JPS5456868A - Electronic watch - Google Patents
Electronic watchInfo
- Publication number
- JPS5456868A JPS5456868A JP12311977A JP12311977A JPS5456868A JP S5456868 A JPS5456868 A JP S5456868A JP 12311977 A JP12311977 A JP 12311977A JP 12311977 A JP12311977 A JP 12311977A JP S5456868 A JPS5456868 A JP S5456868A
- Authority
- JP
- Japan
- Prior art keywords
- temperature
- piezoelectric vibrators
- temperature coefficient
- electronic watch
- frequency
- 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
Links
- 239000013078 crystal Substances 0.000 abstract 1
Classifications
-
- G—PHYSICS
- G04—HOROLOGY
- G04F—TIME-INTERVAL MEASURING
- G04F5/00—Apparatus for producing preselected time intervals for use as timing standards
- G04F5/04—Apparatus for producing preselected time intervals for use as timing standards using oscillators with electromechanical resonators producing electric oscillations or timing pulses
- G04F5/06—Apparatus for producing preselected time intervals for use as timing standards using oscillators with electromechanical resonators producing electric oscillations or timing pulses using piezoelectric resonators
- G04F5/063—Constructional details
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Electric Clocks (AREA)
- Oscillators With Electromechanical Resonators (AREA)
- Piezo-Electric Or Mechanical Vibrators, Or Delay Or Filter Circuits (AREA)
Abstract
PURPOSE:To improve the frequency temperature characteristics by specifying the shape of piezoelectric vibrators in an electronic watch using two or more piezoelectric vibrators. CONSTITUTION:Piezoelectric vibrators 5 composed of crystal, etc. are formed in tuning fork type of less than 150mum in thickness and at least one is etched to provide tapers 12a, 12b to its vibrating arms 10a, 10b, so that a change is given to their width direction size over part or the whole of the length direction. These cause zero temperature coefficient temperature to be deviated by several degrees to the high temperature side without changing the value of secondary temperature coefficient too much, the zero temperature coefficient temperature on the high temperature side to be sufficiently increased, the spacing between the piezoelectric vibrators 5 to be taken wide, the frequency temperature characteristics to be corrected over a sufficiently wide temperature range and the watch accuracy to be improved.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12311977A JPS5456868A (en) | 1977-10-14 | 1977-10-14 | Electronic watch |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12311977A JPS5456868A (en) | 1977-10-14 | 1977-10-14 | Electronic watch |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5456868A true JPS5456868A (en) | 1979-05-08 |
Family
ID=14852644
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP12311977A Pending JPS5456868A (en) | 1977-10-14 | 1977-10-14 | Electronic watch |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5456868A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2013066211A (en) * | 2012-11-15 | 2013-04-11 | Seiko Epson Corp | Vibration piece, vibrator, oscillator, sensor and device |
JP2013066210A (en) * | 2012-11-15 | 2013-04-11 | Seiko Epson Corp | Vibration piece, vibrator, oscillator, sensor and device |
-
1977
- 1977-10-14 JP JP12311977A patent/JPS5456868A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2013066211A (en) * | 2012-11-15 | 2013-04-11 | Seiko Epson Corp | Vibration piece, vibrator, oscillator, sensor and device |
JP2013066210A (en) * | 2012-11-15 | 2013-04-11 | Seiko Epson Corp | Vibration piece, vibrator, oscillator, sensor and device |
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