JP2010153291A

JP2010153291A - Terminal connection structure

Info

Publication number: JP2010153291A
Application number: JP2008332194A
Authority: JP
Inventors: Keiji Jinno; 圭史神野; Daisuke Sakurai; 大介櫻井
Original assignee: Yazaki Corp
Current assignee: Yazaki Corp
Priority date: 2008-12-26
Filing date: 2008-12-26
Publication date: 2010-07-08

Abstract

<P>PROBLEM TO BE SOLVED: To prevent metal burrs from occurring at a terminal by shortening a distance at which the terminal rubs against an inner face of a terminal retention hole, at insertion-fitting of the terminal into the terminal retention hole of a connector housing. <P>SOLUTION: The terminal connection structure consists of a terminal retention hole 14 fitted to a terminal retention wall 12 of the connector housing 10, and a terminal 20 fitted into the terminal retention hole 14. The terminal retention hole 14 is formed in a tapered hole narrowing down in a fitting-in direction of the terminal 20. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

本発明は、電気機器のコネクタハウジングに装着される端子の端子接続構造に関する。 The present invention relates to a terminal connection structure for terminals to be mounted on a connector housing of an electric device.

従来より、電気機器、例えば自動車に搭載される電装品等に相手側部品を電気的に接続するために、電気機器のコネクタハウジングに設けられた端子保持壁に電気機器の回路基板と接続される端子保持穴を形成し、この端子保持穴に相手側部品の回路基板と接続される端子を圧入して、端子保持穴に端子を取り付けることが行われる（例えば特許文献１の図７を参照）。 Conventionally, in order to electrically connect a counterpart component to an electrical device such as an electrical component mounted on an automobile, the circuit board of the electrical device is connected to a terminal holding wall provided in a connector housing of the electrical device. A terminal holding hole is formed, and a terminal connected to the circuit board of the counterpart component is press-fitted into the terminal holding hole, and the terminal is attached to the terminal holding hole (see, for example, FIG. 7 of Patent Document 1). .

特開２００２−２９１１３５号公報JP 2002-291135 A

ところで、上記端子は、一般に角断面または丸断面の線材からなり、端子を端子保持穴に圧入することによって、端子を端子保持穴に保持するための、端子の外周面と端子保持穴の内壁面との間の圧接力を得るため、端子圧入時に端子保持穴の内壁面との擦れにより端子の金属めっき或いは端子の母材が削れて、端子に金属バリが発生することが多々あった。端子に金属バリが発生すると、隣接した端子との間でショートを起こす虞があるので、時として端子接続部に対し入念な検査が必要とされる問題があった。 By the way, the terminal is generally made of a wire having a square or round cross section, and the terminal outer peripheral surface and the inner wall surface of the terminal holding hole for holding the terminal in the terminal holding hole by press-fitting the terminal into the terminal holding hole. In order to obtain a pressure contact force between the terminal and the terminal, the metal plating of the terminal or the base material of the terminal is scraped by rubbing with the inner wall surface of the terminal holding hole when the terminal is press-fitted, and a metal burr is often generated in the terminal. When metal burrs are generated at the terminals, there is a possibility that a short circuit may occur between adjacent terminals, and there is a problem that a careful inspection is sometimes required for the terminal connection portion.

本発明は、斯かる問題点に鑑みてなされたものであり、上記問題点を解決する端子接続構造を提供することを目的とする。 The present invention has been made in view of such problems, and an object thereof is to provide a terminal connection structure that solves the above problems.

本発明は、上記課題を解決すべく、以下に掲げる構成とした。
本発明の端子接続構造は、コネクタハウジングに設けられた端子保持穴と、前記端子保持穴に圧入される端子とからなる端子接続構造であって、前記端子保持穴を前記端子の圧入方向に縮径するテーパ穴を形成し、前記テーパ穴における少なくとも一部の領域と、前記端子が直接接触することを特徴とする。
本発明の端子接続構造は、前記端子保持穴の前記端子の圧入方向とは反対側の端子挿入端に、前記端子保持穴のテーパ角度より大きな角度のテーパを形成したことを特徴とする。
本発明の端子接続構造は、前記端子の先端部を先細りの案内部に形成するとともに、前記端子の前記案内部と前記端子の残余の胴部との境界部に丸面取りを施したことを特徴とする。 In order to solve the above problems, the present invention has the following configurations.
The terminal connection structure of the present invention is a terminal connection structure comprising a terminal holding hole provided in a connector housing and a terminal press-fitted into the terminal holding hole, and the terminal holding hole is contracted in the press-fitting direction of the terminal. A tapered hole having a diameter is formed, and at least a part of the tapered hole is in direct contact with the terminal.
The terminal connection structure of the present invention is characterized in that a taper having an angle larger than the taper angle of the terminal holding hole is formed at the terminal insertion end of the terminal holding hole opposite to the press-fitting direction of the terminal.
The terminal connection structure according to the present invention is characterized in that a tip end portion of the terminal is formed in a tapered guide portion, and a round chamfer is applied to a boundary portion between the guide portion of the terminal and a remaining trunk portion of the terminal. And

本発明によれば、コネクタハウジングの端子保持穴への端子の圧入時に、端子の端子保持穴の内壁面との擦れる距離を短くして、端子に金属バリが発生するのを防止することができる。 According to the present invention, when the terminal is press-fitted into the terminal holding hole of the connector housing, the rubbing distance with the inner wall surface of the terminal holding hole of the terminal can be shortened to prevent occurrence of metal burrs on the terminal. .

本発明に係る端子接続構造の実施形態について、図面を参照しながら説明する。 An embodiment of a terminal connection structure according to the present invention will be described with reference to the drawings.

図１は、本発明の端子接続構造が適用される電気機器の端子接続部を示す図である。 FIG. 1 is a diagram illustrating a terminal connection portion of an electrical apparatus to which the terminal connection structure of the present invention is applied.

図１に示すように、電気機器のコネクタハウジング１０は端子保持壁１２を備え、この端子保持壁１２に複数の端子保持穴１４が１段または複数段に形成されている。各端子保持穴１４は、導体１６によって電気機器の回路基板（図示せず）に接続されている。端子保持穴１４には、図１（ｂ）中の拡大図に示すように、相手側部品（図示せず）の端子ボード１８に設けられた対応する端子２０が圧入によって取り付けられ、端子２０は相手側部品の回路基板に接続されている。この端子２０は断面正方形の真直な角線材からなり、必要に応じて外周面に導電性金属のめっきが施されている。 As shown in FIG. 1, the connector housing 10 of the electric device includes a terminal holding wall 12, and a plurality of terminal holding holes 14 are formed in the terminal holding wall 12 in one or more stages. Each terminal holding hole 14 is connected to a circuit board (not shown) of an electrical device by a conductor 16. As shown in the enlarged view in FIG. 1B, corresponding terminals 20 provided on a terminal board 18 of a counterpart component (not shown) are attached to the terminal holding holes 14 by press-fitting. It is connected to the circuit board of the counterpart component. The terminal 20 is made of a straight square wire having a square cross section, and an outer peripheral surface is plated with a conductive metal as necessary.

端子２０は先端部まで同一断面寸法であってもよいが、本例では、端子保持穴１４に端子２０を挿入しやすくするために、図２に示すように、端子２０の先端部を先細りの案内部２０ａに形成している。この案内部２０ａは、端子２０の先端部を除く残余の胴部２０ｂから伸びる角錐台形状に形成されている。この端子２０の案内部２０ａとの境界部となる胴部２０ｂの前端縁２０ｃには、前端縁２０ｃによる端子保持穴１４の内壁面１４ａとのかじりをなくすために、丸面取りを施すことが好ましい。 Although the terminal 20 may have the same cross-sectional dimension up to the tip, in this example, in order to facilitate insertion of the terminal 20 into the terminal holding hole 14, the tip of the terminal 20 is tapered as shown in FIG. It forms in the guide part 20a. The guide portion 20 a is formed in a truncated pyramid shape extending from the remaining barrel portion 20 b excluding the tip portion of the terminal 20. The front end edge 20c of the body portion 20b, which is a boundary portion between the terminal 20 and the guide portion 20a, is preferably rounded to eliminate galling with the inner wall surface 14a of the terminal holding hole 14 by the front end edge 20c. .

端子保持穴１４は、端子２０の断面形状に対応して断面正方形に形成されている。この端子保持穴１４は、図２（ａ）に示すように、端子２０の圧入方向（図２（ｂ）に白抜きの矢印で示す）に縮径した先細りのテーパ穴に形成されている。したがって、案内部２０ａを先頭にして端子２０を端子挿入端１４ｂから端子保持穴１４に挿入して、端子２０を圧入方向に押圧すると、端子２０の胴部２０ｂの外面の寸法が端子保持穴１４の空域の寸法に一致した位置（この位置を図２（ｂ）に端子保持穴１４の端子挿入端１４ｂからの距離Ｌで示す）で、胴部２０ｂの前端縁２０ｃが端子保持穴１４の内壁面１４ａと接触を開始し、前端縁２０ｃが接触した状態で端子保持穴１４内をそれ以上移動しなくなるまで押し込まれて停止する。そして、停止した位置で端子２０の胴部２０ｂの前端縁２０ｃと内壁面１４ａとの圧接力によって、端子２０が端子保持穴１４に保持される。したがって、端子保持穴１４のテーパ角度θ（水平に対する傾斜角度）は、端子保持穴１４の端子挿入端１４ｂから距離Ｌの直後の位置を端子２０を保持する所望位置とした場合、距離Ｌの位置で端子２０の胴部２０ｂの外面の寸法が端子保持穴１４の空域の寸法と一致するように設定すればよい。 The terminal holding hole 14 is formed in a square cross section corresponding to the cross sectional shape of the terminal 20. As shown in FIG. 2A, the terminal holding hole 14 is formed in a tapered hole whose diameter is reduced in the press-fitting direction of the terminal 20 (indicated by a white arrow in FIG. 2B). Therefore, when the terminal 20 is inserted into the terminal holding hole 14 from the terminal insertion end 14b with the guide portion 20a as the head and the terminal 20 is pressed in the press-fitting direction, the dimension of the outer surface of the body portion 20b of the terminal 20 becomes the terminal holding hole 14. The front end edge 20c of the body portion 20b is located within the terminal holding hole 14 at a position that matches the size of the airspace (this position is indicated by a distance L from the terminal insertion end 14b of the terminal holding hole 14 in FIG. The contact with the wall surface 14a is started, and it is pushed and stopped until it no longer moves in the terminal holding hole 14 with the front end edge 20c in contact. And the terminal 20 is hold | maintained at the terminal holding hole 14 by the press-contact force of the front-end edge 20c of the trunk | drum 20b of the terminal 20 and the inner wall surface 14a in the stopped position. Therefore, the taper angle θ (inclination angle with respect to the horizontal) of the terminal holding hole 14 is the position of the distance L when the position immediately after the distance L from the terminal insertion end 14b of the terminal holding hole 14 is a desired position for holding the terminal 20. Thus, the outer surface dimension of the body 20b of the terminal 20 may be set so as to coincide with the dimension of the air space of the terminal holding hole 14.

上記端子保持穴１４のテーパ角度θは、端子保持穴１４の長さ、端子２０と端子保持穴１４との間の保持部構造(端子２０の断面形状、タボ等の係止形状）により異なるが、例えば、０．５°〜１．０°の範囲となるようにすることが好ましい。テーパ角度θが０．５°未満であると、端子２０の胴部２０ｂの前端縁２０ｃが端子保持穴１４の内壁面１４ａと接触を開始した後の、押し込みによる前端縁２０ｃの移動距離が長くなるため、前端縁２０ｃと端子保持穴１４の内壁面１４ａとの擦れにより、端子２０に金属バリが発生しやすくなって好ましくない。一方、テーパ角度θが１．０°を超えると、端子２０の胴部２０ｂの前端縁２０ｃが端子保持穴１４の内壁面１４ａと接触を開始した後に、前端縁２０ｃを十分に押しむことができず、前端縁２０ｃと端子保持穴１４の内壁面１４ａとの間に端子２０を端子保持穴１４に保持するのに足る圧接力を得ることができない。 The taper angle θ of the terminal holding hole 14 varies depending on the length of the terminal holding hole 14 and the structure of the holding portion between the terminal 20 and the terminal holding hole 14 (cross-sectional shape of the terminal 20, locking shape such as a tab). For example, it is preferable to be in the range of 0.5 ° to 1.0 °. When the taper angle θ is less than 0.5 °, the front end edge 20c of the body 20b of the terminal 20 starts to come into contact with the inner wall surface 14a of the terminal holding hole 14, and the moving distance of the front end edge 20c by pushing is long. Therefore, it is not preferable because metal burrs are easily generated in the terminal 20 due to friction between the front edge 20c and the inner wall surface 14a of the terminal holding hole 14. On the other hand, when the taper angle θ exceeds 1.0 °, after the front end edge 20c of the body portion 20b of the terminal 20 starts to contact the inner wall surface 14a of the terminal holding hole 14, the front end edge 20c can be sufficiently pushed. It is impossible to obtain a pressure contact force sufficient to hold the terminal 20 in the terminal holding hole 14 between the front end edge 20 c and the inner wall surface 14 a of the terminal holding hole 14.

以上のように、本実施の形態の端子接続構造では、端子保持穴１４を端子圧入方向に縮径した先細りのテーパ穴に形成して、端子２０の胴部２０ｂの外面の寸法が端子保持穴１４の空域の寸法に一致する、端子挿入端１４ｂから距離Ｌの位置で初めて、胴部２０ｂの前端縁２０ｃを端子保持穴１４の内壁面１４ａと接触させるようにしているので、前端縁２０ｃが距離Ｌの直後の所望の位置まで端子２０を端子保持穴１４に圧入するのに、端子保持穴１４の内壁面１４ａと接触した前端縁２０ｃを短い距離移動させるだけで済み、端子２０に金属バリが発生することがない。 As described above, in the terminal connection structure of the present embodiment, the terminal holding hole 14 is formed as a tapered taper hole whose diameter is reduced in the terminal press-fitting direction, and the dimension of the outer surface of the body portion 20b of the terminal 20 is the terminal holding hole. Since the front end edge 20c of the trunk portion 20b is brought into contact with the inner wall surface 14a of the terminal holding hole 14 for the first time at a distance L from the terminal insertion end 14b, which matches the size of the airspace 14 of FIG. In order to press-fit the terminal 20 into the terminal holding hole 14 to a desired position immediately after the distance L, it is only necessary to move the front edge 20c in contact with the inner wall surface 14a of the terminal holding hole 14 for a short distance. Will not occur.

これに対し、図３に示す従来の端子接続構造では、ハウジング１０の端子保持壁１２にテーパのない真直な端子保持穴２４を形成しているので、端子２０を端子保持穴２４に挿入した直後から端子２０の胴部２０ｂの前端縁２０ｃが端子保持穴２４の内壁面２４ａと接触し、前端縁２０ｃが距離Ｌの直後の所望の位置まで端子２０を端子保持穴２４に圧入するのに、端子保持穴２４の内壁面２４ａと接触した胴部２０ｂを長い距離移動させなければならない。このため、胴部２０ｂの端子保持穴２４の内壁面２４ａとの擦れにより、胴部２０ｂの外周面の金属めっきまたは母材が削られて、図４に示すように、端子２０に金属バリ３０が発生する。このため、隣接した端子２０との間でショートを起こす事態が生じ、時として端子接続部に対し入念な検査を必要とする。上記構成の本実施の形態によれば、端子２０に金属バリが発生するのを防止できるので、このような問題が生じない。 In contrast, in the conventional terminal connection structure shown in FIG. 3, since the straight terminal holding hole 24 without taper is formed in the terminal holding wall 12 of the housing 10, immediately after the terminal 20 is inserted into the terminal holding hole 24. The front end edge 20c of the body 20b of the terminal 20 contacts the inner wall surface 24a of the terminal holding hole 24, and the front end edge 20c press-fits the terminal 20 into the terminal holding hole 24 to a desired position immediately after the distance L. The body portion 20b in contact with the inner wall surface 24a of the terminal holding hole 24 must be moved for a long distance. For this reason, the metal plating or the base material on the outer peripheral surface of the barrel portion 20b is scraped by rubbing with the inner wall surface 24a of the terminal holding hole 24 of the barrel portion 20b, and as shown in FIG. Will occur. For this reason, the situation which raise | generates a short circuit between the adjacent terminals 20 arises, and a careful test | inspection is sometimes required for a terminal connection part. According to the present embodiment configured as described above, it is possible to prevent the occurrence of metal burrs at the terminal 20, so that such a problem does not occur.

以上の実施の形態では、端子２０として正方形断面の端子を例にとって説明したが、端子２０の断面は縦横の長さの比が異なる一般的な四角形でもよい。さらには、端子２０は、三角形または五角形以上の断面を有するものであってもよく、円形等の輪郭が曲線の断面を有するものであってもよい。また、端子２０の先端部を先細りの案内部２０ａに形成したが、端子２０は圧入方向の先端から後端まで全長が同一断面形状であってもよい。その場合に、端子の先端の端縁に端子保持穴１４の内壁面１４ａとのかじりを防止するための丸面取りを施してあってもよい。また、以上の実施の形態では、コネクタハウジング１０の端子保持壁１２に設けられた複数の端子保持穴１４に端子ボード１８に設けられた複数の端子２０を圧入して、複数の端子２０を同時に接続するものであったが、本発明の端子接続構造はこれに限られず、独立した１つの端子保持穴に独立した１つの端子を圧入して接続する場合にも適用することができる。 In the above embodiment, a terminal having a square cross section has been described as an example of the terminal 20. However, the cross section of the terminal 20 may be a general square having a different ratio of length to width. Further, the terminal 20 may have a triangular or pentagonal cross section, or a circular shape or the like having a curved cross section. Moreover, although the front-end | tip part of the terminal 20 was formed in the taper guide part 20a, the terminal 20 may have the same cross-sectional shape from the front-end | tip to a rear end of a press-fit direction. In that case, a round chamfering may be applied to the edge of the tip of the terminal to prevent galling with the inner wall surface 14a of the terminal holding hole 14. In the above embodiment, the plurality of terminals 20 provided on the terminal board 18 are press-fitted into the plurality of terminal holding holes 14 provided in the terminal holding wall 12 of the connector housing 10, and the plurality of terminals 20 are simultaneously inserted. However, the terminal connection structure of the present invention is not limited to this, and can also be applied to a case where one independent terminal is press-fitted and connected to one independent terminal holding hole.

また、本発明は、実施の形態に限定されるものではなく、その趣旨を逸脱しない範囲内において、種々の変更が加えられて実施されるものである。 The present invention is not limited to the embodiments, and can be implemented with various modifications without departing from the spirit of the present invention.

本発明の端子接続構造が適用される電気機器の端子接続部を示す説明図である。It is explanatory drawing which shows the terminal connection part of the electric equipment with which the terminal connection structure of this invention is applied. 本発明の実施の形態に係る端子接続構造を示す断面図である。It is sectional drawing which shows the terminal connection structure which concerns on embodiment of this invention. 従来の端子接続構造を示す断面図である。It is sectional drawing which shows the conventional terminal connection structure. 従来の端子接続構造において端子に金属バリが発生するところを示す説明図である。It is explanatory drawing which shows the place where a metal burr | flash generate | occur | produces in a terminal in the conventional terminal connection structure.

符号の説明Explanation of symbols

１０コネクタハウジング
１２端子保持壁
１４端子保持穴
１４ａ内壁面
１４ｂ端子挿入端
２０端子
２０ｂ胴部
２０ｃ前端縁
θ テーパ角度 DESCRIPTION OF SYMBOLS 10 Connector housing 12 Terminal holding wall 14 Terminal holding hole 14a Inner wall surface 14b Terminal insertion end 20 Terminal 20b The trunk | drum 20c Front-end edge (theta) Taper angle

Claims

コネクタハウジングに設けられた端子保持穴と、前記端子保持穴に圧入される端子とからなる端子接続構造であって、
前記端子保持穴を前記端子の圧入方向に縮径するテーパ穴を形成し、前記テーパ穴における少なくとも一部の領域と、前記端子が直接接触することを特徴とする端子接続構造。 A terminal connection structure comprising a terminal holding hole provided in a connector housing and a terminal press-fitted into the terminal holding hole,
The terminal holding structure is characterized in that a taper hole for reducing the diameter of the terminal holding hole in the press-fitting direction of the terminal is formed, and at least a part of the tapered hole is in direct contact with the terminal.

前記端子保持穴の前記端子の圧入方向とは反対側の端子挿入端に、前記端子保持穴のテーパ角度より大きな角度のテーパを形成したことを特徴とする請求項１に記載の端子接続構造。 2. The terminal connection structure according to claim 1, wherein a taper having an angle larger than a taper angle of the terminal holding hole is formed at a terminal insertion end of the terminal holding hole opposite to the terminal press-fitting direction.

前記端子の先端部を先細りの案内部に形成するとともに、前記端子の前記案内部と前記端子の残余の胴部との境界部に丸面取りを施したことを特徴とする請求項１または２に記載の端子接続構造。
The tip of the terminal is formed into a tapered guide part, and a round chamfer is applied to a boundary part between the guide part of the terminal and a remaining body part of the terminal. The terminal connection structure described.