Image forming apparatus

An image forming apparatus comprising:

• a process cartridge comprised of a frame, a photosensitive drum mounted on the frame, a drum cleaner mounted on the frame for cleaning toner adhering on the photosensitive drum, a static eliminator mounted on the frame for eliminating static on a surface of the photosensitive drum, a charger having two discharge wires and being removably mounted on the frame for uniformly charging the surface of the photosensitive drum, mounting grooves formed on the frame and to which respective end portions of the charger are fitted for removably mounting the charger to the frame, and a contact disposed in only one of the mounting grooves for feeding power to only one of the discharge wires of the charger when any one of the end portions of the charger is fitted to the one of the mounting grooves, the charger and the frame being configured so that in a first position of the charger relative to the frame, one of the end portions of the charger is fitted in the one of the mounting grooves and the contact feeds power to only one of the discharge wires, and so that in a second position of the charger differing by 180 degrees relative to the first position, another of the end portions of the charger is fitted in the one of the mounting grooves and the contact feeds power to only the other of the discharge wires;
• an optical head for irradiating the surface of the photosensitive drum with light to change a charging state thereof;
• and
• a developing device for causing the toner to adhere on the surface of the photosensitive drum in accordance with a charging state of the surface of the photosensitive drum;
• wherein the charger comprises a metal frame, a grid mounted on the metal frame and configured to be positioned opposite to the photosensitive drum, and two wire fixing portions each having two grooves extending along a substantial center in a width direction of the grid, the one of the discharge wires being fitted in one of the two grooves of each of the wire fixing portions, and the other of the discharge wires being fitted in the other of the two grooves of each of the wire fixing portions so that the two discharge wires are arranged parallel to one another along the substantial center in the width direction of the grid.

An image forming apparatus comprising:

• a frame;
• a photosensitive drum mounted on the frame;
• a charger for uniformly charging a surface of the photosensitive drum, the charger comprising a grid configured to be positioned opposite to the photosensitive drum, two wire fixing portions each provided with two grooves, a first discharge wire fitted in one of the two grooves of each of the wire fixing portions, and a second discharge wire fitted in the other of the two grooves of each of the wire fixing portions, the two grooves of each of the wire fixing portions being arranged relative to the grid so that the first and second discharge wires are arranged parallel to one another along a substantial center in a width direction of the grid;
• mounting grooves formed on the frame and to which respective end portions of the charger are fitted for removably mounting the charger to the frame;
• an electrical contact provided in only one of the mounting grooves for feeding power to any one of the first and second discharge wires of the charger;
• an optical head for irradiating the surface of the photosensitive drum with light to change a charging state thereof;
• and
• a developing device for causing toner to adhere on the surface of the photosensitive drum in accordance with a charging state of the surface of the photosensitive drum;
• wherein the charger and the frame are configured so that in a first position of the charger relative to the frame, one of the end portions of the charger is fitted in the one of the mounting grooves and the electrical contact feeds power to only the first discharge wire, and so that in a second position of the charger differing by 180 degrees relative to the first position, the other of the end portions of the charger is fitted in the one of the mounting grooves and the electrical contact feeds power to only the second discharge wire.