Charging device, imaging unit, and image forming device
A charging device and image technology, which is applied to corona discharge devices, electrical recording processes using charge patterns, electrical components, etc., can solve the problems of complex wiring paths and the application of charging bias to parts that cannot be charged, and achieve stable charging bias. pressure effect
Active Publication Date: 2015-11-18
RICOH KK
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Problems solved by technology
[0004] However, in this method, if foreign matter is fixed on one end of the electrode member or the electrode member, etc., poor contact between the electrode member and the rotating shaft member occurs, and the charging bias cannot be stably applied to the charging member.
In addition, in order to suppress the above-mentioned destabilization of the charging bias, if the other end of the rotating shaft member of the charging member is also in contact with the electrode member, it is necessary to extend from the charging bias power supply to both ends of the rotating shaft member. The wires go around, making the wiring path complicated
Method used
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[0058] Next, an embodiment of an electrophotographic printer (hereinafter, abbreviated as "printer") will be described as an image forming apparatus to which the present invention is applied. , Quantity, relative arrangement, etc. have made various limitations, but these are only examples, and the present invention is not limited thereto.
[0059] First, the basic configuration of the printer according to this embodiment will be described. figure 1 It is a schematic configuration diagram showing the printer according to this embodiment. In this figure, the printer is provided with four image forming units 1Y, 1M, and 1C for forming toner images of yellow, magenta, cyan, and black (hereinafter, abbreviated as "Y, M, C, and K"). , 1K. The image forming units 1Y, 1M, 1C, and 1K use Y, M, C, and K toners of different colors as image forming materials, but have the same configuration except that, and are replaced at the end of their lifetime. Taking the image forming unit 1K for...
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PROBLEM TO BE SOLVED: To more stably apply a charging bias to a charging member without making a wiring path for bias application more complicated. SOLUTION: A rotatable charging roller 101K comprising a metal core 102K and a conductive rubber layer 103K laminated over the metal core is used as a charging member which uniformly charges a photoreceptor 2K. A first support member 111k supporting one end part in the rotation axis direction of the metal core 102K and a second support member supporting the other end part are respectively constituted of a conductive material. A charging bias applied to one end part in the rotation axis direction of a metal core 106K of a recovery roller 105K is conducted to the other end part in the rotation axis direction of the metal core 102K of the charging roller 101K via the metal core 106K and the second support member.
Description
technical field [0001] The present invention relates to a charging device including a charging member that uniformly charges the surface of the latent image carrier while in contact with the latent image carrier, and a cleaning member that cleans the surface of the latent image carrier while in contact with the charging member. The surface of the charging part. The present invention also relates to an imaging unit and an image forming apparatus using the charging device described above. Background technique [0002] Conventionally, as such a charging device, a device described in Patent Document 1 is known. The charging device includes a charging brush roller as a charging member and a recovery roller as a cleaning member. Moreover, the charging brush roller includes a rotatable metal rotary shaft member, and a brush roller portion made of a plurality of fibers erected on the peripheral surface thereof. While the brush roller portion of the charging brush roller is brough...
Claims
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IPC IPC(8): G03G15/02G03G15/08G03G15/00
Inventor 藤田雅也清水义之辻真人
Owner RICOH KK