US Patent 8430615 Securing structure with urged fastener

An exemplary securing structure includes a base, a fastener, and a spring mounted around the fastener. The base defines a securing hole, and two slots located aside the securing hole and communicating with the securing hole. The fastener includes a head, a bolt extending downwardly from the head, and two blocks extending outwardly from an outer periphery of the bolt corresponding to the slots. The bolt is extendable through the securing hole together with the blocks extending through the slots, respectively. The fastener is then rotatable to a position such that the blocks abuts a bottom side of the base. The spring is resiliently compressed between the head of the fastener and a top side of the base.