DEVELOPING DEVICE AND IMAGE FORMING APPARATUS THEREWITH

摘要

A developing device includes: a developer container having first and second transport passages, for containing developer; a developer carrier for carrying, on its surface, developer inside the second transport passage; a first stirring/transporting member having a rotary shaft and a transport blade formed on its circumferential surface, for stirring/transporting developer inside the first transport passage; a second stirring/transporting member for stirring/transporting developer inside the second transport passage in a direction opposite to the first stirring/transporting member; a first developer passing portion for delivering developer from the first to the second transport passage; and a second developer passing portion for delivering developer from the second to the first transport passage. In a part of the first stirring/transporting member facing the first developer passing portion, a paddle portion is formed which is devoid of the rotary shaft and which has a plurality of first ribs parallel to the rotary shaft.

主权项

1. A developing device comprising:
a developer container having a first transport passage and a second transport passage arranged substantially parallel to each other, the developer container storing developer containing toner; a developer carrier rotatably supported on the developer container, the developer carrier carrying, on a surface thereof, the developer inside the second transport passage; a first stirring/transporting member composed of a rotary shaft and a transport blade formed on a circumferential surface of the rotary shaft, the first stirring/transporting member stirring and transporting the developer inside the first transport passage; a second stirring/transporting member stirring and transporting the developer inside the second transport passage in a direction opposite to the first stirring/transporting member; a first developer passing portion through which the developer is delivered from the first transport passage to the second transport passage; a second developer passing portion through which the developer is delivered from the second transport passage to the first transport passage; and a paddle portion formed in a part of the first stirring/transporting member facing the first developer passing portion, the paddle portion being devoid of the rotary shaft and including a plurality of first ribs parallel to the rotary shaft.