Media feed mechanism with adjustable roller arms

Abstract

The invention provides a printing medium feed mechanism with adjustable roller support arms. The printing medium feed mechanism comprises driving rotating shafts and pressing units; each pressing unitcomprises pressing rotating shafts, elastic assemblies, fixing frames and at least a pair of support arms; each fixing frame comprises a first side wall and a second side wall; each first support armcomprises a first rotating shaft which is connected to the corresponding first side wall in a pivoted mode; one ends of the first support arms are connected to the elastic assemblies; the other endsof the first support arms are connected to the pressing rotating shafts in a pivoted mode; each second support arm comprises an eccentric wheel shaft, an eccentric wheel through hole and a limiting shaft; the peripheries of the eccentric wheel shafts abut against the peripheries of the limiting shafts; one ends of the second support arms are connected to the elastic assemblies; the other ends of the second support arms are connected to the pressing rotating shafts in a pivoted mode; and when the peripheries of the eccentric wheel shafts rotateto push against the peripheries of the limiting shafts, and the second support arms move along limiting grooves and are subjected to the action of the elastic assemblies by taking the limiting shafts as the axes so as push and press the pressing rotating shafts to the driving rotating shafts.

Description

technical field [0001] The invention relates to a printing medium feeding mechanism of a printer, in particular to a printing medium feeding mechanism with an adjustable roller support arm. Background technique [0002] With the advancement and development of science and technology, the application of printers is becoming more and more extensive. Traditionally, such printers primarily feed paper by rotating a pair of paper feeding rollers. The fed paper is sandwiched between a pair of pinch rollers and driving rollers located above and below the paper feeding direction of the print head, and driven by a predetermined nip pressure and The rollers make contact, and when the drive rollers turn, the paper is fed to the printheads. In order to ensure stable paper feeding and avoid skewing, the pressing roller and driving roller must be kept parallel and maintain a smooth pressing force across the board. However, the pressing rollers and driving rollers in the feeding mechanism...

AI Technical Summary

Problems solved by technology

[0004] The main object of the present invention is to provide a printing medium feeding mechanism with adjustable roller arm, which is suitable for a printer, such as but not limited to a wide format printer, which can precisely and accurately realize the parallelism between the pressing roller and the driving roller High degree, low cost, easy maintenance, simple manufacture, high reliability, effectively improve the problem of poor parallelism after the assembly of the pressing roller and the driving roller, ensure complete line contact between the pressing roller and the driving roller, and achieve stable feeding of printing media the goal of

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