Abstract: A recording and reproduction apparatus has a medium door which is disposed on the front of a medium insertion slot and opens or closes the medium insertion slot. An opening and closing mechanism allows the medium door to enter the medium insertion slot in response to an operation of trying to insert a predetermined medium into the medium insertion slot thereby to open the medium insertion slot.

Abstract: A cassette deck that can use either a large cassette or a small cassette and can move the small cassette with certainty to a position at which the small cassette can be taken out manually. The cassette deck includes a housing, and a mounting and discharging mechanism capable of mounting and discharging any of a small cassette and a large cassette. The mounting and discharging mechanism includes a moving mechanism for pushing at a rear face of the small cassette to move the small cassette to a position at which the small cassette can be manually taken out. The moving mechanism provided on a lid member includes a pivotal arm mounted for pivotal back and forth movement over approximately 180 degrees on the inner side of the housing.

Abstract: A control system includes a first device having an infrared ray signal receiving portion and an infrared ray signal transmission portion, and is capable of performing a predetermined operation in accordance with an infrared ray signal received by the infrared ray signal receiving portion and outputting a predetermined infrared ray signal from the infrared ray signal transmission portion, and a second device having an infrared ray signal receiving portion to which the infrared ray signal outputted from the infrared ray signal transmission portion of the first device is applied through an optical cable, and for performing a predetermined operation in accordance with the infrared ray signal received by the infrared ray signal receiving portion thereof.