EP0151141B1 - Armchair with tiltable seat - Google Patents
Armchair with tiltable seat Download PDFInfo
- 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
Links
Images
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.
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)
- Chairs Characterized By Structure (AREA)
- Chair Legs, Seat Parts, And Backrests (AREA)
- Chairs For Special Purposes, Such As Reclining Chairs (AREA)
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 (en) | 1985-08-14 |
EP0151141B1 true EP0151141B1 (en) | 1989-10-18 |
Family
ID=10544463
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP84902525A Expired EP0151141B1 (en) | 1983-06-18 | 1984-06-18 | Armchair with tiltable seat |
Country Status (9)
Country | Link |
---|---|
EP (1) | EP0151141B1 (da) |
JP (1) | JPS60501589A (da) |
AU (1) | AU564548B2 (da) |
DE (1) | DE3480166D1 (da) |
DK (1) | DK74285A (da) |
FI (1) | FI850635L (da) |
GB (1) | GB8316651D0 (da) |
NO (1) | NO850578L (da) |
WO (1) | WO1985000006A1 (da) |
Families Citing this family (8)
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 |
JP3830486B2 (ja) * | 2002-04-03 | 2006-10-04 | 株式会社オージーエー | 運動補助具 |
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. |
EP3046443A4 (en) | 2013-09-17 | 2016-09-14 | Tamergo Oy | ARRANGEMENT FOR USE OF A FUNCTIONAL SEAT |
Family Cites Families (2)
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 |
-
1983
- 1983-06-18 GB GB838316651A patent/GB8316651D0/en active Pending
-
1984
- 1984-06-18 JP JP59502562A patent/JPS60501589A/ja active Pending
- 1984-06-18 DE DE8484902525T patent/DE3480166D1/de not_active Expired
- 1984-06-18 EP EP84902525A patent/EP0151141B1/en not_active Expired
- 1984-06-18 WO PCT/GB1984/000215 patent/WO1985000006A1/en active IP Right Grant
- 1984-06-18 AU AU30698/84A patent/AU564548B2/en not_active Ceased
-
1985
- 1985-02-14 NO NO850578A patent/NO850578L/no unknown
- 1985-02-15 FI FI850635A patent/FI850635L/fi not_active Application Discontinuation
- 1985-02-15 DK DK74285A patent/DK74285A/da not_active Application Discontinuation
Also Published As
Publication number | Publication date |
---|---|
DK74285D0 (da) | 1985-02-15 |
FI850635A0 (fi) | 1985-02-15 |
JPS60501589A (ja) | 1985-09-26 |
NO850578L (no) | 1985-02-14 |
DK74285A (da) | 1985-02-15 |
AU3069884A (en) | 1985-01-11 |
DE3480166D1 (en) | 1989-11-23 |
FI850635L (fi) | 1985-02-15 |
WO1985000006A1 (en) | 1985-01-03 |
AU564548B2 (en) | 1987-08-13 |
GB8316651D0 (en) | 1983-07-20 |
EP0151141A1 (en) | 1985-08-14 |
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