Dot-matrix printer

Abstract

A dot-matrix printer comprises a main frame, a first movable frame, and a second movable frame, wherein the main frame supports a printer head; the first movable frame supports a platen and a first paper feeding roller, and is pivotally connected to one end of the main frame via a first pivot shaft to permit itself to be opened or closed relative to the main frame; the second movable frame supports a second paper feeding roller, and is pivotally connected to the other end of the main frame via a second pivot shaft to permit itself to be opened or closed relative to the main frame; and wherein when the first movable frame and the second movable frame are closed relative to the main frame, the printer head is opposite to the platen to form a printing position; and the first paper feeding roller is tangent to the second paper feeding roller. The dot-matrix printer according to the present invention has two movable frames. The first paper feeding roller and the second paper feeding roller are provided in these two movable frames, respectively. The above movable frames can rotate about the main frame to be opened, avoiding the inconvenience of replacing the ink ribbon and cleaning the printer head in the prior art.

Dependencies are inferred from the claim text.