EP3528666A1 - Backrest device - Google Patents
Backrest deviceInfo
- Publication number
- EP3528666A1 EP3528666A1 EP17784296.0A EP17784296A EP3528666A1 EP 3528666 A1 EP3528666 A1 EP 3528666A1 EP 17784296 A EP17784296 A EP 17784296A EP 3528666 A1 EP3528666 A1 EP 3528666A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- backrest
- actuator
- support
- support arm
- arm
- 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.)
- Granted
Links
- 230000000903 blocking effect Effects 0.000 claims abstract description 19
- 239000013013 elastic material Substances 0.000 claims abstract description 4
- 238000003780 insertion Methods 0.000 claims description 51
- 230000037431 insertion Effects 0.000 claims description 51
- 238000010276 construction Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 239000004753 textile Substances 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47C—CHAIRS; SOFAS; BEDS
- A47C7/00—Parts, details, or accessories of chairs or stools
- A47C7/36—Support for the head or the back
- A47C7/40—Support for the head or the back for the back
- A47C7/402—Support for the head or the back for the back adjustable in height
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47C—CHAIRS; SOFAS; BEDS
- A47C7/00—Parts, details, or accessories of chairs or stools
- A47C7/36—Support for the head or the back
- A47C7/40—Support for the head or the back for the back
- A47C7/44—Support for the head or the back for the back with elastically-mounted back-rest or backrest-seat unit in the base frame
Definitions
- the invention relates to a backrest device according to the preamble of independent claim 1.
- backrest devices can be provided adjustable in height in a chair and in particular an office chair.
- backrests which are intended to allow ergonomic sitting.
- the backrests are connected via a two arms having backrest support with a chair base or a seat.
- the backrest support can on the one hand leave a resilient movement of the backrest to the rear and on the other hand a resilient movement in a lateral direction or a twisting movement to a certain extent.
- backrests are often height adjustable.
- EP 2 721 962 A1 describes a backrest in which a base plate of a backrest is height-adjustable mounted on two webs of a backrest carrier connected to a seat.
- a dorsokinetic bearing is arranged, which allows rotational movements.
- the webs are each equipped with a series of locking structures.
- a locking lever mounted via springs button and a cover are mounted.
- the locking lever is designed to be in the Intervene locking structures of the webs.
- a disadvantage of means for adjusting the height of backrests such as the device described above is that typically comparatively many components are present, which must be assembled relatively complicated. This makes the production of chair backs or chairs relatively expensive and expensive. In addition, such are also relatively difficult to maintain, for example, if individual components must be replaced. Next, such known devices are usually relatively bulky and voluminous, which is often undesirable, among other things, for aesthetic reasons.
- Object of the following invention is therefore to propose a backrest device that can be relatively easily installed and maintained and takes up the least possible space.
- a backrest device for a chair and in particular an office chair comprises a backrest support with a support arm, a backrest mounted on the support arm and an adjustable between a blocking position and a movement position actuator.
- the support arm of the backrest carrier is equipped with a latching row.
- the actuator is connected to the backrest and has an engaging piece. In the blocking position, the engaging piece of the actuator engages in the latching row of the support arm the backrest support, so that a movement of the backrest along the support arm of the backrest support is locked. In the movement position, the engaging piece of the actuator is out of engagement with the locking row of the support arm of the backrest support, so that the backrest is typically movable almost vertically along the support arm of the backrest support.
- the actuator is in particular made in one piece from an elastic material, wherein it is elastically deformed in the movement position by a typically manually applied force, so that the engaging piece of the actuator is moved or pulled from the detent row of the support arm of the backrest support.
- the detent row may be a row of detent elements, such as a row of teeth, for example, a row of teeth.
- the latching elements or the teeth can be formed and dimensioned congruent to the engaging piece of the actuator.
- the backrest can therefore be moved substantially vertically downwards and upwards along the support arm.
- the term "quasi-vertical” may refer to an orientation of the backrest, but in addition to an exactly vertical direction, this term also encompasses deviating directions, as occurs in particular with different inclinations of the backrest.
- the backrest may comprise a frame which In this embodiment, the frame of the backrest may be mounted on the backrest support.
- the engaging piece may be formed as a projection or as a nose.
- it can be dimensioned and shaped in such a way that it can, as it were, fit flush into the latching row.
- it may be formed congruent to the detent row and a movement of the backrest in particular in both directions along the support arm may be locked in the blocking position.
- the support arm of the backrest support may be formed tubular or post-shaped. It can be straight or curved as needed.
- the term "manually applied force" may refer in particular to the fact that a user actuates the actuator with his hand, for example by pulling on the actuator with his hand until it is sufficiently deformed so that the engagement piece is removed from the detent row is or no longer engaged with her.
- the elastic material of the actuator allows it to move back to its original position after the force is no longer effective.
- the elasticity of the actuator may allow it to automatically return to the blocking position. This allows a comfortable and safe operation of the actuator.
- the inventive backrest device allows an efficient implementation of a height-adjustable backrest on a chair with relatively few components.
- the backrest and the backrest support only a single further component, namely the actuator needed.
- a height adjustment can be easily provided in a chair.
- the maintenance of the moving parts can be done so efficiently and easily.
- such a one-piece implementation requires relatively little space.
- the backrest has a Tragarm charged, wherein the backrest is mounted on the backrest support by the support arm of the backrest support is mounted in the Tragarm charged the backrest.
- the Tragarm stamped may be formed thereon or therein.
- Such a configuration with a Tragarm charged in which the support arm is arranged allows stable movement of the backrest along the backrest support. In addition, it allows a simple construction of the backrest device in a stable design.
- the backrest support is equipped with a further support arm on which the backrest is mounted, wherein the further support arm is equipped with a further detent row, the actuator has a further engaging piece, in the blocking position, the further engagement piece of the actuator in the further detent row the further support arm of the backrest carrier engages, in the movement position, the further engagement piece of the actuator out of engagement with the further latching row of the other Support arm of the backrest support is, and the actuator in the movement position is elastically deformed by the manually applied force that the further engagement piece of the actuator is pulled from the further locking row of the other arm of the backrest support. So can be moved or pulled together by the same preferably manually applied force the engaging piece and the further engagement piece together from the detent row and the further detent row.
- the further support arm can in particular run approximately parallel to the support arm. This allows a relatively simple, robust and stable construction.
- the two support arms allow the backrest to be stably supported but still be tiltable to some extent in a lateral direction. Thus, the backrest can allow the user to move in different directions.
- the backrest preferably has a further Tragarm drawn, wherein the backrest is mounted on the backrest support by the further support arm of the backrest support is mounted in the other Tragarm applied the backrest.
- the actuator has a gripping portion for manual actuation of the actuator, in particular in the movement position.
- a gripping portion allows easy and efficient manual operation of the actuator.
- the actuator preferably comprises two arm portions, on each of which one of the engagement piece and the further engagement piece is arranged.
- the two arm sections can be shaped and dimensioned according to the support arms of the backrest carrier.
- the gripping portion of the actuator preferably connects the two arm portions with each other. Other areas between the arm portions may be formed in particular open.
- the actuator may therefore be substantially U-shaped in a plan view.
- Such a gripping portion allows easy operation of the actuator. In particular, so the two engaging pieces can be pulled in one of the two rows of detents.
- the arm portions of the actuator each have a first longitudinal end and a second longitudinal end, wherein each of the arm portions is fixed in the region of its first longitudinal end to the backrest and in the region of its second Having longitudinally one of the engaging piece and the further engaging piece.
- the arm portions of the actuator at the first longitudinal ends preferably each comprise a fixing structure with a cross-sectionally T-shaped insertion pin and a locking pin and the backrest two each one of the insertion pin associated insertion opening with a Einbring Scheme and a fixing region and two each one of the locking pins associated locking openings ,
- the insertion openings of the backrest are preferably dimensioned in the introduction area so that the insertion pin pass through the fixing structure of the arm portions of the actuator and dimensioned in the fixing so that neck portions of the insertion pins of the fixing structure of the arm portions of the actuator fit through and head portions of the insertion pin of the arm portions of the actuator not fit through.
- neck section may refer in particular to the stem section of the T-shape in connection with the T-shaped insertion journals
- head section in connection with the T-shaped insertion journals, in particular on the crown section refer to the T-shape.
- the insertion pins may each comprise a neck or stem portion and a head or crown portion.
- the insertion opening may be shaped and dimensioned such that the head section passes through its insertion area but not through its fixing area.
- the insertion pin can thus be performed for mounting the actuator to the backrest through the Einbring Schemee the insertion openings. Thereafter, they can be slid along the insertion openings until they extend through the fixing areas. At this point, the head portions can not be moved out of the insertion openings and the actuator is attached to the backrest.
- the locking pins of the fixing structure of the arm portions of the actuator are preferably arranged in the locking holes when the insertion pins of the fixing structure of the actuator are arranged in the fixing of the insertion openings of the backrest, and in which the locking pins of the fixing structure of the actuator are arranged outside the locking holes when the insertion pins of the fixing structure of the actuator are arranged in the insertion areas of the insertion openings of the backrest.
- Such a design allows the locking pins hold the insertion pins in the fixing of the insertion openings. In this way it can be prevented that the insertion pin is removed from the insertion openings and the actuator of the backrest.
- the Tragarm charged the backrest is quasi-sleeve-shaped, wherein the support arm of the backrest support is inserted into the Tragarm charged the backrest.
- a sleeve-shaped Tragarm drawn can allow a stable and efficient installation of the backrest on the backrest support.
- the backrest mounted on the backrest support can be moved along the support arm so well guided.
- the further support arm mount is advantageously also sleeve-shaped.
- the detent row of the support arm of the backrest support is preferably located in the inside of the Tragarm charged, wherein the Tragarm drawn the backrest has a trained adjacent to the detent row of the support arm of the backrest support engagement and the actuator is mounted on the Tragarm reciprocen the backrest that the engaging piece extend the actuator in the blocking position through the engagement opening of the Tragarm stamped the backrest therethrough.
- the actuator is made of a plastic.
- Such an actuator can be produced inexpensively precise. In addition, it can thus have the required elasticity.
- the backrest means to a lock, which prevents the backrest is removed from the backrest support or is removable when the actuator is in the movement position.
- the blocking may have a movement limit for the actuator and a stop.
- the movement limitation may comprise a structure which limits a scope of movement of the actuator. This can be achieved that the engaging piece can be pulled to a predefined position or position from the detent row and not further.
- the stop may be placed adjacent to the detent row or at one end thereof. It can be dimensioned so that the engaging piece of the actuator does not pass it in any operating position of the actuator. As a result, he can prevent the actuator and the backrest support connected to it is removed from the backrest support. Such a blockage can avoid incorrect operation of the backrest device and in particular an unintentional removal of the backrest from the backrest support.
- FIG. 1 is an exploded perspective view of an embodiment of a backrest device according to the invention.
- Fig. 2 is a perspective view of the backrest device of Fig. 1;
- Fig. 3 is a cross-sectional view of the backrest device of Fig. 1 in a lower blocking position
- FIG. 4 is a perspective cross-sectional view of the backrest device of FIG.
- Fig. 5 is a cross-sectional view of the backrest device of Fig. 1 in a lower travel position
- Fig. 6 is a cross-sectional view of the backrest device of Fig. 1 in an upper movement position.
- Fig. 1 shows an embodiment of an inventive backrest device 1 for an office chair.
- the backrest device 1 comprises a backrest support 3, a backrest 2 and an actuator 4 or a button.
- the backrest support 3 has two parallel and vertically oriented support arms 31.
- the support arms 31 go via two angle pieces in each case a horizontally aligned connecting arm 32.
- the two parallel connecting arms 32 are connected to one another via a transverse strut 34 and fixed to one another.
- At their angle ends facing away from the longitudinal ends of the connecting arms 32 are each equipped with a mounting structure 33, via which the backrest support 3 can be attached to a seat support or a base member of the office chair.
- the two vertical support arms 31 of the backrest support 3 are each equipped with a row of teeth extending from bottom to top and forward 31 1 1 as a latching row.
- the rows of teeth each have a plurality of teeth 312 spaced by gaps.
- the support arms 31 Above adjacent to the row of teeth 31 1, the support arms 31 each have a stop 313 of a blockage.
- the backrest 2 comprises a frame 21, in which a leaning structure, for example, a textile substrate can be stretched flat.
- a leaning structure for example, a textile substrate can be stretched flat.
- it has two parallel and vertically oriented Tragarm trappeden 22, which are mounted between two horizontal sections.
- the Tragarm trappeden 22 are quasi-sleeve-shaped and have an interior.
- the two Tragarm drawnen 22 are analogously equipped with three vertically spaced openings through which the interior of the associated Tragarm charged 22 is accessible.
- the Tragarm drawnen 22 each have a lower rectangular engagement opening 221, an upper, also rectangular but smaller sized locking opening 223 and a middle insertion opening 222.
- the insertion openings 222 are each formed with a lower rectangular insertion region 2221 and a fixing region 2222 running upwards from the latter in a slot-like manner.
- the actuator 4 is integrally formed and comprises two parallel and vertically aligned arm portions 41, each having an upper first longitudinal end 41 1 and a lower second longitudinal end 412.
- the two arm portions 41 are connected via a gripping portion 42 so interconnected that accordingly the distance between the Tragarm drawnen 22 and the support arms 31 are spaced apart.
- the two arm portions 41 are each provided with an engaging nose 413 extending in the direction of the backrest 2 as an engaging piece.
- the support arms 31 of the backrest support 3 are inserted from below into the two Tragarm drawnen 22 of the backrest 2.
- the support arms 31 are arranged in the interiors of the Tragarm drawnen 22.
- the actuator 4 is attached to the backrest 2 from the front, as described in more detail below, and cooperates with the support arms 31 as described in greater detail below.
- Fig. 3 and Fig. 4 show the backrest device 1 in a lower blocking position.
- the arm portions 41 of the actuator 4 are in each case at one of the Trford chargeden 22 of the backrest 2.
- the arm portions 41 are each provided with a locking pin 415 extending in the direction of the support arm socket 22, which engages in the locking opening 223 of the associated support arm socket 22.
- the arm portions 41 are also with each one in the direction of Tragarm charged 22 extending insertion pin 414 equipped.
- the locking pins 415 and the insertion pins 414 together form a fixing structure of the actuator 4.
- the insertion pins 414 are formed in a horizontal cross section quasi T-shaped and each comprise a head portion 4142 and a neck portion 4141st
- the insertion pins 414 are pressed into the insertion areas 2221 of the insertion openings 222 of the Tragarm chargeden 22.
- the arm portions 41 must be bent.
- the head portions 4142 are arranged in the interior of the Tragarm drawnen 22 and the neck portions 4141 extend through the insertion openings 222 to the outside. Then, the actuator 4 is pushed upward until the neck portions 4141 of the insertion pins 414 of the arm portions 41 in the fixing portions 2222 of the insertion openings 222 of the support arms 22 is located.
- the head portions 4142 are still arranged in the interior of the support arms 22 and their size they can not pass through the fixing portions 2222 of the insertion openings 222 to the outside.
- the arm portions 41 of the actuator are thus fixed to the Tragarm drawnen 22 of the backrest 2.
- the locking pins 415 of the arm portions 41 are snapped into the locking openings 223 of the Tragarm drawnen 22.
- a displacement of the actuator 4 is blocked or blocked down and the actuator 4 is fixedly locked to the backrest.
- Fig. 4 and Fig. 5 defines a lower crossbar of the frame 21 of the backrest 2, a movement or bending of the actuator 4.
- the gripping portion 42 proposes to the crossbar when it comes in a predefined scope from the Blocking position is moved.
- the crossbar thus forms together with the gripping portion 42 a movement limitation of the blockage.
- the projections 313 respectively project beyond the teeth 312 of the associated row of teeth 31 1 to the left or to the extent that the associated engagement piece 413 of the actuator 4 strikes against it when the backrest 2 is moved upwards in the release position.
- the engagement pieces 413 can each be pulled to a predefined position or position from the associated latching row 31 1, in which they are sufficiently far moved to the left that they can pass the associated row of teeth 31 1 but not the associated projection 313.
- the backrest 2 is thus secured by means of the lock on the backrest support 3 and can not be inadvertently removed from this.
- the back support means 1 is shown in an upper blocking position.
- the gripping portion 42 of the actuator 4 is released again, so that due to the inherent elasticity of the actuator 4, the arm portions 41 rest against the Tragarm drawnen 22.
- the engagement lugs 413 of the arm portions 41 engage through the engagement openings 221 of the Tragarm drawnen 22 into the rows of teeth 31 1 of the support arms 31 of the backrest support 3.
- the engaging lugs 413 are each arranged in the gap between the upper two teeth 312.
- the backrest 2 is thus in an uppermost position on the backrest support 3. A vertical movement of the backrest 2 relative to the backrest support 3 is blocked by the actuator 4.
- the present disclosure also includes embodiments having any combination of features that are mentioned or shown above or below various embodiments. It also comprises individual features in the figures, even if they are shown there in connection with other features and / or are not mentioned above or below. Also, the alternatives of embodiments and individual alternatives described in the figures and the description may be excluded from the subject matter of the invention or from the disclosed subject matter.
- the disclosure includes embodiments which exclusively comprise the features described in the claims and in the exemplary embodiments as well as those which include additional other features. Further, the term “comprise” and derivatives thereof do not exclude other elements or steps. "Also, the indefinite article” a "and derivatives thereof do not exclude a plurality The functions of several features recited in the claims may be satisfied by a unit or a step, respectively.
Landscapes
- Chairs For Special Purposes, Such As Reclining Chairs (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP16194436.8A EP3311704A1 (en) | 2016-10-18 | 2016-10-18 | Backrest device |
PCT/EP2017/076438 WO2018073223A1 (en) | 2016-10-18 | 2017-10-17 | Backrest device |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3528666A1 true EP3528666A1 (en) | 2019-08-28 |
EP3528666B1 EP3528666B1 (en) | 2020-07-15 |
Family
ID=57153357
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP16194436.8A Withdrawn EP3311704A1 (en) | 2016-10-18 | 2016-10-18 | Backrest device |
EP17784296.0A Active EP3528666B1 (en) | 2016-10-18 | 2017-10-17 | Backrest device |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP16194436.8A Withdrawn EP3311704A1 (en) | 2016-10-18 | 2016-10-18 | Backrest device |
Country Status (3)
Country | Link |
---|---|
US (1) | US11051623B2 (en) |
EP (2) | EP3311704A1 (en) |
WO (1) | WO2018073223A1 (en) |
Family Cites Families (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3526430A (en) * | 1968-11-18 | 1970-09-01 | Art Metal Knoll Corp | Back height adjustment mechanism |
JPH0227808Y2 (en) * | 1984-11-06 | 1990-07-26 | ||
DE3836327A1 (en) * | 1988-10-25 | 1990-04-26 | Albert Griesemer | DEVICE FOR THE STEP-UP HEIGHT ADJUSTMENT OF A FASTENING OR DEFLECTING POINT FOR A SAFETY BELT OR THE LIKE. |
IT1288164B1 (en) * | 1996-09-06 | 1998-09-11 | Imarc Srl | DEVICE FOR ADJUSTING THE HEIGHT OF THE BACKREST, IN PARTICULAR IN OFFICE CHAIRS. |
US5725278A (en) * | 1996-10-03 | 1998-03-10 | Itw Plastiglide | Chair back height adjuster |
US5853222A (en) * | 1997-06-06 | 1998-12-29 | Haworth, Inc. | Height-adjustable chair back |
US5904400A (en) * | 1997-12-16 | 1999-05-18 | Wei; Hsien-I | Adjustable chair |
US6347777B1 (en) * | 2000-02-01 | 2002-02-19 | Hoist Fitness Systems | Seat adjustment apparatus |
US6793286B2 (en) * | 2001-09-25 | 2004-09-21 | Hon Technology Inc. | Chair adjustment mechanism |
US7188901B2 (en) * | 2004-12-17 | 2007-03-13 | Leggett & Platt Ltd. | Chair adjustment mechanism |
CN2812706Y (en) * | 2005-03-18 | 2006-09-06 | 纪清辉 | Chair back up-down mechanism |
US7445287B2 (en) * | 2006-07-20 | 2008-11-04 | Kuo-Ching Chou | Seat device for a chair |
DE602007014027D1 (en) * | 2007-06-20 | 2011-06-01 | Steelcase Sa | System for height adjustment of the backrest of a chair |
US20110215623A1 (en) * | 2010-03-04 | 2011-09-08 | Hsuan-Chin Tsai | Height-Adjusting Assembly for Office Chair Backrest |
KR101155211B1 (en) * | 2011-08-16 | 2012-06-13 | 윤욱 | a sitting mat for supporting vertebrae lumbales |
DE102012219206B4 (en) | 2012-10-22 | 2017-10-26 | Sedus Stoll Ag | Dorsokinetic backrest of a chair, seating |
US10455946B1 (en) * | 2018-05-17 | 2019-10-29 | Chih-Jen Wang | Backrest height adjusting assembly |
-
2016
- 2016-10-18 EP EP16194436.8A patent/EP3311704A1/en not_active Withdrawn
-
2017
- 2017-10-17 US US16/342,942 patent/US11051623B2/en active Active
- 2017-10-17 EP EP17784296.0A patent/EP3528666B1/en active Active
- 2017-10-17 WO PCT/EP2017/076438 patent/WO2018073223A1/en unknown
Also Published As
Publication number | Publication date |
---|---|
EP3311704A1 (en) | 2018-04-25 |
EP3528666B1 (en) | 2020-07-15 |
WO2018073223A1 (en) | 2018-04-26 |
US20200037766A1 (en) | 2020-02-06 |
US11051623B2 (en) | 2021-07-06 |
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