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CN110544855A - Power adapters and electronic equipment including power adapters - Google Patents

Power adapters and electronic equipment including power adapters Download PDF

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Publication number
CN110544855A
CN110544855A CN201810532289.XA CN201810532289A CN110544855A CN 110544855 A CN110544855 A CN 110544855A CN 201810532289 A CN201810532289 A CN 201810532289A CN 110544855 A CN110544855 A CN 110544855A
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CN
China
Prior art keywords
power
electronic device
electric connector
signal
electrical connector
Prior art date
Legal status (The legal status 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 status listed.)
Pending
Application number
CN201810532289.XA
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Chinese (zh)
Inventor
张硕耘
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shaoxing Jicheng Packaging Machinery Co ltd
Hon Hai Precision Industry Co Ltd
Original Assignee
Shaoxing Jicheng Packaging Machinery Co ltd
Hon Hai Precision Industry Co Ltd
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.)
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Publication date
Application filed by Shaoxing Jicheng Packaging Machinery Co ltd, Hon Hai Precision Industry Co Ltd filed Critical Shaoxing Jicheng Packaging Machinery Co ltd
Priority to CN201810532289.XA priority Critical patent/CN110544855A/en
Publication of CN110544855A publication Critical patent/CN110544855A/en
Pending legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/66—Structural association with built-in electrical component
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/66—Structural association with built-in electrical component
    • H01R13/6608—Structural association with built-in electrical component with built-in single component
    • H01R13/6625—Structural association with built-in electrical component with built-in single component with capacitive component
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/66—Structural association with built-in electrical component
    • H01R13/6608—Structural association with built-in electrical component with built-in single component
    • H01R13/6633—Structural association with built-in electrical component with built-in single component with inductive component, e.g. transformer
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R31/00—Coupling parts supported only by co-operation with counterpart
    • H01R31/06—Intermediate parts for linking two coupling parts, e.g. adapter
    • H01R31/065—Intermediate parts for linking two coupling parts, e.g. adapter with built-in electric apparatus

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Details Of Connecting Devices For Male And Female Coupling (AREA)

Abstract

一种电源适配器，包括一电线及连接于所述电线两端的第一电连接器及第二电连接器，所述第一电连接器用于接收一输入电压，所述第二电连接器用于插接至一电子设备，以为所述电子设备供电。所述电线包括电源线及信号线，所述电源线用于接收所述第一电连接器输出的电源信号并传输至所述第二电连接器，所述信号线用于接收无线电信号，所述第二电连接器用于输出所述电源信号及所述无线电信号至所述电子设备。本发明还提供一种包括该电源适配器的电子设备。上述电源适配器及包括电源适配器的电子设备，其可实现将电源线与天线整合在一起，方便布线。

A power adapter includes a wire and a first electrical connector and a second electrical connector connected to both ends of the wire, the first electrical connector is used to receive an input voltage, and the second electrical connector is used to plug in Connected to an electronic device to supply power to the electronic device. The wire includes a power line and a signal line, the power line is used to receive the power signal output by the first electrical connector and transmit it to the second electrical connector, and the signal line is used to receive radio signals, so The second electrical connector is used for outputting the power signal and the radio signal to the electronic device. The present invention also provides an electronic device including the power adapter. The above-mentioned power adapter and the electronic device including the power adapter can realize the integration of the power line and the antenna, which is convenient for wiring.

Description

电源适配器及包括电源适配器的电子设备Power adapters and electronic equipment including power adapters

技术领域technical field

本发明涉及电子设备技术领域，尤其涉及一种电源适配器及包括电源适配器的电子设备。The present invention relates to the technical field of electronic devices, and in particular, to a power adapter and an electronic device including the power adapter.

背景技术Background technique

现有的一些无线电产品搭配有外置天线来实现无线信号发射/接收，同时该无线电产品还需搭配电源线来为其供电。如此若将该无线电产品布局到其他空间有限的主设备上时，该无线电产品会有两条线(电源线和天线)需要布线，不利于该主设备的整体布线。Some existing radio products are equipped with external antennas to achieve wireless signal transmission/reception, and the radio products also need to be equipped with a power cord to supply power. In this way, if the radio product is arranged on other main equipment with limited space, the radio product will have two wires (power line and antenna) that need to be wired, which is not conducive to the overall wiring of the main equipment.

发明内容SUMMARY OF THE INVENTION

鉴于以上内容，有必要提供一种电源适配器及包括电源适配器的电子设备，其可实现将电源线与天线整合在一起，方便布线。In view of the above, it is necessary to provide a power adapter and an electronic device including the power adapter, which can realize the integration of a power cord and an antenna, and facilitate wiring.

本发明一实施方式提供一种电源适配器，包括一电线及连接于所述电线两端的第一电连接器及第二电连接器，所述第一电连接器用于接收一输入电压，所述第二电连接器用于插接至一电子设备，以为所述电子设备供电。所述电线包括电源线及信号线，所述电源线用于接收所述第一电连接器输出的电源信号并传输至所述第二电连接器，所述信号线用于接收无线电信号，所述第二电连接器用于输出所述电源信号及所述无线电信号至所述电子设备。An embodiment of the present invention provides a power adapter, which includes a wire, a first electrical connector and a second electrical connector connected to both ends of the wire, the first electrical connector is used for receiving an input voltage, and the first electrical connector is used for receiving an input voltage. The two electrical connectors are used for plugging into an electronic device to supply power to the electronic device. The wire includes a power line and a signal line, the power line is used to receive the power signal output by the first electrical connector and transmit it to the second electrical connector, and the signal line is used to receive radio signals, so The second electrical connector is used for outputting the power signal and the radio signal to the electronic device.

优选地，所述电子设备为收音机，所述信号线为所述收音机的天线。Preferably, the electronic device is a radio, and the signal line is an antenna of the radio.

优选地，所述第一电连接器为点烟器连接头。Preferably, the first electrical connector is a cigarette lighter connector.

优选地，所述电源适配器还包括：Preferably, the power adapter further includes:

第一磁珠，一端电连接于所述第二电连接器的第一引脚端，另一端用于接收所述电源信号；a first magnetic bead, one end of which is electrically connected to the first pin end of the second electrical connector, and the other end is used for receiving the power signal;

第一电容，一端电连接于所述第二电连接器的第二引脚端，另一端用于接收所述无线电信号；及a first capacitor, one end is electrically connected to the second pin end of the second electrical connector, and the other end is used for receiving the radio signal; and

电感，一端电连接于所述第二电连接器的第二引脚端，另一端电连接于一基准地；an inductor, one end is electrically connected to the second pin end of the second electrical connector, and the other end is electrically connected to a reference ground;

其中，所述第二电连接器的壳体、接地端均电连接于所述基准地。Wherein, the housing and the ground terminal of the second electrical connector are both electrically connected to the reference ground.

优选地，所述电源适配器还包括：Preferably, the power adapter further includes:

第二磁珠，电连接于所述基准地与一电源地之间；及The second magnetic bead is electrically connected between the reference ground and a power ground; and

第二电容，与所述第二磁珠并联连接。The second capacitor is connected in parallel with the second magnetic beads.

本发明一实施方式还提供一种电子设备，包括电子设备本体及用于对所述电子设备本体供电的电源适配器，所述电源适配器包括一电线及连接于所述电线两端的第一电连接器及第二电连接器，所述第一电连接器用于接收一输入电压，所述第二电连接器用于插接至所述电子设备本体。所述电线包括电源线及信号线，所述电源线用于接收所述第一电连接器输出的电源信号并传输至所述第二电连接器，所述信号线用于接收无线电信号，所述第二电连接器用于输出所述电源信号及所述无线电信号至所述电子设备本体。An embodiment of the present invention also provides an electronic device, including an electronic device body and a power adapter for supplying power to the electronic device body, the power adapter including a wire and a first electrical connector connected to both ends of the wire and a second electrical connector, the first electrical connector is used to receive an input voltage, and the second electrical connector is used to be plugged into the electronic device body. The wire includes a power line and a signal line, the power line is used to receive the power signal output by the first electrical connector and transmit it to the second electrical connector, and the signal line is used to receive radio signals, so The second electrical connector is used for outputting the power signal and the radio signal to the electronic device body.

优选地，所述电子设备为收音机，所述信号线为所述收音机的天线。Preferably, the electronic device is a radio, and the signal line is an antenna of the radio.

优选地，所述第一电连接器为点烟器连接头。Preferably, the first electrical connector is a cigarette lighter connector.

优选地，所述电源适配器还包括：Preferably, the power adapter further includes:

第一磁珠，一端电连接于所述第二电连接器的第一引脚端，另一端用于接收所述电源信号；a first magnetic bead, one end of which is electrically connected to the first pin end of the second electrical connector, and the other end is used for receiving the power signal;

第一电容，一端电连接于所述第二电连接器的第二引脚端，另一端用于接收所述无线电信号；及a first capacitor, one end is electrically connected to the second pin end of the second electrical connector, and the other end is used for receiving the radio signal; and

电感，一端电连接于所述第二电连接器的第二引脚端，另一端电连接于一基准地；an inductor, one end is electrically connected to the second pin end of the second electrical connector, and the other end is electrically connected to a reference ground;

其中，所述第二电连接器的壳体端、接地端均电连接于所述基准地。Wherein, the housing end and the ground end of the second electrical connector are both electrically connected to the reference ground.

优选地，所述电源适配器还包括：Preferably, the power adapter further includes:

第二磁珠，电连接于所述基准地与一电源地之间；及The second magnetic bead is electrically connected between the reference ground and a power ground; and

第二电容，与所述第二磁珠并联连接。The second capacitor is connected in parallel with the second magnetic beads.

与现有技术相比，上述电源适配器及包括电源适配器的电子设备，将电源线与天线整合在一起，布线简单且成本低廉。Compared with the prior art, the above-mentioned power adapter and the electronic device including the power adapter integrate the power cord and the antenna, and the wiring is simple and the cost is low.

附图说明Description of drawings

图1是本发明电子设备的一实施方式的功能模块图。FIG. 1 is a functional block diagram of an embodiment of an electronic device of the present invention.

图2是本发明电源适配器的一实施方式的功能模块图。FIG. 2 is a functional block diagram of an embodiment of the power adapter of the present invention.

图3是本发明电源适配器的一实施方式的电路图。FIG. 3 is a circuit diagram of an embodiment of the power adapter of the present invention.

主要元件符号说明Description of main component symbols

如下具体实施方式将结合上述附图进一步说明本发明。The following specific embodiments will further illustrate the present invention in conjunction with the above drawings.

具体实施方式Detailed ways

请参阅图1，本发明一实施方式提供一电子设备100，所述电子设备100包括电子设备本体110及电源适配器120，所述电源适配器120用于为所述电子设备本体110提供电源信号。所述电子设备100优选为具有无线信号发射/接收功能的电子设备，例如：收音机。Referring to FIG. 1 , an embodiment of the present invention provides an electronic device 100 . The electronic device 100 includes an electronic device body 110 and a power adapter 120 . The power adapter 120 is used to provide a power signal to the electronic device body 110 . The electronic device 100 is preferably an electronic device with wireless signal transmission/reception functions, such as a radio.

请同时参阅图2，所述电源适配器120包括电线10，第一电连接器20及第二电连接器30。所述第一电连接器20与所述第二电连接器30分别连接于所述电线10的两端，所述第一电连接器20用于接收一输入电压，所述第二电连接器30用于插接至所述电子设备本体110。所述电线10包括电源线12及信号线14；所述电源线12用于接收所述第一电连接器20输出的电源信号并传输至所述第二电连接器30；所述信号线14用于接收无线电信号；所述第二电连接器30用于输出所述电源信号及所述无线电信号至所述电子设备本体110。Please also refer to FIG. 2 , the power adapter 120 includes a wire 10 , a first electrical connector 20 and a second electrical connector 30 . The first electrical connector 20 and the second electrical connector 30 are respectively connected to two ends of the wire 10 , the first electrical connector 20 is used for receiving an input voltage, and the second electrical connector 30 is used for being plugged into the electronic device body 110 . The electric wire 10 includes a power line 12 and a signal line 14; the power line 12 is used to receive the power signal output by the first electrical connector 20 and transmit it to the second electrical connector 30; the signal line 14 For receiving radio signals; the second electrical connector 30 is used for outputting the power signal and the radio signal to the electronic device body 110 .

在一实施方式中，可以将电线10所包含的地线来改装成所述信号线14。当所述电子设备100为收音机时，所述信号线14即为所述收音机的天线。In one embodiment, the ground wire contained in the electrical wire 10 may be retrofitted into the signal wire 14 . When the electronic device 100 is a radio, the signal line 14 is the antenna of the radio.

在一实施方式中，所述第一电连接器20优选为点烟器连接头，进而可以从一汽车中接收输入电压，所述第二电连接器30优选为一圆孔电源接头。在本发明的其他实施方式中，所述第一电连接器20、所述第二电连接器30也可以为其他能实现本发明功能的连接头。In one embodiment, the first electrical connector 20 is preferably a cigarette lighter connector, which can receive an input voltage from an automobile, and the second electrical connector 30 is preferably a round hole power connector. In other embodiments of the present invention, the first electrical connector 20 and the second electrical connector 30 may also be other connectors capable of realizing the functions of the present invention.

请同时参阅图3，为本发明一实施方式的电源适配器120的电路图。Please also refer to FIG. 3 , which is a circuit diagram of a power adapter 120 according to an embodiment of the present invention.

所述电源适配器120包括第一电连接器20、第二电连接器30、第一磁珠FB1、第二磁珠FB2、第一电容C1、第二电容C2、电感L。The power adapter 120 includes a first electrical connector 20 , a second electrical connector 30 , a first magnetic bead FB1 , a second magnetic bead FB2 , a first capacitor C1 , a second capacitor C2 , and an inductance L.

所述第二电连接器30包括壳体端SH1、第一引脚端P1、第二引脚端P2、接地端G1。所述壳体端SH1及所述接地端G1电连接于一基准地DCIN_GND。The second electrical connector 30 includes a shell end SH1, a first pin end P1, a second pin end P2, and a ground end G1. The shell end SH1 and the ground end G1 are electrically connected to a reference ground DCIN_GND.

所述第一磁珠FB1的一端电连接于所述第二电连接器30的第一引脚端P1，所述第一磁珠FB1的另一端电连接于所述第一电连接器20，用于接收所述第一电连接器20输出的电源信号。所述第一电容C1的一端电连接于所述第二电连接器30的第二引脚端P2，所述第一电容C1的另一端用于接收所述无线电信号。所述电感L的一端电连接于所述第二电连接器30的第二引脚端P2，所述电感L的另一端电连接于所述基准地DCIN_GND。所述第二磁珠FB2电连接于所述基准地DCIN_GND与一电源地PWR_GND之间。所述第二电容C2电连接于所述基准地DCIN_GND与一电源地PWR_GND之间。One end of the first magnetic bead FB1 is electrically connected to the first pin end P1 of the second electrical connector 30 , and the other end of the first magnetic bead FB1 is electrically connected to the first electrical connector 20 . for receiving the power signal output by the first electrical connector 20 . One end of the first capacitor C1 is electrically connected to the second pin end P2 of the second electrical connector 30 , and the other end of the first capacitor C1 is used for receiving the radio signal. One end of the inductor L is electrically connected to the second pin end P2 of the second electrical connector 30 , and the other end of the inductor L is electrically connected to the reference ground DCIN_GND. The second magnetic bead FB2 is electrically connected between the reference ground DCIN_GND and a power ground PWR_GND. The second capacitor C2 is electrically connected between the reference ground DCIN_GND and a power ground PWR_GND.

在一实施方式中，所述基准地DCIN_GND可以是所述第二电连接器30的接地部，所述电源地PWR_GND可以是所述第一电连接器20的接地部。In one embodiment, the reference ground DCIN_GND may be the ground portion of the second electrical connector 30 , and the power ground PWR_GND may be the ground portion of the first electrical connector 20 .

上述电源适配器及包括电源适配器的电子设备，将电源线与天线整合在一起，布线简单且成本低廉。The above-mentioned power adapter and the electronic device including the power adapter integrate the power cord and the antenna together, and the wiring is simple and the cost is low.

对本领域的技术人员来说，可以根据本发明的发明方案和发明构思结合生产的实际需要做出其他相应的改变或调整，而这些改变和调整都应属于本发明所公开的范围。For those skilled in the art, other corresponding changes or adjustments can be made according to the inventive solution and inventive concept of the present invention combined with the actual needs of production, and these changes and adjustments should all belong to the scope disclosed by the present invention.

Claims (10)

1. a power adapter comprises a wire, a first electric connector and a second electric connector, wherein the first electric connector and the second electric connector are connected to two ends of the wire, the first electric connector is used for receiving an input voltage, the second electric connector is used for being plugged into an electronic device to supply power to the electronic device, the power adapter is characterized in that the wire comprises a power line and a signal line, the power line is used for receiving a power signal output by the first electric connector and transmitting the power signal to the second electric connector, the signal line is used for receiving a radio signal, and the second electric connector is used for outputting the power signal and the radio signal to the electronic device.
2. The power adapter as claimed in claim 1, wherein the electronic device is a radio and the signal line is an antenna of the radio.
3. The power adapter as described in claim 2, wherein said first electrical connector is a cigarette lighter connector.
4. the power adapter as claimed in claim 1, further comprising:
One end of the first magnetic bead is electrically connected to the first pin end of the second electrical connector, and the other end of the first magnetic bead is used for receiving the power supply signal;
One end of the first capacitor is electrically connected to the second pin end of the second electric connector, and the other end of the first capacitor is used for receiving the radio signal; and
The inductor is electrically connected with the second pin end of the second electric connector at one end and electrically connected with a reference ground at the other end;
And the shell and the grounding end of the second electric connector are electrically connected to the reference ground.
5. The power adapter as recited in claim 4 further comprising:
the second magnetic bead is electrically connected between the reference ground and a power ground; and
And the second capacitor is connected with the second magnetic beads in parallel.
6. an electronic device comprises an electronic device body and a power adapter used for supplying power to the electronic device body, wherein the power adapter comprises a wire, a first electric connector and a second electric connector, the first electric connector and the second electric connector are connected to two ends of the wire, the first electric connector is used for receiving an input voltage, the second electric connector is used for being plugged into the electronic device body, the electronic device is characterized in that the wire comprises a power wire and a signal wire, the power wire is used for receiving a power signal output by the first electric connector and transmitting the power signal to the second electric connector, the signal wire is used for receiving a radio signal, and the second electric connector is used for outputting the power signal and the radio signal to the electronic device body.
7. the electronic device of claim 6, wherein the electronic device is a radio and the signal line is an antenna of the radio.
8. The electronic device of claim 7, wherein the first electrical connector is a cigarette lighter connector.
9. The electronic device of claim 6, wherein the power adapter further comprises:
One end of the first magnetic bead is electrically connected to the first pin end of the second electrical connector, and the other end of the first magnetic bead is used for receiving the power supply signal;
One end of the first capacitor is electrically connected to the second pin end of the second electric connector, and the other end of the first capacitor is used for receiving the radio signal; and
The inductor is electrically connected with the second pin end of the second electric connector at one end and electrically connected with a reference ground at the other end;
And the shell end and the grounding end of the second electric connector are electrically connected to the reference ground.
10. The electronic device of claim 9, wherein the power adapter further comprises:
the second magnetic bead is electrically connected between the reference ground and a power ground; and
and the second capacitor is connected with the second magnetic beads in parallel.
CN201810532289.XA 2018-05-29 2018-05-29 Power adapters and electronic equipment including power adapters Pending CN110544855A (en)

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Application Number Priority Date Filing Date Title
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Application Number Priority Date Filing Date Title
CN201810532289.XA CN110544855A (en) 2018-05-29 2018-05-29 Power adapters and electronic equipment including power adapters

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Publication Number Publication Date
CN110544855A true CN110544855A (en) 2019-12-06

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Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10258198A1 (en) * 2001-12-20 2003-07-17 Hitachi Cable Flat plate-shaped multiplex antenna and portable connection device
CN101752661A (en) * 2008-12-05 2010-06-23 索尼株式会社 Power supply device, power cable and reception device
CN201550105U (en) * 2009-11-19 2010-08-11 华为终端有限公司 Terminal and system using power line as wireless receiving antenna
CN202033847U (en) * 2011-05-25 2011-11-09 重庆南天数据资讯服务有限公司 Wireless pos machine
CN202183773U (en) * 2011-07-13 2012-04-04 上海博泰悦臻电子设备制造有限公司 Vehicle-mounted system
CN104218305A (en) * 2013-05-30 2014-12-17 昆山骅盛电子有限公司 AM/FM (Amplitude Modulation/Frequency Modulation) power line antenna
CN205123720U (en) * 2015-11-20 2016-03-30 北京高科中天技术股份有限公司 Novel on -vehicle wireless data terminal
CN206921994U (en) * 2017-11-02 2018-01-23 上海数字电视国家工程研究中心有限公司 Antenna structure
CN107919883A (en) * 2017-11-13 2018-04-17 青岛海信移动通信技术股份有限公司 A kind of antenna assembly and mobile unit applied to mobile unit

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10258198A1 (en) * 2001-12-20 2003-07-17 Hitachi Cable Flat plate-shaped multiplex antenna and portable connection device
CN101752661A (en) * 2008-12-05 2010-06-23 索尼株式会社 Power supply device, power cable and reception device
CN201550105U (en) * 2009-11-19 2010-08-11 华为终端有限公司 Terminal and system using power line as wireless receiving antenna
CN202033847U (en) * 2011-05-25 2011-11-09 重庆南天数据资讯服务有限公司 Wireless pos machine
CN202183773U (en) * 2011-07-13 2012-04-04 上海博泰悦臻电子设备制造有限公司 Vehicle-mounted system
CN104218305A (en) * 2013-05-30 2014-12-17 昆山骅盛电子有限公司 AM/FM (Amplitude Modulation/Frequency Modulation) power line antenna
CN205123720U (en) * 2015-11-20 2016-03-30 北京高科中天技术股份有限公司 Novel on -vehicle wireless data terminal
CN206921994U (en) * 2017-11-02 2018-01-23 上海数字电视国家工程研究中心有限公司 Antenna structure
CN107919883A (en) * 2017-11-13 2018-04-17 青岛海信移动通信技术股份有限公司 A kind of antenna assembly and mobile unit applied to mobile unit

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Application publication date: 20191206