DE202007018454U1 - Raising wheelchair with anatomical back compensation - Google Patents

Abstract

Stand-up wheelchair with a chassis (40) and one at the front of the chassis (40) fixed Aufrichtgestell (41), with the one at the front part (5, 20) of the chassis (40) pivotally mounted seat (10) is, via an actuator (6) from a sitting position can be brought into a standing position, one hinged to the seat (10) associated backrest (24) with a back cushion (14), and pivotable with at least one below the seat (10) at the front part (5, 20) of the chassis (40) arranged articulated parallelogram (45), wherein the rear end of the seat (10) and the lower end the backrest (24) with the same lever (8) in the articulated parallelogram (45) are connected, characterized in that the axis of rotation (15) of the seat (10) assumes a different position on the chassis (40) as the axis of rotation (19) of the articulated parallelogram (45).

Description

The Invention relates to a Aufrichtrollstuhl with a chassis and a erecting frame attached to the front part of the chassis, with a pivotally mounted on the front part of the chassis Seat is connected, via an actuator from a sitting position can be brought into a standing position, one hingedly connected to the seat Backrest with a backrest cushion, and with at least one below the seat swiveling at the front Part of the chassis arranged articulated parallelogram, in which the rear end of the seat and the lower end of the backrest are connected with the same lever in the articulated parallelogram.

Such Aufrichtrollstuhl is for example from the EP 0 815 822 B1 known.

The above a long-term sedentary posture a wheelchair user leads to the physical degradation of bodily functions, such as reduced mobility of the lower limbs, Slowing intestinal activity and worsening the blood circulation. By sitting exists as well the risk of pressure ulcers. A sit-up wheelchair helps with these consequences to reduce, as by changing the posture, to standing, the degradation of body functions reduced becomes. The swiveling seat is equipped with backrest and footrest mounted on a chassis. The correct one Adaptation to the anatomical requirements of the user is a very important criterion for the comfort that the wheelchair offers.

Standing wheelchairs also offer the user the opportunity to be sporty to press. For example, the disabled person can play golf play. In such a case it is particularly important that the Wheelchair in the erect position a high stability offers. For example, a requirement is that the footrest gets up in the erect position on the ground or supported on it. The backrest must be parallel standing to the seat and the golfer must have enough exercise (Turning of the upper body) are commanded to strike to be able to swing.

At the Change from the sitting position to the standing position (and vice versa) retains the backrest by means of a mechanism their vertical position. If the axis of rotation of the backrest and the (bony) axis of the hip joint of the User's collapse becomes a shearing motion between the body the user and the backrest (shirt-pull-out effect) avoided. The axes of rotation usually do not coincide. To avoid the shearing motion is in the known wheelchair the backrest cushion relative to the backrest slidable and so connected to the seat that it is accordingly the angle of inclination of the seat is shifted in the vertical direction.

Of the known Aufrichtrollstuhl is not only expensive in construction and thus expensive in the production, but by the necessary Connecting lever between the backrest cushion and the seat creates a disturbing edge in the area of the seat, the transfer of the disabled in the wheelchair in or out the wheelchair laterally impaired.

From the US 5,366,036 a Aufrichtrollstuhl is known in which the backrest cushion is also slidably mounted on the backrest and is moved via a lever connected to the footrest during the erection movement. Because the lever must be passed under the wheelchair seat, it is very curved and very clunky. The connection of the lever to the seat back is very complicated.

From Based on this problem, the described Aufrichtrollstuhl be improved.

to Problem solving is a generic Aufrichtrollstuhl characterized in that the axis of rotation of the seat a assumes another position on the chassis than the axis of rotation of the articulated parallelogram.

Thereby, that the two axes of rotation do not coincide, the back adjustment an independent articulated parallelogram on and the seat moves independently from this articulated parallelogram. This can cause an offset between the seat and the seat when erecting Be adjusted backrest, which leads that is the vertical distance between the seat surface (the seat) and the backrest pad changed, without the backrest cushion moves against the backrest. The seat is not an element of the articulated parallelogram. The construction is so much easier and the production of the wheelchair therefore cheaper.

Preferably, the Gelenkparallelogramm is attached to an upper attachment point and a lower attachment point on the chassis and the vertical distance is variable between the attachment points, preferably adjustable. As a result, when cornering (adjustment of the seat angle β), the seat and the backrest perform an angular movement, so that the originally set backrest inclination relative to the seat is increased, which means that no additional forces acting on the patient. He is so in a negative adjustment of Seat angle to the rear not "pinched".

to Change in the vertical distance of the attachment points the chassis is telescopic trained and the upper attachment point the first telescopic part and the lower attachment point to the attached second telescopic part.

Especially It is advantageous if the frame of the chassis at this point is designed as a telescopic tube.

to Carrying out the erection movement is preferably the actuator attached directly to the seat or the articulated parallelogram.

to Increasing the comfort, it is advantageous if the angle of inclination the backrest is adjustable. For adjusting the inclination angle can be provided at least one actuator, preferably with one of its ends on the same lever in the at least one articulated parallelogram is attached as the lower end of the backrest.

Of the Seat is arranged on a seat plate, which is used for seat depth adjustment along with the substantially parallel to the bottom of the seat extending levers of the articulated parallelogram is telescopic. When adjusting the seat depth is a guide plate, the connected to the seat is offset by the same amount.

With Help a drawing is an embodiment of the Invention will be described in more detail below. It shows:

1 - A wheelchair in side view;

2 - The side view of the attached to the chassis raising rack in the sitting position;

3 - The side view of the attached to the chassis raising rack in the standing position;

4 - the representation after 2 with tilted seat.

The wheelchair consists of the chassis 40 with the erecting rack mounted thereon 41 , the drive wheels 42 and the two steerable front wheels 43 , The erecting rack 41 has a seat 10 , a backrest 24 and a footrest 44 on. About an actuator 6 can the erecting rack 41 be pivoted, the seat of the seat 10 gets into a vertical position. The backrest 24 maintains its vertical position and then stands parallel to the seat surface of the seat 10 , Simultaneously with the tilting of the seat 10 becomes the footrest 44 lowered. The front part of the erecting rack 41 also forms the front part of the chassis 40 ,

The front part of the chassis 40 is formed by the two guide racks 20 in which each one guide column 5 is mounted sliding and infinitely adjustable. This is in the guide frame 20 integrated an unillustrated actuator, which is the guide column 5 emotional. The seat 10 is around the axis 15 pivotable on the guide column 5 attached. Below the seat 10 is one of the levers 1 . 2 . 4 and 8th existing joint parallelogram 45 arranged at the top of the one with the guide post 5 attached bearing plate 28 connected is. On a pivotally mounted on the guide frame 20 fasten bearing plate 22 arranged lever 3 is the articulated parallelogram 45 down with the chassis 40 connected. The back end of the seat 10 is at the pivot point 17 with the levers 8th and 2 connected.

On the bottom of the seat 10 is a split seatpan 31 provided with a guide 7 is provided on the lever 2 rests and a mounting plate 11 for the actuator 6 having. At the guide plate 31 is one end of the actuator 6 attached, with the other end to the guide frame 20 attached bearing plate 9 is articulated. Will the actuator 6 telescoped, the in 2 shown sitting position in the in 3 transferred standing position shown. It is by means of Gelenkparallelogramms 45 the backrest 24 on the backrest cushion 14 firmly attached, tracked. This is the actuator 6 around the axis of rotation 30 on the mounting plate 11 and the rotation axis 29 on the bearing plate 9 pivoted.

The lower lever 1 and the upper lever 2 are divided into two parts. The two parts 1a . 1b and 2a . 2 B are provided with mutually corresponding holes through which the levers 1a . 1b and 2a . 2 B adjustable in length can be screwed together. The distance of the hinge points 16 - 18 respectively. 17 - 19 is thus also adjustable, as the length of the seat plate 31 , The lever forming the back plate 8th of the articulated parallelogram 45 forms the joint points 16 - 17 , At the lever 8th is also the backrest 24 at the pivot point 23 and the actuator 12 at the pivot point 27 tethered. The backrest 24 pivots around the pivot point 23 , The levers 3 and 4 form the pivot point 18 on which also the lever 2 is arranged.

From the in 2 seat position shown, home position, generally starts erecting. By extending the actuator 6 the distance between the points of articulation changes 29 and 30 so that the seat 10 around the axis of rotation 15 pivoted. The points of articulation remain 18 . 19 . 21 the lever 3 . 4 in their position. The articulated parallelogram 45 moves together with the seat 10 , Over the lower lever 1 with the hinge points 16 and 18 is thereby the vertical orientation of the backrest 24 maintained. It is said that the lever 1 the backrest 24 erects. With the help of the upper lever 2 becomes the backrest 24 with the hinge point 17 the leadership 7 positioned. Due to the different distances between the points of articulation 15 - 17 respectively. 17 - 19 slides when erecting the hinge points 17 in the lead 7 forward. At the same time, the distance between the backrest 24 and the seat of the seat 10 shortened. So there is an anatomical back compensation, which is a shear movement between the backrest cushion 14 and excludes the patient's back.

To the inclination angle β of the seat 10 set, the vertical distance y of the hinge points 19 . 21 to be changed. For this purpose, the trained as a pipe guide columns 5 and the guide frames 20 telescoped. Will the distance y by pulling out the guide column 5 from the guide frame 20 increased by the amount x, the seat tilts around the hinge point 30 pivoting to the rear (cf. 4 ). At the same time, the angle α between the backrest also changes 24 and the seat 10 because also the location of the hinge point 18 is changed. The increasing angle α leads to a better pressure relief for the upper body of the patient and thus to a reduction of pressure ulcer. For further relief, the inclination angle γ of the backrest 24 with the help of the actuator 12 to be changed. By telescoping the actuator 12 occurring change in the distance of the points of articulation 26 and 27 to each other, the backrest turns 24 around the hinge point 23 , The inclination angle γ of the backrest 24 can also be changed by the vertical distance y by a displacement of the mounting plate 22 is changed. Also a change in length of the lever 3 or 4 causes a change in the inclination angle γ. The same can be achieved if the actuator 6 is replaced by a hinged strut.

When folding (changing the seat angle), the guide column moves 5 with the rotation axis 15 . 19 and the mounting plate 28 in the guide frame 20 up. The seat pivots about the axis of rotation 30 , For the back angle is the position of the mounting plate 22 . 21 or the length z of the lever 3 decisive.

1

lever

1a

lever member

1b

lever member

2

lever

2a

lever member

2a

lever member

3

lever

4

lever

5

guide column

6

actuator

7

guide plate

8th

lever

9

bearing plate

10

Seat

11

mounting plate

12

actuator

13

mounting plate

14

back pad

15

axis of rotation

16

fulcrum

17

fulcrum

18

fulcrum

19

fulcrum

20

guide frame

21

fulcrum

22

mounting plate

23

fulcrum

24

backrest

26

fulcrum

27

fulcrum

28

mounting plate

29

fulcrum

30

fulcrum

31

seat plate

40

chassis

41

stand-up

42

drive wheel

43

steering wheel

45

articulated

x

distance

y

distance

α

angle between seat and backrest

β

seat angle

γ

tilt angle the backrest

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• - EP 0815822 B1 [0002]
• US 5366036 [0007]

Claims (12)

Raising wheelchair with a chassis ( 40 ) and one at the front of the chassis ( 40 ) mounted erecting rack ( 41 ), with the one at the front ( 5 . 20 ) of the chassis ( 40 ) pivotally mounted seat ( 10 ) connected via an actuator ( 6 ) is brought from a sitting position to a standing position, a hinged to the seat ( 10 ) associated backrest ( 24 ) with a back pad ( 14 ), and at least one below the seat ( 10 ) pivotable on the front part ( 5 . 20 ) of the chassis ( 40 ) arranged articulated parallelogram ( 45 ), the rear end of the seat ( 10 ) and the lower end of the backrest ( 24 ) with the same lever ( 8th ) in the articulated parallelogram ( 45 ), characterized in that the axis of rotation ( 15 ) of the seat ( 10 ) another position on the chassis ( 40 ) assumes as the axis of rotation ( 19 ) of the articulated parallelogram ( 45 ). Raising wheelchair according to claim 1, characterized in that the articulated parallelogram ( 45 ) with an upper attachment point ( 19 ) and a lower attachment point ( 21 ) on the chassis ( 40 ) and the vertical distance (y) between the attachment points ( 19 . 21 ) is changeable. Raising wheelchair according to claim 2, characterized in that that the vertical distance (y) is adjustable. Erecting wheelchair according to one of claims 1 to 3, characterized in that the actuator ( 6 ) at the seat ( 10 ) is attached. Erecting wheelchair according to one of claims 1 to 3, characterized in that the actuator ( 6 ) on the articulated parallelogram ( 45 ) is attached. Erecting wheelchair according to one or more of the preceding claims, characterized in that the inclination of the backrest ( 24 ) is adjustable. Raising wheelchair according to claim 6, characterized in that the inclination over at least one actuator ( 12 ) is adjustable. Raising wheelchair according to claim 7, characterized in that the at least one actuator ( 12 ) with one of its ends on the same lever ( 8th ) in the articulated parallelogram ( 45 ), as the lower end of the backrest ( 24 ). Erecting wheelchair according to one or more of the preceding claims, characterized in that the backrest cushion ( 14 ) rigidly with the backrest ( 24 ) connected is. Raising wheelchair according to claim 2 or 3, characterized in that the front part ( 5 . 20 ) of the chassis ( 40 ) is telescopic. Raising wheelchair according to one or more of the preceding claims, characterized in that for seat depth adjustment, a seat below the seat ( 10 ) provided seat plate ( 31 ) and the levers ( 1 . 3 ) are telescopic. Raising wheelchair according to claim 11, characterized in that when adjusting the seat depth a on the seat ( 10 ) fixed guide plate ( 7 ) is offset by the same amount.