DE102017107851B4 - Device for height adjustment of a headrest provided for a chair - Google Patents

Abstract

Device for height adjustment of a headrest (3) provided for a chair, which is mounted on a backrest frame (2) in such a way that the headrest (3) can be moved up and down with respect to the backrest frame (2) and therefore into a desired position The device (1) comprises: a sliding element (10), which is designed in the form of an elongated component and extends in a vertical direction up and down, the sliding element (10) having a connecting section (11) on the head side. to which the headrest (3) is connected, an inwardly curved surface (12) being formed on a front side (10a) and a first toothed rail (13) on a side wall of the inwardly curved surface (12) is formed in a vertical direction, a fastening element (20) having a front seat (21) and a rear cover (22) and detachably attached to the backrest frame (2), wobe i the front seat (21) has a first sliding slot (23) which faces the sliding element (10), and wherein on one side wall of the first sliding slot (23) an opening (24) serving to receive the push button is formed, which with the corresponds to the first toothed rail (13) of the sliding element (10), and wherein the rear cover (22) has a second sliding slot (25) which faces the sliding element (10), and wherein the sliding element (10) is arranged such that it is slidably held between the first slide slot (23) of the front seat (21) and the second slide slot (25) of the rear cover (22), and a push button (30) which is elastically movable in the opening (24) for receiving the push button The push button (30) has a pressing section (31) which projects beyond a front seat (21) of the fastening element (20) and is used for pressure actuation, a projecting actuating section (32) which is integral with one r side of the pressing section (31) is formed and extends in a direction that faces the opening (24) for receiving the push button of the fastening element (20), a toothed rail (33) arranged in a vertical direction, which is integral with one Side of the protruding actuating section (32) and is in engagement with the first toothed rail (13) of the sliding element (10) or is separated therefrom, and at least one spring section (34) which provides a restoring force for the depressed push button (30) provides, wherein the toothed rail (33) of the push button (30), when the push button (30) is pressed into the opening (24) for receiving the push button, by its displacement from the first toothed rail (13) of the sliding element (10 ) is separated, which enables the sliding element (10) to be moved up and down with respect to the fastening element (20) to move a position of the headrest (3) in the ve rical direction up or down, wherein when the push button (30) is released after the sliding member (10) is placed in a new position, the push button (30) by means of a spring force generated by the at least one spring portion (34) returns to its initial position, the toothed rail (33) of the push button (30) returning to its initial position and engaging in a new position of the first toothed rail (13) of the sliding element (10), whereby the sliding element (10) and the headrest (3) are fixed in the newly set position.

Description

The invention relates to a device for adjusting the height of a headrest, in particular a device for adjusting the height of a headrest provided for a chair. a. comprises a sliding element, a fastening element and a push button.

In the design of a modern chair, great emphasis is currently placed on the seating comfort and comfort functions of the chair, with a majority of the functional devices being specifically supplemented on an armrest, a lumbar support or a headrest in order to provide various comfort functions, such as. B. to realize a horizontal adjustability of the armrest to the front and back or to the left and right or a height adjustability of the lumbar support or headrest.

With a conventional height adjustment for a headrest, however, it is disadvantageous that a relatively large force is exerted directly on the headrest in order to move the headrest up or down, which usually causes not only a loud noise but also a larger one Power requires, so that the appropriate handling for seniors, teenagers, women and children is very cumbersome.

Although the inventor of the present application has created some solutions in the technical field of armrests due to his creative achievement and the patents with the file number TW I580 381 B, CN 2 05 696 735 U . US 2017/0 318 966 A1 . DE 20 2016 101 985 U1 has acquired, in which a push button actuation and a damping gear have already been used, the objects of the patents mentioned are not suitable for a headrest, however, because a movement element used and a fastening element are arranged differently and therefore have a different working principle. In addition, the inventor has the applications with the application numbers in the technical field of headrests CN 107 865 537 A. and US 2018/0 103 765 A1 The structures disclosed therein are also unsuitable for the headrest mentioned here, because the headrests presented in the applications mentioned have structural features which differ significantly from the headrest mentioned here. The inventor has therefore set himself the task of creating a device in order to specifically eliminate the above-mentioned disadvantages of conventional technology.

From the publication US 4,660,885 A an adjustment mechanism for the gradual height adjustment of the backrest of a work chair is known which comprises two U-shaped guide rails for receiving the side edges of a rectangular support arm which extends upwards from the seat surface of the chair.

Furthermore is from the publication US 2006/0 226 684 A1 a distance adjustment device for a chair is known which has a guide rail, a movable plate slidably mounted on the guide rail, a movable handle pivotally attached to the movable plate, which has a first end which is detachably connected to the guide rail and has a fixed handle, which is mounted on the movable plate and is opposite a second end of the movable handle.

From the publication US 8 662 591 B2 a chair is known which contains at least one leg, a rotatable seat, a backrest and a headrest which includes a clamping element which has a yoke with two hollow cylindrical yoke arms.

The invention has for its object to provide a device for height adjustment of a headrest provided for a chair, so that a user can adjust the headrest up or down to a desired position by a simple and easy handling, the height adjustment with a low resistance and can be carried out quietly.

This object is achieved according to the invention by a device for height adjustment of a headrest provided for a chair, which has the features specified in claim 1. Further advantageous developments of the invention emerge from the subclaims.

• ein Gleitelement, das in Form eines länglichen Bauteils ausgeführt ist und sich in einer vertikalen Richtung nach oben und unten erstreckt, wobei das Gleitelement kopfseitig einen Verbindungsabschnitt aufweist, mit dem die Kopfstütze verbunden ist, wobei an einer vorderen Seite eine nach innen gewölbte Fläche ausgebildet ist, und wobei an einer Seitenwand der nach innen gewölbten Fläche eine erste Zahnschiene in einer vertikalen Richtung ausgebildet ist,
• ein Befestigungselement, das einen Vordersitz und einen hinteren Deckel umfasst und lösbar an dem Rückenlehnenrahmen angebracht ist, wobei der Vordersitz einen ersten Gleitschlitz aufweist, der dem Gleitelement zugewandt angeordnet ist, und wobei an einer Seitenwand des ersten Gleitschlitzes eine zur Aufnahme eines Druckknopfes dienende Öffnung ausgebildet ist, die mit der ersten Zahnschiene des Gleitelementes korrespondiert, und wobei der hintere Deckel einen zweiten Gleitschlitz aufweist, der dem Gleitelement zugewandt angeordnet ist, und wobei das Gleitelement so angeordnet ist, dass es gleitend verschiebbar zwischen dem ersten Gleitschlitz des Vordersitzes und dem zweiten Gleitschlitz des hinteren Deckels gehalten wird, und
• einen Druckknopf, der elastisch bewegbar in der zur Aufnahme des Druckknopfes dienenden Öffnung gelagert ist, wobei der Druckknopf einen über einen Vordersitz des Befestigungselements hinausragenden Andrückabschnitt, der zur Druckbetätigung dient, einen vorstehenden Betätigungsabschnitt, der integral an einer Seite des Andrückabschnitts ausgebildet ist und sich in einer Richtung erstreckt, welche der zur Aufnahme des Druckknopfes dienenden Öffnung des Befestigungselements zugewandt ist, eine in einer vertikalen Richtung angeordnete Zahnschiene, die integral an einer Seite des vorstehenden Betätigungsabschnitts ausgebildet ist und mit der ersten Zahnschiene des Gleitelementes in Eingriff steht bzw. davon getrennt werden kann, und mindestens einen Federabschnitt umfasst, der eine Rückstellkraft für den gedrückten Druckknopf bereitstellt.

According to the invention, there is provided a device for height adjustment of a headrest provided for a chair, which is mounted on a backrest frame such that the headrest can be moved up and down relative to the backrest frame and can therefore be adjusted to a desired position, the device has the following components:

• a sliding member which is in the form of an elongated member and extends in a vertical direction up and down, the sliding member having a connection portion to the head side to which the headrest is connected, an inwardly curved surface is formed on a front side , and wherein a first toothed rail is formed in a vertical direction on a side wall of the inwardly curved surface,
• a fastener that includes a front seat and a rear cover and releasably attached is attached to the backrest frame, the front seat having a first sliding slot which is arranged facing the sliding element, and wherein an opening for receiving a push button is formed on a side wall of the first sliding slot, which corresponds to the first toothed rail of the sliding element, and wherein rear cover has a second sliding slot, which is arranged facing the sliding element, and wherein the sliding element is arranged such that it is slidably held between the first sliding slot of the front seat and the second sliding slot of the rear cover, and
• a push button, which is elastically movably mounted in the opening serving to receive the push button, the push button a pushing section which projects beyond a front seat of the fastening element and which is used for pushing operation, a projecting operating section which is integrally formed on one side of the pushing section and is in extends in a direction which faces the opening of the fastening element serving to receive the push button, a toothed rail arranged in a vertical direction, which is integrally formed on one side of the protruding actuating section and is in engagement with or separated from the first toothed rail of the sliding element can, and comprises at least one spring section, which provides a restoring force for the depressed push button.

When the push button is pushed into the opening for receiving the push button, the toothed rail of the push button is displaced and thereby separated from the first toothed rail of the sliding element, which enables the sliding element to be moved up and down with respect to the fastening element by the Adjust the headrest position in a vertical direction up or down. If the push button is released after the sliding element has been brought into a new position, the push button returns to its starting position by means of a spring force generated by the at least one spring section, the toothed rail of the push button returning to its starting position and into a new position at the first Toothed rail of the sliding element engages so that the sliding element can no longer be moved up and down with respect to the fastening element, as a result of which the headrest is fixed in its newly adjusted position.

• 1 eine perspektivische Zusammenbaudarstellung eines Ausführungsbeispiels einer erfindungsgemäßen Kopfstütze (von hinten gesehen), die in einer bestimmten Position befestigt ist,
• 2 eine perspektivische Zusammenbaudarstellung des Ausführungsbeispiels einer erfindungsgemäßen Kopfstütze, die in eine höhere Position verschoben ist,
• 3 eine perspektivische Explosionsdarstellung des Ausführungsbeispiels einer erfindungsgemäßen Kopfstütze (von vorne gesehen),
• 4 eine perspektivische Explosionsdarstellung der Teilkonstruktion der erfindungsgemäßen Kopfstütze aus 3,
• 5 eine schematische Darstellung eines erfindungsgemäßen Gleitelements im befestigten Zustand,
• 6 eine schematische Darstellung des in 5 gezeigten erfindungsgemäßen Gleitelements im verschobenen Zustand,
• 7 eine perspektivische Darstellung des Ausführungsbeispiels der erfindungsgemäßen Kopfstütze (von vorne gesehen), die am Rückenlehnenrahmen angebracht ist, und
• 8 eine perspektivische Darstellung eines weiteren Ausführungsbeispiels der erfindungsgemäßen Kopfstütze (von vorne gesehen), die am Rückenlehnenrahmen angebracht ist.

The invention and its embodiments are explained in more detail below with reference to the drawings. In the drawings shows

• 1 2 shows a perspective assembly illustration of an exemplary embodiment of a headrest according to the invention (seen from behind) which is fastened in a specific position,
• 2 2 shows a perspective assembly illustration of the exemplary embodiment of a headrest according to the invention, which is shifted into a higher position,
• 3 2 shows a perspective exploded view of the exemplary embodiment of a headrest according to the invention (seen from the front),
• 4 a perspective exploded view of the partial construction of the headrest according to the invention 3 .
• 5 1 shows a schematic illustration of a sliding element according to the invention in the fastened state,
• 6 a schematic representation of the in 5 shown sliding element according to the invention in the shifted state,
• 7 a perspective view of the embodiment of the headrest according to the invention (seen from the front), which is attached to the backrest frame, and
• 8th a perspective view of another embodiment of the headrest according to the invention (seen from the front), which is attached to the backrest frame.

How from 1 to 8th can be seen is an inventive for height adjustment of a headrest provided for a chair 3 serving device 1 like this on a backrest frame 2 attached that the headrest 3 in relation to the backrest frame 2 or the backrest can be moved up and down and can therefore be adjusted to a desired position, the device according to the invention 1 including a sliding element 10 , a fastener 20 and a push button 30 includes.

The sliding element 10 is an elongated member that extends up and down in a vertical direction, with the sliding member 10 a connection section at the head 11 with which the headrest 3 connected is. On a front side 10a is a curved surface 12 educated. On a side wall of the inwardly curved surface 12 is a first dental splint 13 formed which has a certain length in a vertical direction to a range of movement of the headrest 3 to define up and down as it is in 3 and 4 is shown, the first toothed splint 13 in 3 and 4 is arranged on the right side wall, to which the present invention is not to be limited in any way. How in 1 and 2 is shown, comprises the sliding element 10 an elongated straight section and an elongated arc section, which are not shown in the drawings.

The fastener 20 The assembly of which is explained below includes a front seat 21 and a rear lid 22 and becomes detachable on the backrest frame 2 attached, the front seat 21 and the back cover 22 be joined together at the front and back. In the front seat 21 is a first sliding slot 23 formed, which is curved inwards and the sliding element 10 is facing. On a side wall of the first sliding slot 23 is an opening for receiving the push button 24 trained with the first dental splint 13 of the sliding element 10 corresponds, the opening serving to receive the push button 24 in 3 and 4 is arranged on the right side wall, but the present invention is not intended to be limited thereto. The back cover 22 includes a second sliding slot 25 that arched inwards and the sliding element 10 is facing. The sliding element 10 is attached so that it is between the first sliding slot 23 of the front seat 21 and the second sliding slot 25 of the rear cover 22 is held and in a direction indicated by the arrow A in 2 . 6 and 8th is called, can slide up and down.

The push button 30 is in the opening used to hold the push button 24 attached that it is elastically movable when actuated during the height adjustment, the push button 30 between the front seat 21 the fastener 20 and the sliding element 10 is held. The push button 30 includes a pressing section 31 , a protruding operating section 32 , a rack in the vertical direction 33 and at least one spring section 34 ,

The pressing section 31 so at the front seat 21 the fastener 20 attached so that it is exposed to the outside, and can be actuated in a direction indicated by the arrow B in 2 . 6 and 8th is called move. The above operating section 32 , which is integral on one side of the pressing section 31 is formed, extends in a direction that to the opening used to receive the push button 24 has. The rack in the vertical direction 33 is integrally so on a side surface of the protruding operating portion 32 trained them the first dental splint 13 of the sliding element 10 facing, and thereby (as it is in 5 is shown) in engagement with the first toothed splint 13 of the sliding element 10 or as it is in 6 is shown from the engagement with the first rack 13 is solved, the at least one spring section 34 ensures that a restoring force for the pressed push button 30 provided.

The at least one spring section comprises in detail 34 of the push button 30 at least one oblique spring leg 35 , to which the present invention should not be limited, however, the spring leg 35 integral to the pressing portion 31 is formed and on the same side as the above operating section 32 is, and with the spring leg 35 at an angle into the opening used to hold the push button 24 the fastener 20 extends and at one on the front seat 21 trained stop 26 to create a pressed state, so that the elastic restoring force for the released push button 30 is increased.

After the sliding element 10 has been moved to a new position during the height adjustment and when the push button 30 is released, the push button 30 using the through the at least one spring section 34 generated restoring force returned to its initial position, this reset in one by the arrow D in 1 . 5 and 7 direction shown is what enables the dental splint 33 of the push button 30 by this return to the newly set position on the sliding element 10 trained, first dental splint 13 engages so that the sliding element 10 is no longer able to relate to the fastener 20 move up or down, causing the headrest 3 is positioned at the newly set position.

On the head side at the protruding actuating section 32 of the push button 30 can also have a first spring attachment end 36 may be provided, but the present invention is not intended to be limited thereto. Accordingly, a second spring attachment end 27 at one point of the fastener 20 attached opposite the first spring attachment end 36 lies. Between the first and second spring attachment ends 36 . 27 becomes a compression spring 37 built in to provide a resilient return force for the pressed push button 30 provide. In this sense, the compression spring 37 also as a component of the above-mentioned at least one spring section 24 to be viewed as.

Will the push button 30 when actuated in one by the arrow B in 2 . 6 and 8th shown direction in the opening for receiving the push button 24 pressed, the at least one spring section 34 compressed and deformed, the dental splint 33 of the push button 30 from the first tooth splint 13 of the sliding element 10 is separated so that the sliding element 10 in terms of the fastener 20 in one by the arrow A in 2 . 6 and 8th direction shown up and down and can be placed in a desired position.

On one side wall, that of the first dental splint 13 of the sliding element 10 is a second dental splint 14 attached, the second rack 14 in 3 and 4 is arranged on the left side wall, the present invention is in no way to be limited thereto. In the first sliding slot 23 the fastener 20 is a gear storage room 28 provided on a side wall opposite the opening used to receive the push button 24 is, the present invention is also not intended to be limited thereto, wherein a damping gear 40 with a damped rotary motion in the gear receiving space 28 is appropriate. As in 4 to 6 is shown are the second rack 14 on the sliding element 10 and the damping gear 40 interlocked with each other, whereby the sliding element 10 in terms of the fastener 20 in a direction that is indicated by arrow A in 2 . 6 and 8th is displayed, can be slid up and down, the second rack 14 of the sliding element 10 into the damping gear 40 engages and moves in a direction that is indicated by the arrow C in 6 is shown sliding up and down, which allows the sliding element 10 achieves a stable, smooth damping effect and quiet operation when sliding up or down.

In addition, the fastener 20 when mounting with an upper fastening hook 50 and a lower fastening hook 60 connect as it is in 7 and 8th is shown so that the backrest frame 2 doing this between the upper fastening hook 50 and the lower fastening hook 60 is clamped, which allows the headrest 3 above the backrest frame 2 is attached. The design of the lower fastening hook 60 is not limited to any shape or size and can therefore depend on the shape or size of an existing backrest frame 2 be designed with the lower fastening hook 60 for example, either in the form of an in 7 shown fastening hook 60a with a long hook or in the form of an in 8th shown fastening hook 60b can be listed with a short hook, which enables the device according to the invention for adjusting the height of a headrest 1 for different backrest frames 2 suitable.

1. 1. Wenn der Druckknopf 30 gedrückt wird, kann der Benutzer durch eine einfache und leichte Handhabung die Kopfstütze nach oben oder unten bewegen und in eine gewünschte Position (Höhe) stellen. Wird der Druckknopf 30 betätigt, kann die Kopfstütze 3 somit leicht in eine neue Position verstellt werden. Wird der Druckknopf 30 bei der Höhenverstellung freigegeben, wird die Kopfstütze 3 in der neu eingestellten Position positioniert, wodurch eine einfache Handhabung realisiert wird.
2. 2. Wenn das Gleitelement 10 in dem Befestigungselement 20 nach oben oder unten gleitet, greift die zweite Zahnschiene 14 des Gleitelementes 10 gleichzeitig in das Dämpfungszahnrad 40 des Befestigungselementes 20 ein, sodass die Gleitbewegung durch das Dämpfungszahnrad 40 gesteuert wird, was nicht nur eine stabile und reibungslose Dämpfungswirkung, sondern auch einen geräuscharmen Betrieb ermöglicht.

In comparison to the conventional technology, the device used to adjust the height of the headrest 1 according to the present invention the following advantages:

1. 1. When the push button 30 is pressed, the user can move the headrest up or down and put it in a desired position (height) by simple and easy handling. Will the push button 30 actuated, the headrest 3 can thus be easily moved to a new position. Will the push button 30 when the height adjustment is released, the headrest is released 3 positioned in the newly set position, which makes it easy to use.
2. 2. If the sliding element 10 in the fastener 20 slides up or down, grips the second rack 14 of the sliding element 10 at the same time in the damping gear 40 the fastener 20 so that the sliding movement through the damping gear 40 is controlled, which not only enables a stable and smooth damping effect, but also low-noise operation.

LIST OF REFERENCE NUMBERS

1

Height adjustment device

10

Slide

10a

front side

11

connecting portion

12

curved surface

13

first tooth splint

14

second rack

20

fastener

21

front seat

22

rear cover

23

first sliding slot

24

opening for receiving the push button

25

second sliding slot

26

attack

27

second spring attachment end

28

Gear well

30

push-button

31

pressure application

32

above operating section

33

dental splint

34

spring section

35

spring leg

36

first attachment end

37

compression spring

40

damper gear

50

upper fastening hook

60

lower fastening hook

2

Backrest frame

3

headrest

Claims (7)

Device for height adjustment of a headrest (3) provided for a chair, which is mounted on a backrest frame (2) in such a way that the headrest (3) can be moved up and down with respect to the backrest frame (2) and therefore into a desired position can be adjusted, the device (1) comprising: a sliding element (10), which is designed in the form of an elongate component and extends in a vertical direction upwards and downwards, the sliding element (10) having a connecting section (11) on the head side to which the headrest (3) is connected, an inwardly curved surface (12) is formed on a front side and a first toothed rail (13) is formed in a vertical direction on a side wall of the inwardly curved surface (12), a fastening element (20), which has a front seat (21) and a rear cover (22) and is detachably attached to the backrest frame (2), the front seat (21) having a first sliding slot (23) which the sliding element (10 ), and an opening (24) for receiving the push button is formed on a side wall of the first sliding slot (23), which corresponds to the first toothed rail (13) of the sliding element (10), and wherein the rear cover (22 ) has a second sliding slot (25) which faces the sliding element (10), and wherein the sliding element (10) is arranged such that it is slidably displaceable between the first sliding slot (23) of the front seat (21) and the second sliding slot ( 25) of the rear cover (22) is held, and a push button (30) which is elastically movably mounted in the opening (24) serving to receive the push button, the push button (30) being a pressing section (31) which projects beyond a front seat (21) of the fastening element (20) and which is used to actuate the push button serves, a protruding actuating portion (32) which is integrally formed on one side of the pressing portion (31) and extends in a direction which faces the opening (24) for receiving the push button of the fastening element (20), one in one vertical toothed rail (33) which is integrally formed on one side of the projecting actuating section (32) and which engages with the first toothed rail (13) of the sliding element (10) or is separated therefrom, and at least one spring section (34 ), which provides a restoring force for the pressed push button (30), wherein the toothed rail (33) of the push button (30) when the push button button (30) is pushed into the opening (24) for receiving the push button, is separated by its displacement from the first toothed rail (13) of the sliding element (10), which enables the sliding element (10) in relation to the fastening element (20) is movable up and down to adjust a position of the headrest (3) in the vertical direction up or down, and when the push button (30) is released after the sliding element (10) in a new position is set, the push button (30) returns to its starting position with the aid of a spring force generated by the at least one spring section (34), the toothed rail (33) of the push button (30) returning to its starting position and into a new position of the first toothed rail (13 ) of the sliding element (10) engages, whereby the sliding element (10) and the headrest (3) are fixed in the newly set position. Device after Claim 1 , characterized in that the spring section (34) has at least one inclined spring leg (35) which is integrally formed on the pressing section (31) and extends obliquely into the opening (24) of the fastening element (20) which receives the push button , wherein the spring leg (35) bears against a stop (26) formed on the front seat (21) in order to produce a pressed state. Device after Claim 1 , characterized in that a first spring fastening end (36) is formed on the head side on the projecting actuating section (32) of the push button (30), the fastening element (20) having a spring fastening end (27) arranged opposite the first spring fastening end (36), and wherein a compression spring (37) is installed between the first spring attachment end (36) and the second spring attachment end (27) in order to provide a resilient restoring force for the depressed push button (30). Device after Claim 1 , characterized in that a second toothed rail (14) is formed on a side lying opposite the first toothed rail (13) of the sliding element (10). Device after Claim 4 , characterized in that in the first sliding slot (23) of the fastening element (20) Gear receiving space (28) is formed, in which a damping gear (40) with a damping function is arranged, so that the second toothed rail (14) engages in the damping gear (40) and can slide up and down synchronously with it when the sliding element (10 ) slides up or down. Device after Claim 1 , characterized in that the fastening element (20) can be connected to an upper fastening hook (50) and a lower fastening hook (60) during assembly, which enables the backrest frame (2) to be between the upper fastening hook (50) and the lower fastening hook (60) is clamped so that the fastening element (20) is fastened to the backrest frame (2). Device after Claim 1 , characterized in that the sliding element (10) has an elongated straight section and an elongated arc section.

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