Multifunctional wheelchair bed

Abstract

The invention relates to the technical field of nursing equipment, and discloses a multifunctional wheelchair bed which provides more comfortable nursing experience for a user and is flexible and easy in action. Comprising a middle moving structure, a front moving structure is installed at the front end of the middle moving structure, a rear moving structure is installed at the rear end of the middle moving structure, and the rear moving structure can be overturned and folded in the direction of the middle moving structure; a front seat plate structure capable of being overturned in the direction of the front moving structure or the middle moving structure and a rear backup plate structure capable of being overturned in the direction of the rear moving structure or the middle moving structure are arranged on the middle moving structure, so that a plane state, a vertical plane state or a V-shaped plane state is formed between the front seat plate structure and the rear backup plate structure; the left end and the right end of the front seat plate structure and the left end and the right end of the rear backup plate structure are each provided with two sets of side folding plate structures, and the state structures of the side folding plate structures can be changed along with state change of the front seat plate structure and the rear backup plate structure.

Description

Technical Field

[0001] The present invention relates to the technical field of nursing equipment, and more particularly, to a multifunctional wheelchair bed. Background Art

[0002] In the field of medical care and rehabilitation assistance equipment, the wheelchair bed, as an important instrument with both wheelchair mobility function and hospital bed bearing function, is widely used in hospitals, elderly care institutions, and home care scenarios. Most of the existing wheelchair beds adopt a modular design, simply combining the moving system and the bearing system, and it is difficult to meet the diverse body position needs of patients such as sitting and lying through morphological transformation.

[0003] A more prominent problem lies in the design of the turning-over function of the existing wheelchair beds; traditional wheelchair beds generally adopt the back-pushing turning-over method, and the turning-over action is achieved by directly applying force against the user's back through the turning-over structure. This method not only causes extrusion and friction to the user's back, easily leading to skin damage and discomfort, increasing the risk of pressure sores, but also there is a safety hazard that the user may slip or get injured due to uneven force during the turning-over process, and it is difficult to ensure the comfort and safety of the user. Summary of the Invention

[0004] The purpose of the present invention is to solve the problems raised in the above background art, and then a multifunctional wheelchair bed is proposed.

[0005] The technical solution adopted by the present invention to solve its technical problems is as follows:

[0006] A multifunctional wheelchair bed includes a central moving structure, a front moving structure is installed at the front end of the central moving structure, a rear moving structure is installed at the rear end of the central moving structure, and the rear moving structure can be turned and folded along the direction of the central moving structure; a front seat plate structure and a rear backrest structure are respectively arranged on the central moving structure, the front seat plate structure can be turned along the direction of the front moving structure or the central moving structure, and the rear backrest structure can be turned along the direction of the rear moving structure or the central moving structure; and the front seat plate structure and the rear backrest structure can be independent or linked, so that a flat state, a vertical state, or a V-shaped state is formed between the front seat plate structure and the rear backrest structure, and two sets of side folding plate structures are installed at each of the left and right ends of the front seat plate structure and the rear backrest structure, and the side folding plate structures can change their own state structures as the states of the front seat plate structure and the rear backrest structure change.

[0007] Further, in the flat state, the front seat plate structure is carried on the front moving structure, and the rear backrest structure is carried on the rear moving structure.

[0008] Further, the front seat plate structure includes a seat plate, one end of the seat plate is turnably connected to the central moving structure, and a seat plate electric push rod is arranged between the seat plate and the front moving structure.

[0009] In the above solution, further, a defecation opening for the user to defecate is provided in the middle of the seat board.

[0010] In the above solution, further, the rear backrest structure includes a backrest. One end of the backrest is rotatably connected to the middle moving structure, and an electric push rod for the backrest is provided on the back of the backrest. The electric push rod for the backrest is connected to the connection points of the backrest and the middle moving structure.

[0011] In the above solution, further, the rear backrest structure includes a backrest. One end of the backrest is rotatably connected to the middle moving structure, and an electric push rod for the backrest is provided on the back of the backrest. The electric push rod for the backrest is connected to the middle moving structure.

[0012] In the above solution, further, the rear moving structure includes a first bracket. One end of the first bracket is connected to the middle moving structure, and the other end is connected to a lifting electric push rod provided on the middle moving structure. A rotating seat is connected to the connection shaft of the lifting electric push rod and the first bracket through a hook. The rotating seat is arranged on a second bracket. One end of the second bracket is rotatably connected to the first bracket, and a third bracket is installed on the second bracket. A universal wheel is installed on the third bracket.

[0013] In the above solution, further, a roller for contacting the backrest is also installed on the third bracket.

[0014] In the above solution, further, after the universal wheel contacts the ground, the second bracket abuts against the bottom end of the lifting electric push rod to form a self-locking structure.

[0015] In the above solution, further, the side folding plate structure includes a first flat plate. One end of the first flat plate is rotatably connected and arranged, and the other end is rotatably connected to a second flat plate. A sliding rod is provided on the second flat plate. A sliding block is slidably matched on the sliding rod. The sliding block is connected to a fixed rod fixedly arranged through a connecting rod. When the sliding block moves to the outer end limit of the sliding rod, the first flat plate and the second flat plate are in an unfolded state. When the sliding block moves to the inner end limit of the sliding rod, the first flat plate and the second flat plate are in a stored state.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] The present invention meets diverse needs. Through the linkage flipping and state switching of various structures, the wheelchair bed can freely convert between the bed form and the wheelchair form, adapting to the diverse needs of users in different scenarios, and combining the functions of lying in bed and moving around, thus enhancing the practicality and versatility of the device. Moreover, in terms of the user's turning-over operation, this wheelchair bed breaks through the traditional back-pushing turning-over method and innovatively adopts the rotary turning-over principle. By the mutual cooperation of the front seat plate structure and the rear backrest structure, the rotary turning-over method is used to avoid direct extrusion and friction on the user's back, greatly reducing the discomfort and risk of skin damage that may occur during the turning-over process, providing a more comfortable nursing experience for the user, with flexible and easy movements, and reducing the nursing difficulty. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0019] Figure 2 is a schematic diagram of the installation position of the front seat plate structure;

[0020] Figure 3 is a schematic diagram of the installation position of the rear backrest structure;

[0021] Figure 4 is a schematic diagram of the different state structures of the seat plate and the backrest;

[0022] Figure 5 is Figure 2 a partial enlarged schematic diagram of A in

[0023] Figure 6 is Figure 3 a partial enlarged schematic diagram of B in

[0024] Figure 7 is a schematic diagram of the overall structure of the rear moving structure;

[0025] Figure 8 is a schematic diagram of the overall structure of the side folding plate structure;

[0026] Wherein: 1, middle moving structure; 2, front moving structure; 3, rear moving structure; 31, bracket one; 32, lifting electric push rod; 33, hook; 34, rotating seat; 35, bracket two; 36, bracket three; 37, universal wheel; 38, roller; 4, front seat plate structure; 41, seat plate; 411, defecation port; 42, seat plate electric push rod; 5, rear backrest structure; 51, backrest; 52, backrest electric push rod; 6, side folding plate structure; 61, flat plate one; 62, flat plate two; 63, sliding rod; 64, slider; 65, fixed rod; 66, connecting rod. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0027] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention. The present invention will be further described in conjunction with the accompanying drawings and embodiments:

[0028] A multifunctional wheelchair bed, referring to the attached Figure 1 - attached Figure 8 As shown, its core moving system is composed of a central moving structure 1, a front moving structure 2, and a rear moving structure 3. Among them, the central moving structure 1 adopts a mature electric drive wheel type or crawler type drive solution in the industry as the main power source to provide driving power for the wheelchair bed; the front moving structure 2 is installed at the front end of the central moving structure 1 and is composed of a frame and moving wheels, mainly undertaking the functions of support and steering; since the above two structures both belong to the prior art, no detailed expansion will be made here; among them, the rear moving structure 3 is installed at the rear end of the central moving structure 1 and has the function of flipping and folding along the direction of the central moving structure 1. When in the unfolded state, this structure contacts the ground to assist in realizing support and movement, and after folding, it can effectively save space and is convenient for storage and transportation;

[0029] In terms of the bearing system, a front seat plate structure 4 and a rear backrest structure 5 are respectively arranged on the central moving structure 1; the front seat plate structure 4 can flip along the direction of the front moving structure 2 or the central moving structure 1, and the rear backrest structure 5 can flip along the direction of the rear moving structure 3 or the central moving structure 1. These two structures can be operated independently or can also achieve linkage control. By precisely adjusting their relative positions and angles, different states such as a plane, a vertical plane, or a V-shaped plane can be formed between the front seat plate structure 4 and the rear backrest structure 5. And in the plane state, the front seat plate structure 4 is stably carried on the front moving structure 2, and the rear backrest structure 5 is stably carried on the rear moving structure 3 to form a complete and flat bearing surface;

[0030] In addition, at the left and right ends of the front seat plate structure 4 and the rear backrest structure 5, two groups of side folding plate structures 6 are respectively equipped. The four groups of side folding plate structures 6 can flexibly adjust their own state structures according to the state changes of the front seat plate structure 4 and the rear backrest structure 5, so as to realize the flexible switching of the wheelchair bed between the bed form and the wheelchair form.

[0031] The core technology of the present invention lies in the deep integration of modular structure design and intelligent linkage flipping mechanism; the central moving structure 1 serves as the power core, adopting mature electric drive wheel or crawler drive technology to provide stable and reliable moving ability for the wheelchair bed. The front moving structure 2 undertakes the functions of support and steering to ensure flexible maneuverability during the moving process. The rear moving structure 3 is innovatively designed to be axially flipped and folded along the central moving structure 1. When unfolded, it contacts the ground to assist in bearing and enhance moving stability. When stored, it folds upward, significantly reducing the occupied space and improving the space adaptability of the device;

[0032] In the bearing system, both the front seat plate structure 4 and the rear backrest structure 5 have flipping functions and can be flexibly rotated along the corresponding front moving structure 2, rear moving structure 3 or central moving structure 1 directions. They can be operated independently or linked through an intelligent control system. By precisely adjusting the flipping angle and direction, the free switching between the plane state, vertical plane state, and V-shaped plane state between the front seat plate structure 4 and the rear backrest structure 5 can be realized. When in the plane state, the front seat plate structure 4 is stably mounted on the front moving structure 2, and the rear backrest structure 5 closely cooperates with the rear moving structure 3 to jointly construct a flat and excellent load-bearing plane. The side folding plate structures 6 at both ends will complete the unfolding or storage actions according to the state changes of the front seat plate structure 4 and the rear backrest structure 5, thereby realizing the efficient conversion between the wheelchair bed in the bed form and the wheelchair form. And in the bed form, the user lies flat on the front seat plate structure 4 and the two groups of side folding plate structures 6, or the rear backrest structure 5 and the two groups of side folding plate structures 6;

[0033] Particularly prominent is that in the scenario of the wheelchair bed realizing the user's turning over, the traditional back-pushing turning method is abandoned, and the rotary turning principle is innovatively adopted. Taking the user lying supine on the front seat plate structure 4 as an example, when turning over is needed, the rear backrest structure 5 rotates towards the central moving structure 1 direction until it forms a vertical plane state with the front seat plate structure 4. At this time, the front seat plate structure 4 smoothly flips towards the central moving structure 1 direction, and at the same time, the rear backrest structure 5 smoothly flips towards the rear moving structure 3 direction, that is, the overall vertical plane state flips (as shown in the attached Figure 4 figure, the changing state between the front seat plate structure 4 and the rear backrest structure 6 gradually changes from state one to state four), and finally, by using the gravity effect, the user is naturally and smoothly rotated and transferred from the front seat plate structure 4 to the rear backrest structure 5. Reverse operation can achieve turning over on the other side. The entire turning-over process is completely completed by the rotational movements between the structures, without directly touching the user's back throughout the process, avoiding problems such as extrusion and friction that may be caused to the user by the traditional method, significantly reducing the intensity of nursing operations, and at the same time greatly improving the comfort and safety of the user.

[0034] For the above solution, specifically, referring to the attachedFigure 2 and attached Figure 5 As shown, the front seat plate structure 4 includes a seat plate 41. A defecation opening 411 for the user to defecate is provided in the middle of the seat plate 41. One end of the seat plate 41 is rotatably connected to the middle moving structure 1, and a seat plate electric push rod 42 is arranged between the seat plate 41 and the front moving structure 2.

[0035] Among them, one end of the seat plate 41 is rotatably connected to the middle moving structure 1. This connection provides the basic degree of freedom for the flipping movement of the seat plate 41, enabling the seat plate 41 to rotate around the connection point. The setting of the seat plate electric push rod 42 is the key component to realize the controllable flipping of the seat plate 41. The seat plate electric push rod 42 changes the angle between the seat plate 41 and the middle moving structure 1 through telescopic movement; when constructing the bed body plane, the seat plate 41 and the backrest plate 51 are flipped to the horizontal position synchronously to form a continuous and flat bearing surface; when converted into the wheelchair form, the seat plate 41 and the backrest plate 51 are respectively adjusted to appropriate inclination angles to construct an ergonomic sitting posture support structure; and in the assisted turning operation, the two are flipped at different angles to form a smooth transition surface to ensure that the user can complete the body position change safely and comfortably, fully meeting the functional requirements of the wheelchair bed in different usage scenarios; for example, when it is necessary to realize the deflection action of the seat plate 41, the seat plate electric push rod 42 extends, pushing the seat plate 41 to flip around the connection point with the middle moving structure 1 towards the rear moving structure 3 until reaching the predetermined angle; by controlling the telescopic amount of the seat plate electric push rod 42, the seat plate 41 can be flipped at different angles, and in cooperation with the linkage of the rear backrest plate structure 5, the switching between the plane, vertical plane or V-shaped plane states of the front seat plate structure 4 and the rear backrest plate structure 5 can be achieved to meet the diverse functional requirements of the wheelchair bed.

[0036] For the above solution, specifically, referring to the attached Figure 3 and attached Figure 5 and attached Figure 6 As shown, the rear backrest plate structure 5 includes a backrest plate 51. The backrest plate 51 is carried on the rear moving structure 3 in the bed state and acts as a backrest in the wheelchair state. One end of the backrest plate 51 is rotatably connected to the middle moving structure 1, and a backrest plate electric push rod 52 is arranged on the back of the backrest plate 51. The backrest plate electric push rod 52 is connected to the connection point between the backrest plate 51 and the middle moving structure 1 (which can achieve a larger flipping range), or connected to the middle moving structure 1 (which can enhance the overall rigidity of the structure).

[0037] Among them, the rear backrest structure 5 takes the backrest 51 as the core component. Through the flip connection with the middle moving structure 1 and the drive of the backrest electric push rod 52, one end of the backrest 51 is flip-connected to the middle moving structure 1 to form a rotatable basic structure. The backrest electric push rod 52 arranged on the back of the backrest 51 is the power source for realizing the movement. In the bed state, the backrest electric push rod 52 contracts, pulling the backrest 51 to flip downward so that it is stably carried on the rear moving structure 3 and jointly constitutes a flat bed surface with the front seat plate 41. When in the wheelchair state, the backrest electric push rod 52 extends, pushing the backrest 51 to flip upward so that it stands up as a backrest to provide back support for the user. In operations such as assisting in turning over, the backrest electric push rod 52 can also precisely control the flipping angle of the backrest 51 and cooperate with the front seat plate structure 4 to realize the safe transfer of the user. Through the telescopic change of the backrest electric push rod 52 and in combination with the connection relationship between the backrest 51 and the moving structure, the rear backrest structure 5 can flexibly complete the state switching under different functional requirements.

[0038] For the above solution, specifically, referring to FIGS. 3 and the attached Figure 7 As shown, the rear moving structure 3 includes a first bracket 31. One end of the first bracket 31 is connected to the middle moving structure 1, and the other end is connected to a lifting electric push rod 32 arranged on the middle moving structure 1. A rotating seat 34 is connected to the connection shaft of the lifting electric push rod 32 and the first bracket 31 through a hook 33. The rotating seat 34 is arranged on a second bracket 35. One end of the second bracket 35 is rotatably connected to the first bracket 31, and a third bracket 36 is installed on the second bracket 35. When stored, the third bracket 36 fits against the backrest 51, and a universal wheel 37 is installed on the third bracket 36. A roller 38 for contacting the backrest 51 is also installed on the third bracket 36 (during the position adjustment process of the backrest 51, a small amount of displacement will occur. By using the roller 38 to contact it, the friction between the two can be reduced).

[0039] Among them, the rear mobile structure 3 realizes the support, movement, storage and friction reduction functions through clever mechanical connection and power design; the bracket 1 31 serves as a connection hub, one end of which is connected to the middle mobile structure 1, and the other end is connected to the lifting electric push rod 32, and is connected to the rotating seat 34 through a hook 33, and the rotating seat 34 is fixed on the bracket 2 35, so that the bracket 2 35 can be flexibly rotated relative to the bracket 1 31, and the bracket 36 is installed on the bracket 2 35, and the universal wheel 37 equipped thereon provides the wheelchair bed with movement and steering capabilities; the lifting electric push rod 32 is the power core of the rear mobile structure 3, and its telescopic action drives the bracket 2 35 to flip, and when extended, the bracket 2 35 drives the bracket 3 36 and the universal wheel 37 descends, so that the universal wheel 37 contacts the ground, assisting the movement of the wheelchair bed; when retracted, the bracket two 35 drives the bracket three 36 and the universal wheel 37 to flip upward and fold on the back of the backboard 51, saving space for easy storage; the rotating seat 34 connected with the hook 33 not only ensures the effective transmission of power, but also facilitates the disassembly and assembly between the bracket two 35 and the bracket one 31. When loosened, the bracket two 35 drives the bracket three 36 and the universal wheel 37 to flip freely and flexibly; in addition, the roller 38 on the bracket three 36 contacts the backboard 51, and when the backboard 51 adjusts its angle, the sliding friction is converted into rolling friction, thereby reducing wear and reducing the driving force required to adjust the backboard 51, thereby ensuring smooth movement of the backboard 51.

[0040] In addition, refer to the attached Figure 7 As shown, when the universal wheel 37 contacts the ground, the bracket 2 35 abuts against the bottom end of the lifting electric push rod 32 to form a self-locking structure to prevent the universal wheel 37 from shaking greatly in the supported state. The bottom end of the lifting electric push rod 32 abuts against the bracket 2 35, so that the lifting electric push rod 32 locks the flipping direction of the bracket 2 35.

[0041] In the process, the lifting electric push rod 32 drives the bracket 2 35 to flip, so that the universal wheel 37 contacts the ground, and the end of the bracket 2 35 will abut against the bottom end of the lifting electric push rod 32. A matching limiting surface design is adopted here, and the bracket 2 35 and the bottom end of the electric push rod form a large area of rigid abutment, which limits the displacement of the bracket 2 35 from a geometric level, and then constrains the movement of the bracket 2 35. When the lock needs to be released, the lifting electric push rod 32 is energized and reversely contracted, driving the bracket 2 35 out of the conflicting state, thereby realizing structural unlocking. The whole process is easy to operate and has high reliability.

[0042] For the above scheme, specifically, refer to 1 and attached Figure 8As shown, the side folding plate structure 6 includes a first flat plate 61. One end of the first flat plate 61 is rotatably connected, and the other end is rotatably connected to a second flat plate 62. A sliding rod 63 is provided on the second flat plate 62, and a slider 64 is slidably engaged with the sliding rod 63. The slider 64 is connected to a fixed rod 65 fixedly arranged through a connecting rod 66. When the slider 64 moves to the outer end limit of the sliding rod 63, the first flat plate 61 and the second flat plate 62 are in an unfolded state. When the slider 64 moves to the inner end limit of the sliding rod 63, the first flat plate 61 and the second flat plate 62 are in a stored state.

[0043] Among them, the side folding plate structure 6 realizes the flexible switching and stable maintenance of the unfolded and stored states through a unique design of the transmission and flipping connection of the connecting rod 66 and the slider 64. The first flat plate 61 and the second flat plate form a foldable basic structure through the flipping connection. The sliding rod 63, the slider 64, the connecting rod 66 and the fixed rod 65 form a transmission mechanism to control the opening and closing states of the two. When the slider 64 moves outward along the sliding rod 63 to the limit position, the connecting rod 66 pulls the second flat plate 62 to flip around the connection point and unfold together with the first flat plate 61 to expand the bearing area and meet the usage requirements of the bed body. When the slider 64 moves inward to the limit of the sliding rod 63, the second flat plate 62 flips and folds to fit the first flat plate 61 and enters the stored state. In the stored state, if a force is applied to push the first flat plate 61 outward, due to the mechanical properties between the connecting rod and the slider, this force will be converted into a vertically downward force, making the first flat plate 61 and the second flat plate 62 tightly fit the front seat plate structure 4 or the rear backrest structure 5, forming a wedging effect to ensure the stability of the folding structure and prevent accidental unfolding. This design takes into account both the usage convenience and the structural stability, providing reliable support for the functional expansion of the wheelchair bed in different forms.

[0044] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art of this industry should understand that the present invention is not limited by the above embodiments. The above embodiments and the descriptions in the specification only illustrate the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of protection required by the present invention. The scope of protection required by the present invention is defined by the appended claims and their equivalents.

Claims

1. A multi-functional wheelchair bed, including a central moving structure (1), with a front moving structure (2) installed at the front end of the central moving structure (1), characterized in that: A rear moving structure (3) is installed at the rear end of the central moving structure (1), and the rear moving structure (3) can be flipped and folded along the direction of the central moving structure (1); A front seat plate structure (4) and a rear backrest structure (5) are respectively arranged on the central moving structure (1). The front seat plate structure (4) can be flipped along the direction of the front moving structure (2) or the central moving structure (1), and the rear backrest structure (5) can be flipped along the direction of the rear moving structure (3) or the central moving structure (1); The front seat plate structure (4) and the rear backrest structure (5) can be independent or linked, so that a flat state, a vertical state or a V-shaped state is formed between the front seat plate structure (4) and the rear backrest structure (5); And two groups of side folding plate structures (6) are installed at both the left and right ends of the front seat plate structure (4) and the rear backrest structure (5). The side folding plate structures (6) can change their own state structures as the states of the front seat plate structure (4) and the rear backrest structure (5) change.

2. The multi-functional wheelchair bed according to claim 1, characterized in that: In the flat state, the front seat plate structure (4) is carried on the front moving structure (2), and the rear backrest structure (5) is carried on the rear moving structure (3).

3. The multi-functional wheelchair bed according to claim 2, characterized in that: The front seat plate structure (4) includes a seat plate (41). One end of the seat plate (41) is flip-connected to the central moving structure (1), and a seat plate electric push rod (42) is arranged between the seat plate (41) and the front moving structure (2).

4. The multi-functional wheelchair bed according to claim 3, characterized in that: A defecation opening (411) for the user to defecate is provided in the middle of the seat plate (41).

5. The multi-functional wheelchair bed according to claim 4, characterized in that: The rear backrest structure (5) includes a backrest (51). One end of the backrest (51) is flip-connected to the central moving structure (1), and a backrest electric push rod (52) is arranged on the back of the backrest (51). The backrest electric push rod (52) is connected to the connection points of the backrest (51) and the central moving structure (1).

6. The multi-functional wheelchair bed according to claim 4, characterized in that: The rear backrest structure (5) includes a backrest (51). One end of the backrest (51) is flip-connected to the central moving structure (1), and a backrest electric push rod (52) is arranged on the back of the backrest (51). The backrest electric push rod (52) is connected to the central moving structure (1).

7. The multi-functional wheelchair bed according to claim 5 or 6, characterized in that: The rear moving structure (3) includes a first bracket (31). One end of the first bracket (31) is connected to the middle moving structure (1), and the other end is connected to a lifting electric push rod (32) arranged on the middle moving structure (1). A rotating seat (34) is connected to the connection shaft of the lifting electric push rod (32) and the first bracket (31) through a hook (33). The rotating seat (34) is arranged on a second bracket (35). One end of the second bracket (35) is rotatably connected to the first bracket (31), and a third bracket (36) is installed on the second bracket (35). A universal wheel (37) is installed on the third bracket (36).

8. A multifunctional wheelchair bed according to claim 7, characterized in that: A roller (38) for contacting the backrest plate (51) is further installed on the third bracket (36).

9. A multifunctional wheelchair bed according to claim 8, characterized in that: After the universal wheel (37) contacts the ground, the second bracket (35) abuts against the bottom end of the lifting electric push rod (32) to form a self-locking structure.

10. A multifunctional wheelchair bed according to claim 9, characterized in that: The side folding plate structure (6) includes a first flat plate (61). One end of the first flat plate (61) is flip-connected, and the other end is flip-connected to a second flat plate (62). A sliding rod (63) is provided on the second flat plate (62). A slider (64) is slidably engaged with the sliding rod (63). A connecting rod (66) is connected between the slider (64) and a fixed rod (65) fixedly arranged, so that when the slider (64) moves to the outer end limit of the sliding rod (63), the first flat plate (61) and the second flat plate (62) are in an unfolded state, and when the slider (64) moves to the inner end limit of the sliding rod (63), the first flat plate (61) and the second flat plate (62) are in a stored state.

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