Shutter unit and image pickup apparatus

A shutter unit comprising:

• a base plate on which an opening is formed;
• at least one blade member;
• a driving member configured to be rotatably supported by the base plate and to drive, in imaging, the blade member from a standby position to a traveling completion position by using a biasing force of a biasing member;
• a brake unit including a braking member configured to cause the driving member to decelerate by coming into contact with the driving member;
• and
• a charging member configured to:
• cause the driving member to operate from the traveling completion position to a set position against the biasing force of the biasing member and thereafter cause the driving member to operate to the standby position;
• and
• cause the braking member to operate from the traveling completion position to the standby position while causing the driving member to operate from the set position to the standby position,
• wherein no component is placed on a projection area of the brake unit in a direction in which the brake unit is detached.

An image pickup apparatus comprising:

• a shutter unit;
• and
• an image sensor configured to photoelectrically convert an optical image formed via an image pickup optical system,
• wherein the shutter unit includes:
• a base plate on which an opening is formed;
• at least one blade member;
• a driving member configured to be rotatably supported by the base plate and to drive, in imaging, the blade member from a standby position to a traveling completion position by using a biasing force of a biasing member;
• a braking member configured to cause the driving member to decelerate by coming into contact with the driving member;
• and
• a charging member configured to:
• cause the driving member to operate to the standby position after causing the driving member to operate from the traveling completion position to a set position against the biasing force of the biasing member;
• and
• cause the braking member to operate from the traveling completion position to the standby position while causing the driving member to operate from the set position to the standby position.