High-precision wear-resistant medullary cavity file

Abstract

The utility model relates to the field of medullary cavity files, in particular to a high-precision wear-resistant medullary cavity file, which is characterized in that a positioning column is arranged at the bottom of the medullary cavity file, a connecting screw rod is mounted in the center of the inside of the positioning column, an extrusion block is screwed in the middle of the connecting screw rod, a pair of locking blocks is arranged above the extrusion block, and one end of each locking block extends out of the outer wall of the positioning column. And a plurality of wedge-shaped blocks are mounted on the outer wall of the locking block. According to the medullary cavity file, the locking block jacking mechanism is additionally arranged on the positioning column of the medullary cavity file, the inner extrusion block can be driven to extrude and jack out the two locking blocks on the outer side of the positioning column by rotating the adjusting rod, so that the inner wall of the mounting groove is propped and jacked to reduce a structural gap, shaking and deviation generated when the medullary cavity file is used are reduced, and the service life of the medullary cavity file is prolonged. And the stability and precision in the using process are effectively improved.

Description

Technical Field

[0001] This utility model relates to the field of medullary canal file technology, and in particular to a high-precision wear-resistant medullary canal file. Background Technology

[0002] The femoral medullary reamer is a key instrument in orthopedic surgery, mainly used to process the femoral medullary cavity and create suitable space for implants.

[0003] Currently, medullary files are mostly used in conjunction with a hammer and puller (connecting handle). Some traditional medullary files rely solely on a snap-fit ​​groove and positioning post connection structure to assemble with the operating handle. This design has mechanical defects. In actual use, there is a certain gap between the post and the groove. When the operator hammers or pulls the medullary file, the file body will shift, affecting accuracy. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a high-precision, wear-resistant medullary cavity file.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A high-precision wear-resistant medullary canal file includes a medullary canal file and a positioning post. The positioning post is provided at the bottom of the medullary canal file. A connecting screw is installed at the center of the positioning post. A pressing block is screwed into the middle of the connecting screw. A pair of locking blocks are provided above the pressing block. One end of the locking block extends out of the outer wall of the positioning post. Multiple wedge blocks are installed on the outer wall of the locking block.

[0007] The bottom end of the connecting screw is rotatably connected to the inner bottom wall of the positioning column, and the upper end is rotatably connected to the mounting bracket. The mounting bracket is fixedly installed inside the positioning column. A bevel gear set is configured in the middle of the mounting bracket. The output end of the bevel gear set is connected to the connecting screw, and the input end is connected to the adjusting rod. One end of the adjusting rod extends out of the positioning column.

[0008] In addition, a preferred structure is that a connecting groove is provided on one side of the positioning post.

[0009] In addition, a preferred structure is that the positioning post has a vertical groove inside, and a pressing block is installed in the vertical groove. The pressing block moves vertically through the vertical groove, and the upper end of the pressing block is rounded.

[0010] In addition, a preferred structure is that an adjusting rod is rotatably mounted on one side of the outer wall of the positioning post, one end of the adjusting rod passes through the positioning post and extends into the interior of the mounting frame, and a rubber bushing is installed inside the mounting frame, with the rubber bushing in extrusion and friction contact with the outer wall of the adjusting rod.

[0011] In addition, a preferred structure is that limit blocks are installed on the top and bottom walls of the locking block, the limit blocks are limited and installed in the limit groove opened on the outside of the positioning post, and adjacent locking blocks are connected by a connecting rod.

[0012] In addition, a preferred structure is that each locking block has a slot on one side, and a connecting rod is inserted into the slot, which can move within the slot.

[0013] In addition, a preferred structure is that the bottom of one side of the locking block is set as an inclined surface, and a pressing block is provided below the inclined surface.

[0014] The beneficial effects of this utility model are as follows:

[0015] In this invention, the positioning post of the medullary canal file is additionally provided with a locking block tightening mechanism. By rotating the adjusting rod, the internal squeezing block can be driven to squeeze and push out the two locking blocks on the outside of the positioning post, thereby pressing against the inner wall of the mounting groove to reduce structural gaps, reduce the shaking and displacement of the medullary canal file during use, and effectively improve the stability and accuracy of the use process. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of a high-precision wear-resistant medullary canal file proposed in this utility model;

[0017] Figure 2 This is a schematic diagram of the external structure of the positioning column proposed in this utility model;

[0018] Figure 3 This is a schematic diagram of the internal structure of the positioning column proposed in this utility model;

[0019] Figure 4 This is a schematic diagram of the locking block installation structure proposed in this utility model;

[0020] Figure 5 This is a schematic diagram of the locking block connection structure proposed in this utility model;

[0021] Figure 6 This is a schematic diagram of the internal structure of the mounting bracket proposed in this utility model.

[0022] In the diagram: 1. Medullary canal file; 2. Positioning post; 3. Connecting groove; 4. Locking block; 41. Wedge block; 42. Limiting block; 43. Inclined surface; 5. Adjusting rod; 6. Extrusion block; 7. Connecting screw; 8. Mounting bracket; 9. Limiting groove; 10. Bevel gear set; 11. Rubber bushing; 12. Connecting rod. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0024] Reference Figure 1-6 A high-precision wear-resistant medullary canal file includes a medullary canal file 1 and a positioning post 2. The positioning post 2 is provided at the bottom of the medullary canal file 1. A connecting screw 7 is installed at the center of the interior of the positioning post 2. A pressing block 6 is screwed into the middle of the connecting screw 7. A pair of locking blocks 4 are provided above the pressing block 6. One end of the locking block 4 extends out of the outer wall of the positioning post 2. Multiple wedge blocks 41 are installed on the outer wall of the locking block 4.

[0025] The bottom end of the connecting screw 7 is rotatably connected to the inner bottom wall of the positioning post 2, and the upper end is rotatably connected to the mounting bracket 8. The mounting bracket 8 is fixedly installed inside the positioning post 2. A bevel gear set 10 is arranged in the middle of the mounting bracket 8. The output end of the bevel gear set 10 is connected to the connecting screw 7, and the input end is connected to the adjusting rod 5. One end of the adjusting rod 5 extends out of the positioning post 2.

[0026] A connecting groove 3 is provided on one side of the positioning post 2. The connecting groove 3 is used to realize the basic snap-fit ​​requirement.

[0027] The positioning post 2 has a vertical groove inside, and a pressing block 6 is installed in the vertical groove. The pressing block 6 moves vertically through the vertical groove, and the upper end of the pressing block 6 is rounded.

[0028] An adjusting rod 5 is rotatably mounted on one side of the outer wall of the positioning column 2. One end of the adjusting rod 5 passes through the positioning column 2 and extends into the mounting frame 8. A rubber bushing 11 is installed inside the mounting frame 8. The rubber bushing 11 is in contact with the outer wall of the adjusting rod 5 by compression and friction. The compression of the rubber bushing 11 generates rotational damping force to ensure the stability of the adjusting rod 5 during the adjustment process.

[0029] Limiting blocks 42 are installed on the top and bottom walls of the locking block 4. The limiting blocks 42 are limited in the limiting groove 9 opened on the outside of the positioning post 2. Adjacent locking blocks 4 are connected by connecting rods 12. The locking blocks 4 can move freely horizontally to a certain extent through the limiting groove 9 to realize the operation of extending and retracting.

[0030] Each locking block 4 has a slot on one side, and a connecting rod 12 is inserted into the slot. The connecting rod 12 can move within the slot and connects adjacent locking blocks 4 into a whole. The locking block 4 can slide relative to the connecting rod 12.

[0031] The bottom of one side of the locking block 4 is set as a slope 43, and the pressing block 6 is provided below the slope 43.

[0032] In this embodiment, the medullary file 1 achieves basic connection function through the positioning post 2 and the connecting groove 3. After the connection is completed, the rotating adjustment rod 5 drives the bevel gear set 10 to rotate. The bevel gear set 10 transmits power to the connecting screw 7. The connecting screw 7 rotates and drives the extrusion block 6 to move through the spiral rotation. When the extrusion block 6 moves upward, the rounded corner of the top of the extrusion block 6 is pressed against the inclined surface 43 on the inner side of the locking block 4. Under the guidance of the inclined surface, the locking block 4 is displaced outward by the extrusion force and presses against the outer groove wall (the slot for installing the positioning post 2). Under the extrusion force of the wedge block 41, the friction and clamping force generated will make up for the original structural gap between the post and the groove and ensure the installation stability.

[0033] The medullary file 1 is connected to the slot of the connecting handle via the positioning post 2. After the locking block 4 extends out, it locks into contact with the inner wall of the slot of the connecting handle. While maintaining the original locking mechanism of the positioning post 2, an additional locking mechanism is set to improve the installation stability and ensure the accuracy of the medullary file.

[0034] The bevel gear set 10 includes two bevel gears that mesh perpendicularly with each other. The two bevel gears are respectively mounted on the adjusting rod 5 and the connecting screw 7, and are assembled together inside the mounting bracket 8. When the adjusting rod 5 rotates, it drives the bevel gear to rotate, thereby driving the other bevel gear to rotate, thus achieving the purpose of driving the connecting screw 7.

[0035] The end of the adjusting rod 5 that extends out of the positioning pin 2 can be an internal hex head, which can be turned by a hex wrench. This is easy to understand and will not be explained further.

[0036] Among them, the file surface of the medullary file 1 is coated with titanium nitride to achieve wear resistance.

[0037] It is worth noting that the method and process by which the medullary canal file 1 connects to the connecting handle via the positioning post 2 are existing technologies. This mechanism retains the connecting groove 3 of the positioning post 2 to meet its basic installation requirements. The specific structure and connection method of the connecting handle that are not explained in detail above are common knowledge to those skilled in the art and will not be explained further.

[0038] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A high-precision, wear-resistant medullary canal file, comprising a medullary canal file (1) and a positioning post (2), characterized in that, The bottom of the medullary canal file (1) is provided with a positioning post (2), and a connecting screw (7) is installed at the center of the positioning post (2). A compression block (6) is screwed into the middle of the connecting screw (7). A pair of locking blocks (4) are provided above the compression block (6). One end of the locking block (4) extends out of the outer wall of the positioning post (2), and multiple wedge blocks (41) are installed on the outer wall of the locking block (4). The bottom end of the connecting screw (7) is rotatably connected to the bottom wall inside the positioning column (2), and the upper end is rotatably connected to the mounting bracket (8). The mounting bracket (8) is fixedly installed inside the positioning column (2). A bevel gear set (10) is arranged in the middle of the mounting bracket (8). The output end of the bevel gear set (10) is connected to the connecting screw (7), and the input end is connected to the adjusting rod (5). One end of the adjusting rod (5) extends out of the positioning column (2).

2. The high-precision wear-resistant medullary canal file according to claim 1, characterized in that, A connecting groove (3) is provided on one side of the positioning post (2).

3. The high-precision wear-resistant medullary canal file according to claim 1, characterized in that, The positioning column (2) has a vertical groove inside, and a pressing block (6) is installed in the vertical groove. The pressing block (6) moves vertically through the vertical groove, and the upper end of the pressing block (6) is rounded.

4. The high-precision wear-resistant medullary canal file according to claim 1, characterized in that, An adjusting rod (5) is rotatably installed on one side of the outer wall of the positioning column (2). One end of the adjusting rod (5) passes through the positioning column (2) and extends into the mounting frame (8). A rubber bushing (11) is installed inside the mounting frame (8). The rubber bushing (11) is in contact with the outer wall of the adjusting rod (5) by compression and friction.

5. The high-precision wear-resistant medullary canal file according to claim 1, characterized in that, Limiting blocks (42) are installed on the top and bottom walls of the locking block (4). The limiting blocks (42) are installed in the limiting groove (9) opened on the outside of the positioning column (2), and adjacent locking blocks (4) are connected by connecting rods (12).

6. A high-precision, wear-resistant medullary canal file according to claim 5, characterized in that, Each locking block (4) has a slot on one side, and a connecting rod (12) is inserted into the slot. The connecting rod (12) can move within the slot.

7. A high-precision, wear-resistant medullary canal file according to claim 5, characterized in that, The bottom of one side of the locking block (4) is set as a slope (43), and a pressing block (6) is provided below the slope (43).

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