Title:
VIBRATION ACTUATOR
Document Type and Number:
WIPO Patent Application WO/2019/130705
Kind Code:
A1
Abstract:
[Problem] To provide a low-cost vibration actuator which has a simple structure and which is less likely to cause an abnormal sound. [Solution] First and second dampers 51, 61 are disposed so that spiral arm sections 53, 55, 57 of the first damper (leaf spring) 55 and spiral arm sections 63, 65, 67 of the second damper (leaf spring) 61 have opposite spiral directions. The arm sections 53, 55, 57 of the first damper 55 and the arm sections 63, 65, 67 of the second damper 61 include stress concentration portions where stress increases locally at the time of force loading thereon. The stress concentration portions of the arm sections are located on a plurality of straight lines orthogonal to a vibration axis line O.
Inventors:
CHIBA YUSUKE (JP)
Application Number:
PCT/JP2018/036661
Publication Date:
July 04, 2019
Filing Date:
October 01, 2018
Export Citation:
Assignee:
FOSTER ELECTRIC CO LTD (JP)
International Classes:
B06B1/04; H02K33/02
Foreign References:
| JP2005013836A | 2005-01-20 | |||
| JP2000050609A | 2000-02-18 | |||
| JP2015135124A | 2015-07-27 | |||
| JP2011153672A | 2011-08-11 |
Attorney, Agent or Firm:
IJIMA, Tohji (JP)
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