An assembly structure of a case is disclosed. The assembly structure includes
an upper case and a lower case. The upper case has a connection portion having
a first cavity, a first protrusion, a first trench and a second protrusion arranged
from the external side to the internal side thereof. The lower case has a connection
portion having a first cavity, a first protrusion and a second cavity arranged
from the external side to the internal side thereof. Both the first cavity and
the first protrusion of the upper case are opposite to the first cavity of the
lower case, and the first trench and the second protrusion of the upper case are
opposite to the first protrusion and the second cavity of the lower case, respectively,
so as to assemble the upper case and the lower case.
