| 摘要 |
PROBLEM TO BE SOLVED: To provide a music box in which an influence of heat generated in an electromagnet is reduced.SOLUTION: Since a thermal deformation part 80 is provided which is thermally deformed by transmission thereto of heat generated by power supply to an electromagnet 24 to move the electromagnet 24 in such a direction as to narrow a gap d between the electromagnet and a stopper 22, the reduction in attractive force of the electromagnet 24 due to a winding resistance increasing in accordance with the temperature rise caused by power supply to the electromagnet 24 is compensated by thermally deforming the thermal deformation part 80 in accordance with the temperature rise to change the gap d between the electromagnet 24 and the stopper 22, so that an influence of heat generated in the electromagnet 24 can be reduced. |
