| 主权项 |
1. An air-sealed body capable of automatically opening an air valve, comprising:
two outer films, laminated on top of each other; two inner films, disposed between the two outer films, and each comprising a first side and a second side opposite to each other; a plurality of heat-resisting materials, coated between the first sides of the two inner films at intervals; an air passage, being a space formed by joining the two outer films by means of heat-sealing, and comprising an air-filling port for filling air, and the first sides of the two inner films being located in the air passage; a plurality of air columns, being spaces capable of storing air and formed by joining the two outer films by means of heat-sealing; a first heat-sealing line, formed by joining the two outer films and the two inner films by means of heat-sealing to divide into the air passage and the air columns; a plurality of second heat-sealing lines, intersected in the first heat-sealing line and formed by joining the two outer films and the two inner films by means of heat-sealing to divide into the air columns; a plurality of air inlets, formed between the two inner films at the places where the first heat-sealing line overlaps the heat-resisting material so as to communicate the air passage with the plurality of air columns; a plurality of heat-sealed blocks, formed at the places where the second heat-sealing lines intersected in the first heat-sealing line and at the sides of the air inlets by joining the two outer films to the two inner films by means of heat-sealing, each of the heat-sealed blocks comprising at least one enlarged air-guiding portion and a positioning portion, the at least one enlarged air-guiding portion located at the air passage and having two opposite guiding sides for guiding the air in the air passage into the air inlet, each of the guiding sides being inclined from the first heat-sealing line to a top of the air-guiding portion and intersecting with each other such that an upper part of the air-guiding portion is narrower than a lower part of the air-guiding portion, and the positioning portion located at the air columns for joining the first sides of the two inner films with the two outer films; and an air-leading passage formed between two adjacent of the plurality of heat-sealed blocks and connecting the air inlets; wherein after the air is filled in via the air-filling port to expand the air passage, the two outer films are pulled open outward in a longitudinal direction and contract in a lateral direction, the two inner films are squeezed with the heat-sealed blocks so as to make the places on the two inner films where the heat-resisting material is coated pulled open outward in the longitudinal direction and open the air inlets, and the air presses against the second sides of the two inner films to close the air columns after entering the air columns. |
