Patent ID: 7097036

Claim:
A cassette storing system comprising: a) a housing case including: an upper lid member having a top plate provided with case stopper recesses and a protrusion-and-recess pattern, and a first lower case main body having a bottom plate provided with case stopper protrusions; and b) a cassette having a reel and a magnetic tape, said cassette including: a top surface provided with a protrusion-and-recess pattern and cassette stopper recesses, and a bottom surface provided with cassette stopper protrusions; wherein the protrusion-and-recess pattern on the housing case indicates a cassette housing direction and is similar to the protrusion-and-recess pattern on the cassette; wherein 1) when the upper lid member of the housing case is in a closed position with respect to the lower case main body, the cassette is not within the housing case, and the housing case is stacked on top of the cassette, the case stopper protrusions are fitted into the cassette stopper recesses , and 2) when the upper lid member of the housing case is in a closed position with respect to the lower case main body, and the cassette is stacked on top of the housing case, the cassette stopper protrusions are fitted into the case stopper recesses.