A lower limb flexor and extensor muscle training device for MTT rehabilitation medical equipment

Abstract

This utility model relates to a lower limb flexor and extensor muscle training device for MTT rehabilitation medical equipment, including a frame, a pedal mechanism, a seat mechanism, and a counterweight box. The pedal mechanism and seat mechanism are respectively arranged at the front and rear of the frame. The seat mechanism includes a base, a traction rod, a backrest assembly, and a shoulder pressing assembly. The base is horizontally slidably connected to the frame, and the distance between the base and the pedal mechanism is adjustable to facilitate changing the initial position of the base. A traction rod with multiple traction holes is slidably connected to the lower part of the base. One end of the traction rod is connected to the counterweight box through a traction rope to ensure the initial position of the traction rod is fixed. A linkage handle is provided on the base, and the linkage handle is inserted into any one of the traction holes. A backrest assembly is slidably connected to one side of the upper part of the base, and a shoulder pressing assembly is slidably connected to the upper part of the backrest assembly. A gas spring is provided between the shoulder pressing assembly and the backrest assembly. This utility model can flexibly change the distance between the pedal mechanism and the seat mechanism to accommodate users of different heights.

Description

Technical Field

[0001] This utility model relates to the field of lower limb rehabilitation training equipment technology, and in particular to a lower limb flexor and extensor muscle group training device for MTT rehabilitation medical equipment. Background Technology

[0002] Lower limb rehabilitation exercise training equipment is mainly used to help patients with lower limb injuries to carry out rehabilitation training in order to restore or improve the function of their lower limbs. There are many types of such training equipment on the market, such as training by simulating walking, training the lower limbs actively or passively by using equipment similar to a stationary bike, and some using foot pedal flexion and extension for rehabilitation training.

[0003] Patent publication number CN219071985U discloses a leg-pushing training device for rehabilitation. During training, the thigh and lower leg are bent, the sole of the foot contacts the pedal, and the lower leg exerts force to squeeze the contact part, while the leg gradually straightens. After the user extends the leg, the seat moves from front to back, at which point the belt is pulled by the seat and the counterweight rises. When the user reduces the force exerted by the leg, the counterweight slowly returns to its original position, and the seat pushes the user from back to front, and the user's leg gradually returns to the bent position. Through repeated training, the device can enhance leg muscle strength.

[0004] It should be noted that the connection mechanism of the above-mentioned existing patents includes a belt, pulleys, a transfer guide wheel, and a fixing frame. One end of the belt is fixed to the counterweight via the pulley, and the other end passes through the bottom of the box and connects to the fixing frame via the transfer guide wheel. The fixing frame is fixed to the lower end of the slider. The base is fixed to the upper end of the slider. When the user sits on the base and slides, the counterweight can be raised and lowered by the belt, achieving the effect of weight training.

[0005] However, if no external force drives the base, the weight of the counterweight will pull the base back to its original position via a belt. This means the initial position of the base is always fixed and cannot be adjusted, and consequently, the horizontal distance between the base and the pedal is also fixed. As a result, it is difficult to accommodate users of different heights. When the user is tall, sitting between the base and the pedal will feel cramped and confined; when the user is short, it may be difficult for their feet to be stably placed on the pedal after sitting on the base. Summary of the Invention

[0006] To address the problem that existing rehabilitation training devices are difficult to adapt to different users, this utility model provides a lower limb flexor and extensor muscle training device for MTT rehabilitation medical equipment. With the pedal mechanism fixed, the seat mechanism can slide relative to the pedal mechanism and move in conjunction with the counterweight box to carry out lower limb flexion and extension training in the form of foot pedals. At the same time, the initial position of the seat mechanism is adjustable, changing the distance between the seat mechanism and the pedal mechanism to adapt to users of different heights.

[0007] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A lower limb flexor and extensor muscle training device for MTT rehabilitation medical equipment includes a frame, a pedal mechanism, a seat mechanism, and a counterweight box. The pedal mechanism and the seat mechanism are respectively arranged at the front and rear of the frame. The pedal mechanism includes a temporary pedal and an adjustable pedal. The temporary pedal is horizontally fixed on the frame. The adjustable pedal is connected to the frame above the temporary pedal to facilitate adjustment of the angle of the adjustable pedal. There is an angle between the adjustable pedal and the temporary pedal. The seat mechanism includes a base, a traction rod, a backrest assembly, and a shoulder pressing assembly. The base is horizontally slidable on the frame, and the distance between the base and the pedal mechanism is adjustable to facilitate changing the initial position of the base. The traction rod with multiple traction holes is slidably connected to the lower part of the base. One end of the traction rod is connected to the counterweight box via a traction rope to ensure the initial position of the traction rod is fixed. A linkage handle is provided on the base, and the linkage handle is inserted into any of the traction holes to facilitate the connection between the base and the traction rod. A seat cushion is provided on the upper part of the base, and the backrest assembly is rotated to one side of the upper part of the base. The shoulder pressing assembly is slidably connected to the upper part of the backrest assembly, and a gas spring is provided between the shoulder pressing assembly and the backrest assembly to facilitate the up and down movement of the shoulder pressing assembly.

[0008] Furthermore, the adjustable pedal includes a foot pedal, a rotating handle, a limiting plate, and a handle. The foot pedal is arranged at an angle, and there is a vertical gap between the foot pedal and the temporary pedal. The top of the foot pedal is rotatably connected to the frame, and the rotating handle for operating the rotation of the foot pedal is also provided on the top of the foot pedal.

[0009] Furthermore, the foot pedal is connected to the limiting plate at the bottom, and the limiting plate has a limiting groove with an "E" shaped cross section. A locking rod is fixedly installed on the frame. The locking rod passes through the limiting groove and is locked in the limiting groove. The foot pedal is at different angles depending on the locking position. A handle is provided at one end of the limiting plate for operating the rotation of the limiting plate.

[0010] Furthermore, the base includes a base plate, a sliding member, a connecting plate, and a linkage sleeve. The number of sliding members is two, and the base is slidably connected to the frame through the two sliding members. The frame is also horizontally provided with two cylindrical slide bars. The slide members and the slide bars correspond one-to-one. The corresponding slide members slide on the slide bars to facilitate the sliding of the slide members.

[0011] Furthermore, the sliding component includes a side plate, an upper roller, and a lower roller. There are two side plates, and a sliding rod is arranged between the two side plates. Two upper rollers and one lower roller are arranged between the two sliding plates. The two upper rollers and one lower roller are arranged in an inverted triangle shape. The upper rollers and the lower roller clamp the sliding rod from above and below and roll along the sliding rod.

[0012] Furthermore, a connecting plate is provided between the lower parts of the two sliding parts, and a linkage sleeve is provided on the connecting plate. The length direction of the linkage sleeve is consistent with the sliding direction of the base. The traction rod is inserted inside the linkage sleeve, and the traction rod is slidably connected to the linkage sleeve. The linkage sleeve is fixedly connected to the traction rod through the linkage handle, and the multiple traction holes on the traction rod are arranged in a straight line at intervals.

[0013] Furthermore, the linkage handle includes an indexing pin and an operating handle for operating the indexing pin. The indexing pin is disposed on the linkage sleeve, and the head of the indexing pin passes through the linkage sleeve and extends into any of the traction holes. The operating handle includes a control plate and a handle section for rotating the control plate. The upper end of the control plate is rotatably connected to the base, and the lower end of the control plate has a U-shaped groove that is engaged with the tail of an indexing pin. One end of the handle section is fixedly connected to the upper end of the control plate, and the other end of the handle section passes through a sliding member and extends out of the base to facilitate operation of the handle section.

[0014] Furthermore, a seat plate is disposed between the upper parts of the two sliding members, a seat cushion is arranged on the seat plate, and the backrest assembly is rotatably connected to the seat plate.

[0015] The beneficial effects of this utility model through the above technical solution are: The counterweight box of this utility model tightens the traction rod with a traction rope, thereby keeping the initial position of the traction rod fixed. On this basis, the seat mechanism is slidably connected to the traction rod through the base, that is, the base can slide relative to the traction rod. Therefore, the initial position of the base can be easily adjusted, and the distance between the base and the pedal mechanism can be changed, thus flexibly adapting to users of different heights.

[0016] After the base position is adjusted, the base and the traction rod can be connected by an indexing pin. The movement of the base can move the traction rod in conjunction with the movement of the base, ultimately causing the counterweight to rise and fall, thus realizing weight-bearing training for lower limb flexion and extension. The lower limbs move back and forth between bending and straightening, thereby causing the entire seat mechanism to move back and forth, achieving the exercise of the user's lower limb muscle groups.

[0017] The pedal mechanism of this invention has a fixed position. The temporary pedal is used to temporarily place the user's feet, while during training, the user's feet are placed on the adjustable pedal. The foot pedal in the adjustable pedal can rotate and is fixed after rotation by the cooperation of the limiting plate and the limiting groove. Thus, by adjusting the rotation angle of the foot pedal, it can adapt to the foot posture of different users, ensuring the user's comfort when stepping on the pedal. Attached Figure Description

[0018] Figure 1This is one of the isometric views of a lower limb flexor and extensor muscle training device for MTT rehabilitation medical equipment according to this utility model.

[0019] Figure 2 This is the second isometric view of a lower limb flexor and extensor muscle training device for MTT rehabilitation medical equipment according to this utility model.

[0020] Figure 3 This utility model relates to a lower limb flexor and extensor muscle training device for MTT rehabilitation medical equipment. Figure 2 The front view shows the direction in which the traction rope is wound, indicated by the arrows.

[0021] Figure 4 This is an isometric drawing of the pedal mechanism of a lower limb flexor and extensor muscle training device for MTT rehabilitation medical equipment according to this utility model.

[0022] Figure 5 This is an isometric drawing of the seat mechanism of a lower limb flexor and extensor muscle training device for MTT rehabilitation medical equipment according to this utility model.

[0023] Figure 6 This is a sliding cross-sectional view of the base of a lower limb flexor and extensor muscle training device for MTT rehabilitation medical equipment according to this utility model.

[0024] Figure 7 This is an isometric drawing of the backrest assembly of a lower limb flexor and extensor muscle training device for MTT rehabilitation medical equipment according to this utility model.

[0025] Figure 8 This is an isometric drawing of the shoulder pressing component of a lower limb flexor and extensor muscle training device for MTT rehabilitation medical equipment according to this utility model.

[0026] Figure 9 This is a schematic diagram of the traction rope winding path of a lower limb flexor and extensor muscle group training device for MTT rehabilitation medical equipment according to this utility model. The arrow in the figure points to the winding direction of the traction rope.

[0027] The attached diagram is labeled as follows: 1 frame, 2 pedal mechanism, 201 temporary pedal, 202 adjustable pedal, 2021 foot pedal, 2022 rotating handle, 2023 limit plate, 2024 handle one, 2025 limit groove, 2026 locking position, 2027 locking rod. 3 Seat mechanism, 31 Base, 311 Seat plate, 312 Sliding part, 313 Connecting plate, 314 Linkage sleeve, 4 Traction rod, 41 Traction hole, 5 Backrest assembly, 51 Backrest frame, 52 Backrest pad, 53 Waist pad, 54 Adjustment arc plate, 55 Hole, 56 Indexing pin two. 6 Shoulder pressure assembly, 61 Pressure frame, 62 Shoulder pad, 63 Armrest, 64 Headrest, 7 Slide bar, 8 Side plate, 9 Upper roller, 94 Long hole, 10 Lower roller, 11 Traction rope, 121 Limiting post, 122 Limiting pad; 13 Guide wheel, 14 Large guide wheel, 15 Small guide wheel, 16 Linkage handle, 161 Indexing pin one, 162 Operating handle, 17 Control panel, 18 Handle section, 19 U-shaped groove, 20 Seat cushion, 21 Slide rail, 22 Slider, 23 Adjusting plate, 231 Round hole, 24 Indexing pin three, 25 Adjusting handle, 26 Gas spring, 27 Lifting rod, 28 Counterweight box. Detailed Implementation

[0028] The specific embodiments of this utility model are described in detail below with reference to the accompanying drawings: like Figures 1-9 As shown, a lower limb flexor and extensor muscle training device for MTT rehabilitation medical equipment includes a frame 1, a pedal mechanism 2, a seat mechanism 3, and a counterweight box 28. The frame 1 is a steel structure frame, with the pedal mechanism 2 and seat mechanism 3 respectively installed at the front and rear of the frame 1. The installation position of the pedal mechanism 2 is fixed, while the seat mechanism 3 can slide horizontally on the frame 1; during rehabilitation training, the seat mechanism 3 moves back and forth towards and away from the pedal mechanism 2.

[0029] The pedal mechanism 2 includes a temporary pedal 201 and an adjustable pedal 202. The temporary pedal 201 is horizontally fixed on the frame 1. When the user first sits on the training equipment, his feet are placed on the temporary pedal 201. During the training process, his feet leave the temporary pedal 201 and step on the adjustable pedal 202.

[0030] An adjustable pedal 202 is connected to the frame 1 above the temporary pedal 201, and the adjustable pedal 202 and the temporary pedal 201 are at an angle. Specifically, the adjustable pedal 202 includes a foot pedal 2021, a rotating handle 2022, a limiting plate 2023 and a handle 2024. The foot pedal 2021 and the temporary pedal 201 are spaced vertically, and the foot pedal 2021 is arranged at an angle. The top of the foot pedal 2021 is rotatably connected to the frame 1. It is because of the rotatable connection between the two that the foot pedal 2021 can be adjusted from a vertical state to an inclined state.

[0031] To facilitate the operation of the foot pedal 2021, a rotating handle 2022 is provided on the top of the foot pedal 2021. The rotating handle 2022 is bent into a "U" shape. Both ends of the rotating handle 2022 are connected and fixed to the foot pedal 2021. The rotation of the foot pedal 2021 can be controlled by rotating the handle 2022.

[0032] To achieve fixation after rotation, a limiting plate 2023 is connected to the bottom of the foot pedal 2021. A handle 2024 is provided at one end of the limiting plate 2023, facilitating rotation of the limiting plate 2023. The limiting plate 2023 has a limiting groove 2025 with a cross-section approximately "E"-shaped. The limiting groove 2025 has three recesses, each of which is a locking position 2026, arranged at an angle. Simultaneously, a locking rod 2027 is fixedly installed on the frame 1. The locking rod 2027 passes through the limiting groove 2025 and engages with it. Specifically, the locking rod 2027 engages with any one of the three locking positions 2026. Different engagement positions of the locking rod 2027 result in different tilt angles for the foot pedal 2021. The adjustable tilt angle of the foot pedal 2021 is designed to accommodate different users' foot pressure angles and match the angles that suit different individuals.

[0033] In the initial state, the lever 2027 is engaged in the slot 2026 closest to the foot pedal 2021. At this time, the foot pedal 2021 remains vertical, and the limiting plate 2023 wants to rotate downward under the action of gravity. As a result, the current slot 2026 is always engaged with the lever 2027 to prevent the foot pedal 2021 from rotating.

[0034] When adjusting the foot pedal 2021: First, rotate the limiting plate 2023 upwards to disengage the current locking position 2026 from the locking lever 2027. Then, rotate the foot pedal 2021. During rotation, the limiting plate 2023 moves along with it. After the second locking position 2026 on the limiting plate 2023 aligns with the locking lever 2027, the limiting plate 2023 drops down, causing the locking lever 2027 to engage with the second locking position 2026. At this point, the foot pedal 2021 is no longer vertical but at a certain angle. When the user steps on the foot pedal 2021, the applied force tends to rotate the foot pedal 2021 to a vertical position. The greater the applied force, the more reliably the locking lever 2027 engages with the locking position 2026, preventing accidental rotation of the foot pedal 2021.

[0035] In this embodiment, the seat mechanism 3 includes a base 31, a traction rod 4, a backrest assembly 5, and a shoulder pressing assembly 6. The base 31 is horizontally slidable on the frame 1. Since the base 31 is slidable, the distance between the base 31 and the pedal mechanism 2 is adjustable. The base 31 includes a seat plate 311, sliding members 312, a connecting plate 313, and a linkage sleeve 314. There are two sliding members 312. The base 31 is slidably connected to the frame 1 by the two sliding members 312. The connecting plate 313 is arranged between the lower parts of the two sliding members 312, and the seat plate 311 is arranged between the upper parts of the two sliding members 312. The two sliding members 312 are connected by the upper and lower seat plates 311 and the connecting plate 313, thus forming a "U"-shaped base 31 structure.

[0036] To enable the base 31 to slide, two cylindrical slide rods 7 are horizontally arranged on the frame 1. Sliders 312 and slide rods 7 correspond one-to-one, with the corresponding sliders 312 sliding onto the slide rods 7. Each slide rod 312 includes a side plate 8, an upper roller 9, and a lower roller 10. There are two side plates 8, each approximately the shape of an inverted isosceles trapezoid. A slide rod 7 is arranged between the two side plates 8. Two upper rollers 9 and one lower roller 10 are arranged between the two side plates 8 in an inverted triangular shape. The upper rollers 9 and lower roller 10 clamp the slide rod 7 vertically and roll along it. This allows the base 31 to slide horizontally only, restricting its vertical movement.

[0037] It should be noted that the two upper rollers 9 are spaced apart above the slide bar 7, and the lower roller 10 is centrally located between the two upper rollers 9 and below the slide bar 7. The upper rollers 9 and the lower roller 10 have the same structure and their outer surfaces are arc-shaped grooves to fit the cylindrical surface of the slide bar 7.

[0038] The upper roller 9 is fixed in position during installation. Specifically, after placing the upper roller 9 between the two side plates 8, a threaded rod is passed through the upper roller 9 and out of the side plate 8. The side plate 8 has holes for the threaded rod to pass through. Both ends of the threaded rod are connected to nuts after passing through the side plate 8. Tightening the nuts fixes the position of the upper roller 9. However, the installation position of the lower roller 10 is adjustable to adjust the clamping force of the sliding rod 7. The installation operation of the lower roller 10 is basically the same as above, except that the side plate 8 has an inclined elongated hole 94. The threaded rod can move within the elongated hole 94, thus adjusting the installation position of the lower roller 10.

[0039] A traction rod 4 with multiple traction holes 41 is slidably connected to the lower part of the base 31, allowing the base 31 to slide relative to the traction rod 4, which is a square tube structure. Specifically, a square tube-shaped linkage sleeve 314 is provided on the connecting plate 313 of the base 31, with the length direction of the linkage sleeve 314 aligned with the sliding direction of the base 31. The traction rod 4 passes through the linkage sleeve 314, and the traction rod 4 is slidably connected to the linkage sleeve 314. The multiple traction holes 41 on the traction rod 4 are arranged in a straight line at intervals.

[0040] One end of the traction rod 4 is connected to the counterweight box 28 via the traction rope 11. Under the action of the counterweight box 28, the traction rod 4 can be pulled by the traction rope 11 to slide within the linkage sleeve 314, and the initial position of the traction rod 4 is always fixed. That is, a limiting pad 122 is set on the frame 1, and a limiting post 121 is set at the end of the traction rod 4. In the initial state, under the pull of the traction rope 11, the limiting post 121 always abuts against the limiting pad 122, and thus the initial position of the traction rod 4 remains unchanged.

[0041] The counterweight box 28 is prior art. The counterweight box 28 includes a box body and counterweight blocks that slide up and down inside the box body. For details, please refer to patent publication number CN218474849U, a weight-bearing mechanism in a rehabilitation training device, or patent publication number CN219023127U, a counterweight box in a rehabilitation shoulder press training device.

[0042] When the traction rope 11 is connected to the counterweight box 28, part of the traction rope 11 is inside the counterweight box 28 and the other part is outside the counterweight box 28. The winding path of the traction rope 11 inside the counterweight box 28 is the existing method, that is, a guide wheel 13 is set at the bottom of one side of the counterweight box 28. After the traction rope 11 outside the counterweight box 28 passes around the guide wheel 13, it extends vertically upward from one side of the bottom of the counterweight box 28 to the top of the counterweight box 28, then extends horizontally to the center of the counterweight box 28, and finally extends vertically downward and connects with the counterweight block.

[0043] The traction rope 11 outside the counterweight box 28 is wound along the following path: A small guide wheel 15 is installed on the frame 1, arranged horizontally and located below the seat mechanism 3. Simultaneously, a large guide wheel 14 is installed on the frame 1 below the temporary pedal 201, arranged vertically. The large guide wheel 14, small guide wheel 15, and guide wheel 13 are arranged in an "L" shape. After extending from the guide wheel 13 into the counterweight box 28, the traction rope 11 passes sequentially around the small guide wheel 15 and the large guide wheel 14, finally connecting and fixing to the end of the traction rod 4. In this way, under the action of the counterweight in the counterweight box 28, the traction rope 11 allows the traction rod 4 to always move to the left, thus ensuring that the limiting post 121 always presses against the limiting pad 122.

[0044] Driven by an external force, specifically by the seat mechanism 3, the traction rod 4 can move to the right. This rightward movement requires overcoming the weight of the counterweight. Furthermore, for the seat mechanism 3 to move the traction rod 4, a specific connection structure is needed. Specifically, a linkage handle 16 is provided on the base 31. The linkage handle 16 is inserted into any of the traction holes 41, allowing the linkage sleeve 314 to be fixedly connected to the traction rod 4 via the linkage handle 16. In this way, the base 31 can move the traction rod 4 via the linkage handle 16.

[0045] In this embodiment, the linkage handle 16 includes an indexing pin 161 and an operating handle 162 for operating the indexing pin 161. The indexing pin 161 is disposed on the linkage sleeve 314. After the head of the indexing pin 161 passes through the linkage sleeve 314, it extends into any one of the traction holes 41. At this time, the linkage sleeve 314 is connected and fixed to the traction rod 4, and the two can move together. When the base 31 slides, the traction rod 4 slides together.

[0046] The operating handle 162 is used to allow the indexing pin 161 to engage with different traction holes 41, thereby changing the initial position of the base 31. The operating handle 162 includes a control plate 17 and a handle section 18 for rotating the control plate 17. The upper end of the control plate 17 is rotatably connected to the base 31, and the lower end of the control plate 17 has a U-shaped groove 19, which is engaged with the tail of the indexing pin 161. One end of the handle section 18 is fixedly connected to the upper end of the control plate 17, and the other end of the handle section 18 extends out of the base 31 after passing through a slider 312. The handle section 18 is bent into an L-shape.

[0047] After the handle section 18 is connected and fixed to the control plate 17, it will rotate downwards under the action of gravity. At this time, the lower end of the control plate 17 rests against the indexing pin 161. If the indexing pin 161 is to be controlled, the handle section 18 is lifted upwards, which in turn drives the control plate 17 to rotate. The control plate 17 pulls the indexing pin 161 outwards through the U-shaped groove 19, and then the head of the indexing pin 161 retracts and disengages from the traction hole 41. At this time, the base 31 can slide relative to the traction rod 4, thereby adjusting the position of the base 31 relative to the traction rod 4.

[0048] A seat cushion 20 is provided on the upper part of the base 31, that is, the seat cushion 20 is arranged on the seat plate 311. A backrest assembly 5 is rotatably connected to one side of the upper part of the base 31. Specifically, the backrest assembly 5 includes a backrest frame 51, a backrest cushion 52, a lumbar cushion 53, and an adjustment arc plate 54. The bottom end of the backrest frame 51 is rotatably connected to the seat plate 311, the backrest cushion 52 is provided on the backrest frame 51, and the lumbar cushion 53 is provided below the backrest cushion 52.

[0049] An adjusting arc plate 54 is provided at the lower part of the backrest frame 51. The adjusting arc plate 54 is bent into an arc shape and has multiple holes 55. At the same time, a second indexing pin 56 is provided on the seat plate 311. The head of the second indexing pin 56 is inserted into any of the holes 55 to fix the rotation angle of the backrest assembly 5. Through the cooperation of the second indexing pin 56 and the multiple holes 55 on the adjusting arc plate 54, the rotation angle of the backrest assembly 5 can be adjusted within the range of 0-90°. Thus, the backrest assembly 5 can be adjusted from a vertical state to a horizontal state, allowing the user to sit or lie down.

[0050] To improve upper body stability during training, a shoulder-pressure component 6 is slidably attached to the upper part of the backrest assembly 5. The shoulder-pressure component 6 can press down the user's shoulders and prevent upper body swaying. The shoulder-pressure component 6 includes a pressure frame 61, shoulder pads 62, and armrests 63. The pressure frame 61 has an "U"-shaped cross-section and extends to the backrest pad 52. A headrest 64 is provided on the front side of the pressure frame 61, and shoulder pads 62 and armrests 63 are provided on the pressure frames 61 on both sides of the headrest 64.

[0051] The pressure frame 61 and the backrest frame 51 are slidably connected via a slide rail and slider structure. Specifically, the backrest frame 51 has two slide rails 21, and the pressure frame 61 has two sliders 22 on its rear side. The sliders 22 have slide rails 21 passing through them and move along the slide rails 21. To achieve sliding fixation, an adjusting plate 23 is provided on the backrest frame 51, located between the two slide rails 21. The adjusting plate 23 has multiple circular holes 231 arranged in a straight line. A dividing pin 24 is provided on the rear side of the pressure frame 61. The head of the dividing pin 24 is inserted into any of the circular holes 231, fixing the position of the entire pressure shoulder assembly 6. When the head of the dividing pin 24 disengages from the circular hole 231, the pressure shoulder assembly 6 can slide.

[0052] To facilitate operation of the indexing pin 24, an adjusting handle 25 is connected to the rear side of the pressure frame 61. The adjusting handle 25 controls the indexing pin 24. The combination of the adjusting handle 25 and the indexing pin 24 is structurally similar to the linkage handle 16. Under its own weight, one end of the adjusting handle 25 rests against the indexing pin 24. The other end of the adjusting handle 25 also holds the tail of the indexing pin 24 through a U-shaped groove 19. When the indexing pin 24 needs to be removed, the adjusting handle 25 is manually operated to rotate it, pulling out the head of the indexing pin 24. At this time, the shoulder pressing assembly 6 is unlocked and can slide freely up and down. A gas spring 26 is installed between the shoulder pressing assembly 6 and the backrest assembly 5. The gas spring 26 is installed between the pressure frame 61 and the backrest frame 51, and assists in the movement of the shoulder pressing assembly 6.

[0053] The principle of this invention is as follows: The user first sits on the seat cushion 20 with their feet temporarily placed on the temporary footrest 201. An assistant adjusts the position of the seat cushion 20 according to the user's leg length. During adjustment, the linkage handle 16 is raised, causing the indexing pin 161 to retract, disconnecting the base 31 from the traction rod 4. Then, the base 31 is moved to ensure the user's legs maintain a suitable posture. After releasing the linkage handle 16, it falls, and simultaneously, the indexing pin 161 inserts into the traction hole 41, connecting the base 31 to the traction rod 4. During the movement of the base 31, the traction rod 4 remains stationary because the counterweight box 28 pulls the traction rod 4 taut via the traction rope 11.

[0054] After the seat cushion 20 is adjusted, the user's feet rest on the adjustable pedal 202. The assistant can adjust the angle of the adjustable pedal 202 based on the user's feedback to ensure the user's feet are in a suitable posture. The angle of the backrest assembly 5 is adjusted by the engagement of the indexing pin 26 with different holes 55, ensuring the user is in a comfortable leaning posture. Finally, the vertical position of the shoulder pressure assembly 6 is adjusted by the engagement of the indexing pin 34 with different round holes 231, ensuring the shoulder pad 62 can restrict the user's shoulders downwards. Meanwhile, a suspension rod 27 is installed on the base 31. The upper end of the suspension rod 27 extends horizontally above the temporary pedal 201. Two suspension straps (not shown in the figure) are installed on the upper end of the suspension rod 27. These straps connect downwards to the user's legs, lifting the user's legs and providing some weight reduction.

[0055] After preparation, the user exerts force with both legs, gradually straightening them, causing the entire seat mechanism 3 to move backward. The base 31 moves backward, pulling the traction rod 4 backward as well. The traction rod 4, via the traction rope 11, lifts the counterweight, thus achieving weight training. As the user's legs become less strained and tend to bend, the weight of the counterweight eventually moves the traction rod 4 and base 31 forward together. This repeated process provides the user with leg flexion and extension training, thereby strengthening lower limb muscles.

[0056] The embodiments described above are merely preferred embodiments of this utility model and are not intended to limit the scope of implementation of this utility model. Therefore, all equivalent changes or modifications made to the structure, features and principles described in the patent claims of this utility model should be included within the scope of the patent application of this utility model.

Claims

1. A lower extremity flexor-extensor muscle group training apparatus for MTT rehabilitation medical equipment, characterized in that, The system includes a frame (1), a pedal mechanism (2), a seat mechanism (3), and a counterweight box (28). The pedal mechanism (2) and the seat mechanism (3) are respectively arranged at the front and rear of the frame (1). The pedal mechanism (2) includes a temporary pedal (201) and an adjustable pedal (202). The temporary pedal (201) is horizontally fixed on the frame (1). The adjustable pedal (202) is connected to the frame (1) above the temporary pedal (201). There is an angle between the adjustable pedal (202) and the temporary pedal (201). The seat mechanism (3) includes a base (31), a traction rod (4), a backrest assembly (5), and a shoulder pressing assembly (6). The base (31) is horizontally slidably connected to the frame (1). The distance between the base (31) and the pedal mechanism (2) is adjustable. The traction rod (4) with multiple traction holes (41) is slidably connected to the lower part of the base (31). One end of the traction rod (4) is connected to the counterweight box (28) through a traction rope (11). A linkage handle (16) is provided on the base (31). The linkage handle (16) is inserted into any one of the traction holes (41). A seat cushion (20) is provided on the upper part of the base (31). The backrest assembly (5) is connected to one side of the upper part of the base (31). The shoulder pressing assembly (6) is slidably connected to the upper part of the backrest assembly (5). A gas spring (26) is provided between the shoulder pressing assembly (6) and the backrest assembly (5).

2. The lower limb flexor and extensor muscle training device for MTT rehabilitation medical equipment according to claim 1, characterized in that, The adjustable pedal (202) includes a foot pedal (2021), a rotating handle (2022), a limiting plate (2023), and a handle (2024). The foot pedal (2021) is arranged at an angle, and there is a gap between the foot pedal (2021) and the temporary pedal (201). The top of the foot pedal (2021) is rotatably connected to the frame (1). The top of the foot pedal (2021) is also provided with the rotating handle (2022) for operating the rotation of the foot pedal (2021).

3. The lower limb flexor and extensor muscle training device for MTT rehabilitation medical equipment according to claim 2, characterized in that, The foot pedal (2021) is connected to the bottom of the limiting plate (2023). The limiting plate (2023) has a limiting groove (2025) with an "E" shaped cross section. A locking rod (2027) is fixedly installed on the frame (1). The locking rod (2027) passes through the limiting groove (2025) and is locked in the limiting groove (2025). One end of the limiting plate (2023) is provided with the handle (2024) for operating the rotation of the limiting plate (2023).

4. The lower limb flexor and extensor muscle training device for MTT rehabilitation medical equipment according to claim 1, characterized in that, The base (31) includes a base plate (311), a sliding member (312), a connecting plate (313) and a linkage sleeve (314). There are two sliding members (312), and the base (31) is slidably connected to the frame (1) through the two sliding members (312). Two cylindrical slide rods (7) are also horizontally arranged on the frame (1). The sliding member (312) and the slide rod (7) correspond one-to-one, and the corresponding sliding member (312) slides on the slide rod (7).

5. The lower limb flexor and extensor muscle training device for MTT rehabilitation medical equipment according to claim 4, characterized in that, The sliding member (312) includes a side plate (8), an upper roller (9) and a lower roller (10). There are two side plates (8), and a sliding rod (7) is arranged between the two side plates (8). Two upper rollers (9) and one lower roller (10) are arranged between the two side plates (8). The two upper rollers (9) and one lower roller (10) are arranged in an inverted triangle shape. The upper rollers (9) and the lower rollers (10) clamp the sliding rod (7) from above and below and roll along the sliding rod (7).

6. The lower limb flexor and extensor muscle training device for MTT rehabilitation medical equipment according to claim 4, characterized in that, A connecting plate (313) is provided between the lower parts of the two sliding parts (312), and a linkage sleeve (314) is provided on the connecting plate (313). The length direction of the linkage sleeve (314) is consistent with the sliding direction of the base (31). The linkage sleeve (314) is provided with the traction rod (4), the traction rod (4) is slidably connected to the linkage sleeve (314), the linkage sleeve (314) is fixedly connected to the traction rod (4) through the linkage handle (16), and the multiple traction holes (41) on the traction rod (4) are arranged in a straight line.

7. The lower limb flexor and extensor muscle training device for MTT rehabilitation medical equipment according to claim 6, characterized in that, The linkage handle (16) includes an indexing pin (161) and an operating handle (162) for operating the indexing pin (161). The indexing pin (161) is disposed on the linkage sleeve (314). The head of the indexing pin (161) passes through the linkage sleeve (314) and extends into any of the traction holes (41). The operating handle (162) includes a control plate (17) and a handle section (18) for manipulating the rotation of the control plate (17). The upper end of the control plate (17) is rotatably connected to the base (31), and the lower end of the control plate (17) has a U-shaped groove (19). The U-shaped groove (19) is engaged with the tail of the indexing pin (161). One end of the handle section (18) is connected and fixed to the upper end of the control plate (17), and the other end of the handle section (18) passes through a slider (312) and extends out of the base (31).

8. The lower limb flexor and extensor muscle training device for MTT rehabilitation medical equipment according to claim 4, characterized in that, The seat plate (311) is disposed between the upper parts of the two sliding members (312), and a cushion (20) is arranged on the seat plate (311). The backrest assembly (5) is rotatably connected to the seat plate (311).

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