Cassette slant insertion preventing stopper for cassette type recording/reproducing apparatus

A cassette type recording/reproducing apparatus including: a cassette insertion port formed on a front panel; a cassette stage which is reciprocatively moved between a cassette insertion position at which a tape cassette is inserted from said cassette insertion port, and a cassette mount position at which the inserted tape cassette is subjected to recording/reproducing operation; a cassette press member which is secured to said cassette stage and adapted to press a tape cassette from the upper side thereof at a position which is nearer to a cassette discharge direction side than the front lid of the tape cassette, the tape cassette being inserted from said cassette insertion port into said cassette stage; a cassette slant insertion preventing stopper which is secured to said cassette stage and adapted to relatively press a front lid portion of a tape cassette from the upper side thereof, the tape cassette being inserted from said cassette insertion port into said cassette stage, whereby the tape cassette is prevented from being obliquely inserted in a forward and upward direction into said cassette stage and wherein said cassette slant insertion preventing stopper is freely rotatable secured to a front lid/closing lever which is freely rotatable secured to said cassette stage; and a cassette slant insertion preventing mechanism for moving said cassette slant insertion preventing stopper to the upper side of said cassette stage when said cassette stage is moved from the cassette insertion port to the cassette mount position.