JP2598785B2 - Mounting device for actuator for operating magnetic head in floppy disk drive - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a magnetic field for rotating a floppy disk composed of a magnetic sheet used as an external storage medium of a computer or the like and reading and writing information from / to the floppy disk. BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a floppy disk drive having a head, and more particularly to a magnetic head operating actuator mounting device capable of easily mounting an actuator for movably operating the magnetic head.

[Conventional technology]

Generally, a floppy disk drive device rotatably holds a floppy disk, and has a magnetic head for reading and writing required data on one or both sides thereof. Therefore, when rotating this floppy disk, the rotating spindle is engaged with the center of the floppy disk,
When the operation is completed, the spindle is detached from the floppy disk. The floppy disk drive may be provided with a clamp protruding from the opposite side of the floppy disk from the motor hub so that the center of the floppy disk is held on the rotating main shaft, or a floppy disk is attracted by magnet without a clamp. Further, the rotating main shaft is fixed so as not to move laterally, and critical dimensions of the hub center and the hub height with respect to the magnetic head are fixed.

Conventionally, a floppy disk used in a floppy disk drive having such a structure is provided with a cartridge provided with an opening for directly contacting a clamp for holding the disk or for contacting two heads with the floppy disk. Since the storage area of the floppy disk is exposed, the area on the recording surface of the floppy disk is exposed.

From such a viewpoint, the motor for driving the floppy disk is mounted on a frame rotatable around the pivot of the driving device, and a groove edge member is mounted on an end of the frame. When the cartridge is inserted into the floppy disk drive, the opening for closing the cartridge is closed, and when the cartridge is inserted into the floppy disk drive, the groove edge member is moved from the opening. The frame moves from its position of engagement with the floppy disk and moves the groove edge member to its closed position after inserting the cartridge, whereby the frame rotates about its pivot and the motor spindle Moves toward the floppy disk, magnetically attracts and holds the hub, and places the floppy disk on a Bernoulli plate fixed to its drive. Floppy disk drive that is configured to contact arrangement has been proposed (JP 57-1814
No. 87).

However, in this type of floppy disk drive, the magnetic head is attached to the other end of an actuator arm having one end fixed to a rotating shaft, and the rotating shaft is provided with a plate-like magnet having N pole and S pole. The magnetic circuit thus constructed is connected to the center of rotation of a card-shaped actuator composed of a printed coil. In this case, since the actuator is a card type formed of a print coil, it is necessary that the operation in the magnetic circuit is stable and well-balanced. Therefore, the actuator to which the actuator arm supporting the magnetic head is fixed is fixed. It is required that the spindle be mounted easily and easily for maintenance.

[Problems to be solved by the invention]

In the above-mentioned conventional floppy disk drive, when mounting a magnetic head, a card-type actuator which is provided to be rotatable in a magnetic circuit via an actuator spindle with respect to an actuator arm for supporting the magnetic head has a high precision of its operating position. Is required,
The installation is cumbersome, and it is difficult to perform partial maintenance.

Accordingly, an object of the present invention is to provide a floppy disk which forms an appropriate airflow and air layer on a Bernoulli plate, stably rotates the floppy disk, and records and reproduces data on the floppy disk by a magnetic head. In a disk drive device, an actuator for operating a magnetic head in a floppy disk drive device which can easily and properly mount an actuator for operating the magnetic head so that its positioning is easy and partial maintenance is possible. To provide a mounting device.

[Means for solving the problem]

The mounting device of the actuator for operating the magnetic head in the floppy disk drive according to the present invention has a Bernoulli plate (14) which is loaded with a floppy disk (12) housed in a cartridge and arranged so as to face the floppy disk at the time of loading. ), A spindle motor (18) having a drive shaft (20) that engages with the loaded floppy disk and rotationally drives it, and reads and writes data by appropriately moving each track of the rotationally driven floppy disk. The Bernoulli plate (14)
Drive shaft (20) of the spindle motor (18) in the center of
And an opening (24) for projecting the motor head (22) and an elongated hole (26) for movably facing the magnetic head (28) at a distance from the opening (24) in the radial direction. In a floppy disk drive comprising these assembled in a frame (10), the magnetic head (28) is connected to an actuator arm (30).
The other end (33b) of the actuator arm (30) is fixed to one end (33a) of the actuator spindle (3).
2), and the actuator spindle (32) is connected to the frame via a bearing (34) so that the magnetic head (28) faces a long hole (26) provided in the Bernoulli plate (14). A card-shaped actuator (38) having a print coil that pivotally moves in a magnetic circuit while rotatably holding the body (10) is mounted on the actuator spindle (32), and the card-shaped actuator (38) is mounted on the actuator arm. (30) and the bearing (34), with the other end (33b) of the actuator arm (30)
Is provided with a pair of upper and lower clamps (36a, 36b) detachably attached to the actuator spindle (32), while the mounting base (4) of the card type actuator (38) is provided.
8) is provided with a notch (50) for fitting with the actuator spindle (32), and the pair of clamps (36a, 36b)
Are arranged with a slight gap up and down, and the mounting base (48) of the card-shaped actuator (38) is inserted into this gap, and the clamp (52a, 52b, 52c) is inserted through a set screw (52a, 52b, 52c). 36a, 36b) and the mounting base (48) are screwed and fixed in a predetermined positional relationship.

[Action]

According to the mounting device of the actuator for operating the magnetic head in the floppy disk drive device according to the present invention, the magnetic head has a fan-shaped card shape having a print coil that pivots at one end in a magnetic circuit via the actuator spindle. The other end of the actuator arm connected to the actuator is provided. In this case, the actuator spindle is provided with a clamp for holding and fixing the base of the card type actuator, and this clamp is used to properly position the magnetic head and the card type actuator. By providing the set screw as a reference point for performing the operation, the attachment / detachment and replacement of the card-shaped actuator can be performed easily and with high accuracy. In this case, the card-shaped actuator is provided with a notch portion that fits into the actuator spindle at the center of the mounting base and a pair of screw holes that define a reference point of the mounting position with respect to the clamp. Positioning becomes easier.

〔Example〕

Next, an embodiment of a mounting device for a magnetic head operating actuator in a floppy disk drive according to the present invention will be described in detail with reference to the accompanying drawings.

FIGS. 1 to 4 show an embodiment of a floppy disk drive incorporating a magnetic head operating actuator mounting device according to the present invention, and FIG. 5 shows the magnetic head operating actuator. FIG. 4 is a plan view of a main part showing a state where the actuator arm provided with the magnetic head is mounted on a driving actuator spindle of the actuator arm. In FIG. 1, reference numeral 10 denotes a frame for incorporating a floppy disk drive, and a Bernoulli plate 14 for arranging a floppy disk 12 stored in a cartridge on one side of the frame 10 has a stopper 16. Fixed through. In the central portion of the Bernoulli plate 14 where the floppy disk 12 is arranged, a center opening 24 for inserting a drive shaft 20 of a spindle motor 18 and a hub 22 for supplying air and rotating the floppy disk 12 is provided. An elongated hole 26 extending in the radial direction is provided apart from the center opening 24, and the magnetic head 28 is displaceably inserted through the elongated hole 26.

Therefore, in this embodiment, as shown in FIGS. 1 to 4, the magnetic head 28 is
And the other end 33b is attached to the actuator spindle 32. The actuator spindle 32 is rotatably held by a part of the frame body 10 via a bearing 34.
The base of a card-shaped actuator 38 having a print coil formed in a substantially fan shape is clamped and fixed by a pair of clamps 36a and 36b. In this case, the card-shaped actuator 38 is provided with magnetic plates 40 and 42 constituting a magnetic circuit at a distance above and below the card-shaped actuator 38, respectively.
A pair of plate-like magnets 44 having a pole and an S pole are symmetrically arranged. As a result, the card-shaped actuator 38
The turning position can be controlled by supplying a control current to the coil. Reference numeral 46 denotes a head harness for connection with the magnetic head 28.

Therefore, as described above, the card type actuator 38
And the actuator arm 30 are mounted so as to be in a vertical positional relationship with the actuator spindle 32 with the bearing 34 interposed therebetween. Since no inclination or the like occurs, the magnetic head 28 is disposed so as to be displaceable in the long hole 26.
It does not affect the state of movement.

However, with regard to the configuration of the mounting device for the magnetic head operating actuator according to the present invention, the card type actuator
The relationship between 38 and the clamps 36a and 36b for fixing and holding the same to the actuator spindle 32 will be described with reference to FIG. That is, the mounting base 48 of the card-shaped actuator 38 in the present embodiment extends with substantially the same width as the outer diameter of the clamps 36a and 36b, and a cutout portion 50 that fits with the actuator spindle 32 is provided at the center thereof. ing. On the other hand, a pair of upper and lower clamps 36a and 36b
6a is detachably attached to the actuator spindle 32, and the lower clamp 36b is fixed to the actuator spindle 32. Then, the upper clamp 36
a is removably fixed to the lower clamp 36b at positions substantially equally divided into three parts by set screws 52a, 52b, and 52c, respectively. Therefore, the mounting base of the card-shaped actuator 38
Also in 48, a pair of set screws 52 of the upper clamp 36a
Screw holes 54b and 54c are drilled corresponding to the mounting positions of b and 52c. Therefore, when fixing the card-shaped actuator 38 thus configured to the clamps 36a, 36b connected to the actuator spindle 32, a pair of set screws 52b, 5
2c is removed from the upper clamp 36a in advance, and only the set screw 52a is attached.
A slight gap is formed between the upper clamp part 36a and the lower clamp 36b by the circular boss part 36c of 6a. Next, the card-shaped actuator 38 is grasped and its mounting base 48 is inserted between the upper clamp 36a and the lower clamp 36b. At this time, the mounting base 48 of the card type actuator 38
The notch 50 provided in the mounting base 48 is fitted into the actuator spindle 32 and further guided by the circular boss 36c, and the screw holes 54b, 54c formed in the mounting base 48 and the upper clamp 36a
And the mounting positions of the set screws 52b and 52c of the set. After a while
By screwing the set screws 52b and 52c into the upper clamp 36a and tightening the set screws 52a, the card type actuator 38 can be quickly and easily attached to the clamps 36a and 36b. Furthermore, by making the height of the circular boss portion 36c slightly smaller than the thickness of the card-shaped actuator 38, the other end 33b to which the actuator arm 30 is attached can be securely held.

In this embodiment, the card-shaped actuator 38
For example, as shown in FIG. 2, the distance L between set screws 56a and 56b for fixing the upper magnetic plate 40 to the lower magnetic plate 42 is set to the magnetic plates 40 and 42 magnetically surrounding the magnetic plates 40 and 42. By making the overall width l of the card-shaped actuator 38 larger, the attachment / detachment / replacement of the card-shaped actuator 38 is further facilitated without removing the upper magnetic plate 40.

〔The invention's effect〕

As is apparent from the above-described embodiment, according to the present invention, regarding the mounting configuration of the clamps 36a and 36b for mounting the card-shaped actuator 38, the upper clamp 36a is divided into three equal angles with respect to the actuator spindle 32. By being fixed with the two set screws 52a, 52b, 52c, one set screw 52a and the circular boss portion 36c serve as a reference point of the mounting position of the magnetic head 28, and the other two set screws 52a, 52b, 52c. 52c may be a reference point for positioning the card-shaped actuator 38 symmetrically with respect to the reference point. Therefore, the mounting apparatus for a magnetic head operating actuator according to the present invention has an excellent advantage that not only the work of attaching and detaching the card-shaped actuator 38 can be facilitated, but also the positioning accuracy of the mounting position with respect to the magnetic head can be improved. Have.

Further, in the present invention, if the card-type actuator is set so that it can be attached and detached without removing the magnetic plate, the card-type actuator can be replaced without disturbing the magnetic circuit formed by the magnetic plate. The following advantages are also obtained.

Further, the mounting device of the actuator for operating the magnetic head according to the present invention employs a configuration in which the card-shaped actuator and the actuator arm are mounted so as to be in a vertical positional relationship with the actuator spindle with the bearing interposed therebetween. Since the actuator spindle does not tilt due to the work of mounting the card type actuator, the card type actuator can be mounted on the actuator spindle without affecting the moving state of the magnetic head movably arranged in the long hole, Assembling work is facilitated, the number of working steps can be reduced, and not only is the configuration simple, but also high-precision positioning with respect to the magnetic head can be achieved simply by coupling to one end of the actuator spindle via a clamp. Easy production and mass production It contributes effect is very large cost reduction in this kind floppy disk drive.

The preferred embodiment of the present invention has been described above. However, it is a matter of course that various design changes can be made without departing from the spirit of the present invention.

[Brief description of the drawings]

FIG. 1 is a partially cut-away plan view of a floppy disk drive of a floppy disk drive device showing an embodiment of a magnetic head operating actuator mounting apparatus according to the present invention, and FIG. 2 is a floppy disk drive shown in FIG. Schematic rear view of the device,
FIG. 3 is a sectional view taken along line III-III of FIG. 2, and FIG.
FIG. 5 is a sectional view of a main part taken along line IV-IV of FIG. 5, and FIG. 5 is a plan view of a main part showing a state where the actuator for operating the magnetic head shown in FIG. 2 is attached to an actuator spindle for fixing an actuator arm provided with a magnetic head. FIG. 6 is a right side view of FIG. 5 and shows a main part of the clamp in a mounted state. 10 ... frame, 12 ... floppy disk 14 ... Bernui plate, 16 ... stopper 18 ... spindle motor, 20 ... drive shaft 22 ... motor hub, 24 ... central opening 26 ... slot 28 ... Magnetic head 30 ... Actuator arm 32 ... Actuator spindle 33a ... One end (of actuator arm 30) 33b ... Other end (of actuator arm 30) 34 ... Bearing, 36 ... Clamp 38 ... Card type actuator 40: Magnetic plate (upper), 42: Magnetic plate (lower) 44: Flat magnet, 46: Head harness 48: Mounting base, 50: Notch 52: Set screw, 54 …… Screw hole 56 …… Set screw

Claims (1)

(57) [Claims] A floppy disk (12) accommodated in a cartridge is loaded, and a Bernoulli plate (14) arranged so as to face the floppy disk at the time of loading, engages with the loaded floppy disk, A spindle motor (18) having a drive shaft (20) for rotationally driving the magnetic head; and a magnetic head (28) for appropriately moving each track of the rotationally driven floppy disk to read and write data. An opening (24) for projecting the drive shaft (20) of the spindle motor (18) and the motor hub (22) is provided at the center of (14), and is moved radially away from the opening (24). Possible magnetic head (28)
The magnetic head (28) is provided with one end (33a) of an actuator arm (30) in a floppy disk drive device provided with a long hole (26) facing the To the actuator arm (3
0) the other end (33b) to the actuator spindle (32)
And the magnetic head (28) is attached to the Bernoulli plate (1).
The actuator spindle (32) is rotatably held on the frame (10) via a bearing (34) so as to face the slot (26) provided in 4), and the actuator spindle (32) rotates in the magnetic circuit. A card-shaped actuator (38) having a printed coil to be attached to the actuator spindle (32), and the card-shaped actuator (38) is coupled to the actuator arm (30) via the bearing (34); The other end (33b) of the arm (30) is provided with a pair of upper and lower clamps (36a, 36b) detachably attached to the actuator spindle (32). Four
8) is provided with a notch (50) for fitting with the actuator spindle (32), and the pair of clamps (36a, 36b)
Are arranged with a slight gap up and down, and the mounting base (48) of the card-shaped actuator (38) is inserted into this gap, and the clamp (52a, 52b, 52c) is inserted through a set screw (52a, 52b, 52c). 36. A mounting device for a magnetic head operating actuator in a floppy disk drive device, wherein said mounting base (48) and said mounting base (48) are screwed and fixed in a predetermined positional relationship.