Child-resistant gas lighter

Abstract

A lighter that includes a hard-spring piezoelectric unit for preventing children from to operate lighter. A piezoelectric ignition unit has a plunger that is movable into a main casing to generate sparks for igniting a stream of flammable fuel. A hard-spring piezoelectric unit includes a plunger which includes auxiliary spring surrounding the plunger for increasing a force needed to actuate the piezoelectric unit and a blocking means for fixing the auxiliary spring with respect to the piezoelectric unit therefore enhancing an assembly efficiency of the gas lighter in manufacturing.

1 . A lighter comprising:
 a fuel-storage chamber for containing flammable fuel,   a piezoelectric unit mounted on said fuel-storage chamber, having a main casing, a plunger which is movable into said main casing when pressed downward, is able to actuate said piezoelectric unit to generate sparks for ignition, an auxiliary spring surrounding said plunger, and a blocking means fixed to a top end of said plunger,   an ignition trigger, when depressed, is able to release said flammable fuel and at the same time depress said plunger of said piezoelectric unit to generate sparks.   
   
   
       2 . The lighter as claimed in  claim 1 , wherein said blocking means has a shank inserted in a hole defined in said top end of said plunger and a cap a diameter of which is at lest larger than an inner diameter of said auxiliary spring. 
   
   
       3 . The lighter as claimed in  claim 2 , wherein a plurality of flanges are formed on said blocking means around said shank. 
   
   
       4 . The lighter as claimed in  claim 1 , wherein said blocking means is an elastic ring covering on a pillar formed on said top end of said piezoelectric button. 
   
   
       5 . The lighter as claimed in  claim 1 , wherein said blocking means is made of plastic. 
   
   
       6 . The lighter as claimed in  claim 1 , wherein said blocking means is made of metal. 
   
   
       7 . The lighter as claimed in  claim 3 , wherein said pillar has a head. 
   
   
       8 . The lighter as claimed in  claim 4 , wherein said head has a tapering top surface. 
   
   
       9 . A lighter comprising:
 a fuel-storage chamber for containing flammable fuel,   a piezoelectric unit mounted on said fuel-storage chamber, having a main casing, a plunger which is movable into said main casing when pressed downward, is able to actuate said piezoelectric unit to generate sparks for ignition, an auxiliary spring located inside of said main casing,   an ignition trigger, when depressed, is able to release said flammable fuel and at the same time depress said plunger of said piezoelectric unit to generate sparks.   
   
   
       10 . A lighter comprising:
 a housing,   a fuel-storage chamber for containing flammable fuel,   a piezoelectric unit disposed within said housing, having a main casing, a plunger which is movable into said main casing when pressed downward, is able to actuate said piezoelectric unit to generate sparks for ignition, an auxiliary spring surrounding said plunger, and a blocking means fixed to a top end of said plunger,   an ignition trigger, when depressed, is able to release said flammable fuel and at the same time depress said plunger of said piezoelectric unit to generate sparks.   
   
   
       11 . The lighter as claimed in  claim 10 , wherein said blocking means has a shank inserted in a hole defined in said top end of said plunger and a cap a diameter of which is larger than an inner diameter of said auxiliary spring. 
   
   
       12 . The lighter as claimed in  claim 11 , wherein a plurality of flanges are formed on said blocking means around said shank. 
   
   
       13 . The lighter as claimed in  claim 10 , wherein said blocking means is an elastic ring covering on a pillar formed on said top end of said piezoelectric button. 
   
   
       14 . The lighter as claimed in  claim 10 , wherein said blocking means is made of plastic. 
   
   
       15 . The lighter as claimed in  claim 10 , wherein said blocking means is made of metal. 
   
   
       16 . The lighter as claimed in  claim 12 , wherein said pillar has a head. 
   
   
       17 . The lighter as claimed in  claim 13 , wherein said head has a tapering top surface.