Electric wheelchair and wheelchair armrest mechanism

Abstract

The utility model relates to an electric wheelchair and a wheelchair armrest mechanism. According to the wheelchair, the front wheel support and the rear wheel support are arranged in the crossed mode and rotationally connected, the seat can ascend or descend by controlling stretching or shortening of the driving piece, and therefore the height of the wheelchair can be adjusted according to the requirements of different crowds, and when the seat is located at the highest position, the wheelchair is folded; due to the fact that the front wheel assembly and the rear wheel assembly are not separated from the ground, the wheelchair can stand without additionally arranging anti-tilting wheels and the like, the wheelchair does not need to be erected manually, and folding and moving are very convenient. Meanwhile, the wheelchair armrest mechanism is simple in structure and convenient to adjust, and the unlocking piece can be controlled according to requirements to lock or unlock the locking piece, so that the position of the armrest is locked or unlocked, and the position of the armrest is adjusted according to requirements.

Description

Technical Field

[0001] The utility model relates to the technical field of travel tools, in particular to an electric wheelchair and a wheelchair armrest mechanism. Background Art

[0002] As a device that assists people with mobility impairments and disabled people to move around, electric wheelchairs are an essential means of transportation for disabled people. They have a wide range of applications and can be used in hospitals and homes.

[0003] The current electric wheelchairs are generally complex in structure, and the steps to adjust the height of the electric wheelchair seat are cumbersome. When not in use, they take up a lot of space and are inconvenient to store. Although some electric wheelchairs can be folded, most folding electric wheelchairs require many and cumbersome folding steps, and after folding, the whole body lies flat on the ground and needs to be lifted up by manpower, which is labor-intensive and very inconvenient for a disabled person or an elderly person. Utility Model Content

[0004] The utility model aims to provide an electric wheelchair and a wheelchair armrest mechanism which are height-adjustable and foldable.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0006] An electric wheelchair comprises a controller, a front wheel assembly, a rear wheel assembly, a support mechanism, a seat and an armrest mechanism, wherein the armrest mechanism comprises two groups arranged on the left and right sides of the seat, the armrest mechanism is connected to the seat, and the support mechanism comprises a front wheel bracket, a rear wheel bracket, a connecting rod and a driving member.

[0007] The front wheel bracket and the rear wheel bracket respectively have two groups arranged on the left and right sides of the seat, the front wheel bracket and the rear wheel bracket on the same side are arranged crosswise and are rotatably connected, the lower parts of the front wheel bracket and the rear wheel bracket are respectively connected to the front wheel assembly and the rear wheel assembly, the upper part of either the front wheel bracket or the rear wheel bracket is rotatably connected to the seat, and the upper part of the other is rotatably and slidably connected to the seat;

[0008] The connecting rod is connected between the front wheel brackets or the rear wheel brackets on both sides;

[0009] The two ends of the driving member are rotatably connected to the seat and the connecting rod respectively. The driving member is controlled by the controller and can be operatively extended or shortened along its length direction to adjust the seat to different heights.

[0010] The electric wheelchair has an unfolded state and a folded state. When in the unfolded state, the driving member is operated to extend, the front wheel bracket and the rear wheel bracket rotate and drive the front wheel assembly and the rear wheel assembly to move closer to each other, and the seat rises; the driving member is operated to shorten, the front wheel bracket and the rear wheel bracket rotate and drive the front wheel assembly and the rear wheel assembly to move away from each other, and the seat falls; when in the folded state, the seat is located in the highest position, the front wheel assembly and the rear wheel assembly are not separated from the ground, and the armrest mechanism moves to the outside of the front wheel bracket.

[0011] Preferably, the driving member extends obliquely backward along the up-down direction, and one end of the driving member is connected to the rear side of the seat.

[0012] Preferably, the connecting rod is located below the rotation center line of the front wheel bracket and the rear wheel bracket.

[0013] Further preferably, the end portion of the driving member connected to the connecting rod is connected to the middle portion of the connecting rod through a sleeve.

[0014] Preferably, the front wheel bracket, the rear wheel bracket and the driving member are located in the same horizontal plane as the rotation center line of the seat.

[0015] Preferably, the front wheel assembly includes a left front wheel and a right front wheel respectively arranged on the left and right sides, and a pedal rotatably connected between the left front wheel and the right front wheel. When the electric wheelchair is in a folded state, the pedal rotates and moves toward the direction of the front wheel bracket.

[0016] Preferably, the rear wheel assembly includes a left rear wheel and a right rear wheel respectively arranged on the left and right sides, and a controller module connected between the left rear wheel and the right rear wheel.

[0017] In some embodiments, the left front wheel and the right front wheel are respectively located outside the left rear wheel and the right rear wheel, and when the electric wheelchair is in a folded state, the left front wheel and the left rear wheel as well as the right front wheel and the right rear wheel are staggered.

[0018] Preferably, the armrest mechanism comprises a mounting seat fixedly connected to the seat, an armrest rotatably connected to the mounting seat, a locking member for locking the armrest to the mounting seat, and an unlocking member for unlocking the locking member.

[0019] The armrest comprises an armrest body and a rotating member connected to the armrest body, the rotating member is rotatably connected to the mounting seat, a locking groove is provided on the rotating member, and the locking groove has a locking area and a sliding area;

[0020] The locking member is slidably disposed on the mounting seat, and the locking member has a locking portion protruding outward, the locking portion is inserted into the locking groove and can be switched between the locking area and the sliding area, when the locking member is in the locking area, the locking member is in a locked state; when the locking member is in the sliding area, the locking member is in an unlocked state;

[0021] The unlocking member is connected to the locking member and is at least partially exposed. When a certain force is applied to the unlocking member, the unlocking member can drive the locking member to switch between the locking area and the sliding area.

[0022] In some embodiments, the sliding area is arc-shaped and the center line is the rotation center line of the armrest, and the locking area is located at one end of the sliding area and the extension direction is consistent with the sliding direction of the locking member.

[0023] In some embodiments, the mounting seat has a chamber for accommodating the locking member and a first slide groove extending in the left-right direction and adapted to the locking portion, and the locking portion passes through the first slide groove and can slide along the extension direction of the first slide groove.

[0024] In some embodiments, the armrest mechanism further comprises an elastic member, wherein the elastic member is disposed between the locking member and the mounting seat and causes the locking member to have a tendency to move toward the locking area.

[0025] Preferably, the seat includes a fixed seat, a seat cushion arranged on the fixed seat and a backrest rotatably connected to the fixed seat, the lower part of the fixed seat is provided with a second slide groove extending in the front and rear direction, the upper part of the front wheel bracket or the rear wheel bracket is rotatably and slidably arranged in the second slide groove, and when the seat is in a folded state, the backrest moves toward the direction of the seat cushion.

[0026] The utility model also provides an armrest mechanism of the wheelchair as described above.

[0027] Due to the application of the above technical solution, the utility model has the following advantages compared with the prior art:

[0028] The utility model arranges the front wheel bracket and the rear wheel bracket crosswise and rotatably connects them, and the seat can be raised or lowered by controlling the extension or shortening of the driving member, so that the height of the wheelchair can be adjusted according to the needs of different groups of people. When the seat rises to the highest position, the wheelchair can be folded by adjusting the wheelchair. Since the front wheel assembly and the rear wheel assembly are not separated from the ground, there is no need to additionally set up anti-tilt wheels, etc., and the wheelchair can be made to stand up, and there is no need to manually stand it up, so it is very convenient to fold and move.

[0029] The wheelchair armrest mechanism of the utility model has a simple structure and is easy to adjust. The unlocking member can be controlled to lock or unlock the locking member according to needs, thereby locking or unlocking the position of the armrest to adjust the position of the armrest according to needs. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is a schematic diagram of the structure of the electric wheelchair in Example 1;

[0031] Figure 2 This is a schematic structural diagram of the electric wheelchair of Example 1 from another angle;

[0032] Figure 3 is a top view of the electric wheelchair of Example 1;

[0033] Figure 4 for Figure 3 Sectional view of the AA plane;

[0034] Figure 5 This is a front view of the electric wheelchair of Example 1;

[0035] Figure 6 is a side view of the electric wheelchair of Example 1;

[0036] Figure 7 It is a rear view of the electric wheelchair of Example 1;

[0037] Figure 8 This is a schematic diagram of the structure of the electric wheelchair in Example 1 located at a high position;

[0038] Fig. 9 This is a schematic diagram of the structure of the electric wheelchair in Example 1 when it is in a folded state;

[0039] Fig.10 is a schematic structural diagram of another angle when the electric wheelchair of Example 1 is in a folded state;

[0040] Fig.11 This is a structural schematic diagram of the armrest mechanism of Example 1;

[0041] Fig.12 This is an exploded schematic diagram of the armrest mechanism of Example 1;

[0042] Fig.13 is a cross-sectional view of the armrest mechanism of Example 1;

[0043] Fig.14 This is a front view of the armrest mechanism of Example 1;

[0044] Fig.15 It is a rear view of the armrest mechanism of Example 1;

[0045] Among them, 1. front wheel assembly; 11. left front wheel; 12. right front wheel; 13. pedal;

[0046] 2. Rear wheel assembly; 21. Left rear wheel; 22. Right rear wheel; 23. Controller module;

[0047] 3. Support mechanism; 31. Front wheel bracket; 32. Rear wheel bracket; 33. Connecting rod; 34. Driving member; 35. Casing;

[0048] 4. seat; 41. fixed seat; 411. second slide; 42. seat cushion; 43. backrest;

[0049] 5. Armrest mechanism; 51. Armrest body; 52. Rotating member; 521. Locking area; 522. Sliding area; 53. Mounting seat; 531. Mounting seat cavity; 532. First slide groove; 54. Locking member; 541. Locking part; 55. Unlocking member; 56. Elastic member; 57. Armrest frame cover; 58. Operation module;

[0050] 6. Battery module. DETAILED DESCRIPTION

[0051] The utility model is further described below in conjunction with the embodiments shown in the accompanying drawings.

[0052] In the following, only some exemplary embodiments are briefly described. As those skilled in the art will appreciate, the described embodiments may be modified in various ways without departing from the spirit or scope of the embodiments of the present invention. Therefore, the drawings and descriptions are considered to be exemplary and non-restrictive in nature.

[0053] In the description of the embodiments of the present utility model, it should be understood that the descriptions of up and down, left and right, front and back, inside and outside, etc. in this document are all defined based on the up and down, left and right, front and back, inside and outside, etc. observed by the person riding in the wheelchair.

[0054] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present utility model, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0055] In the embodiments of the present utility model, unless otherwise clearly specified and limited, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through another feature between them. Moreover, the first feature being "above", "above" and "above" the second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature includes the first feature being directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0056] The disclosure below provides many different embodiments or examples for realizing different structures of the embodiments of the present utility model. In order to simplify the disclosure of the embodiments of the present utility model, the components and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the embodiments of the present utility model. In addition, the embodiments of the present utility model can repeat reference numbers and / or reference letters in different examples, and this repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed.

[0057] Example 1

[0058] like Figures 1 to 10 As shown, an electric wheelchair includes a controller, a front wheel assembly 1, a rear wheel assembly 2, a support mechanism 3, a seat 4 and an armrest mechanism 5. The electric wheelchair has a height-adjustable unfolded state ( Figures 1 to 8 ) and the folded state ( Fig. 9 and Fig.10 ).

[0059] The supporting mechanism 3 includes a front wheel bracket 31 , a rear wheel bracket 32 ​​, a connecting rod 33 and a driving member 34 .

[0060] The front wheel bracket 31 and the rear wheel bracket 32 ​​respectively have two groups arranged on the left and right sides of the seat 4. The front wheel bracket 31 and the rear wheel bracket 32 ​​on the same side are crossed and arranged in an "X" shape, and the two are connected to rotate around the left and right directions. The lower parts of the front wheel bracket 31 and the rear wheel bracket 32 ​​are connected to the front wheel assembly 1 and the rear wheel assembly 2 respectively. The upper part of either the front wheel bracket 31 or the rear wheel bracket 32 ​​is connected to the seat 4 in a rotational manner, and the upper part of the other is connected to the seat 4 in a rotational and sliding manner. The rotation center line of the front wheel bracket 31 and the rear wheel bracket 32 ​​and the seat 3 extends in the left and right direction, and the sliding direction of the front wheel bracket 31 or the rear wheel bracket 32 ​​and the seat 4 is the front-to-back direction. In this embodiment, the rear wheel assembly 2 is connected to the seat 4 in a rotational and sliding manner.

[0061] The connecting rod 33 is connected between the front wheel brackets 31 or the rear wheel brackets 32 on both sides, and is preferably located below the rotation centerline of the front wheel brackets 31 and the rear wheel brackets 32. In this embodiment, the connecting rod 33 is connected to the rear wheel bracket 32.

[0062] The two ends of the driving member 34 are rotatably connected to the seat 4 and the connecting rod 33, respectively. Specifically, the driving member 34 extends obliquely backward in the up-down direction, the upper end of which is connected to the rear side of the seat 4 rotatably around the left-right direction, and the lower end is connected to the middle area of ​​the connecting rod 33 rotatably around the left-right direction, and is preferably connected to the connecting rod 33 through a sleeve 35. Preferably, the driving member 34, the front wheel bracket 31 and the rear wheel bracket 32 ​​are located in the same horizontal plane as the rotation center line of the seat 4, so that the seat 4 has a relatively horizontal bearing surface, and the user sits more comfortably. The driving member 34 is controlled by a controller and can be extended or shortened along its length direction to adjust the seat 4 to different heights. Preferably, the driving member 34 is an electric push rod.

[0063] When the wheelchair is in the unfolded state, the driving member 34 is extended, and the driving member 34 drives the connecting rod 33 to drive the front wheel bracket 31 and the rear wheel bracket 32 ​​to rotate and make the front wheel assembly 1 and the rear wheel assembly 2 move closer to each other, thereby raising the seat 4; the driving member 34 is shortened, and the driving member 34 drives the connecting rod 33 to drive the front wheel bracket 31 and the rear wheel bracket 32 ​​to rotate and make the front wheel assembly 1 and the rear wheel assembly 2 move away from each other, thereby lowering the seat 4. In this way, the height of the seat 4 can be adjusted.

[0064] When the seat 4 rises to the highest position, the front wheel assembly 1 and the rear wheel assembly 2 are not separated from the ground, and the armrest mechanism 5 is operated to move to the outside of the front wheel bracket 31, and the seat 4 is operated to be folded, so that the wheelchair can be switched to the folded state. Since the front wheel assembly 1 and the rear wheel assembly 2 are not separated from the ground, the wheelchair does not need to be additionally provided with anti-tilt wheels, etc., and the wheelchair can stand stably without manual support, and it is very convenient to fold and move.

[0065] The front wheel assembly 1 comprises a left front wheel 11 and a right front wheel 12 respectively arranged on the left and right sides, and a pedal 13 rotatably connected between the left front wheel 11 and the right front wheel 12. The left and right front wheels (11, 12) are respectively arranged at the bottom of the front wheel brackets 31 on the left and right sides, and when the electric wheelchair is in a folded state, the pedal 13 rotates and moves toward the direction of the front wheel brackets 31. The rear wheel assembly 2 comprises a left rear wheel 21 and a right rear wheel 22 respectively arranged on the left and right sides, and a controller module 23 connected between the left rear wheel 21 and the right rear wheel 22. The left and right rear wheels (21, 22) are respectively arranged at the bottom of the rear wheel brackets 32 on the left and right sides, and the left front wheel 11 and the right front wheel 12 are respectively located on the outer sides of the left rear wheel 21 and the right rear wheel 22. When the electric wheelchair is in a folded state, the left front wheel 11 and the left rear wheel 21, and the right front wheel 12 and the right rear wheel 22 are staggered, so that the seat 4 can stand while the seat 4 is folded to have a smaller volume. The controller module 23 is electrically connected to the driving member 34 and can be used to control the extension and retraction of the driving member 34 .

[0066] The seat 4 includes a fixed seat 41, a seat cushion 42 disposed on the fixed seat 41, and a backrest 43 rotatably connected to the fixed seat 41. When the seat 4 is in a folded state, the backrest 43 moves toward the seat cushion 42. A second slide groove 411 extending in the front-to-back direction is provided at the lower portion of the fixed seat 41, and the upper portion of the front wheel bracket 31 or the rear wheel bracket 32 ​​is rotatably and slidably disposed in the second slide groove 411. In this embodiment, the upper portion of the rear wheel bracket 32 ​​is rotatably and slidably disposed in the second slide groove 411.

[0067] The armrest mechanism 5 has two groups arranged on the left and right sides of the seat 4, one of which is provided with an operating module 58, which is connected to the controller module 23 and is used to control the lifting and lowering of the electric wheelchair. The specific structure and design of the operating module 58 can refer to the prior art, and this application will not focus on the description. The following focuses on one group of the armrest mechanism 5 as an example.

[0068] like Figures 11 to 15As shown, the armrest mechanism 5 includes a mounting seat 53 fixedly connected to the fixed seat 41 of the seat 4, an armrest rotatably connected to the mounting seat 53, a locking member 54 for locking the armrest with the mounting seat 53, and an unlocking member 55 for unlocking the locking member 54. The armrest includes an armrest body 51 and a rotating member 52 connected to the armrest body 51, the rotating member 52 is rotatably sleeved on the mounting seat 53, and a locking groove is provided on the rotating member 52, and the locking groove has a locking area 521 and a sliding area 522. The locking member 54 is slidably arranged on the mounting seat 53, and the locking member 54 has a locking portion 541 protruding outward and adapted to the locking groove, the locking portion 541 is inserted in the locking groove and can switch between the locking area 521 and the sliding area 522, when the locking member 54 is in the locking area 521, the locking member 54 is in a locked state; when the locking member 54 is in the sliding area 522, the locking member 54 is in an unlocked state. The unlocking member 55 is connected to the locking member 54 and is at least partially exposed. When a certain force is applied to the unlocking member 55, the unlocking member 55 can drive the locking member 54 to switch between the locking area 521 and the sliding area 522. The mounting seat 53 has a mounting seat cavity 531 for accommodating the locking member 54 and a first slide groove 532 extending in the left-right direction and adapted to the locking portion 541. The locking portion 541 passes through the first slide groove 532 and can slide along the extension direction of the first slide groove 532.

[0069] Furthermore, the sliding area 522 is in an arc shape and its center line is the rotation center line of the armrest, and the locking area 521 is located at one end of the sliding area 522 and its extension direction is consistent with the sliding direction of the locking member 54. When the locking portion 541 is located in the locking area 521, the rotating member 52 cannot rotate along the rotation direction due to the blocking of the locking portion 541; and when the locking portion 541 is located in the sliding area 522, the rotating member 52 can rotate along the rotation direction due to the setting of the sliding area 522.

[0070] The armrest mechanism 5 further comprises an elastic member 56, which is disposed between the locking member 54 and the mounting seat 53 and makes the locking member 54 have a tendency to move toward the locking area 521. The elastic member 56 is preferably a spring.

[0071] The armrest mechanism 5 further includes an armrest frame cover 57 , which is disposed between the unlocking member 55 and the rotating member 52 .

[0072] The electric wheelchair further comprises a battery module 6 disposed between the front wheel assemblies 1 on the left and right sides for supplying power to the battery.

[0073] The above embodiments are only for illustrating the technical concept and features of the utility model, and their purpose is to enable people familiar with the technology to understand the content of the utility model and implement it accordingly, and they cannot be used to limit the protection scope of the utility model. Any equivalent changes or modifications made according to the spirit of the utility model should be included in the protection scope of the utility model.

Claims

1. An electric wheelchair, comprising a controller, a front wheel assembly, a rear wheel assembly, a support mechanism, a seat and an armrest mechanism, wherein the armrest mechanism has two groups arranged on the left and right sides of the seat, and the armrest mechanism is connected to the seat, characterized in that: The support mechanism includes a front wheel bracket, a rear wheel bracket, a connecting rod and a driving member. The front wheel bracket and the rear wheel bracket respectively have two groups arranged on the left and right sides of the seat, the front wheel bracket and the rear wheel bracket on the same side are arranged crosswise and are rotatably connected, the lower parts of the front wheel bracket and the rear wheel bracket are respectively connected to the front wheel assembly and the rear wheel assembly, the upper part of either the front wheel bracket or the rear wheel bracket is rotatably connected to the seat, and the upper part of the other is rotatably and slidably connected to the seat; The connecting rod is connected between the front wheel brackets or the rear wheel brackets on both sides; The two ends of the driving member are rotatably connected to the seat and the connecting rod respectively. The driving member is controlled by the controller and can be operatively extended or shortened along its length direction to adjust the seat to different heights. The electric wheelchair has an unfolded state and a folded state. When in the unfolded state, the driving member is operated to extend, the front wheel bracket and the rear wheel bracket rotate and drive the front wheel assembly and the rear wheel assembly to move closer to each other, and the seat rises; the driving member is operated to shorten, the front wheel bracket and the rear wheel bracket rotate and drive the front wheel assembly and the rear wheel assembly to move away from each other, and the seat falls; When in the folded state, the seat is located at the highest position, the front wheel assembly and the rear wheel assembly are not separated from the ground, and the armrest mechanism moves to the outside of the front wheel bracket.

2. The electric wheelchair according to claim 1, characterized in that: The driving member extends obliquely backward along the up-down direction, and one end of the driving member is connected to the rear side of the seat.

3. The electric wheelchair according to claim 1, characterized in that: The connecting rod is located below the rotation center lines of the front wheel bracket and the rear wheel bracket.

4. The electric wheelchair according to claim 3, characterized in that: The end portion of the driving member connected to the connecting rod is connected to the middle portion of the connecting rod through a sleeve.

5. The electric wheelchair according to claim 1, characterized in that: The front wheel bracket, the rear wheel bracket and the driving member are located in the same horizontal plane as the rotation center line of the seat.

6. The electric wheelchair according to claim 1, characterized in that: The front wheel assembly comprises a left front wheel and a right front wheel respectively arranged on the left and right sides, and a pedal rotatably connected between the left front wheel and the right front wheel, and when the electric wheelchair is in a folded state, the pedal rotates and moves toward the direction of the front wheel bracket; and / or, The rear wheel assembly comprises a left rear wheel and a right rear wheel which are arranged on the left and right sides respectively, and a controller module connected between the left rear wheel and the right rear wheel.

7. The electric wheelchair according to claim 6, characterized in that: The left front wheel and the right front wheel are respectively located outside the left rear wheel and the right rear wheel. When the electric wheelchair is in a folded state, the left front wheel and the left rear wheel, as well as the right front wheel and the right rear wheel are staggered.

8. The electric wheelchair according to claim 1, characterized in that: The armrest mechanism comprises a mounting seat fixedly connected to the seat, an armrest rotatably connected to the mounting seat, a locking member for locking the armrest with the mounting seat, and an unlocking member for unlocking the locking member. The armrest comprises an armrest body and a rotating member connected to the armrest body, the rotating member is rotatably connected to the mounting seat, a locking groove is provided on the rotating member, and the locking groove has a locking area and a sliding area; The locking member is slidably disposed on the mounting seat, and the locking member has a locking portion protruding outward, the locking portion is inserted into the locking groove and can be switched between the locking area and the sliding area, and when the locking member is in the locking area, the locking member is in a locked state; When the locking member is in the sliding area, the locking member is in an unlocked state; The unlocking member is connected to the locking member and is at least partially exposed. When a certain force is applied to the unlocking member, the unlocking member can drive the locking member to switch between the locking area and the sliding area.

9. The electric wheelchair according to claim 8, characterized in that: The sliding area is in an arc shape and its center line is the rotation center line of the armrest. The locking area is located at one end of the sliding area and its extension direction is consistent with the sliding direction of the locking piece.

10. The electric wheelchair according to claim 8, characterized in that: The mounting seat has a chamber for accommodating the locking member and a first slide groove extending in the left-right direction and adapted to the locking portion. The locking portion passes through the first slide groove and can slide along the extending direction of the first slide groove.

11. The electric wheelchair according to claim 8, characterized in that: The armrest mechanism further comprises an elastic member, which is disposed between the locking member and the mounting seat and causes the locking member to have a tendency to move toward the locking area.

12. The electric wheelchair according to claim 1, characterized in that: The seat includes a fixed seat, a seat cushion arranged on the fixed seat, and a backrest rotatably connected to the fixed seat. The lower part of the fixed seat is provided with a second slide groove extending in the front-to-back direction. The upper part of the front wheel bracket or the rear wheel bracket is rotatably and slidably arranged in the second slide groove. When the seat is in a folded state, the backrest moves toward the seat cushion.

13. A wheelchair armrest mechanism, characterized in that: The armrest mechanism comprises a mounting seat fixedly connected to the seat, an armrest rotatably connected to the mounting seat, a locking member for locking the armrest with the mounting seat, and an unlocking member for unlocking the locking member. The armrest comprises an armrest body and a rotating member connected to the armrest body, the rotating member is rotatably sleeved on the mounting seat, a locking groove is provided on the rotating member, and the locking groove has a locking area and a sliding area; The locking member is slidably disposed on the mounting seat, and the locking member has a locking portion protruding outward, the locking portion is inserted into the locking groove and can be switched between the locking area and the sliding area, and when the locking member is in the locking area, the locking member is in a locked state; When the locking member is in the sliding area, the locking member is in an unlocked state; The unlocking member is connected to the locking member and is at least partially exposed. When a certain force is applied to the unlocking member, the unlocking member can drive the locking member to switch between the locking area and the sliding area.

14. The wheelchair armrest mechanism according to claim 13, characterized in that: The sliding area is in an arc shape and its center line is the rotation center line of the armrest. The locking area is located at one end of the sliding area and its extension direction is consistent with the sliding direction of the locking piece.

15. The wheelchair armrest mechanism according to claim 13, characterized in that: The mounting seat has a chamber for accommodating the locking member and a first slide groove extending in the left-right direction and adapted to the locking portion. The locking portion passes through the first slide groove and can slide along the extending direction of the first slide groove.

16. The wheelchair armrest mechanism according to claim 13, characterized in that: The armrest mechanism further comprises an elastic member, which is disposed between the locking member and the mounting seat and causes the locking member to have a tendency to move toward the locking area.

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