JP2009031513A5 - - Google Patents

Claims (4)

A driving member for a leading blade that has a driven portion and drives the leading blade group;
A trailing blade driving member that has a driven portion and drives the trailing blade group;
A first cam surface abutting on the leading blade driving member and a second cam surface abutting on the trailing blade driving member, the leading blade driving member and the trailing blade driving; A first cam gear that performs shutter charge and release operation by rotating each driven portion of the member;
A mirror driving member for driving the quick return mirror;
A second cam gear coupled to the first cam gear and driven simultaneously with the first cam gear to displace the mirror driving member between a first position and a second position;
The first cam gear makes a transition in the order of the first phase, the second phase, and the third phase by the rotation of the first cam gear,
In the first phase, the first cam surface and the driven portion of the leading blade driving member are in contact with each other, and the second cam surface and the driven portion of the trailing blade driving member are The second cam gear is in a state of displacing the mirror driving member to the first position;
In the second phase, the first cam gear rotates so that the contact between the first cam surface and the driven portion of the leading blade driving member is released, and the second cam The second cam gear is in a state of displacing the mirror driving member to the second position, and the driven portion of the driving member for the trailing blades abuts the surface.
In the third phase, the first cam gear rotates to release the contact between the first cam surface and the driven portion of the leading blade driving member, and the first cam gear. And the contact between the second cam surface and the driven portion of the trailing blade driving member is released, and the second cam gear moves the mirror driving member to the second position. A shutter device that is in a state of being displaced.   The first cam gear is between the leading blade driving member and the trailing blade driving member, and the center of rotation of the first cam gear is the leading blade driving member and the trailing blade. The shutter device according to claim 1, wherein the shutter device is disposed at a position opposite to the photographing optical axis with respect to a line connecting the rotation centers of the driving members.   The second cam gear is rotated via a transmission member connected to a motor, and the first cam gear is applied with a voltage applied to the motor when the first phase shifts directly from the first phase to the third phase. The shutter device according to claim 1, wherein a voltage applied to the motor at the time of transition from a phase to the second phase is lower.   An imaging apparatus comprising the shutter device according to any one of claims 1 to 3.