Cylindrical coreless vibrating motor
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United States of America Patent
Stats
-
Mar 30, 1999
Grant Date -
N/A
app pub date -
Oct 23, 1995
filing date -
Oct 23, 1995
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A coreless motor device having a rotor comprised of a cylindrical coil, a coil support, a rotary shaft inserted and stabilized in the center of the coil support, and a commutator installed either on the coil support or rotary shaft is disclosed. A cylindrical field magnet is positioned on the inside of the cylindrical coil, and one end of the cylindrical field magnet is affixed at a bottom of a cylindrical housing that surrounds the outer circumference of the cylindrical coil. The rotary shaft of the motor is supported by a thrust bearing at the end of the cylindrical field magnet opposite the end that is affixed at the bottom of the cylindrical housing, and it is also supported by a multiple number of radial bearings installed at intervals on the upper part of the cylindrical housing.
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