Adjustable back pad

Abstract

The present invention discloses an adjustable back pad which is formed primarily by a back rack and two back rests. The back rack includes plural slot holes which are left-and-right symmetric and two elastomers. A rear side of each back rest is provided with an elastomer and an elastic element. When assembling the back rack with the back rests, a screw first penetrates a washer and then one slot hole of the back rack, followed by being locked into a lock hole at a center of the elastomer on the back rest. As there are ten elastic buffering pivots between the two back rests and back rack, the ergonomic and breathing back pad of the present invention can completely mitigate a pressure exerted to a lumbar vertebrae or a lower back of a user, thereby soothing fatigue and soreness and providing a most comfortable sitting cushion.

Description

BACKGROUND OF THE INVENTION[0001]a) Field of the Invention[0002]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.[0003]b) Description of the Prior Art[0004]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.SUMMARY OF THE INVENTION[0005]Accordingly, the primary object of the present invention is to provide an adjustable ...

AI Technical Summary

Benefits of technology

[0005]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.

Problems solved by technology

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.

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