Abstract: A multifunctional portable electronic device includes a housing for containing electronic circuitry of a portable electronic device, a cover, and an operating mechanism. The operating mechanism includes an operating member rotatably mounted in the housing, and an elastic member resisting between the operating member and the housing to provide an elastic force to push one end of the operating member out of the housing.

Abstract: A hinge structure of a foldable electronic device includes a body section and a cover section. The hinge structure includes a hinge sleeve longitudinally defining a slot. An outer surface of the hinge sleeve forms a coarse surface. The hinge sleeve rotatably connects the cover section to the body section. The coarse surface allows the cover section to maintain any of a variety of selectable positions relative to the body section.

Abstract: The present invention is to provide a method to be used on an electronic device, which employs the demultiplexing process to divide the data streams from video file compatible with DVD read/write formats, or video file from several DVD disks; into several independent and separate files; the data streams include audio, video, and subtitle; subsequently, the data streams that include audio, video, and subtitle are subject to the multiplexing process in accordance with UDF 2.50 or UDF 2.60 formats, in order to combine the data streams into a new video file.

Abstract: The present invention provides a bicycle front derailleur mountable to a seat tube of a bicycle frame for fitting a chain around a selected sprocket of a multiple chainwheel by pushing the chain laterally at a portion thereof advancing into engagement with the chainwheel, the front derailleur comprising: a fixed section fixed to a bicycle frame, a chain guide for contacting a chain to shift the chain, and an actuating arm and a linkage rod disposed between and pivotally connected to the fixed section and the chain guide. In the above construction, the present invention has achieved the intended object of providing an improved bicycle front derailleur capable of reliably effecting a change speed operation with the aid of a sufficient restoring force of the return spring and achieving minimized in operation forces required for various change speeds.

Abstract: The present invention provides a bicycle front derailleur mountable to a seat tube of a bicycle frame for fitting a chain around a selected sprocket of a multiple chainwheel by pushing the chain laterally at a portion thereof advancing into engagement with the chainwheel, the front derailleur comprising: a fixed section fixed to a bicycle frame, a chain guide for contacting a chain to shift the chain, and an actuating arm and a linkage rod disposed between and pivotally connected to the fixed section and the chain guide. In the above construction, the present invention has achieved the intended object of providing an improved bicycle front derailleur capable of reliably effecting a change speed operation with the aid of a sufficient restoring force of the return spring and achieving minimized in operation forces required for various change speeds.