Tilting control assembly for chair
AssigneeItoki Crebio Corporation
InventorsShunichi Takamatsu, Hirozi Kubo, Katsunori Hama, Hiroshi Iwabuchi
Life of this patent
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Abstract
The present invention provides a chair tilting control assembly which comprises a fixed frame mounted on a chair leg post, a tiltable member supported by the fixed frame to tilt downward about a lateral support shaft, and a chair seat movable downward under the weight of a sitter. The tilting control assembly comprises at least one tilting control spring for elastically supporting the tiltable member at a certain support position relative thereto, and a motion converting mechanism which converts downward movement of the seat into displacement of the support position rearwardly away from the lateral support shaft.
Claims9
A tilting control assembly for a chair, said chair comprising support means;
- a tiltable member pivotally connected to said support means by lateral shaft means, said tiltable member being downwardly tiltable by pivoting about said lateral support shaft means;
- and a seat carrier arranged above said support means to move downwardly toward said support means against weight responsive spring means under the weight of a sitter, said weight responsive spring means being arranged under said seat carrier;
- said tilting control assembly comprising:
- tilting control spring means arranged between said support means and said tiltable member to provide a support position for elastically supporting said tiltable member against tilting thereof relative to said support means;
- and
- displacing means responsive to said weight for automatically displacing said support position relative to said tiltable member in a manner such that said support position becomes farther from said support shaft means as said weight increases.
Dependencies are inferred from the claim text.