Abstract: A fan blade which includes an open frame, and a flat, thin blade body fastened to the open frame, the open frame having a blade mounting groove on the inside for mounting the blade body, and a coupling head at one end for coupling to a motor shaft, the coupling head being formed of two separated coupling portions detachably connected together by a tongue-and-groove joint so that the two separated coupling portions can be separated from each other for permitting the blade body to be fitted into the blade mounting groove.

Abstract: A car mark emblem display and storage device for protruding the car mark emblem from the car engine hood to a display position or storing and concealing the car mark emblem in the car engine hood to prevent the car mark emblem from being stolen. The display and storage device includes a motor, a guide screw unit actuated by the motor for raising or lowering the car mark emblem, a seat vertically slidable along the guide screw unit for supporting the mark emblem, a limit control unit for controlling the upper and lower limit of the movement of the mark emblem and the action of the motor, a top cover unit also actuated by the motor for adjustably covering or uncovering a passage for the car mark emblem, and a body frame for retaining most of the above-mentioned components.