To solve a problem wherein a slide-type switch mounted on a substrate inside and a slide-type lever attached to the exterior to operate the switch require a phase matching of the engaging position, which results in poor assembling efficiency.

A slide lever mechanism comprises a slide-type lever in which an engaging portion to be engaged with a slide-type switch is given elasticity in a direction perpendicular to the sliding direction and in a direction perpendicular to the exterior surface to thereby secure a relief in the case of misalignment of the engaging points. It is therefore possible to temporarily perform assembly without matching the phases. Then, by actuating the lever, the relief part recovers to the initial state at a position where the phases match, thereby enabling engagement at a normal position.