Wearable lower limb squatting power assisting device

Abstract

The invention provides a wearable lower limb squatting power assisting device. The wearable lower limb squatting power assisting device comprises thigh supporting parts connected with thighs and used for supporting the thighs; the shank connecting part is connected with the shank and is in contact support with the ground; the thigh supporting part is connected with the shank connecting part through a revolute pair; a supporting rod which is telescopic in length and has a supporting effect on the thigh supporting part is connected between the thigh supporting part and the shank connecting part, and the supporting rod can stretch out and draw back within the range of 90 degrees formed by the thigh supporting part and the shank connecting part when the human body squats and 180 degrees formed by the thigh supporting part and the shank connecting part when the human body stands. Load of muscles and knee joints of a human body in the squatting and squatting process can be remarkably relieved, and the injury risk is effectively reduced. The squatting and walking are more flexible, the working efficiency is effectively improved, meanwhile, a large load can be borne at the preset squatting angle position, and the requirement for long-time and large-load working at the preset angle position can be met.

Description

Technical Field

[0001] The present invention belongs to the technical field of assistive devices, and in particular relates to a wearable lower limb squat assist device. Background Art

[0002] In modern industrial production, many work scenarios require workers to squat and stand frequently, especially in areas such as assembly lines, warehouse management, and equipment maintenance. Long-term engagement in this type of labor not only leads to excessive physical exertion among workers, but can also cause occupational diseases such as knee injuries and lumbar strain, seriously affecting workers' health and productivity. This type of muscle injury caused by occupational reasons is called occupational musculoskeletal disease. Traditional solutions usually rely on personal protective equipment or simple mechanical auxiliary tools such as knee pads and carts. Although these methods can alleviate the problem to a certain extent, they cannot fundamentally solve the damage to workers' health caused by the load generated by repetitive movements, nor can they effectively improve workers' work efficiency. Summary of the Invention

[0003] In order to fundamentally solve the damage to workers' health caused by the load generated by repetitive movements and effectively improve workers' work efficiency, the present invention provides a wearable lower limb squat assist device.

[0004] The wearable lower limb squat assist device includes a thigh support part connected to the thigh and used to support the thigh; a calf connection part connected to the calf and supported by contact with the ground; the thigh support part and the calf connection part are connected by a rotating pair; a support rod with an extendable length and supporting the thigh support part is connected between the thigh support part and the calf connection part, and the support rod can be extended and retracted within the range of 90° formed by the thigh support part and the calf connection when the human body squats and 180° formed by the thigh support part and the calf connection when the human body stands.

[0005] Furthermore, the thigh support part includes a first connecting rod, a thigh wrap, a first strap, and a hinged ear; one end of the first connecting rod is connected to the thigh wrap, and the other end of the first connecting rod is connected to the calf connecting part through a rotating pair; the hinged ear is fixedly connected to the outer wall of the thigh wrap; one end of the first strap is connected to the first connecting rod, and the other end of the first strap is detachably connected to one end of the thigh wrap away from the first connecting rod; or one end of the first strap is fixedly connected to one side of the thigh wrap, and the other end of the first strap is detachably connected to the other side of the thigh wrap.

[0006] Furthermore, the calf connecting part includes a second connecting rod, a calf wrap, a telescopic rod, a telescopic rod sleeve, a second strap, and a slide bracket, one end of the second connecting rod is connected to the thigh supporting part through a rotating pair, and the other end of the second connecting rod is connected to the telescopic sleeve; the telescopic rod is cooperatively connected to the telescopic sleeve, and the telescopic rod can be adjusted longitudinally within the telescopic sleeve and is fixed in a preset position by a limit pin; the calf wrap is fixedly connected to the middle part of the second connecting rod; the slide bracket is fixedly connected to the outer wall of the calf wrap; one end of the second strap is connected to the second connecting rod, and the other end of the second strap is detachably connected to the calf wrap; or one end of the second strap is fixedly connected to one side of the calf wrap, and the other end of the second strap is detachably connected to the other side of the calf wrap.

[0007] Furthermore, the support rod is a gas spring, and a connection hole is provided at one end of the gas spring, which is rotatably connected to the thigh support part through a first rotating shaft; the other end of the gas spring is connected to a second rotating shaft, and the second rotating shaft is slidably connected to the calf connecting part.

[0008] Furthermore, the thigh wrap adopts an inwardly concave arc shape that fits the human thigh.

[0009] Furthermore, the slide bracket is arranged to penetrate one opposite surface in the height direction, and a waist-shaped hole is arranged on the other opposite surface; the support rod and the slide bracket are connected by a second rotating shaft, and the second rotating shaft is slidably connected to the waist-shaped hole of the slide bracket, and the support rod can be accompanied by rotational movement when sliding relative to the slide bracket.

[0010] Furthermore, a plurality of annular grooves are arranged at equal intervals on the telescopic rod; and the calf wrap adopts an inwardly concave arc shape adapted to the calf of the human body.

[0011] Furthermore, it also includes a clutch, which includes an arc-shaped slot disk, an angle preset slider, a slot bolt, a linear spring, and a slot bolt housing; the slot disk is fixedly connected to the thigh support part and is coaxially connected to the calf connection part through a rotating pair; the slot disk is provided with a slide groove for accommodating the movement of the angle preset slider, the angle preset slider is cooperatively connected to the slide groove and the angle preset slider moves along the slide groove; the slot bolt housing is fixedly connected to the calf connection part, the linear spring is installed at the bottom of the slot bolt housing cavity, one end of the slot bolt abuts against the linear spring, and the other end of the slot bolt abuts against the angle preset slider or the outer circumference of the slot disk.

[0012] Furthermore, a protrusion is provided on the outer periphery of the card slot disk.

[0013] Furthermore, a spring is connected between the angle preset slider and the sliding groove.

[0014] The wearable lower limb squat assist device provided by the present invention is connected to the thigh through the thigh support part, and the thigh support part is connected to the calf connection part, and the calf connection part is connected to the calf and supported in contact with the ground. By connecting a retractable support rod between the thigh support part and the calf connection part, the thigh support part will form support under the action of the support rod, and further the thigh support part will form effective support for the human body's thigh, which will effectively reduce the load generated by the worker's repetitive movements and the damage to the body's health caused by the load. At the same time, the thigh support part and the calf connection part are connected by a rotating pair, which can effectively improve the worker's flexibility in squatting and squatting, and effectively improve work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0016] Figure 1 A front view of a wearable lower limb squat assist device provided by an embodiment of the present invention;

[0017] Figure 2 A left side view of the wearable lower limb squat assist device provided by an embodiment of the present invention;

[0018] Figure 3 A three-dimensional diagram of a wearable lower limb squat assist device provided by an embodiment of the present invention;

[0019] Figure 4 A schematic diagram of the clutch in the standing position of the wearable lower limb squat assist device provided by an embodiment of the present invention;

[0020] Figure 5 A schematic diagram of the clutch state during a 90° squatting process of the wearable lower limb squat assist device provided by an embodiment of the present invention;

[0021] Figure 6 A schematic diagram of the clutch in the 90° squat position of the wearable lower limb squat assist device provided by an embodiment of the present invention;

[0022] Figure 7 A schematic diagram of the clutch state of the wearable lower limb squat assist device provided by an embodiment of the present invention during squatting and resetting;

[0023] Figure 8 A schematic diagram of the clutch state of the wearable lower limb squat assist device provided by an embodiment of the present invention when squatting to the full 120° position;

[0024] Figure 9 A schematic diagram of the clutch state during the standing process after squatting 120° in the wearable lower limb squat assist device provided by an embodiment of the present invention;

[0025] Description of reference numerals in the figures:

[0026] 1—thigh support part; 2—calf connection part; 3—rotation pair; 4—support rod; 5—clutch; 10—first connecting rod; 11—thigh wrapping piece; 12—first strap; 13—intersection ear; 14—first rotating shaft; 20—second connecting rod; 21—calf wrapping piece; 22—telescopic rod; 23—telescopic sleeve; 24—second strap; 25—slide bracket; 26—second rotating shaft; 50—slot disk; 51—angle preset slider; 52—slot bolt; 53—slot bolt shell; 54—protrusion. DETAILED DESCRIPTION

[0027] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0028] It should be noted that when an element is referred to as being “fixed on” or “disposed on” another element, it may be directly on the other element or indirectly on the other element. When an element is referred to as being “connected to” another element, it may be directly connected to the other element or indirectly connected to the other element.

[0029] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention.

[0030] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature identified as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "plurality" means two or more, unless otherwise specifically defined.

[0031] As attached Figure 1As shown, the wearable lower limb squat assist device provided by the present invention includes a thigh support part 1 connected to the thigh and used to support the thigh; a calf connection part 2 connected to the calf and supported in contact with the ground; the thigh support part 1 and the calf connection part 2 are connected by a rotating pair 3; a support rod 4 with an extendable length and supporting the thigh support part 1 is connected between the thigh support part 1 and the calf connection part 2, and the support rod 4 can be extended and retracted within the range of 90° formed by the thigh support part 1 and the calf connection part 2 when the human body squats and 180° formed by the thigh support part 1 and the calf connection part 2 when the human body stands.

[0032] The present invention is connected to the human thigh through a thigh support part 1, and the thigh support part 1 is connected to the calf connection part 2 through a rotational pair 3, the calf connection part forms a support with the ground foundation, and at the same time, a retractable support rod 4 is connected between the thigh connection part 1 and the calf connection part 2 to support the thigh support part 1. When a worker squats, because the support rod 4 is retractable and the thigh support part 1 and the calf connection part 2 are connected through the rotational pair 3, the worker can squat easily. At the same time, when squatting, the support rod 4 needs to be compressed, and the support rod 4 has a certain supporting effect on the thigh support part, which will also reduce the load intensity of the human body on the knee joint when squatting, reducing the damage to the knee joint. When the worker squats, the thigh support part 1 and the calf connection part 2 rotate, and the support rod 4 pushes and effectively supports the thigh support part 1, and the thigh support part 1 will form a support for the human thigh, reducing the load intensity and damage to the knee joint when the human body squats. The present invention effectively reduces the load intensity of a human body when squatting and standing up, and reduces damage to the knee joint; at the same time, it ensures the flexibility of squatting and standing up, as well as the flexibility of the human body when standing and walking, and can effectively improve work efficiency.

[0033] As attached Figure 1 , Attachment Figure 2 and attached Figure 3 As shown, in a certain embodiment, the thigh support portion 1 includes a first connecting rod 10, a thigh wrap 11, a first strap 12, and a hinged lug 13. One end of the first connecting rod 10 is connected to the thigh wrap 11, and the other end of the first connecting rod 10 is connected to the calf connecting portion 2 through a rotating pair 3; the hinged lug 13 is fixedly connected to the outer wall of the thigh wrap 11. In addition, the support rod 4 is rotatably connected to the hinged lug 13 through a first rotating shaft 14. One end of the first strap 12 is connected to the first connecting rod 10, and the other end of the first strap 12 is detachably connected to one end of the thigh wrap 11 away from the first connecting rod 10; or one end of the first strap 12 is fixedly connected to one side of the thigh wrap 11, and the other end of the first strap 12 is detachably connected to the other side of the thigh wrap 11. In a specific implementation, one end of the first strap 12 is connected to the first connecting rod 10 , and the other end of the first strap 12 is detachably connected to one end of the thigh wrapping 11 away from the first connecting rod 10 .

[0034] The above technical solution has a simple structure and is economical while effectively meeting the technical requirements. The first strap 12 can be made of a strap or an elastic flexible material. The first connecting rod 10, the thigh wrap 11, and the hinged lug 13 can be made of common carbon steel for the convenience, efficiency, and cost of production and processing. The thigh wrap 11 is designed to be concave and arc-shaped to fit the human thigh, which provides better wrapping and uniform force when supporting the thigh, thereby improving comfort.

[0035] As attached Figure 1 , Attachment Figure 2 and attached Figure 3As shown, in a certain embodiment, the calf connecting portion 2 includes a second connecting rod 20, a calf wrap 21, a telescopic rod 22, a telescopic rod sleeve 23, a second strap 24, and a slide bracket 25. One end of the second connecting rod 20 is connected to the thigh support portion 1 through a revolving pair, specifically to the first connecting rod 10 of the thigh support portion 1 through a revolving pair. The other end of the second connecting rod 20 is connected to the telescopic sleeve 23; specifically, the telescopic sleeve 23 is fixedly connected to the end of the second connecting rod 20 close to the ground, and the telescopic rod 22 is matingly connected to the telescopic sleeve 23. The telescopic rod 22 can be longitudinally adjusted within the telescopic sleeve 23 and is fixed in place at a preset position by a limit pin. To further improve the reliability and stability of the limit, a plurality of annular grooves are provided at equal intervals on the telescopic rod 22. When a limit pin is screwed into the telescopic sleeve 23 from the outside to limit the telescopic rod 22, the top end of the limit pin extends into the annular groove of the telescopic rod 22 to effectively limit the telescopic rod 22. The above-mentioned telescopic rod 22 and telescopic sleeve 23 cooperate to form an adjustable height, which enables the present invention to effectively meet the use requirements of people of different heights. The calf wrap 21 is fixedly connected to the middle part of the second connecting rod 20; the calf wrap 21 is designed to be an inward-concave arc shape that adapts to the human calf, which will improve the wrapping of the human calf, increase the contact surface, and improve the uniformity of the force. The slide bracket 25 is fixedly connected to the outer wall of the calf wrap 21; the slide bracket 25 is set through one opposite surface in the height direction, and a waist-shaped hole is set on the other opposite surface; the support rod 4 and the slide bracket 25 are connected by a second rotating shaft 26, and the second rotating shaft 26 is slidably connected to the waist-shaped hole of the slide bracket 25. When the support rod 4 slides relative to the slide bracket 25, it can be accompanied by rotational movement. At the same time, it also ensures that the support rod 4 can be in an upright state when sliding to the top of the slide bracket 25 when standing and walking. One end of the second strap 24 is connected to the second connecting rod 20, and the other end of the second strap 24 is detachably connected to the calf wrap 21; or one end of the second strap 24 is fixedly connected to one side of the calf wrap 21, and the other end of the second strap 24 is detachably connected to the other side of the calf wrap 21. In the specific implementation of this solution, one end of the second strap 24 is connected to the second connecting rod 20, and the other end of the second strap 24 is detachably connected to the calf wrap 21.

[0036] In one embodiment, the support rod 4 is a gas spring. A connection hole is provided at one end of the gas spring, allowing it to be rotatably connected to the hinged lug 13 of the thigh support portion 1 via the first rotation axis 14. Specifically, a through hole can be provided at the extended end of the gas spring piston, allowing it to be rotatably connected to the hinged lug 13 of the thigh support portion 1. The other end of the gas spring is connected to a second rotation axis 26, which is then slidably connected to the slide bracket 25 of the calf connection portion 2 via the second rotation axis 26. This arrangement ensures that the support rod 4 can rotate about the first rotation axis 14 and simultaneously slide up and down along the sliding bracket 25 while rotating about the second rotation axis 26. When a person squats to their fullest, the support rod 4 is at the bottom of the sliding bracket 25, meaning that the cylinder end of the gas spring is at the bottom of the sliding bracket 25. The technical solution provided by the present invention is that the maximum depth and amplitude of a person's squat is achieved when the angle between the thigh support portion 1 and the calf connection portion 2 is 90°. When the human body is in an upright walking position, the support rod 4 is at the top of the sliding bracket 25, that is, the cylinder end of the gas spring is at the top of the sliding bracket 25. At this time, the angle between the thigh support part 1 and the calf connecting part 2 is 180 degrees.

[0037] In the actual operation process, certain squatting positions require a long stop time, and the body needs to be at a certain amplitude or angle for a long time to bear the load. The human body's knee joints and muscles need to bear the load strength continuously, and this situation is more serious for the damage to the knee joints and muscles. At the same time, since the support rod 4 uses a gas spring, in order to reduce the overall weight of the device, it is not advisable to select a gas spring with a larger cylinder diameter when selecting the gas spring. At the same time, the load that a gas spring with a small cylinder diameter can bear is relatively small. In order to solve the above problems, the overall weight of the device can be reduced by selecting a gas spring with a smaller cylinder diameter, and the device can bear a larger load. The present invention also designs a clutch 5. As shown in the attached figure Figure 1 and attached Figure 3As shown, the clutch 5 includes an arc-shaped slot disk 50, an angle preset slider 51, a slot bolt 52, a slot bolt housing 53, and a linear spring. The slot disk 50 is fixedly connected to the thigh support portion 1 and then coaxially connected to the calf connection portion 2 via a revolving pair 3. In a specific implementation, the slot disk 50 is fixedly connected to the first connecting rod 10 and then rotationally connected to the second connecting rod 20 of the calf connection portion 2 via a coaxial revolving pair 3. A slot 54 is provided on the slot disk 50 to accommodate the movement of the angle preset slider 51. The angle preset slider 51 is matingly connected to the slot 54 and moves along the slot 54. In a specific implementation, the outer side of the angle preset slider 51 is first connected to a spring, which is then clamped into the slot 54. Under the action of the spring force, the angle preset slider 51 reciprocates along the slot 54 in the radial direction of the slot disk 50. The slot bolt housing 53 is fixedly connected to the calf connecting portion 2. Specifically, the slot bolt housing 53 is fixedly connected to the second connecting rod 20 of the calf connecting portion 2. A linear spring is installed at the bottom of the slot bolt housing 53. One end of the slot bolt 52 is abutted against the linear spring, and the other end of the slot bolt 52 is abutted against the angle preset slider 51 or the outer circumference of the slot disk 50. A protrusion 55 is provided on the outer circumference of the slot disk 50. When the slot bolt 52 engages with protrusions 55 or chutes 54 at different locations along the maximum diameter, different squatting angles can be achieved. The embodiment of the present invention only provides a solution with one chute 54, an angle preset slider 51, and one chute 55. If more angles of assistance are required, additional chutes 54 and angle preset sliders 51 can be provided at different locations along the circumference of the slot disk 50 to achieve different squatting angles.

[0038] In the specific implementation process, as shown in the attached Figure 4 As shown, in the standing or normal gait state, the angle preset slider 51 is pushed out, the slot bolt 52 is in the retracted state, and the device is in the unlocked state. Figure 5 As shown, the angle preset slider 51 is pushed out and connected with the edge of the card slot disk 50 to form a smooth transition surface. During the squatting process, the card slot disk 50 rotates in the clockwise direction, as shown in the attached figure. Figure 6 As shown, the slot bolt 52 contacts the raised portion of the rear end of the slot plate 50, causing the device to enter a 90° squatting fixed state; at this time, the user maintains a 90° squatting posture. When the user stands up, as shown in the attached Figure 7 The latch plate 50 rotates counterclockwise, the latch bolt 52 returns to the contact area of ​​the normal gait, and the clutch is unlocked and restored to the initial state.

[0039] When doing a 120° squat, Figure 4 As shown, the angle preset slider 51 is pushed out, and the slide groove 54 forms the raised edge of the slot plate 50. Figure 8As shown, during the squatting process, the slot plate 50 continues to rotate clockwise, and the slot bolt 52 presses against the raised portion in the angle preset slider slot, and the device is fixed in a 120° squatting state; at this time, the user maintains a 120° squatting posture. When standing up, as shown in the attached Figure 9 As shown, the angle preset slider 51 is pushed out again and engages with the edge of the slot plate 50 to form a smooth curved surface, and the slot bolt 52 enters a retracted state. Figure 7 As shown, the slot disc 50 then rotates counterclockwise, and the slot pin 52 returns to the contact area of ​​the normal gait again, and the device returns to the initial state.

[0040] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A wearable lower limb squat assist device, characterized by: The invention comprises a thigh supporting part connected to the thigh and used for supporting the thigh; a calf connecting part connected to the calf and supporting the calf in contact with the ground; the thigh supporting part and the calf connecting part are connected by a rotating pair; a support rod with a retractable length and supporting the thigh supporting part is connected between the thigh supporting part and the calf connecting part, and the support rod can be retracted within the range of 90° formed by the thigh supporting part and the calf connecting part when the human body squats and 180° formed by the thigh supporting part and the calf connecting part when the human body stands.

2. The wearable lower limb squat assist device according to claim 1, characterized in that: The thigh support part includes a first connecting rod, a thigh wrap, a first strap, and a hinged ear; one end of the first connecting rod is connected to the thigh wrap, and the other end of the first connecting rod is connected to the calf connecting part through a rotating pair; the hinged ear is fixedly connected to the outer wall of the thigh wrap; one end of the first strap is connected to the first connecting rod, and the other end of the first strap is detachably connected to one end of the thigh wrap away from the first connecting rod; or one end of the first strap is fixedly connected to one side of the thigh wrap, and the other end of the first strap is detachably connected to the other side of the thigh wrap.

3. The wearable lower limb squat assist device according to claim 1, characterized in that: The calf connecting part includes a second connecting rod, a calf wrap, a telescopic rod, a telescopic rod sleeve, a second strap, and a slide bracket. One end of the second connecting rod is connected to the thigh supporting part through a rotating pair, and the other end of the second connecting rod is connected to the telescopic sleeve; the telescopic rod is cooperatively connected to the telescopic sleeve, and the telescopic rod can be adjusted longitudinally within the telescopic sleeve and is fixed in a preset position by a limit pin; the calf wrap is fixedly connected to the middle part of the second connecting rod; the slide bracket is fixedly connected to the outer wall of the calf wrap; one end of the second strap is connected to the second connecting rod, and the other end of the second strap is detachably connected to the calf wrap; or one end of the second strap is fixedly connected to one side of the calf wrap, and the other end of the second strap is detachably connected to the other side of the calf wrap.

4. The wearable lower limb squat assist device according to claim 1, wherein: The support rod is a gas spring, one end of which is rotatably connected to the thigh support part through a first rotating shaft via a connecting hole; the other end of the gas spring is connected to a second rotating shaft, and the second rotating shaft is slidably connected to the calf connecting part.

5. The wearable lower limb squat assist device according to claim 2, characterized in that: The thigh wrap adopts a concave arc-shaped structure that adapts to the human thigh.

6. The wearable lower limb squat assist device according to claim 3, characterized in that: The slide bracket is arranged to pass through one opposite surface in the height direction, and a waist-shaped hole is arranged on the other opposite surface; the support rod and the slide bracket are connected by a second rotating shaft, and the second rotating shaft is slidably connected to the waist-shaped hole of the slide bracket, and the support rod can be accompanied by rotational movement when sliding relative to the slide bracket.

7. The wearable lower limb squat assist device according to claim 3, characterized in that: The telescopic rod is provided with a plurality of annular grooves at equal intervals; and the calf wrapping piece adopts an inwardly concave arc shape adapted to the calf of the human body.

8. The wearable lower limb squat assist device according to any one of claims 1 to 7, characterized in that: It also includes a clutch, which includes an arc-shaped slot disk, an angle preset slider, a slot bolt, a linear spring, and a slot bolt housing; the slot disk is fixedly connected to the thigh support part and is coaxially connected to the calf connection part through a rotating pair; the slot disk is provided with a slide groove for accommodating the movement of the angle preset slider, the angle preset slider is connected to the slide groove and the angle preset slider moves along the slide groove; the slot bolt housing is fixedly connected to the calf connection part, the linear spring is installed at the bottom of the slot bolt housing cavity, one end of the slot bolt abuts against the linear spring, and the other end of the slot bolt abuts against the angle preset slider or the outer circumference of the slot disk.

9. The wearable lower limb squat assist device according to claim 8, characterized in that: A protrusion is also provided on the outer periphery of the card slot disk.

10. The wearable lower limb squat assist device according to claim 9, characterized in that: A spring is further connected between the angle preset slider and the sliding groove.

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