| 摘要 |
<p>PROBLEM TO BE SOLVED: To achieve both prevention of toner scattering and a reduction in heat generation due to the slide contact between a sealing member and a nozzle.SOLUTION: A sealing member 333 is provided around an opening/closing member 332 that is brought into contact with a conveyance tube 611 provided on an image forming apparatus side to move a tube insertion port 331 of a powder storage container 32 from a closed position to an open position. The sealing member 333 comprises: a penetration part 333h that is formed, when a direction of movement of the opening/closing member 332 moving from the closed position to the open position is a first movement direction, to have foaming density on the downstream side in the first movement direction higher than that on the upstream side, and through which a conveyance tube opening/closing member 612 can penetrate in the first movement direction, the conveyance tube opening/closing member 612 being provided on the outside of the opening/closing member 332 and conveyance tube 611, where an inner periphery of the penetration part 333h is brought into slide contact with an outer periphery of the opening/closing member 332 in association with the movement from the closed position to the open position; and a slide contact surface 333a that is rotated to be in slide contact relatively with an outer periphery 612r of the conveyance tube opening/closing member 612 at the opening position, and is formed to have friction force on the slide contact surface on the upstream side in the first movement direction lower than that on the downstream side.</p> |
