Seat frame assembly

Abstract

A seat frame assembly is disclosed to include a base frame, which has two extension bars arranged in parallel at two sides, a back frame, which has a pivot axle transversely disposed on the middle and pivotally coupled between the extension bars of the base frame, and two support members coupled between two transversely extending bottom connection tubes of the base frame and the pivot axle of the back frame.

1 . A seat frame assembly comprising:
 a base frame, said base frame comprising comprises two side frame plates arranged in parallel at two sides, the side frame plates of said base frame each having a plurality of mounting holes arranged in line, two extension bars respectively formed integral with and extending from the side frame plates of said base frame, said extension bars each having a pivot hole at a distal end thereof, a plurality of first connection tubes and two second connection tubes respectively coupled between the mounting holes of the two side frame plates of said base frame and arranged in parallel at front and rear sides of said base frame, and two locating blocks respectively fixedly mounted on the two second connection tubes at the rear side of said base frame.   a back frame, said back frame comprising two side frame plates arranged in parallel at two sides, the side frame plates of said back frame each having a plurality of mounting holes spaced along the length thereof and a pivot hole on a middle thereof, a plurality of connection tubes respectively connected between the mounting holes of the two side frame plate of said back frame, a pivot axle mounted in the pivot holes of said extension bars of said base frame and the pivot holes of the side frame plates of said back frame to pivotally secure said back frame to said base frame, and a locating block affixed to a middle part of said pivot axle; and   two support members connected in parallel with connection tubes, said support members each having a top end pivotally coupled to said pivot axle of said back frame and respectively stopped at two opposite ends of the locating block at said pivot axle, and a bottom end coupled to the two second connection tubes of said base frame and respectively stopped against two distal ends of each of the locating blocks at the second connection tubes of said base frame.