EP0332813B1 - Rollstuhl mit von den Händen zu betätigenden Antriebshebeln - Google Patents

Rollstuhl mit von den Händen zu betätigenden Antriebshebeln Download PDF

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Publication number
EP0332813B1
EP0332813B1 EP19890100935 EP89100935A EP0332813B1 EP 0332813 B1 EP0332813 B1 EP 0332813B1 EP 19890100935 EP19890100935 EP 19890100935 EP 89100935 A EP89100935 A EP 89100935A EP 0332813 B1 EP0332813 B1 EP 0332813B1
Authority
EP
European Patent Office
Prior art keywords
bearing
wheelchair
crank
rod
pivoting
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.)
Expired - Lifetime
Application number
EP19890100935
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0332813A2 (de
EP0332813A3 (en
Inventor
Rolf-Dieter Dr. Weege
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.)
Meyra Wilhelm Meyer GmbH and Co KG
Original Assignee
Meyra Wilhelm Meyer GmbH and Co KG
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 Meyra Wilhelm Meyer GmbH and Co KG filed Critical Meyra Wilhelm Meyer GmbH and Co KG
Publication of EP0332813A2 publication Critical patent/EP0332813A2/de
Publication of EP0332813A3 publication Critical patent/EP0332813A3/de
Application granted granted Critical
Publication of EP0332813B1 publication Critical patent/EP0332813B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • A61G5/02—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs propelled by the patient or disabled person
    • A61G5/021—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs propelled by the patient or disabled person having particular propulsion mechanisms
    • A61G5/023—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs propelled by the patient or disabled person having particular propulsion mechanisms acting directly on hubs or axis
    • 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
    • A61G5/02—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs propelled by the patient or disabled person
    • A61G5/024—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs propelled by the patient or disabled person having particular operating means
    • A61G5/025—Levers

Definitions

  • the invention relates to a wheelchair of the type mentioned in the preamble of claim 1 with hand-operated drive levers.
  • wheelchairs of the type in question with drive levers for driving the driven wheels known, in which the drive levers are pivotally hinged to the frame of the wheelchair with the second pivot bearing, while the first pivot bearing is articulated via a rod to the end of a crank attached to the wheel to be driven.
  • the drive levers are pivotally hinged to the frame of the wheelchair with the second pivot bearing, while the first pivot bearing is articulated via a rod to the end of a crank attached to the wheel to be driven.
  • it is a four-link linkage, but it has the disadvantage of dead center whenever the crank points in the direction of the rod between the drive lever and the crank.
  • crank mechanisms for overcoming dead center positions DE-PS 13561, 93234, 653912, 504702, 649255, but these are so complicated that they are not suitable for use in wheelchairs. They all assume a given, unchangeable direction of force application.
  • the invention has for its object to provide a wheelchair with hand-operated drive levers in which dead center positions can be overcome by the user and which is simple and safe in construction.
  • the object on which the invention is based is achieved in that the second spherical bearing is movably connected to the frame of the wheelchair by means of a guide device, in such a way that the handles pass through paths of different heights during forward and backward movement. Since the tracks close at the front and back, tracks in principle result in similarly flat, in particular asymmetrical ellipses. With such webs, the user of a wheelchair is able to overcome dead spots in the front and rear area of the webs by changing the direction in which force is applied, similarly as is generally possible with crank drives.
  • the basic idea of the invention is therefore to combine the inherent advantage of overcoming dead center in crank drives with the lever drive which is inherently favorable in wheelchairs.
  • The is used to generate the path curve according to the invention Guide device for the drive lever, which can be designed in different ways.
  • an articulated gear is formed with a higher coupling curve as the drive movement.
  • This embodiment can be developed by the teaching of claim 3, according to which a six-link coupling gear with a higher coupling curve is formed.
  • the coupling curve of the four-bar linkage is created by guiding the crank forming a coupling member by circular movement about the axis of rotation of the crank and swinging movement of the swivel arm with the third joint bearing around its swivel bearing.
  • the guide device can also be a sliding guide for the second pivot bearing, the displaceable part of which is articulatedly connected to the crank bearing via a third rod.
  • crank bearing on the crank for the second rod can be different from that for the first rod so as to achieve different coupling curves on the handle.
  • the length of the drive lever and the length of at least one of the rods can be adjustable.
  • Fig. 1 shows from the side a wheelchair with a frame 1, which has a seat 2, armrests 3 and handles 4 for an assistant. Wheels 6 are held on the frame 1 about a vertical axis 5 and can be controlled by means not shown, and also drive wheels 7 are rotatably mounted directly via axes 8.
  • crank 9 is fixedly connected, at the end of which there is a crank bearing 10, which has a rod 12 with a rod 12 that is adjustable in length by means of an adjusting screw 11 connected first pivot bearing 13, which is located on a drive lever 14 which is adjustable in length by means of an adjusting screw 15 with a handle 16.
  • pivot bearing 13 On the side of the pivot bearing 13 facing away from the handle 16 there is a second pivot bearing 17 with which the drive lever 14 is articulated to the free end of a pivot lever 18 which is pivotably held on the frame 1 by means of a pivot bearing 19.
  • Fig. 3 shows schematically the individual links of the linkage in the wheelchair in Fig. 1, and corresponding parts are provided with the same reference numerals.
  • Drive lever 14 and pivot lever 18 are each shown as flat triangles, these triangles being hatched in a middle position in which the reference numbers are entered.
  • the handle 16 runs through a path similar to a flat, asymmetrical ellipse in the direction of arrows 24 and 25, while the crank 9 rotates with the wheel 7 and the crank bearings 10 and 23 in the direction of an arrow 25 about the axis 8.
  • the pivot lever 18 swings around the pivot bearing 19 together with the second joint bearing 17 in the direction of a double arrow 27.
  • the handle 16 in the positions in which it is furthest forward (in the drawing on the left) and furthest back (in the drawing on the right), in which dead points occurred in conventional lever drives, upwards or moved downward, that is, undergoes a movement without reversal of movement, so that a wheelchair user is able to achieve a drive or braking effect by changing the direction of his application of force.
  • the wheelchair user can push the handle 16 down and in this way drive the drive wheel 7.
  • the wheelchair user only needs to push the handle 16 upwards in order to effect a drive.
  • FIG. 4 shows schematically in a representation similar to FIG. 3 a modification of the embodiment according to FIG. 3. Corresponding parts are provided with the same reference numbers. The difference is that instead of the pivot lever 18, a slide guide 28 is provided for guiding a slide 29 in the direction of a double arrow 30. On the slide 29 there is the second joint bearing 17 of the drive lever 14. The slide 29 is connected in an articulated manner via a rod 31 to the crank bearing 23 on the crank 9, the rod 31 being extended beyond the crank bearing 23 and at the end thereof Crank bearing 10 for the rod 12 carries.

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)
  • Handcart (AREA)
  • Transmission Devices (AREA)
EP19890100935 1988-03-18 1989-01-20 Rollstuhl mit von den Händen zu betätigenden Antriebshebeln Expired - Lifetime EP0332813B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3809044 1988-03-18
DE19883809044 DE3809044A1 (de) 1988-03-18 1988-03-18 Rollstuhl mit von den haenden zu betaetigenden antriebshebeln

Publications (3)

Publication Number Publication Date
EP0332813A2 EP0332813A2 (de) 1989-09-20
EP0332813A3 EP0332813A3 (en) 1990-01-24
EP0332813B1 true EP0332813B1 (de) 1991-10-30

Family

ID=6350038

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19890100935 Expired - Lifetime EP0332813B1 (de) 1988-03-18 1989-01-20 Rollstuhl mit von den Händen zu betätigenden Antriebshebeln

Country Status (2)

Country Link
EP (1) EP0332813B1 (enrdf_load_stackoverflow)
DE (1) DE3809044A1 (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105997379A (zh) * 2016-06-27 2016-10-12 张七龙 轮椅的曲柄式人工驱动装置的制造和使用方法

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU1738282A1 (ru) * 1987-08-20 1992-06-07 С.Н.Лукь нов Инвалидна кол ска Лукь нова С.Н.
CN113730115A (zh) * 2021-09-26 2021-12-03 桂林航天工业学院 一种自适应智能轮椅装置及使用方法

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE653912C (de) * 1937-12-06 Arnold Haabeth Vorrichtung zur UEberwindung der Totlage von Kurbeltrieben
DE8328593U1 (de) * 1984-02-02 Deutsche Orthopädische Werke GmbH, 1000 Berlin Rollstuhl mit mechanisch gesteuertem Hebelkraftverstärker
DE13561C (de) * A. SCHLIEPHACKE in Leipzig Kurbelgetriebe ohne todte Punkte
DE93234C (enrdf_load_stackoverflow) *
DE504702C (de) * 1928-02-17 1930-08-08 Albert Popp Kurbeltrieb mit UEberwindung des toten Punktes
DE649255C (de) * 1935-01-27 1937-08-19 Ernst Wennecke Einrichtung zur UEberwindung der Totpunktlage von Kurbeltrieben
US2578828A (en) * 1946-09-20 1951-12-18 Walter R Nelson Ambulatory invalid chair
US2643898A (en) * 1948-06-25 1953-06-30 Herbert A Everest Self-propelled wheel chair
DE1160747B (de) * 1959-04-04 1964-01-02 Gert Schladebach Krankenfahrstuhl
US3666292A (en) * 1969-06-11 1972-05-30 Patents And Technology Exclusi Wheel chair
GB1413844A (en) * 1972-02-08 1975-11-12 Wilde J Man-powered vehicle
JPS6058868B2 (ja) * 1981-11-26 1985-12-21 明 頃末 レバ−操作式車椅子

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105997379A (zh) * 2016-06-27 2016-10-12 张七龙 轮椅的曲柄式人工驱动装置的制造和使用方法

Also Published As

Publication number Publication date
DE3809044A1 (de) 1989-09-28
EP0332813A2 (de) 1989-09-20
EP0332813A3 (en) 1990-01-24
DE3809044C2 (enrdf_load_stackoverflow) 1990-01-18

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