ROOF TYPE REFLECTION MIRROR AND SINGLE-LENS REFLEX CAMERA USING THE SAME AS WELL AS METAL MOLD FOR FORMING ROOF TYPE REFLECTION MIRROR

摘要

PROBLEM TO BE SOLVED: To provide a roof type reflection mirror which may be mounted without increasing the size of a single-lens reflex camera while assuring the draft grade β in molding. ;SOLUTION: This roof type reflection mirror 20 used for the finder of the single-lens reflex camera is formed by integrally molding a roof part 21 consisting of two reflection surfaces 21A, 21B intersected perpendicularly with each other and a first side wall part 22 and second side wall part 23 which are respectively continuous with these reflection surfaces 21A, 21B and have about 90° angle formed with the plane X parallel with the focal plate of the camera. At least the first side wall part 22 is formed by widening the base apart 22A thereof to the outer side in such a manner that the angle α formed by the first side wall part 22 and the second side wall part 23 with each other attains a prescribed angle or above. The front surface shape of this part is so formed as to be asymmetrical with respect to the plane Y which passes the ridge line Z of the roof part 21 and intersects perpendicularly with the focal plate.;COPYRIGHT: (C)1997,JPO