An arm (5) is provided with protrusions (56a, 56b) disposed between a spring (7) and the arm (5) and biasing the spring (7) away from a shutter (2) when the shutter (2) is disposed at either one of two positions, a closed position and an open position. This prevents natural vibration of the spring (7) due to extension of the spring (7), thereby preventing noise.

A cam projection sliding in a cam slot of an arm causes the arm to proceed to an arm when a shutter is in the closed position or the open position and to recede from the arm when the shutter is sliding between the open position and the closed position. A spring is thereby considerably displaced, providing a satisfactory operation of the shutter.

A cam projection sliding in a cam slot of an arm causes the arm to proceed to an arm when a shutter is in the closed position or the open position and to recede from the arm when the shutter is sliding between the open position and the closed position. A spring is thereby considerably displaced, providing a satisfactory operation of the shutter.

A disc drive includes: a disc driver that plays a safely seated optical disc; and a disc mover that moves the disc driver. The disc driver and the disc mover are configured to share information of their respective states with each other.

An arm (5) is provided with protrusions (56a, 56b) disposed between a spring (7) and the arm (5) and biasing the spring (7) away from a shutter (2) when the shutter (2) is disposed at either one of two positions, a closed position and an open position. This prevents natural vibration of the spring (7) due to extension of the spring (7), thereby preventing noise.

An arm (5) is provided with protrusions (56a, 56b) disposed between a spring (7) and the arm (5) and biasing the spring (7) away from a shutter (2) when the shutter (2) is disposed at either one of two positions, a closed position and an open position. This prevents natural vibration of the spring (7) due to extension of the spring (7), thereby preventing noise.

A disc transfer device according to the present disclosure is a disc transfer device that transfers a disc in a first direction from a first position toward a third position via a second position, and includes a roller, a roller support mechanism, a first retaining member, a second retaining member, and a retaining member support mechanism. The roller rotates in a state of contact with a disc end face on one side in a second direction being orthogonal to the first direction, until the disc reaches the third position from the first position. The roller support mechanism supports the roller such that the roller is in contact with the transferred disc and is moveable in the first direction and the second direction. The first retaining member extends in the first direction, and is brought into contact with the disc end face on the other side in the second direction until the disc reaches at least the second position from the first position. The second retaining member is brought into contact with the disc end face on the other side in the second direction until the disc reaches the third position from the second position. The retaining member support mechanism supports the second retaining member such that the second retaining member is in contact with the transferred disc and is moveable in the first direction and the second direction.

A disc transfer device according to the present disclosure is a disc transfer device that transfers a disc in a first direction from a first position toward a third position via a second position, and includes a roller, a roller support mechanism, a first retaining member, a second retaining member, and a retaining member support mechanism. The roller rotates in a state of contact with a disc end face on one side in a second direction being orthogonal to the first direction, until the disc reaches the third position from the first position. The roller support mechanism supports the roller such that the roller is in contact with the transferred disc and is moveable in the first direction and the second direction. The first retaining member extends in the first direction, and is brought into contact with the disc end face on the other side in the second direction until the disc reaches at least the second position from the first position. The second retaining member is brought into contact with the disc end face on the other side in the second direction until the disc reaches the third position from the second position. The retaining member support mechanism supports the second retaining member such that the second retaining member is in contact with the transferred disc and is moveable in the first direction and the second direction.

A disc drive (digital book data playback apparatus) includes a cabinet, a disc insertion part through which a digital book data disc is inserted into the cabinet, the disc insertion part being provided in a surface of the cabinet, and a guide groove formed in a surface of the cabinet, the guide groove having a starting end portion formed at an opening end and a terminating end portion continued to the disc insertion part, the guide groove being capable of receiving an outer peripheral edge of the digital book data disc to be inserted into the disc insertion part until the outer peripheral edge reaches a necessary depth.

A disc drive (digital book data playback apparatus) includes a cabinet, a disc insertion part through which a digital book data disc is inserted into the cabinet, the disc insertion part being provided in a surface of the cabinet, and a guide groove formed in a surface of the cabinet, the guide groove having a starting end portion formed at an opening end and a terminating end portion continued to the disc insertion part, the guide groove being capable of receiving an outer peripheral edge of the digital book data disc to be inserted into the disc insertion part until the outer peripheral edge reaches a necessary depth.