JP4405791B2 - Cable connector - Google Patents

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JP4405791B2
JP4405791B2 JP2003399901A JP2003399901A JP4405791B2 JP 4405791 B2 JP4405791 B2 JP 4405791B2 JP 2003399901 A JP2003399901 A JP 2003399901A JP 2003399901 A JP2003399901 A JP 2003399901A JP 4405791 B2 JP4405791 B2 JP 4405791B2
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cable
plating layer
cable connector
layer
plating
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JP2005166289A (en
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毅 田窪
照一 本田
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Mitsubishi Cable Industries Ltd
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Description

本発明はケーブル用コネクタ、特に高周波同軸ケーブル用コネクタに関する。   The present invention relates to a cable connector, and more particularly to a high frequency coaxial cable connector.

ケーブルを電気機器に接続したり、複数のケーブル同士を結合したりする場合には、ケーブルの末端に金属端子(ハウジング)を有するケーブル用コネクタが設けられる。ハウジングは電気機器への接続具(フランジ等)と、前記接続具とケーブルとを接続するシェルとを備えていて、切削性(加工性)やコスト等の観点から上記シェルの金属としては快削黄銅等が好ましく用いられる(特許文献1)。該金属の表面には高周波電流に対する高い導電性を付与するために、通常、銀めっきが施される。しかし、現在の工業技術では、銀めっきを施しただけではめっきはピンホールの発生が避け難い。よって、厳しい腐食環境(例えば、海塩粒子が多い海岸地帯、NOxやSOx等といった腐食性ガスが多い工業地帯、あるいは、硫黄化合物が多い温泉地帯など)においては銀めっきのみが施された金属の耐食性は不充分である。   When connecting a cable to an electric device or connecting a plurality of cables, a cable connector having a metal terminal (housing) at the end of the cable is provided. The housing includes a connection tool (flange, etc.) to an electrical device and a shell for connecting the connection tool and the cable. From the viewpoint of machinability (workability) and cost, the metal of the shell is free-cutting. Brass or the like is preferably used (Patent Document 1). The surface of the metal is usually subjected to silver plating in order to impart high conductivity against high frequency current. However, with the current industrial technology, it is difficult to avoid the occurrence of pinholes simply by applying silver plating. Therefore, in severe corrosive environments (for example, coastal areas with a lot of sea salt particles, industrial areas with a lot of corrosive gases such as NOx and SOx, or hot spring areas with a lot of sulfur compounds, etc.) Corrosion resistance is insufficient.

そのため、ケーブル用コネクタの金属には、銀めっきの下地にニッケルめっきを施した二層めっきが施される。しかし、二層めっきを施しても、金属の耐食性はまだ充分ではない。
特開2002−88428号公報 特開2000−119775号公報
Therefore, the metal of the cable connector is subjected to two-layer plating in which a nickel plating is applied to a silver plating base. However, even if two-layer plating is performed, the corrosion resistance of the metal is not yet sufficient.
JP 2002-88428 A JP 2000-119775 A

本発明は、従来よりも耐食性の高いケーブル用コネクタを提供することを目的とする。   An object of this invention is to provide the connector for cables with higher corrosion resistance than before.

本発明は以下の特徴を有する。
(1)ケーブルと電気機器とを電気的に接続するためのハウジングを有するケーブル用コネクタであって、
ハウジングは電気機器への接続具と、前記接続具とケーブルとを接続するシェルとを備え、
シェルは、自体の構造を形成するための土台となっている金属製ベース部と、該ベース部の表面に順に形成されたニッケルめっき層と銀めっき層とを有し、
前記ニッケルめっき層、銀めっき層の層厚は各々5μm以上であり、かつ、銀めっき層の表面粗さは最大高さ(Rz)で6.3s以下である、
ケーブル用コネクタ。
(2)上記金属製ベース部が鉛を含有しない快削黄銅からなる上記(1)記載のケーブル用コネクタ。
(3)高周波同軸ケーブル用である上記(1)または(2)記載のケーブル用コネクタ。
The present invention has the following features.
(1) A cable connector having a housing for electrically connecting a cable and an electric device,
The housing includes a connection tool to an electrical device, and a shell connecting the connection tool and the cable,
The shell has a metal base portion serving as a base for forming its own structure, and a nickel plating layer and a silver plating layer sequentially formed on the surface of the base portion,
The thicknesses of the nickel plating layer and the silver plating layer are each 5 μm or more, and the surface roughness of the silver plating layer is 6.3 s or less at the maximum height (Rz).
Connector for cable.
(2) The cable connector according to (1), wherein the metal base portion is made of free-cutting brass containing no lead.
(3) The cable connector according to the above (1) or (2), which is for a high-frequency coaxial cable.

本発明により、耐食性が向上したケーブル用コネクタが提供される。   According to the present invention, a cable connector having improved corrosion resistance is provided.

本発明のケーブル用コネクタは、ハウジングを有し、ハウジングは電気機器への接続具(フランジ等)と、前記接続具とケーブルとを接続するシェルとを備えていて、シェルは、自体の構造を形成するための土台となっている金属製ベース部と、該ベース部の表面に順に形成されたニッケルめっき層と銀めっき層とを有し、前記各めっき層の層厚および銀めっき層の表面粗さは後述する所定の値を有している。図1は、本発明のケーブル用コネクタの断面図(1/2)を表す。このケーブル用コネクタ1は、ボルト等(図示せず)を使用してアンテナや通信機器(図示せず)等に接続されるフランジ11(接続具)を有する。シェル12はフランジ11とケーブル2とを電気的、機械的に接続している。さらに、シェル12とカップリング13を結合することで、クランプ15で支持されたケーブル2が固定される。符号14は中心コンタクトを表し、符号16はシールリングを表す。図1の態様のケーブル用コネクタ1におけるハウジングは、フランジ11、シェル12およびカップリング13からなるが、本発明のケーブル用コネクタ1のハウジングはこのような構成に限られず、ケーブルと接続するシェル12および電気機器と接続する接続具11を有していればよい。このシェル12および接続具11を介してケーブルと電気的に接続される電気機器は上述したアンテナや通信機器に限られず、種々の電気機器を任意に用いることができる。接続具11としては、図示するようなフランジ以外に、プラグ/ジャック、ねじカップリング、バヨネットロック等が例示される。   The cable connector of the present invention includes a housing, and the housing includes a connection tool (such as a flange) to an electrical device, and a shell for connecting the connection tool and the cable, and the shell has its own structure. A metal base part serving as a base for forming; a nickel plating layer and a silver plating layer formed in order on the surface of the base part; and the thickness of each plating layer and the surface of the silver plating layer The roughness has a predetermined value described later. FIG. 1 shows a cross-sectional view (1/2) of the cable connector of the present invention. The cable connector 1 has a flange 11 (connector) connected to an antenna, a communication device (not shown) or the like using a bolt or the like (not shown). The shell 12 electrically and mechanically connects the flange 11 and the cable 2. Furthermore, the cable 2 supported by the clamp 15 is fixed by coupling the shell 12 and the coupling 13. Reference numeral 14 represents a center contact, and reference numeral 16 represents a seal ring. The housing in the cable connector 1 of the embodiment shown in FIG. 1 includes the flange 11, the shell 12, and the coupling 13. However, the housing of the cable connector 1 of the present invention is not limited to such a configuration, and the shell 12 connected to the cable. In addition, it is only necessary to have the connection tool 11 connected to the electric device. The electric device that is electrically connected to the cable via the shell 12 and the connection tool 11 is not limited to the antenna and the communication device described above, and various electric devices can be arbitrarily used. Examples of the connection tool 11 include plugs / jacks, screw couplings, bayonet locks and the like in addition to the flanges shown in the drawings.

本発明のケーブル用コネクタが有するシェル12は、金属製ベース部と、該ベース部の表面に順に形成されたニッケルめっき層と銀めっき層とを有する。金属製ベース部は、シェル12を形成するための土台となっている。該ベース部を構成する金属材料としては特に限定なく、従来公知の金属材料を挙げることができる。なかでも、切削性(加工性)、コストの観点から、黄銅を用いるのが好ましい。黄銅のなかでも快削黄銅棒がより好ましい。   The shell 12 included in the cable connector of the present invention includes a metal base portion, and a nickel plating layer and a silver plating layer that are sequentially formed on the surface of the base portion. The metal base portion is a base for forming the shell 12. The metal material constituting the base portion is not particularly limited, and conventionally known metal materials can be exemplified. Especially, it is preferable to use brass from the viewpoint of machinability (workability) and cost. Among brass, a free-cutting brass rod is more preferable.

快削黄銅はJIS H 3250に規定される。快削黄銅は切削性が良好な黄銅である。一般的には快削黄銅は被削性を向上する目的で鉛が添加されていたが、近年では環境に対する負荷が少なくかつ被削性に優れた無鉛快削黄銅が開発されている。ここで、「無鉛快削黄銅」とは、鉛が添加されていない快削黄銅を意味する。鉛が添加されていないことは、JIS H 1053(銅および銅合金中の鉛定量方法)に記載された原子吸光法にて合金中の鉛量を測定してその値が0.5%以下であることによって確認できる。そのなかでも、被削性がさらに良好な点から、例えば、特許文献2に記載の快削黄銅や以下に列挙する快削黄銅がより好ましい。
(i)銅69〜80重量%、珪素2〜4重量%、リン0.02〜0.1重量%およびマグネシウム0.02〜0.1重量%を含有し、残部が亜鉛である快削黄銅。
(ii)スズ3.0〜4.5重量%、亜鉛1.5〜4.5重量%、リン0.01〜0.5重量%、鉄0.01〜0.5重量%、アンチモン0.01〜2.0重量%およびビスマス0.1〜2.5重量%を含有し、残部が銅である快削黄銅。
(iii)スズ3.0〜9.0重量%、亜鉛0.01〜6.0重量%、リン0.01〜0.5重量%、鉄0.01〜0.5重量%、アンチモン0.01〜2.0重量%およびビスマス0.1〜2.5重量%を含有し、残部が銅である快削黄銅。
(iv)カルシウム0.05〜1.5重量%、亜鉛1.0〜6.0重量%、スズ3.0〜9.0重量%およびリン0.01〜0.5重量%を含有し、残部が銅である快削黄銅。
Free-cutting brass is specified in JIS H 3250. Free-cutting brass is brass with good machinability. In general, free-cutting brass has lead added for the purpose of improving machinability. However, in recent years, lead-free free-cutting brass has been developed that has a low environmental burden and is excellent in machinability. Here, “lead-free free-cutting brass” means free-cutting brass to which lead is not added. The fact that lead is not added is that the amount of lead in the alloy is measured by the atomic absorption method described in JIS H 1053 (method for determining lead in copper and copper alloys) and the value is 0.5% or less. It can be confirmed by being. Among these, the free-cutting brass described in Patent Document 2 and the free-cutting brass listed below are more preferable from the viewpoint of even better machinability.
(I) Free-cutting brass containing 69 to 80% by weight of copper, 2 to 4% by weight of silicon, 0.02 to 0.1% by weight of phosphorus and 0.02 to 0.1% by weight of magnesium, with the balance being zinc .
(Ii) 3.0 to 4.5% by weight of tin, 1.5 to 4.5% by weight of zinc, 0.01 to 0.5% by weight of phosphorus, 0.01 to 0.5% by weight of iron, 0. Free-cutting brass containing 01-2.0% by weight and bismuth 0.1-2.5% by weight, the balance being copper.
(Iii) 3.0-9.0% by weight of tin, 0.01-6.0% by weight of zinc, 0.01-0.5% by weight of phosphorus, 0.01-0.5% by weight of iron, Free-cutting brass containing 01-2.0% by weight and bismuth 0.1-2.5% by weight, the balance being copper.
(Iv) containing 0.05 to 1.5 wt% calcium, 1.0 to 6.0 wt% zinc, 3.0 to 9.0 wt% tin and 0.01 to 0.5 wt% phosphorus, Free-cutting brass with the balance being copper.

金属材料は、その種類に応じた加工によって製品形状(所望のベース部の形状)に加工される。例えば、上述した黄銅を用いる場合は、通常、600〜800℃での熱間鍛造にて製品に近い形状にまで加工した後に、切削にて製品形状に加工することができる。上記熱間鍛造による加工を施さずに、黄銅棒から直接に切削加工を行ってもよい。   The metal material is processed into a product shape (a desired shape of the base portion) by processing according to the type. For example, when using the above-mentioned brass, it can usually be processed into a product shape by cutting after processing to a shape close to the product by hot forging at 600 to 800 ° C. You may cut directly from a brass bar, without performing the process by the said hot forging.

本発明のケーブル用コネクタのシェル12は、上記金属製ベース部に、該ベース部の表面から順にニッケルめっき層および銀めっき層が設けられる。すなわち、ベース部には二層めっきが施され、銀めっき層が最外層となる。ここで、「ベース部の表面」とは用時に外気に曝される面であって、図1の態様であれば太線で表した部分をさす。耐食性の向上の点から、上記めっき層の層厚は各々5μm以上であり、かつ、銀めっき層の表面粗さは最大高さ(Rz)で6.3s以下である。   In the cable connector shell 12 of the present invention, a nickel plating layer and a silver plating layer are provided on the metal base portion in order from the surface of the base portion. That is, the base part is subjected to two-layer plating, and the silver plating layer becomes the outermost layer. Here, the “surface of the base portion” is a surface that is exposed to the outside air during use, and in the case of FIG. From the viewpoint of improving corrosion resistance, the thicknesses of the plating layers are each 5 μm or more, and the surface roughness of the silver plating layer is 6.3 s or less at the maximum height (Rz).

後述する実施例から明らかなように、上述のニッケルめっき層および銀めっき層は各々5μm以上の層厚を有することが必要である。耐食性、寸法精度、経済性の観点から、ニッケルめっき層、銀めっき層の層厚は、各々独立に、好ましくは5〜20μmであり、より好ましくは5〜10μmである。めっき層の層厚は各めっき層を電気めっきにて設ける際に電解時間を制御すること(後述の実施例参照)や電流密度を変化させることなど、従来技術によって制御し得る。   As will be apparent from the examples described later, each of the above-described nickel plating layer and silver plating layer needs to have a layer thickness of 5 μm or more. From the viewpoint of corrosion resistance, dimensional accuracy, and economy, the thicknesses of the nickel plating layer and the silver plating layer are each independently preferably 5 to 20 μm, more preferably 5 to 10 μm. The thickness of the plating layer can be controlled by conventional techniques such as controlling the electrolysis time (see Examples described later) and changing the current density when each plating layer is provided by electroplating.

本明細書において、「銀めっき層の表面粗さ」とは、銀めっき層の外表面の表面粗さであり、JIS B 0601(2001)によって規定される最大高さ(Rz)で表される。Rzが小さい(すなわち、表面平滑性が高い)ほど、金属の腐食の原因となる(塩)水や海塩粒子の付着を抑制できることから、Rzは6.3s以下であることが必要であり、好ましくは3.2s以下であり、より好ましくは1.6s以下である。Rzは低いほど好ましいが、一般的には0.05s以上となる。   In this specification, the “surface roughness of the silver plating layer” is the surface roughness of the outer surface of the silver plating layer, and is represented by the maximum height (Rz) defined by JIS B 0601 (2001). . Since Rz is smaller (that is, surface smoothness is higher), the adhesion of (salt) water and sea salt particles that cause metal corrosion can be suppressed. Therefore, Rz needs to be 6.3 s or less. Preferably it is 3.2 s or less, More preferably, it is 1.6 s or less. Rz is preferably as low as possible, but is generally 0.05 s or more.

上記Rzは、表面粗さ測定機(ミツトヨ社製、SU−3000)を用いて求めることができる。   Said Rz can be calculated | required using a surface roughness measuring machine (the Mitutoyo company make, SU-3000).

「表面粗さ(Rz)が6.3s以下である銀めっき層」を得るには、金属製ベース部の金属材料の切削・研磨条件やめっき前処理の条件などを適宜選択すればよい。具体的な前処理条件としては、アルカリ(1%のNaOH、4%のNaCOおよび1%のNaSiOを含む水溶液)および酸(15%硫酸)による処理が例示される。 In order to obtain a “silver plating layer having a surface roughness (Rz) of 6.3 s or less”, cutting and polishing conditions for the metal material of the metal base portion, conditions for plating pretreatment, and the like may be selected as appropriate. Specific pretreatment conditions include treatment with an alkali (an aqueous solution containing 1% NaOH, 4% Na 2 CO 3 and 1% Na 2 SiO 4 ) and an acid (15% sulfuric acid).

本発明のケーブル用コネクタを製造する手段は特に限定はなく、例えば、上述したように、金属材料をベース部の形状に加工した後にめっき処理を施してケーブル用コネクタを製造してもよい。   The means for manufacturing the cable connector of the present invention is not particularly limited. For example, as described above, the metal material may be processed into the shape of the base portion and then plated to manufacture the cable connector.

本発明のケーブル用コネクタの形状も特に限定はなく、上述のハウジング(図1の符号11〜13)以外に、図1の符号14で表される中心コンタクトや、符号15で表されるクランプや符号16で表されるシールリング等があってもよいが必須ではない。   The shape of the cable connector according to the present invention is not particularly limited. In addition to the above-described housing (reference numerals 11 to 13 in FIG. 1), a center contact indicated by reference numeral 14 in FIG. There may be a seal ring or the like represented by reference numeral 16, but it is not essential.

上記のようなケーブル用コネクタが、同軸ケーブル用コネクタである場合、さらには高周波同軸ケーブル用コネクタである場合に本願発明のケーブル用コネクタを用いる意義が大きくなる。それは、メンテナンスが困難な屋外に設置され、長期にわたって使用される場合が多いからである。ここで、同軸ケーブル用コネクタとは、中心導体の外周に絶縁層と外部金属導体層を順次設けてなる構造のケーブルに用いられるコネクタである。高周波同軸ケーブル用コネクタとは、高周波数(数10kHz以上、特には1GHz以上であり、上限は特に制限されないが例えば100GHz)の電流を送電するための同軸ケーブルに用いられるコネクタである。   The significance of using the cable connector of the present invention increases when the cable connector as described above is a coaxial cable connector or even a high-frequency coaxial cable connector. This is because it is often installed outdoors that are difficult to maintain and used for a long time. Here, the coaxial cable connector is a connector used for a cable having a structure in which an insulating layer and an external metal conductor layer are sequentially provided on the outer periphery of a central conductor. The high-frequency coaxial cable connector is a connector used for a coaxial cable for transmitting a high-frequency current (several tens of kHz or more, particularly 1 GHz or more, although the upper limit is not particularly limited, for example, 100 GHz).

以下、実施例に基づいて、本発明についてさらに詳細に説明するが、本発明は実施例のみに限定されるものではない。   EXAMPLES Hereinafter, although this invention is demonstrated further in detail based on an Example, this invention is not limited only to an Example.

JIS H3250のC3604に適合する直径20mm、長さ100mmの無鉛快削黄銅を、図1の符号12で表されるシェルの形状に熱間鍛造、切削加工、研磨によって加工した。さらに、1%のNaOH、4%のNaCOおよび1%のNaSiOを含む水溶液)および酸(15%硫酸)を用いてめっき前処理を施した。その後、電気ニッケルめっき、電気銀めっきの順で表面処理を施してサンプルを製造した。 A lead-free free-cutting brass having a diameter of 20 mm and a length of 100 mm conforming to C3604 of JIS H3250 was processed into a shell shape represented by reference numeral 12 in FIG. 1 by hot forging, cutting, and polishing. Further, a plating pretreatment was performed using 1% NaOH, an aqueous solution containing 4% Na 2 CO 3 and 1% Na 2 SiO 4 ) and an acid (15% sulfuric acid). Then, the surface treatment was given in order of the electro nickel plating and the electro silver plating, and the sample was manufactured.

サンプルを製造した後に、その表面(図1にて太線で表される部分)のめっき層の層厚(任意の5箇所)をコクール膜厚計(コクール社製)で測定し、表面粗さ測定機(ミツトヨ社製、SU−3000)を用いて表面粗さ(最大高さ;Rz)を測定した。   After the sample is manufactured, the thickness of the plating layer (arbitrary 5 locations) on the surface (the portion indicated by the thick line in FIG. 1) is measured with a Kocourt film thickness meter (manufactured by Kocourt) to measure the surface roughness. The surface roughness (maximum height; Rz) was measured using a machine (manufactured by Mitutoyo Corporation, SU-3000).

各サンプルのめっき層の層厚はめっき処理における電解時間により、以下のように制御した。
Ni層厚1μm/Ag層厚1μmの二層めっきを施すには、Niめっき処理の電解時間を50秒とし、Agめっき処理の電解時間を15秒とした。
Ni層厚2μm/Ag層厚2μmの二層めっきを施すには、Niめっき処理の電解時間を100秒とし、Agめっき処理の電解時間を30秒とした。
Ni層厚4μm/Ag層厚4μmの二層めっきを施すには、Niめっき処理の電解時間を200秒とし、Agめっき処理の電解時間を60秒とした。
Ni層厚4μm/Ag層厚5μmの二層めっきを施すには、Niめっき処理の電解時間を200秒とし、Agめっき処理の電解時間を75秒とした。
Ni層厚5μm/Ag層厚4μmの二層めっきを施すには、Niめっき処理の電解時間を250秒とし、Agめっき処理の電解時間を60秒とした。
Ni層厚5μm/Ag層厚5μmの二層めっきを施すには、Niめっき処理の電解時間を250秒とし、Agめっき処理の電解時間を75秒とした。
Ni層厚6μm/Ag層厚6μmの二層めっきを施すには、Niめっき処理の電解時間を300秒とし、Agめっき処理の電解時間を90秒とした。
Ni層厚9μm/Ag層厚9μmの二層めっきを施すには、Niめっき処理の電解時間を450秒とし、Agめっき処理の電解時間を135秒とした。
The thickness of the plating layer of each sample was controlled as follows according to the electrolysis time in the plating treatment.
In order to perform two-layer plating with a Ni layer thickness of 1 μm / Ag layer thickness of 1 μm, the electrolysis time of Ni plating treatment was 50 seconds, and the electrolysis time of Ag plating treatment was 15 seconds.
In order to perform two-layer plating with a Ni layer thickness of 2 μm / Ag layer thickness of 2 μm, the electrolysis time of the Ni plating treatment was 100 seconds, and the electrolysis time of the Ag plating treatment was 30 seconds.
In order to perform two-layer plating with a Ni layer thickness of 4 μm / Ag layer thickness of 4 μm, the electrolysis time of the Ni plating treatment was 200 seconds, and the electrolysis time of the Ag plating treatment was 60 seconds.
In order to perform two-layer plating with a Ni layer thickness of 4 μm / Ag layer thickness of 5 μm, the electrolysis time of the Ni plating treatment was 200 seconds, and the electrolysis time of the Ag plating treatment was 75 seconds.
In order to perform two-layer plating with a Ni layer thickness of 5 μm / Ag layer thickness of 4 μm, the electrolysis time of the Ni plating treatment was 250 seconds, and the electrolysis time of the Ag plating treatment was 60 seconds.
In order to perform two-layer plating with a Ni layer thickness of 5 μm / Ag layer thickness of 5 μm, the electrolysis time of the Ni plating treatment was 250 seconds, and the electrolysis time of the Ag plating treatment was 75 seconds.
In order to apply two-layer plating with a Ni layer thickness of 6 μm / Ag layer thickness of 6 μm, the electrolysis time of the Ni plating treatment was 300 seconds, and the electrolysis time of the Ag plating treatment was 90 seconds.
In order to perform two-layer plating with a Ni layer thickness of 9 μm / Ag layer thickness of 9 μm, the electrolysis time of the Ni plating treatment was 450 seconds, and the electrolysis time of the Ag plating treatment was 135 seconds.

NC(NumericalControl)旋盤を用いて黄銅棒を切削・研磨することにより、各サンプルの銀めっき層の表面粗さ(Rz)を制御した。   The surface roughness (Rz) of the silver-plated layer of each sample was controlled by cutting and polishing a brass rod using an NC (Numerical Control) lathe.

各サンプルの耐食性の評価として、JIS Z 2371に順ずる塩水噴霧試験を行った。この試験では、5%の食塩水を35℃で1000時間噴霧した後のサンプルの腐食の程度をレイティングナンバー(RN)法によって定量化した(JIS Z 2371)。ここで、RNが0であることはサンプルの全面が腐食したことを意味し、RNが10であることはサンプルに腐食が認められなかったことを意味する。各サンプルのRNを表1にまとめる。   As an evaluation of the corrosion resistance of each sample, a salt spray test according to JIS Z 2371 was performed. In this test, the degree of corrosion of the sample after spraying 5% saline solution at 35 ° C. for 1000 hours was quantified by the rating number (RN) method (JIS Z 2371). Here, when RN is 0, it means that the entire surface of the sample is corroded, and when RN is 10, it means that no corrosion is observed in the sample. The RN for each sample is summarized in Table 1.

Figure 0004405791
Figure 0004405791

表1から明らかなように、本発明の実施例に相当するサンプル、すなわち、ニッケルめっき層、銀めっき層の層厚が各々5μm以上であり、かつ、銀めっき層の最大高さ(Rz)が6.3s以下であるサンプルは、それ以外のサンプルに比べ耐食性が良好である。その中でも、Rzが1.6sであるサンプルはさらに耐食性が向上し、上記試験において腐食が確認されないようになる。   As is apparent from Table 1, the samples corresponding to the examples of the present invention, that is, the nickel plating layer and the silver plating layer each have a thickness of 5 μm or more, and the maximum height (Rz) of the silver plating layer is Samples that are 6.3 s or less have better corrosion resistance than other samples. Among them, the sample having Rz of 1.6 s has further improved corrosion resistance, and corrosion is not confirmed in the above test.

本発明のケーブル用コネクタの一例を表す断面図(1/2)である。It is sectional drawing (1/2) showing an example of the connector for cables of this invention.

符号の説明Explanation of symbols

1 ケーブル用コネクタ
11 フランジ
12 シェル
13 カップリング
14 中心コンタクト
15 クランプ
16 シールリング
2 同軸ケーブル
1 Connector for cable 11 Flange 12 Shell 13 Coupling 14 Center contact 15 Clamp 16 Seal ring 2 Coaxial cable

Claims (6)

ケーブルと電気機器とを電気的に接続するためのハウジングを有するケーブル用コネクタであって、ハウジングは電気機器への接続具と、前記接続具とケーブルとを接続するシェルとを備え、
シェルは、自体の構造を形成するための土台となっている金属製ベース部と、該ベース部の表面に順に形成されたニッケルめっき層と銀めっき層とを有し、
前記ニッケルめっき層、銀めっき層の層厚は各々5〜20μmであり、かつ、銀めっき層の表面粗さは最大高さ(Rz)で0.05〜3.2sである、
ケーブル用コネクタ。
A cable connector having a housing for electrically connecting a cable and an electric device, the housing including a connector for the electric device, and a shell for connecting the connector and the cable,
The shell has a metal base portion serving as a base for forming its own structure, and a nickel plating layer and a silver plating layer sequentially formed on the surface of the base portion,
The nickel plating layer and the silver plating layer each have a thickness of 5 to 20 μm, and the surface roughness of the silver plating layer is 0.05 to 3.2 s at the maximum height (Rz).
Connector for cable.
銀めっき層の表面粗さは最大高さ(Rz)で0.05〜1.6sである、請求項1記載のケーブル用コネクタ。   The cable connector according to claim 1, wherein the surface roughness of the silver plating layer is 0.05 to 1.6 s at the maximum height (Rz). 前記金属製ベース部が鉛を含有しない快削黄銅からなる請求項1または2記載のケーブル用コネクタ。   The cable connector according to claim 1, wherein the metal base portion is made of free-cutting brass containing no lead. 銀めっき層が、切削・研磨により粗面化された金属製ベース部の加工面に形成されている請求項1〜3のいずれか1項記載のケーブル用コネクタ。   The cable connector according to any one of claims 1 to 3, wherein the silver plating layer is formed on the processed surface of the metal base portion roughened by cutting and polishing. 高周波同軸ケーブル用である請求項1〜4のいずれか1項記載のケーブル用コネクタ。   The cable connector according to any one of claims 1 to 4, which is for a high-frequency coaxial cable. JIS Z2371の方法に準じて、5%の食塩水を35℃で1000時間噴霧したのち、めっきされた前記金属製ベース部のJIS Z2371のレイティングナンバ法による評価が10である請求項1〜5のいずれか1項記載のケーブル用コネクタ。   According to the method of JIS Z2371, 5% saline solution is sprayed at 35 ° C. for 1000 hours, and then the evaluation by the rating number method of JIS Z2371 of the plated metal base part is 10. The cable connector according to any one of the preceding claims.
JP2003399901A 2003-11-28 2003-11-28 Cable connector Expired - Fee Related JP4405791B2 (en)

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