Mixer connection mechanism convenient to be mounted on countertop

A mixer connection mechanism convenient to be mounted on a countertop, which is provided to be mounted on a countertop of a sink having a mounting hole, comprising a base seat, a locking device, and a screw rod assembly and a position-limiting blocking lever which are arranged between the base seat and the locking device, wherein a surrounding wall is provided around the base seat, and a bottom portion of the surrounding wall is provided with an abutting end for abutting against an upper surface of the countertop of the sink;

• a fixing boss and a mounting passage for a cold water tube and a hot water tube passing through are provided inside the surrounding wall, and the fixing boss is provided with a threaded through hole;
• the locking device comprises a rotating shaft and two locking blocks arranged in parallel with each other, and the rotating shaft is provided with a threaded hole, and an upper end of the screw rod assembly passes through the threaded through hole and a lower end of the screw rod assembly is cooperated with the threaded hole of the rotating shaft, the locking block is rotatably cooperated with the rotating shaft, and when the locking block is in a free state, the locking block is in a horizontal state;
• and
• one end of the position-limiting blocking lever is secured to the base seat, and when the screw rod assembly is rotated, the other end of the positioning-limiting blocking lever abuts against the locking block to limit a circumferential rotation of the locking device, the rotating shaft allows the locking block to move towards the countertop of the sink until the locking block abuts against a lower surface of the countertop the sink.