Abstract: A headband structure of a headphone, including a headband assembly and a telescopic adjustment module, is provided. The headband assembly has a steel belt. The steel belt has multiple positioning slots. The telescopic adjustment module includes a fixing base, an elastic sheet, and a positioning ball. The fixing base is slidably disposed to the steel belt. The elastic sheet is disposed to the fixing base, and the elastic sheet has an accommodating groove. The positioning ball is disposed in the accommodating groove, and the positioning ball is located between the steel belt and the elastic sheet. The elastic sheet constantly pushes the positioning ball to keep the positioning ball in contact with the steel belt, and the positioning slots are located on moving paths of the positioning ball.

Abstract: A water-repellent earphone is formed of a main body and a water-repellent breathable member. The main body includes a receiving space for accommodating a speaker. The speaker partitions the receiving space to make a rear chamber. The main body includes a drainage tunnel communication with a first opening and a second opening, both of which are located on an external surface of the main body. The main body further includes a venthole communicating with the drainage tunnel and the rear chamber. The water-repellent breathable member is formed and located at the venthole. In light of the structure mentioned above, the drainage tunnel can help the earphone quickly expel the moisture to prevent the moisture from damage to the speaker and to boost the frequency response and acoustic performance within the low-frequency range.

Abstract: A water-repellent earphone is formed of a main body and a water-repellent breathable member. The main body includes a receiving space for accommodating a speaker. The speaker partitions the receiving space to make a rear chamber. The main body includes a drainage tunnel communication with a first opening and a second opening, both of which are located on an external surface of the main body. The main body further includes a venthole communicating with the drainage tunnel and the rear chamber. The water-repellent breathable member is formed and located at the venthole. In light of the structure mentioned above, the drainage tunnel can help the earphone quickly expel the moisture to prevent the moisture from damage to the speaker and to boost the frequency response and acoustic performance within the low-frequency range.

Abstract: An earphone plug with a mode switching function is presented. The earphone plug includes a terminal and a switching device. The terminal has a plurality of electrodes to transmit signals. The switching device is combined with the terminal, and is capable of switching between a first mode and a second mode, and part of the electrodes of the terminal are electrically connected together, so as to achieve mode switching to perform processing on different transmission signals.

Abstract: An earphone device with a bass adjusting function is provided. The earphone device includes an accommodating portion and an extension segment. The accommodating portion has an inner chamber for accommodating a speaker. The extension segment which is hollow-shaped and has a first space and a second space therein, and the first space is in communication with the inner chamber of the accommodating portion, and when a portion of the extension segment is adjusted from a first position to a second position, the first space, the second space, and the inner chamber of the accommodating portion are in communication, so as to increase a volume of the back chamber of the speaker.

Abstract: An earphone plug with a mode switching function is presented. The earphone plug includes a terminal and a switching device. The terminal has a plurality of electrodes to transmit signals. The switching device is combined with the terminal, and is capable of switching between a first mode and a second mode, and part of the electrodes of the terminal are electrically connected together, so as to achieve mode switching to perform processing on different transmission signals.

Abstract: An earphone device with a bass adjusting function is provided. The earphone device includes an accommodating portion and an extension segment. The accommodating portion has an inner chamber for accommodating a speaker. The extension segment which is hollow-shaped and has a first space and a second space therein, and the first space is in communication with the inner chamber of the accommodating portion, and when a portion of the extension segment is adjusted from a first position to a second position, the first space, the second space, and the inner chamber of the accommodating portion are in communication, so as to increase a volume of the back chamber of the speaker.

Abstract: The present invention discloses a strain relief collar for use with an accessory associated with a mobile device and its method of making. The first step is the making of an outer molded body having an engagement portion with a cutout. The second step is inserting a cord into the outer molded body. The third step is the forming of an inner molded body having a hooking portion extending outward from the periphery thereof and beyond the cutout for engaging with an accessory. The present invention also discloses another strain relief collar for use with another accessory associated with a mobile device and its method of making. The first step is connecting the cord to an electrical component associated with the accessory. The second step is the forming of an inner molded body. The third step is the forming of an outer molded body.

Abstract: A microphone having a first shell with a cavity region is disclosed. A PCB and a sound receiving member are mounted within the cavity region. A brace is disposed over the cavity region having opposite ribs located against two opposite sides of the PCB. A push button is operably mounted on the brace and is adapted to be moveably operated to actuate the PCB ON or OFF.

Abstract: The present invention discloses a strain relief collar for use with an accessory associated with a mobile device and its method of making. The first step is the making of an outer molded body. The second step is inserting a cord into the outer molded body. The third step is the forming of an inner molded body. The present invention also discloses another strain relief collar for use with another accessory associated with a mobile device and its method of making. The first step is connecting the cord to an electrical component associated with the accessory. The second step is the forming of an inner molded body. The third step is the forming of an outer molded body.

Abstract: A collar clip is integrally made of a plastic material by injection molding and is formed of a connection portion, a front plate, and a rear plate. The front plate is connected at one end with the connection portion and is provided at other end with a holding hole. The rear plate is connected at one end with the connection portion and is provided at other end with a protrusion corresponding in location to and engageable with the holding hole, and a retaining portion for retaining the bonding wire of a communication device.