Elastic clamp, contact rail assembly, and PV assembly junction box having the assembly

A clamp for electrically connecting a contact rail and a bus bar of a photovoltaic assembly comprising:

• a base having a first surface and a second surface opposite to the first surface, and having a first end and a second end opposite to the first end;
• two fixing portions extending from both sides of the base and away from and substantially perpendicular to the first surface, the fixing portions being adapted to detachably fix the clamp to the contact rail;
• an extending portion having:
• a first bending extension extending and bent from the first end of the base;
• a parallel extension connected with the first bending extension and extending substantially in parallel with and spaced apart from the first surface;
• a second bending extension connected with the parallel extension and bent to extend between the two fixing portions towards the base;
• and an actuating extension connected with the second bending extension and extending beyond the base, the actuating extension being provided with a first locating element and a second locating element;
• and
• a locating protrusion formed integrally at the second end of the base, being engageable with the first locating element to define a released state, and being engageable with the second locating element to define a locked state for holding the bus bar.