Automatic air-release box lid and preservation box

Abstract

Provided is an automatic air-release box lid, including: a box lid body provided with an air hole, the air hole being configured as a through-hole structure, openings at two ends of the air hole being located on an upper surface and a lower surface of the box lid body respectively; and a fastening lug having a rotating shaft part by which the fastening lug is hinged to the upper surface of the box lid body, the rotating shaft part and one opening of the air hole being arranged corresponding to each other and one above the other, the rotating shaft part having a blocking surface. Further provided is a preservation box, including: an automatic air-release box lid and a box body. The box lid is fitted to cover the box body.

1 . An automatic air-release box lid, comprising:
 a box lid body, the box lid body being provided with an air hole, the air hole being configured as a through-hole structure, one opening of the air hole being located on an upper surface of the box lid body and the other opening being located on a lower surface of the box lid body; and   a fastening lug, the fastening lug having a rotating shaft part by which the fastening lug is hinged to the upper surface of the box lid body, the rotating shaft part and one opening of the air hole being arranged corresponding to each other and one above the other, the rotating shaft part having a blocking surface, the fastening lug being rotatable to a fastened position and an open position, wherein   when the fastening lug is at the fastened position, the blocking surface blocks the opening of the air hole; and   when the fastening lug is at the open position, the blocking surface is separated from the opening of the air hole to unblock the air hole.   
     
     
         2 . The automatic air-release box lid according to  claim 1 , wherein the upper surface of the box lid body is provided with a recessed hinge groove near its edge, one opening of the air hole is located at a bottom surface of the hinge groove, and the rotating shaft part is rotatably arranged in the hinge groove. 
     
     
         3 . The automatic air-release box lid according to  claim 2 , wherein two side walls of the hinge groove are each provided with a shaft hole, and two ends of the rotating shaft part are connected to the two shaft holes respectively. 
     
     
         4 . The automatic air-release box lid according to  claim 1 , wherein the rotating shaft part is provided with an air guide groove along its radial direction, and the air guide groove comes into butt joint with the air hole when the fastening lug is at the open position. 
     
     
         5 . The automatic air-release box lid according to  claim 4 , wherein the air hole is internally provided with a hole-purposed sealing gasket. 
     
     
         6 . The automatic air-release box lid according to  claim 1 , wherein the fastening lug is provided with a fastening block. 
     
     
         7 . The vacuum heat-preservation box lid according to  claim 1 , wherein an annular seal ring is arranged on the lower surface of the box lid body. 
     
     
         8 . A preservation box, comprising:
 the automatic air-release box lid according to  claim 1 ; and   a box body, wherein the automatic air-release box lid is fitted to cover the box body;   when the fastening lug of the automatic air-release box lid is rotated to the fastened position, the box body is fastened by the fastening lug so that the automatic air-release box lid is fixedly connected to the box body, and when the fastening lug is rotated to the open position, the automatic air-release box lid is separated from the box body.