Plug-in relay

A plug-in relay, comprising:

• a base;
• an outer cover covering the base to define an accommodation space defined between the base and the outer cover;
• a wire wheel, located on and abutted to the base, having an accommodation slot and a plurality of wire wheel terminals, and the plurality of wire wheel terminals partially passing through the base;
• a ferrite core arranged in the accommodation slot;
• an enameled wire wound around an outer surface of the wire wheel for wrapping the ferrite core therein, and the enameled wire being electrically coupled to the plurality of wire wheel terminals;
• a stand installed on the base and arranged on a side of the wire wheel;
• a magnetic pole, being an L-shaped plate, having a first section and a second section, wherein the first section is arranged on a side of the ferrite core, and the second section is provided with an opening;
• a spring plate having a bending section and a fixing section, the bending section passing through the opening and abutting the magnetic pole, the fixing section being fixed to the stand, wherein, after the plurality of wire wheel terminals is electrically conducted, the first section of the magnetic pole is magnetically attracted to abut against the ferrite core, and after the plurality of wire wheel terminals is electrically disconnected, the first section of the magnetic pole moves back to an original position by a resilience of the spring plate, so that the magnetic pole pivots and swings relative to the stand;
• a plug fixed to the second section of the magnetic pole;
• a common terminal fixed in the accommodation space;
• a middle elastic plate with an end fixed to the common terminal and another end movably pressed and sheathed by the plug, wherein the middle elastic plate has two movable contacts;
• and
• two normally open terminals fixed on and passed through the base, each of the two normally open terminals having a fixed contact, and the fixed contact located at a position corresponding to the two movable contacts respectively.