A foldable back and leg lift assist device with double back and leg retraction

Abstract

This utility model belongs to the field of back and leg support, specifically a foldable back and leg lifting assistive device with double retraction. It addresses the problems of existing devices being bulky and inconvenient to transport and install; the risk of elderly people grabbing the backboard when it lowers to its lowest point due to fear; the common problem of most products on the market being ordinary back and leg lifting devices, which generate a pushing force that detracts from the user experience; and the limitation of being usable only on a bed. The proposed solution includes a back lifting base and a leg bending base. The foldable design facilitates transport and eliminates the need for installation. It can be used simply by unfolding and connecting to power. The width of the back lifting base is smaller than the width of the backboard to prevent hand pinching when it lowers. The double retraction of the back and legs means that the backboard and legs move backward during the lifting process to prevent the user from being pushed downward. It also includes a space for installing the legs, allowing it to be placed on the floor and used as a smart bed.

Description

Technical Field

[0001] This utility model relates to the field of back and leg support technology, and in particular to a back and leg double retraction foldable back and leg lifting assist device. Background Technology

[0002] In real life, many special groups, such as patients who are weak after surgery, paralyzed patients, and patients with gastrointestinal problems, require family members to help them sit up for easier care, and sometimes even lift their legs. Currently, many homes or nursing homes lack back-raising and leg-lifting functions, requiring caregivers to help patients up, which is strenuous, exhausting, and can easily cause secondary injuries. Pregnant women and the elderly also have difficulty getting out of bed and need external assistance. This is where back-raising and leg-lifting aids come in. They can be placed directly on the bed for use, taking up minimal space. They feature electric back-raising and leg-lifting functions, making it convenient for caring for patients and assisting the elderly in getting out of bed.

[0003] The existing products on the market have many drawbacks: 1. They are bulky and inconvenient to transport and install; 2. When the backrest is lowered, the elderly may grab it with their hands out of fear, which may cause their hands to be pinched when it is lowered to the lowest point; 3. Most products on the market are ordinary back and leg lifts, which will generate a pushing force that pushes the person downwards, affecting the user experience and is extremely unfriendly to the elderly and paralyzed patients; 4. They can only be placed on the bed and cannot be used alone, limiting the use environment. Utility Model Content

[0004] The purpose of this utility model is to solve the following problems in the existing technology: 1. Large size, inconvenient for transportation and installation; 2. When the back panel is lowered, the elderly may grab the back panel out of fear, which may cause their hands to be pinched when it is lowered to the lowest point; 3. Most products on the market are ordinary back and leg raising devices, which will generate a pushing force that pushes the person downwards during the process, affecting the user experience and is extremely unfriendly to the elderly and paralyzed patients; 4. They can only be placed on the bed and cannot be used alone, resulting in a limited usage environment. Therefore, this utility model proposes a double-retractable foldable back and leg raising assistive device.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A back and leg double retraction foldable back and leg lifting assistant includes a back lifting base frame and a leg bending base frame. A back plate is provided on the upper part of the back lifting base frame, and a thigh plate and a calf plate are provided on the upper part of the leg bending base frame. The thigh plate and the calf plate are hinged together. A back lifting shaft assembly is provided on the back lifting base frame. When it is necessary to lift the back, the back plate can be driven to rotate through the back lifting shaft assembly.

[0007] To enable leg raising, a leg bending axis assembly is also included, which drives the thigh plate and calf plate to move when leg bending is required.

[0008] In one possible design, the lifting axle assembly includes a lifting axle, a first drive member, two lifting arms, and two first U-shaped brackets. One end of each of the two lifting arms is welded to one end of one side of the lifting axle. One side of each of the two first U-shaped brackets is welded to one end of each of the two lifting arms. A common first roller is rotatably connected to the inner walls of both sides of the first U-shaped brackets. Both ends of the lifting axle are rotatably connected to the inner walls of both sides of the lifting base frame. A connecting frame is welded to one side of the lifting axle, and a first hinge seat is welded to the inner wall of one side of the lifting base frame. The fixing part of the first drive member is connected to the first hinge... The connecting seat is hinged to the telescopic part and the connecting frame. The first roller is in contact with one side of the back plate. A first inclined plate is welded to one side of the back plate. A first sliding track is welded to the back lifting base frame. A first bearing is slidably connected in the first sliding track. A first connecting rod is fixedly installed on the inner wall of the inner ring of the first bearing. One end of the first connecting rod is fixedly connected to one side of the first inclined plate. A second hinge seat is fixedly installed on one side of the first sliding track. A back lifting pull rod is hinged to the second hinge seat. A third hinge seat is fixedly installed on the inner wall of one side of the back plate. One end of the back lifting pull rod is hinged to the third hinge seat.

[0009] In one possible design, the curved leg shaft assembly includes a second drive member, a leg-raising pivot, two leg-raising arms, a second connecting frame, and two second U-shaped frames. A fourth hinge seat is welded to one side of the curved leg base. The fixed part of the second drive member is hinged to the fourth hinge seat. Both ends of the leg-raising pivot are rotatably connected to the inner walls of both sides of the curved leg base. One end of each of the two leg-raising arms is welded to one end of one side of the leg-raising pivot. One side of the second connecting frame is welded to one side of the leg-raising pivot. The telescopic part of the second drive member is hinged to the second connecting frame. One side of each of the two second U-shaped frames is welded to one end of each of the two leg-raising arms. The two sides of the second U-shaped frames... The inner wall is rotatably connected to the same second roller. Both sides of the inner wall of the curved leg base are hinged with lifting rods. One end of each lifting rod is hinged to one side of the lower leg plate. A first inclined plate is welded to one side of the thigh plate. A second sliding rail is welded to the curved leg base. A second bearing is slidably connected in the second sliding rail. A second connecting rod is fixedly installed on the inner wall of the inner ring of the second bearing. One end of the second connecting rod is fixedly connected to one side of the second inclined plate. A fifth hinge seat is fixedly installed on one side of the second sliding rail. A curved leg rod is hinged to the fifth hinge seat. A sixth hinge seat is welded to one side of the inner wall of the thigh plate. The curved leg rod is hinged to the sixth hinge seat.

[0010] In one possible design, guardrails are welded to both sides of the top of the back panel.

[0011] In one possible design, a first nylon bushing and a second nylon bushing are respectively provided on the back-raising shaft and the leg-raising shaft to reduce noise.

[0012] In one possible design, a hip plate is placed on the top of one end of the backrest frame and the top of one end of the flexor frame.

[0013] In one possible design, two U-shaped plates are provided between the backrest underframe and the curved leg underframe, located on both sides, and the U-shaped plates are bolted to the backrest underframe and the curved leg underframe.

[0014] In this application, when the backrest needs to be raised, the first driving component is activated, and the telescopic part of the driving component extends outward, pushing the connecting frame to rotate around the backrest lifting shaft. The backrest lifting shaft drives the two backrest lifting arms to rotate, and the first U-shaped frame moves accordingly. The first roller rolls along the bottom surface of the back panel, pushing the back panel upward. During the back panel's upward movement, the backrest lifting lever drives the first bearing to slide within the first track, thus moving the back panel backward. When the legs need to be raised, the second driving component is activated, and the telescopic part of the driving component extends outward, pushing the second connecting frame to rotate around the leg lifting shaft. The leg lifting shaft drives the two leg lifting arms to rotate, and the second U-shaped frame moves accordingly. The second roller rolls along the bottom surface of the thigh plate, pushing the thigh plate upward. During the thigh plate's upward movement, the leg bending lever pulls the first... Two bearings slide within the second track to move the thigh plate backward. Since one end of the lower leg frame is hinged to the thigh frame and the other end to the lifting rod, and the other end of the lifting rod is hinged to the curved leg base frame, the thigh frame rises, causing the lower leg frame to rise as well. The backrest base frame and the curved leg base frame are connected by a sheet metal piece (U-shaped plate) and can be folded (by loosening the bolts connecting the U-shaped plate to the backrest base frame and the curved leg base frame, separating them). The U-shaped plate (which has mounting holes on both the U-shaped plate and the backrest base frame and the curved leg base frame for easy installation of bolts and nuts) is used to fix the relative positions of the backrest base frame and the curved leg base frame. After separation, they can be folded independently. By screwing out the support legs onto the backrest base frame and the curved leg base frame, it can be used as a bed. Figure 1 As shown, the bottom of the backrest base and the curved leg base are provided with mounting holes to facilitate the installation of the outriggers. The first and second drive components are both electric push rods, which require an external controller and external power supply for operation. The width of the backrest base is smaller than the width of the back plate to ensure that the back plate will not pinch your hands when it falls. The double retraction of the back and legs means that the back plate and legs will move backward during the ascent to prevent the back and legs from pushing the person downward during the ascent.

[0015] The beneficial effects of this utility model are as follows:

[0016] In this utility model, the foldable design makes it convenient to transport and requires no installation. When in use, it can be unfolded and connected to power. The width of the back frame is smaller than the width of the back panel, ensuring that the back panel will not pinch your hands when it is lowered. The double retraction of the back legs means that the back panel and legs will move backward during the lifting process to prevent the back legs from pushing the person downward. There are reserved positions for installing the legs. After the legs are installed, it can be placed on the ground and used as a smart bed. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the installation support leg structure of a double-retractable foldable back and leg lifting auxiliary device proposed in this utility model.

[0018] Figure 2 This is a schematic diagram of the uninstalled support leg structure of a double-retractable foldable back and leg lifting auxiliary device proposed in this utility model;

[0019] Figure 3 This is a schematic diagram of the back-lifting shaft assembly structure of a back-leg double-retractable foldable back-lifting and leg-raising auxiliary device proposed in this utility model;

[0020] Figure 4 This is a schematic diagram of the curved leg shaft assembly structure of a double-retractable foldable back and leg lifting aid proposed in this utility model;

[0021] Figure 5 This is a schematic diagram of the first part of the back and leg double retraction foldable back and leg lifting auxiliary device proposed in this utility model;

[0022] Figure 6 This is a schematic diagram of the second part of the back and leg double retraction foldable back and leg lifting auxiliary device proposed in this utility model;

[0023] Figure 7 This is a side view of the installation support leg structure of a back-leg double retraction foldable back-lifting and leg-raising auxiliary device proposed in this utility model.

[0024] In the diagram: 1. Back panel; 2. Guardrail; 3. Hip panel; 4. Thigh panel; 5. Lower leg panel; 6. Lifting rod; 7. Leg-bending base frame; 8. Leg-bending shaft assembly; 9. Leg-bending pull rod; 10. U-shaped plate; 11. Backrest lifting pull rod; 12. Backrest lifting shaft assembly; 13. Backrest lifting base frame; 14. Backrest lifting support arm; 15. Backrest lifting pivot; 16. Connecting frame; 17. First nylon bushing; 18. First U-shaped frame; 19. Leg-bending support arm; 20. Leg-bending pivot; 21. Second nylon bushing; 22. Second U-shaped frame; 23. First driving component; 24. Second driving component; 25. First sliding rail. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0026] In one embodiment: Refer to Figure 1-7An auxiliary device includes a backrest base 13 and a leg-bending base 7, which are connected by two U-shaped plates 10. A back plate 1 is mounted on top of the backrest base 13, and a thigh plate 4 and a calf plate 5 are mounted on top of the leg-bending base 7. The thigh plate 4 and the calf plate 5 are connected by hinges to achieve linkage when raising the leg. A backrest shaft assembly 12 is mounted on the backrest base 13 to drive the back plate 1 to rotate; a leg-bending shaft assembly 8 is mounted on the leg-bending base 7 to drive the thigh plate 4 and the calf plate 5 to move.

[0027] The liftback axle assembly 12 includes a liftback pivot 15, a first drive member 23, two liftback support arms 14, and two first U-shaped frames 18. The two ends of the liftback pivot 15 are rotatably connected to the liftback base frame 13. One end of each liftback support arm 14 is welded to the liftback pivot 15, and the other end is welded to the first U-shaped frame 18. A first roller is rotatably connected inside the first U-shaped frame 18, contacting the back plate 1. The fixed part of the first drive member 23 is hinged to the liftback base frame 13, and the telescopic part is hinged to the connecting frame 16 on the liftback pivot 15.

[0028] When the backrest needs to be raised, the telescopic part of the first drive member 23 extends, pushing the connecting frame 16 to rotate around the backrest lifting shaft 15, which in turn moves the backrest lifting arm 14 and the first U-shaped frame 18. The first roller rolls along the bottom surface of the backrest plate 1, pushing the backrest plate 1 to rise. At the same time, the backrest lifting rod 11 on one side of the backrest plate 1 slides through the first bearing in the first sliding rail 25, realizing the rearward movement of the backrest plate 1.

[0029] The leg-raising shaft assembly 8 includes a leg-raising pivot 20, a second drive component 24, two leg-raising support arms 19, and two second U-shaped frames 22. The two ends of the leg-raising pivot 20 are rotatably connected to the leg-raising base frame 7. One end of each leg-raising support arm 19 is welded to the leg-raising pivot 20, and the other end is welded to the second U-shaped frame 22. A second roller is rotatably connected inside the second U-shaped frame 22, contacting the thigh plate 4. The fixed part of the second drive component 24 is hinged to the leg-raising base frame 7, and the telescopic part is hinged to the second connecting frame on the leg-raising pivot 20.

[0030] When the leg needs to be raised, the telescopic part of the second drive component 24 extends, pushing the second connecting frame to rotate around the leg-raising pivot 20, which in turn moves the leg-raising support arm 19 and the second U-shaped frame 22. The second roller rolls along the bottom surface of the thigh plate 4, pushing the thigh plate 4 upward. At the same time, the curved leg lever 9 on one side of the thigh plate 4 slides through the second bearing in the second sliding track, realizing the rearward movement of the thigh plate 4. The calf plate 5 is hinged to the curved leg base frame 7 through the lifting lever 6, and the calf plate 5 rises synchronously when the thigh plate 4 rises.

[0031] This application is for the field of back and leg support, but can also be used in other fields applicable to this application.

[0032] In another embodiment: Reference Figure 1-7 A foldable back and leg lifting assistive device with double retraction is used in the field of back and leg assistance.

[0033] The width of the backrest base 13 is smaller than the width of the backplate 1 to ensure that the backplate 1 will not contact the base when it is lowered, thus avoiding the risk of pinching hands. Guardrails 2 are welded to both sides of the top of the backplate 1 to prevent users from accidentally slipping or putting their hands into the mechanical parts.

[0034] The backrest hinge 15 and the leg hinge 20 are respectively provided with a first nylon bushing 17 and a second nylon bushing 21 to reduce metal friction noise and improve user comfort.

[0035] The top of one end of the backrest base 13 and the leg-bending base 7 is fitted with a hip plate 3, which provides comfortable hip support for the user.

[0036] The U-shaped plate 10 is connected to the backrest base 13 and the curved leg base 7 by bolts, thus securing the two. When folding is required, the bolts are loosened, the U-shaped plate 10 is removed, and the backrest base 13 and the curved leg base 7 can be folded independently for easy transportation and storage.

[0037] The bottom of the backrest base 13 and the curved leg base 7 has pre-drilled holes for mounting legs, allowing the device to be placed on the ground and used as a smart bed. If it needs to be used with an existing bed, the legs can be removed and the device can be placed directly on the bed.

[0038] Both the first drive component 23 and the second drive component 24 are electric actuators, controlled by an external controller. This caters to the needs of different users.

[0039] However, as is well known to those skilled in the art, the working principles and wiring methods of the first driving component 23 and the second driving component 24 are commonplace and belong to conventional means or common knowledge. They will not be described in detail here. Those skilled in the art can make any selections according to their needs or convenience.

[0040] The accompanying drawings in this application are for illustrative purposes only. The dimensions and shapes of the components shown are not actual limitations but are merely schematic representations. In actual implementation, the components can be reasonably configured and adjusted according to specific needs and actual conditions.

[0041] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A foldable back and leg lifting aid with double retraction, characterized in that, It includes a backrest base frame (13) and a curved leg base frame (7). A back plate (1) is provided on the top of the backrest base frame (13). A thigh plate (4) and a calf plate (5) are provided on the top of the curved leg base frame (7). The thigh plate (4) and the calf plate (5) are hinged together. A backrest shaft assembly (12) is provided on the backrest base frame (13). When it is necessary to lift the backrest, the back plate (1) can be driven to rotate through the backrest shaft assembly (12). For leg raising, a leg bending shaft assembly (8) is also included. When leg bending is required, the leg bending shaft assembly (8) can drive the thigh plate (4) and calf plate (5) to move. The back-raising shaft assembly (12) includes a back-raising pivot (15), a first drive member (23), two back-raising support arms (14), and two first U-shaped frames (18). One end of each of the two back-raising support arms (14) is welded to one end of each of the two back-raising support arms (14). One side of each of the two first U-shaped frames (18) is welded to one end of each of the two back-raising support arms (14). The same first roller is rotatably connected to the inner walls of both sides of the first U-shaped frame (18). The two ends of the back-raising pivot (15) are rotatably connected to the inner walls of both sides of the back-raising base frame (13). A connecting frame (16) is welded to one side of the lifting shaft (15), and a first hinge seat is welded to the inner wall of one side of the lifting base frame (13). The fixed part of the first driving member (23) is hinged to the first hinge seat, and the telescopic part is hinged to the connecting frame (16). The first roller is in contact with one side of the back plate (1). A first inclined plate is welded to one side of the back plate (1). A first sliding track (25) is welded on the lifting base frame (13). A first bearing is slidably connected inside the first sliding track (25). A first connecting rod is fixedly installed on the inner wall of the inner ring of the first bearing. One end of the first connecting rod is fixedly connected to one side of the first inclined plate. A second hinge seat is fixedly installed on one side of the first sliding track (25). A first connecting rod is hinged on the second hinge seat. The backrest pull rod (11) has a third hinge seat fixedly installed on one side of the inner wall of the back plate (1). One end of the backrest pull rod (11) is hinged to the third hinge seat. The leg shaft assembly (8) includes a second drive member (24), a leg-raising shaft (20), two leg-raising arms (19), a second connecting frame, and two second U-shaped frames (22). A fourth hinge seat is welded to one side of the leg-raising base frame (7). The fixed part of the second drive member (24) is hinged to the fourth hinge seat. The two ends of the leg-raising shaft (20) are rotatably connected to the inner walls of both sides of the leg-raising base frame (7). One end of each of the two leg-raising arms (19) is welded to one end of the leg-raising shaft (20). One side of the second connecting frame is connected to the leg-raising shaft (20). The two U-shaped frames (22) are welded together on one side. The telescopic part of the second drive component (24) is hinged to the second connecting frame. One side of each of the two second U-shaped frames (22) is welded to one end of each of the two leg-raising arms (19). The inner walls of both sides of the second U-shaped frame (22) are rotatably connected to the same second roller. The inner walls of both sides of the curved leg base frame (7) are hinged to lifting rods (6). One end of each of the two lifting rods (6) is hinged to one side of the lower leg plate (5). One side of the thigh plate (4) is welded to a first inclined plate. The curved leg base frame (7) is welded to a second sliding rail. A second bearing is slidably connected inside the second sliding rail. A second connecting rod is fixedly installed on the inner wall of the inner ring of the second bearing. One end of the second connecting rod is fixedly connected to one side of the second inclined plate.A fifth hinge seat is fixedly installed on one side of the second sliding track, and a curved leg rod (9) is hinged to the fifth hinge seat. A sixth hinge seat is welded to the inner wall of one side of the thigh plate (4), and the curved leg rod (9) is hinged to the sixth hinge seat.

2. The back and leg double retraction foldable back and leg lifting assistive device according to claim 1, characterized in that, The back panel (1) has guardrails (2) welded to both sides of its top.

3. The back and leg double retraction foldable back and leg lifting aid according to claim 2, characterized in that, The back-raising pivot (15) and the leg-raising pivot (20) are respectively provided with a first nylon bushing (17) and a second nylon bushing (21) for reducing noise.

4. The back and leg double retraction foldable back and leg lifting assistive device according to claim 1, characterized in that, A hip plate (3) is placed on the top of one end of the backrest frame (13) and the top of one end of the leg frame (7).

5. The back and leg double retraction foldable back and leg lifting assistive device according to claim 1, characterized in that, Two U-shaped plates (10) are provided between the backrest base frame (13) and the curved leg base frame (7) and are located on both sides. The U-shaped plates (10) are installed on the backrest base frame (13) and the curved leg base frame (7) by bolts.

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