The embodiments disclosed herein relate generally to an unobtrusive and easily deployed cargo restraint device capable of restraining items placed onto a vehicle seat. More particularly, the present invention relates to a cargo restraint device that is configured to keep said cargo from slipping or falling off a vehicle's seat while maintaining accessibility to said cargo, and allowing for the full use of the vehicle seat for passengers without the need to remove the cargo restraint device.

The present invention provides a support device. The support device includes a strap, the active length of which is variable, the strap supporting the accessory against the bearing element. The device includes a rail extending between two ends along the strap, the rail is secured to the wall, and a sliding element which slides along the rail, the sliding element includes a passage into which the strap is to be inserted. The device includes an adjustment device for adjusting the active length of the strap. The strap can be extended, relative to the adjustment device, between a retracted configuration, in which the active length is at a minimum, and an extended configuration, in which the active length is at a maximum. The adjustment device includes an element for returning the strap to the retracted configuration thereof.