JPH10112005A - Composite magnetic head device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the suitable, compact, light weight and low cost composite magnetic head device which is installed on a floppy disk device that precisely conducts a recording/reproducing of data signals and has an interchangeability between upper and lower specifications. SOLUTION: The device is provided with a first head section 2 which performs a reproducing/recording of the data signals of a disk DL that rotates at a lower speed and a second head section 6 which conducts a data signal reproducing/recording of a disk DU that rotates at a higher speed. In the section 6, the width of a disk sliding surface 7a of a core member 7 is made slightly narrower than the width of a core member 3 of the section 2. A spacer member 9, which is made of a nonmagnetic material, is joined to at least one of the side surfaces of the member 7 of the section 6 so that the width of the section 6 is made equal to the width of the member 3 of the section 2. Note that the sections 2 and 6 are arranged in series with respect to the rotational direction of a disk D.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a data signal, an audio signal or an image signal (hereinafter simply referred to as a data signal, etc.) for a flexible disk-shaped recording medium such as a floppy disk (hereinafter simply referred to as a disk). .), And more specifically, a low-speed magnetic head device for reproducing / recording data signals and the like for a first disk which is rotated at a low speed, and a data signal etc. Recording / recording of data signals for a second disk which is recorded at high density and rotated at high speed
The present invention relates to a composite magnetic head device integrally formed with a high-speed magnetic head device for performing reproduction.

[0002]

2. Description of the Related Art A floppy disk drive has a basic configuration in which a disk is rotated at a relatively low speed and data signals and the like are reproduced / recorded while a disk sliding surface of a magnetic head device is in contact with the disk. It has features such as low price and high reliability. For example, a standard floppy disk drive using a 3.5-inch diameter disk, which has a very high penetration rate, has a storage capacity of 1.44 Mbytes (or 720 Kbytes,
The basic specifications are a data transfer rate of 250 Kb / s (or 500 Kb / s), a disk drive rotation speed of 300 rpm, and the like.

On the other hand, in personal computers and the like, the number of applications and applications have been remarkably expanded by lowering the price and simplifying the operability or enhancing the network network. From the center to multimedia data such as image information data signals and graphics data signals. In order to cope with such a situation, standard equipment of a disk exchange type external storage device is being studied for a personal computer or the like.

[0004] However, the standard type floppy disk device cannot meet such needs because of the above-mentioned features. Therefore, in the floppy disk drive, the data transfer rate is improved by increasing the density of data signals and the like on the disk and rotating the disk at a high speed of several thousand rotations or more to increase the storage capacity to 100 Mbytes or more. Studies are being made on a large capacity device. In the following description,
A magnetic head device provided in a standard type floppy disk device is referred to as a lower specification magnetic head device, and a disk used for the magnetic head device is referred to as a lower specification disk, and a magnetic head device provided in a large-capacity floppy disk device is referred to as a higher specification magnetic head device. The disk used for this is referred to as a higher specification disk.

[0005] For example, the Zip drive system, which has been put into practical use as a higher specification floppy disk device,
A disk having a diameter of 3.7 inches is used, based on specifications such as a disk having a storage capacity of 100 Mbytes for data signals and the like, a disk rotation speed of 2945 rpm, and a sector servo system. The LS-120 drive system, which has been put to practical use as another higher-specification floppy disk drive, uses a 3.5-inch diameter disk.
It is based on specifications such as a storage capacity of a data signal of one disk of 120 Mbytes, a rotation speed of the disk of 720 rpm, and an optical servo system.

The above-mentioned Zip drive type floppy disk device employs a floating magnetic head device similar to a hard disk device in order to rotationally drive a disk at a high speed.
There is a problem that there is no compatibility with a floppy disk device using a lower specification disk having a diameter of 5 inches. Therefore, a main unit such as a personal computer must be provided with two types of floppy disk devices, ie, a higher-order specification and a lower-order specification. was there.

On the other hand, a floppy disk drive of the LS-120 drive system is constructed by integrating a magnetic head device of a higher specification and a magnetic head device of a lower specification, and by setting the rotational speed of the disk to 720 rpm. Similarly, the magnetic head device is configured as a contact type so as to avoid occurrence of malfunction due to floating. However, such LS-120
The drive type floppy disk drive has the problems that the cost is increased because each component constituting the optical system is required by adopting the optical servo method, and the transfer rate of the data signal is not improved.

[0008]

In a high-spec floppy disk device, compatibility with a low-spec disk is indispensable, and it is an object to achieve an improvement in performance by using a high-spec disk in a high-speed manner. ing. For such a floppy disk device, a magnetic head device that can conform to the upper specification and the lower specification and that can reliably reproduce / record data signals and the like is essential.

By the way, in a lower specification magnetic head device, data signals and the like are recorded with a track width somewhat narrower than a track pitch in order to guarantee compatibility of recording data signals and the like between the devices. For this reason, in the lower specification magnetic head device, a read / write gap (hereinafter, referred to as an R / W gap) is formed on the disk sliding surface of the slightly wider core material in consideration of the positional deviation of the disk with respect to the track.
And an erase gap (hereinafter, referred to as an E gap) is provided on the rear side of the R / W gap. In this way, the lower specification magnetic head device guarantees a guard band between data signals without performing tracking servo.

On the other hand, in the upper specification magnetic head device, since a data signal or the like is recorded on the disk at a high density, tracking servo is performed, and no E gap is particularly formed in the core material. Also, in the upper specification magnetic head device, the core material is configured to be narrower than the core material of the lower specification magnetic head device in order to reduce crosstalk between tracks.

Therefore, in a magnetic head device in which the upper specification magnetic head unit and the lower specification magnetic head unit are integrated (hereinafter, referred to as a composite magnetic head device), as described above, these two magnetic units have different configurations. The heads are manufactured independently and combined with each other via a member made of a non-magnetic material. In this case, the composite magnetic head device is configured such that the core materials of the upper specification head portion and the lower specification head portion have different widths, and are arranged in parallel in the rotation direction of the disk. That is common. In addition, the composite magnetic head device also needs a configuration that magnetically shields the upper specification magnetic head unit and the lower specification magnetic head unit in order to reduce crosstalk between them.

[0012] Therefore, in the composite magnetic head device, due to such structural features, the cost is high and the overall size is large. In a composite magnetic head device, when a high-order disk is loaded into a floppy disk device and rotated at a high speed, the airflow generated between the floppy disk device and the main surface of the high-order disk slightly causes the data to float and data. It is also an object to suppress deterioration of reproduction / recording characteristics of signals and the like. Due to such problems, a suitable composite magnetic head device mounted on a floppy disk device having compatibility between the upper specification and the lower specification has not been realized.

Therefore, the present invention is suitable to be mounted on a floppy disk device which is manufactured at a small size, light weight and low cost, and which is compatible with the upper specification and the lower specification enabling accurate reproduction / recording of data signals and the like. It has been proposed for the purpose of providing a composite magnetic head device.

[0014]

A composite magnetic head device according to the present invention which has achieved the above object has a first head for reproducing / recording a data signal for a first disk which is rotated at a low speed. Reproduction of data signals and the like for a second disk which is rotated at a high speed with the width of the disk sliding surface of the core material being smaller than the width of the core material of the first head. / A second head portion for performing recording, and a disk sliding surface which is joined to at least one side surface of a core material of the second head portion to have a width substantially equal to the disk sliding surface of the first head portion. And a slider member that sandwiches and supports the first magnetic head portion and the second magnetic head portion in which the spacer member is integrated. The first head unit and the second head unit are arranged in series with respect to the rotation direction of the disk.

According to the composite magnetic head device according to the present invention having the above-described structure, the spacer member joined to the second head portion allows the second head portion and the first head portion to be disc-shaped. In this case, since the disk sliding surface is made to have the same width and rubs in a stable state, stable reproduction / recording of data signals and the like is achieved. Also, in the composite magnetic head device, since the second head portion itself is configured to be substantially small, the head impedance of the disk on which data signals and the like are recorded at high density and rotated at high speed is reduced. As a result, the reproduction characteristics are improved, and the crosstalk of data signals and the like is suppressed. Further, in the composite magnetic head device, the spacer member
Crosstalk of a data signal or the like between the first head unit and the second head unit is suppressed.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, specific embodiments of the present invention will be described in detail with reference to the drawings. The composite magnetic head device 1 shown as the embodiment has a lower specification disk D.
It is provided in a floppy disk device that enables compatible use of L and a higher specification disk DU (hereinafter, collectively referred to as disk D). The floppy disk device uses a non-tracking servo to control the composite magnetic head device 1 when a lower specification disk DL is loaded.
, And performs a tracking servo when a higher specification disk DU is loaded to perform the composite magnetic head device 1.
Drive.

As shown in FIGS. 1 to 3, the composite magnetic head device 1 comprises a first head unit 2 for lower specification comprising a core material 3, an R / W coil member 4, and an E coil member 5,
A second head portion 6 for higher-level specifications, which includes a core member 7, a coil member 8, and a spacer member 9, and a pair of support members which sandwich and support the first head portion 2 and the second head portion 6. It is composed of each member such as slider members 10 and 11.

The first head 2 reproduces data signals and the like recorded on the lower specification disk DL and records the data signals and the like. The second head unit 6
The data signal and the like recorded on the upper specification disk DU are reproduced and the data signal and the like are recorded. The first head unit 2 and the second head unit 6 are arranged in series with respect to the rotation direction of the disk D as described later. Further, the first head unit 2 is arranged prior to the second head unit 6 in the rotation direction of the disk D.

The first head portion 2 is made of a single crystal ferrite material as a material, and is manufactured through a later-described process.
It is configured as an erase type bulk type head. That is, as shown in FIGS. 1 and 3, the first head portion 2 has a core material 3 made of a thin rectangular ferrite material. The core member 3 is divided into front and rear by a dividing groove 3a with respect to the rotation direction of the disk D, is filled with molten glass and integrated, and its upper surface serves as a disk sliding surface 3b which rubs against the disk D. Be composed.
In the core material 3, the front area divided by the dividing groove 3a is configured as a read / write section, and the rear area magnetically insulated by the glass filled in the dividing groove 3a is defined as an erase section. Be composed.

In the core member 3, a first groove 3c is formed in a read / write portion region, and a second groove 3d is formed in an erase portion. The first groove 3c and the second groove 3d are provided in parallel with each other at a distance in the rotation direction of the disk D, so that the core material 3 has a substantially downward E-shape as a whole. Configure. The first concave groove 3c is provided at a position preceding the second concave groove 3d in the rotation direction of the disk D, and forms the center core 13 with the left uncut central leg, and also forms the front core. The core of the read / write part (hereinafter, referred to as
It is called R / W core. 14). A gap groove penetrating from the disk sliding surface 3b to the first concave groove 3c is formed in the core material 3, and glass is fused into the gap groove to form a gap between the read / write portions (hereinafter referred to as a gap). , R / W gap) 15. Although not described in detail, the read / write coil member 4 is assembled to the R / W core 14 described above.

The second concave groove 3d is formed such that the uncut center leg forms the above-mentioned center core 13 in cooperation with the leg of the first concave groove 3c, and the rear leg is formed. A core 16 (hereinafter, referred to as an E-core) of the erase unit is constituted by these. The core material 3 has a second
A gap (hereinafter, referred to as E gap) 17 of the erased portion is formed by forming a gap groove penetrating through the concave groove 3d and fusing glass into the gap groove. The E gap 17 is located on the rear side of the R / W gap 15 and on both sides in the width direction of the core material 3. Although not described in detail, the erase coil member 5 is assembled to the E core 16.

The first head 2 constructed as described above
Is a lower specification disk DL for floppy disk drive.
Is loaded and driven, the data signal recorded on the disk DL is reproduced or the data signal is recorded on the disk DL by the action of the R / W gap 15, as is well known. The first head section 2 is moved (off-track) in the tracking direction by the action of the E gap 17.
, A guard band between data signals is guaranteed.
Although not shown, the first head portion 2 has a bottom surface side of the core member 3 (a side facing the disk sliding surface 3b).
A magnetic material is joined so as to close the first groove 3c and the second groove 7b, thereby forming a closed loop.

The second head portion 6 is formed by forming a metal film in a gap groove formed in a core material 7 made of a polycrystalline ferrite material by a sputtering method or the like.
It is composed of a so-called metal-in-gap head (MIG head) forming the gap 18 and a spacer member 9 joined to the MIG head. That is, as shown in FIG. 2, the core material 7 constituting the second head portion 6 is a narrow-track disk DU of a higher specification.
Accordingly, a small rectangular ferrite material having a width W2 which is thinner than the width W1 of the core material 3 constituting the first head portion 2 is used as a material. The core member 7 has a disk sliding surface 7a whose upper surface rubs against the recording surface of the disk DU.
Is configured as

The upper end of the core member 7 has a disk sliding surface 7.
A concave groove 7b cut so as to be close to a is provided, whereby the whole is formed to have a substantially downward C-shape. The core member 7 constitutes a center core 19 with the front legs left uncut by the concave grooves 7b, and a read / write core (hereinafter, referred to as an R / W core) 20 with the rear legs. Make up. Further, the core member 7 has a groove 7b from the disk sliding surface 7a.
Is formed, and a metal film is formed on a groove wall of the gap groove, thereby forming the above-described metal-in gap 18. The R / W core 20 includes a read / write coil member 8 whose details are omitted.
Is assembled.

The spacer member 9 is made of a non-magnetic material such as ceramic, and is formed so as to have a substantially L-shape as shown in FIGS. That is, the spacer member 9
Is composed of a base 9a orthogonal to the rotation direction of the disk D, and a side surface 9b protruding from one end of the base 9a in parallel with the rotation direction of the disk D. Spacer member 9
Is such that the overall height is smaller than the height of the core material 7. Further, the entire upper surface of the spacer member 9 is configured as a disk sliding surface 9c.

The length of the base 9a is substantially equal to the width W1 of the core material 3 constituting the first head 2. The length of the side surface portion 9b is made substantially equal to the length of the core member 7 in the front-rear direction, and the width W3 is added to the width W2 of the core 7 as shown in FIG. The width W1 is substantially equal to the width W1 of the core material 3 constituting the head part 2 of the first embodiment.

The spacer member 9 configured as described above
Are assembled by applying the base 9a to the front side surface of the core member 7 and applying the side surface portion 9b to one side surface of the core member 7. In this case, the core member 7 and the spacer member 9
Are joined so that the respective disk sliding surfaces 7a and 9c constitute the same surface.

The core member 7 and the spacer member 9 are integrated with each other by the molten glass 21 filled in the opposing joint surfaces to form the second head portion 6. Accordingly, as shown in FIG. 2, the thickness of the second head 6 is equal to the thickness of the first head 2 as a whole. The second head portion 6 has a space formed at the bottom of the spacer member 9 as shown in FIG.
Acts as an assembling space. Also, the second head portion 6 has a bottom surface side of the core member 7 (disc sliding surface 7a).
The magnetic material is joined to the side (opposite side) to form a closed loop.

The second head unit 6 of the MIG head specification configured as described above has a magnetic flux density improved by the action of the metal film and a metal-in The magnetic flux concentrates on the gap 18. Therefore, the second head unit 6 performs the reproduction / recording operation of the data signal and the like in a more stable state with respect to the higher specification disk DU on which the data signal and the like are recorded at a high density.

Since the second head section 6 includes the narrow core member 7 as described above, the crosstalk due to the influence of the core member 7 on the metal-in gap 18 is suppressed, and the upper specification of the narrow track is adopted. A data signal or the like is accurately reproduced or recorded from the disk DU. In addition, since the second head unit 6 includes the small core material 7, the head impedance is reduced, and the reproduction characteristics of data signals and the like are improved.

The first head 2 and the second head 6 described above are positioned between the opposing rear side of the core member 3 on the first head 2 side and the side of the base 9 a of the spacer member 9. The molten glass 22 is filled and integrally fixed. In this case, the first head portion 2 and the second head portion 6 have the disk sliding surfaces 3b, 7a, 9c of the core material 3, the core material 7, and the spacer member 9 as shown in FIG. They are integrally joined and fixed so as to constitute the same surface. As shown in FIG. 2, the first head unit 2 and the second head unit 6 are arranged in series with each other with the first head unit 2 preceding the rotation direction of the disk D. You.

A first slider member 10 is joined to one side of the first head 2 and the second head 6 integrated as described above, and a second slider is joined to the other side. The slider member 11 is joined to form the composite magnetic head device 1.

The first slider member 10 is formed of, for example, a non-magnetic material such as ceramic having abrasion resistance.
The length dimension is substantially equal to the length dimension of the first head section 2 and the second head section 6. Also, the first slider member 1
0, the joint protrusions 1 are formed over the entire lengthwise direction at the upper edge of the side face of the first head 2 and the second head 6 facing each other.
0a is integrally protruded. First slider member 10
The abutment 10a abuts against the side surfaces of the first head portion 2 and the second head portion 6, and is filled with molten glass between opposed joining surfaces to be integrally joined and fixed. In this case, the first slider member 10 has
b is the same as the disk sliding surface 3b of the first head unit 2 and the disk sliding surfaces 7a and 9c of the second head unit 6, and is joined.

The second slider member 11 is also formed of a non-magnetic material such as a ceramic having wear resistance, and has a length dimension corresponding to that of the first head section 2 and the second head section 6. Is almost equal to Also, the second slider member 11 has a joining projection 11a on the upper edge of the side surface of the first head 2 and the second head 6 opposite to each other over the entire area in the length direction.
Are formed so as to have a substantially 7-shaped cross section by integrally projecting. A concave portion 11c forming a groove is formed in the joint convex portion 11a over the entire region in the length direction. The upper surface of the second slider member 11 constitutes a disk sliding surface 11b.

The second slider member 11 has a joint projection 11
a is opposed to the first slider member 10 and abuts against the other side surfaces of the first head portion 2 and the second head portion 6, and is integrally joined and fixed by the molten glass filled between the opposed side surfaces. You. In this case, the second slider member 11 has a disk sliding surface 11b whose first head portion 2
And each disk sliding surface 3b, 7a, 9 of the second head unit 6
and are integrally joined so as to form the same surface as c.

In the composite magnetic head device 1 configured as described above, each disk sliding surface 3b, 7a, 9
c, 10b, and 11b (hereinafter collectively referred to as disk sliding surfaces) constitute the same surface and are combined. In the composite magnetic head device 1, as shown in FIG. 1, arc-shaped chamfers are applied to the leading edge 23 and the trailing edge 24 in the rotation direction of the disk D on the disk sliding surface side. I have. The rear end side edge portion 24 is configured such that the curvature of the chamfer is sufficiently larger than the curvature of the chamfer of the front end side edge portion 23.

As shown in FIG. 4, in the composite magnetic head device 1 described above, the read / write section and the erase section are manufactured in separate steps, and then these are assembled to form the first head section 2. , The second head section 6 and the steps of joining the first head section 2 and the second head section 6 and then joining the slider members 10 and 11.

That is, in the manufacturing process of the read / write portion of the first head portion 2, a block forming process S-1 for shaping a ferrite material as a material into a predetermined shape is a first process.
The ferrite block material has a size that allows a large number of read / write portions to be cut out. In the second gap groove forming step S-2, the ferrite block material
A gap forming groove having a predetermined depth and constituting the R / W gap 15 is formed over the entire length of one main surface.

In the third glass fusing step S-3, glass is fused to the ferrite block material in the gap forming grooves formed in the previous step. In the fourth side grinding step S-4, both side surfaces of the ferrite block material are finished with a predetermined shape and surface accuracy. On one side,
The disk D constitutes a tip side surface in the rotation direction, and its edge portion is chamfered in an arc shape. Also, the other side
Constructs a joint surface with the erase section.

The manufacturing process of the erase portion of the first head portion 2 is the same as the manufacturing process of the read / write portion described above.
The blocking step S-5 of shaping the ferrite material into a predetermined shape is defined as a first step. The ferrite block material has a size that allows a large number of erased portions to be cut out. In the ferrite block material, in the second gap groove forming step S-6, a gap forming groove having a predetermined depth and constituting the E gap 17 is formed over the entire length of one main surface.

In the third glass fusion step S-7, glass is fused to the ferrite block material in the gap forming grooves formed in the previous step. In the fourth side grinding step S-8, both side surfaces of the ferrite block material are finished with a predetermined shape and surface accuracy. On one side,
An edge of the disk D in the rotational direction is formed, and an edge portion thereof is chamfered in an arc shape having a slightly large curvature. Further, the other side surface forms a joint surface with the read / write portion.

The two ferrite block materials manufactured through the above-described steps are joined together by molten glass with their joining surfaces facing each other in a joining step S-9 to form a joined ferrite block material. Note that this joint corresponds to the above-described dividing groove 3a of the first head 2. In the joining grooved ferrite block material, in the next groove forming step S-10, a pair of mutually parallel grooves forming the first groove 3c and the second groove 3d extends over the entire length of the other main surface. Formed. These concave grooves are formed with a depth such that the above-described gap forming grooves face the bottom. The joined ferrite block material is cut to a predetermined thickness in the chip cutting step S-11 to produce a large number of core materials 3 constituting the first head portion 2.

In the manufacturing process of the first head portion 2 described above, the read / write portion and the erase portion are manufactured from different ferrite materials, and these are joined in a bonding step S-9.
However, it goes without saying that it may be manufactured from one ferrite material. In this case, the ferrite material is cut after forming gap forming grooves and concave grooves in regions corresponding to the read / write portion and the erase portion, respectively, and these are integrated again by molten glass.

The manufacturing process of the second head portion 2 includes a blocking process S- in which the ferrite material is shaped into a predetermined shape.
Step 12 is a first step. The ferrite block material has such a size that a large number of second head portions 2 can be cut out. In the ferrite block material, in the second gap groove forming step S-13, a gap constituting groove having a predetermined depth and constituting the metal-in gap 18 is formed over the entire length of one main surface. In the ferrite block material, a metal film is formed in the gap forming groove formed in the previous step in the third metal sputtering step S-14. Further, in the fourth glass fusing step S-15, glass is fused to the ferrite block material in the gap forming groove in which the metal film is formed.

In the ferrite block material, in the fifth groove forming step S-16, the groove 7b has a depth over the entire length of the other main surface so that the above-mentioned gap forming groove can face the bottom thereof. Is formed. In the sixth side grinding step S-8, both side surfaces of the ferrite block material are finished with a predetermined shape and surface accuracy. One side surface forms a joint surface with the spacer member 9. Further, the other side surface constitutes a rear end side surface in the rotation direction of the disk D, and an arc-shaped chamfer having a large curvature is applied to an edge portion thereof.

The ferrite block material is cut to a predetermined thickness in a seventh chip cutting step S-18 to produce a large number of core materials 7 constituting the first head portion 2. The spacer members 9 are joined to these core members 7 in an eighth spacer joining step S-19. That is, the spacer member 9 having an L-shaped cross section is abutted on the core material 7 across the front end side surface and the one side surface of the disk D, and is integrally joined by the molten glass, whereby the second head portion 6 is formed. Be composed.

In the joining step S-20, the first head portion 2 and the second head portion 6 manufactured through the above steps are combined with the side surface on the erase portion side of the first head portion 2 and the second side. Base part 9a of the spacer member 9 constituting the head part 6 of FIG.
Are joined to each other and joined together by molten glass to form a composite head member. Therefore, in this composite head member, the first head part 2 and the second head part 6 are integrated in series. In the slider joining step S-21, the first slider member 10 is integrally joined to the composite head member on one side along the rotation direction of the disk D by molten glass, and the second slider is attached to the other side. The member 11 is joined.

In the sliding surface finishing step S-22, a highly accurate disk sliding surface having no steps is formed on the composite head member. Although not shown, the composite head member manufactured through the above steps is subjected to a coil member assembling step and a magnetic material joining step to manufacture the composite magnetic head device 1. That is, the composite head member has the first
The R / W coil member 4 is attached to the R / W core 14 on the side of the head 2.
And the E coil member 1 is attached to the E core 16.
6 is assembled. Also, the composite head member has a second
The coil member 8 is attached to the R / W core 20 on the side of the head 6. A magnetic material for forming a closed loop is joined to the bottom surfaces of the core members 3 and 7 in the composite head member.

As shown in FIG. 5, the pair of composite magnetic head devices 1a and 1b manufactured through the above steps are vertically opposed to each other with the disk D interposed therebetween via a head support mechanism (not shown). To be mounted on a floppy disk drive. In this case, these composite magnetic head devices 1
a and 1b are supported by the head support mechanism in a state where the composite heads are shifted from each other by several tracks. As for the head support mechanism, various mechanisms employed in the floppy disk drive, for example, a double-sided movable support mechanism for supporting the upper and lower composite magnetic head devices 1a and 1b in a movable state, and for example, the upper composite magnetic head device 1a And a one-sided movable support mechanism which supports the lower composite magnetic head device 1b in a fixed state.

For example, in the composite magnetic head device 1a of the one-side movable support mechanism, when a lower specification disk DL is loaded into a floppy disk device and driven to rotate, the disk sliding surface is changed by the head support mechanism to the lower specification disk DL. Is maintained in contact with the main surface of the. In this state, the composite magnetic head device 1 a
The data signal or the like recorded in L is reproduced or the data signal or the like is recorded.

On the other hand, in the floppy disk drive, when the upper specification disk DU is loaded, it is rotated at a high speed, so that the disk sliding surface of the composite magnetic head device 1a and the higher specification disk DU are connected. Airflow is generated in As shown in FIG. 5, the composite magnetic head device 1a floats in a state where the tip end is slightly elevated and tilted by this air flow. In the composite magnetic head device 1a, as described above, the second head unit 6 is disposed on the rear side with respect to the rotation direction of the upper specification disk DU, so that the second head unit 6 with respect to the main surface of the disk DU. The flying height is reduced. Therefore, the composite magnetic head device 1a reproduces the data signal or the like recorded on the upper specification disk DU or records the data signal or the like with high accuracy by the second head unit 6 having the high magnetic property.

In the composite magnetic head device 1a, as described above, the front edge portion 23 and the rear edge portion 24 on the disk sliding surface side are subjected to arc-shaped chamfering, so that
The edge portion 23 and the edge portion 24 do not damage the main surface of the disk D when the disk D moves toward and away from the main surface along with the rotation operation of the disk D. Further, the composite magnetic head device 1a increases the curvature of the chamfer of the rear end side edge portion 24, so that even when the upper specification disk DU is loaded and the contacting / separating operation is performed with a large amount of operation, the composite magnetic head device 1a performs this operation. Damage to the main surface of the upper specification disk DU is suppressed.

The above-described composite magnetic head device 1 is a junction type composite magnetic head device in which slider members 10 and 11 are integrally joined to both side surfaces of the composite head portion, respectively. The present invention is not limited to the composite magnetic head device described above, but is also applicable to an embedded composite magnetic head device 30 in which a composite head portion 31 is embedded in a slider member 32 as shown in FIG. In the following description of the embedded type composite magnetic head device 30, the same reference numerals are given to members and portions that are the same as or correspond to those of the above-described junction type composite magnetic head device 1, and the description thereof is omitted.

The composite magnetic head device 30 includes a first head unit 2 for reproducing and recording data signals and the like recorded on the lower specification disk DL as in the composite magnetic head device 1 described above, and a higher specification disk. A composite head section 31 is formed by integrating a second head section 33 for reproducing and recording a data signal or the like recorded for a DU. The composite head unit 31 is arranged such that the second head unit 33 is located rearward of the first head unit 2 with respect to the rotation direction of the disk D. The first head unit 2 is a first head unit 2 of the composite magnetic head device 1.
And a tunnel erase-type bulk type head in which an R / W gap 15 and an E gap 17 are formed adjacent to each other in the core material 3.

The second head section 33 is formed by joining a pair of spacer members 34 and 35 described later to the core member 7. The second head portion 33 is formed by forming a gap forming groove in the core material 7 made of a polycrystalline ferrite material and forming a metal film on a groove wall of the gap forming groove by a sputtering method or the like. A so-called metal-in-gap head portion (MIG head portion) that forms the gap 18 is formed. The core member 7 has a small width W2 with respect to the width W1 of the core 3 constituting the first head portion 2 corresponding to the upper specification disk DU having a narrow track. The material is rectangular ferrite. The upper surface of the core material 7 has a higher specification disk DU.
Is formed as a disk sliding surface 7a for rubbing the recording surface.

The first spacer member 34 is made of a non-magnetic material such as ceramic, and is formed in a block shape having a width substantially equal to the width W 1 of the core material 3 constituting the first head 2. Have been. Since the first spacer member 34 has a height dimension smaller than the height dimension of the core member 7, the first spacer member 34 forms an installation space for a coil member 8 (not shown) to be assembled to the core member 7 at the bottom thereof. doing. The upper surface of the first spacer member 34 is configured as a disk sliding surface 34a.

The second spacer member 35 is also made of a non-magnetic material such as ceramic, and is formed in a block shape having a length substantially equal to the length of the core material 7. When the second spacer member 35 is joined to the core member 7, the width of the second head portion 33 is reduced in cooperation with the core member 7 to reduce the width of the core member 3 constituting the first head portion 2. Has a width substantially equal to the width dimension W1. Also,
The second spacer member 35 has a height dimension smaller than the height dimension of the core member 7, thereby forming an assembling space for a coil member 8 (not shown) to be assembled to the core member 7 at the bottom thereof. ing. Further, the second spacer member 35
Has an upper surface formed as a disk sliding surface 35a.

The first spacer member 34 is applied to the front side surface of the core member 7 and assembled. Further, the second spacer member 35 is applied to one side surface of the core member 7 and is combined therewith. In this case, the core member 7 and the first spacer member 34 and the second spacer member 35 have their respective disk sliding surfaces 7a, 34a, 35a (disk sliding surfaces) constituting the same plane. Combined with each other. The core member 7 and the first spacer member 34 and the second spacer member 35 are integrated by the molten glass filling the opposing joint surfaces to form the second head 3
Constituting No. 3. Therefore, as shown in FIG. 6, the second head section 33 is configured such that its overall width is equal to the width W1 of the first head section 2.

The second head unit 3 configured as described above
3 is combined with the one side surface of the first spacer member 34 applied to the rear side surface of the first head portion 2 opposed thereto. The first head portion 2 and the second head portion 33 are integrated by filling the opposing joint surfaces with molten glass to form a composite head portion 31. In this case, the composite head section 31 includes the first head section 2 and the second head section 3.
3 are combined with each other such that the respective disk sliding surfaces constitute the same surface.

The slider member 32 is formed of a non-magnetic material such as abrasion-resistant ceramic or the like and has a rectangular block shape as a whole.
a. As shown in FIG. 6, the slider member 32 has a pair of horizontally long rectangular head mounting spaces 32b and 32c sufficient to mount the integrated first head 2 and second head 33. Have been. These head assembling spaces 32b and 32c are formed in parallel with each other in the width direction while being shifted by several tracks.

The slider member 32 has arc-shaped chamfers 32d and 32e formed in the longitudinal direction, that is, on the front side edge and the rear side edge in the rotation direction of the disk D, respectively. The rear chamfered portion 32e is formed to have a larger curvature than the front chamfered portion 32d. In the slider member 32, head assembly spaces 32b, 32c
Is combined with the composite head 31 described above. In this case, the composite head portion 31 is combined with the one head assembly space portion 32b of the slider member 32 such that the disk sliding surfaces thereof are buried with each other so as to form the same surface, and the composite magnetic head 31 is combined. The device 30 is configured.

In the composite magnetic head device 30 shown as the second embodiment, a pair of spacer members 34 and 35 are joined to the second head portion 6, but the composite magnetic head device 30 described above is used. Of course, this may be constituted by a substantially L-shaped spacer member 9 provided in the head device 1. In other words, the shape of the spacer member is arbitrary, and at least the first head portion 2 and the second
Any member may be used as long as it has the same width as that of the head portion 6. For example, the spacer member 9 is configured such that the first head unit 2 and the second head unit 6 are maintained at a sufficient distance in the rotation direction of the disk D and do not magnetically affect each other. In such a case, a portion for magnetically shielding them is not required.

[0063]

As described above in detail, according to the composite magnetic head device of the present invention, the first magnetic disk for reproducing / recording a data signal or the like for a lower specification disk driven to rotate at a low speed. Since the head unit and the second magnetic head unit that reproduces / records data signals and the like for a higher specification disk that is driven to rotate at a high speed are integrated, the size of the magnetic head device is reduced and the structure is simplified. And the cost is thereby reduced. Further, in the composite magnetic head device, the magnetic head portion for the upper specification, which is miniaturized and accurately reproduces / records data signals and the like, has the same width as the magnetic head portion for the lower specification via a spacer member, and the disk has a smaller size. Since the discs are arranged in series with respect to the rotation direction, accurate reproduction / recording of data signals and the like is performed on the lower specification disc and the higher specification disc.

[Brief description of the drawings]

FIG. 1A-A of a composite magnetic head device according to the present invention;
It is the principal part longitudinal cross-sectional view cut | disconnected along the line.

FIG. 2 is a plan view of the composite magnetic head device.

FIG. 3 is an exploded perspective view of a main part of the composite magnetic head device.

FIG. 4 is a block diagram illustrating a manufacturing process of the composite magnetic head device.

FIG. 5 is an explanatory diagram of an operation state of the composite magnetic head device.

FIG. 6 is a plan view of another composite magnetic head device according to the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Composite magnetic head device, 2 1st head part, 3 core members, 6 2nd head part, 7 core members, 9 spacer members, 10 and 11 slider members, 15R / W gap, 17E gap, 18 metal-in・ Gap, 23 front edge, 24 rear edge, 3
0 Composite magnetic head device, 31 Composite head unit, 32
Slider member, 33 second head section, 34 first spacer member, 35 second spacer member

Claims (4)

[Claims] 1. A first head section for reproducing / recording a data signal or the like for a first disk which is driven to rotate at a low speed, and wherein the width dimension of a disk sliding surface of a core material is equal to that of the first disk. For reproducing / reproducing data signals and the like for a second disk which is smaller in width than the width of the core material of the head portion and is driven to rotate at a high speed
A second head portion for performing recording, and a disk sliding surface which is joined to at least one side surface of a core material of the second head portion to have a width substantially equal to that of the disk sliding surface of the first head portion. A spacer member made of a non-magnetic material, and a slider member sandwiching and supporting the first magnetic head portion and a second magnetic head portion integrated with the spacer member, wherein the first head A composite magnetic head device, wherein the unit and the second head unit are arranged in series with respect to the rotation direction of the disk. 2. The composite magnetic head device according to claim 1, wherein the first head section is disposed at a position preceding the second head section in a rotation direction of the disk. . 3. An at least one disk sliding surface is provided with arc-shaped chamfers at both side edges in the rotation direction of the disk, and a rear side edge is formed with respect to a leading side edge chamfer. 2. The composite magnetic head device according to claim 1, wherein the chamfer of the portion is formed with a large curvature. 4. The first head unit is operated in a state where tracking servo is not performed on the first disk, and the second head unit is configured to perform tracking servo on the second disk. 2. The composite magnetic head device according to claim 1, wherein the composite magnetic head device is operated by being operated.