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Developing device, image forming device including developing device, and method for mounting coil substrate to developing device

A developing device and coil technology, applied to the equipment of the electric recording process using the charge pattern, the electric recording process using the charge pattern, the instrument, etc., can solve the problems of the toner concentration error and the accuracy of the existence, and achieve accurate detection Effect

Inactive Publication Date: 2020-07-31
KYOCERA DOCUMENT SOLUTIONS INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the past, the toner concentration detected by the sensor using the coil sometimes had a large error, and there was a problem of accuracy

Method used

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  • Developing device, image forming device including developing device, and method for mounting coil substrate to developing device
  • Developing device, image forming device including developing device, and method for mounting coil substrate to developing device
  • Developing device, image forming device including developing device, and method for mounting coil substrate to developing device

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Embodiment Construction

[0028] Below, use Figure 1 to Figure 15 Embodiments of the present invention will be described. The invention makes the coil of the sensor as close as possible to the developer, and accurately detects the concentration of the toner. In the following description, a printer 100 (corresponding to an image forming apparatus) including the developing device 1 will be described as an example. However, each element described in this embodiment, such as a structure and arrangement, is not intended to limit the scope of the invention, but is merely an illustration.

[0029] (Overview of Image Forming Apparatus)

[0030] according to figure 1 , the outline of the printer 100 according to the embodiment will be described. A main control unit 2 is provided in the printer 100 . The main control unit 2 controls the operation of the printer 100 . The main control unit 2 is a control board including a control circuit such as a CPU 21 and an image processing unit 22 and an arithmetic ci...

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PUM

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Abstract

A developing device includes a housing for housing therein a developer containing toner and magnetic carrier, and a first sensor including an oscillation circuit and a coil board which is part of the oscillation circuit and on which a coil pattern is formed. A fitting portion formed by recessing an outer surface of the housing is provided in the housing so as to allow the coil board to be fitted at a position closer to the developer than the outer surface of the housing. The coil board is fitted into the fitting portion.

Description

technical field [0001] The present invention relates to a developing device for developing an electrostatic latent image using toner, and an image forming device including the developing device. Background technique [0002] Among image forming apparatuses such as digital multifunction machines, copiers, printers, and facsimile machines, some image forming apparatuses perform printing using a developer (so-called two-component developer) containing a magnetic carrier and toner. During the developing process, only the toner is consumed among the magnetic carrier and the toner. Therefore, when the toner concentration in the developer decreases due to printing, it is necessary to add (replenish) toner to the developer. Here, a sensor using an LC oscillation circuit for the measurement of the toner concentration is used. The frequency of the signal output from the LC oscillation circuit changes according to the toner concentration in the developer (the density of the magnetic ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G03G15/08
CPCG03G15/0853G03G15/0851G03G15/0863G03G15/0865G03G15/09
Inventor 小谷由纪子
Owner KYOCERA DOCUMENT SOLUTIONS INC