CN213588768U

CN213588768U - Wheelchair unfolding mechanism

Info

Publication number: CN213588768U
Application number: CN202021899098.6U
Authority: CN
Inventors: 黄鑫鑫; 林勇; 刘和玉; 朱健; 王立丹; 吕劲翔
Original assignee: Zhijiang College of Zhejiang University of Technology
Current assignee: Zhijiang College of Zhejiang University of Technology
Priority date: 2020-09-03
Filing date: 2020-09-03
Publication date: 2021-07-02
Anticipated expiration: 2030-09-03

Abstract

The utility model discloses a wheelchair unfolding mechanism, which comprises a first unfolding connecting piece, a second unfolding connecting piece, a third unfolding connecting piece and an electric push rod; the first unfolding connecting piece and the third unfolding connecting piece are L-shaped, the top points of the bent positions of the first unfolding connecting piece and the third unfolding connecting piece are respectively hinged to the front side and the rear side of the cushion supporting frame, the backrest and the leg rest are respectively and fixedly arranged on the first unfolding connecting piece and the third unfolding connecting piece, and the bottom end of the first unfolding connecting piece and the top end of the third unfolding connecting piece are respectively hinged to two ends of the second unfolding connecting piece; the electric push rod drives the second unfolding connecting piece to move back and forth. The utility model discloses can lean on the back and the leg of wheelchair to launch in step, make it flush with the cushion, the old man of being convenient for stands up or translates to the bed.

Description

Wheelchair unfolding mechanism

Technical Field

The utility model relates to an old-person assisting apparatus technical field, concretely relates to wheelchair deployment mechanism.

Background

With the increase of aging, the demand of wheelchairs on the market is more and more, and many old people are inconvenient to move, so that the old people need to be assisted by a caregiver when going to bed or get out of bed, and particularly need to go from bed to wheelchair, which is very inconvenient. The existing common wheelchair is simple in structure, when the old needs to stand up, the old needs to be held up by a person, the person who holds up needs great strength to hold up the old, the labor intensity of people is high, and the old is in risk of falling down. In addition, the elderly need to spend a relatively large amount of effort when standing up from a common wheelchair, which is difficult to stand up without being held by the elderly, and therefore, there is a need to design a mechanism for unfolding the wheelchair.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a wheelchair exhibition mechanism aims at solving the problem among the prior art that above-mentioned background art provided.

The above technical problem of the present invention can be solved by the following technical solutions: a wheelchair unfolding mechanism comprises a backrest, a cushion support frame, a leg rest, a bottom plate, front wheels and rear wheels, wherein the cushion is supported on the cushion support frame; the wheelchair unfolding mechanism comprises a first unfolding connecting piece, a second unfolding connecting piece, a third unfolding connecting piece and an electric push rod; the first unfolding connecting piece and the third unfolding connecting piece are L-shaped, the top points of the bent positions of the first unfolding connecting piece and the third unfolding connecting piece are respectively hinged to the front side and the rear side of the cushion supporting frame, the backrest and the leg rest are respectively and fixedly arranged on the first unfolding connecting piece and the third unfolding connecting piece, and the bottom end of the first unfolding connecting piece and the top end of the third unfolding connecting piece are respectively hinged to two ends of the second unfolding connecting piece; the electric push rod drives the second unfolding connecting piece to move back and forth.

The vehicle seat is further provided with a vertical vehicle seat middle rod connected to the opposite middle part of the second unfolding connecting piece, a pulley is arranged at the bottom end of the vehicle seat middle rod, and a sliding groove matched with the pulley is formed in the opposite middle part of the bottom plate along the front-back direction; the tail part of the electric push rod is fixedly arranged on the bottom plate, and the output end of the electric push rod is connected to the lower part of the middle rod of the saddle.

The bicycle is further provided with a bicycle seat bottom frame on the left side and the right side of the bottom plate respectively, a front wheel and a rear wheel connecting frame are fixedly arranged on the bicycle seat bottom frame respectively, and the front wheel and the rear wheel are arranged at the front end and the rear end of the front wheel and the rear wheel connecting frame respectively.

The seat cushion is characterized in that foldable handrails are arranged on two sides of the seat cushion respectively and comprise handrails and handrail folding rods, and two ends of each handrail folding rod are hinged to the handrails and the seat cushion supporting frame respectively.

The seat cushion is further arranged in a manner that the opposite front side of the seat cushion is hinged on the seat cushion supporting frame, and a vertical fixing rod is downwards arranged at the bottom of the opposite front end of the seat cushion supporting frame; the novel seat cushion is characterized in that a first lifting-assisting connecting rod and a second lifting-assisting connecting rod which are mutually hinged are arranged at the bottom of the opposite rear side of the seat cushion, the top end of the first lifting-assisting connecting rod is hinged to the bottom of the opposite rear side of the seat cushion, the middle of the second lifting-assisting connecting rod is hinged to the bottom end of the fixing rod, and a pedal plate is fixedly arranged at the bottom end of the second lifting-assisting connecting rod.

The further arrangement is that the front wheels are universal wheels.

A further arrangement is that the rear wheel is a large diameter hand wheel.

The further setting lies in, electric putter's specification is: the stroke is 100mm, the speed is 24mm/s, and the rated voltage is 12V.

Compared with the prior art, the utility model, its beneficial effect lies in: the utility model can synchronously unfold the backrest and the leg rest of the wheelchair to be flush with the cushion, thereby being convenient for the old to turn over or translate to the bed; the utility model discloses simple structure, it is easy and simple to handle and safe and reliable.

Drawings

Fig. 1 is a schematic view of the overall structure of the wheelchair of the present invention.

Fig. 2 is a schematic view of the unfolding structure of the wheelchair of the present invention.

Fig. 3 is a schematic side half-section view of the present invention.

Fig. 4 is a detailed schematic view of the middle pulley chute of the present invention.

Fig. 5 is a partial cross-sectional schematic view of the present invention.

Fig. 6 is a schematic view of the lifting part of the present invention.

In the figure: 100. a backrest; 200. a cushion; 300. a cushion support frame; 400. a leg rest; 500. a bottom plate 501, a saddle underframe 502 and a front and rear wheel connecting frame; 600. a front wheel; 700. a rear wheel; 800. an armrest 801, an armrest folding bar;

1. a first deployment connector; 2. a second deployment connection; 3. a third deployment link; 4. an electric push rod; 5. a first backrest connecting rod; 6. a second backrest connecting rod; 7. a first leg rest connecting rod; 8. a second leg rest connecting rod; 9. a seat intermediate lever; 10. a pulley; 11. a chute; 12. a middle block; 13. fixing the rod; 14. a first rising-assisting connecting rod; 15. a second rising-assisting connecting rod; 16. a foot pedal.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further specifically described below by way of embodiments and with reference to the accompanying drawings.

Example (b): a wheelchair deployment mechanism, as shown in fig. 1-6, the wheelchair comprises a backrest 100, a seat cushion 200, a seat cushion support 300, a leg rest 400, a bottom plate 500, front wheels 600, rear wheels 700, wherein the seat cushion 200 is supported on the seat cushion support 300, the seat cushion support 300 is supported on the bottom plate 500, and the bottom plate 500 is parallel to the seat cushion 200; the left side and the right side of the bottom plate 500 are respectively provided with a seat bottom frame 501, the seat bottom frame 501 is respectively and fixedly provided with a front wheel connecting frame and a rear wheel connecting frame 502, the front wheel 600 and the rear wheel 700 are respectively installed at the front end and the rear end of the front wheel connecting frame and the rear wheel connecting frame 502, the front wheel 600 is a universal wheel, the direction of an old man can be conveniently controlled, the rear wheel 700 is a large-diameter manual wheel, and the old man can shake the wheel with a hand. The two sides of the seat cushion 200 are respectively provided with a foldable handrail, the foldable handrail comprises a handrail 800 and two handrail folding rods 801, the two ends of the handrail folding rods 801 are respectively hinged to the handrail 800 and the seat cushion support frame 300, the handrail 800 can be folded on the two sides of the seat cushion 200 through the handrail folding rods 801, and the wheelchair can be conveniently moved out of the old from the side.

The unfolding mechanism comprises two first unfolding connecting pieces 1 which are parallel to each other, two second unfolding connecting pieces 2 which are parallel to each other, two third unfolding connecting pieces 3 which are parallel to each other and an electric push rod 4, wherein the first unfolding connecting pieces 1 and the third unfolding connecting pieces 3 are L-shaped, the top point of the bent part of each first unfolding connecting piece 1 is hinged to the opposite rear side of the cushion supporting frame 300 through a first backrest connecting rod 5, and the top point of the bent part of each third unfolding connecting piece 3 is hinged to the opposite front side of the cushion supporting frame 300 through a first leg supporting connecting rod 7; the backrest 100 is fixed on one side of the first unfolding connecting piece 1, and the other side end part of the first unfolding connecting piece 1 is hinged with one end of the second unfolding connecting piece 2 through a second backrest connecting rod 6; the leg rest 400 is fixed on one side of the third unfolding connector 3, and the other end of the third unfolding connector 3 is hinged with the other end of the second unfolding connector 2 through a second leg rest connecting rod 8.

In the above structure, the first unfolding connecting piece 1 can rotate around the first backrest connecting rod 5, so as to drive the backrest 100 to rotate, and the backrest and the seat cushion 200 form different included angles; the third unfolding link 3 can rotate around the first leg rest connecting rod 7, so as to drive the leg rest 400 to rotate, so that the leg rest and the seat cushion 200 form different included angles. The first unfolding connecting piece 1 and the third unfolding connecting piece 3 are connected through the second unfolding connecting piece 2 and can synchronously and reversely rotate, so that the included angles between the backrest 100 and the leg rest 400 and the seat cushion 200 are always kept consistent but are reversed.

In this embodiment, the opposite middle portions of the two second unfolding connectors 2 are connected together through an intermediate block 12, a vertical seat intermediate rod 9 is welded to the opposite middle portion of the intermediate block 12, a pulley 10 is disposed at the bottom end of the seat intermediate rod 9, a sliding groove 11 matched with the pulley 10 is disposed in the opposite middle portion of the bottom plate 500 along the front-rear direction, and the pulley 10 can roll in the sliding groove 11. The tail of electric putter 4 is fixed to be set up on bottom plate 500, and the output end fixed connection of electric putter 4 is in the relative lower part of saddle intermediate lever 9, and electric putter 4's specification is: the stroke is 100mm, the speed is 24mm/s, and the rated voltage is 12V. When the electric push rod 4 pushes the saddle middle rod 9 to move forward, the pulley 10 at the bottom end of the saddle middle rod 9 rolls forward along the chute 11 and drives the second unfolding connecting piece 2 to move forward, further drives the first unfolding connecting piece 1 to turn over downwards and simultaneously drives the third unfolding connecting piece 3 to turn over upwards until the backrest 100 and the leg rest 400 turn over to be horizontal, so that the old can lie on the horizontal plane formed by the backrest 100, the cushion 200 and the leg rest 400, and then the armrest 800 is folded, so that the old can turn over or move to the bed conveniently.

In this embodiment, in order to realize the function of facilitating the elderly to stand up, the opposite front side of the seat cushion 200 is hinged to the seat cushion support frame 300, and the bottom of the opposite front end of the seat cushion support frame 300 is provided with a vertical fixing rod 13 downwards; the bottom of the opposite rear side of the seat cushion 200 is provided with a first lifting-assisting connecting rod 14 and a second lifting-assisting connecting rod 15 which are mutually hinged, the top end of the first lifting-assisting connecting rod 14 is hinged to the bottom of the opposite rear side of the seat cushion 200, the opposite middle part of the second lifting-assisting connecting rod 15 is hinged to the bottom end of the fixed rod 13, and the bottom end of the second lifting-assisting connecting rod 15 is fixedly provided with a pedal 16. When the old need stand from the wheelchair, only need to step on the running-board 16 downwards slightly hard, the health leans forward a little at the same time, can drive cushion 200 and incline forward through first helping and rise connecting rod 14 and second helping and rise connecting rod 15 to reach the purpose of helping to rise.

Finally, it should be noted that the above embodiments are merely representative examples of the present invention. Obviously, the present invention is not limited to the above-described embodiments, and many modifications are possible. All changes and modifications that may be made by the technical spirit of the present invention to the above embodiments by simple modification are considered to fall within the scope of the present invention.

Claims

1. A wheelchair deployment mechanism, the wheelchair comprises a backrest, a seat cushion, a seat cushion support frame, a legrest, a bottom plate, a front wheel and a rear wheel, and the seat cushion is supported on the seat cushion support frame; it is characterized in that the wheelchair The unfolding mechanism includes a first unfolding connector, a second unfolding connector, a third unfolding connector, and an electric push rod; the first unfolding connector and the third unfolding connector are both L-shaped, and the vertices of their bends are respectively hinged On the front and rear sides of the seat cushion support frame, the backrest and the legrest are respectively fixed on the first unfolding connector and the third unfolding connector, and the bottom end of the first unfolding connector and the top end of the third unfolding connector are respectively fixed. It is hinged with both ends of the second unfolding connecting piece; the electric push rod drives the second unfolding connecting piece to move back and forth.

2 . The wheelchair unfolding mechanism according to claim 1 , wherein a vertical middle seat rod is connected to the opposite middle of the second unfolding connecting piece, and the bottom end of the middle seat rod is provided with 2 . a pulley, the relative middle of the bottom plate is provided with a chute matching the pulley along the front and rear directions; the tail of the electric push rod is fixed on the bottom plate, and the output end of the electric push rod is connected to the middle of the seat The opposite lower part of the rod.

3 . The wheelchair deployment mechanism according to claim 1 , wherein the left and right sides of the bottom plate are respectively provided with a seat base frame, and the front and rear wheel connecting frames are respectively fixed on the vehicle seat base frame. The front wheel and the rear wheel are respectively mounted on the front end and the rear end of the front and rear wheel connecting frame.

4 . The wheelchair unfolding mechanism according to claim 1 , wherein the two sides of the seat cushion are respectively provided with foldable armrests, the foldable armrests comprise an armrest and an armrest folding rod, and two of the armrest folding rods are foldable. 5 . The ends are respectively hinged to the armrest and the seat cushion support frame.

5 . The wheelchair deployment mechanism according to claim 1 , wherein the opposite front side of the seat cushion is hinged on the seat cushion support frame, and the bottom of the opposite front end of the seat cushion support frame is downwardly provided with a vertical A straight fixing rod; the bottom of the opposite rear side of the seat cushion is provided with two sections of a first lifting connecting rod and a second lifting connecting rod that are hinged with each other, and the top end of the first lifting connecting rod is hinged to the bottom of the seat cushion. Opposite to the bottom of the rear side, the relative middle portion of the second lift-up connecting rod is hinged to the bottom end of the fixing rod, and the bottom end of the second lift-up connecting rod is fixedly provided with a foot pedal.

6 . The wheelchair deployment mechanism according to claim 1 , wherein the front wheel is a universal wheel. 7 .

7 . The wheelchair deployment mechanism according to claim 1 , wherein the rear wheel is a large-diameter hand wheel. 8 .

8 . The wheelchair deployment mechanism according to claim 1 , wherein the specifications of the electric push rod are: a stroke of 100 mm, a speed of 24 mm/s, and a rated voltage of 12 V. 9 .