Abstract: A disc loading device includes a first conveying unit to convey a disc and a second conveying unit to convey a cartridge containing the disc. When the disc is inserted or ejected, the disc is conveyed by the first conveying unit. When the cartridge is inserted or ejected, the cartridge is conveyed by the second conveying unit. When the cartridge is not detected by a cartridge detecting unit, a first conveying unit moving unit moves the first conveying unit to a first position and holds the first conveying unit in the first position, and when the cartridge is detected by the cartridge detecting unit, the first conveying unit moving unit moves the first conveying unit to a second position and holds the first conveying unit in the second position.

Abstract: In an attachment structure for attaching an attached-plate to a printed substrate which is installed in a mechanical chassis, the mechanical chassis includes a positioning pin for positioning the printed substrate; and the attached-plate includes a guide groove that engages with the positioning pin and is slidably guided in a predetermined path, a fixing portion to the printed substrate, and an engaging portion that engages with a side portion of the printed substrate. By causing the attached-plate to slide along a substrate side of the printed substrate with the guide groove being engaged with the positioning pin, the guide groove is guided by the positioning pin, whereby the engaging portion engages with the side portion of the printed substrate. In the engagement state, by fixing the fixing portion of the attached-plate to the printed substrate, the attached-plate is attached to the printed substrate.

Abstract: A thermal flow sensor can adjust the temperature of a heating element in a highly precise and reliable manner with the use of simple circuits, devices and process steps. The sensor includes an amplifier section (7) that amplifies a voltage across opposite ends of at least one of resistors (3, 4, 5) that constitute a bridge circuit, a current control section (9) that is controlled based on an output voltage of the amplifier section (7), and an output terminal (14) that is connected to one end of a heating element (1) that is controlled to be energized by the current control section (9). The amplifier section (7) includes an amplification factor control section for controlling an amplification factor by an electric signal from a computer, and uses an output voltage which has been amplified and impressed to an input voltage to an operational amplifier (8).

Abstract: A thermal flow rate sensor includes: a bridge circuit having a heat-generating resistor generating heat by receiving a supplied current, a heating element temperature detector having a resistance value varying in accordance with a temperature of the heat-generating resistor and a fluid temperature detector having a resistance value varying in accordance with a temperature of a fluid; a comparison portion supplying a digital output indicating a difference between voltages at intermediate points in the bridge circuit; a DA converter converting an output from the comparison portion to an analog signal and supplying the resultant signal to the heat-generating resistor as the current; and an output operation portion accumulating outputs from the comparison portion for a prescribed period to output a result of accumulation as a flow rate for the prescribed period, of the fluid which is an object of measurement.

Abstract: A thermal flow sensor can adjust the temperature of a heating element in a highly precise and reliable manner with the use of simple circuits, devices and process steps. The sensor includes an amplifier section (7) that amplifies a voltage across opposite ends of at least one of resistors (3, 4, 5) that constitute a bridge circuit, a current control section (9) that is controlled based on an output voltage of the amplifier section (7), and an output terminal (14) that is connected to one end of a heating element (1) that is controlled to be energized by the current control section (9). The amplifier section (7) includes an amplification factor control section for controlling an amplification factor by an electric signal from a computer, and uses an output voltage which has been amplified and impressed to an input voltage to an operational amplifier (8).

Abstract: A thermal flow sensor can adjust the temperature of a heating element in a highly precise and reliable manner with the use of simple circuits, devices and process steps. The sensor includes an amplifier section (7) that amplifies a voltage across opposite ends of at least one of resistors (3, 4, 5) that constitute a bridge circuit, a current control section (9) that is controlled based on an output voltage of the amplifier section (7), and an output terminal (14) that is connected to one end of a heating element (1) that is controlled to be energized by the current control section (9). The amplifier section (7) includes an amplification factor control section for controlling an amplification factor by an electric signal from a computer, and uses an output voltage which has been amplified and impressed to an input voltage to an operational amplifier (8).

Abstract: A thermal flow sensor can adjust the temperature of a heating element in a highly precise and reliable manner with the use of simple circuits, devices and process steps. The sensor includes an amplifier section (7) that amplifies a voltage across opposite ends of at least one of resistors (3, 4, 5) that constitute a bridge circuit, a current control section (9) that is controlled based on an output voltage of the amplifier section (7), and an output terminal (14) that is connected to one end of a heating element (1) that is controlled to be energized by the current control section (9). The amplifier section (7) includes an amplification factor control section for controlling an amplification factor by an electric signal from a computer, and uses an output voltage which has been amplified and impressed to an input voltage to an operational amplifier (8).

Abstract: A thermal flow sensor can adjust the temperature of a heating element in a highly precise and reliable manner with the use of simple circuits, devices and process steps. The sensor includes an amplifier section (7) that amplifies a voltage across opposite ends of at least one of resistors (3, 4, 5) that constitute a bridge circuit, a current control section (9) that is controlled based on an output voltage of the amplifier section (7), and an output terminal (14) that is connected to one end of a heating element (1) that is controlled to be energized by the current control section (9). The amplifier section (7) includes an amplification factor control section for controlling an amplification factor by an electric signal from a computer, and uses an output voltage which has been amplified and impressed to an input voltage to an operational amplifier (8).

Abstract: A thermal flow sensor can adjust the temperature of a heating element in a highly precise and reliable manner with the use of simple circuits, devices and process steps. The sensor includes an amplifier section (7) that amplifies a voltage across opposite ends of at least one of resistors (3, 4, 5) that constitute a bridge circuit, a current control section (9) that is controlled based on an output voltage of the amplifier section (7), and an output terminal (14) that is connected to one end of a heating element (1) that is controlled to be energized by the current control section (9). The amplifier section (7) includes an amplification factor control section for controlling an amplification factor by an electric signal from a computer, and uses an output voltage which has been amplified and impressed to an input voltage to an operational amplifier (8).

Abstract: A disk drive is provided for restraining deterioration of the verticality of the optical axis of an optical pickup in relation to the surface of the disk when the side of the disk to be scanned for the recording and/or reproducing action is alternated from one side to the other side, in recording and/or reproducing data signals on both sides of the disk. The disk drive (1) includes a turn table (11) on which a disk D is rotatably supported, a pickup (12) for recording and/or reproducing data signals on both sides of the disk D rotated by the turn table (11), and a disk tray (31) for transferring the disk D between a recording and reproducing position which confronts the turn table (11) and a loading and unloading position at the outside of the disk drive (1). A turning movement mechanism is provided for turning the turn table (11) and the pickup (12) at once from a first position which confronts the one side of the disk D to a second position which confronts the other side of the disk D or vice versa.

Abstract: A thermal flow sensor can adjust the temperature of a heating element in a highly precise and reliable manner with the use of simple circuits, devices and process steps. The sensor includes an amplifier section (7) that amplifies a voltage across opposite ends of at least one of resistors (3, 4, 5) that constitute a bridge circuit, a current control section (9) that is controlled based on an output voltage of the amplifier section (7), and an output terminal (14) that is connected to one end of a heating element (1) that is controlled to be energized by the current control section (9). The amplifier section (7) includes an amplification factor control section for controlling an amplification factor by an electric signal from a computer, and uses an output voltage which has been amplified and impressed to an input voltage to an operational amplifier (8).

Abstract: A disc device includes the following: a traverse base 5 that can be moved between a recording/reproducing position and a standby position, on which an optical pickup 2 and a turntable 1 are mounted; a front cover 3 including a disc carrying surface 3a and an aperture 3b; a clamp base 10 that can be moved between a first position that does not overlap the disc carrying surface 3a and a second position that overlaps the aperture 3b and includes a damper 11 for clamping the disc 4 to the turntable 1; and an open/close member 9 that is movably provided at the back of the front cover 3 and can cover/uncover the aperture 3b. When the disc 4 is clamped, the clamp base 10 is moved from a standby position to the position overlapping the aperture 3b, then the open/close member 9 is moved to open the aperture 3b, and subsequently the traverse base 5 is moved from the standby position to the recording/reproducing position, thereby clamping the disc 4 with the turntable 1 and the damper 11.

Abstract: A thermal flow sensor can adjust the temperature of a heating element in a highly precise and reliable manner with the use of simple circuits, devices and process steps. The sensor includes an amplifier section (7) that amplifies a voltage across opposite ends of at least one of resistors (3, 4, 5) that constitute a bridge circuit, a current control section (9) that is controlled based on an output voltage of the amplifier section (7), and an output terminal (14) that is connected to one end of a heating element (1) that is controlled to be energized by the current control section (9). The amplifier section (7) includes an amplification factor control section for controlling an amplification factor by an electric signal from a computer, and uses an output voltage which has been amplified and impressed to an input voltage to an operational amplifier (8).

Abstract: A disc device includes the following: a traverse base 5 that can be moved between a recording/reproducing position and a standby position, on which an optical pickup 2 and a turntable 1 are mounted; a front cover 3 including a disc carrying surface 3a that carries a disc 4 and an aperture 3b that is formed in the disc carrying surface 3a and allows the turntable 1 to pass through when the traverse base 5 is moved between the recording/reproducing position and the standby position; and centering members 8 for holding and shifting the disc 4 to a position where the center of the disc 4 is aligned with the center of the turntable 1. The loading of a disc can be performed in an easy and highly flexible manner.

Abstract: The disk transfer device according to the present invention includes a disk tray for holding the disk during the disk transfer action and a tray driving mechanism for driving the tray forward and backward between a first position which is the retracted location of the tray corresponding to a turn table in a disk drive and a second position which is the loading and unloading location of the disk outwardly of the disk drive, wherein the disk tray comprises a main tray for supporting one side of the disk and a sub tray provided separately of the main tray for holding the other side of the disk, the main tray and the sub tray are joined to each other to have a pocket for accommodating partially the disk.

Abstract: A thermal flow rate sensor includes: a bridge circuit having a heat-generating resistor generating heat by receiving a supplied current, a heating element temperature detector having a resistance value varying in accordance with a temperature of the heat-generating resistor and a fluid temperature detector having a resistance value varying in accordance with a temperature of a fluid; a comparison portion supplying a digital output indicating a difference between voltages at intermediate points in the bridge circuit; a DA converter converting an output from the comparison portion to an analog signal and supplying the resultant signal to the heat-generating resistor as the current; and an output operation portion accumulating outputs from the comparison portion for a prescribed period to output a result of accumulation as a flow rate for the prescribed period, of the fluid which is an object of measurement.

Abstract: A thermal flow sensor can adjust the temperature of a heating element in a highly precise and reliable manner with the use of simple circuits, devices and process steps. The sensor includes an amplifier section (7) that amplifies a voltage across opposite ends of at least one of resistors (3, 4, 5) that constitute a bridge circuit, a current control section (9) that is controlled based on an output voltage of the amplifier section (7), and an output terminal (14) that is connected to one end of a heating element (1) that is controlled to be energized by the current control section (9). The amplifier section (7) includes an amplification factor control section for controlling an amplification factor by an electric signal from a computer, and uses an output voltage which has been amplified and impressed to an input voltage to an operational amplifier (8).

Abstract: A disk transfer device including a disk tray for holding a disk during the disk transfer action and a tray driving mechanism for driving the tray forward and backward between a first position which is the retracted location of the tray corresponding to a turntable in a disk drive and a second position which is the loading and unloading location of the disk outwardly of the disk drive. The disk tray is provided with a large diameter support region and a small diameter support region which is stepped down by a predetermined distance from the large diameter support region. A plurality of claws capable of engaging with the peripheral edge of the lower side of a small size disk are provided on the outer periphery of the small diameter support region.

Abstract: A rotation state detecting device capable of detecting the direction of rotation of a rotating body includes first and second bridge circuits made up of magneto-resistance effect elements, a first comparator for detecting the increasing/decreasing direction of the center point voltage of the first bridge circuit, a second comparator for detecting the increasing/decreasing direction of the center point voltage of the second bridge circuit, a third comparator for detecting the difference between the center point voltage of the first bridge circuit and the center point voltage of the second bridge circuit, and logic value information deriving means for outputting “1” when the logic values of the outputs of the first comparator and the second comparator are both “1”, outputting “0” when they are both “0”, and continuing to output the previous value at other times, the direction of rotation of the rotating body being determined on the basis of a combination of the outputs of the first, second and third comparators

Abstract: A rotation state detecting device capable of detecting the direction of rotation of a rotating body includes first and second bridge circuits made up of magneto-resistance effect elements, a first comparator for detecting the increasing/decreasing direction of the center point voltage of the first bridge circuit, a second comparator for detecting the increasing/decreasing direction of the center point voltage of the second bridge circuit, a third comparator for detecting the difference between the center point voltage of the first bridge circuit and the center point voltage of the second bridge circuit, and logic value information deriving means for outputting “1” when the logic values of the outputs of the first comparator and the second comparator are both “1”, outputting “0” when they are both “0”, and continuing to output the previous value at other times, the direction of rotation of the rotating body being determined on the basis of a combination of the outputs of the first, second and third comparators