CN218305088U

CN218305088U - Bone screw device

Info

Publication number: CN218305088U
Application number: CN202222661546.4U
Authority: CN
Inventors: 杨庆; 陈农; 付文芹
Original assignee: Qingpu Branch Of Zhongshan Hospital Affiliated To Fudan University Shanghai Qingpu District Central Hospital
Current assignee: Qingpu Branch Of Zhongshan Hospital Affiliated To Fudan University Shanghai Qingpu District Central Hospital
Priority date: 2022-10-10
Filing date: 2022-10-10
Publication date: 2023-01-17
Anticipated expiration: 2032-10-10

Abstract

The utility model provides a bone screw device, which belongs to the technical field of orthopedics auxiliary instruments, wherein the bone screw device comprises a connecting rod, a guide groove extending along the side length direction of the connecting rod is arranged on the connecting rod, and the guide groove is communicated with the connecting rod; at least one fixing piece penetrates through the guide groove, the fixing piece is provided with a through hole, and at least part of the fixing piece is abutted against the connecting rod; at least one bone nail is configured to pass the mounting and with perforation threaded connection, the one end of bone nail passing the mounting can penetrate in the skeleton to make the mounting driven by the bone nail to support tight connecting rod. When the bone nail is not driven into the framework, the position of the fixing piece in the guide groove can be flexibly adjusted; when the skeleton is squeezed into to the bone nail, the bone nail is fixed on the connecting rod by the stable fixing piece, is favorable to keeping joint strength and the stability of bone nail in long-term use, even appear not hard up, also can not drop, has avoided the condition of fixing piece slippage connecting rod, has promoted the safety in utilization performance of bone nail device.

Description

Bone screw device

Technical Field

The utility model relates to an orthopedics auxiliary instrument technical field especially relates to a bone nail device.

Background

In bone surgery, bone screws are often used to connect broken bones or to correct various bone pathologies and deformities. As the skeleton is a main stress structure for bearing various mechanical loads by a human body, the broken bone after connection or the corrected skeleton easily transfers the borne force load to the bone nail for fixation, and the requirement of the bone nail for bearing the connection strength is higher.

In the prior art, the bone nail is directly clamped on the connecting rod through the chuck, and after the bone nail is driven into the bone, once the chuck accidentally slips, the bone nail easily falls off from the connecting rod, so that the stability after integral connection is influenced, the bone nail is laid down again, and the bone nail after the slipping off is also easy to generate potential safety hazards such as a stabbing person.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model aims at providing a bone nail device to solve the relatively poor problem of being connected validity between bone nail and the connecting rod among the prior art.

Based on the above-mentioned purpose, the utility model provides a bone screw device, include:

the connecting rod is provided with a guide groove extending along the side length direction of the connecting rod, and the guide groove penetrates through the connecting rod;

the fixing piece is slidably arranged in the guide groove in a penetrating way and is provided with a through hole, and at least part of the fixing piece is abutted against the connecting rod;

at least one bone nail is configured to penetrate through the through hole and is in threaded connection with the through hole, and one end of the bone nail penetrating through the through hole can penetrate into the framework, so that the fixing piece is driven by the bone nail to abut against the connecting rod.

Further, the fixing member includes: the bone screw comprises a guide part extending into the guide groove and a penetration preventing part exposed out of the guide groove, wherein the guide part is used for being in threaded connection with the bone screw, and the penetration preventing part is used for being overlapped with the guide groove.

Further, the penetration preventing portion is configured as an annular boss having an outer diameter larger than a groove width of the guide groove.

Furthermore, a plurality of gaps are arranged on the top surface of the annular boss at intervals along the circumferential direction of the annular boss, each gap penetrates through the annular boss along the radial direction of the annular boss, and the gaps allow the through hole of the annular boss to be expanded or contracted.

Further, the fixing device also comprises a fixing cap, and the fixing cap can be sleeved on and fasten the annular boss so as to tighten the gap.

Further, the part of the bone nail located in the annular boss is configured to be prism-shaped.

Further, the part of the bone nail located in the annular boss is configured to be hexagonal prism-shaped.

Further, the bone nail comprises: the bone nail comprises a first thread section for driving into a skeleton and a second thread section for being in threaded connection with the fixing piece, wherein the end face of one end of the bone nail, far away from the first thread section, is a special-shaped end face.

Furthermore, the end face of one end of the bone nail far away from the first thread section is semicircular.

Further, the fixing piece is provided with four fixing pieces positioned on the connecting rod, and the bone nails are matched with the fixing piece in arrangement.

As can be seen from the above, the fixing member of the bone screw device provided by the utility model is slidably inserted into the guiding groove, and when the bone screw is not driven into the framework, the position of the fixing member in the guiding groove can be flexibly adjusted; because the at least part and the connecting rod overlap joint of mounting, bone nail and perforation threaded connection, when the skeleton is squeezed into to the bone nail, constantly remove to the skeleton direction along with the bone nail, the part of mounting butt on the connecting rod is driven by the bone nail and supports tight connecting rod gradually to make the bone nail by the stable fixed connection of mounting on the connecting rod, this is provided with and does benefit to joint strength and the stability that keeps the bone nail in long-term use. Even if the bone nail device is loosened, the bone nail device cannot fall off, the situation that the fixing piece slips off the connecting rod is avoided, and the use safety performance of the bone nail device is improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a perspective view of a bone screw device in an embodiment of the present invention;

fig. 2 is a schematic cross-sectional view of a bone screw device according to an embodiment of the present invention;

fig. 3 is a schematic structural view of a fixing member in an embodiment of the present invention;

FIG. 4 is a schematic cross-sectional view of a fixing member according to an embodiment of the present invention;

FIG. 5 is a schematic view of the assembly of the bone screw and the fixing member according to the embodiment of the present invention;

fig. 6 is a bottom view of the locking cap according to the embodiment of the present invention;

fig. 7 is a schematic structural view of a bone nail according to an embodiment of the present invention;

fig. 8 is a schematic view of the assembly of the bone nail, the fixing member and the fixing cap according to the embodiment of the present invention.

Description of reference numerals:

1. a connecting rod; 11. a guide groove;

2. a fixing member; 21. perforating; 22. a guide portion; 23. an annular boss; 24. opening the gap;

3. bone nails; 31. a first thread segment; 32. a second thread segment; 33. a special-shaped end face;

4. a fixing cap; 41. and a through hole.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail with reference to the accompanying drawings.

It should be noted that unless otherwise defined, technical or scientific terms used in the embodiments of the present invention should have the ordinary meaning as understood by those having ordinary skill in the art to which the present disclosure belongs. The use of "first," "second," and the like in this disclosure is not intended to indicate any order, quantity, or importance, but rather is used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that the element or item listed before the word covers the element or item listed after the word and its equivalents, but does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used only to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.

The embodiment provides a bone screw device which is applied to various skeleton pathological scenes such as broken bones or correction in orthopedic surgery.

As shown in fig. 1 and 2, the bone screw device includes a connecting rod 1, at least one fixing member 2, and at least one bone screw 3, wherein a guide groove 11 extending along a length direction (e.g., a length direction) of the connecting rod 1 is provided on the connecting rod 1, the guide groove 11 is disposed through the connecting rod, the at least one fixing member 2 is slidably disposed through the guide groove 11, the fixing member 2 has a through hole 21, at least a portion of the fixing member 2 overlaps the connecting rod 1, the at least one bone screw 3 is configured to pass through the fixing member 2 and be in threaded connection with the through hole 21, and an end of the bone screw 3 passing through the fixing member 2 can be driven into a skeleton, so that the fixing member 2 is driven by the bone screw 3 to abut against the connecting rod 1.

As can be seen from the above, in the bone screw device provided in the present embodiment, the fixing member 2 is slidably disposed in the guide groove 11, so that when the bone screw 3 is not driven into the frame, the position of the fixing member 2 in the guide groove 11 can be flexibly adjusted; because the at least part of mounting 2 and 1 overlap joint of connecting rod, bone nail 3 and perforation 21 threaded connection, when bone nail 3 squeezes into the skeleton, constantly remove to the skeleton direction along with bone nail 3, the part of the butt of mounting 2 on connecting rod 1 is driven by bone nail 3 and supports tight connecting rod 1 gradually, thereby make bone nail 3 by the stable fixed connection of mounting 2 on connecting rod 1, this setting is favorable to keeping joint strength and the stability of bone nail 3 in long-term use, and simultaneously, also avoid the condition that slippage connecting rod 1 appears in mounting 2, the safety in utilization performance of bone nail device has been promoted.

In some embodiments, the connecting rod 1 is made of carbon fiber material, and the connecting rod 1 is preferably cylindrical, and the diameter of the two ends of the connecting rod 1 is larger than that of the portion with the guide groove 11 in the middle, so as to further improve the overall structural strength of the connecting rod 1. The guiding groove 11 is a strip-shaped groove arranged on the connecting rod 1, and the strip-shaped groove is symmetrically distributed along the axis of the connecting rod 1 so as to ensure that the stress of the connecting rod 1 is uniform.

As shown in fig. 1, in some embodiments, the fixing members 2 have four fixing members on the connecting rod 1, and the bone screws 3 are arranged in four matching with each fixing member 2, however, the number of the fixing members 2 and the bone screws 3 is only illustrated in this embodiment, and the bone screws 3 and the fixing members 2 may be arranged in other numbers according to different practical use scenarios.

In some embodiments, as shown in fig. 3, 4 and 5, the fixing member 2 includes a guide portion 22 protruding into the guide groove 11, and a penetration preventing portion exposing the guide groove 11, the penetration preventing portion being configured as an annular boss 23 having an outer diameter larger than a groove width of the guide groove 11. The fixing member 2 has a hollow cylindrical shape as a whole, and the inner diameter of the guide portion 22 has an internal thread for coupling with the bone screw 3, and the outer portion of the guide portion 22 is smooth so as to freely slide in the guide groove 11. The annular boss 23 has an annular end face overlapping the end face of the connecting rod 1, and the penetration preventing portion is arranged to be the annular boss 23, so that the stability of overlapping action when the fixing part 2 is pulled by the bone nail 3 can be improved.

As an alternative embodiment, the penetration preventing portion may also be provided as a portion of the fixing member 2 overlapping, for example, the penetration preventing portion may overlap the guide groove 11 in a triangular distribution; as an alternative embodiment, the fastening element 2 may also be designed as a prism, and its penetration-preventing part may also be designed as a prism projection, as long as it can be stably lapped over the end of the guide groove 11.

In some embodiments, the annular boss 23 is provided with a plurality of gaps 24 opened along the axial direction thereof, each gap 24 is uniformly arranged along the circumferential direction of the annular boss 23, and the opening direction of each gap 24 is away from the connecting rod 1. Further, as shown in fig. 6 and 8, the fixing device further includes a fixing cap 4, and the fixing cap 4 can be sleeved on the annular boss 23 and is in threaded connection with the annular boss 23. Herein, also offer the through-hole 41 that is used for wearing to establish bone nail 3 on the locking cap 4, at the connection process, a plurality of openings 24 are retrained by locking cap 4 and are shrunk to make cyclic annular boss 23 can hug closely the outer surface of bone nail 3, play the effect of increase friction, effectively strengthened the connection effect between bone nail 3 and the mounting 2.

In the above embodiment, the portion of the bone nail 3 located in the annular boss 23 is configured to be prism-shaped, specifically, the portion of the bone nail 3 located in the annular boss 23 is configured to be hexagon-prism-shaped, one end of the fixing cap 4 is screwed with the fixing member 2, and the other end is sleeved on the prism-shaped outer surface of the bone nail 3, which can prevent the fixing cap 4 and the bone nail 3 from rotating relatively, thereby maintaining the fastening effect of the fixing cap 4 on the fixing member 2.

In some embodiments, the portion of the bone screw 3 located inside the annular boss 23 may also be configured as other prisms, such as a quadrangular prism or a pentagonal prism, etc.

In some embodiments, as shown in fig. 7, the bone nail 3 comprises: the bone nail comprises a first thread section 31 used for driving into a skeleton and a second thread section 32 used for being in threaded connection with the fixing part 2, wherein the end face of one end of the bone nail 3 far away from the first thread section 31 is a special-shaped end face 33. Specifically, one end of the bone nail 3, which is used for being driven into the framework, is conical so as to facilitate better puncture into the framework; the end face of one end of the bone nail 3, which is far away from the first thread section 31, is semicircular, and a certain length of one end of the bone nail 3, which is far away from the first thread section 31, is a semicircular section, so that medical staff can further conveniently operate tools to sleeve the bone nail 3, and the medical staff can conveniently rotate the bone nail 3. Here, the end surface of the bone nail 3 far from the first thread section 31 may be in other shapes, such as a prism shape, as long as it is beneficial for a matching tool to be sleeved into the bone nail 3 for screwing action.

In some embodiments, the bone screw 3 may be provided with a threaded section throughout for threaded connection with both the fixture 2 and the frame.

The use principle is as follows:

firstly, the guide part 22 of one fixing piece 2 penetrates into the guide groove 11, and the annular boss 23 of the fixing piece 2 is lapped on the guide groove 11; then the bone nail 3 is penetrated from the annular boss 23 of the fixing part 2, and the fixed second thread section 32 is connected with the guide part 22 of the fixing part 2 in a threaded way and screwed to penetrate through the fixing part 2; when the bone nail 3 is screwed to the annular boss 23 and is positioned at the tail end of the second thread section 32, the fixing cap 4 is sleeved on the annular boss 23 and is in threaded connection with the annular boss 23, and the gap 24 of the annular boss 23 is reduced under the constraint action of the fixing cap 4, so that the annular boss 23 tightly holds the outer wall surface of the bone nail 3, and the stable connection between the bone nail 3 and the fixing piece 2 is formed; when using, connecting rod 1 supports in a certain department of skeleton, along with the first screw thread section 31 screw in skeleton of bone nail 3, the mounting 2 on connecting rod 1 is driven by bone nail 3 and makes cyclic annular boss 23 support connecting rod 1 gradually to constitute the steady state of bone nail 3, connecting rod 1 and mounting 2 from this.

Those of ordinary skill in the art will understand that: the discussion of any embodiment above is meant to be exemplary only, and is not intended to intimate that the scope of the disclosure, including the claims, is limited to these examples; within the idea of the invention, also technical features in the above embodiments or in different embodiments can be combined, steps can be implemented in any order, and there are many other variations of the different aspects of the invention as described above, which are not provided in detail for the sake of brevity.

The present embodiments are intended to embrace all such alternatives, modifications and variances which fall within the broad scope of the appended claims. Therefore, any omission, modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included within the protection scope of the present invention.

Claims

1. A bone screw device, comprising:

the connecting rod (1) is provided with a guide groove (11) extending along the side length direction of the connecting rod, and the guide groove (11) penetrates through the connecting rod (1);

at least one fixing piece (2) penetrates through the guide groove (11) in a sliding mode, the fixing piece (2) is provided with a through hole (21), and at least part of the fixing piece (2) is in butt joint with the connecting rod (1);

at least one bone nail (3) is configured to penetrate through the through hole (21) and be in threaded connection with the through hole (21), and one end, penetrating through the through hole (21), of the bone nail (3) can penetrate into a framework, so that the fixing piece (2) is driven by the bone nail (3) to abut against the connecting rod (1).

2. Bone screw device according to claim 1, characterized in that said fixing element (2) comprises: the bone screw comprises a guide part (22) extending into the guide groove (11) and a penetration preventing part exposed out of the guide groove (11), wherein the guide part (22) is used for being in threaded connection with the bone screw (3), and the penetration preventing part is used for being overlapped with the guide groove (11).

3. Bone screw device according to claim 2, characterized in that said penetration preventing portion is configured as an annular boss (23) having an outer diameter larger than the groove width of said guide groove (11).

4. A bone screw device according to claim 3, wherein said annular boss (23) is provided with a plurality of slits (24) at intervals along its circumferential direction, each slit (24) passing through in the radial direction of said annular boss (23), said slits (24) allowing the through hole (21) of said annular boss (23) to be expanded or contracted.

5. A bone screw device according to claim 4, further comprising a securing cap (4), said securing cap (4) being able to sleeve and tighten said annular boss (23) to tighten said gap (24).

6. Bone screw device according to claim 5, characterized in that the part of the bone screw (3) located inside the annular boss (23) is configured as prism-shaped.

7. Bone screw device according to claim 6, characterized in that the part of the bone screw (3) located inside the annular boss (23) is configured as a hexagonal prism.

8. Bone screw device according to claim 1, characterized in that said bone screw (3) comprises: the bone nail comprises a first thread section (31) for driving a skeleton and a second thread section (32) for being in threaded connection with the fixing piece (2), wherein the end face, far away from the first thread section (31), of the bone nail (3) is a special-shaped end face.

9. Bone screw device according to claim 8, characterized in that the end surface of the bone screw (3) remote from the first threaded section (31) is semicircular.

10. Bone screw device according to claim 1, characterized in that said fixing element (2) has four on said connecting rod (1), said bone screw (3) being arranged matching said fixing element (2).