Power receiving unit and processing cartridge

A power receiving unit configured for cooperating with a driving unit generating a driving force of an electronic imaging apparatus to transmit a power to rotate a photosensitive drum of the electronic imaging apparatus, the driving unit including a driving component and a braking force component arranged side by side along a same axis, the power receiving unit comprising:

• a mounting portion, configured for mounting the power receiving unit on an end of the photosensitive drum of the electronic imaging apparatus,
• the power receiving unit is further configured to be coaxially engaged with the driving component, and driven by the driving component to drive the photosensitive drum to rotate, such that the driving component is moved along the axis, and the power receiving unit further including:
• applying the driving force to a surface of the photosensitive drum, the power receiving unit is restricted from rotating when the driving force surface is abutted the braking force component, the braking force component is used to provide a force opposite to the driving force to the power receiving unit,
• the power receiving unit is further configured to engage with a braking force engagement member of the braking force component and the driving component;
• the power receiving unit further including:
• a main body portion and a pressing portion, wherein the main body portion is mounted on an end of the photosensitive drum, the pressing portion protrudes from one end of the main body portion away from the photosensitive drum and is in contact with the braking force engagement member;
• when the power receiving unit is rotating, the power receiving unit is pressured by the braking force engagement member and does not receive a braking force of the braking force component of the electronic imaging apparatus,
• a force applied by the pressing portion to the braking force engagement member is configured to cause the braking force engagement member to move along a rotation axis of the driving unit in a direction away from the photosensitive drum.