To provide a device having relatively simple construction and high performance to endure long-time use, capable of converting vibrating motion into rotating motion.

The device comprises an inner cymbal 2 for rotatably supporting a rotating shaft 1a of a top 1, an outer cymbal 4 for supporting the inner cymbal 2 to rotate the rotating shaft 1a in a plane including the rotating shaft, a driving motor 8 mounted on the outer cymbal 4 with its main shaft connected to a rotating shaft 2a of the inner cymbal 2 for rotating the inner cymbal 2, and a supporting shaft 9 for turnably supporting the outer cymbal 4.