Motor for providing a vibrating action for a radio pager
AssigneeNEC Corporation
InventorMasahiro Fujii
Life of this patent
Estimating the term…
Abstract
A motor incorporated in a radio pager provides a vibrating action of the type used for alerting the user that he had received a call. A stator is affixed to the bottom of a casing. A rotor is in the form of a disk mounted on and affixed to a rotary a shaft and provided with coils therein. A weight having a sectorial shape is mounted on the top of the rotor in one embodiment and at the center of the coils in another embodiment.
Claims11
A rotor assembly of a motor for providing a vibrating action, comprising:
- a flat cylindrical rotor having coils disposed around the entire periphery thereof and being fixed to and mounted on a shaft which turn as a unit inside of a casing;
- and
- at least an eccentric weight embedded entirely within said coils and said said rotor.
A motor for providing a vibrating action incorporated in a radio pager, comprising:
- a casing;
- a stator affixed inside of said casing and comprising a permanent magnet having a plurality of poles;
- a rotor mounted on and affixed to a shaft rotatably mounted inside of said casing, said rotor facing said stator, said rotor being provided with a plurality of coils which are uniformly arranged around a circumference of said rotor;
- and
- a weight eccentrically mounted within an arcuate part of said rotor, thereby giving an eccentric rotation having a vibrating action.
A motor for providing a vibrating action incorporated in a radio pager, said motor comprising:
- a casing;
- a stator affixed inside of said casing and comprising a permanent magnet having a plurality of poles;
- a rotor rotatably mounted on a shaft inside of said casing while facing said stator, said rotor being provided with a plurality of coils uniformly distributed around a circumference of said rotor;
- and
- a weight buried within a sector part of said rotor to cause an eccentric action upon a rotation of said rotor.
Dependencies are inferred from the claim text.