To provide a pretensioner, a retractor, and a seat belt device, which can relax constraint conditions for designing the pretensioner while suppressing discharge of operation gas.SOLUTION: A power transmission device 32 of a pretensioner 3 includes: a piston 32d which is arranged between a gas generator 32c and a power transmission member 32a; and a restraining section 32g which restrains the piston 32d formed in a guide member 32b. The piston 32d has through holes (first through hole 32r and second through hole 32s) communicating front and back spaces with each other and guide flow passages (first groove 321c and second groove 321d) for guiding operation gas to the through holes. The guide flow passages have at least a bent section (first bent section 321e and second bent section 321f).SELECTED DRAWING: Figure 2

    【課題】作動ガスの放出を抑制しつつプリテンショナの設計に対する制約条件を緩和することができる、プリテンショナ、リトラクタ及びシートベルト装置を提供する。【解決手段】プリテンショナ3の動力伝達装置32は、ガス発生器32cと動力伝達部材32aとの間に配置されたピストン32dと、案内部材32bに形成されピストン32dを拘束する拘束部32gと、を含む。ピストン32dは、前後の空間を連通する貫通孔(第一貫通孔32r及び第二貫通孔32s)と、貫通孔に作動ガスを案内する案内流路(第一溝321c及び第二溝321d)と、を備える。案内流路は、少なくとも一つの屈曲部(第一屈曲部321e及び第二屈曲部321f)を備えている。【選択図】図2


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    Titel :

    PRETENSIONER, RETRACTOR, AND SEAT BELT DEVICE


    Weitere Titelangaben:

    プリテンショナ、リトラクタ及びシートベルト装置


    Beteiligte:
    WATANABE KIYOSHI (Autor:in) / ASAKO TADAYUKI (Autor:in) / TANAKA KOJI (Autor:in)

    Erscheinungsdatum :

    2022-12-14


    Medientyp :

    Patent


    Format :

    Elektronische Ressource


    Sprache :

    Japanisch


    Klassifikation :

    IPC:    B60R Fahrzeuge, Fahrzeugausstattung oder Fahrzeugteile, soweit nicht anderweitig vorgesehen , VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR



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