Patent ID: 8640762

Claim:
A blind slat controller with braking function, comprising: a base seat including a first casing and a second casing corresponding to the first casing, a semi-tubular protrusion being formed on one side of the first casing, another semi-tubular protrusion being formed on one side of the second casing complementary to the semi-tubular protrusion of the first casing, the first and second casings being mated and assembled with each other, whereby the semi-tubular protrusions of the first and second casings together form a cylindrical hub section with a central circular hole on one side of the base seat; a coiled spring fitted around the hub section of the base seat, the coiled spring including multiple turns in adjacency to each other, two ends of the coiled spring being respectively formed with two bent up stop sections; a cord reel having a closed face and an open end, a push body integrally protruding from inner circumference of the open end of the cord reel, a cord hole being formed on drum body of the cord reel in communication with the closed face, two ends of a pull cord being conducted through the cord hole and two perforations of a movable cover board to connect with a pull cord member; a shaft rod having a circular rod section with a thread and a rectangular rod section, the circular rod section being rotatably received in the base seat, the rectangular rod section protruding out of the base seat to insert-connect with the cord reel; and a connection body, which is a cylindrical body with a notch, the connection body being received in the open end of the cord reel with the push body extending into the notch, a rectangular hole being formed on a bottom wall of the cylindrical body, the rectangular rod section of the shaft rod being fitted through the rectangular hole to connect with the connection body, the push body of the cord reel serving to push the stop sections of the coiled spring for twisting/untwisting the coiled spring so as to unbind or bind the hub section of the base seat, whereby the cord reel is permitted to rotate or is braked and prevented from rotating.