A device for actuating a timepiece mechanism, in particular a chronograph mechanism, this timepiece including a fitting ring (12) having an opening (14) for accommodating a movement (16), an independent push-button (4a, 4b) sliding along a first direction (D1), a piston (18a, 18b) sliding along a second direction (D2, D3) in the fitting ring (12), said piston (18a, 18b) being intended to co-operate with a component of the movement and a push transmission element to transmit a push of said pushbutton (4a, 4b) to said piston (18a, 18b), characterized in that the push transmission element includes a rigid actuation lever (22a, 22b) articulated at one point (P) on the fitting ring (12) and in the plane thereof.

The invention concerns a push-piece control device for a watch comprising a case (10) provided with a middle (12), an arbor (16) integral with a crown (20) and mounted pivoting in the middle (12) and a push-piece (18) mounted sliding and coaxial to the arbor (16). The invention is characterized in that it further comprises a lever (32) mounted pivoting on said case (10) by one of its ends (32a), mobile in a plane substantially parallel to the watch plane, including, in its median part (32b), a contact point designed to co-operate with said push-piece (18) and, at its other end (32c), a concave control portion.

The invention concerns a watch including a case having a middle part and housing a watch movement having a time-setting stem in a first peripheral region, said movement further including a first and a second control member which are arranged on either side of the time-setting stem and which each have an angular shift of less than 90.degree. with the time-setting stem in relation to the centre of the movement, the watch further including an actuation device including a first and a second push-button arranged on the case in proximity to the movement, for respectively actuating said first and second control members, said watch being characterized in that, between each of said first and second push-buttons and said time-setting stem, there is an angular shift greater than 90.degree. in relation to the centre of the movement, in that said first and second push-buttons are arranged in a second peripheral region of said watch movement, in that said actuation device further includes a transmission mechanism extending between said first push-button and said first control member, on the one hand, and between said second push-button and said second control member on the other hand, and in that said transmission mechanism is independent of said watch movement.

This pushbutton device for controlling the start/stop and resetting functions of a chronograph mechanism comprises two control pushbuttons able to slide between two limit positions, elastic return means which constantly tend to keep these pushbuttons in their outward limit positions, and a control rocker which pivots about a pivot. The control rocker is situated between the pushbuttons, the latter being, in their outward limit positions, simultaneously in contact with the control rocker, keeping it in a middle position between the limit positions of its pivoting, which correspond to the movement of the pushbuttons to their respective inward limit positions.

The watch comprises a case (9) with a fixed part (10) in the shape of a bracket (20) and a mobile part (11) with a middle (21) and a movement (23) mounted onto the fixed part (10) so as to be able to swivel about a swivel axis (32) thanks to pivots (31) in order to realize a tilting motion of the mobile part (11) in two opposite directions. Two actuating mechanisms (44, 45) are mounted into the middle (21) and intended to transform the tilting motions into an action upon two control organs of functions of the movement that may be of the chronograph type. One thus obtains a watch without push-pieces, functioning precisely, having great stability and easy manipulation.