| 摘要 |
PROBLEM TO BE SOLVED: To reduce the number of assembly man-hours by making an alarm clock have a structure in which a contact part that is withdrawn toward the outside of a coil spring outer diameter is provided at one end of a coil spring and fixing to a circuit substrate is performed at the contact part. SOLUTION: A contact part 4a that is withdrawn to the outside of the outer diameter of a coil spring 4 is formed at one end of a coil spring 4 for electrically connecting a piezoelectric element 1 to the pattern of a circuit substrate 3, and is fixed to the pattern of the circuit substrate 3 by solder 10. The other end of the coil spring 4 is in contact with the piezoelectric element 1. A hole 3b that is used when assembling the coil spring 4 is a through hole and is electrically connected to a side that is opposite to the side of the coil spring 4 of the circuit substrate 3. The circuit substrate 3 is fixed to a support frame 7.
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