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Patent Searching and Data


Title:
VIBRATION DEVICE
Document Type and Number:
WIPO Patent Application WO/2012/011238
Kind Code:
A1
Abstract:
Viewed planarly, a second piezoelectric vibrator (30) is positioned in a center portion (21) of a first piezoelectric vibrator (20). The inner surface of a frame-shaped support body (40) supports the edge of a vibrator member (10). Further, the fundamental resonance frequency of the first piezoelectric vibrator (20) is lower than the fundamental resonance frequency of the second piezoelectric vibrator (30). Further, when the first piezoelectric vibrator (20) is driven at the fundamental resonance frequency, the second piezoelectric vibrator (30) overlaps with the vibration loops generated in the vibration member (10). Ideally, the center of the second piezoelectric vibrator (30) overlaps with the center of the vibration loops generated in the vibration member (10) by means of the first piezoelectric vibrator (20).

Inventors:
ONISHI, Yasuharu (7-1 Shiba 5-chome, Minato-k, Tokyo 01, 〒1088001, JP)
大西 康晴 (〒01 東京都港区芝五丁目7番1号日本電気株式会社内 Tokyo, 〒1088001, JP)
KURODA, Jun (7-1 Shiba 5-chome, Minato-k, Tokyo 01, 〒1088001, JP)
黒田 淳 (〒01 東京都港区芝五丁目7番1号日本電気株式会社内 Tokyo, 〒1088001, JP)
KOMODA, Motoyoshi (7-1 Shiba 5-chome, Minato-k, Tokyo 01, 〒1088001, JP)
菰田 元喜 (〒01 東京都港区芝五丁目7番1号日本電気株式会社内 Tokyo, 〒1088001, JP)
SATOU, Shigeo (7-1 Shiba 5-chome, Minato-k, Tokyo 01, 〒1088001, JP)
Application Number:
JP2011/003893
Publication Date:
January 26, 2012
Filing Date:
July 07, 2011
Export Citation:
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Assignee:
NEC CORPORATION (7-1 Shiba 5-chome, Minato-ku Tokyo, 01, 〒1088001, JP)
日本電気株式会社 (〒01 東京都港区芝五丁目7番1号 Tokyo, 〒1088001, JP)
ONISHI, Yasuharu (7-1 Shiba 5-chome, Minato-k, Tokyo 01, 〒1088001, JP)
大西 康晴 (〒01 東京都港区芝五丁目7番1号日本電気株式会社内 Tokyo, 〒1088001, JP)
KURODA, Jun (7-1 Shiba 5-chome, Minato-k, Tokyo 01, 〒1088001, JP)
黒田 淳 (〒01 東京都港区芝五丁目7番1号日本電気株式会社内 Tokyo, 〒1088001, JP)
KOMODA, Motoyoshi (7-1 Shiba 5-chome, Minato-k, Tokyo 01, 〒1088001, JP)
菰田 元喜 (〒01 東京都港区芝五丁目7番1号日本電気株式会社内 Tokyo, 〒1088001, JP)
International Classes:
H04R17/00; G01H17/00; H04R1/24; H04R3/00
Attorney, Agent or Firm:
HAYAMI, Shinji (Gotanda TG Bldg. 9F, 9-2 Nishi-Gotanda 7-chome, Shinagawa-k, Tokyo 31, 〒1410031, JP)
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Claims: