JP2015002580A - Wireless charging device - Google Patents

Wireless charging device Download PDF

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JP2015002580A
JP2015002580A JP2013124722A JP2013124722A JP2015002580A JP 2015002580 A JP2015002580 A JP 2015002580A JP 2013124722 A JP2013124722 A JP 2013124722A JP 2013124722 A JP2013124722 A JP 2013124722A JP 2015002580 A JP2015002580 A JP 2015002580A
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power
core
charger
portable device
coil
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海老原　照夫
Teruo Ebihara
照夫 海老原
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Seiko Instruments Inc
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Abstract

PROBLEM TO BE SOLVED: To provide a wireless charging device that allows efficiently charging a small portable device by a portable charger.SOLUTION: A wireless charging device of the present invention is composed of a charger 13 and a portable device 7. The charger 13 has a power-feeding cut core 8 around which a power-feeding coil 9 is wounded, a transmission circuit section 10, and a power supply 12 capable of power feeding, and is housed in a first outer case 11. The portable device 7 has a power-receiving core 2 around which a power-receiving coil 1 is wound, a secondary battery 4 capable of being charged and discharged, a power-receiving circuit section 3, and a system circuit section 5, and is housed in a second outer case 6. The power-receiving core 2 is surrounded by the power-feeding cut core 8, and the power-receiving core 2 and the power-feeding cut core 8 are electromagnetically coupled to each other with the second outer case 6 interposed therebetween.

Description

本発明は、電磁誘導現象を利用して電力を供給する、携帯機器と充電器に関するものである。   The present invention relates to a portable device and a charger that supply power using an electromagnetic induction phenomenon.

従来、二次電池を搭載した機械と携帯可能な充電器とを組み合わせた携帯機器が知られている。
例えば、特許文献１に開示されるような携帯ケース付きの補聴器は、充電器及び補聴器本体から構成される。充電器は携帯に便利な箱体として用いられる。この箱体は、内部に電池及び収納槽が設けられており、収納槽に補聴器本体が収納されると共に電池からの充電が行われる。さらに詳述すると、収納槽上部両側に支持片が設けられ、収納槽底部の周縁部に充電接触端子が設置されており、補聴器本体の底部を収納槽内に、上部を支持片内にそれぞれ挿入すると、補聴器本体の接続端子が充電接触端子に円滑に接触し、微量の電圧値で迅速に充電が行われる。 2. Description of the Related Art Conventionally, portable devices in which a machine equipped with a secondary battery and a portable charger are combined are known.
For example, a hearing aid with a carrying case as disclosed in Patent Document 1 includes a charger and a hearing aid body. The charger is used as a box that is convenient to carry. The box is provided with a battery and a storage tank. The hearing aid main body is stored in the storage tank and the battery is charged. More specifically, support pieces are provided on both sides of the upper part of the storage tank, and charging contact terminals are installed on the peripheral part of the bottom part of the storage tank. Then, the connection terminal of the hearing aid main body smoothly contacts the charging contact terminal, and charging is performed quickly with a very small voltage value.

また、近年、民生用、医療用などの用途において、給電用の金属端子部などが、露出していない、非接触給電装置が利用されている。例えば、特許文献２に開示されるように、充電器としてクレードルを使用し、クレードルから伝送された送電電力を、携帯電話で受電する構成が挙げられる。特徴として、電磁誘導により、電力が発生する渦巻き状平面コイルを二次側伝送コイルとして携帯電話内に実装し、同様に渦巻き状平面コイルを、一次側伝送コイルとしてクレードル備えて、携帯電話端末の内蔵二次電池を充電する機能を備えている。非接触給電は、電磁誘導を利用するので、クレードルの送電側平面コイルから磁界を発生させ、携帯電話の受電側平面コイルと、共振させることにより電力が発生する。この場合、平面コイル同士が離れれば離れるほど充電効率が低下する。特許文献２では、クレードルと携帯電話のそれぞれのケースの最も外側近くに平面コイルを配置して、平面コイル同士の距離を出来るだけ近づけている。また、平面コイルの中心からのズレも調整出来る工夫をして、高い充電効率の実現と、非接触給電である利便性が損なわれない工夫をしている。   In recent years, non-contact power feeding devices in which a metal terminal for power feeding or the like is not exposed are used in consumer and medical applications. For example, as disclosed in Patent Document 2, there is a configuration in which a cradle is used as a charger and power transmitted from the cradle is received by a mobile phone. As a feature, a spiral planar coil that generates power by electromagnetic induction is mounted in a mobile phone as a secondary transmission coil, and similarly, a spiral planar coil is provided as a cradle as a primary transmission coil in a mobile phone terminal. It has a function to charge the built-in secondary battery. Since the non-contact power supply uses electromagnetic induction, electric power is generated by generating a magnetic field from the power transmission side planar coil of the cradle and resonating with the power reception side planar coil of the mobile phone. In this case, the charging efficiency decreases as the planar coils are separated from each other. In Patent Document 2, planar coils are arranged near the outermost sides of the respective cases of the cradle and the mobile phone, and the distance between the planar coils is made as close as possible. Moreover, the device which can also adjust the deviation from the center of the planar coil is devised so as to realize high charging efficiency and the convenience of non-contact power supply.

特開２００６−１１５４３８号公報JP 2006-115438 A 特開２００８−２０６２９５号公報JP 2008-206295 A

特許文献１に記載の技術を用いた携帯機器と充電器は、以下のような欠点を有している。携帯機器は、人が身に付けて日常生活で使用するため、充電接触端子部に油脂を含むごみの付着などによる接触不良の発生や、人が身に付けて使用するとき、むき出しとなる充電接触端子のショートなどの不具合を発生させる恐れがある。むき出しとなる充電接触端子を絶縁性の構造物で覆うようなメカニズムを導入する解決策も考えられるが、コストアップなどの新たな課題もあるので、コンシューマー製品への適用は進んでいない。   The portable device and the charger using the technique described in Patent Document 1 have the following drawbacks. Because mobile devices are worn by people and used in daily life, charging failure may occur due to adhesion of dust containing oil and grease to the charging contact terminals, and charging that is exposed when worn by people There is a risk of causing problems such as shorting of contact terminals. A solution that introduces a mechanism that covers the exposed charging contact terminal with an insulating structure is also conceivable. However, since there are new problems such as cost increase, application to consumer products has not progressed.

一方、特許文献２の技術を、特許文献１の携帯機器と充電器に適用すると、以下の課題がある。特許文献１の補聴器は特許文献２の携帯電話に比較すると、より小型であるため、渦巻き状平面コイルの直径も小さくする必要がある。直径を小さくした平面コイルは、効率低下するとともに、平面コイル同士の距離に対する効率低下のトレランスもより厳しくなる。特許文献１の補聴器の場合、充電器も携帯性を必要としており電源は、電池を使用している。平面コイルの小型化により充電効率が低下すると、電池による充電回数の低下をもたらすので、効率の低下は望ましくない。   On the other hand, when the technique of Patent Document 2 is applied to the portable device and the charger of Patent Document 1, there are the following problems. Since the hearing aid of Patent Document 1 is smaller than the mobile phone of Patent Document 2, it is necessary to reduce the diameter of the spiral planar coil. A planar coil having a reduced diameter has a reduced efficiency and a more severe tolerance for reduced efficiency with respect to the distance between the planar coils. In the case of the hearing aid of Patent Document 1, the charger also needs to be portable, and the power source uses a battery. If the charging efficiency is lowered due to the downsizing of the planar coil, the number of times of charging by the battery is reduced.

更に、補聴器のケースデザインは、耳に密着させて使用するため、曲面を用いてデザインされることが多い。このために、補聴器の最もケースの内側近くに配置しようとすると、更に平面コイルの直径も小さくする必要が生じて、効率の低下を更に招く結果となる。   Furthermore, since the case design of a hearing aid is used in close contact with the ear, it is often designed with a curved surface. For this reason, if the hearing aid is arranged closest to the inside of the case, it is necessary to further reduce the diameter of the planar coil, resulting in a further reduction in efficiency.

また、平面コイルの中心からのズレを許容するために、補聴器の平面コイルよりも、充電器の平面コイルを大きくするのが、一般的である。そのため、補聴器のケース内にある、平面コイルの背後にある電子部品、近接する電子部品にも、充電器のサイズの大きい平面コイルから、磁場が照射され、渦電流の作用で電子部品が発熱する。この発熱を回避するためには、透磁率の良い磁性シートを使用した、シールド対策が必要となり、コストの上昇や、構成の大型化が避けられない。   In order to allow a deviation from the center of the planar coil, it is common to make the planar coil of the charger larger than the planar coil of the hearing aid. For this reason, the electronic component behind the planar coil in the hearing aid case and the adjacent electronic component are also irradiated with a magnetic field from the large planar coil of the charger, and the electronic component generates heat by the action of the eddy current. . In order to avoid this heat generation, it is necessary to take a shielding measure using a magnetic sheet having a good magnetic permeability, and an increase in cost and an increase in the size of the configuration cannot be avoided.

特許文献１の例は、補聴器であるが、他にも小型の携帯機器は、体にフィットするデザインを採用する場合が多く、例えば時計、ヘッドセット、ステレオヘッドホン、携帯型健康機器、スマートホン接続機器等でも同様の課題を有する。   The example of Patent Document 1 is a hearing aid, but other small portable devices often adopt a design that fits the body. For example, a watch, a headset, stereo headphones, a portable health device, a smart phone connection Equipment and the like have similar problems.

本発明は、上記課題に鑑みてなされたものであり、小型の携帯機器を、携帯性のある充電器により、携帯機器のデザイン形状に左右されることなく、何時でも何処でも効率よく充電可能な携帯機器と充電器からなるワイヤレス充電装置を提供することを目的とする。   The present invention has been made in view of the above problems, and a small portable device can be efficiently charged anytime and anywhere by a portable charger regardless of the design shape of the portable device. It aims at providing the wireless charging device which consists of a portable device and a charger.

上記の課題を解決するために、本発明は以下の構成を有する。
第１の発明は、少なくとも、充電器と携帯機器とからなるワイヤレス充電装置において、充電器は、給電コイルが巻装された給電カットコアと、送信回路部と、給電可能な電源とを有し、第一の外装ケースに収納され、携帯機器は、受電コイルが巻装された受電コアと、充放電可能な二次電池と、受電回路部と、システム回路部とを有し、第二の外装ケースに収納され、受電コアは給電カットコアに囲まれており、受電コアと給電カットコアは第二の外装ケースを挟んで互いに電磁結合し、給電コイルに誘起された交流磁界は給電カットコアから円筒カットコアにわたって形成され、受電コイルに交流電流が誘起されることにより、充電器の電源から電力を給電コイルから受電コイルへ搬送される電力で携帯機器の電池を充電することを特徴とする。
この特徴によれば、受電コアと給電カットコアにより第二の外装ケースを挟んで互いに電磁結合し、磁束がコア内部に集中することで、給電コイルから受電コイルへ効率よく電力を搬送できる。また、同時に平面コイルでは不可能だった、小型で曲面を用いてデザインされた、携帯機器のケースでも高い電力の伝送効率を維持する。高い効率ゆえに、小型の電池を電源として用いても、充電器内に収納し、充電可能となる。よって、充電器は軽量化し、形態性を大きく改善できる。 In order to solve the above problems, the present invention has the following configuration.
1st invention is the wireless charging device which consists of a charger and a portable apparatus at least, The charger has the electric power cut core by which the electric power feeding coil was wound, the transmission circuit part, and the power supply which can be fed. The mobile device is housed in the first exterior case, and has a power receiving core around which a power receiving coil is wound, a rechargeable secondary battery, a power receiving circuit portion, and a system circuit portion, Housed in an outer case, the power receiving core is surrounded by the power supply cut core, the power reception core and the power supply cut core are electromagnetically coupled to each other across the second outer case, and the AC magnetic field induced in the power supply coil is the power supply cut core It is formed over the cylindrical cut core, and AC current is induced in the power receiving coil, so that the battery of the portable device is charged with the power conveyed from the power source of the charger to the power receiving coil. To.
According to this feature, the power receiving core and the power feeding cut core sandwich the second outer case and are electromagnetically coupled to each other, and the magnetic flux concentrates inside the core, so that power can be efficiently conveyed from the power feeding coil to the power receiving coil. At the same time, high power transmission efficiency is maintained even in the case of portable devices that are small and designed with curved surfaces, which was impossible with a planar coil. Because of high efficiency, even if a small battery is used as a power source, it can be stored in a charger and charged. Therefore, the charger can be reduced in weight and the formability can be greatly improved.

第２の発明は、携帯機器は充電器の第一の外装ケース内に収納され、第一の外装ケースの内壁に配設された収納部に第二の外装ケースが圧接され、受電コアと給電カットコアの磁気結合部が位置合わせされることを特徴とする。
この特徴によれば、第一の外装ケースを介することがなく、受電コアと給電カットコアの間に介するものは第二の外装ケース１枚だけとなる。このように、受電コアと給電カットコアとの間の距離が短くなるため、電磁結合がより強固になり、電力の伝送効率が向上する。また、磁束がコア内部に集中することで、携帯機器内部に磁性シートによる、シールドの必要性がなくなり、コストの上昇や構成の大型化が避けられる。さらに、携帯機器は充電器の第一の外装ケース内に収納され、第一の外装ケースの内壁に配設された収納部に第二の外装ケースが、圧接されるため、充電中の振動や衝撃により磁気結合部の位置ずれが無い。そのため、充電器と携帯機器とを携帯しながら、安定的に充電することが可能である。 In the second invention, the portable device is housed in the first exterior case of the charger, the second exterior case is press-contacted to the housing portion disposed on the inner wall of the first exterior case, the power receiving core and the power supply The magnetic coupling part of the cut core is aligned.
According to this feature, the first outer case is not interposed, and only one second outer case is interposed between the power receiving core and the power feeding cut core. As described above, since the distance between the power receiving core and the power feeding cut core is shortened, the electromagnetic coupling is further strengthened, and the power transmission efficiency is improved. Further, since the magnetic flux is concentrated inside the core, there is no need for a shield by a magnetic sheet inside the portable device, and an increase in cost and an increase in configuration can be avoided. Furthermore, since the portable device is housed in the first outer case of the charger and the second outer case is pressed against the housing portion disposed on the inner wall of the first outer case, vibrations during charging and There is no displacement of the magnetic coupling part due to the impact. Therefore, it is possible to stably charge while carrying the charger and the portable device.

第３の発明は、充電器の電源は電池であることを特徴とする。
この特徴によれば、何時でも何処でも効率よく充電することが可能である。 A third invention is characterized in that the power source of the charger is a battery.
According to this feature, it is possible to charge efficiently anytime and anywhere.

第４の発明は、受電コアと給電カットコアは、軟磁性材料が分散された樹脂からなる軟磁性体により構成され、弾性変形可能なことを特徴とする。
この特徴によれば、第二の外装ケースの凹部に勘合する際の挿入位置トレランスを、コアの弾性変形により改善し、容易に挿入出来る。 According to a fourth aspect of the present invention, the power receiving core and the power feeding cut core are made of a soft magnetic material made of a resin in which a soft magnetic material is dispersed, and are elastically deformable.
According to this feature, the insertion position tolerance at the time of fitting into the recess of the second exterior case is improved by the elastic deformation of the core, and can be easily inserted.

本発明のワイヤレス充電装置は、携帯機器のデザイン形状に左右されることなく、小型の携帯機器を、携帯性のある充電器により、何時でも何処でも効率よく充電可能とする。   The wireless charging device of the present invention enables a small portable device to be efficiently charged anytime and anywhere by a portable charger, regardless of the design shape of the portable device.

本発明に係る携帯機器と充電器の基本構成を示す模式的図である。It is a schematic diagram which shows the basic composition of the portable apparatus and charger which concern on this invention. 本発明に係る携帯型集音器の構成を示す模式的図である。It is a schematic diagram which shows the structure of the portable sound collector which concerns on this invention.

（実施例１）
図１は、本発明に係るワイヤレス充電装置の基本構成を示す模式図である。本発明のワイヤレス充電装置は、携帯機器と充電器からなる。充電器１３は、給電コイル９が巻装された給電カットコア８、送信回路部１０、電源１２を有し、第一の外装ケース１１に収納される。また、携帯機器７は、受電コイル１が巻装された受電コア２、受電回路部３、二次電池４、システム回路５を有し、第二の外装ケース６に収納される。さらに、給電コイルに誘起された交流磁界は給電カットコアから円筒カットコアにわたって形成され、受電コイルに交流電流が誘起される。これにより、充電器の電源から電力を給電コイルから受電コイルへ搬送される電力で携帯機器の電池を充電する。また、携帯機器７と充電器１３は非接触で電力の送受電を行うように構成されている。すなわち、携帯機器７の受電コア２と充電器１３の給電カットコア８が図中に示す一点鎖線を中心に各コアの端面から電磁結合するように配置されている。透磁率の高い材料からなる、受電コア２と給電カットコア８の各端面の間には磁性の影響を受けない金属や樹脂を使用した第二の外装ケース６がある。各コアの端面の間にある第二の外装ケース６の厚みを、薄くして各コア端面間の間隔を短くすることで、より効率の良い電磁結合を得ることができるため好ましい。各コアの端面間の間隔は２ｍｍから０．１ｍｍとすることが好ましい。２ｍｍ以上だと電磁結合効率が低下し０．１ｍｍ以下だと外装ケース６の構造強度に問題が発生する。一方、各コア端面間の間隔が広い場合、効率の良い電磁結合を得るためには、各コア断面積を大きくする必要が生じる。本発明では、携帯機器７は充電器１３の第一の外装ケース１１内に収納される構造により、各コアの端面の間にある第二の外装ケース６のみで、第一の外装ケースを介する必要がなく、小口径のコアを使用しても高い電磁結合が得られる。 Example 1
FIG. 1 is a schematic diagram showing a basic configuration of a wireless charging apparatus according to the present invention. The wireless charging device of the present invention includes a portable device and a charger. The charger 13 includes a power supply cut core 8 around which a power supply coil 9 is wound, a transmission circuit unit 10, and a power supply 12, and is accommodated in a first exterior case 11. The portable device 7 includes a power receiving core 2 around which the power receiving coil 1 is wound, a power receiving circuit unit 3, a secondary battery 4, and a system circuit 5, and is housed in a second outer case 6. Further, the AC magnetic field induced in the power supply coil is formed from the power supply cut core to the cylindrical cut core, and an AC current is induced in the power reception coil. Thereby, the battery of a portable apparatus is charged with the electric power conveyed from the power supply of a charger to a receiving coil from a feeding coil. Moreover, the portable device 7 and the charger 13 are configured to transmit and receive power in a contactless manner. That is, the power receiving core 2 of the portable device 7 and the power feeding cut core 8 of the charger 13 are arranged so as to be electromagnetically coupled from the end surfaces of the respective cores around the one-dot chain line shown in the drawing. Between the end faces of the power receiving core 2 and the power feeding cut core 8 made of a material having high magnetic permeability, there is a second outer case 6 using a metal or resin that is not affected by magnetism. It is preferable that the thickness of the second outer case 6 between the end surfaces of each core is reduced to shorten the interval between the core end surfaces, so that more efficient electromagnetic coupling can be obtained. The interval between the end faces of each core is preferably 2 mm to 0.1 mm. If it is 2 mm or more, the electromagnetic coupling efficiency is lowered, and if it is 0.1 mm or less, a problem occurs in the structural strength of the outer case 6. On the other hand, when the interval between the core end faces is wide, it is necessary to increase the cross-sectional area of each core in order to obtain efficient electromagnetic coupling. In the present invention, the portable device 7 is housed in the first outer case 11 of the charger 13, and only the second outer case 6 between the end surfaces of the cores is interposed via the first outer case. There is no need, and high electromagnetic coupling can be obtained even when a small-diameter core is used.

さらに、従来の平面コイルでは、平面コイル全面を第二の外装ケース６の内側に密着する必要があったが、本発明では受電コア２の端面部分のみピンポイントで密着すればよく、第二の外装ケース６は曲面を用いたデザインを使用しても効率低下を発生させない。しかも、図中に記載のように、第二の外装ケース６で、局部的に凹部を設け肉厚を薄くし、受電コア２の先端を圧入する構造にすることで、第二の外装ケース６の構造強度を犠牲にすることなく、更に各コア端面間の間隔を狭めて効率を改善できる。   Furthermore, in the conventional planar coil, the entire planar coil had to be in close contact with the inside of the second exterior case 6, but in the present invention, only the end surface portion of the power receiving core 2 may be in close contact with the pinpoint. Even if the exterior case 6 uses a design using a curved surface, the efficiency does not decrease. In addition, as shown in the figure, the second outer case 6 has a structure in which a concave portion is locally provided to reduce the thickness and the tip of the power receiving core 2 is press-fitted. Without sacrificing the structural strength, efficiency can be improved by further narrowing the interval between the core end faces.

また、受電コア２は、軟磁性材料が分散された樹脂からなる軟磁性体により構成されることで、弾性変形可能な特性を付与することができる。樹脂にゴムを混在させると更に可撓性を増し、予め成型加工された第二の外装ケース６の凹部に、受電コイルを巻装済みの受電コア２を圧入する工法で、可撓性のあるコアは容易に圧入する事が可能となり、製造コストの削減に寄与する。   Further, the power receiving core 2 can be provided with an elastically deformable characteristic by being composed of a soft magnetic body made of a resin in which a soft magnetic material is dispersed. When rubber is mixed in the resin, the flexibility is further increased, and it is flexible by press-fitting the power receiving core 2 in which the power receiving coil is wound into the recess of the second outer case 6 that has been molded in advance. The core can be easily press-fitted, contributing to a reduction in manufacturing costs.

さらに、受電コア２は、高い透磁率の材料を使用しているので、磁束がコア内部に集中することで、従来の平面コイルを使用した場合と異なり、携帯機器内部に磁性シートによるシールドの必要性がなくなり、コストの上昇や構成の大型化が避けられる。受電コア２の透磁率は４０以上が好ましい。   Furthermore, since the power receiving core 2 uses a material having a high magnetic permeability, the magnetic flux concentrates inside the core, and unlike the case of using a conventional planar coil, a shield with a magnetic sheet is required inside the portable device. This avoids an increase in cost and size. The magnetic permeability of the power receiving core 2 is preferably 40 or more.

また、携帯機器７は充電器１３の第一の外装ケース１１内に収納され、充電器１３の第一の外装ケース１１の図示されていない内壁に配設された収納部に、第二の外装ケース６が圧接される構造となっている。詳細は第一の外装ケース１１には図示しないが、蓋が有り、充電器１３を収納後、蓋を閉める事により圧接される。これにより、受電コア２と給電カットコア８が図中に示す一点鎖線を中心に配置され、充電中の振動や衝撃により位置ずれが無く、携帯しながら安定な充電を可能とする。   In addition, the portable device 7 is accommodated in the first exterior case 11 of the charger 13, and the second exterior is disposed in the accommodating portion disposed on the inner wall (not shown) of the first exterior case 11 of the charger 13. The case 6 is structured to be pressed. Although the details are not shown in the first outer case 11, the details are provided with a lid, which is pressed by closing the lid after storing the charger 13. As a result, the power receiving core 2 and the power feeding cut core 8 are arranged around the alternate long and short dash line shown in the figure, and there is no displacement due to vibration or impact during charging, and stable charging is possible while being carried.

また、第一の外装ケース１１には、給電カットコア８が固定され、更に、給電カットコア８に巻装された給電コイル９に接続される送信回路部１０、更に電源１２に電気的に接続されている。給電カットコア８は、コスト低減可能な分割成型され組み立てられたものでも良い。更に、第一の外装ケース１１の製造工程でインサート成型され、よりコスト低減される製造方法を用いても良い。また、形状がカットコアであればよく、楕円型や丸型でも良い。   The first outer case 11 has a power supply cut core 8 fixed thereto, and is further electrically connected to a transmission circuit unit 10 connected to a power supply coil 9 wound around the power supply cut core 8 and further to a power source 12. Has been. The power feeding cut core 8 may be divided and assembled so that the cost can be reduced. Further, a manufacturing method in which insert molding is performed in the manufacturing process of the first outer case 11 and the cost is further reduced may be used. Moreover, the shape should just be a cut core, and an elliptical shape or a round shape may be sufficient.

また、電力の送受電を行う際には、受電コア２は給電カットコア８に囲まれるような構成になっている。このような構成にすることにより、携帯機器７を小型化することができ、さらにデザインを自由に設定することができる。例えば、平面コイルを用いた携帯機器では平面コイルを配するための平面部を設ける必要があった。このように、携帯機器のデザイン形状に制約があり、小型化が困難だった。また、従来のカットコアを用いた携帯機器においては、充電器側のカットコアと携帯機器側のカットコアが略対称的な形状になっていた。そのため、携帯機器内部におけるカットコアの領域を、充電器と同等に確保しなければならず、その結果、携帯機器の小型化は困難だった。本発明は、携帯機器７の受電コア２が充電器の給電カットコアよりも小さく、受電コアが給電カットコアに囲まれるような構成になっている。これにより、携帯機器のデザイン形状の制約なく、小型で曲面を用いてデザインされたものであっても、電力の高い伝送効率を維持しつつ充電することができる。高い伝送効率ゆえに、小型の電池を電源として用いても、充電器内に収納し、充電可能となる。よって、充電器は軽量化し、形態性を大きく改善できる。   In addition, when power is transmitted and received, the power receiving core 2 is configured to be surrounded by the power feeding cut core 8. By adopting such a configuration, the portable device 7 can be reduced in size and the design can be freely set. For example, in a portable device using a planar coil, it is necessary to provide a planar portion for arranging the planar coil. As described above, the design shape of the portable device is limited, and it is difficult to reduce the size. Moreover, in the portable device using the conventional cut core, the cut core on the charger side and the cut core on the portable device side have a substantially symmetrical shape. For this reason, the area of the cut core in the portable device has to be ensured as much as the charger, and as a result, it has been difficult to reduce the size of the portable device. In the present invention, the power receiving core 2 of the portable device 7 is smaller than the power supply cut core of the charger, and the power reception core is surrounded by the power supply cut core. Thereby, even if it is small and designed using a curved surface without restriction of the design shape of the portable device, it can be charged while maintaining high power transmission efficiency. Because of high transmission efficiency, even if a small battery is used as a power source, it can be stored in a charger and charged. Therefore, the charger can be reduced in weight and the formability can be greatly improved.

受電コアは、図１に示すように、角型のノンカットコアの直線部を切り出した形状である。このとき、切り出し後のノンカットコアはギャップコアのようにコアの一部にギャップを有する。給電カットコアは、ギャップコアのように、コアの一部にギャップを有する形状である。受電コアと給電カットコアは合わせることにより、略ひとつのコアの形状をなす。このコアの形状は角型であっても丸型であってもよい。なお、丸型の場合、受電コアは円弧の一部を構成する。   As shown in FIG. 1, the power receiving core has a shape in which a straight portion of a square non-cut core is cut out. At this time, the non-cut core after cutting has a gap in a part of the core like a gap core. The power supply cut core has a shape having a gap in a part of the core like a gap core. By combining the power receiving core and the power feeding cut core, a substantially single core shape is formed. The shape of the core may be square or round. In the case of a round shape, the power receiving core forms part of an arc.

電源１２は携帯性に優れた小型の電池を使用する。電池は、補聴器など電力容量の少ない携帯機器に使用する場合は小型の一次電池、ステレオヘッドセットなど電力容量の大きな製品の場合は高エネルギー密度のリチウムイオン二次電池を使用することが好ましい。携帯機器７を充電する際は、図示しないがスイッチ等により制御し、送信回路部１０に電源を供給する。送信回路部１０は発信回路を主に、共振周波数、または共振周波数近くで発信し、交流電流を給電コイル９に流す事で、給電カットコア８内部に交流磁場を発生させる。   The power source 12 uses a small battery with excellent portability. The battery is preferably a small primary battery when used in a portable device having a small power capacity such as a hearing aid, and a high energy density lithium ion secondary battery when the product has a large power capacity such as a stereo headset. When charging the portable device 7, although not shown, it is controlled by a switch or the like to supply power to the transmission circuit unit 10. The transmission circuit unit 10 transmits an oscillation circuit mainly at a resonance frequency or near the resonance frequency, and causes an alternating current to flow through the power supply coil 9 to generate an alternating magnetic field inside the power supply cut core 8.

給電カットコア８の交流磁場は、携帯機器７の受電コア２と上記の構造に起因して効率よく電磁結合し、受電コア２に巻装された受電コイル１に交流電流を発生させ、受電回路部３により整流、充電制御され、充電可能な二次電池４を充電する。   The AC magnetic field of the power supply cut core 8 is efficiently electromagnetically coupled to the power receiving core 2 of the portable device 7 due to the above structure, and an AC current is generated in the power receiving coil 1 wound around the power receiving core 2, thereby receiving power. The rectification and charge control is performed by the unit 3, and the rechargeable secondary battery 4 is charged.

第一の外装ケース１１内の電池を使用した電源１２の容量は、限られているので、効率の良い、非接触で電力の送受電できる本発明の構成により、電源１２の小型軽量化を可能として、更に、第一の外装ケース１１も小型化可能となり携帯性の優れた充電器１３となっている。   Since the capacity of the power source 12 using the battery in the first outer case 11 is limited, the power source 12 can be reduced in size and weight by the configuration of the present invention that can transmit and receive power efficiently without contact. In addition, the first outer case 11 can also be reduced in size, and the charger 13 has excellent portability.

また、システム回路部５は、例えば、携帯機器７が補聴器の場合は図示しないが、マイク、スピーカー、スイッチ類などを制御する回路である。他にも例えば時計、ヘッドセット、ステレオヘッドホン、携帯型健康機器、スマートホン接続機器等でもそれぞれに対応したシステム回路部５を用いれば良い。   In addition, the system circuit unit 5 is a circuit that controls a microphone, a speaker, switches, and the like, although not shown when the portable device 7 is a hearing aid, for example. In addition, for example, a system circuit unit 5 corresponding to a watch, a headset, stereo headphones, a portable health device, a smart phone connection device, or the like may be used.

また、給電コイルおよび受電コイルは絶縁層が設けられた単線又は縒り線の導線を給電カットコアおよび受電コアに直接巻回したものである。また、予め給電カットコアおよび受電コアの外形以上のボビンを用意し、単線又は縒り線の導線をボビンに巻回しホーミング後にボビンから外した空心コイルを給電カットコアおよび受電コアに取り付けても良い。   The power supply coil and the power reception coil are obtained by winding a single wire or a twisted wire having an insulating layer directly around a power supply cut core and a power reception core. Alternatively, a bobbin that is larger than the outer shape of the power supply cut core and the power reception core may be prepared in advance, and an air-core coil that is removed from the bobbin after homing by winding a single wire or a twisted wire may be attached to the power supply cut core and the power reception core.

また、受電回路部は、受電コイルにおいて電磁誘導によって生じる交流の電力を、整流して直流の電力に変換し、電圧を所定の電圧に調整した後、充電制御され、電池を充電する。ここで、整流には、例えばブリッジ整流回路など、交流の電力を直流に変換可能な構成であればどのような構成であってもよい。また、電圧調整は、電池に供給する電圧を調整可能な構成であれば、どのような構成であってもよい。   The power receiving circuit unit rectifies and converts AC power generated by electromagnetic induction in the power receiving coil into DC power, adjusts the voltage to a predetermined voltage, and then performs charge control to charge the battery. Here, the rectification may be any configuration as long as it can convert AC power to DC, such as a bridge rectifier circuit. The voltage adjustment may be any configuration as long as the voltage supplied to the battery can be adjusted.

また、第二の外装ケースは、局部的に凹部を設け肉厚を薄くし、受電コアの先端を圧入する構造にすることで、第二の外装ケースの構造強度を犠牲にすることなく、更に各コア端面間の間隔を狭めて効率を改善している。端面間の間隔は第二の外装ケースがプラスチックで構成されている場合は最薄で０．３ｍｍ程度、チタンやステンレスの場合は最薄で０．１ｍｍ程度にすることができる。
また、第一の外装ケースは、軽量なプラスチックを使用し、例えばポリカーボネート、ＡＢＳ樹脂などを、製品に合わせて使用することができる。 In addition, the second exterior case has a structure in which a concave portion is locally provided and the thickness is reduced and the tip of the power receiving core is press-fitted, without sacrificing the structural strength of the second exterior case. The efficiency is improved by narrowing the interval between the core end faces. The distance between the end faces can be as thin as about 0.3 mm when the second outer case is made of plastic, and as thin as about 0.1 mm when titanium or stainless steel is used.
In addition, the first outer case uses a light plastic, and for example, polycarbonate, ABS resin, or the like can be used according to the product.

図２は本発明に係る携帯型集音器の構成を示す模式的図である。図中、携帯機器７は携帯型集音器であり、インナー型のイヤホンで左右２個収納される。図番は片側のみ記載して説明する。   FIG. 2 is a schematic diagram showing the configuration of the portable sound collector according to the present invention. In the figure, the portable device 7 is a portable sound collector and is housed in the left and right two by inner-type earphones. The figure numbers are described only on one side.

この携帯機器７は充電器１３の第一の外装ケース１１内に、第一の外装ケース１１の内壁に配設された収納部１５に収まり、蓋１４を閉める事により圧接される構造となっている。スイッチ１９は、蓋１４に連動し、携帯機器７を収納し、蓋１４を閉める事により電源１２と送信回路部１０を接続し給電コイル９、給電カットコア８を介して携帯機器７を充電する。   The portable device 7 is accommodated in the first outer case 11 of the charger 13 in the storage portion 15 disposed on the inner wall of the first outer case 11 and is pressed by closing the lid 14. Yes. The switch 19 interlocks with the lid 14, houses the portable device 7, closes the lid 14, connects the power supply 12 and the transmission circuit unit 10, and charges the portable device 7 through the feeding coil 9 and the feeding cut core 8. .

携帯機器７の内部には図１の説明と同じように、受電コアに巻装され受電コイルに接続される、受電回路部、電池、システム回路部が内蔵されている。更に、図示していないが、磁気検出回路を内蔵し、収納部１５に設けられた磁石１６の磁気を検出し、受電回路部からの電圧を電池へ供給し、システム回路部は遮断する。これにより充電中にシステム回路部で消費する電力を削減できるので、電池を短時間で充電できるようになるとともに、電源１２に使用されている電池の消耗を減らすこともできる。   As in the description of FIG. 1, a power receiving circuit unit, a battery, and a system circuit unit that are wound around a power receiving core and connected to a power receiving coil are built in the portable device 7. Further, although not shown, a magnetism detection circuit is built in, the magnetism of the magnet 16 provided in the storage unit 15 is detected, the voltage from the power reception circuit unit is supplied to the battery, and the system circuit unit is shut off. As a result, the power consumed by the system circuit unit during charging can be reduced, so that the battery can be charged in a short time and the consumption of the battery used for the power source 12 can be reduced.

更に、携帯機器７の内部には、これも図示されないが、二次電池の充電電圧を監視する回路があり、規定の充電終了電圧を検出すると、発光ダイオードの点滅で、コード化された信号を第二の外装ケースを透過して放射される。この信号を検出する受光素子１７が、第一の外装ケース１１内に設置されている。この受光素子１７は充電終了電圧のコードを検出すると、送信回路部１０に働き、送信回路を停止する。この動作でも、電源１２に使用されている電池の消耗を減らすこともできる。   Further, although not shown in the figure, the portable device 7 has a circuit for monitoring the charging voltage of the secondary battery. When a specified charging end voltage is detected, the coded signal is displayed by blinking the light emitting diode. Radiated through the second outer case. A light receiving element 17 for detecting this signal is installed in the first outer case 11. When the light receiving element 17 detects the code of the charging end voltage, it acts on the transmission circuit unit 10 and stops the transmission circuit. This operation can also reduce the consumption of the battery used for the power supply 12.

更に、この受光素子１７は充電終了電圧のコードを検出すると、蓋１４に設置しているインジケーター１８により、ユーザーに充電の完了を知らせる。インジケーター１８は発光ダイオードの点滅または、発光色の変化で充電終了を表示する場合や、液晶表示素子により表示してもよい。   Further, when the light receiving element 17 detects the code of the charging end voltage, an indicator 18 provided on the lid 14 notifies the user of the completion of charging. The indicator 18 may be displayed when the end of charging is displayed by blinking of a light emitting diode or a change in emission color, or by a liquid crystal display element.

電源１２は、小型で高容量のリチウム二次電池を使用でき、図示はしないが、充電用のコネクタとしてＵＳＢ（ｕｎｉｖｅｒｓａｌ ｓｅｒｉａｌ ｂｕｓ）コネクタを第一の外装ケース１１に設置しても良い。   As the power source 12, a small and high capacity lithium secondary battery can be used. Although not shown, a USB (universal serial bus) connector may be installed in the first outer case 11 as a charging connector.

更に、小型軽量とローコスト化を必要な場合は、電源１２の小型で高容量のリチュウム二次電池を使用せず、充電用のコネクタにケーブルを接続して外部より供給されるエネルギーを利用しても良い。   Furthermore, when small size, light weight, and low cost are required, the power supply 12 is not used with a high-capacity lithium secondary battery, but a cable is connected to the charging connector and the energy supplied from the outside is used. Also good.

携帯機器７の受電コア２は、上記の構造に起因して効率よく電磁結合し、受電コア２に巻装された受電コイル１に交流電流を発生させ、受電回路部３により整流、充電制御され、充電可能な二次電池４を充電する。   The power receiving core 2 of the portable device 7 is efficiently electromagnetically coupled due to the above structure, generates an alternating current in the power receiving coil 1 wound around the power receiving core 2, and is rectified and charged by the power receiving circuit unit 3. The rechargeable secondary battery 4 is charged.

また、システム回路部５は、例えば、携帯機器７が多機能時計の場合は、図示しないが、無線通信、振動モーター、スピーカー、スイッチ類などを制御する回路である。他にも例えば時計、ヘッドセット、ステレオヘッドホン、携帯型健康機器、スマートホン接続機器等でもそれぞれに対応したシステム回路部５を用いれば良い。   For example, when the portable device 7 is a multi-function watch, the system circuit unit 5 is a circuit that controls wireless communication, a vibration motor, a speaker, switches, and the like (not shown). In addition, for example, a system circuit unit 5 corresponding to a watch, a headset, stereo headphones, a portable health device, a smart phone connection device, or the like may be used.

１ 受電コイル
２ 受電コア
３ 受電回路部
４ 二次電池
５ システム回路
６ 第二の外装ケース
７ 携帯機器
８ 給電カットコア
９ 給電コイル
１０ 送信回路部
１１ 第一の外装ケース
１２ 電源
１３ 充電器
１４ 蓋
１５ 収納部
１６ 磁石
１７ 受光素子
１８ インジケーター
１９ スイッチ DESCRIPTION OF SYMBOLS 1 Power receiving coil 2 Power receiving core 3 Power receiving circuit part 4 Secondary battery 5 System circuit 6 2nd exterior case 7 Mobile device 8 Feed cut core 9 Feed coil 10 Transmit circuit part 11 First exterior case 12 Power supply 13 Charger 14 Cover 15 Storage part 16 Magnet 17 Light receiving element 18 Indicator 19 Switch

Claims (4)

充電器と携帯機器とからなるワイヤレス充電装置において、
前記充電器は、給電コイルが巻装された給電カットコアと、送信回路部と、給電可能な電源とを有し、第一の外装ケースに収納され、
前記携帯機器は、受電コイルが巻装された受電コアと、充放電可能な二次電池と、受電回路部と、システム回路部とを有し、第二の外装ケースに収納され、
前記受電コアは前記給電カットコアに囲まれており、
前記受電コアと前記給電カットコアは前記第二の外装ケースを挟んで互いに電磁結合し、
前記給電コイルに誘起された交流磁界は給電カットコアから円筒カットコアにわたって形成され、受電コイルに交流電流が誘起されることにより、前記充電器の前記電源から電力を給電コイルから受電コイルへ搬送される電力で前記携帯機器の前記電池を充電することを特徴とするワイヤレス充電装置。 In a wireless charging device consisting of a charger and a portable device,
The charger has a power supply cut core around which a power supply coil is wound, a transmission circuit unit, and a power supply capable of supplying power, and is housed in a first exterior case.
The portable device has a power receiving core around which a power receiving coil is wound, a chargeable / dischargeable secondary battery, a power receiving circuit portion, and a system circuit portion, and is housed in a second outer case,
The power receiving core is surrounded by the power feeding cut core,
The power receiving core and the power feeding cut core are electromagnetically coupled to each other across the second outer case,
The AC magnetic field induced in the power supply coil is formed from the power supply cut core to the cylindrical cut core, and when AC current is induced in the power reception coil, power is transferred from the power source of the charger to the power reception coil from the power supply coil. A wireless charging device for charging the battery of the portable device with electric power. 前記携帯機器は前記充電器の第一の外装ケース内に収納され、第一の外装ケースの内壁に配設された収納部に前記第二の外装ケースが圧接され、前記受電コアと給電カットコアの磁気結合部が位置合わせされることを特徴とする請求項１に記載のワイヤレス充電装置。   The portable device is housed in a first exterior case of the charger, the second exterior case is press-contacted to a housing portion disposed on an inner wall of the first exterior case, and the power receiving core and the power feeding cut core The wireless charging device according to claim 1, wherein the magnetic coupling portions are aligned. 前記充電器の前記電源は電池であることを特徴とする請求項１または２に記載のワイヤレス充電装置。   The wireless charging apparatus according to claim 1, wherein the power source of the charger is a battery. 前記受電コアと前記給電カットコアは、軟磁性材料が分散された樹脂からなる軟磁性体により構成され、弾性変形可能なことを特徴とする請求項１から３のいずれか一項に記載のワイヤレス充電装置。   4. The wireless device according to claim 1, wherein the power receiving core and the power feeding cut core are made of a soft magnetic material made of a resin in which a soft magnetic material is dispersed and are elastically deformable. 5. Charging device.
JP2013124722A 2013-06-13 2013-06-13 Wireless charging device Withdrawn JP2015002580A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109314287A (en) * 2016-11-01 2019-02-05 Tdk株式会社 Portable electronic device and wireless power transmission device
EP3993447A1 (en) * 2020-10-23 2022-05-04 Sivantos Pte. Ltd. Charging system and charging device for a hearing aid

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109314287A (en) * 2016-11-01 2019-02-05 Tdk株式会社 Portable electronic device and wireless power transmission device
US11374427B2 (en) 2016-11-01 2022-06-28 Tdk Corporation Portable electronic device and wireless electric power transmission device
EP3993447A1 (en) * 2020-10-23 2022-05-04 Sivantos Pte. Ltd. Charging system and charging device for a hearing aid

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