Patent ID: 9256251
Filing Date: 2016-02-09
CPC Classification: G02F,G06F,H05K

Claim Text:
1. A back frame, comprising: two first main pieces that are parallel to and are spaced from each other in a first direction; two second main pieces that are parallel to and are spaced from each other in a second direction; and two assembly sections respectively arranged on each of the first main pieces and each of the second main pieces for connecting the first and second main pieces together, the assembly sections comprising a plurality of anchor points arranged on different locations to allow the first and second main pieces to be assembled with a variable configuration by using different ones of the anchor points so as to set different sizes of the back frame; wherein the anchor points are rivet holes, screw holes, non-hole rivet points, or welding points and the assembly sections of the first and second main pieces comprise protrusions surrounded by the plurality of anchor points; and wherein the protrusions comprise a first protrusion and a second protrusion respectively formed on the assembly sections of the first and second main pieces, the second protrusion being movably received in a space limited by the first protrusion in such a way that a top of the first protrusion is closely adjacent to a top of the second protrusion, a support being arranged at a bottom of the second protrusion to prevent the protrusions from being deformed.