PATENT DOCUMENT

Publication Number: US-11700472-B1
Application Number: US-202017029391-A
Country: US
Kind Code: B1

Title: Wireless charging with master-slave receivers

Abstract:
Electronic apparatuses according to embodiments of the present technology may include an enclosure having a lid. The enclosure may define a first cavity and a second cavity, and may include an enclosure battery. The apparatuses may include a first enclosure wireless charging coil extending about the first cavity. The apparatuses may include a second enclosure wireless charging coil extending about the second cavity. The apparatuses may include a first earbud having a first earbud battery and a first earbud wireless charging coil operably coupleable with the first enclosure wireless charging coil for wireless charging of the first earbud battery. The apparatuses may include a second earbud having a second earbud battery and a second earbud wireless charging coil operably coupleable with the second enclosure wireless charging coil for wireless charging of the second earbud battery.

Claims:
What is claimed is: 
     
       1. An electronic apparatus comprising:
 an enclosure having a lid, wherein the enclosure defines a first cavity and a second cavity within the enclosure, and wherein the enclosure includes an enclosure battery; 
 a first enclosure wireless charging coil incorporated within the enclosure and extending about the first cavity; 
 a second enclosure wireless charging coil incorporated within the enclosure and extending about the second cavity; 
 a first earbud positionable within the first cavity of the enclosure, the first earbud comprising a first earbud battery and a first earbud wireless charging coil, the first earbud wireless charging coil extending concentrically around the first earbud battery and operably coupleable with the first enclosure wireless charging coil for wireless charging of the first earbud battery; and 
 a second earbud positionable within the second cavity of the enclosure, the second earbud comprising a second earbud battery and a second earbud wireless charging coil, the second earbud wireless charging coil extending concentrically around the second earbud battery and operably coupleable with the second enclosure wireless charging coil for wireless charging of the second earbud battery. 
 
     
     
       2. The electronic apparatus of  claim 1 , further comprising a third enclosure wireless charging coil operable to receive wireless power from a wireless power source. 
     
     
       3. The electronic apparatus of  claim 2 , wherein the third enclosure wireless charging coil is electrically coupled with the enclosure battery, and wherein the third enclosure wireless charging coil is configured to provide power received at the third enclosure wireless charging coil to the enclosure battery to charge the enclosure battery. 
     
     
       4. The electronic apparatus of  claim 2 , wherein the first enclosure wireless charging coil and the second enclosure wireless charging coil operate as loads on the third enclosure wireless charging coil when the third enclosure wireless charging coil is receiving wireless power from the wireless power source. 
     
     
       5. The electronic apparatus of  claim 2 , wherein the enclosure battery is configured to provide power to the first enclosure wireless charging coil and the second enclosure wireless charging coil when the third enclosure wireless charging coil is decoupled from the wireless power source. 
     
     
       6. The electronic apparatus of  claim 2 , further comprising:
 an electromagnetic interference (“EMI”) shield within the enclosure and disposed between the third enclosure wireless charging coil and an exterior of the enclosure. 
 
     
     
       7. The electronic apparatus of  claim 1 , wherein the first earbud has a profile having a substantially cylindrical portion within which the first earbud battery is disposed and wherein the second earbud has a profile having a substantially cylindrical portion within which the second earbud battery is disposed. 
     
     
       8. The electronic apparatus of  claim 7 , further comprising:
 a first magnetic conductor positioned between the first earbud battery and the first earbud wireless charging coil, and 
 a second magnetic conductor positioned between the second earbud battery and the second earbud wireless charging coil. 
 
     
     
       9. The electronic apparatus of  claim 7 , wherein, when the first earbud is positioned within the first cavity of the enclosure, the first enclosure wireless charging coil extends concentrically about the first earbud wireless charging coil. 
     
     
       10. A wireless charging system comprising:
 a wireless charger including a charger wireless charging coil; and 
 an electronic apparatus comprising:
 an enclosure defining a first cavity and a second cavity within the enclosure, wherein the enclosure includes an enclosure battery; 
 a first enclosure wireless charging coil incorporated within the enclosure and extending about the first cavity; 
 a second enclosure wireless charging coil incorporated within the enclosure and extending about the second cavity; 
 a third enclosure wireless charging coil incorporated within the enclosure,
 wherein the first enclosure wireless charging coil and the second enclosure wireless charging coil are electrically coupled with the enclosure battery as well as the third enclosure wireless charging coil; 
 
 a first earbud positionable within the first cavity of the enclosure, the first earbud comprising a first earbud battery and a first earbud wireless charging coil, the first earbud wireless charging coil extending concentrically around the first earbud battery and operably coupleable with the first enclosure wireless charging coil for wireless charging; and 
 a second earbud positionable within the second cavity of the enclosure, the second earbud comprising a second earbud battery and a second earbud wireless charging coil, the second earbud wireless charging coil extending concentrically around the second earbud battery and operably coupleable with the second enclosure wireless charging coil for wireless charging. 
 
 
     
     
       11. The wireless charging system of  claim 10 , wherein the third enclosure wireless charging coil is configured to receive wireless power from the wireless charger and provide power to the first enclosure wireless charging coil and the second enclosure wireless charging coil. 
     
     
       12. The wireless charging system of  claim 11 , wherein the third enclosure wireless charging coil is configured to receive wireless power from the wireless charger and provide power to the enclosure battery. 
     
     
       13. The wireless charging system of  claim 12 , wherein the third enclosure wireless charging coil is configured to simultaneously provide power to the first enclosure wireless charging coil, the second enclosure wireless charging coil, and the enclosure battery. 
     
     
       14. The wireless charging system of  claim 10 , wherein the wireless charger further comprises a magnet, wherein the enclosure further comprises a magnet, and wherein the magnet of the wireless charger and the magnet of the enclosure cooperate to provide an alignment of the electronic apparatus with the wireless charger. 
     
     
       15. The wireless charging system of  claim 14 , wherein the magnet of the enclosure is positioned within a central space about which the third enclosure wireless charging coil extends. 
     
     
       16. The wireless charging system of  claim 10 , further comprising an electromagnetic interference (“EMI”) shield within the enclosure and disposed between the third enclosure wireless charging coil and an exterior of the enclosure, wherein when the electronic apparatus is disposed on the wireless charger, the EMI shield is positioned between the charger wireless charging coil and the third enclosure wireless charging coil. 
     
     
       17. The wireless charging system of  claim 10 , wherein the first earbud has a profile having a substantially cylindrical portion within which the first earbud battery is disposed and wherein the second earbud has a profile having a substantially cylindrical portion within which the second earbud battery is disposed. 
     
     
       18. The wireless charging system of  claim 17 , further comprising:
 a first magnetic conductor positioned between the first earbud battery and the first earbud wireless charging coil, and 
 a second magnetic conductor positioned between the second earbud battery and the second earbud wireless charging coil. 
 
     
     
       19. The wireless charging system of  claim 18 , further comprising:
 a third magnetic conductor positioned radially outward from the first enclosure wireless charging coil, and 
 a fourth magnetic conductor positioned radially outward from the second enclosure wireless charging coil. 
 
     
     
       20. An electronic apparatus comprising:
 an enclosure defining a first cavity and a second cavity within the enclosure, wherein the enclosure includes an enclosure battery; 
 a first enclosure wireless charging coil incorporated within the enclosure and extending about the first cavity, wherein the first enclosure wireless charging coil is electrically coupled with the enclosure battery; 
 a first earbud positionable within the first cavity of the enclosure, the first earbud comprising:
 a first earbud battery, and 
 a first earbud wireless charging coil extending concentrically about the first earbud battery, wherein the first earbud wireless charging coil is operably coupleable with the first enclosure wireless charging coil for wireless charging; 
 
 a second enclosure wireless charging coil incorporated within the enclosure and extending about the second cavity, wherein the second enclosure wireless charging coil is electrically coupled with the enclosure battery; 
 a second earbud positionable within the second cavity of the enclosure, the second earbud comprising:
 a second earbud battery, and 
 a second earbud wireless charging coil extending concentrically about the second earbud battery, wherein the second earbud wireless charging coil is operably coupleable with the second enclosure wireless charging coil for wireless charging; 
 
 a first magnetic conductor extending radially about the first enclosure wireless charging coil; and 
 a second magnetic conductor extending radially about the second enclosure wireless charging coil.

Description:
CROSS-REFERENCES TO RELATED APPLICATIONS 
     The present application claims the benefit of priority to U.S. Provisional Application No. 62/905,682, filed Sep. 25, 2019, the contents of which are hereby incorporated by reference in their entirety for all purposes. 
    
    
     TECHNICAL FIELD 
     The present technology relates to wireless charging systems. More specifically, the present technology relates to wireless charging system configurations, components, and characteristics. 
     BACKGROUND 
     Wireless charging is useful for a variety of devices. As electronic devices in which wireless charging components are housed reduce in size, the available space for materials may be limited, which may affect operational performance. 
     SUMMARY 
     Electronic apparatuses according to embodiments of the present technology may include an enclosure having a lid. The enclosure may define a first cavity and a second cavity within the enclosure, and the enclosure may include an enclosure battery. The apparatuses may include a first enclosure wireless charging coil incorporated within the enclosure and extending about the first cavity. The apparatuses may include a second enclosure wireless charging coil incorporated within the enclosure and extending about the second cavity. The apparatuses may include a first earbud positionable within the first cavity of the enclosure. The first earbud may include a first earbud battery and a first earbud wireless charging coil operably coupleable with the first enclosure wireless charging coil for wireless charging of the first earbud battery. The apparatuses may include a second earbud positionable within the second cavity of the enclosure. The second earbud may include a second earbud battery and a second earbud wireless charging coil operably coupleable with the second enclosure wireless charging coil for wireless charging of the second earbud battery. 
     In some embodiments, the apparatuses may include a third enclosure wireless charging coil operable to receive wireless power from a wireless power source. The third enclosure wireless charging coil may be electrically coupled with the enclosure battery. The third enclosure wireless charging coil may be configured to provide power received at the third enclosure wireless charging coil to the enclosure battery to charge the enclosure battery. The first enclosure wireless charging coil and the second enclosure wireless charging coil may operate as loads on the third enclosure wireless charging coil when the third enclosure wireless charging coil may be receiving wireless power from the wireless power source. The enclosure battery may be configured to provide power to the first enclosure wireless charging coil and the second enclosure wireless charging coil when the third enclosure wireless charging coil may be decoupled from the wireless power source. 
     The apparatuses may include an electromagnetic interference (“EMI”) shield within the enclosure and disposed between the third enclosure wireless charging coil and an exterior of the enclosure. The first earbud may be characterized by a profile having a substantially cylindrical portion within which the first earbud battery may be disposed. The first earbud wireless charging coil may extend concentrically about the first earbud battery. The second earbud may be characterized by a profile having a substantially cylindrical portion within which the second earbud battery may be disposed. The second earbud wireless charging coil may extend concentrically about the second earbud battery. The apparatuses may include a first magnetic conductor positioned between the first earbud battery and the first earbud wireless charging coil. The apparatuses may include a second magnetic conductor positioned between the second earbud battery and the second earbud wireless charging coil. When the first earbud may be positioned within the first cavity of the enclosure, the first enclosure wireless charging coil may extend concentrically about the first earbud wireless charging coil. 
     Some embodiments of the present technology may encompass wireless charging systems. The systems may include a wireless charger including a charger wireless charging coil. The systems may include an electronic apparatus. The apparatus may include an enclosure defining a first cavity and a second cavity within the enclosure. The enclosure may include an enclosure battery. The apparatus may include a first enclosure wireless charging coil incorporated within the enclosure and extending about the first cavity. The apparatus may include a second enclosure wireless charging coil incorporated within the enclosure and extending about the second cavity. The apparatus may include a third enclosure wireless charging coil incorporated within the enclosure. The first enclosure wireless charging coil and the second enclosure wireless charging coil may be electrically coupled with the enclosure battery as well as the third enclosure wireless charging coil. The apparatus may include a first earbud positionable within the first cavity of the enclosure. The first earbud may include a first earbud battery and a first earbud wireless charging coil operably coupleable with the first enclosure wireless charging coil for wireless charging. The apparatus may include a second earbud positionable within the second cavity of the enclosure. The second earbud may include a second earbud battery and a second earbud wireless charging coil operably coupleable with the second enclosure wireless charging coil for wireless charging. 
     The third enclosure wireless charging coil may be configured to receive wireless power from the wireless charger and provide power to the first enclosure wireless charging coil and the second enclosure wireless charging coil. The third enclosure wireless charging coil may be configured to receive wireless power from the wireless charger and provide power to the enclosure battery. The third enclosure wireless charging coil may be configured to simultaneously provide power to the first enclosure wireless charging coil, the second enclosure wireless charging coil, and the enclosure battery. The wireless charger may also include a magnet. The enclosure may also include a magnet. The magnet of the wireless charger and the magnet of the enclosure may cooperate to provide an alignment of the electronic apparatus with the wireless charger. The magnet of the enclosure may be positioned within a central space about which the third enclosure wireless charging coil extends. The systems may include an electromagnetic interference (“EMI”) shield within the enclosure and disposed between the third enclosure wireless charging coil and an exterior of the enclosure. When the electronic apparatus may be disposed on the wireless charger, the EMI shield may be positioned between the charger wireless charging coil and the third enclosure wireless charging coil. 
     The first earbud may be characterized by a profile having a substantially cylindrical portion within which the first earbud battery is disposed. The first earbud wireless charging coil may extend concentrically about the first earbud battery. The second earbud may be characterized by a profile having a substantially cylindrical portion within which the second earbud battery is disposed. The second earbud wireless charging coil may extend concentrically about the second earbud battery. The systems may include a first magnetic conductor positioned between the first earbud battery and the first earbud wireless charging coil. The systems may include a second magnetic conductor positioned between the second earbud battery and the second earbud wireless charging coil. The systems may include a third magnetic conductor positioned radially outward from the first enclosure wireless charging coil. The systems may include a fourth magnetic conductor positioned radially outward from the second enclosure wireless charging coil. 
     Some embodiments of the present technology may encompass electronic apparatuses. The apparatuses may include an enclosure defining a first cavity and a second cavity within the enclosure. The enclosure may include an enclosure battery. The apparatuses may include a first enclosure wireless charging coil incorporated within the enclosure and extending about the first cavity. The first enclosure wireless charging coil may be electrically coupled with the enclosure battery. The apparatuses may include a first earbud positionable within the first cavity of the enclosure. The first earbud may include a first earbud battery, and a first earbud wireless charging coil extending concentrically about the first earbud battery. The first earbud wireless charging coil may be operably coupleable with the first enclosure wireless charging coil for wireless charging. The apparatuses may include a second enclosure wireless charging coil incorporated within the enclosure and extending about the second cavity. The second enclosure wireless charging coil may be electrically coupled with the enclosure battery. The apparatuses may include a second earbud positionable within the second cavity of the enclosure. The second earbud may include a second earbud battery, and a second earbud wireless charging coil extending concentrically about the second earbud battery. The second earbud wireless charging coil may be operably coupleable with the second enclosure wireless charging coil for wireless charging. The apparatuses may include a first magnetic conductor extending radially about the first enclosure wireless charging coil. The apparatuses may include a second magnetic conductor extending radially about the second enclosure wireless charging coil. 
     Such technology may provide numerous benefits over conventional technology. For example, the present systems may produce improved charging efficiency, which may reduce charging times. Additionally, components and configurations of the present technology may provide parallel charging of components and a powered enclosure. These and other embodiments, along with many of their advantages and features, are described in more detail in conjunction with the below description and attached figures. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       A further understanding of the nature and advantages of the disclosed embodiments may be realized by reference to the remaining portions of the specification and the drawings. 
         FIG.  1    shows a schematic perspective view of an electronic apparatus according to some embodiments of the present technology. 
         FIG.  2    shows a schematic block diagram of a wireless charging system according to some embodiments of the present technology. 
         FIG.  3 A  shows a schematic cross-sectional view of an electronic apparatus according to some embodiments of the present technology. 
         FIG.  3 B  shows a schematic cross-sectional view of an electronic apparatus according to some embodiments of the present technology. 
         FIG.  4    shows a schematic top planar view of a wireless charger according to some embodiments of the present technology. 
         FIG.  5    shows an exemplary wireless charging system according to some embodiments of the present technology. 
         FIG.  6    shows exemplary circuitry of a portion of a wireless charging system according to some embodiments of the present technology. 
     
    
    
     Several of the figures are included as schematics. It is to be understood that the figures are for illustrative purposes, and are not to be considered of scale unless specifically stated to be of scale. Additionally, as schematics, the figures are provided to aid comprehension and may not include all aspects or information compared to realistic representations, and may include exaggerated material for illustrative purposes. 
     In the figures, similar components and/or features may have the same numerical reference label. Further, various components of the same type may be distinguished by following the reference label by a letter that distinguishes among the similar components and/or features. If only the first numerical reference label is used in the specification, the description is applicable to any one of the similar components and/or features having the same first numerical reference label irrespective of the letter suffix. 
     DETAILED DESCRIPTION 
     Wireless charging is a convenient feature for handheld products and personal devices. By incorporating charging coils in transmission and receiver devices, inductive charging can be performed. The process of wireless charging can have challenges including charging efficiency, which can impact performance and the time to charge the devices. For example, during the charging process, magnetic flux is emitted from both the transmission coil and the receiver coil. In many systems, ferrite or some magnetic material is utilized to facilitate conduction of the flux to improve efficiency of distribution and collection. The ferrite provides this function by conducting the flux and directing it back towards an appropriate coil or coils. 
     Additionally, charging systems can be limited when operating at reduced power. For example, some conventional charging systems may include a battery in a case or enclosure, which may be used to charge batteries in the devices. These batteries may operate in series where charging systems, whether wired or wireless, may pass through the case battery to begin charging the end device in an attempt to limit the time before the device may be used. However, when the case battery is at reduced charge, or substantially depleted, a voltage booster may be incorporated to provide sufficient voltage to the end device. These additional components may reduce overall charging efficiency, which may increase charging time. The present technology overcomes many of these issues by providing parallel charging to both an enclosure battery and a device battery, which may increase the charging efficiency to both batteries. Additionally, the configuration of systems according to some embodiments of the present technology may improve coupling coefficients, which may reduce circuitry or electrical components within the system. 
     Although the remaining portions of the description will routinely reference earbuds or portable listening devices, it will be readily understood by the skilled artisan that the technology is not so limited. The present materials and technology may be employed with any number of electronic devices that may include, without limitation, phones and mobile devices, watches, glasses, and other wearable technology including fitness devices, handheld electronic devices, laptops, tablets, and other computers, as well as other devices that may benefit from the use of wireless charging technology. For example, any number of devices having multiple batteries may benefit from the parallel charging capabilities discussed throughout the present disclosure. It is also to be understood that portable listening devices may include any portable device designed to play sound that can be heard by a user. For example, headphones are one type of portable listening device, and portable speakers are another. Headphones may represent a pair of small, portable listening devices that are designed to be worn on or around the head of a user, and which may convert an electrical signal to a corresponding sound that can be heard by the user. 
     Headphones according to some embodiments of the present technology may include traditional headphones worn by a user, and which may include left and right listening devices connected to one another by a headband, headsets incorporating a microphone, and earbuds designed to be fitted directly within the ear. Headphones may include both over-ear headphones having earbuds that fully encompass the ears, and on-ear headphones having earbuds that press against the ear instead of surrounding the ear. It is to be understood that earbuds according to some embodiments of the present technology may include both headphones that fit within or on the outer ear facing the ear canal, and in-ear headphones that are inserted in the ear canal itself. Accordingly, the description and figures are not intended to limit the style or configuration of earbuds encompassed by the present technology. 
       FIG.  1    shows a simplified plan view of an electronic apparatus  100  including a pair of wireless earbuds according to some embodiments of the present technology. As shown in  FIG.  1   , apparatus  100  may include an enclosure  105  defining one or more cavities  110 , which may seat the earbuds. As illustrated, enclosure  105  may define multiple cavities including cavity  110   a  and cavity  110   b  configured to receive a pair of earbuds  115 , such as earbud  115   a  and earbud  115   b . In some embodiments, cavities  110  can be positioned adjacent one another within the enclosure  105 , and may be isolated cavities as illustrated as well as at least partially joined in some embodiments. Each cavity  110  can be sized and shaped to match that of its respective earbud  115 . Although any profile or configuration of earbuds may be encompassed by the present technology, in some embodiments earbuds  115  may include a stem  116  and a bud  117 . Cavities  110  may at least partially accommodate this profile, and may define a substantially cylindrical portion of the cavity to receive the stem  116  as well as a pocket or cup portion to at least partially receive or seat the bud  117 . 
     As illustrated, first earbud  115   a  may be positionable within first cavity  110   a , where stem  116   a  may be housed in cylindrical portion  118   a , and bud  117   a  may be at least partially seated in cup portion  119   a . Similarly, second earbud  115   b  may be positionable within second cavity  110   b , where stem  116   b  may be housed in cylindrical portion  118   b , and bud  117   b  may be at least partially seated in cup portion  119   b . In some embodiments, stem  116  may be an elongated portion of the ear bud, and may be substantially cylindrical. By substantially is meant a generally cylindrical shape, although the profile of stem  116  may be rounded or modified for functional or aesthetic purposes. A battery may be positioned within stem  116  as will be discussed further below, and wireless charging materials may similarly be included within the apparatus near the stem of the earbuds and the cylindrical portion of the cavities. While the cylindrical portions  118  may be similar between the two cavities, cup portions  119  may extend outwardly from one another, which may limit interaction between the earbuds, and may produce a specified cavity arrangement for each earbud. 
     Electronic apparatus  100  may also include a lid  120  as part of enclosure  105 , which may operate on a hinge as illustrated, or may be otherwise connected with the enclosure. Lid  120  may be operable between a closed position where lid  120  is aligned over one or more cavities  110  fully enclosing earbuds  115  within the housing, and an open position where the lid is displaced from the housing and cavities. In some embodiments, lid  120  may at least partially define the cup portion  119  of the cavities  110 , to fully enclose earbuds  115  when the lid is in the closed position for enclosure  105 . In some embodiments, enclosure  105  may also include a battery  125  configured to charge earbuds  115 , as well as electronic components  127  and circuitry, which may provide any number of features or controls as will be described further below. One or more magnets  130  may also be incorporated within the enclosure, and may be configured to orient and retain the earbuds within the cavities  110 . Additional or alternative features are similarly encompassed by the present technology, and  FIG.  1    is to be understood as illustrating one possible system configuration encompassed by embodiments of the present technology, although it is not intended to limit the technology to any particular configuration. 
       FIG.  2    illustrates a simplified block diagram of a wireless charging system  200  according to some embodiments of the present technology. System  200  may be a block diagram including the components or devices of apparatus  100  described above, and may include any of the components or features noted above. For example, wireless charging system  200  may include earbuds  202   a  and  202   b , an enclosure  204  configured to house and/or charge the earbuds as noted above, and a power source  205  for charging the enclosure. The power source  205  may be a wired connection in some embodiments, such as from mains power, as well as any type of charging platform or device, including a wireless charger in some embodiments. Power source  205  may include a processor  207 , which may facilitate operation of one or more wireless charging coils as will be described further below. 
     Each earbud  202  may include one or more inputs  255 , internal components  260 , and one or more outputs  265 . In some embodiments, the one or more inputs  255  may be or include a microphone input and one or more buttons or sensors that register contact from a user. For example, buttons, switches, or sensors, such as capacitive touch sensors, for example, may facilitate a number of interactions or controls including pairing with an external device, as well as controls or instructions for the earbuds or a paired device. Internal components  260  may include a speaker, a microphone, a rechargeable battery, a processor, wireless charging coils or components, and/or other circuitry and components. Outputs  265  may be audio from a speaker, a light, or other indicator, such as indicating pairing with a device, battery charge level, or other functionality of the earbuds. In some embodiments any of the inputs and/or outputs may include a wireless radio operable to provide and/or receive signals to or from a paired device. Additionally, in some embodiments, earbuds  202  may include an enclosure interface  270 , which may provide coupling with the enclosure  204  in one or more ways. For example, interface  270  may be or include a contact connector operable to receive power or communication from the enclosure  204 , and in some embodiments interface  270  may be or include one or more wireless charging coils that may wirelessly receive power from the enclosure and/or from a power source as will be described further below. 
     Enclosure  204  may include an enclosure processor  210 , an earbud detector  215 , radio  217 , a lid sensor  220 , enclosure charging circuitry  225 , a battery  227 , earbud charging circuitry  230 , as well as any number of additional components or characteristics. Enclosure  204  may also include an earbud interface  245  that enables circuitry within enclosure  204  to communicate with and/or charge earbuds  202 , and a power source interface  250  that may couple the enclosure with power source  205 , such as an AC or DC power source or an inductive charging pad. Power source interface  250  may be part of a receptacle connector, and in some embodiments power interface  250  may be or include a wireless power receiver, such as one or more wireless power receiving coils, which can receive inductive power from power source  205 . Earbud interface  245  may transfer power and/or data between enclosure  204  and the earbuds via enclosure interface  270  in each earbud. Earbud interface  245  may include an electrical connector, or may include a wireless power transmitter, such as a wireless power transmitting coil that can transmit inductive power to an inductive power receiver within the earbuds. As will be explained below, in some embodiments, earbud interface  245  and power source interface  250  may be the same components, such as one or more wireless charging coils, which may be controlled by enclosure processor  210  to receive and/or transmit wireless power. 
     Enclosure processor  210  may be configured to control various functions of enclosure  204 . In some embodiments, earbud detector  215  includes one or more sensors that detect when one or both of earbuds  202  are placed within enclosure  204 . In some embodiments, enclosure processor  210  may communicate with earbuds  202  by sending and receiving data through earbud interface  245  and enclosure interface  270  of either or both earbuds. Enclosure processor  210  may communicate with power source  205  by sending and receiving data through power source interface  250 . That is, in various embodiments earbud interface  245  and power source interface  250  may be capable of carrying both power and data signals for single or bidirectional communication. In some embodiments, enclosure  204  may include a wireless radio  217  that enables the enclosure to transmit and receive data communications with earbuds  202  and a host device, such as or including a smartphone, a tablet computer, a laptop computer, or other devices in addition to, or instead of, relying on data exchange through interfaces  245  and  250 . Lid sensor  220  may detect when a lid to the enclosure is in the open position and when the lid is in the closed position. 
     Enclosure battery  227  may provide power for the circuitry associated with enclosure  204  and may be a rechargeable battery that can be charged by power source  205  and enclosure charging circuitry  225  through power source interface  250 . Enclosure battery  227  may also be coupled with earbud interface  245  and may charge earbuds  202  in conjunction with earbud charging circuitry  230 . In some embodiments, earbud charging circuitry  230  may charge earbuds  202  anytime they are properly stored within cavities  110  even though enclosure  204  may not be coupled with power source  205 . Enclosure processor  210  may additionally be coupled with enclosure charging circuitry  225 , which may control the charging of enclosure battery  227 , such as by controlling the voltage and current supplied to the battery to optimize the speed of charging and the life of the battery. As noted above, in some embodiments earbud interface  245  and power source interface  250  may be the same component, such as wireless charging coils switchable between receiving and transmission modes. Enclosure processor  210  may be configured to switch this combined interface between these modes. For example, when enclosure processor  210  determines that enclosure  204  is seated on a power source  205 , the enclosure processor may switch the combined interface to a receiving mode. Additionally, when enclosure processor  210  determines that enclosure  204  is not positioned near a power source  205 , the enclosure processor may switch the combined interface to a transmission mode to ensure earbuds  202  are receiving charging power. 
     Similarly, in some embodiments enclosure processor  210  may be coupled with earbud charging circuitry  230  to control battery charging for the earbuds  202 . For example, enclosure processor  210  may control the voltage and current supplied to the batteries to optimize the speed of charging and the life of the batteries through earbud interface  245 . Enclosure  204  may include one or more charge indicators  235  that may indicate a charge level of enclosure battery  227  and/or the pair of earbud batteries such that a user may see the indicators on an outer surface of enclosure. In some embodiments enclosure  204  may also include one or more user input devices  240 . Each included input device  240  may be a button or other type of input that, in response to being activated by or otherwise receiving input from a user, generates a signal that may be communicated to processor  210  or other circuitry within enclosure  204 . Any number of other components and configurations may also be incorporated within enclosure  204  or earbuds  202 , and are similarly encompassed by the present technology. 
       FIG.  3 A  shows a simplified schematic cross-sectional view of an electronic apparatus  300  according to some embodiments of the present technology. It is to be understood that electronic apparatus  300  is included merely to illustrate certain components according to some embodiments of the present technology, and is not intended to accurately represent either scale or position of components that may be incorporated in the apparatus. Electronic apparatus  300  may provide an exemplary cross-section of electronic apparatus  100  or components of wireless charging system  200 , where electronic apparatus  300  may be earbuds or additional devices according to some embodiments of the present technology. For example, electronic apparatus  300  may include an enclosure  302  having a lid  303 , and in which an enclosure battery  304  may be housed. Within enclosure  302  may be any number of additional components as discussed above, such as with enclosure  204 , and which may include a processing unit providing or facilitating any of the functionality described throughout the present disclosure. 
     Battery  304  may be or include a rechargeable battery, including any number of rechargeable battery cells. Battery  304  may be a lithium-ion or other secondary battery type, and may be coupled with recharging circuitry and controllers operable to control charging and discharging operations. Enclosure  302  may define one or more cavities  305 , such as two cavities as illustrated,  305   a ,  305   b , within which earbuds  310   a ,  310   b  may be seated. The apparatus may also include a number of enclosure wireless charging coils which may be operated in a number of ways. 
     A first wireless charging coil  306   a  may extend about first cavity  305   a , and a second wireless charging coil  306   b  may extend about second cavity  305   b . A third wireless charging coil  307  may also be incorporated within the enclosure  302 , and may be configured to receive wireless power from a wireless power source or charger. Third wireless charging coil  307  may be electrically coupled with enclosure battery  304 , which may be coupled with the coil via additional components or circuitry in some embodiments, which may include rectifiers, Buck units, or other components. When receiving wireless power, third wireless charging coil  307  may charge or recharge battery  304 . Third wireless charging coil  307  may also be electrically coupled with first wireless charging coil  306   a  and second wireless charging coil  306   b  in some embodiments. 
     First wireless charging coil  306   a  and second wireless charging coil  306   b  may be transmission wireless charging coils that may be operated to wirelessly charge or provide wireless power to receiving coils associated with the earbud batteries as will be described below. Third wireless charging coil  307  may be a receiving wireless charging coil, where first wireless charging coil and second wireless charging coil are coupled as a load to the third wireless charging coil. Consequently, first wireless charging coil  306   a  and second wireless charging coil  306   b  may be operating in parallel with third wireless charging coil  307  to simultaneously charge each earbud battery as well as enclosure battery  304 . These configurations will be described in further detail below. When not receiving wireless power, third wireless charging coil  307  may be disengaged, and battery  304  may provide power to first wireless charging coil  306   a  and second wireless charging coil  306   b  for charging batteries of the earbuds. 
     As illustrated, the wireless charging coils  306  may extend about the cavities  305 , and may extend about the cylindrical portions of the cavities as previously described. Wireless charging coils  306  may be positioned in a number of locations in embodiments of the present technology. For example, wireless charging coils  306  may line the cavities  305 , or may be embedded within the enclosure  302 , while extending about the cavities as illustrated. Earbuds  310  may include any of the features or characteristics described previously. For example, earbuds  310  may include a battery  312  positioned within a stem of the earbud  310 . A magnetic conductor material  314  may extend about the cavity, and may affect magnetic flux directed towards the earbuds in order to increase flux density received by wireless charging coils  316 . Wireless charging coils  316  may be included within earbuds  310 , and may operate to receive wireless power transmitted from wireless charging coils  306  of enclosure  302 , which may receive power from either third wireless charging coil  307  or battery  304  of the enclosure  302 . Electronic apparatus  300  may also include a magnet  320 , which may be used to couple the apparatus with a wireless charger in some embodiments as will be further described below. 
     Earbud battery  312  may be or include a rechargeable battery, including any number of rechargeable battery cells. Battery  312  may also be a lithium-ion or other secondary battery type, and may be coupled with recharging circuitry and controllers operable to control charging and discharging operations, such as a processor within earbuds  310 . For example, battery  312   a  may be electrically coupled with wireless charging coil  316   a , and battery  312   b  may be electrically coupled with wireless charging coil  316   b , which may individually charge the associated battery within each earbud. Again, the coils may be coupled with batteries via additional components as noted above. Wireless charging coils  316  may receive wireless charging power from enclosure wireless charging coils  306 , which may be configured to operate in a transmission mode, and coils  316  may include circuitry for providing wireless power to recharge batteries  312 . As discussed above, a processing unit may facilitate these operations and any configurational aspects for operating wireless charging coils  316  in a wireless power receiving mode. 
     Battery  304  may be electrically coupled with wireless charging coils  306   a  and  306   b , although in some embodiments only a single wireless charging coil may be incorporated within the system. The battery may be coupled with the coils via additional components or circuitry in some embodiments as explained above. Wireless charging coils  306  may include wired connections to each of the third wireless charging coil  307  and the battery  304  to receive charging power for powering earbud batteries  312 . As discussed above, a processing unit may facilitate these operations and any configurational aspects for providing power to wireless charging coils  306  from battery  304  or third wireless charging coil  307  in different operational modes. 
     Additional magnetic conductors  308  may extend about wireless charging coils  306 , to limit interference from wireless charging coils  306  transmitting wireless power to the earbuds while third wireless charging coil  307  is receiving wireless power from a wireless power source. A first magnetic conductor  308   a  may extend about wireless charging coil  306   a , and may be embedded within or contained within enclosure  302 . A second magnetic conductor  308   b  may extend about wireless charging coil  306   b , and may also be embedded within or contained within enclosure  302 . In some embodiments, a single magnetic conductor  308  may extend about both wireless charging coils  306 . By including magnetic conductors  308 , in some embodiments enclosure  302  may also continue to efficiently charge enclosure battery  304  from third wireless charging coil  307  even when earbuds  310  are removed from the enclosure, when third wireless charging coil  307  is positioned on a wireless power source. 
       FIG.  3 B  illustrates a cross-sectional view through electronic apparatus  300 , which may further illustrate the arrangement of components in some embodiments of the present technology. The view may illustrate a portion of the apparatus, such as through stem portions of the earbuds  310  and cylindrical portions of cavities  305  as discussed above. As shown, a first earbud  310   a  may include a number of components housed within the stem portion of the earbud. For example, the earbud  310   a  may include a first earbud battery  312   a , which may be positioned in a stem portion or substantially cylindrical portion of earbud  310   a . A first magnetic conductor  314   a  may at least partially extend about first earbud battery  312   a  within earbud  310   a , and may be positioned between first earbud battery  312   a  and a first earbud wireless charging coil  316   a  also contained within the stem portion of first earbud  310   a . As illustrated, the components may be concentrically aligned, or axially aligned, along a central axis through first earbud battery  312   a , or through the stem portion of first earbud battery  312   a . Similarly, second earbud  310   b  may include a second earbud battery  312   b , a second magnetic conductor  314   b , and a second earbud wireless charging coil  316   b . These components may also be axially aligned about a central axis through second earbud battery  312   b , or through the stem portion of second earbud  310   b.    
     Extending radially outward from earbud  310   a  may be cavity  305   a  of enclosure  302 , within which earbud  310   a  may be seated. Similarly, earbud  310   b  may be seated in cavity  305   b  of enclosure  302 . Separate enclosure wireless charging coils  306  may extend about the cavities  305 , which may provide close wireless coupling with the earbuds as will be described further below. Wireless charging coil  306   a  may extend concentrically about cavity  305   a , and may be concentrically or axially aligned with earbud battery  312   a , or the stem portion of earbud  310   a . Wireless charging coil  306   b  may extend concentrically about cavity  305   b , and may be concentrically or axially aligned with earbud battery  312   b , or the stem portion of earbud  310   b . Additional magnetic conductor material  308   a  and  308   b  may similarly extend about enclosure wireless charging coils  306 , and may be axially aligned with the associated battery or earbud stem portion. 
     Magnetic conductor material  314  and magnetic conductor material  308  may be or include a ferrite material or a nanocrystalline foil. The magnetic conductor may be characterized by being non-conductive and ferrimagnetic. Exemplary ferrite materials may include any material including iron, and may include soft ferrites or materials characterized as conductors of magnetic fields. Exemplary materials may include any number of additional elements including nickel, zinc, barium, or manganese, as non-limiting examples. In some embodiments, because many mobile and other electronic devices may be characterized by reduced form factors, ferrite may not provide adequate operational characteristics, as the ferrite may become thinner to accommodate device form factor restrictions. Accordingly, in some embodiments magnetic conductor material  314  and/or magnetic conductor material  308  may be or include a nanocrystalline foil, which may be or include ferrosilicon-containing material or other magnetic material in a layered or fractured material, and which may include adhesives or other polymer supports within the foil material. The foil may include any number of layers of ferrosilicon-containing material from a single layer, to two layers or more. Any other magnetic conducting materials may similarly be incorporated with some embodiments of the present technology. 
     The figure also illustrates a cross-sectional view of third wireless charging coil  307 , which may be electrically coupled with wireless charging coils  306  and the enclosure battery as previously described. As illustrated, wireless charging coil  307  may be characterized by an annular shape in some embodiments, although any shape is similarly encompassed by the present technology. Magnet  320  may be positioned or disposed within a central space about which the third wireless charging coil  307  may extend. In some embodiments, enclosure  302  may also optionally include one or more electromagnetic interference (“EMI”) shields  309 . For example, EMI shield  309  may be disposed within the enclosure and positioned between the third wireless charging coil  307  and an exterior of enclosure  302 . When positioned on a wireless charger, magnet  320  may align third wireless charging coil  307  with one or more coils of the charger, and EMI shield  309  may be positioned between the charger wireless charging coil and the third wireless charging coil  307  of the enclosure  302 . EMI shield  309  may also be characterized by any shape, although in some embodiments EMI shield  309  may not fully extend in a complete circular or annular shape. By including broken coverage, such as with one or more gaps, eddy currents along the EMI shields may be minimized or reduced in some embodiments. 
       FIG.  4    shows a schematic top plan view of a wireless charger  400  according to some embodiments of the present technology. Wireless charger  400  may be or include a power source, such as power source  205  as previously described, and may be used in some embodiments with electronic apparatuses described throughout the present disclosure. Wireless chargers compatible with the present technology may include any number of devices, including any device noted above. Although the wireless chargers may or may not include wired power coupling, wireless charger  400  may optionally include a wired connection  405  for access to mains power. 
     Wireless charger  400  may include any number of components, but of note may include one or more wireless charging coils  410 , which may include any of the features, materials, or characteristics of wireless charging coils described previously. The wireless charging coils may be distributed about a central axis of the wireless charger  400 , and may be distributed about magnet  420  in any number of configurations. Wireless charger  400  may include a ferrite, foil, or other magnetic conductor in some embodiments, and may also include a processor as previously described. Additionally, wireless charger  400  may include one or more hard magnets  420 , which may allow coupling with an electronic apparatus to facilitate wireless charging and coil alignment. 
       FIG.  5    shows a schematic cross-sectional view of a wireless charging system  500  according to some embodiments of the present technology. Wireless charging system  500  may include an electronic apparatus  300  as well as a wireless charger  400  as previously described. It is to be understood, however, that the description may similarly relate to or include any other device or system discussed throughout the present disclosure, or for which aspects of the present technology may be incorporated.  FIG.  5    may illustrate the wireless charging system during a mode of operation where third wireless charging coil  307  may be receiving wireless power from charger wireless charging coil  410 . The third wireless charging coil  307  may be providing power to charge or recharge an enclosure battery. Wireless charging coils  306  may be operating as a load on third wireless charging coil  307 , and may be receiving wired power from third wireless charging coil  307 , which may be occurring simultaneously with power delivery to the enclosure battery in some embodiments. 
     As illustrated, when electronic apparatus  300  is seated on wireless charger  400 , magnet  320  of the electronic apparatus may engage with magnet  420  of the wireless charger  400 . In some embodiments, the magnets may produce an alignment, which may position the earbuds as well as the wireless charging coils of the enclosure and the earbud in a certain orientation with the charger wireless charging coils  410 . For example, the enclosure magnet and/or the wireless charger magnet may provide a rotational engagement in which the magnets may engage in one or more specific orientations. For example, in some embodiments as illustrated, where wireless charger  400  may include one or more wireless charging coils that are shaped differently than third wireless charging coil  307  of the enclosure, the magnets may engage in one or more positions, which may orient or align the wireless charging coils at certain intervals to ensure that the third wireless charging coil  307  receives efficient delivery of power from the charger wireless charging coil  410 . 
       FIG.  6    illustrates a wireless charging system  600  having exemplary circuitry according to some embodiments of the present technology, and may illustrate a portion of wireless charging system  500 , such as with a wireless charger coil, a third wireless charging coil of an electronic apparatus, and wireless charging coils for individual earbuds, which may be operating in a primary-subordinate relationship with the third wireless charging coil. For example, a wireless charger may include a first wireless charging coil  605 . Extending across these coils, or within coupling distance, may be an electronic apparatus having a wireless charging receiver coil  610 , which may be similar to third wireless charging coils described previously. 
     The image illustrates electronics  615  associated with an enclosure of a wireless apparatus, and electronics  620  associated with a first earbud of a wireless apparatus, and electronics  622  associated with a second earbud of a wireless apparatus. Electronics  615  associated with the enclosure may include materials configured to charge an enclosure battery, as well as operate wireless charging coil  610  in a reception mode to receive wireless power from wireless charging coil  605  of a charger or power source. Electronics  620  and electronics  622  associated with the earbuds may include materials or circuitry configured to charge the earbud batteries. The figure may illustrate portions of any component or system described throughout the present disclosure. The enclosure may include an enclosure wireless charging coil  610  for receiving wireless power, and may include two transmission wireless charging coils that may be wired to wireless charging coil  610 . 
     A first transmission wireless charging coil  625  may operate as a load on receiving wireless charging coil  610 , and may be coupled with an earbud wireless charging coil  626 , which may receive wireless power from wireless charging coil  625  and charge a battery of the earbud. Similarly, a second transmission wireless charging coil  630  may operate as a load on receiving wireless charging coil  610 , and may be coupled with an earbud wireless charging coil  631 , which may receive wireless power from wireless charging coil  625  and charge a battery of the earbud. Each of the first transmission wireless charging coil  625  and second transmission wireless charging coil  630  may be coupled with a resonant capacitor as illustrated, which may allow transmission of wireless power to the earbuds simultaneously with charging of the enclosure battery. This may improve charging time for devices, and may improve efficiency by not limiting charging of the earbuds to energy from the enclosure battery. 
     Wireless charging efficiency may be impacted by a number of factors including materials used, power levels, as well as a distance or gap between the wireless charging coils of the transmitting and receiving devices. Even small increases in gap distance may impact the efficiency of charging, which may be directly related to a coupling coefficient that is affected by gap distance. For example, coupling coefficient k1 may be at least partially based on a gap between the coils within the charger and the coils within the electronic apparatus. Additionally, the transmission wireless charging coils  625  and  630  may be similar to a solenoid arrangement with the earbud receiving coils  626  and  631 , which may be characterized by coupling coefficients k2 and k3, respectively. 
     Because a gap between the enclosure transmission wireless charging coils and the earbud receiving wireless charging coils may be maintained at a minimal distance, coupling coefficients k2 and k3 may be greater than or about 0.8 for each earbud wireless charging coil and an associated enclosure wireless charging coil. In some embodiments, coupling coefficients k2 and k3 may be greater than or about 0.85, greater than or about 0.9, greater than or about 0.91, greater than or about 0.92, greater than or about 0.93, greater than or about 0.94, greater than or about 0.95, greater than or about 0.96, greater than or about 0.97, greater than or about 0.98, greater than or about 0.99, or higher. This high coupling may limit a voltage regulation between the enclosure and the earbuds, and reduce communication requirements across the system. 
     For example, systems according to embodiments of the present technology may improve charging of the earbuds, which may be charged by the power source when used, which may increase charging efficiency when the enclosure battery may be at reduced charge. When operating at reduced charge, a voltage provided by the enclosure may be below a charging voltage for the earbuds. Conventionally, a voltage boost may be incorporated to accommodate this situation, which may reduce the charging efficiency, and may increase charging times. Systems according to some embodiments of the present technology may overcome this scenario by affording parallel charging from the wireless charger, as the enclosure transmission wireless charging coils  625  and  630  may receive power directly from wireless receiving coil  610 . Cross regulation may also be improved by the high coupling between the wireless charging coils of the electronic apparatus, which may utilize a single feedback communication channel for voltage regulation. The enclosure may operate as a primary receiver, and the earbud wireless charging coils may operate as a subordinate receiver, as the voltage may track between the components due to the high coupling, independent of load. When the transmission wireless charging coils in the enclosure are engaged for providing wireless charging power to the earbuds, the enclosure may provide the appropriate voltage for the earbuds. 
     As illustrated, the electronics  615  for the enclosure may include a switch  51  positionable between an open and a closed setting. When wireless charging is being provided by a power source, switch  51  may be closed, and charging may occur for both the enclosure and the earbuds in parallel with energy flow separately to each component as illustrated by arrows  635 ,  636 , and  637 . When the electronic apparatus is removed from the wireless charger, switch  51  may be opened, and the enclosure transmission wireless charging coils may receive power from the enclosure battery, and wirelessly charge the earbuds with energy flowing along arrow  640 , from the battery to the charging coils, and then arrows  641  and  642  to the earbud batteries. By utilizing systems according to some embodiments of the present technology, parallel wireless charging of earbud batteries and an earbud enclosure battery may increase charging efficiency of the apparatus and associated components. 
     In the preceding description, for the purposes of explanation, numerous details have been set forth in order to provide an understanding of various embodiments of the present technology. It will be apparent to one skilled in the art, however, that certain embodiments may be practiced without some of these details, or with additional details. 
     Having disclosed several embodiments, it will be recognized by those of skill in the art that various modifications, alternative constructions, and equivalents may be used without departing from the spirit of the embodiments. Additionally, a number of well-known processes and elements have not been described in order to avoid unnecessarily obscuring the present technology. Accordingly, the above description should not be taken as limiting the scope of the technology. 
     Where a range of values is provided, it is understood that each intervening value, to the smallest fraction of the unit of the lower limit, unless the context clearly dictates otherwise, between the upper and lower limits of that range is also specifically disclosed. Any narrower range between any stated values or unstated intervening values in a stated range and any other stated or intervening value in that stated range is encompassed. The upper and lower limits of those smaller ranges may independently be included or excluded in the range, and each range where either, neither, or both limits are included in the smaller ranges is also encompassed within the technology, subject to any specifically excluded limit in the stated range. Where the stated range includes one or both of the limits, ranges excluding either or both of those included limits are also included. Where multiple values are provided in a list, any range encompassing or based on any of those values is similarly specifically disclosed. 
     As used herein and in the appended claims, the singular forms “a”, “an”, and “the” include plural references unless the context clearly dictates otherwise. Thus, for example, reference to “a material” includes a plurality of such materials, and reference to “the coil” includes reference to one or more coils and equivalents thereof known to those skilled in the art, and so forth. 
     Also, the words “comprise(s)”, “comprising”, “contain(s)”, “containing”, “include(s)”, and “including”, when used in this specification and in the following claims, are intended to specify the presence of stated features, integers, components, or operations, but they do not preclude the presence or addition of one or more other features, integers, components, operations, acts, or groups.

Metadata:
Filing Date: 20200923
Publication Date: 20230711
Grant Date: 20230711
Priority Date: 20190925
Inventors: SJOEROOS, JUKKA-PEKKA J.
LI, YE
MOUSSAOUI, ZAKI
Assignee: APPLE INC
CPC Classifications: [{"code": "H02J50/12", "inventive": true, "first": false, "tree": "[]"}, {"code": "H02J50/402", "inventive": true, "first": false, "tree": "[]"}, {"code": "H02J7/02", "inventive": true, "first": false, "tree": "[]"}, {"code": "H02J50/005", "inventive": true, "first": false, "tree": "[]"}, {"code": "H02J50/70", "inventive": true, "first": false, "tree": "[]"}, {"code": "H04R1/1025", "inventive": true, "first": true, "tree": "[]"}, {"code": "H04R1/1025", "inventive": true, "first": true, "tree": "[]"}, {"code": "H02J50/005", "inventive": true, "first": false, "tree": "[]"}, {"code": "H02J50/70", "inventive": true, "first": false, "tree": "[]"}, {"code": "H02J50/402", "inventive": true, "first": false, "tree": "[]"}, {"code": "H02J7/02", "inventive": true, "first": false, "tree": "[]"}, {"code": "H02J50/12", "inventive": true, "first": false, "tree": "[]"}, {"code": "H02J7/02", "inventive": true, "first": true, "tree": "[]"}, {"code": "H02J50/402", "inventive": true, "first": false, "tree": "[]"}, {"code": "H02J50/12", "inventive": true, "first": false, "tree": "[]"}, {"code": "H02J50/70", "inventive": true, "first": false, "tree": "[]"}, {"code": "H02J50/005", "inventive": true, "first": false, "tree": "[]"}, {"code": "H02J50/10", "inventive": true, "first": false, "tree": "[]"}, {"code": "H02J7/0042", "inventive": true, "first": false, "tree": "[]"}, {"code": "H02J7/0044", "inventive": true, "first": false, "tree": "[]"}, {"code": "H02J7/342", "inventive": true, "first": false, "tree": "[]"}, {"code": "H04R1/1016", "inventive": true, "first": false, "tree": "[]"}, {"code": "H04R1/1025", "inventive": true, "first": false, "tree": "[]"}]
Family ID: 87070669