Move-in-company joy stick having a ball with a weight attached that maintains vertical position during different orientations which functions without a large bottom receiving-seat

A move-in-company style joy stick, comprising in a knob thereof a space formed by a partition plate, a ball added with a weight, a horizontal grating and a vertical grating are placed in said space, said gratings are provided each with a coaxial roller respectively contact said ball in rotation at a position slightly lower than a horizontal central line of said ball, a supporting wheel is provided at a position having an equal angular distance to both said coaxial rollers;

• when said knob of said joy stick is shaken, a vertical central line of said ball added with said weight is always kept in its vertical position, hence said coaxial rollers are rubbed by said ball in rotation, in this way, the required amount of displacement of said horizontal and vertical gratings being shaken is obtained and wherein, said ball added with said weight is provided near the bottom thereof with a central through hole, above a bottom surface of said central through hole, there is said weight of which the position is preferably lower than a horizontal central line of said roller.