JP2015220146A - Crimp-style terminal for fine current, and wire harness for fine current - Google Patents

Crimp-style terminal for fine current, and wire harness for fine current Download PDF

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JP2015220146A
JP2015220146A JP2014103639A JP2014103639A JP2015220146A JP 2015220146 A JP2015220146 A JP 2015220146A JP 2014103639 A JP2014103639 A JP 2014103639A JP 2014103639 A JP2014103639 A JP 2014103639A JP 2015220146 A JP2015220146 A JP 2015220146A
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layer
current
base material
wire
crimp terminal
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孝和 高橋
Takakazu Takahashi
孝和 高橋
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Yazaki Corp
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Yazaki Corp
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Priority to JP2014103639A priority Critical patent/JP2015220146A/en
Priority to US14/715,642 priority patent/US9666956B2/en
Priority to CN201510257210.3A priority patent/CN105098384B/en
Publication of JP2015220146A publication Critical patent/JP2015220146A/en
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Abstract

PROBLEM TO BE SOLVED: To provide a crimp-style terminal for fine current, which is simple in structure and insusceptible to corrosion even in a long-term use, and which is arranged so that the rise in temperature and the increase in electric resistance can be suppressed by passing fine current therethrough even when its base material is made up of stainless steel larger than, in electric resistance, copper.SOLUTION: A crimp-style terminal 1 for fine current comprises a wire barrel part 37 to connect a core wire including aluminum or an aluminum alloy to, provided that a current passed through the core wire is lower than a typical current. The crimp-style terminal further comprises: a base material 31 including iron or a corrosion-resistant iron alloy; a first layer 33 provided on the surface of the base material 31; and a second layer 35 provided on the surface of the first layer 33. The first layer 33 is made of a material which enables the removal of a passive film present the surface of the base material 31. The second layer 35 is made of a material which enables the increase in corrosion resistance and lubricity, and stabilizes the value of the electric resistance.

Description

本発明は、微電流用圧着端子および微電流用ワイヤハーネスに関する。   The present invention relates to a crimp terminal for minute current and a wire harness for minute current.

従来、銅もしくは銅合金で構成された母材で構成された圧着端子（銅製圧着端子）が知られている。この圧着端子にアルミニウム製またはアルミニウム合金製の芯線を接続すると、芯線に含まれるアルミニウムと母材に含まれる銅との電位差によって、アルミニウムの溶出が促進され、芯線や圧着端子の腐食が急速に進む。   Conventionally, a crimp terminal (copper crimp terminal) composed of a base material composed of copper or a copper alloy is known. When an aluminum or aluminum alloy core wire is connected to this crimp terminal, the potential difference between the aluminum contained in the core wire and the copper contained in the base material promotes the elution of aluminum, and the corrosion of the core wire and the crimp terminal proceeds rapidly. .

そこで、従来、銅もしくは銅合金で構成された母材（基材）の表面に錫のメッキ層を設けた構成の圧着端子（銅製圧着端子）が知られている。   Therefore, conventionally, a crimp terminal (copper crimp terminal) having a structure in which a tin plating layer is provided on the surface of a base material (base material) composed of copper or a copper alloy is known.

また、従来、図６で示すような端子付き電線３０１が知られている（たとえば、特許文献１参照）。   Conventionally, a terminal-attached electric wire 301 as shown in FIG. 6 is known (see, for example, Patent Document 1).

端子付き電線３０１は、アルミニウム製またはアルミニウム合金製の芯線３０３を絶縁被覆３０５で覆った電線３０７と、電線３０７の端末から露出した芯線３０３に圧着されるバレル部３０９および相手側端子と導通可能に接続される接続部３１１を有する端子３１３とを備えて構成されている。   The terminal-attached electric wire 301 can be electrically connected to an electric wire 307 in which a core wire 303 made of aluminum or aluminum alloy is covered with an insulating coating 305, a barrel portion 309 that is crimped to the core wire 303 exposed from the end of the electric wire 307, and a counterpart terminal. And a terminal 313 having a connection portion 311 to be connected.

端子３１３は、鉄または鉄合金からなる端子本体３１５と、導通部材３１７とから構成されている。導通部材３１７は、少なくともバレル部３０９と芯線３０３との間、および、接続部３１１と相手側端子との間に配置され、イオン化傾向が芯線３０３と同等あるいは端子本体３１５より芯線３０３に近く、かつ、電気抵抗が端子本体３１５より小さい金属材料で構成されている。   The terminal 313 includes a terminal body 315 made of iron or an iron alloy, and a conduction member 317. The conducting member 317 is disposed at least between the barrel portion 309 and the core wire 303 and between the connecting portion 311 and the counterpart terminal, and has an ionization tendency equal to that of the core wire 303 or closer to the core wire 303 than the terminal body 315, and The electric resistance is made of a metal material smaller than the terminal body 315.

特開２０１３−２４３１０６号公報JP 2013-243106 A

ところで、銅製圧着端子は、強度面に優れ、折り曲げ加工が容易であり、導電率が高いという特徴を備えている。しかし、銅製圧着端子では、表面に錫メッキが設けられていても、潮風に曝されたり高温多湿等の車両（銅製圧着端子が使用された車両）の厳しい使用環境下での長年の使用によって、芯線や圧着端子の腐食が急速に進むおそれがあるという問題がある。   By the way, the copper crimp terminal is characterized by excellent strength, easy bending, and high electrical conductivity. However, with copper crimp terminals, even if tin plating is provided on the surface, it has been used for many years under severe conditions of vehicles exposed to sea breeze or high temperature and humidity (vehicles using copper crimp terminals) There is a problem that corrosion of the core wire and the crimp terminal may proceed rapidly.

アルミニウム等に芯線が接続されている銅製圧着端子において、たとえば、錫メッキ層と銅等の母材との接触部分（異種金属の接触部）に塩分を含む水分が浸入すると、錫と銅との電位差により錫が溶出する。錫の溶出が進行することで銅製の母材が露出すると、芯線と銅製の母材とが接触する。   In a copper crimp terminal in which a core wire is connected to aluminum or the like, for example, when moisture containing salt enters a contact portion (contact portion of a dissimilar metal) between a tin plating layer and a base material such as copper, Tin is eluted by the potential difference. When the copper base material is exposed as the elution of tin proceeds, the core wire and the copper base material come into contact with each other.

これにより、芯線に含まれるアルミニウムと母材に含まれる銅との電位差によって、アルミニウムの溶出と錫の溶出が促進され、芯線や圧着端子の腐食が急速に進む。   Thereby, the elution of aluminum and the elution of tin are promoted by the potential difference between the aluminum contained in the core wire and the copper contained in the base material, and the corrosion of the core wire and the crimp terminal proceeds rapidly.

また、このように腐食が発生した銅製圧着端子に、通常電流を流して使用すると、発熱し電気抵抗値が上昇してしまうおそれがある。   Further, when a normal current is applied to the copper crimp terminal that has been corroded in this way, heat may be generated and the electrical resistance value may increase.

図６に示す端子付き電線３０１では、導通部材３１７を設けたことで、腐食し難く、かつ、電気抵抗が小さくなっているが、導通部材３１７の存在によって構成が煩雑になっている。   In the electric wire with terminal 301 shown in FIG. 6, the provision of the conductive member 317 makes it difficult to corrode and the electrical resistance is small, but the configuration is complicated due to the presence of the conductive member 317.

本発明は、上記問題点等に着眼してなされたものであり、構成が簡素であり、長年の使用によっても腐食しづらく、母材が銅に比べて電気抵抗値が大きいステンレススチールで構成されていても、微電流を流すことで温度上昇や、温度上昇による電気抵抗値の上昇を抑制することができる微電流用圧着端子および微電流用ワイヤハーネスを提供することを目的とする。   The present invention has been made in view of the above-mentioned problems and the like, has a simple structure, is not easily corroded even after many years of use, and the base material is made of stainless steel having a larger electric resistance value than copper. However, it is an object of the present invention to provide a fine current crimping terminal and a fine current wire harness capable of suppressing a temperature rise and an increase in electric resistance value due to the temperature rise by flowing a fine current.

請求項１に記載の発明は、アルミニウムもしくはアルミニウムの合金で構成された芯線であって流れる電流が通常の電流よりも低い芯線が接続されるワイヤバレル部を備えた微電流用圧着端子において、鉄もしくは耐食性を備えた鉄合金で構成された母材と、少なくとも、前記ワイヤバレル部を構成する前記母材の部位の表面に設けられた第１の層と、少なくとも、前記第１の層の表面に設けられた第２の層とを有し、前記第１の層は、前記母材の表面に存在する不動態膜を除去する材料からなり、前記第２の層は、耐食性と潤滑性とを高めることができるとともに、電気抵抗の値を安定化させる材料からなる微電流用圧着端子である。   The invention described in claim 1 is a crimp terminal for fine current comprising a wire barrel portion connected to a core wire made of aluminum or an alloy of aluminum and having a current flowing lower than a normal current. Or the base material comprised with the iron alloy provided with corrosion resistance, the 1st layer provided in the surface of the site | part of the base material which comprises the said wire barrel part at least, The surface of the said 1st layer at least The first layer is made of a material that removes the passive film present on the surface of the base material, and the second layer has corrosion resistance and lubricity. It is a crimp terminal for minute current made of a material that can increase the resistance and stabilize the value of electric resistance.

請求項２に記載の発明は、請求項１に記載の微電流用圧着端子において、前記第１の層は、ニッケルで構成されており、前記第２の層は、錫もしくは銀もしくは金で構成されている微電流用圧着端子である。   The invention according to claim 2 is the crimp terminal for fine current according to claim 1, wherein the first layer is made of nickel, and the second layer is made of tin, silver, or gold. It is a crimp terminal for fine current.

請求項３に記載の発明は、請求項１または請求項２に記載の微電流用圧着端子おいて、前記ワイヤバレル部に接続される芯線は、０．１３ｓｑ〜０．５ｓｑのサイズであり、前記ワイヤバレル部に接続される芯線を流れる電流値が３．５Ａ以下である微電流用圧着端子である。   The invention according to claim 3 is the crimp terminal for fine current according to claim 1 or claim 2, wherein the core wire connected to the wire barrel portion has a size of 0.13 sq to 0.5 sq, It is a crimp terminal for minute current whose value of current flowing through the core wire connected to the wire barrel portion is 3.5 A or less.

請求項４に記載の発明は、アルミニウムもしくはアルミニウムの合金で構成された芯線であって流れる電流が通常の電流よりも低い芯線が接続されるワイヤバレル部を備えた微電流用圧着端子の製造方法において、鉄もしくは耐食性を備えた鉄合金で構成された母材の表面に、前記母材の表面に存在する不動態膜を除去する材料からなる第１の層を設ける第１の層設置工程と、前記第１の層設置工程で設けられた第１の層の表面に、耐食性と潤滑性とを高めることができるとともに電気抵抗の値を安定化させる材料からなる第２の層を設ける第２の層設置工程と、前記第１の層設置工程と前記第２の層設置工程とで第１の層と第２の層とが設けられた母材を成形する成形工程とを有する圧着端子の製造方法である。   According to a fourth aspect of the present invention, there is provided a method of manufacturing a crimp terminal for fine current comprising a wire barrel portion connected to a core wire made of aluminum or an alloy of aluminum and having a lower flowing current than a normal current. A first layer installation step of providing a first layer made of a material for removing a passive film present on the surface of the base material on the surface of the base material made of iron or an iron alloy having corrosion resistance; A second layer is provided on the surface of the first layer provided in the first layer installation step. The second layer is made of a material that can enhance corrosion resistance and lubricity and stabilize the value of electrical resistance. A crimping terminal comprising: a step of forming a base material provided with a first layer and a second layer in the first layer setting step and the second layer setting step It is a manufacturing method.

請求項５に記載の発明は、請求項１〜請求項３のいずれか１項に記載の微電流用圧着端子と、前記芯線が前記ワイヤバレル部に接続されている電線とを有する微電流用ワイヤハーネスである。   The invention according to claim 5 is for fine current, comprising the crimp terminal for fine current according to any one of claims 1 to 3 and an electric wire in which the core wire is connected to the wire barrel portion. It is a wire harness.

請求項６に記載の発明は、請求項５に記載の微電流用ワイヤハーネスにおいて、微小電流用回路に使用される微電流用ワイヤハーネスである。   The invention according to claim 6 is the wire harness for minute current used in the circuit for minute current in the wire harness for minute current according to claim 5.

本発明によれば、構成が簡素であり、長年の使用によっても腐食しづらく、母材が銅に比べて電気抵抗値が大きいステンレススチールで構成されていても、微電流を流すことで温度上昇や、温度上昇による電気抵抗値の上昇を抑制することができる微電流用圧着端子および微電流用ワイヤハーネスを提供することができる。   According to the present invention, the structure is simple, it is difficult to corrode even after many years of use, and even if the base material is made of stainless steel having a larger electrical resistance value than copper, the temperature rises by passing a small current In addition, it is possible to provide a fine current crimp terminal and a fine current wire harness capable of suppressing an increase in electrical resistance value due to a temperature rise.

本発明の実施形態に係る微電流用圧着端子の平面図である。It is a top view of the crimp terminal for fine currents concerning the embodiment of the present invention. 本発明の実施形態に係る微電流用圧着端子の正面図である。It is a front view of the crimp terminal for fine currents concerning the embodiment of the present invention. 本発明の実施形態に係る微電流用圧着端子を用いたワイヤハーネスの斜視図である。It is a perspective view of the wire harness using the crimp terminal for fine currents concerning the embodiment of the present invention. 本発明の実施形態に係る微電流用圧着端子を用いたワイヤハーネスの断面図である。It is sectional drawing of the wire harness using the crimp terminal for fine electric current which concerns on embodiment of this invention. 図４におけるＶ部の拡大図である。It is an enlarged view of the V section in FIG. 従来の圧着端子を示す図である。It is a figure which shows the conventional crimp terminal.

本発明の実施形態に係る微電流用圧着端子１は、図３、図４で示すように、電線（たとえば、微電流用電線）Ｗに接続されて使用されるものであり、電線Ｗの芯線（導体）ｗ１は、たとえば、アルミニウムもしくはアルミニウムの合金で構成されている。また、芯線ｗ１とこの芯線ｗ１に接続された微電流用圧着端子１には、通常の電流よりも低い値の電流が流れるようになっている。微電流用圧着端子（電気信号伝達用圧着端子）１が設置（接続）された電線Ｗは、微電流用ワイヤハーネス（たとえば自動車で信号を伝達するためのワイヤハーネス）ＷＨとなる。微電流用ワイヤハーネスＷＨは、たとえば、微小電流用回路に接続されて使用される。   The fine current crimp terminal 1 according to the embodiment of the present invention is used by being connected to an electric wire (for example, a fine current electric wire) W as shown in FIGS. 3 and 4. (Conductor) w1 is made of, for example, aluminum or an alloy of aluminum. In addition, a current having a value lower than a normal current flows through the core wire w1 and the crimp terminal 1 for fine current connected to the core wire w1. The electric wire W on which the fine current crimp terminal (electric signal transmission crimp terminal) 1 is installed (connected) becomes a fine current wire harness (for example, a wire harness for transmitting a signal in an automobile) WH. The minute current wire harness WH is used by being connected to a minute current circuit, for example.

また、微電流用圧着端子１は、表面に第１の層３３と第２の層３５とが設けられている導電性金属材の母材（基材）３１（図５参照）を、プレス加工で所定形状に打ち抜き、この所定形状の導電性金属材を折り曲げ加工することによって形成されている（図１、図２参照）。第１の層３３は、母材３１の表面に存在する不動態膜を除去する材料からなり、第２の層３５は、耐食性と潤滑性とを高めることができるとともに、電気抵抗の値を安定化させる材料からなる。なお、図４では、図が不鮮明になることを避けるために、第１の層３３と第２の層３５との表示を省略している。   Further, the crimp terminal 1 for fine current is formed by pressing a base material (base material) 31 (see FIG. 5) of a conductive metal material having a first layer 33 and a second layer 35 on the surface. This is formed by punching into a predetermined shape and bending the conductive metal material of the predetermined shape (see FIGS. 1 and 2). The first layer 33 is made of a material that removes the passive film present on the surface of the base material 31, and the second layer 35 can enhance corrosion resistance and lubricity, and can stabilize the value of electric resistance. It consists of a material to be converted. In FIG. 4, the display of the first layer 33 and the second layer 35 is omitted in order to prevent the figure from becoming unclear.

母材３１は、鉄もしくは耐食性を備えた鉄合金（たとえばステンレススチール）で構成されている。さらに説明すると、母材３１は、平板状の素材に、塑性加工（切削加工を除く、打ち抜き加工、曲げ加工、プレス加工等）を施すことで、微電流用圧着端子１の形状になっている。第１の層３３と第２の層３５とは、母材３１に上記塑性加工を施す前に設けられたものである。   The base material 31 is made of iron or an iron alloy (for example, stainless steel) having corrosion resistance. More specifically, the base material 31 has the shape of the crimp terminal 1 for microcurrent by applying plastic processing (excluding cutting processing, punching processing, bending processing, press processing, etc.) to a flat plate-shaped material. . The first layer 33 and the second layer 35 are provided before the plastic working is performed on the base material 31.

微電流用圧着端子１は、図１、図２等で示すように、微電流用相手端子（図示せず）との接続を行う相手端子接続部２と、電線Ｗに圧着する電線圧着部１０と、相手端子接続部２と電線圧着部１０間を連結する連結部２０とを備えている。   As shown in FIGS. 1, 2, and the like, the fine current crimping terminal 1 includes a mating terminal connecting portion 2 for connecting to a mating terminal for fine current (not shown), and a wire crimping portion 10 for crimping the wire W. And the connection part 20 which connects between the other party terminal connection part 2 and the electric wire crimping | compression-bonding part 10 is provided.

相手端子接続部２は、メス端子形状であり、四角枠形状の箱部（筒状部）３とこの箱部３内に配置された弾性ばね接点部２１とを有する。微電流用相手端子であるオス端子（図示せず）が箱部３内に挿入され、挿入されたオス端子が弾性ばね接点部２１にばね力によって微電流用圧着端子１に接触するようになっている。   The mating terminal connection portion 2 has a female terminal shape, and includes a rectangular frame-shaped box portion (tubular portion) 3 and an elastic spring contact portion 21 disposed in the box portion 3. A male terminal (not shown), which is a counterpart terminal for minute current, is inserted into the box portion 3, and the inserted male terminal comes into contact with the crimp terminal 1 for minute current by the spring force on the elastic spring contact portion 21. ing.

電線圧着部１０は、ワイヤバレル部（芯線加締め部；導体接続部）３７とインシュレーションバレル部（外被加締め部）３９とを有する。ワイヤバレル部３７がカシメられることで、ワイヤバレル部３７が電線Ｗの芯線ｗ１が接続されるようになっている。インシュレーションバレル部３９がカシメられることで、インシュレーションバレル部３９が電線Ｗの外皮ｗ２を保持するようになっている。   The wire crimping portion 10 has a wire barrel portion (core wire crimping portion; conductor connection portion) 37 and an insulation barrel portion (outer sheath crimping portion) 39. By crimping the wire barrel portion 37, the core wire w <b> 1 of the electric wire W is connected to the wire barrel portion 37. The insulation barrel portion 39 is configured to hold the outer skin w <b> 2 of the electric wire W by the crimping of the insulation barrel portion 39.

第１の層３３は、ニッケルで構成されており、たとえば、メッキによって母材３１を覆うようにして母材３１に設けられている。第２の層３５は、錫で構成されており、たとえば、メッキによって第１の層３３を覆うようにして第１の層３３（母材３１）に設けられている（図５参照）。   The first layer 33 is made of nickel, and is provided on the base material 31 so as to cover the base material 31 by plating, for example. The second layer 35 is made of tin, and is provided on the first layer 33 (base material 31) so as to cover the first layer 33 by plating, for example (see FIG. 5).

第１の層３３（ニッケル層）の厚さは、０．２μｍ〜３μｍの範囲内になっており、第２の層３５（錫層）の厚さは、０．８μｍ〜３μｍの範囲内になっている。   The thickness of the first layer 33 (nickel layer) is in the range of 0.2 μm to 3 μm, and the thickness of the second layer 35 (tin layer) is in the range of 0.8 μm to 3 μm. It has become.

微電流用圧着端子１では、母材３１の表面の全面に第１の層３３と第２の層３５とが設けられているが、第１の層３３、第２の層３５が、少なくとも、ワイヤバレル部３７を構成する母材３１の部位の表面を覆うようにして母材３１に設けられていてもよい。さらに、芯線ｗ１が接続されているときに芯線ｗ１と接触する部位のみに第１の層３３と第２の層３５とが設けられていてもよい。   In the microcurrent crimp terminal 1, the first layer 33 and the second layer 35 are provided on the entire surface of the base material 31, but the first layer 33 and the second layer 35 are at least The wire 31 may be provided on the base material 31 so as to cover the surface of the base material 31 constituting the wire barrel portion 37. Furthermore, the first layer 33 and the second layer 35 may be provided only in a portion that contacts the core wire w1 when the core wire w1 is connected.

また、第２の層３５を、錫に代えて、銀もしくは金で構成してもよい。   Further, the second layer 35 may be made of silver or gold instead of tin.

ワイヤバレル部３７に接続される芯線ｗ１は、０．１３ｓｑ〜０．５ｓｑのサイズになっている。さらに説明すると、芯線ｗ１は、細長い円柱状の複数本（たとえば８〜１２本）の素線が集合して構成されているが、上記複数本の素線総ての断面（長手方向に対して直交する平面による断面）の合計面積が０．１３ｍｍ２〜０．５ｍｍ２になっている。 The core wire w1 connected to the wire barrel portion 37 has a size of 0.13 sq to 0.5 sq. More specifically, the core wire w1 is configured by a collection of a plurality of elongated cylindrical (for example, 8 to 12) strands, but the cross section of all the strands (with respect to the longitudinal direction). the total area of the cross section) by orthogonal planes is in 0.13 mm 2 to 0.5 mm 2.

また、ワイヤバレル部３７に接続される芯線ｗ１を流れる電流値が３．５Ａ以下になっている（０Ａよりも大きく３．５Ａ以下になっている）。なお、微電流用ワイヤハーネスＷＨを流れる電流値も３．５Ａ以下になっている。   Further, the value of the current flowing through the core wire w1 connected to the wire barrel portion 37 is 3.5 A or less (greater than 0 A and 3.5 A or less). The value of the current flowing through the minute current wire harness WH is also 3.5 A or less.

ここで、微電流用圧着端子１の製造方法について説明する。   Here, the manufacturing method of the crimp terminal 1 for minute electric current is demonstrated.

まず、鉄もしくは耐食性を備えた鉄合金で構成された母材３１（たとえば平板状の母材）の表面に、母材３１の表面に存在する不動態膜を除去する材料からなる第１の層３３を設ける（第１の層設置工程）。   First, a first layer made of a material for removing a passive film existing on the surface of the base material 31 on the surface of the base material 31 (for example, a flat base material) made of iron or an iron alloy having corrosion resistance. 33 is provided (first layer installation step).

続いて、第１の層設置工程で設けられた第１の層３３の表面に、耐食性と潤滑性とを高めることができるとともに電気抵抗の値を安定化させる材料からなる第２の層３５を設ける（第２の層設置工程）。   Subsequently, on the surface of the first layer 33 provided in the first layer installation step, a second layer 35 made of a material that can enhance corrosion resistance and lubricity and stabilize the value of electrical resistance is provided. Provided (second layer installation step).

続いて、第１の層設置工程と第２の層設置工程とで第１の層３３と第２の層３５とが設けられた母材３１を成形する（成形工程）。   Subsequently, the base material 31 provided with the first layer 33 and the second layer 35 is formed in the first layer installation step and the second layer installation step (molding step).

微電流用圧着端子１によれば、構成が簡素であり、長年の使用によっても腐食しづらく、母材が銅に比べて電気抵抗値が大きいステンレススチールで構成されていても、微電流を流すことで温度上昇や、温度上昇による電気抵抗値の上昇を抑制することができる。   According to the crimp terminal 1 for minute current, the structure is simple, it is difficult to corrode even after many years of use, and even if the base material is composed of stainless steel having a larger electric resistance value than copper, a minute current flows. As a result, it is possible to suppress a temperature rise and an increase in electrical resistance value due to the temperature rise.

微電流用圧着端子１によれば、ステンレススチールで構成された母材３１が、ニッケル層および錫層で覆われているので、アルミニウム製もしくはアルミニウム合金製の芯線ｗ１が接続された場合であっても、微電流用圧着端子１と電線Ｗ（芯線ｗ１）間の電位差が小さく、微電流用圧着端子１からの錫の溶出や芯線ｗ１からのアルミニウムの溶出がほぼ無くなり、長年の使用によっても腐食がしづらくなる。また、特許文献１の端子のような導通部材が存在しないので、構成が簡素化されている。   According to the microcurrent crimp terminal 1, since the base material 31 made of stainless steel is covered with the nickel layer and the tin layer, the core wire w1 made of aluminum or aluminum alloy is connected. However, the potential difference between the crimp terminal 1 for fine current and the electric wire W (core wire w1) is small, and the elution of tin from the crimp terminal 1 for fine current and the dissolution of aluminum from the core wire w1 are almost eliminated. It becomes difficult to do. Moreover, since there is no conducting member like the terminal of Patent Document 1, the configuration is simplified.

また、微電流用圧着端子１においては、母材３１が銅に比べて電気抵抗の値が大きいステンレススチールで構成されていても、微電流しか流さないので温度上昇や、温度上昇による電気抵抗値の上昇等の不具合が発生しないようになっている。   Further, in the crimp terminal 1 for minute current, even if the base material 31 is made of stainless steel having a larger electric resistance value than copper, only a minute current flows, so that the temperature rises and the electric resistance value due to the temperature rise. It is designed to prevent problems such as rising.

また、微電流用圧着端子１によれば、第１の層３３をニッケルで構成しているので、ステンレススチールで構成された母材３１の表面に存在していた電気抵抗の大きい不動態膜を除去して第１の層３３を母材３１に設けることができる。   Moreover, according to the crimp terminal 1 for minute current, since the first layer 33 is made of nickel, the passive film having a large electric resistance that exists on the surface of the base material 31 made of stainless steel is used. The first layer 33 can be provided on the base material 31 by removing.

ところで、母材３１は、上述したように、平板状の素材を成形することで形成されており、第１の層３３と第２の層３５とは、母材３１を成形する前に設けられたものである。   By the way, the base material 31 is formed by molding a flat material as described above, and the first layer 33 and the second layer 35 are provided before the base material 31 is molded. It is a thing.

詳しく説明すると、第１の層３３と第２の層３５とが設けられていない平板状の素材を打ち抜き加工して平板状の所定の形状にした後、平板状の所定の形状のものの全面に第１の層３３と第２の層３５とを設け、第１の層３３と第２の層３５とが設けられたものに、曲げ加工、プレス加工等を施すことで、微電流用圧着端子１を成形している。   More specifically, after a flat plate material not provided with the first layer 33 and the second layer 35 is punched into a predetermined shape, the entire surface of the predetermined plate shape is formed. By providing the first layer 33 and the second layer 35 and bending or pressing the first layer 33 and the second layer 35, a fine current crimp terminal 1 is molded.

ニッケル層３３と錫層３５とを母材３１が成形される前（平板状の素材）に設けることで、ニッケル層３３と錫層３５との厚さが均一になって品質が安定するとともに、微電流用圧着端子１の製造をし易くなる。   By providing the nickel layer 33 and the tin layer 35 before the base material 31 is formed (a plate-shaped material), the thickness of the nickel layer 33 and the tin layer 35 becomes uniform, and the quality is stabilized. It becomes easy to manufacture the crimp terminal 1 for minute current.

なお、第１の層３３と第２の層３５とが厚さ方向の両面に予め設けられている平板状の素材を打ち抜き加工して平板状の所定の形状にした後、平板状の所定の形状のものに、曲げ加工、プレス加工等を施すことで、微電流用圧着端子１が成形されてもよい。   The first layer 33 and the second layer 35 are punched from a flat plate material provided in advance on both sides in the thickness direction to obtain a predetermined flat plate shape, and then a predetermined flat plate shape. The fine current crimp terminal 1 may be formed by bending or pressing the shape.

また、第１の層３３と第２の層３５とを成形後に設けてもよい。すなわち、第１の層３３と第２の層３５とが設けられていない平板状の素材を打ち抜き加工して平板状の所定の形状にした後、平板状の所定の形状のものに、曲げ加工、プレス加工等を施し、曲げ加工、プレス加工等を施したものの表面の全面に第１の層３３と第２の層３５とを設け、微電流用圧着端子１が製造されていてもよい。   Further, the first layer 33 and the second layer 35 may be provided after molding. That is, after a flat plate material not provided with the first layer 33 and the second layer 35 is punched into a predetermined flat plate shape, it is bent into a predetermined flat plate shape. The fine current crimping terminal 1 may be manufactured by providing the first layer 33 and the second layer 35 on the entire surface of the surface subjected to press working or the like and subjected to bending or pressing.

１ 微電流用圧着端子
３１ 母材
３３ 第１の層
３５ 第２の層
３７ ワイヤバレル部
Ｗ 電線
ｗ１ 芯線
ＷＨ 微電流用ワイヤハーネス
DESCRIPTION OF SYMBOLS 1 Crimp terminal for fine currents 31 Base material 33 1st layer 35 2nd layer 37 Wire barrel part W Electric wire w1 Core wire WH Wire harness for fine currents

Claims (6)

アルミニウムもしくはアルミニウムの合金で構成された芯線であって流れる電流が通常の電流よりも低い芯線が接続されるワイヤバレル部を備えた微電流用圧着端子において、
鉄もしくは耐食性を備えた鉄合金で構成された母材と、
少なくとも、前記ワイヤバレル部を構成する前記母材の部位の表面に設けられた第１の層と、
少なくとも、前記第１の層の表面に設けられた第２の層と、
を有し、前記第１の層は、前記母材の表面に存在する不動態膜を除去する材料からなり、前記第２の層は、耐食性と潤滑性とを高めることができるとともに、電気抵抗の値を安定化させる材料からなることを特徴とする微電流用圧着端子。 In a crimp terminal for fine current comprising a wire barrel portion to which a core wire composed of aluminum or an alloy of aluminum and having a current flowing lower than a normal current is connected,
A base material composed of iron or an iron alloy with corrosion resistance;
At least a first layer provided on a surface of a portion of the base material constituting the wire barrel portion;
At least a second layer provided on the surface of the first layer;
And the first layer is made of a material that removes the passive film present on the surface of the base material, and the second layer can improve corrosion resistance and lubricity, and also has an electrical resistance. A crimp terminal for a minute current, characterized by comprising a material that stabilizes the value of. 請求項１に記載の微電流用圧着端子において、
前記第１の層は、ニッケルで構成されており、前記第２の層は、錫もしくは銀もしくは金で構成されていることを特徴とする微電流用圧着端子。 In the crimp terminal for microcurrent according to claim 1,
The first layer is made of nickel, and the second layer is made of tin, silver, or gold. 請求項１または請求項２に記載の微電流用圧着端子おいて、
前記ワイヤバレル部に接続される芯線は、０．１３ｓｑ〜０．５ｓｑのサイズであり、
前記ワイヤバレル部に接続される芯線を流れる電流値が３．５Ａ以下であることを特徴とする微電流用圧着端子。 In the crimp terminal for microcurrent according to claim 1 or 2,
The core wire connected to the wire barrel portion has a size of 0.13 sq to 0.5 sq,
A crimp terminal for minute current, wherein a current value flowing through the core wire connected to the wire barrel portion is 3.5 A or less. アルミニウムもしくはアルミニウムの合金で構成された芯線であって流れる電流が通常の電流よりも低い芯線が接続されるワイヤバレル部を備えた微電流用圧着端子の製造方法において、
鉄もしくは耐食性を備えた鉄合金で構成された母材の表面に、前記母材の表面に存在する不動態膜を除去する材料からなる第１の層を設ける第１の層設置工程と、
前記第１の層設置工程で設けられた第１の層の表面に、耐食性と潤滑性とを高めることができるとともに電気抵抗の値を安定化させる材料からなる第２の層を設ける第２の層設置工程と、
前記第１の層設置工程と前記第２の層設置工程とで第１の層と第２の層とが設けられた母材を成形する成形工程と、
を有することを特徴とする圧着端子の製造方法。 In the method of manufacturing a crimp terminal for fine current comprising a wire barrel portion to which a core wire composed of aluminum or an alloy of aluminum and having a current flowing lower than a normal current is connected,
A first layer installation step of providing a first layer made of a material for removing a passive film present on the surface of the base material on the surface of the base material composed of iron or an iron alloy having corrosion resistance;
A second layer is provided on the surface of the first layer provided in the first layer installation step. The second layer is made of a material that can enhance corrosion resistance and lubricity and stabilize the value of electrical resistance. Layer installation process;
A molding step of molding the base material provided with the first layer and the second layer in the first layer installation step and the second layer installation step;
The manufacturing method of the crimp terminal characterized by having. 請求項１〜請求項３のいずれか１項に記載の微電流用圧着端子と、
前記芯線が前記ワイヤバレル部に接続されている電線と、
を有することを特徴とする微電流用ワイヤハーネス。 The crimp terminal for microcurrent according to any one of claims 1 to 3,
An electric wire in which the core wire is connected to the wire barrel portion;
A wire harness for microcurrent, comprising: 請求項５に記載の微電流用ワイヤハーネスにおいて、
微小電流用回路に使用されることを特徴とする微電流用ワイヤハーネス。
In the wire harness for microcurrents according to claim 5,
A wire harness for minute current, characterized by being used in a circuit for minute current.
JP2014103639A 2014-05-19 2014-05-19 Crimp-style terminal for fine current, and wire harness for fine current Abandoned JP2015220146A (en)

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013161526A (en) * 2012-02-01 2013-08-19 Auto Network Gijutsu Kenkyusho:Kk Terminal metal fitting
JP2013243106A (en) * 2012-04-23 2013-12-05 Auto Network Gijutsu Kenkyusho:Kk Terminal, and electric wire with terminal

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013161526A (en) * 2012-02-01 2013-08-19 Auto Network Gijutsu Kenkyusho:Kk Terminal metal fitting
JP2013243106A (en) * 2012-04-23 2013-12-05 Auto Network Gijutsu Kenkyusho:Kk Terminal, and electric wire with terminal

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