EP1050249A1 - Kippstuhl - Google Patents

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Publication number
EP1050249A1
EP1050249A1 EP99108993A EP99108993A EP1050249A1 EP 1050249 A1 EP1050249 A1 EP 1050249A1 EP 99108993 A EP99108993 A EP 99108993A EP 99108993 A EP99108993 A EP 99108993A EP 1050249 A1 EP1050249 A1 EP 1050249A1
Authority
EP
European Patent Office
Prior art keywords
tilting
seat
axis
chair
chair according
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Withdrawn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
EP99108993A
Other languages
English (en)
French (fr)
Inventor
Louis Ellgass
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 EP99108993A priority Critical patent/EP1050249A1/de
Publication of EP1050249A1 publication Critical patent/EP1050249A1/de
Withdrawn legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C3/00—Chairs characterised by structural features; Chairs or stools with rotatable or vertically-adjustable seats
    • A47C3/02—Rocking chairs
    • A47C3/025—Rocking chairs with seat, or seat and back-rest unit elastically or pivotally mounted in a rigid base frame
    • A47C3/0255—Rocking chairs with seat, or seat and back-rest unit elastically or pivotally mounted in a rigid base frame pivotally mounted in the base frame, e.g. swings
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C1/00—Chairs adapted for special purposes
    • A47C1/02—Reclining or easy chairs
    • A47C1/031—Reclining or easy chairs having coupled concurrently adjustable supporting parts
    • A47C1/032—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest
    • A47C1/03255—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest with a central column, e.g. rocking office chairs

Definitions

  • the present invention relates to a tilting chair comprising a basic structure arranged to rest on the ground and a structure tilting mounted on the base structure so that it can tilt around a horizontal axis, the tilting structure comprising a seat and a folder.
  • chair By the term of chair, one intends here to designate any seat provided with a backrest, so also an armchair, a lounge chair, a sofa or a piece of furniture this genre.
  • the invention applies more particularly, but not exclusively, to work chairs such as office chairs, where the occupant stays sit for a long time and often suffer from back pain. This is why chairs like this sometimes have not only a reclining backrest, but also a seat structure that can tilt forward or back to provide a certain variation in the inclination of the seat with the backrest linked to it. he there are many variants of mechanisms allowing such tilting.
  • patent application EP 0 834 271 describes a chair swivel desk with seat and backrest adjustable by tilting around an axis located directly under the seat, near the front edge of the seat.
  • the tilt angle is defined and controlled manually using an eccentric mechanism located under the seat, at the top of the column central of the chair base.
  • This mechanism includes a spring in order to balance the tilting torque created by the weight of the occupant.
  • chairs of this kind do not allow the seat to be tilted and the backrest only to a limited extent, in particular towards the rear, otherwise the occupant weight could tip the chair over when the angle of tipping becomes great.
  • the present invention aims to provide a tilting chair on which the occupant can tilt the seat and the backrest widely backwards, at an angle sufficient for the majority of his body weight to rest on the backrest, thus relieving his spine, especially in the lumbar region, without the risk of the chair tipping over and especially without the need to enlarge its base to prevent this risk.
  • the invention relates to a tilting chair of the genre defined above, characterized in that the tilt axis is located higher than an upper surface of the seat, forming a seating surface for an occupant.
  • the tilt axis is in the region of occupant's hips seated in the seat.
  • a basic idea of the invention is to place the axis of tilting in the region where the occupant's center of gravity is located, or more exactly the center of gravity of the whole formed by the structure tilting and occupying.
  • the office chair shown in the drawings consists of a basic structure 1, provided with a base 2 having casters 3 for rest on the ground, and a tilting structure 4 mounted on the structure of base 1 so that it can tilt around a horizontal axis 5 at the option of the user.
  • the switching takes place between two fixed positions which are shown in Figure 1, namely a so-called position seat, in which the tilting structure 4 (shown in solid lines) offers the normal position of a chair, where the weight of the occupant rests basically on the seat, while the tilted back position (shown in dotted lines in 4 ') is used to rest the weight of the occupant essentially on the record.
  • the basic structure 1 has a metal upper frame pivotally adjustable high on the base 2.
  • This frame here comprises a vertical central tube 6 telescopically mounted on the base 2 thanks to a gas spring, a horizontal cross member 7 and a horizontal beam 8. Height adjustment is carried out in the usual way by means of a lever 9.
  • the structure tilting 4 is provided with a seat 11, a backrest 12, two elements of armrests 13 and of a support element 14 for the occupant's legs.
  • the seat 11 is fixed on a central support 16 provided with a cross member 19 and a longitudinal slide 17 in which is engaged a longitudinal arm 18 of the support element 14, which allows the element 14 to be retracted under the seat when not needed, and pull it forward to a chosen position to support the legs.
  • the support force of the legs is enough to wedge the arm 18 in the slide to maintain the desired position.
  • the backrest frame 12 includes at least one curved amount 20 fixed to a base part 21 pivotally supported by the support 16 of the seat by means of a joint 22 with a horizontal axis and a jack gas 23 housed inside the support 16.
  • the occupant controls this cylinder by means of a lever 24 to adjust the inclination of the backrest 12 relative to seat 11 in a limited angular range, for example, of the order of 15 to 20 °.
  • a lateral support 26 On each end of the cross member 7 of the basic structure is fixed a lateral support 26 whose upper end is connected by a articulation 27 to a leg 28 fixed under the armrest element 13 on the side matching chair.
  • the two joints 27 thus support the tilting structure 4 and define the tilting axis 5.
  • a pair of side handles 29 is mounted on the basic structure 1 to allow the occupant to carry out the movements of the structure tilting 4 when seated on it.
  • each handle 29 is fixed to the corresponding lateral support 26 and is located at neighborhood of seat 11, slightly lower than the latter.
  • the position of handles 29 is fixed, but a position adjustment can be provided according to the user.
  • the function of the handles 29 can be fulfilled by any element linked to the basic structure 1, provided that this element is at a sufficient distance from the tilt axis 5 and either within reach of an occupant's hand or foot.
  • the basic structure 1 is equipped with a stop rear 30, preferably adjustable, against which an element of the tilting structure, in this case the amount 20 of the backrest 12.
  • the rear stopper 30 is formed by a roller fixed in a fork 31 of the rear end of the side member 8. Each end of the roller 30 is provided with a bolt engaged in a vertical slot 32 of the branch fork 31, which allows you to adjust the level of the stop 30 and therefore the tilted position 4 'by blocking the bolt at the desired level in the slot 32.
  • a horizontal adjustment of the stopper 30 can also be provided.
  • FIG. 3 and 4 show in more detail the front stop 34 and the locking mechanism 35.
  • the front stop 34 is constituted by the face upper part of the front part of the spar 8, surface against which the part front of the central support 16 of the tilting part is supported in the position seat.
  • the support 16 is locked in this position by hooking its front edge 36 behind a lock 37 of the locking mechanism 35.
  • the latch 37 is vertically sliding in a slide 38 fixed at the end of the spar 8 and it has a horizontal finger 39 engaged through a slot 40 of the slide 38.
  • This slide contains a spring 41 pushing the lock up.
  • the edge 36 can be formed by a support plate 42 fixed under the support 16.
  • the locking mechanism 35 is provided with a manual control of unlocking 44 having a control handle 45 preferably located at below one of the fixed handles 29, as shown in FIG. 1.
  • the handle 45 is formed by a end of a lever having a horizontal axis 46 pivoting in lugs 47 fixed to the beam 8, this axis carrying another arm 48 which rests on the finger 39 of latch 37 to lower it when the handle 45 is pulled towards the high, thus unlocking the tilting structure 4.
  • the unlocking command 44 can be replaced by a command to cable, for example.
  • the operation of the chair is as follows.
  • the occupant can use the chair exactly like a traditional office chair, including making it pivot around the vertical axis of base 2, adjust the height of the seat 11 using lever 9 and adjust the inclination of the backrest 12 using the lever 24.
  • the support element 14 for the legs can be retracted as shown in Figure 1 or pulled forward below the front edge of the seat 11. This last position is preferable before performing a tilt backwards.
  • the central support 16, and with it the seat 11, is blocked by the locking mechanism 35.
  • the condition essential is that the tilt axis 5 is at a certain height above the upper surface of the seat 11, forming a seating surface 50 which supports the weight of the occupant in a seated position.
  • the level to consider of this seat surface is preferably the one it occupies when the seat 11, generally padded, is compressed by the weight of the occupant.
  • the applicant observed that the operation is satisfactory when axis 5 is located between 10 cm and 20 cm, preferably approx. 15 cm, above the seating surface 50.
  • the stability of the chair is optimal when axis 5 is above the center of base 2, but a slight offset can be expected without putting endangered stability.
  • the axis 5 is in the sitting position, slightly forward and / or below the common center of gravity of the occupant and the tilting structure 4. With the levels mentioned above for axis 5, this condition is generally filled when the tilt axis 5 is located at a distance between 10 cm and 30 cm, preferably about 20 cm, from the front of the folder 12 when the latter is close to vertical.
  • each element armrest 13 is such that no part of it can act like scissors passing by the lateral support 26.
  • the present invention can be implemented from a type any chair, armchair or similar seat, by the addition of simple, inexpensive and functioning mechanisms safe. Thanks to a judicious choice of the position of the tilting axis, the occupant can carry out the tilting maneuvers by efforts minimal and therefore does not need a multiplier mechanism, nor a spring compensator or other similar devices.

Landscapes

  • Health & Medical Sciences (AREA)
  • Dentistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Chairs Characterized By Structure (AREA)
  • Chairs For Special Purposes, Such As Reclining Chairs (AREA)
EP99108993A 1999-05-06 1999-05-06 Kippstuhl Withdrawn EP1050249A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP99108993A EP1050249A1 (de) 1999-05-06 1999-05-06 Kippstuhl

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP99108993A EP1050249A1 (de) 1999-05-06 1999-05-06 Kippstuhl

Publications (1)

Publication Number Publication Date
EP1050249A1 true EP1050249A1 (de) 2000-11-08

Family

ID=8238125

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99108993A Withdrawn EP1050249A1 (de) 1999-05-06 1999-05-06 Kippstuhl

Country Status (1)

Country Link
EP (1) EP1050249A1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009059602A2 (de) * 2007-11-06 2009-05-14 Proemm Felix Tobias Sitzvorrichtung

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4861106A (en) * 1987-06-24 1989-08-29 Horst Sondergeld Seat for an office chair or the like, with seat and back adjustable, especially by body weight displacement
WO1989010080A1 (en) * 1988-04-25 1989-11-02 Perry Charles O Reclining chair
EP0515120A1 (de) * 1991-05-16 1992-11-25 Michael Blaise Mugford Schaukelstuhl
DE19531511A1 (de) * 1995-08-26 1997-02-27 H C Pfeiffer Gmbh Sitzmöbel
EP0834271A2 (de) 1996-10-01 1998-04-08 Sedus Stoll AG Sitzmöbel mit neigbarem Sitz und Rückenlehne

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4861106A (en) * 1987-06-24 1989-08-29 Horst Sondergeld Seat for an office chair or the like, with seat and back adjustable, especially by body weight displacement
WO1989010080A1 (en) * 1988-04-25 1989-11-02 Perry Charles O Reclining chair
EP0515120A1 (de) * 1991-05-16 1992-11-25 Michael Blaise Mugford Schaukelstuhl
DE19531511A1 (de) * 1995-08-26 1997-02-27 H C Pfeiffer Gmbh Sitzmöbel
EP0834271A2 (de) 1996-10-01 1998-04-08 Sedus Stoll AG Sitzmöbel mit neigbarem Sitz und Rückenlehne

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009059602A2 (de) * 2007-11-06 2009-05-14 Proemm Felix Tobias Sitzvorrichtung
WO2009059602A3 (de) * 2007-11-06 2010-02-04 Proemm Felix Tobias Sitzvorrichtung

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