Piercing electrical connector

A piercing electrical connector, comprising a wire end connector, wherein the wire end connector has a wire end body, a wire end terminal disposed on the wire end body, and a wire cover engaged and matched with the wire end body, the wire cover has a wire accommodation hole configured to accommodate an external cable wire, the wire end terminal has a piercing portion, and the piercing portion is configured to pierce an insulating layer of the cable wire of the wire cover so that the wire end terminal is electrically connected to the cable wire;

• wherein the wire cover further has a clasping plate, a clasping arm, and a first clasping head protruding from and formed on the clasping arm, and the clasping plate is provided an engaging hole, wherein the wire end body has a clasping groove, a clasping hole, a protrusion located in the clasping groove, a pre-locking groove and a locking groove in communication with the clasping hole, the pre-locking groove and the locking groove are disposed in a misaligned manner in a length direction of the clasping hole, the clasping groove is configured to accommodate the clasping plate, and the clasping hole is configured to accommodate the clasping arm;
• the first clasping head protrudes into the pre-locking groove, the protrusion is in contact with a free end of the clasping plate, such that the wire cover and the wire end body are pre-assembled together, and the piercing portion does not pierce the cable wire;
• the first clasping head protrudes into the locking groove, and the protrusion protrudes into the engaging hole, so that the wire cover and the wire end body are assembled together, and the piercing portion pierces the insulating layer of the cable wire so that the wire end terminal is electrically connected to the cable wire.