CN211300291U

CN211300291U - Last nail subassembly of staple

Info

Publication number: CN211300291U
Application number: CN201921055209.2U
Authority: CN
Inventors: 张继东; 鲍野; 刘三
Original assignee: Tianjin Zhengtian Medical Instrument Co Ltd
Current assignee: Tianjin Zhengtian Medical Instrument Co Ltd
Priority date: 2019-07-08
Filing date: 2019-07-08
Publication date: 2020-08-21
Anticipated expiration: 2029-07-08

Abstract

The utility model discloses a nail feeding component of a lock nail, which comprises a screw head, an extension rod and an operating piece, wherein the screw head is connected with the rod part of the lock nail; the extension rod is connected to one end of the screw head far away from the rod part of the locking screw in a breakable manner, and the axis of the extension rod is superposed with the axis of the locking screw; the operating part includes interconnect's grafting portion and cover pipe portion, and grafting portion can overlap and establish on the screw head to can drive the lock nail to rotate around the axis under the exogenic action, cover pipe portion is hollow structure and grafting portion intercommunication, and when grafting portion cover was established on the screw head, the extension rod stretched into in the cover pipe portion. The operation part and the screw head in the utility model can be effectively matched, so that the operation is convenient and reliable.

Description

Last nail subassembly of staple

Technical Field

The utility model belongs to the technical field of orthopedic implant, especially, relate to a last nail subassembly of lock nail.

Background

At present clinically, mainly cooperate through hexagonal spanner and the locking nail that has interior hexagonal counter bore when nailing to intramedullary nail locking nail, twist the locking nail into the main nail through the hexagonal spanner. However, in the operation process, the hexagonal head of the hexagonal wrench and the hexagonal hole of the locking nail cannot be effectively matched, for example, if the force is too strong in the operation, the hexagonal hole of the locking nail is easily deformed, and the operation is inconvenient.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the utility model provides an go up nail subassembly of lock nail solves among the prior art unable effective cooperation of lock nail and hexagonal spanner, the inconvenient problem of operation.

The utility model discloses a last nail subassembly of lock nail, include:

a screw head connected with the rod part of the locking screw;

the extension rod is connected to one end, away from the rod part of the locking nail, of the screw head in a breakable manner, and the axis of the extension rod is overlapped with the axis of the locking nail;

the operating part comprises an inserting part and a sleeve part which are connected with each other, the inserting part can be sleeved on the screw head and can drive the locking screw to rotate around an axis under the action of an external force, the sleeve part is of a hollow structure and is communicated with the inserting part, and when the inserting part is sleeved on the screw head, the extension rod extends into the sleeve part.

Above technical scheme is preferred, the extension rod includes the body of rod and connecting portion, the one end of connecting portion with the body of rod is connected, the other end with the terminal surface of screwhead is connected, the terminal surface area of the other end of connecting portion is less than the terminal surface area of screwhead.

Above technical scheme is preferred, be equipped with the recess on the terminal surface of screwhead, the other end of connecting portion is connected on the recess inner wall.

Above technical scheme is preferred, the inner wall of recess is partial spherical surface.

Above technical scheme is preferred, connecting portion are coniform, the body of rod is cylindric, the one end of connecting portion be the tip and with the screwhead is connected, the other end of connecting portion is the main aspects, the main aspects diameter with the diameter of the body of rod is the same.

Preferably, in the above technical solution, the extension rod and the screw head are integrally formed.

Above technical scheme is preferred, the extension rod with all be provided with the attenuate hole on the screw head, two the axis in attenuate hole all with the coincidence of lock pin axis, and two the attenuate hole communicates each other.

Preferably, in the above technical scheme, at least one positioning plane is arranged on the outer side surface of the screw head, the shape of the inner wall of the insertion part is the same as that of the outer side surface of the screw head, and the inner wall of the insertion part can be attached to the outer side surface of the screw head.

Preferably, the screw head is of an outer hexagonal structure, and the inserting part is of an inner hexagonal structure.

In the above technical solution, preferably, one end of the bushing portion of the operating element, which is away from the insertion portion, is provided with a rotating portion, and a length direction of the rotating portion is perpendicular to an axis of the bushing portion.

The utility model has the advantages and positive effects that: the utility model provides a nail feeding component of a locking nail, which comprises a screw head, an extension rod and an operating piece; the extension rod is connected with one end of the screw head far away from the rod part of the locking nail in a breakable way; the operating part comprises an inserting part and a sleeve part which are connected with each other, the inserting part can be sleeved on the screw head and drives the locking screw to rotate around the axis under the action of external force, and when the inserting part is sleeved on the screw head, the extension rod can extend into the sleeve part; the operating part and the screw head can be effectively matched, so that the operation is convenient and reliable.

Drawings

Fig. 1 is a schematic structural view of a locking pin and an extension rod according to an embodiment of the present invention;

FIG. 2 is a cross-sectional view A-A of FIG. 1;

FIG. 3 is an enlarged view of a portion of FIG. 1 at I;

FIG. 4 is a schematic view of an operating member according to an embodiment of the present invention;

FIG. 5 is a cross-sectional view B-B of FIG. 4;

fig. 6 is a schematic structural diagram of a nail feeding assembly according to an embodiment of the present invention.

Wherein: 1. locking nails; 11. a screw head; 12. a rod portion; 111. a groove;

2. an extension pole; 21. a rod body; 22. a connecting portion; 23. thinning the hole;

3. an operating member; 31. a plug-in part; 32. a sleeve portion; 33. a rotating part; 311. a first inner bore; 321. a second bore.

Detailed Description

It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.

The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

The intramedullary nail locking nail product among the prior art adopts the design of hexagonal counter bore, and in operation process, the hexagonal head that often appears the hexagonal spanner can not effectively cooperate with the locking nail hexagonal hole, and fixes a position inaccurately, if too violent hard, causes the hexagonal hole to warp easily, and the operation is inconvenient. To this end, the present embodiment provides a nail feeding assembly of a lock nail, as shown in fig. 1-6, the nail feeding assembly of the lock nail includes a lock nail 1, an extension rod 2 and an operating member 3. The locking nail 1 comprises a rod part 12 and a screw head 11 connected with the rod part 12 of the locking nail 1; the extension rod 2 is connected to one end of the screw head 11 far away from the rod part 12 of the locking nail 1 in a breakable manner, and the axis of the extension rod 2 is superposed with the axis of the locking nail 1; the operating part 3 comprises a plug part 31 and a sleeve part 32 which are connected with each other, the plug part 31 can be sleeved on the screw head 11 and can drive the locking screw 1 to rotate around an axis under the action of external force, the sleeve part 32 is of a hollow structure and is communicated with the plug part 31, and when the plug part 31 is sleeved on the screw head 11, the extension rod 2 extends into the sleeve part 32. In the last nail subassembly of this lock nail, operating parts 3 cover is established on screwhead 11 and extension rod 2, at last nail in-process, operating parts 3 can with screwhead 11 effective cooperation, convenient operation is reliable.

The extension rod 2 comprises a rod body 21 and a connecting part 22, one end of the connecting part 22 is connected with the rod body 21, the other end of the connecting part 22 is connected with the end face of the screw head 11, and the area of the end face of the other end of the connecting part 22 is smaller than that of the end face of the screw head 11, so that the extension rod 2 is easily broken at the connecting part 22 and separated from the screw head 11. The end surface of the screw head 11 is provided with a groove 111, and the other end of the connecting part 22 is connected to the inner wall of the groove 111. The inner wall of the recess 111 has a partially spherical surface. The groove 111 is arranged to reduce the resistance to fracture, and the shape of the partial spherical surface of the groove 111 prevents the extension rod 2 from generating a significant bulge on the end surface of the screw head 11 after being fractured. In addition, in other embodiments, the shape of the groove 111 may be other shapes, and is not limited to the above-mentioned partially spherical shape.

The connecting portion 22 is in a circular truncated cone shape, the rod body 21 is in a cylindrical shape, one end of the connecting portion 22 is a small end and is connected with the screw head 11, the other end of the connecting portion 22 is a large end, and the diameter of the large end is the same as that of the rod body 21. To facilitate machining, the extension rod 2 is optionally integrally formed with the screw head 11.

All be provided with attenuate hole 23 on extension rod 2 and the screwhead 11, the axis of two attenuate holes 23 all with the coincidence of lock nail 1 axis, and two attenuate holes 23 intercommunication each other. The thinning holes 23 can reduce the wall thickness of the connection part of the extension rod 2 and the screw head 11, so that the extension rod 2 can be broken easily.

At least one positioning plane is arranged on the outer side surface of the screw head 11, the shape of the inner wall of the connecting part 22 is the same as that of the outer side surface of the screw head 11, and the inner wall of the connecting part 22 can be attached to the outer side surface of the screw head 11. In the present embodiment, the screw head 11 has an outer hexagonal structure, and the socket 31 has an inner hexagonal structure. Specifically, the insertion part 31 is provided with a first inner hole 311, the shape of the first inner hole 311 is matched with the shape of the outer side surface of the screw head 11, and the first inner hole 311 is of an inner hexagonal hole structure. The sleeve portion 32 is provided with a second inner hole 321, the shape of the second inner hole 321 is matched with the external shape of the extension rod 2, and the second inner hole 321 is communicated with the first inner hole 311. The length of the second bore 321 is greater than or equal to the length of the extension rod 2. The sleeve part 32 of the operating element 3 is provided with a rotating part 33 at one end far away from the plug part 31, and the length direction of the rotating part 33 is vertical to the axis of the sleeve part 32. The extension rod 2 extends into the operation part 3, the operation part 3 and the extension rod 2 can be ensured to be basically in a state of overlapping the axes, and the relative sliding or slipping between the operation part 3 and the screw head 11 can not occur in the process of rotating the operation part 3, so that the nailing operation can be stably and conveniently carried out.

The working process of the embodiment: the extension rod 2 extends into the second inner hole 321 of the sleeve part 32, the screw head 11 extends into the first inner hole 311 of the insertion part 31, the rotating part 33 is rotated to screw the lock nail 1, the extension rod 2 can play a role in guiding under the limiting effect of the second inner hole 321, and the relatively stable and accurate positioning in the process of screwing the lock nail can be guaranteed. When the locking nail 1 is locked with the main nail, the device of the operating part 3 is removed, and the extension rod 2 is broken. This embodiment simple structure, convenient operation easily processes.

While one embodiment of the present invention has been described in detail, the description is only a preferred embodiment of the present invention, and should not be considered as limiting the scope of the present invention. All the equivalent changes and improvements made according to the application scope of the present invention should still fall within the patent coverage of the present invention.

Claims

1. A staple feeding assembly of a staple, comprising:

a screw head (11) connected to a shank (12) of the locking screw (1);

an extension rod (2) which is connected with one end of the screw head (11) far away from the rod part (12) of the locking nail (1) in a breaking way, and the axis of the extension rod (2) is coincident with the axis of the locking nail (1);

the operating piece (3) comprises an inserting part (31) and a sleeve part (32) which are connected with each other, the inserting part (31) can be sleeved on the screw head (11) and can drive the locking screw (1) to rotate around an axis under the action of an external force, the sleeve part (32) is of a hollow structure and is communicated with the inserting part (31), and when the inserting part (31) is sleeved on the screw head (11), the extension rod (2) extends into the sleeve part (32).

2. The staple feeding assembly of claim 1, wherein: the extension rod (2) comprises a rod body (21) and a connecting portion (22), one end of the connecting portion (22) is connected with the rod body (21), the other end of the connecting portion is connected with the end face of the screw head (11), and the end face area of the other end of the connecting portion (22) is smaller than that of the screw head (11).

3. The staple feeding assembly of claim 2, wherein: the end face of the screw head (11) is provided with a groove (111), and the other end of the connecting part (22) is connected to the inner wall of the groove (111).

4. A staple feeding assembly of a locking staple according to claim 3, wherein: the inner wall of the groove (111) is a partial spherical surface.

5. The staple feeding assembly of claim 2, wherein: the connecting portion (22) is conical, the rod body (21) is cylindrical, one end of the connecting portion (22) is a small end and is connected with the screw head (11), the other end of the connecting portion (22) is a large end, and the diameter of the large end is the same as that of the rod body (21).

6. The staple feeding assembly of claim 1, wherein: the extension rod (2) and the screw head (11) are integrally formed.

7. The staple feeding assembly of claim 6, wherein: extension rod (2) with all be provided with attenuate hole (23), two on screwhead (11) the axis in attenuate hole (23) all with lock nail (1) axis coincidence, and two attenuate hole (23) communicate each other.

8. The staple feeding assembly of claim 1, wherein: the outer side face of the screw head (11) is provided with at least one positioning plane, the shape of the inner wall of the insertion part (31) is the same as that of the outer side face of the screw head (11), and the inner wall of the insertion part (31) can be attached to the outer side face of the screw head (11).

9. The staple feeding assembly of claim 8, wherein: the screw head (11) is of an outer hexagonal structure, and the inserting part (31) is of an inner hexagonal structure.

10. The staple feeding assembly of claim 1, wherein: one end, far away from the plugging part (31), of the sleeve part (32) of the operating piece (3) is provided with a rotating part (33), and the length direction of the rotating part (33) is perpendicular to the axis of the sleeve part (32).