JP5571034B2

JP5571034B2 - Press-fit terminal

Info

Publication number: JP5571034B2
Application number: JP2011119541A
Authority: JP
Inventors: 俊佑川合; 靖博曽根
Original assignee: Toyoda Iron Works Co Ltd
Current assignee: Toyoda Iron Works Co Ltd
Priority date: 2011-05-27
Filing date: 2011-05-27
Publication date: 2014-08-13
Anticipated expiration: 2031-05-27
Also published as: JP2012248423A

Description

本発明はプレスフィット端子に係り、特に、スルーホールに対する挿入不良が抑制されるとともに挿入荷重が比較的小さく、且つ振動等による抜け出しが適切に防止されるプレスフィット端子に関するものである。 The present invention relates to a press-fit terminal, and more particularly, to a press-fit terminal in which an insertion failure with respect to a through hole is suppressed, an insertion load is relatively small, and an escape due to vibration or the like is appropriately prevented.

各種の電気部品や電源等を電気的に接続するターミナル装置の接続端子として、はんだ付けを必要としないプレスフィット端子が提案されている。例えば特許文献１には、(a) 端子突出方向の中間部分に設けられ、幅方向の両端が基板のスルーホールの内壁面に弾性的に押圧されて電気的に接続される接続部と、(b) 端子突出方向において前記接続部の両側に設けられ、前記基板を位置決めするように前記幅方向の両側へ突き出している先端側拡幅部および基端側拡幅部と、(c) その先端側拡幅部から端子突出方向の先端側へ向かうに従って前記幅方向の両端までの幅寸法が徐々に小さくなる先細部と、(d) その先細部、前記先端側拡幅部、前記接続部、および前記基端側拡幅部に跨がって設けられた長手形状の中空部と、(e) その中空部によって分断された前記先細部を端子突出方向の先端側で一体に連結している先端連結部と、を有し、(f) 前記先端連結部側から前記スルーホール内に挿入され、前記先細部の途中でそのスルーホールと係合させられることにより、前記中空部の存在で前記幅方向の内側へ弾性変形させられるとともに、前記先端側拡幅部がそのスルーホールを通過させられて幅方向の外側へ弾性的に復帰させられることにより、前記接続部がスルーホールの内周面に押圧されて電気的に接続されるプレスフィット端子が記載されている。また、特許文献２には、上記先端側拡幅部および基端側拡幅部を備えていないものの、中空部が端子突出方向に開口しているプレスフィット端子が提案されている。 A press-fit terminal that does not require soldering has been proposed as a connection terminal of a terminal device that electrically connects various electrical components and a power source. For example, in Patent Document 1, (a) a connection portion provided at an intermediate portion in the terminal protruding direction and electrically connected by elastically pressing both ends in the width direction to the inner wall surface of the through hole of the substrate; b) a distal-side widened portion and a proximal-side widened portion provided on both sides of the connecting portion in the terminal projecting direction and projecting to both sides of the width direction so as to position the substrate; and (c) the distal-side widened portion A tapered detail in which the width dimension from both ends to the both ends in the width direction gradually decreases toward the distal end side in the terminal projecting direction, and (d) the distal detail, the distal end side widened portion, the connecting portion, and the proximal end A longitudinal hollow portion provided across the side widened portion, and (e) a distal end coupling portion that integrally couples the tapered portions divided by the hollow portion on the distal end side in the terminal protruding direction; (F) inserted into the through hole from the tip connecting portion side. By being engaged with the through-hole in the middle of the taper, it is elastically deformed inward in the width direction due to the presence of the hollow portion, and the tip side widened portion is allowed to pass through the through-hole. There is described a press-fit terminal in which the connecting portion is pressed and electrically connected to the inner peripheral surface of the through hole by being elastically returned to the outside in the width direction. Patent Document 2 proposes a press-fit terminal in which the hollow portion is open in the terminal protruding direction, although it does not include the distal end side widened portion and the proximal end widened portion.

特開２０００−２９４３３１号公報JP 2000-294331 A 特開２００５−１７４６５４号公報JP 2005-174654 A

しかしながら、このような従来のプレスフィット端子は、中空部によって弾性変形が許容されることによりスルーホール内に挿入されるとともに、弾性的に復帰させられることにより中空部の両側の接続部がスルーホールの内壁面に押圧されるため、特許文献２のように拡幅部が無い場合は勿論、特許文献１のように拡幅部が存在する場合でも必ずしも十分な位置決め強度が得られず、例えば車両用ターミナル装置に適用された場合に振動等によってスルーホールから抜け出す可能性があった。特許文献１の場合、先端側拡幅部と基端側拡幅部との間の位置決め寸法が基板の板厚よりも大きいため、その間で基板が振動して抜け出す可能性がある。拡幅部の幅寸法（幅方向への突出寸法）を大きくすれば抜け出し難くなるが、特に特許文献１のように端子先端が連結されている場合、大きな挿入荷重が必要になる。特許文献２のように端子先端が割れている場合、挿入荷重を比較的小さく維持できるが、スルーホール内への挿入時に僅かな位置ずれなどで端子先端が基板に干渉して挿入不良を生じる恐れがある。 However, such a conventional press-fit terminal is inserted into the through hole by allowing elastic deformation by the hollow portion, and the connecting portions on both sides of the hollow portion are inserted through the through hole by being elastically restored. Since there is no widened portion as in Patent Document 2, sufficient positioning strength cannot always be obtained even when the widened portion exists as in Patent Document 1, for example, a vehicle terminal. When applied to the device, there was a possibility of slipping out of the through hole due to vibration or the like. In the case of Patent Document 1, since the positioning dimension between the distal end side widened portion and the proximal end widened portion is larger than the thickness of the substrate, the substrate may vibrate and come out between them. If the width dimension of the widened portion (projection dimension in the width direction) is increased, it will be difficult to pull out, but particularly when the terminal ends are connected as in Patent Document 1, a large insertion load is required. When the terminal tip is cracked as in Patent Document 2, the insertion load can be kept relatively small, but the terminal tip may interfere with the substrate due to a slight misalignment during insertion into the through hole, which may cause poor insertion. There is.

本発明は以上の事情を背景として為されたもので、その目的とするところは、はんだ付けを必要とすることなくスルーホールの内壁面に電気的に接続されるプレスフィット端子において、スルーホールに対する挿入不良が抑制されるとともに挿入荷重が比較的小さく、且つ振動等による抜け出しが適切に防止されるようにすることにある。 The present invention has been made against the background of the above circumstances, and the object of the present invention is to provide a press-fit terminal that is electrically connected to the inner wall surface of the through-hole without requiring soldering. An object of the present invention is to prevent insertion failure and to prevent the insertion load from being relatively small, and to prevent the removal due to vibration or the like.

かかる目的を達成するために、第１発明は、金属板材にて構成されており、基板に設けられた円形断面のスルーホール内を挿通させられるとともに、端子突出方向の中間部分がそのスルーホールの内壁面に接触させられて電気的に接続されるプレスフィット端子であって、(a) 前記金属板材の板厚方向へ膨出するように湾曲させられ、前記突出方向へ伸長するように弾性変形させられて前記スルーホール内を通過させられるとともに、反対側へ突き出して弾性復帰させられる際にそのスルーホールの開口周縁部に係止される先端係止部と、(b) その先端係止部よりも基端側において、前記プレスフィット端子の中心線Ｓ上に設けられ、その先端係止部に続いて前記スルーホールの中心線と平行な姿勢でそのスルーホール内に挿入されるとともに、そのスルーホールの内壁面に接触させられて電気的に接続される接続部と、(c) その接続部よりも基端側に設けられるとともにその接続部よりも幅寸法が大きく、前記スルーホールに挿入されることなく前記基板に当接させられ、そのスルーホールを通過して反対側に係止される前記先端係止部との間でその基板を弾性的に挟持して位置決めする当接部と、を有し、且つ、(d) 前記先端係止部は、(d-1) 前記プレスフィット端子の中心線Ｓ上に位置し、その中心線Ｓと平行に突き出すとともに前記金属板材の幅寸法が徐々に狭くなる先細形状の先端導入部と、(d-2) その先端導入部に連続して設けられ、前記金属板材の板厚方向へ膨出するように傾斜させられ、前記スルーホールに挿入される際にそのスルーホールの開口周縁部に係合させられることにより、前記先端係止部が前記突出方向へ伸長するように弾性変形させる第１傾斜部と、(d-3) その第１傾斜部よりも大きな傾斜角度で逆方向へ傾斜させられて、その第１傾斜部と前記接続部とを接続するとともに、その第１傾斜部が前記スルーホールを通過して前記先端係止部が弾性復帰させられる際にそのスルーホールの開口周縁部に係止され、前記当接部との間で前記基板を弾性的に挟持する第２傾斜部と、を備えているとともに、(d-4) 前記スルーホールの開口周縁部に係合させられる前記第１傾斜部の途中から前記先端導入部を含めて前記先細形状とされていることを特徴とする。 In order to achieve such an object, the first invention is made of a metal plate material, and is inserted through a through hole having a circular cross section provided in the substrate, and an intermediate portion in the terminal protruding direction is the through hole. A press-fit terminal that is brought into contact with and electrically connected to the inner wall surface, and (a) is bent so as to bulge in the plate thickness direction of the metal plate material, and elastically deformed so as to extend in the protruding direction. A tip locking portion that is allowed to pass through the through-hole and that is locked to the opening peripheral edge of the through-hole when protruding to the opposite side and elastically restored, and (b) the tip locking portion Oite proximal to the said provided on the center line S of the press-fit terminal, while being inserted into the through hole following its tip engaging portion in a posture parallel to the center line of the through hole (C) a connecting portion that is in contact with and electrically connected to the inner wall surface of the through hole; and (c) is provided on the base end side of the connecting portion and has a width that is larger than the connecting portion; A contact portion that is brought into contact with the substrate without being inserted, and that elastically holds and positions the substrate between the front end locking portion that passes through the through hole and is locked to the opposite side. And (d) the tip engaging portion is (d-1) located on the center line S of the press-fit terminal, protruding in parallel with the center line S, and the width of the metal plate material (D-2) provided continuously to the tip introduction portion, and inclined so as to bulge in the plate thickness direction of the metal plate material, the through hole It can be engaged with the opening edge of the through hole when inserted into the A first inclined portion that elastically deforms so that the distal end locking portion extends in the protruding direction, and (d-3) is inclined in the opposite direction at a larger inclination angle than the first inclined portion, The first inclined portion is connected to the connecting portion, and the first inclined portion passes through the through hole and is locked to the opening peripheral portion of the through hole when the tip locking portion is elastically restored. And (d-4) the first slope that is engaged with the opening peripheral edge of the through hole. It is characterized by the said taper shape including the said front-end | tip introduction part from the middle of the part.

第２発明は、第１発明のプレスフィット端子において、(a) 前記接続部は、横断面が矩形の平板形状を成しており、前記スルーホールの中心線と平行な姿勢でそのスルーホール内に挿入されることにより、前記横断面の稜線部分がそのスルーホールの内壁面に接触して電気的に接続されるとともに、その横断面の対角線寸法がそのスルーホールの径寸法よりも大きく、そのスルーホール内に圧入されることを特徴とする。 The second invention is the press-fit terminal according to the first invention. (A) The connecting portion has a flat plate shape with a rectangular cross section, and is in the through hole in a posture parallel to the center line of the through hole. in the Rukoto inserted, are electrically connected ridge portion of the cross section in contact with the inner wall surface of the through hole, larger than the diagonal dimension of the cross section diameter of the through hole, the It is characterized by being press-fitted into the through hole.

このようなプレスフィット端子においては、板厚方向へ膨出するように湾曲させられた先端係止部と、接続部よりも幅寸法が大きくて基板に当接させられる当接部との間で、その基板を弾性的に挟持して位置決めするため、車両用ターミナル装置等に適用された場合でも、振動などでスルーホールから抜け出すことが適切に防止される。先端係止部は、板厚方向へ湾曲させられたものであるため、その湾曲形状を適当に設定することにより、スルーホール内への挿入荷重の増加を抑制しつつスルーホールからの抜け出しが確実に防止されるようにすることができる。また、スルーホールに挿入される先端係止部は、金属板材を所定形状に曲げ加工するだけで良いため、先端が割れている場合に比較してスルーホール内へ適切に挿入でき、位置ずれなどによる挿入不良が抑制される。 In such a press-fit terminal, between the front end locking portion that is curved so as to bulge in the plate thickness direction, and the contact portion that is larger in width than the connection portion and is brought into contact with the substrate. Since the substrate is elastically sandwiched and positioned, even when applied to a vehicle terminal device or the like, it is appropriately prevented from coming out of the through hole due to vibration or the like. Since the tip locking part is curved in the thickness direction, setting the curved shape appropriately ensures that the insertion load into the through hole is suppressed and that the through hole is securely pulled out. Can be prevented. In addition, the tip locking part inserted into the through hole only needs to bend the metal plate into a predetermined shape, so that it can be properly inserted into the through hole compared to when the tip is cracked, misalignment, etc. Insertion failure due to is suppressed.

一方、上記先端係止部は、中心線Ｓ上において中心線Ｓと平行に突き出す先細形状の先端導入部を備えているため、スルーホールに対する挿入不良が一層適切に抑制される。また、比較的傾斜が小さい先端側の第１傾斜部と、比較的傾斜が大きい第２傾斜部とを有し、傾斜が小さい第１傾斜部がスルーホールの開口周縁部に係合させられることにより、先端係止部が突出方向へ伸長するように弾性変形させられてそのスルーホール内を通過させられるため、比較的小さな挿入荷重でスルーホール内を挿通させることができる。そして、その第１傾斜部がスルーホールを通過して先端係止部が弾性復帰させられる際に、傾斜が大きい第２傾斜部がスルーホールの開口周縁部に係止され、前記当接部との間で基板を弾性的に挟持するため、振動等に拘らず確実に抜け出しが防止されるようにすることができる。 On the other hand, since the tip locking portion includes a tapered tip introduction portion that protrudes in parallel with the center line S on the center line S, poor insertion into the through hole is more appropriately suppressed. In addition, the first inclined portion on the tip side having a relatively small inclination and the second inclined portion having a relatively large inclination are engaged with the first inclined portion having a small inclination on the opening peripheral edge of the through hole. Thus, the tip locking portion is elastically deformed so as to extend in the protruding direction and is allowed to pass through the through hole, so that the through hole can be inserted with a relatively small insertion load. Then, when the first inclined portion passes through the through hole and the tip locking portion is elastically restored, the second inclined portion having a large inclination is locked to the opening peripheral edge portion of the through hole, and the contact portion and Since the substrate is elastically sandwiched between the two, it is possible to reliably prevent the substrate from coming out regardless of vibration or the like.

第２発明では、前記接続部が、矩形断面の平板形状を成しており、その矩形断面の四隅の稜線部分が断面円形のスルーホールの内壁面に接触して電気的に接続されるとともに、その矩形断面の対角線寸法がそのスルーホールの径寸法よりも大きく、そのスルーホール内に圧入されるようになっているため、単純な形状で電気的な接続状態を確実に確保することができる。特に、矩形断面の四隅の稜線部分が接続部の全長に亘ってスルーホールの内壁面に接触させられるため、弾性変形などで部分的に接触させる場合に比較して高い導電性能が得られる。 In the second invention, the connecting portion has a flat plate shape with a rectangular cross section, and the ridge line portions at the four corners of the rectangular cross section are in contact with and electrically connected to the inner wall surface of the through hole having a circular cross section. Since the diagonal dimension of the rectangular cross section is larger than the diameter dimension of the through hole and is press-fitted into the through hole, an electrical connection state can be reliably ensured with a simple shape. In particular, since the ridges at the four corners of the rectangular cross section are brought into contact with the inner wall surface of the through hole over the entire length of the connecting portion, high conductive performance can be obtained as compared with a case where the ridges are brought into partial contact by elastic deformation or the like.

本発明が適用された多数のプレスフィット端子を有するターミナル装置の一例を説明する図で、(a) は全体の斜視図、(b) はスルーホールに挿入されて接続された状態のプレスフィット端子の側面図、(c) は(b) の左側から見た正面図、(d) は(c) におけるID−ID断面の拡大図である。BRIEF DESCRIPTION OF THE DRAWINGS It is a figure explaining an example of the terminal device which has many press fit terminals to which this invention was applied, (a) is a whole perspective view, (b) is a press fit terminal of the state inserted and connected to the through hole. (C) is a front view seen from the left side of (b), and (d) is an enlarged view of the ID-ID cross section in (c). 図１のターミナル装置に基板を接続する際の斜視図で、(a) は接続前、(b) は接続後の状態である。It is a perspective view at the time of connecting a board | substrate to the terminal device of FIG. 1, (a) is the state before a connection, (b) is the state after a connection. プレスフィット端子が基板のスルーホールに挿入されて接続される際の形状変化を説明する図である。It is a figure explaining the shape change at the time of a press fit terminal being inserted and connected to the through hole of a board | substrate. プレスフィット端子の当接部よりも先の部分を拡大して示す側面図である。It is a side view which expands and shows the part ahead of the contact part of a press fit terminal. 図１(a) のターミナル装置の製造工程を説明する図である。It is a figure explaining the manufacturing process of the terminal device of Fig.1 (a).

本発明のプレスフィット端子は、複数のプレスフィット端子が互いに近接して配置され、基板に設けられた複数のスルーホールに対して同時に挿入されて接続されるターミナル装置に好適に適用されるが、単一のプレスフィット端子にも適用され得る。ターミナル装置は、例えば車両に搭載される電気機器や電源等に用いられる場合、車両走行時の振動等によって基板から抜け出して外れる可能性があるため、本発明が適用されることによりその脱落が好適に抑制される。 The press-fit terminal of the present invention is preferably applied to a terminal device in which a plurality of press-fit terminals are arranged close to each other and are simultaneously inserted and connected to a plurality of through holes provided in the substrate. It can also be applied to a single press-fit terminal. For example, when the terminal device is used for an electric device or a power source mounted on a vehicle, the terminal device may come off from the board due to vibration or the like when the vehicle travels. To be suppressed.

プレスフィット端子は、銅板等の導電性の金属板材を用いてプレスによる打ち抜き加工等を主体として製造できるが、切削加工や研削加工を用いて製造しても良い。必要に応じて表面にＮｉ（ニッケル）メッキやＳｎ（錫）メッキ等の導電性被膜を設けることも可能である。 The press-fit terminal can be manufactured mainly by punching with a press using a conductive metal plate material such as a copper plate, but may be manufactured by using cutting or grinding. If necessary, a conductive film such as Ni (nickel) plating or Sn (tin) plating may be provided on the surface.

基板のスルーホールの内周面には、Ｃｕ（銅）メッキや銅箔、Ｓｎ（錫）メッキ等の導電性被膜、或いは導電性筒部材が設けられ、基板の表面に設けられたプリント配線等の電気回路に接続されているとともに、プレスフィット端子の接続部が押圧されることにより電気的に接続される。 The inner peripheral surface of Suruho Le substrate, Cu (copper) plating and copper foil, Sn (tin) plating the conductive coating, or a conductive tubular member is provided, the printed wiring or the like provided on the surface of the substrate In addition to being connected to the electrical circuit, the connection part of the press-fit terminal is electrically connected by being pressed.

接続部の幅方向の両端でスルーホールに接触させられる部分は、スルーホールの内周面に面接触させられるように、その内周面形状に対応する円弧等とすることもできるが、例えば円形穴のスルーホールに対して横断面が矩形の接続部を採用し、その矩形断面の角部（稜線部分）がスルーホールの内周面に対して線接触させられるものでも良い。 The portion that is brought into contact with the through hole at both ends in the width direction of the connecting portion can be an arc corresponding to the inner peripheral surface shape so as to be in surface contact with the inner peripheral surface of the through hole. cross section with respect to the through hole of the hole adopts a rectangular connecting portion, yet good those corners of the rectangular cross-section (ridge portion) is brought into line contact with the inner peripheral surface of the through hole.

当接部が基板に当接させられた状態で先端係止部がスルーホールの開口周縁部に係止されるように、その当接部と先端係止部との間の接続部の長さ寸法は基板の板厚よりも小さい寸法に設定される。それ等の先端係止部、接続部、および当接部は、端子の突出方向において互いに接続されるように連続して設けることが望ましい。 The length of the connecting portion between the abutting portion and the tip locking portion so that the tip locking portion is locked to the opening peripheral edge of the through hole in a state where the abutting portion is in contact with the substrate The dimension is set to a dimension smaller than the thickness of the substrate. It is desirable that the tip locking portion, the connection portion, and the contact portion are continuously provided so as to be connected to each other in the protruding direction of the terminal.

以下、本発明の実施例を、図面を参照しつつ詳細に説明する。
図１の(a) は、本発明が適用された多数（実施例では５つ）のプレスフィット端子１０を備えているターミナル装置８を示す斜視図で、車両に搭載されるインバータ等の電気機器や電源などに用いられるものである。プレスフィット端子１０は、それぞれ導電性の金属板材がＬ字形に折り曲げられた長手板状の導電プレート１２の一端部に一体に設けられている。導電プレート１２は、本実施例では厚さ０．４ｍｍの銅板で、電解光沢Ｎｉメッキが施されており、一定の間隔で互いに近接して横に並んだ状態で合成樹脂製基台１４に一体的に固設されている。合成樹脂製基台１４はＬ字形状を成していて、多数の導電プレート１２の角部（折り曲げ部）をそれぞれ埋設した状態で一体的にインサート成形されており、合成樹脂製基台１４から上方へ突き出している部分がプレスフィット端子１０として機能する。導電プレート１２の他端部側は、一方の表面（上面）が合成樹脂製基台１４の表面に露出させられ、所定の接続端子が振動溶着などで一体的に接続されるボンディング部１６として用いられる。 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1A is a perspective view showing a terminal device 8 having a large number (five in the embodiment) of press-fit terminals 10 to which the present invention is applied, and is an electric device such as an inverter mounted on a vehicle. It is used for power supplies. The press-fit terminals 10 are integrally provided at one end of a long plate-like conductive plate 12 in which a conductive metal plate is bent in an L shape. In this embodiment, the conductive plate 12 is a copper plate having a thickness of 0.4 mm, which is subjected to electrolytic luster Ni plating, and is integrated with the synthetic resin base 14 in a state in which the conductive plate 12 is arranged side by side in close proximity to each other. It is fixed. The synthetic resin base 14 has an L-shape, and is integrally insert-molded in a state in which corners (folded portions) of a large number of conductive plates 12 are embedded. The portion protruding upward functions as the press-fit terminal 10. The other end portion side of the conductive plate 12 is used as a bonding portion 16 in which one surface (upper surface) is exposed on the surface of the synthetic resin base 14 and predetermined connection terminals are integrally connected by vibration welding or the like. It is done.

上記ターミナル装置８は、図２に示すようにプリント配線基板等の基板２０が、プレスフィット端子１０の突出方向（図２の上方）から相対的に接近させられることにより、その基板２０に電気的に接続される。図２の(a) は接続前の状態で、(b) は接続後の状態であり、基板２０には、多数のプレスフィット端子１０に対応して多数のスルーホール２２が設けられており、プレスフィット端子１０はそれ等のスルーホール２２に挿入されるだけで、はんだ等を必要とすることなく電気的に接続される。スルーホール２２は円形断面で、その内周面にはＣｕ（銅）メッキや銅箔、Ｓｎ（錫）メッキ等の導電性被膜、或いは導電性筒部材が設けられているとともに、基板２０の表面に設けられたプリント配線等の電気配線２４に接続されており、プレスフィット端子１０はそれ等の電気配線２４に電気的に接続される。 As shown in FIG. 2, the terminal device 8 is electrically connected to the board 20 when the board 20 such as a printed wiring board is relatively moved from the protruding direction of the press-fit terminal 10 (upward in FIG. 2). Connected to. 2A shows a state before connection, and FIG. 2B shows a state after connection. The substrate 20 is provided with a large number of through holes 22 corresponding to the large number of press-fit terminals 10. The press-fit terminal 10 is electrically inserted without requiring solder or the like only by being inserted into the through hole 22 thereof. The through hole 22 has a circular cross section, and an inner peripheral surface thereof is provided with a conductive coating such as Cu (copper) plating, copper foil, Sn (tin) plating, or a conductive cylinder member, and the surface of the substrate 20. The press-fit terminal 10 is electrically connected to the electrical wiring 24 such as a printed wiring.

図５は、このようなターミナル装置８の製作方法の一例を説明する概略図で、(a) はタイバー１８により両端が連結された多数の導電プレート１２の外形抜きをプレス加工によって行う外形抜き工程、(b) は上記導電プレート１２を略直角に曲げ加工する曲げ工程、(c) は、合成樹脂製基台１４をインサート成形する樹脂成形工程、(d) はタイバー１８を切断するタイバーカット工程であり、これによりターミナル装置８が得られる。(a) 〜(d) における左側の図は正面図で、右側の図は右側面図であるが、各図の縦横寸法の比率は必ずしも正確な割合で示したものではない。 FIG. 5 is a schematic diagram for explaining an example of a manufacturing method of such a terminal device 8. FIG. 5 (a) is an outline drawing step in which a plurality of conductive plates 12 connected at both ends by tie bars 18 are drawn by pressing. (B) is a bending process for bending the conductive plate 12 at a substantially right angle, (c) is a resin molding process for insert molding the synthetic resin base 14, and (d) is a tie bar cutting process for cutting the tie bar 18. Thus, the terminal device 8 is obtained. The left figure in (a) to (d) is a front view, and the right figure is a right side figure, but the ratio of the vertical and horizontal dimensions in each figure is not necessarily an exact ratio.

図１の(b) は、スルーホール２２に挿入されて接続された状態のプレスフィット端子１０の側面図で、(c) は(b) の左側から見た正面図、(d) は(c) におけるID−ID断面の拡大図である。これ等の図から明らかなように、プレスフィット端子１０は、スルーホール２２内を挿通させられるとともに、端子突出方向（図１(b) 、(c) における上方）の中間部分がスルーホール２２の内壁面に接触させられて電気的に接続される。中間部分には、図１(d) から明らかなように横断面が矩形すなわち長方形で、その幅寸法Ａが一定で中実の平板形状を成す接続部３０が、プレスフィット端子１０の中心線Ｓ上に設けられており、その接続部３０は、スルーホール２２の中心線と平行な姿勢でスルーホール２２内に挿入され、図１(d) に示すように矩形断面の四隅の稜線部分がスルーホール２２の内壁面に接触して電気的に接続される。本実施例では、挿入（接続）前の矩形断面の対角線寸法ｄがスルーホール２２の径寸法Ｄよりも大きく、接続部３０はスルーホール２２内に圧入されるようになっている。接続部３０の幅寸法をＡ、板厚をＢ、プレス打ち抜き加工によるダレＲの寸法（半径）をＣとすると、対角線寸法ｄは次式(1) で表され、ｄ＞Ｄとなるように板厚Ｂに応じて幅寸法Ａが定められる。
ｄ＝√｛（Ａ−Ｃ）²＋（Ｂ−Ｃ）²｝＋Ｃ・・・(1) (B) in FIG. 1 is a side view of the press-fit terminal 10 inserted and connected to the through hole 22, (c) is a front view seen from the left side of (b), and (d) is (c). FIG. 4 is an enlarged view of an ID-ID section in FIG. As is apparent from these drawings, the press-fit terminal 10 is inserted through the through hole 22 and the intermediate portion in the terminal protruding direction (upward in FIGS. 1B and 1C) is the through hole 22. It is brought into contact with the inner wall surface and electrically connected. As is clear from FIG. 1 (d), the intermediate portion has a rectangular cross section, that is, a rectangular shape, and a solid flat plate shape having a constant width dimension A, and a center line S of the press-fit terminal 10. The connecting portion 30 is inserted into the through-hole 22 in a posture parallel to the center line of the through-hole 22, and the ridges at the four corners of the rectangular cross section are shown in FIG. 1 (d). The inner wall surface of the hole 22 is contacted and electrically connected. In this embodiment, the diagonal dimension d of the rectangular cross section before insertion (connection) is larger than the diameter dimension D of the through hole 22, and the connection portion 30 is press-fitted into the through hole 22. When the width dimension of the connecting portion 30 is A, the plate thickness is B, and the dimension (radius) of the sag R by press punching is C, the diagonal dimension d is expressed by the following equation (1), and d> D is satisfied. The width dimension A is determined according to the plate thickness B.
d = √ {(AC) ² + (BC) ² } + C (1)

上記接続部３０よりも基端側、すなわち図１(b) 、(c) における下方側には、接続部３０よりも幅寸法が大きく、スルーホール２２に挿入されることなく基板２０の下面に当接させられる当接部３２が、接続部３０に連続して設けられている。また、その当接部３２よりも更に基端側には、板厚方向へ湾曲させられたクッション部３４が設けられている。 A width dimension is larger than the connection portion 30 on the base end side from the connection portion 30, that is, a lower side in FIGS. 1B and 1C. A contact portion 32 to be contacted is provided continuously to the connection portion 30. Further, a cushion portion 34 that is curved in the thickness direction is provided further on the proximal end side than the contact portion 32 .

一方、接続部３０よりも先端側には、板厚方向（図１(b) では右方向）へ膨出するように湾曲させられた先端係止部３６が接続部３０に連続して設けられている。この先端係止部３６は、図３の(c) に示すようにプレスフィット端子１０の突出方向（図３(c) の上方）へ伸長するように弾性変形しつつスルーホール２２内を通過させられるとともに、図３の(d) に示すように反対側へ突き出して弾性復帰させられる際にスルーホール２２の上側の開口周縁部に係止され、基板２０の下面に当接させられる当接部３２との間で基板２０を弾性的に挟持して位置決めする。図４は、プレスフィット端子１０の当接部３２よりも先端側部分を拡大して示した図で、接続部３０の長さ寸法Ｅは基板２０の板厚Ｊ（図１(b) 参照）よりも小さく、且つ当接部３２から先端係止部３６の膨出頂点までの長さ寸法Ｋは板厚Ｊよりも大きく、これ等の長さ寸法ＥとＫとの間の部分が、完全に弾性復帰する前にスルーホール２２の開口周縁部に係止されることにより、当接部３２と先端係止部３６との間で基板２０が弾性的に挟持される。先端係止部３６の曲げ幅寸法Ｆはスルーホール２２の径寸法Ｄよりも大きく、スルーホール２２を通過して弾性復帰させられる際にそのスルーホール２２の開口周縁部に確実に係止される。 On the other hand, a distal end locking portion 36 that is curved so as to bulge in the thickness direction (rightward in FIG. 1B) is provided on the distal end side of the connection portion 30 continuously from the connection portion 30. ing. As shown in FIG. 3 (c), the tip locking portion 36 is allowed to pass through the through hole 22 while being elastically deformed so as to extend in the protruding direction of the press-fit terminal 10 (upward in FIG. 3 (c)). In addition, as shown in FIG. 3 (d), the abutting portion that is locked to the opening peripheral edge on the upper side of the through hole 22 and is brought into contact with the lower surface of the substrate 20 when it is elastically restored by protruding to the opposite side. The substrate 20 is elastically sandwiched between and positioned. 4 is an enlarged view of the front end side portion of the press-fit terminal 10 with respect to the contact portion 32. The length dimension E of the connection portion 30 is the thickness J of the substrate 20 (see FIG. 1B). And the length dimension K from the contact portion 32 to the bulging apex of the tip locking portion 36 is larger than the plate thickness J, and the portion between these length dimensions E and K is completely The substrate 20 is elastically held between the contact portion 32 and the distal end locking portion 36 by being locked to the peripheral edge of the opening of the through hole 22 before the elastic recovery. The bending width dimension F of the distal end locking portion 36 is larger than the diameter dimension D of the through hole 22, and when it is elastically restored after passing through the through hole 22, it is reliably locked to the opening peripheral edge of the through hole 22. .

また、上記先端係止部３６は、前記接続部３０の延長線上すなわち中心線Ｓ上に位置する先細形状（図１(c) 参照）の先端導入部４０と、その先端導入部４０に連続して設けられて板厚方向へ膨出するように傾斜角βで傾斜させられた第１傾斜部４２と、その第１傾斜部４２よりも大きな傾斜角αで逆方向へ傾斜させられて第１傾斜部４２と接続部３０とを接続する第２傾斜部４４とを備えている。第２傾斜部４４は、厳密には接続部３０に滑らかに接続される円弧と、第１傾斜部４２に滑らかに接続される円弧とから成るもので、全体として第１傾斜部４２と接続部３０を接続する傾斜部として機能し、傾斜角αは第１傾斜部４２と接続部３０との間の平均傾斜角に相当する。また、先細形状は、図１の(c) から明らかなように導電プレート１２の幅寸法を徐々に狭くしたもので、中心線Ｓと平行な先端導入部４０だけでなく、第１傾斜部４２の途中から先細形状とされている。 The distal end locking portion 36 is continuous with the distal end introducing portion 40 having a tapered shape (see FIG. 1 (c)) located on the extension line of the connecting portion 30, that is, on the center line S, and the distal end introducing portion 40. And a first inclined portion 42 that is inclined at an inclination angle β so as to bulge in the plate thickness direction, and is inclined in the opposite direction at an inclination angle α larger than the first inclined portion 42. A second inclined portion 44 that connects the inclined portion 42 and the connecting portion 30 is provided. Strictly speaking, the second inclined portion 44 includes an arc smoothly connected to the connecting portion 30 and an arc smoothly connected to the first inclined portion 42, and the first inclined portion 42 and the connecting portion as a whole. 30 functions as an inclined portion that connects 30, and the inclination angle α corresponds to an average inclination angle between the first inclined portion 42 and the connecting portion 30. Further, the taper shape is obtained by gradually reducing the width dimension of the conductive plate 12 as is apparent from FIG. 1 (c), and includes not only the tip introduction portion 40 parallel to the center line S but also the first inclined portion 42. It is tapered from the middle.

図３は、プレスフィット端子１０が基板２０のスルーホール２２内に挿入されて接続される際の先端係止部３６の形状変化を示す図で、(a) は挿入前で、(b) は先端導入部４０がスルーホール２２内に挿入されて第１傾斜部４２がスルーホール２２の開口周縁部に係合させられるようになった状態である。先端導入部４０は先細形状を成しているため、位置ずれなどによる挿入不良が抑制される。そして、(b) のように第１傾斜部４２がスルーホール２２の開口周縁部に係合させられるようになると、プレスフィット端子１０が更にスルーホール２２内に挿入されることにより、先端係止部３６は、図３の(c) に示すように突出方向へ伸長するように弾性変形させられて偏平になりながらスルーホール２２内を通過させられる。先端係止部３６の先細形状以外の部分の幅寸法や板厚は、接続部３０における幅寸法Ａおよび板厚Ｂと略同じ寸法であるが、スルーホール２２を通過する際の変形を容易にするために、必要に応じて幅寸法Ａよりも小さくしたり板厚Ｂよりも薄くしたりすることも可能である。 FIGS. 3A and 3B are diagrams showing changes in the shape of the tip locking portion 36 when the press-fit terminal 10 is inserted into the through-hole 22 of the substrate 20 and connected thereto. FIG. 3A is before insertion, and FIG. The tip introduction part 40 is inserted into the through hole 22 and the first inclined part 42 is engaged with the opening peripheral edge of the through hole 22. Since the tip introduction part 40 has a tapered shape, insertion failure due to misalignment or the like is suppressed. When the first inclined portion 42 is engaged with the peripheral edge of the opening of the through hole 22 as shown in (b), the press-fit terminal 10 is further inserted into the through hole 22 to lock the tip. As shown in FIG. 3C, the portion 36 is elastically deformed so as to extend in the protruding direction and is allowed to pass through the through hole 22 while being flattened. The width dimension and the plate thickness of the portion other than the tapered shape of the distal end locking portion 36 are substantially the same as the width dimension A and the plate thickness B in the connection portion 30, but can be easily deformed when passing through the through hole 22. Therefore, it is possible to make it smaller than the width dimension A or thinner than the plate thickness B as required.

第１傾斜部４２がスルーホール２２を通過して反対側へ突き出すと、先端係止部３６は第２傾斜部４４がスルーホール２２の開口周縁部に摺接しつつ徐々に弾性復帰させられ、(d) に示すように前記当接部３２が基板２０の下面に当接させられてそれ以上の挿入が阻止されることにより、未だスルーホール２２の開口周縁部に弾性的に係止されている第２傾斜部４４と当接部３２との間で基板２０が挟持される。(c) に示すように先端係止部３６がスルーホール２２を通過する際の変形で永久歪（塑性変形）を生じる場合でも、スルーホール２２の通過に伴って第２傾斜部４４がスルーホール２２の開口周縁部に係止されるだけの十分な弾性歪が残っていれば良い。第２傾斜部４４の傾斜角αは比較的大きく、特に接続部３０の近傍部分でスルーホール２２に係止させられる側の湾曲形状は、傾斜角αよりも大きな傾斜を有するため、大きな位置決め強度（引抜き強度）が得られ、プレスフィット端子１０の抜け出しが適切に抑制される。 When the first inclined portion 42 passes through the through hole 22 and protrudes to the opposite side, the tip locking portion 36 is gradually elastically restored while the second inclined portion 44 is in sliding contact with the opening peripheral edge of the through hole 22 ( As shown in d), the contact portion 32 is brought into contact with the lower surface of the substrate 20 to prevent further insertion, so that it is still elastically locked to the peripheral edge of the through hole 22. The substrate 20 is sandwiched between the second inclined portion 44 and the contact portion 32. (c) As shown in (c), even when the permanent engagement (plastic deformation) is caused by the deformation when the tip locking portion 36 passes through the through hole 22, the second inclined portion 44 moves through the through hole 22 as the through hole 22 passes. It is sufficient that sufficient elastic strain remains to be locked to the peripheral edge of the opening 22. The inclination angle α of the second inclined portion 44 is relatively large. In particular, the curved shape on the side that is locked to the through hole 22 in the vicinity of the connecting portion 30 has a larger inclination than the inclination angle α, and therefore has a large positioning strength. (Pullout strength) is obtained, and pull-out of the press-fit terminal 10 is appropriately suppressed.

このように本実施例のプレスフィット端子１０においては、板厚方向へ膨出するように湾曲させられた先端係止部３６と、接続部３０よりも幅寸法が大きくて基板２０に当接させられる当接部３２との間で、その基板２０を弾性的に挟持して位置決めするため、車両走行時の振動などでプレスフィット端子１０がスルーホール２２から抜け出すことが適切に防止される。先端係止部３６は、板厚方向へ湾曲させられたものであるため、その湾曲形状を適当に設定することにより、スルーホール２２内への挿入荷重の増加を抑制しつつスルーホール２２からの抜け出しが確実に防止されるようにすることができる。 As described above, in the press-fit terminal 10 of this embodiment, the front end locking portion 36 that is curved so as to bulge in the plate thickness direction and the width dimension larger than the connection portion 30 are brought into contact with the substrate 20. Since the substrate 20 is elastically sandwiched and positioned between the contact portion 32 and the contact portion 32, the press-fit terminal 10 can be appropriately prevented from coming out of the through hole 22 due to vibration during vehicle travel. Since the distal end locking portion 36 is curved in the plate thickness direction, by appropriately setting the curved shape, the increase in insertion load into the through hole 22 can be suppressed while suppressing the increase in insertion load from the through hole 22. It is possible to reliably prevent the slipping out.

また、スルーホール２２に挿入される先端係止部３６は、金属板材を所定形状に曲げ加工するだけで良いため、先端が割れている場合に比較してスルーホール２２内へ適切に挿入でき、位置ずれなどによる挿入不良が抑制される。本実施例では、先端係止部３６が先細形状の先端導入部４０を備えているため、スルーホール２２に対する挿入不良が一層適切に抑制される。 Moreover, since the front end locking part 36 inserted into the through hole 22 only needs to bend the metal plate into a predetermined shape, it can be appropriately inserted into the through hole 22 compared to when the front end is cracked, Insertion failure due to misalignment or the like is suppressed. In the present embodiment, since the distal end locking portion 36 includes the tapered distal end introducing portion 40, the insertion failure with respect to the through hole 22 is more appropriately suppressed.

また、本実施例の先端係止部３６は、比較的傾斜が小さい先端側の第１傾斜部４２と、比較的傾斜が大きい第２傾斜部４４とを有し、傾斜が小さい第１傾斜部４２がスルーホール２２の開口周縁部に係合させられることにより、先端係止部３６が突出方向へ伸長するように弾性変形させられてそのスルーホール２２内を通過させられるため、比較的小さな挿入荷重でスルーホール２２内を挿通させることができる。そして、その第１傾斜部４２がスルーホール２２を通過して先端係止部３６が弾性復帰させられる際に、傾斜が大きい第２傾斜部４４がスルーホール２２の開口周縁部に係止され、当接部３２との間で基板２０を弾性的に挟持するため、振動等に拘らず確実に抜け出しが防止されるようにすることができる。本実施例では、傾斜角αよりも傾斜が大きい接続部３０の近傍部分でスルーホール２２に係止されるため、大きな位置決め強度（引抜き強度）が得られてプレスフィット端子１０の抜け出しが一層確実に防止される。 Further, the distal end locking portion 36 of the present embodiment has a first inclined portion 42 on the distal end side having a relatively small inclination and a second inclined portion 44 having a relatively large inclination, and the first inclined portion having a small inclination. Since 42 is engaged with the peripheral edge of the opening of the through hole 22, the distal end locking portion 36 is elastically deformed so as to extend in the protruding direction and is allowed to pass through the through hole 22. The through hole 22 can be inserted by a load. And when the 1st inclination part 42 passes through the through hole 22, and the front-end | tip latching | locking part 36 is elastically returned, the 2nd inclination part 44 with a big inclination is latched by the opening peripheral part of the through hole 22, Since the board | substrate 20 is clamped elastically between the contact parts 32, it can prevent coming out reliably irrespective of a vibration etc. In the present embodiment, since it is locked to the through hole 22 in the vicinity of the connecting portion 30 having a larger inclination than the inclination angle α, a large positioning strength (pullout strength) is obtained, and the press-fit terminal 10 is more reliably pulled out. To be prevented.

また、本実施例では、接続部３０が、矩形断面の平板形状を成しており、その矩形断面の四隅の稜線部分が断面円形のスルーホール２２の内壁面に接触して電気的に接続されるとともに、その矩形断面の対角線寸法ｄがそのスルーホール２２の径寸法Ｄよりも大きく、そのスルーホール２２内に圧入されるようになっているため、単純な形状で電気的な接続状態を確実に確保することができる。特に、矩形断面の四隅の稜線部分が接続部３０の全長に亘ってスルーホール２２の内壁面に接触させられるため、弾性変形などで部分的に接触させる場合に比較して高い導電性能が得られる。 Further, in this embodiment, the connecting portion 30 has a flat plate shape with a rectangular cross section, and the ridge lines at the four corners of the rectangular cross section are in contact with and electrically connected to the inner wall surface of the through hole 22 having a circular cross section. In addition, since the diagonal dimension d of the rectangular cross section is larger than the diameter dimension D of the through hole 22 and is press-fitted into the through hole 22, the electrical connection state is ensured with a simple shape. Can be secured. In particular, since the ridges at the four corners of the rectangular cross section are brought into contact with the inner wall surface of the through-hole 22 over the entire length of the connecting portion 30, high conductive performance can be obtained as compared with the case where the contact is partially made by elastic deformation or the like. .

因に、図１の(b) 、(c) に示すように基板２０のスルーホール２２に接続された本実施例のプレスフィット端子１０を強制的に引き抜く際の引抜き強度を調べたところ、１本当り２３．３Ｎであったのに対し、０〜２０００Ｈｚの周波数で５Ｇ、１１Ｇの加速度の振動を加えた場合にプレスフィット端子１０に掛かる抜け荷重は１本当り１０．８Ｎで、引抜き強度の方が十分に高くて抜け難いことが確認された。 Incidentally, as shown in FIGS. 1B and 1C, when the press-fit terminal 10 of this embodiment connected to the through hole 22 of the substrate 20 is forcibly pulled out, the pull-out strength is examined. Whereas it was 23.3N per wire, the unloading load applied to the press-fit terminals 10 when applying vibrations of 5G and 11G at a frequency of 0 to 2000 Hz was 10.8N per wire, It was confirmed that it was sufficiently high and difficult to escape.

以上、本発明の実施例を図面に基づいて詳細に説明したが、これはあくまでも一実施形態であり、本発明は当業者の知識に基づいて種々の変更，改良を加えた態様で実施することができる。 As mentioned above, although the Example of this invention was described in detail based on drawing, this is an embodiment to the last, and this invention implements in the aspect which added various change and improvement based on the knowledge of those skilled in the art. Can do.

１０：プレスフィット端子１２：導電プレート（金属板材）２０：基板２２：スルーホール３０：接続部３２：当接部３６：先端係止部４０：先端導入部４２：第１傾斜部４４：第２傾斜部Ｓ：端子中心線ｄ：対角線寸法Ｄ：スルーホールの径寸法 10: Press-fit terminal 12: Conductive plate (metal plate material) 20: Substrate 22: Through hole 30: Connection part 32: Abutting part 36: Tip locking part 40: Tip introducing part 42: First inclined part 44: Second Inclined part S: Terminal center line d: Diagonal dimension D: Diameter of through hole

Claims

It is made of a metal plate and can be inserted through a through-hole having a circular cross section provided on the substrate, and an intermediate portion in the terminal protruding direction is brought into contact with and electrically connected to the inner wall surface of the through-hole. A press-fit terminal,
When the metal plate is bent so as to bulge in the plate thickness direction, elastically deformed so as to extend in the protruding direction and allowed to pass through the through hole, and protrudes to the opposite side to be elastically restored. A tip locking portion locked to the opening peripheral edge of the through hole;
Oite proximal to the distal end engaging portion, said press-fit provided on the center line S of the terminal, the through holes following the tip engaging portion in a posture parallel to the center line of the through hole And a connecting portion that is brought into contact with and electrically connected to the inner wall surface of the through hole, and
It is provided on the base end side with respect to the connecting portion and has a width dimension larger than that of the connecting portion, is brought into contact with the substrate without being inserted into the through hole, passes through the through hole, and is engaged on the opposite side. An abutting portion for elastically holding and positioning the substrate between the tip locking portion to be stopped;
And the distal end locking portion is
A tapered tip introducing portion located on the center line S of the press-fit terminal, protruding in parallel with the center line S, and gradually narrowing the width dimension of the metal plate material;
Provided continuously to the tip introduction part, inclined so as to bulge in the thickness direction of the metal plate material, and engaged with the opening peripheral edge of the through hole when inserted into the through hole. Accordingly, the first inclined portion that elastically deforms so that the distal end locking portion extends in the protruding direction,
The first inclined portion is inclined in the opposite direction at an inclination angle larger than that of the first inclined portion to connect the first inclined portion and the connecting portion, and the first inclined portion passes through the through hole and is engaged with the tip end portion. A second inclined portion that is locked to the opening peripheral edge of the through-hole when the stopper is elastically restored and elastically sandwiches the substrate with the contact portion;
The press-fit terminal is characterized by having the tapered shape including the tip introduction part from the middle of the first inclined part engaged with the opening peripheral part of the through hole.

The connecting portion is cross-section is a rectangular flat plate shape, the by Rukoto is inserted into the through-hole in a posture parallel with the center line of the through-holes, ridge portions the through hole of the cross section 2. The device according to claim 1, wherein the diagonal dimension of the cross section is larger than the diameter dimension of the through hole and is press-fitted into the through hole. Press-fit terminal.