Patent ID: 8554117
Filing Date: 2013-10-08
Classification: G03G

Abstract:
1. A toner cartridge, comprising: a toner containing section which contains a toner therein; a toner discharging section which is disposed in one side of the toner containing section and has a toner discharging port; a screw member which is disposed inside the toner containing section and transports a toner inside the toner containing section toward the toner discharging section; a bearing member which holds an end of the screw member; a shutter member which is disposed in the toner discharging section to be rotatable about a rotation axial line of the screw member and has a circular-are-shaped cross-section; and a shutter opening and closing mechanism which opens the shutter member in conjunction with rotation of the screw member, the shutter opening and closing mechanism including: a claw piece which has a claw portion fixed to the shutter member; an operation piece which is disposed in the screw member and presses the claw piece; and two engaging notch portions disposed at a distance from each other in a circumferential direction of the bearing member, the claw portion being engaged with one of the two engaging notch portions, wherein the claw portion of the claw piece is engaged with a first engaging notch portion of the two engaging notch portions, the claw piece is located at a position where the claw piece is operable by the operation piece and a closed state of the toner discharging port using the shutter member is maintained, and wherein when the screw member starts to rotate, the operation piece presses the claw piece, and engaging state of the claw portion with respect to the first engaging notch portion is released, the shutter member opens the toner discharging port in conjunction with rotation of the screw member, and then the claw portion of the claw piece is engaged with a second engaging notch portion of the two engaging notch portions by the rotation of the screw member and the claw piece is retreated from a position pressed by the operation piece and an opening state of the toner discharging port using the shutter member is maintained.