Sankyo Seiki Mfg. Co., Ltd

Junichi Takemura

Shinroku Asakawa

Makoto Orii

Motonori Usui

A music box comprises a comb having vibrating teeth, a drum having elements for plucking the comb for playing music, a driving source for rotating the drum, a speed governor for regulating rotation speed and a frame for supporting the comb, drum, driving source and speed governor. The speed governor further comprises an accelerating train having two worms and a control device provided on a last row of the accelerating train. A position maintaining element is integrally arranged with the frame for preventing at least the first worm positioned on the driving source side, of the two worms referred to, from moving in the thrust direction. In one form, the music box has a driving source which includes a spring. One end of the spring is engaged with a winding shaft arranged in a spring housing of the spring and the other end is engaged with an engagement section provided on the frame. A contact section is formed on the frame for preventing the other end of the spring engaged with the engagement section from moving out of the spring housing.

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Nagano, Japan

Junichi Takemura