Patent ID: 8368732
Filing Date: 2013-02-05
Classification: B41J

Abstract:
1. A thermal printer comprising: a body comprising a platen roller unit including a platen roller; and a cover element being movable relative to the body between an open position and a closed position, comprising a thermal printhead unit, a claw protruding backward, a stepped pin extending downward, including a step portion at a bottom end, and a stepped pin adjuster element moving the stepped pin in an axial direction to change a position of the step portion, the thermal printhead unit including an exothermic element array, a supported portion in a portion in front of the exothermic element array to be hooked on the claw, and a notch portion at about a center of a width direction of a portion behind the exothermic element array to be hooked on the step portion of the stepped pin, wherein: the platen roller unit and the thermal printhead unit are placed in the body and the cover element, respectively so that the exothermic element array contacts with the platen roller while the cover element is in the closed position and the exothermic element array and the platen roller are separated from each other while the cover element is not in the closed position; the platen roller unit and the thermal printhead unit include respective positioning elements which engage with each other to restrict a relative movement of the exothermic element array and the platen roller while the cover element is in the closed position; and the platen roller unit is configured to be detachable from the body in a direction coinciding with a moving direction of the cover element from the closed position.