A printing method and device for automatically adjusting the printing gap

Abstract

The invention relates to an automatic printing interval adjusting lettering method and device. When a printing medium enters a printing area, if the thickness of the printing medium is smaller than or equal to an interval between a paper pressing block and a printing drum, at the moment, a printing head is located at the lowest position, deformation of a torsional spring on a carriage unit split body B is minimum, and generated torsion is used for adjusting counter-acting force generated when the printing head works; if the thickness of the printing medium is larger than the interval between the paper pressing block and the printing drum, the paper pressing block makes contact with the printing medium, the printing medium pushes a carriage unit split body C to move upwards along the carriage unit split body B, the carriage unit split body C drives the carriage unit split body B to rotate around a carriage unit guide shaft, at the moment, the deformation of the torsional spring on the carriage unit split body B begins to be increased, and the generated torsion enables the paper pressing block to press the printing medium. The device is novel in design and simple in structure, the printing head does not incline, the service life of the printing head is long, the printing medium thickness application range is large, and the device has high practical value and a wide application prospect.

Description

technical field [0001] The invention relates to the technical field of printing equipment, in particular to a printing method and device for automatically adjusting the printing gap. Background technique [0002] In some special industries, it is often necessary to print some special paper, such as passbooks and certificates, which are characterized by relatively thick. At the same time, the thickness of the paper will change during the printing process. The change. Traditional printers rely on an eccentric structure and manually adjust to change the gap between the print head and the printing medium, so as to adapt to the printing of different thickness media. [0003] In the existing scheme, the gap between the print head and the printing platform can be changed by rotating the character carriage around the guide shaft, so as to adapt to printing media of different thicknesses. With the increase of the thickness of the printing media, the inclination angle of the print he...

AI Technical Summary

Problems solved by technology

[0003] In the existing scheme, the gap between the print head and the printing platform can be changed by rotating the character carriage around the guide shaft, so as to adapt to printing media of different thicknesses. With the increase of the thickness of the printing media, the inclination angle of the print head increases, and the The increased deflection angle of the printing platform will affect the printing medium and also have a certain impact on the life of the print head

Therefore, the medium with adaptive thickness cannot be made very large

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