JP7338982B2

JP7338982B2 - Connection structure between circuit board and terminal

Info

Publication number: JP7338982B2
Application number: JP2019021854A
Authority: JP
Inventors: 泰嗣 ▲高▼梨; 裕矢岸端; 巧中岸
Original assignee: Yazaki Corp
Current assignee: Yazaki Corp
Priority date: 2019-02-08
Filing date: 2019-02-08
Publication date: 2023-09-05
Anticipated expiration: 2039-02-08
Also published as: JP2020129614A

Description

本発明は、回路基板と、その回路基板に設けられたスルーホールに圧入される端子と、の接続構造、及び、そのような接続構造に用いることができる端子、に関する。 The present invention relates to a connection structure between a circuit board and a terminal press-fitted into a through hole provided in the circuit board, and a terminal that can be used in such a connection structure.

従来から、回路基板に設けられたスルーホールに圧入される端子（以下「プレスフィット端子」という。）を用いた、回路基板と端子との接続構造が提案されている。従来の接続構造の一つに用いられるプレスフィット端子は、スルーホールの孔内面に押圧接触するように幅方向に膨らむ形状を有する圧入部を有している（例えば、特許文献１を参照）。 2. Description of the Related Art Conventionally, there has been proposed a connection structure between a circuit board and terminals using terminals press-fitted into through holes provided in the circuit board (hereinafter referred to as "press-fit terminals"). A press-fit terminal used in one of conventional connection structures has a press-fitting portion that expands in the width direction so as to press-contact the inner surface of a through hole (see, for example, Patent Document 1).

近年、回路基板およびスルーホールの孔内面に設けられる導電性の回路体（例えば、銅製の薄膜）の防食性を高める等の観点から、回路体を覆うように保護膜が設けられる場合がある。この種の保護膜は、一般に、プリフラックス（ＯＳＰ。ＯｒｇａｎｉｃＳｏｌｄｅｒａｂｉｌｉｔｙＰｒｅｓｅｒｖａｔｉｖｅ）とも呼ばれる。このような保護膜を有する回路基板にプレスフィット端子を接続するにあたり、従来のプレスフィット端子の一つの圧入部には、スルーホールの孔内面を覆う保護膜を削って除去する機構が設けられている（例えば、特許文献２を参照）。 In recent years, from the viewpoint of improving the corrosion resistance of the conductive circuit body (for example, copper thin film) provided on the inner surface of the circuit board and the hole of the through hole, a protective film may be provided so as to cover the circuit body. This type of protective film is also generally called preflux (OSP: Organic Solderability Preservative). When connecting a press-fit terminal to a circuit board having such a protective film, one press-fitting portion of a conventional press-fit terminal is provided with a mechanism for scraping and removing the protective film covering the inner surface of the through hole. (See Patent Document 2, for example).

特開２００７－２５０５４９号公報JP 2007-250549 A 特開２０１７－１７４６４２号公報JP 2017-174642 A

ところで、保護膜の除去性能を高めるために圧入部による押圧力を大きくすると、上述した従来のプレスフィット端子の構造上、スルーホールに圧入部を挿入し難くなる場合がある。そして、そのような圧入部を無理にスルーホールに押し込むと、圧入部の座屈や、回路体の損傷などが生じ得る。逆に、圧入部による押圧力を小さくすると、保護膜を十分に除去できず回路体と圧入部との電気的接続が不十分になる場合があり、また、スルーホール内での圧入部の位置が十分に保たれない場合もある。そこで、保護膜を適正に除去して電気的接続の信頼性を高めながら、更に回路基板への保持力に優れるような、プレスフィット端子と回路基板との接続構造が望まれている。 By the way, if the pressing force of the press-fitting portion is increased in order to improve the removal performance of the protective film, it may become difficult to insert the press-fitting portion into the through-hole due to the structure of the conventional press-fit terminal described above. If such a press-fitting portion is forcibly pushed into the through-hole, buckling of the press-fitting portion and damage to the circuit body may occur. Conversely, if the pressing force of the press-fit portion is reduced, the protective film may not be sufficiently removed, resulting in insufficient electrical connection between the circuit body and the press-fit portion. may not be adequately maintained. Therefore, there is a demand for a connection structure between a press-fit terminal and a circuit board, in which the protective film is properly removed to improve the reliability of the electrical connection, and the holding force to the circuit board is excellent.

本発明は、上述した事情に鑑みてなされたものであり、その目的は、回路基板と端子との電気的接続の信頼性と、回路基板への端子の保持性能の向上と、を両立可能な回路基板と端子との接続構造、を提供することにある。 The present invention has been made in view of the circumstances described above, and an object of the present invention is to achieve both the reliability of the electrical connection between the circuit board and the terminal and the improvement of the holding performance of the terminal on the circuit board. To provide a connection structure between a circuit board and a terminal.

前述した目的を達成するために、本発明に係る「回路基板と端子との接続構造」は、下記［１］～［２］を特徴としている。
［１］
回路基板と、前記回路基板に設けられたスルーホールに圧入される端子と、を接続するための、回路基板と端子との接続構造であって、
前記回路基板は、
前記スルーホールの孔内面に位置する回路体と、前記回路体を覆う保護膜と、を有し、
前記端子は、
前記スルーホールへの挿入方向に交差する幅方向の両側に膨出し且つ前記幅方向に弾性変形可能な圧入部と、前記圧入部に対応した位置にある空洞部と、前記回路体に押圧接触するように前記圧入部に設けられる第１接点部と、前記挿入方向における前記第１接点部よりも後方において前記回路体に押圧接触するように前記圧入部に設けられる第２接点部と、を有し、
前記圧入部の一対の頂面は、前記挿入方向に延びる平面であり、
膨出する前記圧入部の前記挿入方向の前側の斜面部と前記頂面との境界部が前記第１接点部を構成し、膨出する前記圧入部の前記挿入方向の後側の斜面部と前記頂面との境界部が前記第２接点部を構成し、
当該接続構造は、
前記圧入部の前記スルーホールへの圧入後において、前記第１接点部及び前記第２接点部の双方が前記スルーホールの孔内に位置し、且つ、前記挿入方向における前記スルーホールの前記孔内面の中央位置から、前記回路基板の厚さの３０％に相当する長さだけ前記挿入方向の前方に離れた位置と、その長さだけ前記挿入方向の後方に離れた位置と、に挟まれる範囲に、前記第１接点部及び前記第２接点部の双方が位置するように、前記圧入部が前記スルーホールに圧入される、ように構成される、
回路基板と端子との接続構造であること。
［２］
上記［１］に記載の接続構造において、
前記圧入部の前記スルーホールへの圧入前において、前記挿入方向における前記スルーホールの長さと、前記挿入方向における前記第１接点部と前記第２接点部との間の長さと、の比が、５：１～７：１である、
回路基板と端子との接続構造であること。 In order to achieve the above object, a ``connection structure between a circuit board and a terminal'' according to the present invention is characterized by the following [1] to [2].
[1]
A connection structure between a circuit board and a terminal for connecting a circuit board and a terminal press-fitted into a through hole provided in the circuit board,
The circuit board is
a circuit body positioned on the inner surface of the through hole; and a protective film covering the circuit body,
The terminal is
A press-fit portion that bulges on both sides in a width direction that intersects the direction of insertion into the through hole and is elastically deformable in the width direction, and a hollow portion that is located at a position corresponding to the press-fit portion, and press-contacts the circuit body. and a second contact portion provided in the press-fitting portion so as to make pressure contact with the circuit body behind the first contact portion in the insertion direction. death,
the pair of top surfaces of the press-fit portion are flat surfaces extending in the insertion direction;
A boundary portion between a slope portion on the front side in the insertion direction of the bulging press-fit portion and the top surface constitutes the first contact portion, and a slope portion on the rear side in the insertion direction of the bulging press-fit portion constitutes the first contact portion. A boundary portion with the top surface constitutes the second contact portion,
The connection structure is
After the press-fitting portion is press-fitted into the through-hole, both the first contact portion and the second contact portion are positioned within the hole of the through-hole, and the hole inner surface of the through-hole in the insertion direction. A range sandwiched between a position separated forward in the insertion direction by a length corresponding to 30% of the thickness of the circuit board from the central position of the circuit board and a position separated rearward in the insertion direction by that length. and the press-fitting portion is press-fitted into the through-hole such that both the first contact portion and the second contact portion are positioned;
It must be a connection structure between the circuit board and the terminal.
[2]
In the connection structure described in [1] above,
Before the press-fit portion is press-fitted into the through-hole, the ratio of the length of the through-hole in the insertion direction to the length between the first contact portion and the second contact portion in the insertion direction is 5:1 to 7:1
It must be a connection structure between the circuit board and the terminal.

上記［１］の構成の回路基板と端子との接続構造によれば、端子の圧入部を回路基板のスルーホールに圧入するとき、圧入部の第１接点部が保護膜を削って除去しながら挿入方向における前方に進む。そして、第１接点部の挿入方向における後方にある第２接点部が、保護膜が除去されて露出した回路体に接触する。更に、第１接点部と第２接点部との双方がスルーホールの孔内に位置する状態で、スルーホールへの端子の圧入が完了する。これにより、第１接点部と第２接点部との双方が回路体に押圧された状態となるため、それらの一方のみが回路体に接触している場合に比べ、過度に圧入部による押圧力を高めなくても、端子を回路基板に適正に保持できる。また、スルーホールに圧入部を挿入しやすくなるため、圧入部の座屈や回路体の損傷なども避けられる。 According to the connection structure between the circuit board and the terminal having the configuration [1] above, when the press-fit portion of the terminal is press-fitted into the through-hole of the circuit board, the first contact portion of the press-fit portion scrapes and removes the protective film. Go forward in the direction of insertion. Then, the second contact portion behind the first contact portion in the insertion direction contacts the circuit body exposed by removing the protective film. Furthermore, the press-fitting of the terminal into the through hole is completed in a state where both the first contact portion and the second contact portion are positioned within the hole of the through hole. As a result, both the first contact portion and the second contact portion are in a state of being pressed against the circuit body. The terminals can be properly retained on the circuit board without increasing the . In addition, since the press-fit portion can be easily inserted into the through-hole, buckling of the press-fit portion and damage to the circuit body can be avoided.

ところで、第１接点部がスルーホールを通り抜けて第２接点部のみが孔内に残る場合、第１接点部と第２接点部との双方が孔内に残る場合に比べ、第２接点部が回路体に押し付けられる力が強くなる。この場合、第２接点箇所がスルーホール内を進行するとき、第２接点部自身の摩耗による摩耗粉が第２接点部と回路体の間に挟まること等に起因し、第２接点箇所と回路体との電気的接続に不具合が生じる可能性がある。これに対し、本構成の接続構造の場合、第１接点部と第２接点部との双方が孔内に位置するため、第２接点部が回路体に過度に大きな押圧力で押し付けられることがない。そのため、上述したような不具合を避けられる。よって、回路体と圧入部との良好な電気的接続を図ることができる。 By the way, when the first contact portion passes through the through-hole and only the second contact portion remains in the hole, the second contact portion is larger than the case where both the first contact portion and the second contact portion remain in the hole. The force pressed against the circuit body becomes stronger. In this case, when the second contact portion advances through the through-hole, abrasion powder due to wear of the second contact portion itself may be caught between the second contact portion and the circuit body. The electrical connection to the body may be compromised. In contrast, in the connection structure of this configuration, both the first contact portion and the second contact portion are positioned within the hole, so the second contact portion may be pressed against the circuit body with an excessively large pressing force. do not have. Therefore, the problems described above can be avoided. Therefore, good electrical connection can be achieved between the circuit body and the press-fit portion.

したがって、本構成の接続構造は、回路基板と端子との電気的接続の信頼性と、回路基板への端子の保持性能の向上と、を両立可能である。 Therefore, the connection structure of this configuration can achieve both the reliability of the electrical connection between the circuit board and the terminal and the improvement of the holding performance of the terminal to the circuit board.

更に、上記［１］の構成の回路基板と端子との接続構造によれば、挿入方向におけるスルーホールの孔内面の中央部の近傍範囲に、第１接点部及び第２接点部の少なくとも一方が位置する。これにより、例えば、端子に大きな外力が及んで仮に端子と回路基板とが相対移動した場合（端子のズレが生じた場合）であっても、第１接点部及び第２接点部の双方がスルーホールの孔外に移動して回路基板と端子との電気的接続に不具合が生じることを避けられる。 Further, according to the connection structure between the circuit board and the terminal having the configuration [ 1 ], at least one of the first contact portion and the second contact portion is located in the vicinity of the central portion of the hole inner surface of the through hole in the insertion direction. To position. As a result, for example, even if a large external force is applied to the terminal and the terminal and the circuit board move relative to each other (when the terminal is misaligned), both the first contact portion and the second contact portion are through. It is possible to avoid a problem in the electrical connection between the circuit board and the terminal caused by moving out of the hole.

なお、上記「近傍範囲」とは、挿入方向におけるスルーホールの孔内面の中央部から、回路基板の厚さの３０％に相当する長さだけ挿入方向の前方に離れた位置と、その長さだけ挿入方向の後方に離れた位置と、に挟まれる範囲を表す。 The above-mentioned "neighboring range" refers to a position forward in the insertion direction away from the center of the hole inner surface of the through hole in the insertion direction by a length corresponding to 30% of the thickness of the circuit board, and that length. It represents the range sandwiched between a position that is separated backward in the insertion direction by a distance.

上記［２］の構成の回路基板と端子との接続構造によれば、挿入方向におけるスルーホールの長さと、挿入方向における第１接点部と第２接点部との間の長さと、の比が、５：１～７：１である。これにより、上述した端子のズレが生じた場合であっても、第１接点部及び第２接点部の双方がスルーホールの孔外に移動することを、より確実に避けられる。 According to the connection structure between the circuit board and the terminal having the configuration [ 2 ] above, the ratio of the length of the through hole in the insertion direction to the length between the first contact portion and the second contact portion in the insertion direction is , 5:1 to 7:1. As a result, even if the above-described terminal misalignment occurs, it is possible to more reliably prevent both the first contact portion and the second contact portion from moving out of the through hole.

本発明によれば、回路基板と端子との電気的接続の信頼性と回路基板への端子の保持性能の向上とを両立可能な、回路基板と端子との接続構造、及び、端子を提供できる。 ADVANTAGE OF THE INVENTION According to this invention, the connection structure of a circuit board and a terminal which can make both the reliability of an electrical connection of a circuit board and a terminal, and the improvement of the holding|maintenance performance of a terminal to a circuit board compatible, and a terminal can be provided. .

以上、本発明について簡潔に説明した。更に、以下に説明される発明を実施するための最良の形態を添付の図面を参照して通読することにより、本発明の詳細は更に明確化されるであろう。 The present invention has been briefly described above. Furthermore, the details of the present invention will be further clarified by reading the best mode for carrying out the invention described below with reference to the accompanying drawings.

図１は、本発明の実施形態に係る回路基板と端子との接続構造に使用される回路基板及び端子を示す斜視図である。FIG. 1 is a perspective view showing a circuit board and terminals used in a circuit board-terminal connection structure according to an embodiment of the present invention. 図２は、回路基板のスルーホールへの端子の挿入が完了する前の段階を示す主要断面図である。FIG. 2 is a main cross-sectional view showing a stage before completion of insertion of terminals into through-holes of a circuit board. 図３は、回路基板のスルーホールへの端子の挿入が完了して本発明の実施形態に係る回路基板と端子との接続構造が得られた状態における図２に対応する図である。FIG. 3 is a view corresponding to FIG. 2 in a state in which insertion of the terminals into the through holes of the circuit board is completed and the connection structure between the circuit board and the terminals according to the embodiment of the present invention is obtained.

＜実施形態＞
以下、図面を参照しながら、本発明の実施形態に係る回路基板と端子との接続構造１（図３参照）について説明する。この接続構造１は、図１に示すように、回路基板１０と、回路基板１０に設けられたスルーホール１２に圧入される端子２０と、の接続構造である。 <Embodiment>
A connection structure 1 (see FIG. 3) between a circuit board and terminals according to an embodiment of the present invention will be described below with reference to the drawings. This connection structure 1 is, as shown in FIG.

以下、説明の便宜上、図１～図３に示すように、「前後方向」、「幅方向」、「上下方向」、「前」、「後」、「上」及び「下」を定義する。「前後方向」、「幅方向」及び「上下方向」は、互いに直交している。上下方向は、端子２０のスルーホール１２への挿入方向と平行であり、「上」及び「下」はそれぞれ、挿入方向（挿入の向き、図２の白矢印を参照）の「後方」及び「前方」と一致している。 Hereinafter, for convenience of explanation, "front-rear direction", "width direction", "vertical direction", "front", "rear", "upper" and "lower" are defined as shown in FIGS. The "front-rear direction", the "width direction" and the "vertical direction" are orthogonal to each other. The vertical direction is parallel to the insertion direction of the terminal 20 into the through-hole 12, and the "up" and "down" are respectively the "rear" and "back" of the insertion direction (the direction of insertion, see the white arrow in FIG. 2). forward".

図１に示す例では、複数本の同形の端子２０が、回路基板１０に実装されることになる基板実装型の直方体状のコネクタ３０に、幅方向に並ぶように、且つ、コネクタ３０の前端面から突出するように設けられている。 In the example shown in FIG. 1, a plurality of terminals 20 of the same shape are aligned in the width direction of a board-mounted rectangular parallelepiped connector 30 to be mounted on the circuit board 10, and the front end of the connector 30 is It is provided so as to protrude from the surface.

図１に示すように、回路基板１０は、矩形平板状の樹脂製の基板母材１１を有する。基板母材１１には、幅方向に並ぶ複数の端子２０に対応して、複数のスルーホール１２（上下方向に貫通する孔）が幅方向に並ぶように形成されている。各スルーホール１２は、本例では、矩形状を有している。 As shown in FIG. 1, the circuit board 10 has a board base material 11 made of resin in the form of a rectangular flat plate. A plurality of through holes 12 (holes penetrating in the vertical direction) are formed in the substrate base material 11 so as to be aligned in the width direction corresponding to the plurality of terminals 20 aligned in the width direction. Each through hole 12 has a rectangular shape in this example.

図２に示すように、回路基板１０には、スルーホール１２の孔内面に位置する（孔内面を覆う）導電性の回路体１３が設けられている。回路体１３は、典型的には、銅（Ｃｕ）製の薄膜で構成される。回路体１３は、回路基板１０の表面に設けられた所定の回路パターン（図示省略）を介して、回路基板１０の表面に搭載されている複数の電子部品（図示省略）又はアースポイント（図示省略）と電気的に接続されている。回路体１３の防食性を高める等の観点から、回路体１３は、保護膜１４（プリフラックス。ＯＳＰ。ＯｒｇａｎｉｃＳｏｌｄｅｒａｂｉｌｉｔｙＰｒｅｓｅｒｖａｔｉｖｅ）で覆われている。 As shown in FIG. 2, the circuit board 10 is provided with a conductive circuit body 13 located on the inner surface of the through hole 12 (covering the inner surface of the hole). The circuit body 13 is typically composed of a copper (Cu) thin film. The circuit body 13 includes a plurality of electronic components (not shown) or ground points (not shown) mounted on the surface of the circuit board 10 via a predetermined circuit pattern (not shown) provided on the surface of the circuit board 10 . ) are electrically connected. From the viewpoint of enhancing corrosion resistance of the circuit body 13, the circuit body 13 is covered with a protective film 14 (preflux, OSP: Organic Solderability Preservative).

図１に示すように、金属製の各端子２０は、コネクタ３０の前端面から前方に延びる基端部２１と、基端部２１の先端部（前端部）から下方に延びる先端部２２と、からなるＬ字状の形状を有している。本例では、端子２０の断面（延在方向に垂直な方向の断面）は、基端部２１及び先端部２２共に矩形状を有している。各端子２０の先端部２２が、回路基板１０の対応するスルーホール１２にそれぞれ圧入されることになる。 As shown in FIG. 1, each metal terminal 20 includes a base end portion 21 extending forward from the front end surface of the connector 30, a tip end portion 22 extending downward from the tip (front end) of the base end portion 21, It has an L-shaped shape consisting of In this example, both the base end portion 21 and the tip end portion 22 of the cross section of the terminal 20 (the cross section in the direction perpendicular to the extending direction) have a rectangular shape. The tip 22 of each terminal 20 is press-fitted into the corresponding through hole 12 of the circuit board 10 .

図２に示すように、端子２０の先端部２２には、幅方向両側に膨出する圧入部２３が形成されている。圧入部２３には、圧入部２３に対応した位置にて、前後方向に貫通し且つ上下方向に延びる空洞部２４が形成されている。空洞部２４の形成により、圧入部２３は、幅方向に弾性変形可能となっている。なお、圧入部２３は、幅方向には膨出しているが、前後方向には膨出していない。 As shown in FIG. 2, a press-fitting portion 23 that protrudes on both sides in the width direction is formed at the tip portion 22 of the terminal 20 . A hollow portion 24 is formed in the press-fitting portion 23 at a position corresponding to the press-fitting portion 23 so as to penetrate in the front-rear direction and extend in the vertical direction. Due to the formation of the hollow portion 24, the press-fitting portion 23 is elastically deformable in the width direction. Note that the press-fit portion 23 bulges in the width direction, but does not bulge in the front-rear direction.

圧入部２３の一対の頂面２５はそれぞれ、上下方向且つ前後方向に延びる平面である。圧入部２３の一対の頂面２５間の幅方向寸法は、スルーホール１２の幅方向寸法より若干大きい。なお、圧入部２３の前後方向寸法は、スルーホール１２の前後方向寸法より若干小さい。 A pair of top surfaces 25 of the press-fit portion 23 are flat surfaces extending in the vertical direction and the front-rear direction. The widthwise dimension between the pair of top surfaces 25 of the press-fit portion 23 is slightly larger than the widthwise dimension of the through hole 12 . The dimension of the press-fit portion 23 in the front-rear direction is slightly smaller than the dimension in the front-rear direction of the through hole 12 .

頂面２５の下側（挿入方向の前方側）の端部（膨出する圧入部２３の下側の斜面部と頂面２５との境界部）が、第１接点部２６を構成し、頂面２５の上側（挿入方向の後方側）の端部（膨出する圧入部２３の上側の斜面部と頂面２５との境界部）が、第２接点部２７を構成する。第１、第２接点部２６，２７共に、前後方向に直線状に延びている。回路基板１０のスルーホール１２の上下方向の長さＬ２（図２参照）と、第１接点部２６と第２接点部２７との間の上下方向の間隔Ｌ１（図２参照）と、の比は、本例では、５：１～７：１である。 The lower (front side in the insertion direction) end portion of the top surface 25 (the boundary portion between the lower slope portion of the bulging press-fit portion 23 and the top surface 25) constitutes a first contact portion 26, The upper (rear side in the insertion direction) end portion of the surface 25 (the boundary portion between the upper slope portion of the bulging press-fitting portion 23 and the top surface 25 ) constitutes the second contact portion 27 . Both the first and second contact portions 26 and 27 extend linearly in the front-rear direction. The ratio of the vertical length L2 (see FIG. 2) of the through hole 12 of the circuit board 10 to the vertical distance L1 (see FIG. 2) between the first contact portion 26 and the second contact portion 27 is between 5:1 and 7:1 in this example.

各端子２０の先端部２２の圧入部２３をスルーホール１２に圧入する際には、複数の端子２０の先端部２２が、回路基板１０の複数のスルーホール１２の上方にそれぞれ位置するように、回路基板１０の上方にコネクタ３０を配置し、コネクタ３０を回路基板１０に向けて下方に近づけていく。この結果、複数の端子２０の圧入部２３が、回路基板１０の複数のスルーホール１２に一度に挿入されていく。 When the press-fitting portion 23 of the tip portion 22 of each terminal 20 is press-fitted into the through hole 12, the tip portions 22 of the plurality of terminals 20 are positioned above the plurality of through holes 12 of the circuit board 10. The connector 30 is arranged above the circuit board 10, and the connector 30 is brought downward toward the circuit board 10. - 特許庁As a result, the press-fit portions 23 of the plurality of terminals 20 are inserted into the plurality of through holes 12 of the circuit board 10 at once.

図２に示すように、端子２０の圧入部２３が、回路基板１０のスルーホール１２に挿入される際、圧入部２３の第１接点部２６が保護膜１４を削り取りながら下方（挿入方向の前方）に進む。そして、図３に示すように、第１接点部２６の上側（挿入方向における後方）にある第２接点部２７が、保護膜１４が削り取られて露出した回路体１３に接触する。そして、第１接点部２６と第２接点部２７との双方がスルーホール１２の孔内に位置する状態で、端子２０の圧入が完了する。これにより、本発明の実施形態に係る回路基板と端子との接続構造１（図３参照）が得られると共に、コネクタ３０の回路基板１０への実装が完了する。この結果、コネクタ３０に設けられた複数の端子２０が、回路基板１０の複数のスルーホール１２を介して、回路基板１０の表面に搭載されている複数の電子部品又はアースポイントと電気的に接続される。 As shown in FIG. 2, when the press-fitting portion 23 of the terminal 20 is inserted into the through hole 12 of the circuit board 10, the first contact portion 26 of the press-fitting portion 23 scrapes off the protective film 14 downward (forward in the insertion direction). ). Then, as shown in FIG. 3, the second contact portion 27 above the first contact portion 26 (rear in the insertion direction) contacts the circuit body 13 exposed by scraping off the protective film 14 . Then, in a state where both the first contact portion 26 and the second contact portion 27 are positioned inside the through hole 12, the press-fitting of the terminal 20 is completed. As a result, the circuit board-terminal connection structure 1 (see FIG. 3) according to the embodiment of the present invention is obtained, and the mounting of the connector 30 on the circuit board 10 is completed. As a result, the plurality of terminals 20 provided on the connector 30 are electrically connected to the plurality of electronic components or ground points mounted on the surface of the circuit board 10 via the plurality of through holes 12 of the circuit board 10. be done.

図３に示すように、接続構造１では、スルーホール１２の孔内面の上下方向中央の近傍範囲Ｌ３に、第１接点部２６及び第２接点部２７の双方が位置している。近傍範囲Ｌ３とは、例えば、スルーホール１２の孔内面の上下方向中央位置から、回路基板１０の厚さ（スルーホール１２の長さＬ２）の３０％に相当する長さだけ下側（挿入方向の前方）に離れた位置と、その長さだけ上側（挿入方向の後方）に離れた位置と、に挟まれる範囲である。 As shown in FIG. 3 , in the connection structure 1 , both the first contact portion 26 and the second contact portion 27 are positioned in the vicinity range L 3 of the vertical center of the hole inner surface of the through hole 12 . The vicinity range L3 is, for example, a length downward (in the insertion direction) corresponding to 30% of the thickness of the circuit board 10 (the length L2 of the through hole 12) from the center position of the hole inner surface of the through hole 12 in the vertical direction. The range is sandwiched between a position away from the body (front of the body) and a position away by the same length upward (rear in the insertion direction).

以上、本発明の実施形態に係る回路基板と端子との接続構造１によれば、端子２０の圧入部２３を回路基板１０のスルーホール１２に圧入するとき、圧入部２３の第１接点部２６が保護膜１４を削り取りながら挿入方向における前方に進む。そして、第１接点部２６の挿入方向における後方にある第２接点部２７が、保護膜１４が削り取られて露出した回路体１３に接触する。そして、第１接点部２６と第２接点部２７との双方がスルーホール１２の孔内に位置する状態で、端子２０の圧入が完了する。第１接点部２６と第２接点部２７との双方が回路体１３に押圧された状態となるため、過度に圧入部２３の押圧力を高めなくても、端子２０を回路基板１０に適正に保持できる。また、スルーホール１２に圧入部２３を挿入しやすくなり、回路体１３の損傷なども避けられる。 As described above, according to the circuit board-terminal connection structure 1 according to the embodiment of the present invention, when the press-fitting portion 23 of the terminal 20 is press-fitted into the through hole 12 of the circuit board 10, the first contact portion 26 of the press-fitting portion 23 advances forward in the insertion direction while scraping off the protective film 14 . Then, the second contact portion 27 behind the first contact portion 26 in the insertion direction comes into contact with the circuit body 13 exposed by scraping off the protective film 14 . Then, in a state where both the first contact portion 26 and the second contact portion 27 are positioned inside the through hole 12, the press-fitting of the terminal 20 is completed. Since both the first contact portion 26 and the second contact portion 27 are pressed against the circuit body 13, the terminal 20 can be properly attached to the circuit board 10 without excessively increasing the pressing force of the press-fitting portion 23. can hold. Also, the press-fit portion 23 can be easily inserted into the through hole 12, and damage to the circuit body 13 can be avoided.

ところで、先行する第１接点部２６がスルーホール１２を通り抜けて第２接点部２７のみが孔内に残る場合、第１接点部２６と第２接点部２７との双方が孔内に残る場合に比べ、第２接点部２７が回路体１３に押し付けられる力が強くなり、第２接点部２７の摩耗による摩耗粉が第２接点部２７と回路体１３の間に挟まること等に起因する電気的接続の不具合が懸念される。本構成の接続構造１の場合、第１接点部２６と第２接点部２７との双方が孔内に位置するため、第２接点部２７が回路体１３に過度に押し付けられることがないため、そのような不具合を避けられる。よって、回路体１３と圧入部２３との確実な電気的接続を図ることができる。 By the way, when the leading first contact portion 26 passes through the through hole 12 and only the second contact portion 27 remains in the hole, when both the first contact portion 26 and the second contact portion 27 remain in the hole, In comparison, the force with which the second contact portion 27 is pressed against the circuit body 13 becomes stronger, and the wear powder due to the abrasion of the second contact portion 27 is caught between the second contact portion 27 and the circuit body 13. There is concern about connection problems. In the case of the connection structure 1 having this configuration, since both the first contact portion 26 and the second contact portion 27 are positioned within the hole, the second contact portion 27 is not excessively pressed against the circuit body 13. avoid such inconveniences. Therefore, reliable electrical connection between the circuit body 13 and the press-fit portion 23 can be achieved.

したがって、本構成の接続構造１は、回路基板１０と端子２０との電気的接続の信頼性と、回路基板１０への端子２０の保持性能の向上と、を両立可能である。 Therefore, the connection structure 1 having this configuration can achieve both the reliability of the electrical connection between the circuit board 10 and the terminals 20 and the improvement in the holding performance of the terminals 20 on the circuit board 10 .

更に、本構成の接続構造１によれば、挿入方向におけるスルーホール１２の孔内面の中央部の近傍範囲Ｌ３（図３参照）に、第１接点部２６及び第２接点部２７の双方が位置する。これにより、例えば、端子２０に大きな外力が及んで仮に端子２０と回路基板１０とが相対移動した場合（端子２０のズレが生じた場合）であっても、第１接点部２６及び第２接点部２７の双方がスルーホール１２の孔外に移動して回路基板１０と端子２０との電気的接続に不具合が生じることを避けられる。 Furthermore, according to the connection structure 1 having this configuration, both the first contact portion 26 and the second contact portion 27 are positioned in the vicinity range L3 (see FIG. 3) of the central portion of the hole inner surface of the through hole 12 in the insertion direction. do. As a result, for example, even if a large external force acts on the terminal 20 and the terminal 20 and the circuit board 10 move relative to each other (when the terminal 20 is displaced), the first contact portion 26 and the second contact It is possible to avoid a problem in electrical connection between the circuit board 10 and the terminal 20 due to both of the portions 27 moving out of the through holes 12 .

更に、本構成の接続構造１によれば、挿入方向におけるスルーホール１２の長さＬ２（図２参照）と、挿入方向における第１接点部２６と第２接点部２７との間の長さＬ１（図２参照）と、の比が、５：１～７：１である。これにより、上述した端子２０のズレが生じた場合であっても、第１接点部２６及び第２接点部２７の双方がスルーホール１２の孔外に移動することを、より確実に避けられる。 Furthermore, according to the connection structure 1 having this configuration, the length L2 (see FIG. 2) of the through hole 12 in the insertion direction and the length L1 between the first contact portion 26 and the second contact portion 27 in the insertion direction (See FIG. 2) and the ratio is 5:1 to 7:1. As a result, even if the terminal 20 is misaligned, it is possible to more reliably prevent both the first contact portion 26 and the second contact portion 27 from moving out of the through hole 12 .

＜他の態様＞
なお、本発明は上記各実施形態に限定されることはなく、本発明の範囲内において種々の変形例を採用できる。例えば、本発明は、上述した実施形態に限定されるものではなく、適宜、変形、改良、等が可能である。その他、上述した実施形態における各構成要素の材質、形状、寸法、数、配置箇所、等は本発明を達成できるものであれば任意であり、限定されない。 <Other aspects>
The present invention is not limited to the above-described embodiments, and various modifications can be adopted within the scope of the present invention. For example, the present invention is not limited to the above-described embodiments, and can be modified, improved, etc. as appropriate. In addition, the material, shape, size, number, location, etc. of each component in the above-described embodiment are arbitrary and not limited as long as the present invention can be achieved.

例えば、上記実施形態では、第１接点部２６及び第２接点部２７の双方が、スルーホール１２の孔内面の中央部の近傍範囲Ｌ３（図３参照）に位置している。これに対し、第１接点部２６及び第２接点部２７の一方のみが、近傍範囲Ｌ３に位置し、第１接点部２６及び第２接点部２７の他方が、近傍範囲Ｌ３の範囲外且つスルーホール１２の孔内に位置していてもよい。 For example, in the above-described embodiment, both the first contact portion 26 and the second contact portion 27 are located in the vicinity range L3 (see FIG. 3) of the central portion of the hole inner surface of the through hole 12 . On the other hand, only one of the first contact portion 26 and the second contact portion 27 is located in the vicinity range L3, and the other of the first contact portion 26 and the second contact portion 27 is located outside the vicinity range L3 and through. It may be located within the bore of hole 12 .

更に、上記実施形態では、挿入方向におけるスルーホール１２の長さＬ２（図２参照）と、挿入方向における第１接点部２６と第２接点部２７との間の長さＬ１（図２参照）と、の比が、５：１～７：１である。これに対し、長さＬ２と長さＬ１との比が、５：１～７：１の範囲外であってもよい。 Furthermore, in the above embodiment, the length L2 of the through hole 12 in the insertion direction (see FIG. 2) and the length L1 between the first contact portion 26 and the second contact portion 27 in the insertion direction (see FIG. 2) and the ratio is 5:1 to 7:1. On the other hand, the ratio of length L2 to length L1 may be outside the range of 5:1 to 7:1.

更に、上記実施形態では、スルーホール１２及び端子２０の断面の双方が、矩形状であるが、スルーホール１２及び端子２０の断面の双方が、円形などの矩形状以外の形状であってもよい。 Furthermore, in the above embodiment, both the cross-sections of the through holes 12 and the terminals 20 are rectangular. .

ここで、上述した本発明に係る回路基板と端子との接続構造１、及び、端子２０の実施形態の特徴をそれぞれ以下［１］～［４］に簡潔に纏めて列記する。
［１］
回路基板（１０）と、前記回路基板（１０）に設けられたスルーホール（１２）に圧入される端子（２０）と、を接続するための、回路基板（１０）と端子（２０）との接続構造（１）であって、
前記回路基板（１０）は、
前記スルーホール（１２）の孔内面に位置する回路体（１３）と、前記回路体（１３）を覆う保護膜（１４）と、を有し、
前記端子（２０）は、
前記スルーホール（１２）への挿入方向に交差する幅方向に弾性変形可能な圧入部（２３）と、前記圧入部（２３）に対応した位置にある空洞部（２４）と、前記回路体（１３）に押圧接触するように前記圧入部（２３）に設けられる第１接点部（２６）と、前記挿入方向における前記第１接点部（２６）よりも後方において前記回路体（１３）に押圧接触するように前記圧入部（２３）に設けられる第２接点部（２７）と、を有し、
当該接続構造（１）は、
前記第１接点部（２６）及び前記第２接点部（２７）の双方が前記スルーホール（１２）の孔内に位置するように、前記圧入部（２３）が前記スルーホール（１２）に圧入される、ように構成される、
回路基板と端子との接続構造（１）。
［２］
上記［１］に記載の接続構造（１）において、
前記挿入方向における前記スルーホール（１２）の前記孔内面の中央部の近傍範囲（Ｌ３）に、前記第１接点部（２６）及び前記第２接点部（２７）の少なくとも一方が位置する、
回路基板と端子との接続構造（１）。
［３］
上記［１］又は上記［２］に記載の接続構造（１）において、
前記挿入方向における前記スルーホール（１２）の長さ（Ｌ２）と、前記挿入方向における前記第１接点部（２６）と前記第２接点部（２７）との間の長さ（Ｌ１）と、の比が、５：１～７：１である、
回路基板と端子との接続構造（１）。
［４］
回路基板（１０）に設けられたスルーホール（１２）に圧入される端子（２０）であって、
前記スルーホール（１２）への挿入方向に交差する幅方向に弾性変形可能な圧入部（２３）と、
前記圧入部（２３）に対応した位置にある空洞部（２４）と、
前記回路体（１３）に押圧接触するように前記圧入部（２３）に設けられる第１接点部（２６）と、
前記挿入方向における前記第１接点部（２６）よりも後方において前記回路体（１３）に押圧接触するように前記圧入部（２３）に設けられる第２接点部（２７）と、を備え、
前記挿入方向における前記スルーホール（１２）の長さ（Ｌ２）と、前記挿入方向における前記第１接点部（２６）と前記第２接点部（２７）との間の長さ（Ｌ１）と、の比が、５：１～７：１である、ように構成される、
端子（２０）。 Here, the features of the embodiments of the connection structure 1 between the circuit board and the terminal and the terminal 20 according to the present invention described above will be briefly summarized in [1] to [4] below.
[1]
A circuit board (10) and a terminal (20) for connecting a circuit board (10) and a terminal (20) press-fitted into a through hole (12) provided in the circuit board (10) A connection structure (1),
The circuit board (10) is
a circuit body (13) positioned on the inner surface of the through hole (12); and a protective film (14) covering the circuit body (13),
The terminal (20) is
A press-fit portion (23) elastically deformable in the width direction intersecting the direction of insertion into the through-hole (12), a hollow portion (24) at a position corresponding to the press-fit portion (23), and the circuit body ( 13), and a first contact portion (26) provided in the press-fitting portion (23) so as to press-contact with the circuit body (13) at a position behind the first contact portion (26) in the insertion direction. a second contact portion (27) provided in the press-fitting portion (23) so as to make contact;
The connection structure (1) is
The press-fit portion (23) is press-fitted into the through-hole (12) such that both the first contact portion (26) and the second contact portion (27) are positioned within the hole of the through-hole (12). be configured to be
A connection structure (1) between a circuit board and a terminal.
[2]
In the connection structure (1) described in [1] above,
At least one of the first contact portion (26) and the second contact portion (27) is positioned in a range (L3) near the center of the hole inner surface of the through hole (12) in the insertion direction,
A connection structure (1) between a circuit board and a terminal.
[3]
In the connection structure (1) according to [1] or [2] above,
The length (L2) of the through hole (12) in the insertion direction, the length (L1) between the first contact portion (26) and the second contact portion (27) in the insertion direction, is between 5:1 and 7:1.
A connection structure (1) between a circuit board and a terminal.
[4]
A terminal (20) press-fitted into a through hole (12) provided in a circuit board (10),
a press-fit portion (23) elastically deformable in a width direction intersecting the direction of insertion into the through hole (12);
a hollow portion (24) at a position corresponding to the press-fitting portion (23);
a first contact portion (26) provided in the press-fitting portion (23) so as to press-contact with the circuit body (13);
a second contact portion (27) provided in the press-fitting portion (23) so as to make pressure contact with the circuit body (13) behind the first contact portion (26) in the insertion direction;
The length (L2) of the through hole (12) in the insertion direction, the length (L1) between the first contact portion (26) and the second contact portion (27) in the insertion direction, is between 5:1 and 7:1
terminal (20).

１接続構造
１０回路基板
１２スルーホール
１３回路体
１４保護膜
２０端子
２３圧入部
２４空洞部
２６第１接点部
２７第２接点部
REFERENCE SIGNS LIST 1 connection structure 10 circuit board 12 through hole 13 circuit body 14 protective film 20 terminal 23 press-fit portion 24 cavity portion 26 first contact portion 27 second contact portion

Claims

A connection structure between a circuit board and a terminal for connecting a circuit board and a terminal press-fitted into a through hole provided in the circuit board,
The circuit board is
a circuit body positioned on the inner surface of the through hole; and a protective film covering the circuit body,
The terminal is
A press-fit portion that bulges on both sides in a width direction that intersects the direction of insertion into the through hole and is elastically deformable in the width direction, and a hollow portion that is located at a position corresponding to the press-fit portion, and press-contacts the circuit body. and a second contact portion provided in the press-fitting portion so as to make pressure contact with the circuit body behind the first contact portion in the insertion direction. death,
the pair of top surfaces of the press-fit portion are flat surfaces extending in the insertion direction;
A boundary portion between a slope portion on the front side in the insertion direction of the bulging press-fit portion and the top surface constitutes the first contact portion, and a slope portion on the rear side in the insertion direction of the bulging press-fit portion constitutes the first contact portion. A boundary portion with the top surface constitutes the second contact portion,
The connection structure is
After the press-fitting portion is press-fitted into the through-hole, both the first contact portion and the second contact portion are positioned within the hole of the through-hole, and the hole inner surface of the through-hole in the insertion direction. A range sandwiched between a position separated forward in the insertion direction by a length corresponding to 30% of the thickness of the circuit board from the central position of the circuit board and a position separated rearward in the insertion direction by that length. and the press-fitting portion is press-fitted into the through-hole such that both the first contact portion and the second contact portion are positioned;
A connection structure between a circuit board and a terminal.

In the connection structure according to claim 1,
Before the press-fit portion is press-fitted into the through-hole, the ratio of the length of the through-hole in the insertion direction to the length between the first contact portion and the second contact portion in the insertion direction is 5:1 to 7:1
A connection structure between a circuit board and a terminal.