EP1992254A1 - Dispositif de changement de réglage d'un siège - Google Patents

Dispositif de changement de réglage d'un siège Download PDF

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Publication number
EP1992254A1
EP1992254A1 EP07425284A EP07425284A EP1992254A1 EP 1992254 A1 EP1992254 A1 EP 1992254A1 EP 07425284 A EP07425284 A EP 07425284A EP 07425284 A EP07425284 A EP 07425284A EP 1992254 A1 EP1992254 A1 EP 1992254A1
Authority
EP
European Patent Office
Prior art keywords
axis
seat
support
cam means
support unit
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Withdrawn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
EP07425284A
Other languages
German (de)
English (en)
Inventor
Ivan c/o Effe Tre S.r.L. Maghini
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.)
Effe Tre Srl
Original Assignee
Effe Tre Srl
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 Effe Tre Srl filed Critical Effe Tre Srl
Priority to EP07425284A priority Critical patent/EP1992254A1/fr
Publication of EP1992254A1 publication Critical patent/EP1992254A1/fr
Withdrawn legal-status Critical Current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
    • 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
    • A47C1/03294—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest slidingly movable in the base frame, e.g. by rollers
    • 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
    • A47C1/022—Reclining or easy chairs having independently-adjustable supporting parts

Definitions

  • the present invention relates to chairs or armchairs, especially for the office, of the type with variable set up seat, that is, tilting relative to a starting position, generally horizontal, for example forward, to make the use of the keyboard of a computer more comfortable.
  • the invention relates to a device for changing the set up of such seat between a substantially horizontal position and a tilted position.
  • a chair of the type mentioned above usually has a support group located at the top of a base, for example with adjustable height, and a seat support, carrying the seat of the chair or armchair, tilting relative to said support group.
  • the support group usually comprises a box body attached to the base and a back support bracket that may be fixed or oscillating (independent of the seat or synchronised) relative to the stationary body.
  • the inclination of the seat support relative to the support group is obtained by the coupling of shaped pins into respective seats.
  • the object of the present invention is to propose and make a device for changing the set up of a seat which should allow making such adjustment while sitting on the seat of the chair or armchair.
  • Figure 1 shows an exploded perspective view of the device according to the invention
  • Figures 2 and 2a show a perspective view and a side view of the assembled device in a position corresponding to a horizontal seat
  • Figures 3 and 3a show a perspective view and a side view of the assembled device in a position corresponding to a tilted seat
  • figure 4 shows the device applied to an office armchair, with seat in horizontal position
  • figure 5 shows the device applied to an office armchair, with seat in tilted position.
  • reference numeral 10 generally indicates a support unit of a seat 12.
  • a seat support 18 is pivoted on support unit 10.
  • the latter supports a chair 20 of seat 12 ( figures 4 and 5 ).
  • Support unit 10 and seat support 18 are further connected by a set up changing device 14 suitable for defining the inclination of the seat support 18 and thus of seat 20.
  • a support unit 10 for a seat wherein the seat and the back oscillate (in independent or synchronised manner) relative to an upright 16 of a seat 12 on which the support unit is mounted.
  • the support unit 10 essentially comprises a stationary body 13 applied to the top of upright 16, for example with adjustable height, and a bracket 8, to which a back 7 of the seat is connected, oscillating relative to said stationary body 13.
  • reference letter Q indicates the horizontal pivoting axis between bracket 8 and body 13.
  • the set up changing device 14 is associated to the support bracket 8.
  • seat 20 and back 7 are oscillating about axis Q following a movement of the weight of the sitting person.
  • the seat inclination may be changed between a substantially horizontal position and an inclined position, for example up to 10-15°, preferably by about 5 hexagesimal degrees, with the result of changing the seat set up.
  • the set up changing device according to the present invention may in any case be applied also to a fixed support unit, where the stationary body 13 and bracket 8 are integral to each other, for example made as a single piece.
  • the seat support 18 is pivoted to bracket 8 so as to be capable of oscillating about a pivoting axis Y.
  • the seat support 18 comprises, at the top, a plate 22 for fixing seat 20.
  • the movement of support 18 relative to bracket 8 is given by the set up changing device 14 described hereinafter.
  • the set up changing device 14 comprises cam means 24 associated to one between bracket 8 and support 18 so as to be turnable between at least two positions (to which the two set ups of the seat correspond, substantially horizontal and tilted), and transmission means 25 associated to the other of said two bodies and interacting with said cam means 24.
  • transmission means it is meant any element placed in contact with the cam means 24 and suitable for transforming the rotating movement of the cam means into a movement of raising and lowering an end (for example the back end), and thus of oscillation, of the seat support 18 relative to the point of connection thereof with bracket 8.
  • the transmission means 25 also transmit the support weight, plus any weight resting on the seat, to the cam means 24, or vice versa.
  • the transmission means 25 are rigidly connected to the body they are associated to.
  • the set up changing device 14 does not act at the hinging axis Y between support 18 and bracket 8, but it is arranged at a distance from said axis.
  • the cam means 24 are turning about an axis X substantially horizontal and parallel relative to the hinging axis Y, but not coincident therewith.
  • the hinging axis Y that connects bracket 8 to the seat support 18 is located in the proximity of the front end of the support unit 10, whereas the set up changing device 14 is provided in the proximity of the back end of the support unit 10.
  • the cam means 24 are associated to the support bracket 8 whereas the transmission means 25 are integral to the seat support 18.
  • the cam means 24 comprise a plate 26 keyed on a control bar 27 that defines axis X of rotation of said plate 26.
  • bar 27 is supported by and rotates into bushes 28 seated in respective seats obtained in bracket 8.
  • control bar 27 has a polygonal section and inserts into a complementary polygonal hole 30 obtained in plate 26. Bar 27 ends with a control knob 31 that protrudes laterally from the support unit 10 so as to be easily accessible and manoeuvrable by a user, even when this is sitting on the seat.
  • the transmission means 25 comprise a pin 33 engaging in the curved slot 29 of plate 26.
  • Pin 33 is integral to the seat support 18 and is arranged parallel to the axis of rotation X of the cam means 24.
  • control barf 27 crosses bracket 8 from one side to the other.
  • the cam means 24 comprise a pair of plates 26 mounted on opposite end portions of bar 27 protruding from bracket 8.
  • pin 33 extends substantially by the entire width of the seat support 18 so that the ends thereof insert each in a respective curved slot 29.
  • the eccentric profile of the cam means 24 extends along such an arc that at least when said means are rotated so as to cause the inclination of the seat support 18 ( figures 3 , 3a ), the transmission means 25 are in a force balance condition relative to the axes of pivoting Y of the seat support 18 and of rotation X of the cam means 24.
  • angle ⁇ between axis Z and axis W is at the most equal to 90 hexagesimal degrees, preferably slightly less.
  • the weight resting on pin 33 would tend to further rotate plate 26 (in counter clockwise direction in figure 2a ).
  • the plate cannot rotate in this direction since it engages with the end 29" thereof in pin 33.
  • angle ⁇ between axis Z and axis W is at least equal to 90 hexagesimal degrees, preferably slightly more.
  • the weight resting on pin 33 would tend to further rotate plate 26 in opposite direction relative to that of inclination of the seat (in clockwise direction in figure 2a ).
  • the plate cannot rotate in this direction since it engages with the first end 29' thereof in pin 33.
  • the seat set up can therefore be changed by rotating the control knob, for example in counter clockwise direction, until pin 33 reaches the second end 29" of the slot. Thanks to the eccentricity of the contact profile between the slot and the pin, the latter raises tilting the seat support. As mentioned above, thanks to the distance between the point of application of the cam-return element gear and the hinging axis between the seat support and the stationary body, a distance that makes the arm of a lever, it is possible for a user to tilt the seat even while sitting on the seat itself. Once the travel end position of the cam element has been reached, the person's weight will contribute to stabilising the seat set up thanks to the above configuration of the cam element.
  • each end 29' , 29" has retaining teeth 34 for pin 33.
EP07425284A 2007-05-16 2007-05-16 Dispositif de changement de réglage d'un siège Withdrawn EP1992254A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP07425284A EP1992254A1 (fr) 2007-05-16 2007-05-16 Dispositif de changement de réglage d'un siège

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP07425284A EP1992254A1 (fr) 2007-05-16 2007-05-16 Dispositif de changement de réglage d'un siège

Publications (1)

Publication Number Publication Date
EP1992254A1 true EP1992254A1 (fr) 2008-11-19

Family

ID=38566851

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07425284A Withdrawn EP1992254A1 (fr) 2007-05-16 2007-05-16 Dispositif de changement de réglage d'un siège

Country Status (1)

Country Link
EP (1) EP1992254A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021180324A1 (fr) 2020-03-12 2021-09-16 Steelcase Inc. Dispositif de reglage de la pente de l'assise d'un siege

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3627252A (en) * 1969-12-22 1971-12-14 Yoshiomi Yamaguchi Tilting chair
US4290646A (en) * 1978-10-23 1981-09-22 Edel Hans J Inclinable chair
US4695093A (en) * 1985-06-14 1987-09-22 Firma August Froscher G.M.B.H. & Co. K.G. Work chair
JPH02154703A (ja) * 1988-12-08 1990-06-14 Yoshiomi Yamaguchi 椅子の傾動装置
WO2007083186A2 (fr) * 2006-01-23 2007-07-26 Donati S.P.A. Dispositif pour ajuster l'inclinaison d'un dossier ou siege d'une chaise

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3627252A (en) * 1969-12-22 1971-12-14 Yoshiomi Yamaguchi Tilting chair
US4290646A (en) * 1978-10-23 1981-09-22 Edel Hans J Inclinable chair
US4695093A (en) * 1985-06-14 1987-09-22 Firma August Froscher G.M.B.H. & Co. K.G. Work chair
JPH02154703A (ja) * 1988-12-08 1990-06-14 Yoshiomi Yamaguchi 椅子の傾動装置
WO2007083186A2 (fr) * 2006-01-23 2007-07-26 Donati S.P.A. Dispositif pour ajuster l'inclinaison d'un dossier ou siege d'une chaise

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021180324A1 (fr) 2020-03-12 2021-09-16 Steelcase Inc. Dispositif de reglage de la pente de l'assise d'un siege

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