A gradual adjustment system and method of a lumbar support of a seat enables a protruding portion on a surface of a chair back to slide to improve comfort of the seat. The system comprises an air bag grouping the chair back corresponding to a waist position of a human body. The air bag group consists of at least three partially overlapping air bags arranged from top to bottom. The air level of each air bag is adjusted by a control module operating an air distributing valve. The control module comprises a plurality of adjusting buttons capable of controlling other adjacent air bags to correspondingly exhaust air when one air bag is inflated, and is connected to, via a signal, a timing unit capable of recording an air filling time or an air emptying time of each air bag in the air bag group controlled by any one of said adjusting button, thus enabling the protruding portion of the lumbar support to slide linearly, and differing from a conventional method of controlling air filling and emptying a single air bag.
GRADUAL ADJUSTMENT SYSTEM AND METHOD OF LUMBAR SUPPORT OF SEAT
01.03.2018
Patent
Elektronische Ressource
Englisch
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