发明名称 Electronic timepiece including a piezoelectric alarm
摘要 An electronic timepiece including a piezoelectric type alarm buzzer wherein the caseback functions as the buzzer diaphragm is provided. The piezoelectric element is mounted on the caseback and a battery for driving the timepiece is mounted on the piezoelectric element with an electrical insulating member therebetween for preventing short-circuiting between the battery and piezoelectric element. In an exemplary embodiment, the electrical insulating member for mounting for holding the battery is mounted to the piezoelectric element at a peripheral portion in order not to effect adversely the sound level. Alternatively, when design considerations require the battery may be mounted in a more central portion of the piezoelectric element, an angular insulating member having a central opening is used so that the insulating member contacts the piezoelectric element at the periphery thereof.
申请公布号 US4440504(A) 申请公布日期 1984.04.03
申请号 US19810288610 申请日期 1981.07.30
申请人 KABUSHIKI KAISHA SUWA SEIKOSHA 发明人 MIYAZAKI, HAJIME
分类号 G10K9/12;G04C21/02;G04G13/02;G10K9/122;(IPC1-7):G04C21/16 主分类号 G10K9/12
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