| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a seat back board capable of uniting the reduction in stress concentration generated on a resin spring part and the thinning of a seat back with a simple constitution and to provide a vehicle seat using the seat back board. <P>SOLUTION: A back spring part 38 of the seat back board 16 includes a lower side back spring body part 48 and an upper side back spring body part. For example, a large number of wavy parts 48A which are formed wavily by connecting a plurality of curved surfaces in the seat width direction when being viewed in a flat cross-sectional surface are formed on the lower side back spring body part 48. The board thickness of the lower side back spring body part 48 including the wavy parts 48A are set to be maximized at both end parts 48B and the center part 48C in the seat width direction and to be minimized at middles between the both end parts 48B and the center part 48C in the seat width direction. <P>COPYRIGHT: (C)2012,JPO&INPIT |
