Abstract: A striker wheel assembly mounting structure including a wheel axle mounted between two upright supports at the top of a butane wheel, two driving wheels mounted around the wheel axle between the upright supports, and a striker wheel fixedly mounted around the wheel axle and disposed in contact with a spring-supported flint below and turned by the driving wheels through the wheel axle to strike the spring-supported flint in producing sparks, wherein the wheel axle is made of polygonal cross section, having two round rods at two opposite ends loosely inserted into a respective axle hole on each upright support; the driving wheels have a center through holes of bigger diameter relative to the wheel axle for passing the wheel axle, at least one center through hole of the driving wheels is a polygonal center through so arranged that the driving wheels run idle when turned without being depressed, or turned to rotate the wheel axle and the striker wheel when depressed.

Abstract: A gas lighter including a safety knob mounted on the holder frame at the top of the butane well and covered by a casing, which holds the gas lever and the striker wheel, the safety knob being moved horizontally between a locking position to stop the gas lever from turning downward in releasing the fuel gas, an unlocking position for permitting the gas lever to be depressed to release the fuel gas, the safety knob having a hooked end alternatively engaged in two retaining holes on the casing, the gas lever having a bottom rod, which is inserted into one retaining hole on the casing to push the hooked end of the safety knob from the unlocking position to the locking position when the gas lever is depressed.