| 摘要 |
The rapid locking device for an articulation mounted on the frame of the backrest of a chair in addition to the positioning articulations or drive fittings is composed of an external casing 1 having, at its centre, a central shaft 11 linked by various means to one of the sides of the frame of the chair backrest, this external casing containing an essentially star-shaped second casing 6 in which a return spring 13 of the backrest can be included, given that one of the ends 12 of this spring is fastened to the central rotating shaft 11 and that the other end 14 of this spring 13 is in engagement via a U-shaped part 14 with the lateral internal face of the star-shaped casing 6. <IMAGE> |
