| CPC G03G 21/1871 (2013.01) [G03G 21/1652 (2013.01); G03G 21/1814 (2013.01); G03G 21/1842 (2013.01)] | 17 Claims |
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1. An image forming apparatus comprising:
a unit including an electrical contact surface and a power receiving member configured to receive supply of electric power via the electric contact surface; and
a main assembly to which the unit is detachably mounted, the main assembly including
a contact member configured to supply the electric power to the power receiving member in contact with the electrical contact surface of the unit, the contact member being a wire spring including a coil portion and an arm portion which extends from the coil portion and which has a free end, wherein the arm portion includes a first portion, a contact portion, a second portion, a third portion, and a fourth portion in a named order between the coil portion and the free end,
wherein the main assembly includes a supporting member provided with a supporting portion for supporting the coil portion,
wherein when a mounting and dismounting direction of the unit is a first direction, a direction which is a direction of a center axis of the coil portion and which crosses the first direction is a second direction, and a direction crossing the first direction and the second direction is a third direction,
the first portion, the contact portion, and the second portion are arranged along the first direction,
the contact portion is configured to contact the electrical contact surface,
the first portion extends so as to approach the electrical contact surface as the first portion approaches the contact portion from the coil portion in the first direction,
the second portion extends away from the electrical contact surface as the second portion extends from the contact portion in the first direction toward a direction away from the first portion, and
the third portion extends toward the second direction,
wherein the supporting member includes an opposite wall which opposes a side surface of the unit provided with the electrical contact surface and which is provided with an opening extending in the first direction,
wherein the contact portion projects in the third direction through the opening toward a side where the electrical contact surface is present with respect to the opposite wall,
wherein the contact member is provided so that the third portion and the fourth portion are present on a side opposite from the side where the electrical contact surface is present with respect to the opposite wall, and
wherein the fourth portion of the contact member extends toward the third direction as viewed in the first direction.
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