| 摘要 |
A developing unit for developing a latent image formed on an electrophotographic photosensitive member, includes a developing member for developing the latent image formed on the electrophotographic photosensitive member with developer, a developer containing member for containing the developer, a supply opening provided in the developer containing member and adapted to supply the developer contained within the developer containing member to the developing member, a seal member for sealably sealing the supply opening, a grip member connected to the seal member and to be gripped when the supply opening is unsealed, a support portion for supporting the grip member, the grip portion being capable of being separated from the support portion by bending the grip member with respect to the support portion, and first and second abutment portions which can abut against each other when the grip member is bent with respect to the support portion to locally generate great stress along a longitudinal direction of a separation portion at which the grip member is separated from the support portion.
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