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JPS5486292A - Electronic buzzer for timer - Google Patents

Electronic buzzer for timer

Info

Publication number
JPS5486292A
JPS5486292A JP15378377A JP15378377A JPS5486292A JP S5486292 A JPS5486292 A JP S5486292A JP 15378377 A JP15378377 A JP 15378377A JP 15378377 A JP15378377 A JP 15378377A JP S5486292 A JPS5486292 A JP S5486292A
Authority
JP
Japan
Prior art keywords
piezoelectric
diaphragm
diaphragms
frequency
piezoelectric diaphragm
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
JP15378377A
Other languages
Japanese (ja)
Inventor
Tomohiko Abe
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 JP15378377A priority Critical patent/JPS5486292A/en
Publication of JPS5486292A publication Critical patent/JPS5486292A/en
Pending legal-status Critical Current

Links

Landscapes

  • Piezo-Electric Transducers For Audible Bands (AREA)

Abstract

PURPOSE: To expand the band of the in-use frequency of an elecronic buzzer, and to obtain water-proof structure by making a piezoelectric diaphragm, composed of a diaphragm and piezoelectric-material plate stuck to it, into the double structure.
CONSTITUTION: Two piezoelectric diaphragms 1 and 2 different in resonance frequency are doubled, that is, piezoelectric diaphragms 1 and 2 are arranged at both the sides of fixing frame 8. Those piezoelectric diaphragms 1 and 2 are connected to driver circuit 7 in parallel. In this way, making different the resonance frequencies of diaphragms 1 and 2 allows piezoelectric diaphragm 1 to protect inside piezoelectric diaphragm 2 from external pressure and, in consequence, a low frequency can be obtained by a thin diaphragm, so that the in-use band of the frequency can be expanded. In addition, the diaphragm of piezoelectric diaphragm 1 is formed thicker than that of piezoelectric diaphragm 2, so that the high-strength water-proof structure can be obtained.
COPYRIGHT: (C)1979,JPO&Japio
JP15378377A 1977-12-21 1977-12-21 Electronic buzzer for timer Pending JPS5486292A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15378377A JPS5486292A (en) 1977-12-21 1977-12-21 Electronic buzzer for timer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15378377A JPS5486292A (en) 1977-12-21 1977-12-21 Electronic buzzer for timer

Publications (1)

Publication Number Publication Date
JPS5486292A true JPS5486292A (en) 1979-07-09

Family

ID=15570035

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15378377A Pending JPS5486292A (en) 1977-12-21 1977-12-21 Electronic buzzer for timer

Country Status (1)

Country Link
JP (1) JPS5486292A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5857197U (en) * 1981-10-09 1983-04-18 松下電器産業株式会社 piezoelectric sounding body
US6215391B1 (en) * 1999-10-22 2001-04-10 Ericsson Inc. Variable frequency buzzer assembly
WO2013121715A1 (en) * 2012-02-15 2013-08-22 パナソニック株式会社 Speaker

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5857197U (en) * 1981-10-09 1983-04-18 松下電器産業株式会社 piezoelectric sounding body
US6215391B1 (en) * 1999-10-22 2001-04-10 Ericsson Inc. Variable frequency buzzer assembly
WO2013121715A1 (en) * 2012-02-15 2013-08-22 パナソニック株式会社 Speaker
JPWO2013121715A1 (en) * 2012-02-15 2015-05-11 パナソニックＩｐマネジメント株式会社 Speaker
US9107005B2 (en) 2012-02-15 2015-08-11 Panasonic Intellectual Property Management Co., Ltd. Speaker

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