Patent ID: 8550733

Claim:
A printing apparatus comprising: a frame comprising a frame compartment; a thermal head mounted on the frame and provided to print; a platen roller mounted on the frame and provided to press a sheet against the thermal head; a first motor to drive the platen roller; a first reduction gear drive mechanism provided to reduce and transmit a rotation of the first motor to the platen roller; and a first cap to substantially seat an integrated unit including the first motor and the first reduction gear drive mechanism, wherein an output axle of the first reduction gear drive mechanism is exposed and protrudes through the first cap, wherein the first motor and the first reduction gear mechanism are sealed together within the frame compartment, wherein the entire first reduction gear mechanism is arranged closer to an outer width side of the printing apparatus than the first motor in a horizontal direction, wherein the frame further includes a main frame including the frame compartment and a subframe, the platen roller to feed the sheet and the first motor are mounted on the main frame, the thermal head is in mounted on the subframe, and, when the subframe is joined to the main frame, the thermal head is in contact with the platen roller, wherein the main frame further includes a first side plate defining a side of the frame compartment, wherein the integrated unit including the first motor with the first reduction gear drive mechanism sealed by the first cap is fixed to an inner surface of the first side plate of the main frame, and wherein the output axle protrudes outward beyond the first side plate of the main frame.