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Title:
LENS CHANGE-OVER DEVICE AND PROJECTOR
Document Type and Number:
Japanese Patent JP2015081998
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To effectively eliminate a backlash, easily secure excellent positioning accuracy with respect to one part of a projection lens or all thereof, and attain a quick change-over without need for labor upon changing over the one part of the projection lens or all thereof.SOLUTION: Provided are: a lens support mechanism part 2 that movably supports a movable lens unit Um (one part Lp of a projection lens L or all thereof); a drive mechanism part 3 that moves the movable lens unit Um; a regulation mechanism part 4 that regulates a movement range where the movable lens unit Um moves; and a backlash absorption mechanism part 5 that, when moving the movable lens unit Um from a non-use position Xr to a use position Xu, increases a load upon the movement right in front of the use position Xu, and maintains the load increased in the use position Xu at a prescribed magnitude.

Inventors:
MORIKUNI HIDETOKI
YAMADA AKIRA
KITAJIMA TOMOAKI
Application Number:
JP2013219348A
Publication Date:
April 27, 2015
Filing Date:
October 22, 2013
Export Citation:
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Assignee:
SEIKO EPSON CORP
COSINA CO
International Classes:
G03B21/14; G02B7/04; G03B21/00
Domestic Patent References:
JP2013092712A2013-05-16
JP2008298856A2008-12-11
JP2009282075A2009-12-03
JP2002206615A2002-07-26
JP2007310167A2007-11-29
JPS55126229A1980-09-29
JP2001201676A2001-07-27
JPH02199416A1990-08-07
JP2010054877A2010-03-11
JP2011150064A2011-08-04
JP2008225030A2008-09-25
JP2013092712A2013-05-16
JP2008298856A2008-12-11
JP2009282075A2009-12-03
JP2002206615A2002-07-26
JP2007310167A2007-11-29
JPS55126229A1980-09-29
JP2001201676A2001-07-27
JPH02199416A1990-08-07
Attorney, Agent or Firm:
Shimoda Shigeru



 
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