電気接点ばね用材料としての銅めっき炭素鋼板の各種特性

摘要

The electrical contact springs are used in the electric equipments for connecting and conducting. Many of them are currently made of copper alloy such as phosphor bronze. It seems to be able to apply a carbon steel sheet which is improved electrical conductivity, then properties of the copper electroplated carbon steel sheet was investigated as a material for the electrical contact springs.rnThe main results obtained are as follows;rn(1) The copper electroplated carbon steel sheet has excellent electrical conductivity and spring bending elastic limit, which are equivalent to or superior to those of phosphor bronze. It is possible to control the properties widely by adjusting both the spring bending elastic limit of the carbon steel sheet and the thickness of the copper plating.rn(2) Bendability of the copper electroplated carbon steel sheet is the same as that of phosphor bronze.rn(3) Stress relaxation ratio of the copper electroplated carbon steel sheet is about 8% at 2001, thermal stress relaxation behavior is superior to that of phosphor bronze.rn(4) Contact pressure of the copper electroplated carbon steel sheet can be higher than that of phosphor bronze.%日常の生活用品，娯楽用品から産業用機器に至る電気rn電子機器類には，コネクターや電池ホルダーばねなどのrn電気接点ばねが組込まれている。一般的に電気接点ばねrnは，効率よく通電する機能ならびに相手部材がずれたり，rn外れたりしないように保持する機能を必要とするため，rnその材料には良好な導電性とばね性（具体的には導電率，rnばね限界値が高いこと）が求められる。