CN210095884U - Bone screw bolt convenient to disassemble - Google Patents
Bone screw bolt convenient to disassemble Download PDFInfo
- Publication number
- CN210095884U CN210095884U CN201920429015.8U CN201920429015U CN210095884U CN 210095884 U CN210095884 U CN 210095884U CN 201920429015 U CN201920429015 U CN 201920429015U CN 210095884 U CN210095884 U CN 210095884U
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- cavity
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- 210000000988 bone and bone Anatomy 0.000 title claims abstract description 31
- 238000007789 sealing Methods 0.000 claims description 27
- 206010020649 Hyperkeratosis Diseases 0.000 claims description 4
- 230000006378 damage Effects 0.000 abstract description 7
- 230000035876 healing Effects 0.000 abstract description 4
- 230000000694 effects Effects 0.000 description 7
- 230000001154 acute effect Effects 0.000 description 3
- 210000002436 femur neck Anatomy 0.000 description 3
- 238000009940 knitting Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 210000000689 upper leg Anatomy 0.000 description 3
- 208000027418 Wounds and injury Diseases 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005553 drilling Methods 0.000 description 2
- 208000020089 femoral neck fracture Diseases 0.000 description 2
- 208000014674 injury Diseases 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 241000237858 Gastropoda Species 0.000 description 1
- 229910001069 Ti alloy Inorganic materials 0.000 description 1
- 210000004394 hip joint Anatomy 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000017074 necrotic cell death Effects 0.000 description 1
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Abstract
The utility model discloses a just, dismantle formula bone screw bolt, including the bolt body, the bolt body includes spiral shell head and spiral shell body, and spiral shell body outside is equipped with one section polished rod portion and one section screw thread portion, and the precession operation chamber of atress when being used for bolt body precession is offered to spiral shell head tip, and the inside screw-out operation chamber of atress when being used for bolt body screw-out of offering of polished rod portion communicates with each other with precession operation chamber. The bone screw bolt has the advantages of simple and reliable structure, convenient operation, avoiding operation damage and improving healing progress.
Description
Technical Field
The utility model relates to a medical auxiliary instrument especially relates to a just, dismantlement formula bone bolt.
Background
The femoral neck fracture is usually fixed by three sharp hexagonal hollow screws, the materials of the three sharp hexagonal hollow screws are usually titanium alloy, and the front parts of the screws are provided with cancellous threads, so that the threads are thicker, and the holding force is higher. And the screw is generally not tapped during the operation, so that a sharp hexagonal smooth thread is often generated. When the cannulated screw needs to be taken out after operation (for example, femoral head necrosis after femoral neck fracture and hip joint replacement or femoral head protection treatment needs to be carried out again), the cannulated screw needs to be screwed out by an acute hexagonal screwdriver, the holding force in the femoral head is large due to the thick thread at the front part of the screw, and the acute hexagonal hole of the cannulated screw is easy to have an acute hexagonal slide thread under the condition of the existing slide thread at the early stage. Once the screw is slipped, due to the lack of an effective hollow screw extractor, the screw is hopefully extracted by drilling with a vice or an electric drill, the operation is time-consuming, the damage to the femoral neck and the femur is large, and the operation progress and the operation healing are seriously affected.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is to overcome the not enough of prior art, provide a simple structure is reliable, convenient operation, can avoid the operation damage, can improve the just detachable formula bone bolt that heals up the progress.
The detachable bone screw bolt can improve the cooling effect of the small end of the connecting rod and realize the auxiliary cooling of the pin hole.
In order to solve the technical problem, the utility model discloses a following technical scheme:
the utility model provides a just, dismantle formula bone-knitting bolt, includes the bolt body, the bolt body includes spiral shell head and spiral shell body, spiral shell body outside is equipped with one section polished rod portion and one section screw thread portion, the precession operation chamber of atress when being used for bolt body precession is offered to spiral shell head tip, the precession operation chamber of atress when being used for bolt body precession is offered to polished rod portion inside, the precession operation chamber communicates with each other with precession operation chamber.
As a further improvement of the above technical solution:
the aperture of the screwing-out operation cavity is smaller than that of the screwing-in operation cavity.
The screwing-out operation cavity is of a triangular cavity structure.
The triangular cavity is set to be a regular triangular cavity.
The screw-in operation cavity is a regular hexagonal cavity.
Also included is an obturating assembly for preventing callus growth into the precession operating cavity.
The cavity sealing assembly comprises a cover body and an elastic cavity sealing pad, the elastic cavity sealing pad is sleeved in the screwing-out operation cavity, and the cover body covers the cavity opening of the screw head.
The cover body is provided with a push-pull rod which extends into the screwing operation cavity and is fastened with the elastic sealing cavity pad, the push-pull rod is provided with a fastening head, and the elastic sealing cavity pad is provided with an internal expanding fastening groove matched with the fastening head.
The cover body is provided with a nut, the nut is in threaded fit with the screw head, and a gap is formed between the nut and the screw head in the axial direction in the threaded fit.
The periphery of lid is equipped with the ka tai, the precession operation chamber of spiral shell head is equipped with L type draw-in groove in accent department, the ka tai along the vertical entering of L type draw-in groove and the horizontal groove joint of rotation angle back with L type draw-in groove.
Compared with the prior art, the utility model has the advantages of:
the utility model discloses a just, dismantle formula bone-knitting bolt, including the bolt body, the bolt body includes spiral shell head and spiral shell body, and spiral shell body outside is equipped with one section polished rod portion and one section screw thread portion, and the precession operation chamber of atress when being used for bolt body precession is offered to spiral shell head tip, and the inside screw-out operation chamber of atress when being used for bolt body screw-out of offering of polished rod portion, screw-out operation chamber communicates with each other with precession operation chamber. When the bone screw bolt is required to be taken out, the tool extends to the next-stage screwing-out operation cavity to carry out reverse rotation operation, so that the thread part is screwed out. Compared with the traditional structure, the bone screw bolt is provided with the mutually independent operation cavities in the screw head and the polished rod part, the screw head and the polished rod part are used independently and do not interfere with each other, even if the screw operation cavity is screwed in to cause stress damage and slipping during bone setting, the screw bolt can be changed in operation when being taken out, the new screw operation cavity is rotated reversely, the bone screw bolt does not need to be drilled by a vice or an electric drill, and the bone screw bolt is simple in structure and convenient to operate; on one hand, the operation time is saved; on the other hand, the femoral neck and the femur cannot be damaged when the femoral head is taken out, so that the injury prevention effect is achieved, and the operation progress and the healing progress are improved; furthermore, the screwing-out operation cavity is positioned inside the polished rod part, so that the force arm during screwing-out operation is greatly shortened, and the stress intensity during screwing-out operation is ensured.
Drawings
Fig. 1 is a schematic front view of embodiment 1 of the present invention.
Fig. 2 is a schematic main sectional structure diagram of embodiment 1 of the present invention.
Fig. 3 is a schematic cross-sectional structure view of the bolt body in embodiment 1 of the present invention.
Fig. 4 is a schematic structural view of the cover in embodiment 1 of the present invention.
Fig. 5 is a schematic structural view of the elastic cavity sealing pad in embodiment 1 of the present invention.
Fig. 6 is a schematic bottom view of fig. 3.
Fig. 7 is a schematic front view of embodiment 2 of the present invention.
Fig. 8 is a main sectional structure diagram of embodiment 2 of the present invention.
Fig. 9 is a schematic cross-sectional structure view of the bolt body in embodiment 2 of the present invention.
Fig. 10 is a schematic structural view of a cover in embodiment 2 of the present invention.
Fig. 11 is a bottom view of the structure of fig. 9.
The reference numerals in the figures denote:
1. a bolt body; 11. a screw head; 111. screwing into the operating cavity; 1111. an L-shaped clamping groove; 112. screwing out the operation cavity; 12. a snail body; 121. a light bar section; 122. a threaded portion; 2. a cavity sealing component; 21. a cover body; 211. clamping a platform; 22. an elastic cavity sealing pad; 221. an inner expanding buckle slot; 23. a push-pull rod; 231. and (6) buckling a head.
Detailed Description
The invention will be described in further detail with reference to the drawings and specific examples.
Example 1:
fig. 1 to 6 show the utility model discloses just, first embodiment of dismantlement formula bone bolt, including bolt body 1, bolt body 1 includes spiral shell head 11 and spiral shell body 12, and spiral shell body 12 outside is equipped with one section polished rod portion 121 and one section screw thread portion 122, and the precession operation chamber 111 of atress when being used for bolt body 1 precession is offered to spiral shell head 11 tip, and the back-off operation chamber 112 of atress when being used for bolt body 1 back-off is offered to polished rod portion 121 inside, and back-off operation chamber 112 communicates with each other with precession operation chamber 111. When the bone screw is used, a tool is extended to the screwing-in operation cavity 111 to perform rotation operation, so that the thread part 122 is screwed in to achieve a bone-knitting effect, and when the bone screw needs to be taken out, the tool is extended to the screwing-out operation cavity 112 of the next stage to perform reverse rotation operation, so that the thread part 122 is screwed out. Compared with the traditional structure, the bone screw bolt is provided with the mutually independent operation cavities in the screw head 11 and the polished rod part 121, the two operation cavities are used independently and do not interfere with each other, even if the screwing operation cavity 111 has stress damage and slipping phenomena during bone connection, the operation can be changed during taking out, the reverse rotation operation is carried out on the new screwing operation cavity 112, a vice or an electric drill is not needed for drilling the bone screw bolt, the structure is simple, and the operation is convenient; on one hand, the operation time is saved; on the other hand, the femoral neck and the femur cannot be damaged when the femoral head is taken out, so that the injury prevention effect is achieved, and the operation progress and the healing progress are improved; furthermore, the screwing-out operation cavity 112 is located inside the polished rod part 121, which greatly shortens the force arm during screwing-out operation and ensures the stress intensity during screwing-out operation.
In this embodiment, the diameter of the screw-out operation cavity 112 is smaller than that of the screw-in operation cavity 111. The arrangement enables the screwing-out operation cavity 112 and the screwing-in operation cavity 111 to form a step, the screwing-out operation cavity 112 and the screwing-in operation cavity 111 are independently opened, the screwing-out operation cavity 112 cannot be damaged during screwing-in operation, and the screwing-out operability is guaranteed.
In this embodiment, the screw-out operation chamber 112 is configured as a triangular chamber structure. The triangular cavity needs to be matched with a triangular rotating tool, the triangular cavity can further improve the single-side stress area of the rotating tool, and the screwing-out effect is further improved.
In this embodiment, the triangular cavity is configured as a regular triangular cavity. The regular triangle cavity enables the three surfaces to be stressed uniformly, and uniform and effective rotating force is formed easily.
In this embodiment, the screw operation cavity 111 is a regular hexagonal cavity. The arrangement of the regular hexagonal cavity can avoid the over-operation as much as possible under the condition of ensuring the normal screwing force.
In this embodiment, a cavity sealing assembly 2 is also included for preventing callus growth into the precession operating cavity 111. In the structure, after the screwing operation of the bone screw bolt is completed, the screwing operation cavity 111 is sealed by the cavity sealing component 2, so that callus grows in the screwing operation cavity 111 when bone grows, on one hand, the effect of protecting the screwing-out operation cavity 112 is achieved, and on the other hand, the screwing-out effect can be further improved.
In this embodiment, the cavity sealing assembly 2 includes a cover 21 and an elastic cavity sealing pad 22, the elastic cavity sealing pad 22 is sleeved in the screwing-out operation cavity 112, and the cover 21 covers the opening of the screw head 11. In this structure, the elastic cavity sealing pad 22 plays a role in plugging and protecting the screwing-out operation cavity 112, and the cover body 21 plays a role in sealing the cavity opening of the screw head 11, so that the plugging function is achieved through secondary protection.
In this embodiment, the cover 21 is provided with a push-pull rod 23 extending into the screwing operation cavity 111 and fastened to the elastic cavity sealing pad 22, the push-pull rod 23 is provided with a fastening head 231, and the elastic cavity sealing pad 22 is provided with an inner expanding fastening groove 221 matched with the fastening head 231. In the structure, the push-pull rod 23 is fastened with the inner expanding fastening groove 221 through the fastening head 231, when the structure is installed, the push-pull rod 23 pushes against the elastic cavity sealing pad 22, and the reverse elasticity of the elastic cavity sealing pad 22 drives the cover body 21 to form tight connection with the cavity opening of the screw head 11; when the cover body 21 is taken out subsequently, the push-pull rod 23 can take the elastic cavity sealing pad 22 out, so that the convenience of disassembly and assembly is improved.
In this embodiment, the cover 21 is a nut, which is in threaded engagement with the screw head 11, and the nut is in threaded engagement with the screw head 11 with a gap in the axial direction. In this structure, the nut is in threaded fit with the screw head 11, but the fit is a clearance fit, that is, the nut and the screw head 11 do not form a final fastening force when in threaded fit, the final fastening force drives the nut to be axially attached to the screw thread of the screw head 11 by the reverse elasticity of the elastic cavity sealing pad 22, and the arrangement is also to ensure the convenience of screwing out the cover body 21.
Example 2:
fig. 7 to 11 show a second embodiment of the bone screw bolt of the present invention, which is substantially the same as embodiment 1 except that: in this embodiment, a clamping table 211 is disposed on the periphery of the cover 21, an L-shaped clamping groove 1111 is disposed at the cavity opening of the screwing operation cavity 111 of the screw head 11, and the clamping table 211 enters along the vertical direction of the L-shaped clamping groove 1111 and is clamped with the transverse groove of the L-shaped clamping groove 1111 after rotating by an angle. In the structure, when the structure is installed, the cover body 21 is pressed to enable the clamping table 211 to enter along the vertical direction of the L-shaped clamping groove 1111, and then the clamping table 211 is clamped with the transverse groove of the L-shaped clamping groove 1111 through rotating the angle; the cover body 21 can be reversely operated when being subsequently taken out, and the convenience of disassembly and assembly is also improved.
Although the present invention has been described with reference to the preferred embodiments, it is not intended to limit the present invention. The technical solution of the present invention can be used by anyone skilled in the art to make many possible variations and modifications, or to modify equivalent embodiments, without departing from the scope of the technical solution of the present invention, using the technical content disclosed above. Therefore, any simple modification, equivalent change and modification made to the above embodiments by the technical entity of the present invention should fall within the protection scope of the technical solution of the present invention.
Claims (10)
1. The utility model provides a just, dismantle formula bone screw bolt, includes bolt body (1), bolt body (1) is including spiral shell head (11) and spiral shell body (12), spiral shell body (12) outside is equipped with one section polished rod portion (121) and one section screw thread portion (122), its characterized in that: the screw head (11) end is provided with a screwing operation cavity (111) for bearing force when the bolt body (1) is screwed in, a screwing-out operation cavity (112) for bearing force when the bolt body (1) is screwed out is arranged in the polished rod part (121), and the screwing-out operation cavity (112) is communicated with the screwing-in operation cavity (111).
2. The bone bolt of claim 1, wherein: the aperture of the screwing-out operation cavity (112) is smaller than that of the screwing-in operation cavity (111).
3. The bone bolt of claim 2, wherein: the screwing-out operation cavity (112) is arranged into a triangular cavity structure.
4. The bone bolt of claim 3, wherein: the triangular cavity is set to be a regular triangular cavity.
5. The bone bolt of claim 4, wherein: the screw-in operation cavity (111) is arranged into a regular hexagonal cavity.
6. The easy-to-detach bone bolt according to any one of claims 1 to 5, wherein: also comprises a cavity sealing component (2) for preventing callus from growing inwards the screwing operation cavity (111).
7. The easy-to-detach bone bolt according to claim 6, wherein: the cavity sealing assembly (2) comprises a cover body (21) and an elastic cavity sealing pad (22), the elastic cavity sealing pad (22) is sleeved in the screwing-out operation cavity (112), and the cover body (21) covers the cavity opening of the screw head (11).
8. The easy-to-detach bone bolt according to claim 7, wherein: the cover body (21) is provided with a push-pull rod (23) which extends into the screwing operation cavity (111) and is buckled with the elastic sealing cavity pad (22), the push-pull rod (23) is provided with a buckle head (231), and the elastic sealing cavity pad (22) is provided with an internal expanding buckle groove (221) matched with the buckle head (231).
9. The easy-to-detach bone bolt according to claim 8, wherein: the cover body (21) is arranged to be a nut, the nut is in threaded fit with the screw head (11), and a gap is formed between the nut and the screw head (11) in the axial direction in a threaded fit mode.
10. The bone bolt of claim 9, wherein: the periphery of lid (21) is equipped with ka tai (211), precession operation chamber (111) of spiral head (11) are equipped with L type draw-in groove (1111) in accent department, card platform (211) follow the vertical entering of L type draw-in groove (1111) and rotate the angle after with the cross slot joint of L type draw-in groove (1111).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920429015.8U CN210095884U (en) | 2019-03-29 | 2019-03-29 | Bone screw bolt convenient to disassemble |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920429015.8U CN210095884U (en) | 2019-03-29 | 2019-03-29 | Bone screw bolt convenient to disassemble |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210095884U true CN210095884U (en) | 2020-02-21 |
Family
ID=69534604
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920429015.8U Active CN210095884U (en) | 2019-03-29 | 2019-03-29 | Bone screw bolt convenient to disassemble |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210095884U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111550484A (en) * | 2020-04-10 | 2020-08-18 | 河南航天精工制造有限公司 | Countersunk screw with controllable pretightening force and disassembling method thereof |
-
2019
- 2019-03-29 CN CN201920429015.8U patent/CN210095884U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111550484A (en) * | 2020-04-10 | 2020-08-18 | 河南航天精工制造有限公司 | Countersunk screw with controllable pretightening force and disassembling method thereof |
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| GR01 | Patent grant |