JP2004327499A - Wave leakage preventing structure - Google Patents

Wave leakage preventing structure Download PDF

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Publication number
JP2004327499A
JP2004327499A JP2003116044A JP2003116044A JP2004327499A JP 2004327499 A JP2004327499 A JP 2004327499A JP 2003116044 A JP2003116044 A JP 2003116044A JP 2003116044 A JP2003116044 A JP 2003116044A JP 2004327499 A JP2004327499 A JP 2004327499A
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JP
Japan
Prior art keywords
groove
lid
rib
housing
cap
Prior art date
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Granted
Application number
JP2003116044A
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Japanese (ja)
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JP4334265B2 (en
Inventor
Yukihiro Yamaguchi
幸弘 山口
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Sharp Corp
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Sharp Corp
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Publication of JP2004327499A publication Critical patent/JP2004327499A/en
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  • Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a wave leakage preventing structure that can make the leakage of waves hardly occur by maintaining airtightness. <P>SOLUTION: In this wave leakage preventing structure, the top opening of an enclosure 1 is shut with a cap 2 by inserting the ribs 21 of the cap 2 into the grooves 13 of the enclosure 1, and the ribs 21 are hermetically sealed in the grooves 13 by providing sealants 3 in the grooves 13. In addition, an inner cap 4 is provided between the inside piece 11 of the peripheral edge of the upper end of the enclosure 1 and the cap 2 in a state where the cap 4 is closely adhered to the piece 11 and cap 2, and the front ends of the ribs 21 of the cap 2 are fitted in inner grooves formed in the grooves 13 in closely adhering states. Moreover, the front ends of the ribs 21 of the cap 2 are formed in contacting surfaces having L-shaped cross sections by bending the front ends perpendicularly to the erected directions of the ribs 21, and the contacting surfaces are closely adhered to the inner bottom faces of the grooves 13 of the enclosure 1. Since the number of closely adhering sections between the enclosure 1 and the cap 2 is increased, the airtightness of the wave leakage preventing structure is improved and the leakage of waves can be prevented further. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

【０００１】
【発明の属する技術分野】
本発明は、筐体の開口を蓋体によって電波漏れがし難い状態に密閉する構造に関し、例えば衛星放送・衛星通信受信用コンバータ（ＬＮＢ）等に利用される。
【０００２】
【従来の技術】
従来一般に用いられる衛星放送・衛星通信受信用コンバータ（ＬＮＢ）では、図４に示すように、上端周縁部に内側片ａと外側片ｂとを有する溝部ｃが形成された筐体ｄと、この溝部ｃに挿入可能なリブｅが立設された蓋体ｆとを具備し、筐体ｄの溝部ｃに、蓋体ｆのリブｅの部分が挿入されて筐体ｆの上面開口が蓋体ｆによって塞がれるとともに、溝部ｃにシール剤ｇが設けられて溝部ｃ内にリブｅが密閉されていた。
【０００３】
従来は、この溝部ｃに充填されたシール剤ｇによって、リブｅと溝部ｃとの間を密閉して筐体ｄと蓋体ｆとによって閉塞された空間の気密を保つようになされていた。
【０００４】
【発明が解決しようとする課題】
しかし、上記従来のようにシール剤ｇによって気密を保つ構造では、筐体ｄと蓋体ｆとの密着する部分が少ない為に、シール剤ｇの層を電波が通り、電波漏れが起き、漏れ量も大きくなるといった不都合があった。
【０００５】
本発明は、係る実情に鑑みてなされたものであって、気密性を保ち、電波漏れをし難くすることができる電波漏れ防止構造を提供することを目的としている。
【０００６】
【課題を解決するための手段】
上記課題を解決するための本発明の電波漏れ防止構造は、上端周縁部に内側片と外側片とを有する溝部が形成された筐体と、この溝部に挿入可能なリブが立設された蓋体とを具備し、筐体の溝部に、蓋体のリブの部分が挿入されて筐体の上面開口が蓋体によって塞がれるとともに、溝部にシール剤が設けられて溝部内にリブが密閉されてなる構造であって、筐体の上端周縁部の内側片と蓋体との間に、この内側片と蓋体とに密着する中蓋が設けられてなるものである。この中蓋によって、筐体の内側片と蓋体との間の空隙が密閉されるので、シール剤の層に直接電波が漏れ出るのを防止できる。
【０００７】
また、溝部内に中溝部が形成され、この中溝部に蓋体のリブの先端部が嵌合密着するようになされたものであってもよい。この嵌合密着によって蓋体と筐体との密着度合いが増すので、シール剤の層に直接電波が漏れ難くなる。また、上記した中蓋を併用した構造としてもよい。この場合、中蓋によって、筐体の内側片と蓋体との間の空隙が密閉されるとともに、中溝部とリブの先端部との嵌合密着によって蓋体と筐体との密着度合いが増すので、より一層電波が漏れ難くなる。
【０００８】
さらに、蓋体のリブの先端部分がリブの立設方向に対して直交する方向に折り曲げられて断面Ｌ字形状の当接部となされ、この当接部が筐体の溝部内の底面に当接密着するようになされたものである。この当接密着によって蓋体と筐体との密着度合いが増すので、シール剤の層に直接電波が漏れ難くなる。また、上記した中蓋を併用した構造としてもよい。この場合、中蓋によって、筐体の内側片と蓋体との間の空隙が密閉されるとともに、リブの当接部と溝部内の底面との当接密着によって蓋体と筐体との密着度合いが増すので、より一層電波が漏れ難くなる。
【０００９】
【発明の実施例】
以下、本発明の実施の形態を図面を参照して説明する。
【００１０】
図１は、衛星放送・衛星通信受信用コンバータ（ＬＮＢ）の電波漏れ防止構造を示している。
【００１１】
この電波漏れ防止構造は、筐体１と蓋体２とをシール剤３によって密閉する構造であって、筐体１の上端周縁部の内側片１１と蓋体２との間に、この内側片１１と蓋体２とに密着する中蓋４が設けられている。
【００１２】
筐体１は、内部に基板ユニット１０を収納するようになされている。この筐体１の上端周縁部には、内側片１１と外側片１２とを備えた溝部１３が形成されている。内側片１１は、外側片１２よりも高く形成されている。
【００１３】
蓋体２は、その外周縁部にリブ２１が立設されており、このリブ２１の部分は、筐体１の溝部１３内に挿入される高さおよび厚みに形成されている。
【００１４】
シール剤３は、筐体１の溝部１３内に設けられる。このシール剤３としては、溝部１３に設けた後、養生時間を経過することで、弾性を有する状態に硬化するようになされたものが使用される。この筐体１の溝部１３内にシール剤３を設けた後、蓋体２のリブ２１の部分を筐体１の溝部１３内に挿入することで、溝部１３とリブ２１との間の気密が、シール剤３によって保たれ、筐体１と蓋体２とを密閉状態に組み合わせることができる。
【００１５】
中蓋４は、蓋体２の周縁に立設されたリブ２１の内側に納まる弾性を有するシート状に形成されている。この中蓋４は、筐体１の溝部１３に蓋体２のリブ２１の部分を挿入して筐体１と蓋体２とを密閉した状態で、筐体の内側片１１と蓋体２との間隙を埋めることができる厚みに形成されたものが使用される。
【００１６】
この中蓋４を用いた電波漏れ防止構造によると、中蓋４によって筐体１と蓋体２との間の間隙が埋められるので、シール剤３の層に直接電波が漏れ難くなる。
【００１７】
図２は、本発明の電波漏れ防止構造の他の実施の形態を示している。
【００１８】
この電波漏れ防止構造は、筐体１の溝部１３内に中溝部１４が形成され、この中溝部１４に蓋体２のリブ２１の先端部２１ａが嵌合密着するようになされている。
【００１９】
中溝部１４は、溝部１３の底面に形成されてなり、リブ２１の先端部２１ａが嵌合密着するようにしなければならない。この場合、中溝部１４は、深く形成すると、リブ２１の先端部２１ａを深く嵌合密着させることができるが、筐体１は、中溝部１４を深く形成できるだけの肉厚と加工精度が要求される。また、中溝部１４を浅く形成すると、リブ２１の先端部２１ａの嵌合密着が不十分になってしまうことが懸念される。したがって、中溝部１４の深さとしては、できるだけ深くならない範囲で、確実にリブ２１と嵌合密着することができる深さに決定される。この中溝部１４の深さとしては、筐体１や蓋体２ の素材や大きさによって適宜変更されるので、一該に述べることはできないが、本実施の形態では、リブ２１の全体の高さの約１／４程度の先端部２１ａが中溝部１４に嵌合密着するように形成されている。この筐体１の中溝部１４に蓋体２のリブ２１の先端部２１ａが嵌合密着することで、筐体１と蓋体２との密着度合いが増し、シール剤３の層に直接電波が漏れ難くなる。
【００２０】
なお、リブ２１の先端部２１ａと中溝部１４とが嵌合密着し易いように、リブ２１および中溝部１４のうち、少なくとも何れか一方に、テーパ加工が施されていてもよい。
【００２１】
また、この図２に示す電波漏れ防止構造に、図１に示す中蓋４を併用してもよい。この場合、リブ２１の先端部２１ａと中溝部１４とが嵌合密着することによって筐体１と蓋体２との密着度合いが増すのみならず、中蓋４を介しても筐体１と蓋体２との密着度が増すので、より一層電波を漏れ難くすることができる。
【００２２】
図３は、本発明の電波漏れ防止構造のさらに他の実施の形態を示している。
【００２３】
この電波漏れ防止構造は、蓋体２のリブ２１の先端部分がリブ２１の立設方向に対して直交する方向に折り曲げられた断面Ｌ字形状の当接部２１ｂとなされ、この当接部２１ｂが筐体１の溝部１３内の底面に当接密着するようになされている。
【００２４】
当接部２１ｂは、リブ２１の立設方向に対して直交する方向に折り曲げられて、リブ２１が断面Ｌ字形状となるように形成され、筐体１の溝部１３底面に、この当接部２１ｂが密着するようにしなければならない。したがって、当接部２１ｂは、溝部１３の溝幅の範囲内に納まるように形成される。この当接部２１ｂが溝部１３の底面に密着することで、筐体１と蓋体２との密着度合いが増し、シール剤３の層に直接電波が漏れ難くなる。
【００２５】
また、この図３に示す電波漏れ防止構造に、図１に示す中蓋４を併用してもよい。この場合、リブ２１の当接部２１ｂと溝部１３の底面とが嵌合密着することによって筐体１と蓋体２との密着度合いが増すのみならず、中蓋４を介しても筐体１と蓋体２との密着度が増すので、より一層電波を漏れ難くすることができる。
【００２６】
なお、図２および図３において、図１と同部材には同符号を付して説明を省略している。
【００２７】
【発明の効果】
以上述べたように、本発明によると筐体と蓋体との密着する部分が増えることにより、気密性が高まり、より一層に電波漏れをし難くすることができる。
【図面の簡単な説明】
【図１】（ａ）は本発明に係る電波漏れ防止構造の一例である衛星放送・衛生通信受信用コンバータの筐体部分の正面図、（ｂ）は同図（ａ）のＩ−Ｉ 線断面図、（ｃ）は同図（ｂ）の要部拡大図である。
【図２】本発明に係る電波漏れ防止構造の一例である衛星放送・衛生通信受信用コンバータの筐体部分の他の実施の形態を示す要部拡大図である。
【図３】本発明に係る電波漏れ防止構造の一例である衛星放送・衛生通信受信用コンバータの筐体部分のさらに他の実施の形態を示す要部拡大図である。
【図４】（ａ）は従来の衛星放送・衛星通信受信用コンバータの筐体部分を示す平面図、（ｂ）は同図（ａ）のＩＶ−ＩＶ 線断面図、（ｃ）は同図（ｂ）の要部拡大図である。
【符号の説明】
１ 筐体
１１ 内側片
１２ 外側片
１３ 溝部
１４ 中溝部
２ 蓋体
２１ リブ
２１ａ 先端部
２１ｂ 当接部
３ シール剤
４ 中蓋[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a structure in which an opening of a housing is hermetically sealed by a lid so that radio waves do not easily leak, and is used, for example, in a satellite broadcast / satellite communication receiving converter (LNB) or the like.
[0002]
[Prior art]
As shown in FIG. 4, a conventional satellite broadcasting / satellite communication receiving converter (LNB) generally used generally has a housing d having a groove c having an inner piece a and an outer piece b formed at an upper peripheral edge thereof. A lid f on which a rib e insertable into the groove c is provided, wherein the rib e of the lid f is inserted into the groove c of the housing d so that the upper opening of the housing f is f, the sealing agent g was provided in the groove c, and the rib e was sealed in the groove c.
[0003]
Conventionally, the space between the rib e and the groove c is sealed by the sealant g filled in the groove c to keep the space closed by the housing d and the lid f airtight.
[0004]
[Problems to be solved by the invention]
However, in the conventional structure in which the airtightness is maintained by the sealant g as described above, since the portion where the housing d and the lid f are in close contact with each other is small, radio waves pass through the layer of the sealant g and radio wave leakage occurs. There was a disadvantage that the amount became large.
[0005]
The present invention has been made in view of the above circumstances, and has as its object to provide a radio wave leakage prevention structure that can maintain airtightness and make radio wave leakage difficult.
[0006]
[Means for Solving the Problems]
A radio wave leakage prevention structure according to the present invention for solving the above-mentioned problems includes a housing in which a groove having an inner piece and an outer piece is formed at an upper peripheral edge, and a lid in which a rib that can be inserted into the groove is provided upright. Body, the lid portion of the lid is inserted into the groove of the housing, the upper surface opening of the housing is closed by the lid, and a sealing agent is provided in the groove, and the rib is sealed in the groove. In this structure, an inner lid that is in close contact with the inner piece and the lid is provided between the inner piece at the upper edge of the housing and the lid. Since the gap between the inner piece of the housing and the lid is sealed by the inner lid, it is possible to prevent radio waves from leaking directly to the sealant layer.
[0007]
Further, a middle groove may be formed in the groove, and the tip of the rib of the lid may be fitted and adhered to the middle groove. Since the degree of close contact between the lid and the housing is increased by the close fitting, it is difficult for radio waves to leak directly to the sealant layer. Further, a structure in which the above-described inner lid is used in combination may be adopted. In this case, the gap between the inner piece of the housing and the lid is sealed by the inner lid, and the degree of close contact between the lid and the housing is increased by the close fit of the middle groove and the tip of the rib. Therefore, radio waves are more difficult to leak.
[0008]
Further, the tip portion of the rib of the lid is bent in a direction perpendicular to the direction in which the rib is erected to form an abutting portion having an L-shaped cross section, and the abutting portion abuts on the bottom surface in the groove of the housing. It is designed to be in close contact. Since the degree of close contact between the lid and the housing is increased by the contact and close contact, radio waves are unlikely to leak directly to the sealant layer. Further, a structure in which the above-described inner lid is used in combination may be adopted. In this case, the gap between the inner piece of the housing and the lid is sealed by the inner lid, and the lid and the housing are brought into close contact with each other by the contact between the abutment portion of the rib and the bottom surface in the groove. Since the degree increases, radio waves are more difficult to leak.
[0009]
DESCRIPTION OF THE PREFERRED EMBODIMENTS
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0010]
FIG. 1 shows a structure for preventing radio wave leakage of a converter for satellite broadcast / satellite communication reception (LNB).
[0011]
This radio wave leakage prevention structure is a structure in which the casing 1 and the lid 2 are hermetically sealed by the sealant 3, and is provided between the inner piece 11 at the upper peripheral edge of the casing 1 and the lid 2. An inner lid 4 that is in close contact with the lid 11 and the lid 2 is provided.
[0012]
The housing 1 accommodates the board unit 10 therein. A groove 13 having an inner piece 11 and an outer piece 12 is formed in a peripheral edge of an upper end of the housing 1. The inner piece 11 is formed higher than the outer piece 12.
[0013]
The lid 2 has a rib 21 erected on an outer peripheral edge thereof, and the rib 21 is formed to have a height and a thickness to be inserted into the groove 13 of the housing 1.
[0014]
The sealant 3 is provided in the groove 13 of the housing 1. As the sealant 3, a sealant that is provided in the groove portion 13 and is cured to have elasticity after a curing time has elapsed is used. After the sealant 3 is provided in the groove 13 of the housing 1, by inserting the rib 21 of the lid 2 into the groove 13 of the housing 1, the airtightness between the groove 13 and the rib 21 is improved. , The casing 1 and the lid 2 can be combined in a sealed state.
[0015]
The inner lid 4 is formed in an elastic sheet shape that fits inside a rib 21 erected on the periphery of the lid 2. The inner lid 4 is formed by inserting the rib 21 of the lid 2 into the groove 13 of the casing 1 and sealing the casing 1 and the lid 2 to each other. Is formed so as to fill the gap.
[0016]
According to the radio wave leakage prevention structure using the inner lid 4, the gap between the housing 1 and the lid 2 is filled by the inner lid 4, so that it is difficult for electric waves to leak directly to the layer of the sealant 3.
[0017]
FIG. 2 shows another embodiment of the radio wave leakage prevention structure of the present invention.
[0018]
In this radio wave leakage prevention structure, a middle groove 14 is formed in the groove 13 of the housing 1, and the tip 21 a of the rib 21 of the lid 2 is fitted and adhered to the middle groove 14.
[0019]
The middle groove portion 14 is formed on the bottom surface of the groove portion 13 so that the tip portion 21a of the rib 21 must be fitted and adhered. In this case, if the middle groove portion 14 is formed deep, the distal end portion 21a of the rib 21 can be fitted and adhered deeply. However, the housing 1 is required to have a wall thickness and processing accuracy sufficient to form the middle groove portion 14 deep. You. Further, if the middle groove portion 14 is formed shallow, there is a concern that the fitting and adhesion of the tip portion 21a of the rib 21 may be insufficient. Therefore, the depth of the middle groove portion 14 is determined to be a depth at which the middle groove portion 14 can be surely fitted and adhered to the rib 21 within a range not to be as deep as possible. The depth of the middle groove portion 14 cannot be specifically described because it is appropriately changed depending on the material and size of the housing 1 and the lid 2. However, in the present embodiment, the overall height of the rib 21 is not described. A tip portion 21a of about 1/4 of the length is formed so as to fit and adhere to the middle groove portion 14. The tip 21a of the rib 21 of the lid 2 is fitted and adhered to the middle groove 14 of the casing 1 so that the degree of adhesion between the casing 1 and the lid 2 is increased, and radio waves are directly transmitted to the layer of the sealant 3. It becomes hard to leak.
[0020]
Note that at least one of the rib 21 and the middle groove portion 14 may be tapered so that the tip portion 21a of the rib 21 and the middle groove portion 14 are easily fitted and adhered.
[0021]
Further, the inner cover 4 shown in FIG. 1 may be used in combination with the radio wave leakage prevention structure shown in FIG. In this case, not only the degree of close contact between the housing 1 and the cover 2 is increased by the fitting and tight contact between the distal end portion 21a of the rib 21 and the middle groove portion 14, but also the housing 1 and the cover Since the degree of close contact with the body 2 is increased, it is possible to make it more difficult for radio waves to leak.
[0022]
FIG. 3 shows still another embodiment of the radio wave leakage prevention structure of the present invention.
[0023]
This radio wave leakage prevention structure has an abutting portion 21b having an L-shaped cross section in which the tip of the rib 21 of the lid 2 is bent in a direction orthogonal to the direction in which the rib 21 is erected. Is in contact with and close to the bottom surface in the groove 13 of the housing 1.
[0024]
The contact portion 21b is bent in a direction perpendicular to the direction in which the rib 21 is erected, so that the rib 21 has an L-shaped cross section. 21b must be in close contact. Therefore, the contact portion 21b is formed so as to be within the range of the groove width of the groove portion 13. When the contact portion 21b is in close contact with the bottom surface of the groove portion 13, the degree of close contact between the housing 1 and the lid 2 is increased, and radio waves are less likely to leak directly to the layer of the sealant 3.
[0025]
Further, the radio wave leakage prevention structure shown in FIG. 3 may be used together with the inner lid 4 shown in FIG. In this case, the contact portion 21b of the rib 21 and the bottom surface of the groove portion 13 are fitted and adhered, so that not only the degree of adhesion between the housing 1 and the lid 2 is increased, but also the housing 1 Since the degree of adhesion between the cover 2 and the cover 2 is increased, it is possible to make the radio wave more difficult to leak.
[0026]
2 and 3, the same members as those in FIG. 1 are denoted by the same reference numerals, and description thereof is omitted.
[0027]
【The invention's effect】
As described above, according to the present invention, the airtightness is increased by increasing the number of portions where the housing and the lid are in close contact with each other, so that it is possible to make the radio wave leakage more difficult.
[Brief description of the drawings]
FIG. 1A is a front view of a housing portion of a converter for receiving satellite broadcasting and satellite communication which is an example of a radio wave leakage preventing structure according to the present invention, and FIG. 1B is a line II in FIG. FIG. 3C is an enlarged view of a main part of FIG.
FIG. 2 is an enlarged view of a main part showing another embodiment of a housing portion of a converter for receiving satellite broadcasting and satellite communication which is an example of a radio wave leakage prevention structure according to the present invention.
FIG. 3 is an enlarged view of a main part showing still another embodiment of a housing portion of a converter for receiving satellite broadcasting and satellite communication which is an example of a radio wave leakage prevention structure according to the present invention.
4 (a) is a plan view showing a housing portion of a conventional converter for receiving satellite broadcasting / satellite communication, FIG. 4 (b) is a sectional view taken along the line IV-IV of FIG. 4 (a), and FIG. It is a principal part enlarged view of (b).
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Housing 11 Inner piece 12 Outer piece 13 Groove 14 Medium groove 2 Lid 21 Rib 21a Tip 21b Contact part 3 Sealant 4 Inner lid

Claims (5)

上端周縁部に内側片と外側片とを有する溝部が形成された筐体と、この溝部に挿入可能なリブが立設された蓋体とを具備し、
筐体の溝部に、蓋体のリブの部分が挿入されて筐体の上面開口が蓋体によって塞がれるとともに、溝部にシール剤が設けられて溝部内にリブが密閉されてなる構造であって、
筐体の上端周縁部の内側片と蓋体との間に、この内側片と蓋体とに密着する中蓋が設けられてなることを特徴とする電波漏れ防止構造。A housing in which a groove having an inner piece and an outer piece is formed on an upper end peripheral portion, and a lid in which a rib that can be inserted into the groove is provided upright,
The rib portion of the lid is inserted into the groove of the housing, the upper surface opening of the housing is closed by the lid, and a sealing agent is provided in the groove to seal the rib inside the groove. hand,
A radio wave leakage prevention structure, wherein an inner lid that is in close contact with the inner piece and the lid is provided between the inner piece and the lid at the upper edge of the housing. 上端周縁部に内側片と外側片とを有する溝部が形成された筐体と、この溝部に挿入可能なリブが立設された蓋体とを具備し、
筐体の溝部に、蓋体のリブの部分が挿入されて筐体の上面開口が蓋体によって塞がれるとともに、溝部にシール剤が設けられて溝部内にリブが密閉されてなる構造であって、
溝部内に中溝部が形成され、この中溝部に蓋体のリブの先端部が嵌合密着するようになされたことを特徴とする電波漏れ防止構造。A housing in which a groove having an inner piece and an outer piece is formed on an upper end peripheral portion, and a lid in which a rib that can be inserted into the groove is provided upright,
The rib portion of the lid is inserted into the groove of the housing, the upper surface opening of the housing is closed by the lid, and a sealing agent is provided in the groove to seal the rib inside the groove. hand,
A radio wave leakage prevention structure, wherein a middle groove is formed in the groove, and the tip of the rib of the lid is fitted and adhered to the middle groove. 上端周縁部に内側片と外側片とを有する溝部が形成された筐体と、この溝部に挿入可能なリブが立設された蓋体とを具備し、
筐体の溝部に、蓋体のリブの部分が挿入されて筐体の上面開口が蓋体によって塞がれるとともに、溝部にシール剤が設けられて溝部内にリブが密閉されてなる構造であって、
蓋体のリブの先端部分がリブの立設方向に対して直交する方向に折り曲げられて断面Ｌ字形状の当接面となされ、この当接面が筐体の溝部内の底面に当接密着するようになされたことを特徴とする電波漏れ防止構造。A housing in which a groove having an inner piece and an outer piece is formed on an upper end peripheral portion, and a lid in which a rib that can be inserted into the groove is provided upright,
The rib portion of the lid is inserted into the groove of the housing, the upper surface opening of the housing is closed by the lid, and a sealing agent is provided in the groove to seal the rib inside the groove. hand,
The tip of the rib of the lid is bent in a direction perpendicular to the direction in which the rib stands, to form a contact surface having an L-shaped cross section, and the contact surface is in close contact with the bottom surface in the groove of the housing. A radio wave leakage prevention structure characterized by being made to do. 溝部内に中溝部が形成され、この中溝部に蓋体のリブの先端部が嵌合密着するようになされた請求項１記載の電波漏れ防止構造。2. The radio wave leakage prevention structure according to claim 1, wherein a middle groove portion is formed in the groove portion, and a tip end portion of a rib of the lid is fitted and adhered to the middle groove portion. 蓋体のリブの先端部がリブの立設方向に対して直交する方向に折り曲げられて断面Ｌ字形状の当接面となされ、この当接面が筐体の溝部内の底面に当接密着するようになされた請求項１記載の電波漏れ防止構造。The tip of the rib of the lid is bent in a direction perpendicular to the direction in which the rib is erected to form an abutting surface having an L-shaped cross section. The radio wave leakage prevention structure according to claim 1, wherein
JP2003116044A 2003-04-21 2003-04-21 Electric wave leakage prevention structure Expired - Fee Related JP4334265B2 (en)

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JP2010221676A (en) * 2009-03-25 2010-10-07 Munekata Co Ltd Watertight control box
JP2014060307A (en) * 2012-09-19 2014-04-03 Mitsubishi Electric Corp Housing and assembling method of housing

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US9101066B2 (en) 2012-09-19 2015-08-04 Mitsubishi Electric Corporation Casing and assembling method of casing

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