PROBLEM TO BE SOLVED: To provide a disconnection detection device capable of improving anti-theft performance of a horn device body.SOLUTION: A disconnection detection device comprises two horns, a horn switch turned on and off in response to operation of a horn button, a plug-in relay arranged in a relay box and supplying driving power to the two horns by turning on a contact point circuit in response to ON of the horn switch and a wire harness for electrically connecting the plug-in relay and the two horns, and comprises a disconnection detection unit having a constant current circuit for supplying a disconnection detecting constant current to the respective two horns via the wire harness and a disconnection detection circuit for supplying the driving power to the wire harness by turning on the contact point circuit independently of the horn switch when detecting disconnection of the wire harness by determining the existence of the disconnection of the wire harness by monitoring output voltage of the constant current circuit, and the disconnection detection unit is arranged in the relay box together with the plug-in relay.

    【課題】ホーン装置本体の盗難防止性能を向上させることが可能な断線検知装置を提供する。【解決手段】2つのホーンと、ホーンボタンの操作に対応してON/OFFされるホーンスイッチと、リレーボックス内に配置され、ホーンスイッチのONに対応して接点回路をONさせ2つのホーンへ駆動電力を供給するプラグインリレーと、プラグインリレーと2つのホーンとを電気的に接続するワイヤーハーネスとを備える断線検知装置であって、ワイヤーハーネスを介して2つのホーンのそれぞれに断線検知用の定電流を供給する定電流回路と、定電流回路の出力電圧を監視してワイヤーハーネスの断線の有無を判定し、ワイヤーハーネスの断線を検知した場合に、ホーンスイッチとは独立して接点回路をONし、ワイヤーハーネスに駆動電力を供給させる断線検知回路とを備える断線検知ユニットを有し、断線検知ユニットは、プラグインリレーと共にリレーボックス内に配置される。【選択図】図1


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    Title :

    DISCONNECTION DETECTION DEVICE


    Additional title:

    断線検知装置


    Contributors:

    Publication date :

    2015-07-27


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    B60R Fahrzeuge, Fahrzeugausstattung oder Fahrzeugteile, soweit nicht anderweitig vorgesehen , VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR / G08B SIGNALLING OR CALLING SYSTEMS , Signalisier- oder Rufsysteme



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