Seat structure

Details Seat structure Seat structure

2011-07-05

2011-07-05

Brown, Peter R. (Department: 3636)

Chairs and seats

Bottom or back

Cushioned

Reexamination Certificate

active

07971939

ABSTRACT:
A seat structure which can ameliorate fatigue of a sitting person in accordance with a long period of sitting is provided.In a vehicle seat10, a back edge side of a lower layer sheet50of a cushion material20, of which a front edge side is fixed to a front edge side of a sitting portion frame14, is resiliently connected to a back edge side of the sitting portion frame14via a movable frame34and a torsion bar46, which is a resilient member. The cushion material20has a spring zero characteristic in which a spring constant of a portion that supports a protrusion portion of the sitting person is smaller than a spring constant of other portions. This vehicle seat10makes smaller the energy of vibrations which are transmitted to a spinal column portion of the sitting person through the sitting portion frame14, and peripheral portions thereof convert vibrations corresponding to fluctuations in the body and transmit these through the sitting portion frame14. α waves of 10 Hz to 12 Hz, which occur in a relaxed waking state, are caused in the brain of the sitting person. Vibrations in a resonance frequency region are attenuated in amplitude and transmitted to the sitting person.

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Notice of Reasons for Rejection issued in Japanese Patent Application No. 2004-109923; mailed Jun. 15, 2010; with English-language translation.

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