Patent ID: 6457628
Filing Date: 2002-10-01
Classification: B23K

Abstract:
A safety switch device for a gas jet soldering gun comprising:a housing (20), having a rear end defining an opening (21), said opening (21 ) having an inner side provided with a catch flange (22), said catch flange (22) having an inner side wall face defining an L-shaped drive slot (26) including a longitudinal slot (261) and a transverse slot (262) communicating with each other, said housing (20) having a positioning seat (23) mounted in a predetermined position thereof, a catch block (24) mounted in said housing (20) and located between said opening (21) and said positioning seat (23), a hook seat (25) provided in said catch block (24); an igniter (30), positioned on said positioning seat (23) of said housing (20), and including a drive lever (31) protruding outward from said opening (21) of said housing (20), said drive lever (31) being pressed to form an electronic ignition action; a spring (40), fitted outside of said igniter (30), and having a first end provided with a first locking hook (41) and a second end provided with a second locking hook (42), said first locking hook (41) located toward one side of said igniter (30) and positioned in said hook seat (25) of said catch block (24) of said housing (20); and a cap-shaped ignition push button (50), having an inner edge rested on said drive lever (31) of said igniter (30) and said spring (40), and having a lower edge provided with a protruding annular flange (51) mating with said catch flange (22) of said opening (21) of said housing (20), said protruding annular flange (51) slidably mounted in said housing (20), and having an outer periphery provided with a locking drive block (52), said locking drive block (52) being slidable to be inserted into said L-shaped drive slot (26) of said housing (20), an insertion hook (53) provided in said ignition push button (50) for securing said second locking hook (42) of said spring (40), whereby said spring (40) stores a compression stress and a torsion stress, so that said ignition push button (50) can in turn be returned to and locked in said transverse slot (262) of said L-shaped drive slot (26) of said housing (20).