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US 4,354,067 AGranted
Audio-band electromechanical vibration converter
AssigneeBodysonic Kabushiki Kaisha
InventorsKyota Yamada, Akira Komatsu
Life of this patent
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Abstract
Audio-band electromechanical vibration converter characterized in that a yoke having a magnetic pole and a magnetic gap formed therein is displaceably housed by a damper in a casing to which a vibration plate is attached; a coil attached to the casing is placed in said magnetic gap; and the casing gives an output of a mechanical vibration synchronized with a low-band audio-signal.
Claims24
Audio-band electromechanical vibration converter comprising:
- a flat hollow casing comprising upper and lower frames;
- a flat damper means which is held within said casing, its outer edge being attached to said casing and its middle portion being freely moveable in said casing;
- a yoke attached to the inner edge of said damper means which extends outside of the yoke, said yoke being held by said damper means within said casing such that said yoke can displace relative to said casing, said yoke having a magnetic pole and a magnetic gap which is formed on a plane containing said damper means;
- and
- a coil installed in said magnetic gap of said yoke, said coil being set on said plane;
- whereby a mechanical vibration is produced within said casing through relative displacement between said casing and said yoke, which results from magnetic interaction between the magnetic force developed in said coil and the magnetic force of said magnetic gap.
3 more elements
Audio vibration equipment comprising:
- a flat hollow casing;
- a flat damper means which is held within said casing, with its outer edge attached to said casing and its middle portion freely moveable in said casing;
- a yoke attached to the inner edge of said damper means which extends outside of the yoke, said yoke being held within the casing by said damper means such that said yoke can displace relative to said casing, said yoke having a magnetic pole and a magnetic gap which is formed on a plane containing said damper means;
- a coil set in said magnetic gap, said coil being set on said plane;
- and
- a vibration plate with said casing embedded therein, said casing connected to the vibration plate at a periphery of the casing, whereby a mechanical vibration which results from magnetic interaction between the magnetic force developed in said coil and the magnetic force of said magnetic gap is produced within said casing through relative displacement between said casing and said yoke, and transmitted to said vibration plate.
3 more elements
Dependencies are inferred from the claim text.