Split femoral canal broach

Abstract

The utility model relates to the field of marrow cavity file, especially a split type femoral marrow cavity file, the both sides of cutter body are provided with installation groove no.

Description

Technical Field

[0001] This utility model relates to the field of medullary cavity file technology, and in particular to a split femoral medullary cavity 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, most traditional femoral medullary reamers are one-piece structures with fixed reamer surfaces. In practical applications, the reamer surfaces cannot be changed according to the actual surgical situation, and the entire reamer body often needs to be replaced, which is time-consuming and laborious. At the same time, when the reamer surfaces are damaged and need to be replaced after long-term use, traditional femoral medullary reamers can only be scrapped entirely. Therefore, there is an urgent need for a split femoral medullary reamer. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a split-type femoral medullary cavity file.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: The split-type femoral medullary reamer includes a blade body. The blade body has a mounting groove 1 and a mounting groove 2 on its two sides. A reamer strip is engaged in the mounting groove 1. The inner side of the reamer strip has multiple connecting posts. Each connecting post passes through the blade body and extends into the mounting groove 2. A locking plate is installed on one side of the inner side of the mounting groove 2. The upper end of the locking plate has multiple arc-shaped slots. Each arc-shaped slot is engaged with each connecting post in turn. A fastening bolt is installed on one side of the bottom of the locking plate, and the other end of the fastening bolt extends out of the outer side of the locking plate and is screwed into the connecting screw hole opened in the inner wall of the mounting groove. The outer wall of the locking plate is a downward sloping surface that bulges outward.

[0006] Furthermore, a preferred configuration is that a mounting head is installed on one side of the blade body.

[0007] In addition, a preferred structure is that a mating piece is provided on one side of the file bar, and the mating piece engages with a mating groove opened on one side of the mounting groove.

[0008] In addition, a preferred structure is that the middle of the blade body has a plurality of insertion holes that are horizontally opened through it, and the insertion holes are used to connect to the connecting post.

[0009] In addition, a preferred structure is that a locking plate is rotatably mounted on one side of the inner wall of the second mounting groove via a pin, and the locking plate is engaged with the second mounting groove after rotation.

[0010] In addition, a preferred structure is that an annular groove is provided on one side of the connecting column. When the locking plate is rotated and engaged in the second mounting groove, the outer wall of the locking plate is pressed against the inner wall of the annular groove, and the connecting column is subjected to the compressive force to achieve horizontal displacement.

[0011] The beneficial effects of this utility model are as follows: In this utility model, the file is composed of a blade body, a file strip, and a locking plate, forming a split structure. The file strip can be quickly installed onto the blade body through the setting of connecting posts and mating plates. The locking plate is rotated to lock the file strip. The bottom of the locking plate is provided with a fastening bolt for connecting to the blade body, thereby playing a locking and safety role. It not only realizes a split structure, but also ensures the stability of the file strip installation and improves work efficiency. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the external structure of the split-type femoral medullary cavity file proposed in this utility model. Figure 1 ; Figure 2 This is a schematic diagram of the external structure of the split-type femoral medullary cavity file proposed in this utility model. Figure 2 ; Figure 3 This is a schematic diagram of the exploded structure of the blade body proposed in this utility model; Figure 4 This is a schematic diagram of the docking plate connection structure proposed in this utility model; Figure 5 This is a schematic diagram of the connection structure between the blade body and the locking plate proposed in this utility model; Figure 6 This is a schematic diagram of the side structure of the locking plate proposed in this utility model; Figure 7 This is a schematic diagram of the unfolded locking plate proposed in this utility model; Figure 8 This is a schematic diagram of the fastening bolt connection structure proposed in this utility model.

[0013] In the diagram: 1. Blade body; 11. Mounting slot one; 111. Butt joint slot; 12. Mounting slot two; 121. Insertion hole; 2. Mounting head; 3. File strip; 31. Connecting post; 311. Annular groove; 32. Butt joint piece; 4. Locking plate; 41. Arc-shaped groove; 5. Fastening bolt; 6. Connecting screw hole. Detailed Implementation

[0014] 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.

[0015] Reference Figure 1-8A split-type femoral medullary cavity file includes a blade body 1. The blade body 1 has a first mounting groove 11 and a second mounting groove 12 on both sides. A file strip 3 is engaged in the first mounting groove 11. The inner side of the file strip 3 is provided with multiple connecting posts 31. Each connecting post 31 passes through the blade body 1 and extends into the second mounting groove 12. A locking plate 4 is installed on one side of the inner side of the second mounting groove 12. The upper end of the locking plate 4 is provided with multiple arc-shaped slots 41. Each arc-shaped slot 41 is engaged with each connecting post 31 in turn. Furthermore, a fastening bolt 5 is installed on one side of the bottom of the locking plate 4. The other end of the fastening bolt 5 extends out of the outer side of the locking plate 4 and is screwed into the connecting screw hole 6 opened in the inner wall of the mounting groove 12. By tightening the fastening bolt 5 into the connecting screw hole 6, the connection and locking function between the locking plate 4 and the blade body 1 is realized.

[0016] Furthermore, the outer wall of the locking plate 4 is a downward sloping and outward convex surface. When the locking plate 4 and the connecting post 31 are connected, the sloping surface design causes the connecting post 31 to be squeezed and generate horizontal displacement, thereby generating a "tightening" force on the file strip 3, improving the tightness of the connection between the file strip 3 and the blade body 1.

[0017] An installation head 2 is mounted on one side of the blade body 1.

[0018] A mating piece 32 is provided on one side of the file bar 3, and the mating piece 32 is engaged with the mating groove 111 opened on one side of the mounting groove 11.

[0019] The blade body 1 has multiple horizontally penetrating holes 121 in the middle, which are used to connect to the connecting post 31.

[0020] A locking plate 4 is rotatably mounted on one side of the inner wall of the mounting groove 2 12 via a pin. After rotation, the locking plate 4 is aligned and fits into the mounting groove 2 12.

[0021] An annular groove 311 is provided on one side of the connecting column 31. When the locking plate 4 is rotated and engaged in the mounting groove 12, the outer wall of the locking plate 4 is pressed against the inner wall of the annular groove 311, and the connecting column 31 is subjected to the pressing force to achieve horizontal displacement.

[0022] In this embodiment, during the replacement of the file strip 3, the fastening bolt 5 at the bottom of the locking plate 4 is loosened to disengage it from the connecting screw hole 6 at the bottom of the blade body 1. At this time, the locking plate 4 and the blade body 1 are unlocked. Then, by deflecting the locking plate 4 downward, the locking plate 4 is disengaged from the connecting post 31, and the file strip 3 can be directly removed.

[0023] During the installation of the file strip 3, the connecting post 31 on one side of the file strip 3 is inserted into the insertion hole 121 in the middle of the blade body 1, so that the mating piece 32 on one side of the file strip 3 is aligned and engaged with the mating groove 111 on one side of the mounting groove 11. Then, the operator rotates the locking plate 4 into the mounting groove 12 by holding or pushing. During this process, the arc-shaped groove 41 on the upper part of the locking plate 4 aligns with the annular groove 311 on the connecting post 31. The inclined outer edge of the locking plate 4... The wall will gradually squeeze the inner wall of the annular groove 311, and under the action of the squeezing force, the connecting column 31 will be displaced horizontally, forming a tension force on the file strip 3 towards the blade body 1, making the connection between the blade body 1 and the file strip 3 tighter and more stable. When the locking plate 4 is fully rotated and locked into the mounting groove 12, the fastening bolt 5 and the connecting screw hole 6 are coaxially aligned. At this time, by rotating and locking the fastening bolt 5, the fastening bolt 5 is screwed into the connecting screw hole 6, completing the locking state between the blade body 1 and the locking plate 4.

[0024] The connecting post 31 is located on the rotation path of the arc-shaped slot 41. After the locking plate 41 is rotated, the arc-shaped slot 41 is connected to the connecting post 31.

[0025] Among them, fastening bolt 5 is specifically an internal hex bolt.

[0026] The outer wall of the locking plate 4 is a downward sloping and outward convex slope. When the connecting post 31 mates with the arc-shaped slot 41, the connecting post 31 rotates with the locking plate 4, and its inner wall gradually contacts different positions of the slope and is gradually squeezed to produce horizontal displacement, which generates a "tightening" force on the file bar 3. This is easy to understand intuitively and will not be explained in detail.

[0027] The quick-detachable file strip 3 not only improves the flexibility of replacing the file strip 3 during surgery, but also allows for the replacement of only the damaged file strip 3 when maintenance is required, without scrapping the entire blade.

[0028] 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 split-type femoral medullary cavity reamer, comprising a blade (1), characterized in that, The blade body (1) has a first mounting groove (11) and a second mounting groove (12) on both sides respectively. A file strip (3) is inserted into the first mounting groove (11). Multiple connecting posts (31) are provided on the inner side of the file strip (3). Each connecting post (31) passes through the blade body (1) and extends into the second mounting groove (12). A locking plate (4) is installed on one side of the inner side of the second mounting groove (12). Multiple arc-shaped slots (41) are provided at the upper end of the locking plate (4). Each arc-shaped slot (41) is sequentially inserted into each connecting post (31). A fastening bolt (5) is installed on one side of the bottom of the locking plate (4). The other end of the fastening bolt (5) extends out of the outside of the locking plate (4) and is screwed into the connecting screw hole (6) opened in the inner wall of the mounting groove (12). The outer wall of the locking plate (4) is a downward sloping surface that protrudes outward.

2. The split-type femoral medullary cavity reamer according to claim 1, characterized in that, An installation head (2) is installed on one side of the blade body (1).

3. The split-type femoral medullary cavity reamer according to claim 1, characterized in that, The file bar (3) has a mating piece (32) on one side, which engages with the mating groove (111) on one side of the mounting groove (11).

4. The split-type femoral medullary cavity reamer according to claim 1, characterized in that, The blade body (1) has a plurality of horizontally penetrating holes (121) in the middle, which are used to connect to the connecting post (31).

5. The split-type femoral medullary cavity reamer according to claim 1, characterized in that, A locking plate (4) is rotatably mounted on one side of the inner wall of the second mounting groove (12) via a pin. After rotation, the locking plate (4) is engaged and fits into the second mounting groove (12).

6. The split-type femoral medullary cavity reamer according to claim 1, characterized in that, An annular groove (311) is provided on one side of the connecting column (31). When the locking plate (4) is rotated and engaged in the second mounting groove (12), the outer wall of the locking plate (4) is pressed against the inner wall of the annular groove (311), and the connecting column (31) is subjected to the squeezing force to achieve horizontal displacement.

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