Lower limb movement assistive device for severe rehabilitation

Abstract

The invention provides a lower limb exercise assistive device for severe rehabilitation. The lower limb exercise assistive device comprises a base, an exercise mechanism and a resistance mechanism. During exercise, a patient places heels on the placing seat, treads on the pedal and fixes the heels, then the patient actively bends knees to drive the placing seat to slide close to the first end, the placing seat slides to drive the pedal to swing in a reciprocating mode through the transmission assembly, and the pedal swings in a reciprocating mode to drive the feet to hook and tighten the feet. When anti-resistance exercise needs to be carried out, an inserting assembly is adjusted to be connected with a corresponding resistance block in an inserting mode, when knee bending exercise enables a placement base to drive the resistance block to move close to the first end through the inserting assembly, a compression spring is pressed, resistance can be generated on the knee bending exercise, and therefore the patient can do various exercises at the same time, and the rehabilitation exercise effect of the device is improved. The resistance of the knee bending movement can be increased or reduced by increasing or reducing the number of the inserted connection assemblies and the resistance blocks, the resistance movement can be conveniently carried out, the resistance of the resistance movement can be conveniently adjusted, and the practicability of the device is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of rehabilitation exercise, and in particular to a lower limb exercise aid for severe illness rehabilitation. Background Art

[0002] Severely ill patients are prone to lower limb muscle weakness, joint stiffness, dysfunction and other problems due to serious illness, weakness after surgery or long-term bed rest. Lower limb exercises can help patients restore lower limb function, reduce the risk of complications, and promote rapid recovery and independent life of patients.

[0003] Lower limb rehabilitation exercises for critically ill patients usually include the following stages: passive exercise, which is trained according to the patient's range of joint motion. It requires more force than active exercise, and it is easier to maintain the maximum range of motion for a short time. The degree of force should be controlled according to the patient's pain. Be careful not to apply too much force to avoid new injuries. It is suitable for patients with muscle strength levels 0-1; active assisted exercise, which uses various equipment to actively contract muscles to complete exercise training. It is suitable for patients with muscle strength levels 1-2; active exercise, which is based on the degree of joint motion limitation. After each training within the maximum range, a little more force should be applied to cause mild pain. It is suitable for patients with muscle strength level 3; resistance exercise, which is endurance training for muscle groups. It is suitable for patients with muscle strength above level 3.

[0004] Most of the existing lower limb exercise devices for critical illness rehabilitation have simple structures and can usually only assist patients in doing a single active exercise, which reduces the rehabilitation exercise effect of the device. In addition, it is not convenient to perform resistance exercise and adjust the resistance of resistance exercise, which reduces the practicality of the device. Therefore, in view of the above technical problems, a lower limb exercise assistive device for critical illness rehabilitation is proposed. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention proposes a lower limb exercise assistive device for critical illness rehabilitation, which can assist patients in performing multiple exercises at the same time, improve the rehabilitation training effect of the device, and facilitate resistance exercise and adjustment of the resistance of resistance exercise, thereby improving the practicality of the device.

[0006] A lower limb exercise assistive device for severe rehabilitation, comprising:

[0007] A base, which can be placed on a hospital bed, the base comprising a first end and a second end opposite to each other along a length direction thereof;

[0008] An exercise mechanism, comprising a placement seat, a pedal and a transmission assembly, wherein the placement seat is arranged at the top of the base and can slide along the length direction of the base, the bottom end of the pedal is hinged to the top of the placement seat, the foot can be fixed on the pedal, and the transmission assembly connects the base, the placement seat and the pedal to convert the sliding of the placement seat into the reciprocating swing of the pedal; and

[0009] The resistance mechanism includes a resistance block, a compression spring and a plug-in assembly. The base is slidably provided with multiple groups of the resistance blocks along its length direction. The multiple groups of resistance blocks are respectively connected to the base with the compression springs. The compression springs are used to apply a thrust to the resistance blocks away from the first end. Multiple groups of the plug-in assemblies are arranged on the placement seat corresponding to the multiple groups of resistance blocks. The plug-in assemblies can be plugged in or separated from the corresponding resistance blocks by adjusting.

[0010] The beneficial effects of the above-mentioned lower limb exercise assistive device for severe illness rehabilitation are:

[0011] During exercise, the patient places his heels on the placement seat and steps on the pedal and fixes it. Then the patient actively performs knee flexion exercise, and the knee flexion exercise drives the placement seat to slide close to the first end. The sliding of the placement seat drives the pedal to swing back and forth through the transmission component. The reciprocating swing of the pedal can drive the foot to hook the foot and stretch the foot, so that the patient can perform multiple exercises at the same time, thereby improving the rehabilitation exercise effect of the device. When resistance exercise is needed, the plug-in component is adjusted to be plugged with the corresponding resistance block. When the knee flexion exercise causes the placement seat to slide close to the first end, the placement seat drives the resistance block to move close to the first end through the plug-in component. At this time, the compression spring is compressed to generate resistance to the knee flexion exercise, and increasing or decreasing the number of groups of plug-in components and resistance blocks can increase or decrease the resistance of the knee flexion exercise, which is convenient for resistance exercise and adjustment of the resistance of resistance exercise, thereby improving the practicability of the device.

[0012] In one embodiment, the transmission assembly includes a gear, a rack and a lever; the gear is rotatably arranged on one side of the placement seat, the rack is arranged on the base along the length direction of the base, the gear is meshed with the rack, the lever can be slidably arranged on the placement seat along the length direction of the base, the bottom end of the lever is provided with a first shifting groove, the top end is provided with a second shifting groove, the gear is eccentrically provided with a first shifting shaft, the first shifting shaft is slidably arranged in the first shifting groove, the pedal is eccentrically provided with a second shifting shaft relative to the hinge shaft, the second shifting shaft is slidably arranged in the second shifting groove. The movement of the placement seat drives the gear to move, the gear moves and meshes with the rack to drive the gear to rotate, the gear rotates through the first shifting shaft and the first shifting groove to drive the lever to move back and forth, the lever moves back and forth through the second shifting groove and the second shifting shaft to drive the pedal to swing back and forth, and the pedal can be driven to swing back and forth conveniently.

[0013] In one embodiment, the transmission assembly further includes an adjusting assembly, the first shifting shaft is connected to the gear via the adjusting assembly, and the adjusting assembly is used to drive the first shifting shaft to slide radially along the gear. When the first shift shaft slides radially along the gear to increase the eccentricity of the first shift shaft, the gear rotates through the first shift shaft and the first shift groove to drive the shift rod to move back and forth, and the stroke of the reciprocating movement of the shift rod is increased by cooperating with the first shift shaft and the first shift groove. The reciprocating stroke of the shift rod is increased by cooperating with the second shift groove and the second shift shaft to drive the pedal to swing back and forth, and the increased reciprocating angle of the pedal can increase the angle of the patient's foot hooking and stretching movement. Conversely, when the first shift shaft slides radially along the gear to reduce the eccentricity of the first shift shaft, the gear rotates through the first shift shaft and the first shift groove to drive the shift rod to move back and forth, and the stroke of the reciprocating movement of the shift rod is reduced by cooperating with the second shift groove and the second shift shaft to drive the pedal to swing back and forth, and the reduced angle of the pedal reciprocating swing can reduce the angle of the patient's foot hooking and stretching movement, thereby facilitating adjustment according to the actual needs of the patient, avoiding excessive angles of foot hooking and stretching to cause injury to the patient or excessively small angles of foot hooking and stretching to fail to meet the exercise requirements, thereby improving the safety and practicality of the device.

[0014] In one embodiment, the adjustment assembly includes a first screw and a guide block; a first guide groove is provided at one end of the gear, the guide block is slidably arranged in the first guide groove along the radial direction of the gear, the first shifting shaft is arranged on the guide block, the first screw is arranged parallel to the first guide groove, and is rotatably arranged in the first guide groove and is threadedly connected with the guide block. By rotating the first screw and matching the guide block thread, the guide block can be driven to drive the first shifting shaft to move radially along the gear, and the first screw is stopped, and the first screw and the guide block thread match to form a self-locking function to fix the guide block, thereby fixing the first shifting shaft, and driving the first shifting shaft to move and fix is ​​convenient, and the eccentricity of the first shifting shaft is convenient to adjust.

[0015] In one embodiment, the plug-in assembly includes a second screw and a plug-in block; the bottom end of the placement seat is provided with multiple groups of second guide grooves corresponding to the multiple groups of resistance blocks, the plug-in block can be slidably arranged in the second guide groove along the vertical direction, the second screw is arranged in the vertical direction and can be rotatably arranged on the placement seat, the bottom end of the second screw extends into the second guide groove and is threadedly connected with the plug-in block, and a slot is arranged at the top of the resistance block, and the plug-in block can be inserted into the slot when it moves. The plug-in block is driven to move downward by rotating the second screw and the plug-in block thread, and the plug-in block can be inserted into the slot when it moves downward to connect with the resistance block. At this time, the placement seat can slide and drive the resistance block to slide through the plug-in block, and the resistance block can be driven to slide conveniently, so as to facilitate the resistance movement. The plug-in block can be driven to move upward by rotating the second screw in the opposite direction and the plug-in block thread, and the plug-in block can be withdrawn from the slot when it moves upward, thereby canceling the connection between the plug-in block and the resistance block. At this time, the placement seat does not slide and drive the resistance block to move, so as to facilitate the cancellation of the resistance movement.

[0016] In one embodiment, a mounting groove is provided at the top of the base, and a plurality of guide rods are provided in the mounting groove along the length direction of the base, and a plurality of resistance blocks are slidably provided in the mounting groove along the length direction of the base, and are respectively sleeved on the plurality of guide rods, and the compression spring is sleeved on the guide rod, and one end abuts against the resistance block and the other end abuts against the end side of the mounting groove close to the first end. By providing the mounting groove and the guide rod to limit and guide the resistance block, the sliding stability of the resistance block can be improved, and the guide rod can guide the expansion and contraction of the compression spring, thereby improving the service life of the compression spring.

[0017] In one embodiment, the exercise mechanism further includes a limit assembly, which can be slidably arranged on the base along the length direction of the base, and the placement seat can slide near the first end to abut against the limit assembly. The sliding stroke of the placement seat near the first end can be increased or decreased by sliding the limit assembly along the length direction of the base to adjust the position of the limit assembly. When the sliding stroke of the placement seat near the first end increases, the knee flexion angle of the patient's knee flexion exercise increases, and when the sliding stroke of the placement seat near the first end decreases, the knee flexion angle of the patient's knee flexion exercise decreases, which is convenient for adjustment according to the actual situation of the patient, avoiding excessive knee flexion angles that cause damage to the patient or too small knee flexion angles that fail to meet exercise requirements, thereby improving the safety and practicality of the device.

[0018] In one embodiment, the limit assembly includes a limit block and a first fixed knob; the limit block is slidably arranged on the base along the length direction of the base, the placement seat slides close to the first end portion to abut against the limit block, the first fixed knob is threadedly connected to the limit block, and the first fixed knob can be rotated to make one end of the first fixed knob abut against the base. The limit block can be fixed by sliding the limit block to a suitable position and then rotating the first fixed knob to make one end of the first fixed knob abut against the base, and the position of the limit block can be adjusted conveniently.

[0019] In one embodiment, the exercise mechanism further includes an auxiliary component, which includes a first fixing plate and a second fixing plate, one end of the first fixing plate is hinged to the first end, and the other end is hinged to one end of the second fixing plate, and the other end of the second fixing plate is hinged to the placement seat, and the placement seat slides close to the first end to drive the divergent ends of the first fixing plate and the second fixing plate to move close to each other, and the hinge between the first fixing plate and the second fixing plate moves upward away from the base. The patient places the thigh and calf on the first fixing plate and the second fixing plate respectively, and when the patient flexes his knees to make the placement seat slide close to the first end, the first fixing plate and the second fixing plate can support and limit the patient's thigh and calf, thereby improving the stability of the patient's knee flexion movement.

[0020] In one embodiment, a connecting plate is provided on the second end portion, a connecting groove is provided on the connecting plate, the connecting groove can be sleeved on the baffle at the end of the bed, a second fixing knob is threadedly connected to the connecting plate, and the second fixing knob can be rotated to make one end of the second fixing knob contact the baffle at the end of the bed, so as to facilitate fixing the device on the bed and prevent the device from moving during use. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the specific implementation of the present invention, the following will briefly introduce the drawings required for use in the specific implementation. In all the drawings, each element or part is not necessarily drawn according to the actual scale.

[0022] Figure 1 A schematic diagram of the three-dimensional structure of a lower limb exercise assistive device for severe illness rehabilitation provided by one embodiment of the present invention;

[0023] Figure 2 for Figure 1 A schematic diagram of the three-dimensional structure of a lower limb exercise assistive device for severe illness rehabilitation in another state is shown;

[0024] Figure 3 for Figure 1 An exploded view of a lower limb exercise assistive device for critical care rehabilitation is shown;

[0025] Figure 4 for Figure 1 An exploded view of an exercise mechanism in a lower limb exercise assistive device for critical care rehabilitation is shown;

[0026] Figure 5 for Figure 1 An exploded view of an adjustment component in a lower limb exercise assistive device for critical care rehabilitation is shown;

[0027] Figure 6 for Figure 1 An exploded view of a resistance mechanism in a lower limb exercise assistive device for critical illness rehabilitation is shown;

[0028] Figure 7 for Figure 6 A magnified schematic diagram of the middle A area;

[0029] Figure 8 for Figure 1 An exploded view of a limiting component in a lower limb exercise assistive device for critical care rehabilitation is shown.

[0030] Reference numerals:

[0031] 10. base; 101. first end; 102. second end; 103. mounting groove; 104. guide rod; 105. first slide groove; 106. third slide groove;

[0032] 20, a placement seat; 201, a pedal; 2011, a second shifting shaft; 2012, a first cushion; 2013, a first fixing belt; 202, a gear; 2021, a first shifting shaft; 2022, a first guide groove; 203, a rack; 204, a shifting rod; 2041, a first shifting groove; 2042, a second shifting groove; 2043, a second slider; 205, a second guide groove; 206, a first slider; 207, a second slide groove;

[0033] 30, resistance block; 301, compression spring; 302, second screw rod; 303, plug-in block; 304, slot;

[0034] 40. first screw rod; 401. guide block;

[0035] 50, limit block; 501, first fixed knob; 502, third slider;

[0036] 60, first fixing plate; 601, second fixing plate; 602, second cushion; 603, second fixing belt;

[0037] 70. Connecting plate; 701. Connecting groove; 702. Second fixing knob. DETAILED DESCRIPTION

[0038] The following embodiments of the technical solution of the present invention are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and are therefore only used as examples, and cannot be used to limit the protection scope of the present invention.

[0039] See also Figures 1 to 4 In one embodiment, a lower limb exercise assistive device for critical illness rehabilitation includes a base 10, an exercise mechanism and a resistance mechanism.

[0040] The base 10 can be placed on a hospital bed, and the base 10 includes a first end 101 and a second end 102 opposite to each other along its length direction. The exercise mechanism includes a placement seat 20, a pedal 201 and a transmission assembly. The placement seat 20 is arranged at the top of the base 10 and can slide along the length direction of the base 10. The bottom end of the pedal 201 is hinged at the top of the placement seat 20, and the foot can be fixed on the pedal 201. The transmission assembly connects the base 10, the placement seat 20 and the pedal 201 to convert the sliding of the placement seat 20 into the reciprocating swing of the pedal 201. The resistance mechanism includes a resistance block 30, a compression spring 301 and a plug-in assembly. The base 10 is provided with a plurality of groups of resistance blocks 30 for sliding along its length direction. The plurality of groups of resistance blocks 30 are respectively connected to the base 10 with compression springs 301. The compression springs 301 are used to apply a thrust to the resistance blocks 30 away from the first end 101. The placement seat 20 is provided with a plurality of groups of plug-in assemblies corresponding to the plurality of groups of resistance blocks 30. The adjustment plug-in assembly can be plugged or separated with the corresponding resistance blocks 30.

[0041] In the above embodiment, during exercise, the patient places the heel on the placement seat 20 and steps on the pedal 201 and fixes it, and then the patient actively performs knee flexion exercise, and the knee flexion exercise drives the placement seat 20 to slide close to the first end 101, and the placement seat 20 slides through the transmission component to drive the pedal 201 to swing back and forth, and the reciprocating swing of the pedal 201 can drive the foot to hook the foot and stretch the foot, so that the patient can perform multiple exercises at the same time, thereby improving the rehabilitation exercise effect of the device. When resistance exercise is needed, the plug-in component is adjusted to be plugged with the corresponding resistance block 30. When the knee flexion exercise causes the placement seat 20 to slide close to the first end 101, the placement seat 20 drives the resistance block 30 to move close to the first end 101 through the plug-in component. At this time, the compression spring 301 is compressed to generate resistance to the knee flexion exercise, and increasing or decreasing the number of groups of plug-in components and resistance blocks 30 can increase or decrease the resistance of the knee flexion exercise, which is convenient for performing resistance exercise and adjusting the resistance of resistance exercise, thereby improving the practicality of the device.

[0042] On the basis of the above embodiment, further, a mounting groove 103 is provided at the top of the base 10, and multiple groups of guide rods 104 are provided in the mounting groove 103 along the length direction of the base 10. Multiple groups of resistance blocks 30 are slidably provided in the mounting groove 103 along the length direction of the base 10, and are respectively sleeved on the multiple groups of guide rods 104. The compression spring 301 is sleeved on the guide rod 104, and one end abuts against the resistance block 30 and the other end abuts against the end side of the mounting groove 103 close to the first end 101. By providing the mounting groove 103 and the guide rod 104 to limit and guide the resistance block 30, the sliding stability of the resistance block 30 can be improved, and the guide rod 104 can guide the expansion and contraction of the compression spring 301, thereby improving the service life of the compression spring 301.

[0043] Specifically in the above embodiment, two groups of first slide grooves 105 are provided at the top of the base 10, and two groups of first sliders 206 are provided at the bottom of the placement seat 20. The two groups of first sliders 206 can be slidably arranged in the two groups of first slide grooves 105 along the length direction of the base 10. The cooperation of the two groups of first slide grooves 105 and the two groups of first sliders 206 can improve the stability of the placement seat 20 when sliding.

[0044] Specifically in the above embodiment, the top surface of the pedal 201 is provided with a first soft pad 2012, and the two sides of the pedal 201 are provided with first fixing straps 2013, and the two sets of first fixing straps 2013 are bonded by Velcro hook surface and Velcro fleece surface. The first soft pad 2012 can improve the comfort of the patient stepping on the pedal 201, and the two sets of first fixing straps 2013 can be wrapped around the patient's instep and bonded to fix the foot on the pedal 201, which is convenient for fixing the foot on the pedal 201.

[0045] See also Figure 1 and Figure 4 In one embodiment, the transmission assembly includes a gear 202, a rack 203 and a lever 204; the gear 202 is rotatably arranged on one side of the placement seat 20, the rack 203 is arranged on the base 10 along the length direction of the base 10, the gear 202 is meshed with the rack 203, the lever 204 can be slidably arranged on the placement seat 20 along the length direction of the base 10, a first shifting groove 2041 is provided at the bottom end of the lever 204, and a second shifting groove 2042 is provided at the top end, a first shifting shaft 2021 is eccentrically arranged on the gear 202, and the first shifting shaft 2021 is slidably arranged in the first shifting groove 2041, and a second shifting shaft 2011 is eccentrically arranged on one side of the pedal 201 relative to the hinge axis, and the second shifting shaft 2011 is slidably arranged in the second shifting groove 2042.

[0046] In the above embodiment, the placement seat 20 moves to drive the gear 202 to move, and the gear 202 moves to engage with the rack 203 to drive the gear 202 to rotate. The gear 202 rotates through the first shift shaft 2021 and the first shift groove 2041 to drive the shift rod 204 to move back and forth. The shift rod 204 moves back and forth through the second shift groove 2042 and the second shift shaft 2011 to drive the pedal 201 to swing back and forth, making it convenient for the pedal 201 to swing back and forth.

[0047] Specifically in the above embodiment, a second slide groove 207 is provided on one side of the placement seat 20, and a second slider 2043 is provided on the lever 204, and the second slider 2043 can be slidably arranged in the second slide groove 207 along the length direction of the base 10. The second slide groove 207 cooperates with the second slider 2043 to improve the sliding stability of the lever 204.

[0048] See also Figure 4 and Figure 5 In one embodiment, the transmission assembly further includes an adjusting assembly, and the first shift shaft 2021 is connected to the gear 202 through the adjusting assembly, and the adjusting assembly is used to drive the first shift shaft 2021 to slide radially along the gear 202.

[0049] Specifically, the adjustment component includes a first screw rod 40 and a guide block 401; a first guide groove 2022 is opened at one end of the gear 202, the guide block 401 is set in the first guide groove 2022 for radial sliding along the gear 202, the first shift shaft 2021 is set on the guide block 401, the first screw rod 40 is set parallel to the first guide groove 2022, and is rotatably set in the first guide groove 2022, and is threadedly connected to the guide block 401.

[0050] In the above embodiment, the guide block 401 can be driven to drive the first shift shaft 2021 to move radially along the gear 202 by rotating the first screw rod 40 and the guide block 401. When the first shift shaft 2021 slides radially along the gear 202 to increase the eccentricity of the first shift shaft 2021, the gear 202 rotates through the first shift shaft 2021 and the first shift groove 2041 to drive the reciprocating stroke of the shift rod 204 to increase. The reciprocating stroke of the shift rod 204 increases and the reciprocating angle of the pedal 201 is increased through the second shift groove 2042 and the second shift shaft 2011. The reciprocating angle of the pedal 201 increases, which can increase the angle of the patient's foot hooking and stretching movement. Conversely, when the first shift shaft 2021 slides radially along the gear 202 to reduce the eccentricity of the first shift shaft 2021, the gear 202 rotates through the first shift shaft 2021 and the first shift groove 2041 to drive the reciprocating stroke of the shift rod 204 to increase. The lever shaft 2021 cooperates with the first lever groove 2041 to reduce the reciprocating stroke of the lever rod 204. The reciprocating stroke of the lever rod 204 is reduced, and the reciprocating angle of the pedal 201 is reduced by cooperating with the second lever groove 2042 and the second lever shaft 2011. The reduced reciprocating angle of the pedal 201 can reduce the angle of the patient's foot hooking and foot stretching movement, thereby facilitating adjustment according to the actual needs of the patient, avoiding injuries to the patient caused by excessive foot hooking and foot stretching angles or insufficient foot hooking and foot stretching angles that fail to meet exercise requirements, thereby improving the safety and practicality of the device, and stopping the rotation of the first screw 40. The first screw 40 and the guide block 401 threaded cooperation form a self-locking function to fix the guide block 401, thereby fixing the first lever shaft 2021, and driving the first lever shaft 2021 to move and fix is ​​convenient.

[0051] See also Figure 3 , Figure 6 and Figure 7 In one embodiment, the plug-in assembly includes a second screw rod 302 and a plug-in block 303; a plurality of second guide grooves 205 are provided at the bottom end of the placement seat 20 corresponding to the plurality of resistance blocks 30, and the plug-in block 303 can be slidably arranged in the second guide groove 205 along a vertical direction, and the second screw rod 302 is arranged in a vertical direction and rotatably arranged on the placement seat 20, and the bottom end of the second screw rod 302 extends into the second guide groove 205 and is threadedly connected to the plug-in block 303, and a slot 304 is provided at the top end of the resistance block 30, and the plug-in block 303 can be moved through the slot 304.

[0052] In the above embodiment, the plug-in block 303 is driven to move downward by rotating the second screw rod 302 and the plug-in block 303 threadedly cooperate to drive the plug-in block 303 to move downward. The plug-in block 303 moves downward and can be inserted into the slot 304 to connect with the resistance block 30. At this time, the placement seat 20 can slide to drive the resistance block 30 to slide through the plug-in block 303, and the resistance block 30 is driven to slide easily, thereby facilitating the resistance movement. The plug-in block 303 is driven to move upward by rotating the second screw rod 302 and the plug-in block 303 threadedly cooperate to drive the plug-in block 303 to move upward. The plug-in block 303 moves upward and can be withdrawn from the slot 304, thereby canceling the connection between the plug-in block 303 and the resistance block 30. At this time, the placement seat 20 slides without driving the resistance block 30 to move, thereby facilitating the cancellation of the resistance movement.

[0053] See also Figure 2 and Figure 8 In one embodiment, the exercise mechanism further includes a limit assembly, which is slidably disposed on the base 10 along the length direction of the base 10, and the placement seat 20 slides near the first end 101 to abut against the limit assembly. Specifically, the limit assembly includes a limit block 50 and a first fixed knob 501; the limit block 50 is slidably disposed on the base 10 along the length direction of the base 10, and the placement seat 20 slides near the first end 101 to abut against the limit block 50, and the first fixed knob 501 is threadedly connected to the limit block 50, and rotating the first fixed knob 501 can make one end of the first fixed knob 501 abut against the base 10.

[0054] In the above embodiment, the limit block 50 can be fixed by sliding the limit block 50 to a suitable position along the length direction of the base 10, and then rotating the first fixing knob 501 so that one end of the first fixing knob 501 abuts against the base 10. It is convenient to adjust the position of the limit block 50. The sliding stroke of the placement seat 20 close to the first end 101 can be increased or decreased by adjusting the position of the limit block 50. When the sliding stroke of the placement seat 20 close to the first end 101 increases, the knee flexion angle of the patient's knee flexion exercise increases. When the sliding stroke of the placement seat 20 close to the first end 101 decreases, the knee flexion angle of the patient's knee flexion exercise decreases. It is convenient to adjust according to the actual situation of the patient, avoid excessive knee flexion angle causing injury to the patient or too small knee flexion angle failing to meet the exercise requirements, and improve the safety and practicality of the device.

[0055] Specifically in the above embodiment, a third slide groove 106 is provided on one side of the base 10, and a third slider 502 is provided on the limit block 50. The third slider 502 is slidably arranged in the third slide groove 106 along the length direction of the base 10. The third slide groove 106 cooperates with the third slider 502 to improve the sliding stability of the limit block 50.

[0056] See also Figures 1 to 3In one embodiment, the exercise mechanism further includes an auxiliary component, which includes a first fixed plate 60 and a second fixed plate 601. One end of the first fixed plate 60 is hinged to the first end 101, and the other end is hinged to one end of the second fixed plate 601. The other end of the second fixed plate 601 is hinged to the placement seat 20. The placement seat 20 slides close to the first end 101 to drive the divergent ends of the first fixed plate 60 and the second fixed plate 601 to move close to each other, and the hinge between the first fixed plate 60 and the second fixed plate 601 moves upward away from the base 10.

[0057] In the above embodiment, the patient places the thigh and calf on the first fixing plate 60 and the second fixing plate 601 respectively. When the patient flexes his knees to make the placement seat 20 slide close to the first end 101, the first fixing plate 60 and the second fixing plate 601 can support and limit the patient's thigh and calf, thereby improving the stability of the patient's knee flexion movement.

[0058] Specifically in the above embodiment, the top of the first fixing plate 60 and the second fixing plate 601 are both provided with a second soft pad 602, and the two sides of the first fixing plate 60 and the second fixing plate 601 are both provided with a second fixing belt 603, and the corresponding two sets of second fixing belts 603 are bonded by the Velcro hook surface and the Velcro fleece surface. The second soft pad 602 can improve the comfort of the patient placing the thigh and calf on the first fixing plate 60 and the second fixing plate 601, and the thigh and calf can be fixed on the first fixing plate 60 and the second fixing plate 601 by passing the corresponding two sets of second fixing belts 603 around the thigh and the calf and bonding them, so as to prevent the patient's thigh and calf from slipping off the first fixing plate 60 and the second fixing plate 601 during knee flexion exercise.

[0059] See also Figure 1 In one embodiment, a connecting plate 70 is provided on the second end portion 102, and a connecting groove 701 is provided on the connecting plate 70. The connecting groove 701 can be sleeved on the baffle at the end of the bed. A second fixing knob 702 is threadedly connected to the connecting plate 70, and rotating the second fixing knob 702 can make one end of the second fixing knob 702 abut against the baffle at the end of the bed. This facilitates fixing the device on the bed to prevent the device from moving during use.

[0060] The specific implementation of the above-mentioned lower limb exercise assistive device for severe illness rehabilitation is as follows:

[0061] During exercise, the patient places the heel on the placement seat 20 and steps on the pedal 201 and fixes it through the two sets of first fixing belts 2013. Then the patient actively performs knee flexion exercise, and the knee flexion exercise drives the placement seat 20 to slide close to the first end 101. The movement of the placement seat 20 drives the gear 202 to move. The gear 202 moves and engages with the rack 203 to drive the gear 202 to rotate. The rotation of the gear 202 drives the lever 204 to move back and forth through the first shifting shaft 2021 and the first shifting groove 2041. The lever 204 moves back and forth through the second shifting groove 2042 and the second shifting shaft 2011 to drive the pedal 201 to swing back and forth. The reciprocating swing of the pedal 201 can drive the foot to perform toe hooking and foot stretching exercises, so that the patient can perform multiple exercises at the same time. Exercise, improve the rehabilitation training effect of the device, when resistance exercise is needed, the plug-in block 303 is driven to move downward by rotating the second screw 302 and the plug-in block 303 threadedly cooperate, and the plug-in block 303 moves downward to be inserted into the slot 304 to connect with the resistance block 30. At this time, when the knee flexion movement causes the placement seat 20 to slide close to the first end 101, the placement seat 20 drives the resistance block 30 to move close to the first end 101 through the plug-in block 303. At this time, the compression spring 301 is compressed to generate resistance to the knee flexion movement, and increasing or decreasing the number of groups of the plug-in block 303 and the resistance block 30 can increase or decrease the resistance of the knee flexion movement, which is convenient for resistance exercise and adjustment of the resistance of resistance exercise, thereby improving the practicability of the device.

[0062] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. These modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be included in the scope of the claims and specification of the present invention.

Claims

1. A lower limb exercise assistive device for severe rehabilitation, characterized in that: include: A base (10) capable of being placed on a hospital bed, the base (10) comprising a first end (101) and a second end (102) opposite to each other along its length direction; An exercise mechanism comprises a placement seat (20), a pedal (201) and a transmission assembly, wherein the placement seat (20) is arranged at the top of the base (10) and can slide along the length direction of the base (10), the bottom end of the pedal (201) is hinged to the top of the placement seat (20), and the foot can be fixed on the pedal (201), and the transmission assembly connects the base (10), the placement seat (20) and the pedal (201) to convert the sliding of the placement seat (20) into the reciprocating swing of the pedal (201); and The resistance mechanism comprises a resistance block (30), a compression spring (301) and a plug-in assembly. The base (10) is provided with a plurality of groups of the resistance blocks (30) slidably along its length direction. The plurality of groups of the resistance blocks (30) are respectively connected to the base (10) with the compression spring (301). The compression spring (301) is used to apply a thrust to the resistance blocks (30) away from the first end (101). The placement seat (20) is provided with a plurality of groups of the plug-in assemblies corresponding to the plurality of groups of the resistance blocks (30). The plug-in assemblies can be plugged into or separated from the corresponding resistance blocks (30) by adjusting the plug-in assemblies.

2. The lower limb exercise assistive device for severe rehabilitation according to claim 1, characterized in that: The transmission assembly comprises a gear (202), a rack (203) and a lever (204); the gear (202) is rotatably arranged on one side of the placement seat (20); the rack (203) is arranged on the base (10) along the length direction of the base (10); the gear (202) is meshed with the rack (203); the lever (204) is slidably arranged on the placement seat (20) along the length direction of the base (10); (204) A first shifting groove (2041) is provided at the bottom end, and a second shifting groove (2042) is provided at the top end; a first shifting shaft (2021) is eccentrically provided on the gear (202); the first shifting shaft (2021) is slidably provided in the first shifting groove (2041); a second shifting shaft (2011) is eccentrically provided on one side of the pedal (201) relative to the hinge shaft; the second shifting shaft (2011) is slidably provided in the second shifting groove (2042).

3. The lower limb exercise assistive device for severe rehabilitation according to claim 2, characterized in that: The transmission assembly further comprises an adjusting assembly, through which the first shifting shaft (2021) is connected to the gear (202), and the adjusting assembly is used to drive the first shifting shaft (2021) to slide radially along the gear (202).

4. The lower limb exercise assistive device for severe rehabilitation according to claim 3, characterized in that: The adjustment assembly comprises a first screw rod (40) and a guide block (401); a first guide groove (2022) is provided at one end of the gear (202); the guide block (401) is radially slidably arranged in the first guide groove (2022) along the gear (202); the first shifting shaft (2021) is arranged on the guide block (401); the first screw rod (40) is arranged parallel to the first guide groove (2022), and is rotatably arranged in the first guide groove (2022), and is threadedly connected to the guide block (401).

5. The lower limb exercise assistive device for critical illness rehabilitation according to claim 1, characterized in that: The plug-in assembly comprises a second screw rod (302) and a plug-in block (303); a plurality of second guide grooves (205) are provided at the bottom end of the placement seat (20) corresponding to the plurality of resistance blocks (30); the plug-in block (303) can be slidably arranged in the second guide groove (205) along a vertical direction; the second screw rod (302) is arranged in a vertical direction and can be rotatably arranged on the placement seat (20); the bottom end of the second screw rod (302) extends into the second guide groove (205) and is threadedly connected to the plug-in block (303); a slot (304) is provided at the top end of the resistance block (30); the plug-in block (303) can be moved and inserted into the slot (304).

6. The lower limb exercise assistive device for critical illness rehabilitation according to claim 1, characterized in that: The top of the base (10) is provided with a mounting groove (103), and a plurality of guide rods (104) are arranged in the mounting groove (103) along the length direction of the base (10). The plurality of resistance blocks (30) are slidably arranged in the mounting groove (103) along the length direction of the base (10), and are respectively sleeved on the plurality of guide rods (104). The compression spring (301) is sleeved on the guide rod (104), and one end of the compression spring abuts against the resistance block (30) and the other end abuts against the end side of the mounting groove (103) close to the first end (101).

7. The lower limb exercise assistive device for critical illness rehabilitation according to claim 1, characterized in that: The exercise mechanism further comprises a limiting component, which is slidably arranged on the base (10) along the length direction of the base (10), and the placement seat (20) slides close to the first end (101) to abut against the limiting component.

8. The lower limb exercise assistive device for severe illness rehabilitation according to claim 7, characterized in that: The limiting assembly comprises a limiting block (50) and a first fixed knob (501); the limiting block (50) is slidably arranged on the base (10) along the length direction of the base (10); the placement seat (20) slides close to the first end (101) to abut against the limiting block (50); the first fixed knob (501) is threadedly connected to the limiting block (50); and the first fixed knob (501) can be rotated to make one end of the first fixed knob (501) abut against the base (10).

9. The lower limb exercise assistive device for critical illness rehabilitation according to claim 1, characterized in that: The exercise mechanism further comprises an auxiliary component, which comprises a first fixing plate (60) and a second fixing plate (601), wherein one end of the first fixing plate (60) is hinged to the first end portion (101), and the other end is hinged to one end of the second fixing plate (601), and the other end of the second fixing plate (601) is hinged to the placement seat (20), and the placement seat (20) slides close to the first end portion (101) to drive the divergent ends of the first fixing plate (60) and the second fixing plate (601) to move close to each other, and to move the hinged joint between the first fixing plate (60) and the second fixing plate (601) upward away from the base (10).

10. The lower limb exercise assistive device for critical illness rehabilitation according to claim 1, characterized in that: A connecting plate (70) is provided on the second end portion (102), and a connecting groove (701) is provided on the connecting plate (70), and the connecting groove (701) can be sleeved on the baffle at the rear end of the bed. A second fixing knob (702) is threadedly connected to the connecting plate (70), and rotating the second fixing knob (702) can cause one end of the second fixing knob (702) to abut against the baffle at the rear end of the bed.

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