WO2007138669A1 - Adaptateurs ca et dispositif terminal mobile - Google Patents

Adaptateurs ca et dispositif terminal mobile Download PDF

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Publication number
WO2007138669A1
WO2007138669A1 PCT/JP2006/310690 JP2006310690W WO2007138669A1 WO 2007138669 A1 WO2007138669 A1 WO 2007138669A1 JP 2006310690 W JP2006310690 W JP 2006310690W WO 2007138669 A1 WO2007138669 A1 WO 2007138669A1
Authority
WO
WIPO (PCT)
Prior art keywords
antenna
adapter
terminal device
mobile terminal
coil
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.)
Ceased
Application number
PCT/JP2006/310690
Other languages
English (en)
Japanese (ja)
Inventor
Iwao Matuura
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.)
Panasonic Corp
Panasonic Holdings Corp
Original Assignee
Panasonic Corp
Matsushita Electric Industrial 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.)
Filing date
Publication date
Application filed by Panasonic Corp, Matsushita Electric Industrial Co Ltd filed Critical Panasonic Corp
Priority to PCT/JP2006/310690 priority Critical patent/WO2007138669A1/fr
Publication of WO2007138669A1 publication Critical patent/WO2007138669A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

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
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
    • H04B1/3827—Portable transceivers
    • H04B1/3883—Arrangements for mounting batteries or battery chargers

Definitions

  • the present invention relates to an AC adapter, and a portable terminal device including a connector connected to the AC adapter and a communication function.
  • an AC adapter is used as a power supply means for charging a secondary battery in addition to supplying power to an electronic device.
  • Specific examples include power supplies for LCD monitors of computers, power supplies for charging electronic devices equipped with secondary batteries such as mobile phones, digital cameras, video movies, and notebook computers.
  • switching power supply systems have become mainstream.
  • FIG. 11 shows an example of a conventional AC adapter for a mobile phone.
  • the AC adapter 100 includes a connector unit 101, a cord 102, an AC / DC conversion unit 103, and an AC plug 104.
  • Patent Document 1 Japanese Patent Laid-Open No. 62-235825
  • Patent Document 2 Japanese Unexamined Patent Application Publication No. 2004-363738 (Page 10, Fig. 4)
  • the frequency band is dedicated to FM, and cannot cope with a wide band frequency. Also, AC adapter cord Since the whole is an antenna, the frequency cannot be adjusted. In particular, recent mobile phones are equipped with receivers such as AM, FM, and TV, and antennas with a wide frequency band are required.
  • a mobile terminal device such as a mobile phone
  • the physical installation space of the antenna is limited due to the downsizing of the device.
  • the number of mobile phones with built-in antennas is increasing, and it is becoming a tough condition to improve antenna performance.
  • multiple antennas are required, including the widening of communication frequencies such as dual band and triple band for effective frequency use.
  • the communication antenna and the broadcast receiving antenna are required to operate simultaneously, and interference and isolation between the communication antenna and the broadcast receiving antenna become a problem.
  • the present invention has been made to solve such a problem.
  • a dedicated external antenna can be connected when the AC adapter is connected. It is an object of the present invention to provide an AC adapter and a portable terminal device that can ensure stable reception or communication.
  • the AC adapter of the present invention includes a connector portion connected to the portable terminal device, a plug connected to an AC outlet, a conversion portion that converts alternating current into direct current, and a cord that connects the connector portion and the conversion portion.
  • a parallel wire is wired inside the cord, and a high-frequency cutoff coil is provided at an arbitrary position on the parallel wire.
  • the AC adapter of the present invention includes a high frequency cutoff coil at a different position for each of two or more of the parallel wires.
  • the position of the high-frequency cutoff coil on the parallel wire is (1Z4) wavelength from the feeding point of the antenna according to the band of the used frequency.
  • the wiring material from the conversion unit that converts the alternating current to direct current to the high-frequency cutoff coil on the parallel wire that is the shortest is a shield wire.
  • the AC adapter of the present invention includes a connector portion connected to the mobile terminal device, a plug connectable to the AC outlet, a conversion portion that converts alternating current into direct current, the connector portion, and the conversion portion.
  • a power supply line and an antenna line functioning as an external antenna are provided separately inside the cord.
  • the antenna wire has a configuration in which a power supply voltage is superimposed, a high-frequency cutoff coil, a switch for bypassing the high-frequency cutoff coil, and a superposition on the antenna wire. And a control circuit for switching the switch according to the power supply voltage.
  • the AC adapter of the present invention has a wavelength of (1Z4) from the feeding point of the antenna in accordance with the band of the full length force usage frequency of the antenna line.
  • the AC adapter according to the present invention is provided with a noise removing ferrite fixed at a position immediately after the conversion unit.
  • a mobile terminal device of the present invention is a mobile terminal device having a connector for connecting the AC adapter according to any one of the above and an internal antenna, wherein the AC adapter is connected.
  • the antenna of the mobile terminal device is switched from the internal antenna to the external antenna built in the AC adapter.
  • the mobile terminal device of the present invention is connected to the AC adapter according to any of the above.
  • a mobile terminal device having a connector and an internal antenna, the detection unit detecting that the AC adapter is connected, the internal antenna force, the antenna switching unit for switching to the external antenna, and the antenna detection unit.
  • An antenna switching control unit that controls the antenna switching unit based on the detected signal, and when the AC adapter is connected, the antenna switching control unit switches the internal antenna force to the external antenna on the AC adapter side. It is configured to be replaced.
  • the antenna of the mobile terminal device is switched from the internal antenna on the mobile terminal device side to the external antenna built in the AC adapter.
  • the mobile terminal device of the present invention has a power supply control supply unit for controlling a power supply voltage superimposed on the antenna line, and when the AC adapter is connected, the antenna switching control unit causes the internal switching control unit to 12.
  • the power control supply unit of the mobile terminal device controls the switch for bypassing the high-frequency cutoff coil inside the AC adapter.
  • the stopper for limiting the frequency for easily selecting the use frequency is provided.
  • an identification display for identifying according to the band of the used frequency it is possible to provide a mobile terminal device that can easily tune to a desired frequency by easily moving the ferrite.
  • FIG. 1 is an explanatory diagram of an AC adapter according to the first embodiment of the present invention.
  • FIG. 1 shows an AC adapter 10 according to a first embodiment of the present invention, and this AC adapter 10 is connected to a mobile terminal device not shown.
  • the AC adapter 10 of this embodiment includes a connector part 11, a cord 12, a parallel wire (hereinafter referred to as “A wire”) 13, a parallel wire (hereinafter referred to as “B wire”) 14, and a high-frequency shield.
  • a disconnecting coil (hereinafter referred to as “A coil”) 15, a high-frequency cutoff coil (hereinafter referred to as “B coil”) 16, an AC plug 17, and an AC / DC converter 18 are provided.
  • the connector part 11 is detachably attached to a connector part provided in a mobile terminal device (not shown).
  • the cord 12 electrically connects the connector part 11 and the ACZDC conversion part 18.
  • the A wire 13 and the B wire 14 are used for the internal wiring of the cord 12.
  • the wire is not limited to A and B, but may be composed of two or more wires.
  • the A coil 15 and the B coil 16 are installed at different positions in the A wire 13 and the B wire 14, respectively. That is, the A coil 15 and the B coil 16 on the A wire 13 and the B wire 14 are respectively (1Z4) ⁇ (provided that ⁇ is a wavelength) from the feeding point of the antenna according to the band of the frequency (f) used It is provided at the position.
  • the ACZDC converter 18 converts AC, which is a commercial power source, into DC, and an AC plug 17 is integrally attached.
  • the AC plug 17 and the AC / DC converter 18 are integrated, and the AC power from the AC plug 17 connected to the commercial power source is converted to DC power by the ACZDC converter 18. Also, the output of the converted DC power supply is supplied to the connector section 11 by the code 12.
  • the AC adapter 10 is inserted at arbitrary positions of the A wire 13 and the B wire 14 respectively in the A coil 15 and B coil 16 forces. Therefore, by adjusting the insertion positions of the A coil 15 and the B coil 16 so that the electrical length from the antenna feeding point inside the portable terminal device (not shown) to the A coil 15 and the B coil 16 becomes the entire length of the antenna. It becomes possible to tune to the desired frequency. As described above, by setting the positions of the A coil 15 and the B coil 16 to different points, an antenna corresponding to a band of two frequencies can be set.
  • the frequency range of the A coil 15 and the B coil 16 is, for example, 76 MHz to 770 MHz, high frequency can be cut off by a coil of about 100 ⁇ to 10 / ⁇ ⁇ .
  • the frequency at which AC adapter 10 cord 12 is used as an antenna is 76 to 90 MHz for FM radio, 1 to 12 channels for VHF TV, 90 to 222 MHz for UHF TV, and 13 to 62 channels for UHF TV. 470-770MHz.
  • the antenna is the electrical length from the antenna feeding point inside the mobile terminal device to the A coil 15 and the B coil 16, the total length of the antenna is (1Z4) ⁇ , and in the case of FM radio, 0.9. ⁇ 0.83m, for VHF TV 0.83 ⁇ 0.34m, for UHF TV
  • FIG. 2 shows an AC adapter 20 according to the second embodiment of the present invention.
  • the AC adapter 20 includes a connector part 11, a cord 12, an A wire 13, a B wire 14, an A coil 15, and a B coil. 16
  • a shield wire 21, a positive terminal 22, and a negative terminal 23 are provided.
  • the shield wire 21 is wired from the ACZDC converter 18 to the vicinity of the A coil 15 or the B coil 16. That is, in the A wire 13 and B wire 14 used for the internal wiring of the cord 12, between the AC / DC converter 18 and the A coil 15 and B coil 16, a shield wire (metal mesh wire) is used. Make it hard to be affected by the external electric field! In other words, by using the shield wire 21, the switching noise generated from the AC / DC converter 18 is reduced from being radiated by the cord 12.
  • FIG. 3 shows an AC adapter 30 according to the third embodiment of the present invention.
  • the AC adapter 30 includes a connector part 11, a cord 12, an AC plug 17, an ACZDC conversion part 18, a shielded wire 21, and a positive electrode.
  • an antenna line A hereinafter referred to as “A antenna line” 31 and an antenna line B (hereinafter referred to as “B antenna line”) 32 are provided.
  • the shield wire 21 is wired from the ACZDC conversion unit 18 to the connector unit 11. By using this shield line 21, the switching noise generated from the ACZDC converter 18 is reduced from being radiated by the cord 12 as in the second embodiment.
  • the A antenna line 31 and the B antenna line 32 are formed to have different lengths so that different frequencies are obtained. Set it so that it can be tuned by number.
  • the electrical length from the antenna feeding point inside the mobile terminal device (not shown) to the A antenna line 31 and the B antenna line 32 is adjusted to be the total length of the antenna. It becomes possible to tune to a desired frequency. In other words, by forming the A antenna line 31 and the B antenna line 32 in different lengths, an antenna corresponding to a two-frequency band can be realized.
  • FIG. 4 shows an AC adapter 40 according to the fourth embodiment of the present invention.
  • the AC adapter 40 according to the present embodiment is characterized by the A antenna line 31 and the B antenna in the third embodiment.
  • Line 32 is replaced with one antenna line (hereinafter referred to as C antenna line) 33, and power is superimposed on C antenna line 33 so that it can handle multiple frequency bands of 2 or more. It is characterized by switching the total length.
  • the AC adapter 40 of the present embodiment includes a control circuit (hereinafter referred to as “a control circuit”) 41, a control circuit (hereinafter referred to as “b control circuit”) 42, and a control in the cord 12.
  • the AC adapter 40 of the present embodiment is controlled to be tuned to four frequency bands, as shown in FIG.
  • aControl circuit 41 is a control circuit that operates ON at less than 2.5V and operates OFF at 2.5V or more, and controls SW1. That is, when SW1 is OFF, a predetermined frequency is cut off by the a coil 44 inserted in series with the C antenna line 33, and when SW1 is ON, it operates as a part of the C antenna line 33.
  • the a coil 44 is a high-frequency cutoff coil that cuts off the 900 MHz band.
  • the b control circuit 42 is a control circuit that turns ON when the voltage is less than 1.5V and is OFF when the voltage is 1.5V or more, and controls SW2.
  • the b coil 45 is a high frequency cutoff coil that cuts off the 400 MHz band.
  • the c control circuit 43 is a control circuit that is turned on when the voltage is less than 0.5V and is turned off when the voltage is 0.5V or more, and controls SW3. That is, when SW3 is OFF, a predetermined frequency is cut off by the c coil 46 inserted in series with the C antenna line 33, and when SW3 is ON, it operates as a part of the C antenna line 33.
  • the c-coil 46 is a high-frequency cutoff coil that cuts off the 160 MHz band.
  • the entire length of the C antenna line 33 operates as an antenna, and in this case, it is tuned to 80 MHz.
  • the four tuning frequencies described here can be freely set by appropriately selecting the inductance value of the high frequency cutoff coil and the total length of the C antenna line 33 without being limited to these frequencies. it can.
  • FIG. 6 shows an AC adapter 50 according to the fifth embodiment of the present invention.
  • the AC adapter 50 according to the present embodiment includes a connector part 11, a cord 12, an AC plug 107, and an ACZDC conversion part 18.
  • a flight 51 is provided.
  • This ferrite 51 is for removing the noise of the switching power supply used in the AC / DC converter 18, and is placed close to the output side of the ACZDC converter 18. It is effective.
  • the ferrite 51 is provided in the present invention, since the cord 12 is used as an antenna in particular, so that the harmonics of the switching power supply are likely to be mixed into the receiver front end via the antenna. Because.
  • FIG. 7 shows a mobile terminal device 60 and an AC adapter constituting a mobile terminal device according to a sixth embodiment of the present invention.
  • FIG. 20 is a partial configuration diagram showing a main part when 20) is connected to the mobile terminal device 60.
  • the mobile terminal device 60 includes high-frequency cutoff coils 61A and 61B, capacitors 62A and 62B, a positive power supply terminal 63, a GND terminal 64, and antenna terminals 65A and 65B.
  • the high-frequency cutoff coil 61A is inserted in the positive power supply line and connected to the positive power supply terminal 63.
  • the capacitor 62A is inserted into the positive power supply line and is connected to the antenna terminal 65A.
  • the high-frequency cutoff coil 61B is inserted in the negative power supply line and connected to the GND terminal 64.
  • the capacitor 62B is inserted in the negative power supply line and connected to the antenna terminal 65B.
  • the antenna terminal 65A and the antenna terminal 65B correspond to two different frequency bands. Further, when the frequency range is, for example, 76 MHz to 770 MHz, the capacitor 62A and the capacitor 62B can pass the corresponding frequency with almost no attenuation by using a capacitor of about 1000 pF to 0.01 F. Capacitor 62A and capacitor 62B have a DC cut as well as a front end or switch due to static electricity. RU
  • FIG. 8 shows a mobile terminal device according to a sixth embodiment of the present invention, in which the AC adapter 10 of the first embodiment (or the AC adapter 20 of the second embodiment) is connected.
  • the overall configuration when connected to the mobile terminal device 60 is shown.
  • the AC adapter 10 includes an ACZDC converter 18, a cord 12, a cord antenna 33 (31, 32), and a connector 11.
  • the mobile terminal device 60 has a connector 71, an AC adapter insertion detector 72, and a power antenna separation.
  • the AC adapter insertion detection unit 72 can detect whether or not the AC adapter 10 is connected to the mobile terminal device 60 even when the AC adapter 10 is not connected to an outlet.
  • the power antenna separation unit 73 has means for separating the built-in antenna 77 and the cord antennas 31 and 32 of the AC adapter 10.
  • the antenna switching unit 74 operates and switches from the built-in antenna (internal antenna) 77 to the cord antenna (external antenna) 13 or 14 on the AC adapter side. That is, according to the present embodiment, simply by connecting the AC adapter 10 to the mobile terminal device 60, the antenna of the mobile terminal device is automatically switched from the built-in antenna 77 to one of the cord antennas 13 and 14. Can do.
  • FIG. 9 shows a mobile terminal device 60 and an AC adapter 30 constituting a mobile terminal device according to the seventh embodiment of the present invention.
  • the AC adapter 30 of the third embodiment shown in FIG. FIG. 6 is a partial configuration diagram showing a main part when connected to a mobile terminal device 60.
  • the two parallel wires 31 and 32 in the cord 12 of the AC adapter 30 are connected to the antenna terminal 81 and the antenna terminal 82, respectively. It is connected to the.
  • the antenna terminal 81 and the antenna terminal 82 correspond to two different frequency bands.
  • the positive terminal 22 and the negative terminal 23 in the shielded wire 21 in the cord 12 are connected to the positive power supply terminal 83 and the GND terminal 84, respectively.
  • FIG. 10 shows the overall configuration of the mobile terminal device 60 and the AC adapter 30 that constitute the mobile terminal device according to the sixth embodiment of the present invention.
  • FIG. 10 shows the configuration of the third embodiment shown in FIG. 4 is a block diagram when the AC adapter 30 is connected to the mobile terminal device 60.
  • FIG. Shown in Figure 10 The mobile terminal device of this embodiment differs from the mobile terminal device shown in FIG. 8 in that the AC adapter 30 has a power line (shielded wire 21 shown in FIG. 3) and a cord antenna (A antenna line shown in FIG. 3). 31 and the B antenna line 32) are separated from each other, and therefore, the power supply antenna separation unit 73 is not required inside the portable terminal device 60.
  • FIG. 11 shows a mobile terminal device 60 and an AC adapter 30 that constitute a mobile terminal device according to a seventh embodiment of the present invention.
  • the AC adapter 40 of the fourth embodiment shown in FIG. FIG. 6 is a partial configuration diagram showing a main part when connected to a main body 60.
  • the antenna wire 33 in the cord 12 of the AC adapter 40 passes through the high-frequency cutoff coil 85 and goes to the power control supply part 86. It is connected.
  • the power control supply unit 86 outputs a preset voltage for each frequency band. By changing this voltage, the electrical length of the antenna wire 33 inside the cord 12 can be changed, and the frequency band can be changed.
  • the antenna wire 33 passes through the capacitor 87 and is connected to the antenna terminal 88.
  • the power supply line as in the seventh embodiment shown in FIG. 9, the positive terminal 22 and the negative terminal 23 in the shield line 21 in the cord 12 are connected to the positive power supply terminal 83 and the GND terminal 84, respectively. Has been.
  • FIG. 12 shows the overall configuration of the mobile terminal device 60 and the AC adapter 40 constituting the mobile terminal device according to the eighth embodiment of the present invention.
  • the AC adapter 40 of the fourth embodiment is shown in FIG. 3 is a block diagram when connected to a mobile terminal device 60.
  • FIG. 3 is a block diagram when connected to a mobile terminal device 60.
  • the mobile terminal device uses a power cord control and supply unit 86 so that a single cord antenna can handle a plurality of frequency bands.
  • a control circuit 41, b control circuit 42 and c control circuit 4 shown in Fig. 4 By controlling the control circuit inside the adapter 40 (a control circuit 41, b control circuit 42 and c control circuit 4 shown in Fig. 4) and operating this control circuit, it opens and closes at a specific voltage as shown in Fig. 5. Switch ONZOFF of SW1, SW2 and SW3 as appropriate. In this way, power is supplied to the cord antenna (combined as a single C antenna line 33), and multiple frequency bands can be varied.
  • the present invention makes it possible to easily realize stable communication by providing an antenna function to an AC adapter connected as a power supply to a portable terminal device having a communication function. It is useful for mobile terminal devices equipped with various applications such as TV, wireless LAN, Bluetooth, RFID, etc.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)

Abstract

L'extension des fonctions de communication exige que les dispositifs terminaux mobiles dotés de fonctions de communication soient équipés d'une variété d'applications telle que la radio, la télé, un réseau LAN sans fil, Bluetooth et RFID. Entre autres, un adaptateur CA connecté à un dispositif terminal mobile permet d'obtenir une communication ou une réception stable. L'insertion (connexion) d'un connecteur (11) de l'adaptateur CA (10) dans le dispositif terminal mobile permet de commuter une antenne du mode antenne interne au mode antenne externe qui utilise les fils parallèles (fil A (13) et fil B (14)) d'un cordon (12) de l'adaptateur CA 10. Le changement des positions de bobines de coupure de fréquence radio (bobine A (15) et bobine B (16)) permet d'accorder l'antenne en réponse à une fréquence cible et de protéger la communication ou réception stable.
PCT/JP2006/310690 2006-05-29 2006-05-29 Adaptateurs ca et dispositif terminal mobile Ceased WO2007138669A1 (fr)

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Application Number Priority Date Filing Date Title
PCT/JP2006/310690 WO2007138669A1 (fr) 2006-05-29 2006-05-29 Adaptateurs ca et dispositif terminal mobile

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Application Number Priority Date Filing Date Title
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Cited By (9)

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JP2009152955A (ja) * 2007-12-21 2009-07-09 Sony Corp 放送信号結合装置
WO2010036786A1 (fr) * 2008-09-29 2010-04-01 Corning Cable Systems Llc Ensemble connecteur de fibres optiques muni d’une antenne rfid filaire
JP2010141867A (ja) * 2008-12-10 2010-06-24 Gigabyte Communications Inc アンテナと電子装置
JP2010157991A (ja) * 2008-12-05 2010-07-15 Sony Corp 電源装置、電源ケーブル、および受信装置
CN101847777A (zh) * 2009-03-24 2010-09-29 索尼公司 接收装置
CN102422489A (zh) * 2009-05-20 2012-04-18 索尼公司 天线装置
US8410909B2 (en) 2010-07-09 2013-04-02 Corning Incorporated Cables and connector assemblies employing a furcation tube(s) for radio-frequency identification (RFID)-equipped connectors, and related systems and methods
WO2013109247A1 (fr) * 2012-01-17 2013-07-25 Thomson Licensing Antenne rf de câble d'alimentation de commande à distance
CN110611150A (zh) * 2019-08-30 2019-12-24 联想(北京)有限公司 配置设备及电子设备

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JP2009152955A (ja) * 2007-12-21 2009-07-09 Sony Corp 放送信号結合装置
WO2010036786A1 (fr) * 2008-09-29 2010-04-01 Corning Cable Systems Llc Ensemble connecteur de fibres optiques muni d’une antenne rfid filaire
JP2010157991A (ja) * 2008-12-05 2010-07-15 Sony Corp 電源装置、電源ケーブル、および受信装置
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CN102422489A (zh) * 2009-05-20 2012-04-18 索尼公司 天线装置
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CN102422489B (zh) * 2009-05-20 2015-03-25 索尼公司 天线装置
US8410909B2 (en) 2010-07-09 2013-04-02 Corning Incorporated Cables and connector assemblies employing a furcation tube(s) for radio-frequency identification (RFID)-equipped connectors, and related systems and methods
WO2013109247A1 (fr) * 2012-01-17 2013-07-25 Thomson Licensing Antenne rf de câble d'alimentation de commande à distance
CN110611150A (zh) * 2019-08-30 2019-12-24 联想(北京)有限公司 配置设备及电子设备

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