Dynamic-static multi-mode extension brace for post-traumatic elbow stiffness

Abstract

The application relates to a dynamic and static multi-mode stretching brace for post-traumatic elbow joint stiffness, which comprises a mode converter and an arm moving frame, the mode converter is provided with a mode conversion knob, the mode conversion knob is connected with a gear shaft, the gear shaft is connected with a guide shaft through a first bearing and a second bearing, the rear end of the guide shaft is connected with a rear cover, the front end of the guide shaft is connected with a training knob, the training knob is connected with a front cover; the middle part of the gear shaft is connected with a gear through a gear connecting piece, the gear is provided with a gasket, and the two ends of the gasket are respectively provided with a small-arm rotating gear and a large-arm rotating gear; the arm moving frame comprises a small-arm moving frame A and a large-arm moving frame B. The application has three modes of static brace, static fixation and dynamic brace, can better meet the rehabilitation needs of different patients, the U-shaped sliding blocks on the small-arm moving frame and the large-arm moving frame can be adjusted to make the users wear more comfortably, and users with different arm sizes can better use the application.

Description

Technical Field

[0001] This invention belongs to the field of elbow joint rehabilitation training braces technology, and relates to a dynamic and static multi-mode traction brace for post-traumatic elbow joint stiffness. Background Technology

[0002] As the positioning joint of the forearm and hand, the elbow joint's range of motion has become increasingly important with the significant changes in modern life and work. Controlling driving, engaging in sports, eating and dressing, and using computers and mobile phones all rely on the flexible elbow joint. During normal gait, the periodic swinging of the elbow joint also plays a crucial role in maintaining body stability and balance.

[0003] With the rapid development of the construction and transportation industries, complex elbow fractures and dislocations caused by workplace injuries and traffic accidents are on the rise. Complex elbow fractures and dislocations lead to damage to both bony and soft tissue structures, potentially causing elbow instability and functional impairment. Elbow stiffness is a common complication following elbow injury, with an incidence rate as high as 12%. Studies have shown that a 50% reduction in elbow range of motion can decrease upper limb function by 80%, even affecting gait stability. The occurrence and progression of elbow stiffness will limit a patient's abilities and may even lead to loss of work capacity.

[0004] The main pathological basis of post-traumatic elbow stiffness is contracture of the joint capsule and surrounding soft tissues. Patients with post-traumatic elbow stiffness can undergo rehabilitation training using a brace to apply continuous stretching force to the contracted tissues. By utilizing the viscoelasticity of the soft tissues, this can alter their length and increase joint range of motion.

[0005] Currently, common rehabilitation braces include dynamic stretching splints, static stretching braces, continuous passive trainers, and static progressive stretching braces. These rehabilitation braces have a good effect on the rehabilitation of patients. However, they only have one type of brace mode, either dynamic or static. At the same time, the arm fixation devices of these braces cannot be adjusted, which cannot meet the rehabilitation needs of different patients. Summary of the Invention

[0006] The purpose of this invention is to overcome the shortcomings of the prior art and provide a dynamic and static multi-mode traction brace for post-traumatic elbow joint stiffness, which can realize three modes: dynamic brace, static brace, and static fixation, and can achieve both constant displacement and constant traction force.

[0007] The technical problem solved by this invention is achieved through the following technical solution:

[0008] A dynamic and static multi-mode stretching brace for post-traumatic elbow stiffness, characterized in that: it includes a mode converter and an arm movement frame connected to the mode converter; the mode converter is provided with a mode conversion knob, the mode conversion knob is connected to a gear shaft, the gear shaft is provided with a first bearing and a second bearing at both ends, the outer sides of the first bearing and the second bearing are respectively connected to a guide shaft, the rear end of the guide shaft is connected to a rear cover, the front end of the guide shaft is connected to a training knob, the training knob is connected to a front cover; a gear connector is provided in the middle of the gear shaft, the gear shaft is connected to a gear through the gear connector, the gear is provided with a washer, and the two ends of the washer are respectively provided with a forearm rotation gear and an upper arm rotation gear;

[0009] The arm movement frame includes a forearm movement frame A and an upper arm movement frame B. Both the forearm movement frame A and the upper arm movement frame B include U-shaped sliders, fixed rods, and fixed straps. The fixed rod of the forearm movement frame A is fixedly connected to the forearm rotating gear, and the fixed rod of the upper arm movement frame B is fixedly connected to the upper arm rotating gear. Two U-shaped sliders are spaced apart on the fixed rod, and the ends of the U-shaped sliders are connected to the fixed straps. Spring fixing blocks are provided at both ends of the forearm rotating gear and the upper arm rotating gear, and springs are connected between the spring fixing blocks of the forearm rotating gear and the upper arm rotating gear.

[0010] Furthermore, the connection between the training knob and the front cover, and between the gasket and the forearm rotating gear and the upper arm rotating gear, all adopt mortise and tenon structure.

[0011] Furthermore, the mode conversion knob has through holes at both ends of its side and at the front end of the gear shaft. The mode conversion knob and the gear shaft are connected by pins inserted into the through holes. The training knob has two circular through holes, the guide shaft has two circular through holes, and the rear cover has two threaded holes. Two long bolts pass through the circular through holes of the training knob and the guide shaft and are screwed into the threaded holes on the rear cover to fix the mode converter. The training knob drives the guide shaft to rotate, the guide shaft rotates, the mode conversion knob rotates, the gear shaft rotates, and the gear moves horizontally. When the gear moves to a position where it is not engaged with either the forearm rotating gear or the upper arm rotating gear, it is in dynamic support mode. When the gear moves to a position where it is engaged with the forearm rotating gear, it is in static support mode. When the gear moves to a position where it is engaged with both the forearm rotating gear and the upper arm rotating gear, it is in stationary fixed mode.

[0012] Moreover, the front end of the gear shaft is cylindrical with a thread in the middle, and the rear end is cylindrical, with the threaded section in the middle meshing with the gear connector.

[0013] Furthermore, the gear connector has a thread on its inner side and two keyways on its outer side. The gear has two keyways, and the key is inserted into the keyways of the gear connector and the gear to connect the gear connector and the gear.

[0014] Furthermore, the guide shaft is provided with two long keyways and two cuboid protrusions. The long keyways limit the horizontal displacement distance of the gear. The gear is provided with two grooves. The cuboid protrusions on the guide shaft cooperate with the grooves on the gear to restrict the rotation of the gear and realize the horizontal movement of the gear.

[0015] Furthermore, the front end of the fixing rod is provided with two circular through holes, and the ends of the forearm rotating gear and the upper arm rotating gear are integrally formed with a cuboid plate. The cuboid plate is provided with two circular through holes, and the fixing rod is fixed to the forearm rotating gear and the upper arm rotating gear respectively by bolts and nuts passing through the circular through holes.

[0016] Furthermore, the front middle section of the fixing rod is provided with an upwardly inclined plane, and the rear section of the fixing rod is provided with a rectangular through hole.

[0017] Furthermore, the U-shaped slider is slidably mounted on the fixed rod and fixed to the fixed rod by small bolts; the end of the U-shaped slider is provided with two rectangular grooves, and the fixing strap is fixed in the rectangular grooves. The fixing strap is a thickened nylon strap, which is wrapped around the forearm and upper arm by Velcro.

[0018] Furthermore, the traction brace has three modes: static brace, static fixed brace, and dynamic brace.

[0019] (a) Static brace mode: After adjusting the U-shaped slider to a comfortable position for the patient, fix the patient's forearm to the forearm frame A with a fixing strap, and fix the patient's upper arm to the upper arm frame B with a fixing strap. Rotate the mode conversion knob to move the gear to the position that meshes with the forearm rotation gear, adjust the rehabilitation brace to the static brace mode, and then rotate the training knob to drive the forearm frame A to rotate, thereby applying force to the elbow joint to complete the rehabilitation training;

[0020] (b) Static fixation mode: After the U-shaped slider is adjusted to a comfortable position for the patient, the patient's forearm is fixed to the forearm movement frame A with a fixation strap, and the patient's upper arm is fixed to the upper arm movement frame B with a fixation strap. When the elbow joint moves to the appropriate position, rotate the mode conversion knob to move the gear to the position where it meshes with the forearm rotation gear and the upper arm rotation gear at the same time, adjust the rehabilitation brace to the static fixation mode, fix the position of the elbow joint support, and thus fix the position of the elbow joint.

[0021] (c) Dynamic brace mode: After adjusting the U-shaped slider to a comfortable position for the patient, fix the patient's forearm to the forearm frame A with a fixing strap, and fix the patient's upper arm to the upper arm frame B with a fixing strap. Rotate the mode conversion knob to move the gear to a position that is not engaged with the forearm rotation gear and the upper arm rotation gear, and adjust the rehabilitation brace to dynamic brace mode. The user completes the rehabilitation training by applying force to the elbow joint through the spring.

[0022] The advantages and beneficial effects of this invention are as follows:

[0023] The present invention provides a multi-mode dynamic and static traction brace for post-traumatic elbow stiffness, which has three modes: static brace, static fixation, and dynamic brace, to better meet the rehabilitation needs of different patients. The U-shaped sliders on the forearm and upper arm movement frames are adjustable to make the user more comfortable to wear and also to make it easier for users with different arm sizes to use. Attached Figure Description

[0024] Figure 1 Here is a schematic diagram of the structure of the present invention:

[0025] Figure 2 Here is a schematic diagram of the exploded structure of the present invention:

[0026] Figure 3 Here is a schematic diagram of the mode converter of the present invention:

[0027] Figure 4 This is a schematic diagram of the structure of the movable arm frame of the present invention:

[0028] Figure 5 This is a schematic diagram of the gear position in the static support mode of the present invention:

[0029] Figure 6 This is a schematic diagram of the gear position in the static fixed mode of the present invention:

[0030] Figure 7 This is a schematic diagram of the gear position in the dynamic support mode of the present invention;

[0031] Figure 8 This is a schematic diagram of the spring connection between the forearm rotating gear and the upper arm rotating gear of the present invention.

[0032] Explanation of reference numerals in the attached figures

[0033] Mode converter 1, mode conversion knob 1-1, training knob 1-2, front cover 1-3, forearm rotation gear 1-4, upper arm rotation gear 1-5, first bearing 1-6, gear connector 1-7, gear shaft 1-8, second bearing 1-9, gear 1-10, gasket 1-11, guide shaft 1-12, rear cover 1-13, key 1-14, long bolt 1-15, pin 1-16;

[0034] 2. Arm movable frame, 2-1. U-shaped slider, 2-2. Fixing rod, 2-3. Fixing strap, 2-4. Small bolt, 2-5. Bolt and nut, 2-6. Spring fixing block, 2-7. Spring. Detailed Implementation

[0035] The present invention will be further described in detail below through specific embodiments. The following embodiments are merely descriptive and not limiting, and should not be used to limit the scope of protection of the present invention.

[0036] The structure of the dynamic and static multimodal traction brace for post-traumatic elbow stiffness of the present invention is as follows: Figures 1-8 As shown, it includes a mode converter 1 and an arm movement frame 2 connected to the mode converter 1.

[0037] The mode converter 1 is equipped with a mode conversion knob 1-1. The rear end of the mode conversion knob 1-1 is connected to the gear shaft 1-8. One end of the gear shaft 1-8 is equipped with a first bearing 1-6, and the other end is equipped with a second bearing 1-9. The outer sides of the first bearing 1-6 and the second bearing 1-9 are simultaneously engaged with the guide shaft 1-12. One end of the guide shaft 1-12 is connected to the rear cover 1-13, and the other end is connected to the training knob 1-2. The training knob 1-2 is connected to the front cover 1-3. A gear connector 1-7 is provided in the middle of the gear shaft 1-8. The gear connector 1-7 connects the gear shaft 1-8 and the gear 1-10 together. The gear 1-10 is equipped with a shim 1-11. The shim 1-11 is between the forearm rotating gear 1-4 and the upper arm rotating gear 1-5, connecting the forearm rotating gear 1-4 and the upper arm rotating gear 1-5. The shim 1-11 can prevent interference when the forearm rotating gear 1-4 and the upper arm rotating gear 1-5 rotate.

[0038] The arm movement frame 2 includes a forearm movement frame A and an upper arm movement frame B. The forearm movement frame A is equipped with a forearm rotating gear 1-4, which has a spring fixing block 2-6. The forearm rotating gear 1-4 is connected to a fixing rod 2-2, which is connected to two U-shaped sliders 2-1. The U-shaped sliders 2-1 are connected to a fixing strap 2-3. The upper arm movement frame B has the same structure as the forearm movement frame A.

[0039] In this invention, the connection between the training knob 1-2 and the front cover 1-3, and the connection between the gasket 1-11 and the forearm rotating gear 1-4 and the upper arm rotating gear 1-5, all adopt mortise and tenon structure, making the connection between the components tighter.

[0040] In this invention, the mode conversion knob 1-1 has two circular through holes on its outer side; the gear shaft 1-8 has a circular through hole at its front end, and a pin 1-16 is inserted into the through hole to connect the mode conversion knob 1-1 and the gear shaft 1-8; the rotation of the mode conversion knob 1-1 drives the gear shaft 1-8 to rotate, and the rotation of the gear shaft 1-8 drives the gear 1-10 to move horizontally. When the gear 1-10 moves to a position where it is not engaged with either the forearm rotating gear 1-4 or the upper arm rotating gear 1-5, it is in dynamic support mode; when the gear 1-10 moves to a position where it is engaged with the forearm rotating gear 1-4, it is in static support mode; when the gear 1-10 moves to a position where it is engaged with both the forearm rotating gear 1-4 and the upper arm rotating gear 1-5, it is in static fixed mode.

[0041] In this invention, the training knob 1-2 has two circular through holes; the guide shaft 1-12 has two circular through holes; the rear cover 1-13 has two threaded holes, and two long bolts 1-15 pass through the circular through holes of the training knob 1-2 and the guide shaft 1-12, and are screwed into the threaded holes on the rear cover to fix the entire mode converter 1; the training knob 1-2 drives the guide shaft 1-12 to rotate, and the rotation of the guide shaft 1-12 drives the gear 1-10 to rotate. When the gear 1-10 meshes with the forearm rotating gear 1-4, the rotation of the gear 1-10 drives the forearm movable frame A to rotate, thereby performing elbow joint rehabilitation training.

[0042] In this invention, the front end of the gear shaft 1-8 is cylindrical with a thread in the middle, and the rear end is cylindrical. The thread in the middle meshes with the gear connector 1-7.

[0043] In this invention, the gear connector 1-7 has a thread on its inner side and two keyways on its outer side; the gear 1-10 has two keyways, and key 1-14 is inserted into the keyways of the gear connector 1-7 and the gear 1-10 to connect the gear connector 1-7 and the gear 1-10.

[0044] In this invention, the guide shaft 1-12 is provided with two long keyways and two cuboid protrusions. The long keyways limit the horizontal displacement distance of the gear. The gear 1-10 is provided with two grooves. The cuboid protrusions on the guide shaft 1-12 cooperate with the grooves on the gear to restrict the rotation of the gear 1-10, thereby realizing the horizontal movement of the gear 1-10.

[0045] In this invention, the forearm rotating gear 1-4 and the upper arm rotating gear 1-5 have teeth on their inner sides and protrude from a cuboid plate on their outer sides. The cuboid plate has two circular through holes, which are connected to the fixing rod 2-2 by bolts and nuts 2-5. Two fixing spring blocks 2-6 are provided on both sides of the cuboid plate. A spring 2-7 is connected between the spring fixing blocks 2-6 of the forearm rotating gear 1-4 and the upper arm rotating gear 1-5. The upper and lower springs apply force to the elbow joint to perform elbow joint rehabilitation training.

[0046] In this invention, the front end of the fixing rod 2-2 is provided with two circular through holes, which are connected to the forearm rotating gear 1-4 and the upper arm rotating gear 1-5 by bolts and nuts 2-5; the front middle end of the fixing rod 2-2 is provided with an upwardly sloping plane, so that the fixing rod 2-2 fits the arm better; a rectangular through hole is opened in the rear half of the fixing rod 2-2 to reduce the weight of the fixing rod 2-2.

[0047] In this invention, the U-shaped slider 2-1 has a rectangular through hole at its front end for connecting to the fixing rod 2-2 and sliding on the fixing rod 2-2 to adjust the position of the fixed arm, making it more comfortable for the patient to wear; the rectangular through hole of the U-shaped slider 2-1 has two threaded holes on its two sides, and the U-shaped slider can be fixed in the adjusted position by tightening the small bolts 2-4; the end of the U-shaped slider 2-1 has two rectangular grooves for fixing the strap.

[0048] In this invention, the fixing straps 2-3 are thickened nylon straps, which are wrapped around the forearm and upper arm with Velcro.

[0049] The present invention provides a multi-modal traction brace for post-traumatic elbow stiffness, comprising three modes: static brace, static fixation, and dynamic brace.

[0050] 1. Static brace mode: After adjusting the U-shaped slider 2-1 to a comfortable position for the patient, fix the patient's forearm to the forearm frame A with the fixing strap 2-3, and fix the patient's upper arm to the upper arm frame B with the fixing strap 2-3. Rotate the mode conversion knob 1-1 to move the gear 1-10 to the position of meshing with the forearm rotation gear 1-4, adjust the rehabilitation brace to static brace mode, and then rotate the training knob 1-2 to drive the forearm frame A to rotate, thereby applying force to the elbow joint to complete the rehabilitation training.

[0051] 2. Static Fixation Mode: After adjusting the U-shaped slider 2-1 to a comfortable position for the patient, fix the patient's forearm to the forearm movement frame A with the fixation strap 2-3, and fix the patient's upper arm to the upper arm movement frame B with the fixation strap 2-3. When the elbow joint moves to the appropriate position, rotate the mode conversion knob 1-1 to move the gear 1-10 to the position where it meshes with the forearm rotation gear 1-4 and the upper arm rotation gear 1-4 simultaneously, adjusting the rehabilitation brace to the static fixation mode, fixing the position of the elbow joint support, and thus fixing the elbow joint position.

[0052] 3. Dynamic brace mode: After adjusting the U-shaped slider 2-1 to a comfortable position for the patient, fix the patient's forearm to the forearm frame A with the fixing strap 2-3, and fix the patient's upper arm to the upper arm frame B with the fixing strap 2-3. Rotate the mode conversion knob 1-1 to move the gear 1-10 to a position where it is not engaged with the forearm rotation gear 1-4 and the upper arm rotation gear 1-5, thus adjusting the rehabilitation brace to dynamic brace mode. The user completes rehabilitation training by applying force to the elbow joint through the spring.

[0053] Although embodiments and drawings of the present invention have been disclosed for illustrative purposes, those skilled in the art will understand that various substitutions, variations and modifications are possible without departing from the spirit and scope of the present invention and the appended claims. Therefore, the scope of the present invention is not limited to the contents disclosed in the embodiments and drawings.

Claims

1. A dynamic and static multi-mode traction brace for post-traumatic elbow joint stiffness, characterized in that: The system includes a mode converter (1) and an arm frame (2) connected to the mode converter (1); the mode converter (1) is equipped with a mode conversion knob (1-1), which is connected to a gear shaft (1-8). A first bearing (1-6) and a second bearing (1-9) are respectively provided at both ends of the gear shaft (1-8). A guide shaft (1-12) is connected to the outer side of both the first bearing (1-6) and the second bearing (1-9). A rear cover is connected to the rear end of the guide shaft (1-12). 1-13), the front end of the guide shaft (1-12) is connected to a training knob (1-2), and the training knob (1-2) is connected to a front cover (1-3); a gear connector (1-7) is provided in the middle of the gear shaft (1-8), and a gear (1-10) is connected to the gear shaft (1-8) through the gear connector (1-7). A washer (1-11) is provided on the gear (1-10), and a forearm rotating gear (1-4) and an upper arm rotating gear (1-5) are respectively provided at both ends of the washer (1-11). The arm movement frame (2) includes a forearm movement frame A and an upper arm movement frame B. Both the forearm movement frame A and the upper arm movement frame B include a U-shaped slider (2-1), a fixing rod (2-2), and a fixing strap (2-3). The fixing rod (2-2) of the forearm movement frame A is fixedly connected to the forearm rotating gear (1-4), and the fixing rod (2-2) of the upper arm movement frame B is fixedly connected to the upper arm rotating gear (1-5). Two U-shaped sliders (2-1) are spaced apart on the fixing rod (2-2). The ends of the U-shaped sliders (2-1) are connected to the fixing strap (2-3). Both ends of the forearm rotating gear (1-4) and the upper arm rotating gear (1-5) are provided with spring fixing blocks (2-6). A spring (2-7) is connected between the spring fixing blocks (2-6) of the forearm rotating gear (1-4) and the upper arm rotating gear (1-5). The mode conversion knob (1-1) has through holes at both ends of its side and at the front end of the gear shaft (1-8). The mode conversion knob (1-1) and the gear shaft (1-8) are connected by pins (1-16) that pass through the through holes. The training knob (1-2) has two circular through holes, the guide shaft (1-12) has two circular through holes, and the rear cover (1-13) has two threaded holes. Two long bolts (1-15) pass through the circular through holes of the training knob (1-2) and the guide shaft (1-12) and are screwed into the threaded holes on the rear cover (1-13) to fix the mode converter 1. The training knob (1-2) drives the guide shaft (1-12). Rotation causes the guide shaft (1-12) to rotate, which in turn drives the gear (1-10) to rotate. The mode conversion knob (1-1) rotates, which in turn drives the gear shaft (1-8) to rotate. The gear shaft (1-8) rotates, which in turn drives the gear (1-10) to move horizontally. When the gear (1-10) moves to a position where it is not engaged with either the forearm rotating gear (1-4) or the upper arm rotating gear (1-5), it is in dynamic support mode. When the gear (1-10) moves to a position where it is engaged with the forearm rotating gear (1-4), it is in static support mode. When the gear (1-10) moves to a position where it is engaged with both the forearm rotating gear (1-4) and the upper arm rotating gear (1-5) simultaneously, it is in static fixed mode.

2. The dynamic and static multi-mode traction brace for post-traumatic elbow stiffness according to claim 1, characterized in that: The connection between the training knob (1-2) and the front cover (1-3), and the gasket (1-11) and the forearm rotating gear (1-4) and the upper arm rotating gear (1-5) are all made of mortise and tenon joints.

3. The dynamic and static multi-mode traction brace for post-traumatic elbow stiffness according to claim 1, characterized in that: The front end of the gear shaft (1-8) is cylindrical with a thread in the middle, and the rear end is cylindrical. The threaded section in the middle meshes with the gear connector (1-7).

4. The dynamic and static multi-mode traction brace for post-traumatic elbow stiffness according to claim 1, characterized in that: The gear connector (1-7) has a thread on its inner side and two keyways on its outer side. The gear (1-10) has two keyways. A key (1-14) is inserted into the keyways of the gear connector (1-7) and the gear (1-10) to connect the gear connector (1-7) and the gear (1-10).

5. The dynamic and static multi-mode traction brace for post-traumatic elbow stiffness according to claim 1, characterized in that: The guide shaft (1-12) is provided with two long keyways and two cuboid protrusions. The long keyways limit the horizontal displacement distance of the gear (1-10). The gear (1-10) is provided with two grooves. The cuboid protrusions on the guide shaft (1-12) cooperate with the grooves on the gear (1-10) to restrict the rotation of the gear (1-10) and realize the horizontal movement of the gear (1-10).

6. The dynamic and static multi-mode traction brace for post-traumatic elbow stiffness according to claim 1, characterized in that: The front end of the fixing rod (2-2) is provided with two circular through holes. The ends of the forearm rotating gear (1-4) and the upper arm rotating gear (1-5) are integrally formed with a cuboid plate. The cuboid plate is provided with two circular through holes. The fixing rod (2-2) is fixed to the forearm rotating gear (1-4) and the upper arm rotating gear (1-5) respectively by bolts and nuts (2-5) that pass through the circular through holes.

7. The dynamic and static multi-mode traction brace for post-traumatic elbow stiffness according to claim 1, characterized in that: The front middle section of the fixing rod (2-2) is provided with an upwardly inclined plane, and the rear section of the fixing rod (2-2) is provided with a rectangular through hole.

8. The dynamic and static multi-mode traction brace for post-traumatic elbow stiffness according to claim 1, characterized in that: The U-shaped slider (2-1) is slidably mounted on the fixed rod (2-2) and fixed to the fixed rod (2-2) by small bolts (2-4); the U-shaped slider (2-1) has two rectangular grooves at its end, and the fixing strap (2-3) is fixed in the rectangular grooves. The fixing strap (2-3) is a thickened nylon strap, which is wrapped around the forearm and upper arm by Velcro.

9. The dynamic and static multi-mode traction brace for post-traumatic elbow stiffness according to claim 1, characterized in that: The traction brace has three modes: static brace, stationary fixed brace, and dynamic brace. (a) Static brace mode: After adjusting the U-shaped slider (2-1) to a comfortable position for the patient, fix the patient's forearm to the forearm frame A with the fixing strap (2-3), and fix the patient's upper arm to the upper arm frame B with the fixing strap (2-3). Rotate the mode conversion knob (1-1) to move the gear (1-10) to the position of meshing with the forearm rotation gear (1-4), adjust the rehabilitation brace to the static brace mode, and then rotate the training knob (1-2) to drive the forearm frame A to rotate, thereby applying force to the elbow joint to complete the rehabilitation training; (b) Static fixation mode: After the U-shaped slider (2-1) is adjusted to a comfortable position for the patient, the patient's forearm is fixed to the forearm movement frame A with the fixation strap (2-3), and the patient's upper arm is fixed to the upper arm movement frame B with the fixation strap (2-3). When the elbow joint moves to the appropriate position, rotate the mode conversion knob (1-1) to move the gear (1-10) to the position where it meshes with the forearm rotation gear (1-4) and the upper arm rotation gear (1-5) at the same time, adjust the rehabilitation brace to the static fixation mode, fix the position of the elbow joint support, and thus fix the position of the elbow joint. (c) Dynamic brace mode: After adjusting the U-shaped slider (2-1) to a comfortable position for the patient, fix the patient's forearm to the forearm movement frame A with the fixing strap (2-3), and fix the patient's upper arm to the upper arm movement frame B with the fixing strap (2-3). Rotate the mode conversion knob (1-1) to move the gear (1-10) to a position that is not engaged with the forearm rotation gear (1-4) and the upper arm rotation gear (1-5), and adjust the rehabilitation brace to the dynamic brace mode. The user completes the rehabilitation training by applying force to the elbow joint through the spring.

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