Case assembly for electronic appliance

A case assembly for electronic appliance, comprising:

• a first case having a plurality of engaging members and each engaging member having two clamping protrusions which are located apart from each other, each clamping protrusion including a supporting portion and a protruding portion which extends laterally from the supporting portion, a space defined between the two clamping protrusions, the protruding portions of the clamping protrusions defining an opening of the space;
• a second case connected to the first case and an interior space defined between the first and second cases, the second case including a plurality of ports defined therethrough which are located corresponding to the engaging members, each port having a shoulder defined in an inside thereof and the shoulder located corresponding to the protruding portions of the clamping protrusions, and
• a plurality of positioning members each having an insertion portion and a head opposite to the insertion portion, an transverse width of the opening of the space being smaller than a width of the insertion portion, the insertion portion of each of the positioning members being inserted into the space corresponding thereto and the clamping protrusions being expanded outward by the positioning member, the protruding portions being engaged on the shoulder of the second case.