Patent ID: 8230611

Claim:
A straight edge clamping device comprising: a front section comprising a connecting end and first and second elongated hollow portions disposed in a direction of length thereof; a rear section comprising a connecting end and first and second elongated hollow portions disposed in a direction of length thereof; a first connection lock configured to be fit into the connecting ends of the first elongated hollow portions of the front and rear sections; and a second connection lock configured to be fit into the connecting ends of the second elongated hollow portions of the front and rear sections, wherein the first and second connection locks fit into the connecting ends of the first and second elongated hollow portions of the front and rear sections so as to connect and lock the front section with the rear section securely, wherein each of the first and second connection locks comprises: an outer surface fitting substantially tightly to at least a part of inner surface of the elongated hollow portion and extending in a direction of length thereof; and an inner groove recessed inward from the outer surface and extending in a direction of length thereof so as to provide rigidity against bending, shearing, or straining force on the straight edge clamping device.