JP2016109898A5

JP2016109898A5 -

Info

Publication number: JP2016109898A5
Application number: JP2014247851A
Authority: JP
Filing date: 2014-12-08
Publication date: 2018-01-25
Anticipated expiration: 2034-12-08

Description

本発明の目的は、帯電ローラと軸受部材の摺動性を向上させ、摺動による異音の発生を抑え、導通を安定させることができる帯電装置、およびこれを用いたプロセスカートリッジ、画像形成装置を提供することにある。 An object of the present invention improves the slidability of the strip conductive roller and the bearing member, suppressing the occurrence of abnormal noise due to sliding, the charging device capable of stabilizing the conduction, and a process cartridge using the same, the image forming To provide an apparatus.

本発明によれば、帯電ローラと軸受部材の摺動性を向上させ、摺動による異音の発生を抑え、導通を安定させることができる。 According to the present invention, to improve the slidability of the strip conductive roller and the bearing member, suppressing the occurrence of abnormal noise due to sliding, conduction can be stabilized.

Claims

A charging roller having a conductive shaft at the end;
As the support portion for supporting the shaft portion, a plurality of arc-shaped convex portions are formed in an angle range smaller than 180 degrees in the circumferential direction in a cross section intersecting the axial direction, and the support portion is the shaft portion in the axial direction. A bearing member formed inside the end face of
A charging device comprising:

2. The charging device according to claim 1, further comprising a pressing member that pressurizes the bearing member from a direction in which the arcuate convex portion is formed, and causes the charging roller to contact a member to be charged.

The charging device according to claim 2, wherein the pressure member is a compression spring.

It said support charging device according to any one of claims 1 to 3, characterized in that it is formed extending in a straight line parallel to the shaft portion.

The support portion is formed in parallel with the shaft portion, and an end portion of the support portion is provided between an end surface of the shaft portion and a center line in the axial direction of the pressure member. 2. The charging device according to 2 or 3 .

The bearing member is opposed through the end face and the gap of the shaft portion, to any one of claims 1 to 5, characterized in that it has a regulating surface which regulates the axial displacement of the shaft portion The charging device described.

The charging device according to claim 6 , wherein a hole that overlaps the contact portion of the support portion and the shaft portion when viewed from the axial direction is provided in the regulation surface.

It said bearing member charging device according to any one of claims 1 to 7, characterized in that it is electrically conductive.

A process cartridge that can be inserted into the main body of an image forming apparatus,
An image carrier as a member to be charged, which carries a developer image and is in contact with the charging roller;
A charging device according to any one of claims 1 to 8 ,
A process cartridge comprising: cleaning means for cleaning the developer of the image carrier; and at least one of developing means for supplying developer to the image carrier.

In the image carrier, one end side in the rotation axis direction is a driving side, and the other end side is a non-driving side,
The process cartridge according to claim 9 , wherein the bearing member is provided on the non-driving side.

An image carrier as a member to be charged, which carries a developer image and is in contact with the charging roller;
A charging device according to any one of claims 1 to 8 ,
At least one of cleaning means for cleaning the developer on the image carrier, and developing means for supplying developer to the image carrier;
In the process cartridge or in the main body of the image forming apparatus not using the process cartridge,
An image forming apparatus further comprising an exposure device for forming an electrostatic latent image on the image carrier.