| 摘要 |
A thermal printer unit according to the invention includes a thermal head, a platen roller which is disposed while facing the thermal head, a support member which fixes the thermal head while thermal transfer ribbon and receptor paper are pressurized and nipped between the thermal head and the platen roller, a conveyance mechanism which conveys the thermal transfer ribbon and the receptor paper using the thermal head and the platen roller, an engaging groove which prevents the thermal head from moving in a paper conveyance direction by the support member, and a retaining portion which prevents the thermal head from moving in a rotating direction, the movement of the thermal head in the rotating direction being generated according to rotation of the platen roller.
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