EP3282901B1 - Oszillationsvorrichtung für einen stuhl - Google Patents

Oszillationsvorrichtung für einen stuhl Download PDF

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Publication number
EP3282901B1
EP3282901B1 EP16724706.3A EP16724706A EP3282901B1 EP 3282901 B1 EP3282901 B1 EP 3282901B1 EP 16724706 A EP16724706 A EP 16724706A EP 3282901 B1 EP3282901 B1 EP 3282901B1
Authority
EP
European Patent Office
Prior art keywords
bars
oscillation
slots
abutment portions
portions
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.)
Not-in-force
Application number
EP16724706.3A
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English (en)
French (fr)
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EP3282901A1 (de
Inventor
Sergio Moreschi
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.)
CO FE MO Industrie Srl
Original Assignee
CO FE MO Industrie Srl
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Application filed by CO FE MO Industrie Srl filed Critical CO FE MO Industrie Srl
Publication of EP3282901A1 publication Critical patent/EP3282901A1/de
Application granted granted Critical
Publication of EP3282901B1 publication Critical patent/EP3282901B1/de
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • A47C3/026—Rocking chairs with seat, or seat and back-rest unit elastically or pivotally mounted in a rigid base frame with central column, e.g. rocking office chairs; Tilting chairs
    • 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

Definitions

  • the present invention relates to an oscillation device for a chair, that is, a mechanism interposed between the seat and the support stem of a chair, preferably an office chair, capable of imparting to the seat a certain forward and backward oscillation movement relative to the stem.
  • oscillation devices comprise a main body having a substantially box-like conformation, engaged on the top of a support stem of the chair.
  • the box-like body defines a member for housing and supporting articulation means of the seat, which are suitable for permitting the oscillation of the seat.
  • WO 2004/056238 A1 , DE 297 00 437 U1 and DE 202 00 298 U1 show examples of known oscillation devices for a chair.
  • some known devices are characterized by an oscillation that is not fluid and not very stable because of the configuration of the springs that control the oscillating motion.
  • the technical task at the basis of the present invention is to provide an oscillation device for a chair which overcomes one or more of the above-mentioned drawbacks of the prior art.
  • a further object of the present invention is to provide an oscillation device for a chair that is capable of improving the efficiency of the oscillation mechanism and the stability of the user while seated.
  • the present invention relates to an oscillation device for a chair according to claim 1.
  • the change in the distance between the two bars enables the forward and backward oscillation of the seat.
  • the present invention avoids complicated adjustment mechanisms, providing a device that is simple to make and practical to use, ensuring a great comfort of the seat by virtue of the presence of elastic means which control the oscillation - being activated according to the external oscillation forces impressed by a seated user who wishes to oscillate forward or backward - by means of an engagement of the second body with the bars, which are movable in a differentiated manner relative to the first body.
  • elastic means which control the oscillation - being activated according to the external oscillation forces impressed by a seated user who wishes to oscillate forward or backward - by means of an engagement of the second body with the bars, which are movable in a differentiated manner relative to the first body.
  • a single elastic reaction system interposed between the two bars one can obtain the desired oscillation both forward and backward.
  • the engagement means are configured in such a way that, following the application of an external oscillation force, the other bar will remain stationary within the respective slots.
  • the distance between the bars is changed in a simple manner.
  • the engagement means are configured to engage the second body with the bars through contact.
  • the engagement means are configured to engage the second body with the bars through contact.
  • the slots extend along a path forming an arc of a circle having its center on the oscillation axis.
  • the first body has two pairs of slots respectively engaged by the two bars.
  • Each pair of slots is formed on opposite walls of the first body and each slot has a first abutment portion and a second abutment portion.
  • the bars are arranged in contact with the respective first abutment portions or in proximity thereto, whereas during an oscillation configuration, in which an external oscillation force with a value other than zero is applied, a first bar remains retained by the first abutment portions of respective first slots in which the first bar is inserted and a second bar moves towards the second abutment portions of second slots in which said second bar is inserted, so as to activate the elastic means.
  • the first abutment portions formed on a same wall of the first body are opposite each other and the second abutment portions formed on a same wall of the first body are opposite each other.
  • the first abutment portions are inner abutment portions and the second abutment portions are external abutment portions and the elastic means are activated in extension.
  • the engagement means comprise ribs integral with the second body and configured to abut against engagement portions of the bars.
  • the ribs follow the oscillatory movement of the second body and hence of the user's seat.
  • the ribs are interposed between the engagement portions of the bars and the first abutment portions are proximal to each other.
  • the ribs extend for an external distance that is less than or equal to the inner distance between the two bars, so that the ribs are insertable between the two bars and by oscillating forward or backward integrally with the second body they can engage one of the two bars positioned in the inner respective abutment portions.
  • the ribs thus work by pushing on the bars, which extend the elastic means according to the value of the external oscillation forces applied by the user.
  • the engagement portions of the bars are end portions of the bars arranged outside the first body and the ribs are preferably arranged on the inner side of the second body.
  • the bars pass through the first body via the pairs of slots of and come out of first body with an end portion that acts as a portion for engaging the ribs.
  • the ribs are formed on the inner surface of the second body facing the first body so as to correctly engage the engagement portions of the bars.
  • the elastic means are subject to a preload (more preferably a traction) in the resting configuration.
  • the elastic means comprise at least one spring having its ends connected to the two bars.
  • the presence of a single elastic system between the two bars which reacts to the forward and backward oscillations enables a non-insignificant structural simplification, which besides improving the stability and fluidity of the oscillation device, conveniently decreases production costs and assembly times.
  • the elastic means are arranged inside the first body.
  • the elastic means remain protected against external agents during the life cycle of the chair.
  • the first abutment portions are external abutment portions and the second abutment portions are inner abutment portions (which could also offset each other in the event of a single slot), the engagement portions of the bars are interposed between the ribs and the elastic means are activated in compression.
  • a first bar will remain retained by the external abutment portions of respective first slots in which the first bar is inserted and the second bar will move away from the external abutment portions of second slots in which the second bar is inserted, so as to activate the elastic means in compression as a result of the nearing between the two bars.
  • the elastic means are preferably under a slight compression preload in the resting configuration (in order to maintain the two bars at a distance).
  • the bars extend along parallel extending directions, which are in turn parallel to the oscillation axis.
  • the oscillation axis lies under the bars.
  • the device comprises an oscillation pin extending along the oscillation axis and more preferably fixed to either the first or the second body.
  • the oscillation pin is rotatably connected to the other of the first body and the second body by interposition of a bush.
  • the device (at least as regards the parts of interest) has a plane of symmetry perpendicular to said oscillation axis.
  • the present invention relates to a chair comprising an oscillation device according to the first aspect of the present invention, a support stem engaged with the first body and a seat engaged with the second body.
  • 1 denotes in its entirety an oscillation device for a chair, hereinafter simply the device 1.
  • the device 1 comprises a first body 2 engageable on a support stem 3 of the chair and a second body 4 suitable for supporting a seat of the chair, not illustrated in the appended figures, and mounted on the first body 2 so as to oscillate about an oscillation axis "X" forward and backward relative to a resting configuration in which the second body 4 is not subject to external oscillation forces.
  • the device 1 comprises two bars 5 arranged so as to pass through respective slots 6 fashioned in opposite walls 2' of the first body 2 and movable within the slots 6.
  • the bars are cylindrical in shape.
  • the device 1 comprises elastic means 7 interposed between the two bars 5 and configured to react to a change in the distance between the two bars 5 relative to the resting configuration.
  • the device 1 further comprises engagement means 8 interposed between the second body 4 and the first body 2 and configured to engage the second body 4 with the bars 5 in such a way that, following the application of an external oscillation force forward or backward on the second body 4, one of the bars 5 is shifted within the respective slots, causing a change in the distance between the two bars 5.
  • the engagement means 8 are are configured in such a way that, following the application of an external oscillation force, the other bar 5 will remain stationary within the respective slots 6.
  • first body 2 and the second body 4 could also be inverted, i.e. the first body 2 could be the one associated with the seat and the second body 4 could be the one associated with the support stem 3.
  • the engagement means 8 are configured to engage the second body 4 with the bars 5 through contact.
  • the slots 6 extend along a path forming an arc of a circle having its center on the oscillation axis "X".
  • the first body 2 has two pairs of slots 6 respectively engaged by the bars 5.
  • Each pair of slots 6 is formed on opposite walls 2' of the first body 2 and each slot 6 has a first abutment portion 6a and a second abutment portion 6b.
  • the bars 5 are arranged in contact with the respective first abutment portions 6a or in proximity thereto, whereas during an oscillation configuration, in which an external oscillation force with a value other than zero is applied, a first bar 5 remains retained by the first abutment portions 6a of respective first slots 6' in which the first bar is inserted 5 and a second bar 5 moves towards the second abutment portions 6b of second slots 6" in which said second bar is inserted 5, so as to activate the elastic means 7.
  • the first abutment portions 6a formed on a same wall 2' of the first body 2 are opposite each other and the second abutment portions 6b formed on a same wall 2' of the first body 2 are opposite each other.
  • a single slot 6 could be provided on each opposite wall 2', the wall being endowed with end stop elements defining the first abutment portions 6a of the slots 6.
  • the first abutment portions 6a are inner abutment portions (i.e. proximal to each other) of the slots 6 and the second abutment portions 6b are external abutment portions (i.e. reciprocally distal) of the slots 6 and the elastic means are activated in extension.
  • the engagement means 8 comprise ribs 8a integral with the second body 4 and configured to abut against engagement portions 5a of the bars 5.
  • ribs 8a per wall 2' of the first body 2 and they extend parallel.
  • the ribs 8a are preferably interposed between the engagement portions 5a of the bars 5 and the first abutment portions 6a are proximal to each other.
  • the engagement portions 5a of the bars 5 are end portions of the bars 5 arranged outside the first body 2 and the ribs 8a are preferably arranged on the inner side of the second body 4.
  • figure 3a illustrates the resting configuration in which the bars 5', 5" are arranged in contact with the respective first abutment portions 6a and the ribs 8a typically in contact with or in proximity to the engagement portions of the bars.
  • the first abutment portions are external abutment portions and the second abutment portions are inner abutment portions (i.e. proximal to each other), which could also offset each other in the event of a single slot, and the elastic means are activated in compression.
  • the ribs are arranged outside the engagement portions of the bars in such a way as to push, alternatively, one of the two bars towards the other, which remains stationary against the external abutment portion (or any end stop integral with the first body), since the respective proximal rib is detached from it and moves away.
  • the elastic means 7 preferably comprise at least one spring 7a endowed with a traction preload and having its ends connected to the two bars 5.
  • the spring 7a could be replaced by a piston (hydraulic or pneumatic) or by an elastically deformable passive element.
  • the elastic means 7 are arranged inside the first body 2.
  • the bars 5 extend along parallel extending directions "Y", which are in turn parallel to the oscillation axis "X".
  • the oscillation axis "X" lies under the bars 5.
  • the device 1 comprises an oscillation pin 9 extending along the oscillation axis "X" and fixed to either the first body 2 or the second body 4.
  • the oscillation pin 9 is rotatably connected to the other of the first body 2 and the second body 4 by interposition of a bush 10.
  • the oscillation pin 9 is screwed into the first body 2.
  • the present invention achieves the set objectives by providing the user with an oscillation device applicable to any chair having a support stem and a seat (to which, a backrest can be advantageously applied, rigidly connected to the seat or articulated relative to the seat), thus overcoming the drawbacks of the prior art.

Landscapes

  • Chairs Characterized By Structure (AREA)
  • Percussion Or Vibration Massage (AREA)
  • Chair Legs, Seat Parts, And Backrests (AREA)

Claims (15)

  1. Oszillationsvorrichtung (1) für einen Stuhl, umfassend:
    - einen ersten Körper (2), der auf einem Halterungsschaft (3) des Stuhls in Eingriff gelangen kann;
    - einen zweiten Körper (4), der geeignet ist, um einen Sitz des Stuhls zu stützen und der auf dem ersten Körper (2) montiert ist, sodass er um eine Schwenkachse (X) im Vergleich zu einer Ruhekonfiguration, in der der zweite Körper (4) keinen externen Schwingungskräften unterliegt, vor- und zurückschwingt;
    - zwei Stäbe (5), die durchführend durch jeweilige Schlitze (6), die in gegenständigen Wänden (2') des ersten Körpers (2) ausgebildet sind, angeordnet sind;
    - Eingriffsmittel (8), die zwischen dem zweiten Körper (4) und dem ersten Körper (2) eingesetzt sind, dadurch gekennzeichnet, dass
    - die zwei Stäbe (5) in den Schlitzen (6) bewegbar sind;
    - die Oszillationsvorrichtung elastische Mittel (7) umfasst, die zwischen den zwei Stäben (5) eingesetzt und ausgelegt sind, um auf eine Änderung des Abstands zwischen den zwei Stäben (5) im Vergleich zur Ruhekonfiguration zu reagieren, und dadurch, dass die Eingriffsmittel ausgelegt sind, um den zweiten Körper (4) mit den Stäben (5) zu greifen, sodass einer der Stäbe (5) nach der Anwendung einer externen Schwingungskraft in Vorwärts- oder Rückwärtsrichtung auf den zweiten Körper (4) in den jeweiligen Schlitzen (6) verschoben wird und eine Änderung des Abstands zwischen den zwei Stäben (5) bewirkt.
  2. Vorrichtung (1) nach Anspruch 1, wobei die Eingriffsmittel (8) so ausgelegt sind, dass der andere Stab (5) nach der Anwendung der externen Schwingungskraft stationär in den jeweiligen Schlitzen (6) bleibt.
  3. Vorrichtung (1) nach Anspruch 1 oder 2, wobei die Eingriffsmittel (8) ausgelegt sind, um den zweiten Körper (4) mit den Stäben (5) durch einen Kontakt zu greifen.
  4. Vorrichtung (1) nach einem oder mehreren der vorhergehenden Ansprüche, wobei der erste Körper (2) zwei Paar Schlitze (6) aufweist, mit denen jeweils die zwei Stäbe (5) in Eingriff gelangen, wobei ein jedes Paar Schlitze (6) an gegenständigen Wänden (2') des ersten Körpers (2) ausgebildet ist, wobei ein jeder der Schlitze (6) einen ersten Anschlagsabschnitt (6a) und einen zweiten Anschlagsabschnitt (6b) aufweist.
  5. Vorrichtung (1) nach Anspruch 4, wobei die ersten Anschlagsabschnitte (6a), die an einer selben Wand (2') des ersten Körpers (2) ausgebildet sind, gegenständig zueinander angeordnet sind und die zweiten Anschlagsabschnitte (6b), die an einer selben Wand (2') des ersten Körpers (2) ausgebildet sind, gegenständig zueinander angeordnet sind.
  6. Vorrichtung (1) nach Anspruch 4 oder 5, wobei die Stäbe (5) während der Ruhekonfiguration in Kontakt mit den jeweiligen ersten Anschlagsabschnitten (6a) oder nahe an diesen angeordnet sind, und auf der anderen Seite ein erster Stab (5') während einer Schwenkkonfiguration, in der eine externe Schwingungskraft mit einem Wert, der nicht gleich null ist, angewandt wird, von den ersten Anschlagsabschnitten (6a) der jeweiligen ersten Schlitze (6'), in die der erste Stab (5') eingefügt ist, gehalten bleibt, und ein zweiter Stab (5") sich hinführend zu den zweiten Anschlagsabschnitten (6b) zweiter Schlitze (6") bewegt, in die der zweite Stab (5") eingefügt ist, sodass die elastischen Mittel (7) aktiviert werden.
  7. Vorrichtung (1) nach Anspruch 4 oder 5 oder 6, wobei die ersten Anschlagsabschnitte (6a) innenseitige Anschlagsabschnitte sind und die zweiten Anschlagsabschnitte (6b) außenseitige Anschlagsabschnitte sind und wobei die elastischen Mittel (7) in Ausdehnung aktiviert werden.
  8. Vorrichtung (1) nach einem oder mehreren der vorhergehenden Ansprüche, wobei die Eingriffsmittel (8) Rippen (8a) umfassen, die fest mit dem zweiten Körper (4) verbunden und ausgelegt sind, um gegen Eingriffsabschnitte (5a) der Stäbe (5) anzuschlagen.
  9. Vorrichtung (1) nach Anspruch 8, wobei die Eingriffsabschnitte (5a) der Stäbe (5) Endabschnitte der Stäbe (5) sind, die außerhalb des ersten Körpers (2) angeordnet sind, und wobei die Rippen (8a) an der Innenseite des zweiten Körpers (4) angeordnet sind.
  10. Vorrichtung (1) nach Anspruch 8, wenn dieser von Anspruch 7 abhängt, wobei die Rippen (8a) zwischen den Eingriffsabschnitten (5a) der Stäbe (5', 5") eingesetzt sind, und wobei die ersten Eingriffsabschnitte (6a) proximal zueinander angeordnet sind.
  11. Vorrichtung (1) nach einem oder mehreren der vorhergehenden Ansprüche, wobei die elastischen Mittel (7) mindestens eine Feder (7a) umfassen, die mit einer Vorspannung versehen ist und deren Enden mit den zwei Stäben (5) verbunden sind.
  12. Vorrichtung (1) nach einem oder mehreren der vorhergehenden Ansprüche, wobei die elastischen Mittel (7) im ersten Körper (2) angeordnet sind.
  13. Vorrichtung (1) nach einem oder mehreren der vorhergehenden Ansprüche, wobei sich die Schlitze (6) entlang eines Wegs erstrecken, der einen Kreisbogen bildet, dessen Mitte auf der Schwingungsachse (X) angeordnet ist, in dem sich die Stäbe (5) entlang sich parallel erstreckender Richtungen (Y) erstrecken, die wiederum parallel zur Schwingungsachse (X) angeordnet sind, wobei die Schwingungsachse (X) unter den Stäben (5) liegt.
  14. Vorrichtung (1) nach einem oder mehreren der vorhergehenden Ansprüche, wobei die Vorrichtung zudem einen Schwenkzapfen (9) umfasst, der sich entlang der Schwingungsachse (X) erstreckt und an entweder am ersten Körper (2) oder am zweiten Körper (4) angebracht ist, wobei der Schwenkzapfen (9) drehbar mit dem anderen Körper, jeweils entweder dem ersten Körper (2) oder dem zweiten Körper (4) durch Einsetzen einer Buchse (10) verbunden ist.
  15. Stuhl, umfassend eine Vorrichtung (1) nach einem oder mehreren der vorhergehenden Ansprüche, wobei der Halterungsschaft (3) mit dem ersten Körper (2) im Eingriff ist und der Sitz mit dem zweiten Körper (4) im Eingriff ist.
EP16724706.3A 2015-04-15 2016-04-15 Oszillationsvorrichtung für einen stuhl Not-in-force EP3282901B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITMI2015A000538A ITMI20150538A1 (it) 2015-04-15 2015-04-15 Dispositivo di oscillazione per una sedia
PCT/IB2016/052170 WO2016166723A1 (en) 2015-04-15 2016-04-15 Oscillation device or a chair

Publications (2)

Publication Number Publication Date
EP3282901A1 EP3282901A1 (de) 2018-02-21
EP3282901B1 true EP3282901B1 (de) 2018-11-28

Family

ID=53502730

Family Applications (1)

Application Number Title Priority Date Filing Date
EP16724706.3A Not-in-force EP3282901B1 (de) 2015-04-15 2016-04-15 Oszillationsvorrichtung für einen stuhl

Country Status (3)

Country Link
EP (1) EP3282901B1 (de)
IT (1) ITMI20150538A1 (de)
WO (1) WO2016166723A1 (de)

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29700437U1 (de) * 1996-07-23 1997-11-27 Becker Kg Fritz Bewegungsstuhl
DE20200298U1 (de) * 2002-01-10 2002-03-21 Becker Kg Fritz Bewegungsstuhl
NO319640B1 (no) * 2002-12-20 2005-09-05 Varier Furniture As Bevegelig ledd med fjaermotstand til en sitteinnretning

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
WO2016166723A1 (en) 2016-10-20
EP3282901A1 (de) 2018-02-21
ITMI20150538A1 (it) 2016-10-15

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