Patent ID: 7492383

Claim:
A thermal printer, comprising: a main body frame; a thermal head mounted to the main body frame; a platen roller disposed to be opposed to a printing surface of the thermal head, for sandwiching a thermal paper with the thermal head to feed the thermal paper; a lock arm swingably mounted to the main body frame, for locking the platen roller with the main body frame by pressing a shaft bearing which rotatably supports the platen roller against the thermal head; a swing arm that supports the shaft bearing of the platen roller, and swings between a lock position by the lock arm and a release position apart from the lock arm; and a lever movably provided to the swing arm, for releasing a locked state of the platen roller by the lock arm by an external force applied to a force point, wherein a direction in which the force point of the lever moves when the locked state by the lock arm is released is same as a swinging direction of the swing arm.