Patent ID: 7769317
Filing Date: 2010-08-03
Classification: G03G

Abstract:
1. A developing device comprising: a housing having a developer container part and an opening, the developer container part containing a developer, and the opening allowing the developer to flow through; a developer carrier that is rotatably attached to the housing, and holds and carries the developer contained in the developer container part to a developing area facing the image carrier; a sheet member that is provided on the housing and seals the opening when not used, and is pulled out in one direction to open the opening when used, the sheet member being folded back toward the opening and sealing the opening, the sheet member including a forward part and a backward part, the forward part extending from a base end to a folded part of the sheet member, and the backward part extending in the one direction from the folded part to a free end as a top end of the sheet member, protruding to the outside of the housing; and a press unit that presses the backward part of the sheet member toward the forward part when not used, wherein the housing has a guide hole, the guide hole being formed in a position of the housing where the backward part of the sheet member gradually separates off from the forward part and from the folded part to the free end, the backward part of the sheet member being inserted into the guide hole when not used, and the sheet member being guided by the guide hole when the sheet member is pulled out.