A rehabilitation brace with adjustable elbow flexion-extension angle

Abstract

The application discloses an elbow joint flexion and extension angle adjustable rehabilitation brace and relates to the field of medical rehabilitation braces. The elbow joint flexion and extension angle adjustable rehabilitation brace comprises an upper arm support and a forearm support, the upper arm support is worn on the upper arm of a patient, the forearm support is worn on the forearm of the patient, further comprises a wearing mechanism, a connecting mechanism and an adjusting mechanism. The brace has the advantages that: the multi-stage rigid locking is realized through the tooth engagement structure, the support angle is prevented from being changed accidentally due to external force, and the rehabilitation safety is ensured; the wearing comfort and the joint activity freedom are improved through the hollow connecting structure and the chamfered edge design; the magic tape bandage can be flexibly adjusted in tightness and is suitable for different patient body types; the fixing bolt is easy to rotate and operate, no additional tools are needed, the patient or medical staff can accurately adjust the angle according to the rehabilitation stage, the problem that the flexion and extension angle of the traditional brace is difficult to flexibly adjust is solved, and the rehabilitation effect and the use convenience are remarkably improved.

Description

Technical Field

[0001] This invention relates to the field of medical rehabilitation braces, specifically to a rehabilitation brace with an adjustable elbow joint flexion and extension angle. Background Technology

[0002] Arm rehabilitation braces are external assistive devices specifically designed for the shoulder, elbow, and wrist joints of the upper limbs in the field of orthopedic rehabilitation. They are an important branch of modern medical orthotics. Based on biomechanical design principles and made of medical materials, they lock the elbow joint and other parts at a safe angle, providing a stable support environment for fractures, ligament injuries, or postoperative wounds, and avoiding secondary damage caused by improper activities. When wearing them during rehabilitation, the upper end should avoid the axillary nerve, and the lower end should be 5 to 10 centimeters away from the wrist bone. The tightness of the straps should be such that one finger can be inserted. They are widely used in scenarios such as upper limb bone and joint injuries, postoperative functional reconstruction, and soft tissue injury rehabilitation. They are a core assistive device that replaces traditional plaster casts and achieves precise, phased rehabilitation.

[0003] Existing arm rehabilitation braces typically involve a fixed connection between the forearm and upper arm to provide support, or a rotating axis that rotates the forearm and upper arm before providing support. This makes it difficult to flexibly adjust the elbow flexion and extension angle according to the patient's rehabilitation progress, thus affecting the patient's arm rehabilitation. Summary of the Invention

[0004] The purpose of this invention is to provide an adjustable elbow joint flexion and extension angle rehabilitation brace to solve the problem that existing arm rehabilitation braces are difficult to adjust and use.

[0005] To achieve the above objectives, the present invention provides the following technical solution: an adjustable elbow joint flexion and extension angle rehabilitation brace, comprising an upper arm support and a forearm support, wherein the upper arm support is worn on the patient's upper arm and the forearm support is worn on the patient's forearm, further comprising: a wearing mechanism disposed on the upper arm support and the forearm support, the wearing mechanism comprising a plurality of Velcro hooks and Velcro straps fixedly disposed on both sides of the sidewalls of the upper arm support and the forearm support, the Velcro hooks and Velcro straps being adhesively disposed together; and a connecting mechanism disposed on the upper arm support and the forearm support, the connecting mechanism comprising: Two connecting frames are fixedly installed at the end of the upper arm support. An adjusting ring is elastically slidably connected inside the connecting frame. Two receiving frames are fixedly installed at the end of the forearm support. The connecting frames and receiving frames are limited to rotate by the adjusting ring. An adjusting mechanism is installed on the connecting frames and receiving frames. The adjusting mechanism includes a fixing bolt screwed onto the connecting frames and receiving frames. A threaded shaft is fixedly installed on the fixing bolt. A limiting tooth is fixedly installed at one end of the adjusting ring. A limiting tooth is fixedly installed on the side wall of the receiving frame. The limiting tooth and the limiting tooth are meshed with each other.

[0006] Furthermore, several hooks and loops are evenly distributed on both sides of the upper arm bracket and the forearm bracket, and the hooks and loops are arranged symmetrically to each other.

[0007] Furthermore, the connecting mechanism also includes a rotating annular groove formed on the side wall of the receiving frame, and the second limiting tooth is located in the rotating annular groove; and one side of the adjusting ring is rotatably limited and disposed in the rotating annular groove.

[0008] Furthermore, the adjustment mechanism also includes a plurality of connecting sliders fixedly disposed on the side wall of the adjustment ring, and springs are fixedly disposed on the connecting sliders; the adjustment ring is elastically slidably disposed within the connecting frame through the plurality of connecting sliders and springs.

[0009] Furthermore, the adjustment mechanism also includes a connecting hole on the adjustment ring, and a threaded hole is provided on the receiving frame inside the rotating ring groove; the threaded shaft on the fixing bolt passes through the connecting hole and is screwed into the threaded hole.

[0010] Furthermore, the adjustment mechanism also includes a limiting ring groove formed on the adjustment ring, and a compression ring block is fixedly provided on the fixing bolt; and the limiting ring groove and the compression ring block are correspondingly provided.

[0011] Furthermore, the diameter of the connecting hole is larger than the diameter of the threaded hole.

[0012] Furthermore, several of the connecting sliders and springs are distributed circumferentially and at equal intervals on the sidewall of the adjusting ring.

[0013] Compared with existing technologies, the present invention provides an adjustable elbow flexion and extension angle rehabilitation brace. The upper arm brace and forearm brace are worn on the patient's upper arm and forearm respectively, and are secured by several sets of symmetrically distributed Velcro hooks and loops. The tightness can be freely adjusted according to wearing comfort to achieve stable fixation. Subsequently, the upper arm brace and forearm brace are adjusted around the elbow joint by rotating the connecting frame and the receiving frame. During adjustment, the threaded shaft on the fixing bolt passes through the adjusting ring and screws into the receiving frame. As the fixing bolt is gradually tightened, its compression pushes the adjusting ring towards the receiving frame, causing the first limiting tooth on the adjusting ring to engage with the second limiting tooth in the rotating ring groove of the receiving frame, thereby locking the current angle. After loosening the fixing bolt, the adjusting ring resets under the elastic action of the connecting slider and spring, the locking teeth disengage, and the angle can be adjusted again. The advantages of this brace are: multi-level rigid locking through a locking tooth structure to prevent unexpected changes in the support angle caused by external forces, ensuring rehabilitation safety; the hollow connection structure and chamfered edge design improve wearing comfort and joint mobility; the Velcro straps can be flexibly adjusted to adapt to different patient body types; the fixing plug is easy to operate without additional tools, allowing patients or medical staff to make precise adjustments at different angles according to the rehabilitation stage, effectively solving the problem of traditional braces having difficulty in flexibly adjusting flexion and extension angles, and significantly improving rehabilitation effects and ease of use. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0015] Figure 1 This is a schematic diagram of the overall structure of the rehabilitation brace provided in an embodiment of the present invention;

[0016] Figure 2 This is a schematic diagram of the connection structure between the upper arm support and the forearm support provided in an embodiment of the present invention;

[0017] Figure 3 This is a schematic diagram of the disassembled structure of the connecting frame and the receiving frame provided in an embodiment of the present invention;

[0018] Figure 4 Provided for embodiments of the present invention Figure 3 Schematic diagram of the structure at point A in the middle;

[0019] Figure 5 Provided for embodiments of the present invention Figure 3Schematic diagram of the structure at point B;

[0020] Figure 6 This is a schematic diagram of the adjusting ring connection structure provided in an embodiment of the present invention;

[0021] Figure 7 This is a schematic diagram of the fixing bolt connection structure provided in an embodiment of the present invention.

[0022] Explanation of reference numerals in the attached figures:

[0023] 1. Upper arm support; 2. Forearm support; 3. Velcro hook; 4. Velcro strap; 5. Connecting bracket; 6. Support bracket; 7. Fixing bolt; 8. Adjusting ring; 9. Limiting ring groove; 10. Connecting hole; 11. Limiting tooth one; 12. Threaded hole; 13. Rotating ring groove; 14. Limiting tooth two; 15. Connecting slider; 16. Spring; 17. Compression ring block; 18. Threaded shaft. Detailed Implementation

[0024] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0025] As attached Figure 1 To be continued Figure 7 As shown:

[0026] Example 1:

[0027] This invention provides an adjustable elbow flexion and extension angle rehabilitation brace, including an upper arm support 1 and a forearm support 2. The upper arm support 1 is worn on the patient's upper arm, and the forearm support 2 is worn on the patient's forearm. It further includes: a wearing mechanism disposed on the upper arm support 1 and the forearm support 2, the wearing mechanism comprising a plurality of Velcro hooks 3 and Velcro straps 4 fixedly disposed on both sides of the sidewalls of the upper arm support 1 and the forearm support 2, the Velcro hooks 3 and Velcro straps 4 being adhesively connected to each other; and a connecting mechanism disposed on the upper arm support 1 and the forearm support 2, the connecting mechanism comprising a fixedly disposed on the upper arm support 1... Two connecting frames 5 at the ends, with an adjusting ring 8 elastically slidably connected inside the connecting frame 5; two receiving frames 6 are fixedly installed at the ends of the forearm bracket 2; the connecting frame 5 and the receiving frame 6 are limited to rotate by the adjusting ring 8; an adjusting mechanism is installed on the connecting frame 5 and the receiving frame 6; the adjusting mechanism includes a fixing bolt 7 screwed onto the connecting frame 5 and the receiving frame 6; a threaded shaft 18 is fixedly installed on the fixing bolt 7; a limiting tooth 11 is fixedly installed at one end of the adjusting ring 8; a limiting tooth 24 is fixedly installed on the side wall of the receiving frame 6; and the limiting tooth 11 and the limiting tooth 24 are meshed with each other.

[0028] Simultaneously, by wearing the upper arm support 1 and the forearm support 2 on the patient's upper arm and forearm respectively, and by attaching them together with several sets of symmetrically distributed Velcro hooks 3 and Velcro straps 4, the tightness can be freely adjusted according to wearing comfort to achieve stable fixation. Subsequently, through the rotational cooperation of the connecting frame 5 and the receiving frame 6, the flexion and extension angles of the upper arm support 1 and the forearm support 2 around the elbow joint can be adjusted. During adjustment, the threaded shaft 18 on the fixing bolt 7 passes through the connecting hole 10 of the adjusting ring 8 and is screwed into the threaded hole 12 of the receiving frame 6. As the fixing bolt 7 is gradually tightened, its squeezing ring block 17 pushes the adjusting ring 8 to move towards the receiving frame 6, so that the limiting tooth 11 on the adjusting ring 8 and the limiting tooth 14 in the rotating ring groove 13 of the receiving frame 6 mesh with each other, thereby locking the current angle. After loosening the fixing bolt 7, the adjusting ring 8 is reset under the elastic action of the connecting slider 15 and the spring 16, the limiting tooth disengages, and the angle can be adjusted again. The advantages of this brace are: multi-level rigid locking is achieved through a limiting tooth meshing structure, which avoids unexpected changes in the support angle caused by external forces and ensures rehabilitation safety; the hollow connection structure and chamfered edge design improve wearing comfort and joint mobility; the Velcro straps can be flexibly adjusted to adapt to different patient body types; the fixing plug 7 is easy to screw on and requires no additional tools, making it convenient for patients or medical staff to make precise adjustments at different angles according to the rehabilitation stage, effectively solving the problem of traditional braces having difficulty in flexibly adjusting flexion and extension angles, and significantly improving rehabilitation effects and ease of use.

[0029] refer to Figure 1 and Figure 2 The wearing mechanism includes an upper arm support 1, a forearm support 2, a Velcro strap 3, and a Velcro strap 4;

[0030] By incorporating an upper arm support 1 and a forearm support 2, and designing the upper arm support 1 and forearm support 2 to be semi-cylindrical, the system facilitates easy placement of the upper arm support 1 on the patient's upper arm and the forearm support 2 on the patient's forearm when the patient needs to fix and rehabilitate their arm. The sides and ends of the upper arm support 1 and forearm support 2 are chamfered to ensure smooth edges, thereby improving the ease and comfort of wearing them. Furthermore, holes can be drilled in the upper arm support 1 and forearm support 2 to prevent stuffiness during use.

[0031] Meanwhile, several Velcro hooks 3 and Velcro straps 4 are installed on both sides of the side walls of the upper arm support 1 and the forearm support 2, respectively. These Velcro hooks 3 and Velcro straps 4 are equidistantly distributed on both sides of the side walls of the upper arm support 1 and the forearm support 2, and are symmetrically installed. This allows the upper arm support 1 and the forearm support 2 to be stably worn on the patient's upper arm and forearm after being worn on their respective arms and forearms, and to be securely fastened together by the Velcro hooks 3 and Velcro straps 4. The tightness of the Velcro hooks 3 and Velcro straps 4 can be freely adjusted according to wearing needs, thus facilitating stable wear and improving wearing comfort.

[0032] Example 2:

[0033] refer to Figure 3 , Figure 4 and Figure 5 The connecting mechanism includes a connecting frame 5, a receiving frame 6, an adjusting ring 8, and a rotating ring groove 13;

[0034] By fixing two connecting frames 5 to one end of the upper arm support 1 and two receiving frames 6 to one end of the forearm support 2, the upper arm support 1 and the forearm support 2 can be rotatably connected through the two connecting frames 5 and the receiving frames 6 before wearing and use. This facilitates the adjustment of the flexion and extension angle of the elbow joint through the connecting frames 5 and the receiving frames 6 after the upper arm support 1 and the forearm support 2 are worn on the patient's upper arm and forearm. Furthermore, the connection between the two connecting frames 5 and the receiving frames 6, as well as the connection between the upper arm support 1 and the forearm support 2, is designed with a hollow structure, so that the elbow joint is not obstructed by the connecting frames 5 and the receiving frames 6, or by the upper arm support 1 and the forearm support 2 when adjusting the flexion and extension angle, thereby improving the freedom of elbow joint flexion and extension adjustment.

[0035] Meanwhile, both connecting frames 5 are elastically slidably connected to adjusting rings 8, and one end of adjusting ring 8 protrudes inward toward the connecting frame 5 when not subjected to external force. Rotating ring grooves 13 are provided on the side walls of both receiving frames 6, so that when the connecting frame 5 and the receiving frame 6 are rotated, the part of adjusting ring 8 protruding inward toward the connecting frame 5 can be engaged in the rotating ring groove 13. This facilitates the limiting rotational connection between the connecting frame 5 and the receiving frame 6 through adjusting ring 8 and rotating ring groove 13, thereby facilitating the adjustment of elbow flexion and extension angles when the upper arm support 1 and forearm support 2 are worn on the patient's arm through the connecting frame 5 and the receiving frame 6.

[0036] Example 3:

[0037] refer to Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7 The adjustment mechanism includes a connecting slider 15, a spring 16, a first limiting tooth 11, a second limiting tooth 14, a fixing bolt 7, a threaded shaft 18, and a compression ring block 17.

[0038] By fixing several connecting sliders 15 to the side wall of the adjusting ring 8, and fixing several springs 16 to the connecting sliders 15, the adjusting ring 8 can be easily and elastically slidably connected to the inside of the connecting frame 5 through the connecting sliders 15 and springs 16. The connecting sliders 15 and springs 16 are arranged in a ring and evenly spaced on the side wall of the adjusting ring 8, ensuring stable sliding adjustment of the adjusting ring 8 inside the connecting frame 5. A limit tooth 11 is fixedly connected to one end of the adjusting ring 8, and a retaining ring groove 13 is fixed inside the groove. The fixed connection has a limiting tooth 14, so that when the adjusting ring 8 is not subjected to external force, and one end of the adjusting ring 8 is limited to the rotating ring groove 13, the limiting tooth 11 and the limiting tooth 14 do not contact or restrict each other. When the adjusting ring 8 is squeezed by external force, the limiting tooth 11 will mesh with the limiting tooth 14, thereby achieving the purpose of locking the adjusting ring 8 in the rotating ring groove 13, so as to fix the rotation angle of the connecting frame 5, the supporting frame 6, the upper arm support 1, and the forearm support 2, thereby providing fixed support for the patient's arm.

[0039] Meanwhile, a connecting hole 10 is provided inside the adjusting ring 8, and a threaded hole 12 is provided on the receiving frame 6 inside the rotating ring groove 13. The diameter of the connecting hole 10 is larger than the diameter of the threaded hole 12, so that when the fixing bolt 7 is in use, the threaded shaft 18 fixedly connected to the compression ring block 17 can pass through the interior of the connecting hole 10 and be screwed into the threaded hole 12. A limit ring groove 9 is provided at the other end of the adjusting ring 8, and a compression ring block 17 is also fixedly connected to the fixing bolt 7, thereby making the fixing bolt... 7. When screwing and tightening, the compression ring block 17 on the fixing bolt 7 will be limited and squeezed in the limiting ring groove 9. When the fixing bolt 7 is continuously tightened through the threaded shaft 18 and the threaded hole 12, the compression ring block 17 on the fixing bolt 7 will push the adjusting ring 8 to squeeze the support frame 6 until the limiting tooth 11 and the limiting tooth 2 14 squeeze and mesh with each other. This makes it easy to screw and tighten the connecting frame 5 and the support frame 6 through the two fixing bolts 7, thereby achieving the purpose of fixing the support angle of the upper arm bracket 1 and the forearm bracket 2.

[0040] Secondly, when the fixing bolt 7 is tightened to its tightest position, the end of the threaded shaft 18 is still located inside the threaded hole 12, thus preventing the end of the threaded shaft 18 from protruding into the threaded hole 12 and causing friction to the patient's elbow joint on the inner side of the support frame 6. In addition, when the connecting slider 15 slides within the connecting frame 5, there is a certain gap between the connecting slider 15 and the inner slide, allowing the adjusting ring 8 to deflect slightly at a certain angle through the gap between the connecting slider 15 and the slide within the connecting frame 5. This avoids the situation where the limiting tooth 11 and the limiting tooth 2 14 cannot mesh. Furthermore, the meshing structure between the limiting tooth 11 and the limiting tooth 2 14 ensures that after the use angle of the upper arm support 1 and the forearm support 2 is fixed, it cannot be easily deflected by external force, thus avoiding the problem of the support angle changing due to the inability to lock the upper arm support 1 and the forearm support 2.

[0041] Working principle: First, the wearing procedure is performed. The upper arm support 1 is attached to the outside of the patient's upper arm, and the forearm support 2 is attached to the outside of the forearm. The elbow joint is naturally aligned with the hollow area between the connecting frame 5 and the receiving frame 6. Then, the multiple Velcro hooks 3 located on both sides of the upper arm support 1 and the forearm support 2 are attached to the corresponding Velcro straps 4. The attachment position is adjusted appropriately according to the thickness of the patient's limbs to ensure that it is firmly fixed without affecting blood circulation. This completes the initial wearing procedure. Before adjusting the flexion-extension angle, the current locking state must be released: loosen the fixing bolt 7 counterclockwise by hand, so that the threaded shaft 18 on the fixing bolt 7 partially unscrews from the threaded hole 12 of the support frame 6. At the same time, the compression ring block 17 on the fixing bolt 7 gradually disengages from the compression of the upper limit ring groove 9 of the adjusting ring 8. At this time, under the elastic reset action of the spring 16 sleeved on the connecting slider 15, the adjusting ring 8 will slide back into the connecting frame 5, so that the limiting tooth 11 at the end of the adjusting ring 8 disengages from the limiting tooth 14 in the rotating ring groove 13 of the support frame 6. However, the adjusting ring 8 is still partially embedded in the rotating ring groove 13, so that the connecting frame 5 and the support frame 6 can only rotate relative to each other without separating. Next, according to the range of motion of the elbow joint required by the patient in the rehabilitation stage, slowly rotate the forearm support 2 by hand, so that it swings relative to the upper arm support 1 around the rotation axis of the connecting frame 5 and the support frame 6 to the target flexion-extension angle. Since the connecting frame 5 and the support frame 6 have a hollow structure, the rotation process will not interfere with the elbow joint. After the angle is determined, the locking operation is performed: Tighten the fixing bolt 7 clockwise. The threaded shaft 18 passes through the larger diameter connecting hole 10 on the adjusting ring 8 and is screwed back into the threaded hole 12. As the fixing bolt 7 gradually tightens, the compression ring block 17 presses against the limiting ring groove 9 of the adjusting ring 8, pushing the adjusting ring 8 against the elastic force of the spring 16 towards the support frame 6 until the limiting tooth 11 and the limiting tooth 14 are fully engaged. At the same time, the adjusting ring 8 is tightly pressed into the rotating ring groove 13, thus achieving rigid locking of the angle between the connecting frame 5 and the support frame 6. At this time, the relative positions of the upper arm support 1 and the forearm support 2 are fixed, providing stable support for the patient's arm. If the angle needs to be changed during subsequent rehabilitation, simply loosen the fixing bolt 7 counterclockwise again. The spring 16 automatically pushes the adjusting ring 8 back to its original position, disengaging the limiting teeth. The above rotation and locking steps can then be repeated, achieving multi-level and stepless flexible adjustment. Throughout the entire process, the loosening and tightening of the fixing bolt 7 requires no additional tools, and the end of the threaded shaft 18 is always inside the threaded hole 12 when fully tightened, so it will not protrude and scratch the elbow skin; at the same time, a small gap is reserved between the connecting slider 15 and the internal slide of the connecting bracket 5, allowing the adjusting ring 8 to deflect slightly before engagement, ensuring that the first limiting tooth 11 and the second limiting tooth 14 can be accurately aligned and engaged, avoiding jamming, thereby ensuring the smoothness of the adjustment process and the reliability of locking.

[0042] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A rehabilitation brace with adjustable elbow flexion and extension angles, comprising an upper arm brace (1) and a forearm brace (2), wherein the upper arm brace (1) is worn on the patient's upper arm and the forearm brace (2) is worn on the patient's forearm, characterized in that, Also includes: Wearing mechanism, provided on the upper arm support (1) and the forearm support (2), the wearing mechanism includes a plurality of Velcro hooks (3) and Velcro straps (4) fixedly provided on both sides of the side wall of the upper arm support (1) and the forearm support (2), the Velcro hooks (3) and the Velcro straps (4) are attached to each other; A connecting mechanism is provided on the upper arm support (1) and the forearm support (2). The connecting mechanism includes two connecting frames (5) fixedly provided at the end of the upper arm support (1). An adjusting ring (8) is elastically slidably connected in the connecting frame (5). Two receiving frames (6) are fixedly provided at the end of the forearm support (2). The connecting frame (5) and the receiving frame (6) are limited to rotate through the adjusting ring (8). An adjustment mechanism is provided on the connecting frame (5) and the receiving frame (6). The adjustment mechanism includes a fixing bolt (7) screwed onto the connecting frame (5) and the receiving frame (6). A threaded shaft (18) is fixedly provided on the fixing bolt (7). A limiting tooth one (11) is fixedly provided at one end of the adjustment ring (8). A limiting tooth two (14) is fixedly provided on the side wall of the receiving frame (6). The limiting tooth one (11) and the limiting tooth two (14) are meshed with each other.

2. The adjustable elbow joint flexion and extension angle rehabilitation brace according to claim 1, characterized in that, Several hook and loop fasteners (3) and hook and loop fasteners (4) are distributed at equal intervals on both sides of the sidewalls of the upper arm support (1) and the forearm support (2), and the hook and loop fasteners (3) and hook and loop fasteners (4) are arranged symmetrically to each other.

3. The adjustable elbow joint flexion and extension angle rehabilitation brace according to claim 1, characterized in that, The connecting mechanism also includes a rotating annular groove (13) formed on the side wall of the receiving frame (6), and the limiting tooth (14) is located in the rotating annular groove (13); Furthermore, one end of the adjusting ring (8) is rotatably positioned within the rotating ring groove (13).

4. The adjustable elbow joint flexion and extension angle rehabilitation brace according to claim 1, characterized in that, The adjustment mechanism also includes a number of connecting sliders (15) fixedly disposed on the side wall of the adjustment ring (8), and springs (16) are fixedly disposed on the connecting sliders (15). The adjusting ring (8) is elastically slidably disposed within the connecting frame (5) by a plurality of connecting sliders (15) and springs (16).

5. The adjustable elbow joint flexion-extension angle rehabilitation brace according to claim 3, characterized in that, The adjustment mechanism also includes a connecting hole (10) on the adjustment ring (8), and a threaded hole (12) is provided on the receiving frame (6) inside the rotating ring groove (13). The threaded shaft (18) on the fixing bolt (7) passes through the interior of the connecting hole (10) and is engaged with the threaded hole (12).

6. The adjustable elbow joint flexion-extension rehabilitation brace according to claim 5, characterized in that, The adjustment mechanism also includes a limiting ring groove (9) opened on the adjustment ring (8), and a compression ring block (17) is fixedly provided on the fixing bolt (7). The limiting ring groove (9) and the extrusion ring block (17) are respectively provided.

7. The adjustable elbow joint flexion-extension rehabilitation brace according to claim 5, characterized in that, The diameter of the connecting hole (10) is larger than the diameter of the threaded hole (12).

8. The adjustable elbow joint flexion and extension angle rehabilitation brace according to claim 4, characterized in that, Several connecting sliders (15) and springs (16) are distributed circumferentially and at equal intervals on the side wall of the adjusting ring (8).

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