JP2003291458A5 - - Google Patents

Claims (4)

  An open / close shutter that can change the aperture ratio is provided at the intake port for taking in air from the outside air to the inside of the device, the exhaust port for releasing the air inside the device, or the air passage inside the device. An image forming apparatus, wherein the aperture ratio of the open / close shutter is changed between when the shutter is stopped.   A switch unit operated by a user and a power source unit that supplies power to the apparatus are connected via a connecting member, and the opening / closing shutter changes the aperture ratio in conjunction with the operation of the switch unit or the connecting member. 2. The image forming apparatus according to claim 1, wherein when the power is turned on, the aperture ratio is decreased, and when the power is turned off, the aperture ratio is increased to expand outside air and an effective air path into the apparatus.   During operation, the aperture ratio is lowered and the fan is operated. During standby, the fan speed is reduced or stopped, and the aperture ratio of the open / close shutter is changed according to the fan speed or the wind speed to enter the outside air and the inside of the device. The image forming apparatus according to claim 1, wherein the effective air path is expanded.   A rack is provided in a part of the link member to which the opening / closing shutter is linked, and the opening / closing shutter is opened by transmitting the drive from the driving source of the image forming apparatus through the torque limiter, and the drive is not transmitted. The image forming apparatus according to claim 1, wherein the opening / closing shutter is returned to a closed state by a spring force.