| 摘要 |
A laser beam isolation includes a blocking unit having an at least partially metallic shutter disposed in a laser scanning unit to be movable between a first position to open a path of a laser beam and a second position to block the path of the laser beam. A magnetic unit is disposed opposite to the shutter at least one of a cover and an image forming unit of the device to actuate the shutter to move to the first position when the cover is closed, or when the image forming unit is mounted in the device. During an opening of the cover or a removal of the image forming unit, the blocking portion is moved to the second position by its own weight or center of gravity and blocks a laser beam of a light source from being emitted out of the laser scanning unit. |
