WO2014143841A1 - Ensemble bras réglable pour une chaise - Google Patents

Ensemble bras réglable pour une chaise Download PDF

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Publication number
WO2014143841A1
WO2014143841A1 PCT/US2014/027985 US2014027985W WO2014143841A1 WO 2014143841 A1 WO2014143841 A1 WO 2014143841A1 US 2014027985 W US2014027985 W US 2014027985W WO 2014143841 A1 WO2014143841 A1 WO 2014143841A1
Authority
WO
WIPO (PCT)
Prior art keywords
slide plate
assembly according
armrest assembly
adjustable armrest
cam
Prior art date
Application number
PCT/US2014/027985
Other languages
English (en)
Inventor
Jason Hall
Jon Swingle
Timothy SCHOLMA
Original Assignee
Haworth, Inc.
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 Haworth, Inc. filed Critical Haworth, Inc.
Publication of WO2014143841A1 publication Critical patent/WO2014143841A1/fr

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
    • A47C1/022—Reclining or easy chairs having independently-adjustable supporting parts
    • A47C1/03—Reclining or easy chairs having independently-adjustable supporting parts the parts being arm-rests
    • A47C1/0303—Reclining or easy chairs having independently-adjustable supporting parts the parts being arm-rests adjustable rectilinearly in vertical direction
    • A47C1/0305—Reclining or easy chairs having independently-adjustable supporting parts the parts being arm-rests adjustable rectilinearly in vertical direction by 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
    • A47C1/022—Reclining or easy chairs having independently-adjustable supporting parts
    • A47C1/03—Reclining or easy chairs having independently-adjustable supporting parts the parts being arm-rests
    • A47C1/0307—Reclining or easy chairs having independently-adjustable supporting parts the parts being arm-rests adjustable rectilinearly in horizontal direction
    • 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
    • A47C1/03—Reclining or easy chairs having independently-adjustable supporting parts the parts being arm-rests
    • A47C1/0308—Reclining or easy chairs having independently-adjustable supporting parts the parts being arm-rests adjustable by rotation

Definitions

  • the present invention relates to an arm assembly for an office chair, and more particularly to an arm assembly with an arm cap that is readily adjustable in elevation, longitudinal, transverse, and angular positions.
  • Conventional office chairs are designed to provide significant levels of comfort and adjustability. Not all office chairs include arm assemblies; however, for those that do, arm assemblies are mounted on opposite sides of the seat so as to support an occupant's arms and specifically, the elbows and forearms of the occupant. Such arm assemblies project upwardly and include an upward facing armrest pads thereon which define a support surface to accommodate the occupant's arms. The arm assemblies or portions thereof, may be movable in various directions to provide comfort to users of various sizes for various applications.
  • the present invention provides an adjustable armrest assembly for a chair.
  • the armrest assembly includes a support column and first and second slide plates.
  • the first slide plate is slidably mounted to the support column and is configured to move along a first generally horizontal path, which may extend in a longitudinal direction.
  • the first slide plate may include a first adjustment mechanism.
  • the second slide plate is slidably mounted to the first slide plate and is configured to be slidable along a second generally horizontal path oriented transverse to the first path. Additionally, the second slide plate is configured to be angularly pivotable in the substantially horizontal plane.
  • the second slide plate may also include a second adjustment mechanism.
  • the armrest assembly further includes an armrest mounted to the second slide plate for supporting an arm of a user, and a locking mechanism.
  • the locking mechanism may be actuated to selectively and simultaneously disengage both the first and second adjustment mechanisms for movement of both the first and second slide plates and engageable to releasably fix the selected longitudinal, transverse, and angular position of the armrest relative to the support column.
  • FIG. 1 is an exploded view of an arm assembly according to an embodiment of the invention
  • Fig. 2 is a side cross-sectional view of an armrest assembly of the arm assembly
  • Fig. 3 is an exploded view of a fore-aft plate included in the armrest assembly
  • Fig. 4 is a top schematic view of the fore-aft plate, illustrating a locked position
  • Fig. 5 is a top schematic view of the fore-aft plate, illustrating an unlocked position
  • Fig. 6 is an exploded view of a transverse plate included in the armrest assembly
  • Fig. 7 is a top schematic view of the transverse plate, illustrating an locked position
  • Fig. 8 is a top schematic view of the transverse plate, illustrating an unlocked position
  • Fig. 9 is a side cross-sectional view of a support post unit of the arm assembly
  • Fig. 10 is a side schematic view of a height adjustment actuator for the support post unit, illustrating a locked position; and [0016] Fig. 11 is a side schematic view of the height adjustment actuator, illustrating an unlocked position.
  • an arm assembly for an office chair is shown in the figures and generally designated 10.
  • the invention relates to an office chair which includes various inventive features therein to improve the overall comfort and adjustability of the chair. More particularly, this chair includes improved height-adjustable arm assemblies 10 which are readily adjustable to the different physical characteristics and comfort preferences of the chair's occupant.
  • the arm assemblies 10 are formed substantially identical to one another except that they are formed as mirror-images for mounting to the respective left or right side of the chair. The following description is therefore applicable to both left and right chair arm assemblies 10. In one embodiment, these arm assemblies 10 mount directly to the support structure of the chair so as to be movable therewith during reclining of the chair.
  • FIG. 1 is an exploded view of the arm assembly 10 which generally comprises a support post unit 12 and an armrest assembly 14 and FIG. 2 is a cross-sectional view of the armrest assembly 14.
  • the support post unit 12 includes an upwardly-projecting support post 16 which is rigidly connected to the support structure of the chair and defines an upward- opening hollow post interior 18 (FIG. 9).
  • the hollow post interior 18 is adapted to receive the armrest assembly 14 in telescoping relation therewith.
  • the armrest assembly 14 includes a downwardly-projecting support column 20 which is slidably received within the post interior 18 and is vertically movable to a selected elevation.
  • the armrest column 20 includes a latching mechanism 22 disposed within the support column 20 and adapted to engage the support post 16.
  • the armrest assembly 14 further includes an arm cap 24 that defines an upward facing support surface 26 for supporting the forearms of the occupant.
  • the arm cap 24 is movably connected to the support column 20 by an interconnected arrangement of stacked slide plates. These slide plates include a fore-aft plate 40 and a transverse plate 42, which together permit the arm cap 24 to move in multiple adjustment directions.
  • the fore-aft plate 40 permits adjustment of the arm cap 24 generally in the direction of reference arrow X
  • the transverse plate 42 permits translation in the direction of reference arrow Y and angular displacement in the horizontal plane in the direction of reference arrow Z.
  • This multi-layer arrangement of plates 40, 42 allows a high degree of adjustability for the arm cap 24 to accommodate the physical characteristics and comfort requirements of an occupant.
  • the fore-aft plate 40 is slidably mounted to the support column 20 by a plate retainer 44.
  • the plate retainer 44 includes at least one fastener 46 rigidly affixed to and downwardly depending from a lower surface of the plate retainer 44. In the illustrated embodiment, two spaced apart fasteners 46 are shown.
  • the fasteners 46 each include a head 48 which is rigidly retained by the support column 20.
  • the fore-aft plate 40 includes a central channel 50 which defines a path along which the fore-aft plate 40 is movable.
  • the plate retainer 44 is positioned atop the fore-aft plate 40 and the fasteners 46 are inserted into the plate retainer 44, and when so positioned, the central channel 50 receives the fasteners 46 therethrough. Therefore, the fasteners 46 and plate retainer 44 are immovably mounted to the support column 20, while the fore-aft plate 40 is capable of longitudinal sliding as guided by the central channel 50.
  • the fore-aft plate 40 also includes a first adjustment mechanism for selectively controlling longitudinal movement thereto.
  • the first adjustment mechanism includes a pinion engaging a pair of opposing sidewalls, a cam, and the plate retainer. More specifically, the plate retainer 44 is fitted between a pair of opposing sidewalls - a stationary sidewall 52 and a pivoting sidewall 54.
  • the sidewalls 52, 54 are disposed on the fore-aft plate 40 and are positioned along the length of the central channel 50. Further, the sidewalls 52, 54 each include a toothed gear rack. However, one of the sidewalls 52 or 54 may optionally omit the toothed gear rack.
  • a pinion 56 is rotatably mounted to the plate retainer 44 and is positioned between the sidewalls 52, 54 such that the pinion 56 and sidewalls 52, 54 matingly engage.
  • the pivoting sidewall 54 is pivotable between a locked position A and an unlocked position B, as illustrated in FIGS. 4 and 5 respectively.
  • a first end of the pivoting sidewall 54 is rotatably affixed by a fastener 58 to the fore-aft plate 40.
  • An opposite end of the pivoting sidewall 54 includes an upstanding pin or cam follower 60 configured to ride in a guide slot 62 formed in a secondary cam 64.
  • the secondary cam 64 is rotatably affixed at an opposite end thereof to the fore-aft plate 40 by a fastener 66.
  • Pivoting the secondary cam 64 about the fastener 66 causes the cam follower 60 to move along the guide slot 62, thereby governing the pivotal movement of the pivoting sidewall 54 between the locked and unlocked positions A, B.
  • the pivoting sidewall 54 and stationary sidewall 52 are configured and aligned such that that pinion 56 located therebetween is unable to rotate, thereby locking the fore-aft plate 40 in position.
  • the unlocked position B shown in FIG. 5 the pivoting sidewall 54 is pivoted away from the stationary sidewall 52, thereby allowing rotation of the pinion 56 and fore-aft adjustment of the fore-aft plate 40.
  • the secondary cam 64 may be biased, such as by a spring 68, to the locked position A.
  • the transverse plate 42 is interconnected to the fore-aft plate 40 so as to be translatable in the transverse direction Y for adjusting the distance between the arm caps 24, as well as to be pivotable within the horizontal plane for adjusting the angle of the arm caps 24.
  • the transverse plate 42 is slidably mounted to the fore-aft plate 40 by a transverse plate retainer 70 which is affixed to the fore-aft plate 40 by fasteners 72 engaged with upstanding posts 74 (FIG. 3) formed on the fore-aft plate 40.
  • the transverse plate 42 includes a pair of channels 76 and 78 that are disposed at substantially opposite distal ends of the transverse plate 42.
  • the channels 76 and 78 are oriented in the transverse direction and define a path along which the transverse plate 42 is movable.
  • the transverse plate retainer 70 is positioned atop the transverse plate 42, and both are then positioned atop the fore-aft plate 40.
  • the posts 74 extend up through the channels 76 and 78 and the fasteners 72 are then inserted into the posts 74 to retain the transverse plate retainer 70 to the fore-aft plate 40. Therefore, the posts 74 and transverse plate retainer 70 are immovably mounted to the fore-aft plate 40, while the transverse plate 42 is capable of translation as guided by the channels 76 and 78.
  • the transverse plate 42 also includes a second adjustment mechanism for selectively controlling the movement thereof.
  • the second adjustment mechanism includes at least one pinion engaging at least one pair of opposing walls, a cam, a plurality of linkages, and the transverse plate retainer.
  • the transverse plate retainer 70 includes a pair of spaced pinions 80 and 82 rotatably mounted thereto.
  • the first pinion 80 is positioned between a pivotable first lock bar 84 and a first gear rack 86;
  • the second pinion 82 is positioned between a pivotable second lock bar 88 and a second gear rack 90.
  • the first lock bar 84 and first gear rack 86 are disposed on the transverse plate 42 and are positioned parallel to the length of the channel 76.
  • the second lock bar 88 and second gear rack 90 are disposed at an opposite end of the transverse plate 42 and are positioned parallel to the length of the channel 78. Accordingly, the first pinion 80 matingly engages the first lock bar 84 and first gear rack 86, and the second pinion 82 matingly engages the second lock bar 88 and second gear rack 90.
  • the lock bars 84, 88 may include a resilient material, attached to the surface engaging the pinions 80, 82, to increase friction between the lock bars 84, 88 and the respective pinions 80, 82 when the lock bars 84, 88 are in the locked position and prevent movement of the pinions 80, 82 with respect to the lock bars 84, 88.
  • the lock bars 84, 88 may also include a toothed gear rack and/or the gear racks 86, 90 may be lock bars with generally smooth surfaces that may be formed from a resilient material.
  • the transverse plate retainer 70 also enables angular displacement, within the substantially horizontal plane, of the arm cap 24.
  • the distance between the two pinions 80, 82 must be adjustable.
  • the first pinion 80 is affixed to a carrier 106 that is slidably mounted to the transverse plate retainer 70.
  • the carrier 106 is adapted to be displaceable in the longitudinal direction.
  • the carrier 106 may include a spring 108 to bias the first pinion 80 away from the second pinion 82.
  • the first and second pinions 80, 82 are positioned at their closest relative position; as the traverse plate 42 rotates in either direction about the second pinion 82, the spring 108 pushes the first pinion 80 away from the second pinion 82 to maintain engagement with the first gear rack 86.
  • the lock bars 84, 88 are pivotable between a locked position C and an unlocked position D, as illustrated in FIGS. 7 and 8, respectively.
  • a first end of the first lock bar 84 is rotatably affixed by a fastener 92 to the transverse plate 42 and an opposite end of the first lock bar 84 is pivotally attached to a first linkage 94.
  • the first linkage 94 is pivotally attached at one end to the first lock bar 84, and an opposite end thereof is pivotally attached to a primary cam 96.
  • the primary cam 96 is pivotally mounted to the transverse plate 42 by a fastener 98.
  • the primary cam 96, first linkage 94, and first lock bar 84 are configured such that rotating the primary cam 96 effects pivoting of the first lock bar 84 about its fastener 92 and away from the first gear rack 86.
  • the second lock bar 88 is pivoted in the same manner, though in the opposite orientation.
  • the second lock bar 88 is rotatably mounted by a fastener 100 and pivotally connected to a second linkage 102, which is pivotally connected to the primary cam 96.
  • first and second lock bars 84, 88 pivot between the locked and unlocked positions C, D.
  • first lock bar 84 and first gear rack 86 are configured and matingly aligned such that that pinion 80 located therebetween is unable to rotate, thereby locking the transverse plate 42 in position.
  • the smooth, non-toothed, surfaces of the lock bars 84, 88 enable locking of the transverse plate 42 at any desired transverse position.
  • the transverse plate 42 can be locked without being limited to discrete transverse positions.
  • the first lock bar 84 is pivoted away from the first gear rack 86, thereby allowing rotation of the pinion 80 and transverse and angular adjustment of the transverse plate 42.
  • the second lock bar 88, second gear rack 90, and pinion 82 are moved between the locked and unlocked positions C, D in the same manner.
  • the primary cam 96 may be biased, such as by a spring 104, to the locked position C.
  • the stacked plate arrangement described herein enables substantially unconstrained positional placement of the arm cap 24.
  • the cooperation of the fore-aft plate 40 and the transverse plate 42 permits the arm cap 24 to be adjusted to virtually any desired combination of fore-aft, transverse, and angular positions, thereby providing a highly flexible, repositionable arm cap 24.
  • the arm cap 24 and transverse plate 42 enclose the components mounted to the transverse plate 42.
  • the arm cap 24 is affixed to the transverse plate 42 by any suitable means, such as mechanical fasteners.
  • the arm cap 24 further includes a locking mechanism 110 which is readily lockable through any of the numerous combinations of longitudinal, transverse, and angular positions permitted by the stacked plate arrangement.
  • the locking mechanism 110 includes an actuator 112 which may be thought of as having two portions - an actuator button 114 and an actuator linkage 116.
  • the actuator 112 is disposed on the transverse plate 42, and the actuator button 114 extends outward therefrom through a recess 118 in a sidewall of the transverse plate 42.
  • the actuator 112 is pivotally mounted to the transverse plate 42 by a fastener 120 positioned at a distal end of the actuator linkage 116.
  • the actuator 112 also includes a third linkage 122 that is pivotally mounted on both ends thereof. One end of the third linkage 122 is pivotally affixed to the actuator 112, while the opposite end is pivotally affixed to the primary cam 96.
  • the locking mechanism 110 also controls locking of the fore-aft plate 40.
  • the locking mechanism 110 further includes a transfer link 124.
  • the transfer link 124 is positioned between the fore-aft and transfer plates 40, 42 and operatively couples the primary and secondary cams 96, 64.
  • the transfer link 124 is pivotally affixed at one end thereof to the secondary cam 64.
  • An opposite end of the transfer link 124 is joined to a pin 126 that extends down from the primary cam 96 through an opening (not shown) in the transverse plate 42.
  • the pin 126 is positioned within a channel 128 formed in the primary cam 96.
  • the armrest assembly 14 is normally biased to its locked position.
  • the arm cap 24 may be readily adjusted with respect to its longitudinal, traverse, and angular position.
  • a user may actuate the actuator 112 by inwardly depressing the actuator button 114, thereby setting off a chain of movements. Referring to the orientation as viewed in FIGS. 7 and 8, depressing the actuator button 114 pivots the actuator 112 inward, or down, about its fastener 120.
  • the third linkage 122 being mounted to the actuator 112, is moved inward/down as well, which causes the primary cam 96 to rotate clockwise about its fastener 98. Rotating the primary cam 96 effects the movement of the three components affixed thereto: the first and second lock bars 84, 88, and the pin 126.
  • Moving the transfer link 124 to the right causes the secondary cam 64 to pivot to the right about is fastener 66, the cam follower 60 to move up along the guide slot 62, and the pivoting sidewall 54 to pivot up about its fastener 58. This pulls the end opposite the fastener 88 up and away from the stationary sidewall 52.
  • the pinion 56 is then free to rotate and allows the geared stationary sidewall 52 to translate thereupon, allowing the fore- aft plate 40 to slide relative to the plate retainer 44 and support column 20. Accordingly, the first adjustment mechanism is moved from the locked to the unlocked position A, B.
  • the user is able to selectively move the arm cap 24 in longitudinal, transverse, and angular directions, all substantially within the horizontal plane.
  • the user can release the actuator button 114, causing the opposite motions as described above and returning the fore-aft and transverse plates 40, 42 to their locked positions A, C.
  • the entire arm assembly 10 may be selectively adjustable in the vertical direction.
  • the support post unit 12 includes the upwardly open support post which receives the support column 20 in telescoping relation to permit vertical displacement of the armrest assembly 14.
  • the support post unit 12 also includes a height adjustment actuator 130 to maintain the armrest assembly 14 at a selected elevation.
  • the height adjustment actuator 130 includes the latching mechanism 22, a cam lock 132, and a toothed gear rack 134, all of which are enclosed within the post interior 18.
  • the latching mechanism 22 includes an unlock button 136.
  • the latching mechanism 22 is slidably retained within the support column 20 while the cam lock 132 is pivotally mounted to the support column 20.
  • the unlock button 136 extends out from the support column 20 so as to be accessible to a user.
  • the cam lock 132 is positioned between the latching mechanism 22 and the toothed gear rack 134. In a locked position, illustrated in FIGS 9 and 10, the cam lock 132 engages the toothed gear rack 134. Additionally, the cam lock 132 may be biased, such as by a spring 138, to the locked position. To unlock the height adjustment actuator 130, a user may pull the unlock button 136 upward. This moves the entire latching mechanism 22 up, and a tab 140 formed on the latching mechanism 22 pivots the cam lock 132 out of engagement with the toothed gear rack 134. The unlocked position is illustrated in FIG. 11. Once the desired vertical position is selected, the unlock button 136 may be released and the height adjustment actuator 130 returns to the locked position.
  • Patent No. 7,815,259 filed April 2, 2009, entitled Arm Assembly for a Chair
  • U.S. Patent No. 6,908,158 filed Jan. 2, 2003, entitled Lateral Motion Chair Arm Mechanism for Chair Arm. Both of these patents are owned by Haworth, Inc. and the disclosure of these patents is incorporated herein by reference in their entirety.

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

Abstract

L'invention concerne un ensemble accoudoir réglable pour une chaise, qui comprend une colonne de support ainsi qu'une première et une deuxième plaque coulissantes. La première plaque coulissante est montée coulissante sur la colonne de support et est conçue pour se déplacer le long d'un premier trajet longitudinal. La deuxième plaque coulissante est montée coulissante sur la première plaque coulissante et est conçue pour pouvoir coulisser le long d'un deuxième trajet longitudinal orienté de manière transversale par rapport au premier trajet longitudinal et pour pouvoir pivoter de manière angulaire dans un plan sensiblement horizontal. Les première et deuxième plaques coulissantes comprennent respectivement un premier et un deuxième mécanisme de réglage. L'ensemble accoudoir comprend également un mécanisme de verrouillage qui peut être dégagé pour dégager sélectivement les premier et deuxième mécanismes de réglage pour permettre aux première et deuxième plaques coulissantes de se déplacer. Le mécanisme de verrouillage peut être mis en prise pour maintenir de manière libérable la position sélectionnée longitudinale, transversale, et angulaire de l'accoudoir par rapport à la colonne de support.
PCT/US2014/027985 2013-03-15 2014-03-14 Ensemble bras réglable pour une chaise WO2014143841A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US201361786739P 2013-03-15 2013-03-15
US61/786,739 2013-03-15

Publications (1)

Publication Number Publication Date
WO2014143841A1 true WO2014143841A1 (fr) 2014-09-18

Family

ID=50440880

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2014/027985 WO2014143841A1 (fr) 2013-03-15 2014-03-14 Ensemble bras réglable pour une chaise

Country Status (1)

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WO (1) WO2014143841A1 (fr)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE20304136U1 (de) * 2003-03-13 2004-04-15 Froli Kunststoffwerk Heinrich Fromme Ohg Armstütze, insbesondere für Büro- und Drehstühle
US6908158B2 (en) 2003-01-02 2005-06-21 Haworth, Inc. Lateral motion chair arm mechanism for chair arm
US20080084103A1 (en) * 2005-04-13 2008-04-10 Bock 1 Gmbh & Co. Kg Armrest, in Particular for an Office Chair
US20090302661A1 (en) * 2008-06-06 2009-12-10 Knoll, Inc. Armrest Apparatus
US7815259B2 (en) 2005-03-01 2010-10-19 Haworth, Inc. Arm assembly for a chair
US20120175934A1 (en) * 2011-01-10 2012-07-12 Bock 1 Gmbh & Co. Kg Armrest, in particular for an office chair

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6908158B2 (en) 2003-01-02 2005-06-21 Haworth, Inc. Lateral motion chair arm mechanism for chair arm
DE20304136U1 (de) * 2003-03-13 2004-04-15 Froli Kunststoffwerk Heinrich Fromme Ohg Armstütze, insbesondere für Büro- und Drehstühle
US7815259B2 (en) 2005-03-01 2010-10-19 Haworth, Inc. Arm assembly for a chair
US20080084103A1 (en) * 2005-04-13 2008-04-10 Bock 1 Gmbh & Co. Kg Armrest, in Particular for an Office Chair
US20090302661A1 (en) * 2008-06-06 2009-12-10 Knoll, Inc. Armrest Apparatus
US20120175934A1 (en) * 2011-01-10 2012-07-12 Bock 1 Gmbh & Co. Kg Armrest, in particular for an office chair

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