Abstract: An earphone includes a housing, a speaker unit arranged in the housing, a sound guiding portion disposed on the housing, and a sound guiding tube disposed in the sound guiding portion such that an inner sound guiding channel and an outer sound guiding channel are formed in the sound guiding portion. The sound guiding portion has a sound output hole of the inner sound guiding channel and a sound output hole of the outer sound guiding channel. The sound output hole of the inner sound guiding channel protrudes from the sound output hole of the outer sound guiding channel. The sound waves in the inner sound guiding channel directly pass through the sound output hole of the inner sound guiding channel, and the sound waves in the outer sound guiding channel directly pass through the sound output hole of the outer sound guiding channel.

Abstract: An earphone includes a housing, a speaker unit arranged in the housing, a sound guiding portion disposed on the housing, and a sound guiding tube disposed in the sound guiding portion such that an inner sound guiding channel and an outer sound guiding channel are formed in the sound guiding portion. The sound guiding portion has a sound output hole of the inner sound guiding channel and a sound output hole of the outer sound guiding channel. The sound output hole of the inner sound guiding channel protrudes from the sound output hole of the outer sound guiding channel. The sound waves in the inner sound guiding channel directly pass through the sound output hole of the inner sound guiding channel, and the sound waves in the outer sound guiding channel directly pass through the sound output hole of the outer sound guiding channel.

Abstract: A hard disk drive tray has a casing, a lid, two pivotal arms, and a first lever. The casing has a bottom board, a side, an open end, a closed end, and a rail channel. The rail channel is defined through the bottom board. The lid is pivotally connected with the casing by the pivotal arms and has a resilient member. The resilient member is mounted on a side of the lid and abuts with the hard disk drive when the open end is closed by the lid. The first lever has a first end and a second end. The first end is pivotally connected with one of the pivotal arms. The second end of the first lever is provided with a pushing block that is mounted slidably through the rail channel.

Abstract: A hard disk drive tray has a casing, a lid, two pivotal arms, and a first lever. The casing has a bottom board, a side, an open end, a closed end, and a rail channel. The rail channel is defined through the bottom board. The lid is pivotally connected with the casing by the pivotal arms and has a resilient member. The resilient member is mounted on a side of the lid and abuts with the hard disk drive when the open end is closed by the lid. The first lever has a first end and a second end. The first end is pivotally connected with one of the pivotal arms. The second end of the first lever is provided with a pushing block that is mounted slidably through the rail channel.

Abstract: An electrical charger integrating a business card scanner therein has the functions of charging a personal digital assistant (PDA) and recording a business card. The electrical charger has a casing and a charger body. The casing has an entry, an exit and a cradle mounted on the casing. The cradle has a first through hole and a second through hole. The charger body is mounted inside the casing, and has a charging unit with a power connector, and a scanning unit with a signal connector. The power connector and the signal connector respectively penetrate through the first and second through holes. The business card travels from the entry of the casing to the exit of the casing to be scanned by the scanner integrated in the electrical charger.

Abstract: An electrical charger integrating a business card scanner therein has the functions of charging a personal digital assistant (PDA) and recording a business card. The electrical charger has a casing and a charger body. The casing has an entry, an exit and a cradle mounted on the casing. The cradle has a first through hole and a second through hole. The charger body is mounted inside the casing, and has a charging unit with a power connector, and a scanning unit with a signal connector. The power connector and the signal connector respectively penetrate through the first and second through holes. The business card travels from the entry of the casing to the exit of the casing to be scanned by the scanner integrated in the electrical charger.