A display housing includes a first housing part including a plurality of first engaging members, a second housing part including a plurality of second engaging members, and a plurality of interlocking members, each of which is snappingly and detachably connected to and interlocks a respective one of the first engaging members and a respective one of the second engaging members. Engagement of each interlocking member with the respective first engaging member prevents relative movement between the first and second housing parts along directions of a first axis of a Cartesian coordinate system, along directions of a second axis of the Cartesian coordinate system, and along directions of a third axis of the Cartesian coordinate system. The first, second and third axes all being perpendicular to one another.