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US 11,239,824 B2Granted
Tuning fork-type vibrator
AssigneeDaishinku Corporation
InventorsTomo Fujii, Hiroaki Yamashita
Life of this patent
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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.
Claims7
A tuning fork-type vibrator, comprising:
- a tuning fork-type vibration piece that comprises a stem portion and a plurality of arm portions extending from the stem portion;
- and
- a package including a housing portion in which the tuning fork-type vibration piece is housed,
- wherein
- the stem portion is joined to an electrode in the housing portion of the package,
- wherein
- the housing portion of the package has a cushioning portion formed in a certain thickness on a bottom surface thereof,
- wherein
- the cushioning portion is formed to avoid contact of edges of the plurality of arm portions with the bottom surface by allowing abutting potions of the plurality of arm portions to contact the cushioning portion in case the plurality of arm portions on a free end side of the tuning fork-type vibration piece are warped toward the bottom surface, the abutting portions being any parts but the edges of plurality of arm portions,
- wherein
- a frequency adjustment metal film is formed in an edge-side region on one of front and back main surfaces in a respective one of the plurality of arm portions,
- wherein
- the abutting portions are electrodeless regions where the tuning fork-type vibration piece has a raw surface thereof exposed in the absence of any electrode
- and wherein
- the electrodeless region is formed in an edge-side region on the other one of the front and back main surfaces in the respective one of the plurality of arm portions.
12 more elements
A tuning fork-type vibrator, comprising
- a tuning fork-type vibration piece having a stem portion and a plurality of arm portions extending from the stem portion;
- and
- a package including a housing portion in which the tuning fork-type vibration piece is housed,
- wherein
- the stem portion is joined to an electrode in the housing portion of the package,
- wherein
- the housing portion of the package has a cushioning portion formed in a certain thickness on a bottom surface thereof,
- wherein
- the cushioning portion is formed to avoid contact of edges of the plurality of arm portions with the bottom surface by allowing abutting portions of the plurality of arm portions to contact the cushioning portion in case the plurality of arm portions on a free end side of the tuning fork-type vibration piece are warped toward the bottom surface, the abutting portions being any parts but the edges of plurality of arm portions,
- and wherein
- the abutting portions each comprise a shock absorber that absorbs shock at the time of contact with the cushioning portion.
8 more elements
Dependencies are inferred from the claim text.