阅读说明：本技术 一种用于脊柱的拉伸和压缩装置 (Stretching and compressing device for spine ) 是由 刘立岷 丰干钧 杨曦 朱策 王珏翰 宋跃明 李方财 于 2021-09-17 设计创作，主要内容包括：本发明公开一种用于脊柱的拉伸和压缩装置,包括伸缩组件、调节组件；伸缩组件包括连杆、调节杆、滑动部,调节杆在连杆内部滑动,调节组件由两根滑动梁组成,滑动梁之间角度可调,伸缩组件通过滑动部套设在调节组件上,通过齿轮与滑动梁的配合进行相对运动。本发明设置可多点拉伸或压缩,同步调节多个钉棒固定系统；设置多段式滑动梁,拉伸或压缩时既可以控制每个固定点的拉伸度或压缩度,还可以矫正固定点之间的角度,使用范围广；设置定向轮,既可以控制齿轮运动方向,又可以固定齿轮,保证伸缩结构的稳定性；与金属连接棒可转动连接,保证灵活性。(The invention discloses a stretching and compressing device for a spine, which comprises a telescopic component and an adjusting component, wherein the telescopic component is arranged on the telescopic component; the telescopic assembly comprises a connecting rod, an adjusting rod and a sliding part, the adjusting rod slides inside the connecting rod, the adjusting assembly is composed of two sliding beams, the angle between the sliding beams is adjustable, the telescopic assembly is sleeved on the adjusting assembly through the sliding part, and relative movement is carried out through the matching of a gear and the sliding beams. The invention is provided with a plurality of nail rod fixing systems which can be stretched or compressed at multiple points and synchronously adjusted; the multi-section sliding beam is arranged, so that the stretching degree or the compression degree of each fixed point can be controlled during stretching or compressing, the angle between the fixed points can be corrected, and the application range is wide; the directional wheel is arranged, so that the movement direction of the gear can be controlled, the gear can be fixed, and the stability of the telescopic structure is ensured; and the metal connecting rod can be rotationally connected, so that the flexibility is ensured.)

1. A stretching and compressing device for the spine, characterized in that: comprises a telescopic component and an adjusting component;

the telescopic assembly comprises a fixing part and a moving part, the fixing part comprises a connecting rod (1) and an adjusting rod (2), the connecting rod (1) is hollow, the adjusting rod (2) is movably arranged in the connecting rod (1) and can slide in the connecting rod (1), the lower end of the adjusting rod (2) is connected with a fixing ring (3), the moving part comprises a sliding part (4), a gear (12) and an adjusting head (11), a square through hole is formed in the sliding part (4), a groove (10) is formed in one surface of the sliding part, the gear (12) is installed in the groove (10) through a shaft, the adjusting head (11) is movably connected with a central shaft of the gear (12), and the upper end of the connecting rod (1) is connected to the sliding part (4);

the adjusting assembly comprises two sliding beams (6), one end of each sliding beam (6) is provided with a shaft sleeve (7), a pin shaft (8) penetrates through the shaft sleeves to connect the two sliding beams together, the number of the telescopic assemblies is two, the telescopic assemblies are respectively sleeved on the two sliding beams (6) through sliding portions (4), racks are arranged on the sliding beams (6), and gears (12) are meshed with the racks.

2. A spinal tension and compression device as recited in claim 1, wherein: the length of the adjusting rod (2) is larger than that of the connecting rod (1), two ends of the adjusting rod are located outside the connecting rod (1), the upper end of the adjusting rod (2) is provided with threads, and the adjusting nut (9) is connected to the threads.

3. A spinal tension and compression device as recited in claim 1, wherein: the fixing ring (3) is rotatably connected with the adjusting rod (2), and the fixing ring (3) is internally sleeved with a connecting rod (13).

4. A spinal tension and compression device as recited in claim 1, wherein: the joint surface of the shaft sleeves (7) of the sliding beams (6) is provided with radial teeth, and the teeth of the shaft sleeves (7) of the two sliding beams (6) on the joint surface are meshed with each other.

5. A spinal tension and compression device as claimed in claim 1 or claim 4 wherein: the pin shaft (8) is horizontally arranged, one end of the pin shaft is provided with a thread, and a locking nut is arranged on the thread.

6. A spinal tension and compression device as recited in claim 1, wherein: the thickness of the shaft sleeve (7) is half of that of the sliding beam (6).

7. A spinal tension and compression device as recited in claim 1, wherein: the gear rack is characterized in that an orientation wheel (5) is arranged in the groove (10), the orientation wheel (5) is located on the outer side of the gear (12) and is rotatably connected with the sliding portion (4), a first pawl (502) and a second pawl (503) are arranged on the side, close to the gear, of the orientation wheel (5), the first pawl (502) and the second pawl (503) are located on two sides of a connecting line of the gear (12) and the axis of the orientation wheel (5), and the first pawl (502) and the second pawl (503) can be clamped in tooth grooves on two sides of the gear (12) in an inclined mode respectively.

8. The spinal column stretch and compression device of claim 7, wherein: a pulling handle (501) is arranged on the side, away from the gear, of the directional wheel (5), and the pulling handle (501) extends out of the groove (10).

9. A spinal tension and compression device as recited in claim 1, wherein: the rack on the sliding beam (6) is located on the side face, the groove (10) is located on the side face of the sliding portion (4), the gear (12) is horizontally arranged, and the adjusting head (11) is located on the top of the sliding portion (4).

10. A spinal tension and compression device as recited in claim 1, wherein: the rack on sliding beam (6) is located the top surface, recess (10) are located sliding part (4) top, gear (12) vertical setting, and regulation head (11) are located sliding part (4) side.

Technical Field

The invention relates to the field of medical instruments, in particular to a stretching and compressing device for a spine.

Background

The vertebral column deformity is a serious disease, and usually needs to be treated and corrected through an operation, and the posterior vertebral pedicle nail-bar internal fixation technology is a common vertebral column surgical operation and is widely applied to clinic. In the orthopedic spine surgery, it is usually necessary to first correct the deformed spine and then fix the deformed spine, and the nail-rod fixing system mainly includes pedicle screws and connecting rods. Because the positions of the vertebral pedicles of the malformed vertebra are not on the same straight line, the three-dimensional space can be seriously deviated from the normal state, and the deformation condition is irregular, the existing orthopedic device can not adapt to various vertebral malformation conditions, and the ideal vertebral orthopedic effect can not be obtained frequently

Moreover, the existing spinal orthopedic devices are complex to operate and have high requirements on physicians, and the difficulty and risk of spinal orthopedic surgery are increased.

Disclosure of Invention

In order to solve the defects and shortcomings of the technical problems, the invention provides the stretching and compressing device for the spine, which is suitable for spine correction of serious convex deformity, achieves better correction effect, and reduces the operation difficulty and operation risk of doctors.

A stretching and compressing device for the spine comprises a telescopic component and an adjusting component;

the telescopic assembly comprises a fixing part and a moving part, the fixing part comprises a connecting rod and an adjusting rod, the connecting rod is hollow, the adjusting rod is movably arranged in the connecting rod and can slide in the connecting rod, the lower end of the adjusting rod is connected with a fixing ring, the moving part comprises a sliding part, a gear and an adjusting head, a square through hole is formed in the sliding part, a groove is formed in one surface of the sliding part, the gear is arranged in the groove through a shaft, the adjusting head is movably connected with a central shaft of the gear, and the upper end of the connecting rod is connected to the sliding part;

the adjusting assembly comprises two sliding beams, one end of each sliding beam is provided with a shaft sleeve, a pin shaft penetrates through the shaft sleeves to connect the two sliding beams together, the number of the telescopic assemblies is two, the two telescopic assemblies are respectively sleeved on the two sliding beams through sliding parts, the sliding beams are provided with racks, and the gears are meshed with the racks.

Furthermore, the length of the adjusting rod is larger than that of the connecting rod, two ends of the adjusting rod are located outside the connecting rod, the upper end of the adjusting rod is provided with threads, and the adjusting nut is connected to the threads.

Furthermore, the fixed ring is rotatably connected with the adjusting rod, and the connecting rod is sleeved in the fixed ring.

Furthermore, the joint surface of the shaft sleeves of the two sliding beams is provided with radial teeth, and the teeth of the shaft sleeves of the two sliding beams on the joint surface are meshed with each other.

Furthermore, the pin shaft is horizontally arranged, one end of the pin shaft is provided with a thread, and a locking nut is arranged on the thread.

Further, the thickness of the shaft sleeve is half of that of the sliding beam.

Furthermore, a directional wheel is arranged in the groove, the directional wheel is positioned on the outer side of the gear and is rotatably connected with the sliding part, a first pawl and a second pawl are arranged on the side, close to the gear, of the directional wheel, the first pawl and the second pawl are positioned on two sides of a connecting line of the gear and the axis of the directional wheel and can be clamped in tooth grooves on two sides of the gear in an inclined mode respectively.

Furthermore, a pulling handle is arranged on the side, away from the gear, of the directional wheel, and the pulling handle extends out of the groove.

Preferably, the rack on the sliding beam is located on the side face, the groove is located on the side face of the sliding portion, the gear is horizontally arranged, and the adjusting head is located at the top of the sliding portion.

Preferably, the rack on the sliding beam is located on the top surface, the groove is located on the top of the sliding portion, the gear is vertically arranged, and the adjusting head is located on the side surface of the sliding portion.

The invention has the beneficial effects that:

1. the invention is provided with a plurality of telescopic structures which are connected with the connecting rods and can be stretched or compressed at multiple points to synchronously adjust a plurality of nail rod fixing systems;

2. the telescopic structures are connected through the sliding beams, the angles of the sliding beams are adjustable, the stretching degree or the compression degree of each fixed point can be controlled during stretching or compressing, the angles between the fixed points can be corrected, and the application range is wide;

3. the invention can be rotationally connected with the connecting rod, thereby ensuring the flexibility;

3. the telescopic structure is matched with the sliding beam through the pawl, and the directional wheel is arranged, so that the movement direction of the gear can be controlled, the gear can be fixed, and the stability of the telescopic structure is ensured.

Drawings

FIG. 1 is a schematic structural view of example 1;

FIG. 2 is a schematic structural view of example 2;

FIG. 3 is a top view of the connection portion of the sliding beam;

FIG. 4 is a schematic view of a movement adjustment embodiment of the present invention;

in the figure: 1-connecting rod, 2-adjusting rod, 3-fixing ring, 4-sliding part, 5-orientation wheel, 501-pulling handle, 502-first pawl, 503-second pawl, 6-sliding beam, 7-shaft sleeve, 8-pin shaft, 9-adjusting nut, 10-groove, 11-adjusting head, 12-gear and 13-connecting rod.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings.

Example 1

As shown in fig. 1, 3 and 4, the invention provides a stretching and compressing device for a spine, which comprises a telescopic component and an adjusting component;

the telescopic assembly comprises a fixing portion and a moving portion, the fixing portion comprises a connecting rod 1 and an adjusting rod 2, the connecting rod 1 is hollow inside, the adjusting rod 2 is movably arranged in the connecting rod 1 and can slide in the connecting rod 1, the lower end of the adjusting rod 2 is connected with a fixing ring 3, the fixing ring 3 is rotatably connected with the adjusting rod 2, and a connecting rod 13 is sleeved in the fixing ring 3. The moving part comprises a sliding part 4, a gear 12 and an adjusting head 11, a square through hole is formed in the sliding part 4, a groove 10 is formed in the side face of the sliding part, and the gear 12 is horizontally arranged and installed in the groove 10 through a shaft. The adjusting head 11 is movably connected with a central shaft of the gear 12, the adjusting head 11 is positioned on the top surface of the sliding part 4, the adjusting head 11 is provided with an outer hexagonal head, and the upper end of the connecting rod 1 is connected on the sliding part 4;

the adjusting assembly comprises two sliding beams 6, one end of each sliding beam 6 is provided with a shaft sleeve 7, the thickness of each shaft sleeve 7 is half of that of each sliding beam 6, a pin shaft 8 penetrates through the shaft sleeves to connect the two sliding beams together, the joint surface of the shaft sleeves 7 of the sliding beams 6 is provided with radial teeth, the teeth of the shaft sleeves 7 of the two sliding beams 6 on the joint surface are meshed with each other, the pin shaft 8 is horizontally arranged, one end of the pin shaft is provided with threads, and locking nuts are arranged on the threads. The number of the telescopic assemblies is two, the two telescopic assemblies are respectively sleeved on the two sliding beams 6 through the sliding parts 4, racks are arranged on the side faces of the sliding beams 6, and the gears 12 are meshed with the racks left and right.

Preferably, the adjusting head 11 and the locking nut are hexagonal heads, have the same size, can be matched with the same wrench, and reduce the replacement of auxiliary tools.

Furthermore, the length of the adjusting rod 2 is larger than that of the connecting rod 1, two ends of the adjusting rod are located outside the connecting rod 1, the upper end of the adjusting rod 2 is provided with threads, the adjusting nut 9 is connected to the threads, and the adjusting nut 9 is a hexagon nut.

Furthermore, a directional wheel 5 is arranged in the groove 10, the directional wheel 5 is positioned outside the gear 12 and is rotatably connected with the sliding part 4, a first pawl 502 and a second pawl 503 are arranged on the side, close to the gear, of the directional wheel 5, and the first pawl 502 and the second pawl 503 are positioned on two sides of a connecting line of the gear 12 and the axis of the directional wheel 5 and can be respectively clamped in tooth grooves on two sides of the gear 12 in an inclined mode. The axis of the directional wheel 5 is parallel to the axis of the gear 12 and is positioned on the same plane.

Furthermore, the orientation wheel 5 is provided with a pull handle 501 at the side away from the gear, and the pull handle 501 extends out of the groove 10.

The invention can selectively stretch or compress the spine fixing point according to the actual operation requirement, and the implementation method comprises the following steps:

the pedicle screw is driven into the spinal surgery, the pedicle screw is fixedly connected through the connecting rod 13, the device is connected with the connecting rod 13 through the fixing ring 3, and the fixing ring 3 can rotate and is matched with various angles of the connecting rod 13; the angle between the sliding beams 6 and the position of the telescopic assembly on the sliding beams 6 are adjusted, and then the locking shaft sleeve 7 is fixed for the angle.

The method for adjusting the position of the telescopic assembly comprises the following steps: firstly, determining the motion direction of the assembly, then, pulling the pull handle 501 to rotate the directional wheel 5, so that any one of the first pawl 502 and the second pawl 503 is obliquely clamped in tooth grooves at two sides of the gear 12, the gear 12 performs unidirectional motion and is reversely locked, then, pulling the adjusting head 11 to drive the gear 12 to rotate and perform linear motion relative to the sliding beam 6, and finally, driving the whole telescopic assembly to move.

After the spine correction device is installed, a doctor determines the tensile strength or the compressive strength of each tensile point or each compressive point according to the disease of a patient, and adjusts the positions of the tensile points or the compressive points by rotating the adjusting nuts 9, so that the spine correction effect is achieved.

Example 2

As shown in fig. 2, the engaging portion of the telescopic assembly and the adjusting assembly may be disposed on the other side: the sliding part 4 is internally provided with a square through hole, the top of the sliding part is provided with a groove 10, and the gear 12 is vertically arranged and is arranged in the groove 10 through a shaft. Adjust head 11 and gear 12's center pin swing joint, it is located 4 sides of sliding part to adjust head 11, flexible subassembly passes through sliding part 4 cover respectively and establishes on two sliding beam 6, sliding beam 6 top is provided with the rack, and gear 12 meshes mutually from top to bottom with the rack, and first 11 is adjusted in the pulling, drives gear 12 and rotates and relative sliding beam 6 and be linear motion, drives whole flexible subassembly motion at last.

The present invention is capable of other embodiments, and various changes and modifications may be made by one skilled in the art without departing from the spirit and scope of the invention.