Paper feeding mechanism and printer

Abstract

The invention provides a paper feeding mechanism, and relates to the technical field of printers. The paper feeding mechanism comprises a bearing frame, a transmission assembly, a suction piece and a first pressing piece, wherein the bearing frame is in transmission connection with the transmission assembly, the transmission assembly is connected with a rack, the suction piece used for sucking a film is connected with the bearing frame, and the first pressing piece used for pressing the film is connected with the bearing frame. The paper feeding mechanism is combined into an organic whole through the bearing frame, the transmission assembly, the suction piece and the first pressing piece, an automatic paper feeding function is provided for printing of a medical film, the bearing frame reciprocates in the rack through the transmission assembly, stable driving force can be provided for the film needing to be printed, then the film is sucked through the suction piece located on the bearing frame, and the film is prevented from falling off from the suction piece; and the first pressing piece arranged on the bearing frame can enable the film to be driven by a bearing column to accurately enter the input end of the paper feeding mechanism, and the first pressing piece plays a role in limiting the film.

Description

technical field [0001] The invention relates to the technical field of printers, in particular to a paper loading mechanism and a printer. Background technique [0002] The principle of the medical thermal film printer is that the print head heats the printing unit (electronic heating element) installed on the print head, contacts with the medical film, and under the condition of applying a certain pressure, the heat-sensitive coating film on the medical film is triggered to chemically According to the different photosensitive and developing conditions of heating time, temperature and pressure, different gray scales can be displayed, and the desired image can be printed. [0003] Different from general-purpose printers, thermal film printers use white PET or BOPET film bases, coated with heat-sensitive light films, and when heated and applied with a certain pressure, chemical reactions occur in the film, and according to the heating temperature, time and pressure The film w...

AI Technical Summary

Problems solved by technology

[0005] Due to the inherent defects of the heat-sensitive coating film of medical film, such as strong water absorption, high hygroscopic expansion coefficient, high elastic modulus, and low mechanical strength, it is easy to curl, and it is easy to produce watermarks and reticulation under high temperature and high humidity. , adhesion between two films

[0006] If the sticky film is so serious that it has an irreversible impact on the film coating, the natural film cannot be used

But for other situations, it mainly affects the thermal film printer when it is feeding paper, there are stacked sheets, and the film cannot be sucked, etc., which will affect the normal printing of the film, and even cause usability damage to the equipment.

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