| 摘要 |
A roll paper transportation device for conveying roll paper (5), comprises a paper detection unit (8) for detecting the presence of roll paper (5). The paper detection unit (8) comprises a detection lever (17) that pivots when in contact with the roll paper (5), a cam (20) formed integrally with the detection lever (17) and having a curved surface (21) that is concentric to the rotary axis (18) of the detection lever (17), and a switch lever (23) that contacts the curved surface (21) of the cam (20). |
