Patent ID: 7780367

Claim:
A thermal printer comprising: a base frame on which a thermal roll sheet is mounted; a cover frame attached to said base frame so as to be opened and closed; a platen mounted on said cover frame for feeding the thermal roll sheet; a head bracket attached to said base frame in a movable state; a thermal head mounted on said head bracket for printing on the thermal roll sheet between said platen and said thermal head, said thermal head being biased together with said head bracket so as to press said platen in a radial direction of said platen when said cover frame is closed; and a cover operation member movably attached to said base frame to selectively latch and unlatch said cover frame, said cover operation member being mechanically coupled with said head bracket so that said thermal head is separated from said platen; wherein said cover operation member comprises: a lever rotatable in clockwise and counterclockwise directions around a rotational axis on said base frame; a hook portion extended from said lever to selectively latch and unlatch said platen; and a drive portion extended from said lever to drive said head bracket so that said thermal head is separated from said platen.