Charge device, image formation assembly using the same, and image formation apparatus

An image formation apparatus comprising:

• a charge device;
• and
• a charged body including a photoreceptor, wherein
• the charge device is provided to face the charged body,
• the charge device includes
• an endless charging belt configured to come into contact with a moving charged body and to circulate in a same direction as a moving direction of the charged body,
• an electrode member that is disposed to be in contact with a part of an inner peripheral surface of the charging belt, the electrode member that is disposed to face the charged body across the charging belt being sandwiched between the electrode member and the charged body, and
• a bias applying unit that applies a charge bias to the electrode member, the charging belt includes
• a downstream-side portion that is adjacent to and downstream of a facing position where the charged body faces the electrode member, in the moving direction of the charged body,
• a contact portion that is in contact with the charged member without the contact portion being in contact with the electrode member, the contact portion that is adjacent to the facing position on an upstream side of the facing position in the moving direction of the charged body, and
• an upstream-side portion that is adjacent to the contact portion of the charging belt on an upstream side of the contact portion in the moving direction of the charged body, the upstream-side portion that is in contact with none of the electrode member and the charged body, and,
• a discharge region in which discharge can occur is formed between the downstream-side portion of the charging belt and the charged body, and
• a discharge suppression region in which discharge is suppressed is formed between the upstream-side portion of the charging belt and the charged body.