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EP3096650B1 - Mechanismus zur betätigung einer einstellvorrichtung eines bürostuhls und zugehörige einstellungsvorrichtung - Google Patents

Mechanismus zur betätigung einer einstellvorrichtung eines bürostuhls und zugehörige einstellungsvorrichtung Download PDF

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Publication number
EP3096650B1
EP3096650B1 EP15701847.4A EP15701847A EP3096650B1 EP 3096650 B1 EP3096650 B1 EP 3096650B1 EP 15701847 A EP15701847 A EP 15701847A EP 3096650 B1 EP3096650 B1 EP 3096650B1
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EP
European Patent Office
Prior art keywords
coupled
locking
switching lever
pin
mechanism according
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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.)
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EP15701847.4A
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English (en)
French (fr)
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EP3096650A1 (de
Inventor
Gino Beccegato
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.)
LIMA SNC Di Riccardo Ed Elisa Beccegato
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LIMA SNC Di Riccardo Ed Elisa Beccegato
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    • 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
    • A47C1/024—Reclining or easy chairs having independently-adjustable supporting parts the parts, being the back-rest, or the back-rest and seat unit, having adjustable and lockable inclination

Definitions

  • the object of the present application refers to a mechanism for actuating an adjusting device of office-type chairs.
  • the present application refers to an office chair provided with movable parts such as the seat, back, armrests adjustable by suitable adjusting devices.
  • an object of the present application is an adjusting device for office-type chairs and a chair comprising at least one such device.
  • a chair and particularly an office chair, in order to be ergonomic and satisfy regulatory requirements must be provided with two or more adjusting devices enabling to modify the tilt of the movable parts in order to be adapted to the contour of each user.
  • a known solution is described in the International Patent application No. WO97/07715A1 (Global Upholstery LTD; Tedesco Romeo) which relates to a control mechanism for a chair.
  • Another solution is found in the US Patent No. US4,901,594 (Selzer ) that relates to a gas spring assembly for a passenger seat control.
  • the adjusting device In order to find a wide and advantageous use, the adjusting device must be easy and prompt to be used, with smooth and simple operations. Moreover, the adjusting device must ensure a determined safety.
  • the adjusting device which is made reference to, is, particularly but not limitatively, the one described in the European patent No. EP 2 255 697 B1 obtained by the same Applicant.
  • Such locking/unlocking device substantially comprises a box structure having a support coupled to the moveable parts of the chair and articulated to an axially movable pin.
  • the pin projects laterally from the box structure and is moved by a rotating knob graspable by the user.
  • the knob Clockwise or counterclockwise rotating the knob actuates the axially movable pin for enabling to adjust the support and enabling to stop the seat and/or back tilt according to desired positions.
  • the knob is located in proximity with the box structure and axially with the adjusting pin.
  • the user For obtaining the desired rotation of the knob, the user is compelled to stretch himself/herself under the seat by taking uncomfortable and awkward positions.
  • An alternative solution provides to actuate the adjusting device by a spring pushbutton associated to a mechanism provided with a cylinder having suitable alternate lock side slots, which is axially coupled to the pin.
  • the cylinder By actuating the spring pushbutton the cylinder axially moves the pin in order to enable to stop the seat and/or back according to the desired positions.
  • a known solution provides to interpose a wire connection between the adjusting pin and the spring pushbutton in order to position the pushbutton in a more comfortable position for the user.
  • the technical problem underlying the present application consists of devising an actuating mechanism for an adjusting device for office-type chairs, having structural and operative features such to meet the requested requirements, overcoming the disadvantages cited with reference to the prior art.
  • the idea of solution underlying the present invention consists of providing a couple to articulated elements cooperating one to each other to activate the adjusting pin without impairing the actuating features and having operative efficiency and a structural simplicity.
  • the chair 1 in the illustrated embodiment, comprises a substantially box structure 100 which is associable to a seat and/or a back and is suitable to adjust their tilt.
  • the box structure 100 comprises an upper half-shell 102 and a supporting element 104 articulated by a pin 105 to a lower half-shell 101.
  • the seat 103 is fixed to the upper half-shell 102 by interposed transversal brackets 106.
  • the supporting element 104 has a portion projecting from the upper half-shell 102 which is coupled to a perpendicularly positioned back 108 by the interposition of a back blade.
  • An adjusting device 2 enables to lock the upper half-shell 102 and therefore the seat 103 with respect to the lower half-shell 101, in order to adjust the tilt of the seat 103.
  • a further adjusting device 2 enables to lock the supporting element 104 to the lower half-shell 101 enabling in this way to adjust the tilt of the back 108.
  • Each adjusting device 2 comprises a locking assembly 4 axially inserted in a respective sleeve 9.
  • the sleeve 9 has a prevalent longitudinal extension along a first direction X-X and is outwardly and perpendicularly coupled to the side surface of the lower half-shell 101.
  • the locking assembly 4 comprises a locking pin 5 axially extending along a first direction X-X and moves axially and in parallel in the first direction X-X, countering a first and second return springs 6 and 7.
  • the first and second springs 6 and 7 are coaxially located with respect to the locking pin 5.
  • the locking pin 5 has a free end 5a projecting from the sleeve 9 and suitable for being engaged with dedicated interconnecting holes formed in the side surface of the lower half-shell 101 and at the side surface of the upper half-shell 102 and/or of the supporting element 104, for locking and unlocking the same with respect to the axial movement of the adjusting pin 5, from a locking position to an unlocking position.
  • the locking pin 5 has a terminal end 5b, opposite to the free end 5a.
  • the first spring 6 is inserted from the free end 5a and abuts against an edge 5c annular with respect to the locking pin 5.
  • the second spring 7 is inserted from the terminal end 5b, coaxially with the locking pin 5 and abuts against the edge 5c on the opposite portion with respect to the first spring 6.
  • a cylindrical bush 8 comprises a centrally hollow gripping surface 8a which is perimetrally provided with a plurality of wings 8b. The bush 8 is coaxially inserted with respect to the locking pin 5, the second spring 7 being pressure inserted among the wings 8b.
  • the locking pin 5 of the adjusting device 2 is suitable for being driven by an actuating mechanism 3, according to the present invention.
  • the actuating mechanism 3 comprises a motion transmission 10 to convert a rotation motion to a translational motion coupled to the locking assembly 4.
  • the motion transmission 10 is suitable for actuating the axial movement of the locking pin 5, from the locking position to the unlocking position and viceversa, by means of the rotation of a switching lever 20.
  • the switching lever 20 is rotatably coupled to a supporting block 30 and is coupled to the motion transmission 10 by the interposition of connecting means 40.
  • the switching lever 20 is selectively positioned in a first stopping position and a second stopping position. According to one embodiment, the switching lever 20 is activated by a user.
  • the locking pin 5 is translated by the motion transmission 10 actuated by said connecting means 40.
  • the supporting block 30 is associable to the seat 103 of the chair 1 in a predetermined position comfortable to an user, for example downwardly associated in proximity of the peripheral portion.
  • the motion transmission 10 comprises a thrust member 15 that is rotatably coupled to the side surface of the sleeve 9 by a pin 19 and is suitable for cooperating with the locking assembly 4.
  • the pin 19, coupled to the sleeve 9, is located with an axis Z-Z substantially normal to the first direction X-X and the axis of the locking pin 5.
  • the thrust member 15 is provided with a thrust wall 16, substantially a plate that is perpendicularly coupled to a hooking portion or wall 17 in order to define an L-shaped hooking element.
  • a hooking edge of the element is adapted to comprise a hole for housing of the rotating pin 19.
  • the thrust wall 16 is located in proximity of the bush 8 and terminal end 5b of the locking pin 5.
  • the connecting means 40 are coupled to the hooking wall 17 and are suitable for putting in rotation the thrust member 15 on said rotating pin 19 from a release position to a thrust position.
  • the thrust wall 16 In the release position, illustrated in Figure 15b , the thrust wall 16 is arranged facing the bush 8, while in the thrust position, illustrated in Figure 12b , the thrust wall 16 is rotated about the pin 19 until it takes a position substantially normal to the gripping surface 8a of the bush 8.
  • the connecting means 40 comprises a cable 41 having a first end 42 removably coupled to the switching lever 20 and a second end 43 coupled to the hooking wall 17 of the thrust member 15.
  • the connecting means 40 can further comprise first and second coupling means, 60 and 65, respectively suitable for coupling the first end 42 of cable 41 to the supporting block 30 and the second end 43 of sleeve 9, in an optimal position in proximity of the motion transmission 10 and switching lever 20.
  • the cable 41 is slidingly inserted in an outer protection sheath 41a comprising, in an embodiment, said first and second coupling means, 60 and 65.
  • the locking support 30 is a substantially parallelepiped hollow body provided with an abutment base 31 prevalently developing along a second direction A-A. Opposing longitudinal side walls 32a and 32b extend from base 31 and between opposite end profiles 32c and 32d.
  • the switching lever 20 has a transversal hole 22 extending in a third direction Y-Y which, when the switching lever 20 is associated to the supporting block 30, is substantially normal to the second direction A-A.
  • the hole 22 is suitable for housing a rotating pin 21.
  • the ends of the rotating pin 21 project from the hole 22 and are received in respective seats 24a, 24b formed in said opposing side walls 32a and 32b.
  • the seats 24a and 24b are positioned in proximity of the end profile 32c in order to keep the switching lever 20 with a first portion 20a projecting from the end profile 32c.
  • the switching lever 20 is integrally formed with the first portion 20a, substantially a small plate adapted to be gripped and moved by the user.
  • the first portion 20a is coupled to a second portion 20b formed by a substantially parallelepiped body positioned between said opposing side walls 32a, 32b.
  • Coupling or stopping means 25 are interposed between the supporting block 30 and the switching lever 20 and are suitable for interrupting the rotation of the switching lever 20 at least in a stopping position.
  • the stopping means 25 comprise a resiliently deformable element 26, 27a, 27b suitable for cooperating with at least one locking element 33a, 33b, 34a, 34b.
  • the stopping means 25 comprise a spring 26 and a pair of balls 27a, 27b.
  • the spring 26 is preloaded and housed with the pair of balls 27a, 27b in a housing 23, substantially a second transversal hole 23 extending along a direction Y'-Y' substantially parallel to the third direction Y-Y of the hole 22 adapted to house the rotating pin 21.
  • a first locking element is defined by a first pair of notches 33a, 33b and a second locking element is defined by a second pair of notches 34a, 34b made in the opposing side walls 32a, 32b of the supporting block 30.
  • the switching lever 20 when is actuated by the user, rotates about the rotating pin 21, alternatively housing the pair of balls 27a and 27b in the first pair of notches 33a, 33b or in the second pair of notches 34a, 34b, in order to define a stopping position and an unlocking position or a first and a second stopping position.
  • the second portion 20b of the switching lever 20 is shaped in order to have a first hook 28 which, during the operation, projects below the parallelepiped body in the opposite side with respect to the second hole 23.
  • the first hook 28 comprises a fork element 29 coupled to the parallelepiped body and spaced from the latter in order to define a seat 28a housing a first stop 45, substantially shaped as a ball, and coupled to the first end 42 of cable 41.
  • the fork element 29 has a first slot 29a extending in a direction which, during the operation, is substantially parallel to the second direction A-A.
  • the first slot 29a enables to insert the first stop 45.
  • the first locking means 60 comprise a first annular notch 61 formed in the protection sheath 41a and suitable for being pressure inserted in a first opening 35 formed in the supporting block 30 below the end profile 32d.
  • the first coupling means 60 cooperate with the first stop 45 in order to enable a stable connection between the cable 41 and supporting block 30.
  • the second end 43 of cable 41 comprises a second stop 46 inserted in second slot 18a formed in the hooking wall 17 of the thrust member 15, as illustrated in Figures 16 and 17 .
  • the second stop 46 is housed in a dedicated seat 18b, the cable 41 exiting the second slot 18a.
  • the second coupling means 65 comprise a second annular notch 66 formed in the protection sheath 41a and suitable for being pressure inserted in a second opening 67 provided at the side wall of sleeve 9.
  • the second coupling means 65 cooperate with the second stop 46 in order to enable a stable connection between the cable 41 and sleeve 9.
  • a closing element or plug 48 is coupled to the free end of sleeve 9.
  • a suitable design of the involved forces enables to adjust the elasticity of the first and second springs 6 and 7 with respect also to the possible elasticity of the cable 41 and to suitably define the size of the components.
  • the configuration of the actuating mechanism enables to fix the supporting block and therefore the switching lever in any point of the chair, making easy the operation by the user. This fact enables also to position the switching lever substantially independently from the configuration of the chair itself.
  • the present invention also refers to an adjusting device comprising an actuating mechanism according to what has been previously illustrated and described.
  • the present invention refers to an office-type chair comprising one or more adjusting devices singularly provided with a respective actuating mechanism according to what has been described and illustrated.
  • the present invention is susceptible to several variants.
  • the motion transmission converting the rotary motion to a translational one can be implemented by different elements, such as a pin coupled to a worn, a pair of gear wheels and similar.
  • the stopping means between the supporting block and the switching lever can have different and analogous embodiments with respect to the one described, all falling into the scope as defined in the following claims.

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  • Health & Medical Sciences (AREA)
  • Dentistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Chairs For Special Purposes, Such As Reclining Chairs (AREA)
  • Chairs Characterized By Structure (AREA)

Claims (15)

  1. Mechanismus (3) zum Betätigen einer Einstellvorrichtung (2) eines Bürostuhls (1), eine Verriegelungsbaugruppe (4) umfassend, die mit einem Verriegelungsstift (5) versehen ist, der entgegen einem elastisch verformbaren Element (6, 7) aus einer Verriegelungsstellung in eine Entriegelungsstellung axial bewegbar ist, dadurch gekennzeichnet, dass er den Verriegelungsstift (5), der axial entwickelt und entlang einer Richtung X-X bewegbar ist, und das federelastische Element (6, 7), das koaxial in Bezug auf den Verriegelungsstift (5) angeordnet ist, aufweist und eine mit der Verriegelungsbaugruppe (4) gekoppelte Bewegungsübertragungseinrichtung (10) umfasst, um eine Drehbewegung in eine translationale Bewegung umzuwandeln, wobei die Bewegungsübertragungseinrichtung (10) dafür ausgelegt ist, die axiale Bewegung des Verriegelungsstifts (5) mittels einer Drehung eines Schalthebels (20) auszulösen, wobei der Schalthebel (20) drehbar mit einem Auflageblock (30) verbunden ist, der mit dem Stuhl (2) gekoppelt ist, wobei eine Verbindungseinrichtung (40) zwischen der Übertragungseinrichtung (10) und dem Schalthebel (20) angeordnet ist.
  2. Mechanismus nach Anspruch 1, dadurch gekennzeichnet, dass er eine Kupplungseinrichtung (25) umfasst, die zwischen dem Auflageblock (30) und dem Schalthebel (20) angeordnet ist und die dafür ausgelegt ist, den Schalthebel (20) in einer ersten und einer zweiten Anschlagstellung selektiv zu verriegeln, wobei die Kupplungseinrichtung (25) ein elastisch verformbares Element (26, 27a, 27b) umfasst, das dafür ausgelegt ist, mit einem Verriegelungselement (33a, 33b, 34a, 34b) zusammenzuwirken, das mit dem Auflageblock (30) gekoppelt ist.
  3. Mechanismus nach Anspruch 2, dadurch gekennzeichnet, dass das elastisch verformbare Element (26, 27a, 27b) eine Feder (26) und mindestens eine Kugel (27a, 27b) umfasst.
  4. Mechanismus nach Anspruch 2, dadurch gekennzeichnet, dass das elastisch verformbare Element (26, 27a, 27b) eine Feder (26) und zwei Kugeln (27a, 27b) umfasst, wobei die Feder (26) vorbelastet und in einem Gehäuse (22) quer zum Schalthebel (20) untergebracht ist.
  5. Mechanismus nach Anspruch 2, dadurch gekennzeichnet, dass das Verriegelungselement (33a, 33b, 34a, 34b) ein erstes Paar Kerben (33a, 33b) und ein zweites Paar Kerben (34a, 34b) umfasst, die dafür ausgelegt sind, die beiden Kugeln (27a, 27b) abwechselnd aufzunehmen.
  6. Mechanismus nach Anspruch 1, dadurch gekennzeichnet, dass der Auflageblock (30) im Wesentlichen ein Parallelflach-Hohlkörper ist, der mit einer Anschlagsbasis (31) versehen ist, die sich hauptsächlich entlang einer zweiten Richtung (A-A) erstreckt, und mit einander gegenüberliegenden Seitenwänden (32a, 32b) versehen ist, wobei der Schalthebel (20) mit den einander gegenüberliegenden Seitenwänden (32a, 32b) mittels eines Drehzapfens (21) gekoppelt ist.
  7. Mechanismus nach Anspruch 6, dadurch gekennzeichnet, dass der Drehzapfen (21) so angeordnet ist, dass er einen ersten Abschnitt (20a) des Schalthebels (20) außerhalb des Auflageblockes (6) und einen zweiten Abschnitt (20b), der zwischen den einander gegenüberliegenden Seitenwänden (32a, 32b) angeordnet ist, definiert, wobei der zweite Abschnitt (20b) mit der Verbindungseinrichtung (40) gekoppelt ist.
  8. Mechanismus nach Anspruch 6, dadurch gekennzeichnet, dass der Schalthebel (20) entlang der zweiten Richtung (A-A) angeordnet ist und ein quer verlaufendes Loch (22) aufweist, das sich in einer dritten Richtung (Y-Y) erstreckt, die im Wesentlichen senkrecht ist zur zweiten Richtung (A-A), wobei das Loch (22) dafür ausgelegt ist, den Drehzapfen (21) aufzunehmen.
  9. Mechanismus nach Anspruch 1, dadurch gekennzeichnet, dass die Verriegelungsbaugruppe (4) eine Hülse (9) umfasst, die dafür ausgelegt ist, den Verriegelungsstift (5) zu umschließen, die axial und parallel zur Richtung X-X angeordnet ist, wobei die Bewegungsübertragungseinrichtung (10) ein Schubelement (15) umfasst, das mittels eines Drehzapfens (19) drehbar mit der Hülse (9) gekoppelt ist, wobei das Schubelement (15) dafür ausgelegt ist, mit der Verriegelungsbaugruppe (4) zusammenzuwirken.
  10. Mechanismus nach Anspruch 9, dadurch gekennzeichnet, dass der Drehzapfen (19) eine Achse (Z-Z) aufweist, die im Wesentlichen senkrecht ist zur Richtung X-X, wobei das Schubelement (15) eine Schubwand (16) umfasst, die mit einer Einhakwand (17) gekoppelt ist, wobei die Schubwand (16) dafür ausgelegt ist, den Verriegelungsstift (5) zu aktivieren.
  11. Mechanismus nach Anspruch 10, dadurch gekennzeichnet, dass der Schalthebel (20) selektiv in einer ersten und in einer zweiten Stellung positioniert wird und dafür ausgelegt ist, die Verbindungseinrichtung (40), die mit der Einhakwand (17) gekoppelt ist, zu aktivieren und dafür ausgelegt ist, das Schubelement (15) am Drehzapfen (19) zu drehen.
  12. Mechanismus nach Anspruch 10, dadurch gekennzeichnet, dass die Verbindungseinrichtung (40) ein Kabel (41) umfasst mit einem ersten Ende (42), das mit dem Schalthebel (20) gekoppelt ist, und einem zweiten Ende (43), das mit dem Schubelement (15) gekoppelt ist.
  13. Einstellvorrichtung (2), einen Mechanismus nach einem oder mehreren der Ansprüche 1 bis 12 und eine Verriegelungsgruppe (4) umfassend, die mit einem Verriegelungsstift (5) versehen ist, der axial aus einer Verriegelungsstellung in eine Entriegelungsstellung bewegbar ist und dafür ausgelegt ist, durch den Betätigungsmechanismus (3) aktiviert zu werden.
  14. Bürostuhl (1), mindestens eine Einstellvorrichtung (2) gemäß Anspruch 13 umfassend.
  15. Stuhl (1) nach Anspruch 14, dadurch gekennzeichnet, dass er eine Kastenstruktur (100) umfasst, die mit einem Sitz (103) und/oder einer Rückenlehne (108) gekoppelt ist, wobei die Kastenstruktur (100) eine obere Halbschale (102) und ein Trägerelement (104) umfasst, das durch einen Zapfen (105) gelenkig mit einer unteren Halbschale (101) verbunden ist, wobei mindestens eine Einstellvorrichtung (2) mit der unteren Halbschale (101) gekoppelt ist und der Verriegelungsstift (5) dafür ausgelegt ist, die obere Halbschale (102) in Bezug auf die untere Halbschale (101) zu verriegeln, um die Neigung des Sitzes (103) und/oder der Rückenlehne (108) einzustellen.
EP15701847.4A 2014-01-22 2015-01-21 Mechanismus zur betätigung einer einstellvorrichtung eines bürostuhls und zugehörige einstellungsvorrichtung Active EP3096650B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITMI20140085 2014-01-22
PCT/IB2015/050459 WO2015110964A1 (en) 2014-01-22 2015-01-21 Mechanism for actuating an adjusting device of an office-type chair and an associated adjusting device

Publications (2)

Publication Number Publication Date
EP3096650A1 EP3096650A1 (de) 2016-11-30
EP3096650B1 true EP3096650B1 (de) 2017-12-13

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EP15701847.4A Active EP3096650B1 (de) 2014-01-22 2015-01-21 Mechanismus zur betätigung einer einstellvorrichtung eines bürostuhls und zugehörige einstellungsvorrichtung

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WO (1) WO2015110964A1 (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT201600118868A1 (it) * 2016-11-25 2018-05-25 Oscar Bessega Meccanismo oscillante per sedute

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4856762A (en) * 1986-07-08 1989-08-15 Selzer Guenther Fire retardant gas spring assembly for a passenger seat control
US5899530A (en) * 1995-08-23 1999-05-04 Global Upholstery Company Control mechanism for a chair
IT1396803B1 (it) 2009-05-27 2012-12-14 L I M A S N C Di Beccegato Gino & C Dispositivo di bloccaggio/sbloccaggio tra schienale e sedile o solo sedile o solo schienale, particolarmente per sedie.

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WO2015110964A1 (en) 2015-07-30

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