Image forming apparatus and process cartridge

摘要

An image forming apparatus includes an electrophotographic photoreceptor that includes a conductive substrate and an organic layer which includes a photoreceptive layer; a charging member that charges the surface of the electrophotographic photoreceptor; an electrostatic latent image forming unit; a developing unit; a transfer unit; and a cleaning member that performs cleaning on the surface of the electrophotographic photoreceptor, wherein a contact area of the electrophotographic photoreceptor with the cleaning member in an axis direction of the electrophotographic photoreceptor is wider than a contact area thereof with the charging member, and d, d′, d″ and d″max, which each are values with respect to the total film thickness of the organic layer at the respective portions as defined in the present specification, satisfy expressions 0.97≦d′/d≦1.03, 0.97≦d″/d≦1.1 and 1.03≦d″max/d≦1.1 at each of both of the end portions in the axis direction of the electrophotographic photoreceptor.

主权项

1. An image forming apparatus comprising:
an electrophotographic photoreceptor that includes a conductive substrate and an organic layer which is provided on the conductive substrate and includes at least a photoreceptive layer; a charging member that contacts with a surface of the electrophotographic photoreceptor and charges the surface of the electrophotographic photoreceptor; an electrostatic latent image forming unit that forms an electrostatic latent image on the surface of the electrophotographic photoreceptor; a developing unit that develops the electrostatic latent image which is formed on the surface of the electrophotographic photoreceptor by using a developer containing a toner, to form a toner image; a transfer unit that transfers the toner image to a surface of a recording medium; and a cleaning member that contacts with the surface of the electrophotographic photoreceptor so as to perform cleaning on the surface of the electrophotographic photoreceptor, wherein a contact area of the electrophotographic photoreceptor and the cleaning member in an axis direction of the electrophotographic photoreceptor is wider than a contact area of the electrophotographic photoreceptor and the charging member, maximum total film thickness portions at each of both end portions in the axis direction of the electrophotographic photoreceptor, at which a total film thickness of the organic layer becomes the greatest are included at a non-contact area with the cleaning member, and when an average of the total film thickness of the organic layer in a contact area with the charging member is set as d, the total film thickness of the organic layer in a non-contact area with the charging member and in an area A from an end portion of the contact area with the charging member to an end portion of the contact area with the cleaning member in the axis direction of the electrophotographic photoreceptor is set as d′, the total film thickness of the organic layer in the non-contact area with the cleaning member and in an area B from the end portion of the contact area with the cleaning member in the axis direction of the electrophotographic photoreceptor to the maximum total film thickness portion is set as d″, and the total film thickness of the maximum total film thickness portion of the organic layer is set as d″max, all the following relational expressions (1) to (3) are satisfied at each of both of the end portions in the axis direction of the electrophotographic photoreceptor;
0.97≦d′/d≦1.03  (1)0.97≦d″/d≦1.1  (2)1.03≦d″max/d≦1.1  (3).