| 摘要 |
A locking device in safety belts for a tongue comprises a locking member (10) adapted to be rotated around an axis (b) between a release position and a locking position. The locking device also comprises a latch member (29) for the locking member and a movable operating member (30) to release the tongue. The locking member (10) has a contact surface for the tongue (19), the perpendicular (N) of which in the locking position of the locking member passes through a torque axis (A) which is parallel with the axis of rotation (B) of the locking member and which is so positioned that a force on the tongue (19) in the direction (U) of withdrawal of the tongue causes a resultant torque (M) on the locking member towards the release position of the locking member, so that it is easier to release the tongue when the safety belt is loaded. The axis of rotation (B) of the locking member is positioned outside the contact surface of the locking member, as seen in the direction (U) of withdrawal of the tongue. The locking member may be mounted on a resilient lug (27) yielding when the safety belt is very heavily loaded, as for example in a collision, so that the locking member then is self-locking. |
