Bicycle tail lamp

The utility model discloses a bicycle tail lamp, and relates to the technical field of bicycle lamp installation, the bicycle tail lamp comprises a main body and a lamp body inserted in the main body, the main body is provided with a bead ejecting mechanism and a circuit board, the lamp body is provided with a positioning groove for the bead ejecting mechanism to abut against, the bead ejecting mechanism is matched with the positioning groove, and the circuit board is arranged in the positioning groove. When the lamp body is inserted into the main body, the conductive contact of the lamp body abuts against the circuit board so as to conduct the circuit, and the LED lamp has the advantages of being low in cost and accurate and rapid in installation. 本申请公开了一种自行车尾灯，涉及车灯安装技术领域，包括主体和插接在所述主体上的灯体，所述主体上设置有顶珠机构和电路板，所述灯体上设置有用于所述顶珠机构抵持的定位槽，所述顶珠机构与所述定位槽配合，使得所述灯体插接在所述主体上时，所述灯体的导电触头与所述电路板相抵，以将电路导通，本申请具有成本低、安装准确快速的特点。