Roll paper supply mechanism and roll paper printer

Abstract

A roll paper supply mechanism reliably prevents roll paper from rising from a desired position. The roll paper supply mechanismof a roll paper printerhas an urging memberthat urges the round end surface of the roll paperto the roll paper guidedefining one side of the roll paper storage unit. The urging surfaceof the urging memberis inclined to the inside in the pulling direction A of the recording paperthat is pulled from the roll paper. When seen from the side of the width of the roll paper storage unit, the urging surfaceis disposed between a vertical line V through the center of gravity G of the roll paper and the recording paper pulling position D, and urges an outside edge partof the roll paperat a position above the recording paper pulling position D. Because the urging surfaceprevents the roll paperfrom rising in the direction in which the recording paperis pulled from the roll paper, and produces a moment centered on the urging position that prevents the roll paperfrom rising, the roll papercan be reliably prevented from rising and from bouncing up and down.