Abstract: A seat belt restraint system locking tongue (10) having a locking member (30) which moves to a locked position to clamp a webbing (3) inserted in a shoulder-side webbing insertion slot (12) to restrict movement of the webbing (3). A tongue body (11) includes a restricting portion (25) near the shoulder-side webbing insertion slot (12) to clamp the webbing (3) with the locking member (30) when the locking member (3) moves to the locked position. The length in the longitudinal direction of the webbing insertion slot (12), of a portion of the restricting portion (25) that contacts the webbing (3) to clamp the webbing (3) is smaller than the width of the webbing (3). The locking tongue prevents fraying of the webbing (3) and improves the clamping performance in the event of a vehicle crash.

Abstract: A seat belt restraint system locking tongue (10) having a locking member (30) which moves to a locked position to clamp a webbing (3) inserted in a shoulder-side webbing insertion slot (12) to restrict movement of the webbing (3). A tongue body (11) includes a restricting portion (25) near the shoulder-side webbing insertion slot (12) to clamp the webbing (3) with the locking member (30) when the locking member (3) moves to the locked position. The length in the longitudinal direction of the webbing insertion slot (12), of a portion of the restricting portion (25) that contacts the webbing (3) to clamp the webbing (3) is smaller than the width of the webbing (3). The locking tongue prevents fraying of the webbing (3) and improves the clamping performance in the event of a vehicle crash.