JPS566186A - Alarm unit for timepiece - Google Patents

Alarm unit for timepiece

Info

Publication number
JPS566186A
JPS566186A JP8161179A JP8161179A JPS566186A JP S566186 A JPS566186 A JP S566186A JP 8161179 A JP8161179 A JP 8161179A JP 8161179 A JP8161179 A JP 8161179A JP S566186 A JPS566186 A JP S566186A
Authority
JP
Japan
Prior art keywords
piezoelectric element
timepiece
transparent piezoelectric
alarm unit
reflection
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
JP8161179A
Other languages
Japanese (ja)
Inventor
Masanobu Fujisaki
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.)
Seiko Epson Corp
Suwa Seikosha KK
Original Assignee
Seiko Epson Corp
Suwa Seikosha KK
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 Seiko Epson Corp, Suwa Seikosha KK filed Critical Seiko Epson Corp
Priority to JP8161179A priority Critical patent/JPS566186A/en
Publication of JPS566186A publication Critical patent/JPS566186A/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)
  • Electric Clocks (AREA)

Abstract

PURPOSE:To improve transmittancy by forming a reflection-preventive film on a transparent piezoelectric element when constituting an alarm unit for a timepiece by equipping the transparent piezoelectric element on the reverse side of cover glass, one side of a liquid panel substrate, etc. CONSTITUTION:At the interface between cover glass 1 and transparent piezoelectric element 2, a reflection-preventive film of one or two layers or more is formed. On the reverse side of transparent piezoelectric element 2, the reflection-preventive film of one or two layers or more is formed to further improve the transmittancy.
JP8161179A 1979-06-28 1979-06-28 Alarm unit for timepiece Pending JPS566186A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8161179A JPS566186A (en) 1979-06-28 1979-06-28 Alarm unit for timepiece

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8161179A JPS566186A (en) 1979-06-28 1979-06-28 Alarm unit for timepiece

Publications (1)

Publication Number Publication Date
JPS566186A true JPS566186A (en) 1981-01-22

Family

ID=13751108

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8161179A Pending JPS566186A (en) 1979-06-28 1979-06-28 Alarm unit for timepiece

Country Status (1)

Country Link
JP (1) JPS566186A (en)

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