Vibration generator and apparatus for engraving an image
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United States of America Patent
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Feb 13, 2024
Grant Date -
Nov 11, 2021
app pub date -
Apr 28, 2021
filing date -
May 8, 2020
priority date (Note) -
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status (Latency Note)
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Abstract
The present invention provides a vibration generator capable of accurately adapting to fine vibration. The vibration generator has a stationary permanent magnet, a yoke for the permanent magnet, a coil fixed to the yoke, four springs provided to the yoke, and a movable piece supported with the yoke through the four springs. The end portions of the movable piece are arranged between the respective two pairs of the projections with first gaps. The central portion of the movable piece is arranged in the through-hole with the second gaps, the second gaps having a size to allow oscillation, which is regulated by the first gaps, of the central portion of the movable piece.
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