fulcrum tool

Abstract

The utility model provides a kind of fulcrum tool, for the bone screw is implanted into pedicle of vertebra, comprising: clamp, with first connecting piece and second connecting piece;With the first sleeve holder of first connecting piece connection, and with the second sleeve holder of second connecting piece connection, first sleeve holder has first clamping piece, second sleeve holder has second clamping piece, and the angle of first clamping piece and second clamping piece can be adjusted;First fixed sleeve, with first clamping piece connection, first fixed sleeve is used to fix one bone screw;Second fixed sleeve, with second clamping piece connection, second fixed sleeve is used to fix another bone screw.The utility model can accurately adjust the distance and angle between bone screw in the process of operation by the cooperation of clamp, first sleeve holder, second sleeve holder, so that bone screw can be accurately implanted into pedicle of vertebra, improve the treatment effect of operation.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to a fulcrum tool. Background Technology

[0002] The pedicle is an important component of the vertebral column, located behind the vertebral body. It is a short, thick, cylindrical bony structure that connects the vertebral body to the posterior structures such as the lamina and spinous process. It plays a crucial role in surgical localization.

[0003] For example, in spinal correction surgery, a fulcrum tool is needed to fix the bone screws before implanting them into the pedicle. Then, a spreader is used to open the bone screws to facilitate the surgery. To improve the surgical outcome, the bone screws need to be precisely implanted into the pedicle during the operation. However, existing fulcrum tools are complex to operate and cannot be adjusted in angle and direction during the operation, making it impossible to accurately implant the bone screws into the cervical pedicle. Utility Model Content

[0004] The purpose of this invention is to provide a fulcrum tool that can adjust the angle and direction of bone screws during surgery, thereby improving the accuracy of bone screw implantation and thus improving the treatment effect of the surgery.

[0005] To achieve the above objectives, in a first aspect, this utility model provides a fulcrum tool for implanting bone screws into the pedicle, comprising: A clamp having a first connector and a second connector; A first sleeve clamp connected to the first connector and a second sleeve clamp connected to the second connector, the first sleeve clamp having a first clamping member and the second sleeve clamp having a second clamping member, and the angles of the first clamping member and the second clamping member are adjustable; A first fixing sleeve is connected to the first clamping member, and the first fixing sleeve is used to fix a bone screw; A second fixing sleeve is connected to the second clamping member, and the second fixing sleeve is used to fix another bone screw. In some embodiments, the clamp further includes a connecting rod; The first connector and the second connector are rotatably mounted on the connecting rod; The end of the first sleeve holder away from the first clamping member is connected to the first connecting member; The end of the second sleeve clamp away from the second clamping member is connected to the second connecting member; In operation, the first connecting member and / or the second connecting member are controlled to rotate relative to the connecting rod, thereby adjusting the distance between the first fixed sleeve and the second fixed sleeve.

[0006] In some embodiments, the clamp further includes an elastic element; The elastic element is sleeved on the connecting rod and is located between the first connecting element and the second connecting element.

[0007] In some embodiments, the first connector has a first threaded hole in its radial direction, and the first threaded hole is threadedly connected to the connecting rod. The second connector has a second threaded hole along its radial direction, and the second threaded hole is threadedly connected to the connecting rod.

[0008] In some embodiments, the first sleeve clamp includes a first fixing nut, and the second sleeve clamp includes a second fixing nut; The first fixing nut is threadedly connected to the first connecting piece; The first clamping member is fixedly connected to the first fixing nut; The second fixing nut is threadedly connected to the second connecting piece; The second clamping member is fixedly connected to the second fixing nut; When the first fixing nut and the second fixing nut are rotated, the angles of the first clamping member and the second clamping member are adjusted.

[0009] In some embodiments, the first sleeve clamp further includes a first rotating nut and a first spring, and the second sleeve clamp further includes a second rotating nut and a second spring; The first rotating nut is located near the clamp and is threadedly connected to the first connecting piece; The first spring is sleeved on the first connecting member and is located between the first rotating nut and the first fixing nut; The second rotating nut is located near the clamp and is threadedly connected to the second connector; The second spring is sleeved on the second connector and is located between the second rotating nut and the second fixing nut.

[0010] In some embodiments, the first sleeve clamping device further includes a first sleeve, and the second sleeve clamping device further includes a second sleeve; The first sleeve is fitted onto the first rotating nut and the first fixing nut, and is used to adjust the opening and closing of the first clamping member to clamp or loosen the first fixing sleeve. The second sleeve is fitted onto the second rotating nut and the second fixing nut, and is used to adjust the opening and closing of the second clamping member to clamp or loosen the second fixing sleeve.

[0011] In some embodiments, one end of the first connector is provided with a first threaded hole along its axial direction, and the first threaded hole is threadedly connected to one end of the connecting rod so that the first connector and the connecting rod are coaxial. One end of the second connector is provided with a second threaded hole along its axial direction, and the second threaded hole is threadedly connected to the other end of the connecting rod so that the second connector is coaxial with the connecting rod.

[0012] In some embodiments, the other end of the first connector has a first universal ball, and the other end of the second connector has a second universal ball; The first sleeve holder includes a first locking member and a first fixing block. The first fixing block has a first fixing groove for installing the first universal ball. The first locking member is used to fix the first universal ball to the first fixing block. The first clamping member is fixedly connected to the first fixing block; The second sleeve holder includes a second locking member and a second fixing block. The second fixing block has a second fixing groove for installing the second universal ball. The second locking member is used to fix the second universal ball to the second fixing block. The second clamping member is fixedly connected to the second fixing block.

[0013] In some embodiments, the first clamping member is a first locking ring with elasticity, and the outer side wall of the first locking ring is provided with a first rack structure; The first fixing block has a first locking groove on its side wall near the first rack structure. The first locking groove cooperates with the first rack structure to fix the first fixing sleeve. The second clamping member is a second locking ring with elasticity, and the outer side wall of the second locking ring is provided with a second rack structure; The second fixing block has a second locking groove on its side wall near the second rack structure. The second locking groove cooperates with the second rack structure to fix the second fixing sleeve.

[0014] The beneficial effects of the fulcrum tool provided by this utility model are as follows: 1. The fulcrum tool and instrument provided in this application are easy to operate and have a simple structure. Through the cooperation of the clamp, the first sleeve holder, and the second sleeve holder, the distance and angle between the bone screws can be precisely adjusted during the operation, so that the bone screws can be accurately implanted into the pedicle, thereby enhancing the stability and strength of the repair site, reducing the error rate during the operation, and improving the treatment effect of the operation. Attached Figure Description

[0015] Figure 1A front view of the fulcrum tool according to the first embodiment of this utility model; Figure 2 A schematic diagram of the clamping device according to the first embodiment of this utility model; Figure 3 A schematic diagram of the connection between the first sleeve clamp, the second sleeve clamp, and the clamp in the first embodiment of this utility model; Figure 4 A schematic diagram of the structure of the fulcrum tool according to the first embodiment of this utility model after installing the first sleeve and the second sleeve; Figure 5 A front view of the fulcrum tool according to the second embodiment of this utility model; Figure 6 An exploded view of the clamping device according to the second embodiment of this utility model.

[0016] Icon labels: Clamping device 1, first connecting member 11, first universal ball joint 111, second connecting member 12, second universal ball joint 121, connecting rod 13, elastic element 14, first sleeve holding device 2, first clamping member 21, first rack structure 211, first fixing nut 22, first rotating nut 23, first spring 24, first sleeve 25, first locking member 26, first fixing block 27, second sleeve holding device 3, second clamping member 31, second rack structure 311, second fixing nut 32, second rotating nut 33, second spring 34, second sleeve 35, second locking member 36, second fixing block 37, first fixing sleeve 4, second fixing sleeve 5. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model. Unless otherwise defined, the technical or scientific terms used herein should have the ordinary meaning understood by those skilled in the art to which this utility model pertains. The terms "comprising" and similar expressions used herein mean that the element or object preceding the word covers the element or object listed following the word and its equivalents, but does not exclude other elements or objects. Unless otherwise specified, the term "connection" as used herein can refer to a direct connection or an indirect connection, i.e., a connection through an intermediate object.

[0018] Furthermore, it should be understood that the orientations or positional relationships indicated by terms such as "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer" in this document are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. The terms "first" and "second" in this document are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the invention, unless otherwise stated, "a plurality of" means two or more.

[0019] To address the problems existing in the prior art, embodiments of this utility model provide a fulcrum tool, as shown in the reference. Figure 1 Or refer to Figure 5 As shown, the fulcrum tool includes a clamp 1, a first sleeve clamp 2, a second sleeve clamp 3, a first fixed sleeve 4, and a second fixed sleeve 5. The clamp 1 has a first connecting member 11 and a second connecting member 12, both of which are rotatable. The first sleeve clamp 2 is connected to the first connecting member 11 and has a first clamping member 21, the angle of which is adjustable. The second sleeve clamp 3 is connected to the second connecting member 12 and has a second clamping member 31, the angle of which is also adjustable. The first fixed sleeve 4 is clamped and fixed by the first clamping member 21 and is used to fix a bone screw. The second fixed sleeve 5 is clamped and fixed by the second clamping member 31 and is used to fix a bone screw.

[0020] In this embodiment, since the angles of the first clamping member 21 and the second clamping member 31 are both adjustable, the angle and direction of the bone screws on the first fixing sleeve 4 and the second fixing sleeve 5 can be adjusted. This allows the bone screws to be accurately implanted into the pedicle during the operation, thereby enhancing the stability and strength of the repair site and improving the treatment effect of the surgery.

[0021] refer to Figure 1 and Figure 2 , or refer to Figure 5 and Figure 6As shown, in some embodiments, the clamp 1 further includes a connecting rod 13. One end of the first connecting member 11 and one end of the second connecting member 12 are rotatably mounted on the connecting rod 13. The end of the first sleeve clamp 2 away from the first clamping member 21 is connected to the first connecting member 11. The end of the second sleeve clamp 3 away from the second clamping member 31 is connected to the second connecting member 12.

[0022] In operation, the first connector 11 and / or the second connector 12 are controlled to rotate relative to the connecting rod 13 to adjust the distance between the first fixing sleeve 4 and the second fixing sleeve 5, thereby achieving the adjustment of the distance between the bone screws.

[0023] In some implementations, the clamp 1 further includes an elastic element 14, which is sleeved on the connecting rod 13 and located between the first connecting member 11 and the second connecting member 12.

[0024] In this embodiment, the elastic element 14 is a spring. When the first connecting member 11 and / or the second connecting member 12 rotate relative to the connecting rod 13, causing the elastic element 14 to contract and press, it plays a locking role on the first connecting member 11 and the second connecting member 12.

[0025] refer to Figure 1 and Figure 2 As shown, in some embodiments, the outer wall of the connecting rod 13 is provided with an external thread structure, and the top end of the connecting rod 13 has a butterfly knob. One end of the first connecting member 11 has a first threaded hole along its radial direction, and the first threaded hole is threadedly connected to the connecting rod 13. One end of the second connecting member 12 has a second threaded hole along its radial direction, and the second threaded hole is threadedly connected to the connecting rod 13.

[0026] In this embodiment, the structural features of the first connector 11 and the second connector 12 can be understood as follows: a nut is fixedly connected to one end of the cylindrical rod. The first connector 11 and the second connector 12 are controlled to be in a locked or free state relative to the connecting rod 13 by rotating the butterfly knob. In the free state, the first fixing sleeve 4 and the second fixing sleeve 5 can be moved and adjusted, thereby realizing the adjustment of the distance between the bone screws.

[0027] refer to Figures 1 to 3As shown, in some embodiments, the first sleeve clamping device 2 includes a first fixing nut 22, and the second sleeve clamping device 3 includes a second fixing nut 32. One end of the first fixing nut 22 is threadedly connected to the first connecting member 11, and the other end is fixedly connected to the first clamping member 21. Therefore, when the first fixing nut 22 is rotated, the angle of the first clamping member 21 can be adjusted. Since the first clamping member 21 clamps and fixes the first fixing sleeve 4, the angle of the bone screw on the first fixing sleeve 4 can be adjusted. One end of the second fixing nut 32 is threadedly connected to the second connecting member 12, and the other end is fixedly connected to the second clamping member 3. Therefore, when the second fixing nut 32 is rotated, the angle of the second clamping member 31 can be adjusted. Since the first clamping member 21 clamps and fixes the first fixing sleeve 4, the angle of the bone screw on the first fixing sleeve 4 can be adjusted.

[0028] Furthermore, the first sleeve clamp 2 also includes a first rotating nut 23 and a first spring 24, and the second sleeve clamp 3 also includes a second rotating nut 33 and a second spring 34.

[0029] The first rotating nut 23 is located near the clamping device 1 and threadedly connected to the first connecting member 11. The first spring 24 is sleeved on the first connecting member 11 and located between the first rotating nut 23 and the first fixed nut 22. When the first rotating nut 23 is rotated, causing the first spring 24 to compress, it provides a certain locking effect on the first fixed nut 22 and the first rotating nut 23. The second rotating nut 33 is located near the clamping device 1 and threadedly connected to the second connecting member 12. The second spring 34 is sleeved on the second connecting member 12 and located between the second rotating nut 33 and the second fixed nut 32. When the second rotating nut 33 is rotated, causing the second spring 34 to compress, it provides a certain locking effect on the second fixed nut 32 and the second rotating nut 33.

[0030] refer to Figure 3 and Figure 4 As shown, in some embodiments, the first sleeve clamping device 2 further includes a first sleeve 25, and the second sleeve clamping device 3 further includes a second sleeve 35. Both the first clamping member 21 and the second clamping member 31 are elastic claws with openings.

[0031] The first sleeve 25 is fitted onto the first rotating nut 23 and the first fixing nut 22, and one end of the first sleeve 25 is used to abut against the two side walls of the first clamping member 21 to adjust the opening size of the first clamping member 21, so as to clamp or loosen the first fixing sleeve 4. The second sleeve 35 is fitted onto the second rotating nut 33 and the second fixing nut 32, and one end of the second sleeve 35 is used to abut against the two side walls of the second clamping member 31 to adjust the opening size of the second clamping member 31, so as to clamp or loosen the second fixing sleeve 5.

[0032] refer to Figure 5 and Figure 6 As shown, in some embodiments, the outer wall of the connecting rod 13 is provided with a threaded structure. One end of the first connecting member 11 has a first threaded hole along its axial direction, and the first threaded hole is threadedly connected to one end of the connecting rod 13 so that the first connecting member 11 and the connecting rod 13 are coaxially arranged. One end of the second connecting member 12 has a second threaded hole along its axial direction, and the second threaded hole is threadedly connected to the other end of the connecting rod 13 so that the second connecting member 12 and the connecting rod 13 are coaxial.

[0033] In this embodiment, by rotating the first connector 11 and / or the second connector 12, the first connector 11 and the second connector 12 can extend or retract relative to the connecting rod 13, thereby adjusting the distance between the bone screws.

[0034] Continue to refer to Figure 5 and Figure 6 As shown, in some embodiments, the other end of the first connector 11 has a first universal ball 111, and the other end of the second connector 12 has a second universal ball 121. The first sleeve holder 2 includes a first locking member 26 and a first fixing block 27. The first fixing block 27 has a first fixing groove for installing the first universal ball 111. The first locking member 26 is used to fix the first universal ball 111 to the first fixing block 27, and the first clamping member 21 is fixedly connected to the first fixing block 27. The second sleeve holder 3 includes a second locking member 36 and a second fixing block 37. The second fixing block 37 has a second fixing groove for installing the second universal ball 121. The second locking member 36 is used to fix the second universal ball 121 to the second fixing block 37, and the second clamping member 31 is fixedly connected to the second fixing block 37.

[0035] In this embodiment, both the first fixing block 27 and the second fixing block 37 include connecting blocks spaced vertically apart. The first locking member 26 and the second locking member 36 are both bolts with butterfly knobs. The bolts are threadedly connected to the connecting blocks, and the distance between the upper and lower connecting blocks is adjusted by rotating the butterfly knobs. When it is necessary to fix the first universal ball 111 and the second universal ball 121, the butterfly knobs are rotated to bring the corresponding upper and lower connecting blocks closer together, thereby clamping and fixing the first universal ball 111 and the second universal ball 121. When it is necessary to adjust the angle of the bone screw, the butterfly knobs are rotated to move the corresponding upper and lower connecting blocks further apart, allowing the first universal ball 111 to be movable within the first fixing groove and the second universal ball 121 to be movable within the second fixing groove.

[0036] Furthermore, the first clamping member 21 is a first locking ring with elasticity, and a first rack structure 211 is formed on the outer side wall of the first locking ring. A first locking groove is formed on the side wall of the first fixing block 27 near the first rack structure 211, and the first locking groove cooperates with the first rack structure 211 to fix the first fixing sleeve 4. The second clamping member 31 is a second locking ring with elasticity, and a second rack structure 311 is formed on the outer side wall of the second locking ring. A second locking groove is formed on the side wall of the second fixing block 37 near the second rack structure 311, and the second locking groove cooperates with the second rack structure 311 to fix the second fixing sleeve 5.

[0037] In this embodiment, the first clamping member 21 and the first fixing block 27, as well as the second clamping member 31 and the second fixing block 37, all adopt the principle of ratchet mechanism, thereby realizing the locking of the first fixing sleeve 4 and the second fixing sleeve 5.

[0038] The above description is merely a specific implementation of the embodiments of this application, but the protection scope of the embodiments of this application is not limited thereto. Any changes or substitutions within the technical scope disclosed in the embodiments of this application should be covered within the protection scope of the embodiments of this application. Therefore, the protection scope of the embodiments of this application should be determined by the protection scope of the claims.

Claims

1. A fulcrum tool for implanting bone screws into the pedicle, characterized in that, include: A clamp having a first connector and a second connector; A first sleeve clamp connected to the first connector and a second sleeve clamp connected to the second connector, the first sleeve clamp having a first clamping member and the second sleeve clamp having a second clamping member, and the angles of the first clamping member and the second clamping member are adjustable; A first fixing sleeve is connected to the first clamping member, and the first fixing sleeve is used to fix a bone screw; A second fixing sleeve is connected to the second clamping member, and the second fixing sleeve is used to fix another bone screw.

2. The fulcrum tool according to claim 1, characterized in that, The clamp also includes a connecting rod; The first connector and the second connector are rotatably mounted on the connecting rod; The end of the first sleeve holder away from the first clamping member is connected to the first connecting member; The end of the second sleeve clamp away from the second clamping member is connected to the second connecting member; In operation, the first connecting member and / or the second connecting member are controlled to rotate relative to the connecting rod, thereby adjusting the distance between the first fixed sleeve and the second fixed sleeve.

3. The fulcrum tool according to claim 2, characterized in that, The clamp also includes an elastic element; The elastic element is sleeved on the connecting rod and is located between the first connecting element and the second connecting element.

4. The fulcrum tool according to claim 2 or 3, characterized in that, The first connector has a first threaded hole along its radial direction, and the first threaded hole is threadedly connected to the connecting rod. The second connector has a second threaded hole along its radial direction, and the second threaded hole is threadedly connected to the connecting rod.

5. The fulcrum tool according to claim 4, characterized in that, The first sleeve clamp includes a first fixing nut, and the second sleeve clamp includes a second fixing nut; The first fixing nut is threadedly connected to the first connecting piece; The first clamping member is fixedly connected to the first fixing nut; The second fixing nut is threadedly connected to the second connecting piece; The second clamping member is fixedly connected to the second fixing nut; When the first fixing nut and the second fixing nut are rotated, the angles of the first clamping member and the second clamping member are adjusted.

6. The fulcrum tool according to claim 5, characterized in that, The first sleeve clamp further includes a first rotating nut and a first spring, and the second sleeve clamp further includes a second rotating nut and a second spring; The first rotating nut is located near the clamp and is threadedly connected to the first connecting piece; The first spring is sleeved on the first connecting member and is located between the first rotating nut and the first fixing nut; The second rotating nut is located near the clamp and is threadedly connected to the second connector; The second spring is sleeved on the second connector and is located between the second rotating nut and the second fixing nut.

7. The fulcrum tool according to claim 6, characterized in that, The first sleeve clamp further includes a first sleeve, and the second sleeve clamp further includes a second sleeve; The first sleeve is fitted onto the first rotating nut and the first fixing nut, and is used to adjust the opening and closing of the first clamping member to clamp or loosen the first fixing sleeve. The second sleeve is fitted onto the second rotating nut and the second fixing nut, and is used to adjust the opening and closing of the second clamping member to clamp or loosen the second fixing sleeve.

8. The fulcrum tool according to claim 2 or 3, characterized in that, One end of the first connector is provided with a first threaded hole along its axial direction. The first threaded hole is threadedly connected to one end of the connecting rod so that the first connector and the connecting rod are coaxial. One end of the second connector is provided with a second threaded hole along its axial direction, and the second threaded hole is threadedly connected to the other end of the connecting rod so that the second connector is coaxial with the connecting rod.

9. The fulcrum tool according to claim 8, characterized in that, The other end of the first connector has a first universal ball, and the other end of the second connector has a second universal ball; The first sleeve holder includes a first locking member and a first fixing block. The first fixing block has a first fixing groove for installing the first universal ball. The first locking member is used to fix the first universal ball to the first fixing block. The first clamping member is fixedly connected to the first fixing block; The second sleeve holder includes a second locking member and a second fixing block. The second fixing block has a second fixing groove for installing the second universal ball. The second locking member is used to fix the second universal ball to the second fixing block. The second clamping member is fixedly connected to the second fixing block.

10. The fulcrum tool according to claim 9, characterized in that, The first clamping member is a first locking ring with elasticity, and the outer side wall of the first locking ring is provided with a first rack structure; The first fixing block has a first locking groove on its side wall near the first rack structure. The first locking groove cooperates with the first rack structure to fix the first fixing sleeve. The second clamping member is a second locking ring with elasticity, and the outer side wall of the second locking ring is provided with a second rack structure; The second fixing block has a second locking groove on its side wall near the second rack structure. The second locking groove cooperates with the second rack structure to fix the second fixing sleeve.

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