Vehicle seats

An air-bag unit for a vehicle seat having a squab and a back-rest, the back-rest including a frame covered with upholstery, the air-bag unit comprising:

• an inflatable air-bag connected to an inflator to inflate the air-bag upon deployment of the air-bag unit;
• the air-bag unit being mounted to the back-rest frame so as to be located inboard of part of the frame with the inflator being positioned to direct gas into the air-bag in a generally forward direction relative to the back-rest, such that the deployment of the air-bag unit will cause the air-bag to inflate so that at least part of the air-bag lies between the frame and an occupant of the vehicle seat, the air-bag unit mounted such that the inflator is located adjacent a rear-most region of the frame so that a significant length of the air-bag bears against the frame as the air-bag is inflated upon the deployment, wherein the air-bag unit comprises an inner air-bag and an outer air-bag, the inner air-bag being provided inside the outer air-bag, and both the inner and outer airbags being connected to the inflator so that the inner and outer air-bags are both inflated together upon the deployment of the air-bag unit, and wherein the inner and outer air-bags are initially provided in a packed condition in which the inner bag and at least part of the outer bag are spirally rolled together about a major axis of the back-rest extending away from the squab.

An air-bag unit for a vehicle seat having a squab and a back-rest, the back-rest including a frame covered with upholstery, the air-bag unit comprising:

• an inflatable air-bag connected to an inflator to inflate the air-bag upon deployment of the air-bag unit;
• the air-bag unit being mounted to the back-rest frame so as to be located inboard of part of the frame with the inflator being positioned to direct gas into the air-bag in a generally forward direction relative to the back-rest, such that the deployment of the air-bag unit will cause the air-bag to inflate so that at least part of the air-bag lies between the frame and an occupant of the vehicle seat, the air-bag unit mounted such that the inflator is located adjacent a rear-most region of the frame so that a significant length of the air-bag bears against the frame as the air-bag is inflated upon the deployment, wherein the air-bag unit comprises an inner air-bag and an outer air-bag, the inner air-bag being provided inside the outer air-bag, and both the inner and outer airbags being connected to the inflator so that the inner and outer air-bags are both inflated together upon the deployment of the air-bag unit, wherein the inner and outer air-bags are initially provided in a packed condition in which the inner bag and at least part of the outer bag are folded together in a substantially zigzag manner about fold lines lying substantially parallel to a major axis of the back-rest extending away from the squab, and wherein part of the outer air-bag extending past the forwardmost extent of the inner air-bag is initially spirally rolled about an axis substantially parallel to the axis of the back-rest extending away from the squab.