Abstract: An antenna is embedded in a mobile phone and comprises a receiving sheet structure, a high frequency radiation part, a low frequency radiation part, and an extending part. The receiving sheet structure comprises a main body and a branch portion, and one end of said branch portion is connected to the main body and another end is connected to a curved part. Therefore one end of the high frequency radiation part is connected to a terminal of the curved part with a curved angle formed thereof, and another end of the high frequency radiation part is an open end and parallel to the branch portion. One end of the low frequency radiation part is connected to the main body, and another end of the low frequency radiation part is an open end. The extending part is connected to a terminal of the receiving sheet structure, and perpendicularly extended to the terminal of the receiving sheet structure.

Abstract: A projector has a case, a zoom lens, a zoom ring, a control plate, a lodging element, a control rod, and a handle. The case has an opening, and the zoom ring is disposed within the case and nearby the opening, the zoom ring is moved back and forth to drive the zoom rod. The control plate is mounted on the case and laid over the opening movably, the lodging element is movably contacted with the control rod, wherein the handle accepts the force along the extending direction of the rectangular opening so as to let the control plate move the lodging element along the extending direction of the rectangular opening and further to move the control rod for continuously regulating the focal length of the zoom lens.