Disassembled bone bolt

Abstract

The invention discloses a detachable bone bolt, comprising a bolt body, the bolt body comprising a screw head and a screw body, a section of a bare rod and a section of a threaded portion are arranged outside the screw body, a screw-in operation cavity is provided at the end of the screw head for receiving force when the bolt body is screwed in, a screw-out operation cavity is provided inside the bare rod for receiving force when the bolt body is screwed out, and the screw-out operation cavity is communicated with the screw-in operation cavity. The bone bolt has the advantages of simple and reliable structure, convenient operation, ability to avoid operation damage, and ability to improve healing progress.

Description

Technical Field

[0001] The invention mainly relates to a medical auxiliary device, in particular to a detachable bone bolt. Background Art

[0002] Femoral neck fractures are often fixed with three sharp hexagonal hollow screws, which are usually made of titanium alloy. Since the front part of the screw is a cancellous bone thread, the thread is thicker and has a greater holding force. In addition, when screwing in the screw during surgery, there is generally no tapping, so sharp hexagonal thread slippage often occurs. If the hollow screw needs to be removed after surgery (for example, femoral head necrosis after femoral neck fracture surgery, requiring hip replacement or femoral head preservation treatment), a sharp hexagonal screwdriver is needed to unscrew the hollow screw. At this time, since the front part of the screw has a thicker thread and has a greater holding force in the femoral head, the sharp hexagonal hole is more likely to slip if it has slipped in the early stage. Once the thread slips, due to the lack of an effective hollow screw extractor, it is necessary to use pliers or an electric drill to drill a hole in order to remove the screw. The operation is time-consuming and causes great damage to the femoral neck and femur, which seriously affects the progress of the operation and surgical healing. Summary of the invention

[0003] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a detachable bone fixing bolt which has a simple and reliable structure, is easy to operate, can avoid operating damage, and can improve the healing progress.

[0004] The utility model discloses a detachable bone bolt which can improve the cooling effect of the connecting rod small end and realize auxiliary cooling of the pin hole.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0006] A detachable bone bolt comprises a bolt body, wherein the bolt body comprises a screw head and a screw body, wherein a smooth rod portion and a threaded portion are arranged outside the screw body, a screw-in operation cavity is provided at the end of the screw head for receiving force when the bolt body is screwed in, and a screw-out operation cavity is provided inside the smooth rod portion for receiving force when the bolt body is screwed out, and the screw-out operation cavity is communicated with the screw-in operation cavity.

[0007] As a further improvement of the above technical solution:

[0008] The aperture of the screw-out operation cavity is smaller than the aperture of the screw-in operation cavity.

[0009] The rotating operation cavity is configured as a triangular cavity structure.

[0010] The triangular cavity is configured as a regular triangular cavity.

[0011] The precession operation cavity is configured as a regular hexagonal cavity.

[0012] Also included is a cavity sealing component for preventing bone callus from growing into the rotation operation cavity.

[0013] The sealing cavity assembly comprises a cover body and an elastic sealing cavity pad, wherein the elastic sealing cavity pad is sleeved in the screw-out operation cavity, and the cover body covers the cavity opening of the screw head.

[0014] The cover body is provided with a push-pull rod extending into the screw-in operation cavity and buckled with the elastic cavity sealing pad, the push-pull rod is provided with a buckle head, and the elastic cavity sealing pad is provided with an inner expansion buckle groove matched with the buckle head.

[0015] The cover body is configured as a nut, the nut is threadedly matched with a screw head, and the threaded matching between the nut and the screw head has a gap in the axial direction.

[0016] A clamping platform is provided on the outer periphery of the cover body, and an L-shaped clamping groove is provided at the cavity opening of the screw head screwing operation cavity. The clamping platform enters the L-shaped clamping groove vertically and is clamped with the horizontal groove of the L-shaped clamping groove after rotating an angle.

[0017] Compared with the prior art, the advantages of the present invention are:

[0018] The conveniently detachable bone-setting bolt of the present invention comprises a bolt body, the bolt body comprises a screw head and a screw body, a section of a bare rod and a section of a threaded portion are arranged outside the screw body, a screw-in operation cavity is provided at the end of the screw head for receiving force when the bolt body is screwed in, and a screw-out operation cavity is provided inside the bare rod for receiving force when the bolt body is screwed out, and the screw-out operation cavity is communicated with the screw-in operation cavity. When in use, a tool is extended to the screw-in operation cavity for rotation operation, so that the threaded portion is screwed in to achieve a bone setting effect, and when the bone-setting bolt needs to be taken out, the tool is extended to the screw-out operation cavity of the next level for reverse rotation operation, so that the threaded portion is screwed out. Compared with the traditional structure, the bone bolt is provided with independent operating chambers in the screw head and the bare rod part, and the two are used independently and do not interfere with each other. Even if stress damage or slipping occurs in the screw-in operating chamber during bone setting, the operation can be changed during removal, and the new screw-out operating chamber can be rotated in the opposite direction. There is no need to use pliers or electric drill to drill holes in the bone bolt, and the structure is simple and the operation is convenient. On the one hand, the operation time is saved; on the other hand, the femoral neck and femur will not be damaged during removal, thereby achieving an anti-injury effect and improving the progress of the operation and the healing process. Furthermore, the screw-out operating chamber is located inside the bare rod part, which greatly shortens the force arm during the screw-out operation and ensures the force strength during the screw-out operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the main structure of Example 1 of the present invention.

[0020] Figure 2 It is a schematic diagram of the main cross-sectional structure of Example 1 of the present invention.

[0021] Figure 3 It is a schematic diagram of the cross-sectional structure of the bolt body in Example 1 of the present invention.

[0022] Figure 4 It is a schematic structural diagram of the cover body in Example 1 of the present invention.

[0023] Figure 5 It is a schematic diagram of the structure of the elastic cavity sealing pad in Example 1 of the present invention.

[0024] Figure 6 yes Figure 3 Schematic diagram of the structure viewed from above.

[0025] Figure 7 It is a schematic diagram of the main structure of Example 2 of the present invention.

[0026] Figure 8 It is a schematic diagram of the main cross-sectional structure of Example 2 of the present invention.

[0027] Fig. 9 It is a schematic diagram of the cross-sectional structure of the bolt body in Example 2 of the present invention.

[0028] Fig.10 It is a schematic structural diagram of the cover body in Example 2 of the present invention.

[0029] Fig.11 yes Fig. 9 Schematic diagram of the structure viewed from above.

[0030] The symbols in the figure represent:

[0031] 1. Bolt body; 11. Screw head; 111. Screw into the operating cavity; 1111. L-shaped slot; 112. Screw out of the operating cavity; 12. Screw body; 121. Bare rod; 122. Threaded portion; 2. Sealing cavity assembly; 21. Cover body; 211. Card table; 22. Elastic sealing cavity pad; 221. Inner expansion buckle slot; 23. Push-pull rod; 231. Buckle head. DETAILED DESCRIPTION

[0032] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0033] Embodiment 1:

[0034] Figures 1 to 6The first embodiment of the detachable bone bolt of the present invention is shown, comprising a bolt body 1, the bolt body 1 comprising a screw head 11 and a screw body 12, the screw body 12 is provided with a section of a bare rod 121 and a section of a threaded portion 122 on the outside, the end of the screw head 11 is provided with a screw-in operation chamber 111 for receiving force when the bolt body 1 is screwed in, the inside of the bare rod 121 is provided with a screw-out operation chamber 112 for receiving force when the bolt body 1 is screwed out, and the screw-out operation chamber 112 is communicated with the screw-in operation chamber 111. When in use, a tool is extended to the screw-in operation chamber 111 for rotation operation, so that the threaded portion 122 is screwed in to achieve the bone setting effect, and when the bone bolt needs to be removed, the tool is extended to the screw-out operation chamber 112 of the next level for reverse rotation operation, so that the threaded portion 122 is screwed out. Compared with the traditional structure, the bone bolt is provided with independent operating chambers in the screw head 11 and the bare rod part 121, and the two are used independently and do not interfere with each other. Even if stress damage or slipping occurs when screwing into the operating chamber 111 during bone setting, the operation can be changed when removing it, and the new screwing-out operating chamber 112 can be rotated in the opposite direction. There is no need to use pliers or electric drill to drill holes for the bone bolt, and the structure is simple and the operation is convenient. On the one hand, the operation time is saved; on the other hand, the femoral neck and femur will not be damaged when removed, thereby achieving an anti-damage effect and improving the progress of the operation and the healing process. Furthermore, the screwing-out operating chamber 112 is located inside the bare rod part 121, which greatly shortens the force arm during the screwing-out operation and ensures the force strength during the screwing-out operation.

[0035] In this embodiment, the aperture of the screw-out operation chamber 112 is smaller than the aperture of the screw-in operation chamber 111. This arrangement forms a step between the screw-out operation chamber 112 and the screw-in operation chamber 111, and the screw-out operation chamber 112 and the screw-in operation chamber 111 are separated. During the screw-in operation, the screw-out operation chamber 112 will not be damaged, thereby ensuring the operability of the screw-out operation.

[0036] In this embodiment, the unscrewing operation cavity 112 is set as a triangular cavity structure. The triangular cavity needs to be matched with a triangular rotating tool, and the triangular cavity can further increase the single-sided force bearing area with the rotating tool, further improving the unscrewing effect.

[0037] In this embodiment, the triangular cavity is set as an equilateral triangular cavity. The equilateral triangular cavity allows the three surfaces to be evenly stressed, and it is easy to form a uniform and effective rotational force.

[0038] In this embodiment, the screw-in operation cavity 111 is configured as a regular hexagonal cavity, which can avoid over-operation as much as possible while ensuring a normal tightening force.

[0039] In this embodiment, a cavity sealing component 2 is also included for preventing bone callus from growing into the screw-in operation cavity 111. In this structure, after the screw-in operation of the bone bolt is completed, the cavity sealing component 2 is used to seal the screw-in operation cavity 111 to prevent bone callus from growing into the screw-in operation cavity 111 during bone growth. On the one hand, it plays a role in protecting the screw-out operation cavity 112, and on the other hand, it can further improve the screw-out effect.

[0040] In this embodiment, the sealing cavity assembly 2 includes a cover body 21 and an elastic sealing cavity pad 22. The elastic sealing cavity pad 22 is sleeved in the screw-out operation cavity 112, and the cover body 21 covers the cavity opening of the screw head 11. In this structure, the elastic sealing cavity pad 22 plays a role in plugging and protecting the screw-out operation cavity 112, while the cover body 21 plays a role in sealing the cavity opening of the screw head 11, and the plugging function is achieved through secondary protection.

[0041] In this embodiment, the cover body 21 is provided with a push-pull rod 23 extending into the screw-in operation cavity 111 and buckled with the elastic cavity sealing gasket 22, the push-pull rod 23 is provided with a buckle head 231, and the elastic cavity sealing gasket 22 is provided with an inner expansion buckle groove 221 that cooperates with the buckle head 231. In this structure, the push-pull rod 23 is buckled with the inner expansion buckle groove 221 through the buckle head 231. When installing, the push-pull rod 23 pushes against the elastic cavity sealing gasket 22, and the reverse elastic force of the elastic cavity sealing gasket 22 drives the cover body 21 to form a tight connection with the cavity of the screw head 11; when the cover body 21 is subsequently taken out, the push-pull rod 23 will bring out the elastic cavity sealing gasket 22 together, thereby improving the convenience of disassembly and assembly.

[0042] In this embodiment, the cover body 21 is configured as a nut, and the nut is threadedly matched with the screw head 11, and the threaded match between the nut and the screw head 11 has a gap in the axial direction. In this structure, the nut is threadedly matched with the screw head 11, but the match is a gap match, that is, the final tightening force will not be formed when the nut and the screw head 11 are threadedly matched. The final tightening force is driven by the reverse elastic force of the elastic sealing gasket 22 to make the nut and the screw head 11 axially close to each other. This configuration is also to ensure the convenience of screwing out the cover body 21.

[0043] Embodiment 2:

[0044] Figures 7 to 11The second embodiment of the detachable bone bolt of the present invention is shown, which is basically the same as the embodiment 1, except that: in this embodiment, a clamping platform 211 is provided on the outer periphery of the cover body 21, and an L-shaped clamping groove 1111 is provided at the cavity opening of the screw head 11's screwing operation cavity 111, and the clamping platform 211 enters the L-shaped clamping groove 1111 vertically and is clamped with the transverse groove of the L-shaped clamping groove 1111 after rotating an angle. In this structure, when installing, the cover body 21 is pressed to make the clamping platform 211 enter the L-shaped clamping groove 1111 vertically, and then the clamping platform 211 is rotated to make the transverse groove of the L-shaped clamping groove 1111 clamped; when the cover body 21 is subsequently removed, the operation can be reversed, which also improves the convenience of disassembly and assembly.

[0045] Although the present invention has been disclosed as above with preferred embodiments, it is not intended to limit the present invention. Any technician familiar with the art can make many possible changes and modifications to the technical solution of the present invention by using the technical content disclosed above without departing from the scope of the technical solution of the present invention, or modify it into an equivalent embodiment of equivalent changes. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solution of the present invention should fall within the scope of protection of the technical solution of the present invention.

Claims

1. A detachable bone bolt, comprising a bolt body (1), wherein the bolt body (1) comprises a screw head (11) and a screw body (12), wherein the screw body (12) is provided with a bare rod portion (121) and a threaded portion (122) on the outside, and wherein: The end of the screw head (11) is provided with a screw-in operation cavity (111) for receiving force when the bolt body (1) is screwed in, and the interior of the bare rod (121) is provided with a screw-out operation cavity (112) for receiving force when the bolt body (1) is screwed out, the screw-out operation cavity (112) is communicated with the screw-in operation cavity (111), and further comprises a cavity sealing component (2) for preventing bone callus from growing into the screw-in operation cavity (111), the cavity sealing component (2) comprising a cover body (21) and an elastic The elastic cavity sealing pad (22) is sleeved in the screw-out operation cavity (112), the cover body (21) covers the cavity opening of the screw head (11), the cover body (21) is provided with a push-pull rod (23) extending into the screw-in operation cavity (111) and buckled with the elastic cavity sealing pad (22), the push-pull rod (23) is provided with a buckle head (231), and the elastic cavity sealing pad (22) is provided with an inner expansion buckle groove (221) cooperating with the buckle head (231).

2. The easily detachable bone bolt according to claim 1, characterized in that: The aperture of the screw-out operation cavity (112) is smaller than the aperture of the screw-in operation cavity (111).

3. The easily detachable bone bolt according to claim 2, characterized in that: The rotating operation cavity (112) is configured as a triangular cavity structure.

4. The easily detachable bone bolt according to claim 3, characterized in that: The triangular cavity is configured as a regular triangular cavity.

5. The easily detachable bone bolt according to claim 4, characterized in that: The precession operation cavity (111) is configured as a regular hexagonal cavity.

6. The easily detachable bone bolt according to claim 5, characterized in that: The cover body (21) is configured as a nut, the nut is thread-matched with the screw head (11), and the thread-matching between the nut and the screw head (11) has a gap in the axial direction.

7. The easily detachable bone bolt according to claim 5, characterized in that: A clamping platform (211) is provided on the outer periphery of the cover body (21); an L-shaped clamping groove (1111) is provided at the opening of the screw-in operation cavity (111) of the screw head (11); the clamping platform (211) vertically enters the L-shaped clamping groove (1111) and is clamped into the transverse groove of the L-shaped clamping groove (1111) after rotating at an angle.

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