JPH0443081Y2 - - Google Patents

Description

[Detailed description of the invention] Technical field The present invention relates to a carrying device for a tilt-adjustable backrest and a tilt-adjustable support plate of a height-adjustable chair seat, and more specifically to a support plate for a tilt-adjustable backrest and a height-adjustable chair seat. a possible seat gas spring is pivotally connected to the support device and the support plate, and a length-adjustable backrest gas spring is pivotally connected to the support device and the backrest and is formed by a length-adjustable gas spring. The chair support is likewise connected to the carrier device, the actuating pins of the seat gas spring and the backrest gas spring facing each other and in each case adjoining an intermediate lever, which intermediate levers are arranged in an approximately horizontal guide track. and these intermediate levers can be locked in a deflected position such that the respective operating pin enters the seat gas spring or the backrest gas spring, and the chair support of,
An operating pin which can be operated by means of an operating lever is provided for the carrier device, which is provided between the two intermediate levers.

Prior Art German Patent Publication No. 2929428 (European Patent No.
In a carrier device of this kind, known from Publication No. 0022933), a link arrangement with various guide symbols is provided as a guide track. With various guide tracks it is possible to forcefully guide the operating lever and fix it in one deflection position. For example, on one guide track, the actuating lever can be pivoted horizontally in one direction or the other. As a result, the actuating pin of the bell spring moves into the gas spring.
Therefore, the inclination state of the seat and the inclination state of the backrest can be changed separately. In order to make the seat and the backrest freely tiltable, i.e. to release the lock between the seat and the backrest by means of the corresponding gas spring, the actuating lever is swung upwards in the guide track of the vertical device of the linkage; It can be locked elastically. In this position, corresponding parts of the ring formed on the actuating lever and adjoining the intermediate lever pull the two intermediate levers apart, so that the two actuating pins enter their respective gas springs. Since the operating lever is locked in this position, the operating pin remains open and the seat and backrest can therefore be tilted freely against the gas pressure of the respective gas spring. Since the ring formed on the operating lever surrounds the chair support, the gas spring forming the chair support cannot be adjusted by means of this operating lever. For this reason, separate operating levers are actually provided. Furthermore, it is not possible to lock only the actuating pin of the backrest gas spring or only the actuating pin of the seat gas spring in the entry position.

The chair known from US Pat. No. 3,837,704 is
It has a chair support formed by a length-adjustable gas spring and a backrest whose inclination can also be adjusted using a backrest gas spring. Adjustment of the length of the chair support or of the backrest gas spring, i.e. adjustment of the inclination of the backrest, is only possible using an operating lever that can be pivoted vertically and horizontally. In this case, the inclination of the seat cannot be adjusted.
Also, the operating pin cannot be locked in its entry position.

A similar arrangement is also known from Swiss Patent No. 563753.

Purpose The purpose of the present invention is to provide a simple carrying device in which the operating pins of the backrest gas spring and the seat gas spring can be locked separately.

Structure and Effects In order to achieve the above object, the present invention is provided with a stop lever provided above the chair support, which is capable of elastically contacting the intermediate lever, and which is attached to each intermediate lever. after deflection of each intermediate lever, being located behind the intermediate lever;
The guide track is characterized in that the guide track has a track portion attached to the operating pin of the chair support and extending in the vertical direction in the center thereof.

The technical idea of the invention is that the operating lever itself is not locked in the position in which one or the other operating pin is locked. The operating lever is used only for pivoting the intermediate lever. The intermediate lever is locked by the respective stop lever in the fully deflected position, in which position the actuating pin attached to the gas spring is locked. Such a configuration also makes it possible to use the operating lever to adjust the length of the chair support, since the operating lever is always free. That is,
Even when tilting the backrest gas spring and/or the seat gas spring, the actuating lever can also be used for other functions, for example for adjusting the height of the chair support.

With the configuration described in claim 2 of the utility model registration, in order to adjust the length of the backrest gas spring or the seat gas spring, it is sufficient to simply deflect the operating lever in the horizontal direction. In this case, in order to adjust the length of the operating lever, it is not necessary to deflect the intermediate lever to the extent that it is locked and fixed. Locking is effected by moving the corresponding operating part of the operating lever upwards in the direction of the stop lever.

According to the invention, it is possible to construct the control lever in accordance with claim 3 in a manner known per se.

Embodiments Next, embodiments of the present invention will be described with reference to the accompanying drawings.

A support plate 2 for a seat 3 of an office chair is supported on a carrier device 1 in the form of a housing so as to be tiltable about a pivot axis 4 . Furthermore, a backrest 5 is supported on the carrier device 1 so that its inclination can be adjusted around a pivot axis 6 . The pivot axes 4 and 6 are parallel to each other and extend perpendicular to the main central plane of the office chair. The carrying device 1 is supported on a height-adjustable chair post 7. The support column 7 is formed by a length-adjustable gas spring which is supported in a guide tube which can be connected to the footrest. The structure and operating mode of this commercially available gas spring are illustrated and explained, for example, in German Patent No. 1,812,282 (US Pat. No. 3,656,593). Regarding similarly commercially available struts with guide tubes, for example German Patent No. 1931012
(U.S. Pat. No. 3,711,054). The gas spring used as the support column 7 is provided with a conical retaining portion 8 at its upper end. The holding part 8 is held in a corresponding conical receptacle 9 of the carrier device 1 . The support column 7 projects vertically downwards from the carrier device 1 . From the holding part 8, coaxially to the longitudinal axis 10 of the column 7,
An axially movable operating pin 11 for adjusting the length of the support column 7 projects upward.

The support plate 2 of the seat 3 is pivotable about a pivot axis 4 by means of a seat gas spring 12 . The free end of the piston rod 13 of the seat gas spring 12 is connected to the support plate 2 in its front region, ie on the side facing away from the backrest 5, by a pivot joint 14. The other end of the sheet gas spring 12 is connected to a ball joint 15
It is pivotably connected to the carrier device 1 by. The substantially cylindrical housing 16 of the sheet gas spring 12 is therefore pivotable relative to the carrier device 1, but is not longitudinally movable. The sheet gas spring 7 is adjustable in length and has the same basic structure as the column 7. That is, its structure is the same as the gas spring described in German Patent No. 1,812,282 (US Pat. No. 3,656,593). An operating pin 18 movable in the direction of the longitudinal center axis 17 of the seat gas spring 12 is for adjusting the length of the seat gas spring 12 and extends through the ball and socket joint 15 into the carrier device 1 . protrudes to.

In order to adjust the inclination of the backrest 5, a backrest gas spring 19 is provided. The structure and function of the backrest gas spring 19 are the same as the seat gas spring 12. The backrest gas spring 19 is connected to the backrest at a sufficient distance from the pivot axis 6 by a pivot joint 21 mounted on the free end of its piston rod 20. The cylindrical housing 22 of the backrest gas spring 19 has, on the side opposite to the free end,
It is connected to the carrier device 1 by a ball-and-socket joint 23 in a pivotable but immovable manner in the direction of its own central longitudinal axis 24 . The operating pin 25 for adjusting the length of the backrest gas spring 19 is connected to the supporting device 1.
It protrudes into the inside. The three central longitudinal axes 10, 17 and 24 lie in one common plane which overlaps the main central plane of the office chair already mentioned.

An operating lever 26 is provided to operate the operating pins 11, 18, 25 indirectly or directly. Longitudinal center axis 27 of the operating lever 26
are the three longitudinal central axes 10, 17 and 2.
4, ie substantially perpendicular to the main central plane of the office chair. Therefore, the grip 28 arranged on the free outer end of the operating lever 26
is located on the lower side of the support plate 2 or the seat 3, so that a person sitting on the chair can easily operate the operating lever 26.
The operating lever 26 is supported in the carrier device 1 by a ball-and-socket joint 29 so as to be pivotable in all directions. In order to operate the actuating pins 11, 18, 25 indirectly or directly, the actuating part 30 of the actuating lever 26 projects beyond the ball-and-socket joint 29 into the actuating pin 1. In this way, the operating lever 26
It is supported in the area between the operating pins 11, 18, 25 and the outer end formed by the grip 28.

The operating part 30 has at its free end a guide part 31 which is tapered and guided by a guide track part 32 . The guide track portion 32 is formed substantially horizontally as shown in FIG. 2, and has a track portion 33 in the center. This track portion 33 is attached to the operating pin 11 of the support column 7 and extends downward. Pull the grip 28 upward to move the guide section 31 into the track section 3.
3 by guiding the operating lever 26 into the
When pivoted in a vertical plane from the central position shown in the drawing, the operating part 30 of the operating lever 26 pivots downwards, so that the operating pin 11 enters the column 7 and thus controls the operation inside the column. The valve is about to open. At this time, the length of the support column 7 can be adjusted, and therefore the height of the support plate 2 can be adjusted together with the seat 3.

In the lower region of the carrier device 1 there are intermediate levers 34, 35 on both sides of the receptacle 9, i.e. on both sides of the column 7, more precisely on the side of the actuating pin 18 or 25 of the seat gas spring 12 or the backrest gas spring 19. are arranged mirror-symmetrically. Intermediate levers 34, 35
is pivotably supported around its semicircularly curved ends 36, 37. sheet gas spring 1
The actuating pin 18 or 25 of the gas spring 2 or backrest 19 rests on a contact surface 38, 39 which is provided in the center of the intermediate lever 34, 35 and curves outward with respect to the actuating pin 18 or 25. Since the contact surfaces 38, 39 are curved, no matter which pivot position the seat gas spring 12 or the backrest gas spring 19 occupies, the actuating pin 18 or 25 remains on the contact surface 3.
It touches 8,39. Moreover, no deviation of the operation pin 18 or 25 occurs at any turning position. In this way, the curvature of the contact surfaces 38 and 39
It extends almost concentrically with respect to 3.

The upper free ends of the intermediate levers 34, 35 are formed by stop portions 40, 41 bent inwardly and upwardly from the contact surfaces 38, 39, respectively. Stop part 4
0 and 41 are arranged on both sides of the operating portion 30 in the resting state, and are slightly spaced from the operating lever 26 in the resting state. When the operating lever 26 is pivoted forward or backward relative to the support plate 2 of the seat 3 in a substantially horizontal plane, the operating pin 18 of the seat gas spring 12 is operated and the intermediate lever 34 or the backrest gas spring 19 is rotated. When the operating pin 25 is operated, the intermediate lever 35 pivots outward from a resting state. Therefore, in such an operation, the inclination of the support plate 2 and the seat 3 or the inclination of the backrest 5 can be changed around the pivot axis 4 or 6, respectively. When the operator releases the grip 28, the grip 28 is moved to the intermediate position by the operating pin 18 or 25 via the intermediate lever 34 or 35. At this time, the gas spring valve operated by the operation pin 18 or 25 is closed. The support plate 2 or the backrest 5 is fixed again in the new tilted position. When the operating pin 30 of the operating lever 26 pivots in the horizontal direction, the operating lever 26 is guided by the track portions 42 or 43 of the guide track 32 formed on both sides of the track portion 33 oriented substantially vertically downward. .

Above the operating lever, two
Two stop levers 44, 45 are provided in the carrier device 1. These stop levers 44, 45 are
It is pivotably supported in the carrier device 1 by curved upper outer ends 46, 47. The stop levers 44, 45 are also biased downwardly by a compression spring 48 arranged concentrically with respect to the longitudinal axis 10, so that the stop levers 44, 45
The lower ends 49, 50, which are arranged approximately horizontally and are slightly curved upward, are connected to the stop portion 40 or 41.
is in contact with The intersecting position of both stop levers 44 and 45 is immediately above the operating portion 30 of the operating lever 26.

Intermediate lever 3 attached to seat gas spring 12
When the operating lever 26 is pivoted in a horizontal plane so that the lever 4 pivots by operating the corresponding operating pin 18, the stop lever 4 is rotated by pivoting the intermediate lever 34.
4 is slightly lifted upwards against the compression force of the compression spring 48, so that during the pivoting movement of the operating lever 26, the lower free end 49 of the stop lever 44 becomes the stop part (upper free end) of the intermediate lever 34. 40 and is pressed against it. When only adjusting the length of the sheet gas spring 12,
That is, if only the inclination state of the support plate 2 of the seat 3 is to be adjusted, it may be left as is, but the operation pin 18 may be
In order to lock the seat gas spring 12 in the position where it has entered, that is, to keep the valve in the seat gas spring 12 open at all times, the stop portion 40 of the intermediate lever is inserted into the curved position of the stop lever 44. The operating lever 26 is pivoted horizontally until it engages with the end 49. In this case, the stop lever 44 is pressed downwards by the compression spring 48 and its curved end 49 lies above and behind the stop part 40 of the intermediate lever 34. Similarly, backrest gas spring 1
The actuating pin 25 of 9 advances into the backrest gas spring 19 in order to adjust the inclination of the backrest 5, i.e. is selectively locked in the advanced position, in which the curved lower end 50 of the stop lever 45 moves against the intermediate lever 3.
5 and located behind it (FIG. 4). In order to unlock the intermediate lever 34 or 35, the operating pin 18 or 25 must be
In order to release the lock, the grip 28 of the operating lever 26 is pushed downwards in the central position, thereby causing the operating part 30 to move upwardly against the stop levers 44, 45.
is pushed in the direction of the intersection area. For this purpose, the stop levers 44, 45 are therefore
50 is lifted upwards, so that the operating pin 1
8 or 25 can push the intermediate lever 34 or 35 back into its rest position. Operation lever 2
6 is again brought to a central resting position and held there by an elastic cushion 51 made of foamed polyurethane, for example.

[Brief explanation of the drawing]

FIG. 1 is a side view of the carrying device according to the present invention, showing both the tilt-adjustable chair support plate and the tilt-adjustable backrest; FIG. 2 is a partially enlarged view of the carrying device of FIG. 1; and FIG. The figure is a sectional view taken along the line - in FIG. 2, and FIG. 4 is a view corresponding to FIG. 2, showing a part of the carrier device in an adjusted state. DESCRIPTION OF SYMBOLS 1... Carrying device, 2... Support plate, 3... Sheet, 7... Strut, 11... Strut operation pin, 12
... Seat gas spring, 18 ... Seat gas spring operation pin, 19 ... Backrest gas spring, 25 ...
Backrest gas spring operating pin, 26... Operating lever, 34, 35... Intermediate lever, 44, 45...
Stop lever, 48...compression spring.

Claims (1)

[Claims for Utility Model Registration] (1) A carrier device for a tilt-adjustable backrest and a tilt-adjustable support plate of a height-adjustable chair seat, the seat gas spring having an adjustable length. is pivotally connected to the support device and the support plate, and a length-adjustable backrest gas spring is pivotally connected to the support device and the backrest, and a chair support formed by the length-adjustable gas spring is likewise provided. an actuating device which is connected to the carrying device and in which the actuating pins of the seat gas spring and the backrest gas spring are opposite to each other and abut in each case an intermediate lever, which intermediate lever can be operated in an approximately horizontal guide track; These intermediate levers can be deflected by means of levers, and these intermediate levers can be locked in a deflected position such that the respective actuating pin enters the seat gas spring or the backrest gas spring; In said carrier device, in which an actuating pin which can be operated is provided between the two intermediate levers, each intermediate lever 34, 35
A stop lever 4 is provided above the chair support 7 and is elastically contactable with respect to the intermediate lever.
4, 45 are attached, and the stop levers 44, 45
is located behind the respective intermediate lever 34 or 35 after deflection of said intermediate lever;
A supporting device characterized in that the guide track 32 has a track section 33 attached to the operating pin 11 of the chair support 7 in the center thereof and extending in the vertical direction. (2) The carrying device according to claim 1, characterized in that the stop levers 44, 45 are arranged substantially horizontally above the operating lever 26. (3) Utility model registration claim No. 1, characterized in that the operating lever 26 is formed into a bar shape with an operating portion 30 attached to intermediate levers 34, 35 and the operating pin 11 of the chair support 7. The supporting device according to item 1 or 2. (4) The stop levers 44, 45 are
6, 47 and are arranged to cross each other, and are formed by the upper free ends of the intermediate levers 34, 35 when the operating lever 26 is pivoted in the horizontal direction. The stop portions 40 and 41 are the stop levers 44,
The stop levers 44, 45 engage the lower free ends 49, 50 of the intermediate levers 34, 45.
35. The carrier device according to any one of claims 1 to 3 of the utility model registration claims. (5) The intermediate lever 34,
4. Carrying device according to claim 4, characterized in that a compression spring 48 acting in the direction 35 is adjacent.