EP3528666B1 - Backrest device - Google Patents

Backrest device Download PDF

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Publication number
EP3528666B1
EP3528666B1 EP17784296.0A EP17784296A EP3528666B1 EP 3528666 B1 EP3528666 B1 EP 3528666B1 EP 17784296 A EP17784296 A EP 17784296A EP 3528666 B1 EP3528666 B1 EP 3528666B1
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EP
European Patent Office
Prior art keywords
backrest
support
adjusting element
arm
support arm
Prior art date
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Application number
EP17784296.0A
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German (de)
French (fr)
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EP3528666A1 (en
Inventor
Thomas Kamber
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.)
Vitra AG
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Vitra Patente AG
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Publication date
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Publication of EP3528666A1 publication Critical patent/EP3528666A1/en
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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
    • 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
    • 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

Definitions

  • the invention relates to a backrest device according to the preamble of independent claim 1.
  • backrests can be provided with adjustable height in a piece of seating furniture and in particular an office chair.
  • the backrests are connected to a chair base or a seat via a backrest support having two arms.
  • the backrest support can on the one hand allow 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 to allow adaptation to a user.
  • a backrest in which a base plate of a backrest is height-adjustable mounted on two webs of a backrest support connected to a seat.
  • a dorsokinetic bearing is arranged on the base plate, which allows rotational movements.
  • the webs are each equipped with a series of locking structures for height adjustment.
  • a locking lever, a spring-mounted button and a cover are mounted on the base plate.
  • the locking lever is designed to Intervene locking structures of the webs. By pushing the button upward against the spring force, the locking lever is disengaged with respect to the latching structures. In this position, the base plate can be moved down and up along the webs. As soon as the button is released, the springs push it down again and the locking lever engages in the locking structures of the webs again at another point, if necessary. In this position, the base plate is fixedly connected to the webs and thus the backrest support.
  • JPS6182452U discloses another similar backrest device, the actuator consisting of a spring plate and a push button.
  • the object of the following invention is therefore to propose a backrest device which can be installed and maintained relatively easily and which takes up as little space as possible.
  • a backrest device for seating and in particular an office chair comprises a backrest support with a support arm, a backrest mounted on the support arm and an adjusting element which can be adjusted between a blocking position and a movement position.
  • the arm of the backrest support is equipped with a latching row.
  • the actuator is connected to the backrest and has an engagement piece. In the blocking position, the engaging piece of the actuator engages in the latching row of the support arm of the backrest support, so that movement of the backrest along the support arm of the backrest support is blocked. In the moving position, the engaging piece of the actuator is out of engagement with the latching row of the support arm of the backrest support, so that the backrest can typically be moved virtually 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 moving position by a typically manually applied force, so that the engaging piece of the actuator is moved or pulled out of the latching row of the support arm of the backrest support.
  • the latching row can in particular be a row of latching elements, such as a row of teeth, for example, a row of teeth.
  • the locking elements or the teeth can be shaped and dimensioned congruently to the engaging piece of the actuator.
  • the backrest can in particular be quasi vertically movable down and up along the support arm.
  • the term "quasi vertical” can refer to an orientation of the backrest. In addition to a precisely vertical direction, this term also includes directions that deviate from it, as occurs in particular with different inclinations of the backrest.
  • the backrest may include a frame that supports or tensions a lean structure such as a shell, cloth, or cushion.
  • the frame of the backrest can be mounted on the backrest support.
  • the engaging piece can be designed as a projection or as a nose.
  • it can be dimensioned and shaped in such a way that it can engage quasi-flush in the latching row. So it can be designed congruent to the locking row and a movement of the backrest in particular in both directions along the support arm can be blocked in the blocking position.
  • the support arm of the backrest support can be tubular or post-shaped. It can be straight or curved as required.
  • the term "manually applied force” can refer in particular to the fact that a user actuates the actuator with his hand. For example, he can pull the actuator with his hand until it is sufficiently deformed so that the engaging piece is removed from the latching row or is no longer in engagement with it.
  • the elastic material of the actuator allows it to move back to its original position after the force no longer acts.
  • the elasticity of the actuator can enable it to automatically return to the blocking position. This enables comfortable and safe operation of the actuator.
  • the backrest device enables efficient implementation of a height-adjustable backrest on seating with relatively few components.
  • a single additional component namely the actuator, is required.
  • height adjustment can be provided in a simple manner in a piece of seating furniture.
  • the maintenance of the moving parts can also be carried out efficiently and easily.
  • such a one-piece implementation requires relatively little space.
  • the backrest preferably has a support arm frame, the backrest being mounted on the backrest support in that the support arm of the backrest support is mounted in the support arm frame of the backrest. If the backrest has a frame, the support arm frame can be formed thereon or therein. Such a configuration with a support arm frame, in which the support arm is arranged, enables stable movement of the backrest along the backrest support. In addition, it enables a simple construction of the backrest device in a stable design.
  • the backrest support is preferably equipped with a further support arm on which the backrest is mounted, the further support arm being equipped with a further catch row, the actuator having a further engagement piece, in the blocking position the further engagement piece of the actuator in the further catch row of the further support arm engages the backrest support, in the movement position the further engagement piece of the actuator out of engagement with the further latching row of the further Support arm of the backrest support stands, and the actuator in the moving position is elastically deformed by the manually applied force so that the further engagement piece of the actuator is pulled out of the further latching row of the further support arm of the backrest support.
  • the engaging piece and the further engaging piece can be moved or pulled together out of the latching row and the further latching row by the same force, preferably applied manually.
  • the further support arm can in particular run approximately parallel to the support arm. This enables a relatively simple, robust and stable construction.
  • the two support arms enable the backrest to be carried in a stable manner, but can nevertheless be tilted to a certain extent in a lateral direction. The backrest can thus allow the user to move in different directions.
  • the backrest preferably has a further support arm frame, the backrest being mounted on the backrest support by the further support arm of the backrest support being mounted in the further support arm frame of the backrest.
  • the actuator preferably has a gripping section for manual actuation of the actuator, in particular in the movement position.
  • a gripping section enables simple and efficient manual operation of the actuator.
  • the actuator preferably comprises two arm sections, on each of which one of the engaging piece and the further engaging piece is arranged.
  • the two arm sections can be shaped and dimensioned in accordance with the support arms of the backrest support.
  • the gripping section of the actuator preferably connects its two arm sections to one another. Further areas between the arm sections can in particular be open.
  • the actuator can therefore be substantially U-shaped in a supervision.
  • Such a gripping section enables the actuator to be operated easily.
  • the two engagement pieces can be pulled in one of the two rows of catches.
  • the arm sections of the actuator preferably each have a first longitudinal end and a second longitudinal end, each of the arm sections being fixed to the backrest in the region of its first longitudinal end and in the region of its second one Longitudinal end of one of the engaging piece and the further engaging piece. This enables the actuator to be implemented and operated efficiently.
  • the arm sections of the actuator preferably comprise at the first longitudinal ends each a fixing structure with an insertion pin and a locking pin that is quasi T-shaped in cross section, and the backrest has two insertion openings, each associated with one of the insertion pins, with an insertion area and a fixing area, and two locking openings, each associated with one of the locking pins .
  • the insertion openings of the backrest are preferably dimensioned in the insertion area in such a way that the insertion pins of the fixing structure of the arm sections of the actuator fit through and in the fixing area dimensioned so that neck portions of the insertion pins of the fixing structure of the arm sections of the actuator fit through and head portions of the insertion pins of the arm sections of the actuator do not fit through.
  • neck section in connection with the insertion pins with a T-shaped cross section can refer in particular to the trunk section of the T-shape.
  • the term “head section” in connection with the insertion pins with a T-shaped cross section can refer in particular to the crown section of the T-shape.
  • the insertion pins can each comprise a neck or trunk section and a head or crown section.
  • the insertion opening can be shaped and dimensioned such that the head section fits through its insertion area, but not through its fixing area.
  • the insertion pins can thus be guided through the insertion areas of the insertion openings for mounting the actuator on the backrest. Then they can be moved along the insertion openings until they extend through the fixing areas. At this point, the head sections can no longer 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 sections of the actuator are preferably arranged in the locking openings if the insertion pins of the fixing structure of the actuator are arranged in the fixing areas 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 openings if the Insertion pins of the fixing structure of the actuator are arranged in the insertion areas of the insertion openings in the backrest.
  • Such an arrangement enables the locking pins to hold the insertion pins in the fixing areas of the insertion openings. In this way it can be prevented that the insertion pin is removed from the insertion openings and the actuator from the backrest.
  • the support arm frame of the backrest is preferably quasi-sleeve-shaped, the support arm of the backrest support being pushed into the support arm frame of the backrest.
  • Such a sleeve-shaped support arm frame can allow a stable and efficient assembly of the backrest on the backrest support.
  • the backrest mounted on the backrest support can also be moved along the support arm in a neat manner.
  • the further support arm holder is advantageously also sleeve-shaped.
  • the latching row of the support arm of the backrest support is preferably located in the interior of the support arm frame, the support arm frame of the backrest having an engagement opening which is formed adjacent to the latching row of the support arm of the backrest support and the actuating member is mounted on the support arm frames of the backrest in such a way that the engaging piece of the actuating member is located in extend the blocking position through the engaging opening of the support arm frame of the backrest.
  • the actuator is preferably made of a plastic. Such an actuator can be manufactured precisely and inexpensively. It can also have the required elasticity.
  • the backrest device preferably has a lock which prevents the backrest from being removed from the backrest support or being removable when the actuating member is in the movement position.
  • the lock can have a movement limit for the actuator and a stop.
  • the movement limitation can include a structure that limits the extent of the movement of the actuator. It can thereby be achieved that the engaging piece can be pulled out of the latching row to a predefined point or position and not further.
  • the stop can be placed adjacent to the latching row or at one end thereof. It can be dimensioned such that the engaging piece of the actuator does not get past it in any operating position of the actuator. This can prevent the actuator and the backrest support connected to it is removed from the backrest support.
  • Such a lock can prevent incorrect operation of the backrest device and in particular unintentional removal of the backrest from the backrest support.
  • 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 aligned support arms 31.
  • the support arms 31 merge into two horizontally oriented connecting arms 32 via two angle pieces.
  • the two parallel connecting arms 32 are connected to one another via a cross strut 34 and fixed to one another.
  • 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 element of the office chair.
  • the two vertical support arms 31 of the backrest support 3 are each equipped with a row of teeth 311 running from bottom to top and facing forwards as a latching row.
  • the rows of teeth each have a plurality of teeth 312 spaced apart by gaps.
  • the support arms 31 Above adjacent to the row of teeth 311, the support arms 31 each have a stop 313 for blocking.
  • 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
  • the support arm mounts 22 are quasi-sleeve-shaped and have an interior.
  • the two support arm frames 22 are analogously equipped with three vertically spaced openings through which the interior of the associated support arm frame 22 is accessible.
  • the support arm mounts 22 each have a lower rectangular engagement opening 221, an upper, likewise 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 area 2221 and a fixing area 2222 extending upward from it in the manner of a slot.
  • the actuator 4 is formed in one piece and comprises two parallel and vertically aligned arm sections 41, each with an upper first longitudinal end 411 and a lower second longitudinal end 412 or the support arms 31 are spaced apart. Near their second longitudinal ends 412, the two arm sections 41 are each equipped 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 support arm frames 22 of the backrest 2.
  • the support arms 31 are arranged in the interior of the support arm frames 22.
  • the actuator 4 is fastened from the front to the backrest 2 as described in more detail below and interacts with the support arms 31 as described in more detail below.
  • the arm sections 41 of the actuator 4 each rest on one of the tragram frames 22 of the backrest 2. Near their first longitudinal ends 411, the arm sections 41 are each equipped with a locking pin 415 which extends in the direction of the support arm holder 22 and which engages in the locking opening 223 of the associated support arm holder 22. In the position corresponding to the insertion opening 222 of the associated support arm holder 22, the arm sections 41 are also included each equipped with an insertion pin 414 extending in the direction of the support arm socket 22. The locking pins 415 and the insertion pins 414 together form a fixing structure of the actuator 4.
  • the insertion pins 414 are quasi T-shaped in a horizontal cross section and each comprise a head section 4142 and a neck section 4141.
  • the insertion pins 414 are inserted into the insertion areas 2221 of the insertion openings 222 of the support arm sockets 22 pushes in.
  • the arm sections 41 have to be bent.
  • the head sections 4142 are thus arranged in the interior of the support arm mounts 22 and the neck sections 4141 extend outward through the insertion openings 222.
  • the actuator 4 is then pushed upwards until the neck sections 4141 of the insertion pins 414 of the arm sections 41 are located in the fixing areas 2222 of the insertion openings 222 of the support arms 22.
  • the head sections 4142 are still arranged in the interior of the support arms 22 and, due to their size, they cannot reach the outside through the fixing areas 2222 of the insertion openings 222.
  • the arm sections 41 of the actuator are thus fixed to the support arm sockets 22 of the backrest 2.
  • the locking pins 415 of the arm sections 41 are also snapped into the locking openings 223 of the support arm frames 22. As a result, a downward displacement of the actuator 4 is blocked or blocked and the actuator 4 is fixed in place on the backrest.
  • the engaging lugs 413 of the arm sections 41 of the actuator 4 engage through the engaging openings 221 of the support arm sockets 22 of the backrest 2 into the rows of teeth 311 of the support arms 31 of the backrest support 3.
  • the engaging lugs 413 are each in the gap between the lowermost two teeth 312 arranged.
  • the backrest 2 is thus in a lowermost 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.
  • Fig. 5 shows the backrest support device 1 or its actuator 4 in a moving position.
  • the gripping section 42 is manually pulled away from the support arm sockets 22 of the backrest 2. Since the arm sections 41 of the actuator 4 are fixed to the support arm mounts 22 as described above, the actuator becomes 4 elastically bent to the left.
  • the engaging lugs 413 are brought out of engagement with the rows of teeth 311 of the support arms 31 of the backrest support 3.
  • the support arm sockets 22 can now be moved in the vertical direction along the support arms 31. As a result, the entire backrest 2 can move vertically relative to the backrest support 3 and a height position of the backrest 2 can be adjusted.
  • the upper end regions of the support arms 31 are dimensioned such that the support arm frames 22 cannot be lifted up from the backrest support 3.
  • a lower crossbeam of the frame 21 of the backrest 2 limits movement or bending of the actuating member 4.
  • the gripping section 42 strikes the crossbeam when it is moved out of the blocking position to a predefined extent.
  • the crossbar thus forms, together with the gripping section 42, a limitation of the movement of the blocking.
  • the projections 313 each project beyond the teeth 312 of the associated row of teeth 311 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 engaging pieces 413 can each be pulled up to a predefined point or position from the associated latching row 311, in which they are moved sufficiently far to the left that they can pass through the associated tooth row 311 but not the associated projection 313.
  • the backrest 2 is thus secured by means of the lock on the backrest support 3 and cannot be inadvertently removed from it.
  • Fig. 6 the backrest support device 1 is shown in an upper blocking position.
  • the gripping section 42 of the actuator 4 is released again, so that the arm sections 41 rest against the support arm sockets 22 again due to the inherent elasticity of the actuator 4.
  • the engaging lugs 413 of the arm sections 41 engage through the engaging openings 221 of the support arm frames 22 into the rows of teeth 311 of the support arms 31 of the backrest support 3.
  • the engaging lugs 413 are each arranged in the gap between the uppermost 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 with any combination of features mentioned or shown above or below regarding various embodiments. It also includes individual features in the figures, even if they are shown there in connection with other features and / or are not mentioned above or below.
  • the alternatives of embodiments and individual alternatives whose characteristics described in the figures and the description can be excluded from the subject matter of the invention or from the disclosed objects.
  • the disclosure includes embodiments that exclusively include the features described in the claims or in the exemplary embodiments, and also those that include additional other features.
  • the term “comprise” and derivatives thereof do not exclude other elements or steps.
  • the indefinite article “a” or “an” and derivatives thereof do not exclude a large number.
  • the functions of several features listed in the claims can be fulfilled by a unit or a step.
  • the terms “essentially”, “approximately”, “approximately” and the like in connection with a property or a value also define precisely the property or exactly the value.
  • the terms “about” and “approximately” in the context of a given numerical value or range can refer to a value or range which lies within 20%, within 10%, within 5% or within 2% of the given value or range.

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  • Chairs For Special Purposes, Such As Reclining Chairs (AREA)

Description

Technisches GebietTechnical field

Die Erfindung betrifft eine Rückenlehneneinrichtung gemäss dem Oberbegriff des unabhängigen Anspruchs 1. Mit solchen Rückenlehneneinrichtungen können Rückenlehnen höhenverstellbar in einem Sitzmöbel und insbesondere einem Bürostuhl vorgesehen sein.The invention relates to a backrest device according to the preamble of independent claim 1. With such backrest devices, backrests can be provided with adjustable height in a piece of seating furniture and in particular an office chair.

Stand der TechnikState of the art

Viele Sitzmöbel und insbesondere viele Bürostühle sind heutzutage mit Rückenlehnen ausgestattet, die dazu vorgesehen sind, ein ergonomisches Sitzen zu ermöglichen. Dazu werden beispielsweise die Rückenlehnen über einen zwei Arme aufweisenden Lehnenträger mit einer Stuhlbasis beziehungsweise einem Sitz verbunden. Der Lehnenträger kann so einerseits eine federnde Bewegung der Rückenlehne nach hinten zu lassen und andererseits eine federnde Bewegung in einer seitlichen Richtung beziehungsweise eine Verdrehbewegung in einem gewissen Umfang.Many seating furniture and in particular many office chairs are now equipped with backrests that are designed to enable ergonomic sitting. For this purpose, for example, the backrests are connected to a chair base or a seat via a backrest support having two arms. The backrest support can on the one hand allow 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.

Um eine Anpassung an einen Benutzer zu ermöglichen sind Rückenlehnen häufig höhenverstellbar. Beispielsweise ist in der EP 2 721 962 A1 eine Rückenlehne beschrieben, bei der eine Grundplatte einer Rückenlehne höhenverstellbar an zwei Stegen eines mit einem Sitz verbundenen Lehnenträgers montiert ist. An der Grundplatte ist ein dorsokinetisches Lager angeordnet, das rotatorische Bewegungen zulässt. Zur Höhenverstellung sind die Stege jeweils mit einer Reihe von Raststrukturen ausgestattet. An der Grundplatte sind ein Arretierhebel, eine über Federn gelagerte Taste und eine Abdeckung montiert. Dabei ist der Arretierhebel dazu ausgebildet, in die Raststrukturen der Stege einzugreifen. Indem die Taste entgegen der Federkraft nach oben gedrückt wird, wird der Arretierhebel bezüglich der Raststrukturen ausser Eingriff gebracht. In dieser Stellung kann die Grundplatte entlang der Stege nach unten und nach oben bewegt werden. Sobald die Taste losgelassen wird, drücken die Federn sie wieder nach unten und der Arretierhebel greift gegebenenfalls an anderer Stelle wieder in die Raststrukturen der Stege ein. Die Grundplatte ist in dieser Stellung wieder mit den Stegen und somit dem Lehnenträger ortsfest verbunden.Backrests are often height-adjustable to allow adaptation to a user. For example, in the EP 2 721 962 A1 described a backrest in which a base plate of a backrest is height-adjustable mounted on two webs of a backrest support connected to a seat. A dorsokinetic bearing is arranged on the base plate, which allows rotational movements. The webs are each equipped with a series of locking structures for height adjustment. A locking lever, a spring-mounted button and a cover are mounted on the base plate. The locking lever is designed to Intervene locking structures of the webs. By pushing the button upward against the spring force, the locking lever is disengaged with respect to the latching structures. In this position, the base plate can be moved down and up along the webs. As soon as the button is released, the springs push it down again and the locking lever engages in the locking structures of the webs again at another point, if necessary. In this position, the base plate is fixedly connected to the webs and thus the backrest support.

Nachteilig bei Einrichtungen zur Höhenverstellung von Rückenlehnen wie beispielsweise der vorstehend beschriebenen Einrichtung ist, dass typischerweise verhältnismässig viele Bauteile vorhanden sind, die verhältnismässig kompliziert zusammengebaut werden müssen. Das macht die Herstellung der Stuhllehnen beziehungsweise der Stühle verhältnismässig aufwendig und teuer. Zudem sind solche auch verhältnismässig schwierig zu unterhalten, wenn beispielsweise einzelne Bauteile davon ersetzt werden müssen. Weiter sind solche bekannten Einrichtungen meistens verhältnismässig sperrig und voluminös, was unter anderem aus ästhetischen Gründen häufig unerwünscht ist. JPS6182452U offenbart eine andere ähnliche Rückenlehneneinrichtung, wobei das Stellorgan aus einer Federplatte und einem Druckknopf besteht.A disadvantage of devices for height adjustment of backrests, such as the device described above, is that there are typically a relatively large number of components which have to be assembled in a relatively complicated manner. This makes the manufacture of the chair back or the chairs relatively complex and expensive. In addition, they are also relatively difficult to maintain if, for example, individual components have to be replaced. Furthermore, such known devices are usually relatively bulky and bulky, which is often undesirable, inter alia, for aesthetic reasons. JPS6182452U discloses another similar backrest device, the actuator consisting of a spring plate and a push button.

Aufgabe der nachfolgenden Erfindung ist es daher, eine Rückenlehneneinrichtung vorzuschlagen, die verhältnismässig einfach verbaut und gewartet werden kann und die möglichst wenig Raum beansprucht.The object of the following invention is therefore to propose a backrest device which can be installed and maintained relatively easily and which takes up as little space as possible.

Darstellung der ErfindungPresentation of the invention

Die Aufgabe wird erfindungsgemäss durch eine Rückenlehneneinrichtung gelöst, wie sie im unabhängigen Anspruch 1 definiert ist. Vorteilhafte Ausführungsvarianten der Erfindung ergeben sich aus den abhängigen Ansprüchen.According to the invention, the object is achieved by a backrest device as defined in independent claim 1. Advantageous embodiments of the invention result from the dependent claims.

Das Wesen der Erfindung besteht im Folgenden: Eine Rückenlehneneinrichtung für ein Sitzmöbel und insbesondere einen Bürostuhl umfasst einen Lehnenträger mit einem Tragarm, eine am Tragarm montierte Rückenlehne und ein zwischen einer Blockierstellung und einer Bewegungsstellung verstellbares Stellorgan. Der Tragarm des Lehnenträgers ist mit einer Rastreihe ausgestattet. Das Stellorgan ist mit der Rückenlehne verbunden und weist ein Eingreifstück auf. In der Blockierstellung greift das Eingreifstück des Stellorgans in die Rastreihe des Tragarms des Lehnenträgers ein, sodass eine Bewegung der Rückenlehne entlang des Tragarms des Lehnenträgers gesperrt ist. In der Bewegungsstellung steht das Eingreifstück des Stellorgans ausser Eingriff mit der Rastreihe des Tragarms des Lehnenträgers, sodass die Rückenlehne typischerweise quasi vertikal entlang des Tragarms des Lehnenträgers bewegbar ist.The essence of the invention is as follows: A backrest device for seating and in particular an office chair comprises a backrest support with a support arm, a backrest mounted on the support arm and an adjusting element which can be adjusted between a blocking position and a movement position. The arm of the backrest support is equipped with a latching row. The actuator is connected to the backrest and has an engagement piece. In the blocking position, the engaging piece of the actuator engages in the latching row of the support arm of the backrest support, so that movement of the backrest along the support arm of the backrest support is blocked. In the moving position, the engaging piece of the actuator is out of engagement with the latching row of the support arm of the backrest support, so that the backrest can typically be moved virtually vertically along the support arm of the backrest support.

Das Stellorgan ist insbesondere einstückig aus einem elastischen Material hergestellt, wobei es in der Bewegungsstellung durch eine typischerweise manuell aufgebrachte Kraft elastisch deformiert ist, sodass das Eingreifstück des Stellorgans aus der Rastreihe des Tragarms des Lehnenträgers bewegt beziehungsweise gezogen ist.The actuator is in particular made in one piece from an elastic material, wherein it is elastically deformed in the moving position by a typically manually applied force, so that the engaging piece of the actuator is moved or pulled out of the latching row of the support arm of the backrest support.

Die Rastreihe kann insbesondere eine Reihe von Rastelementen wie beispielsweise eine Reihe von Zähnen also eine Zahnreihe sein. Dabei können die Rastelemente beziehungsweise die Zähne kongruent zum Eingreifstück des Stellorgans geformt und dimensioniert sein.The latching row can in particular be a row of latching elements, such as a row of teeth, for example, a row of teeth. The locking elements or the teeth can be shaped and dimensioned congruently to the engaging piece of the actuator.

Die Rückenlehne kann insbesondere quasi vertikal entlang des Tragarms also im Wesentlichen nach unten und nach oben bewegbar sein. Dabei kann der Begriff "quasi vertikal" sich auf eine Ausrichtung der Rückenlehne beziehen. Neben einer genau vertikalen Richtung umfasst dieser Begriff auch davon abweichende Richtungen wie sie insbesondere bei unterschiedlichen Neigungen der Rückenlehne vorkommt.The backrest can in particular be quasi vertically movable down and up along the support arm. The term "quasi vertical" can refer to an orientation of the backrest. In addition to a precisely vertical direction, this term also includes directions that deviate from it, as occurs in particular with different inclinations of the backrest.

Die Rückenlehne kann einen Rahmen umfassen, der eine Anlehnstruktur wie beispielsweise eine Schale, ein Tuch oder ein Polster trägt oder spannt. In einer solchen Ausführungsform kann der Rahmen der Rückenlehne am Lehnenträger montiert sein.The backrest may include a frame that supports or tensions a lean structure such as a shell, cloth, or cushion. In such an embodiment, the frame of the backrest can be mounted on the backrest support.

Das Eingreifstück kann als Vorsprung oder als Nase ausgebildet sein. Es kann insbesondere so dimensioniert und geformt sein, dass es quasi bündig in die Rastreihe eingreifen kann. So kann es kongruent zur Rastreihe ausgebildet sein und eine Bewegung der Rückenlehne insbesondere in beide Richtungen entlang der Tragarms kann in der Blockierstellung gesperrt sein.The engaging piece can be designed as a projection or as a nose. In particular, it can be dimensioned and shaped in such a way that it can engage quasi-flush in the latching row. So it can be designed congruent to the locking row and a movement of the backrest in particular in both directions along the support arm can be blocked in the blocking position.

Der Tragarm des Lehnenträgers kann rohr- beziehungsweise pfostenförmig ausgebildet sein. Er kann je nach Bedarf gerade oder auch gekrümmt sein.The support arm of the backrest support can be tubular or post-shaped. It can be straight or curved as required.

Der Begriff "manuell aufgebrachte Kraft" kann sich insbesondere darauf beziehen, dass ein Nutzer mit seiner Hand das Stellorgan betätigt. Dabei kann er beispielsweise mit seiner Hand am Stellorgan ziehen, bis es ausreichend deformiert ist, damit das Eingreifstück von der Rastreihe entfernt ist beziehungsweise nicht mehr mit ihr in Eingriff steht.The term "manually applied force" can refer in particular to the fact that a user actuates the actuator with his hand. For example, he can pull the actuator with his hand until it is sufficiently deformed so that the engaging piece is removed from the latching row or is no longer in engagement with it.

Das elastische Material des Stellorgans ermöglicht, dass es sich wieder in seine Ausgangsstellung zurückbewegt, nachdem die Kraft nicht mehr wirkt. Insbesondere kann die Elastizität des Stellorgans ermöglichen, dass es sich von selbst wieder in die Blockierstellung stellt. Dies ermöglicht eine komfortable und sichere Bedienung des Stellorgans.The elastic material of the actuator allows it to move back to its original position after the force no longer acts. In particular, the elasticity of the actuator can enable it to automatically return to the blocking position. This enables comfortable and safe operation of the actuator.

Die erfindungsgemässe Lehneneinrichtung ermöglicht eine effiziente Implementierung einer höhenverstellbaren Rückenlehne an einem Sitzmöbel mit verhältnismässig wenigen Bauteilen. Insbesondere wird erfindungsgemäss ausser der Rückenlehne und dem Lehnenträger lediglich ein einziges weiteres Bauteil, nämlich das Stellorgan, benötigt. So kann eine Höhenverstellung auf einfache Weise in einem Sitzmöbel vorgesehen werden. Auch der Unterhalt der beweglichen Teile kann so effizient und einfach erfolgen. Zudem benötigt eine solche einteilige Realisierung verhältnismässig wenig Raum.The backrest device according to the invention enables efficient implementation of a height-adjustable backrest on seating with relatively few components. In particular, according to the invention, apart from the backrest and the backrest support, only a single additional component, namely the actuator, is required. In this way, height adjustment can be provided in a simple manner in a piece of seating furniture. The maintenance of the moving parts can also be carried out efficiently and easily. In addition, such a one-piece implementation requires relatively little space.

Bevorzugt weist die Rückenlehne eine Tragarmfassung auf, wobei die Rückenlehne am Lehnenträger montiert ist, indem der Tragarm des Lehnenträgers in der Tragarmfassung der Rückenlehne gelagert ist. Falls die Rückenlehne einen Rahmen aufweist, kann die Tragarmfassung daran beziehungsweise darin ausgebildet sein. Eine solche Ausgestaltung mit einer Tragarmfassung, in dem der Tragarm angeordnet ist, ermöglicht eine stabile Bewegung der Rückenlehne entlang des Lehnenträgers. Zudem ermöglicht es einen einfachen Aufbau der Lehneneinrichtung in einer stabilen Ausführung.The backrest preferably has a support arm frame, the backrest being mounted on the backrest support in that the support arm of the backrest support is mounted in the support arm frame of the backrest. If the backrest has a frame, the support arm frame can be formed thereon or therein. Such a configuration with a support arm frame, in which the support arm is arranged, enables stable movement of the backrest along the backrest support. In addition, it enables a simple construction of the backrest device in a stable design.

Vorzugsweise ist der Lehnenträger mit einem weiteren Tragarm ausgestattet, an der die Rückenlehne montiert ist, wobei der weitere Tragarm mit einer weiteren Rastreihe ausgestattet ist, das Stellorgan ein weiteres Eingreifstück aufweist, in der Blockierstellung das weitere Eingreifstück des Stellorgans in die weitere Rastreihe des weiteren Tragarms des Lehnenträgers eingreift, in der Bewegungsstellung das weitere Eingreifstück des Stellorgans ausser Eingriff mit der weiteren Rastreihe des weiteren Tragarms des Lehnenträgers steht, und das Stellorgan in der Bewegungsstellung so durch die manuell aufgebrachte Kraft elastisch deformiert ist, dass das weitere Eingreifstück des Stellorgans aus der weiteren Rastreihe des weiteren Tragarms des Lehnenträgers gezogen ist.The backrest support is preferably equipped with a further support arm on which the backrest is mounted, the further support arm being equipped with a further catch row, the actuator having a further engagement piece, in the blocking position the further engagement piece of the actuator in the further catch row of the further support arm engages the backrest support, in the movement position the further engagement piece of the actuator out of engagement with the further latching row of the further Support arm of the backrest support stands, and the actuator in the moving position is elastically deformed by the manually applied force so that the further engagement piece of the actuator is pulled out of the further latching row of the further support arm of the backrest support.

So können also durch die gleiche vorzugsweise manuell aufgebrachte Kraft das Eingreifstück und das weitere Eingreifstück zusammen aus der Rastreihe und der weiteren Rastreihe bewegt beziehungsweise gezogen werden.Thus, the engaging piece and the further engaging piece can be moved or pulled together out of the latching row and the further latching row by the same force, preferably applied manually.

Der weitere Tragarm kann insbesondere etwa parallel zum Tragarm verlaufen. Dies ermöglicht eine verhältnismässig einfache, robuste und stabile Konstruktion. Insbesondere ermöglichen die zwei Tragarme, dass die Rückenlehne stabil getragen wird aber dennoch auch in eine seitliche Richtung in einem gewissen Umfang kippbar ist. So kann die Rückenlehne dem Benutzer eine Bewegung in unterschiedlicher Richtung ermöglichen.The further support arm can in particular run approximately parallel to the support arm. This enables a relatively simple, robust and stable construction. In particular, the two support arms enable the backrest to be carried in a stable manner, but can nevertheless be tilted to a certain extent in a lateral direction. The backrest can thus allow the user to move in different directions.

Dabei weist die Rückenlehne bevorzugt eine weitere Tragarmfassung auf, wobei die Rückenlehne am Lehnenträger montiert ist, indem der weitere Tragarm des Lehnenträgers in der weiteren Tragarmfassung der Rückenlehne gelagert ist.The backrest preferably has a further support arm frame, the backrest being mounted on the backrest support by the further support arm of the backrest support being mounted in the further support arm frame of the backrest.

Bevorzugt weist das Stellorgan einen Greifabschnitt zur manuellen Betätigung des Stellorgans insbesondere in die Bewegungsstellung auf. Ein solcher Greifabschnitt ermöglicht eine einfache und effiziente manuelle Bedienung des Stellorgans. Dabei umfasst das Stellorgan vorzugsweise zwei Armabschnitte, an denen jeweils eines des Eingreifstücks und des weiteren Eingreifstücks angeordnet ist. Die beiden Armabschnitte können entsprechend den Tragarmen des Lehnenträgers geformt und dimensioniert sein. Dabei verbindet der Greifabschnitt des Stellorgans vorzugsweise dessen beide Armabschnitte miteinander. Weitere Bereiche zwischen den Armabschnitten können insbesondere offen ausgebildet sein. Das Stellorgan kann also in einer Aufsicht im Wesentlichen U-förmig sein. Ein solcher Greifabschnitt ermöglicht eine einfache Bedienung des Stellorgans. Insbesondere können so die beiden Eingreifstücke in einem aus den beiden Rastreihen gezogen werden.The actuator preferably has a gripping section for manual actuation of the actuator, in particular in the movement position. Such a gripping section enables simple and efficient manual operation of the actuator. The actuator preferably comprises two arm sections, on each of which one of the engaging piece and the further engaging piece is arranged. The two arm sections can be shaped and dimensioned in accordance with the support arms of the backrest support. The gripping section of the actuator preferably connects its two arm sections to one another. Further areas between the arm sections can in particular be open. The actuator can therefore be substantially U-shaped in a supervision. Such a gripping section enables the actuator to be operated easily. In particular, the two engagement pieces can be pulled in one of the two rows of catches.

Bevorzugt weisen die Armabschnitte des Stellorgans jeweils ein erstes Längsende und ein zweites Längsende auf, wobei jeder der Armabschnitte im Bereich seines ersten Längsendes an der Rückenlehne fixiert ist und im Bereich seines zweiten Längsendes eines des Eingreifstücks und des weiteren Eingreifstücks aufweist. Dies ermöglicht eine effiziente Realisierung und Bedienung des Stellorgans. Dabei umfassen die Armabschnitte des Stellorgans an den ersten Längsenden vorzugsweise jeweils eine Fixierstruktur mit einem im Querschnitt quasi T-förmigen Einschubzapfen und einem Arretierzapfen und die Rückenlehne zwei jeweils einem der Einschubzapfen zugeordnete Einschuböffnung mit einem Einbringbereich und einem Fixierbereich und zwei jeweils einem der Arretierzapfen zugeordnet Arretieröffnungen.The arm sections of the actuator preferably each have a first longitudinal end and a second longitudinal end, each of the arm sections being fixed to the backrest in the region of its first longitudinal end and in the region of its second one Longitudinal end of one of the engaging piece and the further engaging piece. This enables the actuator to be implemented and operated efficiently. The arm sections of the actuator preferably comprise at the first longitudinal ends each a fixing structure with an insertion pin and a locking pin that is quasi T-shaped in cross section, and the backrest has two insertion openings, each associated with one of the insertion pins, with an insertion area and a fixing area, and two locking openings, each associated with one of the locking pins .

Die Einschuböffnungen der Rückenlehne sind vorzugsweise im Einbringbereich so dimensioniert, dass die Einschubzapfen der Fixierstruktur der Armabschnitte des Stellorgans hindurchpassen und im Fixierbereich so dimensioniert, dass Halsabschnitte der Einschubzapfen der Fixierstruktur der Armabschnitte des Stellorgans hindurchpassen und Kopfabschnitte der Einschubzapfen der Armabschnitte des Stellorgans nicht hindurchpassen. Der Begriff "Halsabschnitt" kann sich im Zusammenhang mit den im Querschnitt T-förmigen Einschubzapfen insbesondere auf den Stammabschnitt der T-Form beziehen. Analog dazu kann sich der Begriff "Kopfabschnitt" im Zusammenhang mit den im Querschnitt T-förmigen Einschubzapfen insbesondere auf den Kronenabschnitt der T-Form beziehen. In anderen Worten können die Einschubzapfen jeweils einen Hals- oder Stammabschnitt umfassen und einen Kopf- oder Kronenabschnitt. Dabei kann die Einschuböffnung so geformt und dimensioniert sein, dass der Kopfabschnitt durch ihren Einbringbereich hindurch passt nicht jedoch durch ihren Fixierbereich. Die Einschubzapfen können also zur Montage des Stellorgans an der Rückenlehne durch die Einbringbereiche der Einschuböffnungen hindurch geführt werden. Danach können sie entlang der Einschuböffnungen verschoben werden, bis sie sich durch die Fixierbereiche hindurch erstrecken. An dieser Stelle können die Kopfabschnitte nicht mehr aus den Einschuböffnungen bewegt werden und das Stellorgan ist an der Rückenlehne befestigt.The insertion openings of the backrest are preferably dimensioned in the insertion area in such a way that the insertion pins of the fixing structure of the arm sections of the actuator fit through and in the fixing area dimensioned so that neck portions of the insertion pins of the fixing structure of the arm sections of the actuator fit through and head portions of the insertion pins of the arm sections of the actuator do not fit through. The term "neck section" in connection with the insertion pins with a T-shaped cross section can refer in particular to the trunk section of the T-shape. Analogously, the term “head section” in connection with the insertion pins with a T-shaped cross section can refer in particular to the crown section of the T-shape. In other words, the insertion pins can each comprise a neck or trunk section and a head or crown section. The insertion opening can be shaped and dimensioned such that the head section fits through its insertion area, but not through its fixing area. The insertion pins can thus be guided through the insertion areas of the insertion openings for mounting the actuator on the backrest. Then they can be moved along the insertion openings until they extend through the fixing areas. At this point, the head sections can no longer be moved out of the insertion openings and the actuator is attached to the backrest.

Dabei sind die Arretierzapfen der Fixierstruktur der Armabschnitte des Stellorgans vorzugsweise in den Arretieröffnungen angeordnet, wenn die Einschubzapfen der Fixierstruktur des Stellorgans in den Fixierbereichen der Einschuböffnungen der Rückenlehne angeordnet sind, und bei der die Arretierzapfen der Fixierstruktur des Stellorgans ausserhalb der Arretieröffnungen angeordnet sind, wenn die Einschubzapfen der Fixierstruktur des Stellorgans in den Einbringbereichen der Einschuböffnungen der Rückenlehne angeordnet sind. Eine solche Ausgestaltung ermöglicht, dass die Arretierzapfen die Einschubzapfen in den Fixierbereichen der Einschuböffnungen halten. Auf diese Weise kann verhindert werden, dass die Einschubzapfen aus den Einschuböffnungen und das Stellorgan von der Rückenlehne entfernt wird.The locking pins of the fixing structure of the arm sections of the actuator are preferably arranged in the locking openings if the insertion pins of the fixing structure of the actuator are arranged in the fixing areas 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 openings if the Insertion pins of the fixing structure of the actuator are arranged in the insertion areas of the insertion openings in the backrest. Such an arrangement enables the locking pins to hold the insertion pins in the fixing areas of the insertion openings. In this way it can be prevented that the insertion pin is removed from the insertion openings and the actuator from the backrest.

Vorzugsweise ist die Tragarmfassung der Rückenlehne quasi hülsenförmig ausgebildet, wobei der Tragarm des Lehnenträgers in die Tragarmfassung der Rückenlehne eingeschoben ist. Eine solche hülsenförmige Tragarmfassung kann eine stabile und effiziente Montage der Rückenlehne am Lehnenträger ermöglichen. Auch kann die am Lehnenträger montierte Rückenlehne so sauber geführt entlang des Tragarms bewegt werden. In Ausführungen mit Lehnenträger mit zwei Tragarmen ist die weitere Tragarmfassung mit Vorteil ebenfalls hülsenförmig ausgebildet.The support arm frame of the backrest is preferably quasi-sleeve-shaped, the support arm of the backrest support being pushed into the support arm frame of the backrest. Such a sleeve-shaped support arm frame can allow a stable and efficient assembly of the backrest on the backrest support. The backrest mounted on the backrest support can also be moved along the support arm in a neat manner. In versions with a backrest support with two support arms, the further support arm holder is advantageously also sleeve-shaped.

Die Rastreihe des Tragarms des Lehnenträgers befindet sich vorzugsweise im Innern der Tragarmfassung, wobei die Tragarmfassung der Rückenlehne eine benachbart zu der Rastreihe des Tragarms des Lehnenträgers ausgebildete Eingreiföffnung aufweist und das Stellorgan so an der Tragarmfassungen der Rückenlehne montiert ist, dass sich das Eingreifstück des Stellorgans in der Blockierstellung durch die Eingreiföffnung der Tragarmfassung der Rückenlehne hindurch erstrecken. Dies kann eine effiziente einfache Konstruktion ermöglichen.The latching row of the support arm of the backrest support is preferably located in the interior of the support arm frame, the support arm frame of the backrest having an engagement opening which is formed adjacent to the latching row of the support arm of the backrest support and the actuating member is mounted on the support arm frames of the backrest in such a way that the engaging piece of the actuating member is located in extend the blocking position through the engaging opening of the support arm frame of the backrest. This can enable an efficient simple construction.

Vorzugsweise ist das Stellorgan aus einem Kunststoff hergestellt. Ein solches Stellorgan kann kostengünstig präzise hergestellt werden. Zudem kann es so die benötigte Elastizität aufweisen.The actuator is preferably made of a plastic. Such an actuator can be manufactured precisely and inexpensively. It can also have the required elasticity.

Bevorzugt weist die Rückenlehneneinrichtung eine Sperrung auf, welche verhindert, dass die Rückenlehne vom Lehnenträger entfernt wird beziehungsweise entfernbar ist, wenn sich das Stellorgan in der Bewegungsstellung befindet. Die Sperrung kann eine Bewegungsbegrenzung für das Stellorgan und einen Anschlag aufweisen. Dabei kann die Bewegungsbegrenzung eine Struktur umfassen, die einen Umfang der Bewegung des Stellorgans begrenzt. Dadurch kann erreicht werden, dass das Eingreifstück bis an eine vordefinierte Stelle beziehungsweise Position aus der Rastreihe gezogen werden kann und nicht weiter. Der Anschlag kann benachbart zur Rastreihe beziehungsweise an einem Ende davon platziert sein. Er kann so dimensioniert sein, dass das Eingreifstück des Stellorgans in keiner Betriebsstellung des Stellorgans an ihm vorbeikommt. Dadurch kann er verhindern, dass das Stellorgan und der mit ihm verbundene Lehnenträger vom Lehnenträger entfernt wird. Eine solche Sperrung kann eine Fehlbedienung der Rückenlehneneinrichtung und insbesondere ein unbeabsichtigtes Entnehmen der Rückenlehne vom Lehnenträger vermeiden.The backrest device preferably has a lock which prevents the backrest from being removed from the backrest support or being removable when the actuating member is in the movement position. The lock can have a movement limit for the actuator and a stop. The movement limitation can include a structure that limits the extent of the movement of the actuator. It can thereby be achieved that the engaging piece can be pulled out of the latching row to a predefined point or position and not further. The stop can be placed adjacent to the latching row or at one end thereof. It can be dimensioned such that the engaging piece of the actuator does not get past it in any operating position of the actuator. This can prevent the actuator and the backrest support connected to it is removed from the backrest support. Such a lock can prevent incorrect operation of the backrest device and in particular unintentional removal of the backrest from the backrest support.

Kurze Beschreibung der ZeichnungenBrief description of the drawings

Weitere vorteilhafte Ausgestaltungen der Erfindung ergeben sich aus der nachfolgenden Beschreibung von Ausführungsbeispielen der Erfindung mithilfe der schematischen Zeichnung. Insbesondere wird im Folgenden die erfindungsgemässe Rückenlehneneinrichtung unter Bezugnahme auf die beigefügten Zeichnungen anhand von Ausführungsbeispielen detaillierter beschrieben. Es zeigen:

Fig. 1
eine perspektivische Explosionsansicht eines Ausführungsbeispiels einer erfindungsgemässen Rückenlehneneinrichtung;
Fig. 2
eine perspektivische Ansicht der Rückenlehneneinrichtung von Fig. 1;
Fig. 3
eine Querschnittsansicht der Rückenlehneneinrichtung von Fig. 1 in einer unteren Blockierstellung;
Fig. 4
eine perspektivische Querschnittsansicht der Rückenlehneneinrichtung von Fig. 1 in der unteren Blockierstellung;
Fig. 5
eine Querschnittsansicht der Rückenlehneneinrichtung von Fig. 1 in einer unteren Bewegungsstellung; und
Fig. 6
eine Querschnittsansicht der Rückenlehneneinrichtung von Fig. 1 in einer oberen Bewegungsstellung.
Further advantageous embodiments of the invention result from the following description of exemplary embodiments of the invention with the aid of the schematic drawing. In particular, the backrest device according to the invention is described in more detail below with reference to the accompanying drawings using exemplary embodiments. Show it:
Fig. 1
a perspective exploded view of an embodiment of an inventive backrest device;
Fig. 2
a perspective view of the backrest device of Fig. 1 ;
Fig. 3
a cross-sectional view of the backrest device of Fig. 1 in a lower blocking position;
Fig. 4
a cross-sectional perspective view of the backrest device of FIG Fig. 1 in the lower blocking position;
Fig. 5
a cross-sectional view of the backrest device of Fig. 1 in a lower movement position; and
Fig. 6
a cross-sectional view of the backrest device of Fig. 1 in an upper movement position.

Weg(e) zur Ausführung der ErfindungWay (s) of carrying out the invention

Bestimmte Ausdrücke werden in der folgenden Beschreibung aus praktischen Gründen verwendet und sind nicht einschränkend zu verstehen. Die Wörter "rechts", "links", "unten" und "oben" bezeichnen Richtungen in der Zeichnung, auf die Bezug genommen wird. Die Ausdrücke "nach innen", "nach aussen" "unterhalb", "oberhalb", "links", "rechts" oder ähnliche werden zur Beschreibung der Anordnung bezeichneter Teile zueinander, der Bewegung bezeichneter Teile zueinander und der Richtungen hin zum oder weg vom geometrischen Mittelpunkt der Erfindung sowie benannter Teile derselben wie in den Fig. dargestellt verwendet. Diese räumlichen Relativangaben umfassen auch andere Positionen und Ausrichtungen als die in den Fig. dargestellten. Zum Beispiel wenn ein in den Fig. dargestelltes Teil umgedreht wird, sind Elemente oder Merkmale, die als "unterhalb" beschrieben sind, dann "oberhalb". Die Terminologie umfasst die oben ausdrücklich erwähnten Wörter, Ableitungen von denselben und Wörter ähnlicher Bedeutung.Certain terms are used in the following description for practical reasons and are not meant to be limiting. The words "right", "left", "bottom" and "top" indicate directions in the drawing that are referred to. The terms "inward", "outward""below","above","left","right" or the like are used to describe the arrangement of designated parts relative to one another, the movement of designated parts relative to one another and the directions towards or away from geometric center of the invention and named parts thereof used as shown in the figures. This spatial relative information also includes different positions and orientations than those shown in the figures. For example, when a part shown in the figures is turned over, elements or features described as "below" are then "above". The terminology includes the words expressly mentioned above, derivatives of the same, and words of similar meaning.

Um Wiederholungen in den Fig. und der zugehörigen Beschreibung der verschiedenen Aspekte und Ausführungsbeispiele zu vermeiden, sollen bestimmte Merkmale als gemeinsam für verschieden Aspekte und Ausführungsbeispiele verstanden werden. Das Weglassen eines Aspekts in der Beschreibung oder einer Fig. lässt nicht darauf schliessen, dass dieser Aspekt in dem zugehörigen Ausführungsbeispiel fehlt. Vielmehr kann ein solches Weglassen der Klarheit und dem Verhindern von Wiederholungen dienen. In diesem Zusammenhang gilt für die gesamte weitere Beschreibung folgende Festlegung: Sind in einer Figur zum Zweck zeichnerischer Eindeutigkeit Bezugszeichen enthalten, aber im unmittelbar zugehörigen Beschreibungstext nicht erwähnt, so wird auf deren Erläuterung in vorangehenden Figurenbeschreibungen Bezug genommen. Sind ausserdem im unmittelbar zu einer Figur gehörigen Beschreibungstext Bezugszeichen erwähnt, die in der zugehörigen Figur nicht enthalten sind, so wird auf die vorangehenden und nachstehenden Figuren verwiesen. Ähnliche Bezugszeichen in zwei oder mehreren Fig. stehen für ähnliche oder gleiche Elemente.In order to avoid repetitions in the figures and the associated description of the different aspects and exemplary embodiments, certain features are to be understood as common for different aspects and exemplary embodiments. The omission of an aspect in the description or a figure does not suggest that this aspect is missing in the associated exemplary embodiment. Rather, such omission can serve clarity and prevent repetition. In this context, the following definition applies to the entire further description: If reference numerals are included in a figure for the sake of clarity of drawing, but are not mentioned in the directly associated description text, reference is made to their explanation in the preceding figure descriptions. If, in the description text belonging directly to a figure, reference symbols are also mentioned which are not contained in the associated figure, reference is made to the preceding and following figures. Similar reference numerals in two or more figures stand for similar or identical elements.

Fig. 1 zeigt ein Ausführungsbeispiel einer erfindungsgemässen Rückenlehneneinrichtung 1 für einen Bürostuhl. Die Rückenlehneneinrichtung 1 umfasst einen Lehnenträger 3, eine Rückenlehne 2 und ein Stellorgan 4 beziehungsweise eine Taste. Der Lehnenträger 3 weist zwei parallele und vertikal ausgerichtete Tragarme 31 auf. Die Tragarme 31 gehen über zwei Winkelstücke in jeweils einen horizontal ausgerichteten Verbindungsarm 32 über. Die beiden parallelen Verbindungsarme 32 sind über eine Querstrebe 34 miteinander verbunden und zueinander fixiert. An ihren den Winkelstücken abgewandten Längesenden sind die Verbindungsarme 32 mit jeweils einer Montierstruktur 33 ausgestattet, über welche der Lehnenträger 3 an einem Sitzträger oder einem Basiselement des Bürostuhls befestigt werden kann. Die beiden vertikalen Tragarme 31 des Lehnenträgers 3 sind mit jeweils einer von unten nach oben verlaufenden und nach vorne ausgerichteten Zahnreihe 311 als Rastreihe ausgestattet. Die Zahnreihen weisen jeweils eine Mehrzahl von durch Lücken beabstandeten Zähnen 312 auf. Oberhalb benachbart zur Zahnreihe 311 weisen die Tragarme 31 jeweils einen Anschlag 313 einer Sperrung auf. 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 aligned support arms 31. The support arms 31 merge into two horizontally oriented connecting arms 32 via two angle pieces. The two parallel connecting arms 32 are connected to one another via a cross strut 34 and fixed to one another. At their longitudinal ends facing away from the angle pieces, 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 element of the office chair. The two vertical support arms 31 of the backrest support 3 are each equipped with a row of teeth 311 running from bottom to top and facing forwards as a latching row. The rows of teeth each have a plurality of teeth 312 spaced apart by gaps. Above adjacent to the row of teeth 311, the support arms 31 each have a stop 313 for blocking.

Die Rückenlehne 2 umfasst einen Rahmen 21, in den eine Anlehnstruktur beispielsweise ein textiles Substrat flächig aufgespannt werden kann. Zudem weist sie zwei parallele und vertikal ausgerichtete Tragarmfassungen 22 auf, die zwischen zwei Horizontalabschnitten befestigt sind. Die Tragarmfassungen 22 sind quasi hülsenförmig ausgebildet und weisen einen Innenraum auf. An einer Vorderseite sind die beiden Tragarmfassungen 22 analog mit drei vertikal beabstandeten Öffnungen ausgestattet, durch welche der Innenraum der zugehörigen Tragarmfassung 22 zugänglich ist. Insbesondere weisen die Tragarmfassungen 22 jeweils eine untere rechteckige Eingrifföffnung 221, eine obere, ebenfalls rechteckige aber kleiner dimensionierte Arretieröffnung 223 und eine mittlere Einschieböffnung 222 auf. Die Einschieböffnungen 222 sind jeweils mit einem unteren rechteckigen Einbringbereich 2221 und einem von diesem aus schlitzartig nach oben verlaufenden Fixierbereich 2222 ausgebildet.The backrest 2 comprises a frame 21 in which a leaning structure, for example a textile substrate, can be stretched flat. In addition, it has two parallel and vertically aligned support arm mounts 22, which are fastened between two horizontal sections. The support arm mounts 22 are quasi-sleeve-shaped and have an interior. On a front side, the two support arm frames 22 are analogously equipped with three vertically spaced openings through which the interior of the associated support arm frame 22 is accessible. In particular, the support arm mounts 22 each have a lower rectangular engagement opening 221, an upper, likewise 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 area 2221 and a fixing area 2222 extending upward from it in the manner of a slot.

Das Stellorgan 4 ist einstückig ausgebildet und umfasst zwei parallele und vertikal ausgerichtete Armabschnitte 41 mit jeweils einem oberen ersten Längsende 411 und einem unteren zweiten Längsende 412. Die beiden Armabschnitte 41 sind über einen Greifabschnitt 42 so miteinander verbunden, dass sich entsprechend dem Abstand der Tragarmfassungen 22 beziehungsweise der Tragarme 31 voneinander beabstandet sind. Nahe ihren zweiten Längenden 412 sind die beiden Armabschnitte 41 jeweils mit einem sich in Richtung der Rückenlehne 2 erstreckenden Eingreifnase 413 als Eingreifstück ausgestattet.The actuator 4 is formed in one piece and comprises two parallel and vertically aligned arm sections 41, each with an upper first longitudinal end 411 and a lower second longitudinal end 412 or the support arms 31 are spaced apart. Near their second longitudinal ends 412, the two arm sections 41 are each equipped with an engaging nose 413 extending in the direction of the backrest 2 as an engaging piece.

Im in Fig. 2 gezeigten zusammengebauten Zustand sind die Tragarme 31 des Lehnenträgers 3 von unten in die beiden Tragarmfassungen 22 der Rückenlehne 2 eingeführt. Dabei befinden sich die Tragarme 31 in den Innenräumen der Tragarmfassungen 22 angeordnet. Das Stellorgan 4 ist wie unten detaillierter beschrieben von vorne an der Rückenlehne 2 befestigt und wirkt wie unten detaillierter beschrieben mit den Tragarmen 31 zusammen.In in Fig. 2 Assembled state shown, the support arms 31 of the backrest support 3 are inserted from below into the two support arm frames 22 of the backrest 2. The support arms 31 are arranged in the interior of the support arm frames 22. The actuator 4 is fastened from the front to the backrest 2 as described in more detail below and interacts with the support arms 31 as described in more detail below.

Fig. 3 und Fig. 4 zeigen die Rückenlehneneinrichtung 1 in einer unteren Blockierstellung. Dabei liegen die Armabschnitte 41 des Stellorgans 4 jeweils an einer der Tragramfassungen 22 der Rückenlehne 2 an. Nahe ihrer ersten Längsenden 411 sind die Armabschnitte 41 mit jeweils einem sich in Richtung Tragarmfassung 22 erstreckenden Arretierzapfen 415 ausgestattet, der in die Arretieröffnung 223 der zugehörigen Tragarmfassung 22 eingreift. In zur Einschieböffnung 222 der zugehörigen Tragarmfassung 22 korrespondierenden Lage sind die Armabschnitte 41 zudem mit jeweils einem sich in Richtung Tragarmfassung 22 erstreckenden Einschubzapfen 414 ausgestattet. Die Arretierzapfen 415 und die Einschubzapfen 414 bilden zusammen eine Fixierstruktur des Stellorgans 4. 3 and 4 show the backrest device 1 in a lower blocking position. The arm sections 41 of the actuator 4 each rest on one of the tragram frames 22 of the backrest 2. Near their first longitudinal ends 411, the arm sections 41 are each equipped with a locking pin 415 which extends in the direction of the support arm holder 22 and which engages in the locking opening 223 of the associated support arm holder 22. In the position corresponding to the insertion opening 222 of the associated support arm holder 22, the arm sections 41 are also included each equipped with an insertion pin 414 extending in the direction of the support arm socket 22. The locking pins 415 and the insertion pins 414 together form a fixing structure of the actuator 4.

Wie in Fig. 4 ersichtlich ist, sind die Einschubzapfen 414 in einem horizontalen Querschnitt quasi T-förmig ausgebildet und umfassen jeweils einen Kopfabschnitt 4142 und einen Halsabschnitt 4141. Zum Montieren des Stellorgans 4 an der Rückenlehne 2 werden die Einschubzapfen 414 in die Einbringbereiche 2221 der Einschiebeöffnungen 222 der Tragarmfassungen 22 eindrückt. Dazu müssen die Armabschnitte 41 gebogen werden. Die Kopfabschnitte 4142 sind so im Innenraum der Tragarmfassungen 22 angeordnet und die Halsabschnitte 4141 erstrecken sich durch die Einschiebeöffnungen 222 nach aussen. Dann wird das Stellorgan 4 nach oben geschoben, bis sich die Halsabschnitte 4141 der Einschubzapfen 414 der Armabschnitte 41 in den Fixierbereichen 2222 der Einschuböffnungen 222 der Tragarme 22 befindet. Die Kopfabschnitte 4142 sind immer noch im Innenraum der Tragarme 22 angeordnet und durch Ihre Grösse können sie nicht durch die Fixierbereiche 2222 der Einschuböffnungen 222 nach aussen gelangen. Die Armabschnitte 41 des Stellorgans sind so also an den Tragarmfassungen 22 der Rückenlehne 2 fixiert. Gleichzeitig sind auch die Arretierzapfen 415 der Armabschnitte 41 in die Arretieröffnungen 223 der Tragarmfassungen 22 eingeschnappt. Dadurch wird eine Verschiebung des Stellorgans 4 nach unten blockiert beziehungsweise gesperrt und das Stellorgan 4 ist fixiert an der Rückenlehne arretiert.As in Fig. 4 It can be seen that the insertion pins 414 are quasi T-shaped in a horizontal cross section and each comprise a head section 4142 and a neck section 4141. To mount the actuator 4 on the backrest 2, the insertion pins 414 are inserted into the insertion areas 2221 of the insertion openings 222 of the support arm sockets 22 pushes in. For this purpose, the arm sections 41 have to be bent. The head sections 4142 are thus arranged in the interior of the support arm mounts 22 and the neck sections 4141 extend outward through the insertion openings 222. The actuator 4 is then pushed upwards until the neck sections 4141 of the insertion pins 414 of the arm sections 41 are located in the fixing areas 2222 of the insertion openings 222 of the support arms 22. The head sections 4142 are still arranged in the interior of the support arms 22 and, due to their size, they cannot reach the outside through the fixing areas 2222 of the insertion openings 222. The arm sections 41 of the actuator are thus fixed to the support arm sockets 22 of the backrest 2. At the same time, the locking pins 415 of the arm sections 41 are also snapped into the locking openings 223 of the support arm frames 22. As a result, a downward displacement of the actuator 4 is blocked or blocked and the actuator 4 is fixed in place on the backrest.

In der in der Fig. 3 und der Fig. 4 gezeigten unteren Blockierstellung greifen die Eingreifnasen 413 der Armabschnitte 41 des Stellorgans 4 durch die Eingreiföffnungen 221 der Tragarmfassungen 22 der Rückenlehne 2 hindurch in die Zahnreihen 311 der Tragarme 31 des Lehnenträgers 3. Insbesondere sind dabei die Eingreifnasen 413 jeweils in der Lücke zwischen den untersten beiden Zähnen 312 angeordnet. Die Rückenlehne 2 befindet sich so in einer untersten Position am Lehnenträger 3. Eine vertikale Bewegung der Rückenlehne 2 relativ zum Lehnenträger 3 ist durch das Stellorgan 4 blockiert.In the in the Fig. 3 and the Fig. 4 In the lower blocking position shown, the engaging lugs 413 of the arm sections 41 of the actuator 4 engage through the engaging openings 221 of the support arm sockets 22 of the backrest 2 into the rows of teeth 311 of the support arms 31 of the backrest support 3. In particular, the engaging lugs 413 are each in the gap between the lowermost two teeth 312 arranged. The backrest 2 is thus in a lowermost 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.

Fig. 5 zeigt die Lehnenträgereinrichtung 1 beziehungsweise ihr Stellorgan 4 in einer Bewegungsstellung. Der Greifabschnitt 42 ist manuell von den Tragarmfassungen 22 der Rückenlehne 2 weggezogen. Da die Armabschnitte 41 des Stellorgans 4 wie oben beschrieben fixiert an den Tragarmfassungen 22 arretiert sind, wird das Stellorgan 4 elastisch nach links gebogen. Dabei werden die Eingreifnasen 413 ausser Eingriff mit den Zahnreihen 311 der Tragarme 31 des Lehnenträgers 3 gebracht. Die Tragarmfassungen 22 können nun in vertikaler Richtung entlang der Tragarme 31 bewegt werden. Dadurch kann sich die ganze Rückenlehne 2 relativ zum Lehnenträger 3 vertikal verschieben und eine Höhenlage der Rückenlehne 2 kann eingestellt werden. Die oberen Endbereiche der Tragarme 31 sind so dimensioniert, dass die Tragarmfassungen 22 nicht nach oben vom Lehneträger 3 abgehoben werden können. Fig. 5 shows the backrest support device 1 or its actuator 4 in a moving position. The gripping section 42 is manually pulled away from the support arm sockets 22 of the backrest 2. Since the arm sections 41 of the actuator 4 are fixed to the support arm mounts 22 as described above, the actuator becomes 4 elastically bent to the left. The engaging lugs 413 are brought out of engagement with the rows of teeth 311 of the support arms 31 of the backrest support 3. The support arm sockets 22 can now be moved in the vertical direction along the support arms 31. As a result, the entire backrest 2 can move vertically relative to the backrest support 3 and a height position of the backrest 2 can be adjusted. The upper end regions of the support arms 31 are dimensioned such that the support arm frames 22 cannot be lifted up from the backrest support 3.

Wie in Fig. 4 und Fig. 5 ersichtlich begrenzt ein unterer Querbalken des Rahmens 21 der Rückenlehne 2 eine Bewegung beziehungsweise Biegung des Stellorgans 4. Insbesondere schlägt der Greifabschnitt 42 an den Querbalken an, wenn er in einem vordefinierten Umfang aus der Blockierstellung bewegt ist. Der Querbalken bildet so zusammen mit dem Greifabschnitt 42 eine Bewegungsbegrenzung der Sperrung. Zudem überragen die Vorsprünge 313 jeweils die Zähne 312 der zugehörigen Zahnreihe 311 nach links beziehungsweise soweit, dass das zugehörige Eingreifstück 413 des Stellorgans 4 daran anschlägt, wenn die Rückenlehne 2 in der Freistellung nach oben bewegt wird. So wird erreicht, dass die Eingreifstücke 413 jeweils bis an eine vordefinierte Stelle beziehungsweise Position aus der zugehörigen Rastreihe 311 gezogen werden können, in der sie ausreichend weit nach links bewegt sind, dass sie die zugehörige Zahnreihe 311 passieren können aber nicht den zugehörigen Vorsprung 313. Die Rückenlehne 2 ist also mittels der Sperrung am Lehnenträger 3 gesichert und kann nicht unbeabsichtigt von diesem entfernt werden.As in Fig. 4 and Fig. 5 as can be seen, a lower crossbeam of the frame 21 of the backrest 2 limits movement or bending of the actuating member 4. In particular, the gripping section 42 strikes the crossbeam when it is moved out of the blocking position to a predefined extent. The crossbar thus forms, together with the gripping section 42, a limitation of the movement of the blocking. In addition, the projections 313 each project beyond the teeth 312 of the associated row of teeth 311 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. It is thus achieved that the engaging pieces 413 can each be pulled up to a predefined point or position from the associated latching row 311, in which they are moved sufficiently far to the left that they can pass through the associated tooth row 311 but not the associated projection 313. The backrest 2 is thus secured by means of the lock on the backrest support 3 and cannot be inadvertently removed from it.

In Fig. 6 ist die Lehnenträgereinrichtung 1 in einer oberen Blockierstellung gezeigt. Dabei ist der Greifabschnitt 42 des Stellorgans 4 wieder losgelassen, sodass aufgrund der Eigenelastizität des Stellorgans 4 die Armabschnitte 41 wieder an den Tragarmfassungen 22 anliegen. Die Eingreifnasen 413 der Armabschnitte 41 greifen durch die Eingreiföffnungen 221 der Tragarmfassungen 22 hindurch in die Zahnreihen 311 der Tragarme 31 des Lehnenträgers 3. Insbesondere sind dabei die Eingreifnasen 413 jeweils in der Lücke zwischen den obersten beiden Zähnen 312 angeordnet. Die Rückenlehne 2 befindet sich so in einer obersten Position am Lehnenträger 3. Eine vertikale Bewegung der Rückenlehne 2 relativ zum Lehnenträger 3 ist durch das Stellorgan 4 blockiert.In Fig. 6 the backrest support device 1 is shown in an upper blocking position. The gripping section 42 of the actuator 4 is released again, so that the arm sections 41 rest against the support arm sockets 22 again due to the inherent elasticity of the actuator 4. The engaging lugs 413 of the arm sections 41 engage through the engaging openings 221 of the support arm frames 22 into the rows of teeth 311 of the support arms 31 of the backrest support 3. In particular, the engaging lugs 413 are each arranged in the gap between the uppermost 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.

Obwohl die Erfindung mittels der Figuren und der zugehörigen Beschreibung dargestellt und detailliert beschrieben ist, sind diese Darstellung und diese detaillierte Beschreibung illustrativ und beispielhaft zu verstehen und nicht als die Erfindung einschränkend. Um die Erfindung nicht zu verklären, können in gewissen Fällen wohlbekannte Strukturen und Techniken nicht im Detail gezeigt und beschrieben sein. Es versteht sich, dass Fachleute Änderungen und Abwandlungen machen können, ohne den Umfang der folgenden Ansprüche zu verlassen. Insbesondere deckt die vorliegende Erfindung weitere Ausführungsbeispiele mit irgendwelchen Kombinationen von Merkmalen ab, die von den explizit beschriebenen Merkmalskombinationen abweichen können.Although the invention is illustrated and described in detail by means of the figures and the associated description, this illustration and this are detailed The description is to be understood in an illustrative and exemplary manner and is not restrictive of the invention. In order not to clarify the invention, in certain cases well-known structures and techniques cannot be shown and described in detail. It is understood that those skilled in the art can make changes and modifications without departing from the scope of the following claims. In particular, the present invention covers further exemplary embodiments with any combinations of features that may differ from the combinations of features explicitly described.

Die vorliegende Offenbarung umfasst auch Ausführungsformen mit jeglicher Kombination von Merkmalen, die vorstehend oder nachfolgend zu verschiedenen Ausführungsformen genannt oder gezeigt sind. Sie umfasst ebenfalls einzelne Merkmale in den Figuren, auch wenn sie dort im Zusammenhang mit anderen Merkmalen gezeigt sind und/oder vorstehend oder nachfolgend nicht genannt sind. Auch können die in den Figuren und der Beschreibung beschriebenen Alternativen von Ausführungsformen und einzelne Alternativen deren Merkmale vom Erfindungsgegenstand beziehungsweise von den offenbarten Gegenständen ausgeschlossen sein. Die Offenbarung umfasst Ausführungsformen, die ausschliesslich die in den Ansprüchen beziehungsweise in den Ausführungsbeispielen beschriebenen Merkmale umfasst sowie auch solche, die zusätzliche andere Merkmale umfassen.The present disclosure also includes embodiments with any combination of features mentioned or shown above or below regarding various embodiments. It also includes individual features in the figures, even if they are shown there in connection with other features and / or are not mentioned above or below. The alternatives of embodiments and individual alternatives whose characteristics described in the figures and the description can be excluded from the subject matter of the invention or from the disclosed objects. The disclosure includes embodiments that exclusively include the features described in the claims or in the exemplary embodiments, and also those that include additional other features.

Im Weiteren schliesst der Ausdruck "umfassen" und Ableitungen davon andere Elemente oder Schritte nicht aus. Ebenfalls schliesst der unbestimmte Artikel "ein" bzw. "eine" und Ableitungen davon eine Vielzahl nicht aus. Die Funktionen mehrerer in den Ansprüchen aufgeführter Merkmale können durch eine Einheit beziehungsweise einen Schritt erfüllt sein. Die Begriffe "im Wesentlichen", "etwa", "ungefähr" und dergleichen in Verbindung mit einer Eigenschaft beziehungsweise einem Wert definieren insbesondere auch genau die Eigenschaft beziehungsweise genau den Wert. Die Begriffe "etwa" und "ungefähr" im Zusammenhang mit einem gegebenen Zahlenwert oder -bereich kann sich auf einen Wert beziehungsweise Bereich beziehen, der innerhalb 20%, innerhalb 10%, innerhalb 5% oder innerhalb 2% des gegebenen Werts beziehungsweise Bereichs liegt.Furthermore, the term "comprise" and derivatives thereof do not exclude other elements or steps. Likewise, the indefinite article "a" or "an" and derivatives thereof do not exclude a large number. The functions of several features listed in the claims can be fulfilled by a unit or a step. The terms “essentially”, “approximately”, “approximately” and the like in connection with a property or a value also define precisely the property or exactly the value. The terms "about" and "approximately" in the context of a given numerical value or range can refer to a value or range which lies within 20%, within 10%, within 5% or within 2% of the given value or range.

Claims (15)

  1. Backrest device (1) for an item of furniture for seating and in particular an office chair, which device has a backrest support (3) that comprises a support arm (31), a backrest (2) mounted on the support arm (31) and an adjusting element (4) which is adjustable between a blocking position and a movement position, the support arm (31) of the backrest support (3) being equipped with a latching row (311), the adjusting element (4) being connected to the backrest (2) and having an engagement piece (413), the engagement piece (413) of the adjusting element (4), in the blocking position, engaging in the latching row (311) of the support arm (31) of the backrest support (3) such that movement of the backrest (2) along the support arm (31) of the backrest support (3) is blocked, and, the engagement piece (413) of the adjusting element (4), in the movement position, being disengaged from the latching row (311) of the support arm (31) of the backrest support (3) such that the backrest (2) can move along the support arm (31) of the backrest support (3), characterized in that the adjusting element (4) is made in one piece from an elastic material, said adjusting element being elastically deformed by a force in the movement position such that the engagement piece (413) of the adjusting element (4) is moved out of the latching row (311) of the support arm (31) of the backrest support (3).
  2. Backrest device (1) according to claim 1, wherein the backrest (2) has a support-arm holder (22), the backrest (2) being mounted on the backrest support (3) by the support arm (31) of the backrest support (3) being supported in the support-arm holder (22) of the backrest (2).
  3. Backrest device (1) according to either claim 1 or claim 2, wherein the backrest support (3) is equipped with a further support arm (31) on which the backrest (2) is mounted, the further support arm (31) being equipped with a further latching row (311), the adjusting element (4) having a further engagement piece (413), the further engagement piece (413) of the adjusting element (4), in the blocking position, engaging in the further latching row (311) of the further support arm (31) of the backrest support (3), the further engagement piece (413) of the adjusting element (4), in the movement position, being disengaged from the further latching row (311) of the further support arm (31) of the backrest support (3), and the adjusting element (4), in the movement position, being elastically deformed by the force such that the further engagement piece (413) of the adjusting element (4) is pulled out of the further latching row (311) of the further support arm (31) of the backrest support (3).
  4. Backrest device (1) according to claims 2 and 3, wherein the backrest (2) has a further support-arm holder (22), the further support arm (31) of the backrest support (3) being supported in the further support-arm holder (22) of the backrest (2).
  5. Backrest device (1) according to any of the preceding claims, wherein the adjusting element (4) has a grip portion (42) for manually operating the adjusting element (4).
  6. Backrest device (1) according to any of claims 3 to 5, wherein the adjusting element (4) comprises two arm portions (41), on each of which one of the engagement piece (413) and the further engagement piece (413) is arranged.
  7. Backrest device (1) according to claims 5 and 6, wherein the grip portion (42) of the adjusting element (4) interconnects the two arm portions (41) thereof.
  8. Backrest device (1) according to either claim 6 or claim 7, wherein the arm portions (41) of the adjusting element (4) each have a first longitudinal end (411) and a second longitudinal end (412), each of the arm portions (41), in the region of the first longitudinal end (411) thereof, being secured to the backrest (2) and, in the region of the second longitudinal end (412) thereof, having one of the engagement piece (413) and the further engagement piece (413).
  9. Backrest device (1) according to claim 8, wherein the arm portions (41) of the adjusting element (4) each comprise, at the first longitudinal ends (411), a securing structure having an insertion pin (414) which is quasi-T-shaped in cross section and a locking pin (415), and wherein the backrest (2) has two insertion openings (222), each associated with one of the insertion pins (414) and having an insertion region (2221) and a securing region (2222), and two locking openings (223), each associated with one of the locking pins (415).
  10. Backrest device (1) according to claim 9, wherein the insertion openings (222) in the backrest (2) are dimensioned in the insertion region (2221) such that the insertion pins (414) of the securing structure of the arm portions (41) of the adjusting element (4) pass through, and are dimensioned in the securing region (2222) such that neck portions (4141) of the insertion pins (414) of the securing structure of the arm portions (41) of the adjusting element (4) pass through and head portions (4142) of the insertion pins (414) of the arm portions (41) of the adjusting element (4) do not pass through.
  11. Backrest device (1) according to claim 10, wherein the locking pins (415) of the securing structure of the adjusting element (4) are arranged in the locking openings (223) when the insertion pins (414) of the securing structure of the adjusting element (4) are arranged in the securing regions (2222) of the insertion openings (222) in the backrest (2), and wherein the locking pins (415) of the securing structure of the adjusting element (4) are arranged outside the locking openings (223) when the insertion pins (414) of the securing structure of the adjusting element (4) are arranged in the insertion regions (2221) of the insertion openings (222) in the backrest (2).
  12. Backrest device (1) according to any of the preceding claims, wherein the support-arm holder (22) of the backrest (2) is quasi-sleeve-shaped, the support arm (31) of the backrest support (3) being inserted into the support-arm holder (22) of the backrest (2).
  13. Backrest device (1) according to claim 12, wherein the latching row (311) of the support arm (31) of the backrest support (3) is located inside the support-arm holder (22), the support-arm holder (22) of the backrest (2) having an engagement opening (221) formed adjacent to the latching row (311) of the support arm (31) of the backrest support (3), and the adjusting element (4) being mounted on the support-arm holder (22) of the backrest (2) such that the engagement piece (413) of the adjusting element (4), in the blocking position, extends through the engagement opening (221) in the support-arm holder (22) of the backrest (2).
  14. Backrest device (1) according to any of the preceding claims, wherein the adjusting element (4) is made of a plastics material.
  15. Backrest device (1) according to any of the preceding claims, which has a lock (21, 313, 413, 42) which prevents the backrest (2) from being removed from the backrest support (3) when the adjusting element (4) is in the movement position.
EP17784296.0A 2016-10-18 2017-10-17 Backrest device Active EP3528666B1 (en)

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 EP3528666A1 (en) 2019-08-28
EP3528666B1 true 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)

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JPS6182452U (en) * 1984-11-06 1986-05-31
EP2721962A1 (en) * 2012-10-22 2014-04-23 Sedus Stoll AG Dorsokinetic backrest of a seat, seating furniture

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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
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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
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JPS6182452U (en) * 1984-11-06 1986-05-31
EP2721962A1 (en) * 2012-10-22 2014-04-23 Sedus Stoll AG Dorsokinetic backrest of a seat, seating furniture

Also Published As

Publication number Publication date
EP3311704A1 (en) 2018-04-25
EP3528666A1 (en) 2019-08-28
WO2018073223A1 (en) 2018-04-26
US20200037766A1 (en) 2020-02-06
US11051623B2 (en) 2021-07-06

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