Electromagnetic relay capable of externally and manually controlling, turning on, and shutting off electric power

An electromagnetic relay capable of externally and manually controlling, turning on, and shutting off electric power, comprising:

• a casing, having a chassis and a top cover, wherein a slideway is concavely formed on the top cover, and an end of the slideway is communicated with an inner side of the top cover, and the other end of the slideway has a bump, and the cross-section of the bump is T-shaped;
• a push-pull rod, installed to the slideway and movable relative to the top cover, and having an end formed into a force applying portion and the other end formed into a hook portion and passed into the casing, and an open slot being concavely formed on the push-pull rod, and a fitting hole and a sliding hole being formed at the bottom of the open slot and coupled to each other, and the sliding hole being in a regular rectangular shape, and the fitting hole having a size corresponding to the size of the bump, and the sliding hole having a width smaller than that of the fitting hole;
• and
• a relay module, installed in the chassis, and having at least one elastic contact plate assembly and a lever facing the top cover, and the elastic contact plate assembly having at least one fixed contact plate and at least one movable contact plate, and the lever having an end directly or indirectly pushing the movable contact plate and the fixed contact plate to be contacted with or disconnected from each other and the other end engaged securely with the hook portion;
• wherein after the fitting hole of the push-pull rod is sheathed on the bump, the sliding hole can be moved relative to the bump to drive the hook portion to displace in the casing, and after a force is exerted onto the force applying portion, the sliding hole can be moved relative to the position of the bump, so that the hook portion drives the lever to push the elastic contact plate assembly to form an electrical connection or disconnection state.