Work Chair

a work chair and ergonomic technology, applied in the field of ergonomic work chairs, can solve the problems of increasing muscle fatigue, painful muscular strain, and the inability of the sacro spinalis to hold the spinal column upright, and achieve the effect of improving the strength of the muscle of the sacro spinalis
US20090278391A1Inactive Publication Date: 2009-11-12ULRICH HANS JURGEN
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Patent Information

Authority / Receiving Office
US · United States
Patent Type
Applications(United States)
Current Assignee / Owner
ULRICH HANS JURGEN
Publication Date
2009-11-12
Estimated Expiration
Not applicable · inactive patent

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Abstract

An ergonomic work chair for activities requiring a bent-forward posture has the following features: a supporting cylinder which protrudes from a star base, a supporting column, which is mounted in the supporting cylinder such that it can be displaced in a vertical cylinder axis, for a base plate with a seat which is fixed on the base plate, a base arm which is fitted to the supporting column or to the base plate, and a pivoting arm, which is mounted on the base arm such that it can be rotated out of the seat region about a vertical axis, having a chest rest and side arm rests, and a support which has a star rest and is hinge-connected to the base plate via a lever mechanism which has fulcrums such that pressing down on the seat causes the star rest to move in the direction of the chest rest.
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Description

TECHNICAL FIELD OF THE INVENTION

[0001] The present invention relates to an ergonomic work chair for the performance of activities in bent-forward posture.PRIOR ART

[0002] In manual activities which are practiced in seated position with slightly bent-forward posture, such as, for example, in dentistry, the musculature in the small of the back—the sacro spinalis—is permanently tensed in order to keep the spinal column straight and absorb the torque upon the backbone. This leads to an increasing fatigue of the musculature, resulting in painful muscular strains (for example lumbago). Furthermore, declining muscle strength of the sacro spinalis can no longer hold the spinal column upright, with the result that this deviates rearward and passes into the so-called lordosis posture. This produces a permanent overstraining of the lower vertebrae and causes the chronic lower back pains which are widespread in our civilization.

[0003] In a chair disclosed in EP-B-0 672 370, the lumbar rest is conne...

Claims

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