Abstract: The present invention has the advantage of allowing a user to establish or release a seal between a container and a container lid with a single touch through a seal packing made of an elastic material and having a simple structure.

Abstract: Disclosed is an airtight container including a main body with an opening, and a cover, the airtight container including: an edge portion to press a sealing edge formed at an upper end of the main body; a locking clamp including an engaging portion to engage with an engaging-portion holder extended from the sealing edge or formed in a lateral wall; and a hinge provided between the edge portion and the locking clamp and including a material to be folded and unfolded with respect to the edge portion so that the engaging portion can be locked to and released from the engaging-portion holder. Thus, there is provided an airtight container with a soft hinge and a double injection-moulding structure, which is improved in durability because the hinge is prevented from damage even though it is used for a long time.

Abstract: The present invention has the advantage of allowing a user to establish or release a seal between a container and a container lid with a single touch through a seal packing made of an elastic material and having a simple structure.

Abstract: A closed container cover includes an upper plate moves down in accordance with rotation of a rotary knob and pushes outward a packing portion provided on a circumference of a lower plate, thereby having advantages that an inside of a container main body is easily closed by a simple operation, and production processes are decreased with the minimum elements to increase efficiencies of the production and the processes and significantly reduce production costs and lowering a selling price.