CN210447407U

CN210447407U - Foldable electric wheelchair

Info

Publication number: CN210447407U
Application number: CN201921065735.7U
Authority: CN
Inventors: 颜正钦
Original assignee: Suzhou Kaidao Intelligent Equipment Co ltd
Current assignee: Suzhou Kaidao Intelligent Equipment Co ltd
Priority date: 2019-07-09
Filing date: 2019-07-09
Publication date: 2020-05-05
Anticipated expiration: 2029-07-09

Abstract

The utility model discloses a collapsible electronic wheelchair, include: cushion, back, body frame, forearm, spacing and be used for carrying out folding locking or the folding adjusting device of unblock to the wheelchair, the cushion pass through the seat joint with back swing joint. In this way, the utility model relates to a collapsible electronic wheelchair has broken through the structure and the folding mode of traditional wheelchair, utilizes body frame and forearm isotructure to improve stability, the security of wheelchair to utilize folding adjusting device etc. to accomplish the work of folding locking and unblock, convenience of customers's folding and use more.

Description

Foldable electric wheelchair

Technical Field

The utility model relates to a wheelchair and accessory field especially relate to a collapsible electronic wheelchair.

Background

The wheelchair is a walking tool and a common medical rehabilitation instrument for physically disabled persons and persons with mobility disabilities, and is also a user for doing physical exercise and participating in social activities. The wheelchair can be folded to facilitate the use of the user.

However, when the existing wheelchair is folded and unfolded, the wheelchair can be folded and unfolded only by two hands, the operation is inconvenient, the existing wheelchair on the market still has problems in stability and bearing capacity, and in addition, the controller and the battery of the existing wheelchair cannot be directly connected due to the limitation of the wheelchair structure, so that the safety problem exists.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the main technical problem who solves provides a folding electronic wheelchair, has advantages such as reliable performance height, convenient to use, folding effectual, has extensive market prospect in the application and the popularization of wheelchair and accessory simultaneously.

In order to solve the technical problem, the utility model discloses a technical scheme be:

there is provided a foldable electric wheelchair comprising: a cushion, a backrest, a main frame, a forearm crossed with the main frame and a folding adjusting device for folding, locking or unlocking the wheelchair,

the cushion with back swing joint, the bottom of back through folding adjusting device with forearm swing joint, two be provided with spacing between the forearm, the upper portion of body frame set up in the bottom surface of cushion, the body frame activity set up in on the spacing, the forearm lower extreme with the both sides of body frame are provided with the gyro wheel.

In a preferred embodiment of the present invention, a support is disposed between two of the forearms, a pedal is disposed on the support, the pedal is turned over along the support, a handrail is movably disposed on the backrest, a handrail adjusting device for adjusting the handrail and the backrest is disposed between the cushion and the handrail, a battery and a controller connected to the battery are disposed in the main frame, and the controller is connected to a control handle disposed on the handrail.

In a preferred embodiment of the present invention, the armrest adjustment device includes an air spring, a fixing seat, a clamping strip, a pressing handle, and a reset block, the cushion side is provided with the fixing seat, the lower end of the fixing seat is provided with the clamping strip, the upper end of the air spring is movably connected with the armrest, the lower end of the air spring is movably connected with the fixing seat, the pressing handle is movably arranged on the air spring, the bottom surface of the pressing handle is provided with the reset block, the reset block is in contact with the air spring and pushes the upper portion of the pressing handle to move outwards to reset, and the lower end of the pressing handle is provided with a hook connected with the clamping strip in a matching manner.

In a preferred embodiment of the present invention, the folding adjustment device comprises a first adjustment device and a second adjustment device, the cushion is movably connected to the backrest through the first adjustment device, and the forearm is movably connected to the backrest through the second adjustment device.

In a preferred embodiment of the present invention, the first adjusting device includes a frame locking member, a frame unlocking pin, an outer pin holder, an inner pin holder, an unlocking spring, a fixing head, and a connection stay cord, the frame locking member is disposed in both sides of the cushion, the outer pin holder is disposed in both sides of the backrest, the inner pin holder is disposed in the outer pin holder, both ends of the connection stay cord are disposed with the fixing head, the fixing head passes the outer pin holder with the inner pin holder with the frame unlocking pin is connected, the frame unlocking pin with the frame locking member is a movable connection, the inner pin holder with the unlocking spring for pushing the frame unlocking pin is disposed between the fixing heads.

In a preferred embodiment of the present invention, the second adjusting device includes a first fixing member, a second fixing member, an unlocking elastic pin, a pushing block, a button, a resilient spring, and a locking elastic pin, the first fixing member is disposed on the lower portion of the backrest, the second fixing member is disposed on the upper portion of the forearm, the first fixing member is provided with a movable groove and a locking hole communicating with the movable groove, the button is disposed in the movable groove, the movable groove is provided with the resilient spring between the buttons, one end of the unlocking elastic pin is connected with the button, the other end of the unlocking elastic pin passes through the movable groove and is connected with the pushing block, one end of the locking elastic pin is disposed in the second fixing member through the resilient spring, and the other end of the locking elastic pin is movably connected with the locking hole.

In a preferred embodiment of the present invention, the forearm is movably connected to the bottom of the backrest through the folding adjustment device, the folding adjustment device comprises a housing, a rotating shaft, an unfolding locking unit and a folding locking unit, the bottom of the backrest is connected to the rotating shaft through the rotating shaft, the housing is disposed at the lower end of the backrest, the housing is connected to the rotating shaft, and the unfolding locking unit and the folding locking unit are disposed on the housing.

In a preferred embodiment of the present invention, the unfolding locking unit includes an unlocking groove, an unlocking stay cord, a limiting hole, a spring, and a fixing pin, the unlocking groove is disposed on the housing, the front arm end is provided with the limiting hole, the fixing pin passes through the limiting hole and is movably connected to the unlocking groove, the limiting hole is provided with a spring for resetting the fixing pin, and the unlocking stay cord drives the fixing pin to move back and forth.

The utility model discloses a preferred embodiment, the front end activity of fixed pin set up in the unblock inslot, the rear end of fixed pin outburst in spacing hole, just the rear end of fixed pin is connected with the stopper, the both ends of unblock stay cord respectively with the stopper is connected, be provided with the draw-in groove on the fixed pin, the spring set up in the draw-in groove.

In a preferred embodiment of the present invention, the folding locking unit includes a locking button, a locking groove, a locking pin, a spring, and the locking groove is connected with the fixing pin, the locking groove is disposed on the housing, the locking groove is provided with a pushing pin, a pair of the locking pin, the locking pin moves a spacing block, the outer end of the locking pin is connected with a locking button pushing its back and forth movement, the spring is disposed between the locking button and the block for resetting the locking pin.

The utility model has the advantages that: the structure and the folding mode of the traditional wheelchair are broken through, the dead point is formed by the limit positions of the four connecting rods of the crank rocker, the mechanism is simplified, the weight is reduced, the optimal stable effect of the structure is achieved, the folding locking and unlocking work is completed by the folding adjusting device and the like, and the folding and the use of a user are more convenient.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained without inventive work, wherein:

FIG. 1 is a schematic axial view of a first embodiment of a foldable electric wheelchair of the present invention;

FIG. 2 is a schematic perspective view of a first embodiment of a foldable electric wheelchair according to the present invention;

FIG. 3 is a schematic view of the armrest adjustment mechanism of a preferred embodiment of the foldable electric wheelchair of the present invention;

FIG. 4 is a schematic structural view of an unfolding locking unit of a foldable electric wheelchair according to an embodiment of the present invention;

FIG. 5 is a schematic structural view of a folding locking unit of a foldable electric wheelchair according to an embodiment of the present invention;

FIG. 6 is a schematic structural view of a foldable electric wheelchair according to a first embodiment of the present invention;

FIG. 7 is a schematic axial view of a second embodiment of a foldable electric wheelchair of the present invention;

FIG. 8 is a schematic structural view of a first adjusting device of a second embodiment of the foldable electric wheelchair of the present invention;

FIG. 9 is a schematic structural view of a first fixing member of a second adjusting device of a second embodiment of a foldable electric wheelchair according to the present invention;

FIG. 10 is a schematic structural view of a second fixing member of a second adjusting device of a second embodiment of a foldable electric wheelchair according to the present invention;

FIG. 11 is a schematic view of a foldable electric wheelchair according to an embodiment of the present invention in a folded state;

fig. 12 is a schematic structural view of the armrest in the foldable electric wheelchair 5.2 of the present invention;

fig. 13 is a schematic sectional view of the armrest of the foldable electric wheelchair 5.2 of the present invention;

fig. 14 is a schematic structural view of an anti-roll wheel in the foldable electric wheelchair of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely below, and it should be apparent that the described embodiments are only some embodiments of the present invention, but not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

Referring to fig. 1-14, an embodiment of the present invention includes:

a foldable electric wheelchair comprising: cushion 1, back 2, body frame 3, forearm 4, postbrachium 5, spacing 6 and be used for carrying out folding locking or folding adjusting device 7 of unblock to the wheelchair, the cushion pass through seat joint 9 or folding adjusting device with back swing joint. The lower fixing frame of the cushion, the fixing frame on the backrest, the main frame and the forearms form a crank rocker four-bar mechanism of the wheelchair, and the four-bar mechanism can mutually and movably rotate so as to complete the folding and unfolding of the wheelchair.

1) About main frame and spacing

The back with forearm swing joint, two be provided with spacing between the forearm, the upper portion of body frame (the body frame can be square tube structure) set up in the bottom surface of cushion, just the tip of body frame can not stand out in the cushion, and convenience of customers takes. When the wheelchair expandes, the body frame drives the cushion motion and opens until the body frame is in on the spacing, spacing bearing capacity and the stability of wheelchair can be improved, prevent that the user from collapsing downwards when sitting, the lower part of body frame be provided with the body frame is linked together the postbrachium, the forearm lower extreme with the both sides of body frame are provided with gyro wheel 8 for the pipeline of drive and control gyro wheel all sets up in forearm and postbrachium, not only can let more clean and tidy of whole wheelchair, can stop the potential safety hazard that the pipeline exposes the cause moreover.

2) About a roller

The roller (mainly the front wheel) can adopt a shock-absorbing wheel or a shock-absorbing wheel without a wheel hub.

2.1) the wheel of moving away to avoid possible earthquakes includes wheel, spring, yoke, goes up the seat of moving away to avoid possible earthquakes, the seat of moving away to avoid possible earthquakes down, the yoke set up in the bottom surface of the seat of moving away to avoid possible earthquakes down, the wheel activity sets up between two yokes, go up the seat of moving away to avoid possible earthquakes with the seat of moving away to avoid possible earthquakes down passes through axle swing joint, the bottom of going up the seat of moving away to avoid possible earthquakes is provided with first recess, the top of the seat of moving away to avoid possible earthquakes down is provided with the second recess, first recess with the spring groove that is used for placing the spring of moving away to avoid possible earthquakes has been constituteed to the second recess, the.

When meetting the uneven road of fluctuation, the front wheel is raised and is driven down the ascending compression spring of moving away to avoid possible earthquakes of seat of moving away to avoid possible earthquakes through the yoke, the top surface of the seat of moving away to avoid possible earthquakes down forms a contained angle with the last groove face of third recess, can be spacing to the seat of moving away to avoid possible earthquakes down, when the top surface of the seat of moving away to avoid possible earthquakes down runs into the top surface of third recess, the maximum stroke of moving away to avoid possible earthquakes has been reached promptly, it is excessive to prevent the seat of moving away to avoid possible earthquakes down, the performance of.

2.2) the wheel hub-free shock absorbing wheel comprises a shock absorbing wheel seat, a shock absorbing spring, a left wheel hub cover plate, a right wheel hub cover plate, a middle sliding ring, a sliding bearing, a bearing fixing ring and a tire.

The top surface of the shock-absorbing wheel seat is provided with a tire connecting shaft, the lower part of the shock-absorbing wheel seat is provided with an upper spring clamping groove, and two side walls of the shock-absorbing wheel seat (namely two sides of the spring clamping groove) are respectively provided with a limiting groove. The wheel hub left side apron with the top surface of wheel hub right side apron with the spacing groove cooperatees, it is right the wheel hub left side apron with the wheel hub right side apron carries out the spacing of upward movement, and when the tire drove the apron upwards, the spring of moving away to avoid possible earthquakes played the effect of buffering, and the last spacing face of spacing groove is spacing with the top surface contact of apron simultaneously, prevents apron and tire excessive motion that makes progress, improves the stability and the travelling comfort of wheel of moving away to avoid possible earthquakes.

The top of the left cover plate of the wheel hub is provided with a left groove body, the top of the right cover plate of the wheel hub is provided with a right groove body, the left groove body and the right groove body form a lower spring clamping groove matched with the upper spring clamping groove, and the shock-absorbing spring is arranged in the upper spring clamping groove and the lower spring clamping groove. In order to prevent the spring from being separated, spring clamping blocks can be arranged on the top surface of the upper spring clamping groove and the bottom surface of the lower spring clamping groove, and the stability of the whole structure is improved.

The tire set up in on the outer wall of bearing retainer plate, be provided with the bearing jack on the bearing retainer plate, slide bearing set up in the axle bell and spigot hole to axial rotation in the bearing jack, be provided with the sliding tray on the outer lane wall of well putting the sliding tray, the bearing retainer plate passes through slide bearing edge the sliding tray rotates, two sides about putting the sliding tray be provided with the left apron of wheel hub with the apron groove of the right side cooperation of wheel hub is connected. After the assembly is completed, the middle-arranged sliding ring is positioned in the inner ring of the bearing fixing ring, the tire is arranged on the outer ring of the bearing fixing ring, when the tire rolls on the bottom surface, the tire drives the bearing fixing ring to rotate, and the bearing fixing ring rotates on the middle-arranged sliding ring through a sliding bearing, so that the smooth operation of the wheel hub-free shock absorbing wheel is realized.

2.3) an anti-tip wheel structure can be arranged on the transmission shaft (especially the rear wheel) of each roller, the anti-tip wheel structure comprises a wheel, an anti-tip wheel bracket, a seat body and a wheel unlocking device, the seat body is arranged on the transmission shaft, a groove is arranged on the seat body, one end of the anti-tip wheel bracket is movably arranged in the groove in parallel through a pin shaft and rotates axially in the groove, and the side wall of the other end is provided with the wheel. The wheel unlocking device is arranged on the seat body and is matched with the seat body to lock or unlock the anti-roll wheel support.

The wheel unlocking device can adopt a pull type unlocking device or a press type unlocking device.

The pull type unlocking device comprises a pull pin, a fixed shell and a locking block, wherein the fixed shell is arranged on the seat body, a movable groove is formed in the fixed shell, the lower portion of the pull pin penetrates through the movable groove to be connected with the locking block, a spring for pushing the locking block to reset downwards is arranged between the movable groove and the locking block, and a locking through hole which is matched with the locking block to lock or unlock is formed in the anti-tip wheel support (or locking through holes which are mutually communicated are formed in the seat body and the anti-tip wheel support).

When the anti-roll wheel needs to be used, the pull pin is pulled upwards, the pull pin drives the locking block to move upwards until the pull pin is separated from the locking through hole in the anti-roll wheel support, the anti-roll wheel is unlocked, and the support can be unfolded for 90 degrees to be used. When the anti-tilt wheel needs to be used, the anti-tilt wheel bracket can be folded inwards by 90 degrees, and after the anti-tilt wheel bracket is folded in place, the locking block is aligned and inserted into the locking through hole, so that the anti-tilt wheel is locked, and the volume after folding is reduced.

3) Regarding the main frame, battery unit and controller unit

The body frame pass through the body frame fixing base with the cushion is connected, be provided with battery unit and controller unit in the body frame, the battery with the controller carries out the direct electric connection of plug-in through battery plug and control jack.

The battery unit includes battery housing, the spacing seat of battery, carries pull groove, battery body, battery plug, guide holder, the battery is fixed set up in the battery housing, the one end of battery plug with the battery is connected, and the other end passes battery housing, the guide holder set up in battery housing's bottom surface, just the guide holder encircles and sets up in around battery plug, spacing seat set up in battery housing's top surface, carry pull groove set up in on the spacing seat.

The cross sectional area of spacing seat is greater than the cross sectional area of wheelchair support frame, be provided with on the spacing seat with the sealing washer that wheelchair support frame open-top is connected can effectually prevent like this that outside debris from entering into damage battery and controller in the wheelchair support frame, prolongs the life of battery and controller, improves the security, and when the battery need charge or maintain, the user directly holds and carries the pull-up groove and carry and draw simultaneously, both can extract the battery, convenience of customers' use.

The controller unit comprises a controller shell 710, a controller jack and a guide groove, the controller is arranged in the controller shell, the lower portion of the controller jack is connected to the controller, the upper portion of the controller jack is connected with the battery plug in a plugging mode, the guide groove is formed in the top surface of the controller shell and surrounds the controller jack, the guide groove and the guide seat are matched with each other to conduct guiding and positioning, the battery can be connected with the controller more accurately and rapidly, damage to equipment parts due to insertion position deviation is prevented, and a control connector connected with the controller is arranged on the bottom surface of the controller shell.

The controller shell is connected with the wheelchair supporting frame through the bolts, so that the controller shell can be stably fixed in the wheelchair supporting frame, when the controller needs to be maintained and detected, the bottom cover can be opened, then the bolts and other fasteners are removed, and the controller shell can be easily taken out.

The battery unit is movably arranged in the wheelchair supporting frame, and the controller shell is detachably connected with the wheelchair supporting frame. The bottom of body frame is provided with a bottom 711, the bottom with the support frame is for dismantling the connection, can effectually prevent like this that outside debris from entering into damage battery and controller in the wheelchair support frame, prolongs the life of battery and controller, improves the security.

And the side wall of the main frame is provided with a wire hole for connecting an external connecting wire with the controller connector. The wire guide hole is connected with a connecting frame used for installing and fixing the idler wheel, and an external connecting wire penetrates through the connecting frame to be connected with the controller joint.

4) About pedals

Two be provided with the support of arc structure between the forearm, be provided with the mounting bracket on the support, be provided with the cell body of laminating mutually with the support on the mounting bracket, the footboard sets up on U type frame, the both sides of U type frame bottom surface are provided with the footboard link, the footboard link is U type structure, the tip card of mounting bracket is in the opening of footboard link to couple together mounting bracket and footboard link through the bolt, make U type frame can round bolt axial rotation, when using, can open the footboard, when folding, can overturn the footboard, in order to reduce the volume after the wheelchair is folded.

5) About the armrest

Be provided with handrail 10 on the back, be provided with on the handrail with the control handle that the controller is connected, the cushion with be provided with the handrail adjusting device who is used for adjusting handrail and back between the handrail, the handrail with the back is swing joint all the time, so only need rely on handrail adjusting device just can carry out fixed and spacing of linkage to back and handrail simultaneously, the folding and the expansion of help back and handrail, and the operation is convenient and fast more.

The wheelchair comprises armrests and is characterized in that a controller used for controlling the wheelchair is arranged in the armrests, a control panel, a control button and a rocker are arranged on the top surfaces of the armrests, the rocker and the control button are connected with the controller, the control panel, the control button and the rocker can be arranged on one armrest at the same time, and the control panel, the control button and the rocker can also be arranged on two armrests separately, so that different use requirements are met. The lower part of the rocker is directly arranged in the handrail, and the control frame is not additionally arranged on the handrail or on the side edge, so that the control frame can be effectively prevented from being impacted and falling off in the process of storage or running, the probability of error control caused by the fact that the rocker falls off due to contact of wheels, pedestrians and the like is reduced, and the safety and the practicability of the wheelchair are greatly improved.

The armrest includes, but is not limited to, two structures:

5.1) handrail adjusting device includes gas spring 11 (can also adopt other elasticity or tensile equipment), fixing base 12, card strip 13, press handle 14, reset block 15, reset block has certain elasticity, and it can adopt materials such as rubber to make and form.

The cushion both sides side all is provided with the bottom of handrail the fixing base, the air spring with the fixing base is connected through the bolt, and the tip and the fixing base of air spring can be around bolt rotary motion, the lower extreme of fixing base is provided with the card strip.

The both sides of pressing the handle are provided with two pterygoid laminas perpendicularly, the pterygoid lamina activity set up in on the air spring, the bottom surface of pressing the handle is provided with the reset block, the reset block with the air spring contacts and promotes the upper portion of pressing the handle and outwards moves and reset, the lower extreme of pressing the handle be provided with trip 16 that the card strip cooperation is connected.

Folding, expand the wheelchair, perhaps when in order to satisfy user's different modes of taking, just need adjust the position of handrail and back, can press the upper portion of pressing the handle earlier, make and press the handle oppression reset block, utilize the lever principle to make the lower extreme perk of pressing the handle simultaneously, the position of handrail has been adjusted to the push-and-pull air spring, then loosen and press the handle, the reset block outwards promotes the upper portion of pressing the handle, make the lower part inward movement of pressing the handle simultaneously, thereby make the trip card of pressing the handle lower extreme on the gib of fixing base, accomplish the fixed of handrail and back.

5.2) the armrest adjusting device comprises a first sliding assembly 401, a second sliding assembly 402, an armrest connecting rod 403, an armrest connecting seat 404, a sliding transition piece 405 and an armrest unlocking button assembly 406, wherein the armrest is arranged on the top surface of the armrest connecting rod, the armrest connecting seat is arranged on the bottom surface of the armrest connecting rod, the sliding transition piece is arranged at an opening at the top of the first sliding assembly, the upper part of the second sliding assembly is connected with the armrest connecting seat through a locknut, and the lower part of the second sliding assembly penetrates through the sliding transition piece and is movably arranged in the first sliding assembly. The armrest unlocking button assembly matched with the second sliding assembly for limiting is arranged on the first sliding assembly, and the bottom of the first sliding assembly is connected with the cushion through an armrest lower peripheral sleeve.

The armrest unlocking button assembly comprises an armrest unlocking seat 4061, an armrest unlocking pin 4062, an unlocking button 4063, an armrest unlocking spring 4064 and an armrest limiting fixture block 4065, wherein the diameter of the limiting fixture block is larger than that of the armrest unlocking pin, so that the limiting fixture block can be better matched with an armrest limiting block to fix the armrest at a corresponding position, and the position of the armrest is convenient to adjust.

The armrest unlocking seat is arranged on the first sliding assembly, and an armrest unlocking spring used for a reset button is arranged in the armrest connecting seat. The second sliding assembly is provided with a sliding groove 407, two ends of the sliding groove are respectively provided with a limiting clamping groove 408, the limiting clamping grooves are communicated with the sliding groove, and the diameter of each limiting clamping groove is larger than that of the sliding groove.

The first sliding assembly, the second sliding assembly and the sliding transition piece are provided with through holes for a handrail unlocking pin to pass through, one end of the handrail unlocking pin is connected with the unlocking button, and the other end of the handrail unlocking pin passes through the handrail unlocking seat, the through holes and the sliding groove (or the limiting clamping groove) and then is connected with the limiting clamping block. The armrest unlocking pin moves back and forth in the sliding groove, and the limiting clamping block is movably connected with the limiting groove.

When the armrest mechanism needs to be unlocked, the unlocking button is pressed down first, the button pushes the armrest unlocking pin to move forwards, so that the limiting clamping block is driven to be separated from the limiting clamping groove above the sliding groove, the armrest can be pulled upwards at the moment, the second sliding assembly can be pulled out from the first sliding assembly until the armrest unlocking pin moves into the limiting clamping groove below the sliding groove, the limiting clamping block does not stop from the sliding groove and falls into the limiting clamping groove again, and the armrest is adjusted and locked.

6) About folding adjusting devices

Detailed description of the preferred embodiment

The cushion pass through seat joint 9 with back swing joint the forearm passes through folding adjusting device 7 with during back swing joint, folding adjusting device includes shell, pivot 71, expandes locking unit and folding locking unit, the bottom of back is passed through the pivot with forearm swivelling joint, the shell includes first casing 72 and second casing 73, first casing shell set up in the lower extreme of back, the second casing set up in the upper end of forearm, first casing with the second casing set up in the both ends of pivot, expand locking unit with folding locking unit set up in on the shell.

The unfolding locking unit comprises an unlocking groove 701, an unlocking stay cord 702, a limiting hole 703, an unlocking spring 704 and a fixing pin 705, wherein the unlocking groove is formed in the first shell, the limiting hole is formed in the second shell, the front end of the fixing pin penetrates through the limiting hole and is movably connected with the unlocking groove, a clamping groove is formed in the fixing pin, the limiting hole and the clamping groove are used for resetting the unlocking spring of the fixing pin, the rear end of the fixing pin protrudes out of the limiting hole, the rear end of the fixing pin is connected with a limiting block, and two ends of the unlocking stay cord are connected with the limiting block respectively and drive the fixing pin to move back and forth.

After the wheelchair is folded, the unlocking pull rope can be clamped between the backrest and the main frame, so that a folding locking unit is added on the shell, the folding locking unit can be arranged on the shells on two sides of the wheelchair and can also be arranged on the shell on one side of the wheelchair, the structure of the wheelchair can be simplified, and a user can lock and unlock the wheelchair by only one hand, so that the wheelchair is more convenient for the user to operate.

Folding locking unit includes locking button 706, locking groove 707, stop pin 708, locking spring 709, with the fixed pin cooperation is connected the locking groove set up in on the shell, locking inslot be provided with the stop pin and to the stop pin carries out the spacing fixture block 712 of motion, the inner of stop pin is connected with a lug, the diameter of lug is greater than the diameter of stop pin prevents that the lug from excessively being pushed in by the fixed pin, the outer end of stop pin is connected with the locking button who promotes its seesaw, lug direct contact promotes the fixed pin for reset the stop pin the locking spring set up in the locking button with between the fixture block.

During the folding vehicle, pulling unblock stay cord, the fixed pin oppresses the spring and is retracted to spacing hole direction for the fixed pin is deviate from the unblock groove, four-bar linkage unblock, upwards lift the cushion and overturn the back backward, the cushion drives the body frame and upwards moves forward, the back drives the forearm and overturns backward, and it is rotatory to drive the shell, when four-bar linkage and shell rotation finish to the folding locking position, the fixed pin receives the thrust of spring outwards ejecting and insert the locking groove in, lock the car of having folded.

When the vehicle is unfolded, the locking button is pressed inwards, the locking pin retracts inwards and pushes the fixing pin out of the locking groove, the four-bar mechanism is unlocked, all joints are in an unlocking movable state again, the whole vehicle can be pulled forwards to the unfolding locking position, the fixing pin is aligned again and inserted into the unlocking groove, and the unfolded vehicle is unfolded and locked.

Detailed description of the invention

The cushion with the forearm all passes through folding adjusting device with during back swing joint, folding adjusting device includes first adjusting device 20 and second adjusting device 30, the cushion passes through first adjusting device with back swing joint, first adjusting device's position is leaned on like this, makes things convenient for old man or the inconvenient people pulling stay cord of action to unblock, the forearm passes through second adjusting device with back swing joint.

The first adjusting device comprises a frame locking piece 201, a frame unlocking pin 202, an outer pin base 203, an inner pin base 204, an unlocking spring 205, a fixed head 206 and a connecting pull rope 207, the frame locking piece is arranged at two sides of the cushion, the frame locking piece is provided with a connecting hole matched with the frame unlocking pin, the outer pin base is arranged at two sides of the backrest, the inner pin base is arranged in the outer pin base and can be used for reducing the abrasion on the pin base when the unlocking pin moves back and forth, the two ends of the connecting pull rope are provided with the fixed heads, the end part of the fixed head close to the pull rope is provided with a stop block for limiting, the fixed head and the unlocking pin are prevented from being separated from the pin base under the action of the tensioning force of the spring, the fixed head penetrates through the outer pin base and the inner pin base and is connected with the frame unlocking pin, and the frame unlocking pin is movably connected with the connecting hole, an unlocking spring used for pushing the vehicle frame to unlock the pin is arranged between the inner pin seat and the fixed head.

The second adjusting device comprises a first fixing piece 301, a second fixing piece 302, an unlocking elastic pin 303, a pushing block 304, a button 305, a rebound spring 306 and a locking elastic pin 307, wherein the first fixing piece is arranged at the lower part of the backrest, the second fixing piece is arranged at the upper part of the forearm, and the first fixing piece and the second fixing piece are rotatably connected (can be connected through a rotating shaft). Be provided with movable groove 308 on the first mounting and with the locking hole 309 that the movable groove communicates, just the movable groove with the junction of locking groove is provided with the spacing fixture block that is used for spacing ejector pad, prevents to press the whole activity groove that pops out of button, the button set up in the activity inslot, just the movable groove with be provided with between the button springback spring, the one end of unblock bullet round pin with the button is connected, the other end pass the activity groove with the ejector pad is connected, the one end of locking bullet round pin is passed through springback spring set up in the second mounting, the other end with locking hole swing joint.

When needing folding wheelchair, the pulling connect the stay cord, the frame is separated the lockpin and is driven the frame and is separated the lockpin and indent in the inside key seat under the pulling force of connecting the stay cord, until the frame is separated the lockpin thoroughly the connecting hole, first step unblock is accomplished to back and seat, then rotates the back backward to first mounting is rotatory, until the alignment of the locking hole on the first mounting locks the bullet round pin, locks the bullet round pin and pops out forward under the effect of spring and block in the locking hole, and at this moment, the whole car of wheelchair has just accomplished folding locking.

When the wheelchair needs to be unfolded, the button is pressed down, the push block is pushed into the locking groove under the action of the button and the unlocking elastic pin until the locking elastic pin is completely pushed out of the locking groove by the push block, the front arm and the backrest can be unlocked movably, the backrest is rotated to enable the frame unlocking pin to move to the position of the connecting hole, and the frame unlocking pin is bounced into the connecting hole under the action of the spring to complete unfolding and locking of the wheelchair.

When the wheelchair is folded and the first-step unlocking of the backrest and the seat is completed, the connecting pull rope is pulled, the frame unlocking pin drives the frame unlocking pin to retract into the inner pin seat under the pulling force of the connecting pull rope until the frame unlocking pin is completely separated from the connecting hole, and at the moment, the backrest and the seat complete the first-step unlocking. When the wheelchair is unfolded and the backrest is rotated to enable the unlocking pin to move to the position of the connecting hole, the unlocking pin of the frame bounces into the connecting hole under the action of the spring, and the seat cushion and the backrest are locked.

The utility model relates to a collapsible electronic wheelchair's beneficial effect is: the structure and the folding mode of the traditional wheelchair are broken through, the dead point is formed by the limit positions of the four connecting rods of the crank rocker, the mechanism is simplified, the weight is reduced, the optimal stable effect of the structure is achieved, the folding locking and unlocking work is completed by the folding adjusting device and the like, and the folding and the use of a user are more convenient. The above only is the embodiment of the present invention, not limiting the patent scope of the present invention, all of which utilize the equivalent structure or equivalent flow transformation made by the content of the specification of the present invention, or directly or indirectly applied to other related technical fields, all included in the same way in the patent protection scope of the present invention.

Claims

1. A foldable electric wheelchair, comprising: a cushion, a backrest, a main frame, a forearm crossed with the main frame and a folding adjusting device for folding, locking or unlocking the wheelchair,

2. The foldable electric wheelchair as claimed in claim 1, wherein a support is provided between the two forearms, a pedal is provided on the support, the pedal is turned over along the support, armrests are movably provided on the backrest, an armrest adjusting device for adjusting the armrests and the backrest is provided between the seat cushion and the armrests, a battery unit and a controller unit connected with the battery are provided in the main frame, and the controller unit is connected with a control handle provided on the armrests.

3. The foldable electric wheelchair as claimed in claim 2, wherein the armrest adjustment device comprises an air spring, a fixed seat, a clamping strip, a pressing handle and a reset block, the fixed seat is arranged on the side edge of the cushion, the clamping strip is arranged at the lower end of the fixed seat, the upper end of the air spring is movably connected with the armrest, the lower end of the air spring is movably connected with the fixed seat, the pressing handle is movably arranged on the air spring, the reset block is arranged on the bottom surface of the pressing handle, the reset block is in contact with the air spring and pushes the upper portion of the pressing handle to move outwards for resetting, and a clamping hook in fit connection with the clamping strip is arranged at the lower end of the pressing handle.

4. A foldable electric wheelchair in accordance with any one of claims 1-3, wherein the folding adjustment means comprises a first adjustment means by which the seat cushion is movably connected to the backrest and a second adjustment means by which the forearm is movably connected to the backrest.

5. The foldable electric wheelchair as claimed in claim 4, wherein the first adjusting device comprises a frame locking member, a frame unlocking pin, an outer pin seat, an inner pin seat, an unlocking spring, a fixing head and a connecting pull rope, the frame locking member is arranged on two sides of the seat cushion, the outer pin seat is arranged on two sides of the backrest, the inner pin seat is arranged in the outer pin seat, the fixing head is arranged on two ends of the connecting pull rope, the fixing head penetrates through the outer pin seat and the inner pin seat to be connected with the frame unlocking pin, the frame unlocking pin is movably connected with the frame locking member, and the unlocking spring for pushing the frame unlocking pin is arranged between the inner pin seat and the fixing head.

6. The foldable electric wheelchair as claimed in claim 5, wherein the second adjusting device comprises a first fixing member, a second fixing member, an unlocking elastic pin, a pushing block, a button, a rebound spring and a locking elastic pin, the first fixing member is disposed at the lower part of the backrest, the second fixing member is disposed at the upper part of the forearm, the first fixing member is provided with a movable groove and a locking hole communicated with the movable groove, the button is disposed in the movable groove, the rebound spring is disposed between the movable groove and the button, one end of the unlocking elastic pin is connected with the button, the other end of the unlocking elastic pin passes through the movable groove and is connected with the pushing block, one end of the locking elastic pin is disposed in the second fixing member through the rebound spring, and the other end of the locking elastic pin is movably connected with the locking hole.

7. A foldable electric wheelchair, as claimed in any one of claims 1 to 3, wherein the forearm is movably connected to the bottom of the backrest by means of the folding adjustment device, the folding adjustment device comprises a housing, a rotating shaft, an unfolding locking unit and a folding locking unit, the bottom end of the backrest is rotatably connected to the forearm by means of the rotating shaft, the housing is disposed at the lower end of the backrest and is connected to the rotating shaft, and the unfolding locking unit and the folding locking unit are disposed on the housing.

8. The foldable electric wheelchair as claimed in claim 7, wherein the unfolding locking unit comprises an unlocking groove, an unlocking stay cord, a limiting hole, a spring and a fixing pin, the unlocking groove is arranged on the shell, the limiting hole is arranged at the end of the front arm, the fixing pin passes through the limiting hole and is movably connected with the unlocking groove, the spring for resetting the fixing pin is arranged between the limiting hole and the fixing pin, and the unlocking stay cord drives the two fixing pins to move back and forth.

9. The foldable electric wheelchair as claimed in claim 8, wherein the front end of the fixing pin is movably disposed in the unlocking groove, the rear end of the fixing pin protrudes out of the limiting hole, the rear end of the fixing pin is connected with a limiting block, two ends of the unlocking pull rope are respectively connected with the limiting block, the fixing pin is provided with a clamping groove, and the spring is disposed in the clamping groove.

10. The foldable electric wheelchair as claimed in claim 8, wherein the foldable locking unit comprises a locking button, a locking groove, a locking pin and a spring, the locking groove connected with the fixing pin is disposed on the housing, the locking groove is provided with a locking pin for pushing the fixing pin and a block for limiting the movement of the locking pin, the outer end of the locking pin is connected with a locking button for pushing the locking pin to move back and forth, and the spring for resetting the locking pin is disposed between the locking button and the block.