Invention Grant
- Patent Title: Tuning fork-type vibrator
-
Application No.: US16473409Application Date: 2017-12-19
-
Publication No.: US11239824B2Publication Date: 2022-02-01
- Inventor: Tomo Fujii , Hiroaki Yamashita
- Applicant: DAISHINKU CORPORATION
- Applicant Address: JP Kakogawa
- Assignee: DAISHINKU CORPORATION
- Current Assignee: DAISHINKU CORPORATION
- Current Assignee Address: JP Kakogawa
- Agency: Norris McLaughlin, P.A.
- Priority: JPJP2017-015344 20170131
- International Application: PCT/JP2017/045510 WO 20171219
- International Announcement: WO2018/142789 WO 20180809
- Main IPC: H03H9/21
- IPC: H03H9/21 ; H03H9/10 ; H03H9/13

Abstract:
A tuning fork-type vibration piece is provided, in which a cushioning portion is formed on the base of a package to make contact with abutting portions of arm portions which are any parts but their edges, and the abutting portions of the arm portions allowed to contact the cushioning portion are electrodeless regions including no electrode, which prevents the risk of frequency fluctuations that may occur in case an electrode is chipped off by possible contact with the cushioning portion.
Information query
IPC分类: