초록 ▼

A chair includes a flexible back shell, a back covering that covers at least a portion of a front surface of the back shell, and an adjustable lumbar device positioned between the back shell and the back covering. The adjustable lumbar device is flexible so that the lumbar device will flex to confor

A chair includes a flexible back shell, a back covering that covers at least a portion of a front surface of the back shell, and an adjustable lumbar device positioned between the back shell and the back covering. The adjustable lumbar device is flexible so that the lumbar device will flex to conform to a horizontal shape of the chair back shell, but is relatively stiff in a direction perpendicular to a front surface of the back shell, such that the lumbar device provides good lumbar support. The lumbar device is positioned between the back shell and the back covering for vertical height adjustment, and frictionally engages the same to retain its adjusted position. Further, the adjustable lumbar device includes rearwardly-extending protrusions that engage slots in the back shell to form a detent-like feature for holding a selected position, and further includes forwardly protruding tabs that act as handles for grasping the lumbar device for adjustment. In a preferred form, the back covering is tensioned such that it presses the lumbar adjustment device against the back shell for better holding power.

대표청구항 ▼

1. A chair comprising:a back having first edges and a lumbar section with horizontal slots therein that provide flexibility to the lumbar section; a back cover covering a front surface of the back and having second edges; and an adjustable lumbar device positioned between the back and back cover, th

1. A chair comprising:a back having first edges and a lumbar section with horizontal slots therein that provide flexibility to the lumbar section; a back cover covering a front surface of the back and having second edges; and an adjustable lumbar device positioned between the back and back cover, the adjustable lumbar device including integrally-molded rearwardly-extending detent projections extending into engagement with the horizontal slots for holding the lumbar device in a selected position.