Abstract: It is an object of the present invention to provide a push button switch in which is achieved a light blocking structure that is efficient and permits the button to be pushed in, disposed adjacent to other push button switches on the same substrate in a direction perpendicular to the direction in which the button is pushed in, so that the light from light sources assigned different functions will not interfere one with the other. The push button switch of the present invention comprises LEDs disposed adjacent to each other on the same substrate, two light barriers erected apart from each other and in between the LEDs, and one light barrier provided on the back side of a control knob, wherein the distal end of the one light barrier is in a positional relationship of fitting into the gap between the two light barriers, and the two light barriers are tall enough to permit the displacement of the one light barrier when the control knob is pushed in.

Abstract: It is an object of the present invention to provide a push button switch in which is achieved a light blocking structure that is efficient and permits the button to be pushed in, disposed adjacent to other push button switches on the same substrate in a direction perpendicular to the direction in which the button is pushed in, so that the light from light sources assigned different functions will not interfere one with the other. The push button switch of the present invention comprises LEDs disposed adjacent to each other on the same substrate, two light barriers erected apart from each other and in between the LEDs, and one light barrier provided on the back side of a control knob, wherein the distal end of the one light barrier is in a positional relationship of fitting into the gap between the two light barriers, and the two light barriers are tall enough to permit the displacement of the one light barrier when the control knob is pushed in.