Invention Grant
- Patent Title: Vibration actuator
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Application No.: US16132741Application Date: 2018-09-17
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Publication No.: US10406559B2Publication Date: 2019-09-10
- Inventor: Shinsuke Okayasu
- Applicant: Nidec Copal Corporation
- Applicant Address: JP Tokyo
- Assignee: Nidec Copal Corporation
- Current Assignee: Nidec Copal Corporation
- Current Assignee Address: JP Tokyo
- Agency: Troutman Sanders LLP
- Priority: JP2017-188915 20170928
- Main IPC: H04R9/02
- IPC: H04R9/02 ; B06B1/04 ; F16F15/03 ; F16F9/53 ; B05D5/08 ; H04R9/04

Abstract:
A vibration actuator having a stationary element; a movable element that is supported elastically so as to enable vibration on the stationary element; and a driving source for causing reciprocating vibration of the movable element in relation to the stationary element, wherein: the movable element comprises an opposed face that opposes an opposing face of the stationary element; a magnetic fluid that has viscosity is filled into a gap between the opposing face and the opposed face and is attracted magnetically to at least either the opposing face or the opposed face; and on the other of the opposing face or the opposed face, a holding region for retaining the magnetic fluid is provided, and a lipophobic surface, for repelling the magnetic fluid is provided so as to surround the holding region.
Public/Granted literature
- US20190091725A1 VIBRATION ACTUATOR Public/Granted day:2019-03-28
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