Multifunctional electric wheelchair

Abstract

The invention provides a multifunctional electric wheelchair, and belongs to the technical field of wheelchairs. The problem that a user of an existing wheelchair needs to be supported by other people is solved. The rear end of a pedal of the multifunctional electric wheelchair is hinged to a base, the front end of the pedal extends out of the base, the two ends of a seat plate are hinged to the base and the bottom end of a back plate respectively, the two ends of two armrests are hinged to the base and the bottom end of the back plate respectively, and the hinge points of the two ends of the two armrests are located above the hinge points of the two ends of the seat plate respectively. The bottom end of the supporting rod is hinged to the base, the two ends of the pulling piece are connected with the pedal and the supporting rod respectively, the pedal can enable the top end of the supporting rod to abut against the bottom face of the seat plate through the pulling piece, the elastic piece is arranged between the base and the seat plate, the two ends of the elastic piece act on the base and the seat plate respectively, and the elastic piece enables the seat plate to have the standing tendency all the time. The multifunctional electric wheelchair has the advantages of assisting in sitting up and enabling a user to sit up in a labor-saving mode.

Description

Technical Field

[0001] The present invention belongs to the technical field of wheelchairs and relates to a multifunctional electric wheelchair. Background Art

[0002] The elderly have slow and inconvenient leg and foot movements. The elderly and the disabled have an increasingly strong desire for independent living, especially independent travel. Therefore, the social demand for mobility aids is becoming more and more prosperous, and electric wheelchairs meet this demand of the elderly and the disabled.

[0003] Existing electric wheelchairs, for example, a Chinese patent document discloses a solar electric wheelchair [Patent No.: 201320055762.2; Publication No.: CN203042683U], which includes a wheelchair body, hub motors, a steering and speed control device, drive wheels and guide wheels. A storage battery powers the hub motors to drive the drive wheels to rotate. The solar electric wheelchair includes a solar panel, and the solar panel is disposed above the wheelchair body; the solar panel charges the storage battery through a controller to store electrical energy.

[0004] For the electric wheelchair with this structure, the first secondary battery panel group, the solar main battery panel group and the second secondary battery panel group are located at the top of the electric wheelchair, which can absorb solar energy for power generation and also play a role in shading. However, for the electric wheelchair with this structure, the wheelchair body and the footrest are integrally formed, that is, the wheelchair body and the footrest are a whole and fixed, and the position of the footrest is relatively high from the ground. This makes it necessary for the elderly to lift their legs higher when sitting in the wheelchair. Since the elderly themselves have inconvenient legs and feet, they still need to be assisted by others when sitting in this kind of electric wheelchair. At the same time, when the elderly get up from this kind of electric wheelchair, they need to hold the armrests with both hands and use their hands and feet and exert force all over their bodies to get up, or they need to be assisted by others, still requiring the assistance of others and unable to well meet the need for independent travel. Summary of the Invention

[0005] The purpose of the present invention is to address the above problems existing in the prior art and propose a multifunctional electric wheelchair, and the technical problem to be solved is how to enable the wheelchair to have a function of assisting in getting up and sitting down, so that the user can get up and sit down with less effort.

[0006] The object of the present invention can be achieved by the following technical solutions: A multifunctional electric wheelchair includes a base with universal wheels, pedals, a seat board, a back board, and two armrests arranged at intervals. It is characterized in that it further includes at least one support rod, a pulling member, and an elastic member. The rear end of the pedal is hinged to the base, and the front end extends outside the base. The two ends of the seat board are respectively hinged to the base and the bottom end of the back board. The two ends of the two armrests are respectively hinged to the base and the bottom end of the back board. The hinge points at the two ends of the two armrests are respectively located above the hinge points at the two ends of the seat board. The bottom end of the support rod is hinged to the base. The two ends of the pulling member are respectively connected to the pedal and the support rod. The pedal can make the top end of the support rod abut against the bottom surface of the seat board through the pulling member. The elastic member is arranged between the base and the seat board, and the two ends of the elastic member respectively act on the base and the seat board. The elastic member can make the seat board always have a tendency to stand up.

[0007] When the electric wheelchair is in the storage state, under the action of the elastic force of the elastic member and in cooperation with the gravity of the pedal itself, the seat board is pulled up through the pulling member. The seat board, the back board, the armrests, and the base are hinged to each other, so that the seat board, the back board, and the armrests can be folded and retracted, and the seat board, the back board, and the armrests are integrally erected on the base. When in use, the user steps on the pedals with both feet, and then the back and buttocks tilt backward and the buttocks sit down. The user's body moves backward as a whole. During this process, the user can overcome the elastic force of the elastic member by using the gravity of his own body, so that the seat board, the back board, and the armrests gradually open. During this process, the seat board pushes the support rod to rotate around the hinge point, and makes the pulling member pull the pedal, so that the pedal tilts up, so that the user sits down and the electric wheelchair opens to reach a force balance. The user is supported by the seat board and the back board to assist the user to sit down slowly. When the user gets up, the user's feet exert force downward and the body tilts forward and the buttocks lift up to get up. During this process, the elastic member pushes the seat board to stand up, and the pedal pulls the seat board to stand up through the pulling member. The standing up of the seat board can abut against and push the user's back and buttocks to assist the user to get up. This electric wheelchair has the function of assisting in getting up and sitting down, making it labor-saving for the user to get up and sit down, and there is no need for others to support, enabling the user to live and travel independently better. There are also limit blocks at the hinge points between the seat board, the back board, the armrests, and the base. When the seat board, the back board, and the armrests are fully opened, the limit blocks play a limiting role, so that the seat board, the back board, the armrests, and the base as a whole form a stable structure for the user to sit on.

[0008] In the above-mentioned multifunctional electric wheelchair, the pedal includes a connecting rod and a plate body in the shape of a flat plate. The front end of the connecting rod is fixedly connected to the plate body so that the pedal is in a T shape. The rear end of the connecting rod is hinged to the base. When the seat plate is erected in the vertical direction, the plate body abuts against the ground. When the seat plate is laid flat in the horizontal direction, the plate body leaves the ground and the front end is tilted upward. When the electric wheelchair is in the storage state, the plate body is in contact with the ground, and the user can easily step on the plate body without effort, which is suitable for the elderly with inconvenient legs and feet and does not require the support of others. When the electric wheelchair is in use, the plate body leaves the ground and the front end is tilted upward, so that the user's legs can get sufficient support, which conforms to ergonomics and improves the comfort of the user.

[0009] In the above-mentioned multifunctional electric wheelchair, the width of the plate body in the left-right direction of the electric wheelchair is the same as the width of the seat plate. This allows the user to place their feet arbitrarily, improving comfort. At the same time, the pedal has sufficient weight, which can better cooperate with the elastic member to realize the rotation of the seat plate and the back plate, and can better assist in getting up, making it easier for the user to get up and sit down.

[0010] In the above-mentioned multifunctional electric wheelchair, the base includes two spaced support plates that are inclined downward in the front-rear direction of the electric wheelchair. The bottom end of the support rod is embedded in the middle between the two support plates. The bottom end of the support rod is hinged to the two support plates. The top end of the support rod is hinged with a roller, and the roller can abut against the bottom surface of the seat plate. The support plates play a role in support and guidance, enabling the support rod to rotate in a set direction. The setting of the roller makes the contact between the support rod and the seat plate a rolling friction, making the relative movement between the support rod and the seat plate smooth and there is no problem of jamming.

[0011] In the above-mentioned multifunctional electric wheelchair, the pulling member is a chain and a sprocket. The sprocket is hinged at the front end between the two support plates. One end of the chain is fixedly connected to the pedal, and the other end is fixedly connected to the middle or top end of the support rod. The middle of the chain meshes with the sprocket. Through the cooperation of the chain and the sprocket, the linkage between the support rod and the pedal is realized, and the structure is simple.

[0012] As another case, in the above-mentioned multifunctional electric wheelchair, the pulling member is a pull rope and a pulley. The pulley is hinged at the front end between the two support plates. One end of the pull rope is fixedly connected to the pedal, and the other end is fixedly connected to the middle or top end of the support rod. The middle of the pull rope abuts against the pulley. Through the cooperation of the pull rope and the pulley, the linkage between the support rod and the pedal is realized, and the structure is simple.

[0013] In the above-mentioned multifunctional electric wheelchair, the seat board includes a cross bar at the front end. The elastic member is a torsion spring, and the number of the torsion springs is two. The two torsion springs are respectively sleeved at both ends of the cross bar. There are two protruding abutting rods on the base. One end of the torsion spring acts on the seat board, and the other end acts on the abutting rod. The individual torsion spring is relatively large and has sufficient and appropriate elastic force to ensure that the seat board can be pushed to rotate while preventing the seat board from rotating too fast.

[0014] As another case, in the above-mentioned multifunctional electric wheelchair, the elastic member is an elastic shrapnel, and the number of the shrapnels is two. There are two protruding abutting rods on the base. One end of the shrapnel acts on the seat board, and the other end acts on the abutting rod.

[0015] In the above-mentioned multifunctional electric wheelchair, the armrest is in a flat runway shape. The armrest includes a J-shaped support rod and a J-shaped walking stick. The support rod is fixedly connected to both the seat board and the back board. The support rod is located above the walking stick. The arc section of the support rod is located at the rear end of the armrest, and the arc section of the walking stick is located at the front end of the armrest. The walking stick is detachably fixedly connected to the support rod. With this structure, the armrest has two functions. First, when the electric wheelchair is unfolded, the user's hand can be placed on the armrest to play a supporting role. Second, when the electric wheelchair is erected, after the user gets up from the electric wheelchair, the walking stick can be removed so that the user can use it to support the body when walking; this walking stick is integrated into the armrest with a clever combination.

[0016] In the above-mentioned multifunctional electric wheelchair, the end of the arc section of the support rod has a first clamping joint, and the end of the straight section of the walking stick has a second clamping joint. After the first clamping joint and the second clamping joint are inserted into each other and rotate relatively, the support rod and the walking stick can be axially positioned. A first permanent magnet is fixedly connected to the end of the straight section of the support rod, and a second permanent magnet is fixedly connected to the end of the arc section of the walking stick. After the first permanent magnet and the second permanent magnet attract each other with opposite polarities, the support rod and the walking stick can be circumferentially positioned. Through the rotation and clamping connection of the first clamping joint and the second clamping joint for axial positioning, and through the attraction of the first permanent magnet and the second permanent magnet with opposite polarities for circumferential positioning, the walking stick is convenient to disassemble and assemble and convenient to use.

[0017] In the above-mentioned multifunctional electric wheelchair, the first clamping joint includes a first clamping groove that is recessed and annular in the end face of the arc section of the support rod and a plurality of first clamping pieces that are spaced in the first clamping groove, and there is a gap between the first clamping piece and the groove bottom and groove wall of the first clamping groove; the second clamping joint includes a second clamping groove that is recessed and annular in the end face of the straight section of the crutch and a plurality of second clamping pieces that are equally spaced and are arranged on the groove wall of the second clamping groove, and there is a gap between the second clamping piece and the groove bottom of the second clamping groove, and there is a avoidance space between the inner ends of all the second clamping pieces, and the first clamping piece can be inserted between two adjacent second clamping pieces, and the second clamping piece can be inserted between two adjacent first clamping pieces. The first clamping piece and the second clamping piece are first staggered and plugged, and then rotated to overlap the first clamping piece and the second clamping piece, so as to realize the axial positioning of the support rod and the crutch, and the positioning is convenient.

[0018] In the above-mentioned multifunctional electric wheelchair, the electric wheelchair also includes a battery compartment located at the rear end of the base for installing batteries. When the seat plate is laid flat in the horizontal direction, the seat plate abuts against the battery compartment. The battery compartment plays a role in supporting the seat plate when the seat plate is laid flat, so that the seat plate will not collapse when sitting, thereby improving the stability of the electric wheelchair and increasing the service life of the electric wheelchair. The battery compartment is used to store batteries to provide electricity. The electric wheelchair is driven by electricity and can move automatically, making it convenient for users to use.

[0019] In the above-mentioned multifunctional electric wheelchair, the electric wheelchair also includes a solar panel electrically connected to the battery in the battery compartment, the solar panel is hinged on the top of the back panel, when the seat panel is laid flat in the horizontal direction, the solar panel is located directly above the seat panel and there is a certain angle between the solar panel and the back panel, when the seat panel is erected in the vertical direction, the solar panel can be attached to the back of the back panel. For the user, the solar panel can be unfolded to absorb solar energy to supplement electricity and improve the endurance of the electric wheelchair. At the same time, the solar panel can play a role in sunshade and improve the comfort of the user.

[0020] In the above-mentioned multifunctional electric wheelchair, a waist protector and a neck protector are provided on the front of the back plate. The waist protector can protect the waist of the user, and the neck protector can protect the neck of the user, thereby improving the comfort of the user.

[0021] Compared with the prior art, the multifunctional electric wheelchair provided by the present invention has the following advantages:

[0022] 1. This electric wheelchair uses the elastic force of the elastic member in combination with the gravity of the pedal itself and the force exerted by the user stepping on the pedal, enabling the seat plate and the backrest to support the user, allowing the user to sit down slowly and get up with less effort. This electric wheelchair has the function of assisting in getting up and sitting down, making it easier for the user to get up and sit down without the need for someone else to support, enabling the user to live and travel independently better.

[0023] 2. The armrest of this electric wheelchair has two functions. One is to provide a place for the user's hand to rest and play a supporting role when the electric wheelchair is unfolded. The other is that when the electric wheelchair is erected, after the user gets up from the electric wheelchair, the crutch can be removed and used for support when the user is walking. This crutch is integrated into the armrest with a clever combination.

[0024] 3. This electric wheelchair is equipped with a solar panel, which not only plays a role in charging and improves the battery life of the electric wheelchair, but also can play a role in shading and improve the comfort of the user. Brief Description of the Drawings

[0025] Figure 1 is the state diagram of this electric wheelchair when it is unfolded.

[0026] Figure 2 is the state diagram of this electric wheelchair when it is erected.

[0027] Figure 3 is the structural schematic diagram of the seat plate, pedal and elastic member of this electric wheelchair.

[0028] Figure 4 is the structural schematic diagram of the support rod and the pulling member of this electric wheelchair.

[0029] Figure 5 is the enlarged view of the armrest and the first clamping joint of this electric wheelchair.

[0030] Figure 6 is the enlarged view of the armrest and the second clamping joint of this electric wheelchair.

[0031] In the figure, 1. Universal wheel; 2. Base; 21. Support plate; 22. Abutting rod; 3. Pedal; 31. Connecting rod; 32. Plate body; 4. Seat plate; 41. Cross bar; 5. Backrest; 6. Armrest; 61. Support rod; 62. Crutch; 63. First clamping joint; 631. First clamping groove; 632. First clamping piece; 64. Second clamping joint; 641. Second clamping groove; 642. Second clamping piece; 643. Avoidance space; 65. First permanent magnet; 66. Second permanent magnet; 7. Support rod; 71. Roller; 8. Pulling member; 81. Chain; 82. Sprocket; 9. Elastic member; 10. Battery compartment; 11. Solar panel; 12. Lumbar support; 13. Neck support. Detailed Description of the Invention

[0032] The following are specific embodiments of the present invention, in combination with the accompanying drawings, to further describe the technical solutions of the present invention, but the present invention is not limited to these embodiments.

[0033] Embodiment 1

[0034] As Figure 1 、 Figure 2 shown, this multifunctional electric wheelchair includes a base 2 with universal wheels 1, a pedal 3, a seat plate 4, a backrest 5, two spaced armrests 6, a support rod 7, a pulling member 8, an elastic member 9, a battery compartment 10, a solar panel 11, a lumbar support 12 and a neck support 13.

[0035] The pedal 3 includes a connecting rod 31 and a plate body 32 in the shape of a flat plate. The front end of the connecting rod 31 is fixedly connected to the plate body 32 so that the pedal 3 is in a T shape. The rear end of the connecting rod 31 is hinged to the base 2, and the front end extends out of the base 2. The width of the plate body 32 in the left-right direction of the electric wheelchair is the same as the width of the seat plate 4. When the seat plate 4 is erected in the vertical direction, the plate body 32 abuts against the ground. When the seat plate 4 is laid flat in the horizontal direction, the plate body 32 leaves the ground and the front end is tilted up.

[0036] Both ends of the seat plate 4 are respectively hinged to the base 2 and the bottom end of the backrest 5. Both ends of the two armrests 6 are respectively hinged to the base 2 and the bottom end of the backrest 5. The hinge points at both ends of the two armrests 6 are respectively located above the hinge points at both ends of the seat plate 4, and limit blocks are provided at the hinge points so that the pedal 3, the seat plate 4, the backrest 5 and the armrests 6 can be positioned relative to each other after being opened.

[0037] As Figure 3 、 Figure 4 shown, the base 2 includes two spaced support plates 21 that are inclined downward obliquely in the front-rear direction of the electric wheelchair. The bottom end of the support rod 7 is embedded in the middle between the two support plates 21. The bottom end of the support rod 7 is hinged to the two support plates 21. The top end of the support rod 7 is hinged with a roller 71, and the roller 71 can abut against the bottom surface of the seat plate 4. The pulling member 8 is a chain 81 and a sprocket 82. The sprocket 82 is hinged at the front end between the two support plates 21. In this embodiment, one end of the chain 81 is fixedly connected to the pedal 3 and the other end is fixedly connected to the middle of the support rod 7. The middle of the chain 81 is engaged with the sprocket 82. In actual production, the other end can be fixedly connected to the top end of the support rod 7.

[0038] The seat plate 4 includes a cross bar 41 at the front end. The elastic member 9 is a torsion spring. The number of torsion springs is two. The two torsion springs are respectively sleeved on both ends of the cross bar 41. There are two protruding abutting rods 22 on the base 2. One end of the torsion spring acts on the seat plate 4 and the other end acts on the abutting rod 22.

[0039] As Figure 5 、 Figure 6As shown, the armrest 6 is in a flat runway shape, and includes a J-shaped support rod 61 and a J-shaped crutch 62. The support rod 61 is located above the crutch 62, and the support rod 61 is fixedly connected to the seat plate 4 and the back plate 5. The arc section of the support rod 61 is located at the rear end of the armrest 6, and the arc section of the crutch 62 is located at the front end of the armrest 6. The crutch 62 is detachably fixedly connected to the support rod 61. Specifically, the end of the arc section of the support rod 61 has a first clamping joint 63, the first clamping joint 63 includes a first clamping groove 631 that is recessed and arranged on the end surface of the arc section of the support rod 61 and is annular, and three first clamping pieces 632 that are spaced apart in the first clamping groove 631, and there is a gap between the first clamping piece 632 and the groove bottom and groove wall of the first clamping groove 631. The end of the straight section of the crutch 62 has a second clamping joint 64, and the second clamping joint 64 includes a second clamping groove 641 that is recessed and arranged on the end surface of the straight section of the crutch 62 and is circular, and three first clamping pieces 632 that are spaced apart in the second clamping groove 631. The second clamping piece 642 on the wall of the connecting groove 641 has a gap between the second clamping piece 642 and the bottom of the second clamping groove 641, and there is an escape space 643 between the inner ends of all the second clamping pieces 642, the first clamping piece 632 can be embedded between two adjacent second clamping pieces 642, and the second clamping piece 642 can be embedded between two adjacent first clamping pieces 632, and then the first clamping joint 63 and the second clamping joint 64 are relatively rotated, so that the first clamping piece 632 and the second clamping piece 642 overlap each other, so that the support rod 61 and the crutch 62 are axially positioned. The end of the straight section of the support rod 61 is fixedly connected with a first permanent magnet 65, and the end of the arc section of the crutch 62 is fixedly connected with a second permanent magnet 66. After the first permanent magnet 65 and the second permanent magnet 66 attract each other, the support rod 61 and the crutch 62 can be circumferentially positioned.

[0040] The battery compartment 10 for installing the battery is located at the rear end of the base 2. When the seat plate 4 is laid flat in the horizontal direction, the seat plate 4 rests against the battery compartment 10. The solar panel 11 is electrically connected to the battery in the battery compartment 10. The solar panel 11 is hinged on the top of the back plate 5. When the seat plate 4 is laid flat in the horizontal direction, the solar panel 11 is located directly above the seat plate 4 and there is a certain angle between the solar panel 11 and the back plate 5. When the seat plate 4 is erected in the vertical direction, the solar panel 11 can rest against the back of the back plate 5. The front of the back plate 5 is provided with a waist guard 12 and a neck guard 13.

[0041] When the electric wheelchair is in the storage state, under the action of the elastic force of the elastic member 9 and in combination with the gravity of the pedal 3 itself, the seat plate 4, the backrest 5 and the armrest 6 are integrally erected on the base 2. When in use, the user steps on the pedal 3 with both feet, and then the back and buttocks tilt backward and the buttocks sit down. The user's body moves backward as a whole. During this process, the user can overcome the elastic force of the elastic member 9 by using the gravity of his own body, so that the seat plate 4, the backrest 5 and the armrest 6 gradually open. During this process, the seat plate 4 pushes the support rod 7 to rotate around the hinge point, and the pulling member 8 pulls the pedal 3, causing the pedal 3 to tilt up, so that the user's sitting down and the opening of the electric wheelchair reach a force balance, and the user is supported by the seat plate 4 and the backrest 5 to assist the user to sit down slowly. When the user gets up, the user's feet exert force downward and the body tilts forward and the buttocks lift up to get up. During this process, the elastic member 9 pushes the seat plate 4 to stand up, and the pedal 3 pulls the seat plate 4 to stand up through the pulling member 8. The standing up of the seat plate 4 can abut against and push the user's back and buttocks to assist the user to get up.

[0042] Embodiment 2

[0043] The structure and principle of this embodiment are basically the same as those of Embodiment 1. The difference is that in this embodiment, the pulling member 8 is a pull rope and a pulley. The pulley is hinged at the front end between the two support plates 21. One end of the pull rope is fixedly connected to the pedal 3, and the other end is fixedly connected to the middle or top of the support rod 7. The middle of the pull rope abuts against the pulley.

[0044] Embodiment 3

[0045] The structure and principle of this embodiment are basically the same as those of Embodiment 1. The difference is that in this embodiment, the elastic member 9 is an elastic shrapnel, and the number of shrapnels is two. There are two protruding abutting rods 22 on the base 2. One end of the shrapnel acts on the seat plate 4, and the other end acts on the abutting rod 22.

[0046] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Those skilled in the art to which the present invention pertains can make various modifications or supplements to the described specific embodiments or use similar ways to replace them, but will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

[0047] Although terms such as universal wheel 1, base 2, support plate 21, abutting rod 22, pedal 3, connecting rod 31, plate body 32, seat plate 4, cross bar 41, back plate 5, armrest 6, support rod 61, crutch 62, first clamping joint 63, first clamping groove 631, first clamping piece 632, second clamping joint 64, second clamping groove 641, second clamping piece 642, avoidance space 643, first permanent magnet 65, second permanent magnet 66, support rod 7, roller 71, pulling member 8, chain 81, sprocket 82, elastic member 9, battery compartment 10, solar panel 11, lumbar support 12, neck support 13, etc. are used more frequently in this text, it does not exclude the possibility of using other terms. These terms are used only to more conveniently describe and explain the essence of the present invention; interpreting them as any additional limitation is contrary to the spirit of the present invention.

Claims

1. A multi-functional electric wheelchair, comprising a base (2) with universal wheels (1), a pedal (3), a seat board (4), a back board (5) and two armrests (6) arranged at intervals, characterized in that, It further includes at least one support rod (7), a pulling member (8) and an elastic member (9). The rear end of the pedal (3) is hinged to the base (2), and the front end extends outside the base (2). The two ends of the seat plate (4) are respectively hinged to the base (2) and the bottom end of the backrest (5). The two ends of the two armrests (6) are respectively hinged to the base (2) and the bottom end of the backrest (5). The hinge points at the two ends of the two armrests (6) are respectively located above the hinge points at the two ends of the seat plate (4). The bottom end of the support rod (7) is hinged to the base (2). The two ends of the pulling member (8) are respectively connected to the pedal (3) and the support rod (7). The pedal (3) can make the top end of the support rod (7) abut against the bottom surface of the seat plate (4) through the pulling member (8). The elastic member (9) is arranged between the base (2) and the seat plate (4). The two ends of the elastic member (9) respectively act on the base (2) and the seat plate (4). The elastic member (9) can make the seat plate (4) always have a tendency to stand up.

2. The multifunctional electric wheelchair according to claim 1, characterized in that, The pedal (3) includes a connecting rod (31) and a plate body (32) in the shape of a flat plate. The front end of the connecting rod (31) is fixedly connected to the plate body (32) so that the pedal (3) is in a T shape. The rear end of the connecting rod (31) is hinged to the base (2). When the seat plate (4) stands up in the vertical direction, the plate body (32) abuts against the ground. When the seat plate (4) is laid flat in the horizontal direction, the plate body (32) leaves the ground and the front end is tilted up.

3. A multifunctional electric wheelchair according to claim 1, characterized in that, The base (2) includes two support plates (21) that are spaced apart and inclined obliquely downward in the front-rear direction of the electric wheelchair. The bottom end of the support rod (7) is embedded in the middle between the two support plates (21). The bottom end of the support rod (7) is hinged to the two support plates (21). A roller (71) is hinged to the top end of the support rod (7). The roller (71) can abut against the bottom surface of the seat plate (4).

4. A multifunctional electric wheelchair according to claim 3, characterized in that, The pulling member (8) is a chain (81) and a sprocket (82). The sprocket (82) is hinged at the front end between the two support plates (21). One end of the chain (81) is fixedly connected to the pedal (3), and the other end is fixedly connected to the middle or the top end of the support rod (7). The middle of the chain (81) meshes with the sprocket (82).

5. A multifunctional electric wheelchair according to claim 1 or 2 or 3 or 4, characterized in that, The seat plate (4) includes a cross bar (41) at the front end. The elastic member (9) is a torsion spring. The number of the torsion springs is two. The two torsion springs are respectively sleeved on the two ends of the cross bar (41). There are two protruding abutting rods (22) on the base (2). One end of the torsion spring acts on the seat plate (4), and the other end acts on the abutting rod (22).

6. A multifunctional electric wheelchair according to claim 1 or 2 or 3 or 4, characterized in that, The armrest (6) is in the shape of a flat runway. The armrest (6) includes a J-shaped support rod (61) and a J-shaped crutch (62). The support rod (61) is fixedly connected to both the seat plate (4) and the backrest (5). The support rod (61) is located above the crutch (62). The arc segment of the support rod (61) is located at the rear end of the armrest (6). The arc segment of the crutch (62) is located at the front end of the armrest (6). The crutch (62) is detachably fixedly connected to the support rod (61).

7. A multifunctional electric wheelchair according to claim 6, wherein, The end of the arc segment of the support rod (61) has a first clamping joint (63). The end of the straight segment of the crutch (62) has a second clamping joint (64). After the first clamping joint (63) and the second clamping joint (64) are inserted into each other and rotated relatively, the support rod (61) and the crutch (62) can be axially positioned. A first permanent magnet (65) is fixedly connected to the end of the straight segment of the support rod (61). A second permanent magnet (66) is fixedly connected to the end of the arc segment of the crutch (62). After the first permanent magnet (65) and the second permanent magnet (66) attract each other with opposite polarities, the support rod (61) and the crutch (62) can be circumferentially positioned.

8. The multifunctional electric wheelchair according to claim 7, characterized in that, The first clamping joint (63) includes a first clamping groove (631) which is recessed in the end face of the arc segment of the support rod (61) and is annular, and several first clamping pieces (632) spaced apart in the first clamping groove (631). There are gaps between the first clamping pieces (632) and the bottom and the wall of the first clamping groove (631). The second clamping joint (64) includes a second clamping groove (641) which is recessed in the end face of the straight segment of the crutch (62) and is circular, and several second clamping pieces (642) arranged equidistantly on the wall of the second clamping groove (641). There is a gap between the second clamping pieces (642) and the bottom of the second clamping groove (641). There is a clearance space (643) between the inner ends of all the second clamping pieces (642). The first clamping piece (632) can be embedded between two adjacent second clamping pieces (642). The second clamping piece (642) can be embedded between two adjacent first clamping pieces (632).

9. A multifunctional electric wheelchair according to claim 1 or 2 or 3 or 4, characterized in that, The electric wheelchair further includes a battery compartment (10) located at the rear end of the base (2) for installing a storage battery. When the seat plate (4) is laid flat in the horizontal direction, the seat plate (4) abuts against the battery compartment (10).

10. A multifunctional electric wheelchair according to claim 9, characterized in that, The electric wheelchair further includes a solar panel (11) electrically connected to the storage battery in the battery compartment (10). The solar panel (11) is hinged to the top of the backrest (5). When the seat plate (4) is laid flat in the horizontal direction, the solar panel (11) is located directly above the seat plate (4) and there is a certain angle between the solar panel (11) and the backrest (5). When the seat plate (4) is erected in the vertical direction, the solar panel (11) can be attached to the back of the backrest (5).

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