CN219743010U - Femoral stem extractor device with thread and scribing type matched locking structure - Google Patents

Abstract

The utility model relates to a femoral stem extractor device with a thread and scribing type matched locking structure, and belongs to the technical field of medical appliances. The device comprises a hand-held handle, wherein one end of the hand-held handle is connected with a clamping handle which is arranged in an arc shape, one end of the hand-held handle far away from the clamping handle is connected with a guide rod, and a sliding hammer is arranged on the guide rod; the clamping handle is internally provided with an arc clamping piece in sliding connection, one end of the hand-held handle is fixedly provided with a threaded rod, the threaded rod is matched with a screw hole formed in the hand-held handle, and the threaded rod is used for pushing the arc clamping piece to clamp the femur handle. The utility model provides a femoral stem extractor device with a thread and scribing type matched locking structure, which is used for rapidly locking and fixing the neck of a femoral stem and then taking out the femoral stem in a reverse beating manner through being connected with a general sliding hammer. The number of auxiliary equipment can be reduced, the operation time can be shortened, and the operation efficiency can be improved.

Description

Femoral stem extractor device with thread and scribing type matched locking structure

Technical Field

The utility model relates to a femoral stem extractor device with a thread and scribing type matched locking structure, and belongs to the technical field of medical appliances.

Background

The hip joint revision surgery has the advantages that the product design can take out the failed or destroyed femoral stem prosthesis, so that bone loss is reduced as much as possible, fragments caused by the damage to the prosthesis are avoided, the prosthesis is taken out efficiently, the universality is high, and the structure is simple and the cleaning is easy.

Through the research of the prior art, the product structures of different factories are different during hip revision surgery, especially the interface structure of the prosthesis and the surgical tool is also different when the prosthesis is required to be taken out, and a clinician needs to prepare the taking-out tool with various structures in advance, so that the cost is high, the efficiency is low, and the general taking-out tool has good effect on taking out the femoral stem prosthesis. A universal femoral stem prosthesis removal tool was developed in view of this.

Disclosure of Invention

The utility model aims to solve the technical problems that: the utility model provides a overcome prior art's is not enough, provides a screw thread and formula cooperation locking structure femoral stem extractor device, the neck of quick locking fixed femoral stem, then is connected with general sliding hammer and is taken out the femoral stem with the mode of beating down. The number of auxiliary equipment can be reduced, the operation time can be shortened, and the operation efficiency can be improved.

The utility model relates to a femoral stem extractor device with a thread and scribing type matched locking structure, which comprises a handheld stem, wherein one end of the handheld stem is connected with a clamping stem in arc arrangement, one end of the handheld stem, which is far away from the clamping stem, is connected with a guide rod, and a sliding hammer is arranged on the guide rod;

the clamping handle is internally provided with an arc clamping piece in sliding connection, one end of the hand-held handle is fixedly provided with a threaded rod, the threaded rod is matched with a screw hole formed in the hand-held handle, and the threaded rod is used for pushing the arc clamping piece to clamp the femur handle.

Further, a mounting groove is formed in the middle of the clamping handle, a guide groove is formed in one end of the mounting groove, and a deflector rod matched with the guide groove is fixed on the arc-shaped clamping piece.

Further, a clamping hole is formed in the clamping handle, a clamping groove is formed in one end of the arc-shaped clamping piece, and when the arc-shaped clamping piece slides in the clamping handle, the clamping groove coincides with the clamping hole and enables the containing space in the clamping hole to be reduced.

Further, a weight reducing groove is formed in the hand-held handle and used for reducing the weight of the hand-held handle, and the operation is convenient.

Further, the dog is fixed to guide bar one end, prevents that the sliding hammer from sliding out, influences the use.

Further, the guide rod is connected with the hand-held handle through threads, an annular table is arranged at one end of the hand-held handle, a threaded hole for installing the guide rod is formed in the annular table, and the use stability of the sliding hammer is improved.

Compared with the prior art, the utility model has the beneficial effects that:

according to the utility model, the arc-shaped clamping piece in sliding connection is arranged in the clamping handle, the threaded rod is fixed at one end of the hand-held handle and is matched with the threaded hole formed in the hand-held handle, the threaded rod is used for pushing the arc-shaped clamping piece to clamp the femur handle, the neck of the femur handle can be rapidly locked and fixed, and then the femur handle is taken out in a reverse beating and knocking manner through being connected with the universal sliding hammer; in addition, the number of auxiliary equipment can be reduced, the operation time can be shortened, and the operation efficiency can be improved.

Drawings

Fig. 1 is a schematic view of the structure of an uninstalled slide hammer of embodiment 1 of the present utility model;

FIG. 2 is an enlarged view of a portion of FIG. 1 at A;

FIG. 3 is a schematic view of an arc-shaped clamping piece according to embodiment 1 of the present utility model;

FIG. 4 is a schematic structural view of embodiment 1 of the present utility model;

FIG. 5 is a full cross-sectional view of example 1 of the present utility model;

FIG. 6 is a schematic view showing a clamping state structure in embodiment 1 of the present utility model;

in the figure:

1. a clamping handle; 11. a clamping hole; 12. a mounting groove; 13. a guide groove; 2. an arc-shaped clamping piece; 21. a clamping groove; 22. a deflector rod; 3. a handle; 31. a weight reduction groove; 32. an annular table; 33. a threaded hole; 4. a guide rod; 5. a slide hammer; 6. a stop block; 7. a femoral stem.

Detailed Description

Example 1

As shown in fig. 1 to 6, the femoral stem extractor device with the threaded and scribing type matched locking structure comprises a handheld stem 3, wherein one end of the handheld stem 3 is connected with a clamping stem 1 which is arranged in an arc shape, one end of the handheld stem 3, which is far away from the clamping stem 1, is connected with a guide rod 4, and a sliding hammer 5 is arranged on the guide rod 4;

be equipped with sliding connection's arc grip tab 2 in grip handle 1, the fixed threaded rod of hand-held handle 3 one end, the threaded rod is with the screw looks adaptation of seting up in the hand-held handle 3, and the threaded rod is used for promoting arc grip tab 2 centre gripping femur handle 7, drives the threaded rod through rotating hand-held handle 3 and rotates, and the threaded rod tip promotes arc grip tab 2 to one end slip, and centre gripping groove 21 and centre gripping hole 11 coincidence this moment grip femur handle 7's neck, as shown in fig. 6.

As shown in fig. 1, the middle part of the clamping handle 1 is provided with a mounting groove 12, one end of the mounting groove 12 is provided with a guide groove 13, a deflector rod 22 matched with the guide groove 13 is fixed on the arc clamping piece 2, and the deflector rod 22 is used for disassembling the arc clamping piece 2 and can be disassembled after being pulled backwards.

As shown in fig. 2, the clamping handle 1 is provided with a clamping hole 11, one end of the arc-shaped clamping piece 2 is provided with a clamping groove 21, and when the arc-shaped clamping piece 2 slides in the clamping handle 1, the clamping groove 21 is overlapped with the clamping hole 11, so that the accommodating space in the clamping hole 11 is reduced.

As shown in fig. 1, the handle 3 is provided with a weight-reducing groove 31.

As shown in fig. 4, one end of the guide rod 4 is fixed with a stopper 6.

As shown in fig. 1, the hand-held handle 3 is in threaded connection with the guide rod 4, one end of the hand-held handle 3 is provided with an annular table 32, and a threaded hole 33 for installing the guide rod 4 is formed in the annular table 32.

Working process or working principle:

when the femoral stem 7 is used, the hand-held handle 3 is rotated, the threaded rod is driven to rotate, the threaded rod pushes the arc-shaped clamping piece 2 to move towards one end under the cooperation of threads in the clamping handle 1, the clamping groove 21 formed in the front end of the arc-shaped clamping piece 2 is matched with the clamping hole 11, the neck of the femoral stem 7 is clamped in the clamping hole 11, the sliding hammer 5 can be utilized to strike at the moment, and finally the femoral stem is taken out.

The description of the directions and the relative positional relationships of the structures, such as the description of the front, back, left, right, up and down, in the present utility model does not limit the present utility model, but is merely for convenience of description.

Claims (6)

1. The femoral stem extractor device with the threaded and scribing type matched locking structure is characterized by comprising a handheld stem (3), wherein one end of the handheld stem (3) is connected with a clamping stem (1) which is arranged in an arc shape, one end of the handheld stem (3) far away from the clamping stem (1) is connected with a guide rod (4), and a sliding hammer (5) is arranged on the guide rod (4);

the clamping handle (1) is internally provided with an arc clamping piece (2) which is in sliding connection, one end of the hand-held handle (3) is fixed with a threaded rod, the threaded rod is matched with a threaded hole formed in the hand-held handle (3), and the threaded rod is used for pushing the arc clamping piece (2) to clamp the femur handle (7).

2. The femoral stem extractor device with the threaded and scribing type matched locking structure according to claim 1, wherein a mounting groove (12) is formed in the middle of the clamping handle (1), a guide groove (13) is formed in one end of the mounting groove (12), and a deflector rod (22) matched with the guide groove (13) is fixed on the arc-shaped clamping piece (2).

3. The femoral stem extractor device with the threaded and scribed matching locking structure according to claim 1 or 2, wherein the clamping hole (11) is formed in the clamping handle (1), the clamping groove (21) is formed in one end of the arc-shaped clamping piece (2), and when the arc-shaped clamping piece (2) slides in the clamping handle (1), the clamping groove (21) is overlapped with the clamping hole (11) and enables the containing space in the clamping hole (11) to be reduced.

4. A femoral stem extractor device of screw and chip type mating locking construction according to claim 3, characterized in that the hand-held stem (3) is provided with a weight-reducing groove (31).

5. The femoral stem extractor device of the threaded and scored matching locking structure according to claim 1, characterized in that one end of the guide rod (4) is fixed with a stop (6).

6. The femoral stem extractor device with the threaded and scribed matching locking structure according to claim 5, wherein the hand-held stem (3) is connected with the guide rod (4) in a threaded manner, one end of the hand-held stem (3) is provided with an annular table (32), and a threaded hole (33) for installing the guide rod (4) is formed in the annular table (32).