Sealing structure

A sealing structure, comprising:

• a box body, comprising a plurality of side walls, a first annular groove, and a first annular protrusion portion, wherein the plurality of side walls respectively comprise a plurality of outer portions and a plurality of inner portions, each of the outer portions has a level difference with the corresponding inner portion, the first annular groove is formed on the plurality of inner portions, the first annular protrusion portion is formed on an inner peripheral edge of the first annular groove, corner portions are formed between the plurality of side walls, each of the corner portions is formed between any two adjacent ones of the plurality of side walls, each of the corner portions is formed as a sharp corner, the first annular groove is arc-shaped at a position corresponding to each of the corner portions, and each of the corner portions comprises a hollowed-out area;
• and
• a cover body, comprising a main body, a second annular protrusion portion protruding from the main body, and a second annular groove, wherein the main body is in a shape of a polygon with sharp corners, the first annular protrusion portion extends into the second annular groove, the second annular protrusion portion extends into the first annular groove, and the cover body is sealedly joined to the box body,
• wherein each of the first annular groove and the second annular protrusion portion forms a continuous ring and spans the corner portions.

A sealing structure, comprising:

• a box body, comprising a plurality of side walls and an annular peripheral edge, wherein the plurality of side walls respectively comprise a plurality of outer portions and a plurality of inner portions, each of the outer portions has a level difference with the corresponding inner portion, the annular peripheral edge is formed on the plurality of inner portions, corner portions are formed between the plurality of side walls, each of the corner portions is formed between any two adjacent ones of the plurality of side walls, each of the corner portions is formed as a sharp corner, the annular peripheral edge is arc-shaped at a position corresponding to each of the corner portions, and each of the corner portions comprises a hollowed-out area;
• and
• a cover body, comprising a main body and an annular protrusion portion protruding from the main body, wherein the main body is in a shape of a polygon with sharp corners, and the annular protrusion portion fits the annular peripheral edge, so that the cover body is sealedly joined to the box body,
• wherein each of the annular peripheral edge and the annular protrusion portion forms a continuous ring and spans the corner portions.