PROBLEM TO BE SOLVED: To provide a pretensioner which enables a length of a rod-like power transmission member to increase and thereby enables increase of a taking-up amount of a webbing, and to provide a retractor and a seat belt.SOLUTION: A pretensioner 3 includes: a ring gear 31 which is disposed so as to rotate a spool 2; and power transmission means 32 which transmits power to the ring gear 31 during an emergency. The power transmission means 32 includes: a rod-like power transmission member 32a which transmits the power to the ring gear 31 while plastically deforming; a pipe 32b which accommodates the power transmission member 32a; and a gas generator 32c disposed at an end part of the pipe 32b. The power transmission member 32a includes: a rod part which is formed thinner than an inner diameter of the pipe 32b; an annular recessed part formed at a rear end part of the rod part; and a seal member which fits in the recessed part and seals a gap between the pipe 32b and the rod part.

    【課題】ロッド状の動力伝達部材の長さを長くすることができ、ウェビングの巻き取り量を増やすことができる、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は、スプール2を回転可能に配置されたリングギア31と、緊急時にリングギア31に動力を伝達する動力伝達手段32と、を備え、動力伝達手段32は、塑性変形しながらリングギア31に動力を伝達するロッド状の動力伝達部材32aと、動力伝達部材32aを収容するパイプ32bと、パイプ32bの端部に配置されたガス発生器32cと、を有し、動力伝達部材32aは、パイプ32bの内径よりも細く形成されたロッド部と、ロッド部の後端部に形成された環状の凹部と、凹部に嵌合されパイプ32bとロッド部との隙間を封止するシール部材と、を有している。【選択図】図1


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    Title :

    PRETENSIONER, RETRACTOR, AND SEAT BELT DEVICE


    Additional title:

    プリテンショナ、リトラクタ及びシートベルト装置


    Contributors:

    Publication date :

    2015-12-07


    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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