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Developing device

A developing device and developing agent technology, which is applied in the direction of instruments, electrical recording process equipment using charge patterns, optics, etc., can solve the problems that the position of the coil pattern is easy to deviate from the expected position, affecting the detection accuracy of the sensor, etc.

Inactive Publication Date: 2022-07-26
CANON KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the configuration disclosed in JP-U Hei6-76961, a printing plate formed separately from the developer container is mounted on the inner wall surface of the developer container, and therefore, the position of the coil pattern is easily deviated from the desired position due to mounting tolerances and the like.
In this case, this deviation may affect the detection accuracy of the sensor

Method used

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Embodiment Construction

[0022] will use Figure 1 to Figure 6 The first embodiment is described. First, will use figure 1 The schematic structure of the image forming apparatus of the present embodiment is described.

[0023] [Imaging equipment]

[0024] The image forming apparatus 100 of the present embodiment is a full-color printer including an image reading section 1R for reading an image of an original and an image output section 1P for outputting the read image onto a recording material. That is, the image forming apparatus 100 optically reads the original image by the image reading section, and transmits an image signal for each of the color components to the image output section 1P. In the image reading section 1R, the original is placed on the original (support) platen, and when the user presses the copy button, the original is irradiated with light from the light source, and the light reflected by the original is received by the image sensor 90 via the mirror . The reflected light from...

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PUM

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Abstract

The present disclosure relates to a developing device including: a developer bearing member for bearing a developer containing toner and a carrier for developing an electrostatic latent image formed on an image bearing member; a developer container for accommodating the developer; and an oscillation circuit including a resonance circuit constituted by a coil and a circuit portion including a capacitor, and configured to oscillate a signal for detecting a toner concentration of the developer contained in the developer container. The coil is formed on an inner wall surface of the developer container.

Description

technical field [0001] The present invention relates to a developing device that develops an electrostatic latent image using toner on an image bearing member such as a photosensitive drum. Background technique [0002] In an image forming apparatus, an electrostatic latent image on an image bearing member such as a photosensitive drum is developed by a developing device. As the configuration of the developing device, a configuration in which development is performed by using a developer containing a toner and a carrier has generally been used. In such a developing device, it is necessary to appropriately detect the toner concentration in the developing device. [0003] As a sensor for detecting the toner density, a configuration that detects the toner density from a change in the inductance of a coil of an oscillation circuit is generally known. For example, Japanese Patent Application Laid-Open (JP-U) Hei 6-76961 discloses a toner density detection sensor in which a spir...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03G15/08
CPCG03G15/0851G03G15/0853G03G15/0889G03G15/086
Inventor 祖父江文孝猪浩一朗畑洋介森谷正明根岸典央
Owner CANON KK