Patent ID: 8032052

Claim:
A developing device comprising: a developer carrier for executing developing by affixing developer to an image carrier; a restricting section disposed in contact with said developer carrier for thinning a layer of developer; a restricting mechanism having the restricting section and a support section supporting said restricting section, wherein an edge of the restricting section is engaged with the support section; an elastic sealing section that includes a contact surface contacting said support section and disposed on an edge side in a longitudinal direction of said restricting section, a first surface extending in an installation direction of the restriction section and contacting the restricting section, and a notch having a second surface arranged in a direction substantially transverse to the first surface and configured to engage a part of the support section arranged on an edge side of the restricting section preventing the restricting section from being inserted more than a predetermined amount; and a guiding section for restricting the installation direction of said restricting mechanism at a time when said restricting mechanism is mounted on said elastic scaling section, provided with a guiding surface formed at a prescribed angle in relation to said contact surface of said elastic scaling section, wherein said guiding section is arranged with respect to said elastic sealing section to form a gap for installing said restricting mechanism, and wherein said guiding section extends toward the installation direction of said restricting mechanism, the guiding section including a guiding surface extended at a prescribed angle and a surface extending at a different angle from said guiding surface.