CN1049783A - Folding wheelchair frame - Google Patents

Abstract

A kind of folding wheelchair frame particularly can be around the wheelchair of the folded of some and its longitudinal axis traversed by.Wheelchair frame comprises back part; The hinged bottom parts in its rear end and back part lower end; The hinged seat part in its rear end and back part middle part; Its upper end and the hinged forepiece of seat part, its lower end removably is connected with the front end of bottom parts.Hinged all is around the axis revolution perpendicular to the wheelchair frame longitudinal axis.The most handy tubulose synthetic plastic part that is connected by tubular plastic joint of wheelchair frame each several part constitutes.Vehicle frame preferably also is provided with handrail, arrestment mechanism, the mechanism that makes the cylinder base installing mechanism and wheel is pulled down easily from the vehicle frame top.

Description

Folding wheelchair frame

The present invention relates to a kind of folding wheelchair frame, relate in particular to a kind of can be around the wheelchair of the folded of some and longitudinal axis traversed by.

Wheelchair is known, generally comprises a vehicle frame that a seat and four wheels are housed.Wheel generally comprises a pair of forward swivel wheel of vehicle frame and a pair of driving wheel that is contained in the vehicle frame rear portion of being contained in.The size of driving wheel should make the wheelchair user can catch it, so that it is rotated and handles.This known wheelchair frame is made can be around some folded that are arranged essentially parallel to the wheelchair longitudinal axis.The wheelchair frame that the purpose of this invention is to provide another structure, it can be around the folded of some and wheelchair longitudinal axis traversed by.

Foldable wheelchair structure frame of the present invention is made of following several parts: a back part, one in its back-end with the bottom parts of back part lower hinge, hinged with a back part middle part in its back-end seat part, hinged with a seat part in the top forepiece, forepiece couples together removably at the front end of its lower end and bottom parts, all are hinged all to be the axis revolution that is substantially perpendicular to the wheelchair frame longitudinal axis around some, and the device that can be connected with wheel is housed on the vehicle frame.

Constitute the various piece of wheelchair frame of the present invention, preferably made by other part of tubulose synthetic plastic, each also connects with tubulose synthetic plastic connector between part in addition.

Vehicle frame preferably is equipped with pair of armrests, and each handrail and back part are hinged, and constitutes dismountable the connection with forepiece or seat portion.Vehicle frame also preferably is equipped with a step frame that is connected with radial type with forepiece.

In a kind of most preferred embodiment of the present invention, be used for wheel is installed to device on the vehicle frame, comprise that a level is passed back part and the wheel shaft of the connection pair of driving wheels stretched from two ends.Both sides, forepiece lower end have a pair of socket, are used to adorn the axle of a pair of swivel wheel.

In another most preferred embodiment of the present invention, wheel comprises a locking plate, is used for wheel is detachably connected on the wheel shaft.This locking plate has a plate, have on the plate one big to first hole that can freely hold wheel shaft and one the eccentric slightly aperture of macropore therewith, this aperture be suitable for wheel shaft on a garden cannelure mesh.

Forepiece also preferably is detachably connected to the front end of bottom parts, and handrail also preferably is detachably connected on the forepiece.Removably connect the mode that is contained in the locking plate on one of each several part or handrail that preferably adopts everywhere, a groove on the axle on locking plate and the corresponding part reaches the purpose of locking together, and this locking plate has a plate with a macropore and an eccentric slightly aperture.

In a most preferred embodiment of the present invention, each locking plate is contained on the supporting member slidably, and this supporting member forms the part of wheel hub or other part of vehicle frame, and shifts it onto locked position with a spring.

Preferably mix arrestment mechanism according to this wheelchair frame of the present invention, this arrestment mechanism preferably is contained on the forepiece, and the handle portion that can swing is housed, handle drives an executive component and moves between the primary importance and the second position along the straight line passage, check the wheel that is contained on the vehicle frame at this executive component on the primary importance, on the second position, it unclamps from wheel.

In a special embodiment of the present invention, executive component is owing to the effect that is contained in the limiting element on the vehicle frame is limited to move along the straight line passage, pin on the handle portion puts in the groove of executive component and acts on, and between the primary importance and the second position, move, this groove has the axis with the axis oblique of actuator movement, therefore, and when turning handle, along with the motion of pin, this groove plays similar action of cam.

Below in conjunction with the most preferred embodiment of the present invention that accompanying drawing is described, this embodiment only gives out as an example, and each accompanying drawing is:

Fig. 1 is a three-dimensional side view of wheelchair frame of the present invention.

Fig. 2 be wheelchair frame shown in Figure 1 is shed brake unit and driving wheel and fold up after three-dimensional side view.

Fig. 3 be wheelchair frame shown in Figure 1 is shed brake unit and driving wheel and fold up after front elevational view.

Fig. 4 is the front elevational view that is in non-folded state and has loaded onto the wheelchair frame among Fig. 1 of wheel.

Fig. 5 is the front view of locking plate, and this dish is used for removably wheel being connected to wheel shaft, and forepiece is connected the front end of bottom parts, and the handrail bottom connects forepiece or seat part.

Fig. 6 is that wherein locking plate is in locked position through axle among Fig. 1 and the vertical sectional view that is contained in the wheel hub that wheel is housed on the vehicle frame.

Fig. 7 is the decomposition diagram of the arrestment mechanism shown in Fig. 1.

Wheelchair frame 10 comprises 11, one bottom parts of a back part 12, seat part 13, forepiece 14, swivel wheel 15 and a driving wheel 16.

Backrest section 11 comprises certain elongated tubular working of plastics, and it curves a pair of separating and parallel side rod member 20; The a pair of rod member that inclines inwardly 17 is positioned at rod member upper end, side, and they are coupled together by a horizon bar 18.Side lever 20 is coupled together by a horizontal plastic tube 30 in the place of any above its lower end, and pipe 30 rotates around a horizontal wheel shaft 19, and axle 19 is stretched from the two sides of backrest section 11, and driving wheel 16 can be contained on the wheel shaft 19 with dismountable connection.Connecting a hinge 21 in the lower end of every side lever, it can around one parallel with wheel shaft 19, thereby around the revolution of the vertical axis of vehicle frame longitudinal axis.

Bottom parts 12 comprises the side pipe 22 that a pair of tubulose synthetic plastics material is made, and every lateral canal 22 is connected with an end of hinge 21 at the one end.Side pipe 22 position is therebetween coupled together by a cross bar 23, and cross bar 23 is also made with the tubulose synthetic plastic.

Seat part 13 comprises a tubulose synthetic material that curves pipe 25 before a pair of side pipe 24 and a part in addition.The free end of side pipe 24 is hinged to by plank 26 on the side lever 20 of back part 11, and plank 26 can rotate around the pin on the corresponding side lever 20 27.

Forepiece 14 comprises a pair of synthetic plastic pipe 28, they be connected to seat part 13 side pipe 24 below.The front end of every pipe 28 has a hinge 29, and hinge 29 can be around one and the vertical axial-movement of wheelchair longitudinal axis.Each hinge 29 is connected with the upper end of a piped synthetic plastic lower limb 31, and there is an adapter sleeve 32 lower end of lower limb 31, and adapter sleeve 32 is used to adorn the axle of swivel wheel 15, and lower limb 31 also has a tubulose socket, so that removably insert the side pipe 22 of bottom parts 12.

Step frame 33 is contained on the forepiece 14, and it comprises first a U-shaped spare 34 of being made by tubular plastic, the foundation pipe 36 that it has two side pipes 35 and the upper end of two side pipes 35 is coupled together.Every lateral canal 35 is connected on the internal frame of lower limb 31, and its lower end has a hinge 40.U-shaped tubulose part 33 in addition is connected with a hinge 40 in its each termination.

Between seat part 13, back part 11, pin 27 and the introversion part 17, and the fabric that all stretched tight on the step frame 33, the preferably fabric of synthetic plastic volume.

The another kind of pattern of the present invention seat part fabric that do not stretch tight, but adorn a chamber pot seat.Another kind more specifically form is that the fabric on the seat can be lifted down easily, loads onto a just cylinder base.

The a pair of L shaped handrail 38 of curving is made by tubular plastic, and its horizontal component is hinged on two side levers 20 of back part 11, and vertical component is hinged on the projection 39, and projection 39 is protrudingly from the lower limb 31 of forepiece 14 to come.

In a kind of preferred embodiment, when will be when non-folded state becomes folded state wheelchair frame 10, just wheel 16 is unloaded down, make handrail 38 and projection 39 break away from also folding down, with the method for unclamping adapter sleeve 32 front portion 14 and bottom parts 12 are unclamped, bottom parts 12 just can upwards be folded to back part 11, and running-board bracket 33 just can be rolled over to leaning against forepiece 14 places, and part 13 related forepieces 14 in seat are upwards rolled over to back part 11 places.

Between wheel 16 and the wheel shaft 19, but between side pipe 22 and the adapter sleeve 32 and the demolition method of attachment between handrail 38 and the projection 39 preferably adopt as shown in Figure 5 locking plate 40.

A macropore 42 that has a biasing aperture 43 is arranged on the locking plate 40, and it is loaded on the supporting member 50 slidably, by spring 45 it is shifted onto locked position, as shown in Figure 6.In the time will unloading relative section, but dead spring 45 moves locking plate and allows the position unloaded.

For example, referring to Fig. 6, wheel 16 is fixed on the wheel shaft 19 by locking plate 40.When being in locked position, the locking plate position is fixed, like this, aperture 43 just with wheel shaft 19 on a groove 48 engagement and wheel 16 remained on the wheel shaft securely.For wheel 16 is unloaded down from wheel shaft 19, locking plate 40 is lifted down, for this reason, preferably adopt from the end 41 locking plate pushed to spring 45, like this, aperture 42 just with the garden week centering of wheel shaft 19, thereby allow wheel is unloaded down.

It is contemplated that, but similarly the locking plate device can be used for constituting handrail 38 and projection 39 and side pipe 20 and is connected with demolition between the adapter sleeve 32.

In addition, in operation, it is also contemplated that, but for 22 demolitions of two side pipes be connected to the locking plate adorned on two adapter sleeves 32 can by one connect two locking plates and between this two dish stretching and rope that be parallel to transverse tube 23 move to the released position simultaneously.

Brake unit 51 comprises: be contained in the clamper 52 on the forepiece 14 of wheelchair frame 10; An executive component 53, it can be along the straight line passage in the primary importance of checking tire with unclamp between the second position of tire and move; A handle 54 that is contained in rotationally on the clamper 52.

A prominent protuberance 55 that two parallel side are arranged is arranged on the free end of clamper 52, and it puts in the parallel sided groove (not shown) on the side of close clamper 52 of executive component 53, and forms with it and be slidingly matched.This groove cooperates the direction of having determined that the executive component straight line moves in protuberance 55 and the executive component.

The groove 58 of a minor axis 56 on hole on the handle 54 57 and executive component 53 stretches out, stretch in the axial hole 59 on the clamper 52, handle 54 can rotate around minor axis 56, and groove 58 makes executive component 53 slide between its primary importance and the second position with respect to minor axis 56.

One end of handle 54 has a pin 60, and it stretches out from handle 54, extend along the direction that is parallel to minor axis 56, and in the groove 61 on the insertion executive component 53.The moving direction oblique of groove 61 and executive component 53, thereby the arcuate movement of handle 54 rotating band untie-sell 60 plays a kind of similar action of cam to the wall of groove 61, makes executive component move between its primary importance and the second position.Groove 61 end portions 62 meet at right angles with the direction of motion of executive component 53.When executive component 53 was in its primary importance fully, pin 60 entered the part 62 of groove 61, and on this position, because the pressure between executive component 53 and the wheel 16, there is not the trend of unclamping in brake.

Those skilled in the art will understand, under the situation that does not break away from above-mentioned basic feature, can make multiple improvement and modification to wheelchair frame of the present invention.Forepiece can vertically raise, at its end seat part 13 is connected to back part 11.But better way is that forepiece is reasonably changeed an angle, is connected with seat part 13 with the middle part between its two ends.

Claims (11)

1, a kind of folding wheelchair frame, it comprises: a back part, hinged with a back part lower end in its back-end bottom parts, hinged with a back part middle part in its back-end seat part, hinged with a seat part in the top forepiece, it can couple together in demountable mode at the front end of its lower end and bottom parts, all are hinged all to be some axis revolutions that are substantially perpendicular to the wheelchair frame longitudinal axis around some, and the device that can be connected with wheel is housed on the vehicle frame.

2, according to the wheelchair frame of claim 1, it is equipped with pair of armrests, and each handrail and back part are hinged, and constitutes demountable the connection with forepiece or seat part.

3, according to the wheelchair frame of claim 1 or 2, it is equipped with a step frame hinged with forepiece.

4, according to wheelchair frame any in the claim 1 to 3, the device that is used for connecting wheel on it comprises that a level passes back part and stretch from two ends, and the wheel shaft of pair of driving wheels is installed.

5, according to wheelchair frame any in the claim 1 to 4, in the both sides of its forepiece lower end a pair of socket is housed also, be used to connect a pair of swivel wheel.

6, according to wheelchair frame any in the claim 1 to 5, wherein each wheel is connected with vehicle frame by a wheel shaft, each wheel has a locking plate on the wheel hub that is slidably mounted in this wheel, a macropore that penetrates it and one and the eccentric slightly eclipsed aperture of macropore are arranged on this dish, but the edge of this aperture matches with a garden annular groove demolition on the wheel shaft.

7, according to wheelchair frame any in the claim 1 to 5, but its forepiece with a locking plate demolition be connected the lower end of bottom parts front end, this locking plate is contained on one of these two parts slidably, this locking plate has a macropore that penetrates it and one and the eccentric slightly eclipsed aperture of macropore, but the edge of this aperture be contained in another parts on a pin on garden annular groove demolition cooperate.

8, according to wheelchair frame any in the claim 2 to 5, but its handrail is connected with forepiece or seat part demolition ground with a tight lock collar, this locking plate is contained on the handrail or forepiece and/or seat part slidably, locking plate has a macropore that penetrates it and one and the eccentric slightly eclipsed aperture of macropore, but the garden annular groove demolition on the edge of this aperture and the pin that is contained in another parts cooperate.

9, according to wheelchair frame any in the claim 6 to 8, wherein locking plate is shifted it onto locked position with a spring.

10, according to the wheelchair frame of one of claim 1 to 9, arrestment mechanism wherein is installed on its forepiece, this arrestment mechanism has a rotating handle portion, being used for driving an executive component moves between the primary importance and the second position along the straight line passage, check a wheel that is contained on the vehicle frame at this executive component on the primary importance, it unclamps from wheel on the second position.

11, a kind of wheelchair frame comprises several parts part in addition in the claim 1 to 10.

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