Lock tongue for safety belts

A lock tongue for a safety belt system, comprising two passage openings for accommodating a belt strap of the safety belt system, a central web means for separating the two passage openings, and clamping means adapted to be attached in one of the passage openings for clamping the belt strap, the clamping means extending along an entire longitudinal extension of the passage opening so as to rest on both sides in marginal zones of the lock tongue adjoining narrow sides of the passage opening so that the clamping means supports the belt strap extended therearound when the clamping means is in the passage opening, the belt strap passes through the passage openings so that the lock tongue is firmly attachable in a certain location of the belt strap due to a loop around friction occurring under load, the attachment of the lock tongue is effected by repeated deflection of the belt strap by the clamping means, the clamping means includes a clamping bracket having a base portion and a head portion, the head portion has a width wider than a width of the base portion such that the bracket has an approximately mushroom-shaped cross section, the base portion is adapted to be inserted into the passage opening, the width of the base portion is less than the length of the narrow sides of the passage opening by about three times a thickness of the belt strap, a width of the head portion corresponds approximately to the length of the narrow sides of the passage opening, and means are provided for attaching the clamping bracket to the lock tongue.