Patent ID: 6776384
Filing Date: 2004-08-17
Classification: B60N

Abstract:
A seat of a vehicle comprising:(A) a pair of frames including an upper frame and a lower frame disposed vertically away from each other; (B) a parallel maintaining mechanism including a first link and a second link which are rotatably connected to each other at intermediate parts thereof to form an X-shape, said first link being slidably connected at an upper end portion thereof to said upper frame and rotatably connected at a lower end portion thereof to said lower frame, said second link being rotatably connected at an upper end portion thereof to said upper frame and slidably connected at a lower end portion thereof to said lower frame; (C) a slide member slidably disposed at one of said upper frame and said lower frame; (D) a suspension spring extending along said one frame, one end portion of said suspension spring being connected to said one frame and the other end portion being connected to said slide member; and (E) cam means disposed between one of said first link and said second link and said slide member and adapted to convert rotation of said link into sliding movement of said slide member and hence into expansion/contraction of said suspension spring; said suspension spring biasing said one link in a rising direction through said slide member and cam means, thereby supporting said upper frame, said cam means includes an abutment member disposed at said one link, and an inclination cam face formed on said slide member and brought into abutment with said abutment member by said suspension spring.