Lap joint lock body mechanism

The utility model discloses a lap joint lock body mechanism which comprises a shell, a sliding block, a spring bolt, a rotating sleeve and an adjusting mechanism. The spring bolt is connected with a lock rod arranged in the shell in a sliding mode, the sliding block is arranged in the shell in a sliding mode in the extending direction of the spring bolt, the lock rod is provided with an abutting portion abutting against the sliding block, an elastic piece is arranged between the spring bolt and the shell, and the elastic piece provides elastic force for the abutting portion to abut against the sliding block so that the spring bolt can extend out of the extending opening; the rotating sleeve is rotationally arranged on the shell and provided with a shifting end enabling the spring bolt to retract into the shell and a rotating end arranged outside the shell. The adjusting mechanism comprises an adjusting hole formed in the shell and an adjusting screw connected into the shell in a threaded mode, and the adjusti