Limb-assisted motion rehabilitation device

Abstract

This invention relates to the field of medical device technology, and more particularly to a limb-assisted movement rehabilitation device, comprising a seat with a backrest and an actuator mounted on the seat. The actuator includes an actuator component and a resistance adjustment unit for adjusting the resistance of the actuator component. The actuator component includes actuator rods symmetrically arranged on both sides of the seat, a connector connecting the actuator rods to the seat, and a resistance component mounted on the backrest. The actuator rod includes a first cylinder with one open end and a piston rod slidably and sealingly connected to the inner wall of the first cylinder. A handle is provided at the end of the piston rod extending out of the first cylinder. The connector includes a horizontal shaft and an arc-shaped block. The resistance component includes a crossbar, a second cylinder with one open end, and a second piston rod slidably and sealingly connected to the inner wall of the second cylinder. In this design, the patient can choose to perform flexion and extension or upward lifting exercises of the upper limb according to their needs, and can adjust the intensity of the training as needed.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to limb assistive movement rehabilitation devices. Background Technology

[0002] Postoperative neurosurgical patients may experience functional disorders in certain parts of their body, requiring motor rehabilitation training targeting the nervous system. Patients should actively participate in functional exercises. For patients with upper limb injuries, they should try to perform as much active training as they can while their limbs are still mobile, such as flexion and extension, and upward lifting exercises, until the function of the affected limb is restored.

[0003] Existing limb-assistive motor rehabilitation devices have limited functions. For example, Chinese Patent Publication No. CN 110711353 B discloses a limb rehabilitation training device for post-neurosurgery, including a support plate with upright plates symmetrically connected to its upper surface. A hand training mechanism is provided between the upright plates, and the hand training mechanism is connected to a transfer mechanism via a toothed belt. The transfer mechanism is connected to the upright plates via a rotary bearing, and a load-bearing mechanism is connected to the lower part of the transfer mechanism. The hand training mechanism is connected to the upright plates via a height adjustment mechanism, which includes a support crossbar, a sleeve, and a round rod. The support crossbar is fixedly connected to the upright plates, and the sleeve is connected to the middle of the support crossbar. The structure is fixedly connected, with the round rod inside and slidably connected to the sleeve. A locking nut is located on the upper side of the sleeve. A toothed belt adjustment mechanism is located on the side of the supporting crossbar. The toothed belt adjustment mechanism includes a second U-shaped plate, a second gear, and a telescopic rod. The second U-shaped plate is fixedly connected to the telescopic rod, and the second gear is located inside and movably connected to the second U-shaped plate. The telescopic rod is fixedly connected to the side surface of the supporting crossbar. A seat and a foot training mechanism are respectively located on the outer sides of both ends of the load-bearing mechanism, and the foot training mechanism is connected to the load-bearing mechanism. This prior art enables coordinated training of the upper and lower limbs; however, the training method is limited, restricting the choices of suitable rehabilitation training methods for patients with upper limb injuries and making it inconvenient for them to adjust the training intensity. Summary of the Invention

[0004] The purpose of this invention is to provide a limb-assisted motor rehabilitation device to solve the problem mentioned in the background that existing limb-assisted motor rehabilitation devices have a single training method and patients cannot choose a rehabilitation training method that suits them.

[0005] To achieve the above objectives, the basic solution of the present invention is as follows:

[0006] A limb-assisted motor rehabilitation device includes a seat with a backrest and an actuator mounted on the seat. The actuator includes an actuation component and a resistance adjustment unit for adjusting the resistance of the actuation component. The actuation component includes actuation rods symmetrically arranged on both sides of the seat, a connector connecting the actuation rods to the seat, and a resistance element mounted on the backrest. Each actuation rod includes a cylinder with one open end and a piston rod slidably and sealingly connected to the inner wall of the cylinder. A handle is provided at the end of the piston rod extending out of the cylinder. The connector includes a horizontal shaft and an arc-shaped block. A first end of the horizontal shaft is fixedly connected to the seat, and a second end is rotatably connected to the outer wall of the cylinder. The arc-shaped block is fixedly connected to the backrest, and its upper edge is aligned with the water... A circular arc groove is provided through the arc-shaped block in a direction parallel to the axis of the horizontal shaft, and the center of the circular arc groove is located on the axis of the horizontal shaft; the resistance component includes a crossbar, a second cylinder with one open end, and a second piston rod that is slidably and sealingly connected to the inner wall of the second cylinder. The crossbar is horizontally arranged, and its two ends pass through the circular arc groove on the arc-shaped block on both sides of the seat. The bottom of one cylinder is hinged to one end of the crossbar, and the bottom of the other cylinder is hinged to the other end of the crossbar. The open end of the second cylinder faces upward, and the bottom of the second cylinder is hinged to the lower part of the backrest. The outer end of the second piston rod is hinged to the middle part of the crossbar; the resistance adjustment unit is sealed and connected to the inner cavity of the first cylinder and the inner cavity of the second cylinder to adjust the resistance encountered by the first piston rod and the second piston rod when sliding.

[0007] In the above scheme, the patient sits on the backrest of the chair, holds the handles on the actuator rods on both sides of the chair with both hands, and exercises by bending and stretching the arms back and forth along the body to make piston rod one slide inside cylinder one. The patient can also lift or press the handles up or down to make cylinder one rotate around the horizontal axis. At this time, the crossbar slides down along the arc groove to force piston rod two to slide inside cylinder two. The resistance adjustment unit adjusts the resistance encountered by piston rod one and piston rod two when they slide, so as to achieve the purpose of training the patient's upper limbs.

[0008] Compared with existing technologies, patients can choose to perform upper limb flexion and extension or upward lifting exercises according to their own needs in the above program, and can adjust the intensity of the training as needed.

[0009] Furthermore, the resistance adjustment unit includes a cylindrical section 3 with one open end. The opening of the cylindrical section 3 is vertically disposed at the bottom of the seat, and the closed end of the cylindrical section 3 is fixedly connected to the seat. A transverse slide with a square cavity is disposed on the inner wall of the cylindrical section 3 in a radial direction. A slider is disposed in the transverse slide and is slidably connected to the inner wall of the transverse slide. An airflow channel is formed between the slider and the inner wall of the cylindrical section 3. A transmission rod is disposed on the cylindrical section 3 in an axial direction along the transverse slide. The inner end of the transmission rod passes through the slider and is rotatably connected to the side wall of the cylindrical section 3. The transmission rod located inside the cylindrical section 3 is provided with an external thread, and the slider is provided with an internal thread that mates with the thread of the transmission rod. The outer end of the transmission rod extends out of the cylindrical section 3. The inner cavity of the closed end of the cylindrical section 1 is connected to the inner cavity of the closed end of the cylindrical section 3 through an air pipe 1, and the inner cavity of the closed end of the cylindrical section 2 is connected to the inner cavity of the closed end of the cylindrical section 3 through an air pipe 2.

[0010] Furthermore, the outer wall of the cylinder three is integrally formed with a protrusion along the radial direction of the cylinder three, and the transverse slide is arranged along the axial direction of the protrusion.

[0011] Furthermore, the resistance adjustment unit also includes a drive pulley located in front of the seat and a driven pulley fixedly connected to the outer end of the transmission rod. The drive pulley and the driven pulley are connected by a belt drive. The drive pulley is rotatably mounted on a U-shaped wheel seat, and a foot pedal for driving the drive pulley to rotate is provided on the drive pulley.

[0012] Furthermore, the diameter of the driving pulley is smaller than the diameter of the driven pulley.

[0013] Furthermore, the length and width of the transverse slide are both greater than the inner diameter of the cylinder three, so that the slider can block the airflow channel.

[0014] Furthermore, the outer end of the transmission rod is rotatably connected to the seat.

[0015] Compared with the prior art, the present invention has at least the following beneficial effects:

[0016] 1. When using this program, patients can choose to perform upper limb flexion and extension or upward lifting exercises according to their own needs.

[0017] 2. This method allows for easy adjustment of training intensity by stepping on the foot pedals with both feet. The intensity can be adjusted at will.

[0018] 3. When using this device for training, the resistance force is smaller when the patient performs the training movements slowly, and larger when the patient performs the training movements quickly. The patient can choose the speed of the movements during training according to their own situation. Attached Figure Description

[0019] The accompanying drawings, which are provided to further illustrate this application and form part of this application, illustrate exemplary embodiments of this application and are used to explain this application, but do not constitute an undue limitation of this application.

[0020] In the attached diagram:

[0021] Figure 1 This is a structural schematic diagram of the present invention from the main view direction.

[0022] Figure 2 This is a top-view structural diagram of the present invention.

[0023] Figure 3 This is a schematic diagram of the cylinder three combined with the seat in the left view direction.

[0024] Figure 4 This is a schematic diagram of the external structure of the cylindrical tube from a top-down view.

[0025] Figure 5 This is a schematic diagram of the internal structure of the cylindrical tube from a top-down view.

[0026] Figure 6 This is a schematic diagram of the internal structure of the cylindrical tube from the left-hand view.

[0027] Figure 7 This is a schematic diagram of the actuator.

[0028] The meanings of the labels in the attached diagram are as follows:

[0029] Seat 10, backrest 101, actuator 20, cylinder 1 201, piston rod 1 202, retaining ring 1 203, handle 204, air pipe 1 205, horizontal shaft 301, arc block 302, arc groove 303, cylinder 2 401, piston rod 2 402, crossbar 403, air pipe 2 404, cylinder 3 501, transverse slide 502, slider 503, transmission rod 504, protrusion 505, driving pulley 506, driven pulley 507, belt 508, U-shaped wheel seat 509, foot pedal 5010, airflow channel 5011. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions of this application will be clearly and completely described below in conjunction with specific embodiments and corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0031] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0032] The limb-assisted motor rehabilitation device of this embodiment, such as Figure 1 , Figure 2 As shown, the device includes a seat 10 with a backrest 101 and an actuator disposed on the seat 10. The actuator includes an actuator component and a resistance adjustment unit for adjusting the resistance of the actuator component. The actuator component includes actuator rods 20 symmetrically disposed on both sides of the seat 10, a connector connecting the actuator rods 20 to the seat 10, and a resistance component disposed on the backrest 101.

[0033] Combination Figure 7 As shown, the actuator 20 includes a cylinder 201 with one open end and a piston rod 202 that is slidably and sealingly connected to the inner wall of the cylinder 201. The piston rod 202 is a stepped rod. A retaining ring 203 is provided at the open end of the cylinder 201 to prevent the piston rod 202 from sliding out of the cylinder 201. The retaining ring 203 is fixedly connected to the open end face of the cylinder 201 by screws. A handle 204 is provided at the end of the piston rod 202 that extends out of the cylinder 201. Figure 1 , Figure 2 As shown, the connector includes a horizontal shaft 301 and an arc-shaped block 302. The horizontal shaft 301 is horizontally arranged, and its axis is perpendicular to the axis of the cylinder 201. The first end of the horizontal shaft 301 is fixedly connected to the seat 10, and the second end of the horizontal shaft 301 is rotatably connected to the outer wall of the cylinder 201, allowing the cylinder to rotate around the axis of the horizontal shaft 301. The arc-shaped block 302 is fixedly connected to the backrest 101. An arc groove 303 is provided on the arc block 302 along a direction parallel to the axis of the horizontal shaft 301, and the center of the arc groove 303 is located on the axis of the horizontal shaft 301.

[0034] like Figure 1 , Figure 2As shown, the resistance component includes a crossbar 403, a cylindrical second 401 with one open end, and a piston rod 402 that is slidably and sealingly connected to the inner wall of the cylindrical second 401. Similar to the structure of the actuator 20, the piston rod 402 is a stepped rod. A retaining ring 2 is provided at the open end of the cylindrical second 401 to prevent the piston rod 402 from sliding out of the cylindrical second 401. The retaining ring 2 is fixedly connected to the open end face of the cylindrical second 401 by screws. The crossbar 403 is horizontally arranged, and its two ends pass through the arc grooves 303 on the arc blocks 302 on both sides of the seat 10. The bottom of one cylindrical first 201 is hinged to one end of the crossbar 403, and the bottom of the other cylindrical first 201 is hinged to the other end of the crossbar 403. The open end of the second cylinder 401 faces upward, the bottom of the second cylinder 401 is hinged to the lower part of the backrest 101, and the outer end of the second piston rod 402 is hinged to the middle part of the crossbar 403.

[0035] The closed end cavities of both cylinder 201 and cylinder 401 are sealed and connected to the resistance adjustment unit to adjust the resistance encountered by piston rod 202 and piston rod 402 during sliding. Specifically, as... Figure 1 , Figure 3 , Figure 4 , Figure 5 , Figure 6 As shown, the resistance adjustment unit includes a cylindrical section 501 with one open end. The cylindrical section 501 is vertically positioned at the bottom of the seat 10 with its opening facing downwards. The closed end of the cylindrical section 501 is fixedly connected to the seat 10. A protrusion 505 is integrally formed on the outer wall of the cylindrical section 501 along its radial direction. A transverse slide 502 with a square cavity is arranged on the inner wall of the cylindrical section 501 along its radial direction. The length and width of the transverse slide 502 are both greater than the inner diameter of the cylindrical section 501. The transverse slide 502 is arranged axially along the protrusion 505. A slider 503 is provided inside the transverse slide 502 and is slidably and sealingly connected to the inner wall of the transverse slide 502. Figure 5 , Figure 6As shown, an airflow channel 5011 is formed between the slider 503 and the inner wall of the cylindrical three 501. The slider 503 can change the size of the airflow channel 5011 and block it by sliding within the transverse slide 502. A transmission rod 504 is provided on the cylindrical three 501 along the axial direction of the transverse slide 502. The inner end of the transmission rod 504 passes through the slider 503 and is rotatably connected to the side wall of the cylindrical three 501. The outer end of the transmission rod 504 is rotatably connected to the seat 10. The transmission rod 504 located inside the third cylinder 501 is provided with an external thread, and the slider 503 is provided with an internal thread that engages with the transmission rod 504. The outer end of the transmission rod 504 extends out of the third cylinder 501. The inner cavity of the closed end of the first cylinder 201 is sealed and connected to the inner cavity of the closed end of the third cylinder 501 through a flexible air pipe 205. The inner cavity of the closed end of the second cylinder 401 is sealed and connected to the inner cavity of the closed end of the third cylinder 501 through a flexible air pipe 404.

[0036] The resistance adjustment unit further includes a drive pulley 506 disposed in front of the seat 10 and a driven pulley 507 coaxially fixedly connected to the outer end of the transmission rod 504. The diameter of the drive pulley 506 is smaller than the diameter of the driven pulley 507. The drive pulley 506 and the driven pulley 507 are connected by a belt 508. The drive pulley 506 is rotatably mounted on a U-shaped wheel seat 509 via a rotating shaft. A foot pedal 5010 for driving the drive pulley 506 to rotate is disposed on the drive pulley 506.

[0037] When using this method, the patient sits on the backrest 101 of the seat 10, and holds the handles 204 on the actuator rods 20 on both sides of the seat 10. The patient flexes and extends their arms forward and backward, causing the piston rod 202 to slide inside the cylinder 201. As the piston rod 202 slides inside the cylinder 201, the gas inside the closed end of the cylinder 201 flows through the trachea 205 and then through the airflow channel 5011 formed between the slider 503 and the inner wall of the cylinder 501, allowing it to circulate with the external airflow. Alternatively, the patient can pull up or press down on the handles 204 to rotate the cylinder 201 around the horizontal axis 301. At this time, the crossbar 403 slides downward along the arc groove 303, forcing the piston rod 402 to slide inside the cylinder 401. When piston rod 202 slides inside cylinder 201, the gas inside the closed end of cylinder 201 flows through trachea 204 and then through the airflow channel formed between slider 503 and the inner wall of cylinder 301 to the external space. The patient can drive the active pulley 506 to rotate by stepping on the pedal with both feet, and drive the driven pulley 507 to rotate through belt 508, so that the transmission rod 504 rotates. The rotation of transmission rod 504 forces slider 503 to slide in transverse slide 502 to adjust the gap between slider 503 and the inner wall of cylinder 301, thereby changing the size of the airflow channel inside cylinder 301. This adjusts the resistance encountered by piston rod 102 and piston rod 202 when they slide, thus adjusting the training intensity.

[0038] Compared with the prior art, the present invention has at least the following beneficial effects:

[0039] 1. When using this program, patients can choose to perform upper limb flexion and extension or upward lifting exercises according to their own needs.

[0040] 2. This method allows for adjustment of training intensity by stepping on the foot pedals with both feet. The adjustment is convenient and allows for easy and flexible adjustment of the training intensity.

[0041] 3. During training using this device, once the size of the airflow channel within the inner cavity of cylinder 3 (501) is determined, when the patient performs training movements slowly, the sliding speed of piston rod 1 (202) and piston rod 2 (402) is relatively slow, resulting in a slow airflow velocity through the airflow channel 5011 within cylinder 3 (501). Therefore, piston rod 1 (202) and piston rod 2 (402) experience less resistance. When the patient performs training movements quickly, the sliding speed of piston rod 1 (202) and piston rod 2 (402) is relatively fast, resulting in a fast airflow velocity through the airflow channel 5011 within cylinder 3 (501). Therefore, piston rod 1 (202) and piston rod 2 (402) experience greater resistance. Thus, in this scheme, in addition to changing the training intensity by stepping on the foot pedal 5010 with both feet, the patient can also choose the speed of movement during training according to their own situation to autonomously change the training intensity, achieving the goal of reasonable upper limb rehabilitation training.

[0042] The above are merely embodiments of the present invention, and common knowledge regarding specific structures and characteristics in the solutions is not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the structure of the present invention, and these should also be considered within the scope of protection of the present invention. These modifications and improvements will not affect the effectiveness of the implementation of the present invention or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A limb-assisted motor rehabilitation device, comprising a seat with a backrest and an actuator disposed on the seat, characterized in that: The actuator includes an actuator component and a resistance adjustment unit for adjusting the resistance of the actuator component. The actuator component includes actuator rods symmetrically arranged on both sides of the seat, a connector connecting the actuator rods to the seat, and a resistance component disposed on the backrest. The actuator rod includes a cylinder with one open end and a piston rod that is slidably and sealingly connected to the inner wall of the cylinder. A handle is provided at the end of the piston rod that extends out of the cylinder. The connector includes a horizontal shaft and an arc-shaped block. The first end of the horizontal shaft is fixedly connected to the seat, and the second end of the horizontal shaft is rotatably connected to the outer wall of the cylinder. The arc-shaped block is fixedly connected to the backrest. An arc groove is provided on the arc block along a direction parallel to the axis of the horizontal shaft, and the center of the arc groove is located on the axis of the horizontal shaft. The resistance component includes a crossbar, a cylindrical part II with one open end, and a piston rod II that is slidably and sealingly connected to the inner wall of the cylindrical part II. The crossbar is horizontally arranged, and its two ends pass through the arc grooves on the arc blocks on both sides of the seat. The bottom of one cylindrical part II is hinged to one end of the crossbar, and the bottom of the other cylindrical part II is hinged to the other end of the crossbar. The open end of the cylindrical part II is facing upward, and the bottom of the cylindrical part II is hinged to the lower part of the backrest. The outer end of the piston rod II is hinged to the middle part of the crossbar. The resistance adjustment unit includes a cylindrical section 3 with one open end. The opening of the cylindrical section 3 is vertically positioned at the bottom of the seat, and the closed end of the cylindrical section 3 is fixedly connected to the seat. A transverse slide with a square cavity is arranged radially on the inner wall of the cylindrical section 3. A slider is arranged inside the transverse slide and is slidably connected to the inner wall of the transverse slide. An airflow channel is formed between the slider and the inner wall of the cylindrical section 3. A transmission rod is arranged on the cylindrical section 3 along the axial direction of the transverse slide. The inner end of the transmission rod passes through the slider and is rotatably connected to the side wall of the cylindrical section 3. The transmission rod located inside the cylindrical section 3 is provided with an external thread, and the slider is provided with an internal thread that mates with the thread of the transmission rod. The outer end of the transmission rod extends out of the cylindrical section 3. The inner cavity of the closed end of the cylindrical section 1 is connected to the inner cavity of the closed end of the cylindrical section 3 through an air pipe 1. The inner cavity of the closed end of the cylindrical section 2 is connected to the inner cavity of the closed end of the cylindrical section 3 through an air pipe 2. The resistance adjustment unit also includes a drive pulley located in front of the seat and a driven pulley fixedly connected to the outer end of the transmission rod. The drive pulley and the driven pulley are connected by a belt drive. The drive pulley is rotatably mounted on a U-shaped wheel seat, and a foot pedal for driving the drive pulley to rotate is provided on the drive pulley.

2. The limb-assisted motor rehabilitation device according to claim 1, characterized in that: The outer wall of the cylinder three has a protrusion integrally formed along the radial direction of the cylinder three, and the transverse slide is arranged along the axial direction of the protrusion.

3. The limb-assisted motor rehabilitation device according to claim 2, characterized in that: The diameter of the driving pulley is smaller than the diameter of the driven pulley.

4. The limb-assisted motor rehabilitation device according to claim 1, characterized in that: The length and width of the transverse slide are both greater than the inner diameter of the cylinder three, so that the slider can block the airflow channel.

5. The limb-assisted motor rehabilitation device according to claim 1, characterized in that: The outer end of the transmission rod is rotatably connected to the seat.

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