Abstract: An operating switch panel, such as for an audio equipment tuner, utilizes a metal plate which is divided into a plurality of operating parts by simultaneous etching from both sides. Connecting parts remain between individual operating parts. Thin hinges are formed on the operating parts by etching from the back surface of the metal plate, dividing each operating part into two stationary and movable parts. The stationary parts are connected to each other through the connecting parts. Display parts in the form of recesses are formed on the surface of the metal plate respectively at each operating part. Projections are formed on the back surfaces of the movable parts for engaging associated switches. A number of operating parts can be arranged close to each other in a simplified and economical manufacturing process.

Abstract: Tuning apparatus including a scale provided with indicia corresponding to different broadcast frequencies to which the tuning apparatus is tunable and a pointer movable across the scale to indicate the particular broadcast frequency to which the tuning apparatus is tuned. The pointer is supported by a movable support which is guided by a guide shaft. A plurality of markers are slidably guided along at least one guide rail and are individually settable to desired locations adjacent the scale, thereby representing particular broadcast frequencies to which the tuning apparatus is tunable. A key removably mounted on the guide shaft is bi-directionally driven therealong by the movable support, the key being selectively operative to engage a desired one of the markers to move the engaged marker along the guide rail as the support is moved, whereby the marker is set to a desired position by reason of its engagement with the key.