Abstract: A power supply protection circuit is a circuit that controls a protection switch provided on a power supply line connecting a direct current power supply and a load circuit. The power supply protection circuit includes: circuitry connected to the protection switch; and a controller that switches an operation state of the circuitry between a first state and a second state. The first state is an operation state in which driving of the protection switch is enabled when the protection switch is a first semiconductor switch having a control terminal connected to a semiconductor layer of a first conductivity type. The second state is an operation state in which driving of the protection switch is enabled when the protection switch is a second semiconductor switch having a control terminal connected to a semiconductor layer of a second conductivity type that is different from the semiconductor layer of a first conductivity type.

Abstract: An automatic CD processing facility includes a mechanical gripper used for clamping a CD, storage cabinets located on side faces of the mechanical gripper and used for storing CDs, and a CD driver array cabinet located in front of or/and behind the mechanical gripper and used for processing the CDs. the CDs are placed in the storage cabinets and then are transferred by the mechanical gripper into the CD driver array cabinet to be processed, and after being processed, the CDs are taken out of the CD driver array cabinet to be placed back into the storage cabinets by the mechanical gripper. The automatic CD processing facility is high in automation degree, replaces traditional manual operation to take and place CDs, and improves processing efficiency.

Abstract: Connector receptacles having protective doors. A protective door can block a card, module, or connector insert from being inserted at an oblique angle to protect contacts in a connector receptacle from damage due to an improper insertion. The protective door can normally be closed in the absence of a card inserted in the connector receptacle. The door can be a front of a cam. A spring or magnet can bias the door in the closed position when no card is inserted. The door can be arranged to stay closed when a card is inserted at an oblique angle. When the card is inserted properly, the cam can rotate about an axis and the door can open allowing the card to access to the contacts of the connector receptacle. A second door in front of the protective door can be included to provide enhanced functionality and to provide a more uniform appearance.

Abstract: An electronic device is provided which may include a tray, an exterior cover, and/or a first hooking structure. The tray may be inserted or drawn to or from an inside via an opening of a housing of the electronic device, and may include a space for receiving a card. The exterior cover may be movably coupled to the tray. The first hooking structure may be disposed inside the electronic device, and may maintain a closed state of the exterior cover, and may release the closed state of the exterior cover in response to pressing of the exterior cover.

Abstract: A disc device includes a plurality of magazines, each having a tray that stores a plurality of discs, a plurality of disc drives that performs recording or reproducing of information on or from the plurality of discs, a picker that draws out the tray from one of the plurality of magazines and that conveys the tray to a position near the plurality of disc drives, and a disc separating and supplying device that, at the position near the plurality of disc drives, holds the plurality of discs stored in the tray, separates at least one of the plurality of discs stored in the tray from a remainder of the plurality of the discs stored in the tray, and supplies the at least one of the plurality of discs stored in the tray to at least one of the plurality of disc drives.

Abstract: An electronic enclosure includes a first electronic module, a second electronic module, a third electronic module and a handle. The first electronic module is physically connected to the second electronic module and the third electronic module is physically connected to the second electronic module. The second electronic module vertically disengages from the first electronic module and the third electronic module horizontally disengages from the second electronic module. The handle forces sequenced orthogonal disconnection of the electronic modules such that the third electronic module horizontally disengages from the second electronic module prior to the second electronic module vertically disengages from the first electronic module.

Abstract: Systems and methods are described for media drive operational data retrieval in a storage library in a manner that is asynchronous with respect to other drive-related communications. Embodiments operate in context of a data storage library having a robotic assembly that ferries media cartridges between media slots and media drives to fulfill requests by host systems. The media drives can communicate with a drive controller over a control path and with host systems over a data path. The drive controller can retrieve operational data from the media drive while the drive is effectively idle, and can communicate the retrieved operational data over the control path to the library. Accordingly, retrieval and communication of the drive operational data can be performed via the control path in a manner that is asynchronous with respect to data path and/or other drive-related communications.

Abstract: A rotating device includes a retained assembly including a spherical retained member with a spherical encircled face, and an encircling member that includes an annular end face which encircles the spherical retained member and which extends outwardly in a radial direction, a retainer assembly including a retainer member which includes an encircling face encircling the encircled face and which retains thereinside a part of the spherical retained member, and a facing member that faces the encircling member in an axial direction, the retainer assembly supporting the retained assembly in a freely and relatively rotatable manner, and forming a fluid dynamic bearing mechanism, and a thrust dynamic pressure generating groove formed in at least either one of a surface of the encircling member and a surface of the facing member, which surfaces face with each other in the axial direction.

Abstract: Disclosed is a locking mechanism which can perform the reduction of non-actual working hours of the library apparatus. The locking mechanism includes a first locking unit which fits with a cutout provided on a side surface of an object to be locked, the object being formed with a plurality of surfaces and the side surface being one of the surfaces in a insertion/extraction direction of the object; and a second locking unit, provided on an opposite side of the first locking unit in a manner sandwiching the object, which includes a contact member which is in contact with a back surface of the object, the back surface being one of the surfaces and far from a slot to/from which the object is inserted/extracted, wherein at least a part of the contact member is located in a path of the object.

Abstract: In a unit holding mechanism, a first slide lever 31 and a second slide lever 32 are slidable in directions different from those of a third slide lever 41. Thus, it is possible to prevent an erroneous removal of battery units 21 and 22 and an HDD unit 23. More specifically, since the sliding directions of the slide switches vary with the type of unit to be loaded/unloaded, a user can identify the unit to be loaded/unloaded by examining only the sliding directions of the slide switches by the touch. Thus, even if the user attempts to remove the unit without viewing a bottom surface 1b of a first housing 1, it is possible to reduce the possibility of a misoperation in which a unit other than the intended unit is removed erroneously.

Abstract: A disk apparatus includes a chassis, a disk tray and a tray panel unit. The tray panel unit includes a panel main body and a spring body. The spring body has a coil part, a pair of end attachment parts and a middle attachment part. An axial direction of the coil part is aligned with a width direction of the tray panel unit. The pair of end attachment parts extends from both axial ends of the coil part, respectively. The end attachment parts are fixedly coupled to one of the panel main body and a front end part of the disk tray. The middle attachment part is provided to an axial middle portion of the coil part. The middle attachment part is fixedly coupled to the other of the panel main body and the front end part of the disk tray.

Abstract: According to one embodiment, a disc drive apparatus includes a main frame having sidewalls and first and second guides disposed on the sidewalls and opposed to each other, a recording medium holder configured to hold a disc recording medium, a medium drive section, and an ascent/descent retaining member which supports the medium drive section and is attached to the main frame for ascent and descent. The retaining member includes a pair of arm portions, a connecting portion which connects respective one-end portions of the arm portions, pivotal portions arranged on the respective other end portions of the arm portions and supported on the sidewalls, and first and second engaging portions disposed on the respective one-end portions of the arm portions for engagement with the first and second guides, respectively. The first guide is formed of a leaf spring and configured to urge the retaining member toward the second guide.

Abstract: A disk drive including a tray and an opener. The tray includes a disk cartridge mounted thereon and is loaded into and unloaded from a main body. The opener is installed in the main body and elastically contacts a guide formed on the tray. The opener includes a second gear and a first protrusion. The second gear rotates a rotating wheel when in contact with a first gear. The first protrusion formed on a first end of the second gear temporarily rotates the rotating wheel so that the first and second gears can mesh. The guide has a first cam that moves the opener such that the first protrusion does not interfere with the latch when the tray is loaded/unloaded.

Abstract: An optical disk device of the present invention has a main PC board carrying a semiconductor element and attached at the rear of a drawer to efficiently dissipate a heat generated from the semiconductor element. The drawer is formed of a material having good thermal conductivity. A thermal conductive member having good thermal conductivity is interposed between the IC desired to be dissipate heat and the drawer.

Abstract: An optical disk device of the present invention has a main PC board carrying a semiconductor element and attached at the rear of a drawer to efficiently dissipate a heat generated from the semiconductor element. The drawer is formed of a material having good thermal conductivity. A thermal conductive member having good thermal conductivity is interposed between the IC desired to be dissipate heat and the drawer.

Abstract: A storage medium load and unload apparatus for diverting a storage medium insertion impact force is provided. The load and unload apparatus comprises a shuttle having a first pin with a first radius extending from a side surface of the shuttle and a protrusion having a posterior edge extending from the side surface. The protrusion posterior edge is displaced a first distance from a center of the pin. A fixed side plate has a flange with a vertical edge, and a first slot with an anterior edge and a curved posterior edge. A first width is provided between the anterior edge and the curved posterior edge of the first slot. The vertical edge of the flange is displaced a second distance from the anterior edge of the first slot. The first pin is engaged with the first slot. A sum of the first width and the second distance is greater than the sum of the first distance and the first radius.

Abstract: A floppy disk drive includes a frame having a bottom portion and left and right walls and a casing for covering the frame. The casing includes an upper cover for covering an upper side of the frame and a lower cover for covering a lower side of the frame, in which the upper cover has a top plate and left and right side plates, and the lower cover has a bottom plate and left and right plates. Each of the side walls of the frame is designed so as to have size and height that are partially overlapped with the side plate of the upper cover and the side plate of the lower cover, respectively, at each side of the casing, thereby providing a triplex structure for reinforcing each side of the casing.

Abstract: In a flexible disk drive for a flexible disk, a main frame defines a receiving portion for receiving the flexible disk. The main frame has a principal surface which faces the receiving portion and extends in a first direction and a second direction perpendicular to the first direction. A carriage assembly is mounted on the main frame and has a magnetic head for accessing the flexible disk. The carriage assembly is movable to carry the magnetic head along the principal surface. An eject base is coupled to the main frame and has a main portion facing the principal surface and side plates opposite to each other in the first direction. Between the main frame and the eject base, an eject plate is placed movable in the second direction for ejecting the flexible disk from the receiving portion. The eject plate has side plates facing the side plates of the eject base in the first direction, respectively.

Abstract: A front shutter (13?) comprises arm portions (132, 133) formed at both ends of an upper side of a door member (131). While one shaft portion (136) is formed on one of the arm portions (132) through a positioning portion (134), the other shaft portion (137) is formed on the other of the arm portions (133). The shaft portions (136, 137?) are inserted into holes formed on a cut and raised piece (111) and a side wall (112) respectively. The cut and raised piece (111) and the side wall (112) rotatably supports the shaft portions (136, 137?). A gap between the arm portion (133) and the side wall (112) is wider because of no positioning portion between the arm portion (133) and the side wall (112). The shutter spring (14?) not only gives force to the front shutter (13?) in a closing direction but also presses the front shutter toward the cut and raised piece (111) to prevent the shutter from moving along a pivot defined by the shaft portions (136, 137?).

Abstract: A flexible disk drive includes a case and a disk holder provided in the case. A flexible disk is mounted on the disk holder. A part of the disk holder abuts against an inner face of the case. Preferably, the part of the disk holder is a tip end portion of the disk holder. The tip end portion of the disk holder is bent in a slanted direction so as to enlarge an inlet of the disk holder for the flexible disk to be inserted.

Abstract: In order to provide a positioning mechanism that can be processed easily and accurately by press forming and a frame structure having the same, especially a main frame and a method of manufacturing the same, the invention provides a frame structure of the flexible disk drive including a pair of projections fitted into a pair of corresponding positioning holes on the inserted flexible disk. The pair of projections is formed by cutting and raising.

Abstract: A CD drive includes an upper cover, a disk tray, a clamp, a push piece, and a guiding rod. The upper cover includes a guiding track and the disk tray is installed below the upper cover in a slidable manner. Additionally, the clamp is installed on the upper cover in a moveable manner, while the push piece is installed on the disk tray. The guiding rod has a first end fixed on the push piece, and a second end slidably installed in the guiding track. When the disk tray slides in or slides out of the upper cover, the guiding rod will slide along the guiding track and move the push piece to push the clamp upward so as to prevent the clamp from scraping an optical disk.

Abstract: A system for exchanging digital data among a plurality of hand-held computer devices. Digital signals are written by a first hand-held device to a mini-cartridge that mini-cartridge is inter-operable among a class of hand-held devices, each of which is equipped with a mini-disk drive. A common digital data format is employed to further facilitate exchange of data between devices.

Abstract: There is provided an optical recording media cartridge, which is provided with a case that accommodates the optical recording media and that has an opening, and a shutter that is attached to the case and that is movable between a first position at which the shutter covers the opening and a second position. The optical recording media cartridge is further provided with a shutter lock mechanism that locks the shutter while the shutter is positioned at the first position, and a shutter release mechanism that releases the shutter locked by the shutter lock mechanism by utilizing a magnetic force exerted thereon.

Abstract: A main frame has a size where only high precision parts are mounted thereon and has structure where a front portion of a frame is deleted. A lower cover, which covers a lower surface of the main frame, has a function as a sub-frame mounting low precision parts corresponding to the front portion of the deleted frame, thereby playing a role as one frame by a combination of the main frame and the sub-frame of the lower cover.

Abstract: A relative adjustment between an optical disc rotating mechanism and an optical pickup is adjusted by rotating a rotary member against a biasing force of an engaging projection. As the rotary member is rotated, the projection is slid for movement on an inclined surface, changing a relative position between the rotary member and a bottom wall of a subsidiary chassis, causing the subsidiary chassis to have a varied inclination relative to a main chassis. An adjusted condition is maintained by an engaging force between an engaging groove and the engaging projection biased toward the rotary member.

Abstract: In a disk drive for using a disk cartridge including a magnetic disk, a reinforcing arrangement is coupled to a main frame, a main board fixed to the main frame, and a head assembly which is movable in a radial direction of the magnetic disk. The reinforcing arrangement inhibits internal collision in the head assembly even when the disk drive is subjected to a mechanical shock. The main board and the head assembly are placed between the main frame and a cover which is opposite to the main frame.

Abstract: In a disk drive for using a disk cartridge including a magnetic disk, a reinforcing arrangement is coupled to a main frame, a main board, and a disk receiving/ejecting mechanism which is for receiving and ejecting the disk cartridge. The reinforcing arrangement resists an external stress applied between the main frame and a cover opposite to the main frame to protect a head assembly which is movable between the main frame and the cover in a radial direction of the magnetic disk. The main board and the disk receiving/ejecting mechanism are placed between the main frame and the cover and are coupled to the main frame.

Abstract: A method and system for accessing media objects in an automated storage library using a robotic mechanism included mounting the robotic mechanism to a horizontally arranged track arranged in the same plane as first and second horizontal rows of media object storage cells. Each of the media object storage cells houses a media object. The horizontally arranged track is disposed adjacent to the first row of media object storage cells. The robotic mechanism is mounted to the track for moving horizontally along the track. A media object manipulation mechanism such as a gripper mechanism is coupled to the robotic mechanism. The media object manipulation mechanism is vertically movable for moving between the first and second rows of media object storage cells when the robotic mechanism is coupled to the track to manipulate the media objects housed within the first and second rows of media object storage cells.

Abstract: A computing system is adapted for use with an optical disk drive, and includes a motherboard and a control key. The motherboard is adapted to be coupled electrically to the optical disk drive. The control key is coupled electrically to the motherboard, and is operable so as to provide a control signal to the motherboard. The motherboard is adapted to control disk loading and disk unloading operations of the optical disk drive in accordance with the control signal provided by the control key.

Abstract: A projecting portion is formed on an edge, which provides a notch for an eject button, of a front shutter of an FDD. The projecting portion projects toward the eject button. The eject button provides a cavity for canceling interference between the projecting portion and the eject button in a state without external force. Upon receiving external force, the eject button is pressed to the projecting portion. In this state, the front shutter is forced to rotate in a closing direction thereof. Because the front shutter keeps a closed state, the force given to the projecting portion has a direction parallel to a main surface of a door member of the front shutter. Therefore, the door member is not bent by the external force and the front shutter does not come off from a main frame of the FDD.

Abstract: A front shutter attaching structure comprises flanges formed on peripheral surfaces of coaxial pivots of a front shutter and hooks formed at a cover for covering an upper side of a main frame. The front shutter is attached to the main frame by inserting of the pivots into holes formed in side plates of the main frame. Because the flanges are impossible to be inserted into the holes of the main frame, they restrict movement of the front shutter in a direction along the pivots against the main frame. Each of the hooks is located between a door member of the front shutter and each of the flanges when the cover is fixed to the main frame. The hooks restrict movement of the flanges in the direction along the pivots at the base side of the pivots.

Abstract: A flexible disk drive includes a case and a disk holder provided in the case. A flexible disk is mounted on the disk holder. A part of the disk holder abuts against an inner face of the case. Preferably, The part of the disk holder is a tip end portion of the disk holder. The tip end portion of the disk holder is bent in a slanted direction so as to enlarge an inlet of the disk holder for the flexible disk to be inserted.

Abstract: A system for exchanging digital data among a plurality of hand-held computer devices. Digital signals are written by a first hand-held device to a mini-cartridge that mini-cartridge is inter-operable among a class of hand-held device, each of which is equipped with a mini disk drive. A common digital data format is employed to further facilitate exchange of data between devices.

Abstract: A disk drive motor (5) for driving and rotating a recording medium (disk), a head (57) for recording or playing back information to/from this disk, and a head drive mechanism for driving the head, are disposed inside a case body (15, 16) of the magnetic recording unit. A lid body (17) to close the cartridge insertion slot (18) is disposed the case body (15, 16) at a position facing the cartridge insertion slot (18). When the lid body (17) falls down the front side and the cartridge insertion slot (18) is opened, the top face of the lid body (17) becomes substantially on the same plane as the top face of the frame plate where the disk drive motor (5) and the head (17) drive mechanism are mounted.

Abstract: An electronic apparatus includes a moving support member moving in a back-and-forth direction of the electronic apparatus, an upper-end support member for supporting an upper end of a front panel in a movable manner, and a lower-end support member supported to the moving support member in a rotary manner, in which when the moving support member moves to the front side of the electronic apparatus, the upper-end support member moves the upper end of the front panel in such a manner that the front side surface of the front panel may face the upward and also restricts the inclination of the front panel by means of the upper-end support member while accordingly turning the lower-end support member as holding up the lower end of the front panel.

Abstract: A recording medium loading apparatus having a carrier unit 70 for transferring the disc 11, 12 or disc cartridge 13 between an eject position and a loaded position by moving within a holder 40. When the carrier unit 70 transfers the disc cartridge 13, the disc cartridge 13 is held by a cartridge lever 77. The cartridge lever 77 is capable of moving between a first position protruding from the carrier unit 70 in an arrow Y2 direction to hold the disc cartridge 13 and at a second position estranging from the first position in an arrow Y1 direction. The recording medium loading apparatus is capable of loading various types of disc-shaped recording medium and reduces the installation space.

Abstract: The invention presents an optical drive loader with a manual disk ejecting mechanism comprising a frame, a disk receiving apparatus, a speed reduction apparatus, a driving apparatus, and a disk ejecting actuating part. Relying on the disk ejecting actuating part positioned on the frame, which is provided with a gear portion for driving the speed reduction apparatus and a roll stem portion positioned at the center of the gear portion extruding along the central axis, users can use a tool going through a through hole of the housing turning the roll stem portion to rotate the gear portion and enable the speed reduction apparatus to move the disk receiving apparatus to the feeding/ejecting position. A through hole is disposed on the housing corresponding to the roll stem portion, so as to avoid the through hole being disposed on the operation panel to affect the appearance of the operation panel.

Abstract: A threader prevents misthreading of a flexible magnetic media when it is inserted into a disk drive. The threader is situated in the disk drive such that it has a height greater than a height of a lower half of a load ramp, upon which the disk driver's rotary actuator parks when it is not reading or writing to the disk. Preferably, the threader is a pliable piece of material that is ramp shaped.

Abstract: Disclosed herein is a storage device including a turntable assembly movable between a raised position and a lowered position, a load plate adapted to move from a first position to a second position in concert with insertion of a carrier into the storage device, and a spring for biasing the load plate to the second position. When the load plate is moved to the second position, the turntable assembly is moved to the raised position. The storage device further includes a base and a timing arm mounted on the base so as to be pivotally movable between a third position for maintaining the load plate in the first position and a fourth position for disengaging the load plate in concert with the insertion of the carrier to allow movement of the load plate to the second position.

Abstract: To provide a removable disk drive which can discharge static electricity with which a recording disk is charged, which does not produce noise and metal powder when a spindle motor shaft is rotated, and the electric power consumption of which is small. A removable disk drive 10 is provided with an electrostatic brush 5 disposed between a spindle motor shaft 1 and a housing 4 and formed of a conductive material. When operation of inserting a recording disk 6 in the removable disk drive 10 is on the way, the electrostatic brush 5 is in contact with the spindle motor shaft 1 and the housing 4 to discharge static electricity with which the recording disk 6 is charged to the housing 4 through the spindle motor shaft 1 and the electrostatic brush 5. After the recording disk 6 is completely inserted in the removable disk drive 10, the electrostatic brush 5 is out of contact with the spindle motor shaft 1 to prevent noise and metal powder from being produced when the spindle motor shaft 1 is rotated.

Abstract: A system for exchanging digital data among a plurality of hand-held computer devices. Digital signals are written by a first hand-held device to a mini-cartridge that mini-cartridge is inter-operable among a class of hand-held device, each of which is equipped with a mini disk drive. A common digital data format is employed to further facilitate exchange of data between devices.

Abstract: To perform ejection of a disk cartridge and head loading (landing) and/or unloading (takeoff) with a single driving source and prevent damage to a disk upon head landing and takeoff. A cam protrusion which is an outputting section of a geared motor is moved at a low speed and acts upon a head lifting mechanism by which, by rotation of the geared motor in one direction (CW direction), ejection of a cartridge is performed, but by rotation in the other direction (CCW direction), landing of magnetic heads is performed for head loading of the magnetic heads.

Abstract: A flexible disc apparatus comprising a frame having a recording medium loading portion, a carriage portion, and a recording medium unloading mechanism portion, which comprises a medium holding portion which is arranged to be moveable along the loading and unloading direction of the recording disc and is provided with a medium holding portion which engages with one portion of the recording disc to maintain the recording disc at a predetermined space along the loading and unloading direction.

Abstract: A disk storage apparatus has a magnetic head (8) that is completely retracted outside of a disk cartridge, except upon a reading/writing operation. The magnetic head (8) is inserted into the disk cartridge (16) only upon the reading/writing operation. The disk storage apparatus can completely retract a rotation actuator to an outside of a disk cartridge. The disk storage apparatus can be reliably and stably operated and has a reduced overall thickness.

Abstract: In a high-density flexible disk drive, a color of at least a surface of a cover (22) (in addition, a color of at least a surface of an eject button (30)) is different from that of at least a surface of a body of a front panel (20). A user can visually distinguish the high-density flexible disk drive from a normal-density dedicated flexible disk drive in which a color of a surface of a cover is identical with that of a surface of a body of a front panel. Thus, a large-capacity flexible disk can be correctly inserted into the high-density flexible disk drive without being erroneously inserted into the normal-density dedicated flexible disk drive.

Abstract: A front shutter attaching structure comprises flanges formed on peripheral surfaces of coaxial pivots of a front shutter and hooks formed at a cover for covering an upper side of a main frame. The front shutter is attached to the main frame by inserting of the pivots into holes formed in side plates of the main frame. Because the flanges are impossible to be inserted into the holes of the main frame, they restrict movement of the front shutter in a direction along the pivots against the main frame. Each of the hooks is located between a door member of the front shutter and each of the flanges when the cover is fixed to the main frame. The hooks restrict movement of the flanges in the direction along the pivots at the base side of the pivots.

Abstract: A flexible disk drive includes a main plate. An ejecting plate is assembled on the main plate for sliding movement in only inserting and removing directions of a flexible disk. The flexible disk drive further includes a disk holder for holding the flexible disk. The disk holder has opposite side walls each having pins to be respectively inserted into cams provided in one of opposite side walls of the ejecting plate, and moves upward and downward according to sliding movement of the ejecting plate. Projecting portions are respectively provided on the opposite side walls of the disk holder, and a first guide portion which guides only upward and downward movement of the corresponding one of the projecting portions is provided on each of the opposite side walls of the main plate. Accordingly, the travel of the disk holder relative to the inserting and removing directions is restricted.

Abstract: A disk player has a disk cartridge for being loaded thereon, and accommodating a disk-type recording medium. The disk cartridge has a shutter arranged thereon, for performing slide-opening/closing in order to expose an information surface of the disk-type recording medium. The disk player includes a carrier mechanism for carrying the disk cartridge to an information regenerating location and an information recording location, and a shutter sliding mechanism for slide-opening/closing the shutter. The shutter assumes an intermediate position of sliding when the disk cartridge is located at one of the information regenerating location and. the information recording location, and assumes a terminal position of sliding when the shutter is located at the other one of the locations. The disk player also includes a driving mechanism including an engaging element and an engaged element which is separated from the engaging element when the information recording mechanism is not driven.

Abstract: In a thin floppy disk drive comprises a disk shutter arm (26), rotatably mounted on a disk holder (22), for opening and closing a shutter (43) of a floppy disk (40) and an eject lever (25), rotatably mounted on a main frame (13), having an eject stop part (253) engaged with a plate stopper portion (212) of an eject plate (21), the eject lever (25) has an eject protrusion (252a). The disk shutter arm (26) has a shutter hook part (261a) engaged with the eject protrusion so as to control a rotation operation of the eject lever when the floppy disk (40) is not inserted in the thin floppy disk drive. It is therefore possible to prevent the elect lever (25) from rotating over a predetermined rotation angle as far as the floppy disk (40) is not inserted in the thin floppy disk drive.