WO2014183352A1 - 一种移动终端的线圈装置 - Google Patents

一种移动终端的线圈装置 Download PDF

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Publication number
WO2014183352A1
WO2014183352A1 PCT/CN2013/082207 CN2013082207W WO2014183352A1 WO 2014183352 A1 WO2014183352 A1 WO 2014183352A1 CN 2013082207 W CN2013082207 W CN 2013082207W WO 2014183352 A1 WO2014183352 A1 WO 2014183352A1
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WO
WIPO (PCT)
Prior art keywords
coil
analog switch
metal
chip
mobile terminal
Prior art date
Application number
PCT/CN2013/082207
Other languages
English (en)
French (fr)
Inventor
史庆伟
Original Assignee
中兴通讯股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 中兴通讯股份有限公司 filed Critical 中兴通讯股份有限公司
Priority to KR1020157026666A priority Critical patent/KR101710822B1/ko
Priority to JP2016503518A priority patent/JP2016514938A/ja
Priority to US14/779,018 priority patent/US9947990B2/en
Priority to EP13884692.8A priority patent/EP2961034B1/en
Publication of WO2014183352A1 publication Critical patent/WO2014183352A1/zh

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/12—Supports; Mounting means
    • H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
    • H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
    • H01Q1/241—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM
    • H01Q1/242—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use
    • H01Q1/243—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use with built-in antennas
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q7/00—Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
    • H02J50/005—Mechanical details of housing or structure aiming to accommodate the power transfer means, e.g. mechanical integration of coils, antennas or transducers into emitting or receiving devices
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
    • H02J50/10—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
    • H02J50/20—Circuit arrangements or systems for wireless supply or distribution of electric power using microwaves or radio frequency waves
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries

Definitions

  • the present invention relates to the field of mobile terminals, and in particular, to a coil device of a mobile terminal.
  • the wireless charging technology is a technology that utilizes the principle of electromagnetic wave induction and related AC induction technology to transmit and receive an induced AC signal at the transmitting end and the receiving end to perform charging.
  • electromagnetic induction wireless charging is commonly used.
  • the principle is to set a primary coil on the side of the charger, the primary coil is loaded with a certain frequency of alternating current, and a certain current is generated in the secondary coil by electromagnetic induction, thereby transferring energy from the transmitting end to the receiving end.
  • the smaller the difference in the size of the secondary coil the smaller the energy transfer loss, and the higher the efficiency of wireless charging.
  • the primary coil on the wireless charger is relatively large. In order to place the secondary coil on the mobile terminal, the size difference between the primary and secondary coils is reduced.
  • FM radios are increasingly used in wireless terminals, especially mobile phones. Since the frequency band of FM radio is generally between 80MHz and 110MHz, the antenna for FM radio is generally required to be 70cm to 1m. Such a long antenna is not practical on a PCB of a wireless terminal.
  • the traditional method is to use the earphone cable as the antenna of the FM radio, but in this case, the function of the FM radio cannot be used without inserting the earphone, which also causes inconvenience.
  • a coil device for a mobile terminal comprising: Metal coil
  • An analog switch connected to the metal coil and the wireless charging chip and the signal receiving chip.
  • the metal coil is embedded in a plane spiral inside the back cover of the mobile terminal.
  • a coil connecting device connected between the metal coil and the analog switch is further included.
  • the analog switch comprises a first analog switch and a second analog switch.
  • the input ends of the first analog switch and the second analog switch are respectively connected to two ends of the metal coil via the coil connecting device, and the first analog switch and the second analog switch An output end is respectively connected to two ends of the wireless charging chip, a second output end of the first analog switch is connected to one end of the signal receiving chip, and a second output end of the second analog switch is grounded, the first analog switch and the The enable terminals of the second analog switch are respectively connected to the baseband processing chip.
  • the coil connecting device comprises:
  • first metal contact and a second metal contact respectively disposed at two ends of the metal coil; and a first position respectively disposed on the main board of the mobile terminal PCB corresponding to the first metal contact and the second metal contact Metal shrapnel and second metal shrapnel.
  • the first metal contact and the second metal contact are respectively embedded at two ends of the metal coil inside the back cover of the mobile terminal.
  • the signal receiving chip is an FM radio chip or a Near Field Communication (NFC) chip or a digital TV chip.
  • NFC Near Field Communication
  • the antenna of the FM radio is combined with a wireless charging coil, and the same set of metal coils are used.
  • the metal coil is embedded in the back cover, that is, the coil area is increased and the length of the coil is lengthened, and the efficiency of wireless charging and the signal receiving performance of the FM radio are improved, and the cost is saved.
  • FIG. 1 is a schematic diagram of a coil device of a mobile terminal according to an embodiment of the present invention
  • FIG. 2 is a schematic structural diagram of a whole mobile terminal according to an embodiment of the present invention
  • FIG. 3 is a schematic plan view of a card cover of a mobile terminal according to an embodiment of the present invention.
  • FIG. 4 is a schematic diagram of mutual switching between a charging and an FM radio according to an embodiment of the present invention.
  • FIG. 1 is a schematic diagram of a coil device of a mobile terminal provided by the present invention. As shown in FIG. 1, the method includes: a metal coil 101; an analog switch 102 connected to the metal coil and the wireless charging chip and the signal receiving chip.
  • the metal coil 101 is embedded in a plane spiral shape inside the rear cover of the mobile terminal.
  • the signal receiving chip is an FM radio chip or an NFC chip or a digital TV chip.
  • the present invention also includes a coil connecting device 103 connected between the metal coil 101 and the analog switch 102.
  • the analog switch 102 includes a first analog switch 1021 and a second analog switch 1022.
  • the input ends of the first analog switch and the second analog switch are respectively connected to two ends of the metal coil 101 via the coil connecting device 103, and the first one of the first analog switch and the second analog switch
  • the output ends are respectively connected to the two ends of the wireless charging chip, such that the metal coil 101 acts as a secondary coil to charge the battery of the mobile terminal, and the second output end of the first analog switch is connected to one end of the signal receiving chip,
  • the second output end of the two analog switches is grounded, and the metal coil 101 serves as an antenna for receiving a frequency modulation signal for the signal receiving chip, and the enable ends of the first analog switch and the second analog switch are respectively connected to the baseband Processing chip for controlling switching of the first analog switch and the second analog switch.
  • the coil connecting device 103 includes: a first metal contact and a second metal contact respectively disposed at two ends of the metal coil 101; and the first metal contact and the second metal on the mobile terminal PCB main board The first metal dome and the second metal dome are respectively disposed at corresponding positions of the contacts.
  • the first metal contact and the second metal contact are respectively embedded at both ends of the metal coil 101 inside the rear cover of the mobile terminal.
  • the main structure includes a metal coil 3, a coil metal contact point 4, and a metal dome 6 on the PCB.
  • the metal coil 3 is spirally wound in a plane and is mounted on the inner side 2 of the rear cover of the mobile terminal by means of an embedded manner. Then, the two ends of the metal coil 3 are connected to the metal contact point 4, and the metal contact point 4 is also embedded on the inner side 2 of the rear cover of the mobile terminal.
  • Two metal domes 6 are mounted on the PCB 4 of the mobile terminal. When the cover 1 is over the mobile terminal, the metal contact point 4 is pressed against the metal dome 6, so that the wireless charging coil and the charging circuit and the signal receiving circuit receiving the frequency modulated signal through the antenna are in communication.
  • FIG. 3 is a schematic plan view showing the card cover of the mobile terminal provided by the embodiment of the present invention.
  • the metal coil 3 is spirally wound in a plane spirally embedded on the inner side 2 of the back cover of the mobile terminal, at the two joints of the coil. Connect a metal contact point 4 separately.
  • FIG. 4 is a circuit diagram showing switching between a charging and an FM radio according to an embodiment of the present invention.
  • the first analog switch 11 and the second analog switch 12 are controlled by a baseband processing chip 15 for switching the metal coil 10. Connection path.
  • the first analog switch 11 and the second analog switch 12 are connected to the charge management chip 14 by default, and the metal coil 10 serves as a secondary coil for charging the battery 16; when the user turns on the FM radio function, the baseband processing chip 15 controls the first
  • the analog switch 11 and the second analog switch 12 switch the connection path of the metal coil 10, the first analog switch 11 is connected to the FM radio chip 13, the second analog switch 12 is grounded, and the metal coil 10 serves as an antenna of the FM radio for receiving the frequency modulation.
  • the signal of the radio is a circuit diagram showing switching between a charging and an FM radio according to an embodiment of the present invention.
  • the first analog switch 11 and the second analog switch 12 are controlled by a baseband processing chip 15 for switching the metal coil 10. Connection path.
  • the path connecting the metal coil to the FM radio chip and the charge management chip An analog switch is added to the baseband processing chip for switching.
  • the control analog switch connects the metal coil to the charge management chip and is used to charge the metal coil as a secondary coil.
  • the baseband chip controls the analog switch, and the metal coil and the FM radio. The chips are connected and the metal coil acts as an antenna.
  • the metal coil is spirally embedded in the back cover of the mobile terminal, and a metal contact is respectively added to the two joints of the metal coil, and the PCB main board is in the same position.
  • a metal dome is attached to the metal contact through a metal dome.
  • the metal shrapnel on the PCB main board is connected to the wireless charging chip and the signal receiving chip through the wiring.
  • the antenna receiving the FM signal is combined with the wireless charging secondary coil, and the same set of metal coils is used.
  • the metal coil is embedded in the inner side of the back cover, that is, the area of the metal coil is increased to lengthen the length of the metal coil, and the efficiency of wireless charging and the receiving performance of the received FM signal are improved, and the cost is saved.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Power Engineering (AREA)
  • Telephone Set Structure (AREA)
  • Near-Field Transmission Systems (AREA)
  • Signal Processing (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

一种移动终端的线圈装置，包括：呈平面螺旋状嵌入在移动终端后盖内侧的金属线圈；连接在所述金属线圈与无线充电芯片和信号接收芯片的模拟开关。本发明实施例将接收调频信号的天线与无线充电线圈相结合，使用同一组金属线圈，并将该金属线圈嵌入在移动终端后盖内侧中，即加大线圈面积又加长了线圈的长度，同时提高了无线充电的效率和调频信号接收的性能。

Description

一种移动终端的线圈装置
技术领域
本发明涉及移动终端领域， 尤其涉及一种移动终端的线圈装置。
背景技术
无线充电技术是一种利用了电磁波感应原理， 及相关的交流感应技术， 在发送端和接受端用相应的线圈来发送和接受产生感应的交流信号来进行充 电的技术。 目前比较常用的是电磁感应式无线充电。 其原理在于在充电器一 侧设置一个初级线圈， 初级线圈上加载一定频率的交流电， 通过电磁感应在 次级线圈产生一定的电流， 从而将能量从传输端转移到接收端。 当初次级线 圈的大小差距越小， 能量传递损耗越小， 无线充电的效率越高。 而无线充电 器上的初级线圈做的比较大， 针对将次级线圈放在移动终端的何种位置使初 次级线圈的大小差距变小， 我们还需要从智能移动终端上挤出位置放次级线 圈。 另一方面， 调频收音机在无线终端， 尤其是手机中应用越来越多。 由于 调频广播的波段一般在 80MHz到 110MHz,因此对于调频收音机的天线一般 要求 70厘米至 1米。如此长的天线，做在无线终端的 PCB板上是不现实的。 传统的做法是用耳机线作为调频收音机的天线， 但是这种情况下， 不插入耳 机就无法使用调频收音机的功能， 这样也造成了不便之处。
发明内容
本发明的目的在于提供一种移动终端的线圈装置， 将无线充电线圈与调 频收音机天线相结合， 使用同一组金属线圈， 将其做在移动终端的后盖上。 即充当无线充电线圈， 同时复用了调频广播的天线， 这样不仅提高无线充电 效率， 同时达到了功能复用， 节省了成本。
根据本发明的一个方面， 提供了一种移动终端的线圈装置， 包括： 金属线圈；
连接在所述金属线圈与无线充电芯片和信号接收芯片的模拟开关。
优选地， 所述金属线圈呈平面螺旋状嵌入在移动终端后盖内侧。
优选地， 还包括连接在所述金属线圈与所述模拟开关之间的线圈连接装 置。
优选地， 所述模拟开关包括第一模拟开关和第二模拟开关。
优选地， 所述第一模拟开关和所述第二模拟开关的输入端分别经由所述 线圈连接装置连接所述金属线圈的两端， 所述第一模拟开关和所述第二模拟 开关的第一输出端分别连接无线充电芯片的两端， 所述第一模拟开关的第二 输出端连接信号接收芯片一端， 所述第二模拟开关的第二输出端接地， 所述 第一模拟开关和所述第二模拟开关的使能端分别连接基带处理芯片。
优选地， 所述线圈连接装置包括：
分别设置在所述金属线圈两端的第一金属触点和第二金属触点； 在移动终端 PCB 主板上与所述第一金属触点和所述第二金属触点相应 位置分别设置的第一金属弹片和第二金属弹片。
优选地， 所述第一金属触点和所述第二金属触点分别嵌入在移动终端后 盖内侧的所述金属线圈的两端。
优选地， 所述信号接收芯片是调频收音机芯片或近距离无线通信（Near Field Communication, NFC ) 芯片或数字电视芯片。
与现有技术相比较， 本发明实施例的有益效果在于：
本发明实施例将调频收音机的天线与无线充电线圈相结合， 使用同一组 金属线圈。 并将该金属线圈嵌入在后盖中， 即加大线圈面积又加长了线圈的 长度， 同时提高了无线充电的效率和调频收音机的信号接收性能， 并且节省 了成本。
下面结合附图对本发明的结构及原理进行详细说明。 附图概述
图 1是本发明实施例提供的一种移动终端的线圈装置的示意图； 图 2是本发明实施例提供的移动终端的整机结构示意图；
图 3是本发明实施例提供的移动终端卡盖平面示意图；
图 4是本发明实施例提供的充电与调频收音机相互切换示意图。
本发明的较佳实施方式
以下结合附图对本发明的优选实施例进行详细说明， 应当理解， 以下所 说明的优选实施例仅用于说明和解释本发明， 并不用于限定本发明。
图 1显示了本发明提供的一种移动终端的线圈装置的示意图， 如图 1所 示， 包括： 金属线圈 101 ; 连接在所述金属线圈与无线充电芯片和信号接收 芯片的模拟开关 102。 其中， 所述金属线圈 101呈平面螺旋状嵌入在移动终 端后盖内侧。
所述信号接收芯片是调频收音机芯片或 NFC芯片或数字电视芯片。 本发明还包括连接在所述金属线圈 101与所述模拟开关 102之间的线圈 连接装置 103。
所述模拟开关 102包括第一模拟开关 1021和第二模拟开关 1022。 所述 第一模拟开关和所述第二模拟开关的输入端分别经由所述线圈连接装置 103 连接所述金属线圈 101的两端， 所述第一模拟开关和所述第二模拟开关的第 一输出端分别连接无线充电芯片的两端， 使其所述金属线圈 101充当次级线 圈， 为移动终端的电池充电， 所述第一模拟开关的第二输出端连接信号接收 芯片一端， 所述第二模拟开关的第二输出端接地， 使其所述金属线圈 101充 当天线， 用于为信号接收芯片接收调频信号， 所述第一模拟开关和所述第二 模拟开关的使能端分别连接基带处理芯片， 用于控制所述第一模拟开关和所 述第二模拟开关的切换。 所述线圈连接装置 103包括： 分别设置在所述金属线圈 101两端的第一 金属触点和第二金属触点；在移动终端 PCB主板上与所述第一金属触点和所 述第二金属触点相应位置分别设置的第一金属弹片和第二金属弹片。
具体地说， 所述第一金属触点和所述第二金属触点分别嵌入在移动终端 后盖内侧的所述金属线圈 101的两端。
图 2显示了本发明实施例提供的移动终端的整机结构示意图， 如图 2所 示， 主要包括了金属线圈 3 , 线圈金属接触点 4和 PCB板上金属弹片 6。 其 中， 所述金属线圈 3呈平面螺旋盘绕， 通过嵌入式的方式安装在移动终端后 盖内侧 2上。 然后金属线圈 3的两端连接在金属接触点 4上， 所述金属接触 点 4同样也是嵌入在移动终端后盖内侧 2上，移动终端 PCB主板 5上安装两 个金属弹片 6,当移动终端后盖 1盖在移动终端上时， 金属接触点 4压在金属 弹片 6上， 使无线充电线圈和充电电路及通过天线接收调频信号的信号接收 电路连通。
图 3显示了本发明实施例提供的移动终端卡盖平面示意图，如图 3所示， 将金属线圈 3呈平面螺旋状盘绕嵌入在移动终端卡盖背面内侧 2上， 在线圈 的两个接头处分别连接一个金属接触点 4。
图 4显示了本发明实施例提供的充电与调频收音机相互切换的电路图， 如图 4所示，第一模拟开关 11和第二模拟开关 12受基带处理芯片 15的控制， 用来切换金属线圈 10的连接通路。第一模拟开关 11和第二模拟开关 12默认 连接至充电管理芯片 14, 金属线圈 10充当次级线圈， 用来为电池 16充电； 当用户打开调频收音机功能的时候， 基带处理芯片 15控制第一模拟开关 11 和第二模拟开关 12来切换金属线圈 10的连接通路，第一模拟开关 11连接至 调频收音机芯片 13 , 第二模拟开关 12接地， 金属线圈 10充当调频收音机的 天线， 用来接收调频收音机的信号。
也就是说， 在金属线圈与调频收音机芯片和充电管理芯片相连接的通路 上加上模拟开关， 由基带处理芯片控制， 用以切换。 默认状态下， 控制模拟 开关将金属线圈与充电管理芯片相连接， 用于将金属线圈充当次级线圈为电 池充电； 当用户打开调频收音机功能时， 基带芯片控制模拟开关， 将金属线 圈与调频收音机芯片相连接， 此时金属线圈充当天线使用。
本发明实施例为了扩大金属线圈的面积， 将金属线圈呈平面螺旋状嵌入 在移动终端的后盖上， 在金属线圈的两个接头处分别添加一个金属触点， 同 时 PCB主板上在相同的位置上加上金属弹片，通过金属弹片与金属触点相连 接。 PCB主板上的金属弹片通过走线与无线充电芯片和信号接收芯片相连。
尽管上文对本发明进行了详细说明， 但是本发明不限于此， 本技术领域 技术人员可以根据本发明的原理进行各种修改。 因此， 凡按照本发明原理所 作的修改， 都应当理解为落入本发明的保护范围。
工业实用性
综上所述， 本发明实施例具有以下技术效果：
本发明实施例将接收调频信号的天线与无线充电次级线圈相结合， 使用 同一组金属线圈。 并将该金属线圈嵌入在后盖内侧中， 即加大金属线圈面积 又加长了金属线圈的长度， 同时提高了无线充电的效率和接收调频信号的接 收性能， 并且节省了成本。

Claims

权 利 要 求 书
1、 一种移动终端的线圈装置， 包括：
金属线圈；
连接在所述金属线圈与无线充电芯片和信号接收芯片的模拟开关。
2、 根据权利要求 1 所述的装置， 其中， 所述金属线圈呈平面螺旋状嵌 入在移动终端后盖内侧。
3、 根据权利要求 2 所述的线圈装置， 其中， 还包括连接在所述金属线 圈与所述模拟开关之间的线圈连接装置。
4、 根据权利要求 1 所述的线圈装置， 其中， 所述模拟开关包括第一模 拟开关和第二模拟开关。
5、 根据权利要求 4 所述的线圈装置， 其中， 所述第一模拟开关和所述 第二模拟开关的输入端分别经由所述线圈连接装置连接所述金属线圈的两端, 所述第一模拟开关和所述第二模拟开关的第一输出端分别连接无线充电芯片 的两端， 所述第一模拟开关的第二输出端连接信号接收芯片一端， 所述第二 模拟开关的第二输出端接地， 所述第一模拟开关和所述第二模拟开关的使能 端分别连接基带处理芯片。
6、 根据权利要求 3所述的线圈装置， 其中， 所述线圈连接装置包括： 分别设置在所述金属线圈两端的第一金属触点和第二金属触点； 在移动终端 PCB 主板上与所述第一金属触点和所述第二金属触点相应 位置分别设置的第一金属弹片和第二金属弹片。
7、 根据权利要求 6 所述的线圈装置， 其中， 所述第一金属触点和所述 第二金属触点分别嵌入在移动终端后盖内侧的所述金属线圈的两端。
8、 根据权利要求 1 所述的线圈装置， 其中， 所述信号接收芯片是调频 收音机芯片或 NFC芯片或数字电视芯片。
PCT/CN2013/082207 2013-05-15 2013-08-23 一种移动终端的线圈装置 WO2014183352A1 (zh)

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