Process cartridge and potential detection part

A process cartridge, detachably installed in an image-forming apparatus main body, comprising:

• a cartridge body;
• and
• a photosensitive drum, rotatably installed at the cartridge body, wherein the photosensitive drum is disposed with an image-forming region capable of generating an electrostatic latent image,
• wherein:
• the cartridge body includes a potential detection part setting region configured to dispose a potential detection part;
• when the potential detection part is installed at the potential detection part setting region, the potential detection part is configured to detect an electrical signal on the image-forming region;
• and
• the potential detection part setting region includes a first region corresponding to a detection starting portion of the potential detection part and a second region corresponding to a detection ending portion of the potential detection part;
• a maximum distance along a first direction between orthographic projections of the first region and the second region on the imaging area is L1, and a length of the image-forming region along the first direction is L2, wherein L1/L2>1/3;
• and the first direction is in parallel with an axis direction of the photosensitive drum.

A potential detection part, configured to be disposed on a process cartridge, wherein:

• when the potential detection part is installed on the process cartridge, the potential detection part is configured to detect an electrical signal on an image-forming region of a photosensitive drum,
• wherein:
• the potential detection part includes a detection starting portion and a detection ending portion;
• the detection starting portion and the detection ending portion respectively correspond to a detection starting position and a detection ending position of a detectable region of the potential detection part along a first direction;
• a maximum distance along the first direction between orthographic projections of the detection starting portion and the detection ending portion on the image-forming region is L1;
• a length of the image-forming region along the first direction is L2;
• the first direction is in parallel with an axis direction of the photosensitive drum;
• and L1/L2>1/3.