Invention Grant
- Patent Title: Vibration motor
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Application No.: US15662321Application Date: 2017-07-28
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Publication No.: US10399122B2Publication Date: 2019-09-03
- Inventor: Tomohiro Akanuma , Mitsuru Ol , Satoshi Nakazawa
- Applicant: Nidec Seimitsu Corporation
- Applicant Address: JP Nagano
- Assignee: NIDEC SEIMITSU CORPORATION
- Current Assignee: NIDEC SEIMITSU CORPORATION
- Current Assignee Address: JP Nagano
- Agency: Keating & Bennett, LLP
- Priority: JP2016-166858 20160829
- Main IPC: H02K33/16
- IPC: H02K33/16 ; B06B1/04

Abstract:
A vibration motor includes a shaft, a stationary portion, a vibrating body, and an elastic member. The vibrating body includes a weight, first magnets, magnetic bodies, and one or more second magnets. Each first magnet has a ring shape and is magnetized in an inner or outer circumferential direction. Each magnetic body has a ring shape and is disposed between the shaft and a corresponding one of the first magnets. The one or more second magnets are magnetized in one direction, have a ring shape, and are interposed between the magnetic bodies corresponding thereto that are adjacent to each other in the one direction. The adjacent first magnets in the one direction are such that magnetic polarities of one of the first magnets at inner and outer circumferences thereof are opposite to magnetic polarities of another of the first magnets adjacent thereto at inner and outer circumferences thereof.
Public/Granted literature
- US20180056329A1 VIBRATION MOTOR Public/Granted day:2018-03-01
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