Patent ID: 8905535
Filing Date: 2014-12-09
Classification: B41J

Abstract:
1. A dot-matrix printer, comprising a main frame, a first movable frame, and a second movable frame, wherein the main frame supports a printer head; the first movable frame is used for supporting a platen and a first paper feeding roller, and is supported by the main frame and pivotally connected to one end of the main frame via a first pivot shaft so as to permit itself to be opened or closed relative to the main frame, the second movable frame is used for supporting a second paper feeding roller, and is supported by the main frame and pivotally connected to the other end of the main frame via a second pivot shaft so as 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, the first paper feeding roller is tangent to the second paper feeding roller; and a paper feeding mechanism is formed by the tangential cooperation of the first paper feeding roller and the second paper feeding roller and is provided downstream of the printing position.