Abstract: A seat pad manufacturing method is provided. The method includes disposing a sheet member inside a foaming mold for shaping a seat pad, then injecting a foaming resin material into the foaming mold and foaming a resin foamed body through mold clamping, and demolding the resin foamed body in a state in which the sheet member is buried in the resin foamed body. Both end parts of the sheet member in the right-left direction and both end parts of the sheet member in the extending direction are each temporarily fastened to the surface of the mold through a fastener. The foaming resin material is injected into a space between the mold surface and the sheet member. A central part of the sheet member deforms into a shape curved in a convex shape as the sheet member is pressed upward through expansion of the foaming resin material.

Abstract: A switch driving portion includes a lever link mechanism which as a pair of lever members respectively rocking about a rocking fulcrum by interlocking with a push button portion when the push button portion is pushed and arranged so as to be faced each other and in which the both lever members are connected each other at their faced ends by joint members so that they can be folded and slid and a switch operating member for opening or closing a built-in switch when the lever link mechanism is rocked by pushing in the push button portion.

Abstract: A switch driving portion includes a lever link mechanism which has a pair of lever members respectively rocking about a rocking fulcrum by interlocking with a push button portion when the push button portion is pushed and arranged so as to be faced each other and in which the both lever members are connected each other at their faced ends by joint members so that they can be folded and slid and a switch operating member for opening or closing a built-in switch when the lever link mechanism is rocked by pushing in the push button portion.