Safety device for ignition gun

A safety device for ignition gun, comprising:

• a housing of an ignition gun;
• a knob disposed on the housing, being slidable relatively to the latter;
• a push button combined with a base, in which the base is assembled in the housing and is also slidable relatively to the latter;
• a projecting portion is formed at one end of the base;
• and a spring is arranged between the base and the housing structure such that the projecting portion would confront against a bottom edge of the knob by taking advantage of the elastic force of the spring applied to the base under normal conditions to make the knob non-depressible;
• and
• a reed piece fixedly disposed in the housing, having a barb;
• whereby an end face of the projecting portion is checked by the barb of the reed piece if one pushes the push button to a proper position to release the projecting portion from the bondage of the knob such that the knob would become free for depression;
• and during a depression travel of the knob, the reed piece is depressed to let go of the barb from the checking of the projecting portion to restore the push button to its original position by the restoring force of the spring applied upon the base.