JP5194084B2 - Earth strap - Google Patents

Earth strap Download PDF

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JP5194084B2
JP5194084B2 JP2010225786A JP2010225786A JP5194084B2 JP 5194084 B2 JP5194084 B2 JP 5194084B2 JP 2010225786 A JP2010225786 A JP 2010225786A JP 2010225786 A JP2010225786 A JP 2010225786A JP 5194084 B2 JP5194084 B2 JP 5194084B2
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folded
conductive film
conductive
adhesive tape
film strip
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JP2012079623A (en
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剛 倉本
真実 室田
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Seiwa Electric Mfg Co Ltd
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Seiwa Electric Mfg Co Ltd
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Description

本発明は、電子機器の金属フレームとプリント基板との間を接続し、伝導ノイズをグランディングするアースストラップに関する。   The present invention relates to an earth strap that connects a metal frame of an electronic device and a printed circuit board to ground conductive noise.

この種のアースストラップとしては、細い導線を編み合わせた編導線と、該編導線を被覆した状態で熱収縮させることにより、上記編導線を圧縮保持する熱収縮テープとを有するものがある（実公平０７−０５１６９３号公報）。
また、他のアースストラップとしては、薄い金属板で形成され、細幅をした導電部の少なくとも一端に幅寸法が大きい圧着部を有するフラット導電体と、前記フラット導電体の前記導電部を被覆する絶縁被覆とを備える被覆電線であって、前記圧着部にはネジ取付穴が開口され、前記絶縁被覆は長さ方向の端部が前記ネジ取付穴に近接ないし接する位置まで延長されているものである（特開２００７−２９９６５９号公報）。 This type of ground strap includes a braided wire knitted with thin conducting wires and a heat-shrinkable tape that compresses and holds the braided wire by heat shrinking in a state of covering the braided wire (actual No. 07-051693).
In addition, as another ground strap, a flat conductor having a crimp portion having a large width dimension at least at one end of a narrow conductive portion formed of a thin metal plate and covering the conductive portion of the flat conductor. A covered electric wire provided with an insulating coating, wherein a screw mounting hole is opened in the crimping portion, and the insulating coating is extended to a position where the end in the length direction is close to or in contact with the screw mounting hole. (Japanese Patent Laid-Open No. 2007-299659).

実公平０７−０５１６９３号公報No. 07-051693 特開２００７−２９９６５９号公報JP 2007-299659 A

この種のアースストラップは、例えば、液晶テレビに使用されており、非常に狭い隙間を折り曲げられた状態で縫うように通されている。このため、優れた周波数特性はもちろんのこと、高屈曲性を要求されている。
編導線を有するタイプのものは、高周波特性には優れているが、耐屈曲性に乏しいという問題点がある。
また、薄い金属板を有するタイプのものは、編導線タイプより耐屈曲性は改善されているが、高屈曲性を有しているとまではいえないのが現状である。 This type of earth strap is used, for example, in a liquid crystal television, and is passed through so as to sew a very narrow gap in a folded state. For this reason, not only excellent frequency characteristics but also high flexibility is required.
A type having a braided wire is excellent in high-frequency characteristics, but has a problem of poor bending resistance.
In addition, the type having a thin metal plate has improved bending resistance as compared to the braided wire type, but the present situation is that it cannot be said to have high flexibility.

本発明は、上記事情に鑑みて創案されたもので、高い屈曲性を有し確実な導通（グランディングを）を確保することができるアースストラップを提供することを目的としている。   The present invention has been made in view of the above circumstances, and an object thereof is to provide an earth strap having high flexibility and ensuring reliable conduction (grounding).

本発明に係るアースストラップは、絶縁性フィルムの一面に導電性を有する導電層が形成された導電フィルム帯と、この導電フィルム帯の両端を導電層を外側にして折り返す際に、内側に位置する絶縁性フィルム同士を密着させる両面接着テープと、両端が折り返された導電フィルム帯の表裏両面をカバーする絶縁性を有する保護フィルム帯とを備えており、前記両面接着テープの端部は、導電フィルム帯の内側端部より折り返し端面側に位置し、前記保護フィルム帯は、絶縁性フィルム帯の折り返された両端の外側一部をカバーしていない。 The ground strap according to the present invention is positioned inside when a conductive film band having a conductive layer formed on one surface of an insulating film is formed, and when both ends of the conductive film band are folded back with the conductive layer outside. A double-sided adhesive tape that insulates the insulating films; and a protective film band having insulation properties that covers both the front and back surfaces of the conductive film band folded at both ends. Located on the folded end face side from the inner end of the band, the protective film band does not cover a part of the outer side of the folded end of the insulating film band.

前保護フィルム帯でカバーされていない導電フィルム帯の外側一部にはネジ孔が開設されている。   A screw hole is formed in a part of the outer side of the conductive film band not covered with the front protective film band.

前記ネジ孔は、当該ネジ孔を貫通するネジのワッシャーの縁部が、導電フィルム帯を折り返す際の折り返し端面より内側になる位置に開設されている。   The screw hole is opened at a position where the edge portion of the screw washer penetrating the screw hole is located inside the folded end surface when the conductive film strip is folded.

本発明に係るアースストラップは、絶縁性フィルムに導電層を形成した導電フィルムを導電層が外側になるように折り返すことで、表裏両面で導通を確保しているため、従来のこの種のアースストラップより高い屈曲性を有している。   The ground strap according to the present invention is such that a conductive film in which a conductive layer is formed on an insulating film is folded back so that the conductive layer is on the outside, thereby ensuring conduction on both the front and back surfaces. It has higher flexibility.

特に、ネジ孔を貫通するネジのワッシャーの縁部が、導電フィルム帯を折り返す際の折り返し端面より内側に位置するため、ネジを締めつけても導電層の破断が生じにくい。   In particular, since the edge portion of the screw washer penetrating the screw hole is located on the inner side of the folded end surface when the conductive film strip is folded, the conductive layer is not easily broken even if the screw is tightened.

本発明の実施の形態に係るアースストラップの概略的平面図である。It is a schematic plan view of the ground strap according to the embodiment of the present invention. 本発明の実施の形態に係るアースストラップの図面であって、同図（Ａ）は図１のＡ−Ａ線断面図、同図（Ｂ）は図１のＢ−Ｂ線断面図、同図（Ｃ）は図１のＣ−Ｃ線断面図である。BRIEF DESCRIPTION OF THE DRAWINGS It is drawing of the ground strap which concerns on embodiment of this invention, Comprising: The figure (A) is the sectional view on the AA line of FIG. 1, The same figure (B) is the sectional view on the BB line of FIG. (C) is CC sectional view taken on the line of FIG. 本発明の実施の形態に係るアースストラップを構成する導電フィルム帯の図面であって、同図（Ａ）は折り返し部を折り返す前の状態を示す概略的平面図、同図（Ｂ）は折り返し部を折り返す前の状態でかつ両面接着テープを取り付けた状態の概略的平面図である。BRIEF DESCRIPTION OF THE DRAWINGS It is drawing of the electrically conductive film band which comprises the earth strap which concerns on embodiment of this invention, Comprising: The same figure (A) is a schematic plan view which shows the state before folding | returning a folding | returning part, FIG. FIG. 2 is a schematic plan view of a state before folding back and with a double-sided adhesive tape attached. 本発明の実施の形態に係るアースストラップの概略的分解側面断面図である。1 is a schematic exploded side sectional view of an earth strap according to an embodiment of the present invention. 本発明の実施の形態に係るアースストラップの概略的側面断面図である。It is a schematic side sectional view of an earth strap according to an embodiment of the present invention. 本発明の実施の形態に係るアースストラップとワッシャーとの関係を示す概略的平面図である。It is a schematic plan view which shows the relationship between the ground strap which concerns on embodiment of this invention, and a washer.

なお、本発明に係るアースストラップ１００は、非常に薄いものであるため、実際の寸法比率で作図すると厚さ方向がまったくわからなくなるので、特に厚さ方向の寸法は極端に誇張して作図してある。   Since the ground strap 100 according to the present invention is very thin, the thickness direction cannot be understood at all if the actual dimensional ratio is used, so the dimensions in the thickness direction are particularly exaggerated. is there.

本発明に係るアースストラップ１００は、絶縁性フィルム１１１の一面に導電性を有する導電層１１２が形成された導電フィルム帯１１０と、この導電フィルム帯１１０の両端を導電層１１２を外側にして折り返す際に、内側に位置する絶縁性フィルム１１１同士を密着させる両面接着テープ１２０と、両端が折り返された導電フィルム帯１１０の表裏両面をカバーする絶縁性を有する保護フィルム帯１３０Ａ、１３０Ｂとを備えており、前記両面接着テープ１２０の端部１２１は、導電フィルム帯１１０の内側端部１１１ｂより折り返し端面１５０側に位置し、前記保護フィルム帯１３０Ａ、１３０Ｂは、絶縁性フィルム帯１１１の折り返された両端の外側一部をカバーしていない構成になっている。 The ground strap 100 according to the present invention is formed by folding a conductive film band 110 having a conductive layer 112 having conductivity on one surface of an insulating film 111 and folding both ends of the conductive film band 110 with the conductive layer 112 facing outside. In addition, a double-sided adhesive tape 120 that closely contacts the insulating films 111 positioned inside, and protective film bands 130A and 130B having insulating properties that cover both the front and back surfaces of the conductive film band 110 folded at both ends are provided. The end portion 121 of the double-sided adhesive tape 120 is positioned closer to the folded end surface 150 than the inner end portion 111b of the conductive film strip 110, and the protective film strips 130A and 130B are located at both ends of the insulating film strip 111 folded. The outer part is not covered.

前記導電フィルム帯１１０は、例えば、ＰＥＴ樹脂からなる絶縁性フィルム１１１の一面に導電層１１２として導電性を有する金属からなる金属層を形成したものである。この導電フィルム帯１１０は、図３に示すように、帯状の本体部１１０Ａと、この本体部１１０Ａの両端に折り返し部１１０Ｂが形成されている。本体部１１０Ａと折り返し部１１０Ｂとの境目は、折り返しが容易になるように、両側から切込部１１０Ｃが形成されているので、本体部１１０Ａと折り返し部１１０Ｂとの境目は他の部分より細く形成されている。
また、本体部１１０Ａと折り返し部１１０Ｂとには、折り返し部１１０Ｂを本体部１１０Ａに向かって折り返した際に重なり合う部分に、ネジ孔１４０となる開口部１１０ａ、１１０ｂがそれぞれ開設されている。
なお、前記金属層は、スパッタリング法、電子ビーム法、蒸着法等で形成することが可能である。 The conductive film strip 110 is formed, for example, by forming a metal layer made of a conductive metal as the conductive layer 112 on one surface of an insulating film 111 made of PET resin. As shown in FIG. 3, the conductive film strip 110 has a strip-shaped main body portion 110A and folded portions 110B formed at both ends of the main body portion 110A. Since the notch 110C is formed from both sides of the boundary between the main body 110A and the folded portion 110B so as to facilitate folding, the boundary between the main body 110A and the folded portion 110B is formed narrower than the other portions. Has been.
In addition, openings 110a and 110b serving as screw holes 140 are formed in the main body portion 110A and the folded portion 110B, respectively, at portions that overlap when the folded portion 110B is folded back toward the main body portion 110A.
The metal layer can be formed by a sputtering method, an electron beam method, a vapor deposition method, or the like.

かかる導電フィルム帯１１０は、両端の折り返し部１１０Ｂを折り返した状態でアースストラップ１００となるが、折り返す前に導電層１１２が設けられていない面に両面接着テープ１２０が本体部１１０Ａの両端に取り付けられる（図３（Ｂ）参照）。
この両面接着テープ１２０は、導電フィルム帯１１０の両端の折り返し部１１０Ｂを導電層１１２を外側にして折り返した際に、折り返された折り返し部１１０Ｂを折り返した状態に維持するためのものである。 The conductive film strip 110 becomes the ground strap 100 in a state in which the folded portions 110B at both ends are folded, but the double-sided adhesive tape 120 is attached to both ends of the main body portion 110A on the surface where the conductive layer 112 is not provided before folding. (See FIG. 3B).
The double-sided adhesive tape 120 is used to keep the folded portion 110B folded when the folded portions 110B at both ends of the conductive film strip 110 are folded with the conductive layer 112 facing outward.

この両面接着テープ１２０は、一端がやや丸く形成され、幅寸法は導電フィルム帯１１０の本体部１１０Ａと同等に設定されている。ただし、この両面接着テープ１２０の長さ寸法は、折り返し部１１０Ｂの長さ寸法より短く設定されている。
従って、両面接着テープ１２０を導電フィルム帯１１０の導電層１１２が形成されていない側に取り付けて、折り返し部１１０Ｂを折り返しても、両面接着テープ１２０の端部１２１（図１において破線で示されている、図４等参照）は、折り返し部１１０Ｂの内側端部１１１ｂより折り返し端面１５０側に位置することになる。
なお、この両面接着テープ１２０にも、前記開口部１１０ａに対応した位置に開口部１２０ａが開設されている。 This double-sided adhesive tape 120 is formed so that one end is slightly rounded, and the width dimension is set to be equal to that of the main body 110 </ b> A of the conductive film strip 110. However, the length dimension of the double-sided adhesive tape 120 is set shorter than the length dimension of the folded portion 110B.
Therefore, even if the double-sided adhesive tape 120 is attached to the side of the conductive film strip 110 where the conductive layer 112 is not formed and the folded portion 110B is folded, the end 121 of the double-sided adhesive tape 120 (shown by a broken line in FIG. 1). 4 and the like) are located closer to the folded end surface 150 than the inner end 111b of the folded portion 110B.
The double-sided adhesive tape 120 also has an opening 120a at a position corresponding to the opening 110a.

前記保護フィルム帯１３０Ａ、１３０Ｂは、例えば、ＰＥＴ樹脂からなる絶縁性フィルム１３１Ａ、１３１Ｂの一面に粘着剤を塗布した粘着層１３２Ａ、１３２Ｂを形成したものである。この保護フィルム帯１３０Ａ、１３０Ｂは、導電フィルム帯１１０より若干幅広の帯状に形成されている。また、この保護フィルム帯１３０Ａ、１３０Ｂの長さ寸法は、折り返し部１１０Ｂを折り返した状態の導電フィルム帯１１０をカバーすると、折り返された折り返し部１１０Ｂの開口部１１０ｂをカバーせず、かつ折り返された折り返し部１１０Ｂの対抗する内側端部１１１ｂ（図１において破線で示している）の間の距離より長く設定されている。 The protective film bands 130A and 130B are formed, for example, by forming adhesive layers 132A and 132B in which an adhesive is applied to one surface of insulating films 131A and 131B made of PET resin. The protective film bands 130A and 130B are formed in a band shape slightly wider than the conductive film band 110. Further, the length dimensions of the protective film strips 130A and 130B are such that when the conductive film strip 110 in the folded state of the folded portion 110B is covered, the opening portion 110b of the folded folded portion 110B is not covered and folded. It is set to be longer than the distance between the inner end portions 111b (shown by broken lines in FIG. 1) that the folded portion 110B faces.

前記ネジ孔１４０は、このアースストラップ１００を電子機器の金属フレームとプリント基板とのようにグランディングが必要な部材の間を導通させる際に、ネジ（図示省略）が貫通される部分である。なお、上述したように、このネジ孔１４０は、導電フィルム帯１１０の本体部１１０Ａの開口部１１０ａと、導電フィルム帯１１０の折り返し部１１０Ｂの開口部１１０ｂと、両面接着テープ１２０の開口部１２０ａとが重なって構成されたものである。   The screw hole 140 is a portion through which a screw (not shown) passes when the ground strap 100 is electrically connected between members that require grounding, such as a metal frame of an electronic device and a printed board. As described above, the screw hole 140 includes the opening 110a of the main body 110A of the conductive film strip 110, the opening 110b of the folded portion 110B of the conductive film strip 110, and the opening 120a of the double-sided adhesive tape 120. Is constructed by overlapping.

このネジ孔１４０は、当該ネジ孔１４０を貫通するネジのワッシャー５００（図６において破線で示している）の縁部が、導電フィルム帯１１０を折り返す際の折り返し端面１５０より内側になる位置に開設されている。
前記ワッシャー５００の縁部が、導電フィルム帯１１０の折り返し端面１５０に重なると、折り返し端面１５０に位置する導電層１１２が、ネジの取り付けの際に部分的又は全体的に破断することがある。導電層１１２か部分的又は全体的に破断すると、抵抗値が大幅に増大するか又は不導通になり、グランディングが不完全になる。 The screw hole 140 is opened at a position where an edge portion of a screw washer 500 (shown by a broken line in FIG. 6) passing through the screw hole 140 is located inside the folded end surface 150 when the conductive film strip 110 is folded. Has been.
When the edge of the washer 500 overlaps the folded end surface 150 of the conductive film strip 110, the conductive layer 112 positioned on the folded end surface 150 may be partially or wholly broken when the screw is attached. If the conductive layer 112 is partially or wholly broken, the resistance value increases significantly or becomes non-conductive, resulting in incomplete grounding.

このような構成部材からなるアースストラップ１００は、以下のようにして組み立てられる。
まず、図３（Ａ）に示す状態、すなわち、導電フィルム帯１１０の折り返し部１１０Ｂが折り返されていない状態の時に、本体部１１０Ａの両端部に開口部１１０ａ、１２０ａが重なるようにして両面接着テープ１２０を貼付する（図３（Ｂ）参照）。ただし、この両面接着テープ１２０は、導電層１１２が形成されていない側である絶縁性フィルム１１１側に貼付される。 The ground strap 100 made of such components is assembled as follows.
First, in the state shown in FIG. 3A, that is, when the folded portion 110B of the conductive film strip 110 is not folded, the double-sided adhesive tape is formed so that the openings 110a and 120a overlap the both ends of the main body 110A. 120 is attached (see FIG. 3B). However, this double-sided adhesive tape 120 is affixed to the insulating film 111 side, which is the side where the conductive layer 112 is not formed.

そして、折り返し部１１０Ｂを導電層１１２が外側になるようにして折り返し、導電フィルム帯１１０の内側に位置する絶縁性フィルム１１１同士を両面接着テープ１２０によって密着させた状態で、折り返し部１１０Ｂを折り返した状態に維持する（図４参照）。   Then, the folded portion 110B was folded so that the conductive layer 112 was on the outside, and the folded portion 110B was folded in a state where the insulating films 111 positioned inside the conductive film strip 110 were adhered to each other with the double-sided adhesive tape 120. The state is maintained (see FIG. 4).

次に、この折り返し部１１０Ｂが折り返された状態の導電フィルム帯１１０を表裏両面から保護フィルム帯１３０Ａ、１３０Ｂでカバーする。保護フィルム帯１３０Ａ、１３０Ｂの粘着層１３１Ａ、１３１Ｂを導電フィルム帯１１０側に向けて、導電フィルム帯１１０を２枚の保護フィルム帯１３０Ａ、１３０Ｂでサンドイッチするのである（図５参照）。   Next, the conductive film strip 110 with the folded portion 110B folded back is covered with the protective film strips 130A and 130B from both the front and back surfaces. The adhesive layers 131A and 131B of the protective film bands 130A and 130B are directed toward the conductive film band 110, and the conductive film band 110 is sandwiched between the two protective film bands 130A and 130B (see FIG. 5).

ここで、保護フィルム帯１３０Ａ、１３０Ｂの幅寸法は、導電フィルム帯１１０の幅寸法より若干大きく設定されているため、導電フィルム帯１１０の両サイドで保護フィルム帯１３０Ａ、１３０Ｂ同士が密着状態で接着される（図１及び図２参照）。
また、保護フィルム帯１３０Ａ、１３０Ｂの長さ寸法は、折り返し部１１０Ｂが折り返された導電フィルム帯１１０をカバーすると、折り返された折り返し部１１０Ｂの開口部１１０ｂをカバーせず、かつ折り返された折り返し部１１０Ｂの対抗する内側端部１１１ｂの間の距離より長く設定されている。このため、保護フィルム帯１３０Ａ、１３０Ｂで導電フィルム帯１１０をカバーしても折り返し部１１０Ｂの開口部１１０ｂ、すなわちネジ孔１４０は閉塞することがなく、かつ折り返された折り返し部１１０Ｂの内側端部１１１ｂは確実にカバーすることになる。 Here, since the width dimensions of the protective film bands 130A and 130B are set slightly larger than the width dimension of the conductive film band 110, the protective film bands 130A and 130B are adhered to each other on both sides of the conductive film band 110. (See FIGS. 1 and 2).
Further, the length dimensions of the protective film bands 130A and 130B are such that when the folded-back portion 110B covers the folded conductive film band 110, the folded-back portion that does not cover the opening 110b of the folded-back portion 110B. It is set longer than the distance between the opposite inner ends 111b of 110B. Therefore, even if the conductive film strip 110 is covered with the protective film strips 130A and 130B, the opening 110b of the folded portion 110B, that is, the screw hole 140 is not blocked, and the inner end portion 111b of the folded portion 110B is folded. Will surely cover.

しかも、両面接着テープ１２０の端部１２１は、導電フィルム帯１１０の折り返し部１１０Ｂの内側端部１１１ｂより内側に位置しているため、保護フィルム帯１３０Ａ、１３０Ｂでカバーする際に、折り返し部１１０Ｂの内側端部１１１ｂは、両面接着テープ１２０の厚さ寸法相当分だけ落ち込むことになる（図５参照）。   Moreover, since the end 121 of the double-sided adhesive tape 120 is located on the inner side of the inner end 111b of the folded portion 110B of the conductive film strip 110, when covering with the protective film strips 130A, 130B, The inner end 111b falls down by an amount corresponding to the thickness dimension of the double-sided adhesive tape 120 (see FIG. 5).

例えば、導電フィルム帯１１０の折り返し部１１０Ｂの内側端部１１１ｂを、両面接着テープ１２０の端部１２１と一致させると、その部分に応力が集中することになる。
また、このアースストラップ１００は極めて薄いため、外観と触覚において段差が非常に目立ってしまう。
しかし、両面接着テープ１２０の端部１２１は、導電フィルム帯１１０の折り返し部１１０Ｂの内側端部１１１ｂより内側に位置していると、応力の集中や目立つ段差を軽減することが可能になる。 For example, when the inner end portion 111b of the folded portion 110B of the conductive film strip 110 is made to coincide with the end portion 121 of the double-sided adhesive tape 120, stress is concentrated on that portion.
In addition, since the ground strap 100 is extremely thin, a step is very conspicuous in appearance and touch.
However, if the end portion 121 of the double-sided adhesive tape 120 is positioned inside the inner end portion 111b of the folded portion 110B of the conductive film strip 110, it is possible to reduce stress concentration and conspicuous steps.

一方、当該ネジ孔１４０を貫通するネジのワッシャー５００の縁部が、導電フィルム帯１１０を折り返す際の折り返し端面１５０より内側になるようにネジ孔１４０が開設されていると、ワッシャー５００の縁部による導電フィルム帯１１０の折り返し端面１５０の導電層１１２の部分的又は全体的な破断が生じないため、グランディングが不完全にならない。
例えば、厚さ寸法が１６．５μｍの導電フィルム帯１１０を用いたアースストラップ１００の場合、ワッシャー５００の縁部と、折り返し端面１５０との間が１ｍｍであった場合には抵抗値は約６９％増加し、２ｍｍであった場合には抵抗値は７％の増加ですむことが実験によって確認できた。 On the other hand, if the screw hole 140 is opened so that the edge of the screw washer 500 penetrating the screw hole 140 is located inside the folded end surface 150 when the conductive film strip 110 is folded, the edge of the washer 500 is formed. Since the conductive layer 112 on the folded end face 150 of the conductive film strip 110 is not partially or totally broken, the grounding does not become incomplete.
For example, in the case of the ground strap 100 using the conductive film strip 110 having a thickness of 16.5 μm, when the distance between the edge of the washer 500 and the folded end surface 150 is 1 mm, the resistance value is about 69%. It has been confirmed by experiment that the resistance value can be increased by 7% when it is increased to 2 mm.

１００ アースストラップ
１１０ 導電フィルム帯
１１１ 絶縁性フィルム
１１１ｂ 内側端部
１１２ 導電層
１２０ 両面接着テープ
１２１ （両面接着テープの）端部
１３０Ａ、１３０Ｂ 保護フィルム帯 DESCRIPTION OF SYMBOLS 100 Ground strap 110 Conductive film band 111 Insulating film 111b Inner edge part 112 Conductive layer 120 Double-sided adhesive tape 121 End part (A double-sided adhesive tape) 130A, 130B Protective film band

Claims (3)

絶縁性フィルムの一面に導電性を有する導電層が形成された導電フィルム帯と、この導電フィルム帯の両端を導電層を外側にして折り返す際に、内側に位置する絶縁性フィルム同士を密着させる両面接着テープと、両端が折り返された導電フィルム帯の表裏両面をカバーする絶縁性を有する保護フィルム帯とを具備しており、前記両面接着テープの端部は、導電フィルム帯の内側端部より折り返し端面側に位置し、前記保護フィルム帯は、絶縁性フィルム帯の折り返された両端の外側一部をカバーしていないことを特徴とするアースストラップ。 A conductive film band in which a conductive layer having conductivity is formed on one side of the insulating film, and both surfaces for bringing the insulating films located on the inside into close contact when folding both ends of the conductive film band with the conductive layer facing outward An adhesive tape, and an insulating protective film band covering both front and back surfaces of the conductive film band folded at both ends, and an end of the double-sided adhesive tape is folded back from an inner end of the conductive film band An earth strap, which is located on an end face side, and wherein the protective film strip does not cover a part of the outer side of the folded back end of the insulating film strip. 前記保護フィルムでカバーされていない導電フィルム帯の外側一部にはネジ孔が開設されていることを特徴とする請求項１記載のアースストラップ。   The ground strap according to claim 1, wherein a screw hole is formed in a part of the outer side of the conductive film strip not covered with the protective film. 前記ネジ孔は、当該ネジ孔を貫通するネジのワッシャーの端面が、導電フィルム帯を折り返す際の折り返し端面より内側になる位置に開設されていることを特徴とする請求項２記載のアースストラップ。   3. The ground strap according to claim 2, wherein the screw hole is formed at a position where an end face of a screw washer penetrating the screw hole is located inside a folded end face when the conductive film strip is folded.
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