US 11,895,388 B2
Shutter unit and image pickup apparatus
Keisuke Adachi, Tokyo (JP); Yuji Ueda, Tokyo (JP); Jun Kawanami, Kanagawa (JP); and Yoshiyuki Matsumoto, Kanagawa (JP)
Assigned to Canon Kabushiki Kaisha, Tokyo (JP)
Filed by CANON KABUSHIKI KAISHA, Tokyo (JP)
Filed on Jul. 12, 2022, as Appl. No. 17/862,484.
Claims priority of application No. 2021-117550 (JP), filed on Jul. 16, 2021.
Prior Publication US 2023/0016129 A1, Jan. 19, 2023
Int. Cl. H04N 23/55 (2023.01); G03B 9/40 (2021.01)
CPC H04N 23/55 (2023.01) [G03B 9/40 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A shutter unit comprising:
a base plate on which an opening is formed;
a first blade member configured to be movable between a closed state in which the first blade member closes the opening and a retracted state in which the first blade member retracts from the opening;
a first driving member configured to be biased in a first direction by a first biasing member;
a second driving member configured to be biased by a second biasing member in a second direction opposite to the first direction;
a first charging member configured to cause the first driving member to move in the second direction against a biasing force on the first driving member of the first biasing member;
a second charging member configured to cause the second driving member to move in the first direction against a biasing force on the second driving member of the second biasing member; and
a motor configured to supply a driving force to the first charging member and the second charging member,
wherein in a case where the first charging member causes the first driving member to move, the motor rotates in a direction opposite to a rotation direction in a case where the second charging member causes the second driving member to move.