To provide a pretensioner which can inhibit emission of a working gas to the outside even if a power transmission member is made of resin, and to provide a retractor and a seat belt device.SOLUTION: A power transmission device 32 includes: a rod-shaped power transmission member 32a which transmits power to a ring gear 31 and is made of resin; a cylindrical guide member 32b which guides the power transmission member 32a to the ring gear 31; a gas generator 32c which supplies a working gas to an interior of the guide member 32b; a metallic stopper ball 32d disposed between the gas generator 32c and the power transmission member 32a; a piston 32e disposed behind the stopper ball 32d; a cylindrical inner pipe 32f disposed at an outlet part of the power transmission member 32a of the guide member 32b; and a guide member 32g which supports the power transmission member 32a when the power transmission member 32a and the ring gear 31 starts engaging.SELECTED DRAWING: Figure 1
【課題】動力伝達部材が樹脂製の場合であっても作動ガスの外部放出を抑制することができる、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】動力伝達装置32は、リングギア31に動力を伝達する樹脂製のロッド形状の動力伝達部材32aと、動力伝達部材32aをリングギア31に案内する筒形状の案内部材32bと、案内部材32bの内部に作動ガスを供給するガス発生器32cと、ガス発生器32cと動力伝達部材32aとの間に配置された金属製のストッパボール32dと、ストッパボール32dの後方に配置されたピストン32eと、案内部材32bの動力伝達部材32aの出口部に配置された筒形状のインナーパイプ32f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32gと、を備えている。【選択図】図1
PRETENSIONER, RETRACTOR, AND SEAT BELT DEVICE
プリテンショナ、リトラクタ及びシートベルト装置
2020-07-09
Patent
Electronic Resource
Japanese
IPC: | B60R Fahrzeuge, Fahrzeugausstattung oder Fahrzeugteile, soweit nicht anderweitig vorgesehen , VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR |