Title:
STIFFNESS-VARIABLE DEVICE AND ENDOSCOPE
Document Type and Number:
WIPO Patent Application WO/2020/161815
Kind Code:
A1
Abstract:
This stiffness-variable device includes a helically-shaped coil part obtained by winding a plurality of SMA wires made from a shape-memory alloy around a shaft at a first pitch in such a manner as to cause the wires to overlap each other in a prescribed axial direction, wherein each of the SMA wires comprises: at least one coil unit which remembers a helical shape having a narrower pitch than the first pitch and which tries to transform into the remembered shape at a prescribed temperature or higher; and a heating part for heating the coil part.
Inventors:
OKITA TATSUHIKO (JP)
Application Number:
PCT/JP2019/004184
Publication Date:
August 13, 2020
Filing Date:
February 06, 2019
Export Citation:
Assignee:
OLYMPUS CORP (JP)
International Classes:
G02B23/24; A61B1/005
Foreign References:
| JP2016007434A | 2016-01-18 | |||
| JP2019001197A | 2019-01-10 | |||
| JP2014167775A | 2014-09-11 | |||
| JP2004121755A | 2004-04-22 | |||
| JPH05207967A | 1993-08-20 | |||
| JPH0667096A | 1994-03-11 | |||
| JP2000262464A | 2000-09-26 |
Attorney, Agent or Firm:
ITOH-SHIN PATENT OFFICE (JP)
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