US 7,572,072 B2
Lens barrier driving device, lens barrel, and image pickup apparatus
Toshiyuki Yasuda, Kawasaki (Japan)
Assigned to Canon Kabushiki Kaisha, Tokyo (Japan)
Filed on Jun. 30, 2006, as Appl. No. 11/479,898.
Claims priority of application No. 2005-193824 (JP), filed on Jul. 01, 2005.
Prior Publication US 2007/0003273 A1, Jan. 04, 2007
Int. Cl. G03B 17/04 (2006.01); G02B 7/02 (2006.01)
U.S. Cl. 396—349  [359/819] 19 Claims
OG exemplary drawing
 
1. A lens barrier driving device driving a lens barrier which is disposed on an object side of a lens and is openable and closable, the lens barrier driving device comprising:
a transmission member that transmits power to a barrier driving member which opens and closes said lens barrier;
a cam member that is able to engage with said transmission member;
a first member that holds said cam member; and
a second member that is provided with a penetrating portion;
wherein said penetrating portion is disposed between said lens barrier and said first member and said transmission member comprises a rib portion that penetrates said penetrating portion and a light shielding portion that shields incident light through said penetrating portion.