Buckle device

A buckle device for latching to a tongue, comprising a base, a latch member supported on said base so as to be movable between an engaged position with said tongue and a non-engaged position with said tongue, a push button member for releasing the engagement between said tongue and said latch member when manually operated, and a lever member pivotally supported on said base and having a first portion adapted to be engaged by said push button member when the push button member is manually operated, a second portion adapted to engage said latch member so as to bring said latch member into said engaged position and to hold said latch member in such position, a third portion adapted to engage said latch member when said push button member is manually operated to bring said latch member from said engaged position into said non-engaged position, the latch member being held loosely between said second and third portions, and a spring portion for imparting a biasing force to the lever member in a direction in which said second portion is engaged with said latch member, said lever member being adapted, when said push button member is operated with said tongue and said latch member being engaged with each other, to receive a rotational force applied to said first portion and to transmit said rotational force to said latch member through said third portion to thereby bring said latch member from said engaged position into said non-engaged position.