Electro-photographic type image forming device and photosensitive unit provided in the same

A photosensitive unit detachably attached to a main casing of an image forming device in an attaching direction, comprising:

• a plurality of photosensitive bodies juxtaposedly arrayed and spaced away from each other in an array direction, each photosensitive body defining a longitudinal direction and having each end portion in the longitudinal direction, the array direction being an attaching direction of the photosensitive unit relative to the main casing;
• and
• a pair of side plate sections supporting each end portion of each photosensitive body and spaced away from each other in the longitudinal direction, each side plate section having a first positioning contact portion and a contact portion, the first positioning contact portion being positioned at an upstream side of an outer peripheral portion of the pair of side plate sections in the attaching direction, the contact portion being positioned at the upstream side of the outer peripheral portion of the pair of side plate sections and independent of the first positioning contact portion, the first positioning contact portion being contactable with a predetermined portion of the main casing for positioning the pair of side plate sections relative to the main casing when the photosensitive unit is accommodated in the main casing, and the contact portion being contactable with a surface when the photosensitive unit is removed out of the main casing and placed on the surface.

A photosensitive unit movable between an outside position where the photosensitive unit is disposed outside of a main casing of an image forming device and an inside position where the photosensitive unit is accommodated in the main casing, the photosensitive unit configured to move from the outside position to the inside position in an attaching direction, the photosensitive unit comprising:

• a plurality of photosensitive bodies juxtaposedly arrayed and spaced away from each other in an array direction, each photosensitive body defining a longitudinal direction and having each end portion in the longitudinal direction, the array direction being an attaching direction of the photosensitive unit relative to the main casing;
• and
• a pair of side plate sections supporting each end portion of each photosensitive body and spaced away from each other in the longitudinal direction, each side plate section having a first positioning contact portion and a contact portion, the first positioning contact portion being positioned at an upstream side of an outer peripheral portion of the pair of side plate sections in the attaching direction, the contact portion being positioned at the upstream side of the outer peripheral portion of the pair of side plate sections and independent of the first positioning contact portion, the first positioning contact portion being contactable with a predetermined portion of the main casing for positioning the pair of side plate sections relative to the main casing when the photosensitive unit is disposed in the inside position, and the contact portion being contactable with a surface when the photosensitive unit is disposed in the outside position and placed on the surface.