DE1959238U - SEAT WITH DEVICE FOR BACKREST ADJUSTMENT. - Google Patents

Description

Utility model registration

"Seat with device for backrest adjustment"

Adjustment possibilities of backrests on chairs, armchairs, mainly on swivel chairs, through which the distance between the backrest and the front edge of the seat can be adjusted, are available in many designs

Among other things, the embodiment is known in which the backrest support is telescopic at its lower end trained support strut is hinged. By lengthening or shortening the telescopic strut, the Position of the backrest support changed. The fixing of the telescopically guided parts of the support strut takes place by clamping or engaging a lock.

The novelty described below and for which protection is pending represents a simple construction of such a device Snap lock, which ensures easy adjustment of the backrest while sitting.

An exemplary embodiment is shown in

Fig. 1 shows a longitudinal section of a swivel chair seat with seat support and the one attached below the seat Backrest adjustment device,

Fig. 2 shows the section A-B of FIG. 1, the here for Protection registered latching lock on a scale of 1: 1,

P.A.561536 * 10/27/66

Mg. 3 the section C-B according to Pig · 2.

In the exemplary embodiment, the seat 9 is fastened to the seat support 10. The seat support 10 is approximately in the middle of the chair column 11 supported. The telescopically adjustable support strut 1, 2 is articulated at point 12 below the seat support 10. At the other end, the support strut 1, 2 is articulated to the backrest support 14 at point 13. Of the Backrest support 14 is in a further joint 15 on rear end of the seat support 10 attached. The parts 1,2 the support strut can be telescoped into one another, which, depending on whether the support strut 1,2 is extended or is shortened, the upper end of the backrest support 14 is adjusted forwards or backwards.

The latching lock registered here for protection consists of the latching slide 4, which is preferably made of lead material and is provided with an appropriate recess 17 with which it encloses the support strut 1,2. the Edge 18 of this recess engages through a slot 16 in part 1 in one of the slots 3 of part 2. Thereby are the two parts 1 and 2 belonging to the support strut secured against telescopic displacement. The compression spring 7 keeps the locking slide 4 always in the locked position, and only by pressing button 8 in the direction of arrow χ can be unlocked. Here, the chamfer 19, which is part of the recess 17, causes the locking edge does not exit completely from the slot 16 of the support strut 1, so only the slots 3 and support strut 2 are released and thus an "adjustment of the backrest ns does ze in the desired location can be made. A slotted plate 5j preferably with a round tear 6 in a corresponding hole engages in the support strut 1 and is thus secured against lateral displacement, takes over with the two seat strands 20 the longitudinal guide of the locking slide 4. The tear 6 of the slotted plate 5 is used in the Embodiment at the same time to accommodate the pressure

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RA, 561536-27.10.66

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feder 7 · However, it can also be secured by means of an appropriate bolt be replaced.

The locking slide 4, which is designed here as a pressure slide, can of course also be designed as a pull slide. to For this purpose, the correspondingly shaped actuating button 8 is located on the side of the locking slide opposite the compression spring 7 4- arranged.

Claims (3)

Expectations 1.) Adjustable backrest support of a seat that is pivotably mounted at the rear end of the seat on an axis (15) and its lower end is articulated at point (13) with a telescopic support strut (1,2) which is articulated on the seat support at point (12) is attached, is connected, characterized in that a locking slide (4-) with an appropriate Recess encloses the support strut (1,2) and with its locking edge (18) into the slots (16,3) of the support strut (1,2) engages and thus secures against telescopic displacement. 2.) Adjustable backrest support of a seat according to claim 1, characterized in that the locking slide (4-) by a slotted plate (5) »which is preferably secured with a round tear (6) in the support strut (1) and is held by the compression spring (7) and that the locking slide (4-) by the compression spring (7) in Is pushed into the locking position and held there. 3.) Adjustable backrest support of a seat according to the Claims 1 and 2, characterized in that the Locking slide (4) is designed as a pressure slide, i.e. that it is actuated by pressing the button (8) will. _ P.Ä. 561 536 * 10/27/66 4-.) Adjustable EuGkenlelineiisträger a seat according to the Claims 1 and 2, characterized in that the locking slide (4) is designed as a pull slide, i.e. it is operated by pulling on the button (8).