Ignition mechanism for gas lighter

An ignition mechanism for a gas lighter that generates sparks upon rotation of a spark wheel against which a flint is held under pressure thereby comprising:

• a shaft-shaped support member rotatably installed in the body of a lighter,
• a spark wheel that can rotate with said supporting member as a unit,
• an elastic member installed around the shaft of said support member on at least one side of said spark wheel,
• a thumb wheel having a gear-type interior face installed around the exterior circumference of said elastic member so that said thumb wheel can idle, and so that it can be caused to be in the concentric or eccentric position in relation to said support member in response to a change in the shape of said elastic member,
• disk-shaped engaging-member that can rotate as a unit with said support member installed inside engaging-stopper of said thumb wheel, wherein said disk-shaped engaging-member having a gear-type exterior-circumference which can engage with the gear-type exterior-circumference which can engage with the gear-type interior face of the surrounding thumb wheel, being of a smaller size than said gear-type interior face of said thumb wheel when said thumb wheel is moved to the eccentric position,
• wherein, when said thumb wheel is maintained in the concentric position in relation to said supporting member by the elastic force of said elastic member, the gear-type interior face thereof is not engaged with the gear-type exterior circumference of said disk-shaped engaging member whereby said thumb wheel is idled, and said thumb wheel is switched to the eccentric position in response to a deformation of the elastic-member, whereby said spark wheel can be caused to rotate, while the gear-type inner face of said thumb wheel and the gear-type outer face of said disk-shaped engaging member are engage, by rotation of said thumb wheel.