JP3842687B2 - Portable wireless devices - Google Patents

Portable wireless devices Download PDF

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Publication number
JP3842687B2
JP3842687B2 JP2002092335A JP2002092335A JP3842687B2 JP 3842687 B2 JP3842687 B2 JP 3842687B2 JP 2002092335 A JP2002092335 A JP 2002092335A JP 2002092335 A JP2002092335 A JP 2002092335A JP 3842687 B2 JP3842687 B2 JP 3842687B2
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JP
Japan
Prior art keywords
metal vapor
layer
vapor deposition
antenna
portable wireless
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JP2002092335A
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JP2003289355A (en
Inventor
昇 小池
保志 小峰
圭洋 幡野
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Toshiba Corp
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Toshiba Corp
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Description

【０００１】
【発明の属する技術分野】
本発明は、機器筐体に収容設置した内蔵アンテナを有するとともに、前記機器筐体の外表面における少なくとも前記内蔵アンテナを覆う領域に、着色層と金属蒸着層とを積層した化粧フィルムを設けて成る携帯無線機器に関する。
【０００２】
【従来の技術】
例えば、携帯電話機等の携帯無線機器において、昨今では、周知のインモールド成形により、着色されたフィルムを機器筐体(ケーシング)の外表面と一体成形して、上記機器筐体の外面仕上げを行なっているものがある。
【０００３】
さらに昨今では、着色層と金属蒸着層(金属蒸着箔)とから成るフィルムを、インモールド成形によって機器筐体の外表面と一体に成形し、着色層を介して金属蒸着層(金属蒸着箔)を透けて見せることで、輝度の高い金属光沢を有する外面仕上げを行なっているものがある。
【０００４】
【発明が解決しようとする課題】
ところで、機器筐体の内部に内臓アンテナを収容設置している携帯無線機器においては、上述の如く金属蒸着層(金属蒸着箔)を有するフィルムを機器筐体と一体に成形した場合、上記内蔵アンテナが金属蒸着層(金属蒸着箔)によって覆われることとなる。
【０００５】
このため、内蔵アンテナは金属蒸着層(金属蒸着箔)によってシールドされてしまい、上記内蔵アンテナに対する電波の送受信が妨害されることによって、携帯無線機器における送受信性能が著しく低下してしまう不都合があった。
【０００６】
本発明は上記実状に鑑みて、機器筐体の外表面に金属蒸着層を設けたことに起因する送受信性能の低下を未然に防止し得る携帯無線機器の提供を目的とするものである。
【０００７】
【課題を解決するための手段】
本発明に関わる電子機器筐体は、機器筐体に収容設置した内蔵アンテナを有するとともに、前記機器筐体の外表面における少なくとも前記内蔵アンテナを覆う領域に、着色層と金属蒸着層とを積層した化粧フィルムを設けて成る携帯無線機器であって、前記化粧フィルムにおける前記金属蒸着層に、前記内蔵アンテナに送受される電波の通過を許容する間隙を設けたことを特徴としている。
【０００８】
【発明の実施の形態】
以下、本発明の実施例を、図面を参照しながら詳細に説明する。
図１〜図４は、携帯無線機器の一態様である折り畳み式携帯電話機に、本発明を適用した一実施例を示している。
【０００９】
この携帯電話機１は、図示していないダイヤルキー等が設けられた本体側筐体(機器筐体)２と、図示していない液晶表示部等が設けられ且つ上記本体側筐体２に対して開閉自在に連結された蓋体側筐体(機器筐体)３とを具備している。
【００１０】
上記蓋体側筐体３は、互いに組み付けられた正面ケース４および背面ケース５と、該背面ケース５の外表面に取り付けられた化粧板６とを有しており、上記蓋体側筐体３の内部には回路基板７が収容設置されているとともに、この回路基板７には背面ケース５に臨む態様で内蔵アンテナ８が実装されている。
【００１１】
上記蓋体側筐体３を構成する化粧板６の外表面には、化粧フィルム１０が周知のインモールド成形により一体に成形されている。
この化粧フィルム１０は、カラーインク等の着色層１１と、金属蒸着箔から成る金属蒸着層１２とを有しており、着色層１１を外側に露呈させた態様で化粧板６の外表面に一体成形されている。
【００１２】
ここで、化粧板６の外表面に化粧フィルム１０がインモールド成形されていることにより、蓋体側筐体３の内部に収容設置されている内蔵アンテナ８は、上記化粧フィルム１０を構成する金属蒸着層１２によって覆われることとなる。
【００１３】
一方、上記化粧フィルム１０の金属蒸着層１２は、図４に示す如く、互いに連続することなく斑点状に集合した多数の点状箔部( 点状層部 )１２ａを有し、互いに隣接する点状箔部１２ａの間には、上述した内蔵アンテナ８に送受される電波の通過を許容する間隙１２ｂが設けられている。
【００１４】
ここで、上記金属蒸着層１２を構成する多数の点状箔部１２ａは、それぞれ同一の矩形状を呈し且つ等しい間隔で縦横に配列されており、点状箔部１２ａの間に設けられた間隙１２ｂは格子状を呈している。
【００１５】
なお、実施例の金属蒸着層１２において、各点状箔部１２ａは約０．８mm角の大きさに形成されており、１平方ｃｍ当たりでは約６０個の点状箔部１２ａが形成されている。
【００１６】
上述した構成の携帯電話機１では、蓋体側筐体３を構成する化粧板６の外表面に化粧フィルム１０をインモールド成形したことにより、上記化粧フィルム１０の着色層１１を介して金属蒸着層１２を透けて見せることで、輝度の高い金属光沢を備えた外観が得られることとなる。
【００１７】
また、上述した構成の携帯電話機１では、蓋体側筐体３に収容設置された内蔵アンテナ８が、化粧板６の外表面に一体成形された化粧フィルム１０の金属蒸着層１２によって覆われるものの、内蔵アンテナ８に送受される電波は金属蒸着層１２に設けられた間隙１２ｂを通過するため、送受信性能の低下を未然に防止することが可能となる。
【００１８】
言い換えれば、機器筐体３において内蔵アンテナ８を覆う領域であっても、金属光沢を備えた外観を得るための金属蒸着層１２を設けることができ、携帯電話機１の設計時におけるデザインの自由度が広がることとなる。
【００１９】
なお、上述した携帯電話機１においては、蓋体側筐体３を構成する化粧板６にのみ、金属蒸着層１２を有する化粧フィルム１０をインモールド成形しているが、蓋体側筐体３の外周面全体、更には本体側筐体２の外周面全体にも、化粧フィルム１０をインモールド成形し得ることは言うまでもない。
【００２０】
また、金属蒸着層１２における各点状箔部１２ａの大きさ(面積)や、隣接する点状箔部１２ａ同士の間隔等は、上述した実施例に限定されるものではなく、諸条件に基づいて任意に設定することが可能である。
【００２１】
また、金属蒸着層１２の単位面積当たりに間隙１２ｂの占める割合も、電波の通過程度、すなわち内蔵アンテナ８における送受信の状況に鑑みて、任意に設定し得ることは言うまでもない。
【００２２】
さらに、各点状箔部１２ａの大きさや、点状箔部１２ａ同士の間隔は、金属蒸着層１２の全域に亘って一律である必要はなく、金属蒸着層１２の場所毎に変化させる等、諸条件に基づいて任意に設定することも可能である。
【００２３】
また、実施例における化粧フィルム１０の金属蒸着層１２は、矩形状を呈する多数の点状箔部１２ａと、格子状を呈する間隙１２ｂとを有しているが、上記金属蒸着層の構成は上述した実施例のみに限定されるものではない。
【００２４】
図５は、化粧フィルムにおける金属蒸着層の他の実施例を示しており、該実施例における金属蒸着層１２′は、円形状を呈する多数の点状箔部( 点状層部 )１２ａ′が、互いに連続することなく斑点状に集合しているとともに、互いに隣接する点状箔部１２ａ′の間には、電波の通過を許容する間隙１２ｂ′が設けられている。
【００２５】
図６は、化粧フィルムにおける金属蒸着層の更に他の実施例を示しており、該実施例における金属蒸着層１２″は、直線状を呈する多数の線状箔部( 線状層部 )１２ａ″が、互いに連続することなく縞状に集合しているとともに、互いに隣接する線状箔部１２ａ″の間には、電波の通過を許容する間隙１２ｂ″が設けられている。
【００２６】
図４〜図６に示した如く、金属蒸着層の形状としては、極めて多様なパターンを採用することが可能であり、勿論、上述した各実施例に限定されるものでないことは言うまでもない。
【００２７】
また、上述した金属蒸着層１２′、１２″においても、点状箔部１２ａ′および線状箔部１２ａ″の大きさや、間隙１２ｂ′、１２ｂ″の形状等は、諸条件に基づいて任意に設定することが可能である。
【００２８】
したがって、金属蒸着層における箔部(点状箔部、線状箔部)の形状や大きさを変える、あるいは上記箔部のレイアウトに変化を持たせる等の工夫により、例えば魚鱗の如き金属光沢を有する等の、独特な外面仕上げを携帯電話機の外表面に施すことも可能となる。
【００２９】
なお、上述した各実施例では、金属蒸着層を有する化粧フィルムをインモールド成形することで、機器筐体の外表面に金属蒸着箔を設けている携帯電話機を例示したが、インモールド成形以外の方法で、機器筐体の外表面に金属蒸着箔を設けた携帯電話機に対しても、本発明が有効に適用されることは勿論である。
【００３０】
また、上述した実施例においては、携帯無線機器の一態様である折り畳み式携帯電話機に本発明を適用した例を示したが、極く一般的な構成の携帯電話機に対しても本発明を適用することは可能であり、さらにＰＤＡ（パーソナル・データ・アシスタンス）等、携帯電話機以外の様々な携帯無線機器に対しても、本発明を有効に適用し得ることは言うまでもない。
【００３１】
【発明の効果】
以上、詳述した如く、本発明に関わる電子機器筐体は、機器筐体に収容設置した内蔵アンテナを有するとともに、前記機器筐体の外表面における少なくとも前記内蔵アンテナを覆う領域に、着色層と金属蒸着層とを積層した化粧フィルムを設けて成る携帯無線機器であって、前記化粧フィルムにおける前記金属蒸着層に、前記内蔵アンテナに送受される電波の通過を許容する間隙を設けたことを特徴としている。
【００３２】
上述した構成によれば、機器筐体の外表面に設けられた化粧フィルムの金属蒸着層によって内蔵アンテナが覆われている状況であっても、上記内蔵アンテナに送受される電波は金属蒸着層に設けられた間隙を通過するために、携帯無線機器における送受信性能の低下を未然に防止することが可能となる。
【００３３】
したがって、本発明に関わる携帯無線機器によれば、機器筐体を化粧フィルムの金属蒸着層による金属光沢を備えた外面仕上げとしつつ、内蔵アンテナにおける送受信性能を十分に確保することが可能となる。
【図面の簡単な説明】
【図１】 本発明に関わる携帯無線機器の一実施例である携帯電話機を示す外観図。
【図２】 図１中の II−II 線断面図。
【図３】 図２中の要部を拡大して示す断面図。
【図４】 金属蒸着層の一実施例を示す要部拡大平面図。
【図５】 金属蒸着層の他の実施例を示す要部拡大平面図。
【図６】 金属蒸着層の更に他の実施例を示す要部拡大平面図。
【符号の説明】
１…携帯電話機(携帯無線機器)、
３…蓋体側筐体(機器筐体)、
４…正面ケース、
５…背面ケース、
６…化粧板、
１０…化粧フィルム、
１１…着色層、
１２…金属蒸着層、
１２ａ…点状箔部( 点状層部 )、
１２ｂ…間隙、
１２′…金属蒸着層、
１２ａ′…点状箔部( 点状層部 )、
１２ｂ′…間隙、
１２″…金属蒸着層、
１２ａ″…線状箔部( 線状層部 )、
１２ｂ″…間隙。[0001]
BACKGROUND OF THE INVENTION
The present invention has a built-in antenna housed and installed in a device housing , and is provided with a decorative film in which a colored layer and a metal vapor deposition layer are laminated on at least a region covering the built-in antenna on the outer surface of the device housing. The present invention relates to a portable wireless device.
[0002]
[Prior art]
For example, in portable wireless devices such as mobile phones, recently, the outer surface of the device casing is finished by integrally forming a colored film with the outer surface of the device casing (casing) by well-known in-mold molding. There is something that is.
[0003]
Furthermore, in recent years, a film composed of a colored layer and a metal vapor-deposited layer (metal vapor-deposited foil) is formed integrally with the outer surface of the device casing by in-mold molding, and the metal vapor-deposited layer (metal vapor-deposited foil) is formed through the colored layer. Some of them have an exterior finish with a high-brightness metallic luster.
[0004]
[Problems to be solved by the invention]
By the way, in the portable wireless device in which the built-in antenna is accommodated and installed inside the device housing, when the film having the metal vapor deposition layer (metal vapor deposition foil) is formed integrally with the device housing as described above, the built-in antenna Is covered with a metal vapor deposition layer (metal vapor deposition foil).
[0005]
For this reason, the built-in antenna is shielded by a metal vapor deposition layer (metal vapor deposition foil), and transmission / reception performance of the portable wireless device is significantly deteriorated due to interference with radio wave transmission / reception with respect to the built-in antenna. .
[0006]
In view of the above situation, an object of the present invention is to provide a portable wireless device that can prevent a decrease in transmission / reception performance caused by providing a metal vapor deposition layer on the outer surface of a device housing.
[0007]
[Means for Solving the Problems]
An electronic device housing according to the present invention has a built-in antenna housed and installed in the device housing, and a colored layer and a metal deposition layer are laminated on at least a region covering the built-in antenna on the outer surface of the device housing . a portable wireless device comprising providing a decorative film, the metallized layer in the decorative film, is characterized in that a gap to permit passage of radio waves sent and received in the internal antenna.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
1 to 4 show an embodiment in which the present invention is applied to a foldable mobile phone which is an aspect of a mobile wireless device.
[0009]
The mobile phone 1 is provided with a body side housing (equipment housing) 2 provided with dial keys (not shown), a liquid crystal display unit (not shown), and the like. A lid-side casing (equipment casing) 3 that is openably and closably connected is provided.
[0010]
The lid body case 3 includes a front case 4 and a back case 5 assembled to each other, and a decorative plate 6 attached to the outer surface of the back case 5. The circuit board 7 is accommodated and installed, and a built-in antenna 8 is mounted on the circuit board 7 so as to face the back case 5.
[0011]
A decorative film 10 is integrally formed on the outer surface of the decorative plate 6 constituting the lid side housing 3 by a known in-mold molding.
This decorative film 10 has a colored layer 11 such as a color ink and a metal vapor-deposited layer 12 made of a metal vapor-deposited foil, and is integrated with the outer surface of the decorative plate 6 in such a manner that the colored layer 11 is exposed to the outside. Molded.
[0012]
Here, since the decorative film 10 is molded in-mold on the outer surface of the decorative plate 6, the built-in antenna 8 accommodated and installed in the lid body side housing 3 is a metal vapor deposition constituting the decorative film 10. It will be covered by the layer 12.
[0013]
On the other hand, the metal vapor-deposited layer 12 of the decorative film 10 has a large number of dot-like foil portions ( dot-like layer portions ) 12a assembled in a spot shape without being continuous with each other, as shown in FIG. A gap 12b that allows passage of radio waves transmitted to and received from the built-in antenna 8 is provided between the foil portions 12a.
[0014]
Here, the many point-like foil portions 12a constituting the metal vapor-deposited layer 12 each have the same rectangular shape and are arranged vertically and horizontally at equal intervals, and gaps provided between the point-like foil portions 12a. 12b has a lattice shape.
[0015]
In addition, in the metal vapor deposition layer 12 of an Example, each dotted | punctate foil part 12a is formed in the magnitude | size of about 0.8 mm square, and about 60 dotted | punctate foil parts 12a are formed per 1 square cm. Yes.
[0016]
In the mobile phone 1 configured as described above, the decorative film 10 is formed in-mold on the outer surface of the decorative plate 6 constituting the lid-side casing 3, so that the metal vapor deposition layer 12 is interposed through the colored layer 11 of the decorative film 10. By showing through, an appearance having a high-brightness metallic luster can be obtained.
[0017]
Further, in the mobile phone 1 having the above-described configuration, the built-in antenna 8 accommodated and installed in the lid-side housing 3 is covered with the metal vapor deposition layer 12 of the decorative film 10 integrally formed on the outer surface of the decorative plate 6. Since the radio waves transmitted to and received by the built-in antenna 8 pass through the gap 12b provided in the metal vapor deposition layer 12, it is possible to prevent the transmission / reception performance from being lowered.
[0018]
In other words, even in the region covering the built-in antenna 8 in the device housing 3, the metal vapor deposition layer 12 for obtaining an appearance having a metallic luster can be provided, and the degree of freedom in design when the mobile phone 1 is designed. Will spread.
[0019]
In the mobile phone 1 described above, the decorative film 10 having the metal vapor-deposited layer 12 is formed in-mold only on the decorative plate 6 constituting the lid-side casing 3, but the outer peripheral surface of the lid-side casing 3 Needless to say, the decorative film 10 can be formed in-mold on the entire outer surface of the main body side housing 2.
[0020]
Moreover, the size (area) of each point-like foil part 12a in the metal vapor deposition layer 12, the interval between adjacent point-like foil parts 12a, and the like are not limited to the above-described embodiments, and are based on various conditions. Can be set arbitrarily.
[0021]
In addition, it goes without saying that the ratio of the gap 12b per unit area of the metal vapor deposition layer 12 can be arbitrarily set in view of the degree of radio wave passing, that is, the state of transmission / reception in the built-in antenna 8.
[0022]
Furthermore, the size of each point-like foil part 12a and the interval between the point-like foil parts 12a do not need to be uniform over the entire area of the metal vapor deposition layer 12, and are changed for each location of the metal vapor deposition layer 12, etc. It is also possible to arbitrarily set based on various conditions.
[0023]
Moreover, although the metal vapor deposition layer 12 of the decorative film 10 in an Example has many dotted | punctate foil parts 12a which exhibit rectangular shape, and the space | gap 12b which exhibits a grid | lattice form, the structure of the said metal vapor deposition layer is the above-mentioned. It is not limited only to the embodiment.
[0024]
FIG. 5 shows another embodiment of the metal vapor-deposited layer in the decorative film. The metal vapor-deposited layer 12 ′ in this embodiment has a large number of dot-like foil portions ( dot-like layer portions ) 12a ′ having a circular shape. A gap 12b ′ that allows the passage of radio waves is provided between spot-like foil portions 12a ′ that are adjacent to each other and are spot-like without being continuous with each other.
[0025]
FIG. 6 shows still another embodiment of the metal vapor-deposited layer in the decorative film, and the metal vapor-deposited layer 12 ″ in this embodiment has a number of linear foil portions ( linear layer portions ) 12a ″ that are linear. However, gaps 12b ″ that allow the passage of radio waves are provided between the linear foil portions 12a ″ that are adjacent to each other and that are gathered in stripes without being continuous with each other.
[0026]
As shown in FIGS. 4 to 6, it is possible to adopt extremely various patterns as the shape of the metal vapor deposition layer, and it goes without saying that the present invention is not limited to the above-described embodiments.
[0027]
Also in the above-described metal vapor-deposited layers 12 'and 12 ", the size of the dotted foil portions 12a' and the linear foil portions 12a" and the shapes of the gaps 12b 'and 12b "are arbitrarily determined based on various conditions. It is possible to set.
[0028]
Therefore, by changing the shape and size of the foil portion (dotted foil portion, linear foil portion) in the metal vapor-deposited layer, or by changing the layout of the foil portion, a metallic luster such as fish scales can be obtained. It is also possible to apply a unique outer surface finish to the outer surface of the mobile phone.
[0029]
In addition, in each Example mentioned above, although the mobile phone which provided the metal vapor deposition foil in the outer surface of an apparatus housing | casing was illustrated by carrying out the in-mold shaping | molding of the decorative film which has a metal vapor deposition layer, Of course, the present invention is also effectively applied to a mobile phone in which a metal vapor-deposited foil is provided on the outer surface of the device casing.
[0030]
Further, in the above-described embodiments, the example in which the present invention is applied to the foldable mobile phone which is one aspect of the mobile wireless device is shown, but the present invention is also applied to a mobile phone having a very general configuration. Needless to say, the present invention can be effectively applied to various portable wireless devices other than mobile phones, such as PDA (Personal Data Assistance).
[0031]
【The invention's effect】
As described above in detail, the electronic device casing according to the present invention has a built-in antenna accommodated and installed in the device casing, and at least a region covering the built-in antenna on the outer surface of the device casing is provided with a colored layer. a portable wireless device comprising providing a decorative film laminated a metallized layer, characterized in that the said metallized layer in the decorative film, provided with a gap allowing the passage of radio waves sent and received in the internal antenna It is said.
[0032]
According to the above-described configuration, even when the built-in antenna is covered by the metal vapor deposition layer of the decorative film provided on the outer surface of the device casing, the radio waves transmitted to and received from the built-in antenna are transmitted to the metal vapor deposition layer . Since it passes through the provided gap, it is possible to prevent a decrease in transmission / reception performance in the portable wireless device.
[0033]
Therefore, according to the portable wireless device according to the present invention, it is possible to sufficiently ensure the transmission / reception performance of the built-in antenna while the device casing has an outer surface finish having a metallic luster by the metal vapor deposition layer of the decorative film .
[Brief description of the drawings]
FIG. 1 is an external view showing a mobile phone which is an embodiment of a mobile wireless device according to the present invention.
FIG. 2 is a sectional view taken along line II-II in FIG.
FIG. 3 is an enlarged cross-sectional view showing a main part in FIG.
FIG. 4 is an enlarged plan view of a main part showing one embodiment of a metal vapor deposition layer.
FIG. 5 is an enlarged plan view of a main part showing another embodiment of the metal vapor deposition layer.
FIG. 6 is an enlarged plan view of a main part showing still another embodiment of the metal vapor deposition layer.
[Explanation of symbols]
1 ... Mobile phone (mobile wireless device),
3 ... Cover side casing (equipment casing),
4 ... Front case,
5 ... Back case,
6 ...
10 ... cosmetic film,
11 ... colored layer,
12 ... Metal vapor deposition layer ,
12a ... point-like foil part ( point-like layer part ) ,
12b: gap,
12 '... metal vapor deposition layer ,
12a '... point-like foil part ( point-like layer part ) ,
12b '... gap,
12 "... metal deposition layer ,
12a "... linear foil part ( linear layer part ) ,
12b ″ —the gap.

Claims (3)

機器筐体に収容設置した内蔵アンテナを有するとともに、前記機器筐体の外表面における少なくとも前記内蔵アンテナを覆う領域に、着色層と金属蒸着層とを積層した化粧フィルムを設けて成る携帯無線機器であって、
前記化粧フィルムにおける前記金属蒸着層に、前記内蔵アンテナに送受される電波の通過を許容する間隙を設けたことを特徴とする携帯無線機器。A portable wireless device having a built-in antenna housed and installed in a device casing, and a decorative film in which a colored layer and a metal vapor deposition layer are laminated at least in a region covering the built-in antenna on the outer surface of the device casing There,
Portable wireless device in which the said metallized layer in the decorative film, characterized in that a gap to permit passage of radio waves sent and received in the internal antenna. 前記金属蒸着層は、互いに連続することなく斑点状に集合した多数の点状層部を有し、隣接する点状層部の間に前記間隙が設けられていることを特徴とする請求項１記載の携帯無線機器。2. The metal vapor deposition layer has a large number of dot-like layer portions gathered in a spot shape without being continuous with each other, and the gap is provided between adjacent dot-like layer portions. The portable wireless device described. 前記金属蒸着層は、互いに連続することなく縞状に集合した多数の線状層部を有し、隣接する線状層部の間に前記間隙が設けられていることを特徴とする請求項１記載の携帯無線機器。2. The metal vapor deposition layer has a large number of linear layer portions gathered in a stripe pattern without being continuous with each other, and the gap is provided between adjacent linear layer portions. The portable wireless device described.
JP2002092335A 2002-03-28 2002-03-28 Portable wireless devices Expired - Fee Related JP3842687B2 (en)

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JP2008205590A (en) * 2007-02-16 2008-09-04 Tokai Rika Co Ltd Communication terminal
KR20140112325A (en) * 2013-03-13 2014-09-23 삼성전자주식회사 Electronic device and method for forming thereof
KR101333666B1 (en) * 2013-08-09 2013-11-27 (주)드림텍 Antenna module
CN107231772B (en) * 2017-07-19 2020-07-21 Oppo广东移动通信有限公司 Mobile terminal rear shell, manufacturing method of mobile terminal rear shell and mobile terminal
JP6789586B1 (en) * 2020-01-16 2020-11-25 山本印刷株式会社 Outer member for communication equipment

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