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EP0521811A1 - Rollstuhl - Google Patents

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Publication number
EP0521811A1
EP0521811A1 EP92610047A EP92610047A EP0521811A1 EP 0521811 A1 EP0521811 A1 EP 0521811A1 EP 92610047 A EP92610047 A EP 92610047A EP 92610047 A EP92610047 A EP 92610047A EP 0521811 A1 EP0521811 A1 EP 0521811A1
Authority
EP
European Patent Office
Prior art keywords
frame
seat unit
wheelchair
seat
articulated
Prior art date
Legal status (The legal status 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 status listed.)
Withdrawn
Application number
EP92610047A
Other languages
German (de)
English (en)
French (fr)
Inventor
Mats Feldt
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nc Nielsen Holding AS
Original Assignee
Nc Nielsen Holding AS
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 Nc Nielsen Holding AS filed Critical Nc Nielsen Holding AS
Priority to DE9219024U priority Critical patent/DE9219024U1/de
Publication of EP0521811A1 publication Critical patent/EP0521811A1/de
Withdrawn legal-status Critical Current

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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
    • 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
    • A61G5/1089—Anti-tip devices
    • 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
    • A61G5/107—Arrangements for adjusting the seat positioning the whole seat forward or rearward
    • 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
    • A61G5/1075—Arrangements for adjusting the seat tilting the whole seat backwards

Definitions

  • the invention relates to a wheelchair, consisting of a frame, a seat unit carried by the frame and a mechanism for adjusting the seat unit in different angular positions in relation to the frame, the wheelchair being such that the swinging up of the seat unit also a forward movement of the same and the swinging down of the Seat unit also causes a backward movement of the same.
  • Wheelchairs of this type offer the user greater seating comfort and also reduce the risk of sore wounds that result from the fact that the same seating surfaces are always subjected to constant, constant pressure loading on the person bound to the wheelchair, since the seating position is not changed.
  • the swinging up of the seat unit causes the center of gravity of the seated person to be shifted backwards at the same time. So that this shift in the center of gravity does not cause the wheelchair to tip over, the driving wheel must be mounted far back on the frame.
  • the object of the invention is to solve the above-mentioned problem and to provide a wheelchair with a seat unit adjustable in different angles, where the different angle settings of the seat unit do not result in a shift in the center of gravity of the seated person.
  • a wheelchair of the type described in the introduction which is characterized in that the adjustment mechanism also brings about a forward movement of the seat unit when it swings up and also causes a backward movement of the seat unit when it swings down. This counteracts the shifting back of the center of gravity of the person bound to the wheelchair, which is caused by the swinging up of the seat unit, by a corresponding forward movement of the seat unit.
  • the driving properties of a wheelchair according to the invention are not dependent on the angular position of the seat unit.
  • the frame of the wheelchair consists of two side frames and the seat unit is connected to the respective side frame by a front and a rear articulated arm, the ends of which are articulated to the side frame and the seat unit.
  • the seat unit is also connected to the frame by an arm which is adjustable in length and which is articulated at its ends to the seat unit or the frame is.
  • the length-adjustable arm includes a winch provided with four joints articulated in a parallelogram arrangement, with two of the opposite corners being arranged in the longitudinal direction of the length-adjustable arms, and the other two opposite corners are bound by means of a transverse screw / nut arrangement, so that the rotation of a screw belonging to this arrangement causes said corners to approach or move away from one another.
  • the entire length-adjustable arm can be attached under the seat unit, so that the only part of the maneuvering mechanism that projects beyond the side frames is the twist grips with which the screw is turned.
  • These handles can be attached so that they are not in the way when the wheelchair is being driven.
  • the presence of a screw / nut arrangement means that this can be provided with a transmission which also enables weak muscle-bound persons bound to the wheelchair to operate the angle adjustment of the seat unit themselves.
  • the angle between the seat unit and the frame can be optionally changed between a position where the length-adjustable arm is as short as possible and a position where the arm is as long as possible.
  • FIG. 1 is a schematic illustration of a wheelchair according to the invention without the many details with which a wheelchair is normally provided. For example, footrests or brakes are not shown, and the driving wheel is only indicated with dash-dotted lines.
  • the wheelchair shown consists of a frame which is made up of two identical side frames 1, of which only the one right is shown in Figure 1.
  • the side frames are connected to one another in a known manner by means of crossbars, only one of which is shown in the figures and has the reference number 2.
  • the seat unit 3 of the wheelchair which consists of a back support 4 and a seat 5, is carried by the frame through a joint system.
  • This articulation system consists of two rear articulated arms 6, two front articulated arms 7 and a length-adjustable arm 8.
  • the ends of the rear and front articulated arms are swingably attached to the respective side frame and the underframe of the seat 5, whereas the length adjustable arm extends in the direction of the longitudinal symmetry line of the seat 5 and is attached with its ends to the crossbar 2 of the frame or to the front part of the base of the seat 5 so that it can swing.
  • the length-adjustable arm 8 is shown in FIG. 2 and contains a winch 9, which is constructed from four identical scissor joints 10-13, which are arranged in a parallelogram in such a way that there are two opposite corners in the longitudinal direction of the arm 8.
  • the two obliquely opposite corners of the parallelogram, which are formed by the joints 10-13, are connected to each other by a screw 16, which through the threaded hole in the nut pieces 14, 15, which are attached to these corners of the parallelogram, runs.
  • the outer ends of the joints 10-13 are articulated to the respective nut pieces, and the inner ends are articulated to the rear part 21 of the arm 8 and the front part 22 of the arm 8, respectively.
  • the screw 16 includes threaded portions 17, 18 with opposite threads which engage the threads of the nuts 14, 15.
  • the rear part 21 of the arm 8 is appropriately swingably connected to the crossbar 2, and the front part 22 is swingably connected to the base of the seat 5.
  • the position of the seat unit and the joint system in the shortest state of the arm 8 are marked with solid lines in FIG. 1.
  • the articulated arms 6 and 7 are swung about their pivot points on the frame, causing the pivot points of the rear articulated arms on the seat to move forward and downward the pivot points of the front articulated arms on the seat move forward and upward.
  • the seat unit 3 simultaneously moves forward and swings so that the rear part lowers and the front part rises.
  • the position of the seat unit and of the joint system is also marked with dashed lines when the length of the arm 8 is increased.
  • the angle relative to horizontal and the distance between the two in the starting position of the arm 8, i.e. in its shortest state chosen so that the forward movement of the seat unit corresponds to the return of the center of gravity due to the simultaneous oscillation of the seat unit from the initial position, there is no redistribution of the forces between the driving and front wheels. Therefore the angle adjustment of the seat unit has no influence on the driving characteristics of the wheelchair.
  • the winch may be of a different type than the one shown and may be shaped as a fixed lifting mechanism, the upper end of which is slidably connected to the base of the seat.
  • the articulated arms may be swingably mounted on the crossbar instead of the side frame, and the swinging joints may be shaped in any suitable manner known per se. Therefore, the invention is limited only by the content of the following claims.

Landscapes

  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Developing Agents For Electrophotography (AREA)
  • Prostheses (AREA)
  • Seats For Vehicles (AREA)
  • Handcart (AREA)
EP92610047A 1991-06-27 1992-06-22 Rollstuhl Withdrawn EP0521811A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE9219024U DE9219024U1 (de) 1991-06-27 1992-06-22 Rollstuhl

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE9101986 1991-06-27
SE9101986A SE9101986D0 (sv) 1991-06-27 1991-06-27 Rullstol

Publications (1)

Publication Number Publication Date
EP0521811A1 true EP0521811A1 (de) 1993-01-07

Family

ID=20383169

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92610047A Withdrawn EP0521811A1 (de) 1991-06-27 1992-06-22 Rollstuhl

Country Status (3)

Country Link
EP (1) EP0521811A1 (no)
NO (1) NO301865B1 (no)
SE (1) SE9101986D0 (no)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20140117644A1 (en) * 2012-05-14 2014-05-01 Dave Paul Wheelchair Having Two Metastable Positions

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1941577A1 (de) * 1969-08-16 1971-03-04 Fritz Maleski Vorrichtung zum Ermoeglichen oder Erleichtern des Sitzens fuer koerperlich und geistig behinderte Personen
DE8600778U1 (de) * 1986-01-15 1986-05-28 Müllenheim, Michael, 3300 Braunschweig Sitzschalenfahrgestell
EP0248474A1 (en) * 1986-06-05 1987-12-09 Huka Developments B.V. Wheelchair with tilting seat part
DE3902694A1 (de) * 1989-01-30 1990-08-02 Ortopedia Gmbh Rollstuhl mit verstellbarem sitz

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1941577A1 (de) * 1969-08-16 1971-03-04 Fritz Maleski Vorrichtung zum Ermoeglichen oder Erleichtern des Sitzens fuer koerperlich und geistig behinderte Personen
DE8600778U1 (de) * 1986-01-15 1986-05-28 Müllenheim, Michael, 3300 Braunschweig Sitzschalenfahrgestell
EP0248474A1 (en) * 1986-06-05 1987-12-09 Huka Developments B.V. Wheelchair with tilting seat part
DE3902694A1 (de) * 1989-01-30 1990-08-02 Ortopedia Gmbh Rollstuhl mit verstellbarem sitz

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20140117644A1 (en) * 2012-05-14 2014-05-01 Dave Paul Wheelchair Having Two Metastable Positions

Also Published As

Publication number Publication date
NO922488L (no) 1992-12-28
SE9101986D0 (sv) 1991-06-27
NO301865B1 (no) 1997-12-22
NO922488D0 (no) 1992-06-24

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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