| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a lumbar support device easy to mount a fish mouth spring and a sub frame for reducing members to mount the fish mouth spring and the sub frame. <P>SOLUTION: The lumbar support device has: a seat back frame 1; a sub frame 7 one end part of which is mounted on the seat back frame 1; a fish mouth spring 13, the base end part of which is mounted on the seat back frame 1, the end part of which is connected with the other end part of the sub frame 7, and which has torsion arm portions 13g and 13h between the base end part and the tip part; a warp plate 23 supported by the sub frame 7; a base plate 11 provided on the sub frame 7; and a drive portion provided on the base plate 11 to drive the warp plate 23. The base plate 11 and the fish mouth spring 13 are provided with rotation prevention portions that prevent rotations around the fulcrums being the base end parts of the torsion arm portions 13g and 13h using one fish mouth spring 13. <P>COPYRIGHT: (C)2013,JPO&INPIT |
