Distal radius fracture external fixation brace capable of maintaining traction force

Abstract

The utility model discloses a distal radius fracture external fixation brace capable of maintaining traction force, which comprises a forearm module and a palm module, a connecting module is arranged between the forearm module and the palm module, and the forearm module is movably connected with the palm module. And the connecting module comprises an arc-shaped connecting piece, a flexion and extension locking mechanism, a movable plate group and a traction part. By means of movable connection and a fine adjustment mechanism, the wrist movement range and the traction force can be accurately controlled, the treatment adaptability is improved through the adjustable traction force and the adjustable movement range, and the protector can be adjusted according to the specific recovery conditions and requirements of a patient. Not only the comfort of the patient is improved, but also early rehabilitation activities are facilitated by allowing controllable wrist flexion and extension rotational motion. The movement range of the wrist and the applied traction force can be flexibly adjusted according to the recovery stage and demand of a patient, the stability of the interruption end in the fracture reduction process is ensured, and correct healing of the fracture is facilitated.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of fracture fixing rehabilitation aids, especially a radius distal end fracture external fixation brace capable of maintaining traction. BACKGROUND

[0002] Ulna and radius are two long bones of the forearm of the human body, when the palm of the human body faces forward, the one close to the body side is radius, and the one far from the body side is ulna. Ulnar deviation, radial deviation, palm flexion and dorsal extension are several common movement forms of the wrist joint, among which ulnar deviation is the wrist joint tilting to the ulna side, radial deviation is the wrist joint tilting to the radius side, palm flexion is the wrist joint rotating to the palm side of the hand, and dorsal extension is the wrist joint rotating to the back side of the hand. The above four movements can be combined to realize the rotation of the wrist joint.

[0003] Radius distal end fracture is the most common type of fracture of the upper limb, and the affected part needs to be fixed first after manual reduction. The commonly used fixing methods at present include plaster fixing, small splint fixing and high molecular bandage fixing, etc., which all have their own defects, such as heavy plaster fixing, poor air permeability; if small splint fixing is not used properly, it is easy to press the patient's bone fascia and cause bone fascia syndrome; high molecular bandage has poor plasticity.

[0004] The prior application (application number 202210356923.5) is an invention patent related to a radius distal end fracture external fixation rehabilitation aid, which can meet the needs of patients to fix the affected part and early rehabilitation training. It can solve the problems of poor air permeability of traditional fixing methods, excessive local pressure caused by the shape of the fixator not adapting to the patient's body surface, and difficulty in changing the fixed posture, etc. It is convenient to wear and can be adjusted according to the swelling of the affected part. The radius distal end fracture fixing aid includes a forearm module, a front and rear connecting module and a palm module. The forearm module and the palm module are completed by reverse modeling, the front and rear connecting module connects the forearm module and the palm module to form the main body of the aid, and can be connected with the forearm module to realize the locking of the palm flexion and dorsal extension direction of the wrist, and connected with the palm module to realize the locking of the radial deviation and ulnar deviation direction. It is more suitable for the rehabilitation needs of patients with radius distal end fracture.

[0005] In actual application, the above-mentioned scheme still has some deficiencies, such as the aid cannot maintain the continuous traction of the wrist after being worn, the comfort needs to be improved after being worn for a long time, and continuous traction is helpful to the maintenance of the position of the fracture end, and the lack of continuous and effective traction will affect the rehabilitation efficiency.

[0006] Therefore, it is necessary to develop a radius distal end fracture external fixation brace capable of maintaining traction to solve the above-mentioned problems. UTILITY MODEL CONTENTS

[0007] The utility model aims at solving the technical problem of the prior art, and provides a radial distal end fracture external fixation brace capable of maintaining traction, which provides significant improvement in enhancing fracture end stability and rehabilitation efficiency, the design of the brace allows continuous maintenance of the overall traction required by the fracture end, which is a key function for maintaining correct fracture reduction, and overcomes the technical defects of the prior art in the background art.

[0008] To solve the above technical problems, the utility model adopts the technical scheme of:

[0009] A radial distal end fracture external fixation brace capable of maintaining traction, comprising a forearm module and a palm module, a connecting module is arranged between the forearm module and the palm module, so that the forearm module and the palm module are movably connected, and the connecting module comprises an arc-shaped connecting piece, a flexion and extension locking mechanism, a movable plate set and a traction part.

[0010] The arc-shaped connecting piece and the flexion and extension locking mechanism cooperate to enable the palm module to swing up and down or be fixed at a limited angle relative to the forearm module in the palm flexion or dorsiflexion direction.

[0011] The arc-shaped connecting piece and the movable plate set cooperate to enable the palm module to swing left and right or be fixed at a limited angle relative to the forearm module in the radial deviation or ulnar deviation direction.

[0012] The traction part enables the palm module to adjust the distance relative to the forearm module to continuously maintain the traction of the fracture end.

[0013] The traction part comprises a limiting sleeve that is detachably installed at the end of the forearm module, the limiting sleeve is integrally provided with a pressing sleeve at the side end away from the forearm module, and the internal slide channel of the pressing sleeve is communicated with the internal slide channel of the limiting sleeve, an integral clamping connecting piece is slidably arranged in the internal slide channel of the limiting sleeve, the side surface of the integral clamping connecting piece is provided with a rack, a tooth block is fitted and slidably arranged in the internal slide channel of the pressing sleeve, a lateral key bolt is threadedly connected to the outer wall of the pressing sleeve, and the lateral key bolt is rotatably connected to the tooth block, and when the tooth block moves to the end of the pressing sleeve close to the limiting sleeve, the tooth block is engaged and locked with the rack.

[0014] A pressing part is installed in the inner side of the palm module and is used for elastically adhering and supporting the surface of the palm.

[0015] Preferably, a clamping groove is formed at the end of the integral clamping connecting piece, a limiting block is arranged in the clamping groove, the limiting block and the integral clamping connecting piece are fixed by a screw, the outer wall of the limiting block is fitted with and slidably matched with the internal slide channel of the limiting sleeve, and a necked block is arranged at one end of the internal slide channel of the limiting sleeve, and is used for limiting the movement range of the integral clamping connecting piece in the slide channel.

[0016] Preferably, the forearm support upper clamping plate and the forearm support lower clamping plate are oppositely arranged and the edges thereof are embedded into each other.

[0017] The palm module comprises a palm plate and a palm back plate, and the palm plate and the palm back plate are oppositely arranged and the edges thereof are embedded into each other.

[0018] Preferably, the forearm support upper clamping plate and the forearm support lower clamping plate are oppositely arranged and the edges thereof are embedded into each other.

[0019] Preferably, the number of the limiting sleeves is two, and the two limiting sleeves are symmetrically distributed on both sides of the forearm module. At least two threaded holes are formed in the sidewall of the limiting sleeve, and a combination bolt is arranged in the threaded hole. The limiting sleeve is installed on the forearm support upper clamping plate or the forearm support lower clamping plate through the combination bolt.

[0020] Preferably, the forearm support upper clamping plate and the forearm support lower clamping plate are oppositely arranged and the edges thereof are embedded into each other.

[0021] Preferably, the movable plate set comprises a limiting hole plate slidably connected to the arc-shaped connecting piece. An arc-shaped sliding rail is formed in the arc-shaped connecting piece, and a plurality of first pin holes are linearly arranged in the arc-shaped sliding rail. A limiting boss is fixed to the palm back plate, and the limiting boss is fixedly connected to the limiting hole plate through a screw. The limiting boss slides along the arc-shaped sliding rail and is located on the inner side of the arc-shaped sliding rail.

[0022] A second pin hole is formed in the limiting hole plate and matches the first pin hole. A locking pin is jointly inserted into the first pin hole and the second pin hole, and the limiting hole plate is provided with a pin limiting cover.

[0023] Preferably, the limiting hole plate and the locking pin are made of a magnetic metal material, and the pin limiting cover is made of a permanent magnet material. A groove is formed in the bottom of the pin limiting cover for accommodating the locking pin.

[0024] Preferably, the flexion and extension locking mechanism comprises a locking counterpart tooth and a lateral locking tooth matched with the locking counterpart tooth, both ends of the arc-shaped connecting piece are provided with flexion and extension adjustment holes, the end of the integrated hinged connecting piece is provided with a polygonal hole slot, the locking counterpart tooth and the lateral locking tooth are embedded in the inside of the flexion and extension adjustment hole and the polygonal hole slot respectively, a hexagonal bolt is embedded at the axial center of the lateral locking tooth, the hexagonal bolt penetrates the locking counterpart tooth and is threadedly connected with a torx nut, the locking counterpart tooth is locked with the lateral locking tooth through the hexagonal bolt, an axial limiting ring is arranged on the outer end surface of the locking counterpart tooth, the end of the axial limiting ring is movably sleeved with the torx nut, and a spring is sleeved outside the hexagonal bolt and between the locking counterpart tooth and the lateral locking tooth.

[0025] Preferably, the compression part adopts an air bag body, and a gas filling and discharging hole is arranged on the air bag body, a valve core is arranged in the gas filling and discharging hole, and a valve cover is arranged outside the gas filling and discharging hole.

[0026] The wrist rehabilitation brace has the following beneficial effects:

[0027] 1. By adopting the movable connection and fine adjustment mechanism, the range of wrist movement and the size of traction force can be accurately controlled, the adjustable traction force and movement range improve the adaptability of treatment, the brace can be adjusted according to the specific recovery condition and needs of the patient. Not only the comfort of the patient is improved, but also the early rehabilitation activity is promoted by allowing controllable wrist flexion and extension rotation. The range of wrist movement and the applied traction force can be flexibly adjusted according to the recovery stage and needs of the patient, the stability of the fracture end during the fracture reduction process is ensured, and the correct healing of the fracture is facilitated.

[0028] 2. By designing the integrated movement range adjustment function, the multi-position adjustment is provided with a lock, the medical provider or the patient can adjust the movement range of the wrist according to the rehabilitation progress, the wrist flexion and rotation are allowed, after the fracture is preliminarily stabilized, the patient can perform limited wrist movement under the guidance of the doctor, which helps to improve blood circulation, promote the healing of the injured area and significantly reduce the pain, not only helps to maintain the physiological activity of the wrist and forearm, but also prevents joint stiffness or muscle atrophy that may occur after long-term fixation.

[0029] 3. By adopting the easy-to-operate adjustment structure and its adjustment mode, the patient can adjust the traction force and support angle by himself without external help, which reduces the dependence on medical personnel, so that the patient can use the brace more comfortably and effectively at home, the convenience of self-management of the user is considered in the design of the brace, the frequency of medical visits is reduced, thereby optimizing the rehabilitation process and reducing the treatment cost. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 The wrist rehabilitation brace provided by the utility model is used for the treatment of distal radius fractures.

[0031] Figure 2 The overall structure perspective view of the distal radius fracture external fixation brace provided by the utility model is shown in the figure;

[0032] Figure 3 The overall structure side view of the distal radius fracture external fixation brace provided by the utility model is shown in the figure;

[0033] Figure 4 The overall structure top view of the distal radius fracture external fixation brace provided by the utility model is shown in the figure;

[0034] Figure 5 The utility model provides Figure 4 The overall structure perspective view of the distal radius fracture external fixation brace provided by the utility model is shown in the figure;

[0035] Figure 6 The overall structure schematic view of the connecting module in the utility model is shown in the figure;

[0036] Figure 7 The cooperation structure explosion view of the arc-shaped connecting piece and the flexion and extension locking mechanism in the utility model is shown in the figure;

[0037] Figure 8 The combination structure display view of the integral type occlusion connecting piece and the flexion and extension locking mechanism in the utility model is shown in the figure;

[0038] Figure 9 The structure schematic view of the integral type occlusion connecting piece (mounting side locking tooth and limiting block) in the utility model is shown in the figure;

[0039] Figure 10 The first view angle explosion view of the movable plate group in the utility model is shown in the figure;

[0040] Figure 11 The second view angle explosion view of the movable plate group in the utility model is shown in the figure.

[0041] Among them:

[0042] Lower arm module-1, connecting module-2, palm module-3, compression part-4, threaded hole-5;

[0043] Upper forearm support clamping plate-11, lower forearm support clamping plate-12;

[0044] Arc-shaped connecting piece-21, flexion and extension locking mechanism-22, movable plate group-23, traction part-24;

[0045] Palm plate-31, palm back plate-32;

[0046] Locking matching tooth-221, side locking tooth-222, flexion and extension adjusting hole-223, polygonal hole groove-224, hexagonal bolt-225, key nut-226, axial limiting ring-227, spring-228;

[0047] Limiting hole plate-231;Arc-shaped slide rail-232;First pin hole-233;Limiting boss-234;Second pin hole-235;Locking pin-236;Pin limiting cover-237;Groove-238;

[0048] Limiting sleeve-241;Top pressing sleeve-242;Integrated snap connector-243;Rack-244;Tooth block-245;Lateral key bolt-246;

[0049] Clamping groove-2431;Limiting block-2432. DETAILED DESCRIPTION

[0050] The utility model will be further explained in detail below in combination with the drawings and specific preferred embodiments.

[0051] In the description of the utility model, it should be understood that the orientation or position relationship indicated by the terms "left side", "right side", "upper part", "lower part" and the like is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and "first", "second" and the like do not represent the importance of the parts, so it cannot be understood as a limitation on the utility model. The specific size used in the embodiment is only used to illustrate the technical scheme, and does not limit the protection scope of the utility model.

[0052] As Figures 1-11 shown, a radial distal fracture external fixation brace capable of maintaining traction force, comprising a forearm module 1 and a palm module 3, a connecting module 2 is arranged between the forearm module 1 and the palm module 3, so that the forearm module 1 and the palm module 3 are movably connected, the connecting module 2 comprises an arc-shaped connecting piece 21, a flexion and extension locking mechanism 22, a movable plate group 23 and a traction part 24;

[0053] The arc-shaped connecting piece 21 and the flexion and extension locking mechanism 22 cooperate to enable the palm module 3 to swing up and down or be fixed at a limited angle relative to the forearm module 1 in the palm flexion or dorsiflexion direction;

[0054] The arc-shaped connecting piece 21 and the movable plate group 23 cooperate to enable the palm module 3 to swing left and right or be fixed at a limited angle relative to the forearm module 1 in the radial deviation or ulnar deviation direction;

[0055] The traction part 24 enables the palm module 3 to adjust the distance relative to the forearm module 1 to continuously maintain the traction force of the fracture end;

[0056] In the above scheme, the angle of the left-right swing in the radial deviation or ulnar deviation direction and the up-down swing in the palmar flexion or dorsal extension direction can be adjusted simultaneously. The palm module 3 is moved in the axial direction of the forearm module 1 by the traction part 24, so that the distance between the forearm module 1 and the palm module 3 can be adjusted according to actual needs.

[0057] The traction part 24 comprises a limiting sleeve 241 detachably mounted at the end of the forearm module 1, the limiting sleeve 241 is integrally provided with a pressing sleeve 242 at the side end away from the forearm module 1, the internal slide of the pressing sleeve 242 is communicated with the internal slide of the limiting sleeve 241, an integrated clamping connector 243 is slidingly arranged in the internal slide of the limiting sleeve 241, the side surface of the integrated clamping connector 243 is provided with a rack 244, the integrated clamping connector 243 moves longitudinally in the internal slide of the limiting sleeve 241, a tooth block 245 is fitted and slidingly arranged in the internal slide of the pressing sleeve 242, the outer wall of the pressing sleeve 242 is threadedly connected with a lateral star-shaped bolt 246, and the lateral star-shaped bolt 246 is rotationally connected with the tooth block 245, when the tooth block 245 moves to the end of the pressing sleeve 242 close to the limiting sleeve 241, the tooth block 245 is engaged and locked with the rack 244, thereby playing a traction and fixing role, when the lateral star-shaped bolt 246 is loosened, the traction tooth block 245 is separated from the rack 244, so that the integrated clamping connector 243 can move longitudinally.

[0058] The pressing part 4 is mounted inside the palm module 3, and is used to elastically adhere and support the palm surface.

[0059] Specifically, in the above technical scheme, a clamping groove 2431 is formed at the end of the integrated clamping connector 243, a limiting block 2432 is arranged in the clamping groove 2431, and the limiting block 2432 is fixed with the integrated clamping connector 243 by screws, the outer wall of the limiting block 2432 is fitted with and slidingly matched with the internal slide of the limiting sleeve 241, and a necked blocking block is arranged at one end of the internal slide of the limiting sleeve 241, which is used to limit the movement range of the integrated clamping connector 243 in the slide, and prevent the integrated clamping connector 243 from being pulled out due to excessive force during adjustment.

[0060] Specifically, in the above technical scheme, the forearm module 1 and the palm module 3 are both formed by 3D printing with medical plastic material, the forearm module 1 comprises a forearm support upper clamping plate 11 and a forearm support lower clamping plate 12, the forearm support upper clamping plate 11 and the forearm support lower clamping plate 12 are oppositely arranged and the edges thereof are embedded with each other.

[0061] The palm module 3 comprises a palm plate 31 and a palm back plate 32, the palm plate 31 and the palm back plate 32 are oppositely arranged and the edges thereof are embedded with each other.

[0062] Specifically, in the above technical scheme, the upper forearm support clamping plate 11 and the lower forearm support clamping plate 12 are provided with strip-shaped holes corresponding in distribution on the outer sides of the upper forearm support clamping plate 11 and the lower forearm support clamping plate 12 and the outer sides of the palm plate 31 and the back of the palm plate 32, which are used for clamping and assembling the forearm module 1 and the palm module 3 by magic tape.

[0063] Specifically, in the above technical scheme, the number of the limiting sleeve 241 is two, and the two limiting sleeves 241 are symmetrically distributed on both sides of the forearm module 1. At least two threaded holes 5 are formed in the sidewall of the limiting sleeve 241, and a combination bolt is arranged in the threaded hole 5. The limiting sleeve 241 is installed on the upper forearm support clamping plate 11 or the lower forearm support clamping plate 12 by the combination bolt.

[0064] Specifically, in the above technical scheme, the inner side of both ends of the upper forearm support clamping plate 11 and the lower forearm support clamping plate 12 is provided with a buffer layer, and the buffer layer is made of medical silica gel material.

[0065] Specifically, in the above technical scheme, the movable plate group 23 includes a limiting hole plate 231 slidably connected to the arc-shaped connecting piece 21. The arc-shaped connecting piece 21 is provided with an arc-shaped sliding rail 232. A plurality of first pin holes 233 are linearly arranged along the trajectory direction of the arc-shaped sliding rail 232. The back of the palm plate 32 is fixed with a limiting boss 234, and the limiting boss 234 is fixedly connected to the limiting hole plate 231 by a screw. The limiting boss 234 slides along the trajectory direction of the arc-shaped sliding rail 232 and is located on the inner side of the arc-shaped sliding rail 232.

[0066] The limiting hole plate 231 is provided with a second pin hole 235 matched with the first pin hole 233. The second pin hole 235 and the first pin hole 233 that is moved to the corresponding position are jointly inserted with a locking pin 236. The limiting hole plate 231 is provided with a pin limiting cover 237 at the top for blocking and closing the top of the second pin hole 235 to prevent the locking pin 236 from falling out.

[0067] Specifically, in the above technical scheme, the limiting hole plate 231 and the locking pin 236 are made of magnetic metal material, and the pin limiting cover 237 is made of permanent magnet material. The bottom of the pin limiting cover 237 is provided with a groove 238 for accommodating the locking pin 236.

[0068] Specifically, in the above technical scheme, the flexion and extension locking mechanism 22 includes a locking counterpart tooth 221 and a lateral locking tooth 222 matched with the locking counterpart tooth 221, both ends of the arc-shaped connecting piece 21 are provided with flexion and extension adjustment holes 223, and a polygonal hole groove 224 is formed in the one-end part of the integrated occlusion connecting piece 243; the locking counterpart tooth 221 and the lateral locking tooth 222 are respectively embedded in the inside of the flexion and extension adjustment holes 223 and the polygonal hole groove 224; a hexagonal bolt 225 is embedded at the axial center of the lateral locking tooth 222, penetrates the locking counterpart tooth 221 and is threadedly connected with a torx nut 226; the locking counterpart tooth 221 and the lateral locking tooth 222 are locked through the hexagonal bolt 225; an axial limiting ring 227 is arranged on the outer end surface of the locking counterpart tooth 221, and the end part of the axial limiting ring 227 is movably sleeved with the torx nut 226; a spring 228 is sleeved on the outer side of the hexagonal bolt 225 and between the locking counterpart tooth 221 and the lateral locking tooth 222. When the torx nut 226 is screwed, the axial limiting ring 227 can uniformly transmit force to the locking counterpart tooth 221, so as to further make the locking counterpart tooth 221 and the lateral locking tooth 222 close to each other and be locked. Specifically, the lateral locking tooth 222 is provided with a first annular tooth groove on one side; the locking counterpart tooth 221 is provided with a second annular tooth groove matched with the first annular tooth groove on one side; the spring 228 is sleeved on the outer side of the first annular tooth groove and the second annular tooth groove at both ends, respectively; and after the first annular tooth groove and the second annular tooth groove are contacted and locked through the hexagonal bolt 225, the first annular tooth groove and the second annular tooth groove can be locked, so as to prevent the relative displacement of the locking counterpart tooth 221 and the lateral locking tooth 222. When the wrist part needs to be moved, the torx nut 226 is loosened, and the locking counterpart tooth 221 and the lateral locking tooth 222 are separated under the action of the spring 228.

[0069] Specifically, in the above technical scheme, the compression part 4 adopts a gas bag body, a gas inlet and outlet hole is arranged on the gas bag body, a valve core is arranged in the gas inlet and outlet hole, and a valve cover is arranged on the outer side of the gas inlet and outlet hole.

[0070] The radial distal fracture external fixation brace provided by the utility model is used, the hand and the hand of the patient are scanned, then the forearm support upper clamping plate 11 and the forearm support lower clamping plate 12 of the corresponding forearm module 1 and the palm module 3 and the palm plate 31 and the palm back plate 32 are made by adopting the mode taking and pouring or 3D printing forming, the doctor installs according to the actual situation, adjusts the initial installation state, and performs initial recovery traction treatment.

[0071] The brace is provided with a connecting module 2 composed of an arc-shaped connecting piece 21, a flexion and extension locking mechanism 22, a movable plate group 23 and a traction part 24. The arc-shaped connecting piece 21 and the flexion and extension locking mechanism 22 cooperate to make the palm module 3 swing up and down or be fixed at a limited angle relative to the lower arm module 1 in the palm flexion or dorsiflexion direction; the arc-shaped connecting piece 21 and the movable plate group 23 cooperate to make the palm module 3 swing left and right or be fixed at a limited angle relative to the lower arm module 1 in the radial deviation or ulnar deviation direction; the traction part 24 makes the palm module 3 adjust the distance relative to the lower arm module 1 to continuously maintain the traction force of the fracture end; the angle-adjustable left and right swing in the radial deviation or ulnar deviation direction and the up and down swing in the palm flexion or dorsiflexion direction can be performed simultaneously. The palm module 3 is moved in the axial direction of the lower arm module 1 through the traction part 24, so that the distance between the lower arm module 1 and the palm module 3 can be adjusted according to actual needs. The range of wrist movement and the traction force applied can be flexibly adjusted according to the stage and needs of patient recovery, so as to maintain reduction and promote rehabilitation.

[0072] The embodiments of the utility model are described in detail above in combination with the drawings, but the utility model is not limited to the described embodiments. For those skilled in the art, various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the utility model, and still fall within the protection scope of the utility model.

Claims

1. A kind of distal radius fracture external fixation brace of sustainable traction, including small arm module (1) and palm module (3), connection module (2) is arranged between small arm module (1) and palm module (3), so that small arm module (1) is movably connected with palm module (3), it is characterized in that: The connecting module (2) comprises an arc-shaped connecting piece (21), a flexion and extension locking mechanism (22), a movable plate group (23) and a traction part (24); The arc-shaped connecting piece (21) and the flexion and extension locking mechanism (22) cooperate to enable the palm module (3) to swing up and down or be fixed at a limited angle relative to the forearm module (1) in the direction of palm flexion or extension; The arc-shaped connecting piece (21) and the movable plate group (23) cooperate to enable the palm module (3) to swing left and right or be fixed at a limited angle relative to the forearm module (1) in the direction of radial deviation or ulnar deviation; The traction part (24) enables the palm module (3) to adjust the distance relative to the forearm module (1) to continuously maintain the traction force of the fractured end; The traction part (24) comprises a limiting sleeve (241) detachably mounted at the end of the forearm module (1), the side end of the limiting sleeve (241) away from the forearm module (1) is integrally provided with a pressing sleeve (242), the internal slide of the pressing sleeve (242) is communicated with the internal slide of the limiting sleeve (241), an integrated clamping connecting piece (243) is slidably arranged in the internal slide of the limiting sleeve (241), the side surface of the integrated clamping connecting piece (243) is provided with a rack (244), the internal slide of the pressing sleeve (242) is slidably and abuttingly provided with a tooth block (245), the outer wall of the pressing sleeve (242) is threadedly connected with a lateral key bolt (246), the lateral key bolt (246) is rotatably connected with the tooth block (245), and the tooth block (245) is engaged and locked with the rack (244) when the tooth block (245) moves to the end of the pressing sleeve (242) close to the limiting sleeve (241). The palm module (3) is internally provided with a pressing part (4) for elastically adhering and supporting the palm surface.

2. The external fixation device of claim 1, wherein: The end of the integrated clamping connecting piece (243) is provided with a clamping groove (2431), the clamping groove (2431) is provided with a limiting block (2432), the limiting block (2432) and the integrated clamping connecting piece (243) are fixedly connected through screws, the outer wall of the limiting block (2432) abuts and slidably cooperates with the internal slide of the limiting sleeve (241), and one end of the internal slide of the limiting sleeve (241) is provided with a necked blocking block for limiting the movement range of the integrated clamping connecting piece (243) in the slide.

3. The external fixation device of claim 1, wherein: The forearm module (1) comprises a forearm support upper clamping plate (11) and a forearm support lower clamping plate (12), the forearm support upper clamping plate (11) and the forearm support lower clamping plate (12) are oppositely arranged and the edges thereof are embedded with each other. The palm module (3) comprises a palm plate (31) and a palm back plate (32), the palm plate (31) and the palm back plate (32) are oppositely arranged and the edges thereof are embedded with each other.

4. The external fixation device of claim 3, wherein: The outer sides of the forearm support upper clamping plate (11) and the forearm support lower clamping plate (12) and the outer sides of the palm plate (31) and the palm back plate (32) are all provided with strip-shaped holes corresponding in distribution, and magic tapes are arranged for respectively binding and assembling the forearm module (1) and the palm module (3).

5. The external fixation device of claim 3, wherein: The number of the limiting sleeve (241) is two, and the two limiting sleeves (241) are symmetrically distributed on both sides of the forearm module (1). At least two threaded holes (5) are formed in the side wall of the limiting sleeve (241), and a combination bolt is arranged in the threaded hole (5). The limiting sleeve (241) is installed on the upper forearm support clamping plate (11) or the lower forearm support clamping plate (12) through the combination bolt.

6. The external fixation device of claim 3, wherein: The inner side of the two ends of the upper forearm support clamping plate (11) and the lower forearm support clamping plate (12) is provided with a buffer layer made of medical silica gel.

7. The external fixation device of claim 3, wherein: The movable plate group (23) comprises a limiting hole plate (231) slidably connected to the arc-shaped connecting piece (21). The arc-shaped connecting piece (21) is provided with an arc-shaped sliding rail (232). A plurality of first pin holes (233) are arranged in a linear array on the arc-shaped connecting piece (21) along the track direction of the arc-shaped sliding rail (232). The palm back plate (32) is fixedly provided with a limiting boss (234). The limiting boss (234) is fixedly connected to the limiting hole plate (231) through a screw. The limiting boss (234) slides along the track direction of the arc-shaped sliding rail (232) and is located on the inner side of the arc-shaped sliding rail (232). The limiting hole plate (231) is provided with a second pin hole (235) matched with the first pin hole (233). The second pin hole (235) and the first pin hole (233) in the corresponding position are jointly inserted with a locking pin (236). The limiting hole plate (231) is provided with a pin limiting cover (237) at the top.

8. The external fixation device of claim 7, wherein: The limiting hole plate (231) and the locking pin (236) are made of a magnetic metal material. The pin limiting cover (237) is made of a permanent magnet material. The bottom of the pin limiting cover (237) is provided with a groove (238) for accommodating the locking pin (236).

9. The external fixation device of claim 1, wherein: The flexion and extension locking mechanism (22) comprises a locking matching tooth (221) and a lateral locking tooth (222) matched with the locking matching tooth (221). The arc-shaped connecting piece (21) is provided with a flexion and extension adjusting hole (223) at both ends. The end of the integral occlusion connecting piece (243) is provided with a polygonal hole groove (224). The locking matching tooth (221) and the lateral locking tooth (222) are respectively embedded in the flexion and extension adjusting hole (223) and the polygonal hole groove (224). The lateral locking tooth (222) is embedded with a hexagonal bolt (225) at the shaft center. The hexagonal bolt (225) penetrates the locking matching tooth (221) and is threadedly connected with a hexagonal nut (226). The locking matching tooth (221) and the lateral locking tooth (222) are locked by the hexagonal bolt (225). The outer end surface of the locking matching tooth (221) is provided with an axial limiting ring (227). The end of the axial limiting ring (227) is movably sleeved with the hexagonal nut (226). The hexagonal bolt (225) is sleeved with a spring (228) on the outer side and between the locking matching tooth (221) and the lateral locking tooth (222).

10. The external fixation device of claim 1, wherein: The compression part (4) is a gas bag body. The gas bag body is provided with a charging and discharging hole. A valve core is arranged in the charging and discharging hole. A valve cover is arranged on the outer side of the charging and discharging hole.

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