| 摘要 |
A low friction self-locking adjust tongue having a pair of depressed lands provided in the tongue plate either side of the web aperture to form a lock bar well. Cutouts provided in the tongue plate's upstanding flanges form in conjunction with said depressed lands a bi-level lock bar slot extending rearwardly and upwardly from the lock-bar well to above the plane of the tongue plate. In the unlatched position of the tongue plate, the lock bar rests in the lock bar well permitting the seat belt webbing to pass thereover with negligable friction. In the locked position, the lock bar is displaced towards the rear of the bi-level lock bar slot which raises the lock bar above the plane of the tongue plate. In this position, the friction between the lock bar and the seat belt webbing is sufficient to lock the seat belt webbing in the tongue plate after it is snuggly adjusted about the occupants pelvic region. |
