a) Field of the Invention
The present invention relates to an adjustable back pad, and more particularly to a back pad which can be emplaced on a chair back to reduce a pressure exerted to a lumbar vertebra or a back, thereby mitigating fatigue and soreness caused by an improper sitting posture.
b) Description of the Prior Art
A back of an ordinary office chair or vehicle chair is mostly fixed and cannot be adjusted. Therefore, it is easy to result in waist soreness and back pain to a user after a long time of use. Although most users will put a cushion on the chair to soothe a pressure exerted to a lumbar vertebra, the cushion is not equipped with an elastic buffering function, and thus, when a vehicle is running on a bumpy road, it is easy to cause lower back pain and fatigue from an improper sitting posture to the user.
Accordingly, the primary object of the present invention is to provide an adjustable back pad, wherein a novel back pad to improve the shortcoming of a conventional cushion or back rest that the waist soreness and back pain to the user cannot be overcome completely and efficiently. The elastic back pad can be used to adjust an up, down, left, right position of the back rest to adapt to the users of various body shapes; whereas, a design of a dual back rest uses a hollow ventilation structure, so that the user can feel more comfortable. The present invention is primarily characterized in that rear sides of the back rests are provided with plural elastomers and elastic elements to mitigate the pressure exerted to the lumbar vertebrae and to modify the sitting posture, thereby soothing a phenomenon of waist soreness and back pain.
To enable a further understanding of the said objectives and the technological methods of the invention herein, the brief description of the drawings below is followed by the detailed description of the preferred embodiments,
Referring to
A back plate of each symmetric back rest 20 is provided with plural openings 21 for ventilation. As shown in
Referring to
There are a total of ten elastic buffering pivots between the two back rests 20 and the back rack 10. Among the ten pivots, two pivots are provided respectively on the elastomer 22 of one back rest 20, and so there are a total of four pivots for the two back rests 20. Each elastomer 13 on the back rack 10 is provided respectively with two pivots, and hence, there are a total of four pivots for the two elastomers 13. The elastomer 23 of each back rest 20 is provided respectively with one pivot, and thus, there are a total of two pivots for the two back rests 20, Accordingly, there are a total of ten elastic buffering pivots between the two back rests 20 and the back rack 10, these pivots are provided with an excellent elastic supporting function for a waist and a back of the user.
In conclusion, the present invention provides an adjustable back pad which is an ergonomic back pad and put on an ordinary chair back to provide the user with a most comfortable and best elastic buffering function, in addition to being provided with a ventilation function, Therefore, the present invention is able to mitigate the pressure exerted to the lumbar vertebra or the lower back actually and effectively, modify the sitting posture of the user, and even soothe a phenomenon of fatigue and soreness.
It is of course to be understood that the embodiments described herein is merely illustrative of the principles of the invention and that a wide variety of modifications thereto may be effected by persons skilled in the art without departing from the spirit and scope of the invention as set forth in the following claims.
Number | Date | Country | Kind |
---|---|---|---|
099223200 | Nov 2010 | TW | national |