Thermal container

1. A thermal container, comprising a cover and a main body, the main body being formed with a storage space, the cover being movably connected to an opening of the main body, the cover being opened and closed relative to the main body through an opening-closing assembly; the opening-closing assembly including an upper connecting member and a lower connecting member that cooperate with each other, the upper connecting member being connected to the cover, the lower connecting member being connected to the main body; the cover being formed with a sealing protrusion that is located at an inner side of the upper connecting member and extends toward the main body, the main body being formed with an annular retaining wall extending from an upper portion of an inner wall of the main body, the sealing protrusion being movably fitted to the retaining wall; a sealing ring being provided at a mating portion between the cover and the main body, the sealing ring being fixed to one of the cover and the main body, wherein the sealing ring is made of an elastically deformable material and selectively compresses against the retaining wall and the sealing protrusion to effect sealing between the cover and the main body;

wherein the annular retaining wall of the main body comprises a top surface and a circumferential surface extending from the top surface to a bottom of the main body; and the sealing ring is located between the circumferential surface of the annular retaining wall of the main body and a predetermined surface of the sealing protrusion of the cover;

wherein the cover and the main body are made of fabrics; an upper shaping board is interlaid between the sealing protrusion and the cover; the retaining wall extends downward to the bottom of the main body, and a side shaping board is interlaid between the retaining wall and the main body;

wherein a support board is provided at a mating portion between the sealing ring and the cover or/and the main body.

2. The thermal container as claimed in claim 1 , wherein the predetermined surface of the sealing protrusion of the cover comprises a circumferential surface of the sealing protrusion and the sealing ring is disposed between the circumferential surface of the sealing protrusion and the circumferential surface of the retaining wall.

3. The thermal container as claimed in claim 1 , wherein the fabrics are made of a composite material comprising a textile material and one of a polyvinyl chloride (PVC), thermoplastic polyurethane (TPU), ethylene-vinyl acetate (EVA) and poly ethylene-vinyl acetate (PEVA) material.

4. The thermal container as claimed in claim 1 , wherein the upper shaping board and the side shaping board are made of PE cotton, ethylene-vinyl acetate (EVA), thermoplastic rubber (TPR) or nitrile butadiene rubber (NBR).

5. The thermal container as claimed in claim 1 , wherein the support board is made of a plastic material.

6. The thermal container as claimed in claim 5 , wherein the support board is fixed to a surface of an inner layer fabric of the main body or/and the cover.

7. The thermal container as claimed in claim 5 , wherein the support board is interlaid between an inner layer fabric and an outer layer fabric of the main body or/and the cover.

8. The thermal container as claimed in claim 1 , wherein the sealing ring is made of polyvinyl chloride (PVC), thermoplastic polyurethane (TPU), thermoplastic rubber (TPR), rubber or silicone.

9. The thermal container as claimed in claim 1 , wherein the opening-closing assembly is a zipper.