JPS57191586A - Timepiece - Google Patents

Timepiece

Info

Publication number
JPS57191586A
JPS57191586A JP7653781A JP7653781A JPS57191586A JP S57191586 A JPS57191586 A JP S57191586A JP 7653781 A JP7653781 A JP 7653781A JP 7653781 A JP7653781 A JP 7653781A JP S57191586 A JPS57191586 A JP S57191586A
Authority
JP
Japan
Prior art keywords
vibrating plate
vibrating
vibrates
sound
doughnut
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
JP7653781A
Other languages
Japanese (ja)
Inventor
Hideki Kosaka
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP7653781A priority Critical patent/JPS57191586A/en
Publication of JPS57191586A publication Critical patent/JPS57191586A/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 eliminate a through hole for sound radiation and to eliminate the need for the countermeasure to waterproofing by forming a vibrating in the same body with a back, and vibrating the back together with the vibrating plate for sound generation. CONSTITUTION:A doughnut-like vibrating plate 33 having a concentrically stuck doughnut-like piezoelectric element 32 is arranged inside of a back 26, and the internal circumferential edge 33a of the vibrating plate 33 is stuck, by welding, etc., to the internal surface of the back 26 in one body. Consequently, the back 26 is formed as part of a vibrator which vibrates together with the vibrating plate 33 in one body, and vibrates in one body when the vibrating plate 33 vibrates, generating a sound.
JP7653781A 1981-05-22 1981-05-22 Timepiece Pending JPS57191586A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7653781A JPS57191586A (en) 1981-05-22 1981-05-22 Timepiece

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7653781A JPS57191586A (en) 1981-05-22 1981-05-22 Timepiece

Publications (1)

Publication Number Publication Date
JPS57191586A true JPS57191586A (en) 1982-11-25

Family

ID=13608012

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7653781A Pending JPS57191586A (en) 1981-05-22 1981-05-22 Timepiece

Country Status (1)

Country Link
JP (1) JPS57191586A (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5337465A (en) * 1976-09-17 1978-04-06 Ricoh Elemex Corp Wristwatch with alarm device
JPS5594179A (en) * 1979-01-10 1980-07-17 Sanyo Electric Co Ltd Electronic wrist watch with acoustic device

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5337465A (en) * 1976-09-17 1978-04-06 Ricoh Elemex Corp Wristwatch with alarm device
JPS5594179A (en) * 1979-01-10 1980-07-17 Sanyo Electric Co Ltd Electronic wrist watch with acoustic device

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