Vehicle occupant restraint device

1 . A vehicle occupant restraint device comprising:

a seat belt configured to restrain an occupant seated on a seat cushion of a vehicle seat to the vehicle seat;

a belt support airbag provided in a folded state in a lap belt or a shoulder belt of the seat belt and configured to be inflated and deployed by gas supplied in an event of a frontal collision of a vehicle; and

a belt covering member configured to cover at least a predetermined region of the lap belt on a belt anchor side and to urge the lap belt downward when the seat belt is released,

wherein the belt covering member is a resin plate having a substantially “C”-shaped cross section and extending along the seat belt;

wherein the belt covering member includes a lower half portion on the belt anchor side and an upper half portion on a side opposite to the belt anchor side; and

wherein the lower half portion and the upper half portion are rotatably connected by a support shaft.

2 . The vehicle occupant restraint device according to claim 1 , wherein the belt covering member is easily bent inward in a vehicle width direction and is difficult to be bent outward in the vehicle width direction.

3 . The vehicle occupant restraint device according to claim 1 , wherein the belt covering member is configured to urge the lap belt downward by a shaft portion spring member provided on a shaft portion of a belt anchor for the seat belt.

4 . The vehicle occupant restraint device according to claim 1 , wherein the upper half portion is urged to rotate toward the lower half portion by a support shaft spring member provided on the support shaft.

5 . The vehicle occupant restraint device according to claim 1 , wherein the vehicle seat includes a fixed armrest.