JPS63142578A - Magnetic head adjusting device for floppy disk driver - Google Patents

Abstract

PURPOSE:To simply and properly set a projection of a head from a Bernoulli plate by providing amount base fitted with an actuator spindle freely adjustably to a driver main body by means of an adjusting screw. CONSTITUTION:A magnetic head 28 is fitted to other end of an actuator arm 30 fixed to the actuator spindle 32. On the other hand, the spindle 32 is fitted to the mount base 42 being a lower magnetic plate via a bearing 34 by means of an adjusting screw 60 and made adjustable freely to the driver main body. Through the constitution above, in turning the adjusting screw 60, the actuator arm 30 is moved vertically according to the mount base 42 to set the projection of the magnetic head 28 from the Bernoulli plate 14 simply and properly.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is a magnetic device that rotates a floppy disk made of a magnetic sheet used as an external storage medium for computers, etc., and reads and writes information on the floppy disk. Relating to a floppy disk drive device equipped with a head,
In particular, the present invention relates to a magnetic head adjustment device in which a magnetic head support mechanism is configured to be adjustable so that the contact positioning of the magnetic head with respect to the floppy disk surface can be adjusted and set appropriately.

[Conventional technology]

Generally, a floppy disk drive device rotatably holds a floppy disk, and a magnetic head for reading and writing required data is placed in contact with one or both sides of the floppy disk.

Therefore, when the floppy disk is rotated, the rotating main shaft is engaged with the center of the floppy disk, and when the operation is finished, the main shaft is removed from the floppy disk. In addition, some floppy disk drive devices are provided with a clamp protruding from the opposite side of the floppy disk motor hub to hold the center of the floppy disk on the rotating main shaft, and others are magnetically attracted without a clamp. Furthermore, this rotational spindle is fixed so as not to move laterally, and the critical dimensions of the hub center and hub height relative to the magnetic head are fixed.

However, conventionally, the floppy disk used in a floppy disk drive device configured in this way is a cartridge with an opening for directly contacting the clamp holding the floppy disk, or for bringing two heads into contact with the floppy disk. Since a certain area of the recording surface of the floppy disk is exposed, it is easily exposed to dust, dirt, fingerprints, scratches, etc.

From this point of view, the motor that drives the floppy disk is attached to a frame configured to be rotatable around the axis of the drive device, and a grooved edge member is attached to the end of this frame, and this grooved edge member is attached to the edge of the floppy disk. An opening for inserting the stored cartridge into the floppy disk drive is closed, and then when the groove edge member is moved from the opening when inserting the cartridge into the floppy disk drive,
The frame is rotated about its pivot point so that the motor is moved out of engagement with the floppy disk, and after insertion of the cartridge the frame is rotated about its pivot point by moving the channel edge member to its closed position. A floppy disk drive device was proposed in which the main shaft of the motor moves toward the floppy disk and magnetically attracts and holds its hub, and the floppy disk is placed close to a Bernoulli plate fixed to the drive device. (Unexamined Japanese Patent Publication No. 57-181)
No. 487).

However, in this type of floppy disk drive, the magnetic head is attached to the other end of an actuator arm whose one end is fixed to a rotating shaft, and the rotating shaft is equipped with a flat magnet having an N pole and an S pole. The magnetic circuit is connected to the center of rotation of a card-shaped actuator made of a printed coil. In this case, the position of the floppy disk facing the Bernoulli plate during operation is not necessarily on the same horizontal plane at its outer and inner circumferences due to the air flow and air layer formed therebetween. Therefore, in order to properly record and reproduce data, it is necessary for the magnetic head that contacts the floppy disk to change its protruding position from the Bernoulli plate at its inner and outer peripheries. Therefore, in manufacturing this type of floppy disk drive device, it is required that the mounting position of the magnetic head can be adjusted.

[Problem that the invention seeks to solve]

In the conventional floppy disk drive device mentioned above,
When installing a magnetic head, the shape of the actuator arm that supports it is restricted based on the setting of its natural frequency, so installing and fixing the magnetic head is extremely troublesome, and the mounting position relative to the Bernoulli plate is also difficult. Since the design is fixed in advance, it is difficult to easily adjust for errors that occur during assembly.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a floppy disk which is configured to stably rotate a floppy disk by forming an appropriate air flow and air layer on a Bernoulli plate, and to record and reproduce data on the floppy disk using a magnetic head. In a disk drive device, the position of the magnetic head can be easily adjusted at the tip of the actuator arm, and the magnetic head can be easily fixed, and the magnetic head can be held against the bearing of the actuator spindle that supports the actuator arm. An object of the present invention is to provide a magnetic head adjustment device for a floppy disk drive device in which the position of the magnetic head can be easily adjusted by fixing a mounting board to the main body with adjustable screws.

[Means for solving problems]

A magnetic head fixing device for a floppy disk drive according to the present invention includes a floppy disk housed in a cartridge loaded therein, a Bernoulli plate disposed to face the floppy disk during loading, and a Bernoulli plate arranged to face the floppy disk loaded in the cartridge. The spindle motor has a drive shaft that engages and rotates the floppy disk, and a magnetic head that appropriately moves each trunk of a rotationally driven floppy disk to read and write data. In the floppy disk drive device, the magnetic head is provided with an opening through which the drive shaft of the motor and the motor hub protrude, and an elongated hole through which the magnetic head is movably spaced apart in the radial direction from the opening. is provided at the other end of an actuator arm that connects one end with a card-shaped actuator having a printed coil that rotates in a magnetic circuit via an actuator spindle, and fixes the actuator spindle to a mounting board via a bearing. This mounting board is adjustably attached to the main body of the floppy disk drive via an adjustment screw, and the amount of protrusion from the Bernoulli plate of the magnetic head that rotates relative to the inner and outer peripheries of the floppy disk can be adjusted in an adjustable manner. It is characterized by

In the above magnetic head adjustment device, the adjustment screw is arranged on the Y axis parallel to the neutral position of the actuator arm that supports the magnetic head, and on the X axis that is perpendicular to the Y axis and passes through the center of the actuator spindle. Preferably, a set screw is provided at the intersection with the actuator spindle, and the adjustment screw is provided on the X-axis of the mounting board on the opposite side of the actuator spindle from the set screw.

Furthermore, it is convenient to handle the adjustment screw if it is provided so that it can be adjusted directly from the Bernoulli plate side where the magnetic head is exposed.

[Effect]

According to the magnetic head adjusting device for a floppy disk drive according to the present invention, the magnetic head is coupled at one end to a fan-shaped card-shaped actuator provided with a printed coil that rotates in a magnetic circuit via an actuator spindle. The actuator spindle is provided at the other end of the actuator arm. The position of the magnetic head, which rotates relative to the inner and outer peripheries of the disk, can be easily adjusted to protrude from the Bernoulli plate by a predetermined amount. In particular, a set screw is provided on the Y-axis parallel to the neutral position of the actuator arm that supports the magnetic head, and at the intersection with the X-axis that is perpendicular to the Y-axis and passes through the center of the actuator spindle. The position of the mounting board is adjusted on the X-axis centering on the set screw by fixing the board and providing an adjustment screw on the X-axis line of the mounting board on the opposite side of the set screw with the actuator spindle at the center. Therefore, extremely appropriate and highly accurate adjustment of the magnetic head can be realized.

〔Example〕

Next, embodiments of a magnetic head adjusting device for a floppy disk drive according to the present invention will be described in detail with reference to the accompanying drawings.

1 to 4 show an embodiment of a floppy disk drive device incorporating a magnetic head adjusting device according to the present invention. In FIG. 1, reference numeral 10 indicates a frame body into which a floppy disk drive device is incorporated, and a Bernoulli plate 14 for arranging a floppy disk 12 is fixed to one side of this frame body 10 via a stopper 16. Ru. A drive shaft 20 of a spindle motor 18 and its hub 22 for supplying air and rotating the floppy disk 12 are located in the center of the Bernoulli plate 14 where the Flo Novi disk 12 is placed.
A central opening 24 is provided through which the magnetic head 28 is inserted, and an elongated hole 26 is formed that is spaced from and extends in the radial direction of the central opening 24, and a magnetic head 28 is displaceably inserted through the elongated hole 26. .

Therefore, in this embodiment, the magnetic head 28 is connected to the actuator arm 3 as shown in FIGS. 1 to 4.
0 and the other end is attached to the actuator spindle 32. This actuator spindle 32 is rotatably held by a part of the frame 10 via a bearing 34, and a card-shaped actuator 38 having a printed coil configured in a substantially fan shape is attached to this actuator spindle 32 via a clamp 36. fix the base of the In this case, the card-type actuator 38 has magnets @40 and 42 spaced apart above and below it, which constitute magnetic circuits, respectively, and has N with respect to the lower magnetic plate 42.
A pair of flat magnets 44.44 having poles and south poles are arranged symmetrically. As a result, the card-type actuator 38 can perform rotation position control by supplying a control current to its coil. In addition, reference number 4
Reference numeral 6 indicates a hend harness for connection with the magnetic head 28.

However, the configuration of the magnetic head adjusting device according to the present invention will be explained in detail. First, actuator spindle 3
A part of the outer casing of the bearing 34 supporting the magnetic plate 2 is firmly attached to a mounting board constituting the lower magnetic plate 42 via a mounting screw 50 (see FIG. 3). Further, this mounting board 42 is attached to a support plate 56 via setscrews 52 and 54 (see FIG. 4), and this support plate 56 is also configured to support the bearing 34 in the same manner as the mounting board 42. be done.

In this case, the setscrews 52 and 54 for attaching the mounting board 42 to the support plate 56 are placed on the Y axis parallel to the neutral position of the actuator arm 30 that holds the magnetic head, as shown in FIG. Set. The set screw 52 is provided at the intersection of the X-axis, which is perpendicular to the Y-axis and passes through the center of the actuator spindle 32. Also,
The X
The main body 5 of the floppy disk drive is placed at a predetermined position on the axis.
An adjustment screw 60 is provided for adjustable fixation to a portion of the 8 (see FIGS. 1, 2 and 4). Furthermore, the bearing 3 of the support plate 56 is attached by the set screw 52.
Attach a fixing screw 62 at the opposite position to 4, and abut the tip of this fixing screw 62 against the mounting board 42 (first
(see Figures and Figure 4). Note that coil springs 6 are attached to the adjusting screws 60 and fixing screws 62, respectively.
Attach 4°66 to prevent the screw from loosening.

Next, the adjustment work of the magnetic head adjustment device of this embodiment configured as described above will be explained.

In FIG. 1, the magnetic head 28 located at the neutral position of the elongated hole 26 opened in a part of the Bernoulli plate 14 is located at the outer circumferential side position (■) and the inner circumferential side position (■) of the floppy disk 12 mounted here. , it is necessary to set the amount of protrusion from the Bernoulli plate 14 to a predetermined standard value.

Therefore, in this embodiment, as shown in FIG.
Rotate around the axis in the X-axis direction. Therefore, the mounting position of the mounting board 42 relative to the main body 58 can be easily adjusted by adjusting the adjustment screw 60 (
(See Figure 4). In this case, the fixing screw 62 serves to prevent the bearing 34 from falling and vibration. In this case, the adjusting screw 60 and the fixing screw 62 are provided so that they can be easily operated from the mounting side of the Bernoulli plate 14, as shown in FIG.
It is convenient to handle because it can be adjusted and fixed while checking the positioning state of the handle. Further, when adjusting the position of the mounting board 42 using the adjustment screw 60, the set screw 52 serves as a fulcrum, so the set screw 52
It is preferable to elastically fix it using a wave washer or the like.

〔Effect of the invention〕

As is clear from the embodiments described above, according to the present invention,
By adjusting the bearing that supports the actuator spindle, which is the pivot point of the magnetic head, and the mounting board to which it is attached, in a direction perpendicular to the axis parallel to the neutral position of the actuator arm that supports the magnetic head, the floppy The amount of protrusion from the Bernoulli plate relative to the inner and outer peripheral sides of the disk can be easily and appropriately set using only the adjusting screw. Furthermore, since the adjustment screw is constructed so that it can be adjusted directly from the Bernoulli plate side from which the magnetic head protrudes, the adjustment work becomes easy and highly accurate position adjustment can be performed.

The magnetic head adjustment device according to the present invention not only has a simple configuration, but also achieves highly accurate positioning of the Bernoulli plate with respect to the horizontal plane, making it possible to simplify manufacturing and mass production, and to drive a floppy disk of this type. The effect of contributing to lower cost of the device is extremely large.

Although the preferred embodiments of the present invention have been described above, it goes without saying that various design changes can be made without departing from the spirit of the present invention.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway plan view of the floppy disk arrangement side of a floppy disk drive device showing an embodiment of the magnetic head adjustment device according to the present invention, and FIG. 2 is a schematic back view of the floppy disk drive device shown in FIG. 1. Fig. 3 is m-m of Fig. 2.
FIG. 4 is a cross-sectional view of the main part taken along the line IV--IV in FIG. 2. 10... Frame body 12... Floppy disk 14
... Bernoulli plate 16 ... Stop 18 ... Spindle motor 20 ... Drive Th axis 22 ... Motor hub 24 ... Center opening 26 ... Long hole 2
8... Magnetic head 30... Actuator arm 32... Actuator spindle 34... Bearing 36... Clamp 38...
・Card type actuator 40... Upper magnetic plate 42... Lower magnetic plate (mounting board)

Claims (3)

[Claims] (1) A floppy disk housed in a cartridge is loaded, and a Bernoulli plate is arranged to face the floppy disk when the floppy disk is loaded, and a drive shaft that engages with and rotates the loaded floppy disk. A spindle motor and a magnetic head for appropriately moving each track of a rotationally driven floppy disk to read and write data, and an opening in the center of the Bernoulli plate through which a drive shaft of the spindle motor and a motor hub protrude. In the floppy disk drive device, the magnetic head is provided with an elongated hole which allows the magnetic head to move movably from the opening in the radial direction. It is provided at the other end of the actuator arm that is connected to a card-type actuator equipped with a printed coil that rotates, and the actuator spindle is fixed to a mounting board via a bearing, and this mounting board is connected to a floppy disk drive via an adjustment screw. A magnetic head of a floppy disk drive device, characterized in that the magnetic head is adjustably attached to the main body of the device and configured to adjustably set the amount of protrusion from a Bernoulli plate of the magnetic head that rotates relative to the inner and outer circumferences of a floppy disk. Adjustment device. (2) In the magnetic head adjusting device according to claim 1, the adjusting screw is located on the Y-axis line parallel to the neutral position of the actuator arm that supports the magnetic head, and on the Y-axis line. A floppy disk, wherein a set screw is provided at an intersection with an X-axis line that is perpendicular to the actuator spindle and passes through the center of the actuator spindle, and the adjusting screw is provided on the X-axis line of the mounting board on the opposite side of the set screw with the actuator spindle as the center. Magnetic head adjustment device for drive unit. (3) In the magnetic head adjusting device according to claim 1 or 2, the adjusting screw is provided to adjust the magnetic head of a floppy disk drive device directly from the Bernoulli plate side exposing the magnetic head. Device.