To provide a pretensioner which can perform easy adjustment of gas pressure.SOLUTION: A pretensioner 1 includes: a wire 2 in which one end part is connected to webbing 101 for restraining an occupant of a vehicle; a piston 3 connected to the other end part of the wire 2; a cylinder 4 which slidably houses the piston 3; a housing 6 through which the wire 2 penetrates and which holds the cylinder 4; and a gas generator 5 which supplies gas for causing the piston 3 to operate in a direction such that the piston 3 pulls in the wire 2 to the piston 3 through a gas chamber C in the housing 6. The piston 3 has a cylindrical part 36 extending in an axial direction of the piston 3 at one end part on the gas chamber C side and adjusts an initial volumetric capacity of the gas chamber C by adjusting a volumetric capacity of an internal space 38 of the cylindrical part 36.SELECTED DRAWING: Figure 4

    【課題】ガス圧の調整を簡易に行うことができるプリテンショナを提供する。【解決手段】プリテンショナ1は、車両の乗員を拘束するウェビング101に一端部が接続されるワイヤ2と、ワイヤ2の他端部に接続されるピストン3と、ピストン3を摺動可能に収容するシリンダ4と、ワイヤ2を貫通させると共にシリンダ4を保持するハウジング6と、ワイヤ2を引き込む方向にピストン3を作動させるためのガスをハウジング6内のガス室Cを通じてピストン3に供給するガス発生器5と、を備える。ピストン3は、ガス室C側の一方の端部にピストン3の軸方向に延びる円筒部36を有し、円筒部36の内部空間38の容積を調整することによりガス室Cの初期容積を調整する。【選択図】図4


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    Title :

    PRETENSIONER AND SEAT BELT DEVICE


    Additional title:

    プリテンショナ及びシートベルト装置


    Contributors:

    Publication date :

    2019-04-04


    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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