WO2012047167A1 - A device for a wheel chair and a wheel chair - Google Patents

A device for a wheel chair and a wheel chair Download PDF

Info

Publication number
WO2012047167A1
WO2012047167A1 PCT/SE2011/051188 SE2011051188W WO2012047167A1 WO 2012047167 A1 WO2012047167 A1 WO 2012047167A1 SE 2011051188 W SE2011051188 W SE 2011051188W WO 2012047167 A1 WO2012047167 A1 WO 2012047167A1
Authority
WO
WIPO (PCT)
Prior art keywords
end portion
seat
lifting arm
pivot point
base frame
Prior art date
Application number
PCT/SE2011/051188
Other languages
French (fr)
Inventor
Hans Balle Christensen
Original Assignee
Reac Ab
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Reac Ab filed Critical Reac Ab
Publication of WO2012047167A1 publication Critical patent/WO2012047167A1/en

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61G—TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
    • A61G5/00—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs
    • A61G5/10—Parts, details or accessories
    • A61G5/1056—Arrangements for adjusting the seat
    • A61G5/1067—Arrangements for adjusting the seat adjusting the backrest relative to the seat portion
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61G—TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
    • A61G5/00—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs
    • A61G5/10—Parts, details or accessories
    • A61G5/1056—Arrangements for adjusting the seat
    • A61G5/1059—Arrangements for adjusting the seat adjusting the height of the seat
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61G—TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
    • A61G5/00—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs
    • A61G5/10—Parts, details or accessories
    • A61G5/14—Standing-up or sitting-down aids
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61G—TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
    • A61G2203/00—General characteristics of devices
    • A61G2203/70—General characteristics of devices with special adaptations, e.g. for safety or comfort
    • A61G2203/74—General characteristics of devices with special adaptations, e.g. for safety or comfort for anti-shear when adjusting furniture
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61G—TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
    • A61G5/00—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs
    • A61G5/006—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs convertible to stretchers or beds

Definitions

  • the first end portion 23 of the actuator 22 is pivotally fitted to the rearward, second end portion 5 of the base frame 1 via a seventh pivot point G, and the second end portion 24 of the actuator 22 is pivotally fitted to the first leg 12 of the pivotal lifting arm 11, at the first end portion 13, via an eight pivot point H.
  • first lifting arm 16 which is disposed between the pivot points E and B, is of the same length as the second lifting arm 19, which is disposed between the pivot points D and F.
  • the first lifting arm 16 and the second lifting arm 19 are disposed at a predetermined distance from each other and are parallel with each other. This enables the seat 2 to be parallel with the second leg 14 of the pivotal lifting arm 11 during the entire pivoting movement of the seat 2.
  • Figure 1 shows the device in a sitting position, where the seat 2 of the device is in a horizontal position, which means that also the second leg 14 of the pivotal lifting arm 11 is in a horizontal position.
  • the actuator 22 is in a retracted position.

Abstract

The invention relates to a device for a wheel chair comprising a base frame (1), a seat (2), wherein the seat is pivotally disposed around a second pivot point (B), so that the seat can assume several positions from a substantially horizontal position to a substantially vertical position, and a linkage (3), articulately connecting the seat to the base frame, wherein the linkage is adapted for pivoting the seat between the different positions. The device is characterized in that the linkage comprises a steering arm (8), which is adapted for connecting the second pivot point to a first pivot point (A) at the base frame such that, when the seat is pivoted in a first pivoting direction around the second pivot point, the second pivot point is moved by the steering arm along a circular arc in a second pivoting direction around the first pivot point, wherein the second pivoting direction is opposite to the first pivoting direction. The invention also relates to a wheel chair comprising such a device.

Description

A device for a wheel chair and a wheel chair
The present invention relates to a device for a wheel chair, comprising:
- a base frame;
- a seat, wherein the seat is capable of assuming several positions from a substantially horizontal position to an upright position; and
- a linkage, articulately connecting the seat to the base frame, wherein the linkage is adapted for pivoting the seat between the different positions, said linkage comprising a steering arm, comprising a first end portion and a second end portion, wherein the first end portion is pivotally fitted to the base frame and wherein the second end portion is pivotally fitted to the seat.
A wheel chair is a necessary aid for a person with reduced mobility. Sometimes the user needs assistance from the wheel chair to be able to rise from a sitting position to a standing position.
There are wheel chairs having seats, where the seat can be raised up from a horizontal sitting position to a vertical standing position. Examples of wheel chairs having seats with these functions are described in US 5,366,036, US 2007/0296177 Al , US 2003/0227161 Al and US 5,556,121. It is common for these wheel chairs that they are not particularly ergonomic for the user, since the pattern of movement of the seats does not follow the natural movement of the body, when the body is raised from a sitting position to a standing
position.
AU 624314B B3 discloses a device which, inter alia, can be arranged in a wheel chair. The device comprises a base frame, a seat, and a linkage, articulately connecting the seat to the base frame. The seat can be raised from a horizontal position to a more upright position, in that a vertically disposed actuator transmits a linear actuating movement to the rear edge of the seat, so that the seat is raised to the upright position. A disadvantage of this solution is that the device tends to become rather bulky due to the vertical configuration of the actuator. The object of the present invention is to produce a device for a wheel chair, wherein the device allows the user a movement, in connection with moving the seat between a horizontal position and a vertical position, which completely or partially solves the problems of the prior art.
The device according to the invention is characterized in that the linkage further comprises :
- a V-shaped pivotal lifting arm, comprising a first leg, a second leg and a pointed central portion, wherein the pivotal lifting arm has its central portion pivotally fitted to the base frame;
- a first lifting arm, comprising a first end portion and a second end portion, wherein the first end portion is pivotally fitted to the second leg and wherein the second end portion is pivotally fitted to the seat ;
- a second lifting arm, comprising a first end portion and a second end portion, wherein the first end portion is pivotally fitted to the second leg and wherein the second end portion is pivotally fitted to the seat; and
- an actuator, which is disposed between the base frame and the first leg for producing a pivoting movement of the pivotal lifting arm. In the following, the invention will be described more closely with reference to accompanying drawings.
Figure 1 shows a first preferred embodiment of a device according to the invention, where a seat of the device is positioned in a horizontal sitting position.
Figure 2 shows the device of Figure 1, where the seat is positioned in an upright, vertical standing position.
In the following, the word end portion will be used on several occasions. As used herein, end portion refers to a portion of a body or an object. In particular, end portion will be used for describing two bodies which are pivotally fitted to each other via a common pivot point, wherein the end portion of the first body is pivotally fitted to the end portion of the second body via the common pivot point. It will be appreciated by a skilled person that the position of the pivot point of the respective body does not necessarily have to be located close to the end, although this is preferred. The pivot point of the respective body can be positioned at a predetermined distance from the end inward toward the centre of the body, where a pivoting movement between the first and the second body is enabled such that the function of the invention is achieved. Accordingly, the end portion of the respective body is a portion extending from one end of the body and inward toward the centre of the body, where the above-mentioned pivot point can be located, which enables the function of the invention to be achieved.
The device described in the following is for a wheel chair, intended to be used by a user with reduced
mobility, wherein the movement of the device is to assist a user in moving from a sitting position to a standing position and from a standing position to a sitting one. The device comprises a base frame 1, a seat 2 and a linkage 3, articulately connecting the seat 2 to the base frame 1.
The base frame 1 comprises a forward, first end portion 4 and a rearward, second end portion 5, which is opposite to the first end portion 4. The seat 2 comprises a forward, first end portion 6 and a rearward, second end portion 7, which is opposite to the first end portion 6.
The linkage 3 comprises a steering arm 8, comprising a lower, first end portion 9 and an upper, second end portion 10.
The linkage further comprises a V-shaped pivotal lifting arm 11, comprising a first leg 12, a second leg 14, and a V-shaped, pointed central portion 26, which is located between the first leg 12 and the second leg 14, where the first leg 12 meets the second leg 14. The pivotal lifting arm 11 comprises a first end portion 13 on the first leg 12 and a second end portion 15 on the second leg 14. The second leg 14 is longer than the first leg 12.
Furthermore, the linkage 3 comprises a forward, first lifting arm 16 comprising a lower, first end portion 17 and an upper, second end portion 18, and a rearward, second lifting arm 19 comprising a lower, first end portion 20 and an upper, second end portion 21.
Finally, the linkage 3 comprises an actuator 22
comprising a rearward, first end portion 23 and a
forward, second end portion 24. The actuator 22 is adapted to perform a linear actuating movement, where the end portions 23, 24 of the actuator are caused to move toward or away from each other.
The first end portion 9 of the steering arm 8 is
pivotally fitted to the base frame 1 via a first pivot point A. The first pivot point A is located at the end portion of a vertical leg 25 of the base frame 1, said leg 25 being located at a position between the first and second end portions 4, 5 of the base frame 1. The second end portion 10 of the steering arm 8 is pivotally fitted to the forward, first end portion 6 of the seat 2 via a second pivot point B.
The pointed central portion 26 of the V-shaped pivotal lifting arm is pivotally fitted to the base frame 1 via a third pivot point C.
The first end portion 17 of the first lifting arm 16 is pivotally fitted to the second leg 14 of the pivotal lifting arm 11 via a fifth pivot point E, between the central portion 26 and the second end portion 15 of the pivotal lifting arm 11. The second end portion 18 of the first lifting arm 16 is pivotally fitted to the forward, first end portion 6 of the seat 2 via the second pivot point B.
The first end portion 20 of the second lifting arm 19 is pivotally fitted to the second leg 14 of the pivotal lifting arm 11 via a fourth pivot point D, at the second end portion 15 of the pivotal lifting arm. The second end portion 21 of the second lifting arm 19 is pivotally fitted to the seat 2 via a sixth pivot point F. The sixth pivot point F is located at the seat 2, at a
predetermined distance behind the forward end portion 6 of the seat 2 and the second pivot point B. The first end portion 23 of the actuator 22 is pivotally fitted to the rearward, second end portion 5 of the base frame 1 via a seventh pivot point G, and the second end portion 24 of the actuator 22 is pivotally fitted to the first leg 12 of the pivotal lifting arm 11, at the first end portion 13, via an eight pivot point H.
As seen in the longitudinal direction of the base frame 1, the pivot points at the base frame 1 are mutually related as follows. The third pivot point C is located at the forward, first end portion 4 of the base frame 1. The seventh pivot point G is located at the rearward, second end portion 5 of the base frame 1. The first pivot point A is located between and above the two other pivot points C and G.
The distance between the second pivot point B and the sixth pivot point F is equal to the distance between the fifth pivot point E and the fourth pivot point D.
Furthermore, the first lifting arm 16, which is disposed between the pivot points E and B, is of the same length as the second lifting arm 19, which is disposed between the pivot points D and F. The first lifting arm 16 and the second lifting arm 19 are disposed at a predetermined distance from each other and are parallel with each other. This enables the seat 2 to be parallel with the second leg 14 of the pivotal lifting arm 11 during the entire pivoting movement of the seat 2. Figure 1 shows the device in a sitting position, where the seat 2 of the device is in a horizontal position, which means that also the second leg 14 of the pivotal lifting arm 11 is in a horizontal position. Here, the actuator 22 is in a retracted position.
Figure 2 shows the device in a standing position, where the seat 2 is in an upright, substantially vertical position, which means that also the second leg 14 of the pivotal lifting arm 11 is in a vertical position. When raising the seat 2, the actuator 22 moves from a
retracted position to an extended position, which means that the actuator 22 exerts a force on the first leg 12 of the pivotal lifting arm 11. This causes the pivotal lifting arm 11 to start rotating around the third pivot point C, so that the second leg 14 of the pivotal lifting arm 11 exerts an upwardly pivoting force on the first lifting arm 16 and the second lifting arm 19. The
configuration of the lifting arms, which has been
described above, causes the seat 2 to have the same angle during the pivoting movement as the second leg 14 of the pivotal lifting arm 11. The seat 2 is pivoted from the horizontal position to the vertical position around the second pivot point B, at the forward, first end portion 6 of the seat 2. During the raising operation, the steering arm 8 will rotate around the first pivot point A, at the first end portion 9 of the steering arm. This causes the pivot point B of the seat 2 to rotate with the second end portion of the steering arm 8 along a circular arc, wherein the radius of the circular arc is constituted by the length of the steering arm 8. When the seat 2 is pivoted in first pivoting direction around the second pivot point B, the second pivot point B is moved by the steering arm 8 along a circular arc, in a second pivoting direction around the first pivot point A, wherein the second pivoting direction is opposite to the first pivoting direction.
The movement of the seat 2 during the raising operation emulates the natural movement of a person getting up, and this is the reason why this particular movement is optimal for a user.
The movement of the seat during raising is unique and differs substantially from the prior art, where the rotation of the seats takes place around a point of rotation that is usually completely stationary, and if it moves, this does not occur along a circular arc. In the foregoing, the invention has been described based on a specific embodiment. It will be appreciated, however, that other embodiments and variants are possible within the scope of the following claims .

Claims

C L A I M S
1. A device for a wheel chair, comprising:
- a base frame (1) ;
- a seat (2) , wherein the seat (2) is capable of
assuming several positions from a substantially- horizontal position to an upright position; and
- a linkage (3), articulately connecting the seat (2) to the base frame (1) , wherein the linkage (3) is adapted for pivoting the seat (2) between the
different positions, said linkage (3) comprising a steering arm (8) , comprising a first end portion (9) and a second end portion (10) , wherein the first end portion (9) is pivotally fitted to the base frame (1) and wherein the second end portion (10) is pivotally fitted to the seat (2) ,
characterized in that the linkage (3) further
comprises :
- a V-shaped pivotal lifting arm (11) , comprising a first leg (12) , a second leg (14) and a pointed central portion (26) , wherein the pivotal lifting arm (11) has its central portion (26) pivotally fitted to the base frame (1) ;
- a first lifting arm (16) , comprising a first end portion (17) and a second end portion (18) , wherein the first end portion (17) is pivotally fitted to the second leg (14) and wherein the second end portion (18) is pivotally fitted to the seat (2) ;
- a second lifting arm (19) , comprising a first end portion (20) and a second end portion (21) , wherein the first end portion (20) is pivotally fitted to the second leg (14) and wherein the second end portion (21) is pivotally fitted to the seat (2) ; and
- an actuator (22) , which is disposed between the base frame (1) and the first leg (12) for producing a pivoting movement of the pivotal lifting arm (11) .
2. The device according to claim 1, characterized in that the first lifting arm (16) and the second lifting arm (19) are disposed at a predetermined distance from each other.
3. The device according to claim 2, characterized in that the first lifting arm (16) and the second lifting arm (19) are parallel with each other.
4. A wheel chair, characterized in that the wheel chair comprises a device according to any one of the claims 1-3.
PCT/SE2011/051188 2010-10-05 2011-10-04 A device for a wheel chair and a wheel chair WO2012047167A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE1051039-4 2010-10-05
SE1051039A SE535719C2 (en) 2010-10-05 2010-10-05 Device for a swivel seat for a wheelchair and wheelchair

Publications (1)

Publication Number Publication Date
WO2012047167A1 true WO2012047167A1 (en) 2012-04-12

Family

ID=45927973

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE2011/051188 WO2012047167A1 (en) 2010-10-05 2011-10-04 A device for a wheel chair and a wheel chair

Country Status (2)

Country Link
SE (1) SE535719C2 (en)
WO (1) WO2012047167A1 (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU624314B3 (en) * 1991-03-07 1992-04-08 Robert Leslie Wakelin A controlled elevating seat or cushion system
US5366036A (en) * 1993-01-21 1994-11-22 Perry Dale E Power stand-up and reclining wheelchair
US5556121A (en) * 1992-09-15 1996-09-17 International Diffusion Consommateurs I.D.C. Motorized assistance device adaptable on an elevator wheelchair and elevator wheelchair incorporating same
WO2009036737A1 (en) * 2007-09-18 2009-03-26 Otto Bock Healthcare Ip Gmbh & Co. Kg Stand-up wheelchair

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU624314B3 (en) * 1991-03-07 1992-04-08 Robert Leslie Wakelin A controlled elevating seat or cushion system
US5556121A (en) * 1992-09-15 1996-09-17 International Diffusion Consommateurs I.D.C. Motorized assistance device adaptable on an elevator wheelchair and elevator wheelchair incorporating same
US5366036A (en) * 1993-01-21 1994-11-22 Perry Dale E Power stand-up and reclining wheelchair
WO2009036737A1 (en) * 2007-09-18 2009-03-26 Otto Bock Healthcare Ip Gmbh & Co. Kg Stand-up wheelchair

Also Published As

Publication number Publication date
SE1051039A1 (en) 2012-04-06
SE535719C2 (en) 2012-11-20

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