Abstract: A flexible disk drive comprises a main frame, a magnetic head, a head assembly supporting the magnetic head so as to move the magnetic head in a tracking direction, and a guide rod fixedly attached onto the main frame by a metal fitting to guide the head assembly in the tracking direction. The main frame is made of a sheet metal and is provided with a recessed portion having a sidewall. The sidewall is faced to an end face of the guide rod with a small space left therebetween so that the recessed portion restricts the movement of the guide rod in the tracking direction.

Abstract: In the state where a terminal forming portion of a flexible circuit board is inserted through a first insertion hole formed in a main frame and a second insertion hole formed in a main printed circuit board, the terminal forming portion is bent so as to confront a back surface of the main printed circuit board. A terminal portion of the terminal forming portion is connected, by soldering, to a circuit pattern formed on the back surface of the main printed circuit board.

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 stepping motor in a thin-sized flexible disk drive is disposed on a pedestal portion in such a manner as to be spaced apart from a main wall of a main plate. The pedestal portion is made of a pedestal and a support metal member. The pedestal is formed by projecting a part of the main plate from a back-surface side thereof to an obverse-surface side thereof. A support plate is screwed to the pedestal to support the stepping motor and to rotatably support the extending end of the rotating shaft of the stepping motor. The pedestal is provided with a plurality of positioning projections formed to project from an obverse-surface side thereof, and a screwing hole for screwing the support metal member. The support metal member is provided with holes formed at positions respectively corresponding to the plurality of projections and the screwing hole.

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 a floppy disk drive having a main frame in which a floppy disk is inserted and a DD motor for rotatably driving the floppy disk inserted in the main frame, the floppy disk drive has a motor frame for mounting the DD motor thereon that is constituted by one piece integrated by the main frame. Preferably, the motor frame part may have a drawn-shape obtained by drawing the main frame. In addition, the floppy disk drive has an electronic processing arrangement for a frequency generation pattern. The electronic processing arrangement gives play to a function equivalent to the frequency generation pattern required to control the DD motor.

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 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: In a disk drive using a motor frame, the motor frame is provided with a projection preliminarily formed to protrude on its principal surface. The projection has a slit formed at its base. A printed circuit board is inserted into the slit to be engaged with the projection. The motor frame is provided with a positioning boss fitted into a positioning hole formed in the printed circuit board. The motor frame is further provided with a plurality of board holding portions bent upward on the principal surface to be engaged with end portions of the printed circuit board. Preferably, the positioning boss is formed by coining.

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 man 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 is coupled 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 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 is placed between the main frame and a cover which is opposite to the main frame.

Abstract: A flexible disk drive comprises a magnetic head, a head carriage, and a guide rod, attached by a metal fitting on a main frame of the flexible disk drive, guiding the head carriage in the tracking direction. The metal fitting has a longitudinal member which has first and second ends and is provided with a protruding/caved portion and a hole portion at opposite ends, respectively. The protruding/caved portion is formed on the first end of the metal fitting and engaged with a caved/protruding portion formed on the main frame. The hole portion is formed on the second end of the metal fitting and a male screw is screwed into a female screw formed on the main frame through the hole portion.

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 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 flexible disk drive includes a notched portion at a main frame portion arranged with a motor, a sub board includes a cut groove at an end portion thereof and a wire extended from the motor is held by the cut groove of the sub board and is connected to the main board. Thereby, there can be provided FDD capable of achieving a reduction in cost by a reduction in a number of parts and simplification of a structure thereof.

Abstract: A spindle motor structure includes a solenoid coil 1 provided above a flexible board 2 provided at one face of a base plate of FDD to align in a circumferential direction centering on one axis and a turn table covering the solenoid coil 1 and provided rotatably centering on the one axis. The spindle motor structure can provide FDD capable of achieving a reduction in cost by reducing a number of parts of PWB and the like using a silicon steel plate, i.e. silicon steel plate PWB.

Abstract: A stepping motor in a thin-sized flexible disk drive is disposed on a pedestal portion in such a manner as to be spaced apart from a main wall of a main plate. The pedestal portion is made of a pedestal and a support metal member. The pedestal is formed by projecting a part of the main plate from a back-surface side thereof to an obverse-surface side thereof. A support plate is screwed to the pedestal to support the stepping motor and to rotatably support the extending end of the rotating shaft of the stepping motor. The pedestal is provided with a plurality of positioning projections formed to project from an obverse-surface side thereof, and a screwing hole for screwing the support metal member. The support metal member is provided with holes formed at positions respectively corresponding to the plurality of projections and the screwing hole.

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: 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.

Abstract: In a method of mounting a drive motor to a frame member included in a disk drive which is for driving a flexible disk, the frame member is formed to have a main frame portion and a motor frame portion integrally formed to the main frame portion. The main frame portion defines a position of the flexible disk in the disk drive. Use is made of a jig adapted to engage with the main frame portion and a bearing portion provided to a stator of the drive motor. On positioning the stator relative to the motor frame portion, the jig is engaged with the main frame portion and the bearing portion. Under this state, the stator is fixed to the motor frame portion. After that, the bearing portion rotatably supports a rotation shaft coupled to a rotor of the drive motor.