Image forming apparatus and toner cartridge

An image-forming apparatus to which a toner cartridge is detachably attached and toner is supplied from the toner cartridge into the image-forming apparatus, the image forming apparatus comprising:

• an engagement portion that is fixedly provided;
• and
• a locking mechanism that is moved either to a locking position or to a non-locking position;
• wherein the locking mechanism is at a non-locking position shortly after the toner cartridge has been attached to the image forming apparatus;
• wherein when a user operates an operating member of the toner cartridge after the toner cartridge has been attached to the image forming apparatus, the operating member engages the locking mechanism to cause the locking mechanism to move to the locking position where the locking mechanism limits movement of the operating member relative to the engagement portion to prevent the toner cartridge from being detached from the image forming apparatus;
• wherein the engagement portion is a guide pin projecting from the image forming apparatus and the locking mechanism includes an urging member and a locking member urged by the urging member;
• wherein when the locking mechanism is at the non-locking position, the urging member urges the locking member against the guide pin;
• wherein when the operating member is moved after the toner cartridge has been attached to the image forming apparatus, the operating member causes the locking member to move out of engagement with the guide pin and then to move to the locking position.

A toner cartridge that holds toner therein and is detachably attached to an image forming apparatus, the toner cartridge comprising:

• a operating member that is operated to drive the toner cartridge, the operating member having a path;
• a locking member slidably received in the path and moved either to a locking position where the locking member is not movable relative to the operating member or to a non-locking position where the locking member is movable relative to the operating member;
• wherein when the toner cartridge has been attached to the image forming apparatus, the locking member engages an engagement portion of the image forming apparatus;
• wherein shortly after the toner cartridge has been attached into the image forming apparatus, the locking member is at the non-locking position;
• wherein when a user operates the operating member after the toner cartridge has been attached into the image forming apparatus, the locking mechanism moves to the locking position so that the locking mechanism limits movement of the operating member relative to the engagement portion so that the toner cartridge is not allowed to be detached from the image forming apparatus.

A combination of a toner cartridge that holds toner therein and a process cartridge to which the toner cartridge is attached, wherein the process cartridge comprises:

• a developing unit that receives toner from the toner cartridge and holds the toner therein;
• and
• a through-hole formed in the developing unit;
• wherein the toner cartridge comprises:
• a recess substantially in line with the through-hole;
• a pin member inserted into the recess through the through-hole in such a way that the pin member extends through the through-hole and the recess to prevent the toner cartridge from being detached from the developing unit, wherein the pin member includes a resilient projection that resiliently deforms when the pin member is inserted in a first direction into the through-hole and resiliently returns to its original shape so that the resilient projection prevents the pin member from being pulled out of the through-hole in a second direction opposite to the first direction.

A combination of a toner cartridge that holds toner therein and a process cartridge to which the toner cartridge is attached, wherein the process cartridge comprises:

• a toner cartridge receiving section into which the toner cartridge is attached;
• a projection that extends into the toner cartridge receiving section;
• and
• a locking mechanism that is moved either to a locking position or to a non-locking position;
• wherein the toner cartridge comprises:
• an operating member movable to pivot relative to a body of the toner cartridge, the operating member including a first path extending in a first direction and a second path communicating with the first path and extending in a second direction at an angle with the first path;
• wherein when the toner cartridge is inserted into the toner cartridge receiving section in the first direction, the projection enters the first path;
• wherein when the operating member is pivoted relative to the body in a third direction after the toner cartridge has been received in the toner cartridge receiving section, the projection enters the second path and the operating member causes the locking mechanism to move to from the non-locking position to the locking position where the first path communicates with the second path, the locking mechanism prevents the projection from entering the first path so that the toner cartridge becomes unable to move in a fourth direction opposite to the first direction.