Developing box

Abstract

The invention provides a developing box which comprises a box body, a developing roller, a driving force receiving head, a detection mechanism, a transmission shaft and a sleeve, the box body is provided with a carbon powder containing part and a powder outlet, the developing roller is rotatably supported at the powder outlet, the driving force receiving head is arranged on the first end wall of the box body, a tooth part is arranged on the peripheral wall of the driving force receiving head, the detection mechanism is arranged on the second end wall of the box body, the transmission shaft is columnar and extends in the length direction of the box body, the transmission shaft is rotatably installed in the carbon powder containing part, a first end of the transmission shaft is provided with a first driving wheel, the first driving wheel and the driving force receiving head are located on the same side of the box body, and the first driving wheel is in transmission connection with the driving force receiving head. The second end of the transmission shaft is provided with a second driving wheel which is matched with the rotating piece. A mounting cavity isolated from the carbon powder containing part is formed in the sleeve, and the transmission shaft is located in the mounting cavity and is in clearance fit with the sleeve. The developing box can reduce the torque generated by rotation.

Description

technical field [0001] The invention relates to the field of electrophotographic imaging, in particular to a developing box. Background technique [0002] Imaging equipment usually uses a detachable developing cartridge to provide toner to develop the electrostatic latent image on the photosensitive member, and then transfer it to a medium such as paper to form a visible image. [0003] An existing developing cartridge includes a box body, the two axial ends of the box body are respectively provided with a drive head and a detection wheel with missing teeth, the box body has a developer storage chamber and a powder outlet for accommodating the developer, and the developer storage chamber There is a stirring frame for stirring the developer inside, the developing roller is set at the powder outlet, the gear train driving the stirring frame and the developing roller to rotate is installed outside the box body, the first axial end of the stirring frame is provided with a first ...

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem that when the driving head drives the developing roller, the powder feeding roller, and the stirring frame to rotate, the driving force receiving head receives a large rotational twisting force and a large torque, which easily damages the driving head in the imaging device, etc., the applicant published in CN110727186A The patent document of discloses a kind of development cartridge, transmits the rotational driving force by setting the transmission shaft, thereby reduces the torque of rotation, but, because in actual use, the toner accommodating part of the development cartridge is full of toner, so when the transmission shaft rotates When the driving force is transmitted, the outer peripheral wall of the transmission shaft will form friction with the stopper and the toner. During the rotation of the transmission shaft, the friction force needs to be overcome to generate torque. Therefore, the transmission head of the imaging device will still be subject to a large torque, which will Reduced lifespan of imaging equipment

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