JP5452394B2 - Fixture with contactless power supply function - Google Patents

Fixture with contactless power supply function Download PDF

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JP5452394B2
JP5452394B2 JP2010153372A JP2010153372A JP5452394B2 JP 5452394 B2 JP5452394 B2 JP 5452394B2 JP 2010153372 A JP2010153372 A JP 2010153372A JP 2010153372 A JP2010153372 A JP 2010153372A JP 5452394 B2 JP5452394 B2 JP 5452394B2
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fixture
power
power feeding
top plate
floor
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JP2012016250A (en
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靖史 佐藤
隆 荒賀
友康 平野
弘樹 塩田
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Panasonic Corp
Panasonic Holdings Corp
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Panasonic Corp
Matsushita Electric Industrial Co Ltd
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本発明は、非接触給電機能付き什器に関し、詳しくは非接触給電ユニットから発生する電磁波の外部への漏洩を遮断する機能を備えた什器に関するものである。   The present invention relates to a fixture with a non-contact power supply function, and more particularly to a fixture having a function of blocking leakage of electromagnetic waves generated from a non-contact power supply unit to the outside.

近年、負荷機器に給電を行う給電システムとして、有線で給電を行うのではなくて、給電装置から負荷機器側に設けられる受電装置へ非接触で給電を行う非接触給電システムが知られている。   2. Description of the Related Art In recent years, as a power feeding system that feeds power to a load device, a non-contact power feeding system that performs power feeding in a non-contact manner from a power feeding device to a power receiving device provided on the load device side is known.

その一例として、例えば特許文献1には、負荷機器に内蔵する給電装置に一次コイルとこれに接続される第1の磁性体とを設け、受電装置に二次コイルとこれに接続される第2の磁性体とを設けた非接触給電システムが開示されている。この一次コイルと二次コイルは第1の磁性体と第2の磁性体との引力によって所定の位置に誘導され、一次コイルから二次コイルへ非接触給電を行う。そして、給電装置及び受電装置のうち少なくともどちらか一方に磁気シールドを設けることにより、電磁波が負荷機器に影響を及ぼさないようにしている。   As an example, for example, in Patent Document 1, a power supply device built in a load device is provided with a primary coil and a first magnetic body connected thereto, and a power receiving device is connected to a secondary coil and a second coil. A non-contact power feeding system provided with a magnetic material is disclosed. The primary coil and the secondary coil are guided to a predetermined position by the attractive force between the first magnetic body and the second magnetic body, and perform non-contact power feeding from the primary coil to the secondary coil. Then, by providing a magnetic shield in at least one of the power feeding device and the power receiving device, the electromagnetic wave does not affect the load device.

特開2009−95072号公報JP 2009-95072 A

ところが上記特許文献1に示された従来例では、負荷機器に対しては磁気シールドが行われているが、磁気シールドされていない受電装置の側面方向からは電磁波が外部に漏洩しやすくなり、このため側面方向に配置した他の負荷機器に影響を及ぼすという問題があった。   However, in the conventional example shown in Patent Document 1 described above, although the magnetic shield is applied to the load device, electromagnetic waves are likely to leak to the outside from the side surface direction of the power receiving device that is not magnetically shielded. For this reason, there is a problem of affecting other load devices arranged in the lateral direction.

本発明は上記の事情に鑑みてなされたものであって、その目的とするところは、什器本体或いは室内に設置した負荷機器に対して、給電装置及び受電装置から発生する電磁波の影響を及ぼさないようにできる非接触給電機能付き什器を提供することにある。   The present invention has been made in view of the above circumstances, and the object of the present invention is not to have an influence of electromagnetic waves generated from the power feeding device and the power receiving device on the fixture body or the load equipment installed in the room. An object of the present invention is to provide a fixture with a non-contact power feeding function.

前記の課題を解決するために、本発明の非接触給電機能付き什器は、給電装置が埋設されている床に什器本体を設置し、この什器本体に、天板部とこの天板部の外周側から床面に向けて延出された側壁部とを設け、前記天板部の上方に負荷機器を配置し、前記天板部と前記側壁部とで囲まれた空間部に、床内部の前記給電装置から非接触で電力を受けて前記負荷機器へ供給する受電装置を収納すると共に、この空間部の床対向側以外のすべての面をシールド部材で覆ったことを特徴とする。   In order to solve the above-mentioned problems, the fixture with a non-contact power feeding function of the present invention has a fixture main body installed on the floor where the power feeding device is embedded, and the fixture main body has a top plate portion and an outer periphery of the top plate portion. A side wall portion extending from the side toward the floor surface, placing a load device above the top plate portion, and in a space surrounded by the top plate portion and the side wall portion, The power receiving device that receives power from the power feeding device in a non-contact manner and supplies the power to the load device is housed, and all surfaces other than the floor facing side of the space portion are covered with a shield member.

前記天板部の上面から上方に向けて垂直な仕切壁を立設し、この仕切壁の一方の面に前記負荷機器を設置固定することが好ましい。   It is preferable that a vertical partition wall is erected upward from the upper surface of the top plate portion, and the load device is installed and fixed on one surface of the partition wall.

前記仕切壁の一方の面とは反対側の他方の面に、机機能と収納機能のいずれか一方の機能を持たせることが好ましい。   It is preferable that the other surface opposite to one surface of the partition wall has a function of either a desk function or a storage function.

本発明の非接触給電機能付き什器は、什器本体或いは室内に設置した負荷機器に対して、給電装置及び受電装置から発生する電磁波の影響を及ぼさないようにできるものである。   The fixture with a non-contact power feeding function of the present invention can prevent the influence of electromagnetic waves generated from the power feeding device and the power receiving device on the fixture body or the load equipment installed in the room.

本発明の非接触給電機能付き什器の実施形態の一例を説明する正面断面図である。It is front sectional drawing explaining an example of embodiment of the fixture with a non-contact electric power feeding function of this invention. 同上の側面断面図である。It is side surface sectional drawing same as the above. 同上の床内部に、給電コイルと高周波インバータとを埋設した実施形態の正面断面図である。It is front sectional drawing of embodiment which embed | buried the feeding coil and the high frequency inverter in the inside of a floor same as the above. 他の実施形態であり、什器本体の仕切壁の背面側に机機能を持たせた一例を説明する側面断面図である。It is other embodiment and it is side sectional drawing explaining an example which gave the desk function to the back side of the partition wall of the fixture main body. 更に他の実施形態であり、什器本体の仕切壁の背面側に収納機能を持たせた一例を説明する側面断面図である。It is side surface sectional drawing explaining an example which is another embodiment and gave the storage function to the back side of the partition wall of the fixture main body.

以下、本発明の実施の形態について、図面を参照しながら説明する。   Hereinafter, embodiments of the present invention will be described with reference to the drawings.

図1は、本実施形態の非接触給電機能付き什器を正面から見た図であり、図2は側面から見た図である。以下の例では、建物として、戸建て住宅或いは集合住宅を想定するが、住宅に限らず、オフィスや店舗などの建屋でもよい。   FIG. 1 is a view of a fixture with a non-contact power feeding function of the present embodiment as viewed from the front, and FIG. 2 is a view as viewed from the side. In the following example, a detached house or an apartment house is assumed as a building, but the building is not limited to a house but may be a building such as an office or a store.

フローリング用の床Fを構成する床材8の内部には、給電装置5が埋設されている。なお給電装置5は床材8の下面側に配設されてもよい。給電装置5は、商用電源からの電気エネルギーを磁気エネルギーに変換して高周波磁界を発生する給電コイル5aと、交流電流の周波数を制御する高周波インバータ20(図3)とを備えている。なお床材8として、単位寸法に形成されたものが用いられるが、単位寸法に形成することは必須ではない。またコルクタイル、プラスチックタイルなどを床材8として用いることもできる。   A power feeding device 5 is embedded in the floor material 8 constituting the floor F for flooring. The power feeding device 5 may be disposed on the lower surface side of the flooring 8. The power supply device 5 includes a power supply coil 5a that converts electric energy from a commercial power source into magnetic energy to generate a high-frequency magnetic field, and a high-frequency inverter 20 (FIG. 3) that controls the frequency of the alternating current. In addition, although the thing formed in the unit dimension is used as the flooring 8, forming in a unit dimension is not essential. Cork tiles, plastic tiles, and the like can also be used as the flooring 8.

什器2は、間仕切り壁の機能を有する什器本体3を備える。什器本体3にはキャスター18が取り付けられており、床F上を移動走行可能としている。なお、キャスター18にロック機構(図示せず)を設けて、什器本体3をその場で動かないように固定するのが望ましい。   The fixture 2 includes a fixture main body 3 having the function of a partition wall. A caster 18 is attached to the fixture body 3 so that it can travel on the floor F. In addition, it is desirable to provide the caster 18 with a lock mechanism (not shown) and fix the fixture body 3 so as not to move on the spot.

上記什器本体3には、天板部9と、天板部9の四辺側から床面7近傍まで延出された側壁部12と、側壁部12の下面側を覆う底板部23とが設けられている。これら天板部9と側壁部12と底板部23とで囲まれた空間部10に、受電装置6が収納されている。   The fixture body 3 is provided with a top plate portion 9, a side wall portion 12 extending from the four sides of the top plate portion 9 to the vicinity of the floor surface 7, and a bottom plate portion 23 covering the lower surface side of the side wall portion 12. ing. The power receiving device 6 is housed in the space 10 surrounded by the top plate 9, the side wall 12, and the bottom plate 23.

本例の受電装置6は、受電コイル6aと、整流平滑回路21と、正弦波出力インバータ22とを備えている。受電コイル6aは、上記給電コイル5aの磁界の変化から電圧を発生させる。整流平滑回路21は、受電コイル6aで受電された電力を直流電力に変換して出力する。正弦波出力インバータ22は、整流平滑回路21から出力される直流電力(例えば24V)を負荷電力(250W以上、AC100V、50/60Hz)に変換する。これら給電コイル5aと受電コイル6aの間隔G(図1)は例えば45mmとされる。また図3に示す給電コイル5aの外径寸法Mは例えば345mm、受電コイル6aの外径寸法Nは例えば245mmとされる。   The power receiving device 6 of this example includes a power receiving coil 6 a, a rectifying and smoothing circuit 21, and a sine wave output inverter 22. The power receiving coil 6a generates a voltage from the change in the magnetic field of the power feeding coil 5a. The rectifying and smoothing circuit 21 converts the power received by the power receiving coil 6a into DC power and outputs it. The sine wave output inverter 22 converts DC power (for example, 24V) output from the rectifying / smoothing circuit 21 into load power (250 W or more, AC100V, 50/60 Hz). A gap G (FIG. 1) between the feeding coil 5a and the receiving coil 6a is, for example, 45 mm. Further, the outer diameter dimension M of the power feeding coil 5a shown in FIG. 3 is 345 mm, for example, and the outer diameter dimension N of the power receiving coil 6a is 245 mm, for example.

上記給電装置5と受電装置6とで非接触給電ユニット4が構成される。つまり、給電コイル5aからの磁気エネルギーを電磁誘導の原理で受電コイル6aで電気エネルギーに変換して、負荷機器に電力を供給する非接触給電システムが構成される。   The power feeding device 5 and the power receiving device 6 constitute a non-contact power feeding unit 4. That is, a non-contact power feeding system is configured that converts magnetic energy from the power feeding coil 5a into electric energy by the power receiving coil 6a based on the principle of electromagnetic induction and supplies power to the load device.

ここで、上記天板部9の内面全面に亘って非透磁性を有するシールド部材11aが被覆されており、さらに側壁部12の内面全面に亘って非透磁性を有するシールド部材11bが被覆されている。床対向側Aに位置する底板部23の内面には、シールド部材は被覆されていない。これにより、天板部9と側壁部12とで囲まれた空間部10は、給電コイル5aが埋設されている床対向側A以外のすべての面が磁気シールド空間となっている。   Here, the shield member 11a having non-magnetic permeability is coated over the entire inner surface of the top plate portion 9, and the shield member 11b having non-magnetic permeability is coated over the entire inner surface of the side wall portion 12. Yes. The inner surface of the bottom plate portion 23 located on the floor facing side A is not covered with a shield member. As a result, the space 10 surrounded by the top plate 9 and the side wall 12 has a magnetic shield space on all surfaces other than the floor facing side A where the feeding coil 5a is embedded.

一方、天板部9の上面からは、上方に向けて扁平箱形状をした垂直な仕切壁13が立設されている。仕切壁13の上端高さは天井高さよりも低く設定されているが、天井高さと同じ高さとしてもよい。本例の仕切壁13の大きさは37V型テレビが設置可能な大きさとされる。   On the other hand, from the upper surface of the top plate portion 9, a vertical partition wall 13 having a flat box shape is erected upward. The upper end height of the partition wall 13 is set lower than the ceiling height, but may be the same height as the ceiling height. The size of the partition wall 13 in this example is set to a size capable of installing a 37V type television.

上記仕切壁13の表側の面13aには、負荷機器1として薄型テレビを設置固定するテレビ設置面14(図2)が設けられている。負荷機器としては、薄型テレビ以外に、DVDレコーダー、LED照明器具、ノートパソコン、ラジオ、ステレオ、チューナー、理美容機器、携帯電話などの各種の電子機器を広く含む。   A television installation surface 14 (FIG. 2) for installing and fixing a thin television as the load device 1 is provided on the front surface 13 a of the partition wall 13. In addition to flat-screen TVs, the load devices widely include various electronic devices such as DVD recorders, LED lighting fixtures, notebook computers, radios, stereos, tuners, hairdressing devices, and mobile phones.

上記テレビ設置面14の下側にはコンセント15が設置されている。コンセント15は、天板部9とシールド部材11aとを貫通する電路50を介して正弦波出力インバータ22の出力側に接続されている。比較的大きな電力を供給可能なコンセント15を設け、薄型テレビの電源コード51の一端に設けられているプラグをコンセント15に差し込むことでテレビを使用できる。なお、コンセント15の設置位置は、仕切壁13以外の什器本体3の側面部や天面部など、適宜に選択自在である。   An outlet 15 is installed below the television installation surface 14. The outlet 15 is connected to the output side of the sine wave output inverter 22 through an electric circuit 50 that passes through the top plate portion 9 and the shield member 11a. A TV 15 can be used by providing an outlet 15 capable of supplying relatively large power and inserting a plug provided at one end of the power cord 51 of the flat-screen TV into the outlet 15. In addition, the installation position of the outlet 15 can be selected as appropriate, such as a side surface portion or a top surface portion of the fixture body 3 other than the partition wall 13.

しかして、上記構成の什器本体3の天板部9と側壁部12とで包囲される空間部10に受電装置6を収納し、空間部10における床対向側A以外の全ての面をシールド部材11a,11bで覆うようにしたので、受電装置6から発生する電磁波が什器本体3の外部に漏洩するのを防止できる。しかも、側壁部12に設けられるシールド部材11bの下端部は床面7近傍位置まで延びているので、磁気シールドされた空間部10が床面7近傍まで延びた状態となる。これにより、床材8内部の給電装置5から発生する高周波磁界が什器本体3の外部に漏洩することがなく、給電効率を高めることができると同時に、空間部10の外部に設置されたすべての負荷機器1に対して電磁波の影響を及ぼさないようにできる。   Thus, the power receiving device 6 is accommodated in the space portion 10 surrounded by the top plate portion 9 and the side wall portion 12 of the fixture body 3 having the above-described configuration, and all surfaces other than the floor facing side A in the space portion 10 are shield members. Since it covered with 11a, 11b, it can prevent that the electromagnetic waves which generate | occur | produce from the power receiving apparatus 6 leak to the exterior of the fixture main body 3. FIG. Moreover, since the lower end portion of the shield member 11b provided on the side wall portion 12 extends to a position near the floor surface 7, the magnetically shielded space portion 10 extends to the vicinity of the floor surface 7. Thereby, the high-frequency magnetic field generated from the power supply device 5 inside the flooring 8 is not leaked to the outside of the fixture body 3, and the power supply efficiency can be increased. The load device 1 can be prevented from being affected by electromagnetic waves.

また本例では、天板部9の上面から立設した扁平箱状の仕切壁13に薄型テレビなどの負荷機器1を設置しているので、仕切壁13周囲の天板部分9a(図1、図2)を、物置きスペースやテーブルとして利用可能となる。また、仕切壁13にコンセント15を設けたので、負荷機器1の電源コード51が仕切壁13内に収まり、外部に垂れて邪魔になることもなくなる。   In this example, since the load device 1 such as a thin-screen television is installed on the flat box-shaped partition wall 13 erected from the upper surface of the top panel portion 9, the top panel portion 9a around the partition wall 13 (FIG. 1, 2) can be used as a storage space or a table. Moreover, since the outlet 15 is provided in the partition wall 13, the power cord 51 of the load device 1 is accommodated in the partition wall 13, and does not hang outside and get in the way.

さらに本例では、什器本体3をキャスター18によって移動可能としたので、床Fの掃除が容易にできる。なお、什器本体3に充電装置(図示せず)を設けておき、給電装置5が埋設されている床面7から離れた床面に什器本体3を移動させたときには、充電装置から負荷機器1への給電を行う構成とすることも可能である。   Furthermore, in this example, since the furniture main body 3 can be moved by the casters 18, the floor F can be easily cleaned. When the fixture body 3 is provided with a charging device (not shown) and the fixture body 3 is moved to a floor surface away from the floor surface 7 in which the power feeding device 5 is embedded, the charging device 1 loads the load device 1. It is also possible to adopt a configuration in which power is supplied to the battery.

図4は、仕切壁13の裏側の面13bに、机機能を持たせた場合の一例を示している。図中の52はDVDレコーダー、19はLED照明器具であり、他の構成は上記実施形態と同様である。本例では、仕切壁13の裏側の面13bの一部を、起倒自在な机16としている。机16を水平に保持した状態では、机16の下方に人が椅子に腰掛けて足を入れ得るスペースが確保される。机16を使わないときは垂直に起立させることでコンパクトに収納できる。仕切壁13の上端側には机16の上面を照らすLED照明器具19が設けられる。このLED照明器具19の電力は受電装置6の正弦波出力インバータ22から供給される。また本例では、机16に正弦波出力インバータ22の出力側と接続される電路を接続し、この電路を介して机16自体が例えばノートパソコンに給電する給電機能を有するものとしている。   FIG. 4 shows an example of a case where the back surface 13b of the partition wall 13 has a desk function. In the figure, 52 is a DVD recorder, 19 is an LED lighting apparatus, and other configurations are the same as those in the above embodiment. In this example, a part of the rear surface 13b of the partition wall 13 is a desk 16 that can be tilted up and down. In a state where the desk 16 is held horizontally, a space where a person can sit on the chair and put his feet under the desk 16 is secured. When the desk 16 is not used, it can be stored compactly by standing vertically. An LED lighting device 19 that illuminates the upper surface of the desk 16 is provided on the upper end side of the partition wall 13. The electric power of the LED lighting device 19 is supplied from the sine wave output inverter 22 of the power receiving device 6. Further, in this example, an electric circuit connected to the output side of the sine wave output inverter 22 is connected to the desk 16, and the desk 16 itself has a power supply function for supplying power to, for example, a notebook computer via this electric circuit.

図5は、仕切壁13の裏側の面13bに、収納機能を持たせた場合の一例を示している。他の構成は図2と同様である。本例では、仕切壁13背後に向けて開口した収納スペース17aを備えると共に、水平の棚板17で上下複数段に仕切られている。これにより、仕切壁13の裏側の面13bを収納スペース17aとして有効利用できる。   FIG. 5 shows an example where the back surface 13 b of the partition wall 13 has a storage function. Other configurations are the same as those in FIG. In this example, the storage space 17a opened toward the back of the partition wall 13 is provided, and the storage shelf 17a is partitioned into a plurality of upper and lower stages by a horizontal shelf board 17. Thereby, the surface 13b on the back side of the partition wall 13 can be effectively used as the storage space 17a.

前記実施形態では、給電装置5は床Fの一部に配置しているが、床Fの略全面に亘って給電装置5を配置してもよいものであり、この場合、什器本体3を任意の位置に移動させて使用可能となる。   In the said embodiment, although the electric power feeder 5 is arrange | positioned in a part of floor F, you may arrange | position the electric power feeder 5 over the substantially whole surface of the floor F, In this case, the fixture main body 3 is arbitrary. It can be used by moving to the position.

前記実施形態では、非接触給電システムの一例として、電磁誘導の原理を用いたエネルギー伝達方式を例示したが、近年注目されている磁界共鳴方式或いは電界共鳴方式を採用してもよい。これらの技術を用いてエネルギーを伝達すれば、1〜2m程度の距離でも高効率でエネルギーを伝達することが可能である(磁界共鳴方式では2mで40%の効率が確認されている)。本発明において、比較的遠方まで高効率でエネルギーを伝達することが可能な磁界或いは電界の共鳴方式を採用すれば、床F内に埋設した給電装置5から離れた場所に什器本体3を移動させた場合でも、負荷機器1への非接触給電を行うことができる。   In the embodiment, the energy transmission method using the principle of electromagnetic induction is exemplified as an example of the non-contact power supply system, but a magnetic field resonance method or an electric field resonance method which has been attracting attention in recent years may be adopted. If energy is transmitted using these techniques, energy can be transmitted with high efficiency even at a distance of about 1 to 2 m (the efficiency of 40% is confirmed at 2 m in the magnetic field resonance method). In the present invention, if a magnetic field or electric field resonance method capable of transmitting energy to a relatively far distance with high efficiency is adopted, the fixture main body 3 is moved to a place away from the power feeding device 5 embedded in the floor F. Even in such a case, contactless power feeding to the load device 1 can be performed.

ところで、非接触給電システムにおいて、給電装置5に常時給電していると無駄な電力消費が生じたり、不要輻射による通信障害を生じたりする可能性がある。そこで、常時は給電装置5と受電装置6との間で、間欠的に通信し、受電装置6から給電の必要が生じたときに給電装置5を連続動作させることにより、受電装置6への給電を行うことが望ましい。また、給電装置5の出力を可変とし、受電装置6からの要求に応じて負荷機器に応じた電気エネルギーの供給を行うようにするのが望ましい。   By the way, in the non-contact power supply system, if power is always supplied to the power supply device 5, there is a possibility that wasteful power consumption may occur or communication failure due to unnecessary radiation may occur. Therefore, the power feeding device 5 and the power receiving device 6 are communicated intermittently between the power feeding device 5 and the power receiving device 6, and when the power feeding device 6 needs to feed power, the power feeding device 5 is continuously operated to feed power to the power receiving device 6. It is desirable to do. In addition, it is desirable that the output of the power feeding device 5 is variable, and electrical energy is supplied according to the load device in response to a request from the power receiving device 6.

1 負荷機器
2 什器
3 什器本体
4 非接触給電ユニット
5 給電装置
6 受電装置
7 床面
9 天板部
10 空間部
11a、11b シールド部材
12 側壁部
13 仕切壁
13a 一方の面
13b 他方の面
A 床対向側
F 床
DESCRIPTION OF SYMBOLS 1 Load apparatus 2 Fixture 3 Fixture main body 4 Non-contact electric power supply unit 5 Power supply apparatus 6 Power receiving apparatus 7 Floor surface 9 Top plate part 10 Space part 11a, 11b Shield member 12 Side wall part 13 Partition wall 13a One side 13b The other side A Floor Opposite side F floor

Claims (3)

給電装置が埋設されている床に什器本体を設置し、この什器本体に、天板部とこの天板部の外周側から床面に向けて延出された側壁部とを設け、前記天板部の上方に負荷機器を配置し、前記天板部と前記側壁部とで囲まれた空間部に、床内部の前記給電装置から非接触で電力を受けて前記負荷機器へ供給する受電装置を収納すると共に、この空間部の床対向側以外のすべての面をシールド部材で覆ったことを特徴とする非接触給電機能付き什器。   A fixture body is installed on the floor where the power feeding device is embedded, and the fixture body is provided with a top plate portion and a side wall portion extending from the outer peripheral side of the top plate portion toward the floor surface, and the top plate A power receiving device that arranges a load device above a section and receives power from the power feeding device inside the floor in a non-contact manner and is supplied to the load device in a space surrounded by the top plate portion and the side wall portion. A fixture with a non-contact power feeding function characterized in that it is housed and all surfaces other than the floor facing side of this space portion are covered with a shield member. 前記天板部の上面から上方に向けて垂直な仕切壁を立設し、この仕切壁の一方の面に前記負荷機器を設置固定することを特徴とする請求項1記載の非接触給電機能付き什器。   The non-contact power supply function according to claim 1, wherein a vertical partition wall is erected upward from an upper surface of the top plate portion, and the load device is installed and fixed on one surface of the partition wall. A fixture. 前記仕切壁の一方の面とは反対側の他方の面に、机機能と収納機能のいずれか一方の機能を持たせたことを特徴とする請求項2記載の非接触給電機能付き什器。
3. The fixture with a non-contact power feeding function according to claim 2, wherein the other surface opposite to the one surface of the partition wall has one of a desk function and a storage function.
JP2010153372A 2010-07-05 2010-07-05 Fixture with contactless power supply function Expired - Fee Related JP5452394B2 (en)

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