Abstract: A printed circuit board (PCB) edge connection structure formed by a first PCB having one or more electronic components and printed circuitry provided thereon and a second PCB, having one or more edge contact pads provided thereon, attached to the first PCB and covering an area on the first PCB into which a portion of the printed circuitry extends. The resulting structure maximizes the utilization of the surface area on the first PCB for printed circuitry, thus, reducing the overall size of the end product.

Abstract: A device for displaying the rotating condition of a tape or disk in audio or video systems is disclosed. The display device has a rotary means, which is installed inside a housing of an audio or video system and is rotated synchronously with a tape feeding or disk rotating motion of the system. A transparent window is set on the housing at a position suitable for observing the rotary means from outside the housing. A guide tube extends from the window toward the rotary means and allows a user to observe a rotating motion of the rotary means through the transparent window and thereby to check the tape feeding or disk rotating motion of the system. The rotary means may be one of the rotating members of a power transmission mechanism of the system. Alternatively, the rotary means may be a rotating wheel operating in conjunction with the rotating members of a power transmission mechanism of the system.