Containing Box Structure

Abstract

A containing box structure includes a containing box and a lid body. The lid body includes top and front lids. Concave portions are concavely disposed at the edge of a top opening of the containing box. An engaging portion with an S-shaped cross section is disposed at the edge of the front of the containing box. The edge of the top lid extends by a length to form abutting portions which straddle at the upper edge of the containing box, such that hook portions of the top lid are inserted into the concave portions, thereby effectuating precise engagement between the top lid and the containing box. A protruding portion extends from the lower edge of the front lid to engage with the engaging portion of the containing box. Therefore, the containing box is covered, and thus is in precise positional engagement, with the top lid and the front lid.

What is claimed is: 
     
         1 . A containing box structure, adapted to contain objects therein, the containing box structure comprising:
 a containing box adapted to contain objects therein and having a top opening;   a lid body including a top lid and a front lid and adapted to cover the top opening of the containing box, wherein concave portions are concavely disposed at a predetermined portion of an edge of the top opening of the containing box, and an engaging portion with an S-shaped cross section is disposed at a predetermined segment at an edge of a front of the containing box, wherein an inward side of an edge of the top lid extends by a predetermined length to form abutting portions which straddle at the edge of the top opening of the containing box, such that a hook portion at a predetermined segment of the top lid is inserted into the concave portions disposed at the predetermined portion of the edge of the top opening of the containing box, thereby effectuating precise engagement between the top lid and the containing box, wherein an inward side of an edge of the front lid extends by a predetermined length to form abutting portions for coming into tight contact with the edge of the front of the containing box after enclosing the edge of the front of the containing box, and a lower edge of the front lid extends by a predetermined length to form a protruding portion for imposing positional restriction on the engaging portion at a corresponding position on the containing box; and   the containing box is in precise positional engagement with the lid body when covered with the top lid and the front lid of the lid body, and a user only needs to exert a force on the front lid in order to lift the front lid and thus open the containing box easily.   
     
     
         2 . The containing box structure of  claim 1 , wherein auxiliary ribs are formed by extending by a predetermined length the inward sides of edges of the top lid and the front lid of the lid body covering the top opening of the containing box and adapted to reinforce the lid body when the containing box is covered with the top lid and the front lid of the lid body, so as to enhance tightness and stability of positional engagement between the lid body and the containing box. 
     
     
         3 . A containing box structure, comprising a lid body and a containing box, the lid body including a top lid and a front lid and adapted to cover a top opening of the containing box, and characterized by:
 a curved concave region defined at a forward edge of the top lid and having a predetermined width, a guide channel formed shallowly and concavely at a predetermined segment of each of left and right ends of the curved concave region, an engaging portion formed beneath the guide channel, and a hole formed at the forward edge of the top lid to penetrate the top lid and positioned on each of two sides of the curved concave region, wherein an engagement segment formed at an upper edge of the front lid and curving outward is inserted into the curved concave region of the top lid, such that a protruding portion formed by extending an upper portion of the engagement segment is inserted into a guide channel formed concavely at each of two ends of the curved concave region, wherein branch portions formed outwardly and protrudingly on two sides of the engagement segment are inserted into the holes at the curved concave region such that the front lid is pivotally coupled to the curved concave region of the top lid;   lifting the front lid relative to the curved concave region of the top lid, and moving the protruding portions on two sides of the engagement segment downward along the guide channels, respectively, such that the branch portions on the two sides of the front lid abut against the upper edges of the holes at the curved concave region as soon as the protruding portions pass the engaging portion of the curved concave region and thus their contact ends are pushed upward, and in consequence the front lid secures a positional restriction of appropriate tightness.   
     
     
         4 . The containing box structure of  claim 3 , wherein a notch is disposed on each of the two sides of the engagement segment formed at the upper edge of the front lid, and the notches correspond in position to the front edge of the top lid, so as to allow the top lid to be shut or lifted smoothly when pivotally coupled to the front lid.