Print gap control for printing device.

摘要

A printing device uses a base frame (1) having a low rigidity and made from a resin material having a large thermal expansion coefficient or a thin sheet metal. In order to keep the platen gap, i.e. the gap between the print head (3) guided on a main guide shaft (2) and the platen (51) constant irrespective of temperature influences or external forces on the base frame, gap control means are provided. In a specific embodiment a clearance member (54) fixed to a platen frame (5) supporting the platen (51) is pressed against a clearance adjustment member (30) attached to the main guide shaft (2) by a spring 55. <IMAGE>