PUSH BUTTON SWITCH COVERING ASSEMBLY

摘要

THE PUSH BUTTON SWITCH COVERING ASSEMBLY OF THE INVENTION COMPRISES A PUSH BUTTON SWITCH COVERING MEMBER (1) MADE FROM A TRANSPARENT RUBBERY MATERIAL AND A CLICKING MEMBER (2) WITH A CLICKING DIAPHRAGM (7) BELOW THE COVERING MEMBER (1) WHICH IMPARTS THE OPERATOR''S FINGER TIP WITH A SHARP FEELING OF CLICKING WHEN THE KEY TOP (3) OF THE COVERING MEMBER (1) IS DEPRESSED. DIFFERENT FROM A CONVENTIONAL PUSH BUTTON SWITCH COVERING ASSEMBLY OF THIS TYPE, IN WHICH THE PUSHING LOAD ON THE KEY TOP (3) IS TRANSMITTED TO THE TOP OF THE CLICKING DIAPHRAGM (7) THROUGH A DOWNWARD PROTRUSION ON THE LOWER SURFACE OF THE KEY TOP (3), THEPUSHING LOAD ON THE KEY TOP (3) IN THIS INVENTION IS TRANSMITTED TO THE CLICKING DIAPHRAGM (7) BY MEANS OF AN UPWARDLY RAISED PART (8) FORMED ON THE TOP OF THE UPPER SURFACE OF THE UPWARDLY CONVEX CLICKING DIAPHRAGM (7) SO THAT THE FLAT LOWER SURFACE OF THE KEY TOP (3) IS FULLY AVAILABLE FOR FORMING A LAYER OF INDICIA (6) TOINDICATE THE PARTICULAR FUNCTION OF THE PUSH BUTTON SWITCH THROUGH THE TRANSPARENT KEY TOP (3) WITHOUT THE DISADVANTAGE OF WEARING OF THE INDICIA (6) AS IN THE CASE WHERE THE INDICIA LAYER (6) IS FORMED ON THE UPPER SURFACE OF THE KEY TOP (3). (FIGURE 1A & 1B)