Modular cabinet and connector module thereof

A cabinet comprising:

• a structural frame having a rectangular columnar shape and including
• a plurality of connecting rods, each of which has two opposite connecting end portions, and
• a plurality of connector modules interconnecting said connecting rods and respectively disposed at corners of said structural frame, each of said connector modules including
• a first connector including two first main plate portions perpendicularly connected to each other, each of said first main plate portions having an inner surface, an outer surface opposite to said inner surface, a first edge surface between first edges of said inner and outer surfaces, and a second edge surface between second edges of said inner and outer surfaces and perpendicularly connected to said first edge surface, said first connector further including two connecting plate portions each of which is formed on said outer surface of a respective one of said first main plate portions for connection with said connecting end portion of one of said connecting rods, a first fastening hole extending through a junction of said second edge surfaces of said first main plate portions, and a limiting indented portion located on said junction of said second edge surfaces of said first main plate portions and adjacent to said first edge surfaces of said first main plate portions, said inner surfaces of said first main plate portions cooperatively defining an assembling space therebetween, and
• a second connector detachably connected to said first connector and including a second main plate portion perpendicular to said first main plate portions and abutting against said first edge surfaces of said first main plate portions, a seat body that is connected to a side of said second main plate portion, that is received in said assembling space, and that abuts against said first main plate portions, and a connecting plate portion formed on another side of said second main plate portion opposite to said seat body for connection with one of said connecting end portions of one of said connecting rods, said second main plate portion having a first edge surface and a second edge surface perpendicularly connected to each other and respectively corresponding to said first edge surfaces of said first main plate portion, said seat body having a first fastening hole extending therethrough and corresponding in position to said first fastening hole of said first connector, said first fastening holes of said seat body and said first connector being configured to cooperatively receive and engage a fastening member to fasten together said first and second connectors, said second connector further including a limiting protruding portion that protrudes inwardly from said second main plate portion, that is located between said first and second edge surfaces of said second main plate portion, and that has a shape complementing with that of said limiting indented portion to abut against said limiting indented portion;
• and
• an outer wall unit including a plurality of wall panels assembled to said structural frame and cooperating with said structural frame to form an accommodating space,
• wherein said limiting indented portion has two triangular inclined surfaces extending inclinedly, inwardly and respectively from said first edge surfaces of said first main plate portions toward each other so as to connect with each other.