PRINTER AND METHOD FOR CONTROLLING PRINTER

摘要

A printer includes a platen roller, a print head for performing printing on a recording paper, a first detection switch and a second detection switch for detecting a position of the platen roller, and a potential detector that detects electrical potential. Both of the first and second detection switch are switched off when the platen roller is mounted, and switched on when the platen roller is not mounted. One terminal of the first detection switch and one terminal of the second detection switch are connected to each other in parallel and grounded via a ground side resistor. A power supply is to be connected to another terminal of the first detection switch and another terminal of the second detection switch. The potential detector detects a potential between the one terminals of the first and second detection switches and the ground side resistor.

主权项

1. A printer, comprising:
a platen roller; a print head for performing printing on a recording paper; a first detection switch and a second detection switch for detecting a position of the platen roller; and a potential detector that detects electrical potential; wherein both of the first and second detection switch are switched off when the platen roller is mounted, and switched on when the platen roller is not mounted, wherein one terminal of the first detection switch and one terminal of the second detection switch are connected to each other in parallel and grounded via a ground side resistor, wherein a power supply is to be connected to another terminal of the first detection switch and another terminal of the second detection switch, and wherein the potential detector is configured to detect a potential between the one terminals of the first and second detection switches and the ground side resistor.