Image-forming machine

An image-forming machine comprising:

• a machine housing;
• a photosensitive material drum disposed in said machine housing;
• a movable mounting plate disposed in said machine housing in a manner to be moved toward, and away from, said photosensitive material drum;
• a developing device detachably mounted on said movable mounting plate from the front side of said machine housing;
• a push-operation mechanism for moving said developing device and said movable mounting plate between a push position close to said photosensitive material drum and a push-release position moved away from said push position;
• and
• a toner-replenishing device allowed to move between an acting position where a toner can be fed to said developing device and an open position moved away from said acting position;
• wherein
• said push-operation mechanism is equipped with a push lever disposed on the front side corresponding to a position where said movable mounting plate is mounted on said machine housing;
• and
• said push lever is allowed to move between a first position where the developing device is brought to said push position and a second position where the developing device is brought to said push-release position, and when said push lever is brought to said first position, said toner-replenishing device is allowed to move to said acting position from said open position and when said push lever is brought to said second position, said toner-replenishing device is inhibited from moving to said acting position from said open position.

An image-forming machine comprising:

• a machine housing;
• a photosensitive material drum disposed in said machine housing;
• a movable mounting plate disposed in said machine housing in a manner to be moved toward, and away from, said photosensitive material drum;
• a developing device detachably mounted on said movable mounting plate from the front side of said machine housing;
• and
• a push-operation mechanism for moving said developing device and said movable mounting plate between a push position close to said photosensitive material drum and a push-release position moved away from said push position;
• wherein
• said push-operation mechanism is equipped with a push spring means for urging said developing device and said movable mounting plate toward said photosensitive material drum at all times, and a push lever disposed on a front side opposed to a position where said movable mounting plate is mounted on said machine housing;
• said push lever is allowed to move between a first position where said developing device is brought to said push position and a second position where said developing device is brought to said push-release position and where said push lever works as a guide terrace for attaching or detaching said developing device;
• and
• a resilient force of said push spring means acts in a direction to hold said push lever at said second position in a state where said push lever is at said second position.