JPH06283076A - Manufacture of small electrical contact - Google Patents

Abstract

PURPOSE:To allow the efficient manufacture of a small electrical contact having a fine contact section by welding a cube type or spherical contact chip to a base material. CONSTITUTION:A fine ball 2 containing 30% of AgPd and having a diameter of 0.3mm is welded to the forward end section of a tape like base material 1 made 6f spring phosphor bronze having 0.1mm thickness, 0.15mm slit width and 0.5mm brush width. Thereafter, the ball 2 is subjected to a contact surface forming process and formed into oval shape as a fine contact section 3. As the section 3 is formed as a cube type or spherical contact chip in that way, the upper or reverse side thereof can be freely used, thereby ensuring the easy transport and fitting thereof to the predetermined position of the base material 1. At the same time, high dimensional accuracy can be ensured. Also, the contact surface or point of the section 3 becomes constant, thereby stabilizing weld strength and reducing the dispersion thereof. Also, automation can be easily applied, and a small electrical contact having the section 3 can be efficiently manufactured.

Description

【発明の詳細な説明】Detailed Description of the Invention

【０００１】[0001]

【産業上の利用分野】本発明は、小型電気接点の製造方
法に係り、特にエンコーダ等に用いられている精密接触
用の微小接触部を有した小型電気接点の製造方法に関す
るものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a small electric contact, and more particularly to a method for manufacturing a small electric contact having a minute contact portion for precision contact used in an encoder or the like.

【０００２】[0002]

【従来の技術】上記微小接触部を有した電気接点の製造
においては、薄い板厚の、しかも巾の狭いばね材からな
る台材端子での微小接触部となることから、従来のオー
バル型、クロスバー型、などの微小接点チップでの搬
送、溶接方式やリベット型での微小接点チップでの搬
送、カシメ方式では、取扱いや溶接又はカシメ加工では
煩雑でかつはなはだ困難であった。また接小なるが故に
微小接点チップの製作も困難で限界があった。また、台
材と接点材を予めインレイ等した複合材からのプレス加
工する方式では、ばね特性を必要とする為台材板厚が薄
いことから接点材を厚くできない等で未だ十分なもので
はなかった。また接点の高さを得る為に複合材の裏側か
ら突き出し加工を行うと、複合部界面での剥離や割れが
発生等していた。2. Description of the Related Art In the production of an electrical contact having the above-mentioned minute contact portion, since it is a minute contact portion at a base material terminal made of a spring material having a thin plate thickness and a narrow width, a conventional oval type, In the case of carrying with a micro-contact chip such as a crossbar type, carrying with a micro-contact chip of a welding system or rivet type, and the caulking system, handling, welding or caulking is complicated and very difficult. Moreover, since the contact size is small, it is difficult to manufacture a micro contact chip, and there is a limit. In addition, the method of press working from a composite material in which the base material and the contact material are inlaid beforehand is not sufficient because the contact material cannot be thickened because the base material plate thickness is thin because spring characteristics are required. It was Further, when the protrusion processing is performed from the back side of the composite material to obtain the height of the contact point, peeling or cracking occurs at the interface of the composite portion.

【０００３】[0003]

【発明が解決しようとする課題】本発明は上記課題を解
決すべくなされたもので、微小接触部を有した小型電気
接点を効率良く製造する方法を提供するものである。SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and provides a method for efficiently manufacturing a small-sized electrical contact having a minute contact portion.

【０００４】[0004]

【課題を解決するための手段】本発明は、立方体状ある
いは球状の接点チップにて台材に溶接することを特徴と
するものである。SUMMARY OF THE INVENTION The present invention is characterized in that a cubic or spherical contact tip is welded to a base material.

【０００５】[0005]

【作用】上記のように構成された小型電気接点の製造方
法によれば、立方体状あるいは球状の接点チップとする
ので、表裏自在となり台材の所定の位置までの搬送及び
設置が容易で寸法精度が優れており、更に、接触面ある
いは点が一定となり溶接強度が安定し、バラツキが少な
いものである。また、自動化がし易く微小接触部を有し
た小型電気接点が効率良く製造できるものである。な
お、溶接後の接点成形加工あるいは形状は必要に応じ適
宜行うものである。また、接点チップのボリュームに応
じ、随時任意の厚みが得られるものである。According to the method of manufacturing a small-sized electrical contact having the above-described structure, since the contact tip has a cubic shape or a spherical shape, the front surface and the back surface can be freely moved, and the base material can be easily conveyed and installed to a predetermined position, and the dimensional accuracy can be improved. Is excellent, and the contact surface or point is constant, the welding strength is stable, and there is little variation. Further, it is easy to automate, and the small electric contact having the minute contact portion can be efficiently manufactured. The contact forming process or shape after welding is appropriately performed as necessary. Further, an arbitrary thickness can be obtained at any time depending on the volume of the contact tip.

【０００６】[0006]

【実施例】以下に実施例、従来例について説明する。ま
ず、実施例として材質ＡｇＰｄ30％、球径 0.3mmの微小
球２を材質ばね用りん青銅、板厚 0.1mm、スリット巾0.
15mm、ブラシ巾 0.5mmのフープ状台材１の先端部に図１
に示す如く溶接した。その後図２に示す如く微小球２を
オーバル状に接点表面成形加工し微小接触部３を得た。
次いで図３に示す如くフープ状台材１から切断し、ブラ
シ接点４を得た。EXAMPLES Examples and conventional examples will be described below. First, as an example, a material of AgPd of 30% and a microsphere 2 having a sphere diameter of 0.3 mm is used as a material of phosphor bronze for spring, a plate thickness of 0.1 mm, and a slit width of 0.
Figure 1 on the tip of the hoop base material 1 with a width of 15 mm and a brush width of 0.5 mm.
Welded as shown in. Thereafter, as shown in FIG. 2, the contact surfaces of the microspheres 2 were formed into an oval shape to obtain the microcontact portions 3.
Then, as shown in FIG. 3, the hoop-shaped base material 1 was cut to obtain a brush contact 4.

【０００７】一方、従来例として実施例と同一材質、寸
法、形状のフープ状台材に図４に示す如くヘッダー加工
により材質ＡｇＰｄ30％、外径 0.3mm、高さ 0.2mmのオ
ーバル型接点５を作成しようと試みたが寸法が安定せ
ず、また溶接しようとしたが溶接時の発熱、位置づれ等
により困難であった。然して、従来例においては生産効
率悪く、満足のいくものではなかったのに対して、実施
例においては生産効率良く、溶接強度、寸法精度、外観
等も良好で満足のいくものであった。On the other hand, as a conventional example, as shown in FIG. 4, a hoop-shaped base material having the same material, size, and shape as the embodiment is processed by a header to form an oval type contact 5 of material AgPd 30%, outer diameter 0.3 mm, and height 0.2 mm. I tried to make it, but the dimensions were not stable, and I tried to weld it, but it was difficult due to heat generation during welding and misalignment. However, in the conventional example, the production efficiency was poor and not satisfactory, whereas in the example, the production efficiency was good and the welding strength, dimensional accuracy, appearance, etc. were satisfactory and satisfactory.

【０００８】[0008]

【発明の効果】以上の結果から明らかなように、本発明
の小型電気接点の製造方法によれば、立方体状あるいは
球状の接点チップに溶接を行うので、溶接強度が強く安
定した、また寸法精度、外観の良好な微小接触部を有し
た小型電気接点を効率よく作ることができる。As is clear from the above results, according to the method for manufacturing a small-sized electric contact of the present invention, since welding is performed on a cubic or spherical contact tip, the welding strength is strong and stable, and the dimensional accuracy is high. In addition, it is possible to efficiently make a small electric contact having a fine contact portion having a good appearance.

【図面の簡単な説明】[Brief description of drawings]

【図１】本発明の一実施例におけるフープ状台材の先端
部に微小球を溶接した状態を示す図。FIG. 1 is a diagram showing a state in which microspheres are welded to the tip end portion of a hoop-shaped base material according to an embodiment of the present invention.

【図２】図１の後に微小球をオーバル状に接点表面成形
加工をした図。FIG. 2 is a diagram of the contact surface molding processing of the microspheres into an oval shape after FIG.

【図３】図２の後にフープ状台材から切断したブラシ接
点を示す図。FIG. 3 is a view showing brush contacts cut from the hoop-shaped base material after FIG. 2;

【図４】従来用いられたヘッダー加工により得られた接
点を示す断面図。FIG. 4 is a cross-sectional view showing a contact obtained by conventional header processing.

【符号の説明】[Explanation of symbols]

１ フープ状台材 ２ 微小球 ３ 微小接触部 ４ ブラシ接点 1 Hoop-shaped base material 2 Micro sphere 3 Micro contact part 4 Brush contact

Claims (1)

【特許請求の範囲】[Claims] 【請求項１】 立方体状あるいは球状の接点チップにて
台材に溶接することを特徴とする小型電気接点の製造方
法。1. A method for manufacturing a small-sized electrical contact, which comprises welding a base material with a cubic or spherical contact tip.