Patent ID: 8960790
Filing Date: 2015-02-24
Classification: B60N

Abstract:
1. A vehicle seat comprising: a seat back portion provided with a tension structure extended on a back frame; a seat cushion portion provided with a tension structure extended on a cushion frame, both being connected through a reclining mechanism; wherein a pair of side frames of said back frame is each formed so as to have a substantially rectangular closed sectional shape by oppositely arranging an inner frame and an outer frame, each having a predetermined width and length, and provided such that a longitudinal direction thereof is directed substantially along the front-and-rear direction of said back frame; a first pipe frame which protrudes upward through an upper end opening of each side frame of said back frame and provided between front sides of side frames; and a second pipe frame provided between depth sides; and wherein a natural frequency in a right-and-left direction of said back frame is lower than a natural frequency in a front-and-rear direction of said back frame.