Pan frame structure of seat cushion of a vehicle seat

Abstract

A structure of the so-called “pan frame” of seat cushion for use with a vehicle seat, which includes a primary reinforcing pattern press formed therein. The primary reinforcing pattern has a flat bottom region defined on its top and protrudes from the bottom wall of the seat-cushion pan frame. The primary reinforcing pattern further communicates with the securing areas where the frame is to be secured to a floor side of the vehicle. Hence, most of a load applied to the pan frame is dispersed via such pattern toward the securing areas, while being absorbed thereby. An auxiliary reinforcing pattern is press formed in the primary reinforcing pattern such as to surround each of the securing areas, thereby blocking further transmission of the load thereto. The primary reinforcing pattern may be of a generally X-shaped channel configuration which communicates its four channel sections with the securing areas, whereas the auxiliary reinforcing pattern be of an annularly protruded configuration that surrounds each of the securing areas.