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Electronic apparatus

A technology of electronic equipment and AC power supply, which is applied to the equipment of electrical recording technology applying charge pattern, electrical recording technique, measurement of electrical variables, etc.

Inactive Publication Date: 2016-01-06
KYOCERA DOCUMENT SOLUTIONS INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide an electronic device in view of the above problems, which can solve the problems of the prior art and can prevent the problem of false detection of sensor output caused by AC power line noise

Method used

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  • Electronic apparatus
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no. 1 approach 〕

[0016] Next, a first embodiment of the present invention will be specifically described with reference to the drawings.

[0017] The electronic equipment of the present embodiment is an image forming apparatus 100 such as a copying machine. Refer to figure 1 , which includes: a document reading unit 120 , a document feeding unit 130 , and a recording unit 140 . Document reading unit 120 is provided above recording unit 140 , and document feeding unit 130 is provided above document reading unit 120 . In addition, a touch panel device 10 is provided on the front side of the image forming apparatus 100 , and the touch panel apparatus 10 performs settings or operation instructions on the image forming apparatus 100 . The image forming apparatus 100 of the present invention will be described taking a copier as an example, but the image forming apparatus 100 of the present invention may also include devices such as scanners and multi-function machines.

[0018] The document readin...

no. 2 approach 〕

[0039] A second embodiment of the present invention relates to an electronic device including a heater and a sensor such as a photoelectric sensor.

[0040] refer to Figure 4 , the electronic device of this embodiment is an image forming apparatus 100 such as a copier, and figure 1 The same symbols represent the same constituent elements.

[0041] In the second embodiment, the paper feeding unit 160 includes a plurality of paper feeding cassettes 161 a to d for storing the recording paper P, and the recording paper P is discharged one by one from the paper feeding cassettes 161 a to d to the conveyance path 170 . The paper feed roller 162, the paper cassette heater 163 for dehumidifying the recording paper P stored in the paper feeding cassettes 161a-d, and the detection of the recording paper P discharged from the paper feeding cassettes 161a-d The delivery switch 7. The paper feed roller 162 , the conveyance roller 181 , and the discharge roller 182 function as a conveya...

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Abstract

Provided is an electronic apparatus that can prevent erroneous detection of a sensor output due to an AC line noise. A power supply circuit includes a noise filter, input rectifying smoothing circuit, converter circuit, and output smoothing circuit. The input rectifying smoothing circuit rectifies an input AC voltage passed through the noise filter to a pulsating flow and then smooth it. The converter circuit converts a DC voltage rectified and smoothed into a desired output voltage. The output smoothing circuit smoothes the convert output voltage to supply it to a control part. The noise determination part detects a noise that could not have been removed by the noise filter, as an AC line noise. The control part invalidates a detection signal outputted from the sensor for a previously set invalid period from the moment the AC line noise has been detected.

Description

technical field [0001] The present invention relates to an electronic device equipped with a sensor such as a photoelectric sensor. Background technique [0002] An image forming apparatus as an electronic device includes various sensors for detecting recording paper and motion, and is configured such that a control unit controls the operation of the apparatus based on detection signals output by the sensors, hereinafter referred to as “sensor output”. The control unit is powered by a commercial AC power supply through the power circuit, but depending on the commercial AC power supply, noise may be generated in the power line. This noise affects the sensor output or the control unit as AC power line noise, and the control unit may erroneously detect the sensor output. Therefore, in order to remove AC power line noise, the power supply circuit includes a noise filter composed of capacitors and the like, and a noise filter that performs differential amplification processing u...

Claims

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Application Information

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IPC IPC(8): G03G15/00
CPCG03G15/5004G03G15/80G01R29/26G01R35/00G03G21/00G01R15/12G01R15/144
Inventor 藤原研介
Owner KYOCERA DOCUMENT SOLUTIONS INC
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