CLAMPING SPRING, CONNECTING ASSEMBLY, AND TERMINAL CLAMP

A clamping spring for clamping a conductor to be connected against a current bar includes: a retaining leg; a clamping leg movable into an open position and into a clamping position; and a locking leg movable into a retaining position and into a releasing position. In the retaining position, the locking leg is retained on an actuating element, and, in the releasing position, the locking leg is released from the actuating element. The locking leg has a pressing surface, by which the locking leg is movable from the retaining position into the releasing position by the conductor. The pressing surface has a portion which is curved in a direction of the clamping leg and on which comprises a first conductor contact surface.