EP0151141B1 - Kippmechanismus für einen sitz - Google Patents

Kippmechanismus für einen sitz Download PDF

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Publication number
EP0151141B1
EP0151141B1 EP84902525A EP84902525A EP0151141B1 EP 0151141 B1 EP0151141 B1 EP 0151141B1 EP 84902525 A EP84902525 A EP 84902525A EP 84902525 A EP84902525 A EP 84902525A EP 0151141 B1 EP0151141 B1 EP 0151141B1
Authority
EP
European Patent Office
Prior art keywords
seat
lever
pivotal
chair
fixed frame
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
Application number
EP84902525A
Other languages
English (en)
French (fr)
Other versions
EP0151141A1 (de
Inventor
Paul Andrew Boardman
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to AT84902525T priority Critical patent/ATE47290T1/de
Publication of EP0151141A1 publication Critical patent/EP0151141A1/de
Application granted granted Critical
Publication of EP0151141B1 publication Critical patent/EP0151141B1/de
Expired 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
    • A61G5/10—Parts, details or accessories
    • A61G5/14—Standing-up or sitting-down aids

Definitions

  • This invention relates to an armchair having a tiltable seat to provide aid to an occupant in rising from the seat.
  • US-A-4 120 530 discloses a wheelchair which has a pivotally mounted seat to assist movement of the chair occupant in rising from a sitting position to a standing position. Pivotal movement of the seat is achieved by a movably mounted foot rest structure. Operation of the foot rest structure requires the chair occupant to shift and alter his weight distribution.
  • US-A-4 031 576 discloses an aid for invalids facilitating their ability to be seated and unseated from a water closet using a manually operated lever which enables a spring to bias a pair of arm rests for raising or lowering a seat.
  • the present invention seeks to overcome the disadvantages of prior constructions by providing a chair with a tiltable seat which is actuated by a relatively simple mechanism and which utilizes the normal force which an occupant exerts in rising from the seat.
  • the invention provides an armchair having a fixed frame and a seat tiltable relative to said fixed frame of the chair to provide aid to an occupant in rising from the chair the seat being tiltable from a lowered position to a raised position by a lever mechanism provided beneath the seat, characterized in that the lever mechanism operatively is connected to at least one pivotal arm rest assembly of the chair and to said fixed frame, said arm rest assembly being disposed above the level of said seat when the seat is in its lowered position and having a rear part pivotally connected to said fixed frame and a forward part remote from said pivotal connection and in that said lever mechanism comprises a main tilting lever having one end pivotally connected to said forward part of said arm rest assembly and an opposite end located for abutment with the chair seat and being pivotally connected intermediate its ends to said fixed frame, said main tilting lever being actuated to tilt said seat by downward pivotal movement of said forward part of said arm rest assembly by force exerted thereon by the occupant in rising from the chair.
  • the armchair 10 is of modular construction of which the main structural components comprise a pair of similar side frames 12, 14 respectively, interconnected and spaced apart by a tiltable seat pan 16; a back frame 18, and a pair of pivotal arm rest assemblies 20, 22 respectively, each of which actuates a seat tilting mechanism such as mechanism 24.
  • the side frames and the back frame together provide a fixed frame part of the armchair.
  • Side frame 14 comprises a main upright strut 26, a foot 28 integral with upright strut 26 and a forwardly projecting cantilevered support member 30 also integral with the upright strut intermediate its ends.
  • Side frame 12 is of similar construction.
  • the back frame 18 is a simple rectangular frame comprising longitudinal and transverse frame elements 32, 34 and 36, 38 respectively.
  • the longitudinal frame elements are formed with fastening locations 'I' at which the side frames are connected to the back frame by suitable fasteners at fixing locations 'f'.
  • the transverse frame element 38 is displaced forwardly of the plane containing the other frame elements and thereby provides a step 's' on which the rearmost part of the seat pan is supported when the seat is in its lowered (substantially horizontal) position.
  • the back frame is in-filled by a suitable material, which may be attached to the longitudinal frame elements as shown in order to provide the chair back 40.
  • the seat pan 16 also comprises a generally rectangular frame comprising longitudinal and transverse frame elements 42, 44 and 46, 48 respectively.
  • the forward transverse frame element 48 is displaced rearwardly and below the longitudinal frame elements so that the frame in-fill material 50 is wrapped over the leading edge of the seat to aid comfort of the user.
  • the forward end of each of the longitudinal frame elements is furnished with a journal bush 52 and 54 respectively, by which the leading edge of the seat is pivotally connected to the tilting mechanism 24.
  • the seat tilting mechanism will now be described with reference to mechanism 24 associated with side frame 14, it being understood that a similar mechanism is associated with the other side frame 12.
  • Mechanism 24 comprises a main tilting lever 56 which is pivotally mounted at 'P' intermediate its ends to a cantilevered support member 30 of side frame 14.
  • One end of lever 56 carries a stub shaft 58 which engages beneath seat pan longitudinal frame element 44.
  • the stub shaft 58 may be replaced by a rod which connects together the main tilting levers of both tilting mechanisms and which extends across the seat pan 16.
  • the opposite end of main tilting lever 56 is pivotally mounted at 60 to the lower end of a connecting strut 62 of pivotal arm assembly 22.
  • the upper end of strut 62 is hinged to the forward end of pivotal arm 64 of the assembly 22 by means of a hinged connection 66.
  • the rearward end of pivotal arm 64 is pivotally mounted to the side frame 14 of pivotal connection 68.
  • a main lifting lever 70 has one of its ends pivotally journalled to the leading edge of the seat frame by means of a pivotal connection to the journal bush 54 and has its opposite end pivotally and slidably mounted to the support member 30 adjacent upright strut 26 by means of a pivot 72 mounted within slider 74.
  • the main lifting lever 70 is interconnected with the main tilting lever 56 intermediate their ends by means of pivotal connection 76.
  • the seat tilting mechanism 24 is actuated by pivotal movement of the arm rest assembly 22 as will now be described.
  • Arm rest assembly 22 is disposed above the level of the seat pan 16 when the seat is in its lowered position as shown in Figures 1 and 3.
  • Assembly 22 has a rear part pivotally connected at 68 to the side frame 14 and a forward part which is connected to actuate the mechanism 22 when the forward part is pivoted downwardly.
  • the connecting strut 62 of the arm rest assembly 22 is of hollow construction and houses a reciprocal actuator push rod 78 which slides in a through bore 80 of the strut 62.
  • the upper end of push rod 78 abuts the undersurface of an actuating button 82 within button recess 84.
  • the lower end of the push rod is formed to provide an inclined face 86 which cooperates with detent 88 having a cunieform recess 90 in its mid-section.
  • Detent 88 is slidably accommodated within a blind bore 92 extending transversely of the strut adjacent its lower end.
  • the detent has a locking nose portion 94 which normally protrudes proud of the mouth of blind bore 92 and engages in a recessed step 96 provided at the forward end of support member 30 thereby to hold the pivotal arm assembly locked to the support member against pivotal movement.
  • the push rod 78 and the detent 88 thereby provide locking means for arresting movement of the lever mechanism when pivotal movement of the seat is not required.
  • the push rod In order to release strut 62 to permit pivotal movement of the arm assembly 22, the push rod is caused to move downwardly whereby the inclined surface 86 acts on the oppositely inclined surface 98 of the detent mid-section and forces the detent to slide inwardly of blind recess 92 against the force of compression spring 100.
  • the nose portion 94 is retracted out of engagement with the recess step 96 to unlock the pivotal arm rest assembly.
  • the actuating button extends through aperture 102 provided attheforward end of the pivotal arm 64 so that an exposed portion of the button stands proud of the pivotal arm 64 and is depressed to cause downward movement of the push rod.
  • strut 62 is formed with a stepped portion 104 which seats in an oppositely stepped portion provided in the lower forward end of support member 30 when the arm rest assembly is in its locked position.
  • the other arm rest assembly is similarly constructed.
  • both arm assemblies When both arm assemblies are in their locked positions, the pivotal arms thereof are in a substantially horizontal position and the connecting struts are in an upright position as shown in solid lines in Figure 3. Moreover, in this condition the seat pan 16 is in its lowered position i.e. substantially horizontal and the main levers of the tilting mechanism 56 and 70 are in folded condition adjacent the inner faces of the support members of their respective side frames. Hence, the chair may be used as a normal arm chair.
  • the occupant In order to benefit from the aid a user derives in rising from the chair by the tiltable seat, the occupant first depresses the actuating buttons of each arm assembly simultaneously so as to unlock those assemblies. The occupant thereafter actuates the seat tilting mechanism by pushing downwardly on the forward ends of the pivotal arms during rising and also shifts forwardly in the seat. This is a quite natural movement normally affected in rising from an armchair.
  • levers 56 and 70 are interconnected, clockwise rotation of lever 56 also causes pivot 76 to shift relative to fixed pivot 'P' and thus the pivotal movement of lever 56 is accompanied by a generally forward sliding movement of pivot 72 relative to slider 74 during anti-clockwise rotation of lever 70 about pivot 72.
  • the leading edge of the seat simultaneously is raised and moved forwardly relative to the support member 30.
  • the scissor-like assembly of levers 56 and 70 is 'opened' when the seat is in its raised and tilted condition.
  • the feet of the side frames have divergent forward facing portions to provide a stable base for the chair. Further, this arrangement allows a user having a walking aid to approach the chair more easily.
  • a one-way damping device 'D' which may be a pneumatic piston and cylinder device is interconnected between pivot 54 and 58 thereby to retard lowering movement of the seat.
  • the relative ratios of the lever sizes and their pivotal locations can be adjusted to provide different tilt angles of the seat and to vary the height to which the seat is raised.
  • the damping device 'D' is a pneumatic piston and cylinder device the angle of inclination of the raised seat is arranged to be less acute so that end 58 of the main tilting lever travels a smaller distance relative to the seat frame.

Claims (8)

1. Lehnstuhl, mit einen starren Rahmen (12, 14, 18) und einen Sitz (16), der kippbar in bezug auf den starren Rahmen des Stuhls ist, um einem Sitzenden beim sich Erheben aus dem Stuhl Hilfe zu bieten, wobei der Sitz von einer abgesenkten Stellung in eine angehobene Stellung mittels eines Gestänges (24) kippbar ist, das unter dem Sitz angeordnet ist, dadurch gekennzeichnet, daß das Gestänge mit wenigstens einer schwenkbaren Armauflageanordnung (22) des Stuhles und mit dem starren Rahmen funktionell verbunden ist, wobei sich die Armauflageanordnung oberhalb der Sitzebene befindet, wenn der Sitz in seiner abgesenkten Stellung ist und einen hinteren Teil (68) aufweist, der schwenkbar mit dem starren Rahmen und einem von der Schwenkverbindung entfernten vorderen Teil verbunden ist, und daß das Gestänge einen Hauptkipphebel (56) enthält, dessen eines Ende (60) schwenkbar mit dem vorderen Teil der Armauflageanordnung verbunden und dessen entgegengesetztes Ende (58) zur Anlage gegen den Stuhlsitz angeordnet ist, und der zwischen seinen Enden (P) schwenkbar mit dem starren Rahmen verbunden ist, wobei der Hauptkipphebel betätigt wird, um den Sitz durch eine nach unten gerichtete Schwenkbewegung des vorderen Teils der Armauflagenordnung zu kippen mittels einer darauf ausgeübten Kraft durch den Sitzenden beim sich Erheben aus dem Stuhl.
2. Lehnstuhl nach Anspruch 1, dadurch gekennzeichnet, daß das Gestänge (24) den hinteren Teil des Sitzes (16) veranlaßt, nach vorn in bezug auf einen vorderen Teil des Sitzes zu kippen und gleichzeitig aufzurichten und den Sitz (16) anzuheben und in bezug auf den starren Rahmen (12,14, 18) nach vorn zu bewegen.
3. Lehnstuhl nach Anspruch 2, dadurch gekennzeichnet, daß der starre Rahmen des Sitzes (16) ein auskragendes Trägerbauteil (30) aufweist, um welches das Gestänge (24) schwenkbar ist, und daß Arretiermittel (78, 88) vorgesehen sind, um die schwenkbare Armauflageanordnüng (22) in bezug auf das auskragende Trägerbauteil (30) zu arretieren und dadurch Bewegung des Gestänges (24) zu sperren, wenn keine Schwenkbewegung des Sitzes (16) erforderlich ist.
4. Lehnstuhl nach Anspruch 3, dadurch gekennzeichnet, daß die vorderen und hinteren Teile der schwenkbaren Armauflageanordnung (22) mit einem Schwenkarm (64) versehen sind, dessen hinterer Teil schwenkbar an einem Teil des starren Rahmens oberhalb des auskragenden Trägerbauteils (30) befestigt (68) ist, und daß eine Verbindungsstrebe (62) vorgesehen ist und ein Ende aufweist, das schwenkbar mit dem vorderen Teil des Schwenkarms (64) verbunden (66) ist, und ein entgegengesetztes Ende, das mit einem Ende des Hauptkipphebels (56) des Gestänges (24) verbunden ist, wobei in die Verbindungsstrebe (62) die Arretiermittel (68, 88) eingebaut sind, durch die die schwenkbare Armauflageanordnung (22) in bezug auf den starren Rahmen (12, 14, 18) arretiert ist.
5. Lehnstuhl nach Anspruch 4, dadurch gekennzeichnet, daß der Hauptkipphebel schwenkbar zwischen dessen Ende mit dem auskragenden Trägerbauteil (90) verbunden (P) ist, wobei das eine Ende (58) mit dem Stuhlsitz (16) derart zusammenwirkt, daß der hintere Teil des Sitzes (16) in bezug auf dessen vorderes Teil während des Drehens des Hauptkipphebels (56) in bezug auf das auskragende Trägerbauteil (30) gekippt wird.
6. Lehnstuhl nach Anspruch 5, dadurch gekennzeichnet, daß ein Hauptanhebehebel (70) schwenkbar mit dem Hauptkipphebel (56) zwischen den Enden dieser Hebel verbunden ist, um eine scherenartige Anordnung zu bilden, daß ein Ende des Hauptanhebehebels (70) schwenkbar an dem vorderen Teil des Sitzes befestigt ist, und daß das entgegengesetzte Ende des Hauptanhebehebels (70) schwenkbar und verschiebbar an dem auskragenden Trägerbauteil (30) rückwärtig der Schwenkverbindung zwischen dem Hauptkipphebel (56) und dem auskragenden Trägerbauteil (30) befestigt ist.
7. Lehnstuhl nach irgendeinem der Ansprüche 3-6, dadurch gekennzeichnet, daß das Arretiermittel eine Arretierung (88) aufweist, die in der Verbindungsstrebe (62) der schwenkbaren Armauflageanordnung (22) untergebracht ist, wobei die Arretierung (88) in ein vorderes Ende des auskragenden Trägerbauteils (30) eingreift, und daß die Arretierung (88) aus dem Arretiereingriff mit dem auskragenden Trägerbauteil (30) mittels einer hin- und herbewegbaren Stange (78) herausnehmbar ist, die bewegbar durch einen Betätigungsknopf (82) ist, der an dem vorderen Ende des Schwenkarmes (64) der schwenkbaren Armauflageanordnung (22) angeordnet ist.
8. Lehnstuhl nach Anspruch 7, dadurch gekennzeichnet, daß die Arretierung (88) federelastisch vorgespannt ist, um automatisch die schwenkbare Armauflageanordnung (22) zu arretieren, wenn der Sitz (16) in seine abgesenkte Stellung zurückgestellt wird.
EP84902525A 1983-06-18 1984-06-18 Kippmechanismus für einen sitz Expired EP0151141B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84902525T ATE47290T1 (de) 1983-06-18 1984-06-18 Kippmechanismus fuer einen sitz.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB838316651A GB8316651D0 (en) 1983-06-18 1983-06-18 Tilting armchair
GB8316651 1983-06-18

Publications (2)

Publication Number Publication Date
EP0151141A1 EP0151141A1 (de) 1985-08-14
EP0151141B1 true EP0151141B1 (de) 1989-10-18

Family

ID=10544463

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84902525A Expired EP0151141B1 (de) 1983-06-18 1984-06-18 Kippmechanismus für einen sitz

Country Status (9)

Country Link
EP (1) EP0151141B1 (de)
JP (1) JPS60501589A (de)
AU (1) AU564548B2 (de)
DE (1) DE3480166D1 (de)
DK (1) DK74285A (de)
FI (1) FI850635L (de)
GB (1) GB8316651D0 (de)
NO (1) NO850578L (de)
WO (1) WO1985000006A1 (de)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2205230B (en) * 1987-04-24 1990-06-06 Cinnamon Limited J Chair
SE9800593L (sv) * 1998-02-27 1999-09-27 Goeran Linderoth Reglerbart fåtölj- eller stolsätesunderrede avsett att underlätta i- och urstigning från en på detta fastmonterad fåtölj eller stol
WO2003082410A1 (fr) * 2002-04-03 2003-10-09 Oga Co., Ltd Appareil d'assistance a l'exercice
JP5123714B2 (ja) * 2008-04-07 2013-01-23 株式会社松永製作所 プッシュボタンタイプリクライニング車椅子
FI20105532A0 (fi) 2010-05-14 2010-05-14 Jorma Eerola Istuinjärjestely
US8945093B2 (en) 2012-03-20 2015-02-03 Minimally Invasive Surgical Technologies, Inc. Suction device
NL1039910C2 (nl) 2012-11-23 2014-05-27 Anthonius Johannes Tolboom Opstahulp.
WO2015040273A1 (en) 2013-09-17 2015-03-26 Jorma Eerola Arrangement for use of a functional seat

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3259427A (en) * 1965-10-18 1966-07-05 Ray S Wiest Leverage seat lifts
FR2529456B1 (fr) * 1982-06-30 1985-07-12 Fralch Dispositif elevateur pour fauteuil roulant et fauteuil roulant en faisant application

Also Published As

Publication number Publication date
DE3480166D1 (en) 1989-11-23
FI850635A0 (fi) 1985-02-15
NO850578L (no) 1985-02-14
FI850635L (fi) 1985-02-15
AU3069884A (en) 1985-01-11
EP0151141A1 (de) 1985-08-14
JPS60501589A (ja) 1985-09-26
DK74285D0 (da) 1985-02-15
GB8316651D0 (en) 1983-07-20
WO1985000006A1 (en) 1985-01-03
DK74285A (da) 1985-02-15
AU564548B2 (en) 1987-08-13

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