To provide a pretensioner which enables improvement of inhibition effect of backward movement of a power transmission member, and to provide a retractor and a seat belt device.SOLUTION: A retractor 1 includes a pretensioner 3 which takes up webbing to remove looseness during an emergency. The pretensioner 3 includes: a ring gear 31 connected to a spool 2; and a power transmission device 32 which transmits power to the ring gear 31 during the emergency. The power transmission device 32 includes: a rod-like power transmission member 32a which transmits power to the ring gear 31 while plastically deforming; and a guide member 32f which supports the power transmission member 32a when the power transmission member 32a and the ring gear 31 start engaging. The guide member 32f includes a protruding part 32g formed on a contact surface which contacts with the power transmission member 32a.SELECTED DRAWING: Figure 1

    【課題】動力伝達部材の逆流の抑止効果を向上することができる、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】リトラクタ1は、緊急時に前記ウェビングを巻き取って弛みを除去するプリテンショナ3を含み、プリテンショナ3は、スプール2に接続されたリングギア31と、緊急時にリングギア31に動力を伝達する動力伝達装置32と、を含み、動力伝達装置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とリングギア31との噛合開始時に動力伝達部材32aを支持するガイド部材32fと、を含み、ガイド部材32fは、動力伝達部材32aとの接触面に形成された凸部32gを備えている。【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 :

    2019-12-19


    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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