Patent ID: 8182226

Claim:
A built-in swing mechanism of a rotary fan, said rotary fan having a main casing, a drive motor with an axle center, and a rotary vane, said drive motor and said rotary vane being driven to generate axially oblique circulating oscillation, said built-in swing mechanism comprising: a ball-and-socket support frame, arranged onto a front wall of the main casing correspondingly to the axle center of the drive motor, said ball-and-socket support frame being provided with a spherical supporting surface and a through-hole located at a center of a spherical supporting surface, said through-hole being in threaded engagement with the axle center of the drive motor; a spherical abut seat, being fastened at a front end of the drive motor and being provided with a spherical abut surface coupled with said spherical supporting surface of the ball-and-socket support frame; a punch hole being placed at the center of said spherical abut surface and being penetrated into said axle center of the drive motor; and a crank linkage element, being assembled between a rear end of the drive motor and a rear wall of the main casing and having a first end driven to enable oscillation of a second end, said second end being assembled at a rotary pivot correspondingly to the rear wall of the main casing.