Fastening means for safety belts

Claim 1

Fastening means for a safety belt comprising a locking tongue adapted for being attached to one end of a safety belt, a locking case adapted for being attached to the other end of the safety belt, locking flap means displaceably supported by said case for selectively engaging said locking tongue to lock the same in said case and for releasing the locking tongue, spring means acting on said flap means for urging the flap means to a locking position in which the locking tongue is engaged by the flap means, expeller means movably mounted in said case for expelling the tongue from the case with said tongue released from the flap means, push button means acting on said flap means for displacing the flap means to a released position, in opposition to said spring means, in which the flap means is released from said tongue, said push button means including a cam means having a cam surface on which said flap means is engaged under the action of said spring means, said push button means being displaceable to cause said flap means to ride up on said cam surface and release the flap means from engagement with the tongue, said cam surface having an upper profile which has a sloping concave curve in a direction away from said push button, said cam surface having a lower portion provided with a slot in which said flap means is engaged in the locking position, said cam means having a lower planar portion which slidably rides on said locking case, said expeller means including projection means for passing beneath the raised flap means to support the flap means while the tongue is being expelled by the expeller means and to hold said flap means in a raised position when said fastening means is not engaged.