JP2022163250A - Wire with terminal and metal terminal - Google Patents

Wire with terminal and metal terminal Download PDF

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JP2022163250A
JP2022163250A JP2021068061A JP2021068061A JP2022163250A JP 2022163250 A JP2022163250 A JP 2022163250A JP 2021068061 A JP2021068061 A JP 2021068061A JP 2021068061 A JP2021068061 A JP 2021068061A JP 2022163250 A JP2022163250 A JP 2022163250A
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terminal
wire
electric wire
box
shaped portion
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隆二 杉▲崎▼
Ryuji Sugisaki
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Yazaki Corp
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Yazaki Corp
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Abstract

To improve resistance to vibration transmitted to a metal terminal during ultrasonic bonding.SOLUTION: A wire with a terminal includes a conductive wire, and a metal terminal 1 provided at the end of the wire. The metal terminal 1 includes a box-shaped portion 20 which is formed in a box shape and into which a mating terminal can be inserted into a terminal insertion space inside, and a spring contact portion 30 which is formed by bending from the box-shaped portion 20 into the terminal insertion space and is elastically deformably supported by the box-shaped portion 20 in a cantilever manner to form a contact with the mating terminal. In the spring contact portion 30, a press-worked fracture surface 30Cb is positioned on the inside of the bend, and a press-worked sheared surface 30Ca is positioned on the outside of the bend.SELECTED DRAWING: Figure 5

Description

本発明は、端子付き電線、及び、金属端子に関する。 TECHNICAL FIELD The present invention relates to an electric wire with a terminal and a metal terminal.

電線の一端に金属端子を備えた電線付電線を、他の電線の端部や中間部分等に接続する場合、例えば特許文献１に示すように、電線の芯線を覆う被覆を剥ぎ取り、外周面が露出した芯線同士を重ね合わせながら、超音波接合機により超音波振動を付与して芯線同士を接合する手法が用いられている。 When connecting a wire-attached wire having a metal terminal at one end of the wire to the end or intermediate portion of another wire, for example, as shown in Patent Document 1, the coating covering the core wire of the wire is stripped off, and the outer peripheral surface is removed. A technique is used in which the exposed core wires are superimposed on each other and the core wires are joined by applying ultrasonic vibration with an ultrasonic bonding machine.

特開２０１７－０５５６２３号公報JP 2017-055623 A

超音波接合を行う際、接合時の振動が電線を介して金属端子にまで伝わると、例えば、金属端子の構成要素であるバネは、金属端子を構成するその他の箇所と比べて剛性が弱いため、振動の影響を受けやすい。バネは雌端子の構成要素であり、底体と、底体から立設する側壁によって断面が矩形状に形成された箱部の内部に一体に形成されている。雌端子のバネは、雄端子のタブと接触することで電気的接続がなされる。したがって、超音波接合時には、金属端子に伝わる振動の影響について考慮する必要がある。 When performing ultrasonic bonding, if the vibration at the time of bonding is transmitted to the metal terminal via the electric wire, for example, the spring, which is a component of the metal terminal, is weaker in rigidity than the other parts that make up the metal terminal. , susceptible to vibration. The spring is a constituent element of the female terminal, and is integrally formed inside a box portion having a rectangular cross section formed by a bottom body and side walls erected from the bottom body. The spring of the female terminal makes electrical connection by contacting the tab of the male terminal. Therefore, it is necessary to consider the influence of vibration transmitted to the metal terminal during ultrasonic bonding.

そこで、本発明は、超音波接合時に金属端子に伝わる振動に対する耐性を向上させることができる端子付き電線、及び、金属端子を提供する。 Accordingly, the present invention provides an electric wire with a terminal and a metal terminal that can improve resistance to vibration transmitted to the metal terminal during ultrasonic bonding.

上記目的を達成するために、本発明に係る端子付き電線は、導電性を有する電線と、前記電線の端末に設けられる金属端子とを備え、前記金属端子は、箱状に形成され、内部の端子挿入空間部に相手端子を挿入可能である箱状部と、前記箱状部から前記端子挿入空間部内に折り曲げられて形成され、前記箱状部に弾性変形可能に片持ち状に支持され前記相手端子との接点を形成するバネ接点部と、を備え、前記バネ接点部は、折り曲げの内側にプレス加工の破断面が位置し、折り曲げの外側にプレス加工のせん断面が位置する。 In order to achieve the above object, an electric wire with a terminal according to the present invention includes an electric wire having conductivity and a metal terminal provided at an end of the electric wire, the metal terminal being formed in a box shape and having an internal a box-shaped portion into which a mating terminal can be inserted into the terminal insertion space; a box-shaped portion formed by bending the box-shaped portion into the terminal insertion space; a spring contact portion forming a contact with a mating terminal, wherein the spring contact portion has a press-worked fracture surface positioned inside the bend and a press-worked shear surface positioned outside the bend.

上記目的を達成するために、本発明に係る金属端子は、箱状に形成され、内部の端子挿入空間部に相手端子を挿入可能である箱状部と、前記箱状部から前記端子挿入空間部内に折り曲げられて形成され、前記箱状部に弾性変形可能に片持ち状に支持され前記相手端子との接点を形成するバネ接点部と、を備え、前記バネ接点部は、折り曲げの内側にプレス加工の破断面が位置し、折り曲げの外側にプレス加工のせん断面が位置する。 In order to achieve the above object, a metal terminal according to the present invention is formed in a box shape and has a box-shaped portion into which a mating terminal can be inserted into a terminal insertion space inside, and a terminal insertion space extending from the box-shaped portion. a spring contact portion that is formed by being bent inside the portion, is elastically deformably supported by the box-shaped portion in a cantilever manner, and forms a contact with the mating terminal; The fracture surface of press work is located, and the shear surface of press work is located outside the bending.

本発明に係る端子付き電線、及び、金属端子は、超音波接合時に金属端子に伝わる振動に対する耐性を向上できる、という効果を奏する。 ADVANTAGE OF THE INVENTION The electric wire with a terminal which concerns on this invention, and a metal terminal are effective in the ability to improve the resistance with respect to the vibration transmitted to a metal terminal at the time of ultrasonic joining.

図１は、実施形態に係る端子付き電線の概略構成を表す模式的な側面図である。Drawing 1 is a typical side view showing a schematic structure of an electric wire with a terminal concerning an embodiment. 図２は、実施形態に係る端子付き電線の概略構成を表す模式的な正面図である。FIG. 2 is a schematic front view showing a schematic configuration of the terminal-equipped electric wire according to the embodiment. 図３は、実施形態に係る金属端子において、折り曲げ成形がなされる前の状態を示す模式的な斜視図である。FIG. 3 is a schematic perspective view showing a state of the metal terminal according to the embodiment before being bent. 図４は、実施形態に係る端子付き電線の概略構成を表す模式的な斜視図である。FIG. 4 is a schematic perspective view showing a schematic configuration of an electric wire with a terminal according to the embodiment. 図５は、実施形態に係る端子付き電線、及び、金属端子における部分断面図である。FIG. 5 is a partial cross-sectional view of an electric wire with a terminal and a metal terminal according to the embodiment. 図６は、実施形態に係る端子付き電線、及び、金属端子における正面図である。FIG. 6 is a front view of an electric wire with a terminal and a metal terminal according to the embodiment. 図７は、図５で示すせん断面、破断面を模式した断面図である。FIG. 7 is a schematic cross-sectional view of the sheared surface and fractured surface shown in FIG. 図８は、実施形態に係る端子付き電線が適用されたワイヤハーネスの概略構成を表す模式図である。FIG. 8 is a schematic diagram showing a schematic configuration of a wire harness to which the electric wire with terminal according to the embodiment is applied. 図９は、実施形態に係る端子付き電線が適用されたワイヤハーネスの概略構成を表す模式図である。FIG. 9 is a schematic diagram showing a schematic configuration of a wire harness to which the electric wire with terminal according to the embodiment is applied. 図１０は、実施形態に係る端子付き電線が適用されたワイヤハーネスにおける超音波接合について説明する模式図である。FIG. 10 is a schematic diagram illustrating ultrasonic bonding in a wire harness to which the electric wire with terminal according to the embodiment is applied. 図１１は、変形例に係る端子付き電線の概略構成を表す模式図である。FIG. 11 is a schematic diagram showing a schematic configuration of an electric wire with a terminal according to a modification.

以下に、本発明に係る実施形態を図面に基づいて詳細に説明する。なお、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。また、下記実施形態における構成要素には、当業者が置換可能かつ容易なもの、あるいは実質的に同一のものが含まれる。 EMBODIMENT OF THE INVENTION Below, embodiment which concerns on this invention is described in detail based on drawing. In addition, this invention is not limited by this embodiment. In addition, components in the following embodiments include components that can be easily replaced by those skilled in the art, or components that are substantially the same.

以下の説明では、互いに交差する第１方向、第２方向、及び、第３方向のうち、第１方向を「軸方向Ｘ」といい、第２方向を「幅方向Ｙ」といい、第３方向を「高さ方向Ｚ」という。ここでは、軸方向Ｘと幅方向Ｙと高さ方向Ｚとは、相互に略直交する。軸方向Ｘは、典型的には、金属端子が設けられる電線の延在方向に相当し、金属端子と相手端子との挿抜方向に相当する。幅方向Ｙと高さ方向Ｚとは、軸方向Ｘと交差する交差方向に相当する。また、以下の説明で用いる各方向は、特に断りのない限り、各部が相互に組み付けられた状態での方向を表すものとする。 In the following description, among the first direction, the second direction, and the third direction that intersect each other, the first direction is called the "axial direction X", the second direction is called the "width direction Y", and the third direction is called the "width direction Y". The direction is called "height direction Z". Here, the axial direction X, the width direction Y, and the height direction Z are substantially orthogonal to each other. The axial direction X typically corresponds to the extending direction of the electric wire provided with the metal terminal, and corresponds to the insertion/extraction direction between the metal terminal and the mating terminal. The width direction Y and the height direction Z correspond to cross directions crossing the axial direction X. As shown in FIG. In addition, each direction used in the following description indicates the direction when each part is assembled with each other, unless otherwise specified.

［実施形態］
図１、図２に示す実施形態に係る端子付き電線１００は、導電性を有する電線Ｗと、電線Ｗの端末に設けられる金属端子１とを備える。実施形態に係る端子付き電線１００は、例えば、車両等に使用されるワイヤハーネスＷＨ１等に適用される。 [Embodiment]
A terminal-fitted wire 100 according to the embodiment shown in FIGS. 1 and 2 includes a conductive wire W and a metal terminal 1 provided at the end of the wire W. The electric wire with terminal 100 according to the embodiment is applied to, for example, a wire harness WH1 used in a vehicle or the like.

電線Ｗは、例えば、導電性を有する線状の導体部Ｗ１と、当該導体部Ｗ１の外側を覆う絶縁性を有する絶縁被覆部Ｗ２とを含んで構成される。電線Ｗは、絶縁被覆部Ｗ２で導体部Ｗ１を被覆した絶縁電線である。導体部Ｗ１は、導電性の金属、例えば、銅、銅合金、アルミニウム、アルミニウム合金等の素線を複数束ねた芯線である。導体部Ｗ１は、複数の素線を撚り合わせた撚り芯線であってもよい。絶縁被覆部Ｗ２は、導体部Ｗ１の外周側を被覆する電線被覆である。絶縁被覆部Ｗ２は、例えば、絶縁性の樹脂材料（ＰＰ（Polypropylene）やＰＶＣ（polyvinyl chloride）、架橋ＰＥ（polyethylene）等を押出成形することによって形成される。絶縁被覆部Ｗ２を構成する絶縁性の樹脂材料は、耐摩耗性や耐薬品性、耐熱性等に配慮して適宜選定される。電線Ｗは、少なくとも導体部Ｗ１の一方の端末において、絶縁被覆部Ｗ２が剥ぎ取られて導体部Ｗ１の一方の端末が絶縁被覆部Ｗ２から露出して形成される。端子付き電線１００は、露出している導体部Ｗ１の端末に金属端子１が設けられる。金属端子１は、電線Ｗの導体部（芯線）Ｗ１と導通されるものである。金属端子１は、例えば、後述するコネクタＣ（図８等参照）等に保持される。なお、以下の説明において、図８以外では、コネクタＣを外した状態を図示している。実施形態の金属端子１は、電線Ｗの端末に圧着される圧着端子であるがこれに限られない。 The electric wire W includes, for example, a linear conductor portion W1 having conductivity, and an insulating coating portion W2 covering the outside of the conductor portion W1 and having insulation properties. The electric wire W is an insulated electric wire in which a conductor portion W1 is covered with an insulating coating portion W2. The conductor portion W1 is a core wire in which a plurality of strands of conductive metal such as copper, copper alloy, aluminum, aluminum alloy, etc. are bundled. The conductor portion W1 may be a twisted core wire obtained by twisting a plurality of strands. The insulating coating portion W2 is a wire coating that covers the outer peripheral side of the conductor portion W1. The insulating coating W2 is formed, for example, by extruding an insulating resin material (PP (Polypropylene), PVC (polyvinyl chloride), crosslinked PE (polyethylene), etc.). The resin material of is appropriately selected in consideration of abrasion resistance, chemical resistance, heat resistance, etc. At least one end of the conductor portion W1 of the electric wire W is stripped of the insulation coating portion W2 and the conductor portion One end of W1 is exposed from the insulating coating portion W2.In the terminal-equipped wire 100, a metal terminal 1 is provided at the end of the exposed conductor portion W1.The metal terminal 1 is the conductor of the wire W. The metal terminal 1 is held by, for example, a connector C (see FIG. 8, etc.), which will be described later, etc. In the following description, except for FIG. The metal terminal 1 of the embodiment is a crimp terminal that is crimped to the end of the electric wire W, but is not limited to this.

ここで、図８、図９を参照して端子付き電線１００が適用されるワイヤハーネスＷＨ１について説明する。ワイヤハーネスＷＨ１は、例えば、車両に搭載される各装置間の接続のために、電源供給や信号通信に用いられる複数の電線Ｗを束にして集合部品（電線束）とし、コネクタＣ等で複数の電線Ｗを各装置に接続するようにしたものである。ワイヤハーネスＷＨ１は、少なくとも１つの端子付き電線１００と、端子付き電線１００を構成する電線Ｗに接続される接続相手電線ＷＡと、電線Ｗと接続相手電線ＷＡとが電気的に接続された分岐接続部ＪＴとを備える。ワイヤハーネスＷＨ１は、この他、さらに、コルゲートチューブ、グロメット等の外装部材、電気接続箱、固定具など種々の構成部品を含んで構成されてもよい。 Here, a wire harness WH1 to which the electric wire with terminal 100 is applied will be described with reference to FIGS. 8 and 9. FIG. The wire harness WH1 is, for example, a bundle of a plurality of electric wires W used for power supply and signal communication for connection between devices mounted on a vehicle. is connected to each device. The wire harness WH1 includes at least one terminal-equipped wire 100, a connection partner wire WA connected to the wire W constituting the terminal-equipped wire 100, and a branch connection in which the wire W and the connection partner wire WA are electrically connected. Part JT. The wire harness WH1 may further include various components such as a corrugated tube, an exterior member such as a grommet, an electric connection box, and a fixture.

実施形態のワイヤハーネスＷＨ１は、複数（ここでは、４つ）の端子付き電線１００を備える電線束であり、当該複数の端子付き電線１００の各電線Ｗが分岐接続部ＪＴで相互に接合されている。この分岐接続部ＪＴは、複数の電線Ｗのつなぎ部分（ジョイント部分）を構成するものであり、言い換えれば、複数の電線Ｗが分岐する分岐部分を構成するものであるということもできる。この場合、ワイヤハーネスＷＨ１は、各端子付き電線１００において、残りの他の端子付き電線１００の電線Ｗが接続相手電線ＷＡに相当することとなる。言い換えれば、各端子付き電線１００は、電線Ｗと接続相手電線ＷＡとが接続される分岐接続部ＪＴを備えているということもできる。 The wire harness WH1 of the embodiment is a wire bundle including a plurality of (here, four) terminal-attached wires 100, and the wires W of the plurality of terminal-attached wires 100 are mutually joined at a branch connection portion JT. there is The branch connection portion JT constitutes a connection portion (joint portion) of the plurality of electric wires W, in other words, it can be said to constitute a branch portion where the plurality of electric wires W branch. In this case, in the wire harness WH1, in each terminal-fitted wire 100, the wire W of the other terminal-fitted wire 100 corresponds to the connection partner wire WA. In other words, it can be said that each electric wire with terminal 100 has a branch connection portion JT to which the electric wire W and the connection partner electric wire WA are connected.

実施形態の各電線Ｗは、両端部において、導体部Ｗ１が絶縁被覆部Ｗ２から露出している。そして、各電線Ｗは、一方の端部に金属端子１が設けられ、当該金属端子１がそれぞれコネクタＣのハウジングに保持される一方、他方の端部同士が分岐接続部ＪＴで相互に接合されている。 In each electric wire W of the embodiment, the conductor portion W1 is exposed from the insulating coating portion W2 at both end portions. Each electric wire W is provided with a metal terminal 1 at one end, and the metal terminal 1 is held in the housing of the connector C, while the other ends are joined to each other at the branch connection portion JT. ing.

実施形態の分岐接続部ＪＴは、電線Ｗと接続相手電線ＷＡとが超音波接合された超音波接合部ＵＷ１を形成する。超音波接合部ＵＷ１は、各電線Ｗにおいて、絶縁被覆部Ｗ２から露出した導体部Ｗ１同士を超音波接合した部分である。超音波接合部ＵＷ１は、各導体部Ｗ１の当該接合部分が絶縁性を有する保護部材ＪＴＨによって覆われ、保護されている。 The branch connection part JT of the embodiment forms an ultrasonic joint part UW1 in which the electric wire W and the connection counterpart electric wire WA are ultrasonically joined. The ultrasonically bonded portion UW1 is a portion of each electric wire W in which the conductor portions W1 exposed from the insulating coating portion W2 are ultrasonically bonded. The ultrasonic bonding portion UW1 is covered and protected by a protective member JTH having insulating properties at the bonding portion of each conductor portion W1.

ここで、超音波接合とは、図１０に例示するように、超音波接合機の振動子を構成するホーンＭ１によって接続対象に対して超音波振動を印加し、当該印加された超音波振動を用いて行う金属間接合である。この場合、接続対象である複数の電線Ｗは、露出した各導体部（芯線）Ｗ１を重ねた状態で、受け治具を構成するアンビルＭ２と上記ホーンＭ１とによって当該各導体部（芯線）Ｗ１が挟持され、当該重なった導体部Ｗ１に対してホーンＭ１により超音波振動が加振される。この結果、複数の電線Ｗは、典型的には、重ねられた導体部Ｗ１の接合面が超音波振動によって互いに擦れ合うことで塑性変形により固相状態で接合され、超音波接合部ＵＷ１が形成される。 Here, as illustrated in FIG. 10, the ultrasonic bonding means that ultrasonic vibration is applied to a connection target by a horn M1 that constitutes a vibrator of an ultrasonic bonding machine, and the applied ultrasonic vibration is It is metal-to-metal joining performed using In this case, the plurality of electric wires W to be connected are connected to each of the conductor portions (core wires) W1 by the anvil M2 constituting the receiving jig and the horn M1 in a state in which the exposed conductor portions (core wires) W1 are overlapped. are sandwiched, and ultrasonic vibration is applied to the overlapped conductor portion W1 by the horn M1. As a result, the plurality of electric wires W are typically joined in a solid phase state by plastic deformation by rubbing the joint surfaces of the superimposed conductor portions W1 against each other due to ultrasonic vibration, thereby forming an ultrasonic joint portion UW1. be.

上記のように構成されるワイヤハーネスＷＨ１は、超音波接合部ＵＷ１の形成過程で導体部Ｗ１に超音波振動が加振された際、当該振動が端子付き電線１００の電線Ｗを伝播し金属端子１に印加される。実施形態の端子付き電線１００は、このような構造にあって、上記のような超音波接合時に金属端子１に伝わる振動に対する耐性を向上させるものである。以下、再び、図１、図２を参照して金属端子１の各構成について詳細に説明する。 In the wire harness WH1 configured as described above, when ultrasonic vibrations are applied to the conductor portion W1 in the process of forming the ultrasonic bonding portion UW1, the vibration propagates through the electric wire W of the electric wire 100 with a terminal, thereby forming a metal terminal. 1. The electric wire with terminal 100 of the embodiment has such a structure and improves resistance to vibration transmitted to the metal terminal 1 during ultrasonic bonding as described above. Hereinafter, each configuration of the metal terminal 1 will be described in detail with reference to FIGS. 1 and 2 again.

金属端子１は、図１、図２に示すように、電線Ｗが電気的に接続され、導電性を有する相手端子Ｔが挿抜される端子金具である。実施形態の金属端子１は、雌型の端子形状として形成され、雄型の端子形状の相手端子Ｔと電気的に接続される。相手端子Ｔは、中心軸線が軸方向Ｘに沿う略矩形柱状に形成されている。 As shown in FIGS. 1 and 2, the metal terminal 1 is a terminal fitting to which an electric wire W is electrically connected and to which a conductive mating terminal T is inserted. The metal terminal 1 of the embodiment is formed in a female terminal shape and electrically connected to a mating terminal T having a male terminal shape. The mating terminal T is formed in a substantially rectangular columnar shape with a central axis along the axial direction X. As shown in FIG.

具体的には、金属端子１は、電線接続部１０と、箱状部２０と、バネ接点部３０とを備える。電線接続部１０、箱状部２０、及び、バネ接点部３０は、全体が一体で導電性を有する金属、例えば、銅、銅合金、アルミニウム、アルミニウム合金等によって構成される。金属端子１は、例えば、電線接続部１０、箱状部２０、バネ接点部３０等の各部に対応した形状に打ち抜かれた一枚の板金をプレス加工、及び、折り曲げ成形することにより各部が立体的に一体で形成される（図３等参照）。金属端子１は、軸方向Ｘに沿って一方側から他方側に向かって、電線接続部１０、箱状部２０の順で並んで相互に連結され、箱状部２０の内部にバネ接点部３０が設けられる。 Specifically, the metal terminal 1 includes a wire connecting portion 10 , a box-shaped portion 20 and a spring contact portion 30 . The wire connecting portion 10, the box-shaped portion 20, and the spring contact portion 30 are integrally made of a conductive metal such as copper, copper alloy, aluminum, or aluminum alloy. For example, the metal terminal 1 is formed by pressing and bending a piece of sheet metal punched into shapes corresponding to the wire connecting portion 10, the box-shaped portion 20, the spring contact portion 30, etc., so that each portion is three-dimensional. are integrally formed (see FIG. 3, etc.). The metal terminal 1 is arranged in the order of the wire connection portion 10 and the box-shaped portion 20 from one side to the other side along the axial direction X and is connected to each other. is provided.

電線接続部１０は、電線Ｗが接続され、当該電線Ｗの端末の導体部Ｗ１と金属端子１とを電気的に接続する部分である。実施形態の電線接続部１０は、電線Ｗに加締められて圧着される電線圧着部を構成する。電線接続部１０は、導体圧着部１１と中間部１２と被覆圧着部１３とを含んで構成される。電線接続部１０は、軸方向Ｘに沿って箱状部２０側から反対側に向かって、導体圧着部１１、中間部１２、被覆圧着部１３の順で並んで相互に連結される。 The wire connection portion 10 is a portion to which the wire W is connected and which electrically connects the conductor portion W1 at the end of the wire W and the metal terminal 1 . The wire connection portion 10 of the embodiment constitutes a wire crimp portion to which the wire W is crimped by crimping. The wire connecting portion 10 includes a conductor crimping portion 11 , an intermediate portion 12 and a covering crimping portion 13 . In the wire connecting portion 10 , the conductor crimping portion 11 , the intermediate portion 12 , and the covering crimping portion 13 are arranged in this order from the box-shaped portion 20 side toward the opposite side along the axial direction X and connected to each other.

導体圧着部１１は、電線接続部１０において軸方向Ｘの一端側、ここでは、箱状部２０側に設けられ電線Ｗの導体部Ｗ１に対して加締められ圧着される部分である。さらに言えば、導体圧着部１１は、導体部Ｗ１に対して加締められ圧着されることで、当該導体部Ｗ１と電気的に接続される部分である。導体圧着部１１は、基部１４、及び、当該基部１４から幅方向Ｙに帯状に延びて形成されたバレル片（加締片）部１１ａによって、電線Ｗの導体部Ｗ１の外側を包んで当該導体部Ｗ１に対して加締められ圧着される。バレル片部１１ａは、図示していないが基部１４から幅方向Ｙの両側にそれぞれ帯状に延びて一対で形成される。ここでは、基部１４は、軸方向Ｘに沿って延在し導体圧着部１１、中間部１２、被覆圧着部１３のそれぞれの一部を構成する。基部１４は、軸方向Ｘの一方側に箱状部２０が連結される。金属端子１は、電線接続部１０と箱状部２０とが基部１４を介して電気的に接続され、当該基部１４を介して箱状部２０と電線Ｗの導体部Ｗ１とが電気的に接続され導通される。 The conductor crimping portion 11 is provided on one end side of the wire connecting portion 10 in the axial direction X, here, on the box-shaped portion 20 side, and is crimped to the conductor portion W1 of the wire W by crimping. Furthermore, the conductor crimping portion 11 is a portion that is electrically connected to the conductor portion W1 by crimping and crimping the conductor portion W1. The conductor crimping portion 11 includes a base portion 14 and a barrel piece (crimping piece) portion 11a formed by extending in the width direction Y from the base portion 14 in a belt-like shape. It is crimped and crimped to the portion W1. The barrel pieces 11a are formed as a pair extending from the base portion 14 to both sides in the width direction Y in a band shape (not shown). Here, the base portion 14 extends along the axial direction X and forms part of each of the conductor crimping portion 11 , the intermediate portion 12 , and the covering crimping portion 13 . A box-shaped portion 20 is connected to one side in the axial direction X of the base portion 14 . In the metal terminal 1, the wire connecting portion 10 and the box-shaped portion 20 are electrically connected via the base portion 14, and the box-shaped portion 20 and the conductor portion W1 of the wire W are electrically connected via the base portion 14. is turned on.

中間部１２は、導体圧着部１１と被覆圧着部１３との間に介在し、当該導体圧着部１１と当該被覆圧着部１３とを連結する部分である。 The intermediate portion 12 is a portion interposed between the conductor crimping portion 11 and the covering crimping portion 13 to connect the conductor crimping portion 11 and the covering crimping portion 13 .

被覆圧着部１３は、電線接続部１０において軸方向Ｘの他端側、ここでは、箱状部２０側とは反対側に設けられ電線Ｗの絶縁被覆部Ｗ２に対して加締められ圧着される部分である。被覆圧着部１３は、上記基部１４、及び、当該基部１４から幅方向Ｙに帯状に延びて形成されたバレル片（加締片）部１３ａによって、電線Ｗの絶縁被覆部Ｗ２の外側を包んで当該絶縁被覆部Ｗ２に対して加締められ圧着される。バレル片部１３ａは、図示していないが基部１４から幅方向Ｙの両側にそれぞれ帯状に延びて一対で形成される。 The covering crimping portion 13 is provided on the other end side of the wire connection portion 10 in the axial direction X, here, on the side opposite to the box-shaped portion 20 side, and is crimped and crimped to the insulating covering portion W2 of the electric wire W. part. The covering crimping portion 13 wraps the outer side of the insulating covering portion W2 of the electric wire W with the base portion 14 and a barrel piece (crimping piece) portion 13a formed by extending in the width direction Y from the base portion 14 in a strip shape. It is crimped and crimped to the insulating coating W2. The barrel pieces 13a are formed as a pair extending in a belt shape from the base 14 to both sides in the width direction Y, although not shown.

なお、実施形態の電線接続部１０は、導体圧着部１１の各バレル片部１１ａと被覆圧着部１３の各バレル片部１３ａとの間に中間部１２が介在することで各バレル片部１１ａと各バレル片部１３ａとが分断されたいわゆる別体バレル型の圧着部を構成する。また、電線接続部１０は、例えば、導体圧着部１１の一対のバレル片部１１ａ同士が互いに重なり合わず（オーバーラップせず）、いわゆるＢクリンプと称する加締め圧着がなされるものとして形成することができる。しかしながら、電線接続部１０の形式は、これらに限らない。電線接続部１０は、導体圧着部１１、中間部１２、被覆圧着部１３において、一対のバレル片部が軸方向Ｘに沿って連続し一体化されたいわゆる一体バレル型の圧着部を構成してもよい。また、電線接続部１０は、一対のバレル片部１１ａ同士が互いに重なり合って（オーバーラップして）加締め圧着がなされるものであってもよい。また、電線接続部１０は、そもそも電線圧着部でなくてもよく、圧着以外の形式、例えば、溶着、締結等の形式で電線Ｗに対して電気的に接続されるものであってもよい。 The wire connecting portion 10 of the embodiment has an intermediate portion 12 interposed between each barrel piece portion 11a of the conductor crimping portion 11 and each barrel piece portion 13a of the covering crimping portion 13. A so-called separate barrel-type crimping portion is formed by being separated from each barrel piece portion 13a. In addition, the wire connecting portion 10 is formed so that, for example, the pair of barrel pieces 11a of the conductor crimping portion 11 are not overlapped with each other and are crimped by so-called B crimping. can be done. However, the form of the electric wire connection part 10 is not restricted to these. The wire connection portion 10 constitutes a so-called integral barrel type crimp portion in which a pair of barrel pieces are continuously integrated along the axial direction X in the conductor crimp portion 11, the intermediate portion 12, and the coated crimp portion 13. good too. Also, the wire connecting portion 10 may be crimped by crimping the pair of barrel pieces 11a on top of each other (overlapping). Also, the wire connecting portion 10 may not be a wire crimping portion in the first place, and may be electrically connected to the wire W by a method other than crimping, such as welding or fastening.

箱状部２０は、相手端子Ｔと電気的に接続される部分である。箱状部２０は、上述したように雌型の端子形状に形成され、雄型の端子形状に形成された相手端子Ｔと電気的に接続される。実施形態の箱状部２０は、電線接続部１０に連結されて箱状に形成され、内部の端子挿入空間部２４に軸方向Ｘに沿って相手端子Ｔを挿入可能な部分を構成する。 The box-shaped portion 20 is a portion electrically connected to the mating terminal T. As shown in FIG. The box-shaped portion 20 is formed in the shape of a female terminal as described above, and is electrically connected to the mating terminal T formed in the shape of a male terminal. The box-shaped portion 20 of the embodiment is formed in a box-like shape by being connected to the wire connection portion 10, and constitutes a portion into which the mating terminal T can be inserted along the axial direction X into the terminal insertion space portion 24 inside.

箱状部２０は、中心軸線が軸方向Ｘに沿う筒状に形成される。実施形態の箱状部２０は、略矩形筒状に形成された中空の箱部を構成する。箱状部２０は、軸方向Ｘに沿って延在し、軸方向Ｘの一方側が開口して端子挿入口２４ａを形成し、他方側に電線接続部１０が連結される。そして、箱状部２０は、内部の空間部が端子挿入空間部２４を構成する。端子挿入空間部２４は、略矩形柱状に形成された相手端子Ｔが挿抜される空間部である。 The box-shaped portion 20 is formed in a tubular shape with a center axis along the axial direction X. As shown in FIG. The box-shaped part 20 of the embodiment constitutes a hollow box part formed in a substantially rectangular tubular shape. The box-shaped portion 20 extends along the axial direction X, and one side in the axial direction X is open to form a terminal insertion opening 24a, and the wire connecting portion 10 is connected to the other side. The space inside the box-shaped portion 20 constitutes a terminal insertion space portion 24 . The terminal insertion space portion 24 is a space portion into which the mating terminal T formed in a substantially rectangular columnar shape is inserted.

より具体的には、箱状部２０は、底体２１、及び、一対の壁体２２，２３を有し、これら底体２１、及び、一対の壁体２２，２３によって箱状に形成される。底体２１、及び、一対の壁体２２，２３は、一体となって略矩形筒状の箱部を形成する。 More specifically, the box-shaped portion 20 has a bottom body 21 and a pair of walls 22 and 23, and the bottom body 21 and the pair of walls 22 and 23 form a box shape. . The bottom body 21 and the pair of wall bodies 22 and 23 are integrated to form a substantially rectangular tubular box portion.

底体２１は、板厚方向が高さ方向Ｚに沿う略矩形板状に形成され、軸方向Ｘに沿って延在する。底体２１は、軸方向Ｘの一方の端部（端子挿入口２４ａ側とは反対側の端部）が電線接続部１０の基部１４に連結される。言い換えれば、電線接続部１０は、この底体２１に連結される。 The bottom body 21 is formed in a substantially rectangular plate shape whose plate thickness direction is along the height direction Z and extends along the axial direction X. As shown in FIG. One end of the bottom body 21 in the axial direction X (the end opposite to the terminal insertion opening 24 a side) is connected to the base 14 of the wire connecting portion 10 . In other words, the wire connecting portion 10 is connected to this bottom body 21 .

一対の壁体２２，２３は、底体２１において幅方向Ｙの両端からそれぞれ突出して形成される。より詳細には、一対の壁体２２，２３は、それぞれ、側壁部２２ａ，２３ａ、及び、天面部２２ｂ，２３ｂを有して形成される。 The pair of walls 22 and 23 are formed to protrude from both ends in the width direction Y of the bottom body 21 . More specifically, the pair of walls 22 and 23 are formed with side wall portions 22a and 23a and top surface portions 22b and 23b, respectively.

側壁部２２ａと側壁部２３ａとは、それぞれ、壁体２２，２３において、底体２１から高さ方向Ｚに沿って延在する部分である。側壁部２２ａと側壁部２３ａとは、板厚方向が幅方向Ｙに沿う略矩形板状に形成され、軸方向Ｘに沿って延在する。そして、側壁部２２ａと側壁部２３ａとは、幅方向Ｙに沿って端子挿入空間部２４を挟んで間隔をあけて対向する。 The side wall portion 22a and the side wall portion 23a are portions of the wall bodies 22 and 23 that extend from the bottom body 21 along the height direction Z, respectively. The side wall portion 22a and the side wall portion 23a are formed in a substantially rectangular plate shape whose plate thickness direction is along the width direction Y and extend along the axial direction X. As shown in FIG. The side wall portion 22a and the side wall portion 23a are opposed to each other along the width direction Y with the terminal insertion space portion 24 interposed therebetween.

天面部２２ｂと天面部２３ｂとは、それぞれ、壁体２２，２３において、壁体２２，２３の側壁部２２ａ，２３ａから幅方向Ｙに沿って延在する部分である。天面部２２ｂ，２３ｂは、上述の底体２１と同様に、板厚方向が高さ方向Ｚに沿う略矩形板状に形成され、軸方向Ｘに沿って延在する。そして、天面部２２ｂ，２３ｂと上述の底体２１とは、高さ方向Ｚに沿って端子挿入空間部２４を挟んで間隔をあけて対向する。 The top surface portion 22b and the top surface portion 23b are portions of the walls 22 and 23 that extend along the width direction Y from the side walls 22a and 23a of the walls 22 and 23, respectively. The top surface portions 22b and 23b are formed in a substantially rectangular plate shape whose plate thickness direction is along the height direction Z and extends along the axial direction X, like the bottom body 21 described above. The top surface portions 22b and 23b and the bottom body 21 are opposed to each other along the height direction Z with a terminal insertion space portion 24 interposed therebetween.

そして、実施形態の一対の壁体２２，２３は、一部が重複部２５を構成する。重複部２５は、一対の壁体２２，２３において相互に重なり合う部分である。実施形態の重複部２５は、一対の壁体２２，２３において天面部２２ｂと天面部２３ｂとによって構成される。つまり、一対の壁体２２，２３は、天面部２２ｂと天面部２３ｂとが高さ方向Ｚに沿って相互に重なり合うことで重複部２５を構成する。ここでは、天面部２２ｂと天面部２３ｂとは、一対の天面部２２ｂ，２３ｂのうち、天面部２２ｂが内側（端子挿入空間部２４側）に位置し、天面部２３ｂが外側（端子挿入空間部２４側とは反対側）に位置して、高さ方向Ｚに対して重なっている。天面部２２ｂと天面部２３ｂとは、相互に重なり合った状態で、高さ方向Ｚに沿って対向する。 A part of the pair of walls 22 and 23 of the embodiment constitutes an overlapping portion 25 . The overlapping portion 25 is a portion of the pair of walls 22 and 23 that overlap each other. The overlapping portion 25 of the embodiment is configured by a top surface portion 22b and a top surface portion 23b of the pair of walls 22 and 23. As shown in FIG. That is, the pair of walls 22 and 23 constitutes the overlapping portion 25 by overlapping the top surface portion 22b and the top surface portion 23b along the height direction Z. As shown in FIG. Here, the top surface portion 22b and the top surface portion 23b are arranged such that, of the pair of top surface portions 22b and 23b, the top surface portion 22b is located inside (the terminal insertion space portion 24 side), and the top surface portion 23b is located outside (the terminal insertion space portion). 24 side) and overlapped with respect to the height direction Z. The top surface portion 22b and the top surface portion 23b face each other along the height direction Z while overlapping each other.

端子挿入空間部２４は、上述のように形成される底体２１、及び、一対の壁体２２，２３によって区画される。すなわち、端子挿入空間部２４は、高さ方向Ｚが底体２１と壁体２２の天面部２２ｂ，２３ｂとによって区画され、幅方向Ｙが壁体２２の側壁部２２ａと壁体２３の側壁部２３ａとによって区画される。これにより、端子挿入空間部２４は、箱状部２０の内部に軸方向Ｘに沿って延在して形成される。そして、箱状部２０は、底体２１、側壁部２２ａ，２３ａ、天面部２２ｂの軸方向Ｘの一方の端部（電線接続部１０側とは反対側の端部）によって、端子挿入空間部２４に対する端子挿入口２４ａが形成される。箱状部２０は、軸方向Ｘの一方の端部に形成された当該端子挿入口２４ａを介して内部の端子挿入空間部２４に軸方向Ｘに沿って相手端子Ｔが挿入される。 The terminal insertion space 24 is defined by the bottom body 21 and the pair of walls 22 and 23 formed as described above. That is, the terminal insertion space 24 is defined by the bottom 21 and the top surfaces 22b and 23b of the wall 22 in the height direction Z, and is defined by the side wall 22a of the wall 22 and the side wall 23 in the width direction Y. 23a. Thereby, the terminal insertion space portion 24 is formed to extend along the axial direction X inside the box-shaped portion 20 . The box-shaped portion 20 is defined by one end in the axial direction X (the end opposite to the wire connecting portion 10 side) of the bottom body 21, the side walls 22a and 23a, and the top surface portion 22b. A terminal insertion opening 24a for 24 is formed. The mating terminal T is inserted into the terminal insertion space 24 inside the box-shaped portion 20 along the axial direction X through the terminal insertion opening 24a formed at one end in the axial direction X. As shown in FIG.

バネ接点部３０は、相手端子Ｔとの接点を形成する部分である。バネ接点部３０は、端子挿入空間部２４内に位置し、箱状部２０に弾性変形可能に片持ち状に支持される。バネ接点部３０は、板厚方向が高さ方向Ｚに沿い、軸方向Ｘに沿って延在する。バネ接点部３０は、高さ方向Ｚの一方側の板面が底体２１と対向し、他方側の板面が天面部２２ｂ，２３ｂと対向して位置する。バネ接点部３０は、軸方向Ｘの端子挿入口２４ａ側の端部が底体２１に連結され支持される。つまり、バネ接点部３０は、軸方向Ｘの端子挿入口２４ａ側の端部である基端部が底体２１に連結されて支持され、軸方向Ｘの端子挿入口２４ａ側とは反対側の端部である先端部が自由端となる。バネ接点部３０は、軸方向Ｘの端子挿入口２４ａ側の端部が底体２１から連続して形成され、図３に示すプレス加工後に底体２１側に折り返して折り曲げられることで当該底体２１に支持される基端部が構成される。これにより、実施形態のバネ接点部３０は、底体２１に高さ方向Ｚに対して弾性変形可能に片持ち状に支持される。 The spring contact portion 30 is a portion that forms a contact with the mating terminal T. As shown in FIG. The spring contact portion 30 is located in the terminal insertion space portion 24 and supported by the box-shaped portion 20 in a cantilever manner so as to be elastically deformable. The spring contact portion 30 extends along the axial direction X with the plate thickness direction along the height direction Z. As shown in FIG. The spring contact portion 30 is positioned so that one plate surface in the height direction Z faces the bottom body 21 and the other plate surface faces the top surface portions 22b and 23b. The spring contact portion 30 is supported by being connected to the bottom body 21 at its end portion on the side of the terminal insertion opening 24a in the axial direction X. As shown in FIG. That is, the spring contact portion 30 is supported by being connected to the bottom body 21 at the base end portion, which is the end portion on the terminal insertion opening 24a side in the axial direction X, and is supported on the opposite side to the terminal insertion opening 24a side in the axial direction X. The tip, which is the end, is a free end. The spring contact portion 30 is formed continuously from the bottom body 21 at the end on the side of the terminal insertion opening 24a in the axial direction X, and is folded back toward the bottom body 21 after press working shown in FIG. A proximal end supported by 21 is provided. Thereby, the spring contact portion 30 of the embodiment is supported by the bottom body 21 in a cantilever manner so as to be elastically deformable in the height direction Z. As shown in FIG.

なお、バネ接点部３０は、軸方向Ｘの中腹部分が天面部２２ｂ側に突出するように屈曲することで接点形成部３０ａが形成されている。接点形成部３０ａは、端子挿入空間部２４に挿入された相手端子Ｔと接触し当該相手端子Ｔとの間に接点を形成し導通される主たる部分である。なお、バネ接点部３０は、軸方向Ｘの端子挿入口２４ａ側の端部が底体２１に連結され支持されるものとして説明したがこれに限らない。バネ接点部３０は、箱状部２０の全体形状によっては、例えば、幅方向Ｙの端部の一部で底体２１に連結され支持される構成であってもよい。また、バネ接点部３０は、例えば、天面部２２ｂ，２３ｂ側に支持されていてもよい。 The spring contact portion 30 has a contact forming portion 30a formed by bending such that the midsection in the axial direction X protrudes toward the top surface portion 22b. The contact forming portion 30a is a main portion that contacts with the mating terminal T inserted into the terminal insertion space portion 24 to form a contact with the mating terminal T and conduct electricity. Although the spring contact portion 30 has been described as being supported by being connected to the bottom body 21 at the end on the side of the terminal insertion opening 24a in the axial direction X, the present invention is not limited to this. Depending on the overall shape of the box-shaped portion 20, the spring contact portion 30 may be configured to be connected to and supported by the bottom body 21 at a portion of the end portion in the width direction Y, for example. Also, the spring contact portion 30 may be supported on the top surface portions 22b and 23b, for example.

上記のように構成される金属端子１は、相手端子Ｔが端子挿入口２４ａを介して軸方向Ｘに沿って端子挿入空間部２４に挿入される。このとき、金属端子１は、当該相手端子Ｔがバネ接点部３０を底体２１側に撓ませながら端子挿入空間部２４に挿入される。そして、金属端子１は、バネ接点部３０が接点形成部３０ａ等を介して相手端子Ｔと接触し自身の弾性復元力によって当該相手端子Ｔ側に押圧され、当該相手端子Ｔとの間に接点を形成する。この結果、金属端子１は、接点形成部３０ａ等を介して相手端子Ｔと導通され、電線Ｗと相手端子Ｔとを導通接続することができる。 In the metal terminal 1 configured as described above, the mating terminal T is inserted into the terminal insertion space 24 along the axial direction X through the terminal insertion opening 24a. At this time, the metal terminal 1 is inserted into the terminal insertion space portion 24 while the corresponding mating terminal T bends the spring contact portion 30 toward the bottom body 21 side. The spring contact portion 30 contacts the mating terminal T through the contact forming portion 30a and the like, and the metal terminal 1 is pressed toward the mating terminal T by its own elastic restoring force. to form As a result, the metal terminal 1 is electrically connected to the mating terminal T via the contact forming portion 30a and the like, and the electric wire W and the mating terminal T can be conductively connected.

上述した金属端子１は、図３に示すように、キャリアＣＲに連結された展開状態で、電線接続部１０、箱状部２０、バネ接点部３０等の各部に対応した形状にプレス加工によって打ち抜かれる。金属端子１は、図３の矢印Ｐ方向にプレス加工される。即ち、金属端子１は、一方の面１Ａ（図３で示す下側の面）から他方の面１Ｂ（図３で示す上側の面）に向けてプレス加工によって打ち抜かれる。そして、このような矢印Ｐ方向にプレス加工して打ち抜かれた展開状態の金属端子１は、その端面１Ｃにおいて、一方の面１Ａの連接する側がせん断面となり、他方の面１Ｂの連接する側が破断面となる。 As shown in FIG. 3, the metal terminal 1 described above is punched into shapes corresponding to the wire connecting portion 10, the box-shaped portion 20, the spring contact portion 30, and the like in the unfolded state connected to the carrier CR by press working. be The metal terminal 1 is pressed in the direction of arrow P in FIG. That is, the metal terminal 1 is punched out by pressing from one surface 1A (lower surface shown in FIG. 3) toward the other surface 1B (upper surface shown in FIG. 3). The developed metal terminal 1 punched out by pressing in the direction of arrow P has a sheared surface on the side where one surface 1A is connected, and a fractured surface on the side where the other surface 1B is connected. cross section.

せん断面と破断面とについて、図５乃至図８により説明する。図５は、バネ接点部３０を底体２１側に折り曲げた状態で底体２１を図２の矢線Ａで切断した部分断面図である。図５に示すように、実施形態の金属端子１は、バネ接点部３０が底体２１における他方の面１Ｂ側に折り曲げられる。バネ接点部３０は、折り曲げの内側面３０Ｂが他方の面１Ｂとなって、底体２１の他方の面１Ｂと対向する。また、バネ接点部３０は、折り曲げの外側面３０Ａが一方の面１Ａとなって、底体２１とは反対側（天面部２２ｂ側）を向く。そして、バネ接点部３０は、その端面３０Ｃ（１Ｃ）において、折り曲げの外側となる外側面３０Ａの連接する側にプレス加工のせん断面３０Ｃａが位置し、折り曲げの内側となる内側面３０Ｂの連接する側にプレス加工の破断面３０Ｃｂが位置する。なお、図５では、せん断面３０Ｃａと破断面３０Ｃｂとの境を二点鎖線で概略示している。 The sheared surface and the fractured surface will be explained with reference to FIGS. 5 to 8. FIG. FIG. 5 is a partial cross-sectional view of the bottom body 21 cut along the arrow A in FIG. 2 with the spring contact portion 30 bent toward the bottom body 21 side. As shown in FIG. 5, in the metal terminal 1 of the embodiment, the spring contact portion 30 is bent toward the other surface 1B of the bottom body 21 . The spring contact portion 30 faces the other surface 1B of the bottom body 21 with the bent inner surface 30B serving as the other surface 1B. In addition, the spring contact portion 30 faces the side opposite to the bottom body 21 (the top surface portion 22b side) with the bent outer surface 30A serving as one surface 1A. In the end surface 30C (1C) of the spring contact portion 30, the sheared surface 30Ca formed by pressing is positioned on the side where the outer side surface 30A, which is the outer side of the bending, is connected, and the inner side surface 30B, which is the inner side of the bending, is connected. A press-worked fracture surface 30Cb is located on the side. In addition, in FIG. 5, the boundary between the sheared surface 30Ca and the fractured surface 30Cb is schematically shown by a chain double-dashed line.

また、図６は、壁体２２，２３を底体２１側に折り曲げた状態の正面図である。図６に示すように、実施形態の金属端子１は、壁体２２，２３が底体２１における他方の面１Ｂ側に折り曲げられる。壁体２２，２３は、折り曲げの内側面２２Ｂ，２３Ｂが他方の面１Ｂとなって、底体２１の他方の面１Ｂ側を向く。また、壁体２２，２３は、折り曲げの外側面２２Ａ，２３Ａが一方の面１Ａとなって、底体２１とは反対側（箱状部２０における端子挿入空間部２４の外側）を向く。そして、壁体２２，２３は、その端面２２Ｃ，２３Ｃ（１Ｃ）において、折り曲げの外側となる外側面２２Ａ，２３Ａの連接する側にプレス加工のせん断面２２Ｃａ，２３Ｃａが位置し、折り曲げの内側となる内側面２２Ｂ，２３Ｂの連接する側にプレス加工の破断面２２Ｃｂ，２３Ｃｂが位置する。なお、図６では、せん断面２２Ｃａ，２３Ｃａと破断面２２Ｃｂ，２３Ｃｂとの境を二点鎖線で概略示している。 6 is a front view of a state in which the wall bodies 22 and 23 are bent toward the bottom body 21. As shown in FIG. As shown in FIG. 6, in the metal terminal 1 of the embodiment, wall members 22 and 23 are bent toward the other surface 1B of the bottom member 21 . The walls 22 and 23 face the other surface 1B of the bottom 21 with the inner side surfaces 22B and 23B of the walls 22 and 23 forming the other surface 1B. In addition, the walls 22 and 23 face the side opposite to the bottom 21 (the outside of the terminal insertion space 24 in the box-shaped portion 20) with the bent outer side surfaces 22A and 23A serving as one surface 1A. In the end faces 22C, 23C (1C) of the walls 22, 23, the sheared surfaces 22Ca, 23Ca formed by press working are located on the side where the outer side faces 22A, 23A, which are the outside of the bending, are connected to each other. Press-worked fracture surfaces 22Cb and 23Cb are located on the side where the inner side surfaces 22B and 23B are connected. In FIG. 6, the boundaries between the sheared surfaces 22Ca, 23Ca and the fractured surfaces 22Cb, 23Cb are schematically shown by two-dot chain lines.

図７は、図５で示したせん断面、破断面を模式した断面図であり、図５の矢線Ｂで切断した断面図である。バネ接点部３０において、端面３０Ｃのせん断面３０Ｃａは、端面３０Ｃの破断面３０Ｃｂよりも滑らかに形成される。逆に、端面３０Ｃの破断面３０Ｃｂは、端面３０Ｃのせん断面３０Ｃａよりも粗く形成される。また、図には明示しないが、壁体２２，２３において、端面２２Ｃ，２３Ｃのせん断面２２Ｃａ，２３Ｃａは、破断面２２Ｃｂ，２３Ｃｂよりも滑らかに形成され、破断面２２Ｃｂ，２３Ｃｂは、せん断面２２Ｃａ，２３Ｃａよりも粗く形成される。 FIG. 7 is a schematic cross-sectional view of the sheared surface and fractured surface shown in FIG. In the spring contact portion 30, the sheared surface 30Ca of the end surface 30C is formed more smoothly than the fractured surface 30Cb of the end surface 30C. Conversely, the fractured surface 30Cb of the end surface 30C is formed to be rougher than the sheared surface 30Ca of the end surface 30C. Although not shown in the drawings, the sheared surfaces 22Ca and 23Ca of the end surfaces 22C and 23C of the walls 22 and 23 are formed more smoothly than the fractured surfaces 22Cb and 23Cb. , 23Ca.

そして、実施形態の端子付き電線１００は、図１０に示すように、分岐接続部ＪＴを構成する超音波接合部ＵＷ１の形成過程で振動が電線Ｗを伝播し金属端子１に伝わる。金属端子１に振動が伝わると、バネ接点部３０や、壁体２２，２３は振動する。バネ接点部３０は、金属端子１に伝わる振動によって、その折り曲げの外側面３０Ａが内側面３０Ｂよりも大きく撓んで伸びる。実施形態の端子付き電線１００、及び、金属端子１では、バネ接点部３０は、その端面３０Ｃ（１Ｃ）において、折り曲げの外側にプレス加工のせん断面３０Ｃａが位置し、折り曲げの内側にプレス加工の破断面３０Ｃｂが位置する。このため、バネ接点部３０は、滑らかなせん断面３０Ｃａ側に比較的応力がかかり易くなり、粗い破断面３０Ｃｂ側に振動による繰り返し応力がかかる場合と比べて亀裂の発生が減少する。この結果、実施形態の端子付き電線１００、及び、金属端子１によれば、超音波接合時に金属端子１に伝わる振動に対する耐性を向上でき、疲労寿命を向上できる。 In the electric wire 100 with terminal of the embodiment, as shown in FIG. 10, vibration propagates through the electric wire W and reaches the metal terminal 1 in the process of forming the ultrasonic joint UW1 that constitutes the branch connection JT. When vibration is transmitted to the metal terminal 1, the spring contact portion 30 and the walls 22 and 23 vibrate. Due to the vibration transmitted to the metal terminal 1, the spring contact portion 30 bends and extends at its bent outer side surface 30A more than the inner side surface 30B. In the electric wire 100 with a terminal and the metal terminal 1 of the embodiment, the spring contact portion 30 has a press-worked sheared surface 30Ca on the outside of the bend, and a press-worked shear surface 30Ca on the inside of the bend on the end face 30C (1C). A fracture surface 30Cb is located. Therefore, stress is relatively easily applied to the smooth sheared surface 30Ca side of the spring contact portion 30, and crack generation is reduced compared to the case where repeated stress due to vibration is applied to the rough fractured surface 30Cb side. As a result, according to the electric wire 100 with a terminal and the metal terminal 1 of the embodiment, the resistance to vibration transmitted to the metal terminal 1 during ultrasonic bonding can be improved, and the fatigue life can be improved.

即ち、実施形態の端子付き電線１００、及び、金属端子１は、振動による亀裂の生成を遅らせて、疲労寿命を向上させることが可能となる。一般に、疲労破壊は、材料に繰り返し応力がかかることで表面や内部の欠陥や割れを起点として亀裂が徐々に進展し、最終的に破壊に至る現象である。疲労破壊は、表面の粗さが悪い場合、微細表面の凹凸によって欠陥部に応力が生じやすく、破壊に至りやすい。金属端子１は、プレス加工による成形時に、材料を打ち抜いた端面１Ｃ（３０Ｃ，２２Ｃ，２３Ｃ）にせん断面３０Ｃａ，２２Ｃａ，２３Ｃａと、破断面３０Ｃｂ，２２Ｃｂ，２３Ｃｂが生成される。一般的な金属端子では、せん断面に比べて表面が粗い破断面が折り曲げの外側に配置されている。その為、一般的な金属端子は、曲げ部では応力集中によって亀裂が発生しやすく疲労破壊の起点となり得る傾向にある。これに対して、実施形態の端子付き電線１００、及び、金属端子１は、折り曲げの外側にせん断面３０Ｃａ，２２Ｃａ，２３Ｃａを配置するように打ち抜いて折り曲げ成形を行うことで応力発生部の表面粗さを改善し、容易に疲労寿命を向上する効果を得られる。 That is, the terminal-equipped wire 100 and the metal terminal 1 of the embodiment can delay the generation of cracks due to vibration and improve the fatigue life. In general, fatigue fracture is a phenomenon in which repeated stress is applied to a material, causing cracks to gradually grow starting from defects or cracks on the surface or inside, eventually leading to fracture. When the surface roughness is poor, the fatigue fracture is likely to occur due to the stress generated in the defective portion due to the fine unevenness of the surface. The metal terminal 1 has sheared surfaces 30Ca, 22Ca, and 23Ca and fractured surfaces 30Cb, 22Cb, and 23Cb on the end surfaces 1C (30C, 22C, and 23C) punched out of the material during molding by press working. In a general metal terminal, a fractured surface, which is rougher than a sheared surface, is arranged on the outer side of the bend. For this reason, in general metal terminals, stress concentration tends to cause cracks at bent portions, which tend to be starting points of fatigue fracture. On the other hand, the electric wire 100 with a terminal and the metal terminal 1 of the embodiment are punched out so that the sheared surfaces 30Ca, 22Ca, and 23Ca are arranged on the outer side of the bend, and then bent to form the surface roughness of the stress-generating portion. The effect of improving fatigue life can be easily obtained.

また、壁体２２，２３は、金属端子１に伝わる振動によって、その折り曲げの外側面２２Ａ，２３Ａが内側面２２Ｂ，２３Ｂよりも大きく撓んで伸びる。実施形態の端子付き電線１００、及び、金属端子１では、壁体２２，２３は、その端面２２Ｃ，２３Ｃ（１Ｃ）において、折り曲げの外側にプレス加工のせん断面２２Ｃａ，２３Ｃａが位置し、折り曲げの内側にプレス加工の破断面２２Ｃｂ，２３Ｃｂが位置する。このため、壁体２２，２３は、滑らかなせん断面２２Ｃａ，２３Ｃａ側に比較的応力がかかり易くなり、粗い破断面２２Ｃｂ，２３Ｃｂ側に振動による繰り返し応力がかかる場合と比べて亀裂の発生が減少する。この結果、実施形態の端子付き電線１００、及び、金属端子１によれば、超音波接合時に金属端子１に伝わる振動に対する耐性を向上でき、疲労寿命を向上できる。 Further, the wall members 22 and 23 are bent and stretched at the bent outer side surfaces 22A and 23A more than the bent inner side surfaces 22B and 23B due to the vibration transmitted to the metal terminal 1.例文帳に追加In the electric wire 100 with a terminal and the metal terminal 1 of the embodiment, the walls 22 and 23 have the press-worked sheared surfaces 22Ca and 23Ca located outside the bending at the end faces 22C and 23C (1C) of the walls 22 and 23. Press-worked fracture surfaces 22Cb and 23Cb are located inside. For this reason, the wall bodies 22 and 23 are relatively easy to apply stress to the smooth sheared surfaces 22Ca and 23Ca, and the generation of cracks is reduced compared to the case where repeated stress due to vibration is applied to the rough fractured surfaces 22Cb and 23Cb. do. As a result, according to the electric wire 100 with a terminal and the metal terminal 1 of the embodiment, the resistance to vibration transmitted to the metal terminal 1 during ultrasonic bonding can be improved, and the fatigue life can be improved.

このように実施形態の端子付き電線１００、及び、金属端子１では、分岐接続部ＪＴを構成する超音波接合部ＵＷ１の形成過程において生じる振動に対し、金属端子１に伝わる振動に対する耐性を向上でき、疲労寿命を向上できる。 As described above, in the terminal-equipped wire 100 and the metal terminal 1 of the embodiment, the resistance to the vibration transmitted to the metal terminal 1 can be improved with respect to the vibration generated in the process of forming the ultrasonic joint portion UW1 that constitutes the branch connection portion JT. , can improve fatigue life.

なお、上述した本発明の実施形態に係る端子付き電線１００、及び、金属端子１は、上述した実施形態に限定されず、特許請求の範囲に記載された範囲で種々の変更が可能である。 Note that the terminal-equipped wire 100 and the metal terminal 1 according to the embodiment of the present invention described above are not limited to the above-described embodiment, and various modifications can be made within the scope of the claims.

以上の説明では、端子付き電線１００の各電線Ｗは、一方の端部に金属端子１が設けられ、他方の端部同士が超音波接合部ＵＷ１で相互に接合されるものとして説明し、たがこれに限らない。例えば、各電線Ｗは、両端部にそれぞれ金属端子１が設けられていてもよい。そして、超音波接合部ＵＷ１は、各電線Ｗの中腹部分において、絶縁被覆部Ｗ２から露出した導体部Ｗ１を超音波接合した部分であってもよい。 In the above description, each electric wire W of the electric wire with terminal 100 is provided with the metal terminal 1 at one end, and the other ends are joined to each other by the ultrasonic joint UW1. is not limited to this. For example, each electric wire W may be provided with metal terminals 1 at both ends thereof. Then, the ultrasonically bonded portion UW1 may be a portion in which the conductor portion W1 exposed from the insulating coating portion W2 is ultrasonically bonded in the middle portion of each electric wire W.

以上の説明では、ワイヤハーネスＷＨ１は、各端子付き電線１００において、残りの他の端子付き電線１００の電線Ｗが接続相手電線ＷＡとなるものとして説明したがこれに限らない。ワイヤハーネスＷＨ１は、少なくとも１つの端子付き電線１００を備えた上で、当該端子付き電線１００に対する接続相手電線ＷＡは、端子付き電線１００の電線Ｗでなくてもよい。 In the above description, the wiring harness WH1 is described assuming that the electric wire W of the other electric wire with terminal 100 is the connection partner electric wire WA in each electric wire with terminal 100, but the present invention is not limited to this. The wire harness WH1 may include at least one terminal-equipped electric wire 100, and the connection partner electric wire WA for the terminal-equipped electric wire 100 may not be the electric wire W of the terminal-equipped electric wire 100.

以上の説明では、端子付き電線１００は、超音波接合部ＵＷ１を備え、超音波接合部ＵＷ１の形成過程で金属端子１に振動が加わる構造であるものとして説明したがこれに限らない。端子付き電線１００は、超音波接合部ＵＷ１を備えず、金属端子１に超音波振動等が伝達されないものであってもよい。同様に、端子付き電線１００は、分岐接続部ＪＴを備えるものとして説明したがこれに限らず分岐接続部ＪＴを備えない構成であってもよい。これらの場合であっても、端子付き電線１００、金属端子１は、適正な導通性能を確保することができる。 In the above description, the electric wire with terminal 100 is provided with the ultrasonic joint UW1, and has a structure in which vibration is applied to the metal terminal 1 in the process of forming the ultrasonic joint UW1. The electric wire 100 with a terminal may not include the ultrasonic joint UW<b>1 and may not transmit ultrasonic vibration or the like to the metal terminal 1 . Similarly, although the electric wire with terminal 100 has been described as including the branch connection portion JT, the configuration is not limited to this and may be a configuration without the branch connection portion JT. Even in these cases, the electric wire with terminal 100 and the metal terminal 1 can ensure proper conduction performance.

以上の説明では、端子付き電線１００は、例えば、車両等に使用されるワイヤハーネスＷＨ１等に適用されるものとして説明したがこれに限らない。 In the above description, the electric wire with terminal 100 is applied to, for example, the wire harness WH1 used in a vehicle or the like, but it is not limited to this.

以上の説明では、電線接続部１０は、電線Ｗに加締められて圧着される電線圧着部を構成するものとして説明したがこれに限らず、圧着以外の形式、例えば、溶着、締結等の形式で電線Ｗに対して電気的に接続されるものであってもよい。 In the above description, the wire connection portion 10 is described as constituting a wire crimping portion that is crimped by crimping the wire W, but the present invention is not limited to this, and the wire connection portion 10 is not limited to this, and may be in a form other than crimping, such as welding, fastening, or the like. may be electrically connected to the electric wire W at .

例えば、図１１に例示する変形例に係るワイヤハーネスＷＨ２は、端子付き電線２００を備え、当該端子付き電線２００は、金属端子２０１を備える。そして、ワイヤハーネスＷＨ２、端子付き電線２００、金属端子２０１は、電線接続部１０にかえて電線接続部２１０を備える点で上述したワイヤハーネスＷＨ１、端子付き電線１００、金属端子１と異なる。ワイヤハーネスＷＨ２、端子付き電線２００、金属端子２０１のその他の構成は、上述のワイヤハーネスＷＨ１、端子付き電線１００、金属端子１と略同様の構成である。 For example, a wire harness WH2 according to a modification illustrated in FIG. The wire harness WH2, the electric wire with terminal 200, and the metal terminal 201 are different from the wire harness WH1, the electric wire with terminal 100, and the metal terminal 1 described above in that a wire connecting portion 210 is provided instead of the wire connecting portion 10. FIG. Other configurations of the wire harness WH2, the electric wire with terminal 200, and the metal terminal 201 are substantially the same as those of the wire harness WH1, the electric wire with terminal 100, and the metal terminal 1 described above.

本変形例の電線接続部２１０は、板厚方向が高さ方向Ｚに沿う略矩形板状に形成される。ここでは、箱状部２０の底体２１（図１等参照）は、当該板状に形成された電線接続部２１０に連結される。そして、電線接続部２１０は、絶縁被覆部Ｗ２から露出した電線Ｗの導体部Ｗ１と超音波接合されることで超音波接合部ＵＷ２を形成する。つまり、この端子付き電線２００は、金属端子２０１自身にも超音波接合部ＵＷ２を備えている。ここでの超音波接合部ＵＷ２は、端子付き電線２００において、金属端子２０１の電線接続部２１０と電線Ｗの導体部Ｗ１とを超音波接合した部分である。 The wire connecting portion 210 of this modified example is formed in a substantially rectangular plate shape whose plate thickness direction is along the height direction Z. As shown in FIG. Here, the bottom body 21 (see FIG. 1, etc.) of the box-shaped part 20 is connected to the wire connection part 210 formed in the plate shape. The wire connection portion 210 is ultrasonically joined to the conductor portion W1 of the wire W exposed from the insulating coating portion W2 to form an ultrasonic joint portion UW2. In other words, the terminal-equipped electric wire 200 also has the ultrasonic bonding portion UW2 on the metal terminal 201 itself. The ultrasonic bonding portion UW2 here is a portion where the wire connection portion 210 of the metal terminal 201 and the conductor portion W1 of the wire W are ultrasonically bonded in the terminal-equipped wire 200 .

端子付き電線２００は、図１０の例と同様に、電線接続部２１０と導体部Ｗ１とを重ねた状態で、アンビルＭ２とホーンＭ１とによって電線接続部２１０と導体部Ｗ１とが挟持され、当該重なった部分に対してホーンＭ１により超音波振動が加振される。この結果、端子付き電線２００は、典型的には、重ねられた電線接続部２１０と導体部Ｗ１との接合面が超音波振動によって互いに擦れ合うことで塑性変形により固相状態で接合され、超音波接合部ＵＷ２が形成される。これにより、端子付き電線２００は、電線接続部２１０に電線Ｗを導通接続することができる。 In the electric wire 200 with a terminal, the electric wire connection portion 210 and the conductor portion W1 are sandwiched between the anvil M2 and the horn M1 in a state in which the electric wire connection portion 210 and the conductor portion W1 are overlapped as in the example of FIG. Ultrasonic vibration is applied to the overlapped portion by the horn M1. As a result, the terminal-equipped wire 200 is typically joined in a solid phase state by plastic deformation by rubbing the joining surfaces of the superimposed wire connection portion 210 and the conductor portion W1 against each other due to ultrasonic vibration. A junction UW2 is formed. Thereby, the electric wire 200 with a terminal can electrically connect the electric wire W to the electric wire connection portion 210 .

上記のように構成される端子付き電線２００、及び、金属端子２０１は、金属端子２０１自身に超音波接合部ＵＷ２が形成されるような場合であっても、端子付き電線１００、及び、金属端子１と同様に、超音波接合時に金属端子１に伝わる振動に対する耐性を向上でき、疲労寿命を向上できる。 The electric wire with terminal 200 and the metal terminal 201 configured as described above can be used even when the ultrasonic joint UW2 is formed in the metal terminal 201 itself. 1, resistance to vibration transmitted to the metal terminal 1 during ultrasonic bonding can be improved, and fatigue life can be improved.

実施形態に係る端子付き電線１００，２００、及び、金属端子１，２０１は、以上で説明した実施形態、変形例の構成要素を適宜組み合わせることで構成してもよい。 The electric wires 100 and 200 with terminals and the metal terminals 1 and 201 according to the embodiments may be configured by appropriately combining the constituent elements of the embodiments and modifications described above.

１，２０１ 金属端子
１０ 電線接続部
２０ 箱状部
２１ 底体
２２，２３ 壁体
２２Ｃｂ，２３Ｃｂ 破断面
２２Ｃａ，２３Ｃａ せん断面
２４ 端子挿入空間部
３０ バネ接点部
３０Ｃａ せん断面
３０Ｃｂ 破断面
１００，２００ 端子付き電線
ＪＴ 分岐接続部
Ｔ 相手端子
ＵＷ１ 超音波接合部
ＵＷ２ 超音波接合部
Ｗ 電線
ＷＡ 接続相手電線 Reference Signs List 1, 201 metal terminal 10 wire connecting portion 20 box-shaped portion 21 bottom 22, 23 wall 22Cb, 23Cb fractured surface 22Ca, 23Ca sheared surface 24 terminal insertion space 30 spring contact portion 30Ca sheared surface 30Cb fractured surface 100, 200 terminal Attached wire JT Branch connection T Mating terminal UW1 Ultrasonic joint UW2 Ultrasonic joint W Electric wire WA Mating wire

Claims (5)

導電性を有する電線と、
前記電線の端末に設けられる金属端子とを備え、
前記金属端子は、
箱状に形成され、内部の端子挿入空間部に相手端子を挿入可能である箱状部と、
前記箱状部から前記端子挿入空間部内に折り曲げられて形成され、前記箱状部に弾性変形可能に片持ち状に支持され前記相手端子との接点を形成するバネ接点部と、
を備え、
前記バネ接点部は、折り曲げの内側にプレス加工の破断面が位置し、折り曲げの外側にプレス加工のせん断面が位置する、端子付き電線。 an electric wire having electrical conductivity;
A metal terminal provided at the end of the electric wire,
The metal terminals are
a box-shaped portion in which the mating terminal can be inserted into the terminal insertion space inside;
a spring contact portion formed by bending from the box-shaped portion into the terminal insertion space portion, supported elastically deformably on the box-shaped portion in a cantilever manner, and forming a contact with the mating terminal;
with
The electric wire with a terminal, wherein the spring contact portion has a press-worked fracture surface located inside the bend, and a press-worked shear surface located outside the bend. 前記箱状部は、底体、及び、当該底体の両端からそれぞれ折り曲げられて形成された一対の壁体によって箱状に形成され、前記壁体は、折り曲げの内側にプレス加工の破断面が位置し、折り曲げの外側にプレス加工のせん断面が位置する、請求項１に記載の端子付き電線。 The box-shaped portion is formed in a box shape by a bottom body and a pair of wall bodies formed by bending both ends of the bottom body. 2. The electric wire with a terminal according to claim 1, wherein the sheared surface of the press work is located on the outer side of the bend. 前記電線と接続相手電線とが接続される分岐接続部を備え、
前記分岐接続部は、前記電線と前記接続相手電線とが超音波接合された超音波接合部を形成する、
請求項１または請求項２に記載の端子付き電線。 A branch connection portion to which the electric wire and the connection partner electric wire are connected,
The branch connection forms an ultrasonic joint in which the electric wire and the connection partner electric wire are ultrasonically joined.
The electric wire with a terminal according to claim 1 or 2. 前記金属端子は、
前記箱状部に連結され前記電線が接続される電線接続部を備え、
前記電線接続部は、前記電線と超音波接合された超音波接合部を形成する、
請求項１乃至請求項３のいずれか１項に記載の端子付き電線。 The metal terminals are
A wire connection part connected to the box-shaped part and connected to the wire,
The wire connection portion forms an ultrasonic bond that is ultrasonically bonded to the wire,
The electric wire with a terminal according to any one of claims 1 to 3. 箱状に形成され、内部の端子挿入空間部に相手端子を挿入可能である箱状部と、
前記箱状部から前記端子挿入空間部内に折り曲げられて形成され、前記箱状部に弾性変形可能に片持ち状に支持され前記相手端子との接点を形成するバネ接点部と、
を備え、
前記バネ接点部は、折り曲げの内側にプレス加工の破断面が位置し、折り曲げの外側にプレス加工のせん断面が位置する、金属端子。 a box-shaped portion in which the mating terminal can be inserted into the terminal insertion space inside;
a spring contact portion formed by bending from the box-shaped portion into the terminal insertion space portion, supported elastically deformably on the box-shaped portion in a cantilever manner, and forming a contact with the mating terminal;
with
In the metal terminal, the spring contact portion has a press-worked fracture surface located inside the bend, and a press-worked shear surface located outside the bend.
JP2021068061A 2021-04-14 2021-04-14 Wire with terminal and metal terminal Pending JP2022163250A (en)

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