Abstract: A frame for a vehicle seat is provided, in particular for a vehicle seat for people with a disability. The frame is made of aluminum or an aluminum alloy. A substructure for receiving the frame is also provided, in particular for reversibly releasably coupling to a vehicle structure, with the substructure being made at least partially or completely of aluminum or an aluminum alloy.

Abstract: A retractor restraint system is provided for securing wheelchairs and/or people in vehicles. The system includes a housing, a retractor reel mounted to the housing rotatably in a positive and a negative direction of rotation for receiving a belt which can be coupled to a wheelchair, an arresting unit for arresting the reel to prevent rotation in the negative direction of rotation in an operating state of the retractor restraint system, a clamping unit arranged at the housing for releasably clamping fast the belt unwound from the reel, and a triggering mechanism for actuation of the clamping unit. The triggering mechanism is coupled to the arresting unit and the reel in such a way that the clamping unit is actuated when a torque acts on the reel in the negative direction of rotation and the reel is arrested by the arresting unit.