Artificial joint with buffer structure
By setting dampers, springs and clamps in the clamping mount of the artificial joint to form a buffer block, the existing artificial hip joints are easily worn when impacted, and better cushioning effect and stability are achieved.
Patent Information
- Application Number
- CN202421046371.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-14
- Publication Date
- 2025-06-10
- Estimated Expiration
- 2034-05-14
AI Technical Summary
The existing artificial hip joints are prone to collision and wear with the femoral cavity when subjected to sudden impact, and lack effective buffering structure.
An artificial joint with a buffer structure is designed, and a damper, a spring and a buffer block are arranged in the mounting part of the clamp column to form a buffer block to achieve a buffer effect.
It effectively improves the buffering effect of artificial joints, reduces collision and wear with the femoral cavity, and improves the stability and service life of the joint.
Smart Images
Figure CN222955570U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of artificial joints, and particularly relates to an artificial joint with a buffer structure. Background Art
[0002] Total hip arthroplasty is one of the major medical inventions that have been widely clinically applied since the 1960s. The implants used, namely artificial hips, have also undergone various improvements and refinements: some adopt a modular structure, such as an assembled type and a mixed type; some adopt a mixed material type in terms of material selection, such as titanium material and hydroxyapatite; some add stability factors in terms of shape, such as grooves and reticulations; some add various coatings on the surface, such as materials with osteocyte induction functions like magnesium or magnesium alloy; some pour bone cement inside, and so on.
[0003] After the existing artificial hip joint is implanted into the human body and replaces the diseased part, the whole artificial hip joint is a rigid body and is in a fixed state relative to the femoral cavity into which it is inserted, without relative displacement. Due to the weight and movement of the human body, a force will naturally be exerted on the artificial hip joint replaced in the femoral cavity. When the artificial hip joint is suddenly impacted, the rigid artificial hip joint and the femoral cavity into which it is placed are extremely likely to collide and wear. Therefore, we have developed an artificial joint with a buffer structure. Summary of the Utility Model
[0004] The main purpose of the utility model is to provide an artificial joint with a buffer structure, which can effectively solve the problems in the background art.
[0005] To achieve the above purpose, the technical solution adopted by the utility model is as follows:
[0006] An artificial joint with a buffer structure includes a femoral stem, a spherical femoral head, and a clamping post. The left end of the clamping post is fixedly connected with a mounting member. The front part and the rear part of the inner wall surface of the mounting member are both provided with sliding grooves. The middle parts of the inner wall surfaces of the two sliding grooves are both fixedly connected with protruding blocks. The right inner wall surface of the mounting member is fixedly connected with a fixing block. The left end of the fixing block is fixedly connected with a damper. The left end of the damper is fixedly connected with a buffer block. The right end of the buffer block is fixedly connected with a spring. The front part and the rear part of the outer surface of the buffer block are both fixedly connected with clamping blocks. The outer sides of the two clamping blocks are both provided with grooves that penetrate through left and right.
[0007] Preferably, a spherical mounting groove is opened at the left end of the femoral stem, and a cylindrical mounting groove is opened at the lower part of the inner wall surface of the spherical mounting groove.
[0008] Preferably, a cylindrical femoral head is fixedly connected to the lower part of the outer surface of the spherical femoral head, and a clamping groove is opened at the left part of the outer surface of the spherical femoral head.
[0009] Preferably, the spherical femoral head and the spherical mounting groove are both configured to be spherical, the spherical femoral head is clamped in the spherical mounting groove, and the cylindrical femoral head is clamped in the cylindrical mounting groove.
[0010] Preferably, the clamping column is clamped in the clamping slot.
[0011] Preferably, the right end of the spring is fixedly connected to the left end of the fixing block, and the damper is located inside the spring with a gap between the damper and the inner wall surface of the spring.
[0012] Preferably, the outer surface of the buffer block contacts the inner wall surface of the mounting piece, the two clamping blocks are movably sleeved in the corresponding two sliding grooves, and the two protruding blocks are movably sleeved in the corresponding two grooves.
[0013] Preferably, the left end of the buffer block is fixedly connected to an artificial femoral head, and the left end of the artificial femoral head is fixedly connected to an artificial acetabulum.
[0014] Compared with the prior art, the utility model has the following beneficial effects:
[0015] 1. By setting a spherical mounting groove, a cylindrical mounting groove and a clamping groove, the cylindrical femoral head is clamped in the cylindrical mounting groove, the spherical femoral head is clamped in the spherical mounting groove, and then the clamping column is clamped in the clamping groove, so as to realize the connection of the utility model, which is simple and convenient.
[0016] 2. By setting the damper, spring and card block, the purpose of improving the buffering effect at the artificial joint can be effectively achieved. When the damper and spring buffer, the buffer block will slide in the mounting part, and the two card blocks will slide in the corresponding two slide grooves respectively, and the card blocks will slide on the corresponding two protruding blocks, thereby improving the buffering stability, which is practical and effective. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 This is a schematic diagram of the overall structure of an artificial joint with a buffer structure according to the utility model;
[0018] Figure 2 It is a schematic diagram of the cross-section structure of a femoral stem of an artificial joint with a buffer structure according to the utility model;
[0019] Figure 3 This is a schematic diagram of the combined connection structure of a spherical femoral head and a cylindrical femoral head of an artificial joint with a buffer structure according to the utility model;
[0020] Figure 4 The utility model is a schematic diagram of the combined connection structure of a clamping column, a mounting piece, a fixing block, a damper, a spring, a buffer and a clamping block of an artificial joint with a buffer structure (the mounting piece is cut away).
[0021] In the figure: 1, femoral stem; 2, spherical mounting groove; 3, cylindrical mounting groove; 4, spherical femoral head; 5, cylindrical femoral head; 6, card slot; 7, clamping post; 8, mounting member; 9, chute; 10, protruding block; 11, fixing block; 12, damper; 13, spring; 14, buffer block; 15, clamping block; 16, groove; 17, artificial femoral head; 18, artificial acetabular cup. Detailed implementation mode
[0022] In order to make the technical means, creative features, achieved purposes and functions of the present utility model easy to understand, the present utility model will be further described below in conjunction with specific implementation modes.
[0023] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "inner", "outer", "front end", "rear end", "both ends", "one end", "the other end", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.
[0024] In the description of the present utility model, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "provided with", "connection", etc. should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.
[0025] Please refer to Figures 1-4 , the present utility model provides a technical solution:
[0026] An artificial joint with a buffer structure, including a femoral stem 1, a spherical femoral head 4 and a clamping post 7. The left end of the clamping post 7 is fixedly connected with a mounting member 8. The front part and the rear part of the inner wall surface of the mounting member 8 are both provided with chutes 9. The middle parts of the inner wall surfaces of the two chutes 9 are both fixedly connected with protruding blocks 10. The right inner wall surface of the mounting member 8 is fixedly connected with a fixing block 11. The left end of the fixing block 11 is fixedly connected with a damper 12. The left end of the damper 12 is fixedly connected with a buffer block 14. The right end of the buffer block 14 is fixedly connected with a spring 13. The front part and the rear part of the outer surface of the buffer block 14 are both fixedly connected with clamping blocks 15. The outer sides of the two clamping blocks 15 are both provided with grooves 16 that penetrate through left and right.
[0027] In this embodiment, a spherical mounting groove 2 is formed at the left end of the femoral stem 1, and a cylindrical mounting groove 3 is formed in the lower part of the inner wall surface of the spherical mounting groove 2; a cylindrical femoral head 5 is fixedly connected to the lower part of the outer surface of the spherical femoral head 4, and a clamping groove 6 is formed in the left part of the outer surface of the spherical femoral head 4; both the spherical femoral head 4 and the spherical mounting groove 2 are spherical, the spherical femoral head 4 is clamped in the spherical mounting groove 2, and the cylindrical femoral head 5 is clamped in the cylindrical mounting groove 3; a clamping post 7 is clamped in the clamping groove 6; the right end of the spring 13 is fixedly connected to the left end of the fixed block 11, and the damper 12 is located in the spring 13 and has a gap with the inner wall surface of the spring 13; the outer surface of the buffer block 14 is in contact with the inner wall surface of the mounting member 8, two clamping blocks 15 are respectively movably sleeved in the corresponding two sliding grooves 9, and two protruding blocks 10 are respectively movably sleeved in the corresponding two grooves 16; the left end of the buffer block 14 is fixedly connected to an artificial femoral head 17, and the left end of the artificial femoral head 17 is fixedly connected to an artificial acetabular cup 18.
[0028] It should be noted that the present utility model is an artificial joint with a buffer structure. During use, the cylindrical femoral head 5 is clamped in the cylindrical mounting groove 3, and at the same time, the spherical femoral head 4 is clamped in the spherical mounting groove 2, and then the clamping post 7 is clamped in the clamping groove 6 to realize the connection of the present utility model. By setting the damper 12 and the spring 13, the purpose of effectively improving the buffer effect at the artificial joint can be achieved. When the damper 12 and the spring 13 buffer, the buffer block 14 will slide in the mounting member 8. At the same time, the two clamping blocks 15 slide in the corresponding two sliding grooves 9 respectively, and at the same time, the clamping blocks 15 slide on the corresponding two protruding blocks 10 to improve the buffer stability, which is practical and effective.
[0029] The above shows and describes the basic principles, main features and advantages of the present utility model. Those skilled in the art should understand that the present utility model is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principle of the present utility model. Without departing from the spirit and scope of the present utility model, the present utility model will have various changes and improvements, and these changes and improvements all fall within the scope of the present utility model claimed. The scope of protection claimed by the present utility model is defined by the appended claims and their equivalents.
Claims
1. An artificial joint with a buffer structure, comprising a femoral stem (1), a spherical femoral head (4) and a clamping column (7), characterized in that: The left end of the clamping column (7) is fixedly connected to a mounting member (8), the front and rear parts of the inner wall of the mounting member (8) are provided with sliding grooves (9), the middle parts of the inner wall of the two sliding grooves (9) are fixedly connected to protruding blocks (10), the right inner wall of the mounting member (8) is fixedly connected to a fixing block (11), the left end of the fixing block (11) is fixedly connected to a damper (12), the left end of the damper (12) is fixedly connected to a buffer block (14), the right end of the buffer block (14) is fixedly connected to a spring (13), the front and rear parts of the outer surface of the buffer block (14) are fixedly connected to a clamping block (15), and the outer side surfaces of the two clamping blocks (15) are provided with left and right through grooves (16).
2. An artificial joint with a buffer structure according to claim 1, characterized in that: A spherical mounting groove (2) is formed at the left end of the femoral stem (1), and a cylindrical mounting groove (3) is formed at the lower portion of the inner wall surface of the spherical mounting groove (2).
3. The artificial joint with a buffer structure according to claim 1, characterized in that: The lower portion of the outer surface of the spherical femoral head (4) is fixedly connected to a cylindrical femoral head (5), and a slot (6) is provided on the left portion of the outer surface of the spherical femoral head (4).
4. The artificial joint with a buffer structure according to claim 3, characterized in that: The spherical femoral head (4) and the spherical mounting groove (2) are both configured to be spherical; the spherical femoral head (4) is snap-fitted into the spherical mounting groove (2); and the cylindrical femoral head (5) is snap-fitted into the cylindrical mounting groove (3).
5. The artificial joint with a buffer structure according to claim 3, characterized in that: The clamping column (7) is clamped in the clamping slot (6).
6. The artificial joint with a buffer structure according to claim 1, characterized in that: The right end of the spring (13) is fixedly connected to the left end of the fixed block (11); the damper (12) is located inside the spring (13) and there is a gap between the damper and the inner wall surface of the spring (13).
7. The artificial joint with a buffer structure according to claim 1, characterized in that: The outer surface of the buffer block (14) contacts the inner wall surface of the mounting member (8), the two clamping blocks (15) are respectively movably sleeved in the corresponding two slide grooves (9), and the two protruding blocks (10) are respectively movably sleeved in the corresponding two grooves (16).
8. The artificial joint with a buffer structure according to claim 1, characterized in that: The left end of the buffer block (14) is fixedly connected to an artificial femoral head (17), and the left end of the artificial femoral head (17) is fixedly connected to an artificial acetabulum (18).