Fixture tool for distal femur cutting guider

Abstract

The utility model relates to a clamp tool for a distal femur cutting guider. The clamp tool comprises an integrally-formed body. A concave U-shaped placing groove is formed in the top of the body; a concave placing platform is arranged at the top of the body; one side of the placing platform is communicated with the U-shaped placing groove, and the depth of the placing platform is far smaller than that of the U-shaped placing groove; the placing platform is provided with a concave long-strip-shaped positioning placing groove; the depth of the long-strip-shaped positioning containing groove is far smaller than that of the U-shaped containing groove. The tool has the advantages of being accurate in positioning, firm in fixing, high in adaptability, capable of protecting workpieces, convenient to operate and maintain and the like, and the problems of an existing tool in the machining or assembling process of the cutting guider can be effectively solved.

Description

Technical Field

[0001] This utility model relates to the field of medical device processing tooling technology, and in particular to a femoral distal cutting guide fixture tooling. Background Technology

[0002] In the production of distal femoral cutting guides, precise fixtures are required to secure the cutting guide during both the machining and assembly stages. Traditional fixtures may suffer from inaccurate positioning, insecure fixation, inability to effectively grip the workpiece, and easy damage to the workpiece. This can lead to errors during machining (such as cutting and drilling) or assembly operations, affecting the quality and performance of the cutting guide and consequently negatively impacting the outcome of the medical surgery.

[0003] Therefore, developing a new, high-precision, and fully functional fixture is crucial for improving product quality. Summary of the Invention

[0004] The purpose of this utility model is to provide a femoral distal cutting guide fixture that can achieve stable positioning and effective fixation of the femoral distal cutting guide, ensure the accuracy and efficiency of processing or assembly operations, and meet the strict requirements for precision and quality in medical device manufacturing, thereby solving the above-mentioned technical problems.

[0005] To achieve the above technical solution, the technical solution of this utility model is as follows: This distal femoral cutting guide fixture mainly includes an integrally formed body. The top of the body is provided with a concave U-shaped placement groove and a placement platform. One side of the placement platform communicates with the U-shaped placement groove, and the depth of the placement platform is much smaller than the depth of the U-shaped placement groove. The placement platform is provided with a concave, elongated positioning groove, the depth of which is also much smaller than the depth of the U-shaped placement groove. These structures together constitute the space for placing and positioning the distal femoral cutting guide. Through the design of different depths and a special shape, precise placement and preliminary positioning of the cutting guide are achieved.

[0006] Furthermore, the top of the main body is provided with a concave square positioning shoulder, one side of which connects to the concave placement platform. Each side of the square positioning shoulder has a third positioning groove and a fourth positioning groove, and the depth of the third and fourth positioning grooves is much greater than the depth of the elongated positioning placement groove. The design of the square positioning shoulder, the third positioning groove, and the fourth positioning groove provides more precise positioning references for the distal femoral cutting guide from multiple directions, further restricting the cutting guide's degrees of freedom on the tooling, ensuring its positional accuracy during processing or assembly, and reducing processing errors caused by positioning deviations.

[0007] Furthermore, the varying depths of the U-shaped placement groove, placement platform, elongated positioning placement groove, third positioning groove, and fourth positioning groove are meticulously designed based on the shape and structural characteristics of the distal femoral cutting guide. The U-shaped placement groove accommodates the main part of the cutting guide, and its depth ensures a stable vertical placement. The shallower depth of the placement platform allows for rapid initial positioning of the cutting guide by utilizing its height difference with the U-shaped placement groove. The elongated positioning placement groove provides more precise control over the cutting guide's position in the plane, while the deeper third and fourth positioning grooves are used to engage with specific parts of the cutting guide for more accurate positioning. These grooves of different depths work together to form a multi-layered positioning system.

[0008] Furthermore, the placement platform is arrayed with suction holes along its length, and each suction hole is equipped with a sealing ring, with one side of the sealing ring extending 1-2 mm beyond the surface of the placement platform. When the distal femoral cutting guide is placed on the placement platform, the sealing ring contacts the surface of the cutting guide. Under the suction force generated by the suction holes, the sealing ring ensures a good sealing environment between the suction holes and the cutting guide, enhancing the suction effect and thus more firmly fixing the cutting guide, preventing it from shifting during processing or assembly.

[0009] Furthermore, the main body has a through-hole along its length, with the suction port connected to it, and the sum of the cross-sectional areas of all suction ports is much larger than that of the ventilation port. This design allows sufficient negative pressure to be generated at the suction port when air is drawn through the ventilation port, using the pressure difference to adhere the distal femoral cutting guide to the placement platform. Simultaneously, the difference in cross-sectional areas between the suction port and the ventilation port helps optimize the distribution and magnitude of suction force, ensuring the stability and uniformity of the adsorption.

[0010] Furthermore, the U-shaped placement groove is equipped with a concave columnar groove and suction holes, with the suction holes extending to the vent. This design also creates suction force within the U-shaped placement groove, further enhancing the fixation effect on the distal femoral cutting guide. Especially for the portion placed within the U-shaped placement groove, it can effectively prevent shaking during processing. Working together with the suction structure on the placement platform, it ensures the stable fixation of the cutting guide within the entire fixture.

[0011] Compared with the prior art, the present invention has the following beneficial effects:

[0012] 1) Through a multi-layered and multi-dimensional positioning structure design, including a U-shaped placement groove, a placement platform, a long strip-shaped positioning groove, a square positioning shoulder, a third positioning groove, and a fourth positioning groove, high-precision positioning of the distal femoral cutting guide can be achieved. The grooves of different depths and the specially shaped positioning shoulders and grooves work together to restrict the degrees of freedom of the cutting guide from all directions, effectively avoiding positioning deviations and providing an accurate starting position for processing or assembly operations, greatly improving processing accuracy and ensuring product quality.

[0013] 2) The suction system, consisting of the suction holes on the placement platform, the sealing ring, and the suction holes in the U-shaped placement groove, firmly adheres the distal femoral cutting guide to the fixture under the negative pressure generated by the air extraction through the vent. The sealing ring ensures a good seal between the suction holes and the cutting guide, enhancing the suction effect and preventing the cutting guide from shifting or shaking due to external forces during processing or assembly, thus ensuring operational stability and accuracy.

[0014] 3) The structural design of this tooling allows it to adapt to distal femoral cutting guides of different specifications. The grooves and positioning structures of different depths can accommodate cutting guides of different sizes within a certain range. The suction system with suction holes and ventilation holes can also achieve stable adsorption of cutting guides of various shapes, improving the versatility of the tooling, reducing production costs, and making it suitable for various types of distal femoral cutting guide processing or assembly scenarios.

[0015] 4) The design of the sealing ring extending 1-2mm out of the platform surface ensures a good sealing effect while avoiding direct hard contact between the tooling and the surface of the cutting guide. This reduces the risk of scratches or damage to the surface of the cutting guide, helps protect the surface quality of the workpiece, and improves the product qualification rate.

[0016] 5) The tooling has a simple and integrated structure, making it easy to operate. The cutting guide can be fixed simply by placing and adsorbing it, which is convenient for operators. At the same time, the tooling is relatively easy to maintain. It is easy to check the condition of components such as suction holes, sealing rings, vents, and positioning structures. If problems are found, the corresponding components can be repaired or replaced in a timely manner, reducing maintenance costs and repair time, ensuring production continuity, and improving production efficiency. It is suitable for widespread application in the medical device manufacturing industry.

[0017] In summary, this distal femoral cutting guide fixture has advantages such as accurate positioning, firm fixation, strong adaptability, workpiece protection, and convenient operation and maintenance. It can effectively solve the problems existing in the processing or assembly of cutting guides by existing fixtures and meet the needs of medical device manufacturing for high-quality fixtures. Attached Figure Description

[0018] To further illustrate the various embodiments, the present invention provides accompanying drawings. These drawings are part of the disclosure of the present invention and are mainly used to illustrate the embodiments, and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these drawings, those skilled in the art should be able to understand other possible implementations and the advantages of the present invention. Components in the drawings are not drawn to scale, and similar component symbols are generally used to represent similar components.

[0019] Figure 1 A 3D drawing of the fixture for the distal femoral cutting guide. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] To enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0022] Please see the appendix Figure 1 The image shows a distal femoral cutting guide fixture, comprising an integrally formed body 1; a concave U-shaped placement groove 2 on the top of the body 1; a concave placement platform 3 on the top of the body 1; one side of the placement platform 3 communicating with the U-shaped placement groove 2, and the depth of the placement platform 3 being much smaller than the depth of the U-shaped placement groove 2; a concave elongated positioning groove 4 on the placement platform 3, the depth of the elongated positioning groove 4 being much smaller than the depth of the U-shaped placement groove 2. This invention achieves precise positioning of the distal femoral cutting guide through various positioning structures of different depths and shapes. The U-shaped placement groove on the top of the body initially accommodates the main body of the cutting guide, and its depth design effectively limits the vertical position of the cutting guide. The placement platform communicating with the U-shaped placement groove and having a depth much smaller than the U-shaped placement groove, the height difference between the two assists the operator in quickly placing the cutting guide in a roughly correct position. The elongated positioning slots on the placement platform further position the cutting guide in the plane. This positioning layer, from shallow to deep and from coarse to fine, can accurately determine the position of the cutting guide on the tooling, providing a precise reference for subsequent processing, effectively reducing processing errors and improving processing accuracy.

[0023] Based on the above embodiment, the top of the body 1 is provided with a concave square positioning shoulder 5; one side of the square positioning shoulder 5 is connected to the concave placement platform 3; each side of the square positioning shoulder 5 is provided with a third positioning groove 6 and a fourth positioning groove 7; the depth of the third positioning groove 6 and the fourth positioning groove 7 is much greater than the depth of the elongated positioning placement groove 4. The concave square positioning shoulder, the third positioning groove, and the fourth positioning groove further enhance the positioning effect. The square positioning shoulder is connected to the placement platform, and the depth of the third positioning groove and the fourth positioning groove on both sides is much greater than that of the elongated positioning placement groove, which provides more detailed positioning restrictions on the cutting guide from multiple directions. It works in conjunction with other positioning structures to prevent the cutting guide from displacing in any direction during processing, ensuring the stability of the processing operation and guaranteeing the quality of the cutting guide.

[0024] Based on the above embodiment, the placement platform 3 is provided with suction holes 8 arranged in an array along its length; each suction hole 8 is provided with a sealing ring 9; one side of the sealing ring 9 extends 1-2 mm above the surface of the placement platform 3. A through-hole is provided along the length of the main body, communicating with the suction holes on the placement platform, and the sum of the cross-sectional areas of all suction holes is much larger than the cross-sectional area of ​​the vent hole. This design generates sufficient negative pressure at the suction holes when air is drawn from them. According to fluid mechanics principles, when air flows from the large-area suction holes to the small-area vent holes, the airflow speed increases and the pressure decreases, thus forming a strong suction force around the suction holes. During processing, this suction force firmly adheres the distal femoral cutting guide to the placement platform, preventing movement of the cutting guide due to external forces generated during cutting, drilling, and other processing operations, ensuring processing accuracy. Additionally, a sealing ring is provided at the suction hole on the placement platform, with one side extending 1-2 mm above the surface of the placement platform. When the cutting guide is adhered to the placement platform, the sealing ring contacts the surface of the cutting guide. This design ensures a tight seal between the suction hole and the cutting guide, allowing the suction force to be fully utilized, while also preventing direct hard contact between the tooling and the cutting guide. This prevents scratches or wear on the surface of the cutting guide during adsorption and processing, effectively protecting the surface quality of the workpiece and reducing the product defect rate caused by surface damage.

[0025] Based on the above embodiments, the main body 1 is provided with a through vent along its length; the suction hole 8 is connected to the vent.

[0026] Based on the above embodiments, the cross-sectional area of ​​all the suction holes 8 is much larger than the cross-sectional area of ​​the vent holes.

[0027] Based on the above embodiment, the U-shaped placement groove 2 is provided with a concave columnar groove 21; a suction hole is provided in front of the columnar groove 21; the suction hole extends to the vent. The columnar groove and suction hole within the U-shaped placement groove, with the suction hole extending to the vent, provide suction force for the cutting guide portion within the U-shaped placement groove. Combined with the suction effect on the placement platform, the cutting guide is fixed from multiple positions, further enhancing the stability of the entire cutting guide within the tooling and ensuring stability during complex processing operations.

[0028] When using the device, place it on a suitable workbench, ensuring the main body is stable. Check that the suction port is unobstructed and that the vent is properly connected to the external air extraction equipment, ensuring the entire adsorption system is leak-free. Check that the sealing ring is securely installed and intact, and that its protrusion from the surface of the placement platform is within 1-2mm. If any problems are found, adjust or replace the sealing ring promptly. Inspect the U-shaped placement groove, placement platform, elongated positioning placement groove, square positioning shoulder, third positioning groove, and fourth positioning groove for any debris or damage, ensuring that the surfaces of these structures are smooth and free of defects to accurately position the distal femoral cutting guide. Next, place the distal femoral cutting guide on the fixture, first aligning it with the U-shaped placement groove, so that the main part of the cutting guide falls into the U-shaped placement groove. Use the depth and shape of the U-shaped placement groove for initial vertical positioning. The cutting guide is slid on the placement platform, aligning with the elongated positioning groove, square positioning shoulder, third positioning groove, and fourth positioning groove. These structures precisely constrain the cutting guide, ensuring accurate positioning within the plane. The external air extraction device is activated, drawing air through the vent to create negative pressure at the suction port. The suction port on the placement platform, sealed by the sealing ring, firmly adheres the cutting guide to the platform. Simultaneously, the suction port within the U-shaped placement groove also generates suction force, working together to stably fix the cutting guide within the fixture, ready for subsequent processing or assembly operations. The fixture is integrally molded, with a simple and clear structure. Placing the cutting guide on the fixture is intuitive; simply place it in the U-shaped placement groove and make simple adjustments on the placement platform, then draw air through the vent to achieve adhesion and fixation. The operation is easy for operators to master, allowing for quick workpiece clamping and improved work efficiency. Furthermore, the layout and dimensional design of the U-shaped placement groove, placement platform, various positioning grooves, and suction ports can accommodate different specifications of distal femoral cutting guides within a certain range. Regardless of minor differences in size or shape, the tooling can effectively position and fix the cutting guide through the cooperation of these structures. There is no need to design tooling separately for each size of cutting guide, which reduces production costs, improves production efficiency, and meets diverse production needs.

[0029] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art should be able to make equivalent embodiments by making some changes or modifications to the above-disclosed technical content without departing from the scope of the present invention. Any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A fixture for a distal femoral cutting guide, characterized in that, The system includes an integrally formed body (1); the top of the body (1) is provided with a concave U-shaped placement groove (2); the top of the body (1) is provided with a concave placement platform (3); one side of the placement platform (3) is connected to the U-shaped placement groove (2), and the depth of the placement platform (3) is much smaller than the depth of the U-shaped placement groove (2); the placement platform (3) is provided with a concave elongated positioning placement groove (4); the depth of the elongated positioning placement groove (4) is much smaller than the depth of the U-shaped placement groove (2).

2. The femoral distal cutting guide fixture as described in claim 1, characterized in that: The top of the main body (1) is provided with a concave square positioning shoulder (5); one side of the square positioning shoulder (5) is connected to the concave placement platform (3); the square positioning shoulder (5) is provided with a third positioning groove (6) and a fourth positioning groove (7) on each side; the depth of the third positioning groove (6) and the fourth positioning groove (7) is much greater than the depth of the long strip positioning placement groove (4).

3. The distal femoral cutting guide fixture as described in claim 2, characterized in that: The placement platform (3) is provided with suction holes (8) arranged in an array along the length direction; a sealing ring (9) is provided on the suction hole (8); one side of the sealing ring (9) extends 1-2 mm above the surface of the placement platform (3).

4. The distal femoral cutting guide fixture as described in claim 1, characterized in that: The main body (1) has a through vent along its length; the suction hole (8) is connected to the vent.

5. The distal femoral cutting guide fixture as described in claim 4, characterized in that: The cross-sectional area of ​​all the suction holes (8) is much larger than that of the vent holes.

6. The distal femoral cutting guide fixture as described in claim 1, characterized in that: The U-shaped placement groove (2) is provided with a concave columnar groove (21); a suction hole is provided in front of the columnar groove (21); the suction hole extends to the vent hole.

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