JPH05128702A - Magnetic recording and reproducing device - Google Patents

Abstract

PURPOSE:To provide a magnetic recording and reproducing device which has a very small spacing loss and improves the contact between a head chip and the magnetic recording face to perform recording/reproducing with an extrahigh density. CONSTITUTION:Both faces of a magnetic floppy disk 1 rotated at a high speed are interposed between stabilizers 7a and 7b supported by elastic bodies like a pair of flat springs 6a and 6b, and thereby, the disk 1 is prevented from running out to stabilize the magnetic recording face. An information signal is magnetically recorded and reproduced in the stable area behind the stabilizer 7a and/or the stabilizer 7b by a head chip 11a and/or a head chip 11b supported on the stabilizer 7a and/or the stabilizer 7b by elastic bodies of less elasticity like a pair of flat springs 15a and/or 15b.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic recording / reproducing apparatus for magnetically recording / reproducing information signals, such as a magnetic floppy disk device (hereinafter referred to as FDD) and an electronic still camera.

[0002]

2. Description of the Related Art An FDD currently in practical use is a magnetic floppy disk which is provided with a pair of so-called flying heads in which one end of a suspension is fixed to an arm connected to an actuator and a magnetic head with a slider is fixed to the other free end. An information signal is recorded on or reproduced from both sides of a disc (hereinafter, simply referred to as a disc) so as to sandwich the disc. Further, there are electronic still cameras that use a negative pressure slider or a pad to interface with the magnetic head and the disk, but in any case, the principle is the same as the FDD currently in practical use. It is the same.

In the FDD, since the magnetic head is pressed from both sides of the disk as described above, the contact between the magnetic head and the disk is always a problem. It does not matter so much when the disk rotates at a low speed of 300 rpm or 600 rpm, but when the disk is rotated at a high speed to record an information signal at an ultra high density such as perpendicular magnetic recording, the disk Of the magnetic head and the disk become worse, and the spacing loss becomes larger, which is very problematic. Therefore, in order to improve the above-mentioned hit, the shape of the slider is devised and the structure for attaching the magnetic head to the slider is devised, but the structure becomes complicated,
Therefore, there are drawbacks such that the processing becomes troublesome and becomes expensive.

[0004]

Therefore, in the present invention, the runout of the disk, which is the basis of the above-mentioned drawbacks, is eliminated and the contact between the magnetic head and the disk is kept good, that is, the spacing loss. Is to reduce as much as possible.

[0005]

Therefore, according to the present invention, a pair of stabilizers supported by a pair of elastic bodies stabilizes a magnetic recording surface by sandwiching a disk rotating at a constant rotation speed or a linear speed from both sides thereof. In the above, the information signal is magnetically recorded or reproduced from the stable area.

[0006]

Therefore, since the runout of the disk is reduced and the contact between the magnetic head and the disk can be maintained well, the spacing loss is almost eliminated and the super high density recording / reproducing can be performed.

[0007]

Embodiments of the present invention will be described below in detail with reference to the drawings. In the embodiment, the FDD is exemplified as the magnetic recording / reproducing device.

FIG. 1 is a side view showing the relationship between the FDD stabilizer and magnetic head of the present invention and a disk, FIG. 2 is a front view of FIG. 1, and FIG. 3 is a stabilizer and magnetic head used in the FDD of the present invention. And FIG. 4 is an exploded view of the magnetic head portion of FIG.

Reference numeral 1 is a disk. The base material of the disk 1 is polyimide or PET having a thickness of about 20 to 60 μm.
And the like, and magnetic recording surfaces 2a and 2b made of magnetic material layers such as barium ferrite, Co-Cr material, and Co-γ material are formed on both surfaces thereof.

Reference numerals 3a and 3b are magnetic head supporting portions.
Since these have the same structure, only the magnetic head support portion 3a will be described with reference to FIGS. 3 and 4. The suffix a is attached to the constituent element of the magnetic head supporting portion 3a arranged on the lower side of the disk 1, and the suffix b is attached to the constituent element of the magnetic head supporting portion 3b arranged on the upper side of the disk 1.

In the central portion of one surface of the mounting base 4a in the shape of a rectangular parallelepiped, two plate springs 6a are formed with a space holding portion 5a having two surfaces held at a predetermined distance and held in parallel with each other. .. The material of the leaf spring 6a was made of stainless steel having a thickness of 100 μm. One end of each of the two leaf springs 6a is adhesively fixed to both surfaces of the gap holding portion 5a, and the other end is inserted and fixed in two support grooves 8a formed on one side surface of the stabilizer 7a. The stabilizer 7a is formed in a cube whose surface facing the magnetic recording surface 2a of the disk 1 is composed of an air bearing slider surface (hereinafter referred to as ABS surface) 9a forming a part of a cylindrical shape.
Two support grooves 10a are also formed on the surface opposite to the surface on which the support groove 8a is formed. The support groove 10a and the support groove 8a are formed at substantially the same height position.

Reference numeral 12a denotes a head base, which is made of a flat plate having a thickness of 100 μm as shown in FIG.
A head chip 11a forming a magnetic head is bonded and fixed to 3a. The head base 12a is supported by two parallel leaf springs 15a. That is, these leaf springs 15a
On the line deviating from each center line X ₁ -X ₂ ,
When the slits 14a are opened in a U shape from the outer ends of the respective heads, the head base 12a is fitted into these slits 14a and fixed by adhesion. The other end of each leaf spring 15a has a support groove 10a provided in the stabilizer 7a.
It is fitted and fixed by adhesion.

The gap surface g of the head chip 11a is, as clearly shown in FIGS. 1 and 2, A of the stabilizer 7a.
It slightly protrudes from the BS surface 9a, which is the disk 1
The spring force generated by the centrifugal force and the spring force (rigidity) of the leaf spring 15a are projected so as to be balanced. In this embodiment, the leaf spring 15a is made of stainless steel with a thickness of about 40 μm, and the leaf spring 15a has a spring force of 0.1.
It was set within a range of up to 0.5 g to make it thinner than the leaf spring 6a to lower the elasticity.

Stabilizer 7a and head chip 11a
As will be described later, the distance between the head chip 11 and the magnetic recording surfaces 2a and 2b is stabilized by the stabilizers 7a and 7b sandwiched from both sides of the disk 1.
Stabilizer 7 at a distance where a and 11b are located
They are arranged on the downstream side of the disks 1 and 7b in the rotation direction of the disk 1.

The two leaf springs 6a and 15a are arranged in parallel so that the gap surface g of the head chip 11a and the ABS surface 9a of the stabilizer 7a are the magnetic recording surface 3a.
This is because the plate springs 6a and the stabilizers 7a have the same width in parallel so as to vertically oppose each other with respect to the magnetic recording surface 3a of the ABS surface 9a of the stabilizer 7a. In either case, the spacing loss can be extremely reduced.

Three lead wires 16 of the head chip 11a
As shown in FIG. 1, a is passed through the tube 17a and connected to the terminal plate 18a.

The magnetic head supporting portion 3a thus supported and configured is turned upside down to form the magnetic head supporting portion 3b shown in FIGS. 1 and 2, and the magnetic head supporting portions 3a and 3b are respectively the carriage 19a. And 19b are fastened to the lower surface and the upper surface at one end with screws 20a and 20b, respectively. 21a is a screw hole (FIG. 3). The carriages 19a and 19b are configured so that they can be opened and closed up and down, but the structure thereof is not an essential point of the present invention and is therefore omitted.
The carriages 19a and 19b may be of swing arm type or linear type, and the other ends thereof are connected to an actuator.

As described with reference to FIG. 4, the head chip 11
Since a is arranged on a line deviating from the center line of the leaf spring 15a, the magnetic head supporting portion 3a is inverted to form the magnetic head supporting portion 3b, and the magnetic head supporting portion 3a is opposed to the magnetic head supporting portion 3a. However, as shown in FIG. 2, the head chip 1
The 1a and the head chip 11b do not collide with each other.

Next, the magnetic head supporting portion 3a having the above structure.
The operation principle of 3 and 3b will be described. In FIG. 3, the disk 1 is assumed to rotate in the direction of arrow Y, for example, 3,600 rpm. Here, the carriages 19a and 19b are shown in a state of being located on the outermost periphery of the disk 1. With the conventional technology, it is impossible to use up to the outermost circumference of the disk 1 as shown in FIG. 3, but in the present invention, the pair of stabilizers 7a and 7b are each a pair of two parallel leaf springs 6.
ABS surfaces 9a and 9b of the stabilizers 7a and 7b supported by a suspension consisting of a and 6b.
Is formed on the cylindrical slider, a negative pressure is generated on the rear side of the cylindrical slider with respect to the rotation direction of the disc 1,
Therefore, the disk 1 tends to be attracted to the ABS surfaces 9a and 9b, and thus the function of stabilizing the surface of the disk 1 works. Without these stabilizers 7a and 7b, the runout of the disk 1 would be 50 to 200 μm, and even if an information signal was recorded / reproduced by the head chips 11a and 11b, it would not hit the disk 1. By the presence and the role of the stabilizers 7a and 7b, the recording and reproducing can be performed on the magnetic recording surface of the disk 1 which is stable. The stabilizers 7a and 7b are about 0.1 μm above the magnetic recording surface.

In such a stable region of the magnetic recording surface, as shown in FIG.
As shown in FIG. 2, the two parallel leaf springs 15a and 15b bend in parallel, and as shown in FIGS. 1 and 2, the head chips 11a and 11b are dimples 22a on the magnetic recording surfaces 2a and 2b of the disk 1, respectively. And 22b will be formed. Therefore, the spacing loss between the head chips 11a and 11b and the magnetic recording surfaces 2a and 2b can be extremely reduced.

FIG. 5 is a schematic side view of the second embodiment of the present invention. The difference from the first embodiment is that
A case has been shown in which a dummy head (or dummy slider) 23 is arranged instead of the head chip 11b, and one side of an information signal is recorded on the magnetic recording surface 2a by the head chip 11a alone.
Even with such a configuration, it is possible to obtain the same operational effect as the FDD of the first embodiment.

FIG. 6 is also a side view schematically showing the third embodiment of the present invention. The difference from the first embodiment is that there is no head chip 11b arranged on the upper side, A case is shown in which an information signal is recorded on one side on the magnetic recording surface 2a as in the second embodiment using only the head chip 11a arranged on the lower side. This embodiment can be actually applied to the single-sided recording system of the electronic still camera. In the FDD of this embodiment, compared to the first and second embodiments, the head chip 11a hits the magnetic recording surface 2a lower and the spacing loss increases slightly, but compared to the hits of the prior art. It goes without saying that it has been dramatically improved.

Further, FIG. 7 is a schematic side view of the fourth embodiment of the present invention. In this embodiment, the stabilizer 7a in the first embodiment is not supported by the two parallel leaf springs 6a, but is supported by the fixed base. The head base 12a provided with the head chip 11a is adhesively fixed to the stabilizer 7a via the parallel leaf springs 15a as in the first embodiment. The structure of the upper magnetic head support portion 3b is similar to that of the first embodiment.

With such a structure, the stabilizer 7a serves as a reference, and the ABS surface 9b of the stabilizer 7b is used.
The disk 1 is pressed against the ABS surface 9a of the stabilizer 7a to stabilize both magnetic recording surfaces 2a and 2b of the disk 1, and the head chip 11a presses the disk 1 in a stable area behind the disk 1 to form a dimple 22b. Since the dimple 22a can be generated in the head chip 11a, both head chips 11a and 11b can be formed.
The familiarity with the disk 1 can be kept good. Further, there is an advantage that compatibility (chucking) of the disc 1 can be easily obtained.

As described above, according to the present invention, the stabilizers 7a and 7b are arranged on both sides of the disc 1, and the runout of the disc is eliminated by the ABS surfaces 9a and 9b of these stabilizers, and the stability thereof is improved. Dimples 22a and / or 22b are formed on the magnetic recording surface by head chips 11a and / or 11b supported by parallel leaf springs 15a and / or 15b provided immediately after at least one of these stabilizers in the recording / reproducing area. However, since the information signal is recorded and reproduced, the contact between the head chip and the disk can be kept extremely good, and the spacing loss can be minimized. Therefore, according to the present invention, ultra-high density magnetic recording / reproducing can be performed. Also, since the contact force between the head chip and the disk is about 0.1 to 0.5 gr, the head chip,
It is possible to extend the life of both the magnetic recording surface.

[Brief description of drawings]

FIG. 1 is a side view showing a relationship between a disk of an FDD stabilizer and a magnetic head of the present invention.

FIG. 2 is a front view of FIG.

FIG. 3 is a perspective view showing a structure of a stabilizer and a magnetic head used in the FDD of the present invention.

FIG. 4 is an exploded view of the magnetic head unit of FIG.

FIG. 5 is a side view schematically showing a second embodiment of the present invention.

FIG. 6 is a side view schematically showing a third embodiment of the present invention.

FIG. 7 is a side view schematically showing a fourth embodiment of the present invention.

[Explanation of symbols]

 1 disk 2a, 2b magnetic recording surface 3a, 3b magnetic head supporting portion 4a, 4b mounting base 5a, 5b spacing holding portion 6a, 6b parallel leaf springs 7a, 7b stabilizer 8a, 8b, 10a, 10b supporting groove 9a, 9b ABS surface 11a, 11b Head chip 12a, 12b Head base 14a Slits 15a, 15b Parallel leaf springs 19a, 19b Carriage 23 Dummy slider (or Dami head) 24 Fixed base

Claims (6)

[Claims] 1. A pair of stabilizers supported by a pair of elastic bodies, a magnetic recording surface is stabilized by sandwiching the magnetic floppy disk from both sides of a rotating magnetic floppy disk, and at least one stabilizer of the pair of stabilizers is elastic. A magnetic recording / reproducing apparatus characterized in that an information signal is magnetically recorded in or reproduced from an information signal in a stable region of the magnetic recording surface by a magnetic head connected in series. 2. A pair of stabilizers supported by a pair of elastic bodies, a magnetic recording surface is stabilized by sandwiching the magnetic floppy disk from both sides of a rotating magnetic floppy disk, and elastically connected to each of the pair of stabilizers. A magnetic recording / reproducing apparatus characterized in that information signals are magnetically recorded on or reproduced from both sides of the magnetic floppy disk in a stable area of the magnetic recording surface by magnetic heads displaced from each other. 3. A pair of stabilizers supported by a pair of elastic bodies for stabilizing the magnetic recording surface by sandwiching the magnetic floppy disk from both sides of a rotating magnetic floppy disk, and elastically applying to one stabilizer of the pair of stabilizers. To a magnetic head, and the other stabilizer is elastically connected to a dami head or a dami slider in a state of being displaced from the position of the magnetic head to magnetically record an information signal in a stable area of the magnetic recording surface, Alternatively, a magnetic recording / reproducing device characterized by reproducing from this. 4. One stabilizer is fixed and the other stabilizer is a pair of interlocking stabilizers supported by an elastic body, and the magnetic recording surface is sandwiched from both sides of a rotating magnetic floppy disk. A magnetic head that is stabilized and elastically connected to at least one of the pair of stabilizers, and magnetically records or reproduces an information signal on both sides of the magnetic floppy disk within a stable region of the magnetic recording surface. And a magnetic recording / reproducing apparatus. 5. The magnetic recording according to claim 1, 2 or 3, wherein a gap surface of the magnetic head slightly protrudes toward the magnetic recording surface side from a surface of the stabilizer facing a magnetic floppy disk. Playback device. 6. The magnetic recording / reproducing apparatus according to claim 1, wherein the pair of stabilizers face each other with the magnetic floppy disk interposed therebetween.