SERIAL PRINTER

PURPOSE:To provide a stabilized clear print by employing a printer mechanism in which a moving guide follows the movement of a print head if they are properly connected, whereas it leaves the head if an excessive force acts to break the connection. CONSTITUTION:To print a recording medium 8 at rest in a predetermined position, a print head 6 moves toward the right from its home position, together with a carriage 5. A moving guide 11 follows the movement of the carriage 5 because a permanent magnet 21b and a magnetic member 22b are magnetically connected. The recording medium 8 is pressed by the lower side of the moving guide 11 and the print head 6, and it will not become loose, so that a clear print is obtained. The gap between the sides 11a and 11b of the moving guide 11 is shorter than the travel of the print head 6. Therefore, when the moving guide 11 moves following the print head 6, its side 11a abuts against a stopper 18, so that the moving guide 11 will not move further to the right or left.