Patent ID: 6065626
Filing Date: 2000-05-23
Classification: B65D

Abstract:
An improved box opening/closing structure comprising a box, a box cover, a lifting cover;said box having an opening;said box cover having a same shape of the opining, a recess being disposed on a middle of the box cover, a circular slot side being disposed on an edge of said box cover and a channel being disposed on an inner side of said circular slot side, a sealing ring being disposed in a slot frame near said channel, a clutching slot being disposed near said channel so as to engage with a guiding block, said guiding block having an end, said end having a guiding in port, said guiding port being communicated with a guiding slot, said guiding slot being communicated with a positioning slot, and a guiding out slot being connecting with said guiding port and said positioning slot so that a loop is formed, each slot having a slot surface that is a one-way guiding surface, and a stopping block being formed within said loop among these slots,said lifting cover being shaped according to said recess of the box cover, a first circular frame rim being disposed on an inner surface of said lifting cover for securing a spring, a pressing disk being disposed facing the inner surface with a gap, said pressing disk having a second circular frame rim facing said lifting cover so that the spring can be set within the gap therebetween, a clutching slot being formed away from said first circular frame rim with a predetermined distance for an assembling block to engage with, said assembling block being reversed U-shaped and a connecting rod being disposed on its middle for engaging with a locking rod, two end of said assembling block extending two resilient rods respectively, one end of said locking rod having a hole for connecting with said connecting rod, the other end of said locking rod being formed as a hooking rod;so that when a user wants to close said lifting cover on said box cover, the hooking rod of said locking rod is guided from said guiding in port into said guiding slot and then slides into said positioning slot along said one-way guiding surface and finally locked by said assembling block due to a balanced resilient force between said two resilient rods so as to secure said lifting cover on said box cover; whereas when the user wants to open said lifting cover from said box cover, by pressing said lifting cover down, said hooking rod of the locking rod will leave said position slot and pass through said guiding out slot and then move out from said guiding in port along such one-way guiding surface so that said locking rod is separated from said guiding block; and when said lifting cover is locked on said box cover by said locking rod and said guiding block, said lifting cover makes said spring to press on said pressing disk and further press on said sealing ring so as to achieve an excellent sealing effect such that a moisture inside said box cane be well kept inside.