Title:
SHAPE MEMORY ALLOY ACTUATOR
Document Type and Number:
WIPO Patent Application WO/2011/135921
Kind Code:
A1
Abstract:
A shape memory alloy actuator is configured so as to include: a shape memory alloy wire (11) inserted through the inside of a tube member (12); a movement body (14) which is moved in the direction in which the length of the shape memory alloy wire (11) changes, the movement of the movement body (14) being performed by the extension and contraction of the shape memory alloy wire (11); and an elastic member (15) which applies an external force to the movement body (14) in the direction in which the shape memory alloy wire (11) extends. The shape memory alloy actuator is also provided with a magnetic sensor configured so as to include: a magnetism section (19) which is moved as the movement body (14) moves; an excitation coil (17) which is provided so as to correspond to the magnetism section (19) and which magnetizes the magnetism section (19); and a detection coil (18) which outputs a voltage corresponding to the position thereof relative to the magnetism section.
Inventors:
MATSUKI Kaoru (43-2 Hatagaya 2-chome, Shibuya-k, Tokyo 72, 〒1510072, JP)
Application Number:
JP2011/054858
Publication Date:
November 03, 2011
Filing Date:
March 03, 2011
Export Citation:
Assignee:
OLYMPUS CORPORATION (43-2, Hatagaya 2-chome Shibuya-k, Tokyo 72, 〒1510072, JP)
オリンパス株式会社 (〒72 東京都渋谷区幡ヶ谷２丁目４３番２号 Tokyo, 〒1510072, JP)
オリンパス株式会社 (〒72 東京都渋谷区幡ヶ谷２丁目４３番２号 Tokyo, 〒1510072, JP)
International Classes:
F03G7/06; G05D3/00
Attorney, Agent or Firm:
SAITO Keisuke et al. (Surugadai-shita MK Bldg. 6F, 41-3 Kanda-jimbocho 1-chome, Chiyoda-k, Tokyo 51, 〒1010051, JP)
Claims: