Flat type vibration motor
AssigneeSamsung Electro-Mechanics Co., Ltd.
InventorsJoon Choi, Ki Hyung Kim
Life of this patent
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Abstract
A flat type vibration motor includes a rotor rotatably assembled between a stator and a housing, wherein the rotor includes an insulator of eccentric mass integrally containing at least a winding coil corresponding to the magnet and a weight arranged eccentrically adjacent to the winding coils, and an upper board mounted on an underside of the insulator; a plurality of brushes; a plurality of annular slip rings arranged on an underside of the upper board to be concentric with the shaft, each of the rings contacting an upper end of each of the brushes; and an IC chip for converting the direction of electric current flowing through the winding coils by alternating the polarity of electric current which is introduced to the slip rings via the brushes and then supplied to the winding coil.
Claims18
A flat type vibration motor for generating vibration, comprising:
- a stator including a lower board with a terminal unit, the terminal unit being supplied with electric current from an external power supply, and a magnet having N and S poles alternatingly magnetized in a periphery of the magnet;
- a shaft having a lower end fixedly pressed into an upper central portion of the stator and an upper end assembled into a lower central portion of a housing;
- a rotor rotatably assembled between the stator and the housing, wherein the rotor includes an insulator of eccentric mass, which integrally contains at least one winding coil corresponding to the magnet and a weight arranged eccentrically adjacent to the winding coil, and an upper board mounted on an underside of the insulator;
- a plurality of brushes electrically connected with the terminal unit and having lower ends fixed to the stator;
- a plurality of annular slip rings arranged on an underside of the upper board to have an axis concentric with the shaft, each of the rings contacting an upper end of each of the brushes;
- and
- an Integrated Circuit (IC) chip for converting the direction of electric current flowing through the winding coil by alternating the polarity of electric current which is introduced to the slip rings via the brushes and then supplied to the winding coil.
A flat type vibration motor for generating vibration, comprising:
- a housing;
- a shaft having an upper end supported by the housing;
- a rotor rotatably arranged within the housing, and including at least one winding coil, a weight eccentrically arranged adjacent to the winding coil and a plurality of annular slip rings arranged on an underside of an upper base,
- an Integrated Circuit (IC) chip arranged in an upper face of the upper base for converting the direction of current flowing through the winding coil;
- a stator having a magnet arranged in a lower base thereof, the magnet having N and S poles alternatingly magnetized in an outer periphery thereof;
- and
- a plurality of brushes having one ends correspondingly contacted with the slip rings and the other ends electrically connected with a terminal unit which is supplied with electric current.
Dependencies are inferred from the claim text.