Multi-posture folding rehabilitation bed capable of being switched and adjusted

Abstract

The invention belongs to the technical field of medical rehabilitation, and provides a multi-posture folding rehabilitation bed capable of being switched and adjusted, which comprises a support moving assembly, a pitching mechanism, a bed body lifting assembly, a sitting posture adjusting assembly and an armrest adjusting assembly, and is characterized in that a pitching driving cylinder of the pitching mechanism is connected with a first end of the support moving assembly; the pitching mechanism is located below the bed body lifting assembly, a second connecting frame of the pitching mechanism is connected with a main back beam of the bed body lifting assembly, the main back beam is connected with the second end of the supporting moving assembly, a sitting plate of the sitting posture adjusting assembly is connected with an upper cylinder of the bed body lifting assembly, and a bed foot plate is rotationally connected with the sitting posture adjusting assembly. According to the rehabilitation bed, the base, the first connecting frame, the second connecting frame and the main back beam form a four-rod mechanism, the four-rod mechanism is matched with a spring telescopic rod, the pitching driving cylinder completes turning assistance with a small force arm in a narrow space, and switching of multiple postures of the sitting posture, the lying posture, the standing posture and the prone posture of the rehabilitation bed is achieved.

Description

Technical Field

[0001] The invention belongs to the technical field of medical rehabilitation, and in particular relates to a multi-posture foldable rehabilitation bed capable of switching and adjusting. Background Art

[0002] When users undergo rehabilitation training, they often need a medical rehabilitation bed as support and reliance for their body. By fixing to the rehabilitation bed, users can follow the bed's movements to different postures such as sitting, lying, and standing. With the assistance of a trainer or upper and lower limb rehabilitation robots, users can complete rehabilitation training in different postures in different training scenarios.

[0003] CN 218500925 U discloses a multi-posture medical rehabilitation bed, in particular, a pitch drive device and an outer back beam are connected to the right side of the rotating shaft of the rehabilitation bed and the base, and the driver and the auxiliary device are arranged in a folded form inside the base in a horizontal state, which makes it difficult to pitch up in a small angle range at the initial stage, and the auxiliary device directly acts on the bed body only to provide assistance in the initial stage and a side effect of tilting forward in the later stage, which makes the bed body unstable in the rehabilitation state, and the internal space is completely occupied and requires an external electric cabinet, which makes it impossible to move freely and the scene is single; CN116763561B discloses a rehabilitation training bed for lower limb training, and CN116763596A discloses an electric standing rehabilitation bed. Most of the beds can realize a single standing or sitting function in addition to a lying position, and a few can realize the three-posture function of sitting, lying and standing. Moreover, the working posture of the rehabilitation bed is only standing, and there is no rehabilitation training function in the sitting state. The training function is single, so it is necessary to propose a multi-posture foldable rehabilitation bed that can be switched and adjusted. Summary of the invention

[0004] In view of the problems existing in the prior art, the present invention provides a multi-posture foldable rehabilitation bed that can be switched and adjusted. Through the cooperation of the first connecting frame, the second connecting frame and the spring telescopic rod in the pitch mechanism, it can assist the pitch drive cylinder to provide an upward force to pull up the bed body in the initial stage of tilting up, and provide a backward pulling force to prevent the bed body from tipping over in the later stage, thereby realizing multiple assistance, achieving the ultimate directional assistance of the rehabilitation bed, and reducing the output power of the pitch drive. Under the drive of the pitch drive cylinder, a four-bar mechanism is formed by the base, the first connecting frame, the second connecting frame and the main back beam, and cooperates with the spring telescopic rod to realize the switching of the rehabilitation bed into a sitting position, a lying position, a standing position and a lying position.

[0005] The present invention provides a switchable and adjustable multi-posture foldable rehabilitation bed, which comprises a support moving assembly, a pitch mechanism, a bed lifting assembly, a sitting posture adjustment assembly and an armrest adjustment assembly, wherein a pitch drive cylinder of the pitch mechanism is connected to the base of the support moving assembly, the pitch mechanism is located below the bed lifting assembly, the second connecting frame of the pitch mechanism is connected to the main back beam of the bed lifting assembly, and the main back beam is connected to the base, the seat plate of the sitting posture adjustment assembly is connected to the upper cylinder of the bed lifting assembly, the footboard is rotatably connected to the sitting posture adjustment assembly, and the armrest adjustment mechanism is symmetrically arranged on both sides of the bed lifting assembly; the pitch mechanism comprises a first connecting frame, a second connecting frame, a spring telescopic rod and a pitch drive cylinder, the first end of the first connecting frame is connected to the upper end of the base through a second rotating pair, the first end of the second connecting frame is connected to the second end of the first connecting frame through a sixth rotating pair, the telescopic end of the spring telescopic rod is connected to the middle part of the main back beam of the bed lifting assembly through a seventh rotating pair, and the fixed end of the spring telescopic rod is connected to the middle part of the main back beam of the bed lifting assembly through a seventh rotating pair. The eighth rotating pair is connected to the middle part of the second connecting frame, and the telescopic rod of the pitch driving cylinder is connected to the first end of the main back beam in the bed lifting assembly through the fifth rotating pair; the bed lifting assembly includes a main back beam, an inner cylinder, an upper cylinder and a lifting driving cylinder, the first end of the main back beam is connected to the first end of the supporting moving assembly through the first rotating pair, the inner cylinder is connected to the inner bottom wall of the main back beam through the first moving pair, the upper cylinder is connected to the inner cylinder through the main back beam slide groove through the protrusion consolidation, and the fixed end of the lifting driving cylinder is connected to the inner cylinder through the first rotating pair. The ninth rotating pair is connected to the inner cylinder wall of the inner cylinder, the telescopic rod of the lifting drive cylinder is connected to the second end of the main back beam through the tenth rotating pair, and the inner cylinder and the upper cylinder are driven to move by the lifting drive cylinder, so as to realize the lifting and lowering of the rehabilitation bed; the rehabilitation bed is driven by the pitch drive cylinder in the pitch mechanism, and a four-bar mechanism is formed through the cooperation of each connecting frame and the pitch connecting rod, and in cooperation with the spring telescopic rod, the rehabilitation bed can realize the switching of various postures such as sitting, lying, standing and lying, and the height of the rehabilitation bed can be adjusted by the bed lifting assembly.

[0006] Preferably, the supporting moving assembly includes a base, wheels, casters, legs and a supporting mechanism, the supporting mechanism includes auxiliary wheels, a tripod and a rotating handle, the tripod is connected to the base through a fifteenth rotating pair, the auxiliary wheels are arranged below the tripod, the rotating handle is arranged below the base through a sixteenth rotating pair, the axes of the fifteenth rotating pair and the sixteenth rotating pair are parallel to the axis of the first rotating pair, in a lying state, the supporting mechanism is lowered, and in a standing or sitting moving state, the supporting mechanism is lifted up and embedded in both sides of the base.

[0007] Preferably, the pitch mechanism also includes a third connecting frame and a pitch link, the first end of the third connecting frame is connected to the first end of the second connecting frame through an eighth rotation pair, the first end of the pitch link is connected to the second end of the first connecting frame through a twenty-third rotation pair, and the second end of the pitch link is connected to the middle part of the third connecting frame through a twenty-fourth rotation pair.

[0008] Preferably, the sitting posture adjustment assembly includes a seat plate and a sitting posture adjustment cylinder, the first end of the seat plate is connected to the first end of the upper tube through an eleventh rotating pair, the telescopic end of the sitting posture adjustment cylinder is connected to the inside of the upper tube through a twelfth rotating pair, the fixed end of the sitting posture adjustment cylinder is connected to the bottom of the seat plate through a thirteenth rotating pair, and the sitting posture adjustment cylinder drives the seat plate to achieve its adjustment of 0 to 90 degrees.

[0009] Preferably, the armrest adjustment assembly includes an armrest tube, a first rocker, a second rocker and a locking block, the bottom end of the armrest tube is connected to the outer side of the upper tube through an eighteenth rotation pair, the first end of the first rocker is connected to the outer side of the upper tube through a seventeenth rotation pair, the first end of the second rocker is connected to the second end of the first rocker through a nineteenth rotation pair, the second end of the second rocker is connected to the middle part of the armrest tube through a twentieth rotation pair, the locking block is connected to the armrest tube through a second movable pair, the armrest tube and the wearable lower limb device are locked through the locking block, and the wearable lower limb device is set at the bottom of the bed in the initial lying state through the armrest adjustment assembly.

[0010] Preferably, the bed footboard connected to the sitting posture adjustment assembly is slidably arranged in the seat board through a protruding structure, and the bed footboard is rotated downward through a fourteenth rotating pair so that the front end of the push plate is embedded in the second end of the upper cylinder.

[0011] Preferably, the axes of the first rotational pair, the ninth rotational pair, the tenth rotational pair, the eleventh rotational pair, the twelfth rotational pair, the thirteenth rotational pair, the fourteenth rotational pair, the eighteenth rotational pair, the nineteenth rotational pair, the eighth rotational pair, the twenty-third rotational pair and the twenty-fourth rotational pair are all parallel to each other.

[0012] Preferably, the first moving secondary axis is perpendicular to the bottom end surface of the supporting moving component, the first moving secondary axis is perpendicular to the first rotating secondary axis, and the second moving secondary axis is perpendicular to the first moving secondary axis.

[0013] Preferably, the process of switching between sitting, lying, standing and lying positions of the rehabilitation bed is as follows: the locking block in the armrest adjustment assembly is moved outward to separate the armrest tube and the wearable lower limb device, so that the armrest adjustment assembly and the wearable lower limb device are arranged at the bottom of the bed, thereby realizing the transfer in the lying state; after the footboard is manually removed, the pitch drive cylinder is retracted to drive the main back beam to move, and then pull the entire bed lifting assembly; at the same time, the sitting position adjustment cylinder is retracted to drive the seat board to move, so that the seat board is -15° with the bed surface, thereby realizing the switching of the rehabilitation bed from lying position to standing position; the sitting position adjustment cylinder is extended to drive the seat board to move, so that the seat board is 90° with the bed surface, thereby realizing the switching from standing position to sitting position.

[0014] Compared with the prior art, the present invention has the following advantages:

[0015] 1. The multi-posture foldable rehabilitation bed capable of switching and adjusting of the present invention forms a four-bar mechanism through a base, a first connecting frame, a second connecting frame and a main back beam, a spring telescopic rod acts on the main back beam and the first connecting frame, and in the initial stage of tilting up, the first connecting frame, the second connecting frame and the base form an N-shaped folding state, the first connecting frame, the second connecting frame and the spring telescopic rod are all folded outside the base, the pitch drive cylinder is placed in the bottom space of the base and is connected to the main back beam at the pitch rotation axis, and the pitch drive cylinder is assisted with a small lever arm in a narrow space to achieve the ultimate turning assistance of low-power driving of the rehabilitation bed.

[0016] 2. The multi-posture foldable rehabilitation bed of the present invention can be switched and adjusted. Through the setting of the pitch mechanism, the bed lifting component and the sitting posture adjustment component, it can realize the switching of various rehabilitation postures such as sitting, lying, standing and lying. It can realize walking training in the standing state and transfer the user in the lying and sitting states. It is easy to use and meets the needs of multi-scenario rehabilitation training.

[0017] 3. The multi-posture foldable rehabilitation bed of the present invention can be switched and adjusted. A planar four-bar mechanism is formed by the armrest tube, two rockers and a locking block of the armrest adjustment assembly. The second rocker and the armrest tube are locked by the locking block, so that the mechanical legs can be extended and fixed for use, and can be folded to the bottom of the bed in a lying state, which is convenient for transportation. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is an overall schematic diagram of the multi-position foldable rehabilitation bed capable of switching and adjusting according to the present invention;

[0019] Figure 2 It is a schematic diagram of the structure of the coordination of the components in the multi-position foldable rehabilitation bed capable of switching and adjusting according to the present invention;

[0020] Figure 3 It is a structural schematic diagram of the cooperation between the bed lifting assembly and the sitting posture adjustment assembly in the present invention;

[0021] Figure 4 It is a structural schematic diagram of the armrest adjustment assembly in the present invention;

[0022] Figure 5 It is a schematic diagram of each kinematic pair in the multi-posture foldable rehabilitation bed capable of switching and adjusting according to the present invention;

[0023] Figure 6 A diagram showing the sitting posture of the switchable and adjustable multi-posture foldable rehabilitation bed of the present invention;

[0024] Figure 7 A diagram showing the standing posture of the multi-posture foldable rehabilitation bed capable of switching and adjusting according to the present invention;

[0025] Figure 8 This is a diagram of the lying posture of the switchable and adjustable multi-posture foldable rehabilitation bed of the present invention.

[0026] Reference numerals:

[0027] Support moving assembly 1, base 101, wheel 102, caster 103, leg 104, support mechanism 105, auxiliary wheel 106, tripod 107, rotating handle 108, pitch mechanism 2, first connecting frame 201, second connecting frame 202, spring telescopic rod 203, pitch drive cylinder 204, third connecting frame 206, pitch connecting rod 207, bed lifting assembly 3, main back beam 301, inner cylinder 302, upper cylinder 303, lifting drive cylinder 304, sitting posture adjustment assembly 4, seat board 401, sitting posture adjustment cylinder 402, bed footboard 5, armrest adjustment assembly 6, armrest cylinder 601, first rocker 602, second rocker 6 03, locking block 604, first rotating pair R1, second rotating pair R2, fifth rotating pair R5, sixth rotating pair R6, seventh rotating pair R7, eighth rotating pair R8, ninth rotating pair R9, tenth rotating pair R10, eleventh rotating pair R11, twelfth rotating pair R12, thirteenth rotating pair R13, fourteenth rotating pair R14, fifteenth rotating pair R15, sixteenth rotating pair R16, seventeenth rotating pair R17, eighteenth rotating pair R18, nineteenth rotating pair R19, twentieth rotating pair R20, twenty-third rotating pair R23, twenty-fourth rotating pair R24, first movable pair P1, second movable pair P2. DETAILED DESCRIPTION

[0028] In order to fully describe the technical content, structural features, objectives and effects of the present invention, the following will be described in detail with reference to the accompanying drawings.

[0029] The present invention can switch and adjust the multi-position folding rehabilitation bed, such as Figure 1As shown, it includes a supporting moving component 1, a pitch mechanism 2, a bed lifting component 3, a sitting posture adjustment component 4, a bed footboard 5 and an armrest adjustment component 6. The pitch drive cylinder 204 of the pitch mechanism 2 is connected to the base 101 of the supporting moving component 1, the pitch mechanism 2 is located below the bed lifting component 3, the second connecting frame 202 of the pitch mechanism 2 is connected to the main back beam 301 of the bed lifting component 3, and the main back beam 301 is connected to the base 101, the seat board 401 of the sitting posture adjustment component 4 is connected to the upper cylinder 303 of the bed lifting component 3, the bed footboard 5 is rotatably connected to the sitting posture adjustment component 4, and the armrest adjustment mechanism 6 is symmetrically arranged on both sides of the bed lifting component 3.

[0030] like Figure 2As shown, the supporting moving assembly 1 includes a base 101, wheels 102, casters 103, legs 104 and a supporting mechanism 105. The supporting mechanism 105 includes auxiliary wheels 106, a tripod 107 and a rotating handle 108. The tripod 107 is connected to the base 101 through a fifteenth rotating pair R15. The auxiliary wheels 106 are arranged below the tripod 107. The rotating handle 108 is arranged below the base 101 through a sixteenth rotating pair R16. The fifteenth rotating pair R15 and the sixteenth rotating pair R16 are parallel to the first rotating pair R1. In a lying state, the supporting mechanism 105 is put down to increase the stability of the rehabilitation bed. In a standing or sitting moving state, the supporting mechanism 105 is lifted up and embedded on both sides of the base 101 for easy movement. The pitch mechanism 2 includes a first connecting frame 201, a second connecting frame 202, a spring telescopic rod 203, a pitch drive cylinder 204, a third connecting frame 206 and a pitch link 207. The first end of the first connecting frame 201 is connected to the upper end of the base 101 through the second rotation pair R2, the first end of the second connecting frame 202 is connected to the second end of the first connecting frame 201 through the sixth rotation pair R6, the telescopic end of the spring telescopic rod 203 is connected to the middle of the main back beam 301 of the bed lifting assembly 3 through the seventh rotation pair R7, the fixed end of the spring telescopic rod 203 is connected to the middle of the second connecting frame 202 through the eighth rotation pair R8, the telescopic rod of the pitch drive cylinder 204 is connected to the middle of the main back beam 301 in the bed lifting assembly 3 through the fifth rotation pair R5 The first end of the third connecting frame 206 is connected to the first end of the second connecting frame 202 through the eighth rotation pair R8, the first end of the pitch link 207 is connected to the second end of the first connecting frame 201 through the twenty-third rotation pair R23, and the second end of the pitch link 207 is connected to the middle part of the third connecting frame 206 through the twenty-fourth rotation pair R24; through the cooperation of the first connecting frame 201, the second connecting frame 202 and the spring telescopic rod 203, it can assist the pitch drive cylinder 204 to provide an upward force to pull up the bed body in the initial stage of tilting up, and provide a backward pulling force in the later stage to prevent the bed body from tipping over, thereby achieving multiple auxiliary effects, realizing extreme directional assistance for the rehabilitation bed, increasing structural stability, and reducing the output power of the pitch drive. Driven by the pitch drive cylinder 204 in the pitch mechanism 2, the rehabilitation bed forms a four-bar mechanism through the base 101, the first connecting frame 201, the second connecting frame 202 and the main back beam 301, and cooperates with the spring telescopic rod 203 to achieve switching of the rehabilitation bed to a variety of postures such as sitting, lying, standing and lying, and the height of the rehabilitation bed can be adjusted through the bed lifting assembly 3.

[0031] like Figure 3As shown, the bed lifting assembly 3 includes a main back beam 301, an inner cylinder 302, an upper cylinder 303 and a lifting drive cylinder 304. The first end of the main back beam 301 is connected to the first end of the supporting movable assembly 1 through a first rotating pair R1, the inner cylinder 302 is connected to the inner bottom wall of the main back beam 301 through a first movable pair P1, the upper cylinder 303 is connected to the inner cylinder 302 through the main back beam 301 slide groove through the projection consolidation, the fixed end of the lifting drive cylinder 304 is connected to the inner cylinder wall of the inner cylinder 302 through the ninth rotating pair R9, and the telescopic rod of the lifting drive cylinder 304 is connected to the second end of the main back beam 301 through the tenth rotating pair R10. In the standing state, the lifting drive cylinder 304 is extended and retracted to drive the lifting of the bed connected to the inner cylinder 302 so as to adapt to users of different heights. The sitting posture adjustment component 4 includes a seat plate 401 and a sitting posture adjustment cylinder 402. The first end of the seat plate 401 is connected to the first end of the upper tube 303 through the eleventh rotation pair R11, the telescopic end of the sitting posture adjustment cylinder 402 is connected to the inside of the upper tube 303 through the twelfth rotation pair R12, the fixed end of the sitting posture adjustment cylinder 402 is connected to the bottom of the seat plate 401 through the thirteenth rotation pair R13, and the sitting posture adjustment cylinder 402 drives the seat plate 401 to achieve its 0-90° adjustment. The bed footboard 5 connected to the sitting posture adjustment component 4 is slidably arranged in the seat plate 401 through a raised structure, and the bed footboard 5 is rotated downward through the fourteenth rotation pair R14 so that the head end of the push plate is embedded in the second end of the upper tube 303.

[0032] like Figure 4 As shown, the armrest adjustment assembly 6 includes an armrest tube 601, a first rocker 602, a second rocker 603 and a locking block 604. The bottom end of the armrest tube 601 is connected to the outer side of the upper tube 303 through the eighteenth rotation pair R18, the first end of the first rocker 602 is connected to the outer side of the upper tube 303 through the seventeenth rotation pair R17, the first end of the second rocker 603 is connected to the second end of the first rocker 602 through the nineteenth rotation pair R19, the second end of the second rocker 603 is connected to the middle part of the armrest tube 601 through the twentieth rotation pair R20, the locking block 604 is connected to the armrest tube 601 through the second mobile pair P2, the armrest tube 601 and the wearable lower limb device are locked through the locking block 604, and the wearable lower limb device is set at the bottom of the bed in the initial lying state through the armrest adjustment assembly 6 to facilitate the user to transfer up and down.

[0033] like Figure 5As shown, the axes of the first rotation pair R1, the ninth rotation pair R9, the tenth rotation pair R10, the eleventh rotation pair R11, the twelfth rotation pair R12, the thirteenth rotation pair R13, the fourteenth rotation pair R14, the eighteenth rotation pair R18, the nineteenth rotation pair R19, the eighth rotation pair R8, the twenty-third rotation pair R23 and the twenty-fourth rotation pair R24 ​​are parallel to each other. The axis of the first moving pair P1 is perpendicular to the bottom end surface of the supporting moving component 1, and the axis of the first moving pair P1 is perpendicular to the axis of the first rotation pair R1, and the axis of the second moving pair P2 is perpendicular to the axis of the first moving pair P1.

[0034] The following is a further description of the switchable and adjustable multi-position foldable rehabilitation bed of the present invention in conjunction with the embodiments:

[0035] like Figure 6 to Figure 8 As shown in the figure, the switching process of the rehabilitation bed's sitting, lying, standing and lying postures is as follows:

[0036] By moving the locking block 604 in the armrest adjustment assembly 6 outward, the armrest tube 601 and the wearable lower limb device are separated, so that the armrest adjustment assembly 6 and the wearable lower limb device are all arranged at the bottom of the bed, thereby realizing the transfer of users in a lying state. After manually removing the footboard 5, the pitch drive cylinder 204 is retracted to drive the main back beam 301 to move, thereby pulling the entire bed lifting assembly 3, and at the same time, the sitting position adjustment cylinder 402 is retracted to drive the seat plate 401 to move, so that the seat plate and the bed surface are at -15°, thereby realizing the switching of the rehabilitation bed from a lying position to a standing position. The sitting position adjustment cylinder 402 is extended to drive the seat plate 401 to move, so that the seat plate 401 and the bed surface are at 90°, thereby realizing the switching from a standing position to a sitting position.

[0037] The multi-posture foldable rehabilitation bed of the present invention can be switched and adjusted. Through the cooperation of the first connecting frame 201, the second connecting frame 202 and the spring telescopic rod 203 in the pitch mechanism 2, it can not only assist the pitch drive cylinder 204 to provide an upward force to pull up the bed body in the initial stage of tilting up, but also provide a backward pulling force to prevent the bed body from tipping over in the later stage, thereby achieving multiple auxiliary effects, realizing the extreme directional assistance of the rehabilitation bed, and reducing the output power of the pitch drive. Under the drive of the pitch drive cylinder 204, a four-bar mechanism is formed by the base 101, the first connecting frame 201, the second connecting frame 202 and the main back beam 301, and in cooperation with the spring telescopic rod 203, the rehabilitation bed can be switched between multiple postures such as sitting, lying, standing and lying.

[0038] The embodiments described above are only descriptions of the preferred implementation modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. A multi-position foldable rehabilitation bed capable of switching and adjusting, characterized in that: It includes a support moving component, a pitch mechanism, a bed lifting component, a sitting posture adjustment component and an armrest adjustment component. The pitch drive cylinder of the pitch mechanism is connected to the base of the support moving assembly, the pitch mechanism is located below the bed lifting assembly, the second connecting frame of the pitch mechanism is connected to the main back beam of the bed lifting assembly, and the main back beam is connected to the base, the seat plate of the sitting posture adjustment assembly is connected to the upper cylinder of the bed lifting assembly, the footboard is rotatably connected to the sitting posture adjustment assembly, and the armrest adjustment mechanism is symmetrically arranged on both sides of the bed lifting assembly; The pitch mechanism comprises a first connecting frame, a second connecting frame, a spring telescopic rod and a pitch driving cylinder, wherein the first end of the first connecting frame is connected to the upper end of the base through a second rotating pair, the first end of the second connecting frame is connected to the second end of the first connecting frame through a sixth rotating pair, the telescopic end of the spring telescopic rod is connected to the middle part of the main back beam of the bed lifting assembly through a seventh rotating pair, the fixed end of the spring telescopic rod is connected to the middle part of the second connecting frame through an eighth rotating pair, and the telescopic rod of the pitch driving cylinder is connected to the first end of the main back beam in the bed lifting assembly through a fifth rotating pair; The bed lifting assembly comprises a main back beam, an inner cylinder, an upper cylinder and a lifting drive cylinder. The first end of the main back beam is connected to the first end of the supporting movable assembly through a first rotating pair. The inner cylinder is connected to the inner bottom wall of the main back beam through a first moving pair. The upper cylinder is connected to the inner cylinder through a projection fixed through the main back beam slide groove. The fixed end of the lifting drive cylinder is connected to the inner cylinder wall of the inner cylinder through a ninth rotating pair. The telescopic rod of the lifting drive cylinder is connected to the second end of the main back beam through a tenth rotating pair. The lifting drive cylinder drives the inner cylinder and the upper cylinder to move, thereby realizing the lifting of the rehabilitation bed. The rehabilitation bed, driven by the pitch drive cylinder in the pitch mechanism, forms a four-bar mechanism through the base, the first connecting frame, the second connecting frame and the main back beam, and cooperates with the spring telescopic rod to achieve switching of the rehabilitation bed to a variety of postures such as sitting, lying, standing and lying, and the height of the rehabilitation bed can be adjusted by the bed lifting assembly.

2. The switchable and adjustable multi-position foldable rehabilitation bed according to claim 1 is characterized in that: The supporting moving assembly includes a base, wheels, casters, legs and a supporting mechanism, the supporting mechanism includes auxiliary wheels, a tripod and a rotating handle, the tripod is connected to the base through a fifteenth rotating pair, the auxiliary wheels are arranged below the tripod, the rotating handle is arranged below the base through a sixteenth rotating pair, the axes of the fifteenth rotating pair and the sixteenth rotating pair are parallel to the axis of the first rotating pair, in a lying state, the supporting mechanism is put down, and in a standing or sitting moving state, the supporting mechanism is lifted up and embedded in both sides of the base.

3. The switchable and adjustable multi-position foldable rehabilitation bed according to claim 1 is characterized in that: The pitch mechanism also includes a third connecting frame and a pitch connecting rod, the first end of the third connecting frame is connected to the first end of the second connecting frame through an eighth rotation pair, the first end of the pitch connecting rod is connected to the second end of the first connecting frame through a twenty-third rotation pair, and the second end of the pitch connecting rod is connected to the middle part of the third connecting frame through a twenty-fourth rotation pair.

4. The switchable and adjustable multi-position foldable rehabilitation bed according to claim 1 is characterized in that: The sitting posture adjustment assembly includes a seat plate and a sitting posture adjustment cylinder, the first end of the seat plate is connected to the first end of the upper tube through an eleventh rotating pair, the telescopic end of the sitting posture adjustment cylinder is connected to the inside of the upper tube through a twelfth rotating pair, the fixed end of the sitting posture adjustment cylinder is connected to the bottom of the seat plate through a thirteenth rotating pair, and the sitting posture adjustment cylinder drives the seat plate to achieve an adjustment of 0 to 90 degrees.

5. The switchable and adjustable multi-position foldable rehabilitation bed according to claim 1 is characterized in that: The armrest adjustment assembly includes an armrest tube, a first rocker, a second rocker and a locking block. The bottom end of the armrest tube is connected to the outer side of the upper tube through an eighteenth rotation pair, the first end of the first rocker is connected to the outer side of the upper tube through a seventeenth rotation pair, the first end of the second rocker is connected to the second end of the first rocker through a nineteenth rotation pair, the second end of the second rocker is connected to the middle part of the armrest tube through a twentieth rotation pair, the locking block is connected to the armrest tube through a second movable pair, the armrest tube and the wearable lower limb device are locked through the locking block, and the wearable lower limb device is set at the bottom of the bed in the initial lying state through the armrest adjustment assembly.

6. The switchable and adjustable multi-position foldable rehabilitation bed according to claim 1, characterized in that: The bed footboard connected to the sitting posture adjustment component is slidably arranged in the seat board through a protruding structure, and the bed footboard is rotated downward through the fourteenth rotating pair so that the first end of the push plate is embedded in the second end of the upper cylinder.

7. The switchable and adjustable multi-position foldable rehabilitation bed according to claim 5, characterized in that: The axes of the first rotation pair, the ninth rotation pair, the tenth rotation pair, the eleventh rotation pair, the twelfth rotation pair, the thirteenth rotation pair, the fourteenth rotation pair, the eighteenth rotation pair, the nineteenth rotation pair, the eighth rotation pair, the twenty-third rotation pair and the twenty-fourth rotation pair are all parallel to each other.

8. The switchable and adjustable multi-position foldable rehabilitation bed according to claim 5, characterized in that: The first moving secondary axis is perpendicular to the bottom end surface of the supporting moving component, and the first moving secondary axis is perpendicular to the first rotating secondary axis, and the second moving secondary axis is perpendicular to the first moving secondary axis.

9. The switchable and adjustable multi-position foldable rehabilitation bed according to claim 1, characterized in that: The process of switching between sitting, lying, standing and lying positions of the rehabilitation bed is as follows: the locking block in the armrest adjustment assembly is moved outward to separate the armrest tube and the wearable lower limb device, so that the armrest adjustment assembly and the wearable lower limb device are arranged at the bottom of the bed, thereby realizing the transfer in the lying state; after manually removing the footboard, the pitch drive cylinder is retracted to drive the main back beam to move, and then pull the entire bed lifting assembly; at the same time, the sitting position adjustment cylinder is retracted to drive the seat board to move, so that the seat board is -15° with the bed surface, thereby realizing the switching of the rehabilitation bed from lying position to standing position; the sitting position adjustment cylinder is extended to drive the seat board to move, so that the seat board is 90° with the bed surface, thereby realizing the switching from standing position to sitting position.

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