CN219229986U

CN219229986U - Anchor with wire

Info

Publication number: CN219229986U
Application number: CN202221276119.8U
Authority: CN
Inventors: 孔庆俊; 黎建波; 高腾; 吕高升
Original assignee: Unitech Chongqing Medical Technology Co ltd
Current assignee: Unitech Chongqing Medical Technology Co ltd
Priority date: 2022-05-25
Filing date: 2022-05-25
Publication date: 2023-06-23
Anticipated expiration: 2032-05-25

Abstract

The utility model discloses a wire anchor, which relates to the technical field of medical appliances and comprises a nail head and a nail body, wherein a slot is formed in one side of the nail body, which faces the nail head; the nail head comprises a supporting part and a mounting part, wherein the mounting part is used for being inserted into the slot and elastically matched with the inner wall of the slot to fix the nail body to the nail head, a wire hole is formed in the supporting part, and the wire hole is located outside the slot. The utility model has the effect of improving the firmness of suture fixation.

Description

Anchor with wire

Technical Field

The utility model relates to the technical field of medical instruments, in particular to a band wire anchor.

Background

The suture anchor is a miniature implant for fixing a suture in a bone, and the bone and soft tissues can be reconnected through the suture, so that the suture anchor is often used in the operation of various joints of a human body.

Common stripline anchors include knock-in stripline anchors and screw-in stripline anchors, wherein the knock-in stripline anchors are used for fixing the position of a suture by knocking the stripline anchor into a bone canal by way of a knock after passing the suture through a wire hole.

However, in the process of knocking the bone tunnel into the knock-in type anchor, plastic deformation can occur to bone mass, so that the bone tunnel becomes thick, the holding force of the anchor is reduced, and the phenomenon of unstable suture fixation caused by loosening of the anchor is easy to occur.

Disclosure of Invention

In order to improve the firmness of suture fixation, the utility model provides a band wire anchor.

The utility model provides a belted line anchor, which adopts the following technical scheme:

the anchor with the wire comprises a nail head and a nail body, wherein a slot is formed in one side, facing the nail head, of the nail body;

the nail head comprises a supporting part and a mounting part, wherein the mounting part is used for being inserted into the slot and elastically matched with the inner wall of the slot to fix the nail body to the nail head, a wire hole is formed in the supporting part, and the wire hole is located outside the slot.

Through adopting above-mentioned technical scheme, during the installation, after the suture passes the line hole, place the pin fin in the bone is said, insert the nail body in the bone is said again to remove the nail body through the mode of beating and make the installation department can peg graft to in the fluting, installation department and nail body are connected through elastic fit's mode, and make the nail body can expand outward and support tight bone inner wall, nail body and pin fin are difficult for breaking away from the bone, play the effect that improves the fixed firm nature of suture.

Optionally, the nail body includes being located the butt wing of fluting week side, be provided with on the installation department and be used for promoting the guide surface of butt wing elastic deformation.

By adopting the technical scheme, when the installation part moves in the slot, the guide surface can push the abutting wing to elastically deform, so that the abutting wing abuts against the inner wall of the bone canal.

Optionally, the two abutment wings are opposite, and the two guide surfaces form a wedge shape.

By adopting the technical scheme, the two guide surfaces form a wedge shape, and the abutting wings can be pushed to deform and move in the moving process of the guide surfaces.

Optionally, the abutment wings and the guide surface form a line contact when abutting.

Through adopting above-mentioned technical scheme, the guide surface contacts with the butt wing line for butt wing travel distance is bigger, and the butt effect is better.

Optionally, the abutment wings and the guide surface form a surface contact when abutting.

Through adopting above-mentioned technical scheme, butt wing and guide surface area of contact increase, butt wing atress is more even, and butt wing and bone way support tight effect better, are difficult for causing the harm to the bone way inner wall.

Optionally, a first clamping portion is arranged between the supporting portion and the mounting portion, and a second clamping portion matched with the first clamping portion is arranged on the abutting wing.

By adopting the technical scheme, the nail body implantation device plays a role in conveniently judging whether the nail body is implanted in place or not and preventing the nail body from retreating.

Optionally, the pin head has seted up the guiding hole along its axial, the guiding hole runs through the opposite both ends of the nail body, set up the groove of stepping down between two guide surfaces, set up on the groove inner wall of stepping down with the coaxial thread groove of guiding hole.

By adopting the technical scheme, the guide hole is used for the auxiliary rod to pass through, and the thread groove is used for being in threaded connection with the end part of the auxiliary rod;

when the auxiliary rod is installed, after the auxiliary rod is in threaded connection with the installation part, the nail head is placed at the bottom of the bone canal, the nail body is sleeved on the outer side of the auxiliary rod, and the auxiliary rod plays a role in guiding the sliding of the nail body;

after installation, the auxiliary rod can be removed by rotating the auxiliary rod.

Optionally, the wire hole axis is perpendicular to the nail body axis, and the butt wing end is provided with a butt wire portion.

By adopting the technical scheme, after the abutting wings are moved, the abutting line parts can abut against the suture lines and limit the movement of the suture lines, so that the effect of fixing the suture lines is further achieved.

Optionally, an end of the supporting portion away from the mounting portion is provided with a smooth arc surface.

By adopting the technical scheme, the nail head is not easy to damage the bottom wall of the bone canal in the process that the nail body moves by the knocking force.

Optionally, the outer wall of the nail body forms a plurality of truncated cone-shaped structures with equal size, and the conical surface of the truncated cone-shaped structure tapers towards the direction of the nail head.

By adopting the technical scheme, after the anchor is installed, the conical surface of the truncated cone-shaped structure plays a role in limiting the anchor from being separated from the bone canal.

In summary, the present utility model includes at least one of the following beneficial effects:

1. the mounting part is connected with the nail body in an elastic fit mode, the nail body can be expanded outwards to tightly press the inner wall of the bone canal, and the nail body and the nail head are not easy to separate from the bone canal, so that the effect of improving the fixation firmness of the suture line is achieved;

2. the first clamping part and the second clamping part are arranged to play a role in conveniently judging whether the nail body is implanted in place or not and preventing the nail body from retreating;

3. the screw thread groove is arranged for the auxiliary rod to connect, and the guide hole is arranged for facilitating the movement of the nail body.

Drawings

FIG. 1 is a schematic view showing the overall structure of the present embodiment 1 of the utility model;

FIG. 2 is a schematic sectional view of the present utility model after the installation of embodiment 1;

FIG. 3 is a schematic view showing the overall structure of the present utility model when it is installed in embodiment 1;

FIG. 4 is a schematic cross-sectional view of the anchor in the uninstalled state according to embodiment 2 of the present utility model;

fig. 5 is a schematic sectional view of the present utility model after the completion of the installation of embodiment 2.

Reference numerals illustrate: 1. a pin head; 11. a support part; 111. a wire hole; 12. a mounting part; 121. a relief groove; 122. a thread groove; 123. a guide surface; 13. a first clamping part; 2. a nail body; 21. a truncated cone-shaped structure; 22. abutting the wing; 221. a second clamping part; 222. a wire abutting part; 23. a guide hole; 24. slotting; 3. an auxiliary lever; 4. and knocking the sleeve.

Detailed Description

The utility model is described in further detail below with reference to fig. 1-5.

Example 1:

referring to fig. 1 and 2, the embodiment of the utility model discloses a wire anchor, which comprises a nail head 1 and a nail body 2, wherein the nail head 1 is used for passing a suture, and the nail body 2 is used for fixing the position of the nail head 1. During installation, the nail head 1 which is penetrated with a suture and connected with the auxiliary rod 3 and the nail body 2 sleeved on the auxiliary rod 3 are inserted into the bone canal, the nail body 2 is moved in a knocking mode, the nail body 2 and the nail head 1 are connected in a clamping mode, the nail body 2 is abutted against the inner wall of the bone canal in an elastic deformation mode while being fixed with the nail head 1, so that the suture is limited to be separated from the bone canal, and the anchor nail can be installed in the bone canal and is not easy to be separated from the bone canal.

Referring to fig. 1, the nail head 1 includes an integrally formed supporting portion 11 and an installation portion 12, a wire hole 111 through which a suture passes is formed in a penetrating manner in a side wall of the supporting portion 11, and one end, far away from the installation portion 12, of the supporting portion 11 is set to be an arc-shaped smooth curved surface, so that in a process of knocking the nail body 2, impact force transmitted to the nail head 1 by the nail body 2 is not easy to damage a bone canal by the nail head 1.

The mounting portion 12 is provided with a relief groove 121 at one end far away from the supporting portion 11, and a thread groove 122 for the auxiliary rod 3 to be in threaded connection is provided on the bottom wall of the relief groove 121. Referring to fig. 3, before installation, the auxiliary rod 3 is in threaded connection with the nail head 1, so that the nail head 1 is convenient to take and install; after the anchor is installed, the auxiliary rod 3 can be rotated, the auxiliary rod 3 and the nail head 1 can be removed after being disconnected, and the anchor is only left in the human body.

Referring to fig. 1, the mounting portion 12 is provided with a plurality of guide surfaces 123 at the peripheral side of the screw groove 122, the guide surfaces 123 gradually incline toward the direction approaching the support portion 11 and away from the axis direction of the screw groove 122, and when the mounting portion 12 is in plug-in fit with the nail body 2, the nail body 2 is driven to abut against the inner wall of the bone canal by the elastic fit of the guide surfaces 123 and the nail body 2. In the present embodiment, it is preferable to use two guide surfaces 123, and the two guide surfaces 123 are located on the opening side of the wire hole 111, respectively.

Referring to fig. 1, the nail body 2 is cylindrical, a slot 24 for inserting the mounting portion 12 is formed in one side of the nail body 1, a portion, close to the nail head 1, of the nail body 2 is separated into two opposite abutting wings 22 through the slot 24, and in the process that the mounting portion 12 is inserted into the slot 24, the abutting wings 22 can be pushed by the guide surface 123, so that the abutting wings 22 are expanded outwards and abut against the inner wall of the bone canal. In the embodiment of the present utility model with different numbers of guide surfaces 123, the number of the abutment wings 22 is consistent with the number of the guide surfaces 123, and the positions of the abutment wings 22 also correspond to the guide surfaces 123, and different numbers of the abutment wings 22 can enable the anchor to have different fixing effects.

Referring to fig. 1 and 3, the nail body 2 is provided with a guide hole 23 for moving the auxiliary rod 3, and the guide hole 23 penetrates through the inner wall of the slot 24 and one end of the nail body 2 away from the abutting wing 22. When the anchor is installed, the auxiliary rod 3 provides a guide for the movement of the nail body 2, so that the nail body 2 is not easy to deviate in the movement process, the nail head 1 can be adjusted to a central position in the movement process of the nail body 2, and after the anchor is installed, the auxiliary rod 3 can be removed through the guide hole 23.

The nail body 2 is provided with a plurality of round platform-shaped structures 21 at equal intervals along the axis direction, the conical surface of the round platform-shaped structures 21 gradually shrink towards the direction close to the nail head 1, and after the installation of the anchor is completed, the round platform-shaped structures 21 play roles in reinforcing the anchor and preventing the nail head 1 from falling off. In other embodiments of the present utility model, other arrangements for restraining the shaft 2 from being dislodged may be used, such as external threads on the outer wall of the shaft 2.

Referring to fig. 1 and 2, the opposing surfaces of the two abutment wings 22 are planes parallel to the axis of the shank. The first clamping parts 13 are arranged on the two sides of the nail head 1, and the first clamping parts 13 are arranged at the end parts of the guide surfaces 123, namely, the connection parts of the supporting parts 11 and the mounting parts 12. The second clamping portion 221 for clamping with the first clamping portion 13 is fixedly connected to the opposite surfaces of the two abutting wings 22, and plays a role in facilitating the judgment of whether the nail body 2 is implanted in place or not and preventing the nail body 2 from retreating. When the first clamping portion 13 and the second clamping portion 221 are matched, the edge position, close to the first clamping portion 13, of the guide surface 123 abuts against the abutting wing 22, and the guide surface 123 and the abutting wing 22 form line contact, so that the moving distance of the abutting wing 22 is larger, and the abutting effect of the abutting wing on the inner wall of the bone canal is better.

The abutting wing 22 includes an abutting line portion 222 at an end portion, and after the nail head 1 and the nail body 2 are fixedly connected, the abutting line portion 222 partially covers the line hole 111, and the abutting line portion 222 can abut against the suture line to limit the movement of the suture line, thereby further fixing the suture line.

The implementation principle of the anchor with the wire in the embodiment of the utility model is as follows: when in installation, the auxiliary rod 3 is in threaded connection with the nail head 1, the nail head 1 is inserted into the bone canal, and the end part of the auxiliary rod 3 penetrates out of the bone canal;

the nail body 2 is sleeved on the auxiliary rod 3, the end part of the auxiliary rod 3 penetrates out of the guide hole 23, and the knocking sleeve 4 is sleeved on the auxiliary rod 3 and abuts against the nail body 2;

knocking the knocking sleeve 4, wherein the knocking sleeve 4 moves to push the nail body 2 to move, and in the moving process of the mounting part 12 along the slot 24, the guide surface 123 gradually pushes the abutting wings 22 to expand outwards, the abutting wings 22 and the inner wall of the bone canal elastically deform, and the abutting line part 222 moves to push the abutting line until the first clamping part 13 and the second clamping part 221 are matched; under the action of the restoring force of the elastic deformation of the abutting wings 22 and the bone canal, the abutting wings can abut against each other, and the anchor is fixed in position and is not easy to separate from the bone canal;

finally, the knocking sleeve 4 is taken down, the auxiliary rod 3 is rotated, and then the auxiliary rod 3 is taken out from the guide hole 23.

Example 2:

the present embodiment differs from embodiment 2 in that the guide surface 123 and the abutment wing 22 are abutted differently.

Referring to fig. 4 and 5, when the shank 2 is not engaged with the head 1, the slot 24 is slightly flared toward the head 1, i.e., the abutment surface of the slot 24 is inclined away from the axis of the head 1 toward the head 1. When the first clamping portion 13 and the second clamping portion 221 are matched, one end of the guide surface 123, which is close to the first clamping portion 13, abuts against the abutting wing 22 to form surface contact, the contact area between the abutting wing 22 and the guide surface 123 is increased, the abutting wing 22 is stressed more uniformly, the abutting wing 22 and the bone canal abut against effect is better, and damage to the inner wall of the bone canal is not easy to occur.

The above embodiments are not intended to limit the scope of the present utility model, so: all equivalent changes in structure, shape and principle of the utility model should be covered in the scope of protection of the utility model.

Claims

1. A belted anchor, characterized by: the novel nail comprises a nail head (1) and a nail body (2), wherein a slot (24) is formed in one side, facing the nail head (1), of the nail body (2);

the nail head (1) comprises a supporting part (11) and a mounting part (12), wherein the mounting part (12) is used for being inserted into a slot (24) and is elastically matched with the inner wall of the slot (24) to fix the nail body (2) to the nail head (1), a wire hole (111) is formed in the supporting part (11), and the wire hole (111) is located outside the slot (24).

2. A belted anchor according to claim 1, wherein: the nail body (2) comprises abutting wings (22) positioned on the periphery of the slot (24), and a guide surface (123) for pushing the abutting wings (22) to elastically deform is arranged on the mounting part (12).

3. A stripline anchor as claimed in claim 2, wherein: the abutment wings (22) are arranged in two and the two abutment wings (22) are opposite, and the guide surfaces (123) are arranged in two and the two guide surfaces (123) form a wedge shape.

4. A strip line anchor as claimed in claim 3, wherein: the abutment wing (22) and the guide surface (123) form a line contact when in abutment.

5. A strip line anchor as claimed in claim 3, wherein: the contact wing (22) and the guide surface (123) form surface contact when in contact.

6. A strip line anchor as claimed in claim 2 or claim 3, wherein: a first clamping part (13) is arranged between the supporting part (11) and the mounting part (12), and a second clamping part (221) matched with the first clamping part (13) is arranged on the abutting wing (22).

7. A strip line anchor as claimed in claim 1 or claim 2, wherein: the nail body (2) is provided with a guide hole (23) along the axial direction of the nail body, the guide hole (23) penetrates through the opposite ends of the nail body (2), a yielding groove (121) is formed between two guide surfaces (123), and a thread groove (122) coaxial with the guide hole (23) is formed in the inner wall of the yielding groove (121).

8. A strip line anchor as claimed in claim 2 or claim 3, wherein: the axis of the wire hole (111) is perpendicular to the axis of the nail body (2), and the end part of the abutting wing (22) is provided with a wire abutting part (222).

9. A belted anchor according to claim 1, wherein: one end of the supporting part (11) far away from the mounting part (12) is provided with a smooth arc-shaped surface.

10. A belted anchor according to claim 1, wherein: the outer wall of the nail body (2) forms a plurality of truncated cone-shaped structures (21) with the same size, and the conical surface of the truncated cone-shaped structures (21) is gradually reduced towards the direction of the nail head (1).