Push-button lock system

A lock system for a container with a closure that is movable between open and closed positions, said lock system comprising:

• a first pair of latch members, one latch member comprising a tang which is rigidly mounted on the closure and the other comprising a bracket which is pivotally mounted on the container, has a cross-member and is biased such that the cross-member and tang interlockingly engage when the closure is closed, thereby preventing movement of the closure from the closed to the open position;
• a first push-button lock mechanism mounted in a wall of the container and having a longitudinally slideable portion with an inner end that extends inside the container and an outer key-insertion end that is biased to the outside of the container and forms a push-button, said slideable portion being rotatable between locked and unlocked positions;
• and
• a first shoulder mechanism coupled to the inner end of the slideable portion;
• wherein the pivotally mounted bracket has a slot therethrough which is longitudinally aligned with the shoulder mechanism, the slot and shoulder mechanism being configured such that the shoulder mechanism, upon depression of the push-button, passes through the slot without impinging on the bracket when the slideable portion of the lock mechanism is in its locked position, but does not fit through the slot and thereby impinges on the bracket, counteracts the bias thereon and disengages the first pair of latch members when the slideable portion of the lock mechanism is in its unlocked position, whereby movement of the closure to the open position is possible.