A seatbelt device comprises a webbing, a bag body and an anchor member. The webbing is applied to the body of a vehicle occupant sitting on a seat. The bag body is provided along a length direction of the webbing, and the bag body is disposed at one side of the webbing and can be inflated by pressure of a fluid supplied from a length direction one side of the bag body. A deployment portion through which the fluid can pass is provided in the bag body, being disposed at width direction outer sides and a thickness direction another side of the webbing. An insertion hole is formed in the anchor member, through which the webbing and the bag body are inserted. The webbing is folded at the thickness direction one side when applied to the body of the sitting vehicle occupant, and the deployment portion of the bag body is disposed in the insertion hole.

A restraining device of a seat unit protecting a person without relying on a supporting surface. The first part extends from its first end in a first direction over the shoulder of a person sitting in the vehicle seat to a backrest-distal second end being located in front of the person's head and/or torso, and in a second direction from a person-outer third end to a person-inner fourth end. The second part extends in a third direction from a fifth end to a sixth end and from a backrest-proximate seventh end to a backrest-distal eighth end, such that a least an upper section of the second part extends laterally of the person's head. The third part extends in the second direction from a person-outer ninth end to a person-inner tenth end, such that at least an upper section of the third part faces the person's face.

The occupant restraint device for a vehicle includes a seatbelt, which restrains an occupant P sitting on a vehicle seat at the vehicle seat, and a belt backing airbag. When gas is supplied to the belt backing airbag from an inflator at a time of frontal collision of the vehicle, the belt backing airbag inflates and expands between at least the shoulder belt of the seatbelt and the shoulder area of the occupant. Together with moving to a vehicle front side to follow the occupant moving to the vehicle front side due to inertial force, the belt backing airbag moves along the shoulder belt and maintains the state in which the belt backing airbag is interposed between at least the shoulder area of the occupant and the shoulder belt.

A restraining device of a seat unit protecting a person without relying on a supporting surface. The first part extends from its first end in a first direction over the shoulder of a person sitting in the vehicle seat to a backrest-distal second end being located in front of the person's head and/or torso, and in a second direction from a person-outer third end to a person-inner fourth end. The second part extends in a third direction from a fifth end to a sixth end and from a backrest-proximate seventh end to a backrest-distal eighth end, such that a least an upper section of the second part extends laterally of the person's head. The third part extends in the second direction from a person-outer ninth end to a person-inner tenth end, such that at least an upper section of the third part faces the person's face.

The occupant restraint device for a vehicle includes a seatbelt, which restrains an occupant P sitting on a vehicle seat at the vehicle seat, and a belt backing airbag. When gas is supplied to the belt backing airbag from an inflator at a time of frontal collision of the vehicle, the belt backing airbag inflates and expands between at least the shoulder belt of the seatbelt and the shoulder area of the occupant. Together with moving to a vehicle front side to follow the occupant moving to the vehicle front side due to inertial force, the belt backing airbag moves along the shoulder belt and maintains the state in which the belt backing airbag is interposed between at least the shoulder area of the occupant and the shoulder belt.