Abstract: The present disclosure provides a dual-lens movement control method, which includes steps as follows. The tracking target is detected through the wide-angle lens, and the final tracking range is calculated; the magnification and the position are determined according to the final tracking range; the separate mode or the alignment mode is determined according to the magnification and the position.

Abstract: A multi-piece wheel frame includes a rim and a disc. The rim includes a barrel, and an outer rim portion protruding outwardly from the barrel. The outer rim portion forms an inclined surface, and a ring edge surface connected to an outer edge of the inclined surface and cooperating with the inclined surface to form an obtuse angle. The disc is fixed to the rim, and includes a disc core, a plurality of spoke portions extending radially outwardly from the disc core, and a reinforced ring portion connected to the spoke portions and fixed to the outer rim portion. The reinforced ring portion abuts against at least one of the inclined surface and the ring edge surface.

Abstract: A module comprises a tray, a mechanical switch, and a linkage system. The tray is configured to receive a circuit board thereon. The mechanical switch is mounted to the tray and movable between an unsecured position and a secured position. The linkage system is mechanically coupled to the mechanical switch, and moves between an unsecured configuration and a secured configuration in response to the mechanical switch moving between the unsecured position and the secured position. When the module is coupled to a computing device and the linkage system is in the secured configuration, the linkage system engages the computing device, such that the module is locked to the computing device. When the module is coupled to the computing device and the linkage system is in the unsecured configuration, the linkage system is disengaged from the computing device, such that the module is unlocked from the computing device.

Abstract: A sound playing system is disclosed. The sound playing system is used for playing sound from a portable media carrier and a personal computer, including a controlling unit and a switching unit. The controlling unit includes an audio signal receiving terminal, a data transmission terminal and a signal switch terminal. The audio signal receiving terminal receives audio signals from the portable media carrier, the data transmission terminal receives data from the personal computer, and the signal switch terminal outputs a switch signal. The switching unit determines a data transmission path according to the switch signal.

Abstract: An audio signal hybrid controlling device is provided. The audio signal hybrid controlling device is used for selecting an audio signal from a plurality of audio signals for an audio output device. The audio signal hybrid controlling device comprises: a USB input terminal for receiving a first audio signal; a portable music carrier receiving terminal for receiving a second audio signal; an audio signal output terminal for outputting an audio signal to the audio output device; and a switching unit for selecting one signal from the first and the second audio signals for the audio signal output terminal.

Abstract: A sound playing system is disclosed. The sound playing system is used for playing sound from a portable media carrier and a personal computer, including a controlling unit and a switching unit. The controlling unit includes an audio signal receiving terminal, a data transmission terminal and a signal switch terminal. The audio signal receiving terminal receives audio signals from the portable media carrier, the data transmission terminal receives data from the personal computer, and the signal switch terminal outputs a switch signal. The switching unit determines a data transmission path according to the switch signal.