Air-sealed body capable of automatically opening air valve

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,

wherein the at least one enlarged air-guiding portion is located at the air passage at a position above the first heat-sealing line 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

wherein the positioning portion is located at the air columns at a position below the first heat-sealing line for joining the first sides of the two inner films with the two outer films, the positioning portion having a first guiding side and a second guiding side located on opposing sides of a respective one of the second heat-sealing lines, each of the first and second guiding sides being inclined from the first heat-sealing line to a point at which each of the first and second guiding sides connects with the respective one of the second heat-sealing lines, the positioning portion extending continuously from the first guiding side to the second guiding side, such that the first sides of the two inner films are joined to the two outer films by a heat seal that extends continuously across the positioning portion from the first guiding side to the second guiding side, and the positioning portion including an additional heat-sealing line extending from each of the first and second guiding sides, respectively, wherein each additional heat-sealing line, along an entire length thereof, heat seals the first sides of the two inner films to 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.

2. The air-sealed body capable of automatically opening an air valve of claim 1 , wherein the positioning portion is integrally formed with the air-guiding portion, and the air inlets are located at sides of the positioning portion.

3. The air-sealed body capable of automatically opening an air valve of claim 2 , wherein the positioning portion joins the first sides of the two inner films and the two outer films.

4. The air-sealed body capable of automatically opening an air valve of claim 2 , wherein the at least one air-guiding portion joins the first sides of the two inner films and the two outer films.

5. The air-sealed body capable of automatically opening an air valve of claim 1 , further comprising: a plurality of air passages connected to the air inlets, wherein the air passages are spaces formed by joining the two inner films by means of heat-sealing.

6. A method for manufacturing an air-sealed body capable of automatically opening an air valve, comprising:

providing two inner films, each comprising a first side and a second side opposite to each other;

coating a plurality of heat-resisting materials between the first sides of the two inner films at intervals;

laminating two outer films to make the two inner films located between the two outer films;

joining the two outer films by means of heat-sealing to form a first heat-sealing line and a plurality of second heat-sealing lines, so as to form an air passage, at an upper portion of the air valve, and a plurality of air columns between the two outer films, the air passage and the air columns are divided by the first heat-sealing line and the air columns are divided by the second heat-sealing lines, the first sides of the two inner films being located in the air passage;

joining the two outer films to the two inner films by means of heat-sealing, so as to form a plurality of air inlets in the two inner films at the places where the plurality of heat-resisting materials are coated, thereby communicating the air passage with the air columns;

joining the two outer films to the two inner films by means of heat-sealing, so as to form a plurality of heat-sealed blocks at the places where the second heat-sealing lines intersected in the first heat-sealing line at the sides of the air inlets; each of the heat-sealed blocks comprising at least one enlarged air-guiding portion and a positioning portion,

wherein the enlarged air-guiding portion is located at the air passage at a position above the first heat-sealing line 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 being narrower than a lower part of the air-guiding portion, and

wherein the positioning portion is located at the air columns at a position below the first heat-sealing line for joining the first sides of the two inner films with the two outer films, the positioning portion having a first guiding side and a second guiding side located on opposing sides of a respective one of the second heat-sealing lines, each of the first and second guiding sides being inclined from the first heat-sealing line to a point at which each of the first and second guiding sides connects with the respective one of the second heat-sealing lines, the positioning portion extending continuously from the first guiding side to the second guiding side, such that the first sides of the two inner films are joined to the two outer films by a heat seal that extends continuously across the positioning portion from the first guiding side to the second guiding side, and the positioning portion including an additional heat-sealing line extending from each of the first and second guiding sides, respectively, wherein each additional heat-sealing line, along an entire length thereof, heat seals the first sides of the two inner films to the two outer films;

filling air to expand the air passage, so as to make the two outer films pulled open outward in a longitudinal direction and contract in a lateral direction;

squeezing the two inner films with the heat-sealed blocks, so as to pull open outward the places on the two inner films where the heat-resisting material is coated in the longitudinal direction and open the air inlets, such that the air is filled in the air columns; and

pressing by the air in the air columns against the second sides of the two inner films to close the air columns.

7. The method for manufacturing an air-sealed body capable of automatically opening an air valve of claim 6 , wherein the positioning portion is integrally formed with the air-guiding portion, and the air inlets are located at sides of the positioning portion.

8. The method for manufacturing an air-sealed body capable of automatically opening an air valve of claim 7 , wherein the positioning portion joins the first sides of the two inner films and the two outer films.

9. The method for manufacturing an air-sealed body capable of automatically opening an air valve of claim 6 , wherein the at least one air-guiding portion joins the first sides of the two inner films and the two outer films.

10. The method for manufacturing an air-sealed body capable of automatically opening an air valve of claim 6 , wherein an air-leading passage is formed between two of the plurality of heat-sealed blocks.

11. The method for manufacturing an air-sealed body capable of automatically opening an air valve of claim 6 , wherein before the step of providing the two inner films, the method further comprises: joining the two inner films by means of heat-sealing, so as to form a plurality of air passages located between the two inner films and connected to the air inlets.