Gas-burned glue gun

A gas-burned glue gun comprising a gun body and a hollow handle connected to said gun body at one end, said handle comprising a fuel gas tank holding a fuel gas, and a gas valve connected to said fuel gas tank, said gun body comprising a heating unit and a melting unit on the inside, said heating unit comprising a nozzle tube connected to said gas valve, and an ignition mechanism, said ignition mechanism comprising an electronic igniter, a flame nozzle connected to one end of said nozzle tube remote from said gas valve, an ignition button mounted on said gun body, a wire electrode connected between said electronic igniter and said flame nozzle, a gas tube connected between said nozzle tube and said flame nozzle, said gas tube having an air port, a piston ring mounted on said gas tube and moved to close/open said air port, and a link coupled between said piston ring and said ignition button, said melting unit comprising a heat conductive glue stick tube adapted to hold a glue stick, a heat accumulating portion disposed adjacent to said flame nozzle and adjacent to said heat conductive glue stick tube, wherein said heat accumulating portion has an internally threaded coupling portion integrally formed at a front side opposite to said flame nozzle, and a bolt threaded into said internally threaded coupling portion, a guard provided between said heat accumulating portion and said flame nozzle, and a catalyzer mounted in said heat accumulating portion, wherein when said ignition button is pressed on, said electronic igniter is triggered to produce sparks in igniting discharged fuel gas from said flame nozzle, and a flame is produced to heat said catalyzer, causing said catalyzer to produce a heating effect;

• when said ignition button is released, said piston ring is moved with said link to close said air port of said gas tube, causing the flame to be extinguished.