CN108904161A - A kind of wheelchair - Google Patents

Abstract

The present invention provides a kind of wheelchairs, including seat, backrest, chassis overhang, folding rack, fold grillage and armrest system, the top of the folding rack is articulated in the rear lateral portion of the seat, and the top of the folding rack is connected with the bottom of the backrest, the bottom end of the folding rack is connected with the chassis overhang, the top for folding grillage is articulated with the seat, the bottom end for folding grillage is articulated with the chassis overhang, and the armrest system is foldably connected on the seat.The folding of the wheelchair is more convenient, and folded structure is more compact, is conducive to reduce occupied space.

Description

A kind of wheelchair

Technical field

The present invention relates to wheelchair technical field more particularly to a kind of folding wheelchairs.

Background technique

Wheelchair is the important tool of rehabilitation, and wheelchair is the walking-replacing tool of limbs the disabled and people with mobility problems, can be convenient They carry out physical exercise and participate in social activities.There are some wheelchairs that there is foldable structure at present, when not in use can with facilitating Folding placement is enough carried out, however, these wheelchairs are not convenient enough when being folded, and structure after folding is still not tight enough It gathers.

Summary of the invention

Based on this, the purpose of the present invention is to provide a kind of wheelchair, the folding of the wheelchair is more convenient, and folded knot Structure is more compact, is conducive to reduce occupied space.

The technical scheme is that：A kind of wheelchair, including seat, backrest, chassis overhang, folding rack, folding grillage And armrest system, the top of the folding rack are articulated in the rear lateral portion of the seat, and the top of the folding rack with The bottom of the backrest is connected, and the bottom end of the folding rack is connected with the chassis overhang, the top for folding grillage End is articulated with the seat, and the bottom end for folding grillage is articulated with the chassis overhang, and the armrest system is foldable Ground is connected on the seat.

Optionally, the folding rack includes upper folding strut and lower folding strut, the upper top pivot for folding strut It is connected to the rear lateral portion of seat, and the upper top for folding strut is fixedly connected with the bottom of the backrest, the upper folding branch The bottom end of bar is articulated with the lower top for folding strut, and the lower bottom end for folding strut is fixedly supported on the chassis branch On frame.

Optionally, the lower folding strut includes main rod body, the first supporting plate and the second supporting plate, first supporting plate and described Second supporting plate is set to the top of the main rod body, and first supporting plate and second supporting plate are arranged in parallel, described Mounting groove is formed between first supporting plate and second supporting plate, the upper folding strut protrudes into the mounting groove and the lower folding Folded strut is articulated.

Optionally, bolt device being installed on first supporting plate, the bolt device includes latch body, and described One supporting plate is equipped with perforation, and the upper folding strut is equipped with engaging recess, and the latch body is telescopically inserted in described wear In hole and the engaging recess.

Optionally, the upper strut that folds is equipped with the snap-gauge for extending along direction setting, first supporting plate and described the Card column is connected between two supporting plates, and the card column is located at the side of the main rod body, the card column is perpendicular to the snap-gauge institute Plane, the lower folding strut or the card column be connected with fastener, and the fastener is and being fastened on the snap-gauge It is pressed on the bottom end of the snap-gauge in the card column.

Optionally, the fastener includes flexible handle, press block, connecting rod and spring, and the press block slideably connects It is connected to the connecting rod, the connecting rod is connected to the card column, and the connecting rod can turn using the card column as shaft around the card column Dynamic, the spring is connected between the press block and the card column；The flexible handle is connected to the top of the connecting rod.

Optionally, the snap-gauge is set as two, and two snap-gauges are set in the mounting groove and are parallel to each other, and two The holding tank for accommodating the connecting rod is formed between a snap-gauge.

Further, the bottom end of the snap-gauge is equipped with the card slot matched with the outer peripheral surface of the card column.

Optionally, the chassis overhang includes stringer and installation reinforcing beam, and the installation reinforcing beam is set to the stringer Top, the lower bottom end for folding strut are fixedly supported on the stringer, are fixedly supported in the middle part of the lower folding strut On the installation reinforcing beam.

Optionally, the armrest system includes fold locking mechanisms, and the fold locking mechanisms are set to the seat Rear lateral portion, the fold locking mechanisms include shells, and the upper top for folding strut is articulated with the shells, described to lean on The bottom of back is fixedly connected with the shells.

Optionally, the front side portion of the top for folding grillage and the seat is articulated, the bottom end for folding grillage It is articulated with the chassis overhang.

Optionally, the chassis overhang includes front-axle beam, and the bottom end for folding grillage is articulated with the front-axle beam.

Optionally, the grillage that folds is equipped with the locating slot for installing control panel.

Optionally, the chassis overhang includes under(-)chassis and two support frames, and two support frames as described above are fixed respectively The two sides of the under(-)chassis are set to, support frame as described above extends along the front-rear direction of the under(-)chassis, and support frame as described above Equipped at least two wheel installation positions, each wheel installation position is arranged along the extending direction of support frame as described above, the wheel peace Dress is equipped with mobile wheel in position.

Optionally, support frame as described above includes intermediate support, front support beam and rear support beam, before the wheel installation position is divided into Wheel installation position and rear wheel installation position, the front support beam and the rear support beam are fixedly installed on the intermediate support respectively Two sides, and the front vehicle wheel installation position, the rear support beam and institute are formed between the front support beam and the intermediate support It states and forms the rear wheel installation position between intermediate support；The mobile wheel is divided into preceding mobile wheel and rear mobile wheel, institute Mobile wheel is installed in the front vehicle wheel installation position before stating, and the preceding mobile wheel is connected with the front support beam, institute Rear mobile wheel is stated to be installed in the rear wheel installation position.

Optionally, the intermediate support is connected with installation reinforcing beam, and the installation reinforcing beam prolongs portion after including, after described Mobile wheel be connected to it is described after prolong portion.

Optionally, the intermediate support includes bottom beam and two curb girders, and two curb girders are respectively arranged at the bottom beam Both ends and form the plug groove for battery installation, the installation reinforcing beam is connected on two curb girders.

Optionally, the under(-)chassis includes that front-axle beam, the back rest and at least two stringers, each stringer are connected to institute It states between front-axle beam and the back rest, two support frames as described above are connected to the both ends of the front-axle beam.

Optionally, the back rest is articulated with bracket at tail part, and the end of the bracket at tail part is equipped with tail wheel, the folded sheet Drive rod is provided between frame and the bracket at tail part, the both ends of the drive rod are pivotally connected the folding grillage and the tail respectively Portion's bracket.

Optionally, the armrest system includes folding arm and handrail body, and the folding arm can be rotated and foldedly be connected to The seat, the handrail body are articulated with the top for folding arm.

Optionally, the seat is connected with fold locking mechanisms, and the folding arm is rotatably connected at the fold latch Determine mechanism.

Optionally, the fold locking mechanisms include shells, gear, STATEMENT OF FEDERALLY SPONSORED and rocker arm, and the folding arm passes through the One drive-connecting shaft is articulated with the shells, and the gear is set on first drive-connecting shaft, and the STATEMENT OF FEDERALLY SPONSORED is installed on the shell Part, and the STATEMENT OF FEDERALLY SPONSORED is equipped with the alligator that can be meshed with the gear, the rocker arm is articulated in the shells, and the rocker arm It is connected with the STATEMENT OF FEDERALLY SPONSORED, the articulated section of the rocker arm and the shells is equipped with torsional spring.

Optionally, the STATEMENT OF FEDERALLY SPONSORED includes arc-shaped limit component and bar shaped sliding block, and the alligator is set to the arc-shaped limit On component, the arc-shaped limit component has pivot end and connecting pin, and the pivot end is articulated with the shells, the connection End is connected with the first end of the bar shaped sliding block, and the shells is equipped with sliding slot, and the bar shaped sliding block is slidably mounted on In the sliding slot, and the second end of the bar shaped sliding block is connected with the rocker arm.

Optionally, the rocker arm includes principal arm and linking arm, and the linking arm is set to one end of the principal arm, and the company It connects arm and the principal arm forms angle, the linking arm is equipped with slide opening, and the second end of the bar shaped sliding block is provided with connecting shaft, institute Connecting shaft is stated to be arranged in the slide opening.

Optionally, the shells has installation cavity, and the shells is equipped with the strip-shaped hole communicated with the installation cavity, described Gear and the STATEMENT OF FEDERALLY SPONSORED are mounted in the installation cavity, and the rocker arm is stretched out from the strip-shaped hole, first pivot joint Axis is pierced by from the shells and is connected with the bottom end for folding arm.

Optionally, the folding arm includes the first folding and second folds arm, and the bottom end of the first folding arm passes through institute It states the first drive-connecting shaft to connect with the shells, the described second bottom end for folding arm passes through the second drive-connecting shaft and the shells phase pivot It connects, the top of the top of the first folding arm and the second folding arm is articulated with the handrail body respectively.

Optionally, the first folding arm and the second folding arm are mutually arranged parallel, and the second folding arm is equipped with The first groove extended along its length, the first folding arm are movably contained in first groove.

Optionally, the bottom of the handrail body is fixedly installed with support, and described first, which folds arm and described second, folds Arm is connected by the support with the handrail body respectively.

Optionally, the support includes connecting plate, the first pivot connecting plate and the second pivot connecting plate, first pivot connecting plate and described Second pivot connecting plate is set to the bottom surface of the connecting plate, and the first folding arm is articulated with first pivot connecting plate, and described second Arm is folded to be articulated with second pivot connecting plate.

Optionally, it is described second fold arm compared to it is described first fold arm closer to the rear end of the handrail body, it is described The length of second pivot connecting plate is greater than the length of first pivot connecting plate.

Optionally, the first folding arm is equipped with the second groove extended along its length, and second pivot connecting plate holds It is contained in second groove.

Optionally, the bottom of the handrail body is equipped at least row's mounting hole, and the support is equipped at least two through-holes, It is bolted between each through-hole and corresponding mounting hole.

Optionally, the cross section of the first folding arm and the cross section of the second folding arm are in half kidney-shaped, and institute It states the first folding arm and the second folding arm is oppositely arranged.

Implement the embodiment of the present invention, has the advantages that：

Wheelchair of the invention includes seat, backrest, chassis overhang, folding rack, folds grillage and armrest system, and is rolled over Folded bracket and fold grillage and be foldably connected between seat and chassis overhang by pin-jointed structure, backrest also with folding rack It is connected, and armrest system is foldably connected to above seat；As a result, when wheelchair is when being folded, folding can be passed through Seat is all folded on chassis overhang by bracket and the effect for folding grillage together with backrest, but also armrest system can be made to be folded in On seat, thus, the folding of wheelchair only needs to make folding rack, folding grillage and armrest system occur to turn by simply acting Dynamic to fold, the folding mode is more convenient, and folded structure is also compact neat, and it is empty to be conducive to reduction occupancy Between.

Detailed description of the invention

Fig. 1 is the first overall structure diagram of wheelchair described in the present embodiment.

Fig. 2 is the second overall structure diagram of wheelchair described in the present embodiment.

Fig. 3 is the side view of wheelchair described in the present embodiment.

Fig. 4 is structural schematic diagram of the wheelchair described in the present embodiment after shedding storage tank.

Fig. 5 is chassis overhang described in the present embodiment and the lower assembling structure schematic diagram folded between strut.

Fig. 6 is upper folding strut described in the present embodiment and the lower connection folded between strut after shedding flexible handle Structural schematic diagram.

Fig. 7 is the structural schematic diagram of bolt device described in the present embodiment.

Fig. 8 is the assembling structure schematic diagram between seat described in the present embodiment, backrest, armrest system and folding rack.

Fig. 9 is the structural schematic diagram of fold locking mechanisms described in the present embodiment.

Figure 10 is the assembling structure schematic diagram between folding arm and handrail body described in the present embodiment.

Description of symbols：

1, seat, 2, backrest, 3, chassis overhang, 31, under(-)chassis, 311, front-axle beam, 312, the back rest, 313, stringer, 32, branch Support, 321, intermediate support, 3211, bottom beam, 3212, curb girder, 3213, plug groove, 322, front support beam, 3221, cap, 323, rear support beam, 324, installation reinforcing beam, 4, folding rack, 41, upper folding strut, 411, snap-gauge, 4111, Ka Jiao, 42, under Folding strut, the 421, first supporting plate, the 422, second supporting plate, 423, main rod body, 424, card column, 4241, sleeve gasket, 5, folding grillage, 6, armrest system, 61, folding arm, the 611, first folding arm, the 612, second folding arm, 62, handrail body, 621, mounting hole, 63, Fold locking mechanisms, 631, shells, 6311, main casing, 6312, face-piece, 632, gear, 633, STATEMENT OF FEDERALLY SPONSORED, 6331, arc-shaped limit Component, 6331a, alligator, 6331b, pivot end, 6331c, connecting pin, 6332, bar shaped sliding block, 6332a, connecting shaft, 634, shake Arm, 6341, principal arm, 6342, linking arm, 6342a, slide opening, the 635, first drive-connecting shaft, the 636, second drive-connecting shaft, 64, support, 641, connecting plate, 6411, through-hole, the 642, first pivot connecting plate, the 643, second pivot connecting plate, 7, bolt device, 71, latch body, 72, Bracing wire, the 73, first spring, 74, installation casing, 75, backstop casing, 8, fastener, 81, flexible handle, 82, press block, 83, company Bar, 84, second spring, 9, preceding mobile wheel, 10, rear mobile wheel, 11, pedal support, 111, foot pedal, 12, control panel, 13, storage tank, 14, bracket at tail part, 141, tail wheel, 15, drive rod, 16, control box, 17, battery, 18, driving motor.

Specific embodiment

Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other Embodiment shall fall within the protection scope of the present invention.

In the description of the present invention, it is to be understood that, term " on ", "lower", "left", "right", "top", "bottom" etc. indicate Orientation or positional relationship be based on the orientation or positional relationship shown in the drawings, be merely for convenience of description the present invention and simplification retouch It states, rather than the device or element of indication or suggestion meaning must have a particular orientation, be constructed and operated in a specific orientation, Therefore it is not considered as limiting the invention.

Referring to Fig. 1 to Fig. 4, the present embodiment provides a kind of wheelchairs comprising seat 1, chassis overhang 3, folds branch at backrest 2 Frame 4, folding grillage 5 and armrest system 6, the top of folding rack 4 are articulated in the rear lateral portion of seat 1, and the top of folding rack 4 End is connected with the bottom of backrest 2, and the bottom end of folding rack 4 is connected with chassis overhang 3, folds top and the seat 1 of grillage 5 It is articulated, the bottom end for folding grillage 5 is articulated with chassis overhang 3, and armrest system 6 is foldably connected on seat 1.As a result, When wheelchair is when being folded, by folding rack 4 and the folding of grillage 5 can be folded acts on and all roll over seat 1 together with backrest 2 It is stacked on chassis overhang 3, but also armrest system 6 can be folded on seat 1, thus, the folding of wheelchair only needs to pass through letter Single movement makes folding rack 4, fold grillage 5 and armrest system 6 rotates folding, and the folding mode is more convenient, And folded structure is also compact neat, is conducive to reduce occupied space.

Wherein, in conjunction with Fig. 2 to 4, and referring to Fig. 6 and Fig. 7, the folding rack 4 of the present embodiment includes upper 41 He of folding strut Lower folding strut 42, the upper top for folding strut 41 are articulated in the rear lateral portion of seat 1, and the upper top for folding strut 41 and backrest 2 bottom is fixedly connected, and the upper bottom end for folding strut 41 is articulated with the lower top for folding strut 42, the lower bottom for folding strut 42 End is fixedly supported on the chassis overhang 3；Specifically, lower folding strut 42 includes main rod body 423, the first supporting plate 421 and the Two supporting plates 422, the first supporting plate 421 and second supporting plate 422 are set to the top of main rod body 423, and the first supporting plate 421 and institute It is arranged in parallel to state the second supporting plate 422, forms mounting groove, upper folding strut 41 between the first supporting plate 421 and the second supporting plate 422 It protrudes into mounting groove and is articulated with lower folding strut 42；Thus, upper folding strut 41 can be carried out relative to lower folding strut 42 Rotation, and then folding rack 4 can be made to realize folder function.Bolt device 7 is installed on first supporting plate 421, the bolt device 7 packet It has included latch body 71, bracing wire 72, the first spring 73, installation casing 74 and backstop casing 75, backstop casing 75 and has been connected to installation One end of casing 74, and the diameter of backstop casing 75 is less than the diameter of installation casing 74, latch body 71 is arranged in the logical set of backstop In pipe and installation casing 74, latch body 71 is equipped with step, and the first spring 73 is set in installation casing 74, and the first spring 73 Both ends abut the end of above-mentioned step and backstop casing 75 respectively, and the tail end of latch body 71 is connected with bracing wire 72, bolt sheet The head of body 71 is stretched out from the other end of installation casing 74, and the first supporting plate 421 is equipped with perforation, and upper folding strut 41 is equipped with engaging Recess, latch body 71 are telescopically inserted in perforation and engaging recess after stretching out from installation casing 74.Due to wheelchair two sides Folding rack 4 be mounted on bolt device 7, so that a bracing wire 72 can be shared between two bolt devices 7, as a result, when When pulling bracing wire 72, the latch body 71 of two sides is shunk from corresponding perforation and engaging recess, then above folding strut 41 can It is turned folding relative between lower folding strut 42；And it is worn when upper folding strut 41 is expanded to relative to lower folding strut 42 Hole with when engaging recess and aligning, latch body 71 can protrude under the action of the spring perforation with and engage in recess, so as to It is folded in realization relatively fixed between strut 41 and lower folding strut 42.

Further, the upper strut 41 that folds is equipped with the snap-gauge 411 for extending along direction setting, lower folding 42 top of strut Card column 424 is connected between first supporting plate 421 and the second supporting plate 422, card column 424 is located at the side of above-mentioned main rod body 423, and blocks Column 424 is connected with fastener 8 perpendicular to the plane where snap-gauge 411, lower folding strut 42 or card column 424, which passes through It is fastened on snap-gauge 411 and is pressed on the bottom end of snap-gauge 411 in card column 424.The fastener 8 of the present embodiment includes flexible handle 81, press block 82, connecting rod 83 and second spring 84, press block 82 are slidably connected to connecting rod 83, and one end of the connecting rod 83 connects It is connected to card column 424, and connecting rod 83 can be that shaft is rotated around the card column 424 with card column 424, second spring 84 is connected to press block 82 Between card column 424, flexible handle 81 is connected to the top of connecting rod 83.Specifically：The bottom end of snap-gauge 411 is equipped with and card column 424 The card slot that matches of outer peripheral surface, and sleeve gasket 4241 compatible with card slot is socketed in card column 424；And card column 424 can be around certainly Body center axis thereof, the above-mentioned fixation of connecting rod 83 is plugged in card column 424, and connecting rod 83 and card column 424 are perpendicular；In addition, card The top of plate 411 is equipped with card angle 4111, which is set as rounded corner；Above-mentioned snap-gauge 411 is set as two, two snap-gauges 411 are set in mounting groove and are parallel to each other, and the holding tank for accommodating connecting rod 83 is formed between two snap-gauges 411.By This, when upper folding strut 41 is unfolded relative to lower folding strut 42 and realizes between the two relatively fixed by bolt device 7 When, fastener 8 can be fastened on snap-gauge 411 and the bottom end of snap-gauge 411 is pressed in card column 424, strut is folded in realization Further fixing between 41 and lower folding strut 42, the fixation after the two is unfolded is more firm, and then can be avoided wheelchair It shakes, is conducive to enhance the structural stability of wheelchair after deployment, to be conducive to promote user experience；And when need into When the folding of row wheelchair, can first engaging lifting part 8 fastening effect.Specifically, fastener 8 can hold activity when fastening Handle 81 pushes the direction rotation where connecting rod 83 towards above-mentioned holding tank, makes press block 82 on connecting rod 83 across above-mentioned Ka Jiao 4111, across rear, press block 82 can be pressed on the top of snap-gauge 411 under the effect of second spring 84, to make snap-gauge 411 Bottom end is pressed in card column 424, the sleeve gasket 4241 in the card column 424 at this point, card slot of 411 bottom end of snap-gauge can link closely, and when needs When the effect of engaging lifting part 8, then holds flexible handle 81 and connecting rod 83 is pulled to rotate towards the direction far from holding tank, make connecting rod 83 Press block 82 in the opposite direction across above-mentioned card angle 4111；Wherein, which can phase when by card angle 4111 Connecting rod 83 is slided, then since above-mentioned card angle 4111 is set as rounded corner, then can make press block 82 smoothly across Ka Jiao 4111。

In conjunction with Fig. 1 to Fig. 3, and referring to fig. 4 and Fig. 5, the chassis overhang 3 of the present embodiment includes under(-)chassis 31 and two Support frame 32, two support frames 32 are fixedly installed on the two sides of under(-)chassis 31 respectively, and each support frame 32 is respectively along under(-)chassis 31 front-rear direction extends, and each support frame 32 is all provided with that there are two wheel installation positions, and each wheel installation position is along support frame 32 Extending direction is arranged, and is mounted on mobile wheel in each wheel installation position.It should be noted that the vehicle on each support frame 32 Wheel installation position and corresponding mobile wheel can be set to two or more.As a result, since the every side of wheelchair is equipped at least two On the one hand mobile wheel then can enable the chassis structure being made of chassis overhang 3 and the mobile wheel to ensure wheelchair On the other hand the stabilization of support construction advantageously reduces the size of mobile wheel, so as to reduce the center of gravity of wheelchair, so that pushing away Wheelchair carried out more easy when sill.In addition, the chassis structure of the wheelchair is more firm, be conducive to be promoted its use it is reliable Property.In the present embodiment, the radius of each mobile wheel can be 5cm-10cm, so that the center of gravity of wheelchair is advantageously reduced, so that pushing away It is more easy that wheelchair crosses sill.

Specifically, the support frame 32 of the present embodiment includes intermediate support 321, front support beam 322 and rear support beam 323, on It states wheel installation position and is divided into front vehicle wheel installation position and rear wheel installation position, fixation is set respectively for front support beam 322 and rear support beam 323 The two sides of intermediate support 321 are placed in, and form above-mentioned front vehicle wheel installation position between front support beam 322 and intermediate support 321, it is rear to prop up Above-mentioned rear wheel installation position is formed between support beam 323 and intermediate support 321；9 He of mobile wheel before above-mentioned mobile wheel can be divided into Mobile wheel 10 afterwards, preceding mobile wheel 9 are installed in front vehicle wheel installation position, and rear mobile wheel 10 is installed on rear wheel installation position In.In the present embodiment, front support beam 322 is integrally formed with intermediate support 321, and rear support beam 323 and intermediate support 321 are solid Fixed connection, it is to be herein pointed out rear support beam 323 can also be integrally formed with intermediate support 321, and front support beam 322 Mode can be fixedly connected with to be mounted on intermediate support 321.Reinforce in addition, the intermediate support 321 of the present embodiment is connected with installation Beam 324, and install between reinforcing beam 324 and the front-axle beam 311 of under(-)chassis 31 and/or install reinforcing beam 324 and under(-)chassis 31 Stringer 313 between and/or installation reinforcing beam 324 and the back rest 312 of under(-)chassis 31 between can be supported by support rod Connection, installation reinforcing beam 324 prolong portion after including, and rear mobile wheel 10 is connected to after this portion that prolongs, and preceding mobile wheel 9 then with it is upper It states front support beam 322 to be connected, and preceding mobile wheel 9 can be universal wheel.Further, the intermediate support 321 of the present embodiment wraps Bottom beam 3211 and two curb girders 3212 are included, two curb girders 3212 are respectively arranged at the both ends of bottom beam 3211 and are formed and pacified for battery 17 The plug groove 3213 of dress, above-mentioned installation reinforcing beam 324 are connected on two curb girders 3212, thus, due in intermediate support 321 The upper plug groove 3213 being arranged for installing battery 17, then can install battery 17 in the two sides of wheelchair, be conducive to increase 17 capacity of battery of wheelchair, promotes the cruising ability of wheelchair, and the frame mode is more ingenious, can rationally utilize wheelchair knot The space of structure is conducive to the compactness for promoting Wheelchair structure；And installation reinforcing beam 324 is set, prolong thereafter in addition to can use After portion's installation other than mobile wheel 10, additionally it is possible to reinforce the stable structure of intermediate support 321.

In addition, the front support beam 322 of the present embodiment is also connected with pedal support 11, which is equipped with foot pedal 111, thus, when user is sitting on wheelchair, foot can be placed on foot pedal 111.And on the other hand, 322 He of front support beam The inside of intermediate support 321 can be hollow and be connected, and the front end of front support beam 322 can be equipped with opening, and the opening is removable Cap 3221 is installed with unloading, above-mentioned opening can be opened using the inner space of support frame 32 come hidden wiring as a result, Cap 3221 can facilitate the maintenance and repair for above-mentioned hidden route, mobile wheel 9 and the preceding branch before capable of also facilitating Support the maintenance and maintenance of the connection structure between beam 322.

In the present embodiment, under(-)chassis 31 includes front-axle beam 311, the back rest 312 and at least two stringers 313, each stringer 313 It is connected between front-axle beam 311 and the back rest 312, two above-mentioned support frames 32 are connected to the both ends of front-axle beam 311；Specifically For, the both ends of the front-axle beam 311 are separately connected the bottom beam 3211 of the intermediate support 321 positioned at two sides.And the folding of the present embodiment Grillage 5 is obliquely installed between seat 1 and under(-)chassis 31, and the bottom end for folding grillage 5 is articulated with above-mentioned front-axle beam 311, is rolled over The top of lamination frame 5 and the front side portion of the seat 1 are articulated, thus, support 1 front side portion of seat can be played by folding grillage 5 Effect, and be able to achieve folder function.In addition, the folding grillage 5 is equipped with the locating slot for installing control panel 12, control panel 12 are mounted in the locating slot, are able to achieve the reasonable utilization for space, and then the compactness of lift structure.The present embodiment Storage tank 13 can be placed on under(-)chassis 31, the storage tank 13 be located at fold grillage 5 behind, thus, can make full use of wheelchair into Space after row folding between seat 1 and under(-)chassis 31 can be deposited by placing within this space storage tank 13 for user Various articles are put to provide conveniently.In addition, the bottom end of the lower folding strut 42 of the present embodiment is fixedly supported to the back rest 312 or in which one On root stringer 313, above-mentioned installation reinforcing beam 324 is located at the top of the stringer 313, and lower folding strut 42 passes through installation reinforcing beam 324, and it is lower fold strut 42 midfoot support installation reinforcing beam 324 on, from there through it is lower fold strut 42 supporting role The support for seat 1 rear lateral portion and backrest 2 can be achieved.In addition, the above-mentioned back rest 312 is articulated with bracket at tail part 14, the tail portion branch The end of frame 14 is equipped with tail wheel 141, which can play the role of further supporting wheelchair；Fold grillage 5 and tail portion Drive rod 15 is provided between bracket 14, the both ends of drive rod 15 are pivotally connected the side for folding grillage 5 and bracket at tail part 14 respectively, then When so that wheelchair folding, which also follows folding together with tail wheel 141 and tilts, and is conducive to after further decreasing folding Occupied space.

The wheelchair of the present embodiment is by folding rack 4 and folds the composition fold mechanisms such as grillage 5, which is being folded When, by making upper folding strut 41 be carried forward rotation relative to lower folding strut 42, and make to fold grillage 5 relative to its bottom End is rotated, then seat 1 can be made to be translated to its front lower place, and backrest 2 is made to occur to turn relative to lower folding strut 42 It is dynamic, seat 1 and backrest 2 can finally be folded in above under(-)chassis 31.

Combined with Figure 1 and Figure 2, and referring to Fig. 8 to Figure 10, the armrest system 6 of the present embodiment includes folding arm 61 and handrail sheet Body 62 folds arm 61 and is rotatably foldedly connected to seat 1, and handrail body 62 and the top for folding arm 61 are articulated.Specifically, Seat 1 is connected with fold locking mechanisms 63, folds arm 61 and is rotatably connected at fold locking mechanisms 63.The fold locking mechanisms 63 include shells 631, gear 632, STATEMENT OF FEDERALLY SPONSORED 633 and rocker arm 634, folds arm 61 and passes through the first drive-connecting shaft 635 and shells 631 It is articulated, gear 632 is set on the first drive-connecting shaft 635, and STATEMENT OF FEDERALLY SPONSORED 633 is installed on shells 631, and be equipped with can be with for STATEMENT OF FEDERALLY SPONSORED 633 The alligator 6331a that gear 632 is meshed, rocker arm 634 is articulated in the shells 631, and rocker arm 634 is connected with STATEMENT OF FEDERALLY SPONSORED 633, The articulated section of rocker arm 634 and shells 631 is equipped with the first torsional spring.As a result, by operating rock arm 634, STATEMENT OF FEDERALLY SPONSORED 633 can be driven Movement, makes alligator 6331a and gear 632 in the STATEMENT OF FEDERALLY SPONSORED 633 be separated, to be connected to the folding on the first drive-connecting shaft 635 Folded arm 61 is able to carry out rotation, and then can realize adjusting of the handrail body 62 in any different height position of seat or wheelchair, And after unclamping rocker arm 634, then rocker arm 634 understands return under the action of the first torsional spring, so that the also return of STATEMENT OF FEDERALLY SPONSORED 633 is driven, So that the alligator 6331a in STATEMENT OF FEDERALLY SPONSORED 633 is meshed with gear 632, and then can realize handrail body 62 after carrying out height adjustment Position locking and hovering.Thus, the fold locking mechanisms 63 of the present embodiment can be realized handrail body 62 on different height Adjusting and hovering, and then can facilitate user be seated in seat or from seat come out, be conducive to promoted user experience.

Wherein, shells 631 includes main casing 6311 and face-piece 6312, and the lid of face-piece 6312 is located on main casing 6311, and face Shell 6312 and main casing 6311 surround installation cavity, and STATEMENT OF FEDERALLY SPONSORED 633 and gear 632 are installed in the installation cavity, and the one of rocker arm 634 End is connected with STATEMENT OF FEDERALLY SPONSORED 633, and the other end is pierced by from shells 631.STATEMENT OF FEDERALLY SPONSORED 633 includes that arc-shaped limit component 6331 and bar shaped are sliding Block 6332, above-mentioned alligator 6331a be set to arc-shaped limit component 6331 on, arc-shaped limit component 6331 have pivot end 6331b and Connecting pin 6331c, pivot end 6331b and the main casing 6311 of shells 631 are articulated, and pivot end 6331b and main casing 6311 Articulated section the second torsional spring is installed, connecting pin 6331c is flexibly connected with the first end of bar shaped sliding block 6332, the master of shells 631 Shell 6311 is equipped with sliding slot, and bar shaped sliding block 6332 is slidably mounted in sliding slot, and the second end of bar shaped sliding block 6332 with Rocker arm 634 is connected.Specifically, rocker arm 634 includes principal arm 6341 and linking arm 6342, linking arm 6342 is set to principal arm 6341 One end, and linking arm 6342 and principal arm 6341 form angle, which can be 90 degree, and linking arm 6342 is equipped with slide opening 6342a, item The second end of shape sliding block 6332 is provided with connecting shaft 6332a, and connecting shaft 6332a is arranged in slide opening 6342a；And shells 631 is set There is the strip-shaped hole communicated with above-mentioned installation cavity, the principal arm 6341 of rocker arm 634 is stretched out from the strip-shaped hole；First drive-connecting shaft 635 is then It is pierced by from shells 631 and is connected with the bottom end for folding arm 61.As a result, when pushing the principal arm 6341 of rocker arm 634, principal arm 6341 Linking arm 6342 will push bar shaped sliding block 6332 and move backward along the chute, and then bar shaped sliding block 6332 will drive arc-shaped limit structure Part 6331 rotates, and the alligator 6331a of arc-shaped limit component 6331 is made to be detached from the gear 632 on the first drive-connecting shaft 635, at this point, folding Folded arm 61 may be rotated to be adjusted with the height to handrail body 62, and when unclamping rocker arm 634, then 634 meeting of rocker arm Return under the action of the first torsional spring, and then bar shaped sliding block 6332 is driven to move forward along the chute, make arc-shaped limit component 6331 It is rotated towards the direction where gear 632, and the second torsional spring also drives arc limit component 6331 that the rotation occurs, to can make Alligator 6331a on arc-shaped limit component 6331 is meshed with said gear 632, realizes for folding the lock after arm 61 rotates It is fixed, thus handrail body 62 can be realized in the hovering of any different height position.

In addition, the above-mentioned upper top for folding strut 41 can be articulated with shells 631, and the bottom of backrest 2 can be with shells 631 It is fixedly connected, thus, it is possible to realize seat 1 and the upper relative rotation folded between strut 41, namely realizes the company of folding rack 4 With the relative rotation between backrest 2 and seat 1 so that during folding rack 4 folds, can be realized backrest 2 and seat 1 it Between doubling, and realize that backrest 2 and seat 1 are folded in together on chassis overhang 3 in turn.

The folding arm 61 of the present embodiment may include that the first folding arm 611 and second folds arm 612, and first folds arm 611 Bottom end is connect with the first drive-connecting shaft 635, and the second bottom end for folding arm 612 passes through the main casing of the second drive-connecting shaft 636 and shells 631 6311 are articulated, first fold arm 611 top and second fold arm 612 top respectively with above-mentioned 62 phase pivot of handrail body It connects.The first folding arm 611 and second folds the mutually parallel setting of arm 612, and the second folding arm 612 is equipped with along its length The first groove extended, the first folding arm 611 are movably contained in first groove.Arm is folded by first as a result, 611 and second folding arm 612 can be fixedly supported handrail body 62, and first folds arm 611 and second and folds arm 612 The handrail body 62 and seat 1 can be supported parallel or substantially parallel always during turning folding, and first folds Arm 611 and second folds turning folding for arm 612, then the height adjustment for handrail body 62 can be achieved, thus, it is possible to convenient User is seated in wheelchair or comes out from wheelchair.On the other hand, when the first folding arm 611 and the second folding arm 612 are rotated When folding, the height of handrail body 62 can be reduced to the position of the seat 1 of wheelchair, this is conducive to reduce institute after wheelchair folds The space occupied can make folded structure more compact.And in such a way that the first groove cladding first folds arm 611, it removes It can reinforce also helping the Overall View for promoting product appearance except the stabilization of support construction and the compactness of lift structure Sense.

Further, the first folding arm 611 and the second folding arm 612 are connected by the same support 64 with handrail body 62 It connects.The support 64 includes connecting plate 641, the first pivot connecting plate 642 and the second pivot connecting plate 643, and the first pivot connecting plate 642 and second is pivotally connected Plate 643 is fixedly installed on the bottom surface of connecting plate 641 respectively, and connecting plate 641 is removably mounted on the bottom of handrail body 62, the One folding arm 611 is articulated with the first pivot connecting plate 642, and the second folding arm 612 is articulated with the second pivot connecting plate 643.Specifically, Second, which folds arm 612, folds arm 611 compared to first closer to the rear end of handrail body 62, and the length of the second pivot connecting plate 643 is greater than The length of first pivot connecting plate 642, the first folding arm 611 are equipped with the second groove for extending along its length, the, two pivot connecting plates 643 are contained in second groove, are turned folding and are realized in the first folding arm 611 and the second folding arm 612 as a result, When the height adjustment and hovering of handrail body 62, the first folding arm 611 and the second folding arm 612 can support the handrail always Ontology 62 and seat 1 are parallel or substantially parallel, and then can better assure the handrail function of handrail body 62.In the present embodiment In, the cross section of the cross section of the first folding arm 611 and the second folding arm 612 is in half kidney-shaped, and first folds arm 611 and the Two-fold arm 612 is oppositely arranged, thereby, it is possible to realize that the cladding of the first groove on the second folding arm 612 first folds arm 611, First the second groove folded on arm 611 coats the second pivot connecting plate 643, in turn, is conducive to the first folding arm 611 and second and folds Arm 612 realizes mutual relative motion during being turned folding, and is gone on smoothly with ensure to turn folding, moreover, Mode with this configuration, additionally it is possible to promote the whole perception for folding 61 appearance of arm.In addition, the bottom of handrail body 62 is equipped at least One row's mounting hole 621, the connecting plate 641 of support 64 are equipped at least two through-holes 6411, and each through-hole 6411 is installed with corresponding It is bolted between hole 621, then support 64 can be achieved and folds being detachably connected between arm 61 and handrail body 62, And then handrail body 62 can according to need to adjust its front and back relative position and/or a left side between support 64 and folding arm 61 Right relative position, to conform better to user demand.Moreover, the inner hollow of the handrail body 62 of the present embodiment, side can Port is set, which can be removably installed lid, thus, it is possible to facilitate tearing open between handrail body 61 and support 64 Dress.

The wheelchair of the present embodiment can be electric wheelchair, referring to Fig. 1 and Fig. 2, specifically, the positioning of above-mentioned folding grillage 5 Control panel 12 is installed, the mountable control box 16 in the front end of one of handrail body 62 controls settable use on box 16 in slot In rocking bar and various control buttons that control wheelchair moves forward or back, the intermediate support 321 of wheelchair two sides can insert electricity respectively Pond 17, it is above-mentioned after mobile wheel 10 be connected with driving motor 18, the driving motor 18, control box 16 and battery 17 respectively with control Plate 12 is electrically connected, and control panel 12 can control driving motor 18 according to the setting of control box 16 as a result, with realization pair In the control of wheel chair sport.

The folding process of the wheelchair of the present embodiment is concretely：The flexible handle 81 for first pulling above-mentioned fastener 8, makes to fasten Part 8 is released to the fastening of snap-gauge 411, then pulls the bracing wire 72 of bolt device 7, makes the latch body 71 of bolt device 7 from upper It folds and is shunk in the perforation of the engaging recess and the first supporting plate 421 of strut 41, then push the rocker arm of fold locking mechanisms 63 634, it is folded in armrest system 6 on seat 1, pushes backrest 2 again later, make to fold strut 41 and fold grillage 5 to occur to turn It is dynamic to fold, and then it is superimposed on backrest 2 and seat 1 on chassis overhang 3, so complete the folding of wheelchair.Each component of wheelchair Turning folding direction specifically can be as shown by arrows in Figure 3.

The expansion process of the wheelchair of the present embodiment is concretely：Backrest 2 and seat 1 are lifted, the card for folding strut 41 is made The perforation for closing recess and above-mentioned first supporting plate 421 aligns, and then the latch body 71 of bolt device 7 is blocked under the action of the spring Enter perforation and engaging recess in, in realization fold strut 41 and it is lower fold strut 42 it is relatively fixed, then push above-mentioned button again The flexible handle 81 of component 8, is fastened on fastener 8 on snap-gauge 411, and the folding and expanding of wheelchair so can be completed.

To sum up, the wheelchair of the present embodiment realizes wheel by the fold mechanism being made of folding rack 4 and folding grillage 5 etc. Chair folds and unfolds, and realizes the fixation after wheelchair expansion by bolt device 7, and also by by fastener 8, snap-gauge 411 The stability that the structure after wheelchair expansion is promoted with the Zeng Wen mechanisms of the compositions such as card column 424, shakes, separately to avoid wheelchair Outside, the armrest system 6 of the present embodiment individually can be folded and be lifted, and fold locking mechanisms 63 can also realize handrail sheet Hovering or positioning of the body 62 in any height and position.Therefore, the wheelchair of the present embodiment can bring preferable experience to user.

It should be understood that various information are described in the present invention using term " first ", " second " etc., but these information It should not necessarily be limited by these terms, these terms are only used to for same type of information being distinguished from each other out.For example, not departing from the present invention In the case where range, " first " information can also be referred to as " second " information, and similar, " second " information can also be referred to as " first " information.

The above is a preferred embodiment of the present invention, it is noted that for those skilled in the art For, without departing from the principle of the present invention, several improvement and deformations can also be made, these improvement and deformations are also considered as Protection scope of the present invention.

Claims (33)

1. a kind of wheelchair, which is characterized in that including seat, backrest, chassis overhang, folding rack, fold grillage and handrail dress It sets, the top of the folding rack is articulated in the rear lateral portion of the seat, and the top of the folding rack and the backrest Bottom is connected, and the bottom end of the folding rack is connected with the chassis overhang, the top for folding grillage and the chair Seat is articulated, and the bottom end for folding grillage is articulated with the chassis overhang, and the armrest system is foldably connected to institute It states on seat.

2. wheelchair according to claim 1, which is characterized in that the folding rack includes upper folding strut and lower folding branch Bar, the upper top for folding strut are articulated in the rear lateral portion of seat, and the upper top for folding strut and the backrest Bottom is fixedly connected, and the upper bottom end for folding strut is articulated with the lower top for folding strut, the lower folding strut Bottom end be fixedly supported on the chassis overhang.

3. wheelchair according to claim 2, which is characterized in that the lower folding strut include main rod body, the first supporting plate and Second supporting plate, first supporting plate and second supporting plate are set to the top of the main rod body, and first supporting plate and institute It is arranged in parallel to state the second supporting plate, forms mounting groove, the upper folding branch between first supporting plate and second supporting plate Bar is protruded into the mounting groove and is articulated with the lower folding strut.

4. wheelchair according to claim 3, which is characterized in that bolt device is installed on first supporting plate, it is described to insert Pin assembly includes latch body, and first supporting plate is equipped with perforation, and the upper folding strut is equipped with engaging recess, described to insert Pin ontology is telescopically inserted in the perforation and the engaging recess.

5. wheelchair according to claim 3, which is characterized in that the upper folding strut, which is equipped with, extends along direction setting Snap-gauge is connected with card column between first supporting plate and second supporting plate, and the card column is located at the side of the main rod body, The card column is connected with fastener, the button perpendicular to the plane where the snap-gauge, the lower folding strut or the card column Component is pressed on the bottom end of the snap-gauge in the card column and being fastened on the snap-gauge.

6. wheelchair according to claim 5, which is characterized in that the fastener include flexible handle, press block, connecting rod and Spring, the press block are slidably connected to the connecting rod, and the connecting rod is connected to the card column, and the connecting rod can be with institute Stating card column is that shaft is rotated around the card column, and the spring is connected between the press block and the card column, the movable handle Hand is connected to the top of the connecting rod.

7. wheelchair according to claim 6, which is characterized in that the snap-gauge is set as two, and two snap-gauges are set to It in the mounting groove and is parallel to each other, and is formed with the holding tank for accommodating the connecting rod between two snap-gauges.

8. wheelchair according to claim 5, which is characterized in that the bottom end of the snap-gauge is equipped with the outer peripheral surface with the card column The card slot matched.

9. wheelchair according to claim 2, which is characterized in that the chassis overhang includes stringer and installation reinforcing beam, institute The top that installation reinforcing beam is set to the stringer is stated, the lower bottom end for folding strut is fixedly supported on the stringer, described It is fixedly supported in the middle part of lower folding strut on the installation reinforcing beam.

10. wheelchair according to claim 2, which is characterized in that the armrest system includes fold locking mechanisms, described Fold locking mechanisms are set to the rear lateral portion of the seat, and the fold locking mechanisms include shells, the upper folding strut Top is articulated with the shells, and the bottom of the backrest is fixedly connected with the shells.

11. wheelchair according to claim 1, which is characterized in that the front side on the top for folding grillage and the seat Portion is articulated, and the bottom end for folding grillage is articulated with the chassis overhang.

12. wheelchair according to claim 11, which is characterized in that the chassis overhang includes front-axle beam, the folding grillage Bottom end be articulated with the front-axle beam.

13. wheelchair according to claim 11, which is characterized in that the folding grillage is equipped with for installing control panel Locating slot.

14. wheelchair according to claim 1, which is characterized in that the chassis overhang includes under(-)chassis and two branch Support, two support frames as described above are fixedly installed on the two sides of the under(-)chassis respectively, and support frame as described above is along the under(-)chassis Front-rear direction extend, and support frame as described above be equipped at least two wheel installation positions, each wheel installation position is along the support The extending direction of frame is arranged, and is equipped with mobile wheel in the wheel installation position.

15. wheelchair according to claim 14, which is characterized in that support frame as described above include intermediate support, front support beam and Rear support beam, the wheel installation position are divided into front vehicle wheel installation position and rear wheel installation position, the front support beam and the rear branch Support beam is fixedly installed on the two sides of the intermediate support respectively, and between the front support beam and the intermediate support described in formation Front vehicle wheel installation position forms the rear wheel installation position between the rear support beam and the intermediate support；The mobile wheel It is divided into preceding mobile wheel and rear mobile wheel, the preceding mobile wheel is installed in the front vehicle wheel installation position, and the Forward Motor car wheel is connected with the front support beam, and the rear mobile wheel is installed in the rear wheel installation position.

16. wheelchair according to claim 15, which is characterized in that the intermediate support is connected with installation reinforcing beam, described Installation reinforcing beam prolongs portion after including, it is described after mobile wheel be connected to it is described after prolong portion.

17. wheelchair according to claim 16, which is characterized in that the intermediate support includes bottom beam and two curb girders, and two A curb girder is respectively arranged at the both ends of the bottom beam and forms the plug groove for battery installation, and the installation reinforcing beam connects It is connected on two curb girders.

18. wheelchair according to claim 14, which is characterized in that the under(-)chassis includes front-axle beam, the back rest and at least two Root stringer, each stringer are connected between the front-axle beam and the back rest, and two support frames as described above are connected to institute State the both ends of front-axle beam.

19. according to wheelchair described in claims requirement 18, which is characterized in that the back rest is articulated with bracket at tail part, institute The end for stating bracket at tail part is equipped with tail wheel, and drive rod, the biography are provided between the folding grillage and the bracket at tail part The both ends of lever are pivotally connected the folding grillage and the bracket at tail part respectively.

20. according to claim 1 to 19 described in any item wheelchairs, which is characterized in that the armrest system include fold arm and Handrail body, the folding arm, which can be rotated, is foldedly connected to the seat, the handrail body and the top for folding arm It is articulated.

21. wheelchair according to claim 20, which is characterized in that the seat is connected with fold locking mechanisms, the folding Folded arm is rotatably connected at the fold locking mechanisms.

22. wheelchair according to claim 21, which is characterized in that the fold locking mechanisms include shells, gear, linkage Part and rocker arm, the folding arm are articulated by the first drive-connecting shaft and the shells, and the gear is set to first pivot joint On axis, the STATEMENT OF FEDERALLY SPONSORED is installed on the shells, and the STATEMENT OF FEDERALLY SPONSORED is equipped with the alligator that can be meshed with the gear, described to shake Arm is articulated in the shells, and the rocker arm is connected with the STATEMENT OF FEDERALLY SPONSORED, the articulated section installation of the rocker arm and the shells There is torsional spring.

23. wheelchair according to claim 22, which is characterized in that the STATEMENT OF FEDERALLY SPONSORED includes that arc-shaped limit component and bar shaped are sliding Block, the alligator are set on the arc-shaped limit component, and the arc-shaped limit component has pivot end and connecting pin, the pivot joint End is articulated with the shells, and the connecting pin is connected with the first end of the bar shaped sliding block, and the shells is equipped with sliding slot, The bar shaped sliding block is slidably mounted in the sliding slot, and the second end of the bar shaped sliding block is connected with the rocker arm.

24. wheelchair according to claim 23, which is characterized in that the rocker arm includes principal arm and linking arm, the connection Arm is set to one end of the principal arm, and the linking arm and the principal arm form angle, and the linking arm is equipped with slide opening, the item The second end of shape sliding block is provided with connecting shaft, and the connecting shaft is arranged in the slide opening.

25. wheelchair according to claim 22, which is characterized in that the shells has installation cavity, and the shells is equipped with The strip-shaped hole communicated with the installation cavity, the gear and the STATEMENT OF FEDERALLY SPONSORED are mounted in the installation cavity, the rocker arm from It is stretched out in the strip-shaped hole, first drive-connecting shaft is pierced by from the shells and is connected with the bottom end for folding arm.

26. wheelchair according to claim 22, which is characterized in that the folding arm includes that the first folding and second fold The bottom end of arm, the first folding arm is connect by first drive-connecting shaft with the shells, and described second folds the bottom end of arm It is articulated by the second drive-connecting shaft and the shells, described first, which folds the top of arm and described second, folds the top difference of arm It is articulated with the handrail body.

27. wheelchair according to claim 26, which is characterized in that the first folding arm and the second folding arm are mutual Parallel setting, the second folding arm are equipped with the first groove extended along its length, and described first folds arm movably It is contained in first groove.

28. wheelchair according to claim 26, which is characterized in that the bottom of the handrail body is fixedly installed with support, The first folding arm and the second folding arm are connected by the support with the handrail body respectively.

29. wheelchair according to claim 28, which is characterized in that the support includes connecting plate, the first pivot connecting plate and Two pivot connecting plates, first pivot connecting plate and second pivot connecting plate be set to the connecting plate bottom surface, it is described first fold arm with First pivot connecting plate is articulated, and the second folding arm is articulated with second pivot connecting plate.

30. wheelchair according to claim 29, which is characterized in that described second, which folds arm, folds arm more compared to described first Close to the rear end of the handrail body, the length of second pivot connecting plate is greater than the length of first pivot connecting plate.

31. wheelchair according to claim 30, which is characterized in that the first folding arm is equipped with to be extended along its length The second groove, second pivot connecting plate is contained in second groove.

32. wheelchair according to claim 28, which is characterized in that installed equipped with an at least row bottom of the handrail body Hole, the support are equipped at least two through-holes, are bolted between each through-hole and corresponding mounting hole.

33. wheelchair according to claim 26, which is characterized in that described first folds the cross section of arm and second folding The cross section of folded arm is in half kidney-shaped, and the first folding arm and the second folding arm are oppositely arranged.