Patent Publication Number: US-2005130697-A1

Title: Dual action selector switch for use with cellular telephones

Description:
BACKGROUND OF THE INVENTION  
      Portability is an often sought after feature in consumer electronics and devices. Just in the past decade, cellular telephones (i.e., cell phones) have shrunk from briefcase sized to roughly the size of a pack of matches while the size and weight of laptop computers have decreased at the same time that performance has been dramatically improved (e.g., typical laptops now include 40 or more gigabytes of memory, 1 or 2 gigabytes of RAM, one or more rewriteable CD/DVD bays and a 1 to 2 gigahertz processor). In portable music systems, boom boxes have been replaced with relatively high fidelity music systems ranging from CD players to 40 gigabyte portables weighing only a few ounces that are capable of storing 10,000 songs or a multitude of audio books. Current portable gaming devices include high resolution, full color graphics, high speed processors, large memory capabilities, mono or multi-channel audio and sophisticated games. Additionally, short distance wireless networking technology (e.g., Bluetooth and IEEE802.11) has started to make significant in-roads into a variety of areas including telephony (e.g., wireless headsets) and computers (e.g., wireless internet connections).  
      Technology convergence is another desirable feature in consumer products. For example, personal digital assistants (PDAs) are available that include such features as a calendar, alarm, memo pad, task list, address book, calculator, e-mail, internet and cellular telephone capabilities. Other examples include cell phones that provide text messaging, cell phones that include camera functionality, PDAs that include electronic games, and PDAs that include a mapping capability.  
      Although convergence in consumer products typically attempts to marry different but compatible technologies in a single device, there have also been attempts using after-market devices to combine the capabilities of individual components. For example, Skullcandy™ currently makes a device that includes a set of earphones (e.g., earbuds or backphones) and a linking device called a LINK™ console. Attached to the LINK™ console is a pair of cables/plugs. One plug is a standard stereo headphone plug and is intended to be plugged into a CD player, MP3 player or other audio device. The other plug is to be plugged into the user&#39;s cell phone. The LINK™ console includes a microphone for use with the cell phone, a volume control that varies the volume of the music from the audio device while having no effect on the volume of the speech from the cell phone, and a function button that can be used to control some functions of the cell phone (e.g., connect/disconnect). The device is designed to allow the user to simultaneously hear speech from the cell phone and music (or other audio programming) from the audio device. If the user only wants to hear speech from the cell phone and not music, when a call is received or the user is attempting to place a call, the cell phone must be engaged (i.e., connected) and the volume of the music must be turned off using the volume control. Requiring the user to perform two operations, namely engaging the phone and turning the volume off on the audio device, is often problematic. For example, the user may receive an important phone call but upon answering the phone may find it difficult or impossible to understand the initial speech of the person placing the call until the volume on the audio source is turned down. Alternately, the user may be performing some activity (e.g., bike riding, driving a car) that makes it difficult to operate a switch. Therefore requiring the user to locate and operate multiple switches in order to receive a call and mute the volume from the audio player can be distracting and in some instances, dangerous.  
      Accordingly, what is needed is an improved system for integrating an audio device and a cellphone. The present invention provides such a system.  
     SUMMARY OF THE INVENTION  
      The present invention provides a controller for use with a cell phone and an audio source such as a CD player, tape player, radio or MP3 player. In use the controller is coupled to the cell phone, audio source and at least one earphone. The controller includes a switch actuator, the switch actuator simultaneously modifying the state or position of a pair of switches, one of which affects the cell phone and the other of which affects the audio source. More specifically, when the switch actuator is in a first position, the cell phone is connected and the audio source is disabled, either by decoupling the audio source from the earphones or muting the audio signal emitted by the audio source. When the switch actuator is in a second position, the cell phone is disconnected and the audio source is enabled. Accordingly during use the user may simultaneously answer his or her cell phone and mute (or disconnect) the audio source. The controller may also include a microphone for use with the cell phone and a volume control, the volume control preferably being interposed between the audio source and the earphones.  
      A further understanding of the nature and advantages of the present invention may be realized by reference to the remaining portions of the specification and the drawings. 
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS  
       FIG. 1  is an illustration of one embodiment of the invention;  
       FIG. 2  is an illustration of an embodiment in which the controller includes a jack for connecting the controller to earphones;  
       FIG. 3  is a close-up of one embodiment of a controller compatible with the embodiments shown in  FIGS. 1 and 2 ;  
       FIG. 4  is an illustration of an embodiment of a controller using a three-position switch;  
       FIG. 5  is a cross-sectional view of an embodiment of a controller using a slide switch, the figure illustrating the mechanical aspects of the simultaneous switching means;  
       FIG. 6  is a cross-sectional view of an embodiment of a controller using a push button switch, the figure illustrating the mechanical aspects of the simultaneous switching means; and  
       FIG. 7  is an illustration of an alternate embodiment of the controller. 
    
    
     DESCRIPTION OF THE SPECIFIC EMBODIMENTS  
       FIG. 1  is an illustration of a preferred embodiment of the invention. System  100  includes at least one earphone  101 . Preferably a pair of earphones  101  is used with the invention, thus allowing the user to listen in stereo. Earphones  101  can be in-the-ear type earphones (e.g., eargels, earbuds) or outside-the-ear type earphones (e.g., headphones, backphones). A device controller  103  is coupled to earphones  101 , for example by hardwiring the earphones to the controller as illustrated in  FIG. 1 . Alternately, an earphone jack input  201  can be included on the controller (i.e., controller  203 ) as illustrated in  FIG. 2 , thus allowing the user to plug his or her own earphones into the controller. There are several advantages to the embodiment shown in  FIG. 2 . First, it allows the earphones to be replaced as needed without replacing the entire system. Second, it allows the user to conveniently match the earphones to the activity (e.g., the inconspicuousness of in-the-ear earphones versus the sound quality of outside-the-ear earphones). Third, it provides the user with greater flexibility, allowing the user to only use the system when desired, even allowing the user to loan the system to others without having to loan the user&#39;s personal earphones.  
      In the preferred embodiment shown in  FIG. 1 , coupled to controller  103  are cables  105  and  107 . At the end of cables  105  and  107  are jacks  109  and  111 , respectively. Jack  109  is designed to be plugged into a compatible cell phone  113 . Due to the differences between cell phones, an adaptor may be required to allow jack  111  to fit the desired cell phone. As such adaptors are well known in the art, further description will not be provided herein. Alternately, system  100  may be one of a plurality of similar systems, each compatible with a specific cell phone manufacturer or a specific cell phone type.  
      Jack  111  is a standard (i.e., universal) stereo headphone jack and is used to connect controller  103  to an audio source  115 . Most portable audio sources (e.g., CD players, tape players, radios, MP3 players, etc.) are compatible with such standard jacks.  
      To add further versatility to the invention, the cell phone connecting cable, the audio source connecting cable or both may be coupled to controller  103  via jacks as illustrated in  FIG. 2 . As shown, cell phone cable  205  includes a jack  207  compatible with an input  209  on controller  203  as well as jack  109  compatible with cell phone  113 . Similarly, audio source cable  211  includes a jack  213  compatible with an input  215  on controller  203  as well as jack  111  compatible with audio source  115 .  
      There are three primary benefits associated with configuring the system to use separable coupling cables such as those illustrated in  FIG. 2 . First, it allows a single controller  203  to be compatible with any cell phone  113  or audio source  115  simply by changing the cable. This is of particular importance given the variations in cell phone inputs employed by different manufacturers as well as the frequency by which many cell phone users replace their cell phones, often with cell phones from a different manufacturer. Second, it allows the user to replace a cable if it becomes worn or otherwise damaged without replacing the entire system. Third, it allows the user to customize their set-up with different length cables depending upon their requirements.  
       FIG. 3  is a close-up of one embodiment of a controller  300 . Although controller  300  is shown with earphone cables as well as cables to connect the controller to both an audio source and a cell phone, it will be understood that the cables can be hardwired to controller  300  as illustrated with system  100 , separably coupled to controller  300  as illustrated with system  200 , or use some combination thereof.  
      Included in controller  300  is a switching means  301 . Although preferably switching means  301  is a slide switch, other switching means such as toggle switches and push button switches can also be used with the invention. As shown, switching means  301  includes a first position  303  and a second position  305 . When switching means  301  is located in the first position as shown, the cell phone is active (i.e., connected) while the audio source is disabled, either by disconnecting the audio source from the earphones or muting the audio signal from the audio source. When switching means  301  is located in the second position as shown in phantom, the audio source is enabled (i.e., connected to the earphones and un-muted) and the cell phone is deactivated (i.e., disconnected). Thus in normal use, switching means  301  would be located in position  305 , thus allowing the user to listen to music from the audio source. When a call is received, the user moves switching means  301  from position  305  to position  303 , thus simultaneously answering the cell phone call and disconnecting (or muting) the audio source.  
      Controller  400  shown in  FIG. 4  is a variation of controller  300 . In this controller switching means  401  can be located in three different positions;  403 ,  405  and  407 . In position  403  the controller operates as controller  300  does in position  303 , i.e., connecting the cell phone and disabling the audio source (e.g., by disconnecting or muting the audio source). In position  407  (shown in phantom) the controller operates as controller  300  does in position  305 , i.e., deactivating or disconnecting the cell phone while simultaneously enabling the audio source (i.e., connecting an un-muted audio signal from the audio source to the earphones). In position  405  (shown in phantom), switching means  401  activates the cell phone and enables the audio source, thus allowing the user to simultaneously listen to music (or other material from the audio source) and use their cell phone. It will be appreciated that the order of positions  403 ,  405  and  407  is irrelevant.  
      Although there are many different ways in which switching means  301  (or switching means  401 ) can be designed, one method using a slide switch is illustrated in  FIG. 5 . As shown, a switch actuator  501  is captured in a housing  503 , housing  503  permitting actuator  501  to move from a first location  505  to a second location  507 . Portions  509  capture switch member  511  of slide switch  513 . As a result, as switch actuator  501  moves from position  505  to position  507 , slide switch  513  also moves from a first position to a second position. Simultaneously with the movement of switch actuator  501  from position  505  to position  507 , a protrusion  515  on actuator  501  causes the depression of push button  517  on switch  519 .  
      It will be appreciated that the invention is not limited to the switching means illustrated in  FIG. 5  and that there are numerous ways of simultaneously actuating two switches that are applicable to the invention. For example, actuator  501  could be used with a pair of slide switches, a pair of push button switches, one or more toggle switches, etc. Similarly, rather than sliding, actuator  501  could be a push button switch, for example as shown in  FIG. 6 . As illustrated, push button  601  is forced to be in an extended position due to the force applied by a spring member  603 . By depressing push button  601 , protrusions  605  and  607  depress corresponding push button switches  609  and  611 , respectively. Preferably a ridge  613  or other means can be used to lock button  601  in the depressed state.  
       FIG. 7  is an illustration of an alternate embodiment of the invention using a controller  701 . As in the prior embodiments, the controller couples a cell phone  113  and an audio source  115  to a set of earphones, allowing the user to select the source coupled to the earphones using a switching means  703 . Additionally this embodiment includes a microphone  705 , microphone  705  being used with cell phone  113  when the cell phone is connected. As the invention can also utilize earphones that incorporate a microphone, not every embodiment of the invention requires microphone  705 . Accordingly, different embodiments may or may not include microphone  705 . Furthermore if the controller is not hardwired to the earphones as illustrated in  FIG. 2 , controller  701  may also include a second switch (not shown) to engage/disengage microphone  705 , thus allowing the user to modify the controller depending upon whether or not the earphones coupled to the controller include a microphone.  
      In at least one embodiment, the controller also includes a means of adjusting the volume (e.g., means  707  on controller  701 ). Means  707  is typically a variable potentiometer and may rotate, slide, or otherwise vary the volume level. Means  707  may be coupled to the audio source, the cell phone, or both. In a preferred embodiment, means  707  is only coupled to the audio source.  
      As will be understood by those familiar with the art, the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. Accordingly, the disclosures and descriptions herein are intended to be illustrative, but not limiting, of the scope of the invention which is set forth in the following claims.