| 摘要 |
A printer can appropriately detect a tape type of a tape cassette without having to increase device size. An arm indicator portion indicating the tape type is provided on a side surface of a tape cassette installed in a cassette housing portion. A platen roller (15) is supported by a roller holder (18) that freely rotates around a single shaft. A mechanical sensor (23) is supported by a sensor holder (19) that can move independently of the roller holder. The roller holder can rotate between positions where the platen roller presses the thermal head and where the platen roller is separated from the thermal head. The sensor holder can move between positions where the mechanical sensor presses the arm indicator portion and where the mechanical sensor is separated from the arm indicator portion.
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