MALFUNCTION PREVENTION DEVICE, IMAGE FORMING APPARATUS, AND MALFUNCTION PREVENTION METHOD

To prevent a malfunction of a protective circuit to continue the operation of a control unit even after a power switch is switched off.SOLUTION: A malfunction prevention device comprises: a power supply circuit 7 that is connected with an external power supply 100 and generates a first power supply...

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Bibliographic Details
Main Authors EGUCHI TATSUYA, WATANABE TAKASHI, HAYASHI AKIHIRO
Format Patent
LanguageEnglish
Japanese
Published 14.03.2023
Subjects
CINEMATOGRAPHY
CORRECTION OF TYPOGRAPHICAL ERRORS
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
ELECTROGRAPHY
ELECTROPHOTOGRAPHY
HOLOGRAPHY
i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME
LINING MACHINES
MAGNETOGRAPHY
PERFORMING OPERATIONS
PHOTOGRAPHY
PHYSICS
PICTORIAL COMMUNICATION, e.g. TELEVISION
PRINTING
SELECTIVE PRINTING MECHANISMS
STAMPS
TRANSPORTING
TYPEWRITERS
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Summary:To prevent a malfunction of a protective circuit to continue the operation of a control unit even after a power switch is switched off.SOLUTION: A malfunction prevention device comprises: a power supply circuit 7 that is connected with an external power supply 100 and generates a first power supply output V1 and a second power supply output V2 from the external power supply 100; a control unit 8 that operates with the first power supply output V1 of the power supply circuit 7; a drive mechanism 70 that operates with the second power supply output V2 of the power supply circuit 7; a power supply switch 66 that switches off the second power supply output V2 in the power supply circuit 7; and a protection circuit (second output protection circuit 55) that protects the power supply circuit 7 while the second power supply output V2 is abnormal. When the second power supply output V2 is switched off by the power supply switch 66 in the operating state of the drive mechanism 70, the control unit 8 prevents a malfunction of the protection circuit.SELECTED DRAWING: Figure 3 【課題】保護回路の誤動作を防止し、電源スイッチがオフに切り替えられた後にも、制御部の動作を継続できるようにする。【解決手段】誤動作防止装置は、外部電源１００に接続され、外部電源１００から第１電源出力Ｖ１と第２電源出力Ｖ２とを生成する電源回路７と、電源回路７の第１電源出力Ｖ１によって動作する制御部８と、電源回路７の第２電源出力Ｖ２によって動作する駆動機構７０と、電源回路７における第２電源出力Ｖ２をオフに切り替える電源スイッチ６６と、第２電源出力Ｖ２の異常時に電源回路７を保護する保護回路（第２出力保護回路５５）と、を備える。制御部８は、駆動機構７０の動作状態において電源スイッチ６６により第２電源出力Ｖ２がオフに切り替えられたとき、保護回路の誤動作を防止する。【選択図】図３
Bibliography:Application Number: JP20210143093