Leakage of a combustion gas is prevented by installing a seal ring in an annular groove provided in the outer peripheral surface of a fuel injection valve. The damper operating portion includes a first operation element that rotates in conjunction with the sun visor body; a second operation element that converts rotational movement of the first operation element to linear movement; and a third operation element that is moved linearly via the second operation element. Each of the end members is comprised of a truss having an upper wire and a lower wire. The controller is configured to control the operation of the coating unit, the lens curing unit and the post-cure unit.