Abstract: A numeral lighter includes an inner lighter housing having a liquefied gas storage and a top supporting frame and a numeral outer casing having a receiving cavity and a top opening communicating with the receiving cavity, wherein the inner lighter housing is detachably received in the receiving cavity of the numeral outer casing at a position that the liquefied gas storage is protectively enclosed within the numeral outer casing while the top supporting frame is positioned at the top opening of the numeral outer casing such that the numeral outer casing forms as an interchangeable shell to accommodate the inner lighter housing therein so as to enhance an aesthetic appearance of the lighter.

Abstract: A piezoelectric lighter includes a lighter casing, an ignition nozzle, a gas releasing valve, a piezoelectric unit, and a hidden push button arrangement. The hidden push button arrangement includes a push button which has a pusher end portion, a pivot end portion pivotally mounted at the lighter casing at the button receiving slot thereof, and a button surface extended from the pusher end portion and the pivot end portion, adapted to pivotally fold between an operation position and a hidden position. At the hidden position, the pusher end portion of the push button is folded into the button receiving slot to align the button surface of the push button with the outer surface of the lighter casing so as to completely hide the push button in the button receiving slot within the lighter casing.