Abstract: An electric fan includes a motor, two blade units, and two engaging units. The motor has a motor shaft that defines an axis and that has two axially opposite end segments. Each of the end segments has an engaging region. The engaging regions of the end segments are disposed at angularly opposite positions relative to the axis. Each of the blade units includes a hub that is sleeved on a respective one of the end segments. Each of the engaging units includes a first engaging member provided on the engaging region of a respective one of the end segments, and a second engaging member provided on the hub of a respective one of the blade units and engaging the first engaging member.

Abstract: An electric fan includes a motor unit, a pair of opposite fan units, a bracket, a stand, and a rotation-enabling mechanism. The motor unit includes a motor having two opposite output shafts, and a motor casing surrounding the motor and having a bottom side that has two opposite end portions. The fan units are coupled respectively to and driven by the output shafts. The bracket has two opposite securing portions respectively secured to the end portions of the bottom side of the motor casing, and a supporting shaft connected to and disposed between the securing portions. The stand is pivotally connected to the supporting shaft. The rotation-enabling mechanism includes a driving unit mounted on the bracket, and a linkage connected pivotally to the stand and driven by the driving unit.

Abstract: An auxiliary directional light device includes left and right auxiliary signal lights that are to be mounted respectively on upper left and right corner portions of a windshield of an automobile, and that are to be operated in synchronization with a main directional lighting unit of the automobile. The construction as such prevents light emitted by left and right headlights of the automobile from obscuring light emitted by the left and right auxiliary signal lights.

Abstract: A heat dissipating fan assembly includes a motor and first and second propellers. The motor has two opposite sides, and first and second shaft sections extending outwardly and respectively from the sides in opposite directions. The first and second propellers are mounted respectively on the first and second shaft sections, and rotate simultaneously to produce air currents at two opposite sides of the fan assembly.