Abstract: A single free-end wire reel includes a leveled area disposed on a rotary member to level arc tracks and a gap formed at the intersection of the arc tracks to change the motion track of a limit block. The present invention not only keeps the limit block to have a dual-positioning function when doing a circular motion but also controls the length of a wire exactly, providing a smooth operation when extending or extracting the wire.

Abstract: A single pull wire winding device comprises a wire winding reel; the wire winding reel has two recesses respectively on both surfaces thereof for containing a flexible printed board and a coil spring, the wire winding reel having a peripheral groove on its periphery for containing a power connection wire, and a bulkhead on one side of the peripheral groove has at least one stopping portion; a switch is provided within the containing groove along a tangential direction of the wire winding reel so that the stopping block of the switch engages with the stopping portion of the wire winding reel to stop the rotation of the wire winding reel. Thus, the present invention, wherein a flatter flexible printed board is used to substitute for a portion of a thicker power connection wire to reduce the volume of the assembled device, is widely applied to various electronic products.

Abstract: An ear hanger for fixing a transmission line comprises a frame, a first containing section, a second containing section and a third containing section. The frame includes a hook portion and an abutting portion. The hook portion is formed at the upper end of the frame. The abutting portion is formed at the lower end of the frame. The first containing section is shaped along the hook portion and has a first opening. The second containing section is shaped along the abutting portion and has a second opening. The third containing section is shaped along the abutting portion, located between the first containing section, and the third containing section has a third opening. The third opening is opened on the side opposite to the positions where the first opening and the second opening are opened. Thus, the transmission line can be firmly mounted and is not easy to fall off.

Abstract: A single free-end wire reel includes a leveled area disposed on a rotary member to level arc tracks and a gap formed at the intersection of the arc tracks to change the motion track of a limit block. The present invention not only keeps the limit block to have a dual-positioning function when doing a circular motion but also controls the length of a wire exactly, providing a smooth operation when extending or extracting the wire.

Abstract: The present invention is to provide a folding earphone comprising a narrow elongated hollow body having a protruding transmitter unit at one end thereof. The transmitter unit has a speaker and a cable extending from the speaker toward the inside thereof for connecting to an external electronic apparatus, a narrow elongated groove extending outwards from a bottom side to a pivot end thereof. A receiver unit receivable in the narrow elongated groove has a free end mounted with a microphone and a fixed end pivotally coupled to the pivot end of the body, enabling the receiver unit to be turned relative to the body between a non-operative position where the free end is received inside the narrow elongated groove and an operative position where the free end is moved out of the narrow elongated groove.

Abstract: The present invention is to provide a fastening device formed at a cable of an earphone, the fastening device comprising a first half member and a second half member, both of the two members having a clipping end at one end, a holding end at the other end and a central hinge disposed therebetween with a shaft passing therethrough and a spring put on the shaft, the spring having both ends urged against the first half member and the second half member; wherein the first half member further comprises a recess for fitting a receiver of the earphone therein and a fastening element for securing the receiver in the recess.