Charging device, image forming unit and image forming device

An image forming unit, comprising:

• a charging member, disposed opposite to a surface of an image supporter and pressed against the image supporter, wherein a charging voltage is applied to the charging member to discharge between the charging member and the surface of the image supporter, so as to charge the image supporter, and
• wherein the charging member further comprises spacers in contact with a portion other than an image forming region of the image supporter, and a portion of the charging member opposite to the image forming region of the image supporter separates from the surface of the image supporter by a tiny gap, and
• wherein in a moving direction of the surface of the supporter, a contact width of a contact portion where the spacer is pressed to contact with the image supporter is set below 0.5 mm;
• and
• an image supporter, wherein the image supporter and the charging member are integrally installed, and capable of detaching from or attaching to a mainbody of an image forming device.

An image forming device, comprising:

• a charging device, equipped with a charging member, disposed opposite to a surface of an image supporter and pressed against the image supporter, wherein a charging voltage is applied to the charging member to discharge between the charging member and the surface of the image supporter, so as to charge the image supporter, and
• wherein the charging member further comprises spacers in contact with a portion other than an image forming region of the image supporter, and a portion of the charging member opposite to the image forming region of the image supporter separates from the surface of the image supporter by a tiny gap, and
• wherein in a moving direction of the surface of the supporter, a contact width of a contact portion where the spacer is pressed to contact with the image supporter is set below 0.5 mm;
• and an image supporter.