Abstract: A latching mechanism for an instrument delivery system having a base, a slide tray, movable relative to the base between an opened position and a closed position, wherein the latching mechanism comprises: an actuating unit, including a push button mounted on the slide tray, for moving a member from a first position to a second position in response to movement of the push button from an extended position to a depressed position; and a latching unit for latching the slide tray in at least one of the opened position and the closed position when the member is in the first position and for unlocking the slide tray when the member is in the second position.