Joint drafting brace

Abstract

The utility model relates to the technical field of rehabilitation medical assistive devices, and discloses a joint drafting brace which comprises a mounting frame, a first bearing assembly, a second bearing assembly and an adjusting mechanism. The first bearing assembly and the second bearing assembly are both arranged on the mounting frame, each of the first bearing assembly and the second bearing assembly comprises a swinging part, a driving mechanism and a bearing frame, the swinging parts are connected to the mounting frame in a swinging manner, and the bearing frames are connected to the swinging parts in a position adjustable manner; the driving mechanism is connected with the swing part of the first bearing assembly and the swing part of the second bearing assembly, and the driving mechanism is suitable for driving the swing part of the first bearing assembly and the swing part of the second bearing assembly to synchronously swing in the opposite direction or the reverse direction; the adjusting mechanism is arranged between the swing part and the bearing frame and is suitable for adjusting the relative position of the bearing frame relative to the swing part. Different patient individuals can be adjusted in a self-adaptive mode, bearing positions and movement tracks matched with the patient individuals are formed, and then the optimal traction effect matched in real time is provided.

Description

Technical Field

[0001] The utility model relates to the technical field of rehabilitation medical auxiliary equipment, in particular to a joint stretching brace. Background Art

[0002] The most common complication after elbow surgery is traumatic joint stiffness, which seriously affects the patient's limb function and even leads to lifelong disability. Postoperative rehabilitation therapy with a stretch brace is the preferred measure to improve elbow stiffness after surgery, and the static progressive stretch brace has been proven to be the most effective auxiliary treatment device and is also a rehabilitation medical aid commonly used by medical institutions.

[0003] The rotating arm of an existing rehabilitation brace usually moves along a fixed guide rail, so the motion trajectory is fixed each time the angle is adjusted. However, due to differences in body size, bone physiological structure, structural changes caused by postoperative inflammation and swelling of joint soft tissues, subtle differences in the binding position of the rehabilitation brace, and other factors, the motion trajectory will continue to change in real time during the flexion and extension movement. Therefore, a rehabilitation brace with a fixed motion trajectory cannot provide the best traction effect that matches the joint movement deformation in real time. Utility Model Content

[0004] In view of this, the utility model provides a joint stretching brace to solve the problem that the existing stretching brace cannot provide the best traction effect that matches the joint movement deformation in real time.

[0005] In a first aspect, the utility model provides a joint distraction brace, comprising:

[0006] Mounting frame;

[0007] The first supporting assembly and the second supporting assembly are both arranged on the mounting frame, and the first supporting assembly and the second supporting assembly both comprise a swinging member, a driving mechanism and a supporting frame, the swinging member is swingably connected to the mounting frame, the supporting frame is positionally adjustable and connected to the swinging member, the driving mechanism is connected to the swinging member of the first supporting assembly and the swinging member of the second supporting assembly, and the driving mechanism is suitable for driving the swinging member of the first supporting assembly and the swinging member of the second supporting assembly to swing synchronously towards or in opposite directions;

[0008] The adjusting mechanism is arranged between the swinging member and the supporting frame and is suitable for adjusting the relative position of the supporting frame with respect to the swinging member.

[0009] Beneficial effects: The joint distraction brace can drive the swinging member of the first supporting component and the swinging member of the second supporting component to swing synchronously in the same direction or in the opposite direction through the driving mechanism, and can simulate the flexion and extension process of the joint (such as the elbow joint and the knee joint) to distract the stiff joint after surgery and reduce the degree of traumatic joint stiffness. The position of the support frame is adjustably connected to the swinging member, so that the support frame can be adjusted according to the user's body size to ensure that the support frame can support the limb more stably and comfortably; and by setting an adjustment mechanism between the swinging member and the support frame, the relative position of the support frame relative to the swinging member can be adjusted, so that the support frame has stronger adaptability, can be adaptively adjusted to different individual patients, and form a support position and motion trajectory that matches the individual patient, thereby providing the best real-time matching joint motion deformation traction effect.

[0010] In an optional embodiment, the adjustment mechanism includes a plurality of adjustment rods, one end of each adjustment rod is movably connected to the swinging member, and the other end of each adjustment rod is rotatably connected to the first supporting assembly or the second supporting assembly.

[0011] Beneficial effect: By connecting the support frame and the swinging member through several adjustment rods, the support frame can change its relative position with the swinging member, adapt to the movement trajectory of different individual patients during the stretching process, provide better support for the patients, improve the comfort of the stretching process, and avoid secondary injuries to the patients.

[0012] In an optional embodiment, an elastic gasket is provided between one end of the adjusting rod connected to the swinging member and the swinging member and / or between one end of the adjusting rod connected to the supporting bracket and the supporting bracket.

[0013] Beneficial effect: The elastic gasket allows freedom in a specific direction to be formed between the end of the adjusting rod connected to the swinging member and the swinging member and / or between the end of the adjusting rod connected to the supporting frame and the supporting frame, so that the relative position of the supporting frame can be changed relatively freely, and then during the stretching of the elbow joint, the supporting frame can be driven by the forearm to a position that adapts to the carrying angle, thereby improving the patient's comfort during stretching and avoiding secondary injury to the patient during the stretching process.

[0014] In an optional embodiment, four adjusting rods are provided, two adjusting rods are connected to both sides of the swing member, and the adjusting rods on both sides of the swing member are arranged in parallel.

[0015] Beneficial effects: The structure is simple and stable, which reduces the production cost while ensuring that the support frame supports the limb stably and that the support frame is adaptive to the movement trajectories of different patients.

[0016] In an optional implementation, the adjustment rods on the same side of the swing member are arranged in parallel.

[0017] Beneficial effect: the adjustment mechanism is in the shape of a parallelogram, which provides a larger adaptive range and provides a stable support.

[0018] In an optional embodiment, the driving mechanism includes a screw rod, a rocker rod and a connecting rod, the screw rod and the rocker rod are both rotatably connected to the mounting frame, a worm gear is provided at one end of the rocker rod, the worm gear is threadedly connected to the screw rod, and the two ends of the connecting rod are respectively rotatably connected to the other end of the rocker rod and the swinging member.

[0019] Beneficial effects: Through the screw and two worm gears, the rotation of the screw can simultaneously control the swing arms on both sides to drive the swinging part to swing; and the screw and worm gear structure can be adjusted accurately and slowly to ensure safety during the stretching process, and the self-locking effect between the screw and the worm gear can also be used to achieve locking of the two support bracket positions during the stretching.

[0020] In an optional embodiment, the driving mechanism further includes a knob, one end of the screw rod away from the swinging member extends out of the mounting bracket, and the knob is connected to one end of the screw rod.

[0021] Beneficial effect: The end of the screw rod away from the swinging member can be located at the rear side of the elbow joint or the front side of the knee joint, so that the patient can adjust the opening degree by turning the knob during stretching.

[0022] In an optional embodiment, the support bracket includes a support plate and a strap, one side of the support plate is connected to the adjustment mechanism, two ends of the strap are respectively detachably connected to two sides of the support plate, and a limiting space is formed between the strap and the other side of the support plate.

[0023] Beneficial effect: the arm or the leg can be connected to the support frame within the limited space, and the driving mechanism drives the two support frames to move away from each other to form a stretching of the elbow joint or the knee joint.

[0024] In an optional embodiment, the support bracket also includes a slider, a slide groove is provided on the side of the support plate close to the adjustment mechanism, the slide groove is provided along the length direction of the support plate, the slider is slidably provided in the slide groove, and the adjustment mechanism is connected to the slider.

[0025] Beneficial effect: The position of the support frame relative to the swinging member can be adjusted, further enhancing the support frame's ability to adapt to different individual patients.

[0026] In an optional embodiment, the support bracket also includes a positioning pin, the support plate is provided with a plurality of first positioning holes along its length direction, the slider is provided with a plurality of second positioning holes, and the positioning pin is suitable for being inserted into one of the second positioning holes and one of the first positioning holes.

[0027] Beneficial effect: When the positioning pin is inserted into one of the second positioning holes and one of the first positioning holes, the position of the support frame is fixed, thereby ensuring the stability of the support. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0029] Figure 1 It is a structural schematic diagram of a joint distraction brace according to an embodiment of the utility model;

[0030] Figure 2 This is a front view of a joint distraction brace according to an embodiment of the utility model;

[0031] Figure 3 This is a schematic diagram of the cooperation of a knob, a screw rod and a rocker arm according to an embodiment of the utility model (with the mounting frame removed).

[0032] Description of reference numerals:

[0033] 1. Mounting frame;

[0034] 21. Swinging piece;

[0035] 22, driving mechanism; 221, screw rod; 222, rocker rod; 2221, worm gear; 223, connecting rod; 224, knob;

[0036] 23, supporting frame; 231, supporting plate; 2311, sliding groove; 2312, first positioning hole; 232, binding belt; 233, sliding block;

[0037] 3. Adjustment mechanism; 31. Adjustment rod. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.

[0039] Combine the following Figures 1 to 3, describing an embodiment of the joint distraction brace provided by the utility model.

[0040] According to an embodiment of the utility model, on the one hand, a joint stretching brace is provided, comprising a mounting frame 1, a first supporting assembly, a second supporting assembly and an adjusting mechanism 3. The first supporting assembly and the second supporting assembly are both arranged on the mounting frame 1, and the first supporting assembly and the second supporting assembly both comprise a swinging member 21, a driving mechanism 22 and a supporting frame 23, the swinging member 21 is swingably connected to the mounting frame 1, the supporting frame 23 is positionally adjustable connected to the swinging member 21, the driving mechanism 22 is connected to the swinging member 21 of the first supporting assembly and the swinging member 21 of the second supporting assembly, and the driving mechanism 22 is suitable for driving the swinging member 21 of the first supporting assembly and the swinging member 21 of the second supporting assembly to swing synchronously in the same direction or in the opposite direction; the adjusting mechanism 3 is arranged between the swinging member 21 and the supporting frame 23, and is suitable for adjusting the relative position of the supporting frame 23 relative to the swinging member 21.

[0041] The joint distraction brace provided in this embodiment can drive the swinging member 21 of the first supporting component and the swinging member 21 of the second supporting component to swing synchronously in the same direction or in the opposite direction through the driving mechanism 22, so as to simulate the flexion and extension process of the joint (such as the elbow joint and the knee joint) to distract the stiff joint after surgery and reduce the degree of traumatic joint stiffness. The support frame 23 is adjustably connected to the swinging member 21, so that the support frame 23 can be adjusted according to the user's body size to ensure that the support frame 23 can support the limb more stably and comfortably; and by setting an adjustment mechanism 3 between the swinging member 21 and the support frame 23, the relative position of the support frame 23 relative to the swinging member 21 can be adjusted, so that the support frame 23 is more adaptable, and can be adaptively adjusted to different individual patients to form a support position and motion trajectory that matches the individual patient, thereby providing the best real-time matching joint motion deformation traction effect.

[0042] Specifically, the adjustment mechanism 3 includes a plurality of adjustment rods 31, one end of which is movably connected to the swing member 21, and the other end of which is rotatably connected to the first support assembly or the second support assembly. By connecting the support frame 23 and the swing member 21 through a plurality of adjustment rods 31, the relative position of the support frame 23 and the swing member 21 can be changed. Under the condition that the angle between the upper arm and the lower arm is adjusted unchanged, the two support frames 23 can be freely moved closer or farther away, so that the adaptive function of the relative position change during the flexion and extension of the upper and lower arms can be realized, which can adapt to the movement trajectory of different individual patients, provide better support for patients, improve the comfort of the stretching process, and avoid secondary injuries to patients.

[0043] When the elbow joint is in the extended position, the forearm is completely supinated, and the valgus angle formed between the forearm and the upper arm is called the carrying angle. Existing stretching braces usually cannot adapt to the carrying angle. Specifically, in the present embodiment, an elastic gasket (not shown in the figure) is provided between the end of the adjusting rod 31 connected to the swing member 21 and the swing member 21 and / or between the end of the adjusting rod 31 connected to the support bracket 23 and the support bracket 23. The elastic gasket enables the adjustment rod 31 to form multiple degrees of freedom in multiple directions between the end of the adjusting rod 31 connected to the swing member 21 and the swing member 21 and / or between the end of the adjusting rod 31 connected to the support bracket 23 and the support bracket 23, so that the relative position of the support bracket 23 can be changed relatively freely, and then during the stretching process of the elbow joint, the support bracket 23 can be driven by the forearm to a position adapted to the carrying angle, thereby improving the patient's comfort during stretching and avoiding secondary injury to the patient during stretching.

[0044] In other embodiments, a universal joint may also be provided at one end of the adjusting rod 31 connected to the swing member 21. The swing member 21 is provided with a plurality of supports, and the supports correspond one-to-one with the adjusting rod 31. The universal joint is installed with the swing member 21 through the supports, thereby increasing the degree of freedom of the supporting bracket 23 to adapt to the carrying angle.

[0045] The utility model does not limit the number of the adjustment rods 31. In the embodiment, four adjustment rods 31 are provided, and two adjustment rods 31 are connected to both sides of the swing member 21. The adjustment rods 31 on both sides of the swing member 21 are arranged in parallel. The structure is simple and stable, and the production cost is reduced while ensuring that the support frame 23 supports the limb stably and the support frame 23 is self-adaptive to the movement trajectories of different patients.

[0046] Specifically, during the stretching process, the position of the forearm will drive one of the support brackets 23 to rotate, and the two adjustment rods 31 connected to the support bracket 23 and located on the opposite side of the swing member 21 will produce synchronous lateral rotation around the end connected to the swing member 21, while the two adjustment rods 31 located on the same side of the swing member 21 will synchronously produce lateral rotation in different directions, thereby achieving adaptation to the carrying angle.

[0047] Furthermore, the adjusting rods 31 on the same side of the swinging member 21 are arranged in parallel, so that the adjusting mechanism 3 is in the shape of a parallelogram, providing a larger adaptive range and stable support.

[0048] Furthermore, a release part is provided at one end of the adjusting rod 31 connected to the support frame 23 and / or at one end of the adjusting rod 31 connected to the swinging member 21. When the flexion and extension angle of the joint driven by the two support frames 23 approaches the limit angle that the joint can withstand, the resistance exerted by the joint on the continued swinging and rotation of the two support frames 23 will increase significantly. At this time, if the swinging member 21 is continued to drive the support frame 23 to move, the release part will be disconnected from the support frame 23 and / or the swinging member 21 when the force exceeds the preset limit value, thereby avoiding harm to the patient. In this embodiment, the release part is set to a shape that is easy to concentrate stress. When the force is too large, the release part will be directly destroyed to separate the adjusting rod 31 from the support frame 23. In other embodiments, it can also be made into a gap smaller than the diameter of the rotation axis of the adjusting rod 31 and the support frame 23. When the force is too large, the rotation axis of the adjusting rod 31 will be disengaged from the release part.

[0049] Specifically, the driving mechanism 22 includes a screw rod 221, a swing rod 222 and a connecting rod 223. The screw rod 221 and the swing rod 222 are both rotatably connected to the mounting frame 1. A worm wheel 2221 is provided at one end of the swing rod 222. The worm wheel 2221 is screwed to the screw rod 221. The two ends of the connecting rod 223 are respectively rotatably connected to the other end of the swing rod 222 and the swing member 21. Through the screw rod 221 and the two worm wheels 2221, the rotation of the screw rod 221 can simultaneously control the swing rods 222 on both sides to drive the swing member 21 to swing; and the screw rod 221 and the worm wheel 2221 structure are accurately and slowly adjusted to ensure safety during the drafting process. The positions of the two support brackets 23 during the drafting can also be locked through the self-locking effect between the screw rod 221 and the worm wheel 2221.

[0050] The utility model does not limit the adjustment range of the worm gear 2221 and the screw rod 221. In this embodiment, the worm gear 2221 and the screw rod 221 can achieve an adjustment range of -30° to 180° for the elbow joint or the knee joint, which can be suitable for more patients and has a better rehabilitation effect. In other embodiments, different adjustment ranges can be achieved by changing the sizes of the swinging member 21, the connecting rod 223 and the rocker arm 222.

[0051] In this embodiment, the support frame 23 and the swing member 21 are arranged above the worm gear 2221 at one end of the swing rod 222, so that the rotation center of the support frame 23 driven by the swing member 21 is away from the elbow joint, which can reduce the discomfort of the elbow joint during the stretching process.

[0052] Furthermore, the driving mechanism 22 further includes a knob 224, one end of the screw rod 221 away from the swinging member 21 extends out of the mounting frame 1, and the knob 224 is connected to one end of the screw rod 221. The end of the screw rod 221 away from the swinging member 21 can be located at the rear side of the elbow joint or the front side of the knee joint, so that the patient can adjust the opening degree by turning the knob 224 during the stretching.

[0053] Specifically, the support bracket 23 includes a support plate 231 and a strap 232. One side of the support plate 231 is connected to the adjustment mechanism 3. Both ends of the strap 232 are detachably connected to the two sides of the support plate 231, and a limited space is formed between the strap 232 and the other side of the support plate 231. The arm or leg can be connected to the support bracket 23 in the limited space, and the driving mechanism 22 drives the two support brackets 23 to move away from each other to form a stretch of the elbow joint or knee joint.

[0054] Specifically, the support frame 23 further includes a slider 233, a slide groove 2311 is provided on the side of the support plate 231 close to the adjustment mechanism 3, the slide groove 2311 is provided along the length direction of the support plate 231, the slider 233 is slidably provided in the slide groove 2311, and the adjustment mechanism 3 is connected to the slider 233. The position of the support frame 23 relative to the swing member 21 is adjustable, further enhancing the adaptive ability of the support frame 23 to different individual patients.

[0055] Specifically, the support bracket 23 also includes a positioning pin, the support plate 231 is provided with a plurality of first positioning holes 2312 along its length direction, the slider 233 is provided with a plurality of second positioning holes, and the positioning pin is suitable for being inserted into one of the second positioning holes and one of the first positioning holes 2312. When the positioning pin is inserted into one of the second positioning holes and one of the first positioning holes 2312, the position of the support bracket 23 is fixed, thereby ensuring the stability of the support.

[0056] Furthermore, the length dimension of one of the support plates 231 is greater than the length dimension of the other support plate 231 , so that the longer support plate 231 can better support the longer forearm.

[0057] In this embodiment, the swing member 21 and the adjustment rod 31 are both provided with a plurality of connection holes. The relative positions between the swing member 21 and the adjustment rod 31 and between the swing member 21 and the connection rod 223 can be changed by connecting the rotating shaft to different connection holes, thereby further expanding the adaptability to different patient groups. At the same time, the relative length of the swing member 21 and / or the adjustment rod 31 can be changed by connecting to different connection holes, thereby changing the torque transmission angle, rotation angular velocity, moment magnitude, stretching force magnitude, etc., and making corresponding adjustments according to different joint injuries to protect joint safety.

[0058] Although the embodiments of the present invention are described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations are all within the scope defined by the appended claims.

Claims

1. A joint stretching brace, characterized in that: include: Mounting frame (1); A first supporting assembly and a second supporting assembly are both arranged on the mounting frame (1); the first supporting assembly and the second supporting assembly both comprise a swinging member (21), a driving mechanism (22) and a supporting frame (23); the swinging member (21) is swingably connected to the mounting frame (1); the supporting frame (23) is positionally adjustable and connected to the swinging member (21); the driving mechanism (22) is connected to the swinging member (21) of the first supporting assembly and the swinging member (21) of the second supporting assembly; the driving mechanism (22) is suitable for driving the swinging member (21) of the first supporting assembly and the swinging member (21) of the second supporting assembly to swing synchronously in opposite directions or in opposite directions; The adjustment mechanism (3) is arranged between the swing member (21) and the support frame (23) and is suitable for adjusting the relative position of the support frame (23) with respect to the swing member (21).

2. The joint distraction brace according to claim 1, characterized in that: The adjustment mechanism (3) comprises a plurality of adjustment rods (31), one end of the adjustment rod (31) is movably connected to the swing member (21), and the other end of the adjustment rod (31) is rotationally connected to the first supporting assembly or the second supporting assembly.

3. The joint distraction brace according to claim 2, characterized in that: An elastic gasket is provided between one end of the adjusting rod (31) connected to the swinging member (21) and the swinging member (21) and / or between one end of the adjusting rod (31) connected to the supporting bracket (23) and the supporting bracket (23).

4. The joint distraction brace according to claim 2, characterized in that: Four adjusting rods (31) are provided, and two adjusting rods (31) are connected to both sides of the swing member (21). The adjusting rods (31) on both sides of the swing member (21) are arranged in parallel.

5. The joint distraction brace according to claim 4, characterized in that: The adjusting rods (31) on the same side of the swinging member (21) are arranged in parallel.

6. The joint distraction brace according to claim 1, characterized in that: The driving mechanism (22) comprises a screw rod (221), a swing rod (222) and a connecting rod (223); the screw rod (221) and the swing rod (222) are both rotatably connected to the mounting frame (1); a worm gear (2221) is provided at one end of the swing rod (222); the worm gear (2221) is threadedly connected to the screw rod (221); and two ends of the connecting rod (223) are rotatably connected to the other end of the swing rod (222) and the swing member (21).

7. The joint distraction brace according to claim 6, characterized in that: The driving mechanism (22) further comprises a knob (224), one end of the screw rod (221) away from the swinging member (21) extends out of the mounting frame (1), and the knob (224) is connected to one end of the screw rod (221).

8. The joint distraction brace according to any one of claims 1 to 7, characterized in that: The support frame (23) comprises a support plate (231) and a binding belt (232); one side of the support plate (231) is connected to the adjustment mechanism (3); two ends of the binding belt (232) are detachably connected to two sides of the support plate (231) respectively; a limiting space is formed between the binding belt (232) and the other side of the support plate (231).

9. The joint distraction brace according to claim 8, characterized in that: The support frame (23) further comprises a slider (233); a slide groove (2311) is arranged on the side of the support plate (231) close to the adjustment mechanism (3); the slide groove (2311) is arranged along the length direction of the support plate (231); the slider (233) is slidably arranged in the slide groove (2311); and the adjustment mechanism (3) is connected to the slider (233).

10. The joint distraction brace according to claim 9, characterized in that: The support bracket (23) further comprises a positioning pin, the support plate (231) is provided with a plurality of first positioning holes (2312) along its length direction, the slider (233) is provided with a plurality of second positioning holes, and the positioning pin is suitable for being inserted into one of the second positioning holes and one of the first positioning holes (2312).

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