| 摘要 |
PROBLEM TO BE SOLVED: To provide an adjustment mechanism which can adjust the pressing force of a thermal head according to paper thickness, and in addition, which is suitable for a small thermal printer. SOLUTION: The small thermal printer is constituted so that a platen roller (11) is attachable to and detachable from arms for rotatably holding the platen roller, and room at the back of a thermal head where a spring (16) for pressing the thermal head (14) toward the platen roller is disposed is narrow, wherein an auxiliary plate for receiving the spring is provided at the back of the thermal head, the auxiliary plate (13) is constituted to be approachable to or separable from a head support plate (15), and means (18, 41) which can adjust a position of the auxiliary plate with respect to a position of the head support plate (15) is arranged. COPYRIGHT: (C)2009,JPO&INPIT
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