Patent ID: 9188935
Filing Date: 2015-11-17
Classification: G03G

Abstract:
1. An image forming apparatus, comprising: at least three image forming units, each of which comprises a photosensitive drum configured to be rotatable about a rotation axis, the photosensitive drums of the at least three image forming units being arranged to align along an aligning direction, which is orthogonal to the rotation axes of the photosensitive drums; a substrate arranged on one side of the at least three image forming units in an axial direction of the rotation axes of the photosensitive drums, the substrate being configured to supply electricity to the at least three image forming units; a frame made of resin and configured to support the at least three image forming units and the substrate; and a plurality of spring electrodes, each of which is provided to one of the at least three image forming units respectively, each of the plurality of spring electrodes being arranged in a position between the respective one of the at least three image forming units and the substrate in a compressed condition, wherein the plurality of spring electrodes comprises a first spring electrode, a second spring electrode arranged to adjoin the first spring electrode, and a third spring electrode arranged to adjoin the second spring electrode on a side opposite from the first spring electrode across the second spring electrode; wherein the first spring electrode, the second spring electrode, and the third spring electrode are configured to serve a common function and are arranged to align along the aligning direction; wherein the frame comprises a pair of supporting parts, each of which is arranged on one side and the other side of the plurality of spring electrodes along the aligning direction respectively, the pair of supporting parts being configured to support the substrate; wherein a distance between the second spring electrode and the third spring electrode is greater than a distance between the first spring electrode and the second spring electrode; wherein a center between the pair of supporting parts is located in a position between the second spring electrode and the third spring electrode; wherein the frame is configured to support ends of the at least three image forming units on the one side in the axial direction on a first face thereof; wherein the pair of supporting parts are formed on a second face of the frame, the second face being opposite from the first face, to support the substrate on one side of the frame; wherein the image forming apparatus further comprises: wherein the beam is arranged in a position between the second spring electrode and the third spring electrode along the aligning direction.