時計用圧電ブザーの開発 : 裏ブタ直接駆動型圧電ブザーについて

概要

論文の詳細を見る
Looking ahead into the coming main stream of buzzer for watch, we directed our attention toward the case back direct drive type piezoelectric buzzer whose volume is not turned down when the watch is worn on the wrist. We succeeded in developing and putting it to practical use. The principal merits of this buzzer are as follows. 1. Design and structure of watch are not restricted. 2. It is possible to make watch thin. 3. High pressure resistant waterproof watch can be realized without any structural speciality. 4. The cost is greatly reduced.
社団法人日本時計学会の論文
1981-09-25