| 摘要 |
The present invention relates to a quadruple sealing structure for a can cover, in which an upper sealing portion 111 formed at an upper end portion of a can 110 is inserted into a circular groove 11 of an inner cover 10 to cover and seal an upper surface of the can 110, an inner O-ring 20 is inserted into the circular groove 11 of the inner cover 10 and tightly attached to the upper sealing portion 111 of the can 110 to improve a sealing effect, an outer coupling ring 30 having a plurality of coupling protrusions 31 is inserted into a plurality of coupling grooves 12 formed in an outer circumferential portion of the inner cover 10 to tighten the inner cover 10, and the left and right side surfaces and the upper surface of the upper sealing portion of the can are tightly attached to the inner cover triply at three surfaces to seal the upper surface of the can, block communication with the outside and maintain a sealed state, such that it is possible to simplify a structure and reduce production costs by sealing the upper surface of the can without using a sealing member, and the outer circumference of the inner cover is tightened by the outer coupling ring, which is coupled by the coupling groove instead of a screw structure, such that the upper surface of the can is sealed quadruply, and the upper sealing portion of the can, which is inserted into the circular groove of the inner cover, is prevented from being withdrawn from the circular groove, thereby increasing coupling force. |
