TWI495461B - Integrated sitting, standing, rearward electric wheelchair - Google Patents

Description

Integrated electric wheelchair for sitting, standing and leaning

The invention relates to an electric wheelchair integrated with sitting, standing and backward tilting, in particular to an electric wheelchair with integrated lifting, standing and backward tilting with a lifting mechanism, which has the advantages of simple operation, good stability, back tilting and pressure relief, Promote blood circulation and lower cost and other advantages and effects.

At present, most of the electric wheelchairs that integrate the three functions of sitting, standing, and backward tilting require two power sources. For example, in the ninth figure, the Republic of China Patent Bulletin No. 563530 can electrically adjust the seat lift, rotate, The translating and reclining type of the inverting type of wheelchair uses the two electric cylinders 91 to drive the seat back 92 and the footrest bracket 93 respectively to achieve structural changes of sitting and lying.

In the aspect of lifting and lowering, a lifting gear 94 is used to drive a transmission gear 95 to rotate. The transmission gear 95 drives the lifting gear 97 to rotate via a transmission gear chain 96, thereby driving the lifting rod 98 to move relative to the fixed column 981 to make a skeleton. 99 moves up and down with respect to a wheelchair outer frame 90A to obtain a lifting function of the wheelchair.

It can be seen that the conventional technology of the indexable wheelchair that can electrically adjust the seat lifting, rotating, translating and lying functions requires two electric cylinders to be driven in the structural change of sitting and lying, and requires a lifting in lifting. The motor 94 is not only complicated in design, but also requires multiple power sources to drive, and the manufacturing cost is relatively high.

Therefore, it is necessary to develop new products to solve the above shortcomings and problems.

The object of the present invention is to provide an electric wheelchair integrated with sitting, standing and backward tilting, which has the advantages and functions of simple operation, good stability, backward tilting pressure, promoting blood circulation and low cost, and is used for solving the conventional knowledge. Technology requires multiple sources of power and high manufacturing costs.

The technical means for solving the above problems is to provide an integrated electric wheelchair for sitting, standing and reclining, comprising: a back having a back connecting portion; the back connecting portion having an upper end, a lower end, and a first a pivoting portion and an extension rod; the first pivoting portion is disposed between the upper end and the lower end, the extension rod is fixed on the back connecting portion and substantially at an angle of 90 degrees to the back connecting portion Extending outwardly, and extending the end has an extending pivoting portion; a supporting step having a supporting step pivoting end, a step connecting end, a stepping portion and a supporting pivoting portion; The base is fixed at the connecting end of the step, and the supporting pivoting portion is disposed between the pivoting end of the supporting step and the connecting end of the step; a base having a bracket portion, a movable wheel set, a rail portion, a sliding portion and a lifting mechanism; the bracket portion has a front end, a rear end, a first bracket pivoting portion and a second bracket pivoting portion, the first bracket pivoting portion is fastened to The second bracket pivoting portion is pivoted between the front end and the rear end a rear end; the movable wheel set is disposed on the bracket portion; the rail portion is fixed on the bracket portion and is substantially horizontal; the sliding portion is slidably disposed on the rail portion, and has two ends The first sliding pivoting portion and the second sliding pivoting portion extend downwardly with a connecting portion; and the lifting mechanism is pivotally disposed on the second bracket pivoting portion and has a lifting component, the lifting component is a connecting portion connected to the sliding portion; the lifting member is expandable and contractible on the lifting mechanism and has at least an extended position, a middle position and a retracted position, thereby driving the sliding portion 34 to move on the track portion; a seat portion having two ends, one end of which is pivotally connected to the first pivoting portion of the back portion, and the other end of which is pivotally connected to the pivoting end of the supporting step portion of the supporting step portion and the first sliding portion of the sliding portion a pivoting portion; the seat portion has a linkage pivoting portion; a linkage assembly having a first connecting rod, a second connecting rod and a limiting rod; the first connecting rod has two ends, respectively Connecting the lower end of the back connecting portion and the supporting pivoting portion of the supporting step; the second connecting rod has two ends, respectively extending the extending pivoting portion of the extending rod and the second sliding pivoting portion of the sliding portion And the limiting rod has two ends respectively pivotally connected to the linking pivoting portion of the seat portion and the first bracket pivoting portion of the bracket portion; thereby, when the lifting element of the lifting mechanism is located at the extended position, The sliding portion is located at the first position on the rail portion, and the back portion of the pivoting joint, the supporting step portion and the seat portion are in a backward tilting state; when the lifting member of the lifting mechanism is extended to the middle portion from the extended position Positioning, driving the sliding portion from the first position on the rail portion The rear end direction is moved to a second position, and the back, the support step, the seat portion and the linkage assembly are interlocked, so that the back, the support step and the seat portion which are mutually pivotally connected are changed from the backward tilt state When the lifting element of the lifting mechanism is extended from the middle position to the retracted position, the sliding portion is moved from the second position on the track portion to the rear end direction to a third position And the position, and the supporting step, the seat portion and the linkage assembly are interlocked, so that the back, the supporting step and the seat portion that are pivotally connected to each other are converted from the seat state to the upright deployed state.

The above objects and advantages of the present invention will be readily understood from the following detailed description of the preferred embodiments illustrated herein.

The invention will be described in detail in the following examples in conjunction with the drawings:

10‧‧‧ Back

11‧‧‧ Back joint

11A‧‧‧Upper

11B‧‧‧Bottom

111‧‧‧First pivotal

112‧‧‧Extension rod

112A‧‧‧Extended pivotal joint

20‧‧‧Support step

21‧‧‧Supporting the pivoting end of the tread

22‧‧‧Treading end

23‧‧‧Steps

24‧‧‧Support pivot

30‧‧‧Base

31‧‧‧ bracket

31A‧‧‧ front end

31B‧‧‧ Backend

311‧‧‧First bracket pivoting

312‧‧‧Second bracket pivoting

32‧‧‧Active Wheels

321‧‧‧ activity wheel

33‧‧‧Track Department

34‧‧‧Sliding section

341‧‧‧First sliding pivot

342‧‧‧Second sliding pivot

343‧‧‧Connecting Department

35‧‧‧ Lifting mechanism

351‧‧‧ lifting element

40‧‧‧ seat

41‧‧‧ linkage pivotal joint

50‧‧‧ linkage components

51‧‧‧first connecting rod

52‧‧‧Second link

53‧‧‧Bars

P1‧‧‧Extended location

P2‧‧‧ mid-section

P3‧‧‧Retracted position

P11‧‧‧ first position

P12‧‧‧ second position

P13‧‧‧ third position

The first figure is a schematic diagram of the integrated electric wheelchair for sitting, standing and leaning backward according to the present invention.

2A is a schematic view of a partial cross-sectional view of the present invention

2B is a schematic view of a partial cross-sectional view of the present invention

The third figure is a schematic diagram of the interlocking relationship of the components of the present invention.

The fourth figure is a side view of the interlocking relationship of the components of the present invention.

The fifth figure is an exploded view of the seat and the restraining rod of the present invention.

Figure 6A is a schematic diagram of the post-dip state of the present invention

Figure 6B is a schematic cross-sectional view of the post-dip state of the present invention

Figure 7A is a schematic view of the sitting state of the present invention

Figure 7B is a schematic cross-sectional view of the sitting posture of the present invention

Figure 8A is a schematic view of the standing state of the present invention

Figure 8B is a schematic cross-sectional view of the standing state of the present invention

The ninth diagram is a schematic diagram of a conventional technique

As shown in the first to fifth figures, the present invention is an integrated electric wheelchair that sits, stands, and leans, and includes: a back 10, a support step 20, a base 30, a seat 40, and a linkage assembly. 50.

The back portion 10 has a back connecting portion 11; the back connecting portion 11 has an upper end 11A, a lower end 11B, a first pivoting portion 111 and an extension rod 112; the first pivoting portion 111 is Between the upper end 11A and the lower end 11B, the extension rod 112 is fixed to the back connecting portion 11 and extends outwardly at an angle of 90 degrees to the back connecting portion 11 and extends. The end has an extended pivot portion 112A.

The supporting tread portion 20 has a supporting step pivoting end 21, a step connecting end 22, a step portion 23 and a supporting pivoting portion 24; the step portion 23 is fixed to the step connecting end 22, and The support pivoting portion 24 is disposed between the supporting step pivot end 21 and the step connecting end 22 .

The base 30 has a bracket portion 31, a movable wheel set 32, a rail portion 33, a sliding portion 34 and a lifting mechanism 35. The bracket portion 31 has a front end 31A, a rear end 31B, and a rear end. The first bracket pivoting portion 311 and the second bracket pivoting portion 312 are disposed between the front end 31A and the rear end 31B, and the second bracket pivoting portion 312 is pivoted The rear wheel 31B is disposed on the bracket portion 31; the rail portion 33 is fixed to the bracket portion 31 and substantially horizontal; the sliding portion 34 is slidably disposed on the rail And a second sliding pivoting portion 341 and a second sliding pivoting portion 342, and a connecting portion 343 extending downward; and the lifting mechanism 35 is pivotally disposed on the second bracket The lifting portion 351 is connected to the connecting portion 343 of the sliding portion 34. The lifting member 351 is expandable and contractible on the lifting mechanism 35 and has at least one extended position P1. a middle position P2 and a retracted position P3, thereby driving the sliding portion 34 to move on the rail portion 33 (refer to the sixth B) VII B and VIII B).

The seat portion 40 has two ends, one end of which is pivotally connected to the first pivoting portion 111 of the back portion 10, and the other end of which is pivotally connected to the supporting step pivoting end 21 of the supporting step portion 20 and the sliding portion 34 The first sliding pivoting portion 341; the sitting portion 40 has a linkage pivoting portion 41.

The linkage assembly 50 has a first link 51, a second link 52, and a limiting rod 53. The first link 51 has two ends, respectively pivoted to the lower end 11B of the back connecting portion 11 and the Supporting the pivoting portion 24 of the step 20; the second link 52 has two ends, respectively pivotally extending the extension The extending pivot portion 112A of the rod 112 and the second sliding pivot portion 342 of the sliding portion 34; and the limiting rod 53 has two ends, respectively pivotally connecting the pivoting portion 41 of the seat portion 40 and the bracket portion 31 The first bracket pivoting portion 311.

Therefore, when the lifting element 351 of the lifting mechanism 35 is located at the extended position P1, the sliding portion 34 is located at the first position P11 on the rail portion 33, and the back portion 10 that is pivotally coupled to each other, the supporting step portion 20 And the seat portion 40 is in a backward tilting state; when the lifting element 251 of the lifting mechanism 35 is extended to the middle position P2 by the extending position P1, the sliding portion 34 is driven by the first position on the rail portion 33. The P11 is moved to the second position P12 in the direction of the rear end 31B, and the back 10, the support tread portion 20, the seat portion 40 and the linkage assembly 50 are interlocked, so that the back 10 and the support tread portion are pivotally connected to each other. 20 and the seat portion 40 is changed from the rearward tilting state to the seat state; and when the lifting member 351 of the lifting mechanism 35 is expanded and contracted from the middle position P2 to the retracted position P3, the sliding portion 34 is driven by the rail portion The second position P12 on the 33 is moved to the third position P13 in the direction of the rear end 31B, and the back 10, the supporting tread portion 20, the sitting portion 40 and the linkage assembly 50 are interlocked to pivot the back of each other. 10. The support step 20 and the seat 40 are converted from a seat state to a straight position. The expanded state (refer to sixth B, seventh and eighth B Figure B).

In design, the movable wheel set 32 can have a plurality of movable wheels 321 disposed on the front end 31A and the rear end 31B in an average to maintain the stability of the wheelchair.

In the embodiment of the present invention, the connecting portion 343 of the sliding portion 34 is designed as a cross bar, and the lifting member 35 of the lifting mechanism 35 is generally stretched in the horizontal direction (that is, substantially parallel to the rail portion 33). Further, the sliding portion 34 is moved on the rail portion 33 in accordance with the expansion and contraction of the elevating member 35.

In the embodiment of the present invention, the back connecting portion 11 and the pivoting end of the supporting step portion The tread portion connecting end 22, the supporting pivoting portion 24, the first bracket pivoting portion 311, the rail portion 33, the first sliding pivot portion 341, the second sliding pivot portion 342, and the linkage The pivoting portion 41, the first link 51, the second link 52, and the restricting rod 53 are designed to be symmetrical on the left and right sides. In each of the illustrations, some of the components may be presented only by the illustrated viewing angle. One side is out, therefore, the invention is numbered on the left and right symmetrical elements, and the system one only indicates one side.

In more detail, the rear end 31B of the bracket portion 31 is substantially vertical, and the lifting mechanism 35 is a telescopic mechanism (for example, a pneumatic cylinder or a hydraulic cylinder), and the lifting mechanism 35 is caused by expansion and contraction. The lifting element 351 is movable to the extended position P1, the middle position P2 and the retracted position P3; the lifting element 351 of the lifting mechanism 35 is moved to different positions such as the extended position P1, the middle position P2 and the retracted position P3, respectively. During the process, the lifting mechanism 35 pivots about the second bracket pivoting portion 312 and forms a first angle θ 1 , a second angle θ 2 , and a third angle with the rear end 31B . θ 3 , and the first included angle θ 1 > a second included angle θ 2 > a third included angle θ 3 (see FIGS. 6B, 7B, and 8B).

The detailed operation process of the present invention is as follows: a backward tilting state: as shown in the sixth and sixth B diagrams, when the lifting member 351 of the lifting mechanism 35 is located at the extended position P1, the sliding portion 34 is The first position P11 is located on the rail portion 33, and the back portion 10, the support step portion 20 and the seat portion 40 that are pivotally connected to each other are in a backward tilt state; at this time, the user can sit on the seat portion 40. And then rely on the back of the back 10, to reach the reclining posture.

Seat state: As shown in FIGS. 7A and 7B, when the lifting element 251 of the lifting mechanism 35 is expanded and contracted from the extended position P1 to the middle position P2, the sliding portion 34 is driven by the rail portion 33. The first position P11 is moved to the second position P12 in the direction of the rear end 31B, and the back 10, the support tread portion 20, the sitting portion 40 and the linkage assembly 50 are interlocked to pivot the back of each other. 10. The support tread portion 20 and the seat portion 40 are converted into a seat state from a rearward tilting state (that is, the seat portion 40 is changed from a tilt to a substantially horizontal position, and the back portion 10 and the support step portion 20 are changed from a tilt to a tilted state. Generally speaking, it is perpendicular to the seat 40; at this time, the user is in a normal sitting position.

Standing state: as shown in FIGS. 8A and 8B, when the lifting element 351 of the lifting mechanism 35 is expanded and contracted from the middle position P2 to the retracted position P3, the sliding portion 34 is driven by the rail portion 33. The second position P12 is moved to the third position P13 in the direction of the rear end 31B, and the back 10, the support tread portion 20, the seat portion 40 and the linkage assembly 50 are interlocked, so that the back 10 is pivotally connected to each other. The support tread portion 20 and the seat portion 40 are changed from a seat state to an upright unfolded state, thereby assisting the user to change from a sitting posture to standing (the back portion 10, the support tread portion 20, and the seat portion 40 are fully deployed and close to each other). The erect state; wherein the back portion 10, the support tread portion 20 is substantially vertical, and the seat portion 40 is inclined but close to an upright state; at this time, the user is in a standing state.

In the design of the lifting mechanism 35, it can be an electric cylinder, which is driven by a linear telescopic movement and pivoted on the second bracket pivoting portion 312 to drive the seat 40 to interlock between the mechanisms; Due to the linear action, the electric cylinder exerts a small force, which can effectively reduce the power loss; in addition, the lifting mechanism 35 can be controlled by a controller.

As can be seen from the above description, when the present invention is tilted backward, the back 10 series will be inclined backward, and the sitting portion 40 can also be rotated downward by an oblique angle (for example, 45 degrees), so that people can relax in this posture. In addition, the present invention can assist the user to perform the operation of standing and reclining (rolling) functions independently without the assistance of others, and can solve the problem of most wheelchair users. Take the problem of standing on your own.

In addition, there are not many electric wheelchairs that integrate the three functions of sitting, standing and back tilting, and most of them need to use two power sources. If the mechanism type can be changed, the power source can be reduced, but the same effect and stability can still be achieved. , it can reduce the manufacturing cost of the control device, and also prevent the danger caused by the damage of the control device. In addition, the maximum accident caused by the use of the wheelchair is the overturning and falling, including the reach of the hand. The traditional standing wheelchair must be borrowed after standing. The weight of the car body or the auxiliary wheel makes the center of gravity between the two wheels. Therefore, the main purpose of this study is to change the type of mechanism so that its center of gravity is between the two axles when standing. In addition, the reclining (squeezing) type of wheelchair must also slide the seat cushion forward when the rear tilting (squeezing) motion is performed, so that the center of gravity is located between the two axles when the vehicle is tilted backward.

In summary, the advantages and effects of the present invention can be summarized as follows:

[1] The operation is simple. The invention only needs to control the lifting mechanism 35 to achieve movement changes such as back tilt, sitting, standing, etc., and the user can complete the self without the assistance of others, so the utility model has the advantages of simple operation.

[2] Good stability. The lifting mechanism 35 of the present invention drives the pivoting mechanisms to interlock. When the three kinds of changes, the overall center of gravity is still located between the front end 31A and the rear end 31B, so that the stability is good.

[3] Back pressure and pressure. When the invention is tilted backward, the back 10 and the seat 40 are tilted backwards and downwards respectively, so that the person can relax and obtain the effect of rolling.

[4] promote blood circulation. The wheelchair of the present invention can assist the user to stand and promote the blood circulation of the user, and can effectively solve the problem that the general wheelchair user is difficult to stand on his own and stays in the wheelchair for a long time and is prone to poor blood circulation.

[5] The cost is lower. Conventional technology for electrically adjustable seat lift, rotation, and flat In the case of the shifting type of wheelchair, the structure of sitting and lying requires two electric cylinders to drive, and a lifting motor 94 is needed for lifting and lowering. This design is driven by multiple power sources to drive the wheelchair. The manufacturing cost is also relatively high; and the invention can perform the actions of back tilting, sitting and standing by a single lifting mechanism 35, and the manufacturing cost is relatively low.

The present invention has been described in detail with reference to the preferred embodiments of the present invention, without departing from the spirit and scope of the invention.

From the above detailed description, it will be apparent to those skilled in the art that the present invention can achieve the foregoing objects, and the invention has been in accordance with the provisions of the patent law.

10‧‧‧ Back

11‧‧‧ Back joint

11A‧‧‧Upper

11B‧‧‧Bottom

112‧‧‧Extension rod

112A‧‧‧Extended pivotal joint

20‧‧‧Support step

21‧‧‧Supporting the pivoting end of the tread

22‧‧‧Treading end

23‧‧‧Steps

30‧‧‧Base

31‧‧‧ bracket

31A‧‧‧ front end

31B‧‧‧ Backend

311‧‧‧First bracket pivoting

321‧‧‧ activity wheel

33‧‧‧Track Department

34‧‧‧Sliding section

341‧‧‧First sliding pivot

342‧‧‧Second sliding pivot

343‧‧‧Connecting Department

35‧‧‧ Lifting mechanism

351‧‧‧ lifting element

40‧‧‧ seat

41‧‧‧ linkage pivotal joint

51‧‧‧first connecting rod

52‧‧‧Second link

53‧‧‧Bars

Claims (3)

An electric wheelchair for standing and reclining, comprising: a back having a back connecting portion; the back connecting portion having an upper end, a lower end, a first pivoting portion and an extending rod; the first pivoting The extension is disposed between the upper end and the lower end, and the extension rod is fixed on the back connection portion and extends outwardly at an angle of 90 degrees to the back connection portion, and the extended end has an extended pivotal connection a supporting step portion having a supporting step pivot end, a step connecting end, a step portion and a supporting pivot portion; the step portion is fixed to the step connecting end, and the supporting pivot The joint is disposed between the pivot end of the support step and the connecting end of the step; a base having a bracket portion, a movable wheel set, a track portion, a sliding portion and a lifting mechanism; the bracket The front portion has a front end, a rear end, a first bracket pivoting portion and a second bracket pivoting portion. The first bracket pivoting portion is disposed between the front end and the rear end, and the second bracket pivot The connecting portion is pivotally disposed at the rear end; the movable wheel set is disposed on the bracket portion; the track portion is Positioned on the bracket portion and substantially horizontal; the sliding portion is slidably disposed on the rail portion, and has a first sliding pivot portion and a second sliding pivot portion at both ends, and extends downward a lifting portion is pivotally disposed on the second bracket pivoting portion and has a lifting element coupled to the connecting portion of the sliding portion; the lifting member is detachable on the lifting mechanism Retracting and having at least one extended position, a middle position and a retracted position, thereby driving the sliding portion to move on the rail portion; a seat portion having two ends, wherein one end is pivotally connected to the first pivoting of the back And the other end is simultaneously pivotally connected to the supporting step pivoting end of the supporting step and the first sliding pivoting portion of the sliding portion; the sitting portion has a linkage pivoting portion; a linkage assembly having a first link, a second link and a limiting rod; the first link has two ends, respectively pivotally connecting the lower end of the back connecting portion and the supporting pivot of the supporting step The second link has two ends respectively pivotally connected to the extending pivoting portion of the extending rod and the second sliding pivoting portion of the sliding portion; and the limiting rod has two ends respectively pivotally connected to the seat a first pivoting portion of the connecting portion and the first bracket pivoting portion of the bracket portion; thereby, when the lifting member of the lifting mechanism is located at the extended position, the sliding portion is located at the first position on the rail portion, and mutual The back of the pivotal linkage, the supporting step and the seat are in a backward tilting state; when the lifting element of the lifting mechanism is extended from the extended position to the middle position, the sliding portion is driven by the rail portion Moving the first position toward the rear end direction to a second position, thereby interlocking the back, the support tread portion, the seat portion and the linkage assembly, so as to pivotally link the back, the support tread portion and the seat portion From the backward tilt state to the seat state; and when the lift When the lifting element is stretched from the middle position to the retracted position, the sliding portion is moved from the second position on the track portion to the rear end direction to a third position, thereby interlocking the back and the support The step portion, the seat portion and the linkage assembly are configured such that the back portion, the support step portion and the seat portion that are pivotally connected to each other are converted from an seat state to an upright deployed state. The electric wheelchair for integrating sitting, standing, and backward tilting as described in claim 1, wherein the lifting mechanism is an electric cylinder. The electric wheelchair for integrating the sitting, standing, and backward tilting as described in claim 1, wherein the connecting portion of the sliding portion is a cross bar, and the lifting member of the lifting mechanism is generally extended and contracted in a horizontal direction, thereby The sliding portion slides on the rail portion as the lifting member expands and contracts.