| 主权项 |
1. An image forming apparatus comprising:
a toner case including a discharge port configured to discharge a toner, and an installed part to which the toner case is detachably installed, wherein, on the circumference of the toner case, a locking piece is provided, the installed part includes a locking member configured to cover at least apart of the circumference of the toner case, the locking member includes: an insertion depression arranged along an installing direction of the toner case to the installed part and configured to be capable of insertion of the locking piece; an engaging piece configured to move between a protrusive position arranged to protrude to the insertion depression at predetermined length and a withdrawn position arranged to withdraw further than the protrusive position from the insertion depression in intersecting directions with the installing direction; and a biasing member configured to bias the engaging piece to the protrusive position side, in the insertion depression, a first position, a second position being further than the first position in the installing direction and a third position being further than the second position in the installing direction are provided, while the toner case is installed to the installed part, when the locking piece is inserted to the first position, the locking piece presses the engaging piece so that the engaging piece moves from the protrusive position to the withdrawn position against biasing force of the biasing member, when the locking piece is inserted to the second position, the engaging piece presses the locking piece to the far side in the installing direction by biasing force of the biasing member, and when the locking piece is inserted to the third position, the engaging piece stops the locking piece in an engaged state so that the movement of the locking piece toward the near side in the installing direction is restricted. |
