Arc-shaped single-arm type finger and metacarpal bone external fixing device

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Through the design of arc-shaped fixing blocks and adjustment components, the problem of the pinhole distance of the existing single-arm external fixing bracket is solved, and the multilateral and multi-plane fixation of the bone needle is achieved, reducing the difficulty of clinical operation and improving the treatment effect.

CN222303997UActive Publication Date: 2025-01-07TIANJIN 272 HOSPITAL

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Patent Information

Application Number: CN202420618749.1
Authority / Receiving Office: CN · China
Patent Type: Utility models(China)
Current Assignee / Owner
Filing Date: 2024-03-28
Publication Date: 2025-01-07
Estimated Expiration: 2034-03-28

AI Technical Summary

Technical Problem

The square clamp design of the existing single-arm finial metacarpophalangeal external fixation stent results in a short pinhole distance, and the bone needles are prone to interfere with each other during needle placement, increasing the difficulty of clinical operation and affecting the treatment effect.

Method used

A curved single-arm type external fixation device of metacarpophalanum is designed, using arc-shaped fixing blocks and adjustment components, widening the spacing of bone pinholes through arc-shaped structure and angle design, and flexible adjustments are achieved through rotating wheels and limiting parts. , avoid interference from bone needles.

Benefits of technology

The design of arc structure and adjustment components effectively avoids interference between bone needles, reduces the difficulty of clinical operation, improves the multilateral and multi-plane fixation capability of bone needles, and simplifies the clinical operation process.

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Abstract

An arc-shaped single-arm type finger and metacarpal bone external fixing device comprises a supporting rod, a fixing block, an adjusting assembly and a bone needle. The fixing block is connected to the supporting rod. A plurality of bone needle holes are formed in the two side faces of the fixing block, and the bone needles are connected into the bone needle holes. An included angle is formed between the central axes of the bone needles on the two side surfaces of the fixing block; the fixing block is of an arc-shaped structure; the adjusting assembly comprises a rotating wheel and a limiting piece. The rotating wheel is sleeved on the supporting rod; one end of the limiting piece is connected to the side face of the rotating wheel, and the other end of the limiting piece is screwed to the supporting rod. Bone needle holes are formed in the positions, located at the two ends of the supporting rod, of the fixing block of the arc-shaped structure, bone needles can be installed in the bone needle holes according to the requirement of a doctor, the fixing block is of the arc-shaped structure, the bone needles on the two sides of the fixing block are not parallel, then the distance between the bone needle holes is widened, and the purpose of multi-edge and multi-plane fixing can be achieved; mutual interference between bone needles is avoided, and clinical operation difficulty is reduced.

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Description

Technical Field

[0001] The utility model belongs to the technical field of medical instruments, and in particular relates to an arc-shaped single-arm metacarpal external fixation device. Background Art

[0002] A single-arm external fixator is a support device used in orthopedic external fixation surgery in conjunction with a metal bone pin. With the continuous development of science and technology, people have higher requirements for the manufacturing process of the single-arm external fixator.

[0003] However, the existing single-arm metacarpal bone external fixator is designed with a square clamp block, the distance between the pinholes is too short, and the external fixation half pin is fixed in a single plane. It is found in clinical practice that the two bone pins will interfere with each other during the needle placement process and the needle placement area is relatively limited due to the influence of the clamp block, which increases the difficulty of clinical operation and affects the clinical treatment effect. Utility Model Content

[0004] In view of this, the utility model aims to propose an arc-shaped single-arm metacarpal external fixation device to solve the technical problems existing in the prior art, that is, the existing single-arm metacarpal external fixation bracket is designed as a square clamp block, the pinhole distance is too short, and the external fixation half pin is fixed in a single plane, and it is found in clinical practice that the two bone pins will interfere with each other during the needle placement process during the operation and the needle placement area is relatively limited due to the influence of the clamp block, which increases the difficulty of clinical operation and affects the clinical treatment effect.

[0005] In order to achieve the above object, the technical solution of the utility model is implemented as follows:

[0006] An arc-shaped single-arm metacarpal bone external fixation device comprises a support rod, a fixing block, an adjustment component and a bone pin;

[0007] The fixing block is connected to the support rod;

[0008] Bone pin holes are arranged on both side surfaces of the fixing block, and the number of the bone pin holes is set to be multiple, and multiple bone pins are connected in the bone pin holes;

[0009] An angle is formed between the central axes of the bone pins on both sides of the fixing block;

[0010] The fixed block is arranged in an arc-shaped structure;

[0011] The adjustment assembly includes a rotating wheel and a limiting member;

[0012] The rotating wheel is sleeved on the supporting rod; one end of the limiting member is connected to the side surface of the rotating wheel, and the other end of the limiting member is screwed on the supporting rod.

[0013] Furthermore, the limiting member includes a receiving sleeve and a limiting ring; one end of the receiving sleeve is connected to one end of the rotating wheel, and the other end of the receiving sleeve is connected to one end of the limiting ring;

[0014] A limiting groove is provided on the fixed block, and a limiting ring is connected in the limiting groove;

[0015] A limiting piece is arranged on the limiting ring, and a limiting concave cavity matching with the limiting piece is arranged in the limiting groove.

[0016] Furthermore, an adjusting opening is provided on the rotating wheel.

[0017] Furthermore, the outer peripheral surface of the rotating wheel is provided with anti-slip grooves.

[0018] Furthermore, the anti-skid patterns on the outer peripheral surface of the rotating wheel are configured as patterns protruding outwards.

[0019] Furthermore, a fixing piece is provided on the side of the fixing block.

[0020] Compared with the prior art, the arc-shaped single-arm metacarpal external fixation device of the utility model has the following advantages:

[0021] (1) The arc-shaped fixing block of the utility model is provided with bone pin holes at both ends of the support rod, and bone pins can be installed in the bone pin holes according to the doctor's needs. Since the structure of the fixing block is set as an arc structure, the bone pins on both sides of the fixing block are not parallel, thereby widening the distance between the bone pin holes. The arc-shaped fixing block can be set to different arcs according to actual conditions. The bone pins on both sides have an angle in the bone, which can achieve the purpose of multilateral and multi-plane fixation, avoid mutual interference between the bone pins, and reduce the difficulty of clinical operation.

[0022] (2) The right end of the receiving sleeve of the utility model is fixedly connected to the left side surface of the rotating wheel. The rotating wheel is provided with an internal thread. The rotating wheel is threaded on the support rod. The left end of the receiving sleeve is fixedly connected to the right end of the limiting ring. The receiving sleeve not only plays a receiving role, but also can separate the rotating wheel and the fixed block by a certain distance, so that the doctor can adjust the rotating wheel easily.

[0023] (3) The utility model has a limit groove on the fixed block, and the limit ring is rotatably connected in the limit groove on the fixed block. The limit ring is provided with a limit plate, and the limit plate is clamped in the limit cavity in the limit groove, which can prevent the limit ring from escaping from the limit groove and avoid affecting the rotation connection of the limit ring on the fixed block, thereby increasing the flexibility of the limit member. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the accompanying drawings:

[0025] Figure 1 This is a schematic structural diagram of an arc-shaped single-arm metacarpal bone external fixation device according to an embodiment of the utility model;

[0026] Figure 2 This is a schematic diagram of the structure of the fixing block according to an embodiment of the utility model;

[0027] Figure 3 It is a structural schematic diagram of the adjustment component described in an embodiment of the utility model.

[0028] Description of reference numerals:

[0029] 100-support rod; 200-fixed block;

[0030] 201- bone pin hole; 202- fixing piece;

[0031] 300-adjustment component; 301-rotating wheel;

[0032] 302-limiting piece;

[0033] 304- receiving sleeve; 305- limiting ring;

[0034] 203-limiting groove; 307-limiting piece;

[0035] 204-limiting cavity; 309-adjusting port;

[0036] 400-Bone needles. DETAILED DESCRIPTION

[0037] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0038] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0039] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0040] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0041] like Figures 1 to 3 As shown, the utility model provides an arc-shaped single-arm metacarpal external fixation device, comprising a support rod 100, a fixing block 200, an adjustment assembly 300 and a bone pin 400;

[0042] The fixing block 200 is connected to the support rod 100;

[0043] Bone pin holes 201 are provided on both sides of the fixing block 200. The number of the bone pin holes 201 is set to be multiple, and multiple bone pins 400 are connected in the bone pin holes 201;

[0044] An angle is formed between the central axes of the bone pins 400 on both sides of the fixing block 200;

[0045] The fixing block 200 is configured as an arc-shaped structure;

[0046] The adjustment assembly 300 includes a rotating wheel 301 and a limiting member 302;

[0047] The rotating wheel 301 is sleeved on the support rod 100 ; one end of the limiting member 302 is connected to the side of the rotating wheel 301 , and the other end of the limiting member 302 is screwed on the support rod 100 .

[0048] In one embodiment of the present invention, Figure 1 , Figure 2 , Figure 3 As shown, the support rod 100 is installed in the middle position of the fixed block 200 of the arc structure. Multiple fixed blocks 200 can be installed on the support rod 100 according to the doctor's needs. An external thread is provided on the outer peripheral surface of the support rod 100. The rotating wheel 301 of the adjusting component 300 is screwed on the support rod 100, and the limiting member 302 of the adjusting component 300 is connected to the fixed block 200. The medical staff rotates the rotating wheel 301, and the rotating wheel 301 drives the limiting member 302 to move left and right on the support rod 100, and then the limiting member 302 drives the fixed block 200 to move left and right on the support rod 100.

[0049] The arc-shaped fixing block 200 is provided with bone pin holes 201 at both ends of the support rod 100. Bone pins 400 can be installed in the bone pin holes 201 according to the doctor's needs. Since the structure of the fixing block 200 is set as an arc-shaped structure, the bone pins 400 on both sides of the fixing block 200 are not parallel, thereby widening the distance between the bone pin holes 201. The curvature of the fixing block 200 can be set to 5, or set to other curvatures according to actual conditions. There is 0. ～ The 90° angle can achieve the purpose of multi-sided and multi-plane fixation, avoid mutual interference between the bone pins 400, and reduce the difficulty of clinical operation.

[0050] More preferably, the limiting member 302 includes a receiving sleeve 304 and a limiting ring 305; one end of the receiving sleeve 304 is connected to one end of the rotating wheel 301, and the other end of the receiving sleeve 304 is connected to one end of the limiting ring 305;

[0051] The fixing block 200 is provided with a limiting groove 203, and the limiting ring 305 is connected in the limiting groove 203;

[0052] A limiting piece 307 is disposed on the limiting ring 305 , and a limiting cavity 204 matching the limiting piece 307 is disposed in the limiting groove 203 .

[0053] In one embodiment of the present invention, Figure 2 , Figure 3 As shown, the right end of the receiving sleeve 304 is fixedly connected to the left side surface of the rotating wheel 301, the rotating wheel 301 is provided with an internal thread, the rotating wheel 301 is screwed on the support rod 100, and the left end of the receiving sleeve 304 is fixedly connected to the right end of the limiting ring 305. The receiving sleeve 304 not only plays a supporting role, but also can separate the rotating wheel and the fixed block 200 by a certain distance, so as to facilitate the doctor to adjust the rotating wheel 301.

[0054] A limiting groove 203 is provided on the fixed block 200, and a limiting ring 305 is rotatably connected in the limiting groove 203 on the fixed block 200. A limiting plate 307 is provided on the limiting ring 305, and the limiting plate 307 is clamped in the limiting cavity 204 in the limiting groove 203, which can prevent the limiting ring 305 from escaping from the limiting groove 203, and can also avoid affecting the rotational connection of the limiting ring 305 on the fixed block 200, thereby increasing the flexibility of the limiting member 302.

[0055] More preferably, an adjustment opening 309 is provided on the rotating wheel 301 .

[0056] In one embodiment of the present invention, Figure 2 , Figure 3 As shown, an inwardly recessed adjustment opening 309 is provided on the rotating wheel 301 , and the adjustment opening 309 can help the doctor use a tool to enter the adjustment opening 309 , and then turn the rotating wheel, thereby improving the doctor's efficiency.

[0057] More preferably, the outer peripheral surface of the rotating wheel 301 is provided with anti-slip grooves.

[0058] In one embodiment of the present invention, Figure 2 , Figure 3 As shown, the outer circumferential surface of the rotating wheel 301 is provided with anti-skid grooves to increase the friction between the doctor's fingers and the rotating wheel 301 and prevent the fingers from slipping.

[0059] More preferably, the anti-slip pattern on the outer peripheral surface of the rotating wheel 301 is configured as a pattern protruding outward.

[0060] In one embodiment of the present invention, Figure 2 , Figure 3 As shown, the anti-skid pattern on the outer peripheral surface of the rotating wheel 301 is configured as a pattern protruding outwards, thereby increasing the friction between the doctor's fingers and the rotating wheel 301 .

[0061] More preferably, a fixing piece 202 is provided on a side of the fixing block 200 .

[0062] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An arc-shaped single-arm metacarpal external fixation device, characterized in that: It comprises a support rod (100), a fixing block (200), an adjustment component (300) and a bone needle (400); The fixing block (200) is connected to the supporting rod (100); Bone pin holes (201) are provided on both side surfaces of the fixing block (200), the number of the bone pin holes (201) is set to be multiple, and the multiple bone pins (400) are connected to the bone pin holes (201); An angle is formed between the central axes of the bone pins (400) on both side surfaces of the fixing block (200); The fixing block (200) is configured as an arc-shaped structure; The adjustment component (300) comprises a rotating wheel (301) and a limiting member (302); The rotating wheel (301) is sleeved on the support rod (100); one end of the limiting member (302) is connected to the side surface of the rotating wheel (301), and the other end of the limiting member (302) is screwed on the support rod (100).

2. The arc-shaped single-arm metacarpal external fixation device according to claim 1, characterized in that: The limiting member (302) comprises a receiving sleeve (304) and a limiting ring (305); one end of the receiving sleeve (304) is connected to one end of the rotating wheel (301), and the other end of the receiving sleeve (304) is connected to one end of the limiting ring (305); The fixing block (200) is provided with a limiting groove (203), and the limiting ring (305) is connected in the limiting groove (203); The limiting ring (305) is provided with a limiting plate (307), and the limiting groove (203) is provided with a limiting cavity (204) matching the limiting plate (307).

3. The arc-shaped single-arm metacarpal external fixation device according to claim 2, characterized in that: The rotating wheel (301) is provided with an adjustment opening (309).

4. The arc-shaped single-arm metacarpal external fixation device according to claim 3, characterized in that: The outer peripheral surface of the rotating wheel (301) is provided with anti-slip grooves.

5. The arc-shaped single-arm metacarpal external fixation device according to claim 4, characterized in that: The anti-slip patterns on the outer peripheral surface of the rotating wheel (301) are arranged as patterns protruding outwards.

6. The arc-shaped single-arm metacarpal external fixation device according to claim 5, characterized in that: A fixing piece (202) is provided on the side of the fixing block (200).