| 摘要 |
For a steplessly adjustable vertical movement device for chairs, tables or the like articles, which comprises a blockable gas spring which is arranged in a telescopic unit consisting of a telescopic tube and a guide tube and is connected by means of self-locking taper connections on the one hand with the chair seat or a similar article of adjustable height and on the other hand with a foot part, a simple replacement of the gas spring is to be provided, while security against unintended unscrewing of the gas spring is guaranteed. The gas spring should here be as simple as possible in construction, permit easy assembly and dismantlement and be arranged as freely as possible from bending stresses in the telescopic unit. This is achieved in that for the connection of the gas spring with the telescopic tube one of the components is provided with at least one threading-type depression which, in the fitting of the gas spring in the telescopic tube, is penetrated by at least one projection provided on the other component, an end face situated on the end of the depression forming an axial stop with the projection.
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