Knee joint prosthesis tibia support detecting and fixing device
By designing a detection fixing device including a base plate, a limiting block and a profiling block, the damage and parallelism of the tibial tray forging during measurement is solved, and a high-precision detection effect is achieved.
Patent Information
- Application Number
- CN202422387990.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-29
- Publication Date
- 2025-07-18
- Estimated Expiration
- 2034-09-29
AI Technical Summary
In the prior art, the tibial tray forging is susceptible to damage during measurement and positioning and cannot keep the wing plate parallel to the bottom surface of the instrument, resulting in low detection accuracy.
A detection and fixing device including a base plate, a limiting block and a prototypical support block is adopted. The limiting block is equipped with a positioning surface and a limiting groove. The positioning surface is V-shaped. It is directly embedded with a tibial rod and keeps the wing plates parallel through the left and right support surfaces. The error-proof block and limiting groove are cooperated to ensure accurate positioning.
While not damaging the tibial tray forging, the wing plate is kept parallel to the bottom plate, improving the accuracy and accuracy of measurement.
Smart Images
Figure CN223122217U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of tibial tray detection devices, in particular to a detection and fixing device for artificial knee joint prosthesis tibial trays. Background Art
[0002] The orthopedic industry is one of the largest sub - industries in the medical device industry. Orthopedic implants are the most important category among them. Orthopedic implant forgings are mainly used as the main structure in orthopedic joint implants. Titanium alloy tibial trays are used to replace the diseased or damaged parts of the human knee joint, with high precision requirements. The roughness of the wing plate needs to be detected by a roughness meter. The tibial tray forging is a special - shaped part. The conventional measurement and positioning method is to use a flat - mouth pliers to clamp the forging, with the wing plate lying flat on the upper surface of the flat - mouth pliers, and use the clamping force of the flat - mouth pliers to fix the tibial tray forging. Due to the uncontrollable clamping force, surface defects of the tibial plateau are often caused, and when clamping, it cannot be guaranteed that the wing plate is always parallel to the bottom plane of the roughness meter, which will affect the detection accuracy of the roughness. Summary of the Utility Model
[0003] Aiming at the disadvantages that the existing measurement and positioning of tibial tray forgings are prone to cause forging damage and the wing plate cannot be kept parallel to the bottom surface of the instrument during measurement, resulting in low detection accuracy, the utility model provides a detection and fixing device for artificial knee joint prosthesis tibial trays, which can position the tibial tray forging without damaging it, and can keep the wing plate parallel to the ground, with relatively high detection accuracy.
[0004] The utility model provides the following technical solutions:
[0005] It includes a bottom plate, on the surface of which a limit block is installed. Inside the limit block, there is a profiling support block. The profiling support block includes a positioning block, a limit wall and a limit groove. It is characterized in that: the limit groove limits and fixes the bottom of the tibial tray forging. The top of the positioning block is provided with a positioning surface, which is V - shaped. The positioning surface can directly fit and install the tibial rod of the tibial tray forging and support and position the tibial rod. The positioning surface includes a left support surface and a right support surface. Both the left support surface and the right support surface contact and support the wing plate of the tibial tray forging. The right support surface supports one - side wing plate of the tibial tray forging to keep it stable, and the left support surface supports the other - side wing plate of the tibial tray to always be parallel to the bottom plate.
[0006] It further has the following characteristics:
[0007] A misalignment prevention block is arranged at the bottom of the limit block, and a draft angle is arranged at the edge of the misalignment prevention block.
[0008] At the bottom of the limit wall, a limit groove adapted to the misalignment prevention block is arranged in the profiling support block.
[0009] In the above - mentioned technical solution, the technical effects and advantages provided by the utility model are:
[0010] The limiting groove of the profiling support block directly fixes and limits the bottom of the tibial tray forging, and a positioning surface is provided on the positioning block of the profiling support block to directly support and position the tibial rod. The right support surface of the positioning surface keeps one wing plate of the tibial tray balanced, and the left support surface of the positioning surface keeps the other wing plate of the tibial tray always parallel to the bottom plate. This positioning will neither damage the tibial tray nor improve the measurement accuracy by keeping the wing plates parallel to the bottom plate;
[0011] The anti-misalignment groove of the profiling support block is adapted to the anti-misalignment block of the limiting block, ensuring the installation position of the profiling support block and indirectly guaranteeing the measurement accuracy. Brief Description of the Drawings
[0012] Figure 1 Schematic diagram of the overall structure working of the present utility model;
[0013] Figure 2 Side view of the overall structure working of the present utility model;
[0014] Figure 3 Exploded view of the overall structure of the present utility model;
[0015] Figure 4 Top view of the limiting block structure of the present utility model;
[0016] Figure 5 Schematic diagram of the tibial tray forging structure of the present utility model.
[0017] Description of the reference numerals:
[0018] 1. Bottom plate; 2. Limiting block; 21. Anti-misalignment block; 3. Profiling support block; 31. Positioning block; 311. Positioning surface; 3111. Left support surface; 3112. Right support surface; 32. Limiting wall; 33. Limiting groove; 34. Anti-misalignment groove; 4. Tibial tray forging. Detailed Description of the Preferred Embodiment
[0019] The present utility model provides an artificial knee joint prosthesis tibial tray detection and fixing device as shown in Figure 1 which includes a bottom plate 1. A limiting block 2 is installed on the surface of the bottom plate 1. The limiting block 2 is U-shaped, and a profiling support block 3 is arranged inside the limiting block 2. The profiling support block 3 includes a positioning block 31, a limiting wall 32 and a limiting groove 33. The limiting groove 33 limits and fixes the bottom of the tibial tray. A positioning surface 311 is provided at the top of the positioning block 31. The positioning surface 311 is V-shaped and includes a left support surface 3111 and a right support surface 3112. Both the left support surface 3111 and the right support surface 3112 contact and support the wing plates of the tibial tray forging. The right support surface 3112 supports one wing plate of the tibial tray forging 4 to keep it stable, and the left support surface 3111 supports the other wing plate of the tibial tray forging 4 to always be parallel to the bottom plate 1. The positioning surface 311 can directly install the tibial rod of the tibial tray forging 4 and support and position the tibial rod;
[0020] See Figure 4 , an anti-misalignment block 21 is provided at the bottom of the limit block 2, and a draft angle is provided at the edge of the anti-misalignment block 21. See Figure 3 , at the bottom of the limit wall 32, a limit groove 33 adapted to the anti-misalignment block 21 is provided in the profiling support block 3.
[0021] Working principle of the present utility model:
[0022] Refer to the attached instruction manual Figures 1 - 5 When using the present utility model, first place the tibial tray forging 4 to be detected on the profiling support block 3. The tibial rod part is fitted into the positioning surface 311, the wing plates of the tibial tray are respectively in contact with the left support surface 3111 and the right support surface 3112, and the tibial tray bottom plate is placed in the limit groove 33, thus completing the positioning. The wing plate on one side of the tibial tray forging 4 is parallel to the bottom plate 1, and the roughness meter detects the roughness of the wing plate of the tibial tray forging 4. After the detection, take out the tibial tray forging 4.
Claims
1. Artificial knee joint prosthesis tibial tray detection and fixing device, which comprises a bottom plate, a limiting block is installed on the surface of the bottom plate, and a profiling support block is arranged in the limiting block. The profiling support block includes a positioning block, a limiting wall and a limiting groove, and is characterized in that: The limiting groove limits and fixes the bottom of the tibial tray forging. A positioning surface is provided at the top of the positioning block. The positioning surface is V-shaped. The positioning surface can directly fit and install the tibial rod of the tibial tray forging and support and position the tibial rod. The positioning surface includes a left support surface and a right support surface. Both the left support surface and the right support surface contact and support the wing plate of the tibial tray forging. The right support surface supports one wing plate of the tibial tray forging to keep it stable, and the left support surface supports the other wing plate of the tibial tray forging to always be parallel to the bottom plate.
2. The artificial knee joint prosthesis tibial tray detection and fixing device according to claim 1, characterized in that: A misalignment prevention block is provided at the bottom of the limiting block, and a draft angle is provided at the edge of the misalignment prevention block.
3. The tibial tray detection and fixation device for the artificial knee joint prosthesis according to claim 1 or 2, characterized in that: At the bottom of the limiting wall, a limiting groove adapted to the misalignment prevention block is provided in the profiling support block.