JPS63229662A - Magnetic disk driving device - Google Patents

Abstract

PURPOSE:To attract a magnetic recording medium and to obtain stabilized relative relation with a magnetic head by supporting a magnetic head on the supporting plate having a recessed hollow part and providing the regulation plate opposing at specific intervals on the magnetic head via a magnetic recording medium. CONSTITUTION:The titled device is provided with the magnetic head supporting body 5c supporting a magnetic head 5 by projecting it into a recessed hollow part 5f and the regulating means 40a arranged at the position opposing to the supporting body 5c via a disk 30 and regulating the max. separation position of the disk from the magnetic head 5. A good recording/reproducing state is obtd. by opposing the head gap of the magnetic head 5 in the state of abutting in average or very approaching to the disk 30 by sucking the disk 30 into the recessed hollow part 5f and the disk 30 is regulated by the regulating means 40a, as well and at the disk rotation starting time the suction of the disk is immediately obtained to prevent the peeling off of the disk.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a magnetic disk drive device for recording or reproducing information on or from a disk-shaped magnetic recording medium.

[Conventional technology]

Magnetic disk drive devices, which record and reproduce information on and from disk-shaped magnetic recording media (hereinafter referred to as disks), are now widely used as external storage devices for information processing devices such as computers and word processors. It is being One of these information processing devices is called a still video floppy disk drive device for recording/reproducing still image signals. This disk drive is installed in still video floppy cameras.
By the same operation as a camera device using photosensitive film,
Image information is recorded on still video floppy disks.

As an example of this type of disk drive device,
There is one disclosed in Japanese Patent No. 57667. In this disk drive device, a holder that holds a disk cartridge containing a magnetic recording medium (hereinafter referred to as a disk) is pivotably supported at one end on a mounting board equipped with a rotary table, and the disk cartridge After inserting the disc into the holder, the holder is rotated toward the mounting board to load the disc in the disc cartridge onto the rotary table.

During loading, as shown in FIG. 13, a regulating plate 119 for applying loading pressure attached to the case cover 118 faces the magnetic head 158 with the disk 120 in between. This regulation plate 1
] 9 is locked to the case cover 118 by four locking pins, and gap adjustment screws 120 and 133 are screwed into the regulating plate 119. The spacing adjustment screws 126 and 133 are arranged so as to come into contact with the fixed shaft 123, which is the center of rotation of the rotary table 150, and the head of the height regulating pin 117, which is erected on the guide plate 112, which is fixed to the mounting board. The distance adjustment screws 126, 13
3 to rotate the regulating plate 11 for the magnetic head 158.
The height position of 9 can be adjusted. and,
Driver insertion hole 159 provided in case cover 118
Insert a screwdriver etc. from the
33 is designed to be easily rotated.

On the other hand, there is a device disclosed in Japanese Utility Model Publication No. 17806/1983 as a device that can stably contact the gap between the disk and the magnetic head without using the regulating plate 119 as described above.

This idea is for a device that records and reproduces signals by rotating an extremely thin magnetic disk sheet of at least 50μ or less at high speed enough to maintain it in a flat state by centrifugal force.The sheet base is partially recessed at the head mounting part. The magnetic head is characterized by a structure in which the head is accommodated in the recess so as to be adjustable and is slightly inclined in the direction opposite to the direction of rotation of the magnetic sheet in order to accommodate the deformation of the magnetic sheet passing through the recess to which the head is attached. With this configuration, the pressure between the magnetic sheet and the seat base becomes slightly lower than the external air pressure on the upper surface of the magnetic sheet, so the magnetic sheet sinks in the lowered head mounting surface, that is, in the recessed part. It claims the effect of stabilizing the contact between the helad gap of the magnetic head attached to the head mounting surface and the magnetic sheet.

[Problem that the invention seeks to solve]

By the way, in the former conventional example, the still video floppy disk drive device (hereinafter referred to as SVF device),
Two head gaps are provided for recording and reproducing frame images. Therefore, if the facing state of the disk with respect to the two head gaps and the loading pressure are different, a difference occurs in the recording and reproduction of each field image, and as a result, the image quality of the frame image deteriorates. Therefore, in the case of the former type of regulating plate structure, image adjustment by interval adjustment is extremely important. However, since the regulating plate is formed in a planar shape, the image quality changes significantly due to a slight difference in the slope of the solder, and there is a problem in that adjustment is extremely difficult. In addition, since the circumferential speed is different between the inner and outer diameter sides of the disc, the relative speed between the regulating plate and the disc is also different between the inner and outer diameter sides. There is also the problem that the relative positional relationship with respect to the image changes, causing minute differences in the images.

On the other hand, in the latter conventional example, the disk is in a state of being attracted by the recessed portion, and faces the disk gap of the magnetic head in a constant state due to the flexibility of the disk.

Therefore, recording/reproduction can be performed while maintaining a constant image quality without particularly regulating the position of the disk relative to the head gap.

However, this configuration can be applied to portable disk drives using disk cartridges, such as SVs built into cameras.
When applied to the F device, various disadvantages arise. First, disk cartridges are required to be compatible, and therefore, when loaded into an SVF device, there are variations in the relative positional relationship between the disk and the magnetic head, so when the disk is started, the recess immediately There is no guarantee that recording/playback will be possible after being absorbed. The second reason is that depending on the direction and posture in which the camera is held, the relative position of the disk and magnetic head changes slightly due to the influence of gravity, and for the same reason as the first, when the disk is started, immediate recording/playback is possible. There is no guarantee that it will happen. The third is recording/
If shock or vibration is applied from the outside during playback, the suction on the disc may be released, making recording/playback impossible during that time.

Therefore, for these reasons, the latter idea should be replaced by SVF.
It cannot be applied to portable disk drive devices such as devices.

The present invention has been made in view of the above technical background, and an object thereof is to provide a magnetic disk drive device that can realize frame images with excellent image quality without the need to adjust the regulating plate.

[Means for solving problems]

In order to solve the problems faced by the prior art and achieve the above object, the present invention provides a magnetic disk drive device that rotates a disk and records or reproduces information via a magnetic head, in which the magnetic head is placed inside a recess. This configuration includes a magnetic head support that projects and supports the magnetic head, and a regulating means that is disposed at a position facing the support with the disk interposed therebetween and that regulates the maximum separation position of the disk from the magnetic head.

[Effect]

According to the above means, it is possible to attract the disk into the concave portion and make the head gap of the magnetic head to face the disk in an averagely abutting or very close state, thereby realizing a good recording/reproducing state. By regulating the disc by the regulating means, it is possible to set the disc to be immediately attracted when the disc starts rotating, and to prevent the disc from peeling off.

〔Example〕

Hereinafter, one embodiment of the present invention will be described based on the drawings.

1 to 11 show SVs according to embodiments of the present invention.
This is to explain the F device, and Figure 1 shows the carriage,
FIG. 2 is a perspective view showing the entire structure; FIG. 3 is a plan view of main parts showing the biased state of the slide plate; FIG. 4 is a holder and cam. Main part plan view showing the state of the plate, FIG. 5(a),
(b).

(C) is an operation explanatory diagram showing the operation of the lock lever and eject spring; FIGS. 6 (a), (b), and (c) are operation explanatory diagrams showing the loading and unloading operation of the disk cartridge; FIG. (a) and (b) are operation explanatory diagrams showing the operation of the cam plate, Figures 8 (a) and (b) are operation explanatory diagrams showing the operation of the shutter, and Figure 9 is an operation explanatory diagram showing the operation of the holder, disk, and regulation plate. FIG. 10 is a rear view of the main parts of the SVF device mainly showing the eject lever, and FIG. 11 is a sectional view of the main parts of the SVF device mainly showing the lock lever.

The SVF device according to the embodiment includes a frame 1, a slide plate 2 that can slide vertically in FIG. a mounted carriage 6; a carriage transport mechanism 7 for transporting the carriage 6 in the radial direction of the disk;
It mainly consists of a turntable 8 on which a disk is placed, and a motor 9 that rotationally drives the turntable 8.

As shown in FIG. 12, the disk 30 as a magnetic recording medium rotationally driven by this disk drive device is
It is housed in a hard case 31 to form a disk cartridge, and a hub 33 of the disk 30 is exposed through an opening 32 in the center. This case 31
A shutter 34 made of a thin metal plate is slidably attached to the head insertion port 35 to close and open the head insertion port 35.

The frame body 1 is formed by bending a metal plate to have a substantially U-shaped cross section, and the side plate 16 has one part as shown in FIG.
As shown in FIGS. 2 and 6, guide grooves 18, 19, and 20 are cut in two places in 7, respectively. These guide grooves 18, 19° 20 are formed in an oval shape, and each has a horizontal portion 1 parallel to the bottom plate 1a of the frame 1.
8a.

19a, 20a and vertical portions 18b, 19b.

20b, and inclined portions 18C and 19C that connect the two.

20c. The side plate 16 further includes a cam plate 4, which will be described later, shown on the top surface of the holder 4 in FIG.
A clearance groove 42 is formed for the upward and downward movement of the 0 projection 41. The side plate 17 also has an elongated guide groove 4 from which an operating lever 36 for sliding the slide plate 2 toward the disk cartridge insertion side A protrudes, as shown in FIG.
3 is formed. A front plate 45 is attached to the opening of the frame 1 on the disk cartridge insertion side A.

As shown in FIG. 8, the front plate 45 has a disk cartridge insertion opening 46 formed on the upper side, and the disk cartridge insertion opening 46 is formed when the disk cartridge 30 is not inserted.
A door 47 for closing the insertion slot 46 is pivoted on the upper back side of the insertion slot 46 in a state where it is always biased in the closing direction, and a door 47 on the lower back side is
A shutter 48 that slides along the front plate 45. is installed. The shutter 48 is supported by one end of a pair of levers 49 and is always urged in the opening direction by a spring 50. When the disk cartridge 3 is unloaded, the other end of the lever 49 is connected to the disk cartridge insertion slot 466. It has reached the vicinity.

Further, on the bottom t&1a of the frame 1, a cam plate 4, which will be described later, is provided.
A height adjustment pin 1t is provided that comes into contact with the tip of the pad 40a and is capable of adjusting the height of the pad 40a relative to a support 5c, which will be described later. This height adjustment pin 1t is set so that it can be adjusted by rotating the threaded portion of the adjustment pin 1t from the back side of the bottom plate 1a.

As shown in FIG. 3, the slide plate 2 is attached to the bottom plate 1 of the frame 1.
On the a side, the spring 10 is always biased in the disk cartridge insertion direction (direction of arrow B), that is, the opposite disk cartridge insertion side Q, contrary to the conventional example, and the side plate 11 has a structure as shown in FIG. The side plate 12 has cam grooves 14 and 15 as shown in FIG.
is cut and grooved. These cam grooves 13, 14, and 15 have an inclined part S that slopes downward toward the disk cartridge insertion side A, a vertical Hu part on the upper side (the side opposite to the bottom plate la), and a vertical Hu part on the lower side (
The bottom plate 1a side) has a horizontal portion Hd. The protrusions 21, 22, 23 protruding from the side surface of the holder 4 are connected to the guide groove 1B via these cam grooves 13, 14°15.
, 19.20 respectively. As shown in FIG. 3, this slide plate 2 is loosely inserted into a pin 51 provided upright on the upper surface of the bottom plate 1a of the frame 1, and is secured to the upper surface by a retaining member 52 such as an E-ring or a speed washer. The disc cartridge 3 can be slidably attached to the disc cartridge 3 in a direction parallel to the direction in which the disc cartridge 3 is inserted and ejected.

Furthermore, a cam groove 64 is formed in the side plate 11 of the slide plate 2, as shown in FIG. 7, in which the protrusion 41 supported by a guide member 63 hanging down from the side surface of the cam plate 40 is guided. This cam groove 64 is connected to the cam plate 40.
A slope portion 64s that moves up and down and defines a lowering position,
The pad 40a is composed of a lower horizontal part 64d that defines the pressing position of the disk 30, and an upper horizontal part 64u that defines the raised position of the cam plate 40. It can take two positions.

As shown in FIGS. 2 and 4, the holder 4 has a holding portion 53 for the disk cartridge 3 having a U-shaped cross section on both sides when viewed from the disk cartridge insertion side A, and connects both holders 53 on the side opposite to the bottom plate. A top plate 54 is provided. 4 and 7 on the side surface 55 of the holder 4 of the 16 side plates.
As shown in the figure, a spring piece 57 that supports the protrusion 21 is suspended, and the protrusion 22.2 is attached to the side surface 56 on the side plate 17 side.
3 is installed, and the disk cartridge 3
An engagement lever 58 whose tip engages with an engagement groove 38 formed on the side surface of the case 31 is provided. The top plate 54 of the holder 4 has an insertion opening 59 into which the pulse generation sensor 39 is inserted, and a pad insertion opening 60 into which the pad 40a of the cam plate 40 serving as a height position regulating means for the disk 30 is inserted. A support plate 61 for supporting the pulse generation sensor 39 is provided near the insertion port 59.
is attached, and a cam plate 40 is swingably attached to the opposite disk cartridge insertion side Q of the pad insertion opening 60 via a support shaft 62.

The cam plate 40 is always attached to the frame body 1 by the leaf spring 63.
is biased in the direction of the bottom plate 1a. In addition, on the anti-disk cartridge insertion side Q of the holder 4, there are
As shown in the figure, the eject lever 66 and the lock lever 2
9 are each swingably attached via a support shaft 66b, and a shutter closing spring 67 made of a wire spring is attached to the side surface 55 side.

The eject lever 66 is shown in FIGS. 1, 5, and 10.
As shown in the figure, the pivot portion 66c, which is formed in a hook shape and is pivotally supported by the support shaft 66b, is parallel to the bottom plate 1a of the frame 1, and the operating portion 66d, which the disk cartridge 3 contacts, extends from the pivot portion 66c. They are formed vertically and their longitudinal directions are almost at right angles to each other. This eject lever 66
A small protrusion 66e that engages with a notch groove 29c formed in the lock lever 29, which will be described later, is also provided upright on the shaft support portion 66c. As can be clearly seen from FIGS. 1 and 10, this eject lever 66 is equipped with a tension spring 66.
a indicates the locking hole 66f drilled in the operating portion 66d and the frame 1;
It is stretched between the locking holes 1f drilled in the back plate 1e. As a result, the operating end 66g of the eject lever 66 is always biased clockwise in FIG. 1.

On the other hand, the lock lever 29 is pivotally supported on the same support shaft 66b.
is constantly biased clockwise in FIG.
When the lock lever 29 is positioned in the locking groove 4, the protrusion of the lock lever 29
4 to define the position of the slide plate 2. This position is a standby position for loading the disc cartridge 3, where the holder 4 is closest to the front plate 45 and furthest from the turntable 8, and the disc cartridge insertion slot 46 and the cartridge insertion slot 28 are at the same level. be.

As shown in FIG.
9f is notched, and the small protrusion 66e is in this notch #29.
It is disposed at the upper part of the pivot portion 66c of the eject lever 66 in the figure when it is loosely inserted into the eject lever 66. As a result, the clockwise rotation of the eject lever is controlled by the small protrusion 6.
It is defined by the contact position between 6e and the notch groove 29f.

As shown in FIG. 1, the carriage 6 is moved by a carriage transfer mechanism 7 consisting of a stepping motor 24, a screw shaft 26 on which an intermittent drive screw 25 is formed, etc.
The magnetic head 5 is moved in the radial direction of the disk 30 along the guide shaft 27, and the magnetic head 5 provided on the right end side of the carriage 6 is positioned at a desired recording track position to perform recording/reproduction.

As shown in FIG. 9, this magnetic head 5 has two [magnetic heads 5a] for producing a frame image.

5b, and is supported and fixed approximately at the center of a disc-shaped support 5c, and the support 5C is a composite of the disc 30.
It is attached to the carriage 6 substantially parallel to the . This support body 5c has a peripheral edge 5d formed slightly higher than a central part 5e, and a recessed part 5f formed inside the peripheral edge 5d. In this example, the outer diameter of the support plate 5c is 7.
The inner diameter of f is set to 6 mm, and the depth of the recessed portion 5f is set to 100 μm.

In addition, the frame 1 on the anti-disk cartridge insertion side Q in Figure 1
A motor 70 is provided above.

Further, a reduction gear group 71 is provided on the drive shaft side of the motor 70.
is provided, and the output end of the final stage gear of the reduction gear group 71 can be latched to a part of the same insertion side Q of the slide plate 2, so that the output end is attached to a part of the slide plate 2 at the time of ejection. By locking, the slide plate 2 can be slid toward the disk cartridge insertion side A, that is, toward the front plate 45.

Next, the operation of the disk drive device configured as described above will be explained.

FIG. 2 is a perspective view schematically showing the disk drive device before the disk cartridge 3 is inserted. In this state, the slide plate 2 is pushed against the elastic force of the spring 10 to the side closest to the disk cartridge insertion side A, that is, the front plate. 45, and the protrusion 29b of the lock lever 29 is located at the position closest to the lock lever 29 as shown in FIG.
As shown in a), it is locked in the locking groove 44, and movement in the disk cartridge insertion direction shown by arrow B in FIG. 3 is prevented.

When the slide plate 2 is in the unloading position, the protrusions 21.22.2 protrude from the side surface 55.56 of the holder 4.
3 are guide grooves 18, 19 formed in the side plates 16, 17 of the frame body 1, as shown in FIGS. 7(a) and 6(a).
．． 20, and is pushed by the surface of the vertical portion Hu of the slide plate 2 on the anti-disk cartridge insertion side Q, and is closest to the disk cartridge insertion opening 46 of the front plate 45, and It is located at the same level as the disk cartridge insertion slot 46.

This position is the standby position of the disc cartridge 3 and also the ejection position of the disc cartridge 3.

At this time, the cam plate 40 also has the protrusion 41 located in the horizontal portion 64u of the cam groove 64, as shown in FIG. 7(a).
The pad 40a portion extends upward from the top plate 54 of the holder 4. Also, naturally, the door 47 of the front plate 45 is as shown in FIG.
), the shutter 48 is located below the disk cartridge insertion opening 46.

When the disk cartridge 3 is inserted into the disk cartridge insertion slot 46 of the front plate 45 from the unloaded state, the disk cartridge 3 advances into the holder 4 without pushing open the door 47, and the eject lever 66 shown in FIG.
is pressed, and the small protrusion 66e comes into contact with the side wall on the opposite side of the notched groove 29f from the position shown in FIG. 5(a) as shown in FIG. 5(b). At this point, the engagement lever 58 shown in FIG.
The engaging portion 58a of the case 31 of the disk cartridge 3
It is engaged with the engagement groove 38 of. Further pressing in the direction of arrow B pushes the operation pin 29a of the lock lever 29 and rotates the lock lever 29 counterclockwise as shown in FIG. 5(b). At this time, the back surface 58b of the engagement pin 58 just comes into contact with the inner surface of the side plate 17 of the frame 1, and the engagement pin 58 and the case 31 cannot be separated, and the holder 4 and the disk cartridge 3 operate in unison. I will do it.

Then, when the eject lever 66 is further pressed,
The small protrusion 66e presses the side wall of the notched groove 29f, and the lock lever 29 is rotated counterclockwise as shown in FIG. 5(C). As a result, the protrusion 29b is removed from the locking groove 44, and the lock is released.

As described above, when the slide plate 2 of the lock lever 29 is unlocked, the slide plate 2 moves in the direction of arrow B in FIG. 3 due to the elastic force of the spring 10, as shown in FIG. 6(a). position, it is automatically introduced to the position shown in FIG. 6(b). In this process, the protrusions 21, 22, 23 of the holder 4
is pushed toward the left in FIGS. 6 and 7 with the upper surface of the disk cartridge insertion side A of the vertical portion Hu of the cam groove 13° 14.15, and the protrusion 21, 22, 23 is pushed into the guide groove 18° 19.
20 in the same direction along the horizontal portions 18a, 19a, and 20a to the position shown in FIG. 6(b).

As a result, the holder 4 and the disk cartridge 3 housed in the holder 4 are also moved to the same position.

Then, the protrusions 21, 22, 23 are in the guide groove 18°19.
．． 20 inclined parts 18 c, 19 c, 20 c
, the vertical portions 18b, 19b, 20 come into contact with the surface on the side Q opposite to the disk cartridge insertion side, and the vertical portions 18b, 19b, 20
Move to b. Then, as shown in FIGS. 6(b) to 6(c), the surface of the disk cartridge insertion side A of the inclined portion S of the cam groove 13, 14, 15 comes into contact with the cam groove 13, 14, 15.
The protrusions 21, 22° 23 are the vertical parts 18b, 19b, 20b
move downwards along. This movement causes the protrusion 21.2
2゜23 is the lower horizontal part Hd of the cam grooves 13, 14.15
When the disc 3 is reached, it stops at the position shown in Fig. 6(C), and the disc 3
0 onto the turntable 8 is performed.

In parallel with this movement, the cam plate 449 also moves into the cam groove 64.
The protrusion 41 descends along the cam groove 64, and when loading is completed, the protrusion 41 reaches the lower horizontal portion 64d of the cam groove 64, and the pad 40a enters into the holder 4 and the disc cartridge 3, and the disc 30 is removed. The position relative to the magnetic head 5 is defined. At this time, the surface of the pad 40a on the bottom la side of the frame 1 contacts the tip of the height adjustment pin 1t, and is positioned at a height of about 50 μm from the end surface of the peripheral edge 5d of the support 5. It is set. This height is
When testing before shipping, load a test disk cartridge and visually check the reproduced image.The optimal position is the closest to the end surface of the support 5, where the image is not distorted.Usually, this height is 50 to 100 mm. Although the thickness is about czm, it functions satisfactorily even with a thickness of about 200 μm. It goes without saying that this suitable height varies depending on the thickness of the disk 30, the degree of flexibility, the diameter of the support plate 5c, etc.

Furthermore, when the holder 4 is lowered from the position (b) to the position (c) in FIG. 6, the case 3 of the disk cartridge 3
1 is in contact with the abutting end 49a of the lever 49 attached to the back surface of the front plate 45,
The corresponding contact end 49a is pushed down, which causes the shutter 48 locked to the other end of the lever 49 to rise and close the disk cartridge insertion opening 46. Therefore, there is almost no possibility that dust will enter through the disk cartridge insertion slot 46 during recording and reproduction of the disk cartridge 3.

As mentioned above, Fig. 6(a), (b), (c)
When the recording and reproduction of the disk 30 of the disk cartridge 3 loaded in the order of FIG. 2, FIG.
From the loading position shown in FIGS. 4, 5(C), 6(C), 7(b) and 8(b), when the eject button on the camera side (not shown) is pressed, the motor 70 rotates and drives a reduction gear group 71. Then, the slide plate 2 is returned to the position shown in FIG. 6(a) via a mechanism not shown. Then, the protrusions 21, 22, 23 of the holder 4 come into contact with the surface of the inclined portion S of the cams 1i13, 24, 15 on the side Q opposite to the disk cartridge insertion side, and the guide grooves 18, 19, 2
It is pushed up along the vertical portions 18b, 19b, and 20b of 0, passes through the position shown in FIG. 6(b), and returns to the position shown in FIG. 6(a). In this process, the lock lever 29 is locked into the locking groove 44 of the slide plate 2 by the elastic force of the spring 65, and the slide plate 2 is moved to the position shown in FIG. 6(a) and FIG. 2, that is, unloaded. Or hold it in the eject complete position,
At almost the same time, the engagement lever 58 is disengaged from the engagement groove 38, and the disk cartridge 3 urges the eject lever 66 by the elastic force of the tension spring 66a, and the shutter 48 is lowered. Open front plate 45
The disk cartridge is ejected from the disk cartridge insertion slot 46 in the direction indicated by the arrow in FIG. 6<a>. During this ejection process, the protrusion 67a of the shutter closing spring 67 engages with a portion of the shutter 34, and the shutter 34 of the disk cartridge 3 is closed.

Further, in connection with the return operation of the slide plate 2, the protrusion 41 of the cam plate 40 rises along the cam groove 64, and the protrusion 2
1, 22, and 23 are the horizontal portions 18a.

19a and 20a, the protrusion 41 reaches the upper horizontal portion 64u, and when the disk cartridge 3 is ejected, the pad 40a is completely retracted from the holder 4.

During recording/reproduction in the SVF apparatus having the above configuration, the disk 30 is placed along the upper surface of the support plate 5c in FIG.
As the air rotates, the air inside the recess 5f is sucked out, the pressure inside the recess 5f becomes lower than the outside air, and the air is sucked into the inner surface of the recess 5f. As a result, the disk 30 is deformed along the curved surface of the magnetic head 5 on the side where the helad gap is formed, and the conditions of contact between the magnetic heads 5a and 5b with respect to the helad gap are the same in all cases. As a result, there is no difference between field images, so the image quality of the frame images does not deteriorate. Therefore, it goes without saying that good image recording/reproduction can be achieved even when a 1-gap field recording magnetic head is used.

Furthermore, since the pad 40a of the cam plate 40 is located at a distance of about 50 μm from the top surface of the support plate 5c during recording and reproduction, it is unrelated to the contact pressure for recording/reproduction, but when the disk 30 is loaded. Sometimes, since the above relationship is always maintained, the instant suction function can be performed even at the beginning of recording/playback.

Furthermore, even if an upward force in the figure is applied to the disk 3o due to an external force during use, since the pad 40a is located close to the top, the presence of air between the disk 30 and the pad 40a will easily prevent the support plate from moving. 5c will not peel off from the top surface.

Therefore, by combining the support plate 5c and the pad 40c, it is possible to provide an SVF device that does not require adjustment and can realize extremely good frame images regardless of the usage condition.

Note that the above embodiments are particularly intended for image information, but
Needless to say, this method can also be applied to data recording other than images.

〔Effect of the invention〕

As described above, according to the present invention, a magnetic head is supported on a support plate having a concave portion, and a regulating plate is provided that faces the magnetic head at a predetermined distance with a magnetic recording medium in between. The magnetic recording medium is attracted by hydrodynamic action to achieve a stable relative relationship with the magnetic head, and the regulating plate prevents the magnetic recording medium from peeling off, so it is necessary to adjust the height position of the regulating plate. Therefore, it is possible to provide a magnetic disk drive device that can realize excellent frame images.

[Brief explanation of drawings]

1 to 11 are SVFs according to embodiments of the present invention.
Figure 1 is a plan view showing the internal structure of the SVF device, Figure 2 is a perspective view showing the overall structure, Figure 3 is a plan view showing the internal drive section, and Figure 4 is a plan view showing the internal structure of the SVF device. The figures are partially sectional plan views, Figures 5 (a), (b), (
c) is an operation explanatory diagram showing the operation of the lock lever and eject lever, respectively, and Figs. 6(a), (b), and (C).
7(a) and 7(b) are operation explanatory diagrams showing the states of the holder and cam plate during loading operation, respectively.
Figures 8(a) and (b) are front views of the SVF device showing the operation of the shutter, Figure 9 is an explanatory diagram showing the states of the support, magnetic head, and regulating plate, and Figure 10 mainly shows the eject lever. Fig. 11 is an enlarged view of main parts mainly showing the lock lever, Fig. 12 is a plan view of the disk cartridge used, and Fig. 13 is an SV according to a conventional example.
It is a sectional view of the main part of F device. 5... Magnetic head, 5C... Support body,
5d...peripheral part, 30...disk,
40...Cam play Figure 1 Figure 3 la Figure 4 Figure 5 IQ) 66b 65 29 44 /7 Figure 6 (b) (b) Figure 8 (a) 49 50494B (b) q :i QC)4948Figure 9Figure 11Figure 72

Claims (1)

[Claims] In a magnetic disk drive device that rotationally drives a disk-shaped magnetic recording medium and records or reproduces information via a magnetic head, a magnetic head support that protrudes and supports the magnetic head within a recess, and a magnetic recording medium are used. 1. A magnetic disk drive device, comprising: a regulating means disposed at a position facing the support body, and regulating a maximum separation position of the magnetic recording medium from the support body.