Mechanical device, particularly for the movement and selective locking of a chair.

摘要

The mechanical device, particularly for the movement and selective locking of a chair, comprises a pair of arms (3a,3b) to be fastened to the chair and consists of a swivel boxlike element (5) associated with a pivoting pin (4) integral with said pair of arms (3a,3b), which contains a molding box (20) integral with said pin (4). The molding box (20) interacts both with means of resilient opposition (24,25) to said boxlike element and with a separate means for the selective locking of the position of the chair with regard to the boxlike element (20) and for the control for a gas piston. This mechanical device makes it possible to achieve an optimal adjustment of the chair by directly acting on the selective locking means which interacts with the molding box (20). <IMAGE>