Printing device
A roll paper printer has a roll paper holder that holds a paper roll of recording paper wound into a roll; a platen roller that conveys recording paper delivered from the paper roll; a printhead that prints on the recording paper conveyed by the platen roller; a delivery roller around which the recording paper travels between the paper roll and platen roller; and a paper detection lever that detects the recording paper; the paper detection lever being disposed on the inside circumference side of a first curved path through which the recording paper is conveyed in contact with the delivery roller.
1. A printing device comprising:
a roll paper holder in which a paper roll is stored;
a conveyance roller configured to convey recording paper delivered from the paper roll;
a printhead configured to print on the recording paper conveyed by the conveyance roller;
a driven roller disposed between the paper roll and the conveyance roller; and
a paper detection member configured to detect the recording paper, and disposed on the inside circumference side of a first curved path through which the recording paper is conveyed in contact with the driven roller.
2. The printing device described in claim 1 , further comprising:
a paper guide disposed between the driven roller and the conveyance roller; and
a second curved path through which the recording paper is conveyed in contact with the paper guide and which curves in a direction opposite to the first curved path.
3. The printing device described in claim 1 , wherein:
the roll paper holder has a recess on which the paper roll rests and rotatable, and
a paper roll support part configured to support the paper roll at an edge of the recess in the direction of rotation; and
the driven roller is disposed on an opposite side of the recess as the roll paper support part.
4. The printing device described in claim 3 , wherein:
the printing device is configured to be used in a first installation position where the recess opens to the top, and a second installation position where the recess opens to a side and the driven roller is above the recess; and
a rotating body configured to support the paper roll is disposed at a position opposing a bottom of the recess and within a range of paper roll rotation in the second installation position.
5. The printing device described in claim 4 , further comprising:
a roll paper loading opening for loading and removing a paper roll in the roll paper holder; and
an access cover unit configured to open and close the roll paper loading opening; wherein the conveyance roller and rotating body are mounted on the access cover unit.
6. The printing device described in claim 1 , wherein the recording paper wraps around an outside of the driven roller so that a paper path on a downstream side of the driven roller is not affected by a change in the diameter of the paper roll.
7. The printing device described in claim 4 , further comprising:
a rib that supports the paper roll from below in the second installation position when a diameter of the paper roll becomes small.
8. The printing device described in claim 4 , further comprising:
a roller that supports the paper roll in the second installation position.