A kind of folding wheelchair that contracts
Technical field: this utility model relates to the wheelchair device technical field, is a kind of folding wheelchair that contracts more specifically
Background technology: the folding mode of existing wheelchair has only a kind of, and the spatial volume of poststack is bigger, the folding and unfolding of incompatibility Modern Family and go out and carry.
Summary of the invention: for overcoming above-mentioned shortcoming, the purpose of this utility model is a kind of folding wheelchair that contracts of design.Its technical scheme is: have in the vertical rod 2 behind two preceding vertical rods 5 and two back balladeur train 4, front carriages 7, preceding hinge frame 12 down and back down 16, four pairs of decussation twistings of hinge frame brace 15 respectively with above-mentioned 4,7,12 and 16 twistings; In the front carriages 7 cover pro-vertical rods 5, back balladeur train 4 is enclosed within the vertical rod 2 of back; Between two pairs of foldable base bars 18 and the preceding vertical rod 5 and hinged between the vertical rod 2 of back, seat surface 6 is fixed on the foldable base bar 18, two pairs can to roll over handrail 3 hinged with preceding vertical rod 5 and vertical rod 2 upper ends, back, articulated folding backrest 1 between vertical rod 2 upper ends, back, on the hinge frame 16 front-wheel 13 and universal wheel 17 are housed respectively under preceding frame 12 of hinge down and the back, front-wheel 13 and the treadle 9 coaxial installations of being with pedal 8, treadle pull bar 11 two ends are articulated in respectively on treadle 9 and the front carriages 7; Cut with scissors frame 12 and back hinge frame 16 down before following steady rest 14 ends are hinged respectively down, its central authorities are provided with small extension spring 19 and 6 following connections of seat surface.The advantage of this utility model is: novel uniqueness, and the reasonable in design practicality, the design is based on gently, skilful, the convenient folding mode that contracts that adopts,, weak person tourism residual with convenient old age, body and the needs of going out.
Description of drawings: Fig. 1 is a front view, dotted portion be contract the folding after view, Fig. 2 is a vertical view.In the accompanying drawing: 1, folding backrest, 2, the back vertical rod, 3, can roll over handrail, 4, the back balladeur train, 5, preceding vertical rod, 6, seat surface, 7, front carriages, 8, pedal, 9, treadle, 10, knee crutch strap, 11, treadle pull bar, 12, preceding down hinge frame, 13, front-wheel, 14, following steady rest, 15, brace, 16, back hinge frame down, 17, universal wheel, 18, the foldable base bar, 19, small extension spring.
The specific embodiment: have in the vertical rod 2 behind two preceding vertical rods 5 and two back balladeur train 4, front carriages 7, preceding hinge frame 12 down and back down 16, four pairs of decussation twistings of hinge frame brace 15 respectively with above-mentioned 4,7,12 and 16 twistings; In the front carriages 7 cover pro-vertical rods 5, back balladeur train 4 is enclosed within the vertical rod 2 of back; Between two pairs of foldable base bars 18 and the preceding vertical rod 5 and hinged between the vertical rod 2 of back, seat surface 6 is fixed on the foldable base bar 18, two pairs can to roll over handrail 3 hinged with preceding vertical rod 5 and vertical rod 2 upper ends, back, articulated folding backrest 1 between vertical rod 2 upper ends, back, on the hinge frame 16 front-wheel 13 and universal wheel 17 are housed respectively under preceding frame 12 of hinge down and the back, front-wheel 13 and the treadle 9 coaxial installations of being with pedal 8, treadle pull bar 11 two ends are articulated in respectively on treadle 9 and the front carriages 7; Cut with scissors frame 12 and back hinge frame 16 down before following steady rest 14 ends are hinged respectively down, its central authorities are provided with small extension spring 19 and 6 following connections of seat surface; Four upright supports of car body of forming by vertical rod 2 behind two preceding vertical rods 5 and two, by four faces of the rectangle that forms behind four columns, respectively by the front and back of the back front carriages 4,7 on four pairs of braces that are the decussation twisting 15 and vertical rod top and bottom down hinge frame 12,16 twistings forms, can to the center shrink and to around expansion.Front carriages 7 is through in the preceding vertical rod 5, brace 15 upper end twistings with both sides and front, back balladeur train 4 is through in the vertical rod 2 of back and the brace 15 upper end twistings of both sides and back, and two pairs of foldable base bars 18 are arranged between forward and backward two pairs of vertical rods, and seat surface 6 is riveted on forward and backward two pairs of foldable base bars 18.The two pairs of two ends that can roll over handrail 3 are hinged respectively and the downside of preceding vertical rod 5 upper ends with vertical rod 2 upper backrest positions, back, this position recedes slightly to adapt to human body sitting posture, and the upper end constitutes the handle of car to palintrope, backrest 1 is a metal framework shape structure, and two centres are hinged about branch.Can inwardly fold and rise, two side ends is fixed in vertical rod 2 tops, back by the pivot pin hinge and can rotates with physical activity.Intrinsic back hinge frame 16 and hinge in together with brace 15 lower ends of back and two sides is down adorned in back vertical rod 2 lower ends, the universal wheel 17 of strap brake is equipped with in the bottom, vertical rod 5 lower ends hinge in the other end, brace 15 lower end of front and two sides before the preceding frame 12 of hinge down was fixed on, under cut with scissors frame installed in front front-wheel 13 and treadle 9 coaxial installations, treadle 9 front ends are equipped with pedal 8, can change 90 ° around the treadle axle center and finish expansion and two orientation of folding, the lower end of treadle pull bar 11 is articulated in treadle 9 middle parts, the upper end be hinged on the front carriages 7 can with receive balladeur train when folded on move and treadle 9 closed in the car body.Following steady rest 14 is by hinge four spokes of frame in the cross and four combined revolute pairs that limit hinge frame is formed.Four limit hinge framves are individually fixed on the forward and backward frame 12,16 of hinge down and are firmly four vertical rods of decussation tractive, form stable triangular structure.In middle hinge frame upper end by small extension spring 19 tractives below seat surface 6, remain pulling force upwards, this system upwards to be received automatically when folded folded when receiving.
