| 摘要 |
A printing device which employs a platen frame mounted on a resin or plastic base frame with a pivoting joint and a rocker spring which biases the frames together which creates a floating platen frame. A main guide shaft is mounted on the base frame and supports a print head. A clearance member fixed to the platen frame extends toward the main guide shaft and is pressed against a clearance adjustment member attached to at least one end of the main guide shaft. The clearance adjustment member allows adjustment of the platen gap while the clearance member and bias spring automatically adjust the paten gap under various printing conditions. Using this gap fixing device, the platen gap can be maintained constant even if the frame expands due to heat, thus facilitating the use of resin frames. At the same time, by using a floating platen frame and positioning a feed motor and other components on the platen frame, noise and vibrations are decreased.
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