Abstract: A liquid supplying device includes a liquid supplying flow path for supplying liquid from an upstream side toward a downstream side on which the liquid is consumed. A pump is driven for a pumping operation in accordance with displacement of a displacement member constituting a part of an inner wall of a pump chamber as a part of the liquid supplying flow path for changing the volume of the pump chamber. A detecting unit detects the remaining amount of the liquid of the liquid supplying source. The liquid supplying source is configured such that the volume of a liquid housing part as a closed space housing the liquid changes in accordance with the remaining amount of the liquid, and the detecting unit detects a liquid-end state in which the none of the liquid inside the liquid housing part remains based on the amount of displacement of the displacement member.

Abstract: A liquid supply device includes a liquid supply path for supplying liquid from an upstream side toward a downstream side where the liquid is consumed. A negative pressure chamber communicates with a decompression chamber through a communication hole and decompresses the decompression chamber. A communication hole valve body opens and closes the communication hole. A biasing member biases the valve body in a direction in which the valve body is always in a closed state. A flexible member forms a part of a wall surface of the negative pressure chamber and is displaced by a change in pressure within the negative pressure chamber. A communication hole valve body pressure member is displaced by the displacement of the flexible member to thereby press the valve body in a direction in which the valve body is in an open state against a biasing force of the biasing member.

Abstract: A liquid supplying device includes a liquid supplying flow path that supplies a liquid from an upstream side as a liquid supplying source side toward a downstream side on which the liquid is consumed, a pump that is driven for changing the volume of a pump chamber that is a part of the liquid supplying flow path, and a flow velocity reducing unit that reduces the flow velocity of the liquid passing through the liquid supplying flow path on the upstream side of the pump chamber by changing flow path resistance of the liquid supplying flow path in accordance with the speed of change of the volume of the pump chamber, in a case where the pump is driven for a suction operation that increases the volume of the pump chamber.

Abstract: A liquid supply device includes a liquid supply channel that supplies a liquid from an upstream side as a liquid supply source side to a downstream side, where the liquid is consumed, and a pump that pumps a part of the liquid supply channel as a pump chamber. A first one-way valve in the liquid supply channel on an upstream side from the pump chamber permits ink to flow from the upstream side to the downstream side. A second one-way valve on a downstream side from the pump chamber permits ink to flow from the upstream side toward the downstream side. A liquid pressure accumulation unit with a volume variable pressure accumulation chamber is disposed on a downstream side from the second one-way valve to form a part of the liquid supply channel and stores the liquid in a pressure-accumulated state within the pressure accumulation chamber.

Abstract: A liquid supply device includes a liquid supply channel that supplies a liquid from an upstream side as a liquid supply source side to a downstream side, on which the liquid is consumed, a first valve that is provided in the liquid supply channel to open and close the liquid supply channel, and a second valve that is provided on a downstream side from the first valve in the liquid supply channel to open and close the liquid supply channel. The first valve is closed when the second valve is open.

Abstract: Provided is a liquid supply apparatus including: a liquid supply path which supplies a liquid from an upstream side, which is a liquid supply source, to a downstream side in which the liquid is consumed; a defoaming chamber which is provided in the liquid supply path and defoams air bubbles included in the liquid; and a depressurization chamber which is provided at a position adjacent to the defoaming chamber with a partition wall interposed therebetween and is depressurized such that the pressure thereof becomes lower than the pressure of the defoaming chamber, wherein the partition wall allows permeation of gas by the depressurization of the depressurization chamber and restricts permeation of the liquid, wherein the partition wall has rigidity, and wherein the defoaming chamber is arranged in plurality and at least two of the defoaming chambers overlap with one depressurization chamber in an upper and lower direction.

Abstract: Provided is a liquid supply apparatus including a liquid supply path which supplies a liquid from an upstream side, which is a liquid supply source, to a downstream side in which the liquid is consumed; a defoaming chamber which is provided in the liquid supply path and defoams air bubbles included in the liquid; and a depressurization chamber which is provided at a position adjacent to the defoaming chamber with a partition wall interposed therebetween and is depressurized such that the pressure thereof becomes lower than the pressure of the defoaming chamber, wherein the partition wall allows permeation of gas by the depressurization of the depressurization chamber and restricts permeation of the liquid, and wherein an air bubble integrating portion which collects the air bubbles included in the liquid is provided in the defoaming chamber.

Abstract: Provided is a liquid supply apparatus including: a liquid supply path which supplies a liquid from an upstream side, which is a liquid supply source, to a downstream side in which the liquid is consumed; a defoaming chamber which is provided in the liquid supply path and defoams air bubbles included in the liquid; and a depressurization chamber which is provided at a position adjacent to the defoaming chamber with a partition interposed therebetween and is depressurized such that the pressure thereof becomes lower than the pressure of the defoaming chamber, wherein the partition allows permeation of gas by the depressurization of the depressurization chamber and restricts permeation of the liquid, and wherein the partition is configured by a partition wall having rigidity.

Abstract: A liquid ejecting apparatus for ejecting liquid from an ejection head, the liquid being supplied from a liquid supplying source, the liquid ejecting apparatus comprising: a carriage having the ejection head including: a liquid channel configured for flowing the liquid from the liquid supplying source to the ejection head; a gas trap chamber which is formed in the midstream of the liquid channel and expands the width of the liquid channel; and a gas recovery chamber which is adjacent to the gas trap chamber and having a gas permeable wall between the gas recovery chamber and the gas trap chamber; a carriage driver which drives the carriage; an attachment/detachment connection which is detachably connected to the gas recovery chamber; and a depressurization unit which decreases a pressure of the gas recovery chamber to a pressure lower than that of the gas trap chamber via the attachment/detachment connection.

Abstract: A chucking lever is configured so that it can move slightly only in the planar direction of the disk hub, without moving in the axial direction of a spindle that engages a central hole of the disk hub. Furthermore, the top surface of the chucking lever drive pin is configured to extend at an oblique angle relative to the planar surface of a hub platform of the disk chucking mechanism.

Abstract: A disk drive apparatus includes a spindle for engagement with a central hole of a disk hub of a magnetic disk, a rotary member fixed to the spindle, a chucking magnet provided on the rotary member for attracting the disk hub, and a chucking lever pivotally provided on the rotary member which comes at its one end into engagement with a drive hole formed in the disk hub to rotate the disk. When the chucking lever is not chucking the disk, the chucking lever is pivotal about its pivot support point within a given angle, but its movement in the axial direction of the spindle is prevented. The pivot support point section is provided with a disengagement preventive lever which acts in relation to the rotary member to prevent the chucking lever from disengaging from the rotary member.

Abstract: There are disclosed recording/reproducing devices for use with computers and particularly for recording or reproducing desired information on or from recording mediums like floppy disks, the devices being miniaturized and reduced in thickness for adapting themselves to the miniaturized computers of nowadays. The reduction in device thickness involves the use of a small-sized rare earth group magnet and neodymium ferrous boron which have good magnetic properties as rotor magnets of disk and carriage driving motors; or alternatively planar superpositions are avoided when placing the disk driving motor and the carriage or a carriage guide shaft and a circuit board. The thinned recording/reproducing devices contribute to diminishment of a space for accommodating the computer to meet a demand for miniaturization thereof. A plurality of miniaturized recording/reproducing devices of the invention can be set in the existing space for placement.

Abstract: A disk drive apparatus includes a spindle for engagement with a central hole of a disk hub of a magnetic disk, a rotary member fixed to the spindle, a chucking magnet provided on the rotary member for attracting the disk hub, and a chucking lever pivotally provided on the rotary member which comes at its one end into engagement with a drive hole formed in the disk hub to rotate the disk. When the chucking lever is not chucking the disk, the chucking lever is pivotal about its pivot support point within a given angle, but its movement in the axial direction of the spindle is prevented. The pivot support point section is provided with a disengagement preventive lever which acts in relation to the rotary member to prevent the chucking lever from disengaging from the rotary member.

Abstract: There are disclosed recording/reproducing devices for use with computers and particularly for recording or reproducing desired information on or from recording mediums like floppy disks, the devices being miniaturized and reduced in thickness for adapting themselves to the miniaturized computers of nowadays. The reduction in device thickness involves the use of a small-sized rare earth group magnet and neodymium ferrous boron which have good magnetic properties as rotor magnets of disk and carriage driving motors; or alternatively planar superpositions are avoided when placing the disk driving motor and the carriage or a carriage guide shaft and a circuit board. The thinned recording/reproducing devices contribute to diminishment of a space for accommodating the computer to meet a demand for miniaturization thereof. A plurality of miniaturized recording/reproducing devices of the invention can be set in the existing space for placement.

Abstract: A disk drive apparatus includes a spindle for engagement with a central hole of a disk hub of a magnetic disk, a rotary member fixed to the spindle, a chucking magnet provided on the rotary member for attracting the disk hub, and a chucking lever pivotally provided on the rotary member which comes at its one end into engagement with a drive hole formed in the disk hub to rotate the disk. When the chucking lever is not chucking the disk, the chucking lever is pivotal about its pivot support point within a given angle, but its movement in the axial direction of the spindle is prevented. The pivot support point section is provided with a disengagement preventive lever which acts in relation to the rotary member to prevent the chucking lever from disengaging from the rotary member.

Abstract: A disk drive apparatus for recording and reproducing signals movement-positions a head, mounted on a carriage, in a disk radial direction with the aid of a pinion provided on an output shaft of a step motor and a rack provided on the carriage The rack is attached to the carriage through parallel leaf springs, and press-engages with the pinion by providing a pre-load to the rack via an elastic restoring force caused by flexure of the parallel leaf springs.

Abstract: A disc drive for a disc including a disc rotating apparatus comprising a rotating shaft for being received within a first aperture of the disc. A spindle is affixed to the shaft. The spindle has a surface disposed in a plane perpendicular to the shaft, for supporting the disc. A disc driving means includes a position controlling member received in a second aperture of the disc, a rigid member for controlling the position of the position controlling member, and a biasing member for urging the rigid member in at least one direction so that the position controlling member engages the disc. A centering force to center the disc on the disc rotating apparatus is produced due to the action of the position controlling member on the disc. The biasing member may be configured so as to act upon the rigid member in an additional direction to produce an additional centering force component when the position controlling member engages the disc, thus urging sides of the first aperture of the disc against the rotating shaft.

Abstract: There are disclosed recording/reproducing devices for use with computers and particularly for recording or reproducing desired information on or from recording mediums like floppy disks, the devices being miniaturized and reduced in thickness for adapting themselves to the miniaturized computers of nowadays. The reduction in device thickness involves the use of a small-sized rare earth group magnet and neodymium ferrous boron which have good magnetic properties as rotor magnets of disk and carriage driving motors; or alternatively planar superpositions are avoided when placing the disk driving motor and the carriage or a carriage guide shaft and a circuit board. The thinned recording/reproducing devices contribute to diminishment of a space for accommodating the computer to meet a demand for miniaturization thereof. A plurality of miniaturized recording/reproducing devices of the invention can be set in the existing space for placement.

Abstract: There are disclosed recording/reproducing devices for use with computers and particularly for recording or reproducing desired information on or from recording mediums like floppy disks, the devices being miniaturized and reduced in thickness for adapting themselves to the miniaturized computers of nowadays. The reduction in device thickness involves the use of a small-sized rare earth group magnet and neodymium ferrous boron which have good magnetic properties as rotor magnets of disk and carriage driving motors; or alternatively planar superpositions are avoided when placing the disk driving motor and the carriage or a carriage guide shaft and a circuit board. The thinned recording/reproducing devices contribute to diminishment of a space for accommodating the computer to meet a demand for miniaturization thereof. A plurality of miniaturized recording/reproducing devices of the invention can be set in the existing space for placement.

Abstract: A disk drive apparatus includes a spindle for engagement with a central hole of a disk hub of a magnetic disk, a rotary member fixed to the spindle, a chucking magnet provided on the rotary member for attracting the disk hub, and a chucking lever pivotally provided on the rotary member which comes at its one end into engagement with a drive hole formed in the disk hub to rotate the disk. When the chucking lever is not chucking the disk, the chucking lever is pivotal about its pivot support point within a given angle, but its movement in the axial direction of the spindle is prevented. The pivot support point section is provided with a disengagement preventive lever which acts in relation to the rotary member to prevent the chucking lever from disengaging from the rotary member.