Cassette setting device

A cassette setting device for setting a cassette at a predetermined position in a cassette utilizing apparatus, the cassette housing a sheet-shaped image recording medium therein and being provided with an opening, through which the image recording medium is to be fed into and out of the cassette, at one end, the cassette setting device setting the cassette such that the positions of two side ends of the cassette, which side ends are normal to the one end of the cassette provided with the opening, may be adjusted by a pair of guide members, and such that the other end portion of the cassette may be exposed to the exterior from a cassette setting port of the cassette utilizing apparatus,

• wherein the improvement comprises the provision of;
• i) a stationary light shielding member, which prevents external light from entering from the side of the other end portion of the cassette to the side of the one end of the cassette when the cassette is set,
• ii) a pair of guide members, which serves as the pair of the guide members for a large-sized cassette having a comparatively large width,
• iii) a pair of guide members, which serves as the pair of the guide members for a small-sized cassette having a comparatively small width, at least either one of said pair of said guide members for the small-sized cassette, which one is located at a position for the setting of the large-sized cassette, being capable of moving between a retracted position, that does not interfere with the large-sized cassette, and a position for the guiding of the small-sized cassette,
• iv) a movable light shielding member, which is located in the vicinity of the cassette setting port, which prevents external light from entering from the cassette setting port to the side of the one end of the cassette when the small-sized cassette is set, and which is moved by the large-sized cassette to a retracted position, that does not obstruct the passage of the large-sized cassette, when the large-sized cassette passes through the location of the movable light shielding member, and
• v) an interlocking mechanism for interlocking said movable light shielding member and said guide member for the small-sized cassette, which guide member is located at the position for the setting of the large-sized cassette, with each other such that said guide member for the small-sized cassette may be moved to the retracted position thereof when said movable light shielding member is moved to the retracted position thereof.