DE1897539U - HEIGHT ADJUSTMENT DEVICE FOR A CHAIR SEAT. - Google Patents

Description

Utility model registration

"Height adjustment device for a chair seat"

Height adjustment devices for chair seats are in the most diverse Executions known. All of the constructions used so far are unsatisfactory, as these for Rope are very expensive to manufacture. As a result of the compact design, they are in front especially not reliable after prolonged use.

The new design of seat height adjustment described below and registered for protection avoids the previously known powers. With the smallest possible number of mechanical parts with the simplest construction is a great success, not only in terms of economic production, but also in terms of functionality as well as in terms of safety in use.

The embodiment shows in

]? ig. 1 shows a longitudinal section through a telescopically adjustable Tubular steel chair column with the built-in adjustment mechanism,

]? ig. 2 the outer view of the tubular steel chair column with a any number in the Kohr arranged vertically one above the other Rush,

] fig. 3 a horizontal cross-section I-II according to i ^ ig. 1.

- 2 - η R ι ρ t ~ jr, _

U65160 * 5/22/84

In the exemplary embodiment according to FIGS. 1 to 3, the support tube 2 of the seat, guided in the outer chair column 1 and vertically displaceable in height, can be seen. The outer guide tube 1 is mounted in the lower part of the lower part with the chair legs 3 and the connecting piece 4. In order to prevent the support tube 2 from rotating within the guide tube 1, the support tube 2 has a vertical notch 5 ₅ into which a tongue 6 pressed into the guide tube 1 engages. The locking and vertical mounting of the support tube 2 with the outer guide tube 1 is achieved by a bending rod 8 which can be pivoted about a pin 7 within the support tube 2 and which is bent horizontally at the lower end by approx. 90 °, this bend being designed as a bolt 9 . This bolt 9 engages through an opening in the support tube in one of the notch cutouts 10 of the outer chair column 1 and thus locks the support tube 2 with the chair column 1, with the bolt 9 resting over a wide area in the notch. The flat cross section of the bolt 9 also only requires flat notch transverse sections 10, so that the notch spacing can be kept as small as possible and thus the increment is largely small. By the tension of a spring 11 attached to the locking bar 8, the locking bar 9 is securely locked in one of the notch openings 10 of the support tube 1. It is essential here that the bolt 9 has a stop 13, whereby the bolt comes to rest on the inner edge of the support tube 2 as a result of the spring tension of the spring 11 and the locking is thus limited. With the help of the handle lever 12, the locking rod 8 is pivoted about the axis of rotation 7 and thus the locking bar 9 is withdrawn from the notch opening 10 in order to then be able to make the desired height adjustment by pulling up the support tube 2.

Claims (5)

Expectations 1.) Tubular steel column in which a support tube is used a chair seat is arranged telescopically displaceable, characterized in that in the support tube a locking bar with a locking bar is received swinging around an axis of rotation, the locking bar in any Arranged at the height of the notches of the chair column engages. 2.) tubular steel column according to claim 1, characterized in that that the locking bar and the locking bar consist of one unit, with the locking bar having a slab underneath. 3.) Stahlrohrs column according to claims Λ and 2, characterized in that the locking rod is held positively by each in the "locking position. 4.) Stahlrohrs column according to claims Λ to 3, characterized in that the bolt is formed over a wide area at the contact point. 5.) tubular steel column according to claims 1 to 4, characterized in that the bolt with a stop is provided.