PROBLEM TO BE SOLVED: To adjust tension of a seat belt with high accuracy.SOLUTION: A seat belt take-up device includes: a spool which takes up a seat belt; a spiral spring which has one end connected to a rotary shaft of the spool and energizes the spool in a take-up direction of the seat belt; a spring case which is rotatably provided around the rotary shaft and stores the spiral spring and to which the other end of the spiral spring is connected; a motor which rotates the spring case; and a control section which drives the motor and rotates the spring case until a difference between rotation amount of the spool and rotation amount of the spring case or an amount of change changing according to the difference becomes a target value which decreases energizing force of the spiral spring while the storage state of the seat belt remains held.SELECTED DRAWING: Figure 7

    【課題】シートベルトの張力を高精度に調整すること。【解決手段】シートベルトを巻き取るスプールと、前記スプールの回転軸に一端が接続され、前記スプールを前記シートベルトの巻き取り方向に付勢するスパイラルスプリングと、前記回転軸の周りに回転可能に設けられ、前記スパイラルスプリングを収容するとともに前記スパイラルスプリングの他端が接続されたスプリングケースと、前記スプリングケースを回転させるモータと、前記シートベルトの格納状態が保持されたまま、前記スプールの回転量と前記スプリングケースの回転量との差又は前記差に応じて変化する変化量が、前記スパイラルスプリングの付勢力が弱まる目標値になるまで、前記モータを駆動して前記スプリングケースを回転させる制御部とを備える、シートベルト巻き取り装置。【選択図】図7


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    Title :

    SEAT BELT TAKE-UP DEVICE


    Additional title:

    シートベルト巻き取り装置


    Contributors:

    Publication date :

    2018-03-22


    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



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