Large-diameter long-arm pedicle screw assembling tool

Abstract

The utility model belongs to an auxiliary tool for product assembly in the field of medical instruments, and particularly relates to a large-diameter long-arm pedicle screw assembly tool which comprises a screwdriver rod and a knocking body, a penetrating cavity penetrating through the knocking body in the length direction is formed in the knocking body, the screwdriver rod is inserted into the knocking body along the penetrating cavity, and the screwdriver rod is inserted into the knocking body along the penetrating cavity. The driving part extends out of the matching part, and the quick connector extends out of the knocking part. The screwdriver rod is used for installing a universal screw, and the knocking body is used for installing an annular gasket. According to the assembling tool, through the integrated design, screwing-in of the universal screw and one-step imbedding of the annular gasket are carried out at the same time, the adjusting frequency of the annular gasket is reduced in the assembling process, the assembling steps are simplified, and the assembling accuracy and efficiency are remarkably improved.

Description

Technical Field

[0001] The utility model belongs to an auxiliary tool for product assembly in the field of medical devices, and particularly relates to an assembly tool for large-diameter long-arm pedicle screws. Background Art

[0002] When assembling large-diameter long-arm pedicle screws, a universal screw needs to be screwed into a screw seat, and after an annular washer abuts against the universal screw, it is fixedly connected to the long-arm screw seat. The current method for assembling large-diameter long-arm pedicle screws is as follows: First, screw the universal screw into the long-arm screw seat, and then manually rotate the universal screw into place or use a screwdriver to screw it into place; then, install the annular washer into the long-arm screw seat. After the annular washer is installed in place, it is riveted, and is riveted to the long-arm screw seat. Due to the long-arm structure of the screw seat, during the placement process, the annular washer swings circumferentially, and the annular washer cannot reach the expected position in one go, resulting in the inability to rivet the annular washer for the first time. It is necessary to adjust the annular washer into place before riveting, leading to difficulties and time-consuming efforts in the assembly of large-diameter long-arm pedicle screws.

[0003] Therefore, it is necessary to develop an assembly tool for large-diameter long-arm pedicle screws. Summary of the Invention

[0004] In order to solve the above technical problems, the utility model provides an assembly tool for large-diameter long-arm pedicle screws, which can place the annular washer in the expected position in one go, so as to improve the accuracy and assembly efficiency in the assembly process of large-diameter long-arm pedicle screws.

[0005] The technical solution provided by the utility model is as follows:

[0006] An assembly tool for large-diameter long-arm pedicle screws, comprising:

[0007] A screwdriver rod, the head of the screwdriver rod has a driving part with any desired shape to match the shape of the driving feature of the universal screw, and the tail of the screwdriver rod has a quick connector for cooperating with a quick-release handle;

[0008] A knocking main body, one end of the knocking main body is provided with a matching part for cooperating with the arc groove of the annular washer, the other end of the knocking main body is provided with a knocking part, a through cavity penetrating the knocking main body along the length direction is arranged inside the knocking main body, the screwdriver rod is inserted into the knocking main body along the through cavity, the driving part extends out of the matching part, and the quick connector extends out of the knocking part.

[0009] Preferably, the matching part is perpendicularly connected to the knocking main body to form a "T"-shaped fixed connection.

[0010] As a further preference, the opposite side of the fitting portion connected to the knocking body is provided with an arc convex surface that fits with the arc groove of the annular washer. A through hole is provided on the arc convex surface, and the through hole is a part of the through cavity.

[0011] As a preference, a holding portion is provided at a position of the screwdriver rod close to the quick connector, and the holding portion extends outside the knocking portion. The design of the holding portion facilitates the operator to hold the screwdriver rod, enhancing the stability of the operation; meanwhile, it can play a role in limiting the screwdriver rod by the knocking body.

[0012] As a preference, the cross-section of the knocking portion is larger than the cross-section of the knocking body between the fitting portion and the knocking portion.

[0013] As a preference, the quick connector is a square head.

[0014] The beneficial effects of the large-diameter long-arm pedicle screw assembly tool of the present utility model: The design of the knocking body realizes the one-step placement of the annular washer into the long-arm screw seat, reducing the adjustment times of the annular washer during the assembly process, and significantly improving the assembly accuracy and efficiency; through the assembly tool with the integrated design of the screwdriver rod and the knocking body, the screwing of the universal screw and the one-step placement of the annular washer are carried out simultaneously, simplifying the steps of assembling the large-diameter long-arm pedicle screw, thereby improving the assembly efficiency. Description of the Drawings

[0015] Figure 1 is a schematic structural diagram of a large-diameter long-arm pedicle screw;

[0016] Figure 2 is a schematic structural diagram of the large-diameter long-arm pedicle screw assembly tool of the present utility model;

[0017] Figure 3 is a schematic structural diagram of the screwdriver rod of the present utility model;

[0018] Figure 4 is a sectional view of the knocking body of the present utility model;

[0019] In the figure, 1 is the assembly tool, 2 is the screwdriver rod, 21 is the driving portion, 22 is the quick connector, 23 is the holding portion, 3 is the knocking body, 31 is the fitting portion, 311 is the arc convex surface, 312 is the through hole, 32 is the knocking portion, 33 is the through cavity, 4 is the large-diameter long-arm pedicle screw, 41 is the long-arm screw seat, 42 is the universal screw, 43 is the annular washer, and 431 is the arc groove. Detailed Embodiments

[0020] In order to make the purpose, technical solutions and advantages of the present utility model more clear and understandable, the following further details the large-diameter long-arm pedicle screw assembly tool of the present utility model through embodiments and in conjunction with the drawings. It should be understood that the specific embodiments described herein are only illustrative embodiments and are not used to limit the present utility model.

[0021] As Figure 1 shown, the large-diameter long-arm pedicle screw 4 includes a long-arm screw seat 41, a universal screw 42 and an annular washer 43. The bottom of the long-arm screw seat 41 is provided with an internal thread (not shown in the figure) that meshes with the thread of the universal screw 42. The universal screw 42 is installed in the long-arm screw seat 41 by screwing in. The bottom surface of the annular washer 43 abuts against the ball head of the universal screw 42. The annular washer 43 is riveted to the long-arm screw seat 41. The top surface of the annular washer 43 is provided with an arc-shaped groove 431 for placing the connecting rod.

[0022] As Figures 2 - 4 shown, the large-diameter long-arm pedicle screw assembly tool 1 of the present utility model includes: a screwdriver rod 2 and a knocking body 3.

[0023] As Figure 3 shown, the head of the screwdriver rod 2 has a driving part 21 with a specific shape, and the shape of the driving part 21 matches the driving characteristics of the universal screw 42 to ensure that the universal screw 42 can be firmly clamped and rotated. The tail of the screwdriver rod 2 is provided with a quick connector 22. In this embodiment, the quick connector 22 is designed with a square head for easy quick connection and disassembly with the quick-release handle.

[0024] In order to increase the convenience and stability of the operation, a holding part 23 is also provided on the screwdriver rod 2 near the quick connector 22. The holding part facilitates the operator to hold the screwdriver rod 2 during the assembly process and also plays a certain limiting role in the position of the screwdriver rod 2 in the knocking body 3.

[0025] As Figure 4As shown, one end of the striking body 3 is a mating portion 31, which mates with the arc-shaped groove of the annular washer 43. The other end of the striking body 3 is a striking portion 32. Inside the striking body 3, there is a through cavity 33 running through along the length direction. The screwdriver rod 2 is inserted into the striking body 3 along the through cavity 33. The driving portion 21 extends outside the mating portion 31 to connect with the universal screw 42, and the quick connector 22 extends outside the striking portion 32 for easy connection with the quick-release handle. Specifically, the mating portion 31 is perpendicularly connected to the striking body 3 to form a "T"-shaped fixed connection. The opposite side of the mating portion 31 connected to the striking body 3 is set as an arc convex surface 311, and the curvature of the arc convex surface 311 matches the arc-shaped groove of the annular washer 43 to ensure that the annular washer 43 can be stably placed on the mating portion 31. There is also a through hole 312 on the arc convex surface 311, and the through hole 312 is part of the through cavity 33. The cross-section of the striking portion 32 is larger than the cross-section of the striking body 3 between the mating portion 31 and the striking portion 32. Such a design makes the striking portion 32 a good stress point, facilitating the operator to use tools such as a hammer for striking.

[0026] In this embodiment, the striking body 3 and the screwdriver rod 2 are integrally designed. With the exposed driving portion 21, the annular washer 43 passes through the driving portion 21 and then mates with the mating portion 31. During assembly, the annular washer 43 is less likely to be separated from the striking body 3. The striking body 3 can also be used alone. The striking body 3 can place the annular washer 43 into the long-arm screw seat 41 in one step, significantly improving the assembly accuracy and efficiency.

[0027] During the assembly of the large-diameter long-arm pedicle screw, connect the quick connector 22 of the screwdriver rod 2 with the quick-release handle, place the annular washer 43 on the arc convex surface 311 of the mating portion 31; then put the universal screw 42 into the long-arm screw seat 41, align the driving portion 21 of the screwdriver rod 2 with the driving feature of the universal screw 42, and then rotate the screwdriver rod 2 to screw the universal screw 42 into the long-arm screw seat 41 or load the universal screw 42 onto the driving portion 21 of the screwdriver rod 2 and then screw it into the long-arm screw seat 41. When the universal screw 42 is screwed in place, the striking body 3 also sends the annular washer 43 into place; then remove the screwdriver rod 2, and use a hammer to strike the striking portion 32 to make the annular washer 43 be riveted and connected with the long-arm screw seat 41, and finally complete the assembly of the large-diameter long-arm pedicle screw 4.

[0028] Through the above specific implementation manners, the assembly tool for the large-diameter long-arm pedicle screw of the present utility model realizes the simultaneous screwing in of the universal screw and the one-step placement of the annular washer, significantly improving the assembly accuracy and efficiency.

[0029] In summary, the above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A large-diameter long-arm pedicle screw assembly tool, characterized in that: include: A screwdriver bar, the head of the screwdriver bar having a driving portion of any desired shape to match the shape of the driving feature of the universal screw, and the tail of the screwdriver bar having a quick connector that matches the quick-release handle; A striking body, one end of the striking body is set as a matching part that matches the arc groove of the annular gasket, the other end of the striking body is set as a striking part, the inside of the striking body is provided with a through cavity that penetrates the striking body along the length direction, the screwdriver rod is inserted into the striking body along the through cavity, the driving part extends out of the matching part, and the quick connector extends out of the striking part.

2. The assembly tool according to claim 1, characterized in that: The matching portion is vertically connected to the striking body to form a "T"-shaped fixed connection.

3. The assembly tool according to claim 2, characterized in that: The opposite side surface of the matching portion connected to the striking body is configured as an arc convex surface matching the arc groove of the annular gasket, and a through hole is provided on the arc convex surface, and the through hole is a part of the through cavity.

4. The assembly tool according to claim 1, characterized in that: A gripping portion is disposed at a position of the screwdriver rod close to the quick connector, and the gripping portion extends out of the striking portion.

5. The assembly tool according to claim 1, characterized in that: The cross section of the striking portion is larger than the cross section of the striking body between the matching portion and the striking portion.

6. The assembly tool according to claim 1, characterized in that: The quick connector is a square head.

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