Abstract: One side of the operation panel for audio equipment is supported by a projected strip of the audio equipment body and the other side is held by an engagement claw. The engagement claw is pivotally supported on a holder with a spring installed therebetween. The holder in turn is pivotally supported by the end of a first arm whose base end is rotatably mounted on the audio equipment body. The holder is also pivotally connected to a second arm, which is rotatably mounted on the audio equipment body. When the operation panel is moved between the installed position and the pop-up position, a change in the angle between the holder and the engagement claw is kept small by the action of the second arm, so that the spring force acting on the engagement claw does not increase greatly, permitting easy removal or installation of the operation panel.

Abstract: An operating mechanism for a cassette deck, particularly, a double-type cassette deck, with the use of which the overall size of the deck is significantly reduced. A swingable cassette holder is arranged to open and close a cassette container section within the body of the deck. A lock mechanism is provided for locking the cassette holder in the closed state thereof with respect to the cassette container section. An operating button for controlling the locking and unlocking operations of the lock mechanism is provided within the cassette holder.