| 摘要 |
PCT No. PCT/EP96/05794 Sec. 371 Date Jul. 7, 1998 Sec. 102(e) Date Jul. 7, 1998 PCT Filed Dec. 20, 1996 PCT Pub. No. WO97/24955 PCT Pub. Date Jul. 17, 1997A device for adjusting the inclination of the seating portion in chairs in general, to be applied to a support for the seating portion formed in at least two parts (2, 12) hinged together about a transverse axis (14) and associated with a spring (20) interposed between them to elastically maintain the back rest of the chair in its most forwardly inclined position, and also associated with a locking member (24) to maintain them in other predetermined positions corresponding to different inclinations of the back rest, characterised by comprising: a locking bolt (26) forming part of the locking member (24) and fixed to one (2) of the two parts (2, 12) of the support for the seating portion, a plurality of holes (22) provided in the other part (12) of the support for the seating portion in positions engageable by the bolt (26) and corresponding to different relative inclinations between the two parts (2, 12) of the support, a rod (30) for axially operating the bolt (26), an axially bistable device (34) for controlling the rod (30), a pair of preloaded springs (50, 52) interposed between the rod (30) and the bistable device (34), and an operating pusher (46) for the bistable device (34).
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