Developer container, development device, and image formation apparatus that have shutter movement restriction member to restrict movement of shutter member

A developer container comprising:

• a developer container body including a developer supply port configured to supply a developer stored inside the developer container body to outside the developer container body;
• and a first shutter movement restriction groove provided on a surface of the developer container body;
• a shutter member provided to be movable over a region of the developer container body from a close position to an open position of the developer supply port while being in a sliding contact with the surface where the first shutter movement restriction groove is formed, the shutter member including a second shutter movement restriction groove configured to form a guide path with the first shutter movement restriction groove by facing the first shutter movement restriction groove when the shutter member closes the developer supply port at the close position;
• and
• a shutter movement restriction member movably provided in the guide path formed by the first shutter movement restriction groove and the second shutter movement restriction groove, the shutter movement restriction member configured to be positioned in both the first shutter movement restriction groove and the second shutter movement restriction groove depending on an inclination of the developer container body, and thereby to restrict a movement of the shutter member in an open direction from the close position to the open position,
• wherein the second shutter movement restriction groove includes a chevron-shaped guide rib protruding toward the first shutter movement restriction groove such that the guide rib has inclination surfaces substantially parallel with inclination surfaces extending from a deepest portion of the first shutter movement restriction groove toward shallow portions on edges on both sides thereof.

A developer container comprising:

• a developer container body including a developer supply port configured to supply a developer stored inside the developer container body to outside the developer container body;
• and a first shutter movement restriction groove provided on a surface of the developer container body;
• a shutter member provided to be movable over a region of the developer container body from a close position to an open position of the developer supply port while being in a sliding contact with the surface where the first shutter movement restriction groove is formed, the shutter member including a second shutter movement restriction groove configured to form a guide path with the first shutter movement restriction groove by facing the first shutter movement restriction groove when the shutter member closes the developer supply port at the close position;
• and
• a shutter movement restriction member movably provided in the guide path formed by the first shutter movement restriction groove and the second shutter movement restriction groove, the shutter movement restriction member configured to be positioned in both the first shutter movement restriction groove and the second shutter movement restriction groove depending on an inclination of the developer container body, and thereby to restrict a movement of the shutter member in an open direction from the close position to the open position,
• wherein except when the developer container body is in a position where the developer supply port faces substantially downside in a vertical direction, the shutter movement restriction member is positioned in both the first shutter movement restriction groove and the second shutter movement restriction groove to restrict the movement of the shutter member in the open direction from the close position to the open position.