Auxiliary switch for circuit-breaker and corresponding circuit-breaker

A circuit-breaker including a fuse-holder, an auxiliary switch associated with the fuse-holder, said fuse-holder being mobile between an open and closed position, said auxiliary switch comprising a casing containing at least one contact blade member at least partly mobile, a pivoting and sliding actuator lever for controlling said at least one contact blade member between two positions, including a closed position, in which said at least one contact blade member is in contact with a fixed contact and an open position in which said at least one contact blade member is out of contact with said fixed contact, said actuator lever comprising a lateral actuator pin projecting out of said casing through a slot therein, said slot having a main part and a localized escape lobe located beyond a main part of said slot, said actuator pin being displaceable in the main part and escape lobe of said slot, said actuator pin being in driven engagement with the fuse-holder during at least part of the displacement of the actuator pin in the main part of the slot and out of driven engagement with the engagement means of said fuse-holder when received in the escape lobe of the slot, said casing having an opening on said path, said actuator pin passing through said opening, said cam actuating means including a groove on said fuse-holder for inter-engagement with said actuator pin, said groove having two successive sections offset transversely relative to each other, a first said section opening freely through an outlet at an end of said fuse-holder onto an edge thereof and a second said section having an blind end, an entrainment flat at a junction between said section on a first flank of said groove facing towards said blind end of said second section and drivable by said actuator pin and, on another flank of said groove, between said blind end of said second section and said entrainment flat, a deflector flat facing towards said outlet of said first section and for deflecting said actuator pin.