JPS55131790A - Buzzer construction of electronic alarm watch - Google Patents

Buzzer construction of electronic alarm watch

Info

Publication number
JPS55131790A
JPS55131790A JP3890079A JP3890079A JPS55131790A JP S55131790 A JPS55131790 A JP S55131790A JP 3890079 A JP3890079 A JP 3890079A JP 3890079 A JP3890079 A JP 3890079A JP S55131790 A JPS55131790 A JP S55131790A
Authority
JP
Japan
Prior art keywords
resonance plate
projection
piezoelectric element
deformation
plate
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP3890079A
Other languages
Japanese (ja)
Inventor
Mitsutoshi Nakamura
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Citizen Watch Co Ltd
Original Assignee
Citizen Watch Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Citizen Watch Co Ltd filed Critical Citizen Watch Co Ltd
Priority to JP3890079A priority Critical patent/JPS55131790A/en
Publication of JPS55131790A publication Critical patent/JPS55131790A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G04—HOROLOGY
    • G04G—ELECTRONIC TIME-PIECES
    • G04G13/00—Producing acoustic time signals
    • G04G13/02—Producing acoustic time signals at preselected times, e.g. alarm clocks
    • G04G13/021—Details

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electromechanical Clocks (AREA)
  • Piezo-Electric Transducers For Audible Bands (AREA)

Abstract

PURPOSE:To improve the reliability of sound generating mechanism with a less deformation of metal resonance plate due to external pressure. CONSTITUTION:A metal resonance plate 4 is fitted into the inner wall surface 2b of the back cover 2 and a concave section 4a is provided on the resonance plate 4 to help the positioning and bonding of a piezoelectric element 5. In addition, a projection 4b is provided by drawing the resonance plate 4 to prevent the deformation of the bonding surface of the element on the resonance plate 4 due to the pressure of water infiltrated through a sound releasing hole 2a of the back cover 2. In this manner, the deformation of the bonding surface of the piezoelectric element is reduced with a reinforcing means including the projection 4b, while the deflection of the entire resonance plate is regulated the projection and the piezoelectric element reinforcing plate butt against the movement thereby regulating the deflection of the entire resonance plate.
JP3890079A 1979-03-30 1979-03-30 Buzzer construction of electronic alarm watch Pending JPS55131790A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3890079A JPS55131790A (en) 1979-03-30 1979-03-30 Buzzer construction of electronic alarm watch

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3890079A JPS55131790A (en) 1979-03-30 1979-03-30 Buzzer construction of electronic alarm watch

Publications (1)

Publication Number Publication Date
JPS55131790A true JPS55131790A (en) 1980-10-13

Family

ID=12538063

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3890079A Pending JPS55131790A (en) 1979-03-30 1979-03-30 Buzzer construction of electronic alarm watch

Country Status (1)

Country Link
JP (1) JPS55131790A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62155599U (en) * 1986-03-25 1987-10-02
JPH0255193U (en) * 1988-10-17 1990-04-20

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62155599U (en) * 1986-03-25 1987-10-02
JPH0445359Y2 (en) * 1986-03-25 1992-10-26
JPH0255193U (en) * 1988-10-17 1990-04-20

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