A seatbelt height adjuster includes a track elongated along an axis and including a plurality of holes spaced from each other along the axis, a slider slideably coupled to the track, a D-ring supported by the slider, a pin supported by the slider and releasably engageable with one respective hole, and a pyrotechnic actuator supported by the slider and engaged with the pin.

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.

An assembly includes a track. The assembly includes a first plate slidably engaged with the track. The assembly includes a second plate spaced from the first plate and coupled to the first plate. The second plate is releasably lockable to the track. The assembly includes a webbing guide supported by the first plate. The assembly includes a seatbelt webbing extending through the webbing guide. The assembly includes a spring coupled between the first plate to the second plate.

Shock absorbing seat belt height adjusters for use with vehicle occupant restraint systems, and associated systems and methods. 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.

Shock absorbing seat belt height adjusters for use with vehicle occupant restraint systems, and associated systems and methods. In one embodiment, a shock absorbing height adjuster can be attached to a vehicle frame between an upper anchor point and a lower anchor point adjacent to an occupant's shoulder. The height adjuster can include a web clamp that locates a D-ring for positioning a shoulder web portion of the restraint web at a desired height that is comfortable for the occupant. Additionally, the height adjuster can include an anti-cinch feature that can elastically extend in response to tension loads in the shoulder web portion, thereby reducing shock loads from being transmitted to the seat occupant from the shoulder web portion.

A seatbelt height adjuster includes a track elongated along an axis and including a plurality of holes spaced from each other along the axis, a slider slideably coupled to the track, a D-ring supported by the slider, a pin supported by the slider and releasably engageable with one respective hole, and a pyrotechnic actuator supported by the slider and engaged with the pin.

An assembly includes a base defining a track and a hole. The assembly includes a plate slidably engaged with the track. The assembly includes a pin supported by the plate and movable between a first position engaged with the hole and a second position disengaged with the hole. The assembly includes an actuator designed to move the pin from the first position to the second position. The assembly includes a webbing guide supported by the plate.

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 can be attached to a vehicle frame between an upper anchor point and a lower anchor point adjacent to an occupant's shoulder. The height adjuster can include a web clamp that locates a D-ring for positioning a shoulder web portion of the restraint web at a desired height that is comfortable for the occupant. Additionally, the height adjuster can include an anti-cinch feature that can elastically extend in response to tension loads in the shoulder web portion, thereby reducing shock loads from being transmitted to the seat occupant from the shoulder web portion.

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.

An assembly includes a base defining a track and a hole. The assembly includes a plate slidably engaged with the track. The assembly includes a pin supported by the plate and movable between a first position engaged with the hole and a second position disengaged with the hole. The assembly includes an actuator designed to move the pin from the first position to the second position. The assembly includes a webbing guide supported by the plate.