WO2019148915A1 - 可折叠轮椅 - Google Patents

可折叠轮椅 Download PDF

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Publication number
WO2019148915A1
WO2019148915A1 PCT/CN2018/113648 CN2018113648W WO2019148915A1 WO 2019148915 A1 WO2019148915 A1 WO 2019148915A1 CN 2018113648 W CN2018113648 W CN 2018113648W WO 2019148915 A1 WO2019148915 A1 WO 2019148915A1
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WO
WIPO (PCT)
Prior art keywords
bracket
seat
rotating shaft
pedal
link
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Application number
PCT/CN2018/113648
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English (en)
French (fr)
Inventor
戴志荣
朱吴伟
Original Assignee
广州视源电子科技股份有限公司
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Application filed by 广州视源电子科技股份有限公司 filed Critical 广州视源电子科技股份有限公司
Publication of WO2019148915A1 publication Critical patent/WO2019148915A1/zh

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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61G—TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
    • A61G5/00—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs
    • A61G5/08—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs foldable

Definitions

  • the utility model relates to the technical field of wheelchairs, in particular to a foldable wheelchair.
  • the object of the present invention is to provide a wheelchair that has a relatively simple overall structure, which is relatively easy to operate, and can realize a foldable wheelchair that folds and unfolds the wheelchair in one key operation.
  • the present invention provides a foldable wheelchair comprising a seat front bracket, a seat rear bracket, a backrest bracket, a front wheel bracket and a rear wheel bracket; wherein, in the unfolded state, the seat front The bracket and the seat rear bracket are horizontally disposed, the front wheel bracket is substantially vertically disposed, the rear wheel bracket is inclined from the front to the rear, and the front end of the seat rear bracket passes the first rotating shaft and the seat a rear end of the front bracket is rotatably connected, and a rear end of the rear seat bracket is rotatably coupled to a middle portion of the back bracket through a second rotating shaft, and an upper end of the front wheel bracket passes through a third rotating shaft and the front bracket of the seat
  • the front end and the front end of the rear wheel bracket are simultaneously rotatably connected, and the rear end of the rear wheel bracket is rotatably connected to the lower end of the back bracket through a fourth rotating shaft; the seat front bracket and the seat rear bracket are applied by applying a force
  • the joint is
  • the armrest bracket further comprises an armrest, the first link and the second link, and the lower end of the first link is rotatably connected to the joint of the seat back bracket and the backrest bracket by the turning mechanism
  • the upper end of the first link is rotatably coupled to the rear end of the armrest, and the lower end of the second link is rotatably coupled to the front end of the seat rear bracket via a fifth rotating shaft, the second link
  • the upper end is rotatably connected to the front end of the armrest; the connection of the armrest, the first link, the second link and the seat rear bracket forms a quadrilateral structure.
  • the inverting mechanism includes a first gear and a second gear that mesh with each other, the first gear is sleeved on the second rotating shaft, and is fixedly connected with the backrest bracket, and the second gear passes
  • the sixth rotating shaft is rotatably coupled to the seat rear bracket, and the lower end of the second link is coupled to the sixth rotating shaft and moves synchronously with the second gear.
  • the pedal bracket further includes a pedal lower bracket, a pedal side bracket and a pedal upper bracket, wherein the pedal side bracket is inclined from top to bottom, and the upper end of the pedal side bracket passes through the seventh rotating shaft
  • the front end of the seat rear bracket is rotatably connected, and the lower end of the pedal side bracket is rotatably connected to the lower end of the front wheel bracket via an eighth rotating shaft, and the side of the upper end of the pedal lower bracket passes through the ninth rotating shaft and the front end
  • the lower end of the wheel bracket is rotatably connected, and the pedal upper bracket is a "T" shaped bracket, and opposite ends of the "T” shaped bracket are respectively rotatably connected with the middle portions of the two rear wheel brackets, the "T”
  • the lower end of the bracket is rotatably coupled to the middle of the upper end of the lower pedal bracket.
  • the method further includes a locking mechanism disposed on the seat front bracket, the locking mechanism includes a switch member and a locking actuator, the switch member has an upper locking position and an unlocking position, and the switching device is switched to the locking In the position, the locking actuator locks the pedal side bracket, and when the switching member is switched to the unlocking position, the locking actuator unlocks the pedal side bracket.
  • a locking mechanism disposed on the seat front bracket, the locking mechanism includes a switch member and a locking actuator, the switch member has an upper locking position and an unlocking position, and the switching device is switched to the locking In the position, the locking actuator locks the pedal side bracket, and when the switching member is switched to the unlocking position, the locking actuator unlocks the pedal side bracket.
  • the switch member further has a neutral position, the neutral position is provided with a neutral stroke, the switch member is free to move along the neutral stroke in the neutral position, and the switch member is switched to the neutral position
  • the locking actuator locks the pedal side bracket.
  • the front seat cushion and the rear seat cushion are detachably mounted on the upper end surface of the seat front bracket, and the rear seat cushion is detachably mounted on the upper end surface of the seat rear bracket.
  • the side faces of the front seat cushion and the rear seat cushion abut each other.
  • the rear end of the rear bracket of the seat is rotatably connected to the middle of the backrest bracket through the second rotating shaft
  • the upper end of the wheel bracket is synchronously connected with the front end of the front seat bracket and the front end of the rear wheel bracket through a third rotating shaft
  • the rear end of the rear wheel bracket is rotatably connected to the lower end of the back bracket through the fourth rotating shaft; Therefore, the human hand can be applied Force to make the joint between the seat front bracket and the seat rear bracket upward, so that the seat front bracket, the seat rear bracket, the back bracket, the front wheel bracket and the rear wheel bracket are synchronously folded together; Applying a force to level the joint between the front seat bracket and the rear seat bracket, so that the front seat bracket, the seat rear bracket, the back bracket, the front wheel bracket and the rear wheel bracket are synchronously deployed; the entire wheelchair is folded and unfolded
  • FIG. 1 is a schematic perspective view of a foldable wheelchair according to a preferred embodiment of the present invention.
  • FIG. 2 is a schematic view showing the overall frame structure of a foldable wheelchair according to a preferred embodiment of the present invention
  • FIG. 3 is a schematic view showing the connection of the first link of the foldable wheelchair and the connection between the seat rear bracket and the backrest bracket according to a preferred embodiment of the present invention
  • FIG. 4 is a bottom structural view of an overall frame structure of a foldable wheelchair according to a preferred embodiment of the present invention.
  • Figure 5 is a schematic view showing the unfolded state of the foldable wheelchair according to a preferred embodiment of the present invention.
  • FIG. 6 is a schematic view showing a half-folded state of a foldable wheelchair according to a preferred embodiment of the present invention.
  • Figure 7 is a schematic view showing the folded state of the foldable wheelchair in accordance with a preferred embodiment of the present invention.
  • the orientations such as “front”, “back”, “upper”, “lower”, etc., are in the user's orientation when the user is in a wheelchair in a normal posture. Defined.
  • a foldable wheelchair according to an embodiment of the present invention is schematically illustrated, which includes a seat front bracket 1, a seat rear bracket 2, a backrest bracket 3, a front wheel bracket 4, and a rear portion.
  • the wheel bracket 5 wherein, in the unfolded state, the seat front bracket 1 and the seat rear bracket 2 are horizontally disposed, the front wheel bracket 1 is substantially vertically disposed, and the rear wheel bracket 2 is inclined from the front to the rear;
  • the front end of the seat rear bracket 2 is rotatably connected to the rear end of the seat front bracket 1 through the first rotating shaft A, and the rear end of the seat rear bracket 2 is rotatably connected to the middle portion of the back bracket 3 through the second rotating shaft B.
  • the front wheel bracket 4 The upper end is rotatably connected to the front end of the front seat bracket 1 and the front end of the rear wheel bracket 5 through the third rotating shaft C, and the rear end of the rear wheel bracket 5 is rotatably connected to the lower end of the back bracket 3 through the fourth rotating shaft D;
  • the force can be applied by a human hand to arch the joint of the seat front bracket 1 and the seat rear bracket 2 upward, so that the rear wheel 51 is a support point, and the fourth rotating shaft D is a swing axis, and the seat front bracket 1 is The seat rear bracket 2, the backrest bracket, the front wheel bracket and the rear wheel bracket are synchronously folded together; similarly, a force can be applied by a human hand to level the joint between the seat front bracket 1 and the seat rear bracket 2,
  • the rear wheel 51 is a support point
  • the fourth rotating shaft D is a swing axis, and the seat front bracket 1, the seat rear bracket 2, the back support bracket 3, the front wheel bracket 4 and the rear wheel bracket 5 are synchronously launched;
  • the structural frame is relatively simple, and the process of folding and unfolding of the wheelchair requires only one-hand operation, and the operation is relatively easy.
  • the one-button operation can fold and unfold the wheelchair as a whole, thereby improving the human-machine experience of the wheelchair.
  • the foldable wheelchair of the embodiment of the present invention further includes an armrest bracket 6 , wherein the armrest bracket 6 includes an armrest 61 , a first link 62 and a second link 63 , and the first link 62
  • the lower end of the first link 62 is rotatably connected to the rear end of the armrest 61, and the lower end of the second link 63 passes through the fifth shaft E.
  • the upper end of the second link 63 is rotatably connected with the front end of the armrest 61; the connection of the armrest 61, the first link 62, the second link 63 and the seat rear bracket 2 forms a a quadrilateral structure; the seat rear bracket 2 is folded backwards around the second rotating shaft B during the folding of the wheelchair, the seat rear bracket 2 synchronously pushes the second link 63, and the turning mechanism 64 synchronously drives the first link The 62 swings rearward so that the armrest bracket 6 is folded back integrally as a whole.
  • the inverting mechanism 64 includes a first gear 641 and a second gear 642 that mesh with each other.
  • the first gear 641 is sleeved on the second rotating shaft B, and is fixedly connected with the backrest bracket 3, and the second gear 642 passes through
  • the six-axis F is rotatably coupled to the seat rear bracket 2, and the lower end of the second link 63 is coupled to the sixth shaft F and moves synchronously with the second gear 642; the first gear 641 is meshed with the second gear 642.
  • the foldable wheelchair of the embodiment of the present invention further includes a pedal bracket 7 including a pedal lower bracket 71 in a "U" shape, a pedal side bracket 72 and a pedal upper bracket 73, wherein In the unfolded state, the pedal side bracket 72 is inclined from top to bottom, and the upper end of the pedal side bracket 72 is rotationally coupled to the front end of the seat rear bracket 2 via the seventh rotating shaft G, and the lower end of the pedal side bracket 72 passes through the eighth rotating shaft H and the front.
  • the lower end of the wheel bracket 4 is rotatably connected, and the side of the upper end of the lower pedal bracket 71 is rotatably connected to the lower end of the front wheel bracket 4 through the ninth shaft I.
  • the front wheel 41 is mounted on the lower end of the front wheel bracket 4, and the upper bracket 73 is "T.
  • the opposite ends of the "T" shaped bracket are respectively rotatably connected with the middle portions of the two rear wheel brackets 5, and the lower end of the "T” shaped bracket is rotatably connected with the middle of the upper end of the lower pedal bracket 71;
  • the bracket 1 and the seat rear bracket 2 are upturned and folded upward, the front end of the seat rear bracket 2 pulls the pedal side bracket 72 to reverse, and the pedal side bracket 72 pulls the front wheel bracket 4 to fold backward and backward, and the pedal lower bracket 71 around the first I shaft turned upwards, so that the pedal bracket implemented in conjunction 7 folded away function.
  • the foldable wheelchair of the embodiment of the present invention further includes a locking mechanism 8 disposed on the front seat bracket 1 , the locking mechanism 8 includes a switch member 81 and a locking actuator 82 , wherein the switch member 81 has a locking position and an unlocking position.
  • the switch member 81 has a locking position and an unlocking position.
  • the locking actuator 82 locks the pedal side bracket 72.
  • the entire wheelchair frame is locked and cannot be folded or unfolded.
  • the lock actuator 82 unlocks the pedal side bracket 72, and at this time, the wheelchair can be folded by the handle of the single pull switch member 81.
  • the switch member 81 further has a neutral position, the neutral position is provided with a neutral stroke, the switch member 81 can freely move along the neutral stroke in the neutral position, and when the switch member 81 is switched to the neutral position, the lock actuator 82 will be the pedal side bracket. 72 is locked. At this time, the frame of the entire wheelchair is locked and cannot be folded or unfolded.
  • the purpose of setting the neutral position is to carry or drag the wheelchair through the handle when the wheelchair is folded, and there is a section due to the neutral position.
  • the neutral stroke does not trigger the locking actuator 82 to unlock the pedal side bracket 72 during the swinging of the handle, thereby improving the convenience of carrying or dragging the wheelchair.
  • the foldable wheelchair of the embodiment of the present invention further includes a front seat cushion 9 and a rear seat cushion 10, the front seat cushion 9 is detachably mounted on the upper end surface of the seat front bracket 1, and the rear seat cushion 10 is detachably mounted behind the seat.
  • the side faces of the front seat cushion 9 and the rear seat cushion 10 abut each other; and the switch member 81 is located in the gap formed by the front seat cushion 9 and the rear seat cushion 10, and the switch member 81 is easily operated by a human hand.
  • the foldable wheelchair of the embodiment of the present invention further includes a back tilt bracket 30 and a battery 20, wherein the back tilt bracket 30 is connected to the bottom of the back bracket 3, and the anti-back tilt bracket 30 is provided with an anti-back tilt wheel at the end of the back tilt bracket 30. 301, the battery 20 is mounted on the anti-back tilt bracket 30.
  • the folding process of the foldable wheelchair of the embodiment of the present invention is as follows: the operator generally stands on the side of the rear of the wheelchair, one hand holds the upper part of the backrest bracket 3, and the other hand holds
  • the handle 811 of the switch member 81 is moved, the rotary handle 811 switches the switch member 81 to the unlock position, the lock actuator 82 unlocks the pedal side bracket 72, and then the rear wheel 51 lifts the handle 811 as a support point, and the overall frame of the wheelchair is pressed
  • the direction of the arrow K swings around the axis of the rear wheel 51, the folding starts gradually; as shown in FIG. 7, when the wheelchair is folded into position, the anti-back roll 301 and the rear wheel 51 are substantially in the same horizontal plane, and the folded wheelchair at this time.
  • the upright posture can be maintained under the support of the anti-tip wheel 301 and the rear wheel 51 to facilitate the placement and storage of the wheelchair; in addition, when the wheelchair is folded into position, the switch member 81 can be switched to the neutral position, and then the passage can be passed.
  • the handle 811 is pulled or towed by a wheelchair to facilitate the movement and handling of the wheelchair.

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  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Seats For Vehicles (AREA)
  • Chairs For Special Purposes, Such As Reclining Chairs (AREA)

Abstract

一种可折叠轮椅，包括座椅前支架、座椅后支架、靠背支架、前轮支架及后轮支架；在展开状态下，座椅前支架及座椅后支架均水平设置，前轮支架呈竖直设置，后轮支架由前向后倾斜设置；座椅后支架的前端通过第一转轴与座椅前支架的后端转动连接，座椅后支架的后端通过第二转轴与靠背支架的中部转动连接，前轮支架的上端通过第三转轴与座椅前支架的前端及后轮支架的前端同时转动连接，后轮支架的后端通过第四转轴与靠背支架的下端转动连接；通过施加作用力，使座椅前支架与座椅后支架的连接处向上拱起，使得轮椅折叠。

Description

可折叠轮椅 技术领域
本实用新型涉及轮椅技术领域，具体涉及一种可折叠轮椅。
背景技术
现有的轮椅虽然也可以折叠，但是不同的轮椅折叠的方式也不一样，采用不同的折叠方式，可能会导致轮椅的整个结构复杂程度及折叠操作的难易程度也不尽相同；现有的可折叠轮椅，大多结构都比较复杂，并且折叠的操作难度也比较大，难以做到一键操作便将轮椅整体折叠和展开的效果。
实用新型内容
本实用新型的目的是提供一种轮椅的整体结构较为简单，这得操作比较容易，并能实现一键操作将轮椅整体折叠和展开的可折叠轮椅。
为了解决上述问题，本实用新型提供了一种可折叠轮椅，包括座椅前支架、座椅后支架、靠背支架、前轮支架及后轮支架；其中，在展开状态下，所述座椅前支架及座椅后支架均水平设置，所述前轮支架基本呈竖直设置，所述后轮支架由前向后倾斜设置；所述座椅后支架的前端通过第一转轴与所述座椅前支架的后端转动连接，所述座椅后支架的后端通过第二转轴与所述靠背支架的中部转动连接，所述前轮支架的上端通过第三转轴与所述座椅前支架的前端及后轮支架的前端同时转动连接，所述后轮支架的后端通过第四转轴与所述靠背支架的下端转动连接；通过施加作用力，使所述座椅前支架与座椅后支架的连接处向上拱起，使得所述座椅前支架、座椅后支架、靠背支架、前轮支架及后轮支架折叠在一起。
作为优选方案，还包括扶手支架，所述扶手支架包括扶手、第一连杆及第二连杆，所述第一连杆的下端通过翻转机构转动连接在座椅 后支架与靠背支架的连接处，所述第一连杆的上端与所述扶手的后端转动连接，所述第二连杆的下端通过第五转轴与所述座椅后支架的前端转动连接，所述第二连杆的上端通过与所述扶手的前端转动连接；所述扶手、第一连杆、第二连杆及座椅后支架的连接形成一个四边形结构。
作为优选方案，所述翻转机构包括相互啮合的第一齿轮及第二齿轮，所述第一齿轮套接在所述第二转轴上，且与所述靠背支架固定连接，所述第二齿轮通过第六转轴转动连接在所述座椅后支架上，所述第二连杆的下端连接在所述第六转轴上，且与所述第二齿轮同步运动。
作为优选方案，还包括踏板支架，所述踏板支架包括踏板下支架、踏板侧支架及踏板上支架，所述踏板侧支架由上至下地倾斜设置，所述踏板侧支架的上端通过第七转轴与所述座椅后支架的前端转动连接，所述踏板侧支架的下端通过第八转轴与所述前轮支架的下端转动连接，所述踏板下支架的上端的侧面通过第九转轴与所述前轮支架的下端转动连接，所述踏板上支架为“T”形支架，所述“T”形支架的相对的两端分别与两个所述后轮支架的中部转动连接，所述“T”形支架的下端与所述踏板下支架的上端的中部转动连接。
作为优选方案，还包括设置在所述座椅前支架上的锁定机构，所述锁定机构包括开关件及锁定执行件，所述开关件具有上锁位及解锁位，所述开关件切换至上锁位时，所述锁定执行件将所述踏板侧支架锁死，所述开关件切换至解锁位时，所述锁定执行件将所述踏板侧支架解锁。
作为优选方案，所述开关件还具有空挡位，所述空挡位设有一段空挡行程，所述开关件能够在所述空挡位上沿空挡行程自由运动，所述开关件切换至所述空挡位时，所述锁定执行件将所述踏板侧支架锁死。
作为优选方案，还包括前坐垫和后坐垫，所述前坐垫拆卸地安装 在所述座椅前支架的上端面上，所述后坐垫可拆卸地安装在于所述座椅后支架的上端面上，所述前坐垫和所述后坐垫相邻的侧面相互贴靠。
本实用新型的可折叠轮椅，由于座椅后支架的前端通过第一转轴与座椅前支架的后端转动连接，座椅后支架的后端通过第二转轴与靠背支架的中部转动连接，前轮支架的上端通过第三转轴与座椅前支架的前端及后轮支架的前端同时转动连接，后轮支架的后端通过第四转轴与靠背支架的下端转动连接；因此，可以通过人手施加作用力以使座椅前支架与座椅后支架的连接处向上拱起，使得座椅前支架、座椅后支架、靠背支架、前轮支架及后轮支架同步联动折叠在一起；同样可以通过人手施加作用力以使座椅前支架与座椅后支架的连接处摊平，使得椅前支架、座椅后支架、靠背支架、前轮支架及后轮支架同步联动展开；整个轮椅折叠和展开的过程只需要单手操作，操作比较容易，实现了一键操作便可将轮椅整体折叠和展开，提高了轮椅的人机体验度。
附图说明
图1是本实用新型一优选实施例的可折叠轮椅的立体结构示意图；
图2是本实用新型一优选实施例的可折叠轮椅的整体框架结构的示意图；
图3是本实用新型一优选实施例的可折叠轮椅的第一连杆和座椅后支架与靠背支架的连接处的连接示意图；
图4是本实用新型一优选实施例的可折叠轮椅的整体框架结构的底部结构示意图；
图5是本实用新型一优选实施例的可折叠轮椅的展开状态示意图；
图6是本实用新型一优选实施例的可折叠轮椅的半折叠状态示意图；
图7是本实用新型一优选实施例的可折叠轮椅的折叠状态示意图。
其中，1、座椅前支架；2、座椅后支架；3、靠背支架；4、前轮 支架；41、前轮；5、后轮支架；51、后轮；6、扶手支架；61、扶手；62、第一连杆；63、第二连杆；64、翻转机构；641、第一齿轮；642、第二齿轮；7、踏板支架；71、踏板下支架；72、踏板侧支架；73、踏板上支架；8、锁定机构；81、开关件；811、把手；82、锁定执行件；9、前坐垫；10、后坐垫；20、电池；30、防后倾支架；301、防后倾轮；A、第一转轴；B、第二转轴；C、第三转轴；D、第四转轴；E、第五转轴；F、第六转轴；G、第七转轴；H、第八转轴；I、第九转轴。
具体实施方式
下面结合附图和实施例，对本实用新型的具体实施方式作进一步详细描述。以下实施例用于说明本实用新型，但不用来限制本实用新型的范围。
本实用新型实施例中，涉及到的方位，例如“前”、“后”、“上”、“下”等，均以使用者以正常的姿势坐在轮椅上时，以使用者的方位来定义的。
结合图1至图7所示，示意性地显示了本实用新型实施例的一种可折叠轮椅，其包括座椅前支架1、座椅后支架2、靠背支架3、前轮支架4及后轮支架5；其中，在展开状态下，座椅前支架1及座椅后支架2均水平设置，前轮支架1基本呈竖直设置，后轮支架2由前向后倾斜设置；
座椅后支架2的前端通过第一转轴A与座椅前支架1的后端转动连接，座椅后支架2的后端通过第二转轴B与靠背支架3的中部转动连接，前轮支架4的上端通过第三转轴C与座椅前支架1的前端及后轮支架5的前端同时转动连接，后轮支架5的后端通过第四转轴D与靠背支架3的下端转动连接；
可以通过人手施加作用力以使座椅前支架1与座椅后支架2的连接处向上拱起，使得以后轮51为支撑点，以第四转轴D为摆动轴线， 将座椅前支架1、座椅后支架2、靠背支架、前轮支架及后轮支架同步联动折叠在一起；同样地，可以通过人手施加作用力以使座椅前支架1与座椅后支架2的连接处摊平，使得以后轮51为支撑点，以第四转轴D为摆动轴线，将座椅前支架1、座椅后支架2、靠背支架3、前轮支架4及后轮支架5同步联动展开；整个轮椅的结构框架较为简单，并且轮椅折叠和展开的过程只需要单手操作，操作比较容易，实现了一键操作便可将轮椅整体折叠和展开，提高了轮椅的人机体验度。
结合图1至图3所示，本实用新型实施例的可折叠轮椅还包括扶手支架6，其中，扶手支架6包括扶手61、第一连杆62及第二连杆63，第一连杆62的下端通过翻转机构64转动连接在座椅后支架2与靠背支架3的连接处，第一连杆62的上端与扶手61的后端转动连接，第二连杆63的下端通过第五转轴E与座椅后支架2的前端转动连接，第二连杆63的上端与扶手61的前端转动连接；扶手61、第一连杆62、第二连杆63及座椅后支架2的连接形成一个四边形结构；在轮椅折叠的过程中座椅后支架2绕着第二转轴B向后翻转折叠，座椅后支架2同步地推动第二连杆63，翻转机构64则同步地驱动第一连杆62向后摆动，使得扶手支架6整体地向后翻转折叠。
如图3所示，翻转机构64包括相互啮合的第一齿轮641及第二齿轮642，第一齿轮641套接在第二转轴B上，且与靠背支架3固定连接，第二齿轮642通过第六转轴F转动连接在座椅后支架2上，第二连杆63的下端连接在第六转轴F上，且与第二齿轮642同步运动；第一齿轮641与第二齿轮642的啮合传动，类似于行星齿轮结构的传动原理，其中，第一齿轮641相当于太阳轮，第二齿轮642相当于行星轮，当座椅后支架2绕着第二转轴B向后翻转折叠时，第一齿轮641固定不动，第二齿轮642在绕着第一齿轮641公转的同时，绕着第八转轴H的轴线自转，由于第二连杆63的下端连接在第六转轴F上，第二齿轮642自转同步地带动第二连杆63绕着第六转轴F的轴 线向后摆动，使得扶手支架6整体地向后翻转实现折叠。
请参照图4所示，本实用新型实施例的可折叠轮椅还包括踏板支架7，踏板支架7包括呈“U”形的踏板下支架71、踏板侧支架72及踏板上支架73，其中，在展开状态下，踏板侧支架72由上至下地倾斜设置，踏板侧支架72的上端通过第七转轴G与座椅后支架2的前端转动连接，踏板侧支架72的下端通过第八转轴H与前轮支架4的下端转动连接，踏板下支架71的上端的侧面通过第九转轴I与前轮支架4的下端转动连接，前轮支架4的下端安装有前轮41，踏板上支架73为“T”形支架，“T”形支架的相对的两端分别与两个后轮支架5的中部转动连接，“T”形支架的下端与踏板下支架71的上端的中部转动连接；当座椅前支架1及座椅后支架2向上拱起翻转折叠时，座椅后支架2的前端拉动踏板侧支架72翻转的同时，使踏板侧支架72拉动前轮支架4向后翻转折叠，同时踏板下支架71绕着第九转轴I向上翻转，从而联动地实现将踏板支架7折叠收起的功能。
请继续参照图4所示，本实用新型实施例的可折叠轮椅还包括设置在座椅前支架1上的锁定机构8，该锁定机构8包括开关件81及锁定执行件82，其中，开关件81具有上锁位及解锁位，开关件81切换至上锁位时，锁定执行件82将踏板侧支架72锁死，此时，整个轮椅的框架被锁死，无法被折叠或展开，当开关件81切换至解锁位时，锁定执行件82将踏板侧支架72解锁，此时，可以通过单手提拉开关件81的把手，将轮椅折叠。
作为优选，开关件81还具有空挡位，空挡位设有一段空挡行程，开关件81能够在空挡位上沿空挡行程自由运动，开关件81切换至空挡位时，锁定执行件82将踏板侧支架72锁死，此时，整个轮椅的框架被锁死，无法被折叠或展开；设置空挡位的目的是，当轮椅折叠后，可以通过把手来搬运或拖动轮椅，而由于空挡位设有一段空挡行程，在把手摆动的过程中，不会触发锁定执行件82将踏板侧支架72解锁， 提高了轮椅搬运或拖动的便捷性。
作为优选，本实用新型实施例的可折叠轮椅还包括前坐垫9和后坐垫10，前坐垫9拆卸地安装在座椅前支架1的上端面上，后坐垫10可拆卸地安装在于座椅后支架2的上端面上，前坐垫9和后坐垫10相邻的侧面相互贴靠；而开关件81恰好位于在前坐垫9和后坐垫10形成的缝隙内，以人手便于操作开关件81。
此外，本实用新型实施例的可折叠轮椅还包防后倾支架30及电池20，其中防后倾支架30连接在靠背支架3的底部，防后倾支架30的端部设有防后倾轮301，电池20则安装在防后倾支架30上。
结合图5至图7所示，本实用新型实施例的可折叠轮椅的折叠过程如下：操作人员一般站在轮椅的后方的侧面，一只手扶住靠背支架3的上部，另一只手握住开关件81的把手811，旋转把手811将开关件81切换至解锁位，使锁定执行件82将踏板侧支架72解锁，然后以后轮51作为支撑点提拉把手811，轮椅的整体框架将按箭头K方向绕着后轮51轴线摆动的同时，开始逐渐折叠；如图7所示，当轮椅折叠到位后，防后倾轮301与后轮51基本在同一水平面内，此时折叠后的轮椅可以在防后倾轮301与后轮51支撑下保持直立姿势，以方便轮椅的摆放和存储；此外，当轮椅折叠到位后，可以将开关件81切换至空挡位，此时，便可以通过把手811提拉或拖行轮椅，以便于轮椅的移动和搬运。
以上所述仅是本实用新型的优选实施方式，应当指出，对于本技术领域的普通技术人员来说，在不脱离本实用新型技术原理的前提下，还可以做出若干改进和替换，这些改进和替换也应视为本实用新型的保护范围。

Claims (7)

  1. 一种可折叠轮椅，其特征在于，包括座椅前支架、座椅后支架、靠背支架、前轮支架及后轮支架；
    其中，在展开状态下，所述座椅前支架及座椅后支架均水平设置，所述前轮支架基本呈竖直设置，所述后轮支架由前向后倾斜设置；
    所述座椅后支架的前端通过第一转轴与所述座椅前支架的后端转动连接，所述座椅后支架的后端通过第二转轴与所述靠背支架的中部转动连接，所述前轮支架的上端通过第三转轴与所述座椅前支架的前端及后轮支架的前端同时转动连接，所述后轮支架的后端通过第四转轴与所述靠背支架的下端转动连接；
    通过施加作用力，使所述座椅前支架与座椅后支架的连接处向上拱起，使得所述座椅前支架、座椅后支架、靠背支架、前轮支架及后轮支架折叠在一起。
  2. 根据权利要求1所述的可折叠轮椅，其特征在于，还包括扶手支架，所述扶手支架包括扶手、第一连杆及第二连杆，所述第一连杆的下端通过翻转机构转动连接在座椅后支架与靠背支架的连接处，所述第一连杆的上端与所述扶手的后端转动连接，所述第二连杆的下端通过第五转轴与所述座椅后支架的前端转动连接，所述第二连杆的上端与所述扶手的前端转动连接；所述扶手、第一连杆、第二连杆及座椅后支架的连接形成一个四边形结构。
  3. 根据权利要求2所述的可折叠轮椅，其特征在于，所述翻转机构包括相互啮合的第一齿轮及第二齿轮，所述第一齿轮套接在所述第二转轴上，且与所述靠背支架固定连接，所述第二齿轮通过第六转轴转动连接在所述座椅后支架上，所述第二连杆的下端连接在所述第六转轴上，且与所述第二齿轮同步运动。
  4. 根据权利要求1所述的可折叠轮椅，其特征在于，还包括踏板支架，所述踏板支架包括踏板下支架、踏板侧支架及踏板上支架，所述踏板侧支架由上至下地倾斜设置，所述踏板侧支架的上端通过第七转轴与所述座椅后支架的前端转动连接，所述踏板侧支架的下端通过第八转轴与所述前轮支架的下端转动连接，所述踏板下支架的上端的侧面通过第九转轴与所述前轮支架的下端转动连接，所述踏板上支架为“T”形支架，所述“T”形支架的相对的两端分别与两个所述后轮支架的中部转动连接，所述“T”形支架的下端与所述踏板下支架的上端的中部转动连接。
  5. 根据权利要求4所述的可折叠轮椅，其特征在于，还包括设置在所述座椅前支架上的锁定机构，所述锁定机构包括开关件及锁定执行件，所述开关件具有上锁位及解锁位，所述开关件切换至上锁位时，所述锁定执行件将所述踏板侧支架锁死，所述开关件切换至解锁位时，所述锁定执行件将所述踏板侧支架解锁。
  6. 根据权利要求5所述的可折叠轮椅，其特征在于，所述开关件还具有空挡位，所述空挡位设有一段空挡行程，所述开关件能够在所述空挡位上沿空挡行程自由运动，所述开关件切换至所述空挡位时，所述锁定执行件将所述踏板侧支架锁死。
  7. 根据权利要求1所述的可折叠轮椅，其特征在于，还包括前坐垫和后坐垫，所述前坐垫拆卸地安装在所述座椅前支架的上端面上，所述后坐垫可拆卸地安装在于所述座椅后支架的上端面上，所述前坐垫和所述后坐垫相邻的侧面相互贴靠。
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