Title:
LINEAR VIBRATION MOTOR
Document Type and Number:
WIPO Patent Application WO/2017/057193
Kind Code:
A1
Abstract:
The present invention makes it possible, in a linear vibration motor, to suppress a decrease in driving force while increasing the total mass of a movable element and obtaining effective vibration. This linear vibration motor 1 is provided with a movable element 2, which is provided with a magnet portion 2A and a weight portion 2B, a frame 3, which supports the movable element so as to be capable of reciprocating vibration, a coil 4, which is fixed to the frame 3 and applies to the magnet portion 2A a driving force that vibrates the movable element 2, and an elastic member 5, which applies to the movable element 2 an elastic force that repels the driving force, wherein in the magnet portion 2A, a plurality of magnet pieces 11, 12, 13 that are magnetized along the direction of vibration of the movable element 2 are aligned along the direction of vibration of the movable element 2 such that adjacent magnetic poles are like poles, and the weight portion 2B is provided with end weights 20 that are disposed at both ends in the direction of vibration of the movable element 2 and a middle weight 21 that is disposed between the magnet pieces 11, 12, 13.
Inventors:
KATADA YOSHINORI (JP)
ODAJIMA SHIN (JP)
ISHII SHIORI (JP)
SEGAWA NOBORU (JP)
ODAJIMA SHIN (JP)
ISHII SHIORI (JP)
SEGAWA NOBORU (JP)
Application Number:
PCT/JP2016/078068
Publication Date:
April 06, 2017
Filing Date:
September 23, 2016
Export Citation:
Assignee:
NIDEC COPAL CORP (JP)
International Classes:
B06B1/04; H02K33/02; H02K33/14
Foreign References:
| JP2015095943A | 2015-05-18 | |||
| JP2011205870A | 2011-10-13 | |||
| JP2015091585A | 2015-05-14 |
Attorney, Agent or Firm:
EICHI PATENT & TRADEMARK CORP. (JP)
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