Shutter unit, toner storage container, and image forming apparatus

A shutter unit to be installed in a toner container, the shutter unit comprising:

• a shutter to be pushed by a nozzle, in conjunction with movement of the toner container in an insertion direction, to insert the nozzle into the toner container and to communicate the nozzle and the toner container with each other via an opening on a circumferential surface of the nozzle;
• a shutter holder that holds the shutter movable in the insertion direction;
• a seal to contact a circumferential surface of the shutter in a closed state in which the seal is not pressed by the nozzle, the seal to slide on the circumferential surface of the shutter and the circumferential surface of the nozzle during an opening operation in which the shutter is pressed by the nozzle;
• and
• a seal holder to detachably hold the seal at an inner portion of the seal holder,
• wherein:
• the shutter holder and the seal holder are integrated,
• the shutter holder and the seal holder are detachable from each other, and
• the seal holder is to move in the insertion direction while the seal holder rotates in a predetermined rotation direction relative to the shutter holder, to screw a male screw portion of the shutter holder and a female screw portion of the seal holder together to integrate the shutter holder and the seal holder.

A shutter unit to be installed in a toner container, the shutter unit comprising:

• a shutter to be pushed by a nozzle, in conjunction with movement of the toner container in an insertion direction, to insert the nozzle into the toner container and to communicate the nozzle and the toner container with each other via an opening on a circumferential surface of the nozzle;
• a shutter holder that holds the shutter movable in the insertion direction;
• a seal to contact a circumferential surface of the shutter in a closed state in which the seal is not pressed by the nozzle, the seal to slide on the circumferential surface of the shutter and the circumferential surface of the nozzle during an opening operation in which the shutter is pressed by the nozzle;
• and
• a seal holder to detachably hold the seal at an inner portion of the seal holder,
• wherein:
• the shutter holder and the seal holder are integrated,
• the shutter holder and the seal holder are detachable from each other, and
• the seal holder is to move relative to the shutter holder in the insertion direction to engage an engaging portion of the shutter holder and an engaged portion of the seal holder with each other, to integrate the shutter holder and the seal holder.