ELECTRIC COMPONENT

To provide an electric component which restrains accumulation of dust on an operator and enables a rotational operation to be easily performed.SOLUTION: A push button switch 10 has a button 14 for performing a rotating operation and a pull-out operation on a main body portion 12. The button 14 has a circular profile when viewed in the direction of an axis J, and includes a circular portion 22 forming the circular profile in front, a square cross-sectional portion 24 which forms a regular decagon on a plane perpendicular to the axis J behind the circular portion 22, and a columnar portion 26 which connects the circular portion 22 and the square cross-sectional portion 24. The peripheral surface of the columnar portion 26 has a shape that uniformly changes from a circular shape to a regular decagonal shape from a portion connecting with the circular portion 22 in the front to a portion connecting with the square cross-sectional portion 24 in the rear. The peripheral surface of the columnar portion 26 uniformly changes so that an arc extending in the circumferential direction in the front becomes a straight line corresponding to one side of the regular decagonal shape toward the rear. The circumscribed circle of the square cross-sectional portion 24 has a smaller diameter than that of the circle of the circular portion 22.SELECTED DRAWING: Figure 1 【課題】操作子にゴミが溜まりにくく、しかも回転操作を容易に行うことのできる電気部品を提供する。【解決手段】押ボタンスイッチ１０は、本体部１２に対して回転操作および引出操作を行うボタン１４を備える。ボタン１４は軸Ｊ上から見て輪郭が円形であり、前方で円形の輪郭を形成する円状部２２と、円状部２２よりも後方で軸線Ｊに直交する面で正１０角形を形成する角形断面部２４と、円状部２２と角形断面部２４とをつなぐ柱状部２６とを有する。柱状部２６の周面は、前方で円状部２２とつながる部分から後方で角形断面部２４とつながる部分まで、円形から正１０角形まで一様の態様で変化する形状である。柱状部２６の周面は、前方で周方向に沿う円弧が、後方に向かって正１０角形の一辺に相当する直線となるように一様に変化する。角形断面部２４の外接円は円状部２２の円形よりも小径である。【選択図】図１