Patent ID: 8036586
Filing Date: 2011-10-11
Classification: G03G

Abstract:
1. A developer delivering device comprising: a first delivering path through which a developer is delivered; a second delivering path through which the developer is delivered, the second delivering path being disposed on a downstream of the first delivering path; a helical delivering blade that is disposed in the second delivering path and delivers the developer by a rotation; and a developer breaking member that is disposed in a connecting portion of the first delivering path and the second delivering path and includes a breaking portion that is disposed opposite to a side wall of the second delivering path in a developer delivering direction of the second delivering path, a contact portion that is in contact with the helical delivering blade and extended in the developer delivering direction between the breaking portion and a center of the rotation of the helical delivering blade, and a coupling portion, the breaking portion having a first breaking portion disposed opposite to one of the side walls of the second delivering path, and a second breaking portion disposed opposite to the other side wall of the second delivering path, the contact portion having a first contact portion extended in the developer delivering direction between the first breaking portion and the center of the rotation of the delivering blade, and a second contact portion extended in the developer delivering direction between the second breaking portion and the center of the rotation of the delivering blade, the coupling portion coupling the first contact portion to the second contact portion, wherein the first breaking portion and the second breaking portion are fixed and supported on the developer delivering path at an upstream end in the developer delivering direction of the second delivering path, and the coupling portion that couples upstream ends in the developer delivering direction of the second delivering path of the first contact portion and the second contact portion, and wherein the developer breaking member further includes a first connecting portion that connects downstream ends in the developer delivering direction of the second delivering path of the first breaking portion and the first contact portion, and a second connecting portion that connects downstream ends in the developer delivering direction of the second delivering path of the second breaking portion and the second contact portion, wherein the contact portion has an approaching tilt portion that is tilted in a direction to approach the helical delivering blade side as compared with the breaking portion, and a separating tilt portion that is provided on a downstream side in the developer delivering direction of the approaching tilt portion and is tilted in a direction to separate from the delivering blade, and an interval between the downstream end in the developer delivering direction of the second delivering path in the breaking portion and an end on the helical delivering blade side of the approaching tilt portion in a direction to approach the center of the rotation of the delivering blade from the breaking portion is smaller than a radius of a rotation from the center of the rotation of the delivering blade.