JP3829927B2 - Charger - Google Patents

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Publication number
JP3829927B2
JP3829927B2 JP2001367070A JP2001367070A JP3829927B2 JP 3829927 B2 JP3829927 B2 JP 3829927B2 JP 2001367070 A JP2001367070 A JP 2001367070A JP 2001367070 A JP2001367070 A JP 2001367070A JP 3829927 B2 JP3829927 B2 JP 3829927B2
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Japan
Prior art keywords
charging
current
electromagnet
power receiving
control means
Prior art date
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Expired - Lifetime
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JP2001367070A
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Japanese (ja)
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JP2003168485A (en
Inventor
智 園部
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Tokin Corp
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NEC Tokin Corp
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10Energy storage using batteries

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  • Details Of Connecting Devices For Male And Female Coupling (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)
  • Secondary Cells (AREA)

Description

【0001】
【発明の属する技術分野】
本発明は、充電装置に関し、とくに電池パック等の受電端子部を電磁石の作用によって固定して充電を行う充電装置に関する。
【0002】
【従来の技術】
小型の電子機器の電源として各種の電池が用いられており、携帯電話、ノートパソコン、カムコーダ等の電源として、小型で大容量の密閉型電池が用いられており、高容量のリチウム電池やリチウムイオン二次電池等の非水電解液電池が用いられている。
リチウムイオン二次電池の充電は、比較的大きな電池使用機器においては電池使用機器内部に設けた充電装置に交流電源を接続して充電が行われているが、小型、携帯型あるいは移動型の電池使用機器においては、充電装置に電池使用機器を直接装着したり、電池使用機器から取り出した電池パックを装着したり、あるいは、電池使用機器に取り付けた充電用のコードのコネクタ部を充電装置に装着することによって充電が行われている。
【0003】
これらの充電装置においては、充電時において充電装置と電池使用機器等との間の導電接続か不確実なものとなると、充電が全く行われなくなったり、接触不良による発熱が生じたり、充電が不充分となることがあった。
この様な問題点を解決するために、電池パック側あるいは充電装置側に永久磁石を設け、対応する位置には鉄片を設けて磁石の作用によって確実に固定した状態で充電する充電装置が提案された。ところが、こうした充電装置においては、電池パックと充電装置を切り離した際に、充電装置の永久磁石部に鉄粉や金属片が付着して接触が不充分となるおそれがあった。
【0004】
そこで、充電装置には、充電装置に装着する電池パックの表面に設けた鉄片と対応する位置に、充電装置の2次回路に整流ダイオードと直列に電磁石を設け、充電時のみ電磁石が作用し、電池パックを吸着するようにして、充電時以外には、金属片が付着することがない充電装置が特開昭61−170243号公報において提案されている。
【0005】
ところが、電池パックとの導電接続を確実にするために、充電時に磁界を印加していると、電池パック内の金属が磁化し、鉄等の常磁性金属を引きつけるおそれがあった。入出力端子、あるいはその近傍が磁化すると、入出力端子部に鉄等の金属が引きつけられて、短絡が発生する可能性があった。また、短絡を生じない場合にも、比較的小さな金属が入出力端子部に吸引されると、入出力端子に表面に施された金めっき等のめっき面に傷が生じたり、あるいはめっき面が摩耗するという問題点があった。
【0006】
【発明が解決しようとする課題】
本発明は、電池パック等の受電端子部を磁石の吸引力によって、吸着して固定する充電装置において、充電時以外に電池パックの入出力端子部等に磁性金属が引きつけられて短絡等が生じることがない充電装置を提供することを課題とするものである。
【0007】
【課題を解決するための手段】
本発明の課題は、受電端子部を吸引する電磁石を設けた充電装置において、受電端子部を吸引する電磁石のコイルの励磁電流制御手段を有し、充電時には励磁電流制御手段によって電磁石のコイルに着磁用直流電流が印加され、満充電時または受電端子部の取り外し時には、励磁電流制御手段によって電磁石のコイルに消磁用電流が印加される充電装置によって解決することができる。
消磁用電流が、交流電流もしくは着磁用直流電流と通電方向が反対の直流電流が通電される前記の充電装置である。
また、励磁電流制御手段は、充電端子への受電端子の装着の検出によって着磁用直流電流を供給し、満充電状態の検出もしくは受電端子部の取り外し信号によって消磁用電流を通電する前記の充電装置である。
【0008】
受電端子部が二次電池を内蔵した電池パックもしくは電池を電源とする機器に形成されたものである前記の充電装置である。
受電端子部が電池パックもしくは電池を電源とする機器に接続されたコネクタに形成されたものである前記の充電装置である。
受電端子部は、電磁石によって吸引される金属部材を装着したものである前記の充電装置である。
二次電池がリチウムイオン電池である前記の充電装置である。
【0009】
【発明の実施の形態】
本発明は、電池パック等の被充電機器の受電端子部に軟鋼等の磁性金属製の金属板を設けて電磁石による吸引作用によって引きつけて充電を行う充電装置において充電を行った後にも、被充電機器に設けた磁性金属が磁性を帯びたり、あるいは充電装置の吸引用の電磁石が磁性を帯びる現象を、消磁用の電流を通電して充電装置の吸引用の電磁石および被充電機器に設けた磁性金属を消磁することによって可能であることを見いだしたものである。
【0010】
図1は、本発明の充電装置の一実施例を説明する図である。
本発明の充電装置1は、電池パック、携帯型電池使用機器等の被充電機器2の受電端子3に対応して、充電端子4を有しており、充電端子の近傍には、電磁石5が配置されており、被充電器2の受電端子3を設けた受電端子部3Aには、軟鋼等の常磁性体からなる吸着部材6が配置されている。
そして、電磁石5には、励磁電流制御手段7から励磁電流が給電される。励磁電流制御手段7は、変圧手段8の励磁用交流電源9に接続され、また整流手段10によって整流された励磁用直流電源11に接続されている。
【0011】
充電装置1には、被充電機器2の特性に応じた充電電流、充電電圧を供給する充電制御手段12が設けられている。例えば、充電制御手段は、定電流充電機能、定電圧充電機能等を有しており、リチウムイオン電池の場合には、所定の充電電流で定電流充電を行い、電池電圧が所定の値に達した後に定電圧充電によって所定時間充電して充電完了としている。
本発明の充電装置1に電池使用機器2が装着されると、充電制御手段12は充電端子4の電圧の変化から充電を開始するとともに、充電制御手段12から充電開始信号が充電状態信号13として励磁電流制御手段7に入力される。
【0012】
励磁電流制御手段7は、電磁石5に対して着磁用の直流電流を供給すると、電池使用機器2に装着した吸着部材6が電磁石に引きつけられて、受電端子3と充電端子4とが密着して充電電流が供給される。
充電制御手段12によって所定の充電電流が供給されて満充電状態となると、充電制御手段12は、満充電を示す信号を充電状態信号13として励磁電流制御手段7に送出する。
【0013】
励磁電流制御手段7は、これまでの着磁用の直流電流に代えて、励磁用交流電源9から消磁用の交流電流を電磁石5に供給される。消磁用の電流が所定の時間供給された後に、励磁電流制御手段7は電磁石5に対する通電を停止する。一方、充電制御手段も充電電流の供給を停止する。
【0014】
また、本発明の充電装置には、充電強制停止スイッチ14を設けることが好ましい。満充電に達しない場合に充電装置1から受電端子部3Aを取り外す場合には、充電強制停止スイッチ14を押すと、充電強制停止信号15が励磁電流制御手段7に送られて電磁石5に対する着磁用の電流を停止した後に消磁用の交流電流が供給される。これによって、受電端子部の消磁が行われるとともに受電端子部の脱着が容易になる。
【0015】
図2は、本発明の他の実施例を説明する図である。
図2の充電装置は、図1の充電装置においては、交流電流を消磁電流として供給する手段を設けたものであるのに対して、整流手段から励磁用直流電流と比べて、電流値が小さな消磁用直流電源16が、励磁電流制御手段7に結合されていることを特徴としている。
消磁用直流電源からの電流は、励磁電流制御手段7によって着磁用直流電流と通電方向が逆方向となるように供給される。消磁用直流電流は、励磁用直流電流に比べて10分の1程度の電流とすることが好ましい。
図2に示した充電装置においては、交流系の回路構成が簡単なものとなるという特徴を有しており、充電装置の機器構成においては、図2に示したものが有利となる場合がある。
【0016】
図3は、充電端子部を充電装置本体から分離した実施例を説明する図である。
図3は、充電端子4、電磁石5、充電強制停止スイッチ14を設けた、充電ユニット15を充電装置本体とは分離して配置し、本体接続用コード16によって接続した例を示す図である。
充電端子4には、受電コネクタ17の受電端子3が導電接続し、受電コネクタ17に接続した機器接続用コード18を通じて、図1あるいは図2に示した例と同様に充電が行われる。また、受電コネクタ17の受電端子部3Aには、軟鋼等の常磁性金属からなる吸着部材6が設けられており、充電時には電磁石によって吸着が行われ、満充電時あるいは、充電強制停止スイッチの動作によって強制的に充電を停止する際には、消磁電流が通電されて消磁が行われる。
【0017】
また、以上の説明では、電池パック等の電池使用機器への充電について説明をしたが、電気自動車の電池の充電用の充電装置、あるいは電気二重層キャパシタを用いた機器等の充電装置においても同様に適用することができる。
【0018】
【発明の効果】
本発明の充電装置は、電池パック等の被充電機器の受電端子部を電磁石によって吸引した状態で充電を行うことができるので、安全確実に発熱等を起こすことなく充電を行うと共に、電磁石によって着磁した部材を消磁したので、磁性金属が不用意に吸着して短絡を生じる等の問題を生じることがない被充電機器を適用することができる。
【図面の簡単な説明】
【図1】図1は、本発明の充電装置の一実施例を説明する図である。
【図2】図2は、本発明の他の実施例を説明する図である。
【図3】図3は、充電端子部を充電装置本体から分離した実施例を説明する図である。
【符号の説明】
1…充電装置、2…被充電機器、3…受電端子、3A…受電端子部、4…充電端子、5…電磁石、6…吸着部材、7…励磁電流制御手段、8…変圧手段、9…励磁用交流電源、10…整流手段、11…励磁用直流電源、12…充電制御手段、13…充電状態信号、14…充電強制停止スイッチ、15…充電強制停止信号、16…消磁用直流電源、17…充電ユニット、18…本体接続用コード、19…受電コネクタ、20…機器接続用コード
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a charging device, and more particularly to a charging device that performs charging by fixing a power receiving terminal portion such as a battery pack by the action of an electromagnet.
[0002]
[Prior art]
Various types of batteries are used as power sources for small electronic devices, and small and large-capacity sealed batteries are used as power sources for mobile phones, notebook computers, camcorders, etc. Nonaqueous electrolyte batteries such as secondary batteries are used.
Lithium-ion secondary batteries are charged by connecting an AC power source to a charging device provided inside the battery-powered device in a relatively large battery-powered device. However, the battery is a small, portable or mobile battery. In the device used, attach the battery-powered device directly to the charging device, attach the battery pack removed from the battery-powered device, or attach the connector part of the charging cord attached to the battery-powered device to the charging device. Charging is done by doing.
[0003]
In these charging devices, if the conductive connection between the charging device and the battery-powered device becomes uncertain during charging, charging is not performed at all, heat is generated due to poor contact, or charging is not possible. Sometimes it was enough.
In order to solve such problems, there has been proposed a charging device in which a permanent magnet is provided on the battery pack side or the charging device side, and an iron piece is provided at a corresponding position and the battery is securely fixed by the action of the magnet. It was. However, in such a charging device, when the battery pack and the charging device are separated, iron powder or metal pieces may adhere to the permanent magnet portion of the charging device, resulting in insufficient contact.
[0004]
Therefore, the charging device is provided with an electromagnet in series with the rectifier diode in the secondary circuit of the charging device at a position corresponding to the iron piece provided on the surface of the battery pack attached to the charging device, and the electromagnet acts only during charging, Japanese Patent Application Laid-Open No. 61-170243 proposes a charging device that adsorbs a battery pack so that metal pieces do not adhere except during charging.
[0005]
However, if a magnetic field is applied during charging in order to ensure a conductive connection with the battery pack, the metal in the battery pack may be magnetized to attract a paramagnetic metal such as iron. When the input / output terminal or the vicinity thereof is magnetized, a metal such as iron is attracted to the input / output terminal portion, which may cause a short circuit. In addition, even when a short circuit does not occur, if a relatively small metal is sucked into the input / output terminal part, the plated surface such as gold plating applied to the surface of the input / output terminal may be scratched or the plated surface may be There was a problem of wear.
[0006]
[Problems to be solved by the invention]
The present invention provides a charging device in which a power receiving terminal portion of a battery pack or the like is attracted and fixed by an attractive force of a magnet, and a magnetic metal is attracted to an input / output terminal portion or the like of the battery pack other than during charging to cause a short circuit or the like. It is an object of the present invention to provide a charging device that does not occur.
[0007]
[Means for Solving the Problems]
An object of the present invention is to provide a charging device provided with an electromagnet that attracts the power receiving terminal portion, including excitation current control means for the electromagnet coil that attracts the power receiving terminal portion, and when charging, the excitation current control means attaches the coil to the electromagnet coil. This can be solved by a charging device in which a magnetizing DC current is applied and the demagnetizing current is applied to the coil of the electromagnet by the exciting current control means when fully charged or when the power receiving terminal is removed.
In the above-described charging device, the demagnetizing current is supplied with an alternating current or a direct current with a direction opposite to that of the magnetizing direct current.
The exciting current control means supplies the magnetizing DC current by detecting the attachment of the power receiving terminal to the charging terminal, and supplies the demagnetizing current by detecting the full charge state or by removing the power receiving terminal portion. Device.
[0008]
In the charging device described above, the power receiving terminal portion is formed in a battery pack having a built-in secondary battery or a battery-powered device.
In the above charging device, the power receiving terminal portion is formed on a connector connected to a battery pack or a battery powered device.
The power receiving terminal portion is the above-described charging device to which a metal member attracted by an electromagnet is attached.
It is the said charging device whose secondary battery is a lithium ion battery.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
The present invention provides a charging device in which a metal plate made of a magnetic metal such as mild steel is provided at a power receiving terminal portion of a device to be charged such as a battery pack and is charged by attraction by an electromagnet to perform charging. The magnetic metal provided in the device is magnetized, or the phenomenon that the charging device's suction electromagnet is magnetized, the demagnetizing current is applied to the charging device's suction magnet and the device to be charged. It has been found that this is possible by demagnetizing the metal.
[0010]
FIG. 1 is a diagram for explaining an embodiment of the charging device of the present invention.
The charging device 1 of the present invention has a charging terminal 4 corresponding to a power receiving terminal 3 of a device 2 to be charged such as a battery pack or a portable battery using device, and an electromagnet 5 is provided in the vicinity of the charging terminal. The attracting member 6 made of a paramagnetic material such as mild steel is disposed on the power receiving terminal portion 3A provided with the power receiving terminal 3 of the charger 2.
An excitation current is supplied to the electromagnet 5 from the excitation current control means 7. The exciting current control means 7 is connected to the exciting AC power supply 9 of the transformer means 8 and is connected to the exciting DC power supply 11 rectified by the rectifying means 10.
[0011]
The charging device 1 is provided with charging control means 12 for supplying a charging current and a charging voltage according to the characteristics of the device to be charged 2. For example, the charging control means has a constant current charging function, a constant voltage charging function, etc. In the case of a lithium ion battery, the charging control means performs constant current charging with a predetermined charging current, and the battery voltage reaches a predetermined value. After that, charging is performed for a predetermined time by constant voltage charging to complete charging.
When the battery using device 2 is attached to the charging device 1 of the present invention, the charging control means 12 starts charging from a change in the voltage of the charging terminal 4, and a charging start signal is sent from the charging control means 12 as a charging state signal 13. Input to the excitation current control means 7.
[0012]
When the exciting current control means 7 supplies a direct current for magnetization to the electromagnet 5, the attracting member 6 attached to the battery-operated device 2 is attracted to the electromagnet, and the power receiving terminal 3 and the charging terminal 4 are brought into close contact with each other. Charging current is supplied.
When a predetermined charging current is supplied by the charging control means 12 and a full charging state is reached, the charging control means 12 sends a signal indicating full charging to the exciting current control means 7 as a charging state signal 13.
[0013]
The exciting current control means 7 is supplied with demagnetizing AC current from the exciting AC power supply 9 to the electromagnet 5 in place of the conventional DC current for magnetization. After the demagnetizing current is supplied for a predetermined time, the excitation current control means 7 stops energization of the electromagnet 5. On the other hand, the charging control means also stops supplying the charging current.
[0014]
Moreover, it is preferable to provide the charge forced stop switch 14 in the charging device of this invention. When the power receiving terminal portion 3A is removed from the charging device 1 when full charge is not reached, when the forced charge stop switch 14 is pressed, a forced charge stop signal 15 is sent to the excitation current control means 7 to magnetize the electromagnet 5. An AC current for demagnetization is supplied after the current for current is stopped. As a result, the power receiving terminal portion is demagnetized and the power receiving terminal portion is easily attached and detached.
[0015]
FIG. 2 is a diagram for explaining another embodiment of the present invention.
The charging device of FIG. 2 is provided with means for supplying an alternating current as a degaussing current in the charging device of FIG. 1, but the current value is smaller than the direct current for excitation from the rectifying means. A demagnetizing DC power supply 16 is coupled to the excitation current control means 7.
The current from the demagnetizing DC power supply is supplied by the exciting current control means 7 so that the energizing direction is opposite to the magnetizing DC current. The demagnetizing DC current is preferably about 1/10 of the exciting DC current.
The charging device shown in FIG. 2 has a feature that the circuit configuration of the AC system is simple, and in the device configuration of the charging device, the one shown in FIG. 2 may be advantageous. .
[0016]
FIG. 3 is a diagram illustrating an embodiment in which the charging terminal portion is separated from the charging device main body.
FIG. 3 is a diagram illustrating an example in which the charging unit 15 provided with the charging terminal 4, the electromagnet 5, and the charging forced stop switch 14 is arranged separately from the charging device main body and connected by the main body connecting cord 16.
The power receiving terminal 3 of the power receiving connector 17 is conductively connected to the charging terminal 4, and charging is performed through the device connection cord 18 connected to the power receiving connector 17 as in the example shown in FIG. 1 or FIG. Further, the power receiving terminal portion 3A of the power receiving connector 17 is provided with an adsorption member 6 made of a paramagnetic metal such as mild steel, and is attracted by an electromagnet at the time of charging. When the charging is forcibly stopped by deenergizing, degaussing current is applied and demagnetization is performed.
[0017]
In the above description, charging to a battery using device such as a battery pack has been described. However, the same applies to a charging device for charging a battery of an electric vehicle or a charging device such as a device using an electric double layer capacitor. Can be applied to.
[0018]
【The invention's effect】
Since the charging device of the present invention can perform charging while the power receiving terminal portion of a device to be charged such as a battery pack is attracted by an electromagnet, the charging device can be charged safely and securely without causing heat generation, and can be attached by an electromagnet. Since the magnetized member is demagnetized, it is possible to apply a device to be charged that does not cause a problem such as a magnetic metal being inadvertently attracted to cause a short circuit.
[Brief description of the drawings]
FIG. 1 is a diagram illustrating an embodiment of a charging device according to the present invention.
FIG. 2 is a diagram for explaining another embodiment of the present invention.
FIG. 3 is a diagram illustrating an embodiment in which a charging terminal portion is separated from a charging device main body.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Charging apparatus, 2 ... Charged apparatus, 3 ... Power receiving terminal, 3A ... Power receiving terminal part, 4 ... Charging terminal, 5 ... Electromagnet, 6 ... Adsorption member, 7 ... Excitation current control means, 8 ... Transformer means, 9 ... Excitation AC power supply, 10 ... rectifying means, 11 ... excitation DC power supply, 12 ... charge control means, 13 ... charge state signal, 14 ... charge forced stop switch, 15 ... charge forced stop signal, 16 ... demagnetization DC power supply, 17 ... Charging unit, 18 ... Main unit connection cord, 19 ... Power receiving connector, 20 ... Device connection cord

Claims (1)

受電端子部を吸引する電磁石を設けた充電装置において、受電端子部を吸引する電磁石のコイルの励磁電流制御手段を有し、充電時には励磁電流制御手段によって電磁石のコイルに着磁用直流電流が印加され、満充電時または受電端子部の取り外し時には、励磁電流制御手段によって電磁石のコイルに消磁用電流が印加されることを特徴とする充電装置。A charging device provided with an electromagnet that attracts the power receiving terminal portion has an excitation current control means for the coil of the electromagnet that attracts the power receiving terminal portion, and a DC current for magnetization is applied to the coil of the electromagnet by the excitation current control means during charging. And a demagnetizing current applied to the coil of the electromagnet by the exciting current control means when fully charged or when the power receiving terminal is removed.
JP2001367070A 2001-11-30 2001-11-30 Charger Expired - Lifetime JP3829927B2 (en)

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US7026789B2 (en) * 2003-12-23 2006-04-11 Motorola, Inc. Charging system for electronic devices
US7019491B2 (en) * 2004-04-08 2006-03-28 Motorola, Inc. Method and apparatus for indication of a charging condition
JP4837457B2 (en) * 2006-06-29 2011-12-14 京セラ株式会社 Cradle device and method for controlling portable electronic device having geomagnetic sensor
JP5111061B2 (en) * 2007-11-08 2012-12-26 シャープ株式会社 Connection device
JP5117904B2 (en) * 2008-03-26 2013-01-16 パナソニック株式会社 Holding structure for chargers of small electrical equipment
KR101246878B1 (en) * 2011-02-11 2013-03-25 (주)에스피에스 Charging device using magnet
US8920178B2 (en) 2011-12-01 2014-12-30 Htc Corporation Electronic apparatus assembly
CN102801044B (en) * 2012-08-23 2016-02-10 上海摩软通讯技术有限公司 Connector and electronic equipment
CN108063342A (en) * 2017-12-18 2018-05-22 帅竞贤 A kind of sweeping robot charging adapter assembly automatically controlled
CN108110579A (en) * 2017-12-18 2018-06-01 帅竞贤 A kind of sweeping robot charging locking type charging adapter assembly
CN108110457A (en) * 2017-12-18 2018-06-01 帅竞贤 The charging adapter assembly that a kind of sweeping robot charged with the high stable high life
CN108011253A (en) * 2017-12-18 2018-05-08 帅竞贤 A kind of sweeping robot charging locking type charging switching device automatic control system
CN111049951B (en) * 2018-10-12 2021-07-23 北京小米移动软件有限公司 Terminal assembling method and device
CN111546912B (en) * 2020-05-22 2024-05-03 上海芝松航空科技有限公司 Elastic contact magnetic attraction type charging unit
JP7495361B2 (en) 2021-01-19 2024-06-04 ヤーマン株式会社 Connecting Devices

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