Buckle for a safety belt for vehicles

Claim 1

In a buckle for a safety belt for vehicles, which comprises a tongue-shaped insertion part and a sleeve-shaped receiving part forming a primary locking means, which is provided for locking the insertion part when it is in an inserted position in the receiving part, and for permitting its release from such a locked condition, the primary locking means being in the form of an arm, which is pivotable around a shaft which is parallel to the plane of the insertion part and perpendicularly arranged relative to the direction of movement of the insertion part in the receiving housing, the primary locking means being provided with at least one engaging pin serving the purpose in a first pivoting locking position to cooperate with a pin on the insertion part and lock the same to the receiving part, and in a second pivoting position to release the insertion part, the primary locking means being spring loaded in the releasing direction and provided with a stop dog which is in cooperation with a secondary locking means displaceable along the stop dog, arranged to impede the primary locking means from pivoting in the release direction into a displacing and locking position of the secondary locking means, whereas the secondary locking means permits pivoting of the primary locking means into a second release position of displacement of the secondary locking means, the release of said primary and secondary locking means being actuated by a manually operated device, which is displaced in the direction of insertion of the insertion part, the improvement wherein the primary locking means comprises a double armed lever pivotable and extending on both sides of said shaft, one arm of said lever, which is directed outwardly toward the opening of insertion supporting said stop dog, which cooperates with the insertion part, and the inwardly directed arm of said lever supporting said stop dog cooperating with the secondary locking means, said last mentioned stop dog being formed by a surface which is faced in the same direction as the direction in which the projection supporting the stop dog cooperating with the insertion part is projected, said secondary locking means comprising a pin spring loaded from the inner portion of the insertion part, said pin being substantially parallel to the shaft of the primary locking means and against bias of said spring actuation by force displaceable past said stop dog cooperating with the same by means of an operating device, which is spring loaded in the same direction, the inner ends of the springs being supported by a common yoke located in the interior portion of the receiving part.