Image forming apparatus having cyclonic separating portion, toner container, and developing apparatus

An image forming apparatus comprising:

• a photosensitive drum;
• a developer container constituting a toner accommodating space for accommodating toner;
• a developing roller configured to rotate about a rotation axis, the developing roller including a toner bearing portion configured to bear the toner accommodated in the developer container and supply the toner to the photosensitive drum;
• and
• a cyclonic separating portion including an intake port, a first discharge port communicating with an interior of the developer container, and a second discharge port communicating with an outside of the developer container, the cyclonic separating portion being configured to take in air mixed with the toner through the intake port, separate the toner and the air from each other, discharge the toner separated from the air through the first discharge port, and discharge the air separated from the toner through the second discharge port,
• wherein the cyclonic separating portion is provided on an upper surface portion of the developer container in a direction of gravity,
• wherein the cyclonic separating portion includes a conical portion formed in a conical frustum shape whose radius decreases as the conical frustum shape extends downward in the direction of gravity,
• wherein the first discharge port is disposed at a lower end portion of the conical portion,
• wherein at least a portion of the conical portion projects downward, in the direction of gravity, with respect to an inner upper surface of the developer container constituting the toner accommodating space in the direction of gravity,
• wherein the intake port of the cyclonic separating portion opens toward an end of the developing roller in a direction of the rotation axis, and
• wherein in the direction of the rotation axis, the first discharge port is disposed between positions of both ends of the toner bearing portion in the direction of the rotation axis.

An image forming apparatus comprising:

• a photosensitive drum;
• a developer container constituting a toner accommodating space for accommodating toner;
• a developing roller configured to rotate about a rotation axis, the developing roller including a toner bearing portion configured to bear the toner accommodated in the developer container and supply the toner borne by the toner bearing portion to the photosensitive drum;
• and
• a cyclonic separating portion including an intake port, a first discharge port communicating with an interior of the developer container, and a second discharge port communicating with an outside of the developer container, the cyclonic separating portion being configured to take in air mixed with the toner through the intake port, separate the toner and the air from each other, discharge the toner separated from the air through the first discharge port, and discharge the air separated from the toner through the second discharge port,
• wherein in a direction of the rotation axis, the first discharge port is disposed between positions of both ends of the toner bearing portion in the direction of the rotation axis, and
• wherein the intake port of the cyclonic separating portion opens toward an end of the developing roller in the direction of the rotation axis.