Leg supporting plate structure and multifunctional lumbar vertebra rehabilitation equipment applying same

Abstract

The utility model discloses a leg supporting plate structure and multifunctional lumbar vertebra rehabilitation equipment applying the same. The leg supporting plate structure comprises a leg supporting plate body, a rotation limiting mechanism, a translation mechanism and a driving mechanism. The translation mechanism is connected with the leg supporting plate body through the rotary limiting mechanism; the driving mechanism is connected with the leg supporting plate body; when the leg supporting plate is used, in the process that the driving mechanism drives the leg supporting plate body to rotate, the rotation limiting mechanism adjusts and limits the rotation angle of the leg supporting plate body under the action of the translation mechanism. According to the leg supporting plate, the rotation limiting mechanism and the translation mechanism are connected with the leg supporting plate body, and meanwhile, the leg supporting plate body is driven by the driving mechanism to rotate, so that the rotation angle of the leg supporting plate body is fully automatically adjusted and limited by the rotation limiting mechanism under the action of the translation mechanism. According to the utility model, the use experience of a patient is improved, and the rehabilitation training of the patient is more helpful.

Description

Technical Field

[0001] The utility model belongs to the technical field of medical equipment, and in particular relates to a leg support plate structure and multifunctional lumbar rehabilitation equipment using the same. Background Art

[0002] Lumbar rehabilitation equipment is a novel device that uses mechanical transmission, and combines the characteristics of human physiology with mechanical physics and mechanics. Lumbar rehabilitation equipment is widely used for various acute and chronic injuries caused by lumbar disc herniation, low back pain, radiation leg and foot numbness, walking weakness and leg and foot muscle atrophy, as well as traumatic cervical fractures, dislocations, dislocations and other symptoms; it can also be used for cervical dizziness, headaches, tinnitus, abnormal blood pressure and other clinical symptoms; generally speaking, the leg support structure in lumbar rehabilitation equipment is a reversible structure, but the leg support in the prior art is extremely inconvenient for the user when in use, and it cannot achieve the function of fully automatic folding and fully automatic adjustment of its length and angle. Utility Model Content

[0003] In view of this, the purpose of the utility model is to provide a leg support structure, which solves the problem in the prior art that the leg support structure cannot be fully automatically folded and the angle and position cannot be fully automatically adjusted when in use.

[0004] The utility model also aims to provide a multifunctional lumbar rehabilitation device using the above-mentioned leg support mechanism.

[0005] In order to achieve the above object, the technical solution of the utility model is implemented as follows:

[0006] A leg support structure comprises a leg support body, a rotation limiting mechanism, a translation mechanism and a driving mechanism; the translation mechanism is connected to the leg support body via the rotation limiting mechanism; the driving mechanism is connected to the leg support body; when in use, when the driving mechanism drives the leg support body to rotate, the rotation limiting mechanism, under the action of the translation mechanism, realizes fully automatic adjustment and limitation of the rotation angle of the leg support body.

[0007] In the above scheme, the rotation limiting mechanism includes a rotating shaft body and a base plate unit, the leg support plate body is connected to the rotating shaft body, and the rotating shaft body is connected to the translation mechanism through the base plate unit.

[0008] In the above scheme, the substrate unit includes a first substrate, a lock tongue, a lock tongue frame, a first elastic member, a locking plate and a connecting rod, the lock tongue is cooperatively connected with the first elastic member, and the lock tongue and the first elastic member are both arranged in the lock tongue frame; the lock tongue, the lock tongue frame, the first elastic member and the locking plate are all arranged on one side of the first substrate, and the locking plate is connected to the lock tongue through the connecting rod.

[0009] In the above solution, the base plate unit further includes an upper cover, and the upper cover is connected to the locking tongue frame.

[0010] In the above solution, a lock tongue limiting groove corresponding to the lock tongue is provided on the upper cover, one end of the locking piece is connected to the lock tongue through the lock tongue limiting groove, and the other end is cooperatively connected to the lock tongue frame.

[0011] In the above solution, a locking piece limiting groove for limiting the rotation angle of the locking piece is provided on the locking tongue frame.

[0012] In the above scheme, a locking groove and a leg support plate flip limit groove are respectively provided on the rotating shaft body, and the locking groove cooperates with the locking tongue to limit the rotating shaft body; the leg support plate flip limit groove cooperates with the upper cover to limit the rotating shaft body.

[0013] In the above solution, the translation mechanism includes a second substrate, a slide rail unit and a second elastic member arranged on the second substrate, the second substrate is connected to the rotating shaft body, and one end of the second elastic member is connected to the first substrate.

[0014] In the above solution, a control release groove for limiting the rotation angle of the rotating shaft body is provided on the second substrate.

[0015] In the above solution, the slide rail unit includes a slide rail and a slide rail seat, one side of the slide rail is fixedly connected to the first substrate, and the other side slides in cooperation with the slide rail seat.

[0016] In the above scheme, the driving mechanism includes a base and a driving member for driving the leg support body to rotate, the base is arranged on the leg support body, and the driving member is connected to the leg support body through the base.

[0017] Another technical solution of the utility model is implemented as follows: a multifunctional lumbar rehabilitation device comprises a multifunctional lumbar rehabilitation device body and a leg support plate structure, wherein the leg support plate structure is connected to the multifunctional lumbar rehabilitation device body.

[0018] In the above scheme, the multifunctional lumbar rehabilitation equipment body also includes a lumbar plate structure, the locking piece in the leg support plate structure is cooperatively connected to the lumbar plate structure; the second elastic member in the leg support plate structure is connected to the lumbar plate structure.

[0019] Compared with the prior art, the utility model connects the rotation limit mechanism and the translation mechanism with the leg support body, and uses the driving mechanism to drive the leg support body to rotate, so that the rotation limit mechanism can fully automatically adjust and limit the rotation angle of the leg support body under the action of the translation mechanism. The utility model improves the user experience of patients and is more helpful for the rehabilitation training of patients; the utility model is simple to use and is suitable for rehabilitation treatment of patients with lumbar spondylosis. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A three-dimensional structural schematic diagram of a leg support structure provided in Example 1 of the utility model;

[0021] Figure 2 A schematic diagram of a three-dimensional structure from another angle of a leg support structure provided in Example 1 of the utility model;

[0022] Figure 3 A schematic diagram of the three-dimensional structure of a rotation limiting mechanism and a translation mechanism in a leg support structure provided in Example 1 of the utility model;

[0023] Figure 4 A schematic diagram of the three-dimensional structure from another angle of a rotation limiting mechanism and a translation mechanism in a leg support structure provided in Example 1 of the utility model;

[0024] Figure 5 for Figure 4 A local enlarged schematic diagram of the middle A;

[0025] Figure 6 An exploded schematic diagram of a rotation limiting mechanism and a translation mechanism in a leg support structure provided in Example 1 of the utility model;

[0026] Figure 7 A schematic diagram of the matching connection structure between a locking tongue and a locking groove in a leg support structure provided in Example 1 of the utility model;

[0027] Figure 8 A schematic diagram of a matching connection structure of a locking tongue and a locking groove in another state in a leg support structure provided in Example 1 of the utility model;

[0028] Fig. 9 A schematic diagram of the matching connection structure of a multifunctional lumbar rehabilitation device and a leg support structure provided in Example 1 of the utility model;

[0029] Fig.10 A schematic diagram of another matching connection structure between a multifunctional lumbar rehabilitation device and a leg support structure provided in Example 1 of the utility model.

[0030] In the figure, 1. leg support plate body, 2. rotation limiting mechanism, 21. rotating shaft body, 211. locking groove, 212. leg support plate flip limiting groove, 22. base plate unit, 221. first base plate, 222. locking tongue, 223. locking tongue frame, 2231. locking plate limiting groove, 224. first elastic member, 225. locking plate, 226. upper cover, 2261. locking tongue limiting groove, 227. connecting rod, 3. translation mechanism, 31. second base plate, 311. control release groove, 32. slide rail unit, 321. slide rail, 322. slide rail seat, 33. second elastic member, 4. driving mechanism, 41. base, 42. driving member, 5. multifunctional lumbar rehabilitation equipment body. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail in combination with specific embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0032] In the description of the present utility model, it should be clarified that the terms "vertical", "lateral", "longitudinal", "front", "rear", "left", "right", "up", "down", "horizontal" and the like indicating orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present utility model, and do not mean that the device or element referred to must have a specific orientation or position, and therefore cannot be understood as a limitation on the present utility model. In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0033] Example 1

[0034] A leg support structure provided in Example 1 of the utility model, see Figure 1 to Figure 2 , including a leg support body 1, a rotation limiting mechanism 2, a translation mechanism 3 and a driving mechanism 4; the translation mechanism 3 is connected to the leg support body 1 through the rotation limiting mechanism 2; the driving mechanism 4 is connected to the leg support body 1; when in use, when the driving mechanism 4 drives the leg support body 1 to rotate, the rotation limiting mechanism 2 realizes fully automatic adjustment and limitation of the rotation angle of the leg support body 1 under the action of the translation mechanism 3.

[0035] After adopting the above scheme, the utility model connects the rotation limiting mechanism 2 and the translation mechanism 3 with the leg support body 1, and uses the driving mechanism 4 to drive the leg support body 1 to rotate, so that the rotation limiting mechanism 2 can adjust and limit the rotation angle of the leg support body 1 under the action of the translation mechanism 3. The utility model improves the user experience of the patient and is more helpful for the rehabilitation training of the patient; the utility model is simple to use and is suitable for rehabilitation treatment of patients with lumbar spondylosis.

[0036] See also Figure 1 and Figure 2 In the specific implementation process of the embodiment 1 of the present utility model, further, the rotation limiting mechanism 2 includes a shaft body 21 and a base unit 22, the leg support body 1 is connected to the shaft body 21, and the shaft body 21 is connected to the translation mechanism 3 through the base unit 22. The shaft body 21 directly controls the rotation of the leg support body 1.

[0037] See also Figures 3 to 8 In the specific implementation process of Example 1 of the utility model, further, the substrate unit 122 includes a first substrate 221, a lock tongue 222, a lock tongue frame 223, a first elastic member 224, a locking piece 225 and a connecting rod 227. The lock tongue 222 is connected with the first elastic member 224, and the lock tongue 222 and the first elastic member 224 are both arranged in the lock tongue frame 223; the lock tongue 222, the lock tongue frame 223, the first elastic member 224 and the locking piece 225 are all arranged on one side of the first substrate 221; the locking piece 225 is connected with the lock tongue 222 through the connecting rod 227. The first substrate 221 is a bearing plate of the lock tongue frame 223. The lock tongue 222 cooperates with the first elastic member 224 to enable the lock tongue 222 to have a certain elastic force in the lock tongue frame 223, so that the lock tongue 222 can limit the rotation shaft body 21, and the locking piece 225 uses the connecting rod 227 to pull the position of the lock tongue 222.

[0038] More specifically, a groove matching the shape of the lock tongue 222 and the first elastic member 224 is provided on the lock tongue frame 223, and the lock tongue 222 and the first elastic member 224 are disposed in the groove.

[0039] See also Figure 6 In the specific implementation process of the first embodiment of the present utility model, further, the base unit 22 also includes an upper cover 226, and the upper cover 226 is connected to the lock tongue frame 223. The upper cover 226 cooperates with the lock tongue frame 223 to limit the position of the lock tongue 222.

[0040] In the specific implementation process of Example 1 of the utility model, further, a lock tongue limiting groove 2261 corresponding to the lock tongue 222 is provided on the upper cover 226, one end of the locking piece 225 is connected to the lock tongue 222 through the lock tongue limiting groove 2261, and the other end is connected to the lock tongue frame 223.

[0041] Furthermore, a locking piece limiting groove 2231 for limiting the rotation angle of the locking piece 225 is provided on the locking tongue frame 223 .

[0042] More specifically, a first screw is provided on one end of the locking piece 225 connected to the locking piece limiting groove 2231 ; the first screw is located in the locking piece limiting groove 2231 , and the first screw ensures that one end of the locking piece 225 is always located in the locking piece limiting groove 2231 .

[0043] See also Figures 6 to 8 In the specific implementation process of Example 1 of the utility model, further, a locking groove 211 and a leg support plate flip limit groove 212 are respectively provided on the rotating shaft body 21, and the locking groove 211 cooperates with the locking tongue 222 to limit the rotating shaft body 21; the leg support plate flip limit groove 212 cooperates with the upper cover 226 to limit the rotating shaft body 21, and the leg support plate flip limit groove 212 ensures that the maximum rotation angle of the rotating shaft body 21 is 90°.

[0044] See also Figures 1 to 4 In the specific implementation process of the embodiment 1 of the utility model, the translation mechanism 3 further includes a second base plate 31, a slide rail unit 32 and a second elastic member 33 arranged on the second base plate 31, the second base plate 31 is connected to the shaft body 21, and one end of the second elastic member 33 is connected to the first base plate 221. The second base plate 31 is a bearing plate of the translation mechanism 3, and the second base plate 31 is used to limit the flip angle of the shaft body 21; the slide rail unit 32 is used to support the leg support plate body 1 for linear sliding; the second elastic member 33 is used to ensure the stability of the leg support plate body 1.

[0045] Furthermore, a control release slot 311 for limiting the rotation angle of the rotating shaft body 21 is provided on the second substrate 31 .

[0046] More specifically, a second screw is provided on the shaft body 21, and the second screw is located in the control release groove 311. When the shaft body 21 is in a process of changing from horizontal to folded or from folded to horizontal, the second screw always slides in the control release groove 311, thereby ensuring that the shaft body 21 will not be horizontally extended or retracted during rotation; when the shaft body 21 is changed to an unfolded state, the second screw slides out of the control release groove 311, thereby ensuring that the shaft body 21 and the leg support body 1 can be extended and retracted when they are in a horizontal state.

[0047] In the specific implementation process of Example 1 of the utility model, further, the slide rail unit 32 includes a slide rail 321 and a slide rail seat 322. One side of the slide rail 321 is fixedly connected to the first substrate 221, and the other side slides in cooperation with the slide rail seat 322. The slide rail 321 cooperates with the slide rail seat 322, so that the slide rail 321 drives the first substrate 221 to slide, thereby realizing translation and extension.

[0048] In the specific implementation process of Example 1 of the utility model, further, the second elastic member 33 is connected to the second substrate 31; during the horizontal extension or folding process, the second elastic member 33 can ensure the stability of the movement of the leg support body 1 and the shaft body 21, and the second elastic member 33 can eliminate the overall shaking of the leg support structure.

[0049] See also Figure 1 , Figure 2 , Fig. 9 as well as Fig.10 In the specific implementation process of Example 1 of the utility model, further, the driving mechanism 4 includes a base 41 and a driving member 42 for driving the leg support body 1 to rotate, the base 41 is arranged on the leg support body 1, and the driving member 42 is connected to the leg support body 1 through the base 41. The driving member 42 is connected with the multifunctional lumbar rehabilitation device body 5 to drive the leg support body 1 to rotate.

[0050] The working principle of a leg support structure provided in Example 1 of the utility model is as follows:

[0051] See also Figures 1 to 10In the process of unfolding the leg support structure from a 90° folded state to a horizontal state, first, the multifunctional lumbar rehabilitation equipment body 5 controls the driving member 42 in the driving structure 4 to start, and the driving member 42 drives the leg support body 1 to rotate through the base 41. In this process, the second screw on the shaft body 21 slides from the high point of the control release groove 311 to the low point of the control release groove 311, and the leg support flip limit groove 212 and the upper cover 226 are stuck with each other. When the leg support body 1 rotates to a horizontal state under the action of the driving member 42, the rotation angle of the shaft body 21 is locked under the action of the leg support flip limit groove 212. At this time, the leg support body 1 is rotated to a horizontal state under the action of the driving member 42. The support plate body 1 can only be extended and retracted in the horizontal direction, and the position of the locking groove 211 just corresponds to the position of the locking tongue 222; then, the driving member 42 continues to drive the leg support plate body 1 to move through the base 41. At this time, since the leg support plate body 1 can only move in the horizontal direction, the leg support plate body 1 is extended outward under the support of the slide rail unit 32. When the leg support plate body 1 extends outward for a short distance, the locking piece 225 is away from the multifunctional lumbar rehabilitation device body 5. At the same time, the first elastic member 224 applies a horizontal thrust to the locking tongue 222, and the locking tongue 222 moves toward the rotating shaft body 21 in the horizontal direction and just enters the locking groove 211. During the movement of the locking tongue 222, the locking tongue 222 drives the locking piece 225 to move through the connecting rod 227, so that the first screw on the locking piece 225 moves from the high point of the limiting groove 2231 to the low point of the limiting groove 2231. Finally, the driving member 42 continues to drive the leg support body 1 to move through the base 41. Since the rotating shaft body 21 is limited by the locking tongue 222, the leg support body 1 extends horizontally outward. At the same time, the slide rail 321 cooperates with the slide rail seat 322 to support the leg support body 1 to extend horizontally outward, completing the horizontal extension process.

[0052] See also Figures 1 to 10In the process of the leg support structure shrinking from the horizontal state to the 90° folded state, first, the driving member 42 in the driving structure 4 is started by the multifunctional lumbar vertebra rehabilitation device body 5, and the driving member 42 drives the leg support body 1 to rotate through the base 41. Since the locking tongue 222 and the locking groove 211 limit the rotation of the shaft body 21, the leg support body 1 can only shrink in the horizontal direction, and the rotation limit mechanism 2 shrinks horizontally under the support of the slide rail unit 32; when the leg support body 1 shrinks horizontally for a short distance, one side of the locking piece 225 abuts against the multifunctional lumbar vertebra rehabilitation device body 5, and the first screw on the locking piece 225 retreats to the high point of the limiting groove 2231. During the movement of the locking piece 225, the driving member 42 continues to provide driving force, and the locking piece 225 retreats the locking tongue 222 from the locking groove 211 to the locking tongue frame 223 through the connecting rod 227, and the locking tongue 222 compresses the first elastic member 224, and finally makes. At this time, the driving member 42 continues to drive the leg support body 1 to move through the base 41. Since the locking tongue 222 withdraws from the locking groove 211, under the action of the driving member 42, the leg support body 1 starts to rotate, and the second screw on the shaft body 21 enters the low point of the control release groove 311, and then slides from the low point of the control release groove 311 to the high point of the control release groove 311, and finally the leg support body 1 rotates to a 90° folded state to complete the folding process.

[0053] Example 2

[0054] Embodiment 2 of the present invention provides a multifunctional lumbar rehabilitation device, comprising a multifunctional lumbar rehabilitation device body 5 and a leg support plate structure as in Embodiment 1, wherein the leg support plate structure is connected to the multifunctional lumbar rehabilitation device body 5 .

[0055] The multifunctional lumbar rehabilitation device body 5 also includes a lumbar plate structure, and the locking piece 225 in the leg support plate structure is cooperatively connected with the lumbar plate structure; the second elastic member 33 in the leg support plate structure is connected with the lumbar plate structure.

[0056] By applying the leg support structure in Example 1 to the existing lumbar rehabilitation equipment, the problem in the prior art that the leg support structure cannot be fully automatically folded and the angle and position cannot be fully automatically adjusted during use can be solved.

[0057] In summary, the utility model connects the rotation limiting mechanism 2 and the translation mechanism 3 with the leg support body 1, and uses the driving mechanism 4 to drive the leg support body 1 to rotate, so that the locking tongue 222, the locking tongue frame 223, the first elastic member 224, the locking plate 225, the connecting rod 227 and the locking groove 211 in the rotation limiting mechanism 2 can realize the fully automatic adjustment and limitation of the rotation angle of the leg support body 1 under the support of the slide rail unit 32 in the translation mechanism 3. At the same time, the utility model uses the translation mechanism 3 to extend and retract the leg support body 1 in the horizontal direction to match the user's body shape. The utility model improves the patient's use experience and is more helpful for the patient's rehabilitation training. The utility model is simple to use and is suitable for rehabilitation treatment of patients with lumbar spondylosis.

[0058] The above is only a preferred specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the utility model should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A leg support structure, characterized in that: The leg support comprises a leg support body (1), a rotation limiting mechanism (2), a translation mechanism (3) and a driving mechanism (4); the translation mechanism (3) is connected to the leg support body (1) via the rotation limiting mechanism (2); the driving mechanism (4) is connected to the leg support body (1); when in use, when the driving mechanism (4) drives the leg support body (1) to rotate, the rotation limiting mechanism (2) realizes fully automatic adjustment and limitation of the rotation angle of the leg support body (1) under the action of the translation mechanism (3).

2. A leg support structure according to claim 1, characterized in that: The rotation limiting mechanism (2) comprises a rotating shaft body (21) and a base plate unit (22); the leg support plate body (1) is connected to the rotating shaft body (21); and the rotating shaft body (21) is connected to the translation mechanism (3) via the base plate unit (22).

3. A leg support structure according to claim 2, characterized in that: The substrate unit (22) comprises a first substrate (221), a lock tongue (222), a lock tongue frame (223), a first elastic member (224), a locking piece (225) and a connecting rod (227); the lock tongue (222) is cooperatively connected with the first elastic member (224), and the lock tongue (222) and the first elastic member (224) are both arranged in the lock tongue frame (223); the lock tongue (222), the lock tongue frame (223), the first elastic member (224) and the locking piece (225) are all arranged on one side of the first substrate (221), and the locking piece (225) is connected with the lock tongue (222) through the connecting rod (227).

4. A leg support structure according to claim 3, characterized in that: The base plate unit (22) also includes an upper cover (226), and the upper cover (226) is connected to the locking tongue frame (223).

5. A leg support structure according to claim 4, characterized in that: The upper cover (226) is provided with a lock tongue limiting groove (2261) corresponding to the lock tongue (222); one end of the locking piece (225) is connected to the lock tongue (222) through the lock tongue limiting groove (2261), and the other end is matched and connected to the lock tongue frame (223).

6. A leg support structure according to claim 5, characterized in that: The locking tongue frame (223) is provided with a locking piece limiting groove (2231) for limiting the rotation angle of the locking piece (225).

7. A leg support structure according to claim 4, characterized in that: The rotating shaft body (21) is provided with a locking groove (211) and a leg support plate turning limit groove (212) respectively; the locking groove (211) cooperates with the locking tongue (222) to limit the rotating shaft body (21); the leg support plate turning limit groove (212) cooperates with the upper cover (226) to limit the rotating shaft body (21).

8. The leg support structure according to claim 3, characterized in that: The translation mechanism (3) comprises a second substrate (31), a slide rail unit (32) arranged on the second substrate (31), and a second elastic member (33); the second substrate (31) is connected to the rotating shaft body (21); and one end of the second elastic member (33) is connected to the first substrate (221).

9. A leg support structure according to claim 8, characterized in that: The second substrate (31) is provided with a control release groove (311) for limiting the rotation angle of the rotating shaft body (21).

10. A leg support structure according to claim 8, characterized in that: The slide rail unit (32) comprises a slide rail (321) and a slide rail seat (322); one side of the slide rail (321) is fixedly connected to the first base plate (221), and the other side slides in cooperation with the slide rail seat (322).

11. The leg support structure according to claim 1, characterized in that: The driving mechanism (4) comprises a base (41) and a driving member (42) for driving the leg support body (1) to rotate, wherein the base is arranged on the leg support body (1), and the driving member (42) is connected to the leg support body (1) via the base (41).

12. A multifunctional lumbar rehabilitation device, characterized in that: It comprises a multifunctional lumbar vertebra rehabilitation device body (5) and a leg support structure as described in any one of claims 3 to 11, wherein the leg support structure is connected to the multifunctional lumbar vertebra rehabilitation device body (5).

13. The lumbar rehabilitation device according to claim 12, characterized in that: The multifunctional lumbar rehabilitation device body (5) also includes a lumbar plate structure, and the locking piece (225) in the leg support plate structure is cooperatively connected to the lumbar plate structure; the second elastic member (33) in the leg support plate structure is connected to the lumbar plate structure.

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