| 摘要 |
A printer has a platen which vertically moves with respect to a printing head to press a medium against a guide member from below. In this printer, the platen is attached to a support member through a spring member to be urged upward by the spring member, and the arrangement is such that when the thickness of the medium is more than a predetermined value, the platen is further urged upward by a spring force reinforcing mechanism, whereby the force with which the platen presses the medium can be suitably controlled according to the thickness of the medium, so that printing can be performed in a stabilized manner.
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