| 摘要 |
<p>To provide a platen retaining structure capable of easily attaching and detaching a platen with a small and simple structure, and having high reliability in retaining the platen. A shaft portion 2a of a platen roller 2 is inserted into a notch 7 of a frame 3. An escaping direction from the notch 7 is regulated by a pawl 8. A thermal head 2 is brought into press contact with the platen roller 2 by a spring member 4, and the shaft portion 2a is pressed at a predetermined retaining position in the notch 7 by an urging force applied from the spring member 4 to the platen roller 2 through a thermal head 1. When the thermal head 1 is moved against a spring force of the spring member 4, a spring member 10 allows the release arm 9 to follow the thermal head 1 to swing. An engagement portion 9b of the release arm 9 which swings by following the thermal head 1 is engaged with the shaft portion 2a, and is pressed out in a direction of escaping from an opening portion of the notch 7 (direction of A).</p> |
