Abstract: In a disc changer provided with a driving force transmission mechanism using a crank arm, the size of the crank arm is reduced as much as possible and the smooth movement of the tray is realized. The crank arm (7) is rotated by a driving force of a drive motor (5). The crank arm (7) has a distal end (71a) connected to a guide groove (100) formed at the tray (1). When the crank arm (7) rotates, the distal end (71a) moves along the guide groove (100). When the distal end moves through a left end curve (120) or a right end curve (130) at opposite ends of the guide groove (100), the rotational force of the crank arm (7) is transmitted to the tray (1), whereby the tray (1) performs open/close movement. The guide groove (100) has a bow shape made up of an arcuate intermediate curve (110), and the left end curve (120) and the right end curve (130) which are curved opposite to the intermediate curve (110), so that the force to be transmitted to the tray (1) changes continuously.

Abstract: In a disc changer provided with a driving force transmission mechanism using a crank arm, the size of the crank arm is reduced as much as possible and the smooth movement of the tray is realized. The crank arm (7) is rotated by a driving force of a drive motor (5). The crank arm (7) has a distal end (71a) connected to a guide groove (100) formed at the tray (1). When the crank arm (7) rotates, the distal end (71a) moves along the guide groove (100). When the distal end moves through a left end curve (120) or a right end curve (130) at opposite ends of the guide groove (100), the rotational force of the crank arm (7) is transmitted to the tray (1), whereby the tray (1) performs open/close movement. The guide groove (100) has a bow shape made up of an arcuate intermediate curve (110), and the left end curve (120) and the right end curve (130) which are curved opposite to the intermediate curve (110), so that the force to be transmitted to the tray (1) changes continuously.

Abstract: A reproduction system includes speaker array composed of plural speakers having a diaphragm for reproducing an audio signal and reflection unit disposed in a chamber for reflecting a radiated sound from the speaker array. The plural speakers of the speaker array are positioned so that the vibration direction of each diaphragm may be directed towards the reflection unit, and the reflection path distance from each diaphragm to a listening point, which defines a position of the viewer/listener, via the reflection surface of the reflection unit may be equal.