Digital camera

Abstract

A digital camera includes: a light guide section that defines a space in which a light flux from a photographic lens to an imaging unit is guided; a mirror unit arranged inside the light guide section, that is adapted to rotate between a viewing position in which the mirror unit is inserted in a photographic light path from the photographic lens to the imaging unit to reflect the light flux and a photographing position in which the mirror unit is retracted from the photographic light path; a mirror unit control section that controls rotation of the mirror unit; a rotation instruction section that outputs a signal to rotate the mirror unit while no photography is performed to the mirror unit control section; and an opening section provided in the light guide section that discharges from the light guide section air that is moved by the rotation of the mirror unit.

1 . A digital camera, comprising:
 a light guide section that defines a space in which a light flux from a photographic lens to an imaging unit is guided;   a mirror unit arranged inside the light guide section, that is adapted to rotate between a viewing position in which the mirror unit is inserted in a photographic light path from the photographic lens to the imaging unit to reflect the light flux and a photographing position in which the mirror unit is retracted from the photographic light path;   a mirror unit control section that controls rotation of the mirror unit;   a rotation instruction section that outputs a signal to rotate the mirror unit while no photography is performed to the mirror unit control section; and   an opening section provided in the light guide section that discharges from the light guide section air that is moved by the rotation of the mirror unit.   
   
   
       2 . A digital camera according to  claim 1 , wherein
 the photographic lens is detachable from a camera body of the digital camera, and   the rotation instruction section outputs the signal to the mirror unit control section when the photographic lens is attached to the camera body of the digital camera.   
   
   
       3 . A digital camera according to  claim 1 , wherein
 the rotation instruction section outputs the signal to the mirror unit control section when power of the digital camera is turned ON or turned OFF.   
   
   
       4 . A digital camera according to  claim 1 , further comprising:
 an operation member that outputs a rotation command to rotate the mirror unit in response to an operation by a user, wherein   the rotation instruction section outputs the signal to the mirror unit control section in response to the command to rotate the mirror unit, and   the rotation instruction section outputs the signal to the mirror unit control section in response to the rotation command from the operation member.   
   
   
       5 . A digital camera according to  claim 1 , further comprising:
 a shutter arranged between the mirror unit and the imaging unit; and   a shutter control section that controls opening and closing operation of the shutter, wherein   the shutter control section controls the shutter to be changed from a state in which the shutter is closed to a state in which the shutter is opened during a time between a time before the mirror unit starts rotation from the viewing position to the photographing position and a time before the mirror unit reaches the photographing position after the mirror unit has started rotation thereof from the viewing position to the photographing position.   
   
   
       6 . A digital camera according to  claim 1 , further comprising:
 a shutter arranged between the mirror unit and the imaging unit; and   a shutter control section that controls opening and closing operation of the shutter, wherein   the shutter control section controls the shutter to be changed from a state in which the shutter is closed to a state in which the shutter is opened during a time between a time before the mirror unit starts rotation from the viewing position to the photographing position and a time before the mirror unit reaches the photographing position after the mirror unit has started rotation from the viewing position to the photographing position, and controls, after a predetermined time is reached from the state in which the shutter is opened, the shutter to be changed to a state in which the shutter is closed.   
   
   
       7 . A digital camera according to  claim 1 , further comprising:
 a shutter arranged between the mirror unit and the imaging unit; and   a shutter control section that controls opening and closing operation of the shutter, wherein   the shutter control section controls the shutter to be changed from a state in which the shutter is closed to a state in which the shutter is opened during a time between a time before the mirror unit starts rotation from the viewing position to the photographing position and a time before the mirror unit reaches the photographing position after the mirror unit has started rotation from the viewing position to the photographing position, and controls the shutter to be changed again to a state in which the shutter is closed.   
   
   
       8 . A digital camera according to  claim 1 , further comprising:
 a shutter arranged between the mirror unit and the imaging unit; and   a shutter control section that controls opening and closing operation of the shutter, wherein   the shutter control section controls the shutter to be changed from a state in which the shutter is closed to a state in which the shutter is opened during a time between a time before the mirror unit starts rotation from the viewing position to the photographing position and a time before the mirror unit reaches the photographing position after the mirror unit has started rotation from the viewing position to the photographing position, and thereafter controls the shutter to be changed again to a state in which the shutter is closed before a flow of air toward the imaging unit from a side of the photographic lens generated in the light guide section by rotation of the mirror unit from the viewing position to the photographing position reaches the shutter.