JP2004022274A

JP2004022274A - Electric board

Info

Publication number: JP2004022274A
Application number: JP2002173947A
Authority: JP
Inventors: Kazumasa Sakata; 坂田　和正; Takahiro Imai; 今井　高広; Kenji Enomoto; 榎本　憲嗣
Original assignee: Furukawa Electric Co Ltd
Current assignee: Furukawa Electric Co Ltd
Priority date: 2002-06-14
Filing date: 2002-06-14
Publication date: 2004-01-22

Abstract

<P>PROBLEM TO BE SOLVED: To provide a terminal connection structure of a bus bar resolving a reduction in the degree of flexibility in design in a tab bending structure or an increase in man-hours in a tab welding structure for bus bars, thereby reducing production cost. <P>SOLUTION: To a rolled copper plate having a through-hole, a separate tab having a press fit pin is inserted to form an electric board of a bus bar or the like. In the case of stacking the rolled copper plate and an insulation material, the press fit pin is fitted to both the rolled copper plate and the insulation material to secure the electric connection and mechanical attachment strength. <P>COPYRIGHT: (C)2004,JPO

Description

【０００１】
【発明の属する技術分野】
本発明は、圧延銅板で電気回路を形成したバスバー等の電気基板に関する。特に、前記バスバー等における圧延銅板とタブ等の端子の接続構造に関する。
【０００２】
【従来の技術】
従来、自動車用ジャンクションボックス等における電源分配のためのバスバーは、特開２０００−２０１４１８号公報に開示されるようにプレスにより圧延銅板をバスバーの展開形状に打抜いた後、一部を折り起してタブ等の端子を形成していた。また、他の方法としては、特開平１１−２５０９４５号公報に開示されるようにプレスにより圧延銅板をバスバーの平板部の形状に打抜いた後、別体のタブ等の端子部材を溶接や半田付けなどで接続、固定してバスバーを形成していた。
【０００３】
【発明が解決しようとする課題】
しかし、従来の打抜いた展開形状のバスバーの一部を折り起してタブ等の端子を形成する構成によると、展開した端子部が干渉するためタブ等の端子部をあまり接近して配置できず、設計の自由度が低かった。
【０００４】
また、バスバーの平板部の形状に打抜いた圧延銅板に別体のタブ等の端子部材を溶接や半田付けなどで接続、固定する構成によれば、設計の自由度は上がるものの、溶接、半田付けに相当の工数を要し、製造コストの低下を図れなかった。
【０００５】
そこで本発明の目的は、製造コストを低減させた、例えば自動車用ジャンクションボックス等における電源分配のためのバスバーの端子接続構造を提供することである。
【０００６】
【課題を解決するための手段】
上記目的を達成するため、請求項１に係る電気基板は、電気回路を形成した圧延銅板と、該圧延銅板に形成されたタブを備える電気基板において、圧延銅板に貫通穴を設け、端子部とプレスフィットピンを有する別体のタブのプレスフィットピンを前記貫通穴に圧入してタブを形成したことを特徴とする。
【０００７】
請求項２に係る電気基板は、請求項１に記載の特徴に加え、圧延銅板が絶縁部材上に積層されており、プレスフィットピンが圧延銅板及び絶縁部材の双方に嵌合されることを特徴とする。
【０００８】
請求項３に係る電気基板は、請求項２に記載の特徴に加え圧延銅板における貫通穴の径と、絶縁部材における貫通穴の径が異なることを特徴とする。
【０００９】
請求項４に記載の電気基板は、請求項２又は請求項３に記載の特徴に加え、プレスフィットピンが、圧延銅板に嵌合される部分の径と、絶縁部材に嵌合される部分の径が異なる段付であることを特徴とする。
【００１０】
【作用】
請求項１に係る構成によれば、圧延銅板を打抜く際に基板の平板部の形状のみを打抜けばよいため、設計の自由度が向上するとともに、端子部材をプレスフィットピンにより貫通穴に圧入するため、溶接や半田付けのための工数が嵩むこともなく電気基板の製造コストの低減が図れる。
【００１１】
また、圧延銅板にプレスフィットピンを挿入するため機械的な取付強度を十分確保でき、車載用の電源分配バスバー等にも使用できる。
【００１２】
請求項２に係る構成によれば、プレスフィットピンが圧延銅板のみならず絶縁部材にも嵌合するため、より高い取付強度を確保できる。また、圧延銅板の厚さが十分である場合には、プレスフィットピンと圧延銅板の接触面積が十分確保されるため、貫通穴の内面にメッキ加工を施す必要がなくなり、製造コストを低減できる。
【００１３】
請求項３に係る構成によれば、プレスフィットピンと圧延銅板、及びプレスフィットピンと絶縁部材のはめあいをそれぞれ独立に設定できる。例えば、機械的な取付強度を高くしたい場合には、貫通穴の径を小径にし、プレスフィットピンとのはめあいを硬くすれば良いが、圧延銅板が薄い場合にはプレスフィットピン挿入時に圧延銅板を破損する畏れがある。そこで貫通穴の径を圧延銅板においてはやや大径とし、はめあいを弛目に設定し、絶縁部材においては小径としはめあいを固目に設定すれば、十分な機械的取付強度を確保しつつ、圧延銅板が破損するのを防ぐことができる。また、例えば電気的接触抵抗を下げたいがプレスフィットピンの挿入工程において挿入力を抑えたい場合には、貫通穴の径を圧延銅板において小径にし、絶縁部材においてやや大径とすることで実現できる。
【００１４】
請求項４に係る構成によれば、プレスフィットピンを段付とし径を変えることにより圧延銅板部と絶縁部材部のはめあいを設定するため、基板に貫通穴を設ける工程において、２段階の穴明け加工を要することなくプレスフィットピンと圧延銅板、及びプレスフィットピンと絶縁部材のはめあいをそれぞれ独立に設定できる。
【００１５】
貫通穴及びプレスフィットピンの双方の径を圧延銅板部及び絶縁部材部で変えることにより、はめあいに加え接触面積を圧延銅板部及び絶縁部材部でそれぞれ独立に設定できるため、挿入、挿抜力を含めた機械的取付強度と電気的接続の双方を最適に設定できる。
【００１６】
【発明の実施の形態】
以下、本発明の実施の形態を添付図面によって説明する。
【００１７】
図１は本発明に係る電気基板の一実施の形態を示す斜視図である。図１において１は電気基板であり、回路パターンを打抜いた圧延銅板１０１及びタブ２を備えている。圧延銅板１０１には、図２に示すようにタブ２の取付箇所に貫通穴１０２が設けられタブ２を貫通穴１０２に挿入して電気基板１を構成している。タブ２は、図３に示すように端子部２０１とプレスフィットピン２０２よりなっており、プレスフィットピン２０２は図３、図４（プレスフィットピン２０２のＡ−Ａ断面図）に示すようにその中央に中空部２０３が設けてある。プレスフィットピン２０２は前記貫通穴１０２の径より大きい外形寸法ａを有している。前記貫通穴１０２に挿入される際には、貫通穴１０２の内面にプレスフィットピン２０２が押圧され中空部２０３を逃がし部として外形寸法ａが縮小側に弾性変形して挿入される。挿入後にはプレスフィットピン２０２のばね性により外形寸法ａが拡大側に付勢されて貫通穴１０２の内面に押圧される。こうして、圧延銅板１０１とタブ２は電気的及び機械的に接続される。
【００１８】
なお、本実施の形態において、プレスフィットピン２０２の外形寸法ａを一定とし、圧延銅板１０１の貫通穴１０２の径を小さくして圧延銅板１０１とプレスフィットピン２０２の保持力を高めていった場合でも圧延銅板１０１の厚さによって保持力に限界があることが発明者等の鋭意検討により判明している。即ち、貫通穴径とプレスフィットピンの保持力の関係は図１５に示すようになる。ここで図１５は貫通穴径とプレスフィットピンの保持力を示す図であり、図中横軸は貫通穴径で右側が大径側であり、縦軸は保持力で上側が高保持力側、曲線４０１は圧延銅板厚さが０．５ｍｍの場合であり、曲線４０２は圧延銅板厚さが０．２ｍｍ、曲線４０３は圧延銅板厚さが０．１ｍｍの場合である。また破線４０４は保持力３０Ｎを表す。従って、保持力３０Ｎを確保するためには圧延銅板圧延銅板１０１の厚さを０．２ｍｍ以上とすることが望ましい。
【００１９】
図５は本発明に係る電気基板の他の実施の形態である。図５において３は絶縁部材であり、圧延銅板１０１と積層されている。図５においては、タブ２のプレスフィットピン２０２が圧延銅板１０１における貫通穴１０２及び絶縁部材３における貫通穴３０１の双方に嵌合されており、絶縁部材３の貫通穴３０１とプレスフィットピン２０２の嵌合により機械的取付強度が向上されている。
【００２０】
図６に示す他の実施の形態においては、絶縁部材３における貫通穴３０１の径が圧延銅板１０１における貫通穴１０２の径より若干小さく形成されており、絶縁部材３とプレスフィットピン２０２が強固に取り付けられるとともに、圧延銅板１０１がプレスフィットピン２０２を挿入することにより破損するのを防止している。
【００２１】
図７に示す実施の形態においては、上記図６の実施の形態とは反対に圧延銅板１０１における貫通穴１０２の径を絶縁部材３における貫通穴３０１の径より若干小さく形成し、圧延銅板１０１とプレスフィットピン２０２の確実な電気的接触を確保するとともに、プレスフィットピン２０２の挿入力が小さくて済むようになっている。
【００２２】
図８に示す実施の形態では、プレスフィットピン２０２に段部２０６を設けて大形部２０４と小形部２０５を形成している。また、圧延銅板１０１における貫通穴１０２及び絶縁部材３における貫通穴３０１は同径に形成されている。プレスフィットピン２０２を貫通穴１０２、３０１に挿入すると、大形部２０４が圧延銅板１０１の貫通穴１０２に嵌合し、小形部２０５が絶縁部材３の貫通穴３０１に嵌合することにより確実な電気的接触を確保するとともに、プレスフィットピン２０２の挿入力が小さくて済むようになっている。
【００２３】
図９に示す実施の形態では、プレスフィットピン２０２に段部２０６を設けて大形部２０４と小形部２０５を形成している。また、圧延銅板１０１における貫通穴１０２及び絶縁部材３における貫通穴３０１は同径に形成されている。プレスフィットピン２０２を貫通穴１０２、３０１に挿入すると、大形部２０４が絶縁部材３の貫通穴３０１に嵌合し、小形部２０５が圧延銅板１０１の貫通穴１０２に嵌合することにより強固な取付強度を持たせるとともに、圧延銅板１０１がプレスフィットピン２０２を挿入することにより破損するのを防止している。
【００２４】
図１０に示す実施の形態では、プレスフィットピン２０２に段部２０６を設けて大形部２０４と小形部２０５を形成している。また、圧延銅板１０１における貫通穴１０２の径は大形部２０４の外形寸法に対応し、絶縁部材３における貫通穴３０１は小形部２０５の外形寸法に対応している。そして、圧延銅板１０１の貫通穴１０２と大形部２０４のはめあいと、絶縁部材３の貫通穴３０１と小形部２０５のはめあいを独立に設定するとともに、大形部２０４と小形部２０５の寸法を機械的取付強度、電気的接続に必要な接触面積を有する寸法に設定することにより、取付の最適化が図れる。
【００２５】
図１１はプレスフィットピン２０２の他の実施の形態を示したものであり、中空部を有せず、断面を略Ｍ型として（図１２　Ｂ−Ｂ断面図参照）断面形状を弾性変形させるものであってもよい。
【００２６】
さらに、他の実施の形態としてタブ２の端子部２０１とプレスフィットピン２０２の境界位置に図１３に示すように端子凸部２０７を設けた場合には、端子凸部２０７がプレスフィットピン２０２の挿入深さを規制するため安定した挿入が可能であるとともに、外力によってタブ２が傾くのを防止することができる。この際にプレスフィットピンの形状は図８から図１０に示す段付でもよいし、図１１、図１２に示す断面Ｍ型であってもよい。
【００２７】
また、図１４に示すようにタブ２はプレスフィットピン２０２を複数備えるものであっても良い。
【００２８】
【発明の効果】
本発明は、以上説明した通り、製造コストを低減させたバスバーの端子接続構造を提供することができる。
【図面の簡単な説明】
【図１】本発明に係る電気基板の一実施の形態を示す斜視図。
【図２】本発明に係る電気基板を構成する圧延銅板の一実施の形態を示す斜視図。
【図３】本発明に係る電気基板を構成するタブの一実施の形態を示す側面図。
【図４】本発明に係る電気基板を構成するタブのプレスフィットピン部の断面図（図３におけるＡ−Ａ断面図）。
【図５】本発明に係る電気基板のプレスフィットピン挿入状態の一実施の形態を示す断面図。
【図６】本発明に係る電気基板のプレスフィットピン挿入状態の一実施の形態を示す断面図。
【図７】本発明に係る電気基板のプレスフィットピン挿入状態の一実施の形態を示す断面図。
【図８】本発明に係る電気基板のプレスフィットピン挿入状態の一実施の形態を示す断面図。
【図９】本発明に係る電気基板のプレスフィットピン挿入状態の一実施の形態を示す断面図。
【図１０】本発明に係る電気基板のプレスフィットピン挿入状態の一実施の形態を示す断面図。
【図１１】本発明に係る電気基板を構成するタブの一実施の形態を示す側面　図。
【図１２】本発明に係る電気基板を構成するタブのプレスフィットピン部の断面図（図１１におけるＢ−Ｂ断面図）
【図１３】本発明に係る電気基板のプレスフィットピン挿入状態の一実施の形態を示す断面図。
【図１４】本発明に係る電気基板を構成するタブの一実施の形態を示す側面図。
【図１５】貫通穴の径とプレスフィットピンの保持力の関係を示す図。
【符号の説明】
１　　　　電気基板
１０１　　圧延銅板
１０２　　圧延銅板における貫通穴
２　　　　タブ
２０１　　端子部
２０２　　プレスフィットピン
２０３　　中空部
２０４　　大形部
２０５　　小形部
２０６　　段部
２０７　　端子凸部
ａ　　　　プレスフィットピンの外形寸法
３　　　　絶縁部材
３０１　　絶縁部材における貫通穴
４０１　　圧延銅板厚さが０．５ｍｍの場合の保持力を示す曲線
４０２　　圧延銅板厚さが０．２ｍｍの場合の保持力を示す曲線
４０３　　圧延銅板厚さが０．１ｍｍの場合の保持力を示す曲線
４０４　　保持力３０Ｎを示す破線[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an electric board such as a bus bar in which an electric circuit is formed by a rolled copper plate. In particular, the present invention relates to a connection structure between a rolled copper plate and a terminal such as a tab in the bus bar or the like.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, a bus bar for distributing power in a junction box for automobiles or the like is formed by punching a rolled copper plate into an expanded shape of a bus bar by a press as described in Japanese Patent Application Laid-Open No. 2000-201418 and then turning up a part. To form terminals such as tabs. Further, as another method, as disclosed in Japanese Patent Application Laid-Open No. H11-250945, a rolled copper plate is punched into a shape of a flat portion of a bus bar by a press, and then a terminal member such as a separate tab is welded or soldered. The busbar was formed by connecting and fixing by attaching.
[0003]
[Problems to be solved by the invention]
However, according to the conventional configuration of forming a terminal such as a tab by bending a part of a bus bar of a punched and unfolded shape, the unfolded terminal interferes with the terminal portion such as a tab. Design flexibility was low.
[0004]
In addition, according to a configuration in which a terminal member such as a separate tab is connected and fixed to a rolled copper plate punched into the shape of a flat portion of a bus bar by welding or soldering, the degree of freedom in design increases, but welding and soldering are performed. A considerable amount of man-hours were required for mounting, and the manufacturing cost could not be reduced.
[0005]
SUMMARY OF THE INVENTION An object of the present invention is to provide a bus bar terminal connection structure for power distribution in, for example, a junction box for an automobile, which has a reduced manufacturing cost.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, the electric board according to claim 1 is a rolled copper sheet on which an electric circuit is formed, and in an electric board including a tab formed on the rolled copper sheet, a through hole is provided in the rolled copper sheet, and a terminal portion is provided. The tab is formed by pressing a press-fit pin of a separate tab having a press-fit pin into the through hole.
[0007]
The electric board according to claim 2 is characterized in that, in addition to the features described in claim 1, a rolled copper plate is laminated on an insulating member, and press-fit pins are fitted to both the rolled copper plate and the insulating member. And
[0008]
According to a third aspect of the present invention, in addition to the features of the second aspect, the diameter of the through-hole in the rolled copper plate is different from the diameter of the through-hole in the insulating member.
[0009]
The electric board according to claim 4 is the electric board according to claim 2, wherein the press-fit pin has a diameter of a portion fitted to the rolled copper plate and a diameter of a portion fitted to the insulating member. It is characterized by steps having different diameters.
[0010]
[Action]
According to the configuration according to claim 1, when punching a rolled copper plate, only the shape of the flat plate portion of the substrate needs to be punched out, so that the degree of freedom of design is improved and the terminal member is formed into the through hole by the press-fit pin. Since the press-fitting is performed, the manufacturing cost of the electric board can be reduced without increasing the number of steps for welding and soldering.
[0011]
Further, since the press-fit pin is inserted into the rolled copper plate, sufficient mechanical mounting strength can be ensured, and it can also be used as a power distribution busbar for a vehicle.
[0012]
According to the configuration of the second aspect, since the press-fit pin is fitted not only to the rolled copper plate but also to the insulating member, higher mounting strength can be secured. In addition, when the thickness of the rolled copper plate is sufficient, the contact area between the press-fit pin and the rolled copper plate is sufficiently ensured, so that it is not necessary to perform plating on the inner surface of the through hole, and the manufacturing cost can be reduced.
[0013]
According to the configuration of the third aspect, the fit between the press-fit pin and the rolled copper plate and the fit between the press-fit pin and the insulating member can be set independently. For example, if you want to increase the mechanical mounting strength, you can make the diameter of the through hole small and make the fit with the press-fit pin hard, but if the rolled copper plate is thin, the rolled copper plate is damaged when the press-fit pin is inserted. Fear to do. Therefore, if the diameter of the through hole is set slightly larger in the rolled copper sheet, the fit is set to a slack, and the diameter of the insulating member is set to a small diameter, the fitting is set to a fixed diameter, while ensuring sufficient mechanical mounting strength, The copper plate can be prevented from being damaged. Further, for example, when it is desired to reduce the electrical contact resistance but to suppress the insertion force in the press-fit pin insertion process, the diameter of the through hole can be reduced by making the diameter of the rolled copper plate small, and by making the diameter of the insulating member slightly larger. .
[0014]
According to the configuration of claim 4, the press-fit pin is stepped and the diameter is changed to set the fit between the rolled copper plate portion and the insulating member portion. The fit between the press-fit pin and the rolled copper plate and the fit between the press-fit pin and the insulating member can be set independently without any processing.
[0015]
By changing the diameter of both the through hole and the press-fit pin in the rolled copper plate and the insulating member, the contact area can be set independently in the rolled copper plate and the insulating member, in addition to the fit. Both the mechanical mounting strength and the electrical connection can be set optimally.
[0016]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.
[0017]
FIG. 1 is a perspective view showing one embodiment of an electric board according to the present invention. In FIG. 1, reference numeral 1 denotes an electric board, which is provided with a rolled copper plate 101 obtained by stamping a circuit pattern and a tab 2. As shown in FIG. 2, the rolled copper plate 101 is provided with a through hole 102 at a place where the tab 2 is attached, and the tab 2 is inserted into the through hole 102 to constitute the electric board 1. The tab 2 includes a terminal portion 201 and a press-fit pin 202 as shown in FIG. 3, and the press-fit pin 202 is formed as shown in FIG. 3 and FIG. 4 (A-A cross-sectional view of the press-fit pin 202). A hollow portion 203 is provided at the center. The press-fit pin 202 has an outer dimension a larger than the diameter of the through hole 102. When inserted into the through hole 102, the press-fit pin 202 is pressed against the inner surface of the through hole 102, and the outer dimension a is elastically deformed toward the reduced side as the relief portion of the hollow portion 203 and inserted. After the insertion, the outer dimension a is urged toward the enlarged side by the spring property of the press-fit pin 202 and pressed against the inner surface of the through hole 102. Thus, the rolled copper plate 101 and the tub 2 are electrically and mechanically connected.
[0018]
In the present embodiment, when the outer dimension a of the press-fit pin 202 is fixed, the diameter of the through hole 102 of the rolled copper plate 101 is reduced, and the holding force between the rolled copper plate 101 and the press-fit pin 202 is increased. However, it has been found by earnest studies by the inventors that the holding force is limited by the thickness of the rolled copper plate 101. That is, the relationship between the diameter of the through hole and the holding force of the press-fit pin is as shown in FIG. Here, FIG. 15 is a diagram showing the diameter of the through hole and the holding force of the press-fit pin. In the figure, the horizontal axis is the diameter of the through hole and the right side is the large diameter side, and the vertical axis is the holding force and the upper side is the high holding force side. Curve 401 is for a rolled copper plate thickness of 0.5 mm, curve 402 is for a rolled copper plate thickness of 0.2 mm, and curve 403 is for a rolled copper plate thickness of 0.1 mm. A broken line 404 represents the holding force 30N. Therefore, in order to secure a holding force of 30 N, it is desirable that the thickness of the rolled copper plate 101 be 0.2 mm or more.
[0019]
FIG. 5 shows another embodiment of the electric board according to the present invention. In FIG. 5, reference numeral 3 denotes an insulating member, which is laminated on the rolled copper plate 101. In FIG. 5, the press-fit pin 202 of the tab 2 is fitted into both the through-hole 102 in the rolled copper plate 101 and the through-hole 301 in the insulating member 3. The mechanical attachment strength is improved by the fitting.
[0020]
In another embodiment shown in FIG. 6, the diameter of the through hole 301 in the insulating member 3 is formed to be slightly smaller than the diameter of the through hole 102 in the rolled copper plate 101, so that the insulating member 3 and the press-fit pin 202 are firmly connected. While being attached, the rolled copper plate 101 is prevented from being damaged by inserting the press-fit pin 202.
[0021]
In the embodiment shown in FIG. 7, the diameter of the through hole 102 in the rolled copper plate 101 is formed to be slightly smaller than the diameter of the through hole 301 in the insulating member 3, contrary to the embodiment of FIG. In addition to ensuring reliable electrical contact of the press-fit pin 202, the insertion force of the press-fit pin 202 can be reduced.
[0022]
In the embodiment shown in FIG. 8, a step portion 206 is provided on a press-fit pin 202 to form a large portion 204 and a small portion 205. Further, the through hole 102 in the rolled copper plate 101 and the through hole 301 in the insulating member 3 are formed to have the same diameter. When the press-fit pin 202 is inserted into the through-holes 102 and 301, the large-sized portion 204 fits into the through-hole 102 of the rolled copper plate 101, and the small-sized portion 205 fits into the through-hole 301 of the insulating member 3. The electrical contact is ensured, and the insertion force of the press-fit pin 202 is reduced.
[0023]
In the embodiment shown in FIG. 9, a step portion 206 is provided on a press-fit pin 202 to form a large portion 204 and a small portion 205. Further, the through hole 102 in the rolled copper plate 101 and the through hole 301 in the insulating member 3 are formed to have the same diameter. When the press-fit pin 202 is inserted into the through-holes 102 and 301, the large-sized portion 204 fits into the through-hole 301 of the insulating member 3, and the small-sized portion 205 fits into the through-hole 102 of the rolled copper plate 101, thereby providing a strong structure. In addition to providing the mounting strength, the rolled copper plate 101 is prevented from being damaged by inserting the press-fit pin 202.
[0024]
In the embodiment shown in FIG. 10, a step portion 206 is provided on a press-fit pin 202 to form a large portion 204 and a small portion 205. Further, the diameter of the through hole 102 in the rolled copper plate 101 corresponds to the outer size of the large portion 204, and the through hole 301 in the insulating member 3 corresponds to the outer size of the small portion 205. The fitting between the through hole 102 of the rolled copper plate 101 and the large portion 204 and the fitting between the through hole 301 of the insulating member 3 and the small portion 205 are set independently, and the dimensions of the large portion 204 and the small portion 205 are mechanically adjusted. Optimal mounting can be achieved by setting the dimensions to have the required mounting strength and the contact area necessary for electrical connection.
[0025]
FIG. 11 shows another embodiment of the press-fit pin 202. The press-fit pin 202 does not have a hollow portion and has a substantially M-shaped cross section (see the BB cross-sectional view in FIG. 12) to elastically deform the cross-sectional shape. It may be.
[0026]
Further, as another embodiment, when a terminal convex portion 207 is provided at a boundary position between the terminal portion 201 of the tab 2 and the press-fit pin 202 as shown in FIG. Since the insertion depth is regulated, stable insertion is possible, and the tab 2 can be prevented from tilting due to external force. At this time, the shape of the press-fit pin may be stepped as shown in FIGS. 8 to 10 or may be an M-shaped cross section shown in FIGS.
[0027]
Further, as shown in FIG. 14, the tab 2 may include a plurality of press-fit pins 202.
[0028]
【The invention's effect】
As described above, the present invention can provide a bus bar terminal connection structure with reduced manufacturing cost.
[Brief description of the drawings]
FIG. 1 is a perspective view showing an embodiment of an electric board according to the present invention.
FIG. 2 is a perspective view showing one embodiment of a rolled copper plate constituting the electric board according to the present invention.
FIG. 3 is a side view showing one embodiment of a tab constituting the electric board according to the present invention.
FIG. 4 is a cross-sectional view (a cross-sectional view taken along the line AA in FIG. 3) of a press-fit pin portion of a tab constituting the electric board according to the present invention.
FIG. 5 is a cross-sectional view showing an embodiment of a press-fit pin inserted state of the electric board according to the present invention.
FIG. 6 is a cross-sectional view showing one embodiment of a press-fit pin inserted state of the electric board according to the present invention.
FIG. 7 is a cross-sectional view showing one embodiment of a press-fit pin inserted state of the electric board according to the present invention.
FIG. 8 is a cross-sectional view showing one embodiment of a press-fit pin inserted state of the electric board according to the present invention.
FIG. 9 is a cross-sectional view showing an embodiment of a press-fit pin inserted state of the electric board according to the present invention.
FIG. 10 is a sectional view showing an embodiment of a press-fit pin inserted state of the electric board according to the present invention.
FIG. 11 is a side view showing one embodiment of a tab constituting the electric board according to the present invention.
FIG. 12 is a cross-sectional view of a press-fit pin portion of a tab constituting the electric board according to the present invention (a cross-sectional view taken along line BB in FIG. 11).
FIG. 13 is a sectional view showing an embodiment of a press-fit pin inserted state of the electric board according to the present invention.
FIG. 14 is a side view showing one embodiment of a tab constituting the electric board according to the present invention.
FIG. 15 is a diagram showing a relationship between a diameter of a through hole and a holding force of a press-fit pin.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Electric board 101 Rolled copper plate 102 Through-hole in a rolled copper plate 2 Tab 201 Terminal part 202 Press fit pin 203 Hollow part 204 Large part 205 Small part 206 Step part 207 Terminal convex part a External dimensions of press fit pin 3 Insulation member 301 Insulation Curve 402 indicating the holding force when the thickness of the rolled copper sheet is 0.5 mm Curve 403 indicating the holding force when the thickness of the rolled copper sheet is 0.2 mm When the thickness of the rolled copper sheet is 0.1 mm Curve 404 indicating holding force Dashed line indicating holding force 30N

Claims

In a rolled copper plate having an electric circuit formed thereon and an electric board having a tab formed in the rolled copper plate, a through hole is provided in the rolled copper plate, and the press-fit pin of a separate tab having a terminal portion and a press-fit pin is inserted through the roll-through copper plate. An electric board, wherein a tab is formed by press-fitting into a hole.

The electric board according to claim 1, wherein the rolled copper plate is laminated on the insulating member, and the press-fit pin is fitted to both the rolled copper plate and the insulating member.

The electric board according to claim 2, wherein the diameter of the through hole in the rolled copper plate is different from the diameter of the through hole in the insulating member.

4. The electric board according to claim 2, wherein the press-fit pin has a stepped portion in which a diameter of a portion fitted to the rolled copper plate and a diameter of a portion fitted to the insulating member are different. .