Canon Kabushiki Kaisha

Canon Denshi Kabushiki Kaisha

Jun Kawanami

Keisuke Adachi

Rentaro Imai

Koichi Shimada

Yuuki Niwamae

Yoshiyuki Matsumoto

Yuji Ueda

Yoshihiro Sekiya

A shutter unit includes a base plate having an opening, a first blade member movable between a closed state and a retracted state, a first driving member biased by a first biasing member, a second driving member biased by a second biasing member, a first charging member configured to cause the first driving member to move in the second direction against a biasing force, a second charging member configured to cause the second driving member to move in the first direction against a biasing force, and a motor configured to supply a driving force to the first and second charging members. 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.

Shutter unit and image pickup apparatus

A shutter apparatus includes a front blade unit and a rear blade unit configured to open and close an opening for exposure control, a front drive member and a rear drive member configured to drive the front blade unit and the rear blade unit between an open position and a closed position of the opening, respectively, a front cam gear and a rear cam gear configured to charge the front drive member and the rear drive member, respectively, a front driving source and a rear driving source connected to and configured to rotate the front cam gear and the rear cam gear, respectively, and a controller configured to control the front driving source and the rear driving source based on an imaging condition so as to change driving times of the front blade unit and the rear blade unit.

Shutter apparatus and image pickup apparatus

A shutter apparatus includes a shutter base plate having an aperture, a blade group configured to open and close the aperture, a blade driving member configured to drive the blade group, a charge lever configured to rotate the blade driving member, a first roller which is attached to a first axis portion extending from the blade driving member and abuts against the charge lever, a cam member configured to rotate the charge lever, and a second roller which is attached to a second axis portion extending from the charge lever and is configured to trace a cam portion formed on the cam member. The cam member has a flange protruding from the cam portion to periphery of the cam member. And the cam member is arranged so that the second roller is overlapped with the flange in an extending direction of the second axis portion.

Shutter apparatus and image-pickup apparatus having the same

An image pickup apparatus with an AF sensor unit fixed thereto promptly with high precision by a parallax adjustment method. The image pickup apparatus with the AF sensor has a stationary cylinder. The stationary cylinder constitutes an image pickup lens barrel with a first axis and a second axis that are perpendicular to an optical axis of the lens barrel and are perpendicular to each other. An AF sensor holder is configured to hold said AF sensor. An AF sensor holder-mounting unit is mounted on the stationary cylinder through a first axis rotation-adjusting mechanism rotatably with respect to the first axis, and configured to support said AF sensor holder through a second axis rotation-adjusting mechanism rotatably with respect to the second axis. The first axis rotation-adjusting mechanism and the second axis rotation-adjusting mechanism are directed in the same direction at operation sides thereof, respectively.

Growing community of inventors

Yokohama, Japan

Jun Kawanami