EP3782595B1 - Rollstuhl - Google Patents

Rollstuhl Download PDF

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Publication number
EP3782595B1
EP3782595B1 EP19204968.2A EP19204968A EP3782595B1 EP 3782595 B1 EP3782595 B1 EP 3782595B1 EP 19204968 A EP19204968 A EP 19204968A EP 3782595 B1 EP3782595 B1 EP 3782595B1
Authority
EP
European Patent Office
Prior art keywords
wheelchair
main frame
reference plane
frame
caster
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.)
Active
Application number
EP19204968.2A
Other languages
English (en)
French (fr)
Other versions
EP3782595A1 (de
Inventor
Han-Wei Tang
Keng-Yu Ko
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.)
Li Yuan Transmission Co Ltd
Original Assignee
Li Yuan Transmission Co Ltd
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 Li Yuan Transmission Co Ltd filed Critical Li Yuan Transmission Co Ltd
Publication of EP3782595A1 publication Critical patent/EP3782595A1/de
Application granted granted Critical
Publication of EP3782595B1 publication Critical patent/EP3782595B1/de
Active 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
    • A61G5/04—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs motor-driven
    • A61G5/047—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs motor-driven by a modular detachable drive system
    • 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
    • A61G5/04—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs motor-driven

Definitions

  • the present invention generally relates to an assistive device and, more particularly, to a wheelchair without undesired back tilt.
  • a wheelchair is propelled either by an attendant pushing the wheelchair from the rear, or by the user pushing the push rims (which are outward of the main wheels) by hand.
  • FIG. 1 shows a conventional wheelchair 9 that is designed to reduce the effort of the user pushing the wheels.
  • the wheelchair 9 includes two main wheels 91 and an assistive driving system 92.
  • the two main wheels 91 are coaxial with each other such that a central axis L passes through the centers of the main wheels 91.
  • An axle is connected between the centers of the main wheels 91.
  • the assistive driving system 92 includes a caster arm 921 connected to the axle, as well as a caster 922 connected to the caster arm 921.
  • the caster 922 is on the ground.
  • the rotation of the two main wheels 91 causes the caster 922 to roll, such that the caster 922 assists in the movement of the wheelchair 9.
  • An example of such a wheelchair 9 is disclosed in U.S. Patent No. 10,265,228 .
  • a wheelchair including a main frame, two main wheels, a caster and an assistive driving system.
  • the two main wheels are coaxially mounted to two sides of the main frame, respectively.
  • a first reference plane passes through a center of each of the two main wheels.
  • the first reference plane is parallel to the ground.
  • the assistive driving system includes a slanted bar connected to the caster and the main frame.
  • the slanted bar has a force-exerting point with respect to the main frame.
  • the force-exerting point is located above the first reference plane.
  • the caster is relatively adjacent to a rear end of the main frame than the force-exerting point is.
  • the assistive driving system can be used to support the main frame of the wheelchair.
  • the assistive driving system produces a torque that keeps the main frame from tilting backwards about the centers of the two main wheels.
  • the main frame includes a left side frame, a right side frame, and a folding mechanism connected between the left and right side frames.
  • the slanted bar of the assistive driving system is connected to the folding mechanism.
  • the folding mechanism includes a cross frame in a form of two cross bars.
  • a first one of the two cross bars has a first end fixed to the left side frame and a second end fixed to the right side frame.
  • a second one of the two cross bars has a first end fixed to the right side frame and a second end fixed to the left side frame.
  • the slanted bar is connected to a crossing point of the two cross bars.
  • a second reference plane passes through the centers of the two main wheels.
  • the second reference plane is orthogonal to the first reference plane.
  • the force-exerting point is located at a side of the second reference plane relatively adjacent to a front end of the main frame opposite to the rear end of the main frame.
  • FIG. 2 shows a wheelchair without undesired back tilt according to an embodiment of the invention.
  • the wheelchair includes a main frame 1, two main wheels 2 and an assistive driving system 3.
  • the two main wheels 2 and the assistive driving system 3 are connected to the main frame 1.
  • the main frame 1 can have any shape as long as it can stably support other components of the wheelchair for assembly purpose.
  • the main frame 1 includes a left side frame 11, a right side frame 12 and a folding mechanism 13.
  • the folding mechanism 13 is located between the left side frame 11 and the right side frame 12.
  • the folding mechanism 13 can be directly connected to or indirectly coupled with the left side frame 11 and the right side frame 12.
  • the folding mechanism 13 can have an unfolding state or a folding state. In the unfolding state, the left side frame 11 and the right side frame 12 are spaced from each other to form a sufficient space for the user. In the folding state, the left side frame 11 and the right side frame 12 are spaced from each other at a small distance to reduce the space required for storage of the wheelchair.
  • the folding mechanism 13 includes a cross frame in the form of two cross bars 131.
  • a first one of the two cross bars 131 has a first end fixed to the left side frame 11 and a second end fixed to the right side frame 12.
  • a second one of the two cross bars 131 has a first end fixed to the right side frame 12 and a second end fixed to the left side frame 11.
  • the two cross bars 131 are pivotally connected to each other at the crossing point.
  • the two main wheels 2 are located at two sides of the main frame 1 and are coaxially connected to the main frame 1.
  • the two main wheels 2 are located at two sides of the main frame 1 respectively outward of the left side frame 11 and the right side frame 12.
  • the main wheels 2 are rotatably fixed to the left side frame 11 and the right side frame 12, respectively, with a central axis L passing through the centers of the two main wheels 2.
  • a first reference plane S1 passes through the centers of the two main wheels 2
  • a second reference plane S2 passes through the centers of the two main wheels 2.
  • the first reference plane S1 and the second reference plane S2 are orthogonal to each other.
  • the assistive driving system 3 includes a slanted bar 31 and a caster 32.
  • the slanted bar 31 can be directly connected to or indirectly coupled with the caster 32 and the main frame 1.
  • the slanted bar 31 has a force-exerting point P with respect to the main frame 1.
  • the force-exerting point P is located above the first reference plane S1.
  • the force-exerting point P is located on the left side of the second reference plane S2 while located on the first reference plane S1.
  • the caster 32 remains in contact with the ground and is more adjacent to the rear end of the main frame 1 than the force-exerting point P is.
  • the crossing point (the pivotal point) of the two cross bars 131 of the folding mechanism 13 is located on the first reference plane S1 and is at the left side of the second reference plane S2, the slanted bar 31 can be connected to the crossing point of the two cross bars 131.
  • This not only attains convenient assembly but also avoids the use of an additional component (a connecting rod) as the invention can be carried out on the conventional wheelchair structure.
  • additional costs will not incur and the weight of the wheelchair will not increase.
  • the interior of the caster 32 can be installed with a driving means (not shown) such as a hub motor. In this case, when the two main wheels 2 rotate, the driving means can provide power to rotate the caster 32, thereby facilitating the movement of the wheelchair.
  • the wheelchair according to the invention when the wheelchair according to the invention is propelled uphill, the resultant center of gravity of the wheelchair and the user is at the back of the wheelchair.
  • the caster 32 of the assistive driving system 3 rotates to propel the wheelchair, the caster 32 produces a force that is transmitted to the force-exerting point P through the slanted bar 31 to support the main frame 1.
  • the force is a torque that keeps the main frame 1 from tilting backwards about the central axis L.
  • the wheelchair according to the invention when the wheelchair according to the invention is propelled uphill, the wheelchair would not tilt backwards or even turnover. It is even safer to use the wheelchair when the road surface is flat.
  • the slanted bar 31 can always produce a torque that keeps the main frame 1 from tilting backwards as long as the force-exerting point P of the slanted bar 31 with respect to the main frame 1 is located above the first reference plane S1.
  • the force-exerting point P of the slanted bar 31 is at the right side of the second reference plane S2
  • the caster 32 would be excessively protrusive at the back side of the main frame 1.
  • the attendant who pushes the wheelchair might accidentally kick the caster 32, causing inconvenience in use.
  • the force-exerting point P of the slanted bar 31 is located at the left side of the second reference plane S2, it not only prevents the back tilt of the wheelchair but also avoids accidentally kicking the caster 32.
  • the slanted bar 31 of the assistive driving system 3 can be connected to other part of the main frame 1 as long as the force-exerting point P of the slanted bar 31 is located at the first reference plane S1.
  • the assistive driving system can be used to support the main frame of the wheelchair.
  • the assistive driving system produces a torque that keeps the main frame from tilting backwards about the centers of the two main wheels.

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)
  • Invalid Beds And Related Equipment (AREA)
  • Rehabilitation Tools (AREA)

Claims (3)

  1. Rollstuhl, umfassend:
    einen Hauptrahmen (1) mit einem hinteren Ende und einem dem hinteren Ende gegenüberliegenden vorderen Ende,
    zwei Haupträder (2), die jeweils koaxial an zwei Seiten des Hauptrahmens (1) angebracht sind, wobei eine erste Bezugsebene (S1) durch eine Mitte jedes der beiden Haupträder (2) verläuft, und wobei die erste Bezugsebene (S1) parallel zum Boden ist, und wobei eine zweite Bezugsebene (S2) durch die Mitten der beiden Haupträder (2) verläuft, wobei die zweite Bezugsebene (S2) orthogonal zu der ersten Bezugsebene (S1) ist,
    eine Lenkrolle (32), und
    ein Hilfsantriebssystem (3), das eine Schrägstange (31) beinhaltet, die die Lenkrolle (32) und den Hauptrahmen (1) verbindet,
    dadurch gekennzeichnet, dass
    die Schrägstange (31) des Hilfsantriebssystems (3) einen Kraftausübungspunkt (P) in Bezug auf den Hauptrahmen (1) aufweist, wobei der Kraftausübungspunkt (P) oberhalb der ersten Bezugsebene (S1) angeordnet ist, die durch die beiden Haupträder (2) definiert ist, und wobei der Kraftausübungspunkt (P) an einer Seite der zweiten Bezugsebene (S2) angeordnet ist, die dem vorderen Ende des Hauptrahmens (1) benachbart ist, so dass der Kraftausübungspunkt (P) konfiguriert ist, um eine von der Lenkrolle (32) erzeugte Kraft, wenn sich die Lenkrolle (32) dreht, über die Schrägstange (31) aufzunehmen, um den Hauptrahmen (1) zu stützen, wobei die Lenkrolle (32) näher am hinteren Ende des Hauptrahmens (1) angeordnet ist als der Kraftausübungspunkt (P).
  2. Rollstuhl nach Anspruch 1, dadurch gekennzeichnet, dass der Hauptrahmen (1) einen linken Seitenrahmen (11), einen rechten Seitenrahmen (12) und einen Faltmechanismus (13) umfasst, der zwischen dem linken und dem rechten Seitenrahmen (11, 12) verbunden ist, wobei die Schrägstange (31) des Hilfsantriebssystems (3) mit dem Faltmechanismus (13) verbunden ist.
  3. Rollstuhl nach Anspruch 1, dadurch gekennzeichnet, dass der Faltmechanismus (13) einen Querrahmen in Form von zwei Querstangen (131) aufweist, wobei eine erste der beiden Querstangen (131) ein erstes Ende, das am linken Seitenrahmen (11) befestigt ist, und ein zweites Ende, das am rechten Seitenrahmen (12) befestigt ist, aufweist, wobei eine zweite der beiden Querstangen (131) ein erstes Ende, das an dem rechten Seitenrahmen (12) befestigt ist, und ein zweites Ende aufweist, das an dem linken Seitenrahmen (11) befestigt ist, und wobei die Schrägstange (31) mit einem Kreuzungspunkt der beiden Querstangen (131) verbunden ist.
EP19204968.2A 2019-08-20 2019-10-23 Rollstuhl Active EP3782595B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
TW108129684A TWI765171B (zh) 2019-08-20 2019-08-20 不易後傾的輪椅

Publications (2)

Publication Number Publication Date
EP3782595A1 EP3782595A1 (de) 2021-02-24
EP3782595B1 true EP3782595B1 (de) 2023-02-15

Family

ID=68342724

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19204968.2A Active EP3782595B1 (de) 2019-08-20 2019-10-23 Rollstuhl

Country Status (2)

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EP (1) EP3782595B1 (de)
TW (1) TWI765171B (de)

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IL91588A (en) * 1989-09-10 1994-10-07 Propel Partnership 1987 Electric drive attachment for wheelchairs
CN102920554A (zh) * 2012-11-28 2013-02-13 上海理工大学 具有护理床功能的电动轮椅
US9144525B2 (en) 2013-03-14 2015-09-29 Max Mobility, Llc. Motion assistance system for wheelchairs
CN106859872A (zh) * 2017-02-10 2017-06-20 东莞产权交易中心 一种适合家用的轮椅
WO2018201228A1 (en) * 2017-05-02 2018-11-08 Dimitrov Dimitre Petkov Frame for utilization with components of wheelchair
TWI639420B (zh) * 2017-07-24 2018-11-01 立淵機械股份有限公司 輔助動力裝置及輪椅
DE202018006256U1 (de) * 2018-09-13 2019-10-14 Alber Gmbh Hilfsantriebsvorrichtung für einen Rollstuhl

Also Published As

Publication number Publication date
EP3782595A1 (de) 2021-02-24
TWI765171B (zh) 2022-05-21
TW202108105A (zh) 2021-03-01

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