Patent ID: 7137669

Claim:
A vehicle seat including a seat cushion which has a frame structure and a cushion member combined with said frame structure; said frame structure comprising: a pair of spaced apart side frame members; said side frame members having forward and rearward end portions; a front frame member fixed to said forward end portions of said side frame members; a connecting shaft extending between said rearward end portions of said side frame members and interconnecting said rearward end portions of said side frame members; a plurality of zigzag springs stretched between said front frame member and said connecting shaft; said cushion member being laid on said zigzag springs; each of said zigzag springs having first and second terminals; said first terminal being coupled to said front frame member; said second terminal being formed into a substantially U-shape in outline and comprising first and second spaced apart axial portions and an intermediate axial portion interconnecting said first and second axial portions; and a plurality of retainers for coupling second terminals of said zigzag springs to said connecting shaft therethrough; each of said retainers comprising a substantially U-shaped body in cross-section, a first spring-receiving section extending laterally from one end of said U-shaped body, and a second spring-receiving section extending laterally from the other end of said U-shaped body; said U-shaped body of said each of said retainers being mounted on said connecting shaft with an opening thereof facing downward; and said each of said zigzag springs being coupled at said second terminal thereof to a corresponding one of said retainers with said first axial portion and said second axial portion being engaged with a first spring-receiving section of said corresponding retainer and a second spring-receiving section of said corresponding retainer, respectively, and with an intermediate axial portion thereof being located under said connecting shaft and contacted with said connecting shaft.