Chair that is designed ergonomically to support a user's back snugly and completely
AssigneeSheng Jia Sheng Co., Ltd.
InventorChih-Yang Huang
Life of this patent
Estimating the term…
Abstract
A chair includes a base, a seat mounted on the base, a support bracket mounted on the seat, an upper backrest having an upper portion pivotally mounted on the support bracket, and a lower backrest pivotally mounted on a lower portion of the upper backrest. Thus, when a user's back is rested on the upper backrest and the lower backrest, the upper backrest and the lower backrest are pivotable relative to the support bracket to rest on the user's upper and lower backs respectively to support the user's whole back snugly and completely to prevent the user's lower back from depending in the air so as to provide a comfortable sensation to the user.
Claims15
A chair, comprising:
- a base;
- a seat mounted on the base;
- a support bracket mounted on the seat;
- an upper backrest having an upper portion pivotally mounted on the support bracket;
- a lower backrest pivotally mounted on a lower portion of the upper backrest;
- wherein
- the support bracket has a first end formed with a horizontal fixing portion secured to the seat and a second end formed with an upright support portion;
- the upper backrest has a mediate portion pivotally mounted on the support portion of the support bracket;
- the support portion of the support bracket has an upper end provided with two opposite outwardly protruding pivot shafts;
- the mediate portion of the upper backrest has two opposite sides each formed with a pivot hole pivotally mounted on a respective pivot shaft of the support bracket;
- the upper end of the support portion of the support bracket is provided with two opposite upwardly protruding stop blocks each perpendicular to a respective pivot shaft;
- the upper backrest is pivotable relative to the support portion of the support bracket to rest on the stop blocks of the support bracket to prevent an excessive movement of the upper backrest relative to the support portion of the support bracket.
A chair, comprising:
- a base;
- a seat mounted on the base;
- a support bracket mounted on the seat;
- an upper backrest having an upper portion pivotally mounted on the support bracket;
- a lower backrest pivotally mounted on a lower portion of the upper backrest;
- the lower portion of the upper backrest is provided with two opposite support arms;
- the lower backrest is pivotally mounted on the support arms of the upper backrest;
- each of the support arms of the upper backrest has a distal end provided with an outwardly protruding pivot stub;
- the lower backrest has two opposite sides each formed with a pivot bore pivotally mounted on the pivot stub of a respective support arm of the upper backrest.
Dependencies are inferred from the claim text.