so as to normally retain the locking arm in a locking position in which in the locking position the locking arm blocks up the ignition button from ignition in order to ignite the piezoelectric lighter a user 39 s thumb must operate the operation button for moving the locking arm to an unlocking position then the user is able to push the ignition button downwardly to ignite the piezoelectric lighter application_number US 20665802 A description referring to fig1 and 2 of the drawings a piezoelectric lighter incorporated with a safety arrangement 2 according to a preferred embodiment of the present invention is illustrated the piezoelectric lighter such as a standard piezoelectric lighter comprises a casing 10 receiving a liquefied storage 11 and an ignition cavity 12 provided therein a gas emitting nozzle 13 disposed in the casing 10 and communicating with the liquefied gas storage 11 for controlling a flow of gas a piezoelectric unit 14 disposed in the casing 10 for generating piezoelectricity and a safety arrangement 2 which comprises an ignition button 21 a locking member 22 for blocking up the ignition button 21 from being depressed downwardly and a resilient element 23 disposed in the ignition cavity 12 for applying an urging pressure against the locking member 22.