Fool-proofing device, electrical connection assembly comprising said improved fool-proofing device and associated assembly method

A fool-proof device for an electrical connection assembly, said connection assembly comprising a first electrical connector (1) having a first body (10) and is intended to be fixed to a panel (P) that accommodates it, and a second electrical connector (2) having a second body (20) and is intended to be connected to said first connector (1), said device comprising:

• a first part (3) and a second part (4) which can be removably coupled via a mechanical link along a main axis (X),
• the first part (3) having a first fool-proof (31) and the second part (4) having a second fool-proof member (41),
• the first part (3) having a first indexing device for taking multiple distinct orientations about said main axis (X) and positioning said first fool-proof member in a single first position about said main axis (X),
• the second part having a second indexing device for taking multiple distinct orientations about said main axis and positioning said second fool-proof member in a single second position about said main axis (X), said second position of the second fool-proof member being chosen so as to allow the second connector to be connected to the first connector,
• the first part (3) having an interlocking securing device for interlockingly securing the first connector (1) to the panel (P) that accommodates it, and the second part (4) having a first interlocking fixing device that are arranged so as to fix said second part (4) to the second connector (2),
• Characterized in that:
• the first part (3) and the second part (4) each have a second complementary mechanical fixing devices that are intended to interact with one another by interlocking when the first connector (1) and the second connector (2) are coupled, the second complementary fixing device having a slot (34) and one or more flexurally deformable tabs (44), each of which ends with a lug (440) and stands out at the top of a wall arranged inside the first fixing device (43) for fixing the second part (4) to its connector (2) while still culminating them, each tab being made on the first part (3) or the second part (4) and the slot (34) being made on the second part (4) or the first part (3), respectively.