WO2021244068A1 - 一种可折叠轮椅 - Google Patents

一种可折叠轮椅 Download PDF

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Publication number
WO2021244068A1
WO2021244068A1 PCT/CN2021/077350 CN2021077350W WO2021244068A1 WO 2021244068 A1 WO2021244068 A1 WO 2021244068A1 CN 2021077350 W CN2021077350 W CN 2021077350W WO 2021244068 A1 WO2021244068 A1 WO 2021244068A1
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WO
WIPO (PCT)
Prior art keywords
bracket
rear wheel
front wheel
rotatably connected
armrest
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PCT/CN2021/077350
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English (en)
French (fr)
Inventor
吴焘
陈向阳
张华东
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浙江爱司米电气有限公司
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Application filed by 浙江爱司米电气有限公司 filed Critical 浙江爱司米电气有限公司
Publication of WO2021244068A1 publication Critical patent/WO2021244068A1/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
    • A61G5/0808—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs foldable characterised by a particular folding direction
    • A61G5/0833—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs foldable characterised by a particular folding direction folding front to back, e.g. reducing or expanding the overall depth of the wheelchair
    • 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
    • A61G5/10—Parts, details or accessories

Definitions

  • the invention belongs to the field of medical equipment, and specifically relates to a foldable wheelchair.
  • wheelchairs are usually used instead of walking, which can enable patients to receive better treatment and recovery and facilitate their daily lives.
  • the purpose of the present invention is to overcome the shortcomings of the prior art and provide a foldable wheelchair with simple structure and convenient operation.
  • a foldable wheelchair includes a wheelchair frame having an unfolded state and a folded state, and the wheelchair frame includes:
  • a front wheel bracket, a front wheel assembly is provided at the bottom front of the front wheel bracket, and the front wheel assembly includes a rotatable front wheel;
  • a rear wheel bracket, the bottom rear of the rear wheel bracket is provided with a rear wheel assembly, the rear wheel assembly includes a rotatable rear wheel, the upper end of the rear wheel bracket and the upper end of the front wheel bracket pass through the first A rotating shaft is connected;
  • a seat bracket, the front part of the seat bracket and the front wheel bracket are rotatably connected by a second rotating shaft;
  • a backrest bracket, the lower end of the backrest bracket and the rear end of the seat bracket are rotatably connected by a third rotating shaft;
  • the front end of the armrest bracket is rotatably connected to the upper end of the front wheel bracket and/or the upper end of the rear wheel bracket, and the rear end of the armrest bracket and the backrest bracket pass through Four rotating shafts rotating connection;
  • the front wheel support, the seat support, the backrest support, and the armrest support constitute a four-bar linkage mechanism
  • the foldable wheelchair also includes:
  • a connecting piece one end of the connecting piece is rotatably connected to the four-bar linkage mechanism, and the other end of the connecting piece is rotatably connected to the rear wheel bracket;
  • the locking mechanism is used to lock the wheelchair frame in the unfolded state.
  • the front end of the armrest bracket is rotatably connected to the upper end of the front wheel bracket and the upper end of the rear wheel bracket through the first rotating shaft, the front wheel bracket, the seat bracket,
  • the backrest bracket and the armrest bracket form a four-bar linkage mechanism through the first rotating shaft, the second rotating shaft, the third rotating shaft, and the fourth rotating shaft.
  • one end of the connecting member is rotatably connected to the third shaft.
  • the locking mechanism is used for locking the relative positions of any two adjacent brackets among the front wheel bracket, the seat bracket, the backrest bracket and the armrest bracket; or, the locking mechanism is used for For locking the relative position of any one of the first rotating shaft, the second rotating shaft, the third rotating shaft, and the fourth rotating shaft with the other rotating shafts.
  • the locking mechanism is used to lock the relative position of the connecting member and the rear wheel bracket.
  • the locking mechanism includes a locking block movably provided on the connecting piece, a locking hole provided on the rear wheel bracket, and when the locking mechanism is in a locked state, the locking block is inserted In the locking hole, the relative position of the connecting member and the rear wheel bracket is locked; when the locking mechanism is in an unlocked state, the locking block is separated from the locking hole.
  • the moving direction of the locking block is perpendicular to the rotation plane of the connecting piece.
  • the connecting piece is provided with a mounting groove for accommodating the locking block, the locking block is movably arranged in the mounting groove, and the mounting groove is provided with a mounting groove for pushing the locking block An elastic piece inserted into the locking hole.
  • the elastic member is a compression spring.
  • the foldable wheelchair further includes an armrest, the thickness of the armrest is rotatably connected to the backrest bracket.
  • the foldable wheelchair further includes a limiting device for limiting the angle between the armrest and the backrest bracket when the wheelchair frame is in the unfolded state.
  • the armrest is rotatably connected to the backrest bracket through the fourth rotating shaft.
  • the wheelchair frame further includes a footrest connection frame, the footrest connection frame is arranged at the front of the front wheel support, and the plane on which the footrest connection frame is located and the front wheel support The planes are coincident with each other.
  • the foldable wheelchair further includes a footrest bracket, and the footrest bracket is rotatably arranged at the front end of the footrest connecting frame.
  • a foldable wheelchair includes a wheelchair frame having an unfolded state and a folded state, characterized in that: the wheelchair frame includes:
  • a front wheel bracket, a front wheel assembly is provided at the bottom front of the front wheel bracket, and the front wheel assembly includes a rotatable front wheel;
  • a rear wheel bracket, the bottom rear of the rear wheel bracket is provided with a rear wheel assembly, the rear wheel assembly includes a rotatable rear wheel, the upper end of the rear wheel bracket and the upper end of the front wheel bracket pass through the first A rotating shaft is connected;
  • a seat bracket, the front part of the seat bracket and the front wheel bracket are rotatably connected by a second rotating shaft;
  • a backrest bracket, the lower end of the backrest bracket and the rear end of the seat bracket are rotatably connected by a third rotating shaft;
  • the front end of the armrest bracket is rotatably connected to the upper end of the front wheel bracket and/or the upper end of the rear wheel bracket, and the rear end of the armrest bracket and the backrest bracket pass through Four rotating shafts rotating connection;
  • the front wheel support, the seat support, the backrest support, and the armrest support constitute a four-bar linkage mechanism
  • the foldable wheelchair also includes:
  • a connecting piece, one end of the connecting piece is rotatably connected to the four-bar linkage mechanism, and the other end of the connecting piece is rotatably connected to the rear wheel bracket.
  • the foldable wheelchair further includes:
  • the locking mechanism is used to lock the wheelchair frame in the unfolded state.
  • the locking mechanism is used to lock the relative position of the connecting member and the rear wheel bracket.
  • the locking mechanism is provided on the connecting piece and the rear wheel bracket.
  • one end of the connecting member is rotatably connected to the third shaft.
  • the front end of the armrest bracket is rotatably connected to the upper end of the front wheel bracket and the upper end of the rear wheel bracket through the first rotating shaft.
  • the present invention has the following advantages compared with the prior art:
  • the foldable wheelchair provided by the present invention includes a front wheel bracket, a rear wheel bracket, a seat bracket, a backrest bracket, and an armrest bracket.
  • the front end of the armrest bracket is rotatably connected to the upper end of the front wheel bracket and/or the rear wheel
  • the upper end of the bracket is connected to the seat bracket and the front wheel bracket through the second rotation axis
  • the backrest bracket and the seat bracket are connected through the third rotation axis
  • the rear end of the armrest bracket and the backrest bracket are connected through the fourth rotation axis to make the front wheel bracket
  • the seat bracket, the backrest bracket, and the armrest bracket form a four-bar linkage mechanism.
  • the four-bar linkage mechanism By rotating the two ends of the connector to the four-bar linkage mechanism and the rear wheel bracket, the four-bar linkage mechanism can be driven by the rotation of the connector.
  • the wheelchair frame is changed between the unfolded state and the folded state, so that the unfolding and folding of the foldable wheelchair is realized, and the structure is simple and the operation is convenient.
  • Fig. 1 is a perspective view of a foldable wheelchair according to an embodiment of the present invention.
  • Fig. 2 is a three-dimensional schematic diagram of a foldable wheelchair according to an embodiment of the present invention from another perspective.
  • Fig. 3 is a schematic side view of a foldable wheelchair according to an embodiment of the present invention. At this time, the wheelchair frame is in an unfolded state.
  • Fig. 4 is a schematic side view of a foldable wheelchair according to an embodiment of the present invention. At this time, the wheelchair frame is in the process of changing from an unfolded state to a folded state.
  • Fig. 5 is a schematic side view of a foldable wheelchair according to an embodiment of the present invention. At this time, the wheelchair frame is in a folded state.
  • Fig. 6 is a partial enlarged view of A in Fig. 2.
  • the front and rear directions, left and right directions, and up and down directions described in the present invention are based on the front and back directions, left and right directions, and up and down directions observed by the occupant when riding the foldable wheelchair provided by the present invention (that is, the wheelchair frame is in the unfolded state).
  • this embodiment provides a foldable wheelchair, which includes a wheelchair frame 10 having an unfolded state and a folded state.
  • the wheelchair frame 10 includes side brackets located on the left and right sides, and each side bracket includes: a front wheel bracket 100, a rear wheel bracket 200, a seat bracket 300, a backrest bracket 400, and an armrest bracket 500.
  • the front wheel support 100 extends upward obliquely from front to back.
  • the bottom front of the front wheel support 100 is provided with a front wheel assembly 101.
  • the front wheel assembly 101 includes a rotatable front wheel 1011; the rear wheel support 200 moves from back to front. Extending obliquely upwards, a rear wheel assembly 201 is provided at the bottom rear of the rear wheel bracket 200.
  • the rear wheel assembly 201 includes a rotatable rear wheel 2011.
  • the upper end of the rear wheel bracket 200 and the upper end of the front wheel bracket 100 pass through the first
  • the rotating shaft 11 is rotatably connected;
  • the seat support 300 is used to carry the occupant’s buttocks, the seat support 300 is provided with a seat plate or a seat cover, and the front part of the seat support 300 and the upper middle part of the front wheel support 100 pass through the second shaft 12
  • the upper middle part refers to a position slightly higher than the middle part of the front wheel bracket 100;
  • the backrest bracket 400 is used to support the back of the occupant, and the lower end of the backrest bracket 400 and the rear end of the seat bracket 300 pass through the third
  • the rotating shaft 13 is rotatably connected, the backrest bracket 400 is equipped with a backrest plate or sleeved with a backrest cover;
  • the front end of the armrest bracket 500 is rotatably connected to the first rotating shaft 11, and the rear end of the armrest
  • the front wheel support 100, the seat support 300, the back support 400 and the armrest support 500 on each side form a four-bar linkage mechanism through the first rotation shaft 11, the second rotation shaft 12, the third rotation shaft 13, and the fourth rotation shaft 14, respectively.
  • a connecting rod is fixedly connected between the front wheel supports 100 on both sides, and a pedal connecting frame 600 is provided on the connecting rod, which extends forward and downward.
  • the foldable wheelchair further includes a connecting piece 20 and a locking mechanism 30.
  • one end of the connecting member 20 is rotatably connected to the four-bar linkage mechanism.
  • one end of the connecting member 20 is rotatably connected to the third rotating shaft 13, that is, one end of the connecting member 20, the rear end of the seat bracket 300, and the lower end of the backrest bracket 400 are rotated by the third rotating shaft 13.
  • Connection; the other end of the connecting piece 20 is rotatably connected to the rear wheel bracket 200, for example, connected by a pivot.
  • FIG. 3 when the wheelchair frame 10 is in the unfolded state, the connecting member 20 is located inside the rear wheel bracket 200 and outside the seat bracket 300. When viewed from the side, the connecting member 20 is blocked by the rear wheel bracket 200.
  • the locking mechanism 30 is used to lock the wheelchair frame 10 in the unfolded state, and the locking mechanism is used to lock any two adjacent brackets among the front wheel bracket, the seat bracket, the backrest bracket, and the armrest bracket. Relative position locking; or, the locking mechanism is used to lock the relative position of any one of the first rotating shaft, the second rotating shaft, the third rotating shaft, and the fourth rotating shaft with other rotating shafts.
  • the locking mechanism 30 locks the wheelchair frame 10 in the unfolded state by locking the relative position of the connecting member 20 and the rear wheel support 200.
  • the locking mechanism 30 includes a locking block 31 and a locking hole 32.
  • the locking block 31 is movably arranged on the connecting piece 20. The moving direction of the locking block 31 is perpendicular to the rotation plane of the connecting piece 20.
  • the locking hole 32 is arranged on the rear wheel bracket 200.
  • the locking block 31 is inserted into the locking hole 32 to keep the relative position of the connecting member 20 and the rear wheel bracket 200 locked.
  • the locking mechanism 30 is in the unlocked state, the locking block 31 is out of the locking hole 32 ,
  • the connecting member 20 can rotate relative to the rear wheel bracket 200.
  • the connecting member 20 is provided with a mounting groove for accommodating the locking block 31, the locking block 31 is movably arranged in the mounting groove, and the mounting groove is also provided with an elastic member for pushing the locking block 31 into the locking hole 32 .
  • the elastic member is specifically a compression spring installed between the bottom of the mounting groove and the locking block 31.
  • the locking mechanism When the locking mechanism is in the unlocked state, as the wheelchair frame is expanded, the locking block 31 moves to the locking hole 32, the compression spring is reset, and then the locking block 31 is pushed into the locking hole 32 to automatically lock the wheelchair frame 10 in the expanded state.
  • unlocking applying external force to the connecting piece 20 or the rear wheel bracket 200 causes the two to have a tendency to rotate relative to each other.
  • the external force of the rear wheel bracket 200 (the external force should be large enough) retracts into the installation groove.
  • the foldable wheelchair further includes an armrest 40, a limiting device and a footrest bracket 50.
  • the armrest 40 is rotatably arranged on the backrest bracket 400.
  • the rear end of the armrest 40 is rotatably arranged on the fourth rotating shaft 14, wherein the armrest 40, the armrest bracket 500, and the backrest bracket 400 on each side extend from outside to ⁇ Settings.
  • the armrest 40 is used to support the elbow of the occupant.
  • the angle between the armrest 40 and the backrest bracket 400 is adjusted so that the elbow of the occupant is in the most comfortable state.
  • the limiting device is used to limit the angle between the armrest 40 and the backrest frame 400 when the wheelchair frame 10 is in the unfolded state.
  • the limiting device is not the inventive point of the present invention, and will not be repeated here.
  • the pedal bracket 50 is used to install a pedal supporting the feet of the occupant, and the pedal bracket 50 is rotatably disposed at one end of the pedal connecting frame 600.
  • first unlock the locking mechanism 30, disengage the locking block 31 from the locking hole 32, press down on the backrest bracket 400, and drive the connecting member 20 to rotate backward and downward relative to the rear wheel bracket 200, and drive the third shaft 13 to drive the
  • the movement of the four-bar linkage makes the seat bracket 300 rotate backward about the third rotating shaft 13, the backrest bracket 400 rotates forward about the third rotating shaft 13, and the armrest bracket 500 rotates downward about the first rotating shaft 11 to make the front wheel support 100 Rotate backwards around the second shaft 12, so that the connecting piece 20, the seat support 300, the back support 400, the armrest support 500, the pedal connection support 600, and the front wheel support 100 are folded toward the rear wheel support 200, and then the armrest Rotate back and down to close to the rear wheel bracket 200, and rotate the footrest bracket 50 to close to the front wheel bracket 100 to complete the folding of the foldable wheelchair.
  • the lower end of the front wheel bracket 100, the rear wheel bracket 200 and the front section of the armrest 40 are close to each other, and the front wheel bracket 100 is folded on the front side of the rear wheel bracket 200, and the armrest 40 is folded on the rear wheel bracket 200.
  • Rear side; the front end of the seat bracket 300, the upper end of the backrest bracket 400, and the upper end of the rear wheel bracket 200 are close to each other.

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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)
  • Carriages For Children, Sleds, And Other Hand-Operated Vehicles (AREA)

Abstract

一种可折叠轮椅，包括轮椅架(10)、连接件(20)和锁定机构(30)，轮椅架(10)包括前轮支架(100)、后轮支架(200)、座位支架(300)、靠背支架(400)和扶手支架(500)，前轮支架(100)的上端部和后轮支架(200)的上端部通过第一转轴(11)转动连接，扶手支架(500)的前端部可转动地连接于前轮支架(100)的上端部和/或后轮支架(200)的上端部，通过第二转轴(12)转动连接座位支架(300)和前轮支架(100)，通过第三转轴(13)转动连接靠背支架(400)和座位支架(300)，通过第四转轴(14)转动连接扶手支架(500)的后端部和靠背支架(400)，使前轮支架(100)、座位支架(300)、靠背支架(400)、扶手支架(500)组成四连杆机构，通过将连接件(20)的两端部分别转动连接在四连杆机构和后轮支架(200)上，能够通过连接件的转动带动四连杆机构运动，使轮椅架(10)在展开状态和折叠状态之间变换，实现了轮椅的展开和折叠，结构简单、操作方便。

Description

一种可折叠轮椅
相关申请的交叉引用
本申请要求2020年6月2日提交的申请号为CN 2020104878612的中国专利申请的优先权，其全部内容通过引用的方式并入本申请中。
技术领域
本发明属于医疗器械领域，具体涉及一种可折叠轮椅。
背景技术
在对患者的治疗和康复过程中，特别是对于无法独立行走的患者，通常采用坐轮椅的方式替代行走，这样能够使患者得到较好的治疗和康复，并且方便患者的日常生活。
现有的轮椅多采用固定结构的椅子架设在一对滚轮的转轴上制作而成，滚轮的直径较大，使得滚轮的上部能够方便的被使用者的手部够到，使用者通过手部转动滚轮使轮椅前进或后退，这种轮椅无法折叠，需要占用较大的空间，市场上也有一些可折叠的轮椅，但这些轮椅往往结构复杂，操作不便。
发明内容
本发明的目的是为了克服现有技术的缺点，提供一种结构简单、操作方便的可折叠轮椅。
根据本发明的一个方面，一种可折叠轮椅，包括具有展开状态和折叠状态的轮椅架，所述轮椅架包括：
前轮支架，所述前轮支架的底前部设置有前轮组件，所述前轮组件包括可转动的前轮；
后轮支架，所述后轮支架的底后部设置有后轮组件，所述后轮组件包括可转动的后轮，所述后轮支架的上端部和所述前轮支架的上端部通过第一转轴转动连接；
座位支架，所述座位支架的前部和所述前轮支架通过第二转轴转动连接；
靠背支架，所述靠背支架的下端部与所述座位支架的后端部通过第三转轴转动连接；及
扶手支架，所述扶手支架的前端部可转动地连接于所述前轮支架的上端部和/或所述后轮支架的上端部，所述扶手支架的后端部与所述靠背支架通过第四转轴转动连接；
其中，所述前轮支架、所述座位支架、所述靠背支架、所述扶手支架组成四连杆机构；
所述可折叠轮椅还包括：
连接件，所述连接件的一端部可转动地连接在所述四连杆机构上，所述连接件的另一端部可转动地连接在所述后轮支架上；及
锁定机构，所述锁定机构用于将所述轮椅架锁定在展开状态。
优选地，所述扶手支架的前端部通过所述第一转轴可转动地连接于所述前轮支架的上端部和所述后轮支架的上端部，所述前轮支架、所述座位支架、所述靠背支架、所述扶手支架通过所述第一转轴、所述第二转轴、所述第三转轴和所述第四转轴组成四连杆机构。
优选地，所述连接件的一端部可转动地连接在所述第三转轴上。
优选地，所述锁定机构用于将所述前轮支架、所述座位支架、所述靠背支架和所述扶手支架中的任意两个相邻支架的相对位置锁定；或，所述锁定机构用于将所述第一转轴、所述第二转轴、所述第三转轴、所述第四转轴中的任意一个转轴与其他转轴的相对位置锁定。
优选地，所述锁定机构用于将所述连接件与所述后轮支架的相对位置锁定。
进一步优选地，所述锁定机构包括可移动地设置在所述连接件上的锁定块、设置在所述后轮支架上的锁定孔，在所述锁定机构处于锁定状态时，所述锁定块插入所述锁定孔中，使所述连接件与所述后轮支架的相对位置锁定；在所述锁定机构处于解锁状态时，所述锁定块脱离所述锁定孔。
进一步优选地，所述锁定块的移动方向垂直于所述连接件的转动平面。
进一步优选地，所述连接件上设有用于容置所述锁定块的安装槽，所述锁定块可移动地设于所述安装槽中，所述安装槽内设有用于推动所述锁定块插入所述锁定孔的弹性件。
具体地，所述弹性件为压簧。
优选地，所述可折叠轮椅还包括扶手，所述扶手的厚度可转动地连接于所述靠背支架。
更优选地，所述可折叠轮椅还包括用于限定所述轮椅架处于展开状态时所述扶手与所述靠背支架之间的夹角的限位装置。
进一步优选地，所述扶手通过所述第四转轴可转动地连接于所述靠背支架。
进一步优选地，所述轮椅架还包括脚踏板连接架，所述脚踏板连接架设置在所述前轮支架的前部，所述脚踏板连接架所在的平面与所述前轮支架所在的平面相重合。
进一步优选地，所述可折叠轮椅还包括脚踏板支架，所述脚踏板支架可转动地设置在所述脚踏板连接架的前端部。
根据本发明的另一个方面，一种可折叠轮椅，包括具有展开状态和折叠状态的轮椅架， 其特征在于：所述轮椅架包括：
前轮支架，所述前轮支架的底前部设置有前轮组件，所述前轮组件包括可转动的前轮；
后轮支架，所述后轮支架的底后部设置有后轮组件，所述后轮组件包括可转动的后轮，所述后轮支架的上端部和所述前轮支架的上端部通过第一转轴转动连接；
座位支架，所述座位支架的前部和所述前轮支架通过第二转轴转动连接；
靠背支架，所述靠背支架的下端部与所述座位支架的后端部通过第三转轴转动连接；及
扶手支架，所述扶手支架的前端部可转动地连接于所述前轮支架的上端部和/或所述后轮支架的上端部，所述扶手支架的后端部与所述靠背支架通过第四转轴转动连接；
其中，所述前轮支架、所述座位支架、所述靠背支架、所述扶手支架组成四连杆机构；
所述可折叠轮椅还包括：
连接件，所述连接件的一端部可转动地连接在所述四连杆机构上，所述连接件的另一端部可转动地连接在所述后轮支架上。
优选地，所述可折叠轮椅还包括：
锁定机构，所述锁定机构用于将所述轮椅架锁定在展开状态。
更优选地，所述锁定机构用于将所述连接件与所述后轮支架的相对位置锁定。所述锁定机构设置在所述连接件和所述后轮支架上。
优选地，所述连接件的一端部可转动地连接在所述第三转轴上。
优选地，所述扶手支架的前端部通过所述第一转轴可转动地连接于所述前轮支架的上端部和所述后轮支架的上端部。
由于上述技术方案运用，本发明与现有技术相比具有下列优点：
本发明提供的可折叠轮椅，其轮椅架包括前轮支架、后轮支架、座位支架、靠背支架和扶手支架，扶手支架的前端部可转动地连接于前轮支架的上端部和/或后轮支架的上端部，通过第二转轴转动连接座位支架和前轮支架，通过第三转轴转动连接靠背支架和座位支架，通过第四转轴转动连接扶手支架的后端部和靠背支架，使前轮支架、座位支架、靠背支架、扶手支架组成四连杆机构，通过将连接件的两端部分别转动连接在四连杆机构和后轮支架上，能够通过连接件的转动带动四连杆机构运动，使轮椅架在展开状态和折叠状态之间变换，实现了所述可折叠轮椅的展开和折叠，结构简单、操作方便。
附图说明
为了更清楚地说明本发明的技术方案，下面将对实施例描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1为根据本发明实施例的一种可折叠轮椅在一视角下的立体示意图。
图2为根据本发明实施例的一种可折叠轮椅在另一视角下的立体示意图。
图3为根据本发明实施例的一种可折叠轮椅的侧视示意图，此时，轮椅架处于展开状态。
图4为根据本发明实施例的一种可折叠轮椅的侧视示意图，此时，轮椅架处于展开状态变换为折叠状态的过程中。
图5为根据本发明实施例的一种可折叠轮椅的侧视示意图，此时，轮椅架处于折叠状态。
图6是图2中A处的局部放大图。
其中：10.轮椅架；11.第一转轴；12.第二转轴；13.第三转轴；14.第四转轴；100.前轮支架；101.前轮组件；1011.前轮；200.后轮支架；201.后轮组件；2011.后轮；300.座位支架；400.靠背支架；500.扶手支架；600.脚踏板连接架；20.连接件；30.锁定机构；31.锁定块；32.锁定孔；40.扶手；50.脚踏板支架。
具体实施方式
下面结合附图对本发明的较佳实施例进行详细阐述，以使本发明的优点和特征更易于被本领域技术人员理解，从而对本发明的保护范围做出更为清楚明确的界定。
本发明描述的前后方向、左右方向和上下方向是基于乘坐者在乘坐本发明提供的可折叠轮椅(即轮椅架处于展开状态)时观察到的前后方向、左右方向和上下方向。
下面结合附图所示的实施例对本发明作进一步描述。
如图1-6所示，本实施例提供一种可折叠轮椅，其包括具有展开状态和折叠状态的轮椅架10。轮椅架10包括分别位于左右两侧的侧支架，每个侧支架分别包括：前轮支架100、后轮支架200、座位支架300、靠背支架400和扶手支架500。其中，前轮支架100由前向后倾斜地向上延伸，前轮支架100的底前部设置有前轮组件101，前轮组件101包括可转动的前轮1011；后轮支架200由后向前倾斜地向上延伸，后轮支架200的底后部设置有后轮组件201，后轮组件201包括可转动的后轮2011，后轮支架200的上端部和前轮支架100的上端部通过第一转轴11相转动连接；座位支架300用于承载乘坐者的臀部，座位支架300上设置有座位板或者套装有座位套，座位支架300的前部和前轮支架100的中上部通过第二转轴12相转动 连接，所述中上部是指位于略高于前轮支架100中部的位置；靠背支架400用于支撑乘坐者的背部，靠背支架400的下端部与座位支架300的后端部通过第三转轴13相转动连接，靠背支架400上安装有靠背板或者套装有靠背套；扶手支架500的前端部可转动地连接在第一转轴11上，扶手支架500的后端部与靠背支架400的中部通过第四转轴14相转动连接。每侧的前轮支架100、座位支架300、靠背支架400和扶手支架500分别通过第一转轴11、第二转轴12、第三转轴13和第四转轴14组成四连杆机构。两侧的前轮支架100之间固定连接有连杆，连杆上设置有脚踏板连接架600，其向前下方延伸。
所述可折叠轮椅还包括连接件20和锁定机构30。其中，连接件20的一端部可转动地连接在所述四连杆机构上。具体地，连接件20的一端部可转动地连接在第三转轴13上，即，连接件20的一端部、座位支架300的后端部和靠背支架400的下端部通过第三转轴13相转动连接；连接件20的另一端部可转动地连接在后轮支架200上，例如通过枢轴连接。如图3所示，当轮椅架10处于展开状态时，连接件20位于后轮支架200的内侧及座位支架300的外侧，当从侧面观看时，连接件20被后轮支架200遮挡。
锁定机构30用于将轮椅架10锁定在展开状态，所述锁定机构用于将所述前轮支架、所述座位支架、所述靠背支架和所述扶手支架中的任意两个相邻支架的相对位置锁定；或，所述锁定机构用于将所述第一转轴、所述第二转轴、所述第三转轴、所述第四转轴中的任意一个转轴与其他转轴的相对位置锁定。具体地，锁定机构30通过将连接件20与后轮支架200的相对位置锁定使轮椅架10锁定在展开状态。锁定机构30包括锁定块31和锁定孔32，锁定块31可移动地设置在连接件20上，锁定块31的移动方向垂直于连接件20的转动平面，锁定孔32设置在后轮支架200上，在锁定机构30处于锁定状态时，锁定块31插入锁定孔32中，使连接件20与后轮支架200的相对位置保持锁定，在锁定机构30处于解锁状态时，锁定块31脱离锁定孔32，连接件20能够相对于后轮支架200转动。具体地，连接件20上设有用于容置锁定块31的安装槽，锁定块31可移动地设于安装槽中，该安装槽中还设有用于推动锁定块31插入锁定孔32的弹性件。弹性件具体为顶设于安装槽的槽底和锁定块31之间的压簧。当锁定机构处于解锁状态时，随着轮椅架展开，锁定块31移动至锁定孔32处，压簧复位，进而推动锁定块31插入锁定孔32中，自动将轮椅架10锁定在展开状态。解锁时，向连接件20或后轮支架200施加外使二者之间具有相对转动的趋势，在例如锁定块31和后轮支架200之间采用斜面配合接触的情形下，锁定块31受到来自后轮支架200的外力(该外力 应足够大)而缩回至安装槽内。
本实施例中，所述可折叠轮椅还包括扶手40、限位装置和脚踏板支架50。扶手40可转动的设置在靠背支架400上，具体地，扶手40的后端部可转动地设置在第四转轴14上，其中，每侧的扶手40、扶手支架500及靠背支架400自外至内设置。扶手40用于支撑乘坐者的肘部，当然，不设置扶手40，通过扶手支架500支撑乘坐者的肘部也是可行的。本实施例中设置的扶手40，通过将扶手40与靠背支架400的角度进行调节，以使乘坐者的肘部处于最舒适的状态。所述限位装置用于限定轮椅架10处于展开状态时，扶手40与靠背支架400之间的夹角。所述限位装置不是本发明的发明点，在此不再赘述。脚踏板支架50用于安装承托乘坐者脚部的脚踏板，脚踏板支架50可转动地设置在脚踏板连接架600的一端部。
下面对本发明提供的可折叠轮椅的折叠过程进行说明，以便本发明的优点和特征更易于被本领域技术人员理解。
在需要折叠时，先将锁定机构30解锁，使锁定块31脱离锁定孔32，下压靠背支架400，带动连接件20相对于后轮支架200向后下转动，通过第三转轴13带动所述四连杆机构运动，使座位支架300绕第三转轴13向后转动，使靠背支架400绕第三转轴13向前转动，使扶手支架500绕第一转轴11向下转动，使前轮支架100绕第二转轴12向后转动，使得连接件20、座位支架300、靠背支架400、扶手支架500、脚踏板连接支架600和前轮支架100分别向后轮支架200靠拢收叠，再将扶手40向后下转动至与后轮支架200靠拢，将脚踏板支架50转动至与前轮支架100靠拢，即可完成所述可折叠轮椅的折叠。折叠后，前轮支架100的下端部、后轮支架200及扶手40的前段部相互靠拢，且前轮支架100收折于后轮支架200的前侧，扶手40收折于后轮支架200的后侧；座位支架300的前端部、靠背支架400的上端部和后轮支架200的上端部相互靠拢。
上述实施例只为说明本发明的技术构思及特点，其目的在于让熟悉此项技术的人士能够了解本发明的内容并据以实施，并不能以此限制本发明的保护范围。凡根据本发明精神实质所作的等效变化或修饰，都应涵盖在本发明的保护范围之内。

Claims (19)

  1. 一种可折叠轮椅，包括具有展开状态和折叠状态的轮椅架，其特征在于：所述轮椅架包括：
    前轮支架，所述前轮支架的底前部设置有前轮组件，所述前轮组件包括可转动的前轮；
    后轮支架，所述后轮支架的底后部设置有后轮组件，所述后轮组件包括可转动的后轮，所述后轮支架的上端部和所述前轮支架的上端部通过第一转轴转动连接；
    座位支架，所述座位支架的前部和所述前轮支架通过第二转轴转动连接；
    靠背支架，所述靠背支架的下端部与所述座位支架的后端部通过第三转轴转动连接；及扶手支架，所述扶手支架的前端部可转动地连接于所述前轮支架的上端部和/所述后轮支架的上端部，所述扶手支架的后端部与所述靠背支架通过第四转轴转动连接；
    其中，所述前轮支架、所述座位支架、所述靠背支架、所述扶手支架组成四连杆机构；
    所述可折叠轮椅还包括：
    连接件，所述连接件的一端部可转动地连接在所述四连杆机构上，所述连接件的另一端部可转动地连接在所述后轮支架上；及
    锁定机构，所述锁定机构用于将所述轮椅架锁定在展开状态。
  2. 根据权利要求1所述的可折叠轮椅，其特征在于：所述连接件的一端部可转动地连接在所述第三转轴上。
  3. 根据权利要求1所述的可折叠轮椅，其特征在于：所述锁定机构用于将所述前轮支架、所述座位支架、所述靠背支架和所述扶手支架中的任意两个相邻支架的相对位置锁定；或，所述锁定机构用于将所述第一转轴、所述第二转轴、所述第三转轴、所述第四转轴中的任意一个转轴与其他转轴的相对位置锁定。
  4. 根据权利要求1所述的可折叠轮椅，其特征在于：所述锁定机构用于将所述连接件与所述后轮支架的相对位置锁定。
  5. 根据权利要求4所述的可折叠轮椅，其特征在于：所述锁定机构包括可移动地设置在所述连接件上的锁定块、设置在所述后轮支架上的锁定孔，在所述锁定机构处于锁定状态时，所述锁定块插入所述锁定孔中，使所述连接件与所述后轮支架的相对位置锁定；在所述锁定机构处于解锁状态时，所述锁定块脱离所述锁定孔。
  6. 根据权利要求5所述的可折叠轮椅，其特征在于：所述锁定块的移动方向垂直于所述连接件的转动平面。
  7. 根据权利要求5所述的可折叠轮椅，其特征在于：所述连接件上设有用于容置所述锁定块的安装槽，所述锁定块可移动地设于所述安装槽中，所述安装槽内设有用于推动所述锁定块插入所述锁定孔的弹性件。
  8. 根据权利要求7所述的可折叠轮椅，其特征在于：所述弹性件为压簧。
  9. 根据权利要求1所述的可折叠轮椅，其特征在于：所述可折叠轮椅还包括扶手，所述扶手的后部可转动地连接于所述靠背支架。
  10. 根据权利要求9所述的可折叠轮椅，其特征在于：所述可折叠轮椅还包括用于限定所述轮椅架处于展开状态时所述扶手与所述靠背支架之间的夹角的限位装置。
  11. 根据权利要求9所述的可折叠轮椅，其特征在于：所述扶手通过所述第四转轴可转动地连接于所述靠背支架。
  12. 根据权利要求1-11中任意一项所述的可折叠轮椅，其特征在于：所述轮椅架还包括脚踏板连接架，所述脚踏板连接架设置在所述前轮支架的前部，所述脚踏板连接架所在的平面与所述前轮支架所在的平面相重合。
  13. 根据权利要求12所述的可折叠轮椅，其特征在于：所述可折叠轮椅还包括脚踏板支架，所述脚踏板支架可转动地设置在所述脚踏板连接架的前端部。
  14. 根据权利要求1所述的可折叠轮椅，其特征在于：所述扶手支架的前端部通过所述第一转轴可转动地连接于所述前轮支架的上端部和所述后轮支架的上端部。
  15. 一种可折叠轮椅，包括具有展开状态和折叠状态的轮椅架，其特征在于：所述轮椅架包括：
    前轮支架，所述前轮支架的底前部设置有前轮组件，所述前轮组件包括可转动的前轮；
    后轮支架，所述后轮支架的底后部设置有后轮组件，所述后轮组件包括可转动的后轮，所述后轮支架的上端部和所述前轮支架的上端部通过第一转轴转动连接；
    座位支架，所述座位支架的前部和所述前轮支架通过第二转轴转动连接；
    靠背支架，所述靠背支架的下端部与所述座位支架的后端部通过第三转轴转动连接；及
    扶手支架，所述扶手支架的前端部可转动地连接于所述前轮支架的上端部和/或所述后轮支架的上端部，所述扶手支架的后端部与所述靠背支架通过第四转轴转动连接；
    其中，所述前轮支架、所述座位支架、所述靠背支架、所述扶手支架组成四连杆机构；及
    所述可折叠轮椅还包括：
    连接件，所述连接件的一端部可转动地连接在所述四连杆机构上，所述连接件的另一端部可转动地连接在所述后轮支架上。
  16. 根据权利要求15所述的可折叠轮椅，其特征在于，所述可折叠轮椅还包括：
    锁定机构，所述锁定机构用于将所述轮椅架锁定在展开状态。
  17. 根据权利要求15所述的可折叠轮椅，其特征在于：所述锁定机构设置在所述连接件和所述后轮支架上。
  18. 根据权利要求15所述的可折叠轮椅，其特征在于：所述连接件的一端部可转动地连接在所述第三转轴上。
  19. 根据权利要求15所述的可折叠轮椅，其特征在于：所述扶手支架的前端部通过所述第一转轴可转动地连接于所述前轮支架的上端部和所述后轮支架的上端部。
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CN111671584A (zh) * 2020-06-02 2020-09-18 浙江爱司米电气有限公司 一种可折叠轮椅
CN112618182B (zh) * 2020-12-30 2023-03-14 广东博方众济医疗科技有限公司 轮椅助行器
CN113712746B (zh) * 2021-10-12 2023-08-29 安徽金百合医疗器械有限公司 折叠设备用转轴装置及折叠设备

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