Fastening means for safety belts

Claim 1

In a fastening device for safety belts attached to one part of a safety belt adapted for releasable engagement with a locking tongue having a connecting opening and attached to another part of a safety belt, the improvement for resisting high G-forces arising during a collision comprising: a one-piece locking case member having two spaced parallel plate portions each having inner and outer sides and forming an intermediate space between said inner sides for receiving said locking tongue therein; a first pair of holes through said parallel plate portions adjacent one end thereof for securing said fastening device to a vehicle; a second pair of holes through said parallel plate portions adjacent the other end thereof; a third pair of holes through said parallel plate portions between said first and second pairs of holes; two spaced sidewall portions on said case member each extending beyond the outer side of one of said plate portions and having pivot pin receiving recesses therein; a locking flap adjacent said outer side of one of said plate portions; a supporting lug extending from said locking flap and insertable into said third pair of holes in the locked position of the fastening device; two hinge arms on said locking flap engaged with for turning about said one end of said case member; a rivet member extending from said locking flap and insertable into in guided relationship with said second pair of holes and through the connecting opening in the locking tongue in the locked position; an expeller member for expelling said locking tongue from said case member slidingly movable in said intermediate space and having two spaced expeller legs engageable with the inserted end of said locking tongue in the locked position; an expeller cam on said expeller member between said expeller legs and having an inclined surface thereon; a blocking member having an angularly shaped cross-section formed by two leg portions joined at a joining region and extending at an angle with respect to each other; one of said leg portions being shaped for releasable blocking engagement with said locking flap in the locked position; the other of said leg portions having a crossbar as a part thereof; pivot pins extending oppositely from said joining region of said blocking member pivotally engaging in said pivot pin recesses for pivotally mounting said blocking member; securing lugs extending oppositely from said one of said leg portions; securing lugs extending oppositely from said expeller member; tension securing springs having ends connected respectively to said securing lugs for resiliently urging said expeller member toward the expelling position and for resiliently urging said blocking member toward the blocking position; an interior frame member for receiving said case member therein; guide means on said interior frame member for retaining and guiding said blocking flap in the mounted position; a push-button member movably mounted with respect to said interior frame and case member having lifting means thereon for separately enganging said locking flap and blocking member so that depressing said push button towards said interior frame moves said locking flap and blocking member against the force of said securing springs into tongue-release position so that said expelling member expels said tongue from said case member; and an outer casing.