| 摘要 |
PROBLEM TO BE SOLVED: To provide a lumber support for a vehicular seat which provides an excellent support property with a simple structure and an inexpensive constitution. SOLUTION: In the lumber support equipped to a seat back 1, a stabilizer 6 provided with a first and a second journals 6a, 6b and a crank pin part 6c located therebetween is arranged in the width direction of a frame 2 to be made rotatable with the rotation of a rotating member 10. A lumber plate 7 is slidably attached to the crank pin part 6c of the stabilizer 6, substantially in parallel therewith and a spring member 8 is attached to the front side of the lumber plate 7. By this constitution, the lumber plate 7 attached slidably to the stabilizer 6 and the spring member 8 are integrally rotated by the rotation of the rotating member 10, so that the height adjustment and the expansion amount adjustment of the lumber plate 7 and the spring member 8 are performed by the same operation employing the same mechanism. COPYRIGHT: (C)2003,JPO
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