Timepiece anti-trip mechanism

摘要

Anti-trip mechanism for limiting the travel of a timepiece balance including a pin projecting from a staff, including a flexible multistable or bistable element carrying an anti-trip stop member and which is fixed, via flexible and elastic connecting members, to a rigid structural element of a timepiece movement. One end of said anti-trip stop member is arranged, according to the angular position of the balance, to interfere with the trajectory of the pin, and to perform the function of a stop if the balance exceeds its normal angular travel.;Each anti-trip stop member includes two arms whose respective ends each interfere with the trajectory of the pin.

主权项

1. A timepiece limiter or transmission mechanism to limit or transmit an angular travel of a mobile component of a timepiece movement, said mobile component including at least one projecting pin or tooth, said timepiece limiter or transmission mechanism comprising:
a limiting or transmission component which is fixed, via at least one monolithic flexible multistable bistable element, to another component of said movement or to a rigid structural element of said movement, wherein said mechanism forms an anti-trip mechanism to limit the angular travel of a timepiece balance of a timepiece movement, said balance including a staff and a pin projecting from said staff, said anti-trip mechanism including at least one flexible multistable or bistable element, carrying at least one anti-trip stop member, and which is fixed, via a plurality of flexible and elastic connecting members, to a rigid structural element of said timepiece movement, and wherein one end of said anti-trip stop member is arranged, according to an angular position of said balance, to interfere with a trajectory of said pin, and to perform a function of a stop member if said balance exceeds a normal angular travel thereof, wherein said anti-strip stop member includes two arms, whose respective ends can each interfere with the trajectory of said pin, wherein said flexible multistable or bistable element is fixed, via at least two flexible strips forming said flexible and elastic connecting elements, to said rigid structural element and wherein said anti-trip stop member includes at least two levels in order to hold said arms in a plane of said pin, on a first top level with said arms cooperating with said pin, and on a second lower level with a dart cooperating with a notch in said balance, and wherein said flexible multistable or bistable element includes flexible elements integrated in said arms of said stop member to prevent excessive shocks, wherein said flexible multistable or bistable element and said at least one anti-trip stop member together form a monolithic component, wherein said flexible and elastic connecting members are formed by at least thin strips each fixed at a first end to the structural element and connected via a second end to the body of the flexible element in a “V” shape, so as to define a virtual pivot about which the anti-trip stop member pivots, said flexible multistable or bistable element forming a flexible multistable or bistable pivot, and wherein two additional flexible strips are mounted prestressed and buckled relative to said structural element or relative to a frame comprised in said flexible multistable or bistable element, and said two additional flexible strips are each fixed at a first end to the structural element and connected via a second end to the body of the flexible element.