A lighter comprising: a) an outer case having a first sidewall disposed in spaced apart relation to a second sidewall, a first end wall disposed in spaced apart relation to a second end wall and a base connected to the first sidewall, second sidewall, first end wall, and second end wall, and an outer case opening opposite the base, b) a lid comprising a cover wall connected to a first lid sidewall disposed in a spaced apart relation to a second lid sidewall, and a first lid end wall disposed in a spaced apart relation to a second lid end wall, and a lid opening opposite the cover wall, c) a curved hinge comprising a curved hinge outer case portion connected to the second end wall of the outer case and a curved hinge lid portion connected to the second lid end wall and a pin used for holding the curved hinge outer case portion and curved hinge lid portion together, d) an inside unit disposed in the outer case, the inside unit comprising a plate connected to a first casing sidewall disposed in spaced apart relation from a second casing side wall, a first-casing end wall disposed in spaced apart relation to a second casing end wall the first casing sidewall and second casing sidewall extend above the plate and form a front pair of lugs and a rear pair of lugs, e) a flint wheel mounted between the front pair of lugs and disposed adjacent to the flint wheel a wick extending from a fuel reservoir defined inside the inside unit and a flint in contact with the flint wheel and used for generating sparks when rotated to ignite the wick, and f) a cam mounted to the rear pair of lugs and having a cam contact surface having curved portions wherein the curved portions allow for sliding contact between a matching curved surface of the curved hinge and a curved surface of the cam when the lid is opened and closed so that interference between the curved hinge lid portion and the cam is reduced. a) an outer case having a first sidewall disposed in spaced apart relation to a second sidewall, a first end wall disposed in spaced apart relation to a second end wall and a base connected to the first sidewall, second sidewall, first end wall, and second end wall, and an outer case opening opposite the base, b) a lid comprising a cover wall connected to a first lid sidewall disposed in a spaced apart relation to a second lid sidewall, and a first lid end wall disposed in a spaced apart relation to a second lid end wall, and a lid opening opposite the cover wall, c) a curved hinge comprising a curved hinge outer case portion connected to the second end wall of the outer case and a curved hinge lid portion connected to the second lid end wall and a pin used for holding the curved hinge outer case portion and curved hinge lid portion together, d) an inside unit disposed in the outer case, the inside unit comprising a plate connected to a first casing sidewall disposed in spaced apart relation from a second casing side wall, a first-casing end wall disposed in spaced apart relation to a second casing end wall the first casing sidewall and second casing sidewall extend above the plate and form a front pair of lugs and a rear pair of lugs, e) a flint wheel mounted between the front pair of lugs and disposed adjacent to the flint wheel a wick extending from a fuel reservoir defined inside the inside unit and a flint in contact with the flint wheel and used for generating sparks when rotated to ignite the wick, and f) a cam mounted to the rear pair of lugs and having a cam contact surface having curved portions wherein the curved portions allow for sliding contact between a matching curved surface of the curved hinge and a curved surface of the cam when the lid is opened and closed so that interference between the curved hinge lid portion and the cam is reduced.