WO2012072675A1 - Office chair mechanism provided with a device for adjusting the swivel force. - Google Patents
Office chair mechanism provided with a device for adjusting the swivel force. Download PDFInfo
- Publication number
- WO2012072675A1 WO2012072675A1 PCT/EP2011/071373 EP2011071373W WO2012072675A1 WO 2012072675 A1 WO2012072675 A1 WO 2012072675A1 EP 2011071373 W EP2011071373 W EP 2011071373W WO 2012072675 A1 WO2012072675 A1 WO 2012072675A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- lever
- chair
- interposed
- elastic means
- movable
- Prior art date
Links
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
- A47C1/03261—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest characterised by elastic means
- A47C1/03283—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest characterised by elastic means with fluid springs
-
- 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
- A47C1/03205—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest having adjustable and lockable inclination
- A47C1/03238—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest having adjustable and lockable inclination by means of peg-and-notch or pawl-and-ratchet mechanism
-
- 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
-
- 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
- A47C1/03261—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest characterised by elastic means
- A47C1/03266—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest characterised by elastic means with adjustable elasticity
-
- 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
- A47C1/03261—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest characterised by elastic means
- A47C1/03272—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest characterised by elastic means with coil springs
-
- 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
Definitions
- the present invention relates to an office chair mechanism provided with a device for adjusting the swivel force.
- the main drawback of this system is the fact that the preload adjustment cannot be too large otherwise insurmountable problems are introduced relating to spring reliability and chair design compactness.
- an always critical comprom ise has to be reached between the physical force and the down-gearing (large number of screw turns) required for the adjustment.
- the main drawback from the ergonomic viewpoint is that because the force increase during swivelling is always constant and if a "light" user encounters excessive hardness during swivelling, this for a "heavy” user could possibly be insufficient.
- An object of the invention is to eliminate these drawbacks by providing an adjustment device which while being compact, sufficiently economical and of simple and very wide adjustment, is also ergonomically suitable for both very light and very heavy users.
- Figure 1 is a lateral schematic view of a chair provided with the device of the invention in its non-stressed condition
- Figure 2 shows it in the same view as Figure 1 but in the stressed condition
- Figure 3 is an exploded perspective view of the device of the invention showing the adjustment system in detail
- Figures 4 and 5 are schem atic views of the device of the invention shown respectively in the chair empty and chair stressed configuration
- Figures 6 and 7 show the device in the same views as Figures 4 and 5 but with the fulcrum in a different position
- FIGS 8 and 9 are schematic views of two different embodiments of the device of the invention.
- Figures 10, 1 1 and 12 show a detail of the device of the invention for locking chair swivelling.
- the adjustment device according to the invention is applied to an office chair mechanism consisting of a fixed box structure 2 provided lowerly with a frusto-conical bush for inserting the upper end of the shaft 4 of a traditional gas spring (not represented in the drawings), the function of which is to sustain the support as it swivels relative to a resting base 6.
- the fixed box structure 2 is hinged about a pin 8 slidable within a horizontal slotted hole 10 provided in a support plate 12 for the chair seating portion 14.
- a bar 18 rigid with a support arm 20 for the back rest 22 is pivoted about a pin 16 on the plate 12.
- the beam is finally pivoted to the box structure 2 about a pin 24.
- the other end 36 of the lever 28 acts on a helical spring 38 which acts against the surface of the box structure (see Figures 4-7) or against the chair support plate 12 (see Figure 8) or against the support bar 18 for the back rest 22 (see Figure 9).
- the adjustment of the position of the contact element 30 takes place along said parallel resting surfaces 32, 32', by which any other movement of the helical spri ng 38 and of the lever 28 is avo ided .
- the element which undergoes movement is not subjected to compression when the surfaces are parallel, i.e. when the chair is in the rest position, whereas it becomes the fulcrum of the lever 28 during swivelling.
- the elements involved in the adjustment are therefore reduced to a minimum. This characteristic therefore enables easy and quick adjustment while using reliable low-cost components, for exam ple by using a simple cam device 34 which moves the contact element (pin) 30.
- the lever has a shape such that the contact element 30, following its adjustment movement, maximizes the difference between the two lever arms.
- the cam device is mounted on a single control rod 40 which is provided at one end with a knob 42 for rotating the cam 34 and with a knob 44 for operating a gas spring, and at the other end with a knob 46 for locking the rotation of the back rest.
- slide shoes 48 of self-lubricating plastic material are provided (wrapped about the pin).
- a catch is provided formed from two plates 50 operable axially by an elastic puller 52 connected to the knob 46 controlling the locking operation.
- the plates 50 are selectively insertable into two of a plurality of facing seats 54 (six in the illustrated example) provided in the bar 18 such as to lock its rotation and hence lock the chair.
- Figures 4 and 5 show the spring compression as the chair passes from a configuration in which the chair is not stressed to a configuration in which a user is seated on the chair and has inclined the back rest rearwards to hence stress the spring.
- Figures 6 and 7 show the chair in the same configurations as in Figures 4 and 5, but with the fulcrum 30 shifted along the surfaces 32, 32' in the sense of causing it to approach the axis of the pivot pin 16.
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)
- Spinning Or Twisting Of Yarns (AREA)
- Threshing Machine Elements (AREA)
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP11801635.1A EP2645904B1 (en) | 2010-12-03 | 2011-11-30 | Office chair mechanism provided with a device for adjusting the swivel force |
PL11801635T PL2645904T3 (en) | 2010-12-03 | 2011-11-30 | Office chair mechanism provided with a device for adjusting the swivel force |
BR112013013094-6A BR112013013094B1 (en) | 2010-12-03 | 2011-11-30 | MECHANISM FOR OFFICE CHAIR EQUIPPED WITH A FORCE ADJUSTMENT DEVICE FOR CHANGE OF POSITION |
CN201180058087.2A CN103237479B (en) | 2010-12-03 | 2011-11-30 | Be provided with the office chair mechanism of the device for adjusting revolving force |
US13/879,970 US8985688B2 (en) | 2010-12-03 | 2011-11-30 | Office chair mechanism provided with a device for adjusting the swivel force |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ITVE2010A000062 | 2010-12-03 | ||
ITVE2010A000062A IT1403471B1 (en) | 2010-12-03 | 2010-12-03 | MECHANISM FOR OFFICE CHAIRS PROVIDED WITH A SWINGING FORCE ADJUSTMENT DEVICE. |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2012072675A1 true WO2012072675A1 (en) | 2012-06-07 |
Family
ID=43737531
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2011/071373 WO2012072675A1 (en) | 2010-12-03 | 2011-11-30 | Office chair mechanism provided with a device for adjusting the swivel force. |
Country Status (7)
Country | Link |
---|---|
US (1) | US8985688B2 (en) |
EP (1) | EP2645904B1 (en) |
CN (1) | CN103237479B (en) |
BR (1) | BR112013013094B1 (en) |
IT (1) | IT1403471B1 (en) |
PL (1) | PL2645904T3 (en) |
WO (1) | WO2012072675A1 (en) |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
TW201311188A (en) * | 2011-07-15 | 2013-03-16 | Itoki Corp | Rocking chair and spring unit used therefor |
JP6009891B2 (en) * | 2011-11-04 | 2016-10-19 | 株式会社岡村製作所 | Chair |
DE202013102059U1 (en) * | 2013-05-11 | 2014-08-12 | Bock 1 Gmbh & Co. Kg | synchronous mechanism |
CN105380435A (en) * | 2015-12-09 | 2016-03-09 | 中威控股集团有限公司 | Seat support plate, base plate thereof, base plate forming method, and base plate installation structure |
IT201600071468A1 (en) * | 2016-07-08 | 2018-01-08 | Co Fe Mo Ind S R L | OSCILLATION MECHANISM FOR CHAIRS |
TWI685317B (en) * | 2016-10-07 | 2020-02-21 | 堡勝企業股份有限公司 | Chair back cushion adjustment device and chair with chair back cushion adjustment device |
US10155455B1 (en) * | 2017-06-14 | 2018-12-18 | Tung Yu O.A. Co., Ltd. | Combining structure between seat body and seat chassis of chair |
US11246417B2 (en) * | 2019-08-07 | 2022-02-15 | Chen Raizman | Tilt-swivel mechanism chair |
JP2023132854A (en) * | 2022-03-11 | 2023-09-22 | 株式会社オカムラ | Chair |
Citations (4)
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US6238000B1 (en) | 1998-02-04 | 2001-05-29 | Unit Press Limited | Mechanism for chair |
EP1358821A1 (en) * | 2002-04-30 | 2003-11-05 | Klöber Gmbh & Co. | Office chair with a user-weight-dependent energy storage device |
WO2006114250A1 (en) * | 2005-04-28 | 2006-11-02 | Imarc S.P.A. | Device for adjusting the reclinning force in office chair mechanisms |
EP1911371A1 (en) * | 2006-10-10 | 2008-04-16 | Interstuhl Büromöbel GmbH & Co. KG | Seating furniture, in particular an office chair |
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-
2010
- 2010-12-03 IT ITVE2010A000062A patent/IT1403471B1/en active
-
2011
- 2011-11-30 CN CN201180058087.2A patent/CN103237479B/en active Active
- 2011-11-30 EP EP11801635.1A patent/EP2645904B1/en active Active
- 2011-11-30 PL PL11801635T patent/PL2645904T3/en unknown
- 2011-11-30 BR BR112013013094-6A patent/BR112013013094B1/en active IP Right Grant
- 2011-11-30 WO PCT/EP2011/071373 patent/WO2012072675A1/en active Application Filing
- 2011-11-30 US US13/879,970 patent/US8985688B2/en active Active
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6238000B1 (en) | 1998-02-04 | 2001-05-29 | Unit Press Limited | Mechanism for chair |
EP1358821A1 (en) * | 2002-04-30 | 2003-11-05 | Klöber Gmbh & Co. | Office chair with a user-weight-dependent energy storage device |
WO2006114250A1 (en) * | 2005-04-28 | 2006-11-02 | Imarc S.P.A. | Device for adjusting the reclinning force in office chair mechanisms |
EP1874161A1 (en) | 2005-04-28 | 2008-01-09 | Imarc S.p.A. | Device for adjusting the reclinning force in office chair mechanisms |
EP1911371A1 (en) * | 2006-10-10 | 2008-04-16 | Interstuhl Büromöbel GmbH & Co. KG | Seating furniture, in particular an office chair |
Also Published As
Publication number | Publication date |
---|---|
CN103237479A (en) | 2013-08-07 |
PL2645904T3 (en) | 2015-03-31 |
ITVE20100062A1 (en) | 2012-06-04 |
BR112013013094B1 (en) | 2020-03-03 |
EP2645904B1 (en) | 2014-08-20 |
BR112013013094A2 (en) | 2016-08-16 |
EP2645904A1 (en) | 2013-10-09 |
US8985688B2 (en) | 2015-03-24 |
IT1403471B1 (en) | 2013-10-17 |
US20130234485A1 (en) | 2013-09-12 |
CN103237479B (en) | 2016-03-23 |
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