JP2008250355A5 - - Google Patents

Claims (11)

An image carrier that carries a toner image and a counter member that faces the image carrier, and a transfer nip is formed between the image carrier and the counter member by pressing the counter member and the image carrier. In the transfer device for transferring the toner image on the image carrier to the transfer material by passing the transfer material through the transfer nip,
A movable portion configured to be movable with respect to the apparatus main body, including the opposing member and a second electric contact that contacts the first electric contact on the apparatus main body side;
The transfer device according to claim 1, wherein the first electrical contact and the second electrical contact are brought into contact with each other by an elastic force, and a direction of an urging force acting between the two electrical contacts is a direction substantially orthogonal to the pressure contact direction. The transfer device according to claim 1.
The transfer device according to claim 1, wherein the facing member is a rotating body, and the direction of the urging force acting between the two electrical contacts is a rotation axis direction of the facing member. The transfer apparatus according to claim 1 or 2,
The transfer apparatus, wherein the first electrical contact is grounded. The transfer apparatus according to claim 1 or 2,
The transfer apparatus, wherein the first electrical contact is electrically connected to a power source. The transfer device according to any one of claims 1 to 4,
The transfer device, wherein the movable portion is provided on a cover member that can be opened and closed with respect to the apparatus main body. The transfer device according to claim 5, wherein
When the cover member is opened, the image carrier and the opposing member are separated to open the transfer nip. The transfer device according to any one of claims 1 to 6,
The transfer device includes a conductive member provided so as to be positioned in a transfer material conveyance path downstream of the transfer nip and electrically connected to the second electrical contact. . The transfer device according to claim 7, wherein
The transfer apparatus according to claim 1, wherein the conductive member is a charge eliminating member that reduces a charge of the transfer material that has passed through the transfer nip. The transfer apparatus according to any one of claims 1 to 8,
The image carrier is an intermediate transfer belt supported by a plurality of rollers, and the opposing member is a secondary transfer member,
A transfer apparatus comprising bias applying means for applying a transfer bias to the intermediate transfer belt via a rotation shaft of a roller provided at a position facing the secondary transfer member among the plurality of rollers. The transfer apparatus according to any one of claims 1 to 8,
The image carrier is an intermediate transfer belt, and the opposing member is a secondary transfer roller;
  The movable portion is electrically connected to a third electrical contact on the apparatus main body side, and has a fourth electrical contact for applying a bias to the secondary transfer roller,
The transfer device, wherein the third electrical contact and the fourth electrical contact abut on each other by an elastic force, and a direction of an urging force acting between the both electrical contacts is a direction substantially orthogonal to the pressure contact direction. An image forming apparatus comprising the transfer device according to claim 1.