| 摘要 |
PROBLEM TO BE SOLVED: To simply change display contents by freely taking in and out a cassette case to and from a housing case. SOLUTION: A display window section and a display part introducing means are provided on the housing case and a cassette case is stored so as to be freely inserted into and taken out of the housing case. A display part is provided on the cassette case so that the part is exposed from the display window part while the cassette case is stored in the housing case. The display part introducing means makes the cassette case to be taken in and out to and from the housing case. The cassette case is provided with a pair of rollers that are opposing to each other and provided inside the case, a long wound sheet that is spread over the rollers and a display part shown on the surface of the sheet. The display part is exposed through the opening section formed on the cassette case.
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