Provided is an assembled body assembled by splicing frames through male joint and female interface. The male joint includes a stopping edge and a locating protrusion, where the stopping edge extends in a first direction and the locating protrusion extends in a second direction orthogonal to the first direction. The female interface includes a first U-shape recess, and an inner surface of the recess is provided with a stopping groove and a locating slot adapted for retaining the stopping edge and the locating protrusion respectively.