JPS59193075U

JPS59193075U - Demagnetizing device for electrical equipment

Info

Publication number: JPS59193075U
Application number: JP8629383U
Authority: JP
Inventors: 明清水; 小原　範信
Original assignee: 株式会社東芝
Priority date: 1983-06-08
Filing date: 1983-06-08
Publication date: 1984-12-21

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of the drawing]

第１図は従来のポータプルタイプ或いは小形カラーテレ
ビジョン受像機に使用した消磁回路を示す回路図、第２
図は消磁電流波形を示す波形図、第３図は本考案に係る
電気機器の消磁装置の一例を示す回路図、第４図は第３
図に示す回路の動作を説明する波形図、第５図は本考案
の他○実施例を示す消磁装置の回路図、第６図は第５図
に示す回路の動作を説明する波形図である。１．１Ａ・・・直流電源、Ｓｌ、Ｓ２・・・電源スィッ
チ、２、　７．　９．　１２．　１３．　１４・・・抵
抗、５・・・消磁コイル、６・・−リレースイッチ、３
，８．１０・・・コンデンサ、１１・・・電界効果トラ
ンジスタ、１５・・・バイポーラトランジスタ。Figure 1 is a circuit diagram showing a degaussing circuit used in a conventional portable type or small color television receiver;
The figure is a waveform diagram showing the degaussing current waveform, FIG. 3 is a circuit diagram showing an example of the degaussing device for electrical equipment according to the present invention, and FIG.
FIG. 5 is a circuit diagram of a degaussing device showing an embodiment of the present invention, and FIG. 6 is a waveform diagram explaining the operation of the circuit shown in FIG. 5. . 1.1A...DC power supply, Sl, S2...Power switch, 2, 7. 9. 12. 13. 14...Resistor, 5...Degaussing coil, 6...-Relay switch, 3
, 8.10... Capacitor, 11... Field effect transistor, 15... Bipolar transistor.

Claims

[Scope of utility model registration request]

(1) A DC power source, a degaussing circuit that is charged at the same time as the DC power is turned on and is configured to flow a degaussing current to the degaussing coil based on the charging voltage, and a degaussing coil that is inserted into this degaussing circuit and turned on and off. The relay switch is equipped with a relay switch for passing a degaussing current through the relay switch, and a drive circuit for the relay switch for driving the relay switch to turn on after a predetermined period of time has elapsed since the DC power is turned on. 1. A degaussing device for electrical equipment, characterized in that a degaussing current is automatically supplied to a degaussing coil of a circuit to perform a degaussing operation.

(2) The drive circuit for the relay switch includes a time constant circuit that is charged when the DC power is turned on, a field effect transistor that is short-circuited when the voltage charged in this time constant circuit reaches a predetermined voltage, and this field effect transistor. and a bipolar transistor for keeping the relay switch in an off state until the field effect transistor is short-circuited and turning on the relay switch by short-circuiting the field-effect transistor. Demagnetizing device for the electrical equipment listed.