Abstract: A speaker box assembly includes two speaker boxes, two line-winding means, a switch, and a power supply unit. Each of the two speaker boxes is provided on its surface with an outlet hole. One of the two speaker boxes is provided on its surface with a connector jack. The two line-winding means are provided in the two speaker boxes respectively. Each of the line-winding means has a line-winding box and an electrical line. The line-winding box is located inside the speaker box. The inner end of the electrical line is connected to the line-winding box, and the outer end of the electrical line is connected to a connector member. The connector member and the electrical line pass through the outlet hole selectively. The connector member in one of the speaker boxes is inserted into the connector jack on the other of the speaker boxes.

Abstract: A speaker assembly includes a speaker body and a resonating box. The speaker body formed by a main portion and a sound-emitting portion. The resonating box is provided within the speaker body. Both ends of the resonating box are connected to the main portion and the sound-emitting portion respectively. The resonating box is formed by connecting a plurality of resonating shells having decreasing widths. The resonating shells are made of rigid materials. Each of the resonating shells is slidingly connected with the adjacent resonating shells, so that the resonating shell is extendable between the main portion and the sound-emitting portion. Via this arrangement, in addition to amplify the music, the speaker assembly has a stress/bass effect to improve the quality of sound.

Abstract: A speaker box assembly includes two speaker boxes, two line-winding means, a switch, and a power supply unit. Each of the two speaker boxes is provided on its surface with an outlet hole. One of the two speaker boxes is provided on its surface with a connector jack. The two line-winding means are provided in the two speaker boxes respectively. Each of the line-winding means has a line-winding box and an electrical line. The line-winding box is located inside the speaker box. The inner end of the electrical line is connected to the line-winding box, and the outer end of the electrical line is connected to a connector member. The connector member and the electrical line pass through the outlet hole selectively. The connector member in one of the speaker boxes is inserted into the connector jack on the other of the speaker boxes.

Abstract: A power adapter includes a housing, a power input portion and a connecting wire. The housing has a reel device mounted therein, and a wire outlet and more than one output portions formed in one side wall. The power input portion is mounted on the housing. A first end of the connecting wire is extended into the housing through the wire outlet and connected with the reel device thereby the connecting wire can be retracted via the reel device, and a second end thereof is connected with an electrical connector which extends out of the wire outlet. Basing on the structure, the connecting wire can be pulled out of the power adapter for use or retracted in the power adapter for collection via the reel device.

Abstract: A data backup transmitter includes a body, a first connecting port and a second connecting port. The first and the second connecting ports are connected to the body. A data backup assembly is electrically connected between the first and the second connecting ports. The data backup assembly has a backup chip for controlling a backup process between the first and the second connecting ports. Thus, the first and second connecting ports are inserted into a computing device and a data-transmitting carrier respectively. A control button is used to control the backup chip to execute the signal transmission and data backup between the computing device and the data-transmitting carrier.

Abstract: A speaker assembly includes a speaker body and a resonating box. The speaker body formed by a main portion and a sound-emitting portion. The resonating box is provided within the speaker body. Both ends of the resonating box are connected to the main portion and the sound-emitting portion respectively. The resonating box is formed by connecting a plurality of resonating shells having decreasing widths. The resonating shells are made of rigid materials. Each of the resonating shells is slidingly connected with the adjacent resonating shells, so that the resonating shell is extendable between the main portion and the sound-emitting portion. Via this arrangement, in addition to amplify the music, the speaker assembly has a stress/bass effect to improve the quality of sound.

Abstract: A power adapter includes a housing, a power input portion and a connecting wire. The housing has a reel device mounted therein, and a wire outlet and more than one output portions formed in one side wall. The power input portion is mounted on the housing. A first end of the connecting wire is extended into the housing through the wire outlet and connected with the reel device thereby the connecting wire can be retracted via the reel device, and a second end thereof is connected with an electrical connector which extends out of the wire outlet. Basing on the structure, the connecting wire can be pulled out of the power adapter for use or retracted in the power adapter for collection via the reel device.

Abstract: A reel device with music play function includes a reel box, a music player and an earphone. The reel box has a shell and a reel element mounted in the shell. The music player is combined with the shell of the reel box. The earphone has a cable electrically connected with the music player and an audio output unit electrically connected with the cable. The reel element can reel in the cable of the earphone. Basing on the above structure, the present invention can provide a music play function and is convenient for carry, use and collection of the cable of the earphone.

Abstract: A transmission cable includes a plurality of transmission wires, an inner covering layer, at least one grounding wire, a conducting layer, and an outer covering layer. The plurality of transmission wires are traverse disposed in parallel to form at least one transmission wire layer. The inner covering layer wraps around the transmission wire layer. The grounding wire is disposed at one side of the inner covering layer. The conducting layer wraps around the inner covering layer and the grounding wire. The grounding wire is electrically connected with the inner surface of the conducting layer. The outer covering layer wraps around the conducting layer and forms a flat shape.

Abstract: A transmission cable includes a plurality of transmission wires, an inner covering layer, at least one grounding wire, a conducting layer, and an outer covering layer. The plurality of transmission wires are traverse disposed in parallel to form at least one transmission wire layer. The inner covering layer wraps around the transmission wire layer. The grounding wire is disposed at one side of the inner covering layer. The conducting layer wraps around the inner covering layer and the grounding wire. The grounding wire is electrically connected with the inner surface of the conducting layer. The outer covering layer wraps around the conducting layer and forms a flat shape. Thereby, the transmission cable can be rolled up, and the ESD protection effect and the electric-magnetic sheltering effect are improved due to electrically connecting the grounding wire with the conducting layer.

Abstract: A microphone structure used for a hand-free device is proposed. It includes a microphone unit having a controller and a clipping unit disposed at a rear side of the microphone unit to make the clipping unit and the microphone unit form a rear clip. The microphone structure can be clipped onto a user's clothing and it can thus be fastened at a proper position. It is favorable for sound reception. Moreover, the microphone structure has a simple structure and a low production cost.

Abstract: A cable winding device of a USB cable adapter is disclosed. The device comprises a case including a spool and a straight groove; a crown shaped rotating mechanism comprising a channel put on the spool, two opposite edge openings, an internal curved trough, a cavity adjacent the curved trough, and an arcuate trough adjacent the cavity; a roller in the straight groove; and a worm spring secured onto the spool. A pulling of a flat cable causes the roller to move toward the arcuate trough with the worm spring being deformed while the roller is sliding. A release of the pulling causes the roller to move in the cavity for locking. A slight pulling of the cable from the locked position clears the roller from the cavity to move in the curved trough with stored energy of the compressed worm spring released for winding the cable.

Abstract: A cable winding device of a USB cable adapter is disclosed. The device comprises a case including a spool and a straight groove; a crown shaped rotating mechanism comprising a channel put on the spool, two opposite edge openings, an internal curved trough, a cavity adjacent the curved trough, and an arcuate trough adjacent the cavity; a roller in the straight groove; and a worm spring secured onto the spool. A pulling of a flat cable causes the roller to move toward the arcuate trough with the worm spring being deformed while the roller is sliding. A release of the pulling causes the roller to move in the cavity for locking. A slight pulling of the cable from the locked position clears the roller from the cavity to move in the curved trough with stored energy of the compressed worm spring released for winding the cable.

Abstract: A remotely controlled door lock for a dog cage is provided. The door lock includes a pair of solenoids connected to a latch bolt, and a main controller which receives a radio frequency control signal from a remote radio transmitter. The main controller decodes the signal and sends it to one of the solenoids to retract the latch bolt from engagement with the cage door, or extend it into engagement therewith.