Abstract: A cooling fan includes a fan housing, a stator mounted in the fan housing and a rotor rotatablely supported by the stator. The stator includes a stator core, an insulating frame attached to the stator core and stator coils wound on the insulating frame and around the stator core. The insulating frame electrically insulates the stator coils from the stator core. The stator core includes a main body and a plurality of claws. Every two neighboring claws define a receiving room therein. The insulating frame includes a bottom portion located at a bottom of the stator core and a plurality of flanges extending upwardly from the bottom portion into the receiving rooms of the stator core, respectively. A height of the flanges is no less than that of the stator core.

Abstract: A detection device for detecting a displacement of a lens unit of an auto-focus lens during focusing includes a bracket having a rotary plate, a seat fixed on an end of the rotary plate, a sensor mounted on an opposite end of the rotary plate, and a driver. During detection, the driver drives the rotary plate into rotation to position the lens unit at a required state and drives the lens unit of the auto-focus lens to focus. The sensor detects the displacement of the lens unit during focusing in the required state. If the detected displacements of the lens unit conform to the standard in all of the required states, the auto-focus lens is deemed acceptable for a further use; otherwise, the auto-focus lens is deemed as being unacceptable.

Abstract: A cooling fan includes a fan housing, a stator mounted in the fan housing and a rotor rotatablely supported by the stator. The stator includes a stator core, an insulating frame attached to the stator core and stator coils wound on the insulating frame and around the stator core. The insulating frame electrically insulates the stator coils from the stator core. The stator core includes a main body and a plurality of claws. Every two neighboring claws define a receiving room therein. The insulating frame includes a bottom portion located at a bottom of the stator core and a plurality of flanges extending upwardly from the bottom portion into the receiving rooms of the stator core, respectively. A height of the flanges is no less than that of the stator core.

Abstract: A cooling fan includes a base, a stator mounted on the base and a rotor rotatablely supported by the stator. A central tube is formed at a central portion of the base for mounting the stator thereon. The rotor includes a hub, a hollow shell, a permanent magnet and a plurality of blades. The hub includes a top wall and a sidewall extending downwardly from an outer periphery of the top wall. The shell is attached to an inner surface of the sidewall of the hub. An annular bottom flange is formed at a bottom end of the shell. The permanent magnet is attached to an inner surface of the shell. The permanent magnet extends to abut directly against a bottom surface of the top wall of the hub.

Abstract: A robot for collecting table tennis balls on the ground includes a body, a rotor mounted at a front of the body, a driving module mounted on the body, and a control device. The body is configured for receiving the picked table tennis balls therein. The driving module drives the body to travel and drives the rotor to rotate for picking up the table tennis balls. The control device is configured for controlling the driving module to drive the robot to travel on the ground along a predetermined route.

Abstract: A robot for collecting table tennis balls on the ground includes a body, a rotor mounted at a front of the body, a driving module mounted on the body, and a control device. The body is configured for receiving the picked table tennis balls therein. The driving module drives the body to travel and drives the rotor to rotate for picking up the table tennis balls. The control device is configured for controlling the driving module to drive the robot to travel on the ground along a predetermined route.