A print head structure and its printer

Abstract

The invention provides a printing head structure and a printer with the printing head structure. The printing head structure comprises a printing head bracket, a thermal transfer ribbon guide frame and a mounting frame; a printing head and a guide structure are arranged on the printing head bracket; the thermal transfer ribbon guide frame and the printing head bracket are independently arranged on a printer shell, and the thermal transfer ribbon guide frame is positioned on the rear side of the printing head bracket. The rear end of the thermal transfer ribbon guide frame is mounted on the printer shell through a fastening piece, and the front end of the thermal transfer ribbon guide frame is suspended. The mounting frame is detachably mounted on the printer shell; the printing head bracket is arranged on the mounting frame; a spring which is pressed on the printing head bracket is arranged on the mounting frame. According to the printing head structure and the printer with the printing head structure, the thermal transfer ribbon guide frame and the printing head bracket can be mounted and float independently; the structure and assembling are simplified; the production efficiency is improved; the printing head structure can be adapted to the printing of labels with a plurality of thicknesses; the universality of the printer is improved. A thermal transfer ribbon can enter more smoothly through the thermal transfer ribbon guide frame, so that the thermal transfer ribbon is prevented from being wrinkled and cut; the thermal transfer ribbon has elasticity, so that a label is closer to a sensor, and the detection accuracy of the label is improved.

Description

technical field [0001] The invention belongs to the technical field of printers, and in particular relates to a print head structure and a printer thereof. Background technique [0002] Label printer is a device that prints barcode, two-dimensional code, graphics, text and other image information on labels by means of thermal and thermal transfer printing. It is widely used in POS terminal systems, banking systems, medical instruments and other fields. [0003] Existing label printers have a guide structure for ribbons and labels. In the prior art, the print head bracket and the ribbon guide frame at the rear are all integrated structures, and there are the following problems: 1. The label moves in a fixed gap space, but because the label body is a soft body, it cannot move smoothly in the space , so it will float up and down relatively in this space during the printing movement, so that the distance between it and the sensor is inconsistent and cannot be detected normally,...

AI Technical Summary

Problems solved by technology

In the prior art, the print head bracket and the ribbon guide frame at the rear are all integrated structures, and there are the following problems: 1. The label moves in a fixed gap space, but because the label body is a soft body, it cannot move smoothly in the space , so it will float up and down relatively in this space during the printing movement, so that the distance between it and the sensor is inconsistent and cannot be detected normally, resulting in inaccurate printing detection, inaccurate printing position, and inaccurate cutting position; 2. For Different thickness of the label, no matter what the thickness of the label is, the gap value is constant, which is not conducive to the detection of labels; 3. There are two forms of integrated guide: guide with the metal sheet on the print head; The print head is installed with metal guide rods forward

Both the metal sheet guide and the metal rod guide only have the guiding function and have no paper pressing function, so the detection accuracy cannot be improved; at the same time, the use of metal rods increases the complexity of assembly and manufacturing, which is not conducive to production

[0004] The existing print head can float up and down, but the front and rear positions cannot be moved, and the adaptability is poor: the print head is the most critical part of the printer, and its installation position is very important, so it can return to the correct installation position in the open and closed state. The printing effect is directly related to

Due to assembly errors, if only floating up and down is used, the print head cannot quickly return to the locked position, or enter the locked position is not smooth, the way to improve its effect is to improve the assembly and manufacturing accuracy of the rotation center, usually with a special Fixtures are used for installation, the installation structure is complicated, and the operation is inconvenient

In traditional printers, in order to meet the printing requirements of labels with different thicknesses, the pressure value of the print head is adjusted by replacing copper sleeves of different sizes and diameters. It is not easy to replace, and the copper sleeves of different diameters are not easy to carry and easy to lose.

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