment 2 from FIGS. 3 to 7;

fig. 11 and 12 are schematic views showing the assembly between the unlocking shaft and the first large gear in embodiment 3 of the present invention;

the labels in the figure are: 1. a screw rod, 101, a large-diameter section, 102, a small-diameter section, 2, a rotating cap, 3, a fixed handle, 4, an automatic unlocking mechanism, 401, a driving lever, 402, an unlocking shaft, 403, a first gearwheel, 404, a first pinion, 405, an intermediate shaft, 406, a second gearwheel, 407, a buckle, 408, a ratchet, 409, a pawl, 410, a second pinion, 411, a power shaft, 412, a spring barrel, 413, a side cover, 414, an intermediate rod, 5, an anastomat body, 6, a second articulated shaft, 7, a second torsion spring, 8, a safety resisting block, 9, a safety pin, 10, a pin sleeve, 11, a firing handle, 12, an automatic locking mechanism, 1201, a fixed hook, 1202, a moving hook, 13, an unlocking part, 14, a positioning chute, 15, a spring pin, 16, a linear spring, 17, a tooth back part, 18, a C-shaped elastic sheet, 19, a gear outer ring, 20, a star-shaped inner ring, 21, a rib plate, 22, a star-shaped inner ring, a gear outer ring, a gear plate, a gear back plate, a movable hook, a, Tooth bottom, 23, deflecting teeth.

Detailed Description

As shown in fig. 1 and 3, the present invention provides an intraluminal anastomat for gastrointestinal tumor surgery, which is used for intestinal tract incision anastomosis, and has the same basic structure as the existing elbow anastomat, and both comprise an anastomat body 5. The front end of the stapler body 5 is an executing end, and is provided with a nail abutting seat and a cutting and anastomosis component (in the prior art, not shown). The nail pushing seat is detachably connected to the anastomat body 5, and the distance between the nail pushing seat and the cutting and anastomosis assembly can be adjusted through the anastomat body 5 after the nail pushing seat is connected to the anastomat assembly; the cutting and anastomosis component is provided with a suture nail triggering piece, a cutter and a pressing ring and is also driven by a control part arranged at the rear end of the anastomat body 5. The rear end of the anastomat body 5 is a control end, the control end is directly connected with a fixed handle 3, and a firing handle 11 is hinged on the fixed handle 3. The fixed handle 3 has the inner chamber the same with the anastomat body 5, is equipped with along longitudinal distribution's lead screw 1 in the inner chamber, and the right-hand member spiro union of lead screw 1 is rotating and is setting up in the rotation cap 2 of control handle right-hand member, the left end pass through the connection piece with it links to each other to support the nail seat to the accessible positive reverse rotation rotates cap 2 and follows longitudinal movement with drive lead screw 1 to drive and support the nail seat along longitudinal movement, realize adjusting and support the nail seat and cut the mesh of the distance between the kiss subassembly. The trigger handle 11 is substantially L-shaped, the inflection point of the trigger handle is hinged to the housing of the fixed handle 3 through the second hinge shaft 6, the second torsion spring 7 is sleeved at the second hinge shaft 6, and two ends of the second torsion spring 7 respectively abut against the trigger handle 11 and the housing of the stapler body 5, so that the trigger handle 11 is in the initial state shown in fig. 1 and 3 under the action of the second torsion spring 7. In an initial state, the long edge of the firing handle 11 is inclined to the fixed handle 3 and distributed for an operator to hold and press towards the fixed handle 3; the short edge of the firing handle 11 is distributed in the anastomat body 5, and the operator rotates along the anticlockwise direction by taking the second hinged shaft as the center in the process of pressing the firing handle 11, so that the pressing cutter cuts off the edge of the tissue, the pressing ring presses the edge of the tissue and the firing assembly fires the staple to suture the tissue incision through the staple.

In addition, the invention also comprises a safety mechanism which is used for blocking the firing handle 11 for pressing when the nail pushing seat does not enter the anastomosis position, so that the disposable nail is prevented from being accidentally fired. Different from the conventional anastomat, the safety mechanism is an automatic safety mechanism, an operator does not need to manually take off the safety after adjusting the position of the nail abutting seat, the safety mechanism automatically contacts the limit stop of the firing handle 11 after adjusting the nail abutting seat to the anastomosis position through the lead screw, and the complexity of operation is reduced.

In order to achieve the technical effects, the automatic safety mechanism main body of the invention comprises a safety pin 9 arranged below the shell of the fixed handle 3 in a sliding way and a pin sleeve 10 which is fixed on the fixed handle 3 and is used for sliding the safety pin 9. The lower end of the safety pin 9 extends out of the fixed handle 3 and abuts against a safety base arranged at the position, close to the inflection point, of the triggering handle 11, and the upper end of the safety pin 9 is distributed in the inner cavity of the fixed handle 3 and matched with the lead screw. The lead screw has the small diameter section 102 that is located the left side and is located the big diameter section 101 on right side, and under the initial condition that fig. 1 and 3 show, the upper end is conflicted in the lower limb of big diameter section 101, and safety pin 9 forms the spacing that blocks of percussion handle 11 this moment, avoids percussion handle 11 anticlockwise rotation. And after the screw rod is driven to move rightwards by rotating the rotating cap 2 so as to move the nail pushing seat to the anastomosis position towards the cutting and anastomosis assembly, the upper end of the safety pin 9 is separated from the left end of the large-diameter section 101 and goes over the small-diameter section 102, so that the limit blockage of the firing handle 11 is removed, the firing handle can be pressed towards the fixed handle 3 under the holding external force action of an operator, and then the nail is fired. Because the position of supporting the seat of the nail is driven by the lead screw, so set up the length of large diameter section 101 and small diameter section 102 as supporting the seat of the nail and being located the inner conflict of safety catch 9 on large diameter section 101 when not coinciding the position, in order to block the stitching of the percussion handle 11 through the lead screw self, and after the lead screw moves and drives and supports the seat of the nail and enter and coincide the position, large diameter section 101 breaks away from and can cross small diameter section 102 with safety catch 9 inner promptly, make the lead screw lose the conflict limiting displacement to safety catch 9, make percussion handle 11 enter and can fire the state

As shown in fig. 5 and 7, the safety pin 9 has a U-shaped groove at an upper end thereof, and a width of a notch of the U-shaped groove is smaller than the large-diameter portion 101 and larger than the small-diameter portion 102. Under the state as shown in fig. 5, the upper end of the safety pin 9 is guaranteed to abut against the lower edge of the large-diameter section 101 to achieve stopping and limiting of the trigger handle 11, as shown in fig. 7, after the screw rod moves rightwards to enable the small-diameter section 102 to correspond to the safety pin 9 vertically, the upper end of the safety pin 9 can penetrate through the small-diameter section 102 through the U-shaped groove, the ascending stroke amplitude of the safety pin 9 is not limited to the fall between the large-diameter section 101 and the small-diameter section 102, on one hand, the trigger handle 11 still has a large rotating amplitude to ensure triggering, on the other hand, the upper end of the safety pin 9 can serve as a trigger for subsequent functional effects, and multiple purposes are achieved.

On the basis of the automatic safety mechanism, the automatic hemostatic forceps are further provided with an automatic locking mechanism 12 and an automatic unlocking mechanism 4, and the automatic control of the force and time of compression hemostasis after anastomosis is cut is realized through the automatic locking mechanism 12 and the automatic unlocking mechanism 4. The automatic locking mechanism 12 comprises a fixed hook 1201 arranged on the firing handle 11 and a movable hook 1202 arranged on the fixed handle 3, the hook openings of the fixed hook 1201 and the movable hook 1202 are distributed oppositely, and the automatic locking mechanism 12 is used for automatically hooking and fixing the firing handle 11 on the fixed handle 3 after the firing handle 11 is pressed on the fixed handle 3, so that the pressing hemostasis effect of the cutting and anastomosis component on the two side openings is kept with stable force. The automatic unlocking mechanism 4 has a time-delay action function, can be triggered by the pressing action of the firing handle 11, and drives the movable hook 1202 to move to separate from the fixed hook 1201 after 15-20 seconds, so that the firing handle 11 automatically resets under the action of the second torsion spring 7, further the oppression on the incision part is relieved, and the oppression time is prevented from being too long or too short.

The automatic locking mechanism 12 and the automatic unlocking mechanism 4 are functionally and structurally closely related, and the automatic locking mechanism 12 and the automatic unlocking mechanism 4 are described in detail below by three embodiments:

example 1

The fixed hook 1201 is fixed at a position inside the middle of the firing handle 11 in the present embodiment as shown in fig. 1, and the hook opening is distributed leftward. The movable hook 1202 has a longer hook handle, the middle of the hook handle is hinged to the lower edge of the housing of the fixed handle 3 through a first hinge shaft, a hook body facing the right side is arranged at the lower end of the hook handle after the lower end of the hook handle extends out of the fixed handle 3, and the upper end of the hook handle is positioned in the inner cavity of the fixed handle 3 and forms an unlocking part 13. A first torsion spring is wound around the first hinge shaft, and both ends of the first torsion spring are respectively engaged with the hook handle and the fixed handle 3 to maintain the movable hook 1202 in the initial state shown in fig. 1 by the first torsion spring. In the initial state, the position of the firing handle 11 is fixed by pressing the firing handle 11 to the fixed handle 3, i.e., by hooking the fixed hook 1201 and the movable hook 1202 to each other. When the fixed hook 1201 and the movable hook 1202 need to be released, the automatic unlocking mechanism 4 rotates the unlocking part 13 clockwise, that is, the movable hook 1202 is driven to move in a rotating manner and disengage from the fixed hook 1201.

The automatic unlocking mechanism 4 in this embodiment includes a power shaft 411, an intermediate shaft 405, and an unlocking shaft 402, which are rotatably provided in the fixed handle 3 from right to left in this order and located above the lead screw 1. The rightmost unlocking shaft 402 is provided with a shifting lever 401 and a first large gear 403, the shifting lever 401 coincides with the unlocking part 13 along with the rotation track of the unlocking shaft 402, so that the shifting lever 401 shifts the unlocking part 13 when rotating synchronously along with the counterclockwise rotation of the unlocking shaft 402, and the movable hook 1202 is driven to be separated from the fixed hook 1201. The first gearwheel 403 is engaged with a first pinion 404 arranged on an intermediate shaft 405, a second gearwheel 406 is further arranged on the intermediate shaft 405, the second gearwheel 406 is engaged with a second pinion 410 arranged on a power shaft 411, the power shaft 411 is sleeved in a barrel 412, and an elastic spring for driving the power shaft 411 to rotate is arranged in the barrel 412. The elastic spring is compressed and locked, and releases elastic potential energy to drive the power shaft 411 to rotate after the locked state is released by the pressing action of the firing handle 11. Then, the second small gear 410 on the power shaft 411 drives the second large gear 406 on the intermediate shaft 405 to rotate, thereby driving the intermediate shaft 405 and the first small gear 404 to rotate. The first small gear 404 drives the first large gear 403 to rotate, and finally the first large gear 403 drives the unlocking shaft 402 and the shift lever 401 on the unlocking shaft 402 to rotate. Through the transmission structure of the big pinion in the embodiment, the angular speed of the power shaft 411 which is driven by the elastic spring and rotates at a higher speed drives the unlocking shaft 402 to rotate slowly after being decelerated for two stages, the initial position of the shift lever 401 is arranged on the right side of the unlocking part 13, and the shift lever 401 rotates anticlockwise for 360 degrees and then contacts with the unlocking part 13 to push the unlocking part 13 to rotate, so that under two factors of slowing down the rotation of the unlocking shaft 402 and increasing the stroke of the shift lever 401 from the initial position to the action position, the unlocking part 13 can conveniently achieve the time delay action effect of rotating and unhooking after being pressed by the firing handle 11 for about 15-20 seconds.

In order to achieve the effect of releasing potential energy by driving the spring after the firing handle 11 is pressed, the above-mentioned locking state is performed by the ratchet 408-pawl 409 system, and the pawl 409 is driven to disengage from the ratchet 408 by the pressing action of the firing handle 11 to release the locking state, so that the spring starts to release potential energy, specifically:

the ratchet 408 is arranged on the power shaft 411, and the pawl 409 is arranged at the position corresponding to the upper part of the ratchet 408 inside the shell of the fixed handle 3 and is matched with the ratchet on the ratchet 408 in a clamping way. The position of the shell of the fixed handle 3 corresponding to the pawl 409 is a side cover 413 which can be opened and closed. The side cover 413 is strip-shaped, the left end of the side cover is hinged with the shell of the fixed handle 3, the right side of the side cover is in clamping fit with the fixed handle 3 through a buckle 407, and the clamping force of the buckle 407 maintains the clamping state of the pawl 409 on the ratchet 408. The side cover 413 is arranged right above the safety pin 9, an intermediate rod 414 is arranged between the side cover 413 and the safety pin 9 in a sliding mode, the intermediate rod 414 is lifted by the upper end of the safety pin 9 in the pressing process of the firing handle 11 towards the fixed handle 3 and overcomes the clamping force of the buckle 407 to open the side cover 413, the pawl 409 ascends synchronously along with the side cover 413 to release the clamping on the ratchet 408, and the elastic spring starts to release potential energy.

The specific implementation of this example is as follows:

the rotating cap 2 is rotated in the state shown in fig. 1, and the screw rod is driven to move left to adjust the nail abutting seat to the inosculating position. The safety pin 9 is staggered rightwards at the large-diameter section 101 after the anastomosis position, and the U-shaped groove at the upper end of the safety pin 9 is opposite to the small-diameter section 102. At this time, the safety is relieved, and the percussion can be carried out at any time.

As shown in FIG. 2, after the operator holds the fixed handle 3 and pulls the trigger handle 11, on one hand, the fixed hook 1201 and the movable hook 1202 are hooked to each other to lock the position of the trigger handle 11, so that the second torsion spring 7 is in a compressed state to complete incision, staple firing and compression hemostasis for the operation site. On the other hand, the safety block 8 pushes the safety pin 9 to rise, and the U-shaped groove at the upper end of the safety pin 9 passes through the small diameter section 102 to push the middle rod 414 to rise, so that the upper end of the middle rod 414 pushes the side cover 413 open, and the pawl 409 is also disengaged from the ratchet 408. The elastic spring in a compressed state starts to release elastic potential energy and drives the power shaft 411 to rotate rapidly, the torque of the power shaft 411 is subjected to two-stage speed reduction and amplification and then is transmitted to the unlocking shaft 402, the unlocking shaft 402 drives the shifting rod 401 to rotate slowly in the anticlockwise direction, the shifting rod rotates for nearly 360 degrees in the state shown in fig. 2, then contacts the unlocking part 13 and shifts the unlocking part 13 to rotate, and the movable hook 1202 integrally rotates and is separated from the fixed hook 1201 after 15-20 seconds after the unlocking. After the fixed hook 1201 is separated from the movable hook 1202, the firing handle 11 is reset by the elastic force of the second torsion spring 7, thereby avoiding pressing the incision part for an excessively long time.

Example 2

As shown in fig. 3, the fixing hook 1201 of the automatic locking mechanism in this embodiment is fixed on the safety block 8, and the moving hook 1202 is fixed on the outer end of the safety pin 9, and the hook openings of the two hooks are arranged oppositely, so as to lock the position of the firing handle 11 after the firing handle 11 is pressed on the fixing handle 3. Since the safety pin 9 has a degree of freedom of sliding in both directions in the vertical direction, in order to enable the movable hook 1202 to be hooked with the fixed hook 1201 and enable the fixed pin to keep the vertical position unchanged after hooking, the embodiment has the following two limits: firstly, the depth of the U-shaped groove at the upper end of the safety pin 9 is limited, so that the bottom of the U-shaped groove just props against the small-diameter section 102 after the trigger handle 11 is completely pressed on the fixed handle 3, the upward sliding stroke of the safety pin 9 is stopped at the moment, and the movable hook 1202 and the fixed hook 1201 deform and hook in the mutual extrusion process. Next, as shown in fig. 8-10, a plurality of pin holes distributed along the radial direction are formed on the safety pin 9 along the circumferential direction thereof, a spring pin 15 and a linear spring 16 for pushing the spring pin 15 outward are disposed in the pin holes, a positioning chute 14 for slidably engaging each spring pin 15 is correspondingly formed inside the pin sleeve 10, and the depth of the positioning chute 14 is gradually reduced along the direction from bottom to top. The spring pin 15 moves from the lower part of the pin sleeve 10 to the upper part of the pin sleeve 10 in the process of jacking the safety pin 9 by the safety resisting block 8 through the cooperation of the spring pin 15 and the positioning sliding groove 14, the spring pin 15 shown in fig. 10 extends out of the pin sleeve 10 and is clamped on the upper edge of the pin sleeve 10 under the action of the linear spring 16 after being exposed out of the pin sleeve 10, and the downward sliding forming of the safety pin 9 is blocked, so that the hooking state of the fixed hook 1201 and the moving hook 1202 is maintained. In order to ensure that the spring catch 15 can smoothly enter the guide runner, the upper part of the spring catch 15 in this embodiment is in the shape of a smooth circular arc.

The automatic unlocking mechanism 4 of the present embodiment is basically the same as embodiment 1, and the differences are two: firstly, the ratchet 408 on the power shaft 411 in the embodiment is blocked by the pawl 409 arranged at the inner end of the firing handle 11, and the ratchet is contacted and blocked after the firing handle 11 is pulled; secondly, the upper end of the safety pin 9 is provided with a straight rod to form an unlocking part 13, and the shifting rod 401 on the unlocking shaft 402 drives the safety pin 9 to rotate by shifting the straight rod, so that the movable hook 1202 rotates to be separated from the fixed hook 1201.

The specific implementation of this example is as follows:

the rotating cap 2 is rotated in the state shown in fig. 3, and the screw rod is driven to move left to adjust the nail abutting seat to the inosculating position. The safety pin 9 is staggered rightwards at the large-diameter section 101 after the anastomosis position, and the U-shaped groove at the upper end of the safety pin 9 is opposite to the small-diameter section 102. At this time, the safety is relieved, and the percussion can be carried out at any time. The relative position of the upper end of the safety pin 9 and the shift lever 401 in the automatic unlocking mechanism 4 at this time is shown in fig. 5.

As shown in FIG. 6, after the operator holds the fixed handle 3 and pulls the trigger handle 11, on one hand, the fixed hook 1201 and the movable hook 1202 are hooked to each other to lock the position of the trigger handle 11, so that the second torsion spring 7 is in a compressed state to complete incision, staple firing and compression hemostasis for the operation site. On the other hand, the pawl 409 at the inner end of the firing handle 11 is disengaged from the ratchet 408, the compressed elastic spring starts to release elastic potential energy and drives the power shaft 411 to rotate quickly, the torque of the power shaft 411 is subjected to two-stage deceleration and amplification and then is transmitted to the unlocking shaft 402, the unlocking shaft 402 drives the shift lever 401 to rotate slowly in the clockwise direction, the shift lever rotates by 360 degrees in the state shown in fig. 6, contacts the unlocking part 13 and shifts the unlocking part 13 to rotate, and the safety pin 9 rotates integrally and the moving hook 1202 is disengaged from the fixed hook 1201 about 15-20 seconds after firing. After the fixed hook 1201 is separated from the movable hook 1202, the firing handle 11 is reset by the elastic force of the second torsion spring 7, thereby avoiding pressing the incision part for an excessively long time.

Example 3

The main structure of this embodiment is the same as that of embodiment 1 or 2. Since the elastic spring in the embodiment 1 and the embodiment 2 needs to be assembled in the spring barrel 412 in a compressed state, in order to avoid aging of the elastic spring and reduce assembly difficulty caused by long-term storage of the anastomat, the power shaft 411 in the embodiment extends out of the shell of the fixed handle 3 and then is connected with the handle, and due to the one-way clamping effect of the pawl 409, an operator can compress the elastic spring by twisting the power shaft 411 before anastomosis so as to accumulate elastic potential energy.

In the process of releasing the elastic spring in the embodiments 1 and 2, the shift levers 401 rotate by nearly 360 degrees and then contact the corresponding unlocking portions 13, and finally drive the unlocking portions 13 to rotate, so that the time delay effect is realized. In order to avoid the initial position of the shift lever 401 and the unlocking portion 13 being changed in a linkage manner during the compression of the spring, the unlocking shaft 402 and the first large gear 403 on the unlocking shaft are matched in a one-way torque transmission manner:

as shown in fig. 11, the first large gear 403 includes an outer gear ring 19 rotatably fitted over the unlocking shaft 402 and an inner star ring 20 fixed to the unlocking shaft 402. Three rib plates 21 distributed towards the circle center of the gear are arranged on the inner edge of the outer ring 19 of the gear, and the rib plates 21 surround a clearance for the unlocking rotation to be in running fit after being converged at the circle center position. Six inclined teeth 23 are arranged on the outer edge of the star-shaped inner ring 20, and C-shaped elastic sheets 18 are respectively arranged on the rib plates 21. The openings of the C-shaped elastic sheets 18 are distributed towards the direction corresponding to the rib plates 21, one ends of the C-shaped elastic sheets are fixed with the rib plates 21, and the other ends of the C-shaped elastic sheets are in sliding fit with the tooth back parts 17 of the inclined teeth 23 and are in clamping fit with the tooth bottom parts 22 of the inclined teeth 23. In the state shown in fig. 11, the C-shaped spring 18 is slidably engaged with the back of the deflecting tooth 23, and when the outer ring 19 rotates clockwise in a state that the operator compresses the spring by rotating the power shaft 411, the outer ring 19 cannot rotate the unlocking shaft 402, and the position of the shift lever 401 cannot be changed. When the elastic spring is released to rotate the power shaft 411 in the opposite direction so as to drive the outer ring 19 of the gear to rotate in the counterclockwise direction, the C-shaped elastic piece 18 slides to the bottom position of the deflection teeth 23 as shown in fig. 12 and reaches the clamping state, that is, the outer ring 19 of the gear drives the unlocking shaft 402 and the shift lever 401 on the unlocking shaft 402 to rotate in the counterclockwise direction.

Since the unlocking shafts 402 in the embodiments 1 and 2 unlock by pushing the corresponding unlocking parts 13 in opposite rotation directions, the above-mentioned one-way transmission torque fit between the first large gear 403 and the unlocking shaft 402 is only suitable for the embodiment 2, and can be suitable for the embodiment 1 after mirror image inversion.

The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.