12V printer motor needle printer, the basic structure and working principle of needle printer
The main work of a printer is to receive data, and then according to the requirements of the host control command to print information through the print head printed on the paper. Users can operate and use the printer through the printer's control panel. The overall structure of the printer is divided into mechanical and electrical parts. 1. Mechanical structure device: the printer mechanical device is mainly composed of four parts: print head, transmission system, frame and shell. Print head Print head is installed on the printer for printing, is one of the key parts of the printer. The printer is to rely on electronic circuit to drive the print head steel needle to flush the ribbon, using the ink on the ribbon adhesion on the paper and print out a point of information. The basic structure of the print head includes electromagnetic component, printing component, heat dissipation component, bracket and gasket, etc. The print needle body and the armature are welded into one - body. Due to the action of the reset spring, the armature is released, so that the print needle leaves the ribbon in a static state. When the printing head receives the pulse current generated by the printing drive signal sent by the printer's main circuit, the printing head coil is energized to generate a magnetic field to magnetize the iron core and attract the armature, so that the printing needle strikes the ribbon. The ribbon will print an ink spot on the paper under the action of the printing needle. When the pulse current disappears, the printing head coil loses the current, the iron core loses its magnetism, and the armature retract the printing needle under the action of the reset spring, and is in the standby state.
