Patent ID: 6672777
Filing Date: 2004-01-06
Classification: G03B

Abstract:
A lens barrier device comprising:a barrier that is movable between a position covering a front of a taking lens and a position withdrawn from the front of said taking lens; an engagement member that is capable of being engaged with a filter screwthread of said taking lens for holding said barrier relative to said taking lens; a rotary shaft that rotates said barrier between said position covering the front of said taking lens and said position withdrawn from the front of said taking lens; and click action means for holding said barrier in one of said position covering the front of said taking lens and said position withdrawn from the front of said taking lens; wherein said click action means includes a first recess that holds said barrier in said position covering the front of said taking lens, a second recess that holds said barrier in said position withdrawn from the front of said taking lens, and a first click action engagement member that engages one of said first and second recesses; and wherein said click action means includes a third recess arranged between said first recess and said second recess along a rotation path of said barrier, and a second click action engagement member that engages with said third recess, and when said first click action engagement member is between said first recess and said second recess and engagement of said second click action engagement member with said third recess is commenced, said second click action engagement member guides said first click action engagement member into said second recess and guides said barrier into said position withdrawn from the front of said taking lens.