Abstract: A panel interlocking structure for adjacent panels of knock down, panel-based furniture, comprising interlock assemblies and connecting panels. Each interlock assembly consists one interlock tube, at least two cubical nuts and at least two interlock bolts. To form the interlock assembly, on a predetermined lengthen rectangular face of the interlock tube, via its corresponding predrilled trans-passing holes, fasten a predetermined number of the interlock bolts into the corresponding tread holes of the cubical nuts positioned inside the interlock tube, with each groove end of the interlock bolt positioned outwardly. Each connecting panel consists one cam lock side and two connection ends.

Abstract: A kind of board connecting structure composed of the connected board with baffle plate and side plate, square tube and square nut in the square tube, holes on the square tube surface in corresponding with those on the square nut; and connecting bolt with one threaded end and one recessed end. The connected board is drilled with deep vertical holes at the connecting part, with turn fastener embedded on each hole bottom. Insert the connecting bolt into each deep hole and the turn fastener, and secure the clasp to the recess to conveniently and quickly make the cabinet frame or shelf of any volume, shape and style.