Knee joint auxiliary rehabilitation exercise device

Abstract

The utility model discloses a kind of knee joint auxiliary rehabilitation exercise devices, including fixed seat, the top outer wall of the fixed seat is fixedly connected with protective cover, the circumferential inner wall of protective cover is fixedly connected with arc block, two rotating discs are connected to the two side faces of arc block respectively through guiding connection structure;Two the side face outward of the rotating disc is all provided with adjustable bearing structure.The utility model can select different exercise mode according to the actual demand of rehabilitation stage, such as the passive rehabilitation exercise of synchronous or asynchronous to double legs knee joint by intermittent drive assembly in early rehabilitation stage, the motor can not be energized in middle and late rehabilitation stage, patient rotates two rotating discs by self-control double legs'pedaling bicycle'action to control, relatively, resistance increases, to realize the active rehabilitation exercise of synchronous or asynchronous to double legs knee joint, effectively improve rehabilitation effect and adaptability, expand application range.

Description

Technical Field

[0001] This utility model relates to the field of medical rehabilitation equipment technology, and in particular to a knee joint assistive rehabilitation exercise device. Background Technology

[0002] As the largest and most complex weight-bearing joint in the human body, the knee joint requires scientific rehabilitation training in cases of sports injuries (such as ligament tears and meniscus injuries) and postoperative recovery (such as joint replacement surgery). Current knee joint rehabilitation devices are limited in function and rely on physical therapist guidance or patient self-exercise, leading to issues such as improper training movements. This is especially problematic for postoperative patients who require strict control of joint range of motion in the early postoperative period to avoid secondary injury.

[0003] A search revealed a Chinese patent application with patent number CN201921004367.5, which discloses a knee joint function rehabilitation training device, including a thigh guard, a base, a support adjustment rod, an anti-slip base plate, and a traction mechanism; it is used for early and mid-term postoperative functional rehabilitation, and can increase the knee joint flexion angle by relying on the patient's own weight, thereby reducing patient pain and reducing the physical burden on medical staff.

[0004] However, the knee joint function rehabilitation training device in the above patent still has the following shortcomings: it relies solely on the patient's gravity to adjust the knee joint flexion and extension exercise angle, which has a limited scope of application. For example, in the early stage of rehabilitation, the patient cannot overcome the resistance of gravity to complete the movement, resulting in the inability to exercise or the need to rely on the assistance of others. Moreover, the exercise resistance is determined by the patient's weight and the angle of gravity, and the resistance cannot be adjusted according to the actual needs of the rehabilitation stage, thus affecting the rehabilitation effect and adaptability. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of existing technologies by proposing a knee joint assistive rehabilitation exercise device.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A knee joint assistive rehabilitation exercise device includes a fixed base, a protective cover is fixedly connected to the top outer wall of the fixed base, an arc-shaped block is fixedly connected to the inner circumference of the protective cover, and two rotating disks are respectively connected to the two sides of the arc-shaped block through a guide connection structure.

[0008] Both of the rotating disks have an adjustable support structure on their outward-facing sides. The adjustable support structure includes a J-shaped connecting rod fixedly connected to one side of the rotating disk, a fastening pin inserted into the inner circumference of the J-shaped connecting rod, a J-shaped connector inserted into the inner wall of one end of the J-shaped connecting rod, multiple adjustment holes equidistantly arranged on the outer circumference of the J-shaped connector, and a foot pedal rotatably connected to one end of the J-shaped connector.

[0009] Each of the fixed seats located on both sides of the protective cover is provided with an intermittent drive assembly for rotating the rotating disk on one side.

[0010] As a further embodiment of this utility model: the guide connection structure includes a guide block with a T-shaped cross-section fixedly connected to one side of the arc-shaped block, an annular rail with a T-shaped cross-section disposed on one side of the rotating disk, and an auxiliary support rod fixedly connected to the outer wall of the top of the fixed seat, and the guide block and the inner wall of the rotating disk form a sliding fit.

[0011] The two sides of the auxiliary support rod are in sliding fit with the inner walls of the two rotating disks, respectively.

[0012] As a further embodiment of this utility model: the intermittent drive assembly includes multiple limiting ports equidistantly arranged on the outer wall of the rotating disk, a motor box fixedly connected to the inner wall of the bottom of the fixed base, a rotating wheel rotatably connected to one side of the fixed base, and a limiting head fixedly connected to one end face of the rotating wheel, wherein the outer wall of the limiting head is adapted to the width of the limiting port.

[0013] As a further improvement of this utility model: a motor is fixedly connected to the bottom inner wall of the motor box, and the output end of the motor is connected to one end of the rotating wheel through a coupling.

[0014] As a further embodiment of this utility model: an inclined support arm is fixedly connected to the top outer wall of the fixed base, a seat plate is fixedly connected to one side outer wall of the support arm, and a backrest is fixedly connected to the top outer wall of the seat plate.

[0015] As a further embodiment of this utility model: a telescopic head is fixedly connected to one side of one of the rotating disks, and a set of spring columns is fixedly connected to the outer wall of the extension end of the telescopic head.

[0016] As a further embodiment of this utility model: another rotating disk is fixedly connected to one side of an annular seat. The inner circumference of the annular seat is provided with an insertion hole adapted to the spring column, and a set of T-shaped pressing heads are inserted into the outer circumference of the annular seat. One end of the T-shaped pressing head passes through the inner wall of one end of the insertion hole.

[0017] Compared with the prior art, this utility model provides a knee joint assistive rehabilitation exercise device, which has the following beneficial effects:

[0018] 1. This knee joint assistive rehabilitation exercise device can select different exercise modes according to the actual needs of the rehabilitation stage. For example, in the early stage of rehabilitation, the intermittent drive component can be used to perform synchronous or asynchronous passive rehabilitation exercises on both knee joints. In the middle and late stages of rehabilitation, the motor can be de-energized, and the patient can control the rotation of the two rotating discs by voluntarily controlling both legs to make a "cycling" motion. The resistance is relatively increased, thereby realizing synchronous or asynchronous active rehabilitation exercises on both knee joints, effectively improving the rehabilitation effect and adaptability, and expanding the scope of application.

[0019] 2. This knee joint assistive rehabilitation exercise device allows for quick adjustment of the length of the J-type connecting head and the J-type connecting head by adjusting the insertion depth of the J-type connector into the J-type link according to the patient's different height and leg length. Then, the fastening pin is screwed in so that one end is inserted into a corresponding adjustment hole, thereby quickly adjusting the length of the J-type link and the J-type connector.

[0020] 3. This knee joint assistive rehabilitation exercise device involves squeezing two spring columns to compress their elastic elements (such as coil springs), and pulling forward on the extension of the telescopic head. The extension of the telescopic head inserts into the corresponding annular seat until the spring column reaches its corresponding insertion hole. The axial elastic release of the elastic element abuts against the insertion hole, thus connecting the two rotating discs together via the telescopic head and the annular seat. This allows a single motor to simultaneously drive both discs, achieving synchronized exercise control of both knee joints and effectively saving mechanical power. For disassembly, pressing the T-shaped pressing head compresses one end of the spring column and pulls outward on the extension of the telescopic head, effectively separating the spring column from the insertion hole. This allows for independent control of the two rotating discs, enabling independent exercise control of both knee joints. This device is suitable for patients at different stages of knee joint rehabilitation. Attached Figure Description

[0021] Figure 1 This is a side view of the structure of a knee joint assistive rehabilitation exercise device proposed in this utility model;

[0022] Figure 2 This is a front view structural diagram of a knee joint assistive rehabilitation exercise device proposed in this utility model;

[0023] Figure 3 This is a rear view structural diagram of a knee joint assistive rehabilitation exercise device proposed in this utility model;

[0024] Figure 4 This is an exploded view of the rotating wheel and one of the rotating disks and arc blocks of a knee joint assistive rehabilitation exercise device proposed in this utility model.

[0025] Figure 5 This is a top view of one of the rotating discs in a knee joint assistive rehabilitation exercise device proposed in this utility model.

[0026] Figure 6 This is an enlarged structural diagram of part A of the knee joint assistive rehabilitation exercise device proposed in this utility model.

[0027] In the diagram: 1. Fixed base, 2. Seat plate, 201. Backrest rod, 3. J-type connecting rod, 301. J-type connector, 3100. Fastening pin, 3101. Adjustment hole, 4. Protective cover, 401. Arc block, 4011. Guide block, 5. Rotating disc, 501. Limiting port, 502. Circular rail, 6. Motor box, 7. Auxiliary support rod, 8. Circular seat, 801. T-type pressing head, 802. Insertion hole, 9. Foot pedal, 10. Telescopic head, 1001. Spring column, 11. Rotary wheel, 1101. Limiting head, 12. Support arm. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0029] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0030] Example 1

[0031] A knee joint assistive rehabilitation exercise device, such as Figure 1-6 As shown, the device includes a fixed base 1. A protective cover 4 is fixed to the top outer wall of the fixed base 1 by bolts. An arc-shaped block 401 is fixed to the inner circumference of the protective cover 4 by bolts. Two rotating disks 5 are connected to the two sides of the arc-shaped block 401 by a guide connection structure. The guide connection structure includes a guide block 4011 with a T-shaped cross-section welded to one side of the arc-shaped block 401, an annular rail 502 with a T-shaped cross-section opened on one side of the rotating disk 5, and an auxiliary support rod 7 fixed to the top outer wall of the fixed base 1 by bolts. The guide block 4011 and the inner wall of the rotating disk 5 form a sliding fit.

[0032] During use, the two rotating discs 5 on the left and right can rotate in a circular motion under the guidance of the guide block 4011 and the support of the auxiliary support rod 7 during passive rotation, thereby realizing multi-angle adjustment of knee joint exercise.

[0033] Preferably, the two sides of the auxiliary support rod 7 are in sliding contact with the inner walls of the two rotating disks 5 respectively; the dual arrangement of the auxiliary support rod 7 and the guide block 4011 effectively ensures the structural stability of the rotating disk 5 during use.

[0034] Furthermore, each of the two rotating disks 5 has an adjustable support structure for leg rests on its outward-facing side. The adjustable support structure includes a J-shaped connecting rod 3 fixed to one side of the rotating disk 5 by bolts, a fastening pin 3100 inserted into the inner circumference of the J-shaped connecting rod 3, a J-shaped connector 301 inserted into the inner wall of one end of the J-shaped connecting rod 3, a plurality of adjustment holes 3101 equally spaced on the outer circumference of the J-shaped connector 301, and a foot pedal 9 rotatably connected to one end of the J-shaped connector 301.

[0035] Depending on the patient's height and leg length, adjust the insertion depth of the J-type connector 301 within the J-type link 3 to a suitable position, and then screw in the fastening pin 3100 so that one end is inserted into a corresponding adjustment hole 3101. This allows for quick adjustment of the usable length of the J-type link 3 and the J-type connector 301. The patient sits on the seat 2 with their legs apart and their feet inserted into the two foot pedals 9. During use, the patient controls the rotation of the two rotating discs 5 by voluntarily controlling their legs to perform a "cycling" motion. This increases resistance, allowing for synchronous or asynchronous active rehabilitation exercises of the knee joints. It is convenient to use.

[0036] Alternatively, one of the rotating disks 5 has a telescopic head 10 fixed to one side by bolts. A set of compression spring columns 1001 are welded to the outer wall of the extension end of the telescopic head 10. This is prior art, and its structural principle will not be described in detail. Another rotating disk 5 has an annular seat 8 fixed to one side by bolts. The inner circumference of the annular seat 8 has an insertion hole 802 that matches the spring column 1001. A set of T-shaped pressing heads 801 are inserted into the outer circumference of the annular seat 8. One end of the T-shaped pressing head 801 passes through the inner wall of one end of the insertion hole 802.

[0037] By squeezing the two spring posts 1001 to compress their elastic elements (such as coil springs), and pulling the extension of the telescopic head 10 forward, the extended end of the telescopic head 10 is inserted into the annular seat 8 directly in front, until the spring post 1001 corresponds to the insertion hole 802. The axial elastic release of the elastic element then abuts against the insertion hole 802, thus connecting the two rotating discs 5 together through the telescopic head 10 and the annular seat 8. This allows a single motor to simultaneously drive both rotating discs 5, achieving synchronized exercise control of both knee joints and effectively saving mechanical power. For disassembly, press the T-shaped pressing head 801 with your fingers to compress one end of the spring post 1001, and pull the extension of the telescopic head 10 outward, effectively separating the spring post 1001 from the insertion hole 802. This allows each rotating disc 5 to operate asynchronously, achieving independent exercise control of both knee joints, suitable for patients at different stages of knee joint rehabilitation.

[0038] like Figure 1 and Figure 3 As shown, the top outer wall of the fixed seat 1 located behind the protective cover 4 is fixed with an inclined support arm 12 by bolts. One side outer wall of the support arm 12 is fixed with a seat plate 2 by bolts. The top outer wall of the seat plate 2 is fixed with a backrest 201 by bolts. After the patient sits on the seat plate 2, the backrest 201 can abut against the back of the patient's buttocks to fix the patient's sitting posture range.

[0039] Working principle: Based on the patient's height and leg length, adjust the insertion depth of the J-type connector 301 within the J-type link 3 to a suitable position, then screw in the fastening pin 3100, inserting one end into a corresponding adjustment hole 3101. This allows for quick adjustment of the length of the J-type link 3 and the J-type connector 301. The patient sits on the seat 2, with legs apart and feet inserted into the two foot pedals 9. During use, the patient controls the rotation of the two rotating discs 5 by autonomously controlling their legs in a "cycling" motion. During passive rotation, the two discs 5 rotate in a circular motion under the guidance of the guide block 4011 and the support of the auxiliary support rod 7, thus achieving multi-angle adjustments for knee joint exercise.

[0040] Example 2

[0041] A knee joint assistive rehabilitation exercise device, such as Figure 1 and Figure 3-4As shown, in order to provide another driving mode for exercise, this embodiment makes the following improvements based on embodiment 1: the fixed seats 1 located on both sides of the protective cover 4 are provided with intermittent driving components for rotating the rotating disk 5 on their corresponding sides. The intermittent driving components include several limiting ports 501 that are equidistantly opened on the outer wall of the circumference of the rotating disk 5, a motor box 6 that is fixed to the inner wall of the bottom of the fixed seat 1 by bolts, a rotating wheel 11 that is rotatably connected to one side of the fixed seat 1, and a limiting head 1101 that is fixed to one end face of the rotating wheel 11 by bolts, and the outer wall of the limiting head 1101 is adapted to the width of the limiting port 501.

[0042] Preferably, the motor is fixed to the bottom inner wall of the motor housing 6 by bolts, and the output end of the motor is connected to one end of the rotor 11 by a coupling;

[0043] During use, the two motors are powered on and started, which drives the corresponding rotating wheel 11 to rotate, causing the limiting head 1101 to rotate. When the limiting head 1101 completes one revolution of the shaft, it is inserted into a certain limiting port 501 at a fixed position, thereby causing the rotating disk 5 to rotate at a fixed distance. During this period, the rotation speed of the rotating disk 5 can be controlled by controlling the motor speed, thereby realizing independent passive control of the speed of knee joint exercise for the patient's two legs. The passive exercise speed can be flexibly switched according to the patient's recovery stage, making it convenient to use.

[0044] Working principle: The intermittent drive component can perform synchronous or asynchronous passive rehabilitation exercises on the knee joints of both legs; alternatively, the motor can be de-energized for autonomous rehabilitation exercises, allowing users to choose the exercise mode according to their own situation.

[0045] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A knee joint assistive rehabilitation exercise device, comprising a fixed base (1), characterized in that, The top outer wall of the fixed base (1) is fixedly connected to a protective cover (4), and the inner circumference of the protective cover (4) is fixedly connected to an arc block (401). The two sides of the arc block (401) are respectively connected to two rotating disks (5) through a guide connection structure. Both of the rotating disks (5) are provided with an adjustable support structure on their outward-facing side. The adjustable support structure includes a J-shaped connecting rod (3) fixedly connected to one side of the rotating disk (5), a fastening pin (3100) inserted into the inner circumference of the J-shaped connecting rod (3), a J-shaped connector (301) inserted into the inner wall of one end of the J-shaped connecting rod (3), multiple adjustment holes (3101) equidistantly arranged on the outer circumference of the J-shaped connector (301), and a foot pedal (9) rotatably connected to one end of the J-shaped connector (301). The fixed bases (1) located on both sides of the protective cover (4) are provided with intermittent drive components for rotating the rotating disk (5) on one side.

2. The knee joint assistive rehabilitation exercise device according to claim 1, characterized in that, The guide connection structure includes a guide block (4011) fixedly connected to one side of the arc block (401) with a T-shaped cross-section, an annular rail (502) set on one side of the rotating disk (5) with a T-shaped cross-section, and an auxiliary support rod (7) fixedly connected to the top outer wall of the fixed seat (1). The guide block (4011) and the inner wall of the rotating disk (5) form a sliding fit. The two sides of the auxiliary support rod (7) are in sliding fit with the inner walls of the two rotating disks (5).

3. The knee joint assistive rehabilitation exercise device according to claim 2, characterized in that, The intermittent drive assembly includes multiple equidistant limiting ports (501) arranged on the outer circumference of the rotating disk (5), a motor box (6) fixedly connected to the inner bottom wall of the fixed base (1), a rotating wheel (11) rotatably connected to one side of the fixed base (1), and a limiting head (1101) fixedly connected to one end face of the rotating wheel (11), wherein the outer wall of the limiting head (1101) is adapted to the width of the limiting port (501).

4. The knee joint assistive rehabilitation exercise device according to claim 3, characterized in that, A motor is fixedly connected to the bottom inner wall of the motor housing (6), and the output end of the motor is connected to one end of the rotating wheel (11) through a coupling.

5. The knee joint assistive rehabilitation exercise device according to claim 1, characterized in that, The top outer wall of the fixed seat (1) is fixedly connected to an inclined support arm (12), and a seat plate (2) is fixedly connected to one side outer wall of the support arm (12). A backrest (201) is fixedly connected to the top outer wall of the seat plate (2).

6. The knee joint assistive rehabilitation exercise device according to claim 1, characterized in that, One of the rotating disks (5) is fixedly connected to a telescopic head (10) on one side, and a set of spring columns (1001) are fixedly connected to the outer wall of the extension end of the telescopic head (10).

7. The knee joint assistive rehabilitation exercise device according to claim 6, characterized in that, Another rotating disk (5) is fixedly connected to one side of an annular seat (8). The inner circumference of the annular seat (8) is provided with a socket (802) that is compatible with the spring column (1001). A set of T-shaped pressing heads (801) are inserted into the outer circumference of the annular seat (8). One end of the T-shaped pressing head (801) passes through the inner wall of one end of the socket (802).

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