Vibration motor with multistage concentrator for recorder - has one stage connected to piezoelectric cell and other to rotor

摘要

A vibration motor is based on a multistage concentrator for torsional vibrations. It can be used in sound recording and reproduction equipment. One stage of the concentrator is in contact with a piezo-electric cell and the other driving stage is in contat with a rotor. The driving stage is designed as a ring-shaped resonator for torsional vibrations. The driving stage (3) has a cone-shaped surface (7), which is in contact with the surface (8) of the rotor (9). A disc (10) presses against the rotor. The first stage (2) of the concentrator is designed as a cylinder with sloping grooves (4), penetrating to a given depth. They transform the longitudinal into torsional vibrations.