CN102178585B

CN102178585B - Gravity center following wheel chair bed

Info

Publication number: CN102178585B
Application number: CN 201110075591
Authority: CN
Inventors: 周义玉; 张勇
Original assignee: HEFEI BAILANSI INTELLIGENT MACHINERY CO Ltd
Current assignee: HEFEI BAILANSI INTELLIGENT MACHINERY CO Ltd
Priority date: 2011-03-25
Filing date: 2011-03-25
Publication date: 2013-05-01
Anticipated expiration: 2031-03-25
Also published as: CN102178585A

Abstract

The invention relates to a wheel chair, in particular to a gravity center following wheel chair bed which comprises a chair back, a wheel chair cushion and a chair frame formed by two inverse U-shaped stands, wherein the inverse U-shaped stands are arranged in parallel and connected into a whole through a cross rod, the upper parts of the inverse U-shaped stands are provided with wheel chair armrests and the lower parts of the inverse U-shaped stands are provided with wheel chair legs; the inner side of the front end of the wheel chair frame is symmetrically provided with two swing rods, and the lower ends of the swing rods are hinged with two sides of the front end of the wheel chair cushion; the front end of the wheel chair cushion is hinged with a movable bracket or movable plate as the tail part of a bed board, and the rear end of the wheel chair cushion is hinged with the chair back through a rotating shaft; and two sides of the chair back are respectively provided with a contrary flexure steel frame, the middle parts of the contrary flexure steel frames are hinged with the rear sides of the wheel chair armrests, the back of the movable bracket or movable plate as the tail part of the bed board is provided with an incline supporting rod used for pushing the movable bracket or movable plate to overturn upwards, the rear end of the incline supporting rod, the bottom ends of the contrary flexure steel frames and the top end of an elastic telescopic rod hinged on the cross rod below the wheel chair armrests are hinged on a point through a pin roll. The wheel chair bed can be switched rapidly and can be used for sitting or lying.

Description

Wheel chair bed with movable centre of gravity

[technical field]

The present invention relates to a kind of wheelchair, more particularly, relate to a kind of wheel chair bed with movable centre of gravity.

[background technology]

The present wheelchair that uses of people with disability or handicapped old people is that manual or electronic (almost) all is the fixing chair back, that is to say that the angle of the chair back and seat is fixed.In a single day the people of use wheelchair takes wheelchair can only be sitting posture, of long duration very uncomfortable.And, if having a light sleep for a while at wheelchair, also can only be sitting posture.If it is movable that the chair back is made, then during chair back hypsokinesis, after the center of gravity of moving can drop on outside the bearing-surface of wheel, cause wheelchair hypsokinesis even overturning.Although everybody has recognized the fixedly drawback of chair back wheelchair for many years, consider the safety of user, nobody does the trial of movable chair back wheelchair.Although the existence of Wheel-chair type bed robot is arranged, the cost that it is expensive makes it can't obtain substantial application.

[summary of the invention]

Technical problem to be solved by this invention be to provide a kind of simple in structure, use safety, can sit the wheel chair bed with movable centre of gravity that can crouch, be convenient to user and have a rest.

Technical scheme of the present invention is: wheel chair bed with movable centre of gravity, comprise the chair back, wheel cushion and wheelchair frame, and the inboard symmetry of described wheelchair frame front end is equipped with two forks, and described fork lower end and the described cushion front end both sides of taking turns are hinged; The described cushion front end and movable tailstock support or pulldown bed tailgate of taking turns is hinged, and it is hinged by rotating shaft and the described chair back that this takes turns the cushion rear end; The contrary flexure steelframe is equipped with respectively in described chair back both sides, described contrary flexure steelframe middle part is hinged with the wheelchair armrest rear side, the back side of described movable tailstock support or pulldown bed tailgate is equipped with one and is used for promoting its resupinate hound, and cut with scissors in a bit altogether by bearing pin on described hound rear end and described contrary flexure steelframe bottom and an elastic telescopicing rod top that is articulated on the cross bar of described wheelchair armrest below.

Further improvement as such scheme, described contrary flexure steelframe middle and lower part is provided with an arc hook, described hook middle part has through hole and is fixed on the described contrary flexure steelframe with bolt, and described wheelchair armrest inboard and wheel back post are provided with alignment pin or the cross bar corresponding with described hook.When the described chair back was holded up, described hook hooked alignment pin or the cross bar on the wheel back post, and the described chair back is fixed under the upright state; In the time of need to putting down the chair back, untie hook, when treating that the chair back forwards horizontal level to, the other end with hook hangs on the alignment pin or cross bar of described wheelchair armrest inboard again, the described chair back can be fixed under the level.

As the further improvement of such scheme, described elastic telescopicing rod is socketed to form by two joint blind pipes, and described elastic telescopicing rod inner chamber is equipped with back-moving spring or elastomeric material.

Principle of the present invention is: the present invention has utilized plane four connecting rod principles, and wheelchair armrest, fork, wheel cushion and contrary flexure steelframe bottom are hinged and consist of the double rocking lever four-bar mechanism, and wherein fork and contrary flexure steelframe bottom consist of double rocking lever.The wheelchair initial position is the upright sitting posture of backboard, and this moment, system gravity was in the bearing-surface that four wheels consists of; When user unclamps locking device and topples over backward, the wheelchair backboard under the effect of user body weight hypsokinesis until flatten, with the contrary flexure steelframe of wheelchair backboard interlock around the pin joint forward swing because the characteristic of double rocking lever four-bar mechanism, the stressed movement to the front upper place with the wheelchair backboard of wheel cushion flushes; When user sat up, fork is stressed to be put behind pin joint, and cushion is stressed moves to the back lower place for wheel, with the contrary flexure steelframe of wheelchair backboard interlock also with after pendulum, the wheelchair backboard recovers the sitting posture state.In this process, the wheelchair center of gravity moves forward and backward with the wheel cushion always, and Wheel-chair type bed launches fully or when recovering sitting posture, the wheelchair center of gravity drops in the wheelchair bearing-surface all the time, and the wheelchair whole machine balancing is kept, the problem that wheelchair centre-of gravity shift can not occur and fall down.Elastic telescopicing rod has two effects, and the one, provide power-assisted when being launched into bed for described Wheel-chair type bed, play the labour-saving effect, the 2nd, described double rocking lever four-bar mechanism is retrained, increase the stability of extreme position.

The invention has the advantages that: features simple structure, can switch rapidly wheelchair state or bed state, and this chair bed is to utilize body weight for humans (amount) power to do work, a little firmly can finish handoff procedure, especially being fit to severe case, paralytic and old man uses, it is sat up in not by the external force situation voluntarily or sleep down, greatly alleviated families of patients and nursing staff's burden.

[description of drawings]

The invention will be further described in conjunction with the embodiments with reference to the accompanying drawings.

Fig. 1 is the structural representation of the present invention under the wheelchair state,

Fig. 2 is the state diagram of arc hook 4 among Fig. 1,

Fig. 3 is the structural representation of the present invention under the bed state,

Fig. 4 is the state diagram of arc hook 4 among Fig. 3.

Among the figure, 1, the chair back; 2, wheelchair frame; 3, rear transverse rod; 4, arc hook; 5, contrary flexure steelframe; 6, hound; 7, elastic telescopicing rod; 8, movable tailstock support; 9 forks; 10, wheel cushion; 11, alignment pin; 12, universal wheel; 13, manual pulley; 14, table top; 15, handle.

[specific embodiment]

Further specify the present invention below by embodiment, and the present invention is not restricted to described embodiment, all and similar of the present invention, and only be that size, position are adjusted or change person to some extent, then all belong to protection category of the present invention.

Referring to accompanying

drawing

1,3, wheel chair bed with movable centre of gravity, comprise the chair back 1, wheel cushion 10 and wheelchair frame 2, wheelchair frame 2 rear ends are provided with rear transverse rod 3, wheelchair armrest is equipped with on wheelchair frame 2 its tops, wheelchair armrest is provided with table top 14, and universal wheel 12 and manual pulley 13 are equipped with in wheelchair frame 2 bottoms, and handle 15. is equipped with at the chair back 1 back side

The inboard symmetry of wheelchair frame 2 front ends is equipped with two forks 9, and fork 9 lower ends are hinged with wheel cushion 10 front end both sides; Wheel cushion 10 front ends and movable tailstock support 8, wheel cushion 10 rear ends are hinged by rotating shaft and the chair back 1; The chair back 1 both sides are anti-loaded bent steelframe 5 respectively, contrary flexure steelframe 5 middle parts and wheelchair armrest rear side are hinged, cut with scissors on same bearing pin altogether with elastic telescopicing rod 7 upper ends that hound 6 and inside are provided with back-moving spring respectively contrary flexure steelframe 5 bottoms, elastic telescopicing rod 7 bottoms and wheelchair armrest below cross bar are hinged, can be with hound 6 swings; Elastic telescopicing rod 7 is socketed to form by two joint blind pipes, and elastic telescopicing rod 7 inner chambers are equipped with back-moving spring, also can filling elastic material, can reach effect same.Hound 6 front ends and movable tailstock support 8 back sides are hinged.

Contrary flexure steelframe middle and lower part is provided with arc hook 4, links up with 4 middle parts and has through hole and be fixed on the steelframe 5 with bolt, and the wheelchair armrest inboard is provided with and links up with 4 corresponding alignment pins 11, and wheelchair frame 2 rear portions are provided with rear transverse rod 3.When the chair back 1 was holded up, hook 4 hooked rear transverse rod 3 (as shown in Figure 2), and the chair back 1 is fixed under the upright state; In the time of need to putting down the chair back 1, untie hook 4, when treating that the chair back 1 forwards horizontal level to, will link up with again on the alignment pin 11 that 4 other end hangs over the wheelchair armrest inboard (as shown in Figure 4), the chair back 1 can be fixed under the level.

Need to prove, relativeness between each parts of describing in the accompanying drawings (comprising position relationship and magnitude relationship), only be for illustrative purposes, as long as can realize purpose of the present invention, can as required all parts be arranged on the position that needs.Such as, link up with 4, in the accompanying drawings it is arranged on the middle and lower part of contrary flexure steelframe 5, it will be understood by those skilled in the art that as required, for different purposes, it can be arranged on any position of contrary flexure steelframe 5, for example contrary flexure steelframe 5 bending sections.

Although illustrated and described embodiments of the invention, for the ordinary skill in the art, be appreciated that without departing from the principles and spirit of the present invention can change these embodiment, modification, replacement and modification, scope of the present invention is limited by claims and equivalent thereof.

Claims

1. wheel chair bed with movable centre of gravity, comprise the chair back, wheel cushion and wheelchair frame, it is characterized in that: described wheel chair bed with movable centre of gravity, comprise the chair back, wheel cushion and wheelchair frame, the inboard symmetry of described wheelchair frame front end is equipped with two forks, and described fork lower end and the described cushion front end both sides of taking turns are hinged; The described cushion front end and movable tailstock support or pulldown bed tailgate of taking turns is hinged, and it is hinged by rotating shaft and the described chair back that this takes turns the cushion rear end; The contrary flexure steelframe is equipped with respectively in described chair back both sides, described contrary flexure steelframe middle part is hinged with the wheelchair armrest rear side, the back side of described movable tailstock support or pulldown bed tailgate is equipped with one and is used for promoting its resupinate hound, and cut with scissors in a bit altogether by bearing pin on described hound rear end and described contrary flexure steelframe bottom and an elastic telescopicing rod top that is articulated on the cross bar of described wheelchair armrest below.

2. described wheel chair bed with movable centre of gravity according to claim 1, it is characterized in that: described contrary flexure steelframe middle and lower part is provided with an arc hook, described hook middle part has through hole and is fixed on the described contrary flexure steelframe with bolt, and described wheelchair armrest inboard and wheel back post are provided with alignment pin or the cross bar corresponding with described hook.

3. described wheel chair bed with movable centre of gravity according to claim 1, it is characterized in that: described elastic telescopicing rod is socketed to form by two joint blind pipes, and described elastic telescopicing rod inner chamber is equipped with back-moving spring or elastomeric material.