CN211381712U - Bone nail convenient to take out - Google Patents
Bone nail convenient to take out Download PDFInfo
- Publication number
- CN211381712U CN211381712U CN201922402315.XU CN201922402315U CN211381712U CN 211381712 U CN211381712 U CN 211381712U CN 201922402315 U CN201922402315 U CN 201922402315U CN 211381712 U CN211381712 U CN 211381712U
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- China
- Prior art keywords
- pipe
- extrusion head
- pipe fitting
- arc
- connecting rod
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- Expired - Fee Related
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Abstract
The utility model provides a bone nail convenient to take out, relates to medical instrument technical field, including the internal nail body, the external nail body, registration arm, the registration arm slide cup joint including on the mobile jib of the internal nail body to from left to right divide into extrusion head, connecting rod, location section, tailrod, be equipped with the cross pterygoid lamina on the location section, the arc pterygoid lamina of cross pterygoid lamina extends left and forms splint, splint pass through spring coupling with the connecting rod. This novel screw thread keeps fixed form when making rotatory through special construction's design, can not take place to slide the dislocation to both remain the powerful positioning action of traditional bone nail, when dismantling the bone nail, only need revolve locking nut B down simultaneously, revolve locking nut A down again, hand power locking nut A pulls out the location section of registration arm, and at this moment, splint can drive the pipe fitting undergauge, thereby can easily take out the bone nail.
Description
Technical Field
The utility model belongs to the technical field of medical instrument, concretely relates to bone nail convenient to take out.
Background
Bone nails are common tools for orthopedic operations, and in clinic, because the bone nails are too long to remain in a patient, the problem that the bone nails are difficult to take out often occurs, an orthopedist turns to a medical engineer to perform the forms of trepanning, chiseling, artificially manufacturing grooves and the like on the bone of the patient, and although the bone nails can be taken out, new injuries are caused to the damaged bone of the patient.
SUMMERY OF THE UTILITY MODEL
For overcoming prior art's not enough, this novel function that can preserve traditional bone nail is disclosed, and can reduce a bone nail convenient to take out of diameter when taking out.
In order to realize the purpose, the novel technical scheme is as follows:
a bone nail convenient to take out comprises an inner nail body, an outer nail body and a positioning pipe connected between the inner nail body and the outer nail body, wherein the inner nail body comprises a conical pointed end and a main rod fixedly connected to a conical bottom end face and extending rightwards along a conical axis, and the right end of the main rod is provided with an external thread; the positioning pipe is sleeved outside the main rod and is in sliding connection with the main rod, the positioning pipe sequentially comprises an extrusion head, a connecting rod, a positioning section and a tail rod which are coaxially and integrally connected from left to right, the extrusion head is of a truncated cone-shaped structure, the area of the left end of the extrusion head is smaller than that of the right end of the extrusion head, the diameter of the connecting rod is smaller than that of the right end face of the extrusion head, the diameter of the positioning section is larger than that of the right end face of the extrusion head, and the diameter of the tail rod is smaller than that of the positioning section; the outer wall surface of the positioning section is also integrally connected with a plurality of cross-shaped wing plates with cross-shaped longitudinal sections, the cross-shaped wing plates are uniformly distributed on the periphery of the positioning section, and the cross-shaped wing plates extend leftwards from the right end of the positioning section to the left end of the positioning section along the axial direction of the main rod; the outer nail body is formed by enclosing a plurality of pipe fittings of which the longitudinal sections are arc-shaped and are coaxial with the main rod, the left ends of the pipe fittings are clamped with the edge of the bottom end face of the pointed end, the pipe fittings are uniformly distributed around the axis of the main rod, gaps are reserved between the adjacent pipe fittings, and external threads A are arranged on the surface of the outer wall of each pipe fitting; the left end of an inner cavity formed by mutually enclosing the pipe fittings is fixedly provided with a sleeve A matched with the extrusion head for use, the surfaces of the two side walls of the pipe fittings are also provided with arc wing holes penetrating through the two end surfaces of the pipe fittings, the arc wing holes between the adjacent pipe fittings and a gap form a cross-shaped sliding chute matched with the cross-shaped wing plate for use, and the positioning pipe is connected with the pipe fittings in a sliding way; the right-hand member of pipe fitting still the spiro union have locking nut A, the right-hand member of tailboom pierce through locking nut A's roof and extend right, still be equipped with the centre bore coaxial with the mobile jib in the tailboom, the mobile jib extend to in the centre bore, the tailboom right-hand member still be equipped with locking nut B the left end face center of locking nut B be equipped with the sleeve pipe B that extends to the centre bore in, sleeve pipe B's internal surface be equipped with the internal thread and with the right-hand member spiro union of mobile jib, the outer wall of the tailboom of locking nut B left end face one side on the surface still fixedly connected with hexagon fixed block, the left end face of hexagon fixed block and the distance between the locking nut A right-hand member face be greater than locking nut A width.
Preferably, the cross-shaped wing plate comprises an arc-shaped wing plate matched with the arc-shaped wing hole, the arc-shaped wing plate extends towards the left side of the positioning section along the arc-shaped wing hole to form a clamping plate, and the clamping plate is made of medical elastic metal materials; the length of the extrusion head is the same as that of the positioning section, the diameter of an inner cavity defined by the pipe fitting where the connecting rod is located is equal to that of the positioning section, a limiting block A is further fixedly arranged at the right end of the inner cavity defined by the pipe fitting where the connecting rod is located, a limiting block A is arranged on any pipe fitting 2, the limiting block A is fixedly connected with the surface of the inner wall of the pipe fitting, and the top end of the limiting block A is separated from the surface of the outer wall of the connecting rod; the outer wall surface of the left end of the connecting rod is also provided with a limiting block B, and the top end of the limiting block B is separated from the inner wall surface of the pipe fitting; a spring is fixedly connected to the surface of the outer wall of the connecting rod between the limiting block B and the right end face of the extrusion head, one end of the spring is fixedly connected with the connecting rod, the other end of the spring penetrates through the gap and is fixedly connected with the clamping plate, and the distance between the limiting block B and the limiting block A is larger than the length of the extrusion head; the clamping plate extends leftwards to the left end of the arc-shaped wing hole.
Preferably, the number of the pipe fittings is 4, and the shape and the size of each pipe fitting are the same.
Preferably, the external thread A formed by enclosing the pipe fittings can be used continuously.
Preferably, the bottom face of tip on be equipped with the annular spacing groove that encircles the mobile jib axis, the left end of pipe fitting be equipped with the arc lug with annular spacing groove joint.
Preferably, when the left end of the pipe fitting is clamped with the pointed end, the inclination of the outer wall surface of the left end of the pipe fitting is the same as that of the outer wall surface of the pointed end.
Preferably, the outer wall surface of the tip is also provided with external threads.
This novel bone nail convenient to take out's beneficial effect does: this novel screw thread keeps fixed form when making rotatory through special construction's design, can not take place to slide the dislocation to both remain the powerful positioning action of traditional bone nail, when dismantling the bone nail, only need revolve locking nut B down simultaneously, revolve locking nut A down again, hand power locking nut A pulls out the location section of registration arm, and at this moment, splint can drive the pipe fitting undergauge, thereby can easily take out the bone nail.
Drawings
FIG. 1: the novel sectional structure is schematic;
FIG. 2: a cross-sectional view at a-a1 of the present novel form;
FIG. 3: a cross-sectional view at B-B1 of the present novel;
1: tip, 2: pipe fitting, 3: spring, 4: main rod, 5: limiting block A, 6: fixing cap A, 7: fixing cap B, 8: splint, 9: stopper B, 10: and an outer section of the gap. 11: gap inner section, 12: arc wing hole, 13: sleeve a, 14: extrusion head, 15: connecting rod, 16: positioning section, 17: tail rod, 18: hexagonal fixing block, 19: sleeve B, 20: cross-shaped wing plate, 201: arc-shaped wing plate, 21: external thread a, 22: arc-shaped bump, 23: annular spacing groove.
Detailed Description
The following description is of the preferred embodiment of the present invention only, and is not intended to limit the scope of the present invention, which is to be accorded the widest scope consistent with the principles and spirit of the present invention.
Referring to fig. 1 and 2:
a bone nail convenient to take out comprises an inner nail body, an outer nail body and a positioning pipe connected between the inner nail body and the outer nail body, wherein the inner nail body comprises a conical pointed end 1 and a main rod 4 fixedly connected to a conical bottom end surface and extending rightwards along a conical axis, and the right end of the main rod 4 is provided with an external thread; the positioning pipe is sleeved outside the main rod 4 and is in sliding connection with the main rod 4, the positioning pipe sequentially comprises an extrusion head 14, a connecting rod 15, a positioning section 16 and a tail rod 17 which are coaxially and integrally connected from left to right, the extrusion head 14 is of a circular truncated cone-shaped structure, the area of the left end of the extrusion head is smaller than that of the right end of the extrusion head 14, the diameter of the connecting rod 15 is smaller than that of the right end of the extrusion head 14, the diameter of the positioning section 16 is larger than that of the right end of the extrusion head 14, and the diameter of the tail rod 17 is smaller than that of the positioning section 16; the outer wall surface of the positioning section 16 is also integrally connected with a plurality of cross-shaped wing plates 20 with cross-shaped longitudinal sections, the cross-shaped wing plates are uniformly distributed on the periphery of the positioning section 16, and the cross-shaped wing plates 20 extend leftwards from the right end of the positioning section 16 to the left end of the positioning section 16 along the axial direction of the main rod 4; the outer nail body is formed by enclosing a plurality of pipe fittings 2 which are arc-shaped in longitudinal section and coaxial with the main rod, the left ends of the pipe fittings 2 are clamped with the edge of the bottom end face of the pointed end 1, the pipe fittings 2 are uniformly distributed around the axis of the main rod 4, gaps are reserved between the adjacent pipe fittings 2, and external threads A21 are arranged on the outer wall surface of each pipe fitting 2; a sleeve A13 matched with the extrusion head 14 is fixedly arranged at the left end of an inner cavity formed by mutually enclosing the pipe fittings 2, arc wing holes 12 penetrating through two end faces of the pipe fittings 2 are further arranged on the surfaces of two side walls of the pipe fittings 2, the arc wing holes 12 between the adjacent pipe fittings 2 and a gap form a cross-shaped sliding groove matched with the cross-shaped wing plate 20 for use, and the positioning pipe is connected with the pipe fittings 2 in a sliding manner; the right end of the pipe fitting 2 is further screwed with a fixing cap A6, the right end of the tail rod 17 penetrates through the top wall of the fixing cap A6 and extends rightwards, a central hole coaxial with the main rod 4 is further formed in the tail rod 17, the main rod 4 extends into the central hole, the right end of the tail rod is further provided with a fixing cap B7., the center of the left end face of the fixing cap B7 is provided with a sleeve B19 extending inwards the central hole, the inner surface of the sleeve B19 is provided with internal threads and is in threaded connection with the right end of the main rod 4, the outer wall surface of the tail rod 17 on one side of the left end face of the fixing cap B7 is further fixedly connected with a hexagonal fixing block 18, and the distance between the left end face of the hexagonal fixing block 18 and the right end face of the fixing cap A6 is larger than the;
the cross-shaped wing plate 20 comprises an arc-shaped wing plate 201 matched with the arc-shaped wing hole 12, the arc-shaped wing plate 201 extends towards the left side of the positioning section 16 along the arc-shaped wing hole 12 to form a clamping plate 8, and the clamping plate 8 is made of medical elastic metal materials; the length of the extrusion head 14 is the same as that of the positioning section 16, the diameter of an inner cavity defined by the pipe fitting 2 where the connecting rod 15 is located is equal to that of the positioning section 16, a limit block A5 is fixedly arranged at the right end of the inner cavity defined by the pipe fitting 2 where the connecting rod 15 is located, a limit block A5 is arranged on any pipe fitting 2, the limit block A5 is fixedly connected with the inner wall surface of the pipe fitting 2, and the top end of the limit block A5 is separated from the outer wall surface of the connecting rod 15; the outer wall surface of the left end of the connecting rod is also provided with a limit block B9, and the top end of the limit block B9 is separated from the inner wall surface of the pipe fitting 2; the spring 3 is fixedly connected to the surface of the outer wall of the connecting rod between the limiting block B9 and the right end face of the extrusion head 14, one end of the spring 3 is fixedly connected with the connecting rod 15, the other end of the spring 3 penetrates through the gap and is fixedly connected with the clamping plate 8, and the distance between the limiting block B9 and the limiting block A5 is larger than the length of the extrusion head 14; the clamping plate 8 extends leftwards to the left end of the arc-shaped wing hole 12;
the number of the pipe fittings 2 is 4, and the shape and the size of each pipe fitting 2 are the same;
the external thread A21 enclosed by each pipe fitting 2 forms a thread structure which can be used continuously;
an annular limiting groove 23 surrounding the axis of the main rod 4 is formed in the bottom end face of the pointed end 1, and an arc-shaped convex block 22 clamped with the annular limiting groove is formed in the left end of the pipe fitting 2;
when the left end of the pipe fitting 2 is clamped with the pointed end 1, the inclination of the outer wall surface of the left end of the pipe fitting 2 is the same as that of the outer wall surface of the pointed end 1;
the outer wall surface of the tip 1 is also provided with external threads.
This neotype theory of use:
when in use, the novel nail is embedded into a bone of a patient, the external thread A21 on the outer nail body is used for cutting the bone by rotating the hexagonal fixing block 18, and the novel nail is tightly connected with the bone; in the process, due to the limiting function of the cross-shaped wing plate 20, the pipe fitting 2 cannot be dislocated relatively during rotation, so that the function of tightly fixing the external thread of the traditional bone nail is ensured;
further, when the bone nail is dismantled to needs, only need unscrew locking nut B, unscrew locking nut A again, hand power locking nut A pulls out the location section 16 of registration arm, and at this moment, extrusion head 14 loses the spacing effect of extrusion, and under the pulling of spring 3, splint 8 shrink to 4 directions of mobile jib, can drive 2 undergaugments of pipe fitting to can easily take out the bone nail.
Claims (7)
1. A bone screw for easy removal, characterized by: the nail comprises an inner nail body, an outer nail body and a positioning pipe connected between the inner nail body and the outer nail body, wherein the inner nail body comprises a conical pointed end and a main rod fixedly connected to the conical bottom end surface and extending rightwards along the conical axis, and the right end of the main rod is provided with an external thread; the positioning pipe is sleeved outside the main rod and is in sliding connection with the main rod, the positioning pipe sequentially comprises an extrusion head, a connecting rod, a positioning section and a tail rod which are coaxially and integrally connected from left to right, the extrusion head is of a truncated cone-shaped structure, the area of the left end of the extrusion head is smaller than that of the right end of the extrusion head, the diameter of the connecting rod is smaller than that of the right end face of the extrusion head, the diameter of the positioning section is larger than that of the right end face of the extrusion head, and the diameter of the tail rod is smaller than that of the positioning section; the outer wall surface of the positioning section is also integrally connected with a plurality of cross-shaped wing plates with cross-shaped longitudinal sections, the cross-shaped wing plates are uniformly distributed on the periphery of the positioning section, and the cross-shaped wing plates extend leftwards from the right end of the positioning section to the left end of the positioning section along the axial direction of the main rod; the outer nail body is formed by enclosing a plurality of pipe fittings of which the longitudinal sections are arc-shaped and are coaxial with the main rod, the left ends of the pipe fittings are clamped with the edge of the bottom end face of the pointed end, the pipe fittings are uniformly distributed around the axis of the main rod, gaps are reserved between the adjacent pipe fittings, and external threads A are arranged on the surface of the outer wall of each pipe fitting; the left end of an inner cavity formed by mutually enclosing the pipe fittings is fixedly provided with a sleeve A matched with the extrusion head for use, the surfaces of the two side walls of the pipe fittings are also provided with arc wing holes penetrating through the two end surfaces of the pipe fittings, the arc wing holes between the adjacent pipe fittings and a gap form a cross-shaped sliding chute matched with the cross-shaped wing plate for use, and the positioning pipe is connected with the pipe fittings in a sliding way; the right-hand member of pipe fitting still the spiro union have locking nut A, the right-hand member of tailboom pierce through locking nut A's roof and extend right, still be equipped with the centre bore coaxial with the mobile jib in the tailboom, the mobile jib extend to in the centre bore, the tailboom right-hand member still be equipped with locking nut B the left end face center of locking nut B be equipped with the sleeve pipe B that extends to the centre bore in, sleeve pipe B's internal surface be equipped with the internal thread and with the right-hand member spiro union of mobile jib, the outer wall of the tailboom of locking nut B left end face one side on the surface still fixedly connected with hexagon fixed block, the left end face of hexagon fixed block and the distance between the locking nut A right-hand member face be greater than locking nut A width.
2. An easy to remove bone screw as claimed in claim 1, wherein: the cross-shaped wing plate comprises an arc-shaped wing plate matched with the arc-shaped wing hole, the arc-shaped wing plate extends towards the left side of the positioning section along the arc-shaped wing hole to form a clamping plate, and the clamping plate is made of medical elastic metal materials; the length of the extrusion head is the same as that of the positioning section, the diameter of an inner cavity defined by the pipe fitting where the connecting rod is located is equal to that of the positioning section, a limiting block A is further fixedly arranged at the right end of the inner cavity defined by the pipe fitting where the connecting rod is located, a limiting block A is arranged on any pipe fitting (2), the limiting block A is fixedly connected with the surface of the inner wall of the pipe fitting, and the top end of the limiting block A is separated from the surface of the outer wall of the connecting rod; the outer wall surface of the left end of the connecting rod is also provided with a limiting block B, and the top end of the limiting block B is separated from the inner wall surface of the pipe fitting; a spring is fixedly connected to the surface of the outer wall of the connecting rod between the limiting block B and the right end face of the extrusion head, one end of the spring is fixedly connected with the connecting rod, the other end of the spring penetrates through the gap and is fixedly connected with the clamping plate, and the distance between the limiting block B and the limiting block A is larger than the length of the extrusion head; the clamping plate extends leftwards to the left end of the arc-shaped wing hole.
3. An easy to remove bone screw as claimed in claim 2, wherein: the number of the pipe fittings is 4, and the shape and the size of each pipe fitting are the same.
4. A bone screw for facilitating removal according to any one of claims 1 to 3, wherein: the external thread A formed by enclosing the pipe fittings can be used continuously.
5. A bone screw for facilitating removal according to any one of claims 1 to 3, wherein: the bottom face of the pointed end is provided with an annular limiting groove surrounding the axis of the main rod, and the left end of the pipe fitting is provided with an arc-shaped lug clamped with the annular limiting groove.
6. A bone screw for facilitating removal according to any one of claims 1 to 3, wherein: when the left end of the pipe fitting is clamped with the pointed end, the inclination of the outer wall surface of the left end of the pipe fitting is the same as that of the outer wall surface of the pointed end.
7. A bone screw for facilitating removal according to any one of claims 1 to 3, wherein: the outer wall surface of the pointed end is also provided with external threads.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922402315.XU CN211381712U (en) | 2019-12-27 | 2019-12-27 | Bone nail convenient to take out |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922402315.XU CN211381712U (en) | 2019-12-27 | 2019-12-27 | Bone nail convenient to take out |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211381712U true CN211381712U (en) | 2020-09-01 |
Family
ID=72219170
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922402315.XU Expired - Fee Related CN211381712U (en) | 2019-12-27 | 2019-12-27 | Bone nail convenient to take out |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211381712U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112274236A (en) * | 2020-11-05 | 2021-01-29 | 孙金堂 | Assembled easily-detachable bone nail |
-
2019
- 2019-12-27 CN CN201922402315.XU patent/CN211381712U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112274236A (en) * | 2020-11-05 | 2021-01-29 | 孙金堂 | Assembled easily-detachable bone nail |
| CN112274236B (en) * | 2020-11-05 | 2022-02-01 | 孙金堂 | Assembled easily-detachable bone nail |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200901 Termination date: 20211227 |
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| CF01 | Termination of patent right due to non-payment of annual fee |