Patent ID: 8248802

Claim:
A backboard assembly comprising: a back plate; an electrically insulative sheet; and a connection element having a first side and an opposite second side, wherein the connection element comprises a plurality of first engaging structures on the first side thereof to engage with the back plate and a plurality of second engaging structures on the second side to engage with the electrically insulative sheet; wherein the connection element comprises two opposite first engaging parts and two opposite second engaging parts to enclose a first central opening; the back plate comprises two opposite first supporting portions and two opposite second supporting portions to enclose a second central opening in vertical alignment with the first opening of the connection element; and wherein the first engaging structures of the connection element comprises two separated first clasps protruding from each of the first engaging parts and located at the first side of the connection element, each of the first supporting portions of the back plate defines two separated first clasping holes, and the two first clasps engage in the corresponding two first clasping holes, respectively.