Title:
OPTICAL UNIT AND ENDOSCOPE
Document Type and Number:
WIPO Patent Application WO/2018/229865
Kind Code:
A1
Abstract:
An optical unit 30 is equipped with: a moving frame 35 that is disposed so as to freely advance and retract within a fixed frame 41, and that retains a moving lens 33; an actuator that drives the moving frame along an optical axis O of the moving lens; a plurality of spheres 61, 62 enabling the moving frame to slide; a plurality of guide grooves 63, 64 for guiding the plurality of spheres; a plurality of magnets 38a, 38b, 39a, 39b that are disposed so as to produce magnetic force in a direction orthogonal to an imaging optical axis; and magnetic members 51, 51 that are disposed at positions opposing the plurality of magnets, cancel out forces of attraction F1, F2 generated in opposite directions between the plurality of magnets due to magnetic force, and cause the moving frame to produce an urging force solely in the direction in which the plurality of spheres are brought to bear against the guide grooves.
Inventors:
SAITO KANAKO (JP)
SAITO TAKESHI
SAITO TAKESHI
Application Number:
PCT/JP2017/021802
Publication Date:
December 20, 2018
Filing Date:
June 13, 2017
Export Citation:
Assignee:
OLYMPUS CORP (JP)
International Classes:
G02B7/04
Domestic Patent References:
| WO2016132883A1 | 2016-08-25 |
Foreign References:
| JP2015141389A | 2015-08-03 |
Attorney, Agent or Firm:
ITOH Susumu (JP)
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