| 摘要 |
A printer using a thermal head to sublime ink on an ink ribbon includes a cylindrical ribbon core around which the ink ribbon is wound, a rotating shaft to rotate the ribbon core, first and second magnets to generate magnetic force lines in a space surrounded by an inner peripheral face of the ribbon core, and a magnet sensor located in the space to detect the magnetic force lines generated by the first and second magnets only when the magnetic force lines are set in prescribed directions by rotation of the ribbon core. The ribbon core includes a cylindrical outer core with an outside peripheral surface around which the ink ribbon is wound and a cylindrical inner core with an outside peripheral surface to which the first and second magnets are fixed. The inner core with the first and second magnets fixed thereto is installed inside the outer core.
|
