JP2021018866A - Press-fit terminal and substrate with terminal - Google Patents

Press-fit terminal and substrate with terminal Download PDF

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JP2021018866A
JP2021018866A JP2019132518A JP2019132518A JP2021018866A JP 2021018866 A JP2021018866 A JP 2021018866A JP 2019132518 A JP2019132518 A JP 2019132518A JP 2019132518 A JP2019132518 A JP 2019132518A JP 2021018866 A JP2021018866 A JP 2021018866A
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hole
press
contact
inner peripheral
peripheral surface
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JP7326055B2 (en
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隆博 弓立
Takahiro Yudate
隆博 弓立
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Yazaki Corp
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Abstract

To secure both a low insertion force and a holding force.SOLUTION: A press-fit terminal includes a compliant part 20 that is pressed into a through hole 53 with a hole axial direction of the through hole of a substrate 50 as an insertion direction, and in which both ends in a width direction is pressure-welded to an inner peripheral surface 53c of the through hole by setting an orthogonal direction to the insertion direction to the width direction. The compliant part includes a pair of elastic parts 21 arranged in the width direction with an interval, and elastically deforming in response to a force from the inner peripheral surface of the though hole. An elastic part includes: a contact point CPt making a substrate side contact point CPb of the inner peripheral surface of the though hole contact at a press-in completion position; a contact start point Ps making the inner peripheral surface of the through hole contact at first when pressing-in it into the through hole; and a slide part 23 provided between the contact start point and a contact point, and making the inner peripheral surface of the through hole slide when pressing it into the through hole. On the front surface of the slide part, a graphene 40 is provided in a region where the contact between the contact point at the press-in completion position and a substrate side contact point is not obstructed.SELECTED DRAWING: Figure 1

Description

本発明は、プレスフィット端子及び端子付き基板に関する。 The present invention relates to a press-fit terminal and a substrate with terminals.

従来、プレスフィット端子は、基板のスルーホール等のような貫通孔に圧入させることによって、その貫通孔の内周面に圧接させる。よって、プレスフィット端子は、その圧接に伴う貫通孔に対する保持力の大きさ如何で、貫通孔への圧入作業時の挿入力が高くなる。そこで、例えば、従来のプレスフィット端子は、圧入に際しての先端側の肉厚を後端側よりも薄くすることによって、挿入力の低下を図っている（下記の特許文献１）。 Conventionally, the press-fit terminal is press-fitted into a through hole such as a through hole of a substrate, thereby press-fitting the inner peripheral surface of the through hole. Therefore, the press-fit terminal has a high insertion force during the press-fitting operation into the through hole, depending on the magnitude of the holding force with respect to the through hole due to the press fitting. Therefore, for example, in the conventional press-fit terminal, the insertion force is reduced by making the wall thickness on the front end side thinner than that on the rear end side at the time of press fitting (Patent Document 1 below).

特許第４０３０１２９号公報Japanese Patent No. 4030129

ところで、プレスフィット端子においては、貫通孔に対する挿入力を低下させつつも、その貫通孔に対する保持力の確保が求められる。しかしながら、従来のプレスフィット端子は、これらの両立が難しい。 By the way, in the press-fit terminal, it is required to secure the holding force for the through hole while reducing the insertion force for the through hole. However, it is difficult for the conventional press-fit terminal to achieve both of these.

そこで、本発明は、低挿入力化と保持力の確保とを両立させ得るプレスフィット端子及び端子付き基板を提供することを、その目的とする。 Therefore, an object of the present invention is to provide a press-fit terminal and a substrate with terminals that can achieve both a low insertion force and a secure holding force.

上記目的を達成する為、本発明に係るプレスフィット端子は、基板のスルーホールの孔軸方向を挿入方向にして前記スルーホールに圧入させ、かつ、前記挿入方向に対する直交方向を幅方向にして前記幅方向における両端を前記スルーホールの内周面に圧接させるコンプライアント部を有し、前記コンプライアント部は、前記幅方向で互いに間隔を空けて配置され、かつ、前記スルーホールの前記内周面からの力を受けて弾性変形させる一対の弾性部を有し、前記弾性部は、前記スルーホールに対する圧入完了位置で前記スルーホールの前記内周面の基板側接点に接触させる接点と、前記スルーホールへの圧入に際して前記スルーホールの前記内周面に最初に接触させる接触開始点と、前記接触開始点と前記接点との間に設け、前記スルーホールへの圧入に際して前記スルーホールの前記内周面に摺動させる摺動部と、を有し、前記摺動部の表面には、前記圧入完了位置での前記接点と前記基板側接点との接触を阻害しない領域にグラフェンを設けることを特徴としている。 In order to achieve the above object, the press-fit terminal according to the present invention is press-fitted into the through-hole with the hole axis direction of the through-hole of the substrate as the insertion direction, and the direction orthogonal to the insertion direction is the width direction. It has a compliant portion that presses both ends in the width direction to the inner peripheral surface of the through hole, the compliant portions are arranged at intervals in the width direction, and the inner peripheral surface of the through hole. It has a pair of elastic parts that are elastically deformed by receiving a force from the through holes, and the elastic parts are a contact that comes into contact with a substrate-side contact on the inner peripheral surface of the through hole at a press-fitting completion position with respect to the through hole, and the through. A contact start point that first contacts the inner peripheral surface of the through hole when press-fitting into the hole is provided between the contact start point and the contact, and the inner circumference of the through hole is provided when press-fitting into the through hole. It has a sliding portion that slides on a surface, and a graphene is provided on the surface of the sliding portion in a region that does not hinder the contact between the contact and the substrate side contact at the press-fitting completion position. It is said.

ここで、前記コンプライアント部は、前記幅方向における大きさが前記スルーホールの孔径よりも大きい幅広領域と、前記幅方向における大きさが前記スルーホールの前記孔径よりも小さい幅狭領域と、を有し、前記接点は、それぞれの前記弾性部における前記幅広領域部分に各々設け、それぞれの前記弾性部における前記幅広領域と前記幅狭領域の境界点を前記接触開始点とすることが望ましい。 Here, the compliant portion includes a wide region having a size in the width direction larger than the hole diameter of the through hole and a narrow region having a size in the width direction smaller than the hole diameter of the through hole. It is desirable that the contact points are provided in the wide region portions of the elastic portions, and the boundary point between the wide region and the narrow region in each elastic portion is set as the contact start point.

また、上記目的を達成する為、本発明に係る端子付き基板は、スルーホールを有する基板と、前記スルーホールに圧入されたプレスフィット端子と、を備え、前記プレスフィット端子は、前記スルーホールの孔軸方向を挿入方向にして前記スルーホールに圧入させ、かつ、前記挿入方向に対する直交方向を幅方向にして前記幅方向における両端を前記スルーホールの内周面に圧接させるコンプライアント部を有し、前記コンプライアント部は、前記幅方向で互いに間隔を空けて配置され、かつ、前記スルーホールの前記内周面からの力を受けて弾性変形させる一対の弾性部を有し、前記弾性部は、前記スルーホールに対する圧入完了位置で前記スルーホールの前記内周面の基板側接点に接触させる接点と、前記スルーホールへの圧入に際して前記スルーホールの前記内周面に最初に接触させる接触開始点と、前記接触開始点と前記接点との間に設け、前記スルーホールへの圧入に際して前記スルーホールの前記内周面に摺動させる摺動部と、を有し、前記摺動部の表面には、前記圧入完了位置での前記接点と前記基板側接点との接触を阻害しない領域にグラフェンを設けることを特徴としている。 Further, in order to achieve the above object, the substrate with terminals according to the present invention includes a substrate having a through hole and a press-fit terminal press-fitted into the through hole, and the press-fit terminal is of the through hole. It has a compliant portion that press-fits into the through hole with the hole axis direction as the insertion direction and presses both ends in the width direction to the inner peripheral surface of the through hole with the direction orthogonal to the insertion direction as the width direction. The compliant portions are arranged at intervals from each other in the width direction, and have a pair of elastic portions that are elastically deformed by receiving a force from the inner peripheral surface of the through hole. The contact that comes into contact with the substrate-side contact of the inner peripheral surface of the through hole at the press-fitting completion position with respect to the through hole, and the contact start point that first contacts the inner peripheral surface of the through hole when press-fitting into the through hole. And a sliding portion provided between the contact start point and the contact and sliding on the inner peripheral surface of the through hole when press-fitted into the through hole, and on the surface of the sliding portion. Is characterized in that graphene is provided in a region that does not hinder the contact between the contact and the substrate side contact at the press-fitting completion position.

本発明に係るプレスフィット端子のコンプライアント部においては、スルーホールに圧入する際に、その内周面にグラフェンを摺動させつつ、その内周面に接点を摺動させる。従って、本発明に係るプレスフィット端子及び端子付き基板は、コンプライアント部をスルーホールに圧入させる際の低層入力化と、圧入完了位置でのコンプライアント部のスルーホールに対する保持力の確保と、を両立させることができる。 In the compliant portion of the press-fit terminal according to the present invention, when press-fitting into the through hole, graphene is slid on the inner peripheral surface thereof, and the contact is slid on the inner peripheral surface thereof. Therefore, the press-fit terminal and the substrate with terminals according to the present invention have a low-layer input when the compliant portion is press-fitted into the through hole, and secure a holding force for the through-hole of the compliant portion at the press-fitting completion position. It can be compatible.

図１は、実施形態の端子付き基板をプレスフィット端子と基板とに分けて示す部分断面図である。FIG. 1 is a partial cross-sectional view showing a substrate with terminals of the embodiment divided into a press-fit terminal and a substrate. 図２は、図１のＸ−Ｘ線断面図である。FIG. 2 is a cross-sectional view taken along line XX of FIG. 図３は、端子付き基板の組付け工程を示す部分断面図であり、圧入開始位置を表している。FIG. 3 is a partial cross-sectional view showing an assembling process of the substrate with terminals, and shows a press-fitting start position. 図４は、端子付き基板の組付け工程を示す部分断面図であり、圧入途中位置を表している。FIG. 4 is a partial cross-sectional view showing an assembling process of the substrate with terminals, and shows a position during press fitting. 図５は、端子付き基板の組付け工程を示す部分断面図であり、圧入完了位置を表している。FIG. 5 is a partial cross-sectional view showing an assembling process of the substrate with terminals, and shows a press-fitting completion position. 図６は、実施形態の端子付き基板をプレスフィット端子と変形形態の基板とに分けて示す部分断面図である。FIG. 6 is a partial cross-sectional view showing the substrate with terminals of the embodiment divided into a press-fit terminal and a modified substrate. 図７は、変形形態の基板が適用された端子付き基板の組付け工程を示す部分断面図であり、圧入開始位置を表している。FIG. 7 is a partial cross-sectional view showing a process of assembling a substrate with terminals to which a modified substrate is applied, and shows a press-fitting start position. 図８は、変形形態の基板が適用された端子付き基板の組付け工程を示す部分断面図であり、圧入途中位置を表している。FIG. 8 is a partial cross-sectional view showing a process of assembling a substrate with terminals to which a modified substrate is applied, and shows a position during press fitting. 図９は、変形形態の基板が適用された端子付き基板の組付け工程を示す部分断面図であり、圧入完了位置を表している。FIG. 9 is a partial cross-sectional view showing a process of assembling a substrate with terminals to which a modified substrate is applied, and shows a press-fitting completion position.

以下に、本発明に係るプレスフィット端子及び端子付き基板の実施形態を図面に基づいて詳細に説明する。尚、この実施形態によりこの発明が限定されるものではない。 Hereinafter, embodiments of the press-fit terminal and the substrate with terminals according to the present invention will be described in detail with reference to the drawings. The present invention is not limited to this embodiment.

［実施形態］
本発明に係るプレスフィット端子及び端子付き基板の実施形態の１つを図１から図９に基づいて説明する。 [Embodiment]
One of the press-fit terminals and the substrate with terminals according to the present invention will be described with reference to FIGS. 1 to 9.

図１から図５の符号１は、本実施形態のプレスフィット端子を示す。また、図１及び図３から図５の符号５は、そのプレスフィット端子１が基板（例えば、プリント基板等）５０に取り付けられた端子付き基板を示す。尚、各図に示すプレスフィット端子１と基板５０は、各々、その一部分を抜粋したものである。 Reference numerals 1 in FIGS. 1 to 5 indicate press-fit terminals of the present embodiment. Reference numerals 5 in FIGS. 1 and 3 to 5 indicate a circuit board with terminals to which the press-fit terminal 1 is attached to a substrate (for example, a printed circuit board or the like) 50. The press-fit terminal 1 and the substrate 50 shown in each figure are excerpts of a part thereof.

ここで示すプレスフィット端子１は、プリント基板として構成された基板５０に取り付けられる。その基板５０は、絶縁性の基板本体５１と、この基板本体５１に形成された導電性の回路部５２と、この回路部５２に電気接続させたスルーホール５３と、を備える（図１及び図３から図５）。 The press-fit terminal 1 shown here is attached to a substrate 50 configured as a printed circuit board. The substrate 50 includes an insulating substrate main body 51, a conductive circuit portion 52 formed in the substrate main body 51, and a through hole 53 electrically connected to the circuit portion 52 (FIGS. 1 and 1). 3 to 5).

この例示の基板５０においては、平板状の基板本体５１の表面に回路パターン等の回路部５２が形成されている。但し、基板５０は、基板本体５１の表面や基板本体５１を成す複数の絶縁層の間に回路部５２を複数層に分けて設けたもの（つまり、多層基板として構成されたもの）であってもよい。 In the illustrated substrate 50, a circuit portion 52 such as a circuit pattern is formed on the surface of the flat plate-shaped substrate main body 51. However, the substrate 50 is provided with the circuit unit 52 divided into a plurality of layers between the surface of the substrate body 51 and the plurality of insulating layers forming the substrate body 51 (that is, the substrate 50 is configured as a multilayer substrate). May be good.

スルーホール５３は、基板本体５１の板厚方向を孔軸方向とする貫通孔５３ａと、この貫通孔５３ａの内周面５３ａ1を覆うが如く当該内周面５３ａ1に設けた筒状の電気接続部５３ｂと、を有する（図１）。電気接続部５３ｂは、その内周面５３ａ1に形成された銅メッキ等のメッキ層である。この電気接続部５３ｂは、回路部５２に対して物理的且つ電気的に接続させるべく、その筒状部分から回路部５２に向けて延在させている。 The through hole 53, the through hole 53a and a cylindrical electric provided on the inner peripheral surface 53a 1 as if the inner peripheral surface 53a 1 covering of the through hole 53a of the plate thickness direction of the substrate main body 51 and Anajiku direction It has a connecting portion 53b (FIG. 1). The electrical connection portion 53b is a plating layer such as copper plating formed on the inner peripheral surface 53a 1 . The electrical connection portion 53b extends from the tubular portion toward the circuit portion 52 so as to be physically and electrically connected to the circuit portion 52.

ここでは、その電気接続部５３ｂの内周面がスルーホール５３の内周面５３ｃとなる（図１及び図３から図５）。よって、このスルーホール５３においては、その内周面５３ｃの全域をプレスフィット端子１との接点として利用することができる。但し、このスルーホール５３においては、設計上、圧入完了位置のプレスフィット端子１との間での相対的な位置関係が定められている。従って、このスルーホール５３では、孔軸方向における一部の環状部を設計上の基板側接点ＣＰｂとして設定している（図１及び図３から図５）。この例示のスルーホール５３は、円柱状に形成された貫通孔５３ａと、円筒状に形成された電気接続部５３ｂと、を有しており、円環状の基板側接点ＣＰｂの周方向における２箇所にプレスフィット端子１のそれぞれの接点ＣＰｔを接触させる。 Here, the inner peripheral surface of the electrical connection portion 53b is the inner peripheral surface 53c of the through hole 53 (FIGS. 1 and 3 to 5). Therefore, in the through hole 53, the entire area of the inner peripheral surface 53c can be used as a contact point with the press-fit terminal 1. However, in this through hole 53, a relative positional relationship with the press-fit terminal 1 at the press-fitting completion position is defined by design. Therefore, in the through hole 53, a part of the annular portion in the hole axis direction is set as the design substrate side contact CPb (FIGS. 1 and 3 to 5). The through hole 53 of this example has a through hole 53a formed in a columnar shape and an electrical connection portion 53b formed in a cylindrical shape, and has two locations in the circumferential direction of the annular substrate side contact CPb. The contact points CPt of the press-fit terminal 1 are brought into contact with each other.

プレスフィット端子１は、金属等の導電性材料（例えば、銅や銅合金等）で成形される。このプレスフィット端子１は、その表面にメッキ層が形成されたものであってもよい。例えば、そのメッキ層には、錫メッキ、銀メッキ又は金メッキ等が適用される。 The press-fit terminal 1 is formed of a conductive material such as metal (for example, copper or a copper alloy). The press-fit terminal 1 may have a plating layer formed on its surface. For example, tin plating, silver plating, gold plating, or the like is applied to the plating layer.

このプレスフィット端子１は、一方の先端に設けた先端部１０と、他方の先端に設けた端子部（図示略）と、先端部１０と端子部の間に設けたコンプライアント部２０と、端子部とコンプライアント部２０の間に設けた基部３０と、を有する（図１及び図３から図５）。このプレスフィット端子１は、先端部１０、コンプライアント部２０、基部３０、端子部の順に連接されている。そして、このプレスフィット端子１においては、少なくとも先端部１０とコンプライアント部２０と基部３０とが挿入方向に沿って連なっている。例えば、このプレスフィット端子１は、基部３０を直線状に形成することによって、先端部１０から端子部までを挿入方向に沿って連ならせた直線形状の端子金具となる。一方、このプレスフィット端子１は、基部３０を折り曲げることによって、先端部１０及びコンプライアント部２０と端子部とを交差させたＬ字等の交差形状の端子金具となる。 The press-fit terminal 1 includes a tip portion 10 provided at one tip, a terminal portion (not shown) provided at the other tip, a compliant portion 20 provided between the tip portion 10 and the terminal portion, and a terminal. It has a base portion 30 provided between the portions and the compliant portion 20 (FIGS. 1 and 3 to 5). The press-fit terminal 1 is connected in the order of the tip portion 10, the compliant portion 20, the base portion 30, and the terminal portion. In this press-fit terminal 1, at least the tip portion 10, the compliant portion 20, and the base portion 30 are connected along the insertion direction. For example, the press-fit terminal 1 is a linear terminal fitting in which the base portion 30 is formed in a straight line so that the tip portion 10 to the terminal portion are connected along the insertion direction. On the other hand, the press-fit terminal 1 becomes an L-shaped cross-shaped terminal fitting in which the tip portion 10 and the compliant portion 20 and the terminal portion intersect by bending the base portion 30.

このプレスフィット端子１は、基板５０のスルーホール５３の孔軸方向を挿入方向にして当該スルーホール５３に圧入させ、かつ、その挿入方向に対する直交方向を幅方向にして当該幅方向における両端をスルーホール５３の内周面５３ｃに圧接させる。例えば、ここで示すプレスフィット端子１は、挿入方向に沿って先端部１０からスルーホール５３に挿入させ、そのスルーホール５３に対する圧入完了位置までコンプライアント部２０を圧入させる。その圧入完了位置では、コンプライアント部２０の幅方向における両端をスルーホール５３の内周面５３ｃに圧接させる。 The press-fit terminal 1 is press-fitted into the through hole 53 with the hole axis direction of the through hole 53 of the substrate 50 as the insertion direction, and through both ends in the width direction with the direction orthogonal to the insertion direction as the width direction. It is pressed against the inner peripheral surface 53c of the hole 53. For example, the press-fit terminal 1 shown here is inserted into the through hole 53 from the tip portion 10 along the insertion direction, and the compliant portion 20 is press-fitted to the press-fitting completion position with respect to the through-hole 53. At the press-fitting completion position, both ends of the compliant portion 20 in the width direction are pressed against the inner peripheral surface 53c of the through hole 53.

先端部１０は、幅（幅方向における大きさ）Ｗ１がスルーホール５３の孔径Ｒよりも小さくなるように形成される（図１）。この先端部１０の幅Ｗ１は、全て同じ大きさであってもよく、場所によって異なる大きさであってもよい。 The tip portion 10 is formed so that the width (size in the width direction) W1 is smaller than the hole diameter R of the through hole 53 (FIG. 1). The widths W1 of the tip portions 10 may all have the same size, or may have different sizes depending on the location.

コンプライアント部２０は、スルーホール５３に圧入させる圧入部である。このコンプライアント部２０は、幅方向で互いに間隔を空けて配置され、かつ、スルーホール５３の内周面５３ｃからの力を受けて弾性変形させる一対の弾性部２１を有する（図１から図５）。それぞれの弾性部２１は、一端が先端部１０に連結され、他端が基部３０に連結される。よって、このコンプライアント部２０には、その一対の弾性部２１の間で且つ先端部１０と基部３０の間に貫通孔２２が設けられている（図１から図５）。ここで示す貫通孔２２は、挿入方向を長手方向とする長円形に形成されている。このコンプライアント部２０は、スルーホール５３に圧入させていくことによって、例えば、一対の弾性部２１が幅方向で貫通孔２２側に弾性変形させられる。 The compliant portion 20 is a press-fitting portion to be press-fitted into the through hole 53. The compliant portions 20 have a pair of elastic portions 21 that are arranged at intervals in the width direction and elastically deform by receiving a force from the inner peripheral surface 53c of the through hole 53 (FIGS. 1 to 5). ). One end of each elastic portion 21 is connected to the tip portion 10, and the other end is connected to the base portion 30. Therefore, the compliant portion 20 is provided with a through hole 22 between the pair of elastic portions 21 and between the tip portion 10 and the base portion 30 (FIGS. 1 to 5). The through hole 22 shown here is formed in an oval shape with the insertion direction as the longitudinal direction. By press-fitting the compliant portion 20 into the through hole 53, for example, a pair of elastic portions 21 are elastically deformed toward the through hole 22 in the width direction.

弾性部２１は、スルーホール５３に対する圧入完了位置でスルーホール５３の内周面５３ｃの基板側接点ＣＰｂに接触させる接点ＣＰｔ（図１及び図３から図５）と、スルーホール５３への圧入に際してスルーホール５３の内周面５３ｃに最初に接触させる接触開始点Ｐｓ（図１及び図３）と、を有する。その接点ＣＰｔは、基板側接点ＣＰｂに対応させた設計上のものとして設定されている。弾性部２１は、そのような接点ＣＰｔと接触開始点Ｐｓとを有するものであれば、如何様な形状に形成されたものであってもよい。換言するならば、コンプライアント部２０は、そのような弾性部２１と貫通孔２２を有するものであれば、如何様な形状に形成されたものであってもよい。 The elastic portion 21 is a contact CPt (FIGS. 1 and 3 to 5) that comes into contact with the substrate-side contact CPb of the inner peripheral surface 53c of the through hole 53 at the press-fitting completed position with respect to the through-hole 53, and upon press-fitting into the through-hole 53. It has contact start points Ps (FIGS. 1 and 3) that are first brought into contact with the inner peripheral surface 53c of the through hole 53. The contact CPt is set as a design corresponding to the substrate side contact CPb. The elastic portion 21 may be formed in any shape as long as it has such a contact CPt and a contact start point Ps. In other words, the compliant portion 20 may be formed in any shape as long as it has such an elastic portion 21 and a through hole 22.

例えば、コンプライアント部２０は、幅（幅方向における大きさ）Ｗ２がスルーホール５３の孔径Ｒよりも大きい幅広領域２０ａと、幅（幅方向における大きさ）Ｗ３がスルーホール５３の孔径Ｒよりも小さい先端部１０側の幅狭領域２０ｂと、を有している（図１及び図３から図５）。幅広領域２０ａの幅Ｗ２は、それぞれの接点ＣＰｔの間が最も広くなっており、この間よりも先端部１０側が狭くなっている。また、幅狭領域２０ｂの幅Ｗ３は、全て同じ大きさであってもよく、場所によって異なる大きさであってもよい。 For example, the compliant portion 20 has a wide region 20a in which the width (size in the width direction) W2 is larger than the hole diameter R of the through hole 53 and the width (size in the width direction) W3 is larger than the hole diameter R of the through hole 53. It has a narrow region 20b on the small tip portion 10 side (FIGS. 1 and 3 to 5). The width W2 of the wide region 20a is the widest between the respective contact points CPt, and the tip portion 10 side is narrower than this interval. Further, the widths W3 of the narrow region 20b may all have the same size, or may have different sizes depending on the location.

このコンプライアント部２０においては、それぞれの弾性部２１における幅広領域２０ａ部分が、スルーホール５３の内周面５３ｃに圧接させる圧接部となる。よって、接点ＣＰｔは、それぞれの弾性部２１における幅広領域２０ａ部分に各々設ける。そして、このコンプライアント部２０においては、それぞれの弾性部２１における幅広領域２０ａと幅狭領域２０ｂの境界点が接触開始点Ｐｓとなる。それぞれの弾性部２１における幅狭領域２０ｂ部分は、それぞれの弾性部２１における幅広領域２０ａ部分を先端部１０に繋ぐ連結部と云える。 In the compliant portion 20, the wide region 20a portion of each elastic portion 21 serves as a pressure contact portion that is pressed against the inner peripheral surface 53c of the through hole 53. Therefore, the contact points CPt are provided in the wide region 20a portion of each elastic portion 21. Then, in the compliant portion 20, the boundary point between the wide region 20a and the narrow region 20b in each elastic portion 21 becomes the contact start point Ps. The narrow region 20b portion of each elastic portion 21 can be said to be a connecting portion connecting the wide region 20a portion of each elastic portion 21 to the tip portion 10.

コンプライアント部２０においては、幅広領域２０ａの幅Ｗ２を挿入方向に沿って徐々に変化させている場合、先に示したように、その幅Ｗ２が最も大きい部分を接点ＣＰｔとして利用する。例えば、コンプライアント部２０においては、それぞれの弾性部２１が幅方向でスルーホール５３の内周面５３ｃ側に凸の弧状に形成されている場合、その弧状の頂点を接点ＣＰｔとして利用する。また、コンプライアント部２０においては、幅広領域２０ａで幅Ｗ２の最大値が一定になっている場所が存在している場合、その場所における圧入完了位置で基板側接点ＣＰｂに接触する点を接点ＣＰｔとして利用する。例えば、コンプライアント部２０においては、それぞれの弾性部２１における幅広領域２０ａ部分の幅方向の端面が、挿入方向に沿って続く均一面と、それぞれの弾性部２１における幅狭領域２０ｂ部分の幅方向の端面に繋げるべく傾斜させた傾斜面と、を有する場合、その均一面における圧入完了位置で基板側接点ＣＰｂに接触する点を接点ＣＰｔとして利用する。ここでは、この後者の場合について例示している。この例示のコンプライアント部２０においては、その傾斜面に連なる傾斜面としてそれぞれの弾性部２１における幅狭領域２０ｂ部分の幅方向の端面が形成されており、その端面が先端部１０における幅方向の端面に繋がれている。 In the compliant portion 20, when the width W2 of the wide region 20a is gradually changed along the insertion direction, as shown above, the portion having the largest width W2 is used as the contact CPt. For example, in the compliant portion 20, when each elastic portion 21 is formed in a convex arc shape on the inner peripheral surface 53c side of the through hole 53 in the width direction, the arc-shaped apex is used as a contact CPt. Further, in the compliant portion 20, if there is a place where the maximum value of the width W2 is constant in the wide region 20a, the point of contact with the substrate side contact CPb at the press-fitting completion position at that place is the contact CPt. Use as. For example, in the compliant portion 20, the end face in the width direction of the wide region 20a portion in each elastic portion 21 is a uniform surface continuing along the insertion direction, and the width direction of the narrow region 20b portion in each elastic portion 21. When it has an inclined surface inclined so as to be connected to the end surface of the above, the point of contact with the substrate side contact CPb at the press-fitting completion position on the uniform surface is used as the contact CPt. Here, this latter case is illustrated. In the compliant portion 20 of this example, an end surface in the width direction of the narrow region 20b portion in each elastic portion 21 is formed as an inclined surface connected to the inclined surface, and the end surface is in the width direction of the tip portion 10. It is connected to the end face.

この例示のコンプライアント部２０とスルーホール５３の間では、接点ＣＰｔと基板側接点ＣＰｂとで互いの導通を図るが、圧入完了位置でのそれぞれの弾性部２１の弾性変形後の形状如何で、その接点ＣＰｔと基板側接点ＣＰｂとの間以外で電気接続される場合も有り得る。 Between the compliant portion 20 and the through hole 53 of this example, the contact CPt and the substrate-side contact CPb are connected to each other, but depending on the shape of each elastic portion 21 after elastic deformation at the press-fitting completion position. There may be a case where an electric connection is made other than between the contact CPt and the substrate side contact CPb.

尚、この例示のコンプライアント部２０は、基部３０側にも、幅（幅方向における大きさ）Ｗ４がスルーホール５３の孔径Ｒよりも小さい幅狭領域２０ｃを有している（図１及び図３から図５）。その幅狭領域２０ｂの幅Ｗ４は、全て同じ大きさであってもよく、場所によって異なる大きさであってもよい。それぞれの弾性部２１における幅狭領域２０ｃ部分は、それぞれの弾性部２１における幅広領域２０ａ部分を基部３０に繋ぐ連結部と云える。例えば、この例示の基部３０は、先端部１０と同じように、幅（幅方向における大きさ）Ｗ５がスルーホール５３の孔径Ｒよりも小さくなるように形成されている（図１）。よって、それぞれの弾性部２１における幅広領域２０ａ部分は、自らの幅方向の端面として、それぞれの弾性部２１における幅狭領域２０ｃ部分の幅方向の端面に繋げるべく傾斜させた傾斜面も有している。そして、それぞれの弾性部２１における幅狭領域２０ｃ部分の幅方向の端面は、その傾斜面に連なり、かつ、基部３０における幅方向の端面に繋げる傾斜面として形成されている。 The compliant portion 20 of this example also has a narrow region 20c whose width (size in the width direction) W4 is smaller than the hole diameter R of the through hole 53 on the base portion 30 side (FIGS. 1 and FIG. 3 to 5). The widths W4 of the narrow region 20b may all have the same size, or may have different sizes depending on the location. The narrow region 20c portion in each elastic portion 21 can be said to be a connecting portion connecting the wide region 20a portion in each elastic portion 21 to the base portion 30. For example, the base portion 30 of this example is formed so that the width (size in the width direction) W5 is smaller than the hole diameter R of the through hole 53, similarly to the tip portion 10 (FIG. 1). Therefore, the wide region 20a portion of each elastic portion 21 also has an inclined surface inclined so as to be connected to the width direction end surface of the narrow region 20c portion of each elastic portion 21 as its own width direction end surface. There is. The widthwise end face of the narrow region 20c portion of each elastic portion 21 is formed as an inclined surface that is continuous with the inclined surface and is connected to the widthwise end surface of the base portion 30.

このコンプライアント部２０は、それぞれの弾性部２１における幅広領域２０ａ部分を内周面５３ｃに摺動させながらスルーホール５３に圧入されていく。よって、弾性部２１は、接触開始点Ｐｓと接点ＣＰｔとの間に、スルーホール５３への圧入に際して当該スルーホール５３の内周面５３ｃに摺動させる摺動部２３を有している（図１及び図３から図５）。また、この例示の弾性部２１においては、接点ＣＰｔとそれぞれの弾性部２１における幅広領域２０ａ及び幅狭領域２０ｃの境界部分との間にも、スルーホール５３の内周面５３ｃに対する摺動部２４が存在している（図１及び図３から図５）。摺動部２３は、接触開始点Ｐｓと接点ＣＰｔとの間で接触開始点Ｐｓから接点ＣＰｔに亘る一繋がりの部位であってもよく、その間で複数箇所に分散して存在させた部位であってもよい。これと同じように、摺動部２４は、接点ＣＰｔと上記の境界部分との間で接点ＣＰｔから当該境界部分に亘る一繋がりの部位であってもよく、その間で複数箇所に分散して存在させた部位であってもよい。この例示では、それぞれの弾性部２１における幅広領域２０ａ部分の幅方向の端面の内、均一面における接点ＣＰｔよりも幅狭領域２０ｂ側と幅狭領域２０ｂ側の傾斜面とが摺動部２３になる。一方、この例示では、それぞれの弾性部２１における幅広領域２０ａ部分の幅方向の端面の内、均一面における接点ＣＰｔよりも幅狭領域２０ｃ側と幅狭領域２０ｃ側の傾斜面とが摺動部２４になる。 The compliant portion 20 is press-fitted into the through hole 53 while sliding the wide region 20a portion of each elastic portion 21 on the inner peripheral surface 53c. Therefore, the elastic portion 21 has a sliding portion 23 between the contact start point Ps and the contact CPt that slides on the inner peripheral surface 53c of the through hole 53 when press-fitting into the through hole 53 (FIG. FIG. 1 and FIGS. 3 to 5). Further, in the elastic portion 21 of this example, the sliding portion 24 with respect to the inner peripheral surface 53c of the through hole 53 is also between the contact CPt and the boundary portion between the wide region 20a and the narrow region 20c in each elastic portion 21. Exists (FIGS. 1 and 3 to 5). The sliding portion 23 may be a connecting portion between the contact starting point Ps and the contact CPt from the contact starting point Ps to the contact CPt, and is a portion dispersed and present at a plurality of locations between them. You may. Similarly to this, the sliding portion 24 may be a connecting portion between the contact CPt and the above-mentioned boundary portion from the contact CPt to the boundary portion, and may be dispersed in a plurality of locations between them. It may be a site that has been subjected to. In this example, among the end faces in the width direction of the wide region 20a portion of each elastic portion 21, the narrow region 20b side and the narrow region 20b side inclined surface of the contact CPt on the uniform surface are formed on the sliding portion 23. Become. On the other hand, in this example, among the end faces in the width direction of the wide region 20a portion in each elastic portion 21, the narrow region 20c side and the narrow region 20c side inclined surface on the uniform surface are sliding portions. It becomes 24.

ここで、コンプライアント部２０においては、スルーホール５３に対する保持力を高めるために、スルーホール５３への圧入に際して、その内周面５３ｃに摺動させながら金属同士の凝着摩耗を発生させることが望ましい。しかしながら、その凝着摩耗の発生は、コンプライアント部２０をスルーホール５３に圧入する際の挿入力の増大を引き起こす一因となる。 Here, in the compliant portion 20, in order to increase the holding force against the through hole 53, when press-fitting into the through hole 53, metal-to-metal adhesion wear may be generated while sliding on the inner peripheral surface 53c thereof. desirable. However, the occurrence of the adhesive wear contributes to an increase in the insertion force when the compliant portion 20 is press-fitted into the through hole 53.

そこで、このコンプライアント部２０においては、接点ＣＰｔよりも先端部１０側の摺動部２３の表面にグラフェン４０を設ける（図１から図５）。そのグラフェン４０は、その摺動部２３の表面の内、圧入完了位置での接点ＣＰｔと基板側接点ＣＰｂとの接触を阻害しない領域（つまり、接点ＣＰｔを除いた所定領域）に設ける。このグラフェン４０は、プレスフィット端子１や基板５０の設計公差等に伴うずれを考慮して、接触開始点Ｐｓよりも先端部１０側に延在させることが望ましい。尚、図中のグラフェン４０は、図示の便宜上、クロスハッチングを付し且つ誇張するなどして判別できるようにしている。 Therefore, in the compliant portion 20, graphene 40 is provided on the surface of the sliding portion 23 on the tip portion 10 side of the contact CPt (FIGS. 1 to 5). The graphene 40 is provided on the surface of the sliding portion 23 in a region (that is, a predetermined region excluding the contact CPt) that does not hinder the contact between the contact CPt at the press-fitting completion position and the substrate-side contact CPb. It is desirable that the graphene 40 extends closer to the tip portion 10 than the contact start point Ps in consideration of the deviation due to the design tolerance of the press-fit terminal 1 and the substrate 50. The graphene 40 in the drawing is cross-hatched and exaggerated so that it can be identified for convenience of illustration.

グラフェン４０は、例えば、摺動部２３の表面の所定領域に対しての塗布等のコーティングを施したり、印刷を行ったりするなどして、その所定領域に成膜させる。また、グラフェン４０は、単層体として成形されたものであってもよく、多層体として成形されたものであってもよい。 The graphene 40 is formed into a film on a predetermined region of the surface of the sliding portion 23, for example, by applying a coating such as coating to a predetermined region or printing. Further, the graphene 40 may be molded as a single layer body or may be molded as a multilayer body.

グラフェン４０は、その摩擦係数がスルーホール５３の内周面５３ｃの摩擦係数よりも低い。よって、このコンプライアント部２０においては、摺動部２３の表面の所定領域とスルーホール５３の内周面５３ｃとの間にグラフェン４０を介在させていない場合と比較して、その間での金属同士の凝着摩耗の発生を抑えることができるので、スルーホール５３に圧入する際の挿入力を低下させることができる。一方、このコンプライアント部２０においては、接点ＣＰｔを露出させているので、スルーホール５３に圧入する際に、接点ＣＰｔとスルーホール５３の内周面５３ｃとの間で金属同士の凝着摩耗を発生させることができる。よって、このコンプライアント部２０は、圧入完了位置でスルーホール５３に対する保持力を高めることができる。このように、このコンプライアント部２０は、スルーホール５３に対する挿入力を低下させつつ、そのスルーホール５３に対する保持力を確保することができる。そして、このコンプライアント部２０は、接点ＣＰｔと基板側接点ＣＰｂの接触信頼性を向上させ、その間の通電品質を向上させることができる。 The friction coefficient of graphene 40 is lower than the friction coefficient of the inner peripheral surface 53c of the through hole 53. Therefore, in the compliant portion 20, the metals between the compliant portions 20 are compared with the case where the graphene 40 is not interposed between the predetermined region on the surface of the sliding portion 23 and the inner peripheral surface 53c of the through hole 53. Since the occurrence of adhesive wear can be suppressed, the insertion force at the time of press-fitting into the through hole 53 can be reduced. On the other hand, since the contact CPt is exposed in the compliant portion 20, when press-fitting into the through hole 53, metal-to-metal adhesion wear occurs between the contact CPt and the inner peripheral surface 53c of the through hole 53. Can be generated. Therefore, the compliant portion 20 can increase the holding force with respect to the through hole 53 at the press-fitting complete position. In this way, the compliant portion 20 can secure the holding force for the through hole 53 while reducing the insertion force for the through hole 53. Then, the compliant portion 20 can improve the contact reliability between the contact CPt and the substrate-side contact CPb, and can improve the energization quality between them.

更に、このコンプライアント部２０においては、摺動部２４の表面にグラフェンを設けておらず、その摺動部２４の表面を露出させている。よって、このコンプライアント部２０においては、スルーホール５３に圧入する際に、摺動部２４の表面とスルーホール５３の内周面５３ｃとの間で金属同士の凝着摩耗を発生させることができる。よって、このコンプライアント部２０は、圧入完了位置でスルーホール５３に対する保持力を更に高めることができる。 Further, in the compliant portion 20, graphene is not provided on the surface of the sliding portion 24, and the surface of the sliding portion 24 is exposed. Therefore, in the compliant portion 20, when press-fitting into the through hole 53, metal-to-metal adhesion wear can be generated between the surface of the sliding portion 24 and the inner peripheral surface 53c of the through hole 53. .. Therefore, the compliant portion 20 can further increase the holding force with respect to the through hole 53 at the press-fitting completion position.

以上示したように、このコンプライアント部２０においては、スルーホール５３に圧入する際に、その内周面５３ｃ（電気接続部５３ｂの内周面）にグラフェン４０を摺動させつつ、その内周面５３ｃ（電気接続部５３ｂの内周面）に接点ＣＰｔや摺動部２４の表面を摺動させる。従って、本実施形態のプレスフィット端子１及び端子付き基板５は、コンプライアント部２０をスルーホール５３に圧入させる際の低層入力化と、圧入完了位置でのコンプライアント部２０のスルーホール５３に対する保持力の確保と、を両立させることができる。 As shown above, in the compliant portion 20, when press-fitting into the through hole 53, the graphene 40 is slid on the inner peripheral surface 53c (inner peripheral surface of the electrical connection portion 53b), and the inner circumference thereof is slid. The surface of the contact CPt or the sliding portion 24 is slid on the surface 53c (the inner peripheral surface of the electrical connection portion 53b). Therefore, the press-fit terminal 1 and the substrate with terminals 5 of the present embodiment have a low-layer input when the compliant portion 20 is press-fitted into the through-hole 53, and the compliant portion 20 is held in the through-hole 53 at the press-fitting completion position. It is possible to secure both power and security.

ところで、近年、基板５０においては、プリフラックス処理を行って、スルーホール５３の電気接続部５３ｂの表面に水溶性プリフラックス（所謂ＯＳＰ）層５３ｄが形成される（図６から図９）。本実施形態のプレスフィット端子１においては、コンプライアント部２０をスルーホール５３に圧入させる際に、このコンプライアント部２０のグラフェン４０（例えば、それぞれの弾性部２１における幅広領域２０ａ部分の傾斜面側のグラフェン４０）がＯＳＰ層５３ｄを削り取りながら、スルーホール５３の内周面５３ｃ（電気接続部５３ｂの内周面）を露出させる（図７から図９）。よって、そのコンプライアント部２０においては、スルーホール５３に圧入する際に、その内周面５３ｃ（電気接続部５３ｂの内周面）にグラフェン４０を摺動させつつ、その内周面５３ｃ（電気接続部５３ｂの内周面）に接点ＣＰｔや摺動部２４の表面を摺動させることができる。従って、本実施形態のプレスフィット端子１及び端子付き基板５は、基板５０にＯＳＰ層５３ｄが設けられていた場合でも、コンプライアント部２０をスルーホール５３に圧入させる際の低層入力化と、圧入完了位置でのコンプライアント部２０のスルーホール５３に対する保持力の確保と、を両立させることができる。 By the way, in recent years, in the substrate 50, a water-soluble preflux (so-called OSP) layer 53d is formed on the surface of the electrical connection portion 53b of the through hole 53 by performing a preflux treatment (FIGS. 6 to 9). In the press-fit terminal 1 of the present embodiment, when the compliant portion 20 is press-fitted into the through hole 53, the graphene 40 of the compliant portion 20 (for example, the inclined surface side of the wide region 20a portion in each elastic portion 21). Graphene 40) exposes the inner peripheral surface 53c (inner peripheral surface of the electrical connection portion 53b) of the through hole 53 while scraping off the OSP layer 53d (FIGS. 7 to 9). Therefore, in the compliant portion 20, when press-fitting into the through hole 53, the graphene 40 is slid on the inner peripheral surface 53c (inner peripheral surface of the electrical connection portion 53b), and the inner peripheral surface 53c (electricity) thereof. The surface of the contact CPt or the sliding portion 24 can be slid on the inner peripheral surface of the connecting portion 53b). Therefore, in the press-fit terminal 1 and the substrate 5 with terminals of the present embodiment, even when the OSP layer 53d is provided on the substrate 50, the compliant portion 20 is press-fitted into the through-hole 53 with a low-layer input. It is possible to secure the holding force of the compliant portion 20 with respect to the through hole 53 at the completed position at the same time.

１ プレスフィット端子
５ 端子付き基板
２０ コンプライアント部
２０ａ 幅広領域
２０ｂ 幅狭領域
２１ 弾性部
２３ 摺動部
４０ グラフェン
５０ 基板
５３ スルーホール
５３ｃ 内周面
ＣＰｂ 基板側接点
ＣＰｔ 接点
Ｐｓ 接触開始点 1 Press-fit terminal 5 Substrate with terminal 20 Compliant part 20a Wide area 20b Narrow area 21 Elastic part 23 Sliding part 40 Graphene 50 Board 53 Through hole 53c Inner peripheral surface CPb Board side contact CPt contact Ps Contact start point

Claims (3)

基板のスルーホールの孔軸方向を挿入方向にして前記スルーホールに圧入させ、かつ、前記挿入方向に対する直交方向を幅方向にして前記幅方向における両端を前記スルーホールの内周面に圧接させるコンプライアント部を有し、
前記コンプライアント部は、前記幅方向で互いに間隔を空けて配置され、かつ、前記スルーホールの前記内周面からの力を受けて弾性変形させる一対の弾性部を有し、
前記弾性部は、前記スルーホールに対する圧入完了位置で前記スルーホールの前記内周面の基板側接点に接触させる接点と、前記スルーホールへの圧入に際して前記スルーホールの前記内周面に最初に接触させる接触開始点と、前記接触開始点と前記接点との間に設け、前記スルーホールへの圧入に際して前記スルーホールの前記内周面に摺動させる摺動部と、を有し、
前記摺動部の表面には、前記圧入完了位置での前記接点と前記基板側接点との接触を阻害しない領域にグラフェンを設けることを特徴としたプレスフィット端子。 A comp in which the through hole of the substrate is press-fitted into the through hole with the hole axis direction in the insertion direction, and both ends in the width direction are pressed against the inner peripheral surface of the through hole with the direction perpendicular to the insertion direction in the width direction. Has a liant part
The compliant portion has a pair of elastic portions that are arranged at intervals in the width direction and elastically deform by receiving a force from the inner peripheral surface of the through hole.
The elastic portion first contacts the contact that comes into contact with the substrate-side contact on the inner peripheral surface of the through hole at the press-fitting completion position with respect to the through hole, and first contacts the inner peripheral surface of the through hole when press-fitting into the through hole. It has a contact start point to be made to be formed, and a sliding portion provided between the contact start point and the contact point and slid on the inner peripheral surface of the through hole when press-fitted into the through hole.
A press-fit terminal characterized in that graphene is provided on the surface of the sliding portion in a region that does not hinder the contact between the contact and the substrate-side contact at the press-fitting completion position. 前記コンプライアント部は、前記幅方向における大きさが前記スルーホールの孔径よりも大きい幅広領域と、前記幅方向における大きさが前記スルーホールの前記孔径よりも小さい幅狭領域と、を有し、
前記接点は、それぞれの前記弾性部における前記幅広領域部分に各々設け、
それぞれの前記弾性部における前記幅広領域と前記幅狭領域の境界点を前記接触開始点とすることを特徴とした請求項１に記載のプレスフィット端子。 The compliant portion has a wide region whose size in the width direction is larger than the hole diameter of the through hole, and a narrow region whose size in the width direction is smaller than the hole diameter of the through hole.
The contacts are provided in the wide region portion of each elastic portion.
The press-fit terminal according to claim 1, wherein a boundary point between the wide region and the narrow region in each elastic portion is set as the contact start point. スルーホールを有する基板と、
前記スルーホールに圧入されたプレスフィット端子と、
を備え、
前記プレスフィット端子は、前記スルーホールの孔軸方向を挿入方向にして前記スルーホールに圧入させ、かつ、前記挿入方向に対する直交方向を幅方向にして前記幅方向における両端を前記スルーホールの内周面に圧接させるコンプライアント部を有し、
前記コンプライアント部は、前記幅方向で互いに間隔を空けて配置され、かつ、前記スルーホールの前記内周面からの力を受けて弾性変形させる一対の弾性部を有し、
前記弾性部は、前記スルーホールに対する圧入完了位置で前記スルーホールの前記内周面の基板側接点に接触させる接点と、前記スルーホールへの圧入に際して前記スルーホールの前記内周面に最初に接触させる接触開始点と、前記接触開始点と前記接点との間に設け、前記スルーホールへの圧入に際して前記スルーホールの前記内周面に摺動させる摺動部と、を有し、
前記摺動部の表面には、前記圧入完了位置での前記接点と前記基板側接点との接触を阻害しない領域にグラフェンを設けることを特徴とした端子付き基板。 A substrate with through holes and
The press-fit terminal press-fitted into the through hole and
With
The press-fit terminal is press-fitted into the through hole with the hole axis direction of the through hole as the insertion direction, and both ends in the width direction are the inner circumference of the through hole with the direction orthogonal to the insertion direction as the width direction. It has a compliant part that is pressed against the surface,
The compliant portion has a pair of elastic portions that are arranged at intervals in the width direction and elastically deform by receiving a force from the inner peripheral surface of the through hole.
The elastic portion first contacts the contact that comes into contact with the substrate-side contact on the inner peripheral surface of the through hole at the press-fitting completion position with respect to the through hole, and first contacts the inner peripheral surface of the through hole when press-fitting into the through hole. It has a contact start point to be made to be formed, and a sliding portion provided between the contact start point and the contact point and slid on the inner peripheral surface of the through hole when press-fitted into the through hole.
A substrate with terminals characterized in that graphene is provided on the surface of the sliding portion in a region that does not hinder the contact between the contact and the substrate-side contact at the press-fitting completion position.
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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015528976A (en) * 2012-05-01 2015-10-01 タイコ・エレクトロニクス・コーポレイションＴｙｃｏ Ｅｌｅｃｔｒｏｎｉｃｓ Ｃｏｒｐｏｒａｔｉｏｎ Methods and applications for improving corrosion resistance of electrical connectors
WO2018056260A1 (en) * 2016-09-21 2018-03-29 矢崎総業株式会社 Electrical contact, connector, and method for producing electrical contact
JP2018073707A (en) * 2016-11-01 2018-05-10 株式会社デンソー Press-fit terminal and electronic device

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015528976A (en) * 2012-05-01 2015-10-01 タイコ・エレクトロニクス・コーポレイションＴｙｃｏ Ｅｌｅｃｔｒｏｎｉｃｓ Ｃｏｒｐｏｒａｔｉｏｎ Methods and applications for improving corrosion resistance of electrical connectors
WO2018056260A1 (en) * 2016-09-21 2018-03-29 矢崎総業株式会社 Electrical contact, connector, and method for producing electrical contact
JP2018073707A (en) * 2016-11-01 2018-05-10 株式会社デンソー Press-fit terminal and electronic device

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