Electric ignition type handy gas torch

A gas torch comprising a cylindrical gas container, a barrel having a hollow projecting block, a gas tube disposed inside said barrel, a rotary gas-control knob connected between said gas container and said barrel and controlled to release fuel gas from said gas container into said gas tube, a welding tip, a cylindrical casing connected between said barrel and said welding tip remote from said gas container and having elongated air vents, a gas outlet tube disposed inside said casing and connected to said gas tube and having a radial hole, an electronic ignition switch mounted within said hollow projecting block of said barrel and controlled to ignite fuel gas from said gas outlet tube for heating said welding tip, a cap mounted on said electronic ignition switch and arranged to be moved to switch on and off said electronic ignition switch and having a bottom coupling portion connected to said gas outlet tube, and a sliding sleeve mounted around said gas outlet tube and having a radial hole communicated with said air vents on said casing and arranged to be moved by said bottom coupling portion of said cap relative to the radial hole on said gas outlet tube, wherein when said cap is moved forward to switch on said electronic switch, said sliding sleeve is moved forward by said bottom coupling portion of said cap to align the radial hole on said sliding sleeve with the radial hole on said gas outlet tube, permitting fuel gas to be mixed with air for burning within said casing to heat said welding tip.