阅读说明：本技术 一种可折叠电动轮椅 (Foldable electric wheelchair ) 是由 吴焘 陈向阳 于 2021-01-22 设计创作，主要内容包括：本发明提供的可折叠电动轮椅,其轮椅架包括前部沿水平方向延伸后部向下后方倾斜延伸的后轮支架、上端部与后轮支架前端部相转动连接的前轮支架、下端部与后轮支架后部相转动连接的支撑杆、连接杆、下端部与支撑杆上端部相转动连接的靠背支架、扶手支架,通过使连接杆的前后端部分别与前轮、后轮支架相转动连接,使扶手支架的两端部分别与后轮、靠背支架相转动连接,使得前轮支架、连接杆、支撑杆和后轮支架构成第一四连杆机构,使得后轮支架、支撑杆、靠背支架和扶手支架构成第二四连杆机构,这两个四连杆机构共用后轮支架和支撑杆,只需控制其中一个即可实现轮椅架的锁定和解锁,构思巧妙、结构简单、操作方便；采用电力驱动,使用方便。(The invention provides a foldable electric wheelchair, the wheelchair frame comprises a rear wheel bracket, a front wheel bracket, a support rod, a connecting rod, a backrest bracket and a handrail bracket, wherein the front part of the rear wheel bracket extends along the horizontal direction, the rear part of the rear wheel bracket extends downwards and obliquely, the upper end part of the rear wheel bracket is connected with the front end part of the rear wheel bracket in a rotating way, the lower end part of the support rod is connected with the rear part of the rear wheel bracket in a rotating way, the lower end part of the support rod is connected with the upper end part of the support rod in a rotating way, the front wheel bracket, the connecting rod, the support rod and the rear wheel bracket form a first four-bar linkage mechanism, the rear wheel bracket, the support rod, the backrest bracket and the handrail bracket form a second four-bar linkage mechanism, the two four-bar linkage mechanisms share the rear, the design is ingenious, the structure is simple, and the operation is convenient; the electric drive is adopted, and the use is convenient.)

1. A foldable electric wheelchair including a wheelchair frame having unfolded and folded states, a wheel assembly located at the bottom of the wheelchair frame, an electric drive assembly for driving the wheel assembly to rotate, a wheelchair frame locking mechanism for locking the wheelchair frame in the unfolded state, characterized in that the wheelchair frame includes:

the front part of the rear wheel bracket extends along the horizontal direction and is used for supporting a seat, and the rear part of the rear wheel bracket extends downwards and backwards in an inclined way;

the front wheel bracket is positioned at the front lower part of the seat, and the upper end part of the front wheel bracket is rotationally connected with the front end part of the rear wheel bracket;

the support rod is positioned at the rear lower part of the seat, and the lower end part of the support rod is rotatably connected with the rear part of the rear wheel bracket;

the connecting rod extends obliquely from front to bottom and back to top, the front end of the connecting rod is rotatably connected with the lower end of the front wheel bracket, and the back end of the connecting rod is rotatably connected with the upper end of the supporting rod, so that the front wheel bracket, the connecting rod, the supporting rod and the back wheel bracket form a first four-bar linkage;

the lower end part of the backrest bracket is rotatably connected with the upper end part of the supporting rod;

the armrest support is positioned on two sides of the seat, the front part of the armrest support extends obliquely towards the front lower part, the rear part of the armrest support extends along the horizontal direction, the front end part of the armrest support is rotatably connected with the front end part of the rear wheel support, and the rear end part of the armrest support is rotatably connected with the middle part of the backrest support, so that the rear wheel support, the support rod, the backrest support and the armrest support form a second four-bar linkage mechanism.

2. The foldable electric wheelchair as recited in claim 1, wherein: the front end part of the armrest support, the upper end part of the front wheel support and the front end part of the rear wheel support share a first rotating shaft, and the lower end part of the backrest support, the upper end part of the support rod and the rear end part of the connecting rod share a second rotating shaft.

3. The foldable electric wheelchair as recited in claim 2, wherein: the wheelchair frame locking mechanism enables the wheelchair frame to be locked in the unfolded state by locking the relative positions of the connecting rod and the supporting rod, and comprises an unlocking handle which is rotatably connected to the upper end part of the supporting rod through the second rotating shaft.

4. The foldable electric wheelchair as recited in claim 1, wherein: the handrail support is provided with a height-adjustable handrail, the handrail comprises a handrail plate and a supporting plate, the handrail plate is parallel to the rear portion of the handrail support, the upper end portion of the supporting plate is connected to the bottom of the handrail plate, the supporting plate can be slidably arranged in a mounting hole in the front portion of the handrail support in a penetrating mode along the extending direction of the supporting plate, and the extending direction of the supporting plate coincides with the extending direction of the front portion of the handrail support.

5. The foldable electric wheelchair as recited in claim 4, wherein: the armrest support is further provided with an armrest locking mechanism for locking the relative position of the support plate and the armrest support, the armrest locking mechanism comprises locking holes, a locking block, a handle and a spring, the locking holes are formed in the inner wall of the mounting hole and extend in the radial direction of the mounting hole, at least two locking holes are formed in the armrest support, the two locking holes are arranged in the axial direction of the mounting hole at intervals, the locking block is rotatably arranged on the support plate through a third rotating shaft and is provided with a first working position and a second working position, when the locking block is located at the first working position, the locking block is inserted into the locking holes to lock the armrest locking mechanism, and when the locking block is located at the second working position, the locking block is separated from the locking holes to unlock the armrest locking mechanism, the handle is arranged on the supporting plate in a sliding mode, when the handle slides relative to the supporting plate, the locking block can be driven to change between the first working position and the second working position, the spring is located in the mounting hole, and the spring has a tendency of driving the locking block to change to the first working position.

6. The foldable electric wheelchair as recited in claim 5, wherein: the supporting plate is provided with a sliding groove, the bottom of the supporting plate is connected with a hollow connecting block, the handle comprises a handle body, a connecting rod and a sliding block which are sequentially connected from top to bottom,

the handle body is arranged on the supporting plate in a sliding mode, the connecting rod is arranged in the sliding groove in a sliding mode, and the sliding block is arranged in the connecting block in a sliding mode.

7. The foldable electric wheelchair as recited in claim 6, wherein: the sliding block is provided with a limiting groove, the extending direction of the limiting groove is parallel to the sliding direction of the handle, and the third rotating shaft is slidably arranged in the limiting groove in a penetrating mode.

8. The foldable electric wheelchair as recited in claim 6, wherein: the sliding block is provided with a guide groove, an included angle between the extending direction of the guide groove and the sliding direction of the handle is an acute angle, the locking block is provided with a guide shaft, the guide shaft is parallel to the third rotating shaft, the end part of the guide shaft is slidably arranged in the guide groove, and when the handle slides on the supporting plate, the locking block can be driven to rotate through the matching of the guide shaft and the guide groove.

9. The foldable electric wheelchair as recited in claim 6, wherein: the two end parts of the connecting rod are respectively connected to the handle body and the sliding block in a rotating mode.

10. The foldable electric wheelchair as recited in any one of claims 5-9, wherein: the electric drive subassembly includes motor, battery and controller, the motor sets up the lower tip of rear wheel support is used for driving the wheel subassembly rotates, the battery is located under the seat board, be used for to the motor provides electric power, the controller sets up the front end of handrail board, the outer wall of locking block with be provided with the electrode on the inner wall of locking hole, the electrode is established ties on the control circuit of controller when handrail locking mechanical system is in the lock-out state, the electrode switch-on control circuit, the controller can control the motor rotates.

Technical Field

The invention belongs to the field of medical instruments, and particularly relates to a foldable electric wheelchair.

Background

In the process of treating and recovering patients, particularly for patients who cannot walk independently, the wheelchair mode is usually adopted to replace walking, so that the patients can be treated and recovered well, and the daily life of the patients is facilitated.

Most of the existing wheelchairs are not foldable and inconvenient to store, and although some wheelchairs are also partially foldable, most of the wheelchairs are complex in structure, so that the control mode of a locking mechanism is also complex, the wheelchairs are inconvenient to fold and unfold, and most of the existing wheelchairs are manually driven and inconvenient to use.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provides a foldable electric wheelchair which is ingenious in conception, simple in structure, convenient to operate, driven by electric power and convenient to use.

In order to achieve the above object, the present invention adopts a technical solution that a foldable electric wheelchair includes a wheelchair frame having an unfolded state and a folded state, a wheel assembly located at a bottom of the wheelchair frame, an electric drive assembly for driving the wheel assembly to rotate, and a wheelchair frame locking mechanism for locking the wheelchair frame in the unfolded state, the wheelchair frame including:

the front part of the rear wheel bracket extends along the horizontal direction and is used for supporting a seat, and the rear part of the rear wheel bracket extends downwards and backwards in an inclined way;

the front wheel bracket is positioned at the front lower part of the seat, and the upper end part of the front wheel bracket is rotationally connected with the front end part of the rear wheel bracket;

the support rod is positioned at the rear lower part of the seat, and the lower end part of the support rod is rotatably connected with the rear part of the rear wheel bracket;

the connecting rod extends obliquely from front to bottom and back to top, the front end of the connecting rod is rotatably connected with the lower end of the front wheel bracket, and the back end of the connecting rod is rotatably connected with the upper end of the supporting rod, so that the front wheel bracket, the connecting rod, the supporting rod and the back wheel bracket form a first four-bar linkage;

the lower end part of the backrest bracket is rotatably connected with the upper end part of the supporting rod;

the armrest support is positioned on two sides of the seat, the front part of the armrest support extends obliquely towards the front lower part, the rear part of the armrest support extends along the horizontal direction, the front end part of the armrest support is rotatably connected with the front end part of the rear wheel support, and the rear end part of the armrest support is rotatably connected with the middle part of the backrest support, so that the rear wheel support, the support rod, the backrest support and the armrest support form a second four-bar linkage mechanism.

Preferably, the front end portion of the armrest support, the upper end portion of the front wheel support, and the front end portion of the rear wheel support share a first rotation axis, and the lower end portion of the backrest support, the upper end portion of the support bar, and the rear end portion of the connecting bar share a second rotation axis, so that the wheelchair frame is more compact in structure and more high-class.

Further preferably, wheelchair frame locking mechanical system is through the locking the connecting rod with the relative position of bracing piece makes the wheelchair frame locking is in the state of expanding, wheelchair frame locking mechanical system is including the unblock handle, the unblock handle passes through the second axis of rotation is rotationally connected the upper end of bracing piece sets up like this and makes wheelchair frame locking mechanical system's unblock handle be located the intermediate position at this collapsible electronic wheelchair rear portion, and unblock handle adopts the mode of rotatory unblock, and difficult spurious triggering, and the security is better.

Preferably, be provided with height-adjustable's handrail on the handrail support, the handrail includes handrail board and backup pad, handrail board with handrail support's rear portion parallels, the upper end of backup pad is connected handrail board's bottom, the backup pad can be followed self extending direction and worn to establish with sliding and be located in the mounting hole of handrail support's front portion, the extending direction of backup pad with handrail support's the anterior extending direction of portion coincides mutually, sets up the elbow portion of the bearing user that can be better like this to adapt to the user of different heights, thereby promote this collapsible electric wheelchair's commonality and riding comfort.

Further preferably, the armrest support is further provided with an armrest locking mechanism for locking the relative position of the support plate and the armrest support, the armrest locking mechanism includes at least two locking holes, a locking block, a handle and a spring, the locking holes are opened in the inner wall of the mounting hole and extend in the radial direction of the mounting hole, the two locking holes are arranged at intervals in the axial direction of the mounting hole, the locking block is rotatably arranged on the support plate through a third rotating shaft, the locking block has a first working position and a second working position, when the locking block is in the first working position, the locking block is inserted into the locking hole to lock the armrest locking mechanism, when the locking block is in the second working position, the locking block is disengaged from the locking hole to unlock the armrest locking mechanism, the handle can be arranged on the supporting plate in a sliding mode, when the handle slides relative to the supporting plate, the locking block can be driven to change between the first working position and the second working position, the spring is located in the mounting hole, the spring has a tendency of driving the locking block to change to the first working position, operation of a user can be facilitated through the arrangement, and high-grade feeling is strong.

Further preferably, the supporting plate is provided with a sliding groove, the bottom of the supporting plate is connected with a hollow connecting block, the handle comprises a handle body, a connecting rod and a sliding block which are sequentially connected from top to bottom, the handle body is slidably arranged on the supporting plate, the connecting rod is slidably arranged in the sliding groove, and the sliding block is slidably arranged in the connecting block.

Further preferably, a limiting groove is formed in the sliding block, the extending direction of the limiting groove is parallel to the sliding direction of the handle, the third rotating shaft is slidably arranged in the limiting groove in a penetrating manner, a guide groove is formed in the sliding block, an included angle between the extending direction of the guide groove and the sliding direction of the handle is an acute angle, a guide shaft is arranged on the locking block and is parallel to the third rotating shaft, the end portion of the guide shaft is slidably arranged in the guide groove, and when the handle slides on the supporting plate, the locking block can be driven to rotate through the matching of the guide shaft and the guide groove, so that the sliding of the handle is ingeniously changed into the rotation of the locking block, and the rotation angle of the locking block can be indirectly limited.

Further preferably, the two end parts of the connecting rod are respectively and rotatably connected to the handle body and the sliding block, so that the connecting rod can be prevented from being clamped by the groove wall of the sliding groove when the handle slides, and the sliding block can also be prevented from being clamped by the inner wall of the connecting block.

Further preferably, the electric drive assembly comprises a motor, a battery and a controller, the motor is arranged at the lower end part of the rear wheel support and used for driving the wheel assembly to rotate, the battery is arranged under the seat plate and used for providing electric power for the motor, the controller is arranged at the front end part of the handrail plate, electrodes are arranged on the outer wall of the locking block and the inner wall of the locking hole and connected in series on a control circuit of the controller, when the handrail locking mechanism is in a locking state, the electrodes are connected with the control circuit, the controller can control the motor to rotate, the arrangement has the advantages that the gravity center of the foldable electric wheelchair can be reduced, the foldable electric wheelchair is more stable when the foldable electric wheelchair is moved, the electric drive mode can enable a user to operate the wheelchair to move more conveniently, and the potential safety hazard caused by mistakenly touching the controller when the height of the handrail plate is adjusted can be avoided, and has a strong sense of high quality.

Due to the application of the technical scheme, compared with the prior art, the invention has the following advantages:

the invention provides a foldable electric wheelchair, comprising: a wheelchair frame having an expanded and collapsed state, a wheel assembly located at the bottom of the wheelchair frame, an electric drive assembly for driving the wheel assembly to rotate, a wheelchair frame locking mechanism for locking the wheelchair frame in the expanded state, the wheelchair frame comprising: the front part of the chair frame extends along the horizontal direction, the rear part of the chair frame extends downwards and slantways, the front wheel bracket, the upper end part of which is rotatably connected with the front end part of the rear wheel bracket, the lower end part of which is rotatably connected with the rear part of the rear wheel bracket, the connecting rod, the backrest bracket, the lower end part of which is rotatably connected with the upper end part of the supporting rod, and the handrail bracket, wherein the front end part and the rear end part of the connecting rod are respectively rotatably connected with the front wheel bracket and the rear wheel bracket, the two end parts of the handrail bracket are respectively rotatably connected with the rear wheel bracket and the backrest bracket, so that the front wheel bracket, the connecting rod, the supporting rod and the rear wheel bracket form a first four-bar mechanism, the rear wheel bracket, the supporting rod, the backrest bracket and the handrail bracket form a second four-bar mechanism, the two four-bar mechanisms share the rear wheel bracket and, the design is ingenious, the structure is simple, and the operation is convenient; the electric drive is adopted, and the use is convenient.

Drawings

Fig. 1 is a schematic perspective view of a preferred embodiment of the present invention.

Figure 2 is a side view of figure 1 with the wheelchair frame in a deployed condition.

Fig. 3 is a side view of the chair of fig. 1 during the transition from the unfolded position to the folded position.

Figure 4 is a side view of figure 1 with the wheelchair frame in a folded condition.

Fig. 5 is an enlarged schematic view, partially in section, of the armrest assembly of fig. 2.

Fig. 6 is a schematic sectional view in the direction of a-a in fig. 5.

Fig. 7 is an exploded perspective view of fig. 5.

Wherein: 10. a wheelchair frame; 11. a rear wheel support; 12. a front wheel bracket; 13. a support bar; 14. a connecting rod; 15. a backrest support; 16. a handrail support; 161. a handrail plate; 162. a support plate; 1621. connecting blocks; 1622. a chute; 163. mounting holes; 164. an armrest locking assembly; 1641. a locking hole; 1642. a locking block; 1643. a third rotating shaft; 165. a handle; 1651. a guide groove; 1652. a guide shaft; 1653. a limiting groove; 1654. a handle body; 1655. a connecting rod; 1656. a slider; 1657. a spring; 17. a first rotating shaft; 18. a second rotating shaft; 19. a seat; 20. a foot pedal; 21. a front wheel assembly; 22. a rear wheel assembly; 31. a motor; 32. a battery; 33. a controller; 40. a wheelchair frame locking mechanism; 41. the handle is unlocked.

Detailed Description

The following detailed description of the preferred embodiments of the present invention, taken in conjunction with the accompanying drawings, will make the advantages and features of the invention easier to understand by those skilled in the art, and thus will clearly and clearly define the scope of the invention.

The front-rear direction, the left-right direction, and the up-down direction described in the present invention are based on the front-rear direction, the left-right direction, and the up-down direction as viewed by a rider when riding the foldable electric wheelchair provided by the present invention, and specifically, the up-down direction described in the present invention refers to the up-down direction in fig. 2, the front-rear direction described in the present invention refers to the left-right direction in fig. 2, and the left-right direction described in the present invention refers to the inside-outside direction in fig. 2.

The invention will be further described with reference to examples of embodiments shown in the drawings to which the invention is attached.

As shown in fig. 1 to 4, the present invention provides a foldable electric wheelchair including a wheelchair frame 10 having an unfolded and folded state, a wheel assembly provided at the bottom of the wheelchair frame 10, an electric driving assembly for driving the wheel assembly to rotate, and a wheelchair frame locking mechanism 40 for locking the wheelchair frame 10 in the unfolded state, the wheelchair frame 10 including: the bicycle comprises a rear wheel bracket 11, a front wheel bracket 12, a support rod 13, a connecting rod 14, a backrest bracket 15, an armrest bracket 16 and a pedal plate 20, wherein the front part of the rear wheel bracket 11 extends along the horizontal direction and is used for supporting a seat 19, and the rear part of the rear wheel bracket 11 extends obliquely downwards and backwards; the front wheel bracket 12 is positioned at the front lower part of the seat 19, and the upper end part of the front wheel bracket 12 is rotationally connected with the front end part of the rear wheel bracket 11; the support rod 13 is positioned at the rear lower part of the seat 19, and the lower end part of the support rod 13 is rotatably connected with the middle position of the rear part of the rear wheel bracket 11; the connecting rod 14 extends obliquely from front to bottom and back to top, the front end of the connecting rod 14 is rotatably connected with the lower end of the front wheel bracket 12, and the back end of the connecting rod 14 is rotatably connected with the upper end of the supporting rod 13, so that the front wheel bracket 12, the connecting rod 14, the supporting rod 13 and the back wheel bracket 11 form a first four-bar linkage; the lower end part of the backrest bracket 15 is rotationally connected with the upper end part of the support rod 13; the armrest support 16 is positioned at two sides of the seat 19, the front part of the armrest support 16 extends obliquely towards the front lower part, the rear part of the armrest support 16 extends along the horizontal direction, the front end part of the armrest support 16 is rotatably connected with the front end part of the rear wheel support 11, the rear end part of the armrest support 16 is rotatably connected with the middle part of the backrest support 15, so that the rear wheel support 11, the support rod 13, the backrest support 15 and the armrest support 16 form a second four-bar linkage mechanism, the two four-bar linkage mechanisms share the rear wheel support 11 and the support rod 13, the locking and the unlocking of the wheelchair frame 10 can be realized by only controlling one four-bar linkage mechanism, and the wheelchair frame is ingenious in concept, simple in structure and convenient to operate.

The wheel assembly includes a front wheel assembly 21 at the bottom of the front wheel bracket 12 and a rear wheel assembly 22 at the bottom of the rear wheel bracket 11.

The front end of the armrest support 16, the upper end of the front wheel support 12, and the front end of the rear wheel support 11 share the first pivot shaft 17, and the lower end of the backrest support 15, the upper end of the support rod 13, and the rear end of the connecting rod 14 share the second pivot shaft 18, so that the wheelchair frame 10 is more compact in structure and more highly sophisticated.

The wheelchair frame locking mechanism 40 enables the wheelchair frame 10 to be locked in the unfolded state through locking the relative positions of the connecting rod 14 and the supporting rod 13, the wheelchair frame locking mechanism 40 comprises an unlocking handle 41, the unlocking handle 41 is rotatably connected to the upper end part of the supporting rod 13 through the second rotating shaft 18, the unlocking handle 41 of the wheelchair frame locking mechanism 40 is arranged at the middle position of the rear part of the foldable electric wheelchair, the unlocking handle 41 adopts a rotary unlocking mode, false triggering is not prone to occurring, and safety is better.

As shown in fig. 1 and 5-7, the armrest support 16 is provided with a height-adjustable armrest, the armrest comprises an armrest plate 161 and a support plate 162, the armrest plate 161 is parallel to the rear portion of the armrest support 16, the upper end portion of the support plate 162 is connected to the bottom of the armrest plate 161, the lower end portion of the support plate 162 is slidably inserted into a mounting hole 163 formed in the front portion of the armrest support 16, and the extending direction of the support plate 162 coincides with the extending direction of the front portion of the armrest support 16, so that the armrest support can support the elbow of a user and is suitable for users with different heights, and therefore the universality and the riding comfort of the foldable electric wheelchair are improved.

The armrest support 16 is further provided with an armrest locking mechanism 164 for locking the relative position of the support plate 162 and the armrest support 16, wherein the armrest locking mechanism 164 comprises a locking hole 1641, a locking block 1642, a pull handle 165 and a spring 1657, wherein the locking hole 1641 is located at the front portion of the armrest support 16, specifically, the locking hole 1641 is opened on the inner wall of the mounting hole 163 and extends in the radial direction of the mounting hole 163, the locking hole 1641 is a blind hole, at least two locking holes 1641 are provided, in this embodiment, there are two locking holes 1641, the two locking holes 1641 are provided at intervals in the axial direction of the mounting hole 163, the locking block 1642 is rotatably provided on the support plate 162 through a third rotation axis 1643, the locking block 1642 has a first working position and a second working position, when the locking block 1642 is in the first working position, the locking block 1642 is inserted into the locking hole 1641 to lock the armrest locking mechanism 164, the relative position of the support plate 162 and the armrest support plate 16 is locked, when the locking block 1642 is in the second working position, the locking block 1642 is disengaged from the locking hole 1641, so that the armrest locking mechanism 164 is unlocked, the support plate 162 can slide up and down relative to the armrest support 16, the pull handle 165 is slidably arranged on the support plate 162, the locking block 1641 can be driven to change between the first working position and the second working position when the pull handle 165 slides relative to the support plate 162, and the spring 1657 has a tendency of driving the locking block 1642 to change to the first working position, so that the operation of a user can be facilitated, and the high-grade feeling is strong.

The sliding groove 1622 is formed in the supporting plate 162, the supporting plate 162 comprises a connecting block 1621 connected to the bottom of the supporting plate 162, the connecting block 1621 is hollow in the middle, the handle 165 comprises a handle body 1654, a connecting rod 1655 and a sliding block 1656 which are sequentially connected from top to bottom, the handle body 1654 is slidably arranged on the supporting plate 162, the connecting rod 1655 is slidably arranged in the sliding groove 1622, and the sliding block 1656 is slidably arranged in the connecting block 1621, so that most of action parts of the armrest locking mechanism 164 are hidden in the mounting hole 163 and are not exposed, the stability is high, the service life is long, clamping injury to a user cannot be caused, and the safety is good.

The sliding block 1656 is provided with a limiting groove 1653, the extending direction of the limiting groove 1653 is parallel to the sliding direction of the handle 165, and the end part of the third rotating shaft 1643 is slidably arranged in the limiting groove 1653 in a penetrating manner; the sliding block 1656 is further provided with a guide groove 1651, an included angle between the extending direction of the guide groove 1651 and the sliding direction of the handle body 1654 is an acute angle, the locking block 1642 is provided with a guide shaft 1652, the guide shaft 1652 is parallel to the third rotating shaft 1643, the end portion of the guide shaft 1652 is slidably arranged in the guide groove 1651, and when the handle 165 slides on the supporting plate 162, the locking block 1641 is driven to rotate through cooperation of the guide shaft 1652 and the guide groove 1651, so that sliding of the handle 165 is ingeniously converted into rotation of the locking block 1641, and the rotation angle of the locking block 1641 can be indirectly limited.

In order to prevent the link 1655 from being caught by the groove wall of the sliding groove 1622 and the slider 1656 from being caught by the inner wall of the connecting block 1621 when the handle 165 slides, both end portions of the link 1655 are rotatably connected to the handle body 1654 and the slider 1656, respectively.

In this embodiment, the electric driving assembly includes a motor 31, a battery 32 and a controller 33, the motor 31 is disposed at the lower end of the rear wheel bracket 11 for driving the rear wheel assembly 22 to rotate, the battery 32 is disposed directly under the seat plate 19 for supplying electric power to the motor 31, the controller 33 is disposed at the front end of the armrest plate 161, electrodes (not shown) are disposed on the outer wall of the locking block 1642 and the inner wall of the locking hole 1641, the electrodes are connected in series to a control circuit of the controller 33, when the armrest locking mechanism 164 is in the locking state, the electrodes are connected to the control circuit, the controller 33 can control the motor 31 to rotate, and thus the foldable electric wheelchair has the advantages of lowering the center of gravity, making it more stable when moving, and the electric driving mode can make the user more convenient when operating the wheelchair, and avoiding the potential safety hazard caused by the user mistakenly touching the controller when adjusting the height of the armrest plate, and has a strong sense of high quality.

The front part of the armrest support 16 and the support plate 162 extend obliquely forward and downward to drive the armrest plate 161 to move forward and backward when the height of the armrest plate 161 is adjusted, so as to adapt to users with different sizes and different arm lengths, and the included angle between the extending direction of the front part of the armrest support 16 and the support plate 162 and the horizontal direction is preferably 50-70 degrees, and in the embodiment, the included angle is 63 degrees.

The above embodiments are merely illustrative of the technical concept and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the content of the present invention and implement the invention, and not to limit the scope of the invention, and all equivalent changes or modifications made according to the spirit of the present invention should be covered by the scope of the present invention.