Patent ID: 7889218

Claim:
A head mechanism of a thermal printer, comprising: a platen roller rotatably supported by a housing; a thermal head arranged at a front end of a head bearing member, the front end of the head bearing member being adapted to be rotatable about a rear end supported by the housing, and is arranged to face the platen roller; and a gap adjusting means adjusting the dimension of a gap between the thermal head and the platen roller, wherein the gap adjusting means is adapted such that the thermal head is able to be brought close to or separated from an arrangement position of the platen roller, and wherein the thermal head and the platen roller are arranged to form a gap with a dimension smaller than the thickness of the sheet provided for recording during non-recording, and during recording, a sheet provided for recording is sandwiched between the platen roller and the thermal head, and an electric current is selectively applied to heat-generating elements arranged in the thermal head, thereby obtaining desired recording.