Seat backrest having an adjustable lumbar support

Details Seat backrest having an adjustable lumbar support Seat backrest having an adjustable lumbar support

A - Human Necessities

47

C

155/2, 155/50

A47C 3/00 (2006.01) A47C 1/031 (2006.01) A47C 7/46 (2006.01) B60N 2/66 (2006.01)

Patent

CA 1190467

SEAT BACKREST HAVING AN ADJUSTABLE LUMBAR SUPPORT ABSTRACT A seat backrest having an adjustable lumbar support is provided wherein the cam sur- face of a rotatable cam of a regulating mechanism, which adjusts the lumbar support, is effectively utilized to facilitate manual adjust- ment of the lumbar support. Rotation of the cam in a first direction cams a follower away from the axis of rotation of the cam. The follower causes an attached bar to rotate therewith. A lumbar support plate is supported by a canti- levered resilient or rigid element in the form of a leaf spring which is supported by the bar.

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