US 12,466,615 B2
Opening and closing mechanism for thermally insulated container
Jinfei Dong, Fujian (CN)
Filed by XIAMEN KINGQUEEN INDUSTRIAL CO., LTD., Fujian (CN)
Filed on Mar. 18, 2024, as Appl. No. 18/607,563.
Claims priority of application No. 202311672379.6 (CN), filed on Dec. 6, 2023.
Prior Publication US 2024/0217711 A1, Jul. 4, 2024
Int. Cl. B65D 43/16 (2006.01); B65D 43/22 (2006.01); B65D 53/02 (2006.01); B65D 81/38 (2006.01); F25D 3/08 (2006.01)
CPC B65D 43/163 (2013.01) [B65D 43/22 (2013.01); B65D 53/02 (2013.01); B65D 81/3813 (2013.01); F25D 3/08 (2013.01)] 8 Claims
OG exemplary drawing
 
1. An opening and closing mechanism, adapted to be used with a thermally insulated container, comprising:
an upper connecting piece, a lower connecting piece, and a sealing ring; the upper connecting piece and the lower connecting piece are both made of hard material;
a rear side of the upper connecting piece and a rear side of the lower connecting piece are pivotally connected, and an opening and closing assembly is provided between a front side of the upper connecting piece and a front side of the lower connecting piece;
a through hole is formed in the lower connecting piece; a protruding part having a shape corresponding to the through hole is provided on the upper connecting piece; a size of the protruding part is smaller than that of the through hole, and the protruding part is removably fitted in the through hole as the upper connecting piece moves pivotally with respect to the lower connecting piece;
the sealing ring comprises a sealing ring body mounted around a side wall of the through hole, and the sealing ring also comprises a hook part disposed around the sealing ring body and extending from an inner side of the sealing ring body into the through hole; the hook part is also integrally connected to the sealing ring body; the hook part has a groove that opens upwardly;
lower edges of the protruding part further extend downwardly to define an annular flange; the annular flange abuts against inner walls of the groove as the upper connecting piece closes against the lower connecting piece, and as the annular flange abuts against the inner walls of the groove, elasticity of the sealing ring allows the hook part to be driven downwardly and along a radial direction towards a center of the through hole;
a connecting part is formed between a connecting portion of the sealing ring body and the hook part; a thickness of the connecting part is smaller than a thickness of the hook part;
the thickness of the connecting part is one third to half of the thickness of the hook part.