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Brief description of the drawings
FIG. 1 is a cross-sectional view of a conventional timepiece provided with a piezoelectric speaker,
FIG. 2 is a sound pressure-drive frequency characteristic diagram of a conventional piezoelectric
speaker for a watch, and FIG. 3 is provided with the piezoelectric speaker of the present
invention FIG. 4 is a cross-sectional view of the watch body, and FIG. 4 is a graph showing the
sound pressure-drive frequency characteristics of the piezoelectric speaker for watch of the
present invention. DESCRIPTION OF SYMBOLS 1 ... Piezoelectric element, 2 ... back pig, 3 ... body,
4 ... scooped part, 5 ... coil spring, 6 ... clock module, 7 ... lead spring, 8 .. ... back pig, 9 ... core, 10
...] (angle brackets and read) eating with the part of the form, 11 ... body, 12 ...] form with eating
of parts, 13, · · ツ, fO1 + f02 ... mechanical resonance frequency.