Vibration motor
AssigneeLG Innotek Co., Ltd.
InventorYoung Il Park
Life of this patent
Estimating the term…
Abstract
A vibration motor includes: a lower case provided with a lower board; an upper case coupled with the lower case; a four-pole magnet provided on the lower case; a shaft supported between the lower case and the upper case; a rotor rotatably supported by the shaft with an eccentricity, in which a pair of coils is provided in the rotor at an angle ranging form 135° to 142° between centerlines thereof; a commutator formed on a bottom of the rotor with six segments; and a pair of brushes having lower parts contacted with the lower board and upper parts contacted with the segments of the commutator at an angle of 90° therebetween.
Claims25
A vibration motor comprising:
- a magnet having alternate N and S poles;
- a rotor including a pair of coils fixed at an angle ranging from 135° to 142° between centerlines of the respective coils based on the rotor center, the rotor being rotated using electromagnetic force between a magnetic flux of the magnet and a magnetic flux which is generated from the coils;
- a shaft provided to support the rotor;
- a commutator having a plurality of segments, disposed on a predetermined portion of the rotor and electrically connected with the coils;
- and
- a pair of brushes provided to apply a current to the commutator.
A vibration motor comprising:
- a case;
- a magnet provided on an inner surface of the case;
- a rotor which is eccentrically rotated by an electromagnetic force resulted from interaction with the magnet;
- a pair of coils fixed in one portion of the rotor at an angle ranging from 135° to 142° between centerlines of the respective coils based on the rotor center;
- a weight formed between the pair of coils;
- a shaft inserted in the rotor and supported by the case;
- a commutator having a plurality of segments, disposed on the other portion of the rotor and electrically connected with the coils;
- and
- a pair of brushes for applying a current to the commutator.
A vibration motor comprising:
- a shaft supported between coupled upper and lower cases;
- a magnet provided on the lower case;
- a rotor rotatably supported by the shaft with eccentricity;
- and
- brushes for applying an electric potential to a commutator formed on the rotor,
- wherein the rotor includes an upper board provided on a bottom of the rotor, first and second coils provided in a top of the rotor, a weight provided between the two coils, and a commutator provided with a plurality of segments on a bottom of the rotor;
- wherein the two coils are fixed to the top of the rotor at an angle ranging from 135° to 142° between centerlines of the respective coils based on the rotor center.
Dependencies are inferred from the claim text.