Powdered ink grade sensor

Abstract

A toner level sensor capable of accurately detecting the toner level. It consists of the following units: a piezoelectric oscillation sensor (10), which has a metal vibrating plate (C), a piezoelectric plate (D) and a feedback terminal (F), and is located at a specified position in the toner cartridge (2), When the amount of toner in the toner cartridge (2) does not reach the standard level (LV) and when the current is applied to the piezoelectric disc (D), the first signal (S1) is output from the feedback terminal (F); the oscillation control unit ( 20) When the first signal is received, the feedback terminal will output the second signal when the current of the first signal is not applied to the piezoelectric disc, and the feedback terminal will output the first signal when the current is passed through the piezoelectric disc due to the second signal. signal, so that the feedback terminal of the above-mentioned piezoelectric oscillating sensor outputs an oscillating signal that oscillates from the first signal to the second signal with a certain period; the filter unit (30) outputs a direct current signal (DC) after filtering the oscillating signal (OSC) Delay unit (40), if the direct current signal (DC) remains unchanged in the standard time period and remains valid, then output a valid delay signal (DL), if the direct current signal (DC) is invalid or the direct current signal in the standard time period (DC) then output invalid delay signal (DL) when being a variable signal; Detection unit (50), if the delay signal is valid, then detect that the toner amount of the above-mentioned toner cartridge does not reach the standard level and output a valid output signal (OUT ).

Description

technical field [0001] The present invention relates to a toner level sensor, particularly for detecting the amount of toner in a toner cartridge of an image forming unit in an office unit such as a copier, printer, or facsimile that uses toner to print an image and detecting whether the toner amount is below a standard level and Inform the user of the toner level sensor. Background technique [0002] A copier or a laser printer emits the image data to be printed onto a photoreceptor to form a latent image, and passes through a developing machine so that the latent image is partially stained with toner. When the paper passes between the injector and the charger, it is coated with toner, and is heated and pressed by the fixed ink roller to complete the printing operation. Toner is a consumable and is essential for copiers or laser printers with sensors that detect toner levels. [0003] In the past, the amount of toner was detected by installing a piezoelectric sensor or an...

AI Technical Summary

Problems solved by technology

At this time, even if the amount of toner is sufficient, the amount of toner flowing along with the rotation of the paddle is not considered at all, so that it is detected that the amount of toner is insufficient and the amount of toner is wasted, and the amount of toner cannot be detected correctly.

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