An assembly includes a vehicle roof and a vehicle floor spaced from the vehicle roof. The assembly includes a seatbelt assembly for accommodating a wheelchair. The seatbelt assembly is slidably supported by the vehicle roof and the vehicle floor. The seatbelt assembly is slidable along the vehicle roof and the vehicle floor along a vehicle-longitudinal axis. The seatbelt assembly has a seatbelt webbing elongated in a direction from the vehicle roof to the vehicle floor. The assembly includes a seatbelt buckle slidably supported by the vehicle floor. The seatbelt buckle is slidable relative to the vehicle floor along the vehicle-longitudinal axis.

Shock absorbing seat belt height adjusters for use with vehicle occupant restraint systems, and associated systems and methods are disclosed herein. In one embodiment, a shock absorbing height adjuster includes an adjustable D-ring that is operably coupled to an anchor point on a vehicle frame near a seat occupant's shoulder. The height adjuster can include an anti-cinch feature that enables the D-ring to elastically respond to tension loads in a shoulder web portion of the occupant restraint through at least an initial portion of D-ring movement.

A height adjustment device for a belt deflector having a guide rail (10) which has a C-shaped cross section with a base (11) and two side limbs (13) which project in the same direction from the base (11), a carriage (20) which is guided in the guide rail (10) such that it can be displaced and fixed, and a return spring (70) which is fastened to the carriage (20) and is guided within the guide rail (10). At least one of the side limbs (13) having at least one spacer element (15) for spacing the return spring (70) away from the side limb (13).

An assembly includes a vehicle roof and a vehicle floor spaced from the vehicle roof. The assembly includes a seatbelt assembly for accommodating a wheelchair. The seatbelt assembly is slidably supported by the vehicle roof and the vehicle floor. The seatbelt assembly is slidable along the vehicle roof and the vehicle floor along a vehicle-longitudinal axis. The seatbelt assembly has a seatbelt webbing elongated in a direction from the vehicle roof to the vehicle floor. The assembly includes a seatbelt buckle slidably supported by the vehicle floor. The seatbelt buckle is slidable relative to the vehicle floor along the vehicle-longitudinal axis.

A height adjuster for a vehicle seatbelt comprises: a rail having windows, each of the windows corresponding to a different height adjustment of the height adjuster for the vehicle seatbelt; a slider; a first pin slidingly mounted to the slider, the first pin being moveable in a second direction between (i) an extended position in which the first pin engages with one of the windows and the slider is restricted, and (ii) a retracted position where the first pin does not engage with any of the windows and the slider is not restricted; an actuator for moving the first pin to the retracted position; and a member coupled to the actuator and abutting the first pin in the extended position to restrict the first pin from moving in the second direction, the actuator configured to move the member upon actuation to allow the first pin to assume the retracted position.

A seat belt buckle presenter assembly (10) has a guide track (40) and a buckle presenter assembly (20). The guide track (40) is anchored to a vehicle seat frame at a first end and a second end. The buckle presenter assembly (10) is secured to and mounted onto the guide track (40) and is movable along the guide track (40) from a stowed position at the first end to an extended position toward the second end. Preferably, the guide track (40) is inclined having the first end of the guide track (40) fixed lower than the second end.

A seat belt adjustment release mechanism includes a carrier and a guide piece that is vertically slidable on the carrier. The guide piece includes an aperture configured to receive a seat belt there through and a spring-loaded button anchored on a pivot. The spring-loaded button, when pressed, is rotatable about the pivot between a home position and a depressed position for actuating a seat belt guide release lever.

Shock absorbing seatbelt height adjusters for use with vehicle occupant restraint systems, and associated systems and methods are disclosed herein. In one embodiment, a shock absorbing height adjuster includes a D-loop assembly slidably coupled to a rail, and a stop assembly and a pre-loader slidably coupled to the rail on opposite sides of the D-loop assembly. The stop assembly and the pre-loader can be releasably lockable at a plurality of positions along the rail. A biasing member can be compressed between the pre-loader and the D-loop assembly to urge the D-loop assembly toward the stop assembly and allow motion of the D-loop assembly toward the pre-loader under load. The position of the pre-loader can be adjusted to vary the compression in the biasing member.

A height adjuster of a seat belt for a vehicle may include a rail bracket configured to be fixedly mounted on a vehicle body so that rail grooves are formed to be continuously connected and the rail grooves are vertically disposed on the rail bracket, a slider configured to be coupled to the rail bracket and moving along a length direction of the rail bracket and having left and right surfaces provided with guide grooves so as to be fitted in edge portions of the rail bracket which are provided with the rail grooves, and a locking mechanism configured to be coupled to the slider so as to elastically slidably move and restrict a movement of the slider at a time of contacting the rail groove and release the restriction of the movement of the slider at a time of being separated from the rail groove.

A height adjuster for a vehicle seatbelt comprises: a rail having windows, each of the windows corresponding to a different height adjustment of the height adjuster for the vehicle seatbelt; a slider; a first pin slidingly mounted to the slider, the first pin being moveable in a second direction between (i) an extended position in which the first pin engages with one of the windows and the slider is restricted, and (ii) a retracted position where the first pin does not engage with any of the windows and the slider is not restricted; an actuator for moving the first pin to the retracted position; and a member coupled to the actuator and abutting the first pin in the extended position to restrict the first pin from moving in the second direction, the actuator configured to move the member upon actuation to allow the first pin to assume the retracted position.