A window opener is composed of base, upper cover, worm passing through a hole on the uper cover and fixed between base and upper cover, rockerarm connected to top end of worm, the second rotary push-pull rod and worm gear engaged with said worm, the first push-pull rod connected to the second one via rotary axle and gear engaged with said worm gear, and the third push-pull rod pivoted to the front end of the second one. Spinning said rockerarm can open or close a window. Its advantage is easy operation. |