Timepiece comprising a vibration-amplifying device

A timepiece comprising a case having a middle, a back cover and a bezel, a movement and a vibration-generating device intended to produce at least one sound, the movement and the vibration-generating device accommodated in said case, a vibration-amplifying device for amplifying vibrations generated by said vibration-generating device, and a membrane arranged to receive said vibrations and generate a sound from the inside to the outside of the timepiece, wherein said vibration-amplifying device comprises a lever pivotally mounted on a support in a pivoting plane non-parallel to a plane of the membrane and arranged to be actuated by a transmission member cooperating with the vibration-generating device to transmit the vibrations to the lever, said lever likewise being integral with the membrane at least translationally in the pivoting plane such that a movement of the transmission member, generated by a vibration of said transmission member linked to the vibration-generating device and transmitted to the membrane by way of the lever actuated by said transmission member, generates an amplified movement of said membrane, so as to generate an amplified sound, wherein the lever is pivotally mounted on the support by way of a pin or a flexible ball joint.