Conductive rubber roller and imaging device

Abstract

The invention provides a conductive rubber roller. The conductive rubber roller comprises a metal shaft core, an elastic layer packed outside the metal shaft core and a surface layer formed outside the elastic layer, wherein the elastic layer consists of rubber A and at least one of conductive fillers filled in the rubber A; the threshold value range of the conductive fillers in the rubber is as follows: a conductive filler valve is greater than or equal to Zb and is less than or equal to Yb; and b/Yb+c/Yc+...q/Yx is greater than or equal to 1 if the filling fractions of the conductive fillers B, C,...X in the rubber A are respectively set to be b, c,...q. According to the conductive rubber roller provided by the invention, the filling number of the conductive fillers of the elastic layer is limited, and an integral resistance value of the rubber roller is adjusted according to the resistance difference between an inner layer structure and an outer structure layer, so that the conductive rubber roller is less in dependency to voltage, and is less fluctuated by the environment change, the resistance is even in distribution, and the increase of the rigidity of the rubber roller since a mass of the conductive fillers are filled into the elastic layer can be avoided; and therefore, not only can the cost of the material be reduced, but also the whole flexibility of the rubber roller can be guaranteed. The invention further discloses an imaging device which comprises the conductive rubber roller.

Description

【Technical field】 [0001] The invention relates to the field of imaging equipment, and is suitable for conductive rubber rollers of imaging equipment such as electrophotographic copiers, printers and electrostatic recording equipment, and in particular relates to a conductive rubber roller with toner transmission function, including developing rollers in electronic imaging equipment, Cleaning rollers, charging rollers and transfer rollers. 【Background technique】 [0002] In recent years, with the continuous development of technology in the imaging field, the miniaturization of imaging devices, a significant increase in printing speed, and the formation of high-quality images have been widely popularized at present. After a large number of research experiments, people found that reducing the toner from the traditional 10 μm to 5 μm, and the more uniform the particle size of the toner and the greater the sphericity, the more the above performance can be met. [0003] In the pa...

AI Technical Summary

Problems solved by technology

However, in order to achieve higher electrical conductivity, the thickness of the surface rubber must be very small. In this way, it is difficult to achieve it when only relying on rubber roller molding and post-grinding processing, which will greatly increase the defect rate of the product, and eventually cause the product cost to rise.

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