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US 6,958,553 B2Granted
Linear oscillator
AssigneeMatsushita Electric Works, Ltd.
InventorsYoshitaka Ichii, Katsuhiro Hirata, Yasushi Arikawa, Tomio Yamada, Hidekazu Yabuuchi, Hiroki Inoue
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Abstract
A linear oscillator includes a reciprocating moving part, a case to contain the moving part, and an amplitude control spindle moveably supported in the case. The moving part and the amplitude control spindle reciprocate at a frequency approximately equal to the resonance frequency of the linear oscillator.
Claims17
A linear oscillator, comprising:
- a reciprocatable moving part;
- a case containing the moving part;
- an amplitude control spindle moveably supported in the case;
- an electromagnetic driving part housed in the case for reciprocating the moving part, wherein the electromagnetic driving part comprises:
- at least one permanent magnet, and
- at least one coil surrounding the moving part;
- and
- a spring member disposed at least between the case and the moving part and between the case and the amplitude control spindle to form a spring oscillation system,
- wherein the moving part and the amplitude control spindle reciprocate at or near to a resonance frequency of the linear oscillator.
6 more elements
Dependencies are inferred from the claim text.