Abstract: An adjustable back cushion structure comprises an adjusting device, which has three portions, a positioning portion, an adjusting portion and a joining portion, the positioning portion is disposed a block portion thereon, a plurality of fixing portions are disposed between the positioning portion and the adjusting portion, a joining surface is on the top end of the joining portion; and a cushion, which is a member covered by a loop surface, filler is filled into the cushion, any of the surface of the cushion is able to to join the joining surface of the adjusting device.

Abstract: A back cushion includes an enclosure portion, a buffer portion, a filler portion and a fixing portion. The enclosure portion has a first surface/layer and a second surface/layer. The buffer portion and the filler portion are placed in the internal space of the enclosure portion. The buffer portion is in contact with the first layer and the rear surface of the filler portion is in contact with the second layer. The fixing portion is connected with the second layer of the enclosure portion. The fixing portion enables the back cushion to be attached to a suitable place of a chair or a supporting member. The buffer portion allows the back of a user can be comfortably cushioned and supported and hence injuries to his back may be avoided.

Abstract: A protective cover for motor vehicle mainly includes a cover, at least two flexible metal rings that are lengthwise sequentially spaced at and attached to an inner side of the cover to enclose a relatively large area of the cover, and adjustable belts with hook belt fasteners spaced at a lower edge of the cover. The flexible metal rings are adapted to automatically stretch the cover for covering an upper part of a motor vehicle, and the hook belt fasteners are adapted to firmly hold the cover to a lower part of the motor vehicle. To fold and store the cover, simply fold the cover to align the metal rings with each other, and bend the aligned metal rings into several superposed smaller loops, so that the folded cover may be stored in a bag in the flat and folded state to occupy only a relatively small space.