Rehabilitation chair leg part support adjusting structure

Abstract

The utility model discloses a rehabilitation chair leg part support adjusting structure relates to rehabilitation chair technical field, including support plate, telescopic support, locking mechanism, support plate is located below seat area's front side, and support plate is used for and shank contact, telescopic support rear end swing rotation is hinged on connecting rod, and support plate up and down swing rotation is hinged on telescopic support front end, and telescopic support can swing and unfold and lengthen or swing and fold and shorten, and its swing can drive support plate forward movement, and drive support plate upswing, and its swing can drive support plate backward movement, and drive support plate downswing, and locking mechanism includes lock bar and locking piece, and lock bar front end connects telescopic support, and telescopic support swing drives lock bar forward movement, and its swing drives lock bar backward movement, and locking piece includes the locking plate of swing, and locking plate has through -hole, and lock bar passes through through -hole, and locking plate swing drives through -hole swing, and makes through -hole and lock bar dead lock, and locking plate swing drives through -hole swing to unlock lock bar's backward movement. The utility model satisfies user's use demand.

Description

Technical Field

[0001] This utility model relates to the field of rehabilitation chair technology, and in particular to a leg support adjustment structure for a rehabilitation chair. Background Technology

[0002] Current rehabilitation chairs have leg supports that cannot move forward or backward or swing up and down, failing to support the user's lower legs to swing to the appropriate angle. This results in the user's lower legs not being able to maintain a comfortable angle on the rehabilitation chair, thus failing to meet the user's needs and reducing the user experience. Utility Model Content

[0003] The purpose of this invention is to provide a leg support adjustment structure for a rehabilitation chair that can support the user's lower legs to swing up and down to a suitable angle, thereby meeting the user's needs.

[0004] To achieve the above objectives, the solution of this utility model is as follows:

[0005] A leg support adjustment structure for a rehabilitation chair includes a seating area for a person to sit on and connecting rods extending horizontally and vertically below the seating area. The leg support adjustment structure comprises a support plate, a telescopic bracket, and a locking mechanism. The support plate is located below and in front of the seating area, contacting the lower leg of the person when seated. The rear end of the telescopic bracket is hinged to the connecting rod for forward and backward rotation, while the support plate is hinged to the front end of the telescopic bracket for vertical rotation. The telescopic bracket can extend forward or fold backward. When extended forward, it moves the support plate forward and causes its lower end to swing upward, supporting the upward swing of the lower leg. When folded backward, it moves the support plate backward and causes its lower end to swing downward, supporting the upward swing of the lower leg. The mechanism includes a locking rod and a locking element. The front end of the locking rod is connected to the front end of the telescopic bracket. When the telescopic bracket swings forward, it causes the locking rod to move forward. When the telescopic bracket swings backward, it causes the locking rod to move backward. The locking element is located at the rear end of the telescopic bracket and includes a locking plate that can swing back and forth. The locking plate has a through hole. The rear end of the locking rod extends backward through the through hole. When the locking plate swings backward, it causes the through hole to swing backward, making the through hole and the locking rod cross-tilt so that the bottom side of the through hole and the bottom wall of the locking rod abut and lock. While locking the backward movement of the locking rod, locking the telescopic bracket to fold and shorten. When locking the forward movement of the locking plate, it causes the through hole to swing forward, making the through hole and the locking rod gradually perpendicular and making the bottom wall of the through hole and the bottom wall of the locking rod gradually parallel, thereby unlocking the backward movement of the locking rod and unlocking the folding and shortening of the telescopic bracket.

[0006] Furthermore, the telescopic support includes a first arm and a second arm. The front end of the first arm is hinged to the upper end of the support plate, and the rear end of the first arm is hinged to the rear side of the connecting rod. The front end of the second arm is hinged to the middle of the support plate, and the rear end of the second arm is hinged to the front side of the connecting rod. The first arm and the second arm are cross-hinged. Both the first arm and the second arm can swing forward to extend or swing backward to shorten. When the first arm swings forward to extend, it can move the support plate forward and cause the second arm to swing forward to extend. When the second arm swings forward to extend, it can support the lower end of the support plate to swing upward about the hinge point at the front end of the first arm. When the first arm swings backward to shorten, it can move the support plate backward and cause the second arm to swing backward to shorten. When the second arm swings backward to shorten, it can cause the lower end of the support plate to swing downward about the hinge point at the front end of the first arm.

[0007] Furthermore, the first support arm includes a first movable rod and a second movable rod. The first movable rod extends vertically, with its upper end hinged to the rear side of the mounting base, and its lower end swinging back and forth about the hinge point. The second movable rod extends forward and backward, with its front end hinged to the lower end of the first movable rod and its rear end hinged to the upper end of the support plate. The second support arm includes a third movable rod and a fourth movable rod. The third movable rod extends vertically, with its upper end hinged to the front side of the mounting base, and its lower end swinging back and forth about the hinge point. The fourth movable rod extends forward and backward in an arc shape, forming an upwardly arched arc, with its front end hinged to the third movable rod. The lower end of the movable rod is hinged to the middle of the support plate, and the middle of the third movable rod and the middle of the second movable rod are cross-hinged. When the first movable rod swings forward, it can drive the second movable rod to move forward, so that the first support arm can swing forward and extend, thereby pushing the support plate forward. When the second movable rod moves forward, it can drive the lower end of the third movable rod to swing forward. The lower end of the third movable rod swings forward, thereby driving the front end of the fourth movable rod to move forward and lift upward, so that the second support arm can swing forward and extend, thereby supporting the lower end of the support plate upward, and thus supporting the upward swing of the human lower leg.

[0008] Furthermore, a mounting base is fixedly sleeved on the connecting rod, the rear end of the first arm is hinged to the rear side of the mounting base, and the rear end of the second arm is hinged to the front side of the mounting base.

[0009] Furthermore, there are two support plates, arranged alternately on the left and right, corresponding to the left and right lower legs of the human body, respectively. Each support plate is connected to a telescopic bracket, and the two telescopic brackets are arranged alternately on the left and right. Each telescopic bracket has two first arms and two second arms. The two first arms of each telescopic bracket are spaced apart on the left and right, and the two second arms are spaced apart on the left and right. A locking member is hinged between the rear ends of the two first arms and swings back and forth. A fixed rod is provided between the front ends of the two second arms. The front end of a locking rod is hinged to the fixed rod. There are two mounting seats, arranged alternately on the connecting rod. The two first arms and two second arms of each telescopic bracket are hinged to the same mounting seat.

[0010] Furthermore, it also includes a control structure, which controls the forward and backward rotation of the locking plate, thereby locking or unlocking the backward movement of the locking lever.

[0011] Furthermore, the control structure includes a handle, a pull cable, and an elastic element. The handle is hinged to the left and right ends of the connecting rod for up-and-down rotation. One end of the pull cable is connected to the control handle, and the other end is connected to the locking plate. Under the action of external force, the control handle is rotated upward, which can pull the locking plate forward through the pull cable, causing the locking plate to swing forward and unlocking the backward movement of the locking rod. The elastic element is used to elastically push the locking plate backward. After the external force disappears, the elastic element can elastically push the locking plate backward, causing the locking plate to swing backward and locking the backward movement of the locking rod.

[0012] Furthermore, the locking component also includes a housing with an installation space inside. The housing is hinged to the rear end of the telescopic bracket, allowing it to swing back and forth. Two clamping posts with a front-to-back gap are fixedly installed at the upper end of the installation space. The upper end of the locking plate is clamped between the two clamping posts to hold the locking plate within the installation space. The lower end of the locking plate can swing back and forth about the clamping point. Openings are provided in the middle of the left and right side walls of the installation space. The elastic element is a spring, which is sleeved on the rear end of the locking rod and located inside the opening. One end of the spring abuts against the front side wall of the locking plate, and the other end abuts against the front side wall of the openings on the left and right side walls of the installation space, so that the spring is compressed when the locking plate swings forward. The pull wire is fixed to the lower end of the locking plate.

[0013] After adopting the above solution, the beneficial effects of this utility model are as follows:

[0014] The telescopic bracket of this invention can swing forward and extend, thereby moving the support plate forward and causing the lower end of the support plate to swing upward to support the user's lower leg to swing upward. After the user's lower leg swings upward at a suitable angle, the locking plate of the locking member can swing backward, causing the through hole to swing backward, so that the through hole and the locking rod cross and tilt, and the bottom side of the through hole and the bottom wall of the locking rod abut and lock. At the same time as the locking rod moves backward, the telescopic bracket locks and folds backward to shorten, so that the support plate can be maintained in this position and support the user's lower leg to maintain the swing angle at this time, thereby meeting the user's needs and optimizing the user experience. Furthermore, this invention, by using structural improvements to control the up-and-down swing and forward-and-backward movement of the support plate, is more stable and energy-saving compared to the existing technology that directly uses components such as cylinders and electric cylinders for control. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of the leg support adjustment structure of this utility model installed on a rehabilitation chair;

[0016] Figure 2 This is a schematic diagram of the specific structure of the leg support adjustment structure of this utility model;

[0017] Figure 3 This is a right view of the leg support adjustment structure of this utility model extending below the seating area to support the upward swing of the human lower leg;

[0018] Figure 4 This is a schematic diagram of the locking rod of the locking component of this utility model;

[0019] Figure 5 This is a schematic diagram of the internal structure of the locking rod of the locking component of this utility model;

[0020] Figure 6 This is a right view of the leg support adjustment structure of this utility model retracting below the seating area and relaxing the support for the human lower legs.

[0021] Figure 7 This is a schematic diagram of the locking mechanism and unlocking lever of this utility model;

[0022] Figure 8 This is a schematic diagram of the internal structure of the locking mechanism unlocking lever of this utility model.

[0023] Label Explanation:

[0024] 1. Support and adjustment structure; 10. Rehabilitation chair; 11. Seating area; 12. Linkage rod; 121. Mounting base; 20. Support plate; 30. Telescopic bracket; 31. First support arm; 311. First movable rod; 312. Second movable rod; 32. Second support arm; 321. Third movable rod; 322. Fourth movable rod; 323. Fixed rod; 40. Locking mechanism; 41. Locking rod; 42. Locking element; 421. Housing; 4211. Opening; 4212. Clamping post; 422. Locking plate; 423. Through hole; 50. Control structure; 51. Handle; 52. Spring. Detailed Implementation

[0025] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0026] like Figures 1 to 8 As shown, this utility model provides a leg support adjustment structure 1 for a rehabilitation chair 10. The rehabilitation chair 10 has a seating area 11 for a person to sit on and a connecting rod 12 extending left and right below the seating area 11. The leg support adjustment structure 1 includes a support plate 20, a telescopic bracket 30, and a locking mechanism 40. The support plate 20 is located on the lower front side of the seating area 11, and when a person sits on the seating area 11, the support plate 20 contacts the person's lower leg. The rear end of the telescopic bracket 30 is hinged to the connecting rod 12 for forward and backward rotation, and the support plate 20 is hinged to the front end of the telescopic bracket 30 for vertical rotation. The telescopic bracket 30 can be extended forward or folded backward. When extended forward, it can move the support plate 20 forward and cause the lower end of the support plate 20 to swing upward, supporting the upward swing of the person's lower leg. When the telescopic bracket 30 is folded backward, it can move the support plate 20 backward and cause the lower end of the support plate 20 to swing downward, allowing the person's lower leg to swing downward. The locking mechanism... 40 includes a locking rod 41 and a locking element 42. The front end of the locking rod 41 is connected to the front end of the telescopic bracket 30. When the telescopic bracket 30 swings forward, it causes the locking rod 41 to move forward. When the telescopic bracket 30 swings backward, it causes the locking rod 41 to move backward. The locking element 42 is located at the rear end of the telescopic bracket 30. The locking element 42 includes a locking plate 422 that can swing back and forth. The locking plate 422 has a through hole 423. The rear end of the locking rod 41 extends backward through the through hole 423. When the locking plate 422 swings backward, it causes the locking rod 41 to move backward. The through hole 423 swings backward, causing the through hole 423 and the locking rod 41 to cross and tilt, so that the bottom side of the through hole 423 and the bottom wall of the locking rod 41 abut and lock. While locking the locking rod 41 moves backward, locking the telescopic bracket 30 swings backward and folds and shortens. The locking plate 422 swings forward, causing the through hole 423 to swing forward, so that the through hole 423 and the locking rod 41 gradually become perpendicular, and the bottom wall of the through hole 423 and the bottom wall of the locking rod 41 gradually become parallel, so as to unlock the backward movement of the locking rod 41 and unlock the telescopic bracket to swing backward and shorten.

[0027] Preferred, such as Figure 3 , Figure 6As shown, the telescopic support 30 includes a first arm 31 and a second arm 32. The front end of the first arm 31 is hinged to the upper end of the support plate 20, and the rear end of the first arm 31 is hinged to the rear side of the connecting rod 12. The front end of the second arm 32 is hinged to the middle of the support plate 20, and the rear end of the second arm 32 is hinged to the front side of the connecting rod 12. The first arm 31 and the second arm 32 are cross-hinged. Both the first arm 31 and the second arm 32 can swing forward to extend or swing backward to fold and shorten. The first arm 31 swings forward to extend... When the first arm 31 swings forward, it can move the support plate 20 forward and cause the second arm 32 to swing forward and extend. When the second arm 32 swings forward and extends, it can support the lower end of the support plate 20 to swing upward about the hinge point at the front end of the first arm 31. When the first arm 31 swings backward and folds back, it can move the support plate 20 backward and cause the second arm 32 to swing backward and fold back. When the second arm 32 swings backward and folds back, it can cause the lower end of the support plate 20 to swing downward about the hinge point at the front end of the first arm 31.

[0028] like Figure 2 As shown, a mounting base 121 is fixedly sleeved on the connecting rod 12, the rear end of the first support arm 31 is hinged to the rear side of the mounting base 121, and the rear end of the second support arm 32 is hinged to the front side of the mounting base 121.

[0029] like Figure 3 , Figure 6As shown, preferably, the first support arm 31 includes a first movable rod 311 and a second movable rod 312. The first movable rod 311 extends vertically, with its upper end hinged to the rear side of the mounting base 121, and its lower end swinging back and forth about the hinge point. The second movable rod 312 extends forward and backward, with its front end hinged to the lower end of the first movable rod 311 and its rear end hinged to the upper end of the support plate 20. The second support arm 32 includes a third movable rod 321 and a fourth movable rod 322. The third movable rod 321 extends vertically, with its lower end swinging back and forth about the hinge point. The upper end of rod 321 is hinged to the front side of mounting base 121, and its lower end swings back and forth about the hinge point. The fourth movable rod 322 extends in an arc shape and arches upwards. Its front end is hinged to the lower end of the third movable rod 321, and its rear end is hinged to the middle of the support plate 20. The middle of the third movable rod 321 and the middle of the second movable rod 312 are cross-hinged. When the first movable rod 311 swings forward, it can drive the second movable rod 312 to move forward, so that the first support arm 31 swings forward, unfolds, and extends. When the support plate 20 is pushed forward, the lower end of the third movable rod 321 swings forward as the second movable rod 312 moves forward. This forward swing of the lower end of the third movable rod 321 causes the front end of the fourth movable rod 322 to move forward and lift upward, so that the second support arm 32 swings forward and extends, thereby supporting the lower end of the support plate 20 upward. This allows the lower end of the support plate 20 to swing upward around its upper end and the hinge point of the second movable rod 312, thus supporting the upward swing of the lower leg. It can be understood that the middle part of the second movable rod 312 can also be hinged to any position below the middle part of the third movable rod 321, making it easier for the second movable rod 312 to drive the third movable rod 321 to swing forward with less effort. Specifically, the fixed rod 323 is set at a position slightly below the middle of the fourth movable rod 322. Specifically, the third movable rod 321 extends forward first and then downward. Specifically, the middle part of the second movable rod 312 and the position slightly below the middle of the third movable rod 321 are cross-hinged.

[0030] like Figure 1 , Figure 2As shown, preferably, there are two support plates 20, which are arranged alternately on the left and right sides, corresponding to the left and right lower legs of the human body, respectively. Each support plate 20 is connected to a telescopic bracket 30, and the two telescopic brackets 30 are arranged alternately on the left and right sides. Each telescopic bracket 30 has two first arms 31 and two second arms 32. The two first arms 31 and the two second arms 32 of each telescopic bracket 30 are spaced apart on the left and right sides. A locking member 42 is hinged between the rear ends of the two first arms 31 and between the front ends of the two second arms 32. Specifically, the fixing rod 323 extends to the left and right, and its two ends are fixed to the two first arms 31 respectively. The front end of a locking rod 41 is hinged to the fixing rod 323. There are two mounting bases 121. Mounting seats 121 are arranged at intervals on the connecting rod 12. The two first arms 31 and two second arms 32 of each telescopic bracket 30 are hinged to the same mounting seat 121. Specifically, the rear ends of the two first arms 31 of each telescopic bracket 30 are arranged at intervals on the rear side of the mounting seat 121. The rear ends of the two first arms 31 can be hinged to the rear side of the mounting seat 121 simultaneously using the same hinge shaft, or they can be hinged separately using a hinge shaft. The rear ends of the two second arms 32 of each telescopic bracket 30 are arranged at intervals on the front side of the mounting seat 121. The rear ends of the two second arms 32 can also be hinged to the front side of the mounting seat 121 simultaneously using the same hinge shaft, or they can be hinged separately using a hinge shaft. Preferably, a single hinge shaft is used.

[0031] Furthermore, it also includes a control structure 50, which controls the forward and backward rotation of the locking plate 422, thereby locking or unlocking the backward movement of the locking lever 41.

[0032] like Figures 2-8 As shown, preferably, the control structure 50 includes a handle 51, a pull cable (not shown in the figure), and an elastic element. The handle 51 is hinged to the left and right ends of the connecting rod 12, allowing it to swing up and down. One end of the pull cable is connected to the control handle 51, and the other end is connected to the locking plate 422. Under the action of external force, the control handle 51 swings upward, which can pull the locking plate 422 forward through the pull cable, causing the locking plate 422 to swing forward and unlocking the backward movement of the locking rod 41. The elastic element is used to elastically push the locking plate 422 backward. After the external force disappears, the elastic element can elastically push the locking plate 422 backward, causing the locking plate 422 to swing backward and lock the backward movement of the locking rod 41. Specifically, there are preferably two support plates 20, and two corresponding control structures 50 are also provided. It can be understood that one control structure 50 controls the swing of one support plate 20.

[0033] Furthermore, the locking component 42 also includes a housing 421, which has an installation space. The housing 421 is hinged to the rear end of the telescopic bracket 30, allowing it to swing back and forth. Two clamping posts 4212 spaced back and forth are fixedly installed at the upper end of the installation space. The upper end of the locking plate 422 is clamped between the two clamping posts 4212 to hold the locking plate 422 within the installation space. The lower end of the locking plate 422 can swing back and forth about the clamping point. The middle of the left and right side walls of the installation space are each provided with a... The opening 4211 has a spring 52 as the elastic element. The spring 52 is sleeved on the rear end of the locking rod 41 and is located inside the opening 4211. One end of the spring 52 abuts against the front side wall of the locking plate 422, and the other end abuts against the front side wall of the opening 4211 on both sides of the mounting space, so that the spring 52 is compressed when the locking plate 422 swings forward. The pull wire is fixed to the lower end of the locking plate 422. Specifically, the upper end of the outer shell 421 of the locking element 42 is hinged to the lower part of the middle of the first movable rod 311.

[0034] Specifically, the locking rod 41 passes through the front wall of the housing 421, the through hole 423 of the locking plate 422, and the rear wall of the housing 421 in sequence.

[0035] To further illustrate the various embodiments, the present invention provides accompanying drawings. These drawings are part of the disclosure of the present invention, primarily used to illustrate the embodiments and to explain the operating principles of the embodiments in conjunction with the relevant descriptions in the specification. With reference to these drawings, those skilled in the art should be able to understand other possible implementations and the advantages of the present invention. Components in the drawings are not drawn to scale, and similar component symbols are generally used to represent similar components.

[0036] Furthermore, the directions such as front, back, left, and right mentioned in this embodiment are only for reference and do not represent the actual directions in use. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0037] The above description is only a preferred embodiment of this utility model and is not intended to limit the design of this case. All equivalent changes made based on the key design of this case shall fall within the protection scope of this case.

Claims

1. A leg support adjustment structure for a rehabilitation chair, the rehabilitation chair having a seating area for a person to sit on and connecting rods extending left and right below the seating area, characterized in that: The leg support adjustment structure includes a support plate, a telescopic bracket, and a locking mechanism; The support board is located below the front of the seating area, and it contacts the lower legs of the person when they are sitting on the seating area. The rear end of the telescopic support is hinged to the connecting rod for front-to-back swing, and the support plate is hinged to the front end of the telescopic support for up-and-down swing. The telescopic support can swing forward to extend or swing backward to fold and shorten. When it swings forward to extend, it can drive the support plate to move forward and drive the lower end of the support plate to swing upward to support the human lower leg to swing upward. When the telescopic support swings backward to fold, it can drive the support plate to move backward and drive the lower end of the support plate to swing downward, so that the human lower leg swings downward. The locking mechanism includes a locking rod and a locking element. The front end of the locking rod is connected to the front end of the telescopic bracket. When the telescopic bracket swings forward, it causes the locking rod to move forward. When the telescopic bracket swings backward, it causes the locking rod to move backward. The locking element is located at the rear end of the telescopic bracket. The locking element includes a locking plate that can swing back and forth. The locking plate has a through hole. The rear end of the locking rod extends backward through the through hole. When the locking plate swings backward, it causes the through hole to swing backward, making the through hole and the locking rod cross-tilt so that the bottom side of the through hole and the bottom wall of the locking rod abut and lock. While locking the backward movement of the locking rod, locking the telescopic bracket to fold and shorten. When locking the forward movement of the locking plate, it causes the through hole to swing forward, making the through hole and the locking rod gradually perpendicular, and making the bottom wall of the through hole and the bottom wall of the locking rod gradually parallel, so as to unlock the backward movement of the locking rod and unlock the folding and shortening of the telescopic bracket.

2. The rehabilitation chair leg support adjustment structure as described in claim 1, characterized in that: The telescopic support includes a first arm and a second arm. The front end of the first arm is hinged to the upper end of the support plate, and the rear end of the first arm is hinged to the rear side of the connecting rod. The front end of the second arm is hinged to the middle of the support plate, and the rear end of the second arm is hinged to the front side of the connecting rod. The first and second arms are cross-hinged. Both the first and second arms can swing forward to extend or swing backward to retract. When the first arm swings forward to extend, it can move the support plate forward and cause the second arm to swing forward to extend. When the second arm swings forward to extend, it can support the lower end of the support plate to swing upward about the hinge point at the front end of the first arm. When the first arm swings backward to retract, it can move the support plate backward and cause the second arm to swing backward to retract. When the second arm swings backward to retract, it can cause the lower end of the support plate to swing downward about the hinge point at the front end of the first arm.

3. The rehabilitation chair leg support adjustment structure as described in claim 2, characterized in that: The first support arm includes a first movable rod and a second movable rod. The first movable rod extends vertically, with its upper end hinged to the rear side of the mounting base, and its lower end swinging back and forth about the hinge point. The second movable rod extends forward and backward, with its front end hinged to the lower end of the first movable rod and its rear end hinged to the upper end of the support plate. The second support arm includes a third movable rod and a fourth movable rod. The third movable rod extends vertically, with its upper end hinged to the front side of the mounting base, and its lower end swinging back and forth about the hinge point. The fourth movable rod extends forward and backward in an arc shape, arching upward, with its front end hinged to the third movable rod. At the lower end, its rear end is hinged to the middle of the support plate, and the middle of the third movable rod and the middle of the second movable rod are cross-hinged; when the first movable rod swings forward, it can drive the second movable rod to move forward, so that the first support arm swings forward and extends, thereby pushing the support plate forward; when the second movable rod moves forward, it can drive the lower end of the third movable rod to swing forward, and the lower end of the third movable rod swings forward, thereby driving the front end of the fourth movable rod to move forward and lift upward, so that the second support arm swings forward and extends, thereby supporting the lower end of the support plate upward, and further supporting the upward swing of the human lower leg.

4. The rehabilitation chair leg support adjustment structure as described in claim 2, characterized in that: A mounting base is fixedly sleeved on the connecting rod. The rear end of the first arm is hinged to the rear side of the mounting base, and the rear end of the second arm is hinged to the front side of the mounting base.

5. The rehabilitation chair leg support adjustment structure as described in claim 4, characterized in that: There are two support plates, arranged alternately on the left and right, corresponding to the left and right lower legs of the human body, respectively. Each support plate is connected to a telescopic bracket, and the two telescopic brackets are arranged alternately on the left and right. Each telescopic bracket has two first arms and two second arms. The two first arms of each telescopic bracket are spaced apart on the left and right, and the two second arms are spaced apart on the left and right. A locking member is hinged between the rear ends of the two first arms, and a fixed rod is provided between the front ends of the two second arms. The front end of a locking rod is hinged to the fixed rod. There are two mounting seats, arranged alternately on the connecting rod. The two first arms and two second arms of each telescopic bracket are hinged to the same mounting seat.

6. The rehabilitation chair leg support adjustment structure as described in claim 1, characterized in that: It also includes a control structure, which controls the forward and backward rotation of the locking plate, thereby locking or unlocking the backward movement of the locking lever.

7. The rehabilitation chair leg support adjustment structure as described in claim 6, characterized in that: The control structure includes a handle, a pull cable, and an elastic element. The handle, which swings up and down, is hinged to the ends of the connecting rod extending to the left and right. One end of the pull cable is connected to the control handle, and the other end is connected to the locking plate. Under the action of external force, the handle is controlled to swing upward, which can pull the locking plate forward through the pull cable, causing the locking plate to swing forward and unlocking the backward movement of the locking rod. The elastic element is used to elastically push the locking plate backward. After the external force is removed, the elastic element can elastically push the locking plate backward, causing the locking plate to swing backward and locking the backward movement of the locking rod.

8. The rehabilitation chair leg support adjustment structure as described in claim 7, characterized in that: The locking component also includes a housing with an installation space inside. The housing is hinged to the rear end of the telescopic bracket, allowing it to swing back and forth. Two clamping posts with a front-to-back gap are fixedly installed at the upper end of the installation space. The upper end of the locking plate is clamped between the two clamping posts to hold the locking plate within the installation space. The lower end of the locking plate can swing back and forth about the clamping point. Openings are provided in the middle of the left and right side walls of the installation space. The elastic element is a spring, which is sleeved on the rear end of the locking rod and located in the opening. One end of the spring abuts against the front side wall of the locking plate, and the other end abuts against the front side wall of the opening on the left and right side walls of the installation space, so that the spring is compressed when the locking plate swings forward. The pull wire is fixed to the lower end of the locking plate.

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