Alps Electric Co., Ltd.

Toru Sawada

Masao Okita

Ichiro Noguchi

Kazuo Kobayashi

Yasunari Takayama

Kazuo Kozumi

Takuya Nagai

Shinkichi Sasaki

Takuya Wakayama

Atsushi Masuda

Masao Ohkita

Osamu Shigenai

Yuji Inada

Makito Takigawa

Ryu Yunokuchi

Takashi Nakagawa

Kouzou Onodera

Daijo Shibata

Tetsuya Nomura

Sadahiro Takahashi

Tetsuo Ando

Takayuki Sasaki

A turntable device principally includes a horizontal rotation base and an up-and-down swinging mechanism, which are driven by VCMs. An optical apparatus is placed on supports, which are arranged on the horizontal rotation base, with a horizontal rotation shaft therebetween. The optical apparatus is directed up-and-down and right-and-left by movable pieces connected to movable coils of the VCMs, so as to constitute the turntable device. The optical apparatus is placed on the turntable.

Turntable device and optical apparatus

A disk drive comprising an upper head holder with has an arm portion extending laterally and placed on an upper plate, a carriage has a carriage lock for stopping longitudinal movements of the carriage, a lift bar is inserted between the arm portion of the upper head holder and the upper plate and is movable between upper, middle and lower stages, a brake portion of a stopper lever comes into engagement with the carriage lock of the carriage to stop longitudinal movements of the carriage, a lower plate lock means locks a backward movement of a lower plate, and a solenoid is interlocked with and actuates the lift bar, the stop lever and the lower plate lock means.

Disk drive capable of preventing ejection of magnetic recording medium even upon erroneous depression of eject button during work

A chucking device in a floppy disk drive, having a drive pin extending loosely through a drive pin through hole of a rotor yoke and also through a cutout portion of a magnetic disk and inserted loosely into a drive pin aperture formed in a center hub of a floppy disk, and further having a plate spring member mounted to the underside of the rotor yoke and formed so as to push the drive pin upward and outward. The lower end portion of the drive pin is loosely fitted in a cutout portion formed in the plate spring member, and the cutout portion of the magnetic disk has a conduction path for contact with the drive pin, the conduction path being inclined in a gradually retreating direction as the distance from the rotational axis of the rotor yoke becomes longer.

Chucking device in FDD

A chucking device in a floppy disk drive comprises a rotor yoke adapted to rotate in a predetermined certain direction with a center hub of a floppy disk placed thereon, a drive pin mounted loosely into a drive pin through hole formed in the peripheral portion of the rotor yoke and further inserted loosely into a drive pin aperture formed in the center hub, and a spring mounted to the rotor yoke and functioning to push the drive pin not only upward but also in a direction F away from a rotational axis of the rotor yoke. When the rotor yoke is rotated with the floppy disk placed thereon and with a center shaft inserted into a central aperture of the center hub, the drive pin is inserted into the drive pin aperture and comes into abutment, within the drive pin aperture, with both front edge and outer edge of the same aperture in the rotational direction of the rotor yoke.

Disclosed is an inexpensive structure for mounting a flexible printed circuit board to a hard circuit board without using a connector. The terminal section of the flexible printed circuit board is mounted to a holding member, which is secured to the hard circuit board to electrically connect the wiring pattern of the terminal section to the electric circuit of the hard circuit board, whereby it is possible to mount the flexible printed circuit board to the hard circuit board without using an expensive connector, thereby achieving an improvement in terms of cost and operability.

Flexible printed circuit board mounting structure and

A first and second rotary members are supported on a holder 3 secured to a main chassis of disk drive apparatus. The first rotary member includes a detecting portion. The second rotary member includes a contact portion that moves in and out of the insertion path of a disk cartridge to be inserted into the holder. When the disk cartridge is being inserted, an opening-and-closing pin opens the shutter of the disk. Through the detecting portion, the opening shutter rotates the first rotary member, which then rotates the second rotary member to thereby move the contact portion of the second rotary member out of the insertion path of the disk cartridge, allowing the disk cartridge to be inserted. If the shutter fails to open when the disk cartridge is being inserted, the contact portion of the second rotary member will remain in the insertion path and block the insertion of the disk cartridge.

Mechanism in disk drive apparatus for preventing insertion of a disk

A magnetic recording/reproducing device including a top cover having a plurality of leg portions 1e with cutouts that project from each side face of the top cover such that the location of a leg portion at one side face does not correspond to the location of a leg portion at the other side face; and a bottom cover having a plurality of retaining portions 2e in correspondence with the leg portions 1e at each side face of the lower cover formed by bending portions of the side faces. The top cover and the bottom cover are integrally engaged together by fitting the retaining portions into the cutouts of their corresponding leg portions. A plurality of top covers are successively press-cut from a metal plate such that a leg portion of a particular top cover is positioned between the leg portions of another top cover that is adjacent to the particular top cover, thus reducing the amount of scraps produced from the metal plate. Accordingly, the invention makes it possible to produce a magnetic recording/reproducing device at a lower cost.

Magnetic recording/reproducing device with retaining structure for

Cover structure for magnetic recording and reproducing device

The present invention relates to a head transferring mechanism of a magnetic recording/reproducing apparatus which transfers a magnetic head. In the head transferring mechanism 17 in which a hold case 19 is hinge-connected to a rear end portion of a carriage 18, a fitting bed 18p is formed on a central portion of the tip portion of the carriage 18 and an adhesive filling groove 18r and a clearance groove 18s are made in an upper surface of the fitting bed 18p to be close to each other. Further, after a lower magnetic head 20 is placed on the fitting bed 18p, a lower surface of the lower magnetic head 20 is adhered and fixed onto the fitting bed 18p through an adhesive 28 put in the adhesive filling groove 18r.

Magnetic head-mounted to a tip portion of a carriage via adhesive in an

Magnetic recording/reproducing device with chassis support structure

The present invention relates to a magnetic recording/reproducing apparatus. In the magnetic recording/reproducing apparatus, a shutter actuating pin and a locking claw are formed integrally with a rotating member, the rotating member is rotatably supported on a chassis, one end of a torsion coil spring wound around the rotating member is retained by the shutter actuating pin, and a bent portion of the other end of the torsion coil spring is retained by a retainer hole of a holder. Before loading of a disc cartridge, a slide plate is locked by the locking claw at a backward position, so that a holder is maintained at an unloading position, whereas, when the disc cartridge is loaded, the rotating member is rotated by the disc cartridge, so that locking by the locking claw is dismissed to allow the holder to be shifted to a loading position while enabling a shutter of the disc cartridge to be opened by the shutter actuating pin.

Magnetic recording/reproducing apparatus with magnetic disc

A disk drive particularly a disk drive into which a disk cartridge containing a magnetic disk as an information recording medium is loaded when used. A flexible printed circuit board mounting circuit parts for a spindle motor thereon is used as board and fixed to a back yoke, thereby constituting the spindle motor. A lower cover is provided with an opening, the flexible printed circuit board is interposed between a chassis and the lower cover, and the back yoke is assembled by being inserted into the opening of the lower cover. When the disk cartridge is inserted, it is obliquely inserted so that the disk cartridge will not strike against any magnetic heads.

Disk drive

A disk drive particularly, a disk drive into which a disk cartridge containing a magnetic disk as an information recording medium is loaded when used. A flexible printed circuit board mounting circuit parts for a spindle motor thereon is used as board and fixed to a back yoke, thereby constituting the spindle motor. A lower cover is provided with an opening, the flexible printed circuit board is interposed between a chassis and the lower cover, and the back yoke is assembled by being inserted into the opening of the lower cover. When the disk cartridge is inserted, it is obliquely inserted so that the disk cartridge will not strike against any magnetic heads.

A method of mounting a magnetic head to a case employs a jig having a grooved placing unit for placing the head and a support for the case formed at a predetermined height from the slidably contacting surface of the head. The method includes placing the slidably contacting surface of the head on the bottom of the placing unit of the jig to position the head in the placing unit, placing the case on the support to set its height at a predetermined gap with respect to the mounting surface of the head, and filling a bonding agent in the gap between the mounting surfaces of the case and the head.

Method of mounting a magnetic head

A magnetic head assembly comprises a carriage on which a first magnetic head is mounted for performing read/write with respect to one face of a disk, a second magnetic head also mounted on the carriage opposite to the first magnetic head for performing read/write with respect to the other face of the disk, and a hold case coupled turnably via a leaf hinge spring to the carriage, wherein the first magnetic head is attached via a gimbal spring to the carriage, and the second magnetic head is secured to the hold case, and is characterized in that the carriage has a support portion abutting directly on the hold case inclusive of the leaf hinge spring to support the same, so that the hold case is supported turnably with the support portion serving as a supporting point, whereby the reference plane of the hold case is defined by the support portion, so that accuracy can be ensured for the reference plane of the second magnetic head with respect to the disk and an enhancement of the follow-up performance can contribute to an improvement of the read/write characteristic.

Growing community of inventors

Fukushima-ken, Japan

Toru Sawada