Safety belt buckle

Claim 1

A safety belt buckle of the kind comprising a coupling member connected to one part of the safety belt assembly and provided with a spring loaded locking member and a tongue connected to another part of the belt, said tongue being insertable into said coupling member and adapted upon insertion to raise the locking member against the action of a spring until the locking member snaps into its locking position and retains the tongue, manually operable means being provided for raising said locking member in order to release said tongue, characterized in that the tongue (25) has a front edge portion which is inclined in the plane of the tongue relative to the direction of insertion, the locking member (15) being displaceable between its locking position and its releasing position in a direction which forms a considerable angle to the plane of the tongue and is provided with guide edges which upon insertion of the tongue will slide against said tongue front edge, said guide edges being inclined in such a direction that upon insertion of the tongue the locking member will be displaced against the action of the spring towards its releasing position, the tongue being provided with an abutment behind which the locking member will fall down at the end of the insertion movement.