Abstract:
A range switching earphone includes an earphone housing, a low frequency speaker, a high frequency speaker, a circuit adaptation module, and a control unit. The low frequency speaker, the high frequency speaker, and the circuit adaptation module are in the earphone housing. The circuit adaptation module is electrically connected to the low frequency speaker and the high frequency speaker. The control unit is connected to the circuit adaptation module for switching on or off of the high frequency speaker or for switching filtering modes of a filtering unit in the circuit adaptation module. Therefore, different frequency response can be achieved with the same earphone, thereby satisfying requirements or tastes of users for listening music of different styles or in different circumstances. Thus, both classical music lovers and game players who want to have an immersed sense can all be satisfied by the range switching earphone.

Description:
CROSS-REFERENCES TO RELATED APPLICATIONS 
       [0001]    This non-provisional application claims priority under 35 U.S.C. §119(a) on Patent Application No. 104204732 filed in Taiwan, R.O.C. on 2015 Mar. 27, the entire contents of which are hereby incorporated by reference. 
       BACKGROUND 
       [0002]    1. Technical Field 
         [0003]    The instant disclosure relates to the earphone audio field, and in particular, to an earphone capable of changing a range by switching frequency responses. 
         [0004]    2. Related Art 
         [0005]    In the market, most earphones for consumer electronic products such as mobile phones, tablet computers, and MP3 players are of the moving-coil type. A moving-coil earphone usually includes a vibrating diaphragm, a voice coil and a permanent magnet. The voice coil is located in the permanent magnet. When the voice coil is driven by an electric current, a magnetic field is generated to interact with a magnetic force of the permanent magnet to drive the vibrating diaphragm to vibrate. An audio signal is transmitted to the voice coil through a connection line and is converted into a sound wave to be outputted. 
         [0006]    Considering the general purpose and the cost, a moving-coil earphone with a single vibrating diaphragm is usually adopted. The general purpose earphone has an advantage of a wider frequency band but has a common disadvantage of a poor resolution effect for mid- and high-pitch frequencies. It can be seen from spectral analysis that, a response in a high pitch region is poor so that the location and space sense of the sound and the response cannot be clearly resolved. Although such earphones are generic, users have different preferences of using earphones. For example, someone is accustomed to using the earphone to listen classical music, while someone is accustomed to using the earphone to play games in a mobile phone or a tablet computer. Thus, there is a need for an earphone capable of satisfying various requirements. 
       SUMMARY 
       [0007]    The objective of the instant disclosure is to provide a range switching earphone. According to one embodiment, the range switching earphone comprises an earphone housing, a low frequency speaker, a high frequency speaker, a circuit adaptation module, and a control unit. The low frequency speaker and the high frequency speaker are both disposed in the earphone housing. The circuit adaptation module is electrically connected to the low frequency speaker and the high frequency speaker. The control unit is connected to the circuit adaptation module for controlling turn-on or turn-off of the high frequency speaker. 
         [0008]    In an embodiment, the circuit adaptation module includes a switch unit and a signal receiving unit. The signal receiving unit is electrically connected to the switch unit and the control unit. The control unit is capable of being activated to generate a switching signal. The signal receiving unit receives the switching signal and controls turn-on or turn-off of the switch unit, to switch a connection of the circuit adaptation module and the high frequency speaker between an open circuit and a closed circuit. In this manner, the turn-on or turn-off of the switch unit is controlled by an electrical signal. 
         [0009]    In an embodiment, the circuit adaptation module includes a switch unit The switch unit is connected to the control unit. The control unit controls turn-on or turn-off of the switch unit, to switch a connection of the circuit adaptation module and the high frequency speaker between an open circuit and a closed circuit. In this manner, the turn-on or turn-off of the switch unit is controlled mechanically. 
         [0010]    In an embodiment, the control unit is disposed on a control bar. The control bar is disposed on a connection line and the connection line is further connected to the circuit adaptation module. In another embodiment, the control unit is disposed on the earphone housing. 
         [0011]    Another objective of the instant disclosure is to provide a range switching earphone. In one embodiment, the range switching earphone comprises an earphone housing, a low frequency speaker, a high frequency speaker, a circuit adaptation module, and a control unit. The low frequency speaker and the high frequency speaker are both disposed in the earphone housing. The circuit adaptation module is electrically connected to the low frequency speaker and the high frequency speaker, and the circuit adaptation module includes a filtering unit. The filtering unit has a filtering mode and a non-filtering mode. The control unit is connected to the filtering unit for selectively controlling the filtering unit to be in the filtering mode or the non-filtering mode. 
         [0012]    In an embodiment, the control unit is electrically connected to the filtering unit through a signal control unit and controls the filtering unit to be in the filtering mode or the non-filtering mode through an electrical signal. In another embodiment, the control unit is connected to the filtering unit and mechanically controls the filtering unit to be in the filtering mode or the non-filtering mode. 
         [0013]    The objective of the range switching earphone of the embodiment is to provide a user with switching selection, for controlling turn-on or turn-off of the high frequency speaker or controlling the filtering unit to be in the filtering mode or the non-filtering mode, thereby adjusting the frequency range or range extent. Therefore, different frequency response can be achieved with the same earphone, thereby satisfying requirements or tastes of users for listening music of different styles or in different circumstances. Therefore, classical music lovers who desire to have a good effect of full-voice-frequency resolution and game players who desire to have improved immersed sense through low frequencies can all be satisfied by the range switching earphone of the present invention. 
     
    
     
       BRIEF DESCRIPTION OF DRAWINGS 
         [0014]      FIG. 1  illustrates an exploded view of a range switching earphone according to a first embodiment of the instant disclosure. 
           [0015]      FIG. 2  illustrates an exploded view of a range switching earphone according to a second embodiment of the instant disclosure. 
           [0016]      FIG. 3  is a schematic diagram of units of the range switching earphone according to the first embodiment of the instant disclosure. 
           [0017]      FIG. 4  is a schematic diagram of units of the range switching earphone according to the second embodiment of the instant disclosure. 
           [0018]      FIG. 5  is a schematic diagram of units of a range switching earphone according to a third embodiment of the instant disclosure. 
           [0019]      FIG. 6  is a schematic diagram of units of a range switching earphone according to a fourth embodiment of the instant disclosure. 
       
    
    
     DETAILED DESCRIPTION 
       [0020]    Referring to  FIG. 1 , an exploded view of a range switching earphone according to a first embodiment of the instant disclosure is shown. As shown in  FIG. 1 , the range switching earphone  1  according to the first embodiment of the instant disclosure comprises an earphone housing  10 , a high frequency speaker  30 , a low frequency speaker  40 , a circuit adaptation module  50 , and a control unit  60 . 
         [0021]    As shown in the embodiment in  FIG. 1 , the earphone housing  10  includes a first housing  11  and a second housing  13 . The first housing  11  is combined with the second housing  13  to form an accommodation space therebetween. The first housing  11  is formed with an in-ear portion  111  to correspond to an ear canal of a wearer. The in-ear portion  111  may be provided with voice emitting holes (not shown) for the sound to penetrate. However, the form of the above earphone housing is only intended for exemplary illustration but not for limitation. 
         [0022]    The high frequency speaker  30  and the low frequency speaker  40  are both disposed in the earphone housing  10  and electrically connected to the circuit adaptation module  50 . In this embodiment, the high frequency speaker  30  and the low frequency speaker  40  may be disposed in the accommodation space between the first housing  11  and the second housing  13  by a holder  20 . The holder  20  may be connected to the first housing  11  or the second housing  13  in a manner that an outer wall of the holder  20  is engaged with the first housing  11  or the second housing  13 , a tenon on the first housing  11  or the second housing  13  is used for engaging, or a thread of the holder  20  is screwed with a thread of the first housing  11  or the second housing  13 . The above description is only intended for exemplary illustration but not for limitation. 
         [0023]    The low frequency speaker  40  is connected to a first side  21  of the holder  20  and electrically connected to the circuit adaptation module  50 . When the circuit adaptation module  50  is driven by an electrical signal, the low frequency speaker  40  is actuated to vibrate to generate a sound wave. The low frequency speaker  40  is a moving-coil loudspeaker or a moving-iron loudspeaker. The high frequency speaker  30  is connected to a second side  23  of the holder  20 , where the second side  23  is opposite to the first side  21  and faces the first housing  11 . The high frequency speaker  30  is electrically connected to the circuit adaptation module  50 . When the circuit adaptation module  50  is driven by an electrical signal, the high frequency speaker  30  is actuated to vibrate to generate a sound wave. Further, the high frequency speaker  30  is connected to the second side  23  of the holder  20  through an adhesive sheet  80 . 
         [0024]    Generally, the high frequency speaker  30  may be implemented as a piezoelectric ceramic loudspeaker. As shown in  FIG. 1 , the high frequency speaker  30  may be of a disc-like shape, and voice penetrating holes  31  arranged annularly are provided in the high frequency speaker  30  so that a voice wave generated by the low frequency speaker  40  can penetrate outwards. 
         [0025]    The circuit adaptation module  50  is electrically connected to the low frequency speaker  40 , the high frequency speaker  30  and a connection line L, and after receiving an audio signal from an external connection, converts the audio signal into an electrical signal to actuate the low frequency speaker  40  and the high frequency speaker  30 . Further, the connection line L may be fixed by passing through an opening  131  of the second housing  13 . 
         [0026]    The control unit  60  of the range switching earphone  1  according to the first embodiment of the instant disclosure is disposed on a control bar  70 . The control bar  70  is disposed on the connection line L and the connection line L is further electrically connected to the circuit adaptation module  50 . In this embodiment, the control unit  60  is implemented as a push switch. When the control unit is pushed, a closed or open circuit between the circuit adaptation module  50  and the high frequency speaker  30  is controlled, to control turn-on or turn-off of the high frequency speaker  30 . Further, the control unit  60  may also be implemented as a step/stepless push switch, a micro switch, a dip switch, a slide switch, or a touch switch. The above description is only intended for exemplification but not for limitation. 
         [0027]    Referring to  FIG. 2 , an exploded view of a range switching earphone according to a second embodiment of the instant disclosure is shown. As shown in  FIG. 2 , the range switching earphone  2  according to the second embodiment of the instant disclosure has a similar structure as that according to the first embodiment, except that the disposing manner of the control unit  60  is different. The control unit  60  of the range switching earphone  2  according to the second embodiment of the instant disclosure is disposed on the earphone housing  10  and more specifically, on the second housing  13 , and is electrically connected to the circuit adaptation module  50  and the high frequency speaker  30 . As such, a user can wear the range switching earphone  2  and push an outer side of the earphone housing with a finger to achieve the effect of switching the high frequency speaker. 
         [0028]    Referring to  FIG. 3  to  FIG. 6 , schematic diagrams of units of range switching earphones according to the first embodiment to a fourth embodiment of the instant disclosure are shown. As shown in  FIG. 3  to  FIG. 6 , the range switching earphone according to the instant disclosure simply presents a relationship among a circuit adaptation module  50 , a high frequency speaker  30 , a low frequency speaker  40 , and a control unit  60  in a unit structure. The circuit adaptation module  50  may be actually implemented as a printed circuit board, which is driven by being connected to an external signal source (not shown) through the connection L to actuate the high frequency speaker  30  and/or the low frequency speaker  40 . 
         [0029]    As shown in  FIG. 3 , based on the structure in the embodiment in  FIG. 1 , the circuit adaptation module  50  includes a switch unit  51  and a signal receiving unit  57 , where open or close of the switch unit  51  is controlled through an electrical signal. The signal receiving unit  57  is electrically connected to the control unit  60  and the switch unit  51 . When the control unit  60  is pushed or toggled, a switching signal is generated. The signal receiving unit  57  receives the switching signal and controls turn-on or turn-off of the switch unit  51 , to switch a connection of the circuit adaptation module  50  and the high frequency speaker  30  between an open and closed circuit. Moreover, the circuit adaptation module  50  further includes a first filtering unit  53  and a second filtering unit  55 , where the first filtering unit  53  is electrically connected to the high frequency speaker  30  and the second filtering unit  55  is electrically connected to the low frequency speaker  40 . The first filtering unit  53  and the second filtering unit  55  may be high-pass filters or low-pass filters, to filter certain frequency wave bands. The first filtering unit  53  and the second filtering unit  55  may be implemented as a resistance-capacitance (RC) circuit, a resistance-inductance (RL) circuit, or a resistance-inductance-capacitance (RLC) circuit. 
         [0030]    As shown in  FIG. 4 , based on the structure in the embodiment in  FIG. 2 , the switch unit  51  is controlled mechanically. The switch unit  51  may be directly connected to the control unit  60 . The control unit  60  is pushed or toggled to control turn-on or turn-off of the switch unit  51 , to control a connection of the circuit adaptation module  50  and the high frequency speaker  30  between an open and closed circuit. When the high frequency speaker  30  is turned on, responses in mid and high frequency regions can be complemented, thereby achieving the effects of a wider range and a high resolution. The resolution of the whole sound can be improved, thereby satisfying users liking classical music or accustomed to listening music from a certain musical instrument. Meanwhile, the control unit  60  is switched in a pushing manner so that the low frequency speaker  40  is turned on while the high frequency speaker  30  is turned off. In this case, the mid and high frequencies are reduced, the range is narrowed, and a low pitch is enhanced in an instant auditory effect, thereby satisfying requirements of game players. 
         [0031]    As shown in  FIG. 5 , the structure in the third embodiment corresponds to the structure in the embodiment in  FIG. 1 . However, the adaptation manner is different from that in the first embodiment and the second embodiment. The circuit adaptation module  50  includes a first filtering unit  53 , a second filtering unit  55 , and a signal receiving unit  57 . The first filtering unit  53  and the second filtering unit  55  are connected to the high frequency speaker  30  and the low frequency speaker  40  respectively. The first filtering unit  53  has a filtering mode and a non-filtering mode. The signal receiving unit  57  is electrically connected to the control unit  60  and the first filtering unit  53 . When the control unit  60  is pushed or toggled, a switching signal is generated. The signal receiving unit  57  receives the switching signal and controls the first filtering unit  53  to switch between the filtering mode and the non-filtering mode. For example, when the first filtering unit  53  is originally in the filtering mode, after receiving the switching signal, the signal receiving unit  57  controls the first filtering unit  53  to be in the non-filtering mode. In this manner, open or close of a connection between the circuit adaptation module  50  and the high frequency speaker  30  is not changed, and instead, a range switching effect is achieved by a manner of switching whether to filter a certain voice band through an electrical signal. For example, if the first filtering unit  53  is a high-pass filter, a wave band with low frequencies is filtered in the filtering mode, and not filtered in the non-filtering mode, thereby enhancing the low frequency part. 
         [0032]    As shown in  FIG. 6 , based on the structure in the embodiment in  FIG. 2 , the first filtering unit  53  is controlled mechanically. The first filtering unit  53  may be directly connected to the control unit  60 . The control unit is pushed or toggled to control the first filtering unit  53  to switch between the filtering mode and the non-filtering mode, so as to control whether to filter a certain frequency wave band. The control unit  60  may also be implemented as a step/stepless push switch, a micro switch, a dip switch, a slide switch, or a touch switch. 
         [0033]    The objective of the instant disclosure is to provide a user with switching selection, for controlling turn-on or turn-off of the high frequency speaker or controlling the filtering unit to be in the filtering mode or the non-filtering mode, thereby adjusting the frequency range. Therefore, different frequency response can be achieved with the same earphone, thereby satisfying requirements or tastes of users for listening music of different styles or in different circumstances. 
         [0034]    The preferred embodiments of the instant disclosure are disclosed above, and are not intended to limit the instant disclosure. Any persons skilled in the art can make some changes or modifications without departing from the spirit and scope of the instant disclosure. Therefore, the scope of the instant disclosure should be subject to the claims attached to the specification.