WO2021244527A1 - 可折叠轮椅 - Google Patents
可折叠轮椅 Download PDFInfo
- Publication number
- WO2021244527A1 WO2021244527A1 PCT/CN2021/097673 CN2021097673W WO2021244527A1 WO 2021244527 A1 WO2021244527 A1 WO 2021244527A1 CN 2021097673 W CN2021097673 W CN 2021097673W WO 2021244527 A1 WO2021244527 A1 WO 2021244527A1
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- WIPO (PCT)
- Prior art keywords
- bracket
- rear wheel
- rotating shaft
- armrest
- wheel bracket
- Prior art date
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Classifications
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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
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47C—CHAIRS; SOFAS; BEDS
- A47C4/00—Foldable, collapsible or dismountable chairs
- A47C4/04—Folding chairs with inflexible seats
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47C—CHAIRS; SOFAS; BEDS
- A47C4/00—Foldable, collapsible or dismountable chairs
- A47C4/28—Folding chairs with flexible coverings for the seat or back elements
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62B—HAND-PROPELLED VEHICLES, e.g. HAND CARTS OR PERAMBULATORS; SLEDGES
- B62B7/00—Carriages for children; Perambulators, e.g. dolls' perambulators
- B62B7/04—Carriages for children; Perambulators, e.g. dolls' perambulators having more than one wheel axis; Steering devices therefor
- B62B7/06—Carriages for children; Perambulators, e.g. dolls' perambulators having more than one wheel axis; Steering devices therefor collapsible or foldable
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 with an unfolded state and a folded state.
- a wheel assembly 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 rear wheel
- the upper end of the bracket and the upper end of the front wheel bracket are rotatably connected by a first rotation axis; a seat bracket, the front of the seat bracket and the front wheel bracket are rotatably connected by a second rotation axis;
- the backrest bracket the The lower end of the backrest bracket is rotatably connected with the rear end of the seat bracket through a third rotation axis;
- the armrest bracket, the front end of the armrest bracket is rotatably connected to the first rotation axis, and the armrest bracket
- the rear end is rotatably connected with the backrest support through a fourth rotation shaft; the front wheel support, the
- a sliding sleeve is sleeved on the rear wheel support, and the third rotation shaft is connected to a side surface of the sliding sleeve.
- the locking mechanism is used to lock the relative position of the sliding sleeve and the rear wheel bracket, and the locking mechanism includes a locking pin telescopically arranged on the sliding sleeve, and In the locking hole on the wheel bracket, when the locking mechanism is in the locked state, the locking pin is inserted into the locking hole to lock the relative position of the sliding sleeve and the rear wheel bracket.
- the locking mechanism further includes a guide groove provided on the outer wall of the rear wheel support and extending along the axial direction of the rear wheel support, and the locking hole is opened on the bottom wall of the guide groove, and When the locking mechanism is in the locked state, a part of the locking pin is kept in the guide groove. When the locking mechanism is in the unlocked state, a part of the locking pin is still kept in the guide groove to prevent The sliding sleeve rotates along the axis of the rear wheel bracket.
- the telescopic direction of the locking pin is perpendicular to the sliding direction of the sliding sleeve.
- the locking mechanism further includes an elastic member having a tendency to drive the locking pin into the locking hole.
- the outer wall of the rear wheel bracket is provided with a sliding groove extending in the axial direction of the rear wheel bracket, and one end of the third rotating shaft is slidably arranged in the sliding groove to prevent The third rotating shaft rotates along the axis of the rear wheel bracket.
- the third rotating shaft can be arranged telescopically along its own axis, and the locking mechanism includes the third rotating shaft, a locking hole opened on the bottom wall of the sliding groove, and the locking mechanism is In the locked state, the third rotating shaft is inserted into the locking hole to lock the relative positions of the third rotating shaft with the first rotating shaft, the second rotating shaft, and the fourth rotating shaft.
- the expansion and contraction direction of the third rotating shaft is perpendicular to the extension direction of the sliding groove.
- the locking mechanism further includes an elastic member having a tendency to drive the third rotation shaft to be inserted into the locking hole.
- the foldable wheelchair further includes an armrest and a limit device, the armrest is rotatably arranged on the backrest bracket through the fourth rotation axis, and the limit device is used to limit the armrest and The included angle between the backrest brackets.
- the wheelchair frame further includes a footrest connection frame, the footrest connection frame is fixed at the front of the front wheel support and extends forward and downward, and the plane on which the footrest connection frame is located is in line with The planes where the front wheel supports are overlapped, the foldable wheelchair further includes a footrest support, and the footrest support is rotatably arranged at the front end of the footrest connection frame.
- a foldable wheelchair includes a wheelchair frame with an unfolded state and a folded state.
- a wheel assembly 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 rear wheel
- the upper end of the bracket and the upper end of the front wheel bracket are rotatably connected by a first rotation axis; a seat bracket, the front of the seat bracket and the front wheel bracket are rotatably connected by a second rotation axis;
- the backrest bracket the The lower end of the backrest bracket is rotatably connected with the rear end of the seat bracket through a third rotation axis;
- the armrest bracket, the front end of the armrest bracket is rotatably connected to the first rotation axis, and the armrest bracket
- the rear end is rotatably connected with the backrest support through a fourth rotation shaft; the front wheel support, the
- the locking hole is opened on the bottom wall of the guide groove.
- a part of the locking pin is kept in the guide groove.
- a part of the locking pin is still kept in the guide groove to prevent the sliding sleeve from running along the rear wheel.
- the axis of the stent rotates; the telescopic direction of the locking pin is perpendicular to the sliding direction of the sliding sleeve; the locking mechanism further includes an elastic member having a mechanism for driving the locking pin to be inserted into the locking hole Trend;
- the foldable wheelchair also includes an armrest and a limit device, the armrest is rotatably arranged on the backrest bracket through the fourth rotation axis, and the limit device is used to limit the armrest and the The included angle between the backrest brackets; the wheelchair frame also includes a footrest connecting frame, the footrest connecting frame is fixed to the front of the front wheel bracket and extends forward and downward, the footrest connecting frame The plane where the front wheel bracket is located coincides with the plane where the front wheel bracket is located, 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 with an unfolded state and a folded state.
- a wheel assembly 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 rear wheel The upper end of the bracket and the upper end of the front wheel bracket are rotatably connected by a first rotation axis; a seat bracket, the front of the seat bracket and the front wheel bracket are rotatably connected by a second rotation axis; the backrest bracket, the The lower end of the backrest bracket and the rear end of the seat bracket are rotatably connected by a third rotating shaft;
- An armrest bracket the front end of the armrest bracket is rotatably connected to the first rotation axis, and the rear end of the armrest bracket is rotatably connected to the backrest bracket through a fourth rotation axis;
- the front wheel bracket, The seat bracket, the backrest bracket, and the armrest bracket form a four-bar linkage mechanism through the first rotation shaft, the second rotation shaft, the third rotation shaft, and the fourth rotation shaft;
- the third rotating shaft is slidably arranged with the rear wheel bracket, the third rotating shaft can slide along the axial direction of the rear wheel bracket, and the foldable wheelchair further includes a device for locking the wheelchair frame on The locking mechanism in the unfolded state;
- the outer wall of the rear wheel bracket is provided with a sliding groove extending along the axial direction of the rear wheel bracket, and one end of the third rotating shaft is slidably arranged in the sliding groove , Can prevent the third rotating shaft from rotating along the axis of the rear wheel bracket;
- the third rotating shaft can be arranged telescopically
- the present invention has the following advantages compared with the prior art:
- the foldable wheelchair provided by the present invention includes a wheelchair frame and a locking mechanism.
- the wheelchair frame includes a front wheel frame, a rear wheel frame, a seat frame, a backrest frame, and an armrest frame.
- the bracket and the rear wheel bracket are connected to the seat bracket and the front wheel bracket by the second rotation axis
- the backrest bracket and the seat bracket are connected by the third rotation axis
- the rear end of the armrest bracket and the backrest bracket are connected by the fourth rotation axis
- the front wheel bracket, seat bracket, backrest bracket, and armrest bracket form a four-bar linkage mechanism through the first rotation axis, the second rotation axis, the third rotation axis and the fourth rotation axis
- the third rotation axis is aligned with the rear wheel support.
- the third rotating shaft can slide along the axial direction of the rear wheel bracket.
- the third rotating shaft can drive the four-bar linkage to move, so that the wheelchair frame can be in the unfolded and folded states Then, the wheelchair frame is locked in the unfolded state by the locking mechanism, so that the unfolding and folding of the folding wheelchair is realized, and the structure is simple and the operation is convenient.
- Fig. 1 is a three-dimensional schematic diagram of the present invention.
- FIG. 2 is a schematic side view of the present invention. At this time, the wheelchair frame is in an unfolded state.
- Fig. 3 is a schematic side view of the present invention. At this time, the wheelchair frame is in the process of transforming from an unfolded state to a folded state.
- Figure 4 is a schematic side view of the present invention. At this time, the wheelchair frame is in a folded state.
- Fig. 5 is an enlarged schematic cross-sectional view of the sliding sleeve in Fig. 2.
- Fig. 6 is an enlarged schematic cross-sectional view of the sliding sleeve in Fig. 3.
- Fig. 7 is a partial enlarged schematic diagram of A in Fig. 5.
- the front and rear directions, the left and right directions, and the up and down directions described in the present invention are based on the front and back directions, the left and right directions, and the up and down directions observed by the occupant when riding the foldable wheelchair provided by the present invention.
- the foldable wheelchair provided by the present invention includes a wheelchair frame 10 with an unfolded state and a folded state.
- the wheelchair frame 10 includes: a front wheel support 100, a rear wheel support 200, a seat support 300, and a backrest support 400 ,
- the armrest bracket 500 and the footrest connecting frame 600 wherein the front wheel bracket 100 extends upward obliquely from front to back, the bottom front of the front wheel bracket 100 is provided with a front wheel assembly 101, and the front wheel assembly 101 includes a rotatable Front wheel 1011;
- the rear wheel bracket 200 extends upwards obliquely from back to front.
- the bottom rear of the rear wheel bracket 200 is provided with a rear wheel assembly 201.
- the rear wheel assembly 201 includes a rotatable rear wheel 2011.
- the upper end of the rear wheel bracket 200 The upper end of the front wheel bracket 100 and the upper end of the front wheel bracket 100 are rotatably connected by the first rotating shaft 11; the seat bracket 300 is used to carry the buttocks and thighs of the occupant.
- the front part of 300 and the upper middle part of the front wheel support 100 are rotatably connected by the second rotating shaft 12.
- the upper middle part refers to a position slightly higher than the middle part of the front wheel support 100; the backrest support 400 is used to support the back of the occupant , The lower end of the backrest bracket 400 and the rear end of the seat bracket 300 are rotatably connected by the third rotating shaft 13, and the backrest bracket 400 is installed with a backrest plate or sleeved with a backrest cover; the front end of the armrest bracket 500 is rotatably connected to the first On a rotating shaft 11, the rear end of the armrest bracket 500 and the middle of the backrest bracket 400 are rotatably connected by a fourth rotating shaft 14; the pedal connecting frame 600 is fixed on the front of the front wheel bracket 100 and extends forward and downward, The plane where the pedal connecting frame 600 is located coincides with the plane where the front wheel bracket 100 is located; The three rotating shafts 13 and the fourth rotating shaft 14 constitute a four-bar linkage mechanism.
- the foldable wheelchair also includes a sliding sleeve 20, a locking mechanism 70, an armrest 40, a limiting device and a footrest bracket 50, wherein the sliding sleeve 20 is slidably sleeved on the rear wheel bracket 200, and the third rotating shaft 13 is connected On the side of the sliding sleeve 20, when the sliding sleeve 20 slides relative to the rear wheel bracket 200, it can drive the four-bar linkage to move, so that the wheelchair frame 10 can be changed between the unfolded state and the folded state; the locking mechanism 70 is used for The wheelchair frame 10 is locked in the unfolded state.
- the locking mechanism 70 locks the wheelchair frame 10 in the unfolded state by locking the relative position of the sliding sleeve 20 and the rear wheel bracket 200.
- the locking mechanism 70 includes a locking pin 701, a locking hole 702, and a guide.
- the groove 703 and the elastic member 704, the locking pin 701 is telescopically arranged on the sliding sleeve 20, the end of the locking pin 701 close to the sliding sleeve 20 is connected with a pull cord (not shown in the figure) that is convenient for pulling, and the locking pin 701
- the telescopic direction is perpendicular to the sliding direction of the sliding sleeve 20, the guide groove 703 is provided on the outer wall of the rear wheel bracket 200 and extends along the axial direction of the rear wheel bracket 200, and the locking hole 702 is opened on the bottom wall of the guide groove 703.
- the middle of the locking pin 701 is kept in the guide groove 703, and the end of the locking pin 701 is inserted into the locking hole 702 to keep the sliding sleeve 20 and the rear wheel bracket 200 locked, and the locking mechanism 70 is in the unlocked state
- the end of the locking pin 701 is separated from the locking hole 702, but still remains in the guide groove 703, the sliding sleeve 20 can slide relative to the rear wheel bracket 200.
- the advantage of this arrangement is that no matter the wheelchair frame 10 is in the unfolded state, The folding state, the transformation process from the unfolded state to the folded state, and the transformation process from the folded state to the unfolded state can all prevent the sliding sleeve 20 from rotating along the axis of the rear wheel support 200, thereby enhancing the stability of the wheelchair frame 10;
- the member 704 is a compression spring sleeved on the locking pin 701. Specifically, one end of the elastic member 704 is pressed against the inner wall of the sliding sleeve 20, and the other end of the elastic member 704 is pressed against the protrusion on the outer wall of the locking pin 701. On the edge 705, the elastic member 704 has a tendency to drive the locking pin 701 into the locking hole 702.
- the rear end of the armrest 40 is rotatably arranged on the backrest support 400 through the fourth rotation shaft 14.
- the armrest 40 is used to support the elbow of the occupant.
- the armrest 40 is not provided, and the elbow of the occupant is supported by the armrest support 500
- the angle between the armrest bracket 500 and the backrest bracket 400 is difficult to adjust, and it is difficult to make the occupant’s elbows in the most comfortable state, and the rotating parts at the first rotating shaft 11 are easy to ride on.
- the person’s elbow is pinched, which poses a certain safety hazard; the limiting device is used to limit the angle between the armrest 40 and the backrest 400 when the wheelchair frame 10 is in the unfolded state.
- the limiting device is a prior art, It is not the inventive point of the present invention, and will not be repeated here; the pedal bracket 50 is used to install the pedal supporting the feet of the occupant, and the pedal bracket 50 is rotatably arranged on the pedal connecting frame 600 The front end.
- the foldable wheelchair provided by the present invention cannot be folded in the left-right direction, that is, the distance between the armrests on the left and right sides is kept constant.
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Abstract
一种可折叠轮椅，包括轮椅架（10）和锁定机构（70），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），通过第一转动轴（11）转动连接扶手支架（500）的前端部、前轮支架（100）和后轮支架（200），通过第二转动轴（12）转动连接座位支架（300）和前轮支架（100），通过第三转动轴（13）转动连接靠背支架（400）和座位支架（300），通过第四转动轴（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，通过使第三转动轴（13）与后轮支架（200）相滑动地设置，在第三转动轴（13）相对于后轮支架（200）滑动时能够带动四连杆机构运动，使轮椅架（10）能够在展开状态和折叠状态之间变换，再通过锁定机构（70）将轮椅架（10）锁定在展开状态，实现了折叠轮椅的展开和折叠，结构简单、操作方便。
Description
本发明属于医疗器械领域，具体涉及一种可折叠轮椅。
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。
为达到上述目的，本发明采用的技术方案是，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动轴转动连接；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动轴转动连接；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动轴转动连接；扶手支架，所述扶手支架的前端部可转动地连接在所述第一转动轴上，所述扶手支架的后端部与所述靠背支架通过第四转动轴转动连接；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动轴、所述第二转动轴、所述第三转动轴和所述第四转动轴组成四连杆机构；所述第三转动轴与所述后轮支架相滑动地设置，所述第三转动轴能 够沿所述后轮支架的轴向方向滑动，所述可折叠轮椅还包括用于将所述轮椅架锁定在展开状态的锁定机构。
优选地，所述后轮支架上套设有滑套，所述第三转动轴连接在所述滑套的侧面上。
进一步优选地，所述锁定机构用于将所述滑套与所述后轮支架的相对位置锁定，所述锁定机构包括可伸缩地设置在所述滑套上的锁定销、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，所述锁定销插入所述锁定孔中，使所述滑套与所述后轮支架的相对位置锁定。
进一步优选地，所述锁定机构还包括设置在所述后轮支架外壁上沿所述后轮支架轴向方向延伸的导向槽，所述锁定孔开设在所述导向槽的底壁上，在所述锁定机构处于锁定状态时，所述锁定销有一部分保持在所述导向槽内，在所述锁定机构处于解锁状态时，所述锁定销仍有一部分保持在所述导向槽内，以防止所述滑套沿所述后轮支架的轴心线转动。
进一步优选地，所述锁定销的伸缩方向与所述滑套的滑动方向相垂直。
进一步优选地，所述锁定机构还包括弹性件，所述弹性件具有驱使所述锁定销插入所述锁定孔的趋势。
优选地，所述后轮支架的外壁上开设有沿所述后轮支架的轴向方向延伸的滑槽，所述第三转动轴的一端部可滑动地设置在所述滑槽内，能够防止所述第三转动轴沿所述后轮支架的轴心线转动。
优选地，所述第三转动轴可沿自身轴线方向伸缩的设置，所述锁定机构包括所述第三转动轴、开设在所述滑槽的底壁上的锁定孔，在所述锁定机构处于锁定状态时，所述第三转动轴插入所述锁定孔中，使所述第三转动轴与所述第一转动轴、所述第二转动轴和所述第四转动轴的相对位置锁定。
进一步优选地，所述第三转动轴的伸缩方向与所述滑槽的延伸方向相垂直。
进一步优选地，所述锁定机构还包括弹性件，所述弹性件具有驱使所述第三转动轴插 入所述锁定孔的趋势。
进一步优选地，所述可折叠轮椅还包括扶手和限位装置，所述扶手通过所述第四转动轴可转动地设置在所述靠背支架上，所述限位装置用于限定所述扶手与所述靠背支架之间的夹角。
进一步优选地，所述轮椅架还包括脚踏板连接架，所述脚踏板连接架固定在所述前轮支架的前部并向前下方延伸，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，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。
为达到上述目的，本发明采用的技术方案是，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动轴转动连接；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动轴转动连接；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动轴转动连接；扶手支架，所述扶手支架的前端部可转动地连接在所述第一转动轴上，所述扶手支架的后端部与所述靠背支架通过第四转动轴转动连接；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动轴、所述第二转动轴、所述第三转动轴和所述第四转动轴组成四连杆机构；所述第三转动轴与所述后轮支架相滑动地设置，所述第三转动轴能够沿所述后轮支架的轴向方向滑动，所述可折叠轮椅还包括用于将所述轮椅架锁定在展开状态的锁定机构；所述后轮支架上套设有滑套，所述第三转动轴连接在所述滑套的侧面上；所述锁定机构用于将所述滑套与所述后轮支架的相对位置锁定，所述锁定机构包括可伸缩地设置在所述滑套上的锁定销、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，所述锁定销插入所述锁定孔中，使所述滑套与所述后轮支架的相对位置锁定； 所述锁定机构还包括设置在所述后轮支架外壁上沿所述后轮支架轴向方向延伸的导向槽，所述锁定孔开设在所述导向槽的底壁上，在所述锁定机构处于锁定状态时，所述锁定销有一部分保持在所述导向槽内，在所述锁定机构处于解锁状态时，所述锁定销仍有一部分保持在所述导向槽内，以防止所述滑套沿所述后轮支架的轴心线转动；所述锁定销的伸缩方向与所述滑套的滑动方向相垂直；所述锁定机构还包括弹性件，所述弹性件具有驱使所述锁定销插入所述锁定孔的趋势；所述可折叠轮椅还包括扶手和限位装置，所述扶手通过所述第四转动轴可转动地设置在所述靠背支架上，所述限位装置用于限定所述扶手与所述靠背支架之间的夹角；所述轮椅架还包括脚踏板连接架，所述脚踏板连接架固定在所述前轮支架的前部并向前下方延伸，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，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。
为达到上述目的，本发明采用的技术方案是，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动轴转动连接；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动轴转动连接；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动轴转动连接；
扶手支架，所述扶手支架的前端部可转动地连接在所述第一转动轴上，所述扶手支架的后端部与所述靠背支架通过第四转动轴转动连接；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动轴、所述第二转动轴、所述第三转动轴和所述第四转动轴组成四连杆机构；所述第三转动轴与所述后轮支架相滑动地设置，所述第三转动轴能够沿所述后轮支架的轴向方向滑动，所述可折叠轮椅还包括用于将所述轮椅架锁定在展开状态的锁定机构；所述后轮支架的外壁上开设有沿所述后轮支架的轴向方向延伸的滑槽， 所述第三转动轴的一端部可滑动地设置在所述滑槽内，能够防止所述第三转动轴沿所述后轮支架的轴心线转动；所述第三转动轴可沿自身轴线方向伸缩的设置，所述锁定机构包括所述第三转动轴、开设在所述滑槽的底壁上的锁定孔，在所述锁定机构处于锁定状态时，所述第三转动轴插入所述锁定孔中，使所述第三转动轴与所述第一转动轴、所述第二转动轴和所述第四转动轴的相对位置锁定；所述第三转动轴的伸缩方向与所述滑槽的延伸方向相垂直；所述锁定机构还包括弹性件，所述弹性件具有驱使所述第三转动轴插入所述锁定孔的趋势；所述可折叠轮椅还包括扶手和限位装置，所述扶手通过所述第四转动轴可转动地设置在所述靠背支架上，所述限位装置用于限定所述扶手与所述靠背支架之间的夹角；所述轮椅架还包括脚踏板连接架，所述脚踏板连接架固定在所述前轮支架的前部并向前下方延伸，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，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。
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，包括轮椅架和锁定机构，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，通过第一转动轴转动连接扶手支架的前端部、前轮支架和后轮支架，通过第二转动轴转动连接座位支架和前轮支架，通过第三转动轴转动连接靠背支架和座位支架，通过第四转动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、扶手支架通过第一转动轴、第二转动轴、第三转动轴和第四转动轴组成四连杆机构，通过使第三转动轴与后轮支架相滑动地设置，使第三转动轴能够沿后轮支架的轴向方向滑动，在第三转动轴相对于后轮支架滑动时能够带动四连杆机构运动，使轮椅架能够在展开状态和折叠状态之间变换，再通过锁定机构将轮椅架锁定在展开状态，实现了所述折叠轮椅的展开和折叠，结构简单、操作方便。
图1为本发明的立体示意图。
图2为本发明的侧视示意图，此时，轮椅架处于展开状态。
图3为本发明的侧视示意图，此时，轮椅架处于展开状态变换为折叠状态的过程中。
图4为本发明的侧视示意图，此时，轮椅架处于折叠状态。
图5为图2中滑套处的剖视放大示意图。
图6为图3中滑套处的剖视放大示意图。
图7为图5中A处的局部放大示意图。
其中：10.轮椅架；11.第一转动轴；12.第二转动轴；13.第三转动轴；14.第四转动轴；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.滑套；40.扶手；50.脚踏板支架；70.锁定机构；701.锁定销；702.锁定孔；703.导向槽；704.弹性件；705.凸缘。
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1-7所示，本发明提供的可折叠轮椅，包括具有展开状态和折叠状态的轮椅架10，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、扶手支架500和脚踏板连接架600，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动轴11相转动连接；座位支架300用于承载乘坐者的臀部及大腿部，座位支架300上设置有座位板或套装有座位套，座位支架300的前部和前轮支架100的中上部通过第二转动轴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动轴13相转动连接，靠背支架400上安装靠背板或套装有靠背套；扶手支架500的前端部可转动地连接在第一转动轴11上，扶手支架500的后端部与靠背支架400的中部通过第四转动轴14相转动连接；脚踏板连接架600固定在前轮支架100的前部并向前下方延伸，脚踏板连接架600所在的平面与前轮支架100所在的平面相重合；前轮支架100、座位支架300、靠背支架400和扶手支架500通过第一转动轴11、第二转动轴12、第三转动轴13和第四转动轴14组成四连杆机构。
该可折叠轮椅还包括滑套20、锁定机构70、扶手40、限位装置和脚踏板支架50，其中，滑套20可滑动地套设在后轮支架200上，第三转动轴13连接在滑套20的侧面上，在滑套20相对于后轮支架200滑动时，能够带动所述四连杆机构运动，使轮椅架10在展开状态和折叠状态之间变换；锁定机构70用于将轮椅架10锁定在展开状态，具体地，锁定机构通过将滑套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70包括锁定销701、锁定孔702、导向槽703和弹性件704，锁定销701可伸缩地穿设在滑套20上，锁定销701靠近滑套20的端部连接有便于拉动的拉绳(图中未示出)，锁定销701的伸缩方向垂直于滑套20的滑动方向，导向槽703设置在后轮支架200的外壁上并沿后轮支架200的轴向方向延伸，锁定孔702开设在导向槽703的底壁上，在锁定机构70处于锁定状态时，锁定销701的中部保持在导向槽703内，锁定销701的端部插入锁定孔702中，使滑套20与后轮支架200保持锁定，在锁定机构70处于解锁状态时，锁定销701的端部从锁定孔702中脱离，但仍然保持在导向槽703内，滑套20能够相对于后轮支架200滑动，这样设置的好处在于，无论轮椅架10处于展开状态、折叠状态、展开状态至折叠状态的变换过程中、折叠状态至展开状态的变换过程中，均能够防止滑套20沿后轮支架200的轴心线转动，从而增强轮椅架10的稳定性；弹性件704为套设在锁定销701上的压簧，具体地，弹性件704的一端部抵紧在滑套20的内壁上，弹性件704的另一端部抵紧在锁定 销701外壁上的凸缘705上，使得弹性件704具有驱使锁定销701插入锁定孔702的趋势。
扶手40的后端部通过第四转动轴14可转动地设置在靠背支架400上，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，只是采用这种方式时，扶手支架500与靠背支架400的角度难以调节，难以使乘坐者的肘部处于最舒适的状态，并且，第一转动轴11处的转动部件容易对乘坐者的肘部造成夹伤，具有一定的安全隐患；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，限位装置为现有技术，也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的前端部。
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，先将锁定机构解锁，拉动拉绳使锁定销脱离锁定孔，下压靠背支架400，带动滑套20相对于后轮支架200向下滑动，通过第三转动轴13带动所述四连杆机构运动，使座位支架300绕第三转动轴13向后转动，使靠背支架400绕第三转动轴13向前转动，使扶手支架500绕第一转动轴11向后转动，使前轮支架100绕第二转动轴12向后转动，使得座位支架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向后轮支架200靠拢收叠，再将扶手40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。
需要说明的是，本发明提供的可折叠轮椅不能在左右方向上折叠，也即，位于左右两侧的扶手之间的距离是保持恒定的。
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 (14)
- 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动轴转动连接；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动轴转动连接；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动轴转动连接；扶手支架，所述扶手支架的前端部可转动地连接在所述第一转动轴上，所述扶手支架的后端部与所述靠背支架通过第四转动轴转动连接；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动轴、所述第二转动轴、所述第三转动轴和所述第四转动轴组成四连杆机构；其特征在于：所述第三转动轴与所述后轮支架相滑动地设置，所述第三转动轴能够沿所述后轮支架的轴向方向滑动，所述可折叠轮椅还包括用于将所述轮椅架锁定在展开状态的锁定机构。
- 根据权利要求1所述的可折叠轮椅，其特征在于：所述后轮支架上套设有滑套，所述第三转动轴连接在所述滑套的侧面上。
- 根据权利要求2所述的可折叠轮椅，其特征在于：所述锁定机构用于将所述滑套与所述后轮支架的相对位置锁定，所述锁定机构包括可伸缩地设置在所述滑套上的锁定销、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，所述锁定销插入所述锁定孔中，使所述滑套与所述后轮支架的相对位置锁定。
- 根据权利要求3所述的可折叠轮椅，其特征在于：所述锁定机构还包括设置在所述后轮支架外壁上沿所述后轮支架轴向方向延伸的导向槽，所述锁定孔开设在所述导向槽的底壁上，在所述锁定机构处于锁定状态时，所述锁定销有一部分保持在所述导向槽内，在所述锁定机构处于解锁状态时，所述锁定销仍有一部分保持在所述导向槽内，以防止所述滑套沿所述后轮支架的轴心线转动。
- 根据权利要求4所述的可折叠轮椅，其特征在于：所述锁定销的伸缩方向与所述滑套的滑动方向相垂直。
- 根据权利要求3所述的可折叠轮椅，其特征在于：所述锁定机构还包括弹性件，所述弹性件具有驱使所述锁定销插入所述锁定孔的趋势。
- 根据权利要求1所述的可折叠轮椅，其特征在于：所述后轮支架的外壁上开设有沿所述 后轮支架的轴向方向延伸的滑槽，所述第三转动轴的一端部可滑动地设置在所述滑槽内，能够防止所述第三转动轴沿所述后轮支架的轴心线转动。
- 根据权利要求1所述的可折叠轮椅，其特征在于：所述第三转动轴可沿自身轴线方向伸缩的设置，所述锁定机构包括所述第三转动轴、开设在所述滑槽的底壁上的锁定孔，在所述锁定机构处于锁定状态时，所述第三转动轴插入所述锁定孔中，使所述第三转动轴与所述第一转动轴、所述第二转动轴和所述第四转动轴的相对位置锁定。
- 根据权利要求8所述的可折叠轮椅，其特征在于：所述第三转动轴的伸缩方向与所述滑槽的延伸方向相垂直。
- 根据权利要求8所述的可折叠轮椅，其特征在于：所述锁定机构还包括弹性件，所述弹性件具有驱使所述第三转动轴插入所述锁定孔的趋势。
- 根据权利要求1-10中任意一种所述的可折叠轮椅，其特征在于：所述可折叠轮椅还包括扶手和限位装置，所述扶手通过所述第四转动轴可转动地设置在所述靠背支架上，所述限位装置用于限定所述扶手与所述靠背支架之间的夹角。
- 根据权利要求1-10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，所述脚踏板连接架固定在所述前轮支架的前部并向前下方延伸，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，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。
- 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动轴转动连接；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动轴转动连接；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动轴转动连接；扶手支架，所述扶手支架的前端部可转动地连接在所述第一转动轴上，所述扶手支架的后端部与所述靠背支架通过第四转动轴转动连接；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动轴、所述第二转动轴、所述第三转动轴和所述第四转动轴组成四连杆机构；其特征在于：所述第三转动轴与所述后轮支架相滑动地设置，所述第三转动轴能够沿所述后轮支架的轴 向方向滑动，所述可折叠轮椅还包括用于将所述轮椅架锁定在展开状态的锁定机构；所述后轮支架上套设有滑套，所述第三转动轴连接在所述滑套的侧面上；所述锁定机构用于将所述滑套与所述后轮支架的相对位置锁定，所述锁定机构包括可伸缩地设置在所述滑套上的锁定销、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，所述锁定销插入所述锁定孔中，使所述滑套与所述后轮支架的相对位置锁定；所述锁定机构还包括设置在所述后轮支架外壁上沿所述后轮支架轴向方向延伸的导向槽，所述锁定孔开设在所述导向槽的底壁上，在所述锁定机构处于锁定状态时，所述锁定销有一部分保持在所述导向槽内，在所述锁定机构处于解锁状态时，所述锁定销仍有一部分保持在所述导向槽内，以防止所述滑套沿所述后轮支架的轴心线转动；所述锁定销的伸缩方向与所述滑套的滑动方向相垂直；所述锁定机构还包括弹性件，所述弹性件具有驱使所述锁定销插入所述锁定孔的趋势；所述可折叠轮椅还包括扶手和限位装置，所述扶手通过所述第四转动轴可转动地设置在所述靠背支架上，所述限位装置用于限定所述扶手与所述靠背支架之间的夹角；所述轮椅架还包括脚踏板连接架，所述脚踏板连接架固定在所述前轮支架的前部并向前下方延伸，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，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。
- 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动轴转动连接；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动轴转动连接；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动轴转动连接；扶手支架，所述扶手支架的前端部可转动地连接在所述第一转动轴上，所述扶手支架的后端部与所述靠背支架通过第四转动轴转动连接；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动轴、所述第二转动轴、所述第三转动轴和所述第四转动轴组成四连杆机构；其特征在于：所述第三转动轴与所述后轮支架相滑动地设置，所述第三转动轴能够沿所述后轮支架的轴向方向滑动，所述可折叠轮椅还包括用于将所述轮椅架锁定在展开状态的锁定机构；所述后轮支架的外壁上开设有沿所述后轮支架的轴向方向延伸的滑槽，所述第三转动轴的一端部可滑动地设置在所述滑槽内，能够防止所述第三转动轴沿所述后轮支架的轴心线转动；所述第三转动轴可沿自身轴线方向伸缩的设置，所述锁定机构包括所述第三转动轴、开设在所述滑槽的底壁上的锁定孔，在所述锁定机构处于锁定状态时，所述第三转动轴插入所述锁定孔中，使所述第三转动轴与所述第一转动轴、所述第二转动轴和所述第四转动轴的相对位置锁定；所述第三转动轴的伸缩方向与所述滑槽的延伸方向相垂直；所述锁定机构还包括弹性件，所述弹性件具有驱使所述第三转动轴插入所述锁定孔的趋势；所述可折叠轮椅还包括扶手和限位装置，所述扶手通过所述第四转动轴可转动地设置在所述靠背支架上，所述限位装置用于限定所述扶手与所述靠背支架之间的夹角；所述轮椅架还包括脚踏板连接架，所述脚踏板连接架固定在所述前轮支架的前部并向前下方延伸，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，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。
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