Developing cartridge and method for detecting remaining toner amount thereof, and electronic imaging device
A technology for developing cartridges and detecting electrodes, which is applied to equipment for electric recording technology using charge patterns, electrography, and electric recording technology using charge patterns, etc., which can solve the problems of increased production costs of developing cartridges and complex detection circuits, etc.
Active Publication Date: 2022-03-01
PRINT RITE UNICORN IMAGE PROD CO LTD
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Problems solved by technology
However, in this solution, it is necessary to install electrodes at two different positions on the bottom wall of the powder bin, and it is also necessary to detect the capacitance value between one of the detection electrodes and the developing roller. The detection circuit is relatively complicated, and when the powder bin is assembled, an auxiliary The detection circuit will lead to an increase in the production cost of the developing cartridge
Method used
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[0037] The developing cartridge of this embodiment is installed in the electronic imaging device, wherein the electronic imaging device can be a device for forming images such as a laser printer, the electronic imaging device is provided with a casing, and a developing cartridge installation cavity is arranged in the casing, and the developing cartridge Installed into the mounting cavity.
[0038] see Figure 4 , the developing box has a box body, and the box body includes a bottom box 30, an upper cover ( Figure 4 Hidden) and two end covers 31, 32 form a powder bin for containing carbon powder in the box body, a developing roller 35 and a stirring device 40 are arranged in the powder bin, and a photosensitive drum is also arranged in the box body. After the developing box is installed in the electronic imaging device, the toner in the developing box will be continuously sent out from the developing box.
[0039] see Figure 5 , the stirring device 40 has a rotating shaft 41...
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The invention provides a developing cartridge, a method for detecting the residual amount of toner, and an electronic imaging device. The developing cartridge includes a cartridge body, a powder bin is arranged in the cartridge body, and a stirring device is arranged in the powder bin. The stirring device includes a rotating shaft and a self-rotating shaft. The stirring blade whose shaft extends in the radial direction, and the rotating shaft is supported between the two end walls of the box body; wherein, the inner wall of the powder bin is provided with a detection circuit board, and the detection circuit board is provided with a detection electrode, and the radial end of the stirring blade can be Abutting on the surface of the detection circuit board, the detection circuit board is arranged parallel to the rotating shaft; the detection circuit board is provided with a comparison circuit, and the comparison circuit receives the reference capacitance value and the capacitance change value before and after the stirring blade sweeps the detection electrode, and compares the reference capacitance value. and the magnitude of the change in capacitance. The method includes judging whether the remaining amount of toner is sufficient according to the difference between the capacitance values before and after the detection circuit board is scraped by the stirring blade and the reference capacitance value. The developing cartridge detection circuit of the invention is simple, and the production cost is low.
Description
technical field [0001] The present invention relates to the technical field of printing consumables used in laser printers, in particular to a developer box, an electronic imaging device using the developer box, and a method for detecting the remaining amount of toner in the developer box. Background technique [0002] In electronic imaging equipment, such as electrostatic copiers or digital copiers and all-in-one printers, there is a developing device for developing the electrostatic latent image formed on the photosensitive drum. The developing device lays toner on the electrostatic latent image and develops it. . An existing developing device is composed of a photosensitive component unit provided with a photosensitive drum and a developing unit of a developing roller, and the toner consumed for developing is generally provided by a powder bin in the developing unit. In the actual development process, in addition to the toner actually needed for development and printing,...
Claims
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IPC IPC(8): G03G15/00G03G15/08
CPCG03G15/087G03G15/0889G03G15/556
Inventor 苏健强袁道明杨晓锋
Owner PRINT RITE UNICORN IMAGE PROD CO LTD