Patent ID: 8290402

Claim:
An image forming device comprising: a photosensitive member having a photosensitive surface that moves in a moving direction and that is configured to form a latent electrostatic image thereon; and a charger that opposes the photosensitive surface and that is configured to charge the photosensitive surface, the charger including: a wire electrode that is configured to be applied with a voltage for charging the photosensitive surface; a grid electrode that is disposed at a location between the wire electrode and the photosensitive surface; and a shield electrode that is arranged to partly surround the wire electrode, the shield electrode having a plurality of sections, the shield electrode having an opening at a side the same as the grid electrode with respect to the wire electrode, the shield electrode including a first end and a second end each facing the photosensitive surface, the first end being disposed upstream relative to the second end in the moving direction, the opening being defined between the first end and the second end, a shortest distance being defined between each of the plurality of sections of the shield electrode and the wire electrode and being a length of a straight line that connects the wire electrode and an imaginary plane extending along the each section and that is perpendicular to the imaginary plane, the shortest distances between the respective sections of the shield electrode and the wire electrode being equal to one another, a first distance defined between the first end and a reference plane being smaller than a second distance defined between the second end and the reference plane, the reference plane including the wire electrode and extending perpendicularly to the photosensitive surface.