Electric folding wheelchair capable of being disassembled quickly

Abstract

The invention provides an electric folding wheelchair capable of being quickly disassembled, relates to the technical field of wheelchairs, and aims to solve the problems that an existing electric wheelchair is large in size and inconvenient to carry and transport after being folded. Comprising a front wheel assembly, a rear wheel assembly, a disassembling assembly, a sitting assembly and a handrail assembly, the front wheel assembly comprises a front supporting rod and a front wheel installed on the front supporting rod, the disassembling assembly comprises a disassembling supporting rod, the front supporting rod is hinged to the disassembling supporting rod, and the disassembling supporting rod and the front supporting rod are arranged in an inverted V shape; the rear wheel assembly is connected to the other end of the split supporting rod through a quick release structure. The sitting assembly comprises a cushion structure fixed relative to the front supporting rod and a backrest structure hinged to the cushion structure, the disassembling assembly further comprises a connecting rod fixedly connected with the disassembling supporting rods and a linear driver installed on the connecting rod in a hinged mode, and the other end of the linear driver is hinged to the front supporting rod or the cushion structure. The handrail assembly is connected to the split supporting rod, and the angle between the handrail assembly and the split supporting rod is adjustable. The device can be quickly disassembled and is convenient to carry and transport.

Description

Technical Field

[0001] The present invention relates to the technical field of wheelchairs, and in particular to a quick-detachable electric folding wheelchair. Background Art

[0002] In order to reduce the space occupied by the wheelchair when it is idle, the prior art provides a folding wheelchair, but this folding wheelchair cannot be folded quickly during use, and still takes up a lot of space after folding, which is not convenient to place in a narrow space. In view of the above problems, an electric folding wheelchair came into being.

[0003] However, compared with conventional folding wheelchairs, since electric folding wheelchairs have an additional electric drive module, the overall weight of the device is too large, and the size after folding is also large, which is also inconvenient to place in a narrow space, and is also inconvenient to carry and transport. Summary of the invention

[0004] The object of the present invention is to provide a quick-detachable electric folding wheelchair to solve the technical problem that the existing electric wheelchairs are large in size after folding and are inconvenient to carry and transport.

[0005] The quick-detachable electric folding wheelchair provided by the present invention comprises a front wheel assembly, a rear wheel assembly, a split assembly, a riding assembly and an armrest assembly, wherein the front wheel assembly comprises front struts arranged in pairs and a front wheel installed at a first end of each of the front struts, the split assembly comprises a split support rod, the second end of each of the front struts is hinged to the split support rod, and the split support rod and the corresponding front strut are arranged in an "∧" shape, and the rear wheel assembly is connected to the other end of the split support rod through a quick-detach structure; the riding assembly comprises a seat cushion structure relatively fixed to the front strut and a backrest structure hinged to the seat cushion structure, the split assembly also comprises a connecting rod fixedly connected to each of the split support rods and a linear drive hingedly installed on the connecting rod, the other end of the linear drive is hinged to the front strut or the seat cushion structure; the armrest assembly is connected to the split support rod, and the angle between the armrest assembly and the split support rod is adjustable.

[0006] Furthermore, the rear wheel assembly includes a rear support structure and a rear wheel structure installed in pairs on the rear support structure, and the rear support structure is connected to the split support rod through the quick-release structure; the rear wheel structure includes a driving wheel and an anti-dump wheel, wherein, in the sitting mode of the electric folding wheelchair, the driving wheel is in contact with the ground and the anti-dump wheel is suspended in the air; in the folding mode of the electric folding wheelchair, the driving wheel is suspended in the air and the anti-dump wheel is in contact with the ground.

[0007] Furthermore, the rear support structure includes a supporting cross bar and shock-absorbing arms connected at two ends of the supporting cross bar, and the supporting cross bar is connected to the split supporting rod through the quick-release structure; the shock-absorbing arm includes an upper end mounting seat, a spring shock absorber, a shock-absorbing support rod and a lower end mounting seat arranged in a quadrilateral, wherein the upper end mounting seat is fixedly connected to the supporting cross bar, and the driving wheel and the anti-dump wheel are both mounted on the lower end mounting seat; the upper end of the spring shock absorber is connected to the upper end mounting seat at a first position, the lower end of the spring shock absorber is connected to the lower end mounting seat at a second position, the upper end of the shock-absorbing support rod is connected to the upper end mounting seat at a third position, and the lower end of the shock-absorbing support rod is connected to the lower end mounting seat at a fourth position, three of the first position, the second position, the third position and the fourth position are hingedly connected, and one of the first position, the second position, the third position and the fourth position is fixedly connected.

[0008] Furthermore, the supporting cross bar includes a first mounting surface, a second mounting surface and a third mounting surface arranged in sequence along its circumference, wherein the first mounting surface faces the split support rod, and the quick-release structure is arranged between the split support rod and the first mounting surface; the second mounting surface is connected to the first mounting surface in a "∧" shape, and the power module, power switch and folding button of the electric folding wheelchair are all arranged on the second mounting surface; the third mounting surface connects the first mounting surface and the second mounting surface, and the upper end mounting seat is fixedly arranged on the third mounting surface.

[0009] Further, the quick-release structure includes a limiting cavity, a split box, a split button and an elastic element, the limiting cavity is formed at one end of the split support rod close to the first mounting surface, the limiting cavity is open at one end facing the first mounting surface, the split box is fixedly connected to the first mounting surface, and the split box is at least partially accommodated in the limiting cavity; the side wall of the split box is provided with an opening, the limiting cavity is provided with a connecting port and an operating port that are directly opposite to the opening, the split button includes a button part and a hooking part, the button part passes through the operating port and the opening in sequence, and the hooking part is used to cooperate with the connecting port, wherein the split button has a locking position in which the hooking part is inserted into the connecting port, and an unlocking position in which the hooking part withdraws from the connecting port, and the elastic element is configured so that the hooking part always has a tendency to move toward the locking position; a limiting structure is also provided between the split button and the split box, and the limiting structure is configured to prevent the split button and the split box from detaching from each other.

[0010] Furthermore, the quick-release structure also includes a split shaft, which is fixedly connected to the split button and extends into the split box; the elastic element includes a compression spring, which is sleeved on the split shaft, one end of the compression spring abuts against the split box, and the other end of the compression spring abuts against the split button; and / or, the limiting structure includes a limiting long hole and a limiting pin, the limiting long hole is arranged on the split box, the limiting pin is arranged on the split button, and during the process of the split button switching between the locked position and the unlocked position, the limiting pin is configured to slide in the limiting long hole.

[0011] Furthermore, a first angle limiting structure is provided between the split support rod and the front support rod, and the first angle limiting structure is configured to limit the angle between the split support rod and the front support rod in the sitting mode and the folding mode; and / or, the seat cushion structure includes a seat cushion support frame, the backrest structure includes a backrest support frame, the seat cushion support frame is fixedly mounted on the plurality of front support rods via a first adapter frame, and the backrest support frame is hinged to the seat cushion support frame; a second angle limiting structure is provided between the backrest support frame and the seat cushion support frame, and the second angle limiting structure is configured to limit the angle between the backrest support frame and the seat cushion support frame in the sitting mode and the folding mode.

[0012] Furthermore, the front wheel is a non-powered wheel, and the front wheel is an omnidirectional wheel; and / or, the front wheel assembly also includes a pedal, and the pedal is fixedly connected to each of the front support rods.

[0013] Furthermore, the armrest assembly includes an armrest support rod and an armrest folding rod set at an angle, wherein the first end of the armrest support rod is hinged to the split support rod, the second end of the armrest support rod is hinged to the armrest folding rod, and each of the split support rods is hinged to the armrest support rod; a first indexing pin is arranged between the armrest support rod and the split support rod, and the first indexing pin is configured to fix the angle between the armrest support rod and the split support rod; a second indexing pin is arranged between the armrest folding rod and the armrest support rod, and the second indexing pin is configured to fix the angle between the armrest support rod and the armrest folding rod.

[0014] Furthermore, the electric folding wheelchair also includes a control component, which includes a direction controller, a support frame, a cover plate and a quick-release handle, wherein each of the armrest support rods is provided with a fixing hole, the support frame is provided with a boss that is plugged into and cooperates with the fixing hole along a first direction, the cover plate is used to be installed on the fixing hole along a second direction, the second direction is opposite to the first direction, the boss is provided with a connecting screw hole, the cover plate is provided with a connecting through hole opposite to the connecting screw hole, the quick-release handle is provided with an external thread, and the quick-release handle passes through the connecting through hole and is screwed on the connecting screw hole; the direction controller is fixedly arranged on the support frame, and the control component is selectively installed on one of the multiple armrest support rods; and / or, the armrest assembly also includes an armrest pad, which is fixedly arranged on the top of the armrest folding rod.

[0015] The beneficial effects brought by the quick-detachable electric folding wheelchair of the present invention are:

[0016] By providing an electric folding wheelchair mainly composed of a front wheel assembly, a rear wheel assembly, a split assembly, a riding assembly and an armrest assembly, in the sitting mode of the electric folding wheelchair, the backrest structure and the seat cushion structure are in an open state, and the user can rotate the armrest assembly to a position that does not affect the user's entry into the electric folding wheelchair from the side, so as to enter the electric folding wheelchair from the side; when the user sits on the seat cushion structure, the armrest assembly can be put down to support the arm.

[0017] When the electric folding wheelchair needs to be switched to the folding mode, the linear drive can be activated. Since one end of the linear drive is hinged to the connecting rod of the split assembly, and the other end of the linear drive is hinged to the front support rod or the cushion structure, the front support rod can be rotated toward the split assembly under the action of the linear drive, so that the front support rod and the split support rod are in a folded state, so as to realize the storage of the electric folding wheelchair in a narrow space. In addition, after the electric folding wheelchair is folded, the electric folding wheelchair can be placed in an upright state, so as to facilitate the user to push it. Moreover, the electric folding wheelchair in this state can also be used to support people with insufficient leg and foot muscle strength, and can be used as a walker for such people to assist in walking.

[0018] When the electric folding wheelchair needs to be moved or transported, or needs to be carried over a long distance, the rear wheel assembly can be removed from the split support rod, so that the electric folding wheelchair is split into multiple independent parts for separate carrying or transportation.

[0019] The electric folding wheelchair realizes automatic folding by providing a linear drive, and the front-to-back folding method can effectively reduce the volume of the electric folding wheelchair after folding, so that it is easy to place in a narrow space. In addition, by providing the rear wheel assembly to be detachably connected to the split support rod, the electric folding wheelchair can be split into several independent parts for separate transportation, which not only reduces the difficulty of handling and transportation, but also can further reduce the overall size, so that the several independent parts of the electric folding wheelchair can be transported and stored separately, reducing the demand for transportation space and storage space. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0021] Figure 1 A schematic diagram of the structure of an electric foldable wheelchair in a sitting position mode provided by an embodiment of the present invention;

[0022] Figure 2 A schematic diagram of the partial structure of an electric folding wheelchair provided in an embodiment of the present invention Figure 1 ;

[0023] Figure 3 A schematic diagram of the partial structure of the electric foldable wheelchair provided in an embodiment of the present invention when the seat cushion support frame and the backrest support frame are in a folded state;

[0024] Figure 4 An exploded schematic diagram of a quick-release structure of an electric folding wheelchair provided in an embodiment of the present invention;

[0025] Figure 5 A longitudinal sectional schematic diagram of a quick-release structure of an electric folding wheelchair provided in an embodiment of the present invention;

[0026] Figure 6 A schematic diagram of the partial structure of an electric folding wheelchair provided in an embodiment of the present invention Figure 2 ;

[0027] Figure 7 A schematic structural diagram of a support crossbar of an electric folding wheelchair provided in an embodiment of the present invention;

[0028] Figure 8 A schematic structural diagram of a front wheel assembly of an electric folding wheelchair provided in an embodiment of the present invention;

[0029] Fig. 9A schematic diagram of a partial structure of a riding assembly of an electric foldable wheelchair provided in an embodiment of the present invention;

[0030] Fig.10 A schematic diagram of the structure of an armrest assembly and a control assembly of an electric folding wheelchair provided in an embodiment of the present invention;

[0031] Fig.11 A schematic diagram of the assembly of a control assembly of an electric folding wheelchair relative to an armrest support rod provided by an embodiment of the present invention.

[0032] Description of reference numerals:

[0033] 100-front wheel assembly; 200-rear wheel assembly; 300-split assembly; 400-riding assembly; 500-armrest assembly; 600-quick release structure; 710-first angle limit structure; 720-second angle limit structure; 800-control assembly;

[0034] 110-front support rod; 120-front wheel; 130-pedal;

[0035] 210-rear support structure; 211-support cross bar; 2111-first mounting surface; 2112-second mounting surface; 2113-third mounting surface; 212-shock absorbing arm; 2121-upper end mounting seat; 2122-spring shock absorber; 2123-shock absorbing support rod; 2124-lower end mounting seat;

[0036] 220-rear wheel structure; 221-driving wheel; 222-anti-dumping wheel;

[0037] 310-split support rod; 320-connecting rod; 330-linear drive;

[0038] 410-seat cushion structure; 411-seat cushion support frame; 4112-first adapter frame; 4112-second adapter frame; 412-seat cushion; 420-backrest structure; 421-backrest support frame; 422-backrest;

[0039] 510-armrest support rod; 511-fixing hole; 520-armrest folding rod; 530-armrest pad;

[0040] 610-limiting cavity; 611-connecting port; 612-operating port; 620-split box; 621-opening; 630-split button; 631-button portion; 632-hooking portion; 640-elastic element; 650-limiting structure; 651-limiting long hole; 652-limiting pin; 660-split shaft;

[0041] 810-direction controller; 820-support frame; 821-boss; 830-cover plate; 840-quick release handle;

[0042] 910 - power module; 920 - power switch; 930 - folding button. DETAILED DESCRIPTION

[0043] In order to make the above-mentioned objects, features and advantages of the present invention more clearly understood, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0044] like Figure 1 As shown, this embodiment provides an electric folding wheelchair, including a front wheel assembly 100, a rear wheel assembly 200, a split assembly 300, a riding assembly 400 and an armrest assembly 500, wherein the front wheel assembly 100 includes front struts 110 arranged in pairs and a front wheel 120 installed at a first end of each front strut 110, the split assembly 300 includes a split support rod 310, the second end of each front strut 110 is hinged with the split support rod 310, and the split support rod 310 and the corresponding front strut 110 are arranged in a "∧" shape, and the rear wheel assembly 200 includes a front wheel 110 and a rear wheel 120 installed at a first end of each front strut 110, and the rear wheel assembly 200 includes a front wheel 110 and a rear wheel 120 installed at a first end of each front strut 110, and the rear wheel 1 ... 00 is connected to the other end of the split support rod 310 through a quick-release structure 600; the riding component 400 includes a cushion structure 410 fixed relatively to the front support rod 110 and a backrest structure 420 hinged to the cushion structure 410, the split component 300 also includes a connecting rod 320 fixedly connected to each split support rod 310 and a linear drive 330 hingedly installed on the connecting rod 320, the other end of the linear drive 330 is hinged to the front support rod 110 or the cushion structure 410; the first end of the split support rod 310 is also connected to the armrest assembly 500.

[0045] In the sitting mode of the electric folding wheelchair, the backrest structure 420 and the seat cushion structure 410 are in an open state, and the user can rotate the armrest assembly 500 to a position that does not affect the user's entry into the electric folding wheelchair from the side, so as to enter the electric folding wheelchair from the side; when the user sits on the seat cushion structure 410, the armrest assembly 500 can be put down to support the arm.

[0046] When the electric folding wheelchair needs to be switched to the folding mode, the linear actuator 330 can be activated. Since one end of the linear actuator 330 is hinged to the connecting rod 320 of the split assembly 300, and the other end of the linear actuator 330 is hinged to the front support rod 110 or the cushion structure 410, the front support rod 110 can be rotated toward the split assembly 300 under the action of the linear actuator 330, so that the front support rod 110 and the split support rod 310 are in a folded state, so as to realize the storage of the electric folding wheelchair in a narrow space. In addition, after the electric folding wheelchair is folded, the electric folding wheelchair can also be placed in an upright state, so as to facilitate the user to push it. Moreover, the electric folding wheelchair in this state can also be used to support people with insufficient leg and foot muscle strength, and can be used as a walker for such people to assist in walking.

[0047] When the electric folding wheelchair needs to be moved or transported, or needs to be carried over a long distance, the rear wheel assembly 200 can be removed from the split support rod 310, so that the electric folding wheelchair is split into multiple independent parts for separate carrying or transportation.

[0048] The electric folding wheelchair realizes automatic folding by providing a linear drive 330, and the front-to-back folding method can effectively reduce the volume of the electric folding wheelchair after folding, so that it is easy to place in a narrow space. In addition, by providing the rear wheel assembly 200 to be detachably connected to the split support rod 310, the electric folding wheelchair can be split into several independent parts for separate transportation, which not only reduces the difficulty of handling and transportation, but also can further reduce the overall size, so that the several independent parts of the electric folding wheelchair can be transported and stored separately, reducing the demand for transportation space and storage space.

[0049] In this embodiment, the linear drive 330 may be an electric push rod.

[0050] like Figure 2 and Figure 3 As shown, the rear wheel assembly 200 includes a rear support structure 210 and a rear wheel structure 220 installed in pairs on the rear support structure 210, and the rear support structure 210 is connected to the split support rod 310 through a quick release structure 600; the rear wheel structure 220 includes a driving wheel 221 and an anti-dump wheel 222, wherein, in the sitting mode of the electric folding wheelchair, the driving wheel 221 is in contact with the ground, and the anti-dump wheel 222 is suspended; in the folding mode of the electric folding wheelchair, the driving wheel 221 is suspended, and the anti-dump wheel 222 is in contact with the ground.

[0051] By configuring the rear wheel structure 220 to include a driving wheel 221 and an anti-dump wheel 222, when the electric folding wheel is used in the sitting mode, the driving wheel 221 is in contact with the ground to provide the driving force for the electric folding wheelchair to move, and at this time, the anti-dump wheel 222 is suspended in the air to ensure the stability of the electric folding wheelchair during use and prevent the electric folding wheelchair from tipping over; when the electric folding wheelchair is used in the folding mode, the driving wheel 221 is suspended in the air and the anti-dump wheel 222 is in contact with the ground, and at this time, the front wheel 120 and the anti-dump wheel 222 touch the ground together, and by adjusting the angle of the armrest assembly 500 relative to the split support rod 310, the armrest assembly 500 is adjusted to a suitable angle, and can also be pushed by the user to serve as a support structure for the user's autonomous walking.

[0052] It can be seen that the provision of the anti-dump wheel 222 can not only ensure the stability of the electric folding wheelchair when used in the sitting mode, but also play a supporting role in pushing the electric folding wheelchair when it is in the folding mode, thereby ensuring stability during the pushing process.

[0053] Please continue to refer to Figure 1 In this embodiment, both the front wheel 120 and the driving wheel 221 have hub covers, which can provide a certain degree of protection for the corresponding wheel bodies and also prevent splashing of mud and water.

[0054] Please continue to refer to Figure 2 In this embodiment, the anti-dump wheel 222 may include a mounting base, a supporting guide rod and a silent wheel, wherein the mounting base is fixedly mounted relative to the fixed part of the driving wheel 221; the supporting guide rod is mounted on the mounting base; the silent wheel is rotatably connected to the supporting guide rod and supported by the supporting guide rod, and the anti-dump wheel 222 contacts the ground through the silent wheel.

[0055] Please continue to refer to Figure 2 and Figure 3 , and combined with Figure 6 In this embodiment, the rear support structure 210 includes a support cross bar 211 and a shock absorbing arm 212 connected to both ends of the support cross bar 211. Specifically, the support cross bar 211 is connected to the split support bar 310 through a quick release structure 600; the shock absorbing arm 212 includes an upper end mounting seat 2121, a spring shock absorber 2122, a shock absorbing support bar 2123 and a lower end mounting seat 2124 arranged in a quadrilateral, wherein the upper end mounting seat 2121 Fixedly connected to the supporting cross bar 211, the driving wheel 221 and the anti-dump wheel 222 are both mounted on the lower end mounting seat 2124; the upper end of the spring shock absorber 2122 is hinged to the upper end mounting seat 2121, and the lower end of the spring shock absorber 2122 is hinged to the lower end mounting seat 2124; the upper end of the shock-absorbing support rod 2123 is fixedly connected to the upper end mounting seat 2121, and the lower end of the shock-absorbing support rod 2123 is hinged to the lower end mounting seat 2124.

[0056] The above-mentioned arrangement of the shock-absorbing arm 212 forms a quadrilateral structure with three revolving pairs, wherein the three revolving pairs are respectively the hinge between the upper end of the spring shock absorber 2122 and the upper end mounting seat 2121, the hinge between the lower end of the spring shock absorber 2122 and the lower end mounting seat 2124, and the hinge between the lower end of the shock-absorbing support rod 2123 and the lower end mounting seat 2124. As a result, when the electric folding wheelchair encounters potholes during travel, the vibration force will be transmitted to the spring shock absorber 2122, so that the spring shock absorber 2122 is compressed, the angles between the three revolving pairs change, and the force is borne by the deformation of the spring shock absorber 2122, thereby playing a shock-absorbing role to ensure the comfort of the electric folding wheelchair during use.

[0057] The above-mentioned setting form of the shock absorbing arm 212 can not only play an effective shock absorbing role, but also ensure the structural strength of the shock absorbing arm 212 by setting the shock absorbing arm 212 to include spaced spring shock absorbers 2122 and shock absorbing support rods 2123, thereby ensuring the support stability of the riding component 400 and its upper parts.

[0058] It should be noted that, in this embodiment, the upper end of the spring shock absorber 2122 is connected to the upper end mounting seat 2121 at a first position, the lower end of the spring shock absorber 2122 is connected to the lower end mounting seat 2124 at a second position, the upper end of the shock absorbing support rod 2123 is connected to the upper end mounting seat 2121 at a third position, and the lower end of the shock absorbing support rod 2123 is connected to the lower end mounting seat 2124 at a fourth position. For the scheme shown in the accompanying drawings of this embodiment, the first position, the second position and the fourth position are hinged connections, and the third position is a fixed connection.

[0059] In other embodiments, the three positions of the hinged connection may also be the first position, the second position and the third position. In this case, the fourth position is a fixed connection, that is, the upper end of the spring shock absorber 2122 is hinged to the upper end mounting seat 2121, the lower end of the spring shock absorber 2122 is hinged to the lower end mounting seat 2124, the upper end of the shock absorbing support rod 2123 is hinged to the upper end mounting seat 2121, and the lower end of the shock absorbing support rod 2123 is fixedly connected to the lower end mounting seat 2124. As long as a rotating pair is formed at three of the above four positions and a fixed connection is formed at the remaining one, the purpose of shock absorption can be achieved. This embodiment only exemplifies one of the shock absorbing connection methods in the form of a drawing, and is not a limitation of the present invention.

[0060] Please continue to refer to Figure 6 , and combined with Figure 7In this embodiment, the supporting cross bar 211 includes a first mounting surface 2111, a second mounting surface 2112 and a third mounting surface 2113 arranged in sequence along its circumference, wherein the first mounting surface 2111 faces the split support rod 310, and the quick-release structure 600 is arranged between the split support rod 310 and the first mounting surface 2111; the second mounting surface 2112 is connected to the first mounting surface 2111 in an "∧" shape, and the power module 910, the power switch 920 and the folding button 930 of the electric folding wheelchair are all arranged on the second mounting surface 2112; the third mounting surface 2113 connects the first mounting surface 2111 and the second mounting surface 2112, and the upper end mounting seat 2121 is fixedly arranged on the third mounting surface 2113.

[0061] By setting the support cross bar 211 to a form including a first mounting surface 2111, a second mounting surface 2112 and a third mounting surface 2113 arranged in sequence, on the one hand, the split support bar 310, the power module 910 and other electrical structures and the shock absorbing arm 212 can be arranged in different areas to avoid interference between components. On the other hand, the structural strength of the support cross bar 211 can also be ensured, thereby improving the support reliability.

[0062] It should be noted that, in this embodiment, how the power module 910 supplies power to the linear drive 330, how the power switch 920 controls the turning on and off of the power module 910, and how the folding button 930 controls the linear drive 330 to extend or retract to achieve the purpose of unfolding or folding the electric folding wheelchair are all things that can be obtained by those skilled in the art based on the prior art. This embodiment does not make any improvements on this, so it will not be repeated here.

[0063] In addition, in this embodiment, an electric control device installation box for placing electric control equipment is also installed on the third installation surface 2113.

[0064] Please continue to refer to Figure 7 In this embodiment, the support crossbar 211 is a hollow structure, and the third mounting surface 2113 is provided with a hollow hole. This arrangement can not only reduce weight, which is beneficial to the lightweight design of the electric folding wheelchair in this embodiment, but also can dissipate heat for electrical structures such as the power module 910.

[0065] like Figure 4 and Figure 5As shown, in this embodiment, the quick-release structure 600 includes a limiting cavity 610, a split box 620, a split button 630 and an elastic element 640. Specifically, the limiting cavity 610 is formed at one end of the split support rod 310 close to the first mounting surface 2111, and the end of the limiting cavity 610 facing the first mounting surface 2111 is open. The split box 620 is fixedly connected to the first mounting surface 2111, and the split box 620 is at least partially accommodated in the limiting cavity 610; the side wall of the split box 620 is provided with an opening 621, and the limiting cavity 610 is provided with a connecting port 611 and an operating port 612 which are directly opposite to the opening 621. The split button 630 is provided with a connecting port 611 and an operating port 612 which are directly opposite to the opening 621. 630 includes a button portion 631 and a hooking portion 632, the button portion 631 passes through the operation port 612 and the opening 621 in sequence, the hooking portion 632 is used to cooperate with the connection port 611, wherein the split button 630 has a locking position in which the hooking portion 632 is inserted into the connection port 611, and an unlocking position in which the hooking portion 632 exits the connection port 611, and the elastic element 640 is configured to make the hooking portion 632 always have a tendency to move toward the locking position; a limiting structure 650 is also arranged between the split button 630 and the split box 620, and the limiting structure 650 is configured to prevent the split button 630 and the split box 620 from detaching from each other.

[0066] When the rear wheel assembly 200 needs to be disassembled, the button portion 631 of the split button 630 can be pressed to move the button portion 631 toward the split box 620. During this process, the elastic element 640 is compressed, and the hooking portion 632 withdraws from the connecting port 611 to the split box 620, releasing the locking connection with the limiting cavity 610, so that the limiting cavity 610 can be taken out from the split box 620, thereby achieving the purpose of disassembling the rear wheel assembly 200. After the disassembly of the wheel assembly 200 is completed, when the split button 630 is released, the elastic element 640 will move toward the opening 621 under the action of the elastic restoring force, and under the restriction of the limiting structure 650, the split button 630 and the split box 620 are still kept in the assembled state, and the two will not be separated from each other. When the rear wheel assembly 200 needs to be assembled to the split support rod 310, the limiting cavity 610 can be inserted into the split box 620 through the opening, and the button portion 631 of the split button 630 can be pressed to move the button portion 631 toward the split box 620. During this process, the elastic element 640 is compressed, and the hooking portion 632 enters the interior of the split box 620, so that the limiting cavity 610 can be smoothly inserted into the split box 620 so that the connecting port 611 can be opposite to the lateral opening 621 of the split box 620. After that, the split button 630 is released, and under the action of the elastic restoring force, the hooking portion 632 of the split button 630 will be stuck in the connecting port 611, so as to realize the connection between the split box 620 and the limiting cavity 610, that is, to realize the assembly of the rear wheel assembly 200.

[0067] This arrangement of the quick-release structure 600 can not only realize the rapid disassembly and installation of the rear wheel assembly 200, thereby improving the assembly and disassembly efficiency of the rear wheel assembly 200, but also can utilize the embedded cooperation of the limiting cavity 610 and the split box 620 to ensure the structural stability of the connection between the rear wheel assembly 200 and the split support rod 310, thereby reducing the shaking of the rear wheel assembly 200.

[0068] Please continue to refer to Figure 4 and Figure 5 In this embodiment, the quick-release structure 600 may further include a split shaft 660, which is fixedly connected to the split button 630 and extends into the split box 620; the elastic element 640 includes a compression spring, which is sleeved on the split shaft 660, one end of the compression spring abuts against the split box 620, and the other end of the compression spring abuts against the split button 630.

[0069] By setting a split shaft 660 in the quick-release structure 600 and setting the elastic element 640 as a compression spring sleeved on the split shaft 660, on the one hand, the split shaft 660 can be used to limit the elastic element 640 and prevent the elastic element 640 from falling off from between the split button 630 and the split box 620. On the other hand, it can also play a guiding role for the elastic element 640, so that the elastic expansion and contraction direction of the elastic element 640 is always along the movement direction of the split button 630, thereby avoiding bending of the elastic element 640.

[0070] Please continue to refer to Figure 4 and Figure 5 In this embodiment, the limiting structure 650 may include a limiting long hole 651 and a limiting pin 652, wherein the limiting long hole 651 is set on the split box 620, and the limiting pin 652 is set on the split button 630. When the split button 630 switches between the locked position and the unlocked position, the limiting pin 652 is configured to slide in the limiting long hole 651.

[0071] This setting of the limiting structure 650 can not only limit the split button 630 and prevent the split button 630 from falling off from the split box 620, but also utilize the sliding of the limiting pin 652 in the limiting long hole 651 to guide the movement of the split button 630 and ensure the smoothness of pressing the split button 630.

[0072] Please continue to refer to Figure 2 In this embodiment, a first angle limiting structure 710 is provided between the split support rod 310 and the front support rod 110, and the first angle limiting structure 710 is configured to limit the angle between the split support rod 310 and the front support rod 110 in the sitting mode and the folding mode.

[0073] The setting of the first angle limiting structure 710 can play an angle limiting role in the folding process of the split support rod 310 and the front support rod 110, thereby preventing the split support rod 310 and the front support rod 110 from excessive movement during the process of switching between the sitting mode and the folding mode.

[0074] Please continue to refer to Figure 3 , and combined with Fig. 9 In this embodiment, the seat cushion structure 410 may include a seat cushion support frame 411, and the backrest structure 420 may include a backrest support frame 421, wherein the seat cushion support frame 411 is fixedly mounted on the two front support rods 110 through a first adapter frame 4111, and the backrest support frame 421 is hinged to the seat cushion support frame 411; a second angle limiting structure 720 is arranged between the backrest support frame 421 and the seat cushion support frame 411, and the second angle limiting structure 720 is configured to limit the angle between the backrest support frame 421 and the seat cushion support frame 411 in the sitting mode and the folding mode.

[0075] The setting of the second angle limiting structure 720 can limit the relative angle of the seat cushion support frame 411 and the backrest support frame 421 within a certain angle range, so that the angle between the seat cushion support frame 411 and the backrest support frame 421 will not be too large, but will be maintained at an ergonomically designed angle to provide users with comfort when sitting.

[0076] In this embodiment, a fixing pin may be further provided between the seat cushion support frame 411 and the backrest support frame 421 to fix the relative angle between the seat cushion support frame 411 and the backrest support frame 421 after the angle adjustment of the seat cushion support frame 411 and the backrest support frame 421 is completed.

[0077] Please continue to refer to Figure 1 In this embodiment, the cushion structure 410 may further include a cushion 412, and the backrest structure 420 may further include a backrest 422. This arrangement can increase the comfort of the user when sitting and leaning.

[0078] Please continue to refer to Fig. 9 In this embodiment, a second adapter frame 4112 is provided at the front end of the seat cushion support frame 411, wherein the protruding end of the linear drive 330 is hinged to the second adapter frame 4112, that is, one end of the linear drive 330 of the electric folding wheelchair is hinged to the connecting rod 320 of the split assembly 300, and the other end is hinged to the above-mentioned second adapter frame 4112.

[0079] In this embodiment, the front wheel 120 is a non-powered wheel, and the front wheel 120 is an omnidirectional wheel. That is, in the electric folding wheelchair, the front wheel 120 is a driven wheel. This setting can ensure the walking flexibility of the electric folding wheelchair of this embodiment and meet the user's omnidirectional walking needs.

[0080] Please continue to refer to Figure 1 , and combined with Figure 8 In this embodiment, the front wheel assembly 100 may further include a pedal 130 , wherein the pedal 130 is fixedly connected to the two front support rods 110 .

[0081] The pedal 130 is provided so that when the electric folding wheelchair is used in the sitting mode, the user's feet can be supported by the pedal 130, thereby reducing the force on the user's legs.

[0082] like Fig.10 As shown, the armrest assembly 500 may include an armrest support rod 510 and an armrest folding rod 520 that are set at an angle, wherein the first end of the armrest support rod 510 is hinged to the split support rod 310, and the second end of the armrest support rod 510 is hinged to the armrest folding rod 520, and each split support rod 310 is hinged to the armrest support rod 510; a first indexing pin is arranged between the armrest support rod 510 and the split support rod 310, and the first indexing pin is configured to fix the angle between the armrest support rod 510 and the split support rod 310; a second indexing pin is arranged between the armrest folding rod 520 and the armrest support rod 510, and the second indexing pin is configured to fix the angle between the armrest support rod 510 and the armrest folding rod 520.

[0083] When the electric folding wheelchair is required to be used in a sitting mode, at this time, under the action of the linear drive 330, the rear wheel assembly 200 and the front wheel assembly 100 are in an open state, the driving wheel 221 of the rear wheel assembly 200 touches the ground, and the anti-dump wheel 222 is suspended in the air; when the user is ready to enter the electric folding wheelchair from the side, the first indexing pin can be used to adjust the angle between the armrest support rod 510 and the split support rod 310, and the second indexing pin can be used to adjust the angle between the armrest folding rod 520 and the armrest support rod 510, so that the electric folding wheelchair is basically unobstructed in the lateral direction, so that the user can enter the electric folding wheelchair from the side for use; after the user sits in the riding assembly 400, the first indexing pin can be used to adjust the angle between the armrest support rod 510 and the split support rod 310, and the second indexing pin can be used to adjust the angle between the armrest folding rod 520 and the armrest support rod 510, so that the armrest folding rod 520 and the armrest support rod 510 are at an angle suitable for the user to hold by hand.

[0084] This arrangement of the armrest assembly 500 can facilitate the user to enter the electric folding wheelchair from the side, thereby improving the user experience.

[0085] Please continue to refer to Fig.10 In this embodiment, the armrest assembly 500 may further include an armrest pad 530 , wherein the armrest pad 530 is fixedly disposed on the top of the armrest folding rod 520 .

[0086] The provision of the armrest pad 530 ensures the comfort of the user's arm support.

[0087] Please continue to refer to Figure 1 and Fig.10 , and combined with Fig.11 In this embodiment, the electric folding wheelchair may further include a control assembly 800, which includes a direction controller 810, a support frame 820, a cover plate 830 and a quick release handle 840, wherein each armrest support rod 510 is provided with a fixing hole 511, the support frame 820 is provided with a boss 821 plugged with the fixing hole 511 along a first direction, the cover plate 830 is used to be installed in the fixing hole 511 along a second direction, the second direction is opposite to the first direction, the boss 821 is provided with a connecting screw hole, the cover plate 830 is provided with a connecting through hole opposite to the connecting screw hole, the quick release handle 840 is provided with an external thread, and the quick release handle 840 passes through the connecting through hole and is screwed on the connecting screw hole; the direction controller 810 is fixedly provided on the support frame 820, and the control assembly 800 is selectively installed on one of the multiple armrest support rods 510. The first direction is the direction from the side of the electric folding wheelchair to the outside, and correspondingly, the second direction is the direction from the side of the electric folding wheelchair to the inside.

[0088] When the control assembly 800 needs to be installed, the boss 821 of the support frame 820 can be inserted into the fixing hole 511 provided in the corresponding armrest support rod 510 from a first direction according to the user's usage habits (for example, when the user is accustomed to left-hand operation, the control assembly 800 can be installed on the left armrest support rod 510, and when the user is accustomed to right-hand operation, the control assembly 800 can be installed on the right armrest support rod 510). Then, the cover plate 830 is installed in the above-mentioned fixing hole 511 from a second direction so that the cover plate 830 is opposite to the boss 821. Thereafter, the quick-release handle 840 is passed through the cover plate 830 and screwed on the connecting screw hole of the boss 821, so that the cover plate 830 and the support frame 820 are fixed to the armrest support rod 510, thereby achieving the assembly purpose of the control assembly 800.

[0089] This arrangement of the control assembly 800 enables the user to fix the control assembly 800 on the left or right side of the automatic folding wheelchair according to their own needs, which is suitable for the operating habits of different users. In addition, it is also convenient to remove the control assembly 800 and pack it separately for transportation during transportation.

[0090] In this embodiment, the quick release handle 840 is a star-shaped handle.

[0091] It should be noted that, in this embodiment, how to control the travel direction of the electric folding wheelchair through the direction controller 810 can be obtained by those skilled in the art according to the prior art, and it is not the focus of improvement of the present invention, so it will not be described in detail.

[0092] In this embodiment, the front support rod 110, the front wheel 120, the shock absorbing arm 212, the rear wheel structure 220 and the armrest assembly 500 are each provided with two groups to meet the basic use requirements of the electric folding wheelchair. In addition, the front support rod 110, the armrest support rod 510 and the armrest folding rod 520 are each provided with a plurality of hollow holes, which can reduce the overall weight of the electric folding wheelchair while ensuring the support strength.

[0093] The working process of the electric folding wheelchair mainly includes two modes, namely, a sitting mode and a folding mode. When used in the sitting mode, the user adjusts the angle of the backrest support frame 421 relative to the seat cushion support frame 411 and fixes it. After confirming that the driving wheel 221 is in a non-self-locking state, the power switch 920 is turned on; thereafter, the armrest folding rod 520 and the armrest support rod 510 on the side of the electric folding wheelchair are opened and closed to enter the wheelchair; when the user sits firmly, the armrest folding rod 520 and the armrest support rod 510 are put down, and the operation button of the direction controller 810 is pressed, and the driving function of the electric folding wheelchair can be performed through the direction controller 810.

[0094] When the folding mode is used, the user leaves the riding assembly 400. At this time, the user can stand behind the electric folding wheelchair, and when the power switch 920 is in the on state, press the folding button 930 to activate the linear drive 330 to achieve the folding purpose of the electric folding wheelchair; when the electric folding wheelchair is folded to the set angle position, the driving wheel 221 is suspended in the air and the anti-dumping wheel 222 touches the ground, turn off the power switch 920, adjust the armrest folding rod 520 to a suitable angle position, and then assist in pushing.

[0095] When the electric folding wheelchair needs to be packaged for transportation or carried over long distances, the user can place the electric folding wheelchair in folding mode, place it steadily and turn off the power switch 920, and then place both hands on the quick-release structure 600 on both sides. By applying pressing force to the split buttons 630 on both sides at the same time, the corresponding hooking part 632 is withdrawn from the connecting port 611 of the limiting cavity 610, and the rear wheel assembly 200 and the components installed on the rear support structure 210 can be removed together, thereby achieving the purpose of quick release and improving the convenience during transportation and carrying.

[0096] It can be seen that the electric folding wheelchair can fit the ergonomic angles of the thighs and back in a sitting state to improve comfort; it can be automatically folded front and back to facilitate the user's placement before and after using the wheelchair; it can be used as an auxiliary support structure, pushed by the user, to provide support for the user when walking; according to the needs of long-distance transportation and outdoor use, the rear wheel assembly 200 can be disassembled through the quick-release structure 600 for packaging and transportation, and at the same time, the weight of a single load can be reduced.

[0097] Although the present invention is disclosed as above, the present invention is not limited thereto. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the scope defined by the claims.

[0098] Finally, it should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the term "comprises" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprises a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0099] In the above embodiments, the descriptions of directions such as “upper”, “lower”, “left”, “right”, and “side” are all based on the drawings.

[0100] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A quick-detachable electric folding wheelchair. It is characterized in that The invention comprises a front wheel assembly (100), a rear wheel assembly (200), a split assembly (300), a riding assembly (400) and a handrail assembly (500), wherein the front wheel assembly (100) comprises front struts (110) arranged in pairs and a front wheel (120) mounted on the first end of each front strut (110); the split assembly (300) comprises a split support rod (310); the second end of each front strut (110) is hinged to the split support rod (310), and the split support rod (310) and the corresponding front strut (110) are arranged in a "∧" shape; the rear wheel assembly (200) is connected to the split support rod (310) via a quick-release structure (600). the other end of the front support rod (110); the riding component (400) comprises a cushion structure (410) fixed relative to the front support rod (110) and a backrest structure (420) hinged to the cushion structure (410); the split component (300) further comprises a connecting rod (320) fixedly connected to each of the split support rods (310) and a linear driver (330) hingedly mounted on the connecting rod (320); the other end of the linear driver (330) is hingedly connected to the front support rod (110) or the cushion structure (410); the armrest component (500) is connected to the split support rod (310), and the angle between the armrest component (500) and the split support rod (310) is adjustable.

2. The electric folding wheelchair according to claim 1, It is characterized in that The rear wheel assembly (200) comprises a rear support structure (210) and a rear wheel structure (220) mounted in pairs on the rear support structure (210), wherein the rear support structure (210) is connected to the split support rod (310) via the quick-release structure (600); the rear wheel structure (220) comprises a driving wheel (221) and an anti-dumping wheel (222), wherein in the sitting mode of the electric folding wheelchair, the driving wheel (221) is in contact with the ground, and the anti-dumping wheel (222) is suspended in the air; and in the folding mode of the electric folding wheelchair, the driving wheel (221) is suspended in the air, and the anti-dumping wheel (222) is in contact with the ground.

3. The electric folding wheelchair according to claim 2, It is characterized in that The rear support structure (210) comprises a support cross bar (211) and shock absorbing arms (212) connected to both ends of the support cross bar (211), wherein the support cross bar (211) is connected to the split support bar (310) via the quick-release structure (600); the shock absorbing arm (212) comprises an upper end mounting seat (2121), a spring shock absorber (2122), a shock absorbing support bar (2123) and a lower end mounting seat (2124) arranged in a quadrilateral, wherein the upper end mounting seat (2121) is fixedly connected to the support cross bar (211), and the driving wheel (221) and the anti-dumping wheel (222) are both mounted on the lower end mounting seat (2124); The upper end of the spring shock absorber (2122) is connected to the upper end mounting seat (2121) at a first position, the lower end of the spring shock absorber (2122) is connected to the lower end mounting seat (2124) at a second position, the upper end of the shock absorbing support rod (2123) is connected to the upper end mounting seat (2121) at a third position, and the lower end of the shock absorbing support rod (2123) is connected to the lower end mounting seat (2124) at a fourth position, three of the first position, the second position, the third position and the fourth position are hingedly connected, and one of the first position, the second position, the third position and the fourth position is fixedly connected.

4. The electric folding wheelchair according to claim 3, It is characterized in that The supporting cross bar (211) comprises a first mounting surface (2111), a second mounting surface (2112) and a third mounting surface (2113) which are sequentially arranged along its circumference, wherein the first mounting surface (2111) faces the split supporting rod (310), and the quick-release structure (600) is arranged between the split supporting rod (310) and the first mounting surface (2111); the second mounting surface (2112) is connected to the first mounting surface (2111) in a "∧" shape, and the power module (910), the power switch (920) and the folding button (930) of the electric folding wheelchair are all arranged on the second mounting surface (2112); the third mounting surface (2113) connects the first mounting surface (2111) and the second mounting surface (2112), and the upper end mounting seat (2121) is fixedly arranged on the third mounting surface (2113).

5. The electric folding wheelchair according to claim 4, It is characterized in that The quick-release structure (600) comprises a limiting cavity (610), a split box (620), a split button (630) and an elastic element (640); the limiting cavity (610) is formed at one end of the split support rod (310) close to the first mounting surface (2111); the end of the limiting cavity (610) facing the first mounting surface (2111) is open; the split box (620) is fixedly connected to the first mounting surface (2111), and the split box (620) is at least partially accommodated in the limiting cavity (610); the side wall of the split box (620) is provided with an opening (621); the limiting cavity (610) is provided with a connecting port (611) and an operating port (612) directly opposite to the opening (621); the split button (630) comprises a button portion (631) and a hooking portion (632), the button portion (631) passes through the operation port (612) and the opening (621) in sequence, the hooking portion (632) is used to cooperate with the connection port (611), wherein the split button (630) has a locking position in which the hooking portion (632) is inserted into the connection port (611), and an unlocking position in which the hooking portion (632) exits the connection port (611), and the elastic element (640) is configured to make the hooking portion (632) always have a tendency to move toward the locking position; a limiting structure (650) is also provided between the split button (630) and the split box (620), and the limiting structure (650) is configured to prevent the split button (630) and the split box (620) from being separated from each other.

6. The electric folding wheelchair according to claim 5, It is characterized in that The quick-release structure (600) further comprises a split shaft (660), wherein the split shaft (660) is fixedly connected to the split button (630), and the split shaft (660) extends into the split box (620); the elastic element (640) comprises a compression spring, wherein the compression spring is sleeved on the split shaft (660), one end of the compression spring abuts against the split box (620), and the other end of the compression spring abuts against the split button (630); and / or the limiting structure (650) comprises a limiting long hole (651) and a limiting pin (652), wherein the limiting long hole (651) is arranged on the split box (620), and the limiting pin (652) is arranged on the split button (630), and when the split button (630) switches between the locked position and the unlocked position, the limiting pin (652) is configured to slide in the limiting long hole (651).

7. The electric folding wheelchair according to claim 1, It is characterized in that A first angle limiting structure (710) is provided between the split support rod (310) and the front support rod (110), and the first angle limiting structure (710) is configured to limit the angle between the split support rod (310) and the front support rod (110) in the sitting mode and the folding mode; and / or, the seat cushion structure (410) includes a seat cushion support frame (411), the backrest structure (420) includes a backrest support frame (421), and the seat cushion support frame (411) ) is fixedly mounted on the plurality of front support rods (110) via a first adapter frame (4111), and the backrest support frame (421) is hinged to the seat cushion support frame (411); a second angle limiting structure (720) is provided between the backrest support frame (421) and the seat cushion support frame (411), and the second angle limiting structure (720) is configured to limit the angle between the backrest support frame (421) and the seat cushion support frame (411) in a sitting mode and a folding mode.

8. The electric folding wheelchair according to claim 1, It is characterized in that The front wheel (120) is a non-powered wheel, and the front wheel (120) is an omnidirectional wheel; and / or the front wheel assembly (100) further comprises a pedal (130), and the pedal (130) is fixedly connected to each of the front support rods (110).

9. The electric folding wheelchair according to claim 1, It is characterized in that The armrest assembly (500) includes an armrest support rod (510) and an armrest folding rod (520) which are arranged at an angle, wherein the first end of the armrest support rod (510) is hinged to the split support rod (310), and the second end of the armrest support rod (510) is hinged to the armrest folding rod (520), and each of the split support rods (310) is hinged to the armrest support rod (510); a first indexing pin is arranged between the armrest support rod (510) and the split support rod (310), and the first indexing pin is configured to fix the angle between the armrest support rod (510) and the split support rod (310); a second indexing pin is arranged between the armrest folding rod (520) and the armrest support rod (510), and the second indexing pin is configured to fix the angle between the armrest support rod (510) and the armrest folding rod (520).

10. The electric folding wheelchair according to claim 9, It is characterized in that The electric folding wheelchair further comprises a control assembly (800), wherein the control assembly (800) comprises a direction controller (810), a support frame (820), a cover plate (830) and a quick-release handle (840), wherein each of the armrest support rods (510) is provided with a fixing hole (511), the support frame (820) is provided with a boss (821) plug-fitting with the fixing hole (511) along a first direction, the cover plate (830) is used to be installed in the fixing hole (511) along a second direction, the second direction being opposite to the first direction, and the boss (821) is provided with a There is a connecting screw hole, the cover plate (830) is provided with a connecting through hole opposite to the connecting screw hole, the quick-release handle (840) is provided with an external thread, and the quick-release handle (840) passes through the connecting through hole and is screwed into the connecting screw hole; the direction controller (810) is fixedly arranged on the support frame (820), and the control component (800) is selectively installed on one of the multiple armrest support rods (510); and / or, the armrest component (500) also includes an armrest pad (530), and the armrest pad (530) is fixedly arranged on the top of the armrest folding rod (520).

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