Lumbar support device
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Dec 31, 2002
Grant Date -
Nov 22, 2001
app pub date -
Mar 30, 2001
filing date -
Mar 30, 2000
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A lumbar support device for adjusting the position of the portion of the seating surface of a seat back corresponding to an occupant's lumbar region includes a frame member, a plane spring body provided with linear spring elements and supported on the frame member by hanger springs, and an adjusting mechanism for adjusting the position of the plane spring body. The adjusting mechanism adjusts the plane spring body position via torsion springs which has a relatively large spring constant. The load associated with the occupant's weight is shared by the hanger springs and the torsion springs. The linear spring elements corresponding to the occupant's lumbar region can be extended by a small outward shift or movement of the plane spring body. Therefore, this lumbar support device imparts a good supporting feeling to the occupant.
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