JPH11149614A - Magnetic head device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To smoothly wind a wire by forming an end surface in the middle part of a winding wire guide groove to be a slope inclined with respect to a second magnetic head element. SOLUTION: Guide grooves are formed in an element slider 3 and a center slider 4, and the winding wire groove of an upper head 2 is exposed. The element slider 3 is provided with a rectangular guide groove 10 formed on the full width in the position of the winding wire groove 8 of the upper head 2, and the center slider 4 is provided with a guide groove 11 formed up to the middle part of a width direction so as to be communicated therewith. Thus, a winding wire guide groove composed of the guide grooves 10 and 11 is formed up to the middle part of the width direction of a magnetic head device. The wall surface 11a of the guide groove 11 of the center slider 4 is formed to be a slope. Since the wall surface 11a is slope-shaped, the tip of a wire 12 is moved along the slope and pulled out quickly from the guide groove 11. Thus, the wire 12 is smoothly pulled out.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic head device for recording and reproducing data on and from a magnetic recording medium, and more particularly to a magnetic head device in which two magnetic head elements having different recording densities are combined and integrated. is there.

[0002]

2. Description of the Related Art In the field of magnetic recording, high-density recording is progressing rapidly, and so-called flexible disks have a large capacity of, for example, 100 MB or more, instead of the conventional recording capacity of about 1 MB or 2 MB. Is being developed.

[0003] Accordingly, the recording / reproducing apparatus is also required to respond to the improvement, and the magnetic head used for recording / reproducing is required to develop a narrow track width magnetic head for high density recording.

A major obstacle in developing a recording / reproducing apparatus using such a large-capacity disc is a problem of compatibility. For example, a magnetic head capable of recording and reproducing data on a flexible disk of about 1 MB and 2 MB (hereinafter referred to as a lower head) cannot record and reproduce data on a large-capacity disk. vice versa,
In a high-density recording narrow track width magnetic head (hereinafter, referred to as an upper head) corresponding to a large-capacity disk, the track width is too narrow to perform sufficient recording / reproducing on an ordinary flexible disk.

Therefore, if both the upper head and the lower head are incorporated in one recording / reproducing apparatus, good recording / reproducing can be performed with respect to any disc, and compatibility can be ensured.

In this case, a composite magnetic head incorporating these two magnetic heads is required, and various studies have been made on a head structure which can be manufactured easily and accurately.

[0007] Under such circumstances, for example, a composite magnetic head in which an upper head is embedded in a slider made of a non-magnetic material, a lower head chip is bonded to and integrated with a slider via a center slider, and a side slider is further bonded. Has been proposed. In this composite magnetic head, recording and reproduction are performed by a lower head in a contact state with a normal flexible disk, and recording and reproduction is performed by an upper head in a floating state with a large-capacity disk, like a so-called hard disk. Done.

The composite magnetic head of this structure can be easily manufactured by separately manufacturing the individual magnetic head elements, combining them and bonding them with a glass for bonding, and the positional accuracy at this time can be improved. Accuracy of the gap position and depth can also be ensured.

[0009]

However, such a composite magnetic head in which two magnetic head elements are combined has a serious problem that winding is difficult.

For example, if there is one magnetic head element,
If a through groove is formed in the slider and the winding groove of the magnetic head element faces the slider, winding can be performed relatively easily after assembly.

On the other hand, when two magnetic head elements are arranged in parallel, the other magnetic head element cannot be formed so as to penetrate the groove for winding because of the presence of the other magnetic head element. Must be stopped by the department.

For this reason, when the end surface of the groove is perpendicularly opposed to the winding groove of the magnetic head element, and the winding is to be performed, the wire material hits the end surface and bends in an unexpected direction. It is difficult to withdraw from.

In particular, the winding groove width of the upper head is, for example, 0.1.
The wire is very small, about 3 mm, and the wire for the winding is very thin, for example, about 60 μm in diameter. Therefore, the winding is made more difficult. .

In view of the above, the present invention has been proposed in view of the above-mentioned conventional circumstances, and it is possible to smoothly pull out a wire at the time of winding, thereby achieving high productivity and reducing manufacturing costs. It is an object to provide a possible magnetic head device.

[0015]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a first magnetic head element for recording and / or reproducing at a first recording density and a coil for winding a coil. A second magnetic head element that has a winding groove and performs recording and / or reproduction at a recording density higher than the first recording density; and the first magnetic head element and the second magnetic head element Are arranged substantially in parallel with each other and are integrated with the slider member. In the magnetic head device, the slider member is provided at a position corresponding to the winding groove of the second magnetic head element in the middle of the magnetic head element arrangement direction. The winding guide groove is formed, and the terminal surface of the winding guide groove at the intermediate portion is an inclined surface inclined with respect to the second magnetic head element.

In the magnetic head device according to the present invention, when a wire for winding is inserted into the winding groove of the second magnetic head element, its tip comes into contact with the terminal surface of the winding guide groove.

At this time, since the end surface is an inclined surface, the leading end of the wire moves along the inclined surface and is guided outward. As described above, the wire rod coming out of the winding guide groove is inserted again into the winding groove, and this operation is repeated, whereby the winding is easily performed.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The structure of a magnetic head device to which the present invention is applied and a method of manufacturing the same will be described in detail with reference to the drawings.

FIG. 1 shows an example of a magnetic head device to which the present invention is applied. This magnetic head device is 1M
B: A magnetic head (lower head) 1 for performing recording and reproduction on a flexible disk with a normal recording density of about 2 MB, and recording and reproduction on a large-capacity flexible disk with a higher recording density Magnetic heads (upper heads) 2 are arranged in parallel, and the contact with the flexible disk is improved.
Alternatively, it is integrated with a slider member for realizing a good flying state.

In this embodiment, the element slider 3, the center slider 4, and the lower head 1, in which the upper head 2 is embedded,
A four-chip structure including the side sliders 5 is employed, and these are joined and integrated to form a composite magnetic head device.

The lower head 1 is formed by subjecting a bulk material such as ferrite to predetermined groove processing or the like and forming a magnetic gap by glass fusion.
Includes a recording magnetic gap g ₁ for reproduction, a pair of erase gaps g ₂ for the both side edges of the recording track written by the magnetic gap g ₁ erases a constant width to form a guard band of the recording reproducing , and a g _3, a so-called tunnel erase head.

The lower head 1 has substantially the same length as the element slider 3, the center slider 4 and the side slider 5 in the direction of travel of the flexible disk (the direction of the arrow X in the figure). Magnetic gap g
₁ and the erasing gaps g ₂ and g ₃ are arranged near the center in the running direction so that a good contact state is easily obtained when the flexible disk comes into contact.

The element slider 3, the center slider 4, and the side slider 5 are integrated with each other.
Only the front core portion having each of the above magnetic gaps forms a closed magnetic circuit by abutting and joining a back core portion described later to the back side. The lower head 1
Is carried out by inserting a coil bobbin into the leg of the back core.

On the other hand, the upper head 2 performs recording / reproducing with a recording density much higher than that of the lower head 1 on a large capacity flexible disk. A high-performance magnetic head such as a MIG (metal-in-gap) head using a metal magnetic thin film having a high density for a part of the core is used.

The upper head 2 has a track width of the magnetic gap g smaller than that of the lower head 1 and a chip size significantly smaller than that of the lower head 1. Therefore, the upper head 2 is handled while being embedded in the element slider 3.

At this time, since the upper head 2 operates as a floating head, a slit groove 6 is provided at the rear end side of the element slider 3 in the traveling direction of the flexible disk, and is fixed by fusion glass 7 therein. I do. By disposing the upper head 2 at the rear end side in the traveling direction of the flexible disk, the magnetic gap g can be brought closer to the surface of the flexible disk when the flying posture is inclined.

The upper head 2 is connected to the lower head 1
Instead of the magnetic head of the type in which the back core is joined, a closed magnetic path is formed only by the portion embedded in the element slider 3, and has a winding groove 8 for winding a coil.

The element slider 3, the center slider 4, the lower head 1, and the side slider 5 in which the upper head 2 is embedded are bonded and integrated by glass bonding. In this example, both side surfaces of the center slider 4 (the surface joined to the element slider 3 and the surface joined to the lower head 1),
A wide shallow groove is formed on one side surface (the surface to be joined to the lower head 1) of the side slider 5, and the glass is joined by the joining glass 9 filled therein.

As a result, the surface facing the flexible disk is formed with a predetermined area. In this example, the facing surface is railed to enable operation as a floating head.

[0030] That is, the element for the slider 3, the magnetic gap g of the upper head 2 rail L ₁ with a predetermined height so as to be positioned at the center is formed, also facing surface of the lower head 1 itself is given there is a rail L ₂ with the height. Therefore, the area between these rails L ₁ and L ₂ becomes a shallow groove, and when the flexible disk runs, air flows into this groove to generate buoyancy.

In the magnetic head device having the above structure, the element slider 3, the center slider 4, the lower head 1, and the side slider 5 must be joined and integrated, and then the winding must be applied to the winding groove 8 of the upper head 2. .

Therefore, a winding guide groove is formed in the element slider 3 and the center slider 4 so that the winding groove 8 of the upper head 2 is exposed to enable winding.

At this time, since there is the lower head 1, it is impossible to form the winding guide groove through the lower head 1 over the entire width of the magnetic head device.

Therefore, in this example, the rectangular guide groove 1 is formed on the element slider 3 at the position of the winding groove 8 of the upper head 2.
0 is formed over the entire width, and a guide groove 11 communicating with the center slider 4 is formed up to an intermediate portion in the width direction. Therefore, these guide grooves 10 and guide grooves 11
Is formed up to the middle part in the width direction of the magnetic head device.

When the winding guide groove is formed up to such an intermediate portion, the end surface thereof, here the center slider 4
The wall surface 11a of the guide groove 11 formed on the upper head 2
When the wire is inserted and the coil is wound as shown in FIG.
There is a risk that the battery 1a may be perpendicularly struck and bend in an unexpected direction.

Therefore, in the present embodiment, the wall surface 11a of the guide groove 11 of the center slider 4 is formed as an inclined surface to eliminate such inconvenience. If the wall surface 11a is an inclined surface, the tip of the wire rod 12 moves along the inclined surface,
It immediately comes out of the guide groove 11. Therefore, the wire 12 can be smoothly pulled out, and the winding operation can be easily performed.

The inclination angle α of the wall surface 11a is arbitrary. However, if the inclination angle α is too large, it becomes closer to a right angle with respect to the insertion direction of the wire rod 12, so that it is difficult to smoothly pull out the wire rod 12. Conversely, if the inclination angle α is too small, it is necessary to increase the distance of the guide groove 11 in the width direction of the center slider 4, and the guide groove 11 may not be able to be accommodated in the center slider 4. Therefore, the inclination angle α is preferably set to 30 ° to 60 °. Further, the wall surface 11a may be an arc-shaped surface having a predetermined curvature instead of a simple inclined surface.

Although the structural example of the magnetic head device according to the present invention has been described above, various modifications can be made to the structure of the magnetic head device.

For example, in the above-described magnetic head device, a four-piece structure of the element slider 3, the center slider 4, the lower head 1, and the side slider 5 is adopted, but the side slider 5 is omitted as shown in FIG. A three-piece structure is also possible. In the case of a three-piece structure,
As shown in FIG. 4, it is possible to reduce the size of the magnetic head device by shaving off the portion outside the element slider 3 (the portion corresponding to the side slider).

Alternatively, as shown in FIG. 5, a two-piece structure including only the element slider 3 in which the upper head 2 is embedded and the lower head 1 can be adopted.

In this case, it is necessary to extend the portion 3a of the element slider 3 on the lower head 1 side so that the element slider 3 has a function as a center slider.

Although the winding guide groove is constituted only by the guide groove 10 of the element slider 3, the end surface 10a of the guide groove 10 must also be an inclined surface.

Next, a method of manufacturing the magnetic head device shown in FIG. 1 will be described.

In order to manufacture the above-described magnetic head device having a four-piece structure, it is necessary to manufacture each piece, that is, the element slider 3, the center slider 4, the lower head 1, and the side slider 5 to which the upper head 2 is attached. is there.

The element slider 3 is, as shown in FIG.
The nonmagnetic material is cut into a rectangular parallelepiped shape, and a slit groove 6 is formed at the rear end side in the traveling direction of the flexible disk. The upper head 2 is inserted into the slit groove 6 and is fixed by fusion glass 7.

A rectangular guide groove 10 is provided on the rear end face of the element slider 3 at right angles to the slit groove 6. The guide groove 10 has such a size that the guide groove 8 of the upper head 2 faces the outside, and is formed over the entire width of the element slider 3.

As shown in FIG. 7, the center slider 4 is also formed by cutting out a nonmagnetic material into a rectangular parallelepiped shape, and forming a guide groove 11 connected to the guide groove 10 of the element slider 3 at an oblique angle. Therefore, the wall surface 11a of the guide groove 11 becomes an inclined surface.

At this time, the depth dimension D of the guide groove 11
Is preferably set to be equal to or slightly larger than the depth dimension d of the guide groove 10 formed in the element slider 3. If the depth dimension D of the guide groove 11 is smaller than the depth dimension d of the guide groove 10,
A part of the side surface 4a of the center slider 4 faces the guide groove 10, and there is a possibility that the wire rod may strike the right angle.

Further, shallow grooves are formed on both side surfaces of the center slider 4, and the bonding glass 9 is filled therein.

The lower head 1 constitutes one chip by itself. As shown in FIG. 8, it is manufactured in the same manner as a normal flexible disk head by processing a ferrite material or the like.

In this example, the magnetic core 1a and the magnetic core 1b
Magnetic gap for erasing by the configured recording and reproducing head having a magnetic gap g ₁ for recording and reproduction by bonding via a gap material, bonded via a gap material and a magnetic core 1c and the magnetic core 1d Erase heads having g ₂ and g ₃ are formed, and these are joined and integrated via a nonmagnetic material 1e to form a tunnel erase head.

The side slider 5 is, as shown in FIG.
It is manufactured by cutting a non-magnetic material into a rectangular parallelepiped shape having a predetermined thickness. A shallow groove is formed in a joint surface 5 a with the lower head 1, and the joint glass 9 is filled therein.

The element slider 3 manufactured as described above,
Center slider 4, Lower head 1, Side slider 5
Are arranged in parallel as shown in FIG. 10, and these are joined and integrated as shown in FIG.

The joining and unifying is performed by melting and cooling and solidifying the joining glass 9 previously filled on both sides of the center slider 4 and the joining surface 5a of the side slider 5.

Finally, as shown in FIG. 12, rail processing is performed on the surface facing the flexible disk to form rails L ₁ and L ₂ corresponding to the upper head 2 and the lower head 1, thereby completing the magnetic head device. .

In the magnetic head device manufactured as described above, the back core constituting the closed magnetic path of the lower head 1 is joined to the back side and attached to the support arm via a gimbal. Hereinafter, the structure of the back core portion and the structure of attaching the back core to the support arm will be described.

As shown in FIG. 13, the back core is formed on a base 13 made of a magnetic material and formed in a substantially U-shape, and leg portions 14a, 14b, 1 of approximately the same height are provided.
4c, 14d, and 14e are erected.
c, 14e It has a structure which has the coil bobbin 15 attached to 14e. In this back core portion, at least portions other than the leg portions 14a and 14b are formed of a magnetic material.

The coil bobbin 15 has an L-shape, and has a cylindrical portion 17 in which a pair of flanges 16 are formed vertically. And this coil bobbin 15
Is formed such that the shape of the inner peripheral surface of the cylindrical portion 17 is substantially the same as the shape of the outer peripheral surface of the leg portions 14c, 14e, and thus can be attached to the leg portions 14c, 14e, respectively. The coil bobbin 15 is attached to the legs 14c and 14e in a state where the coil 18 is formed on the cylindrical portion 17.

When attaching the back core, the leg 1
4a and 14b are brought into contact with the vicinity of both corners of the element slider 3 in which the upper head 2 is embedded. Legs 14c, 1
4d and 14e are abutted so that the lower head 1 is magnetically connected. Specifically, the back core is attached to the magnetic head device via the gimbal 20, as shown in FIG. That is, the magnetic head device is a gimbal 2
The back core portion is attached to a portion facing the opening formed in the gimbal 20 while being placed on one surface of the gimbal 20.

The outer periphery 20 A of the gimbal 20 on which the magnetic head device is mounted is attached to the spacer member 21. The spacer member 21 is formed in a substantially cylindrical shape, and a pivot 22 is formed in an internal space. Therefore, when the gimbal 20 is attached to the spacer member 21, a substantially central portion of the gimbal 20 is supported by the pivot 22. At this time, the pivot 22 is located in a space surrounded by the legs 14a, 14b, 14c, 14d, and 14e of the back core. Thus, the magnetic head device is mounted on the gimbal 20 supported by the pivot 22 and can be displaced with the pivot 20 as a fulcrum. The lower end of the spacer member 21 is attached to the support arm 23. Thus, the magnetic head device is attached to the support arm 23.

[0061]

As described above in detail, in the magnetic head device according to the present invention, the end surface in the middle of the winding guide groove is formed as an inclined surface inclined with respect to the second magnetic head element. . Therefore, in this magnetic head device, the second
The wire wound around the winding groove of the magnetic head element easily moves along the inclined surface of the winding guide groove, and quickly comes out of the terminal surface. Therefore, in this magnetic head device, since winding can be performed smoothly, the productivity is excellent and the manufacturing cost can be significantly reduced.

[Brief description of the drawings]

FIG. 1 is a perspective view of a magnetic head device according to the present invention.

FIG. 2 is a perspective view of the magnetic head device showing a state in which a winding is formed on the magnetic head device.

FIG. 3 is a perspective view of another magnetic head device according to the present invention, that is, a magnetic head device having a so-called three-piece structure.

FIG. 4 is a perspective view of another magnetic head device according to the present invention, which is a miniaturized three-piece magnetic head device.

FIG. 5 is a perspective view of another magnetic head device according to the present invention, that is, a magnetic head device having a so-called two-piece structure.

FIG. 6 is a perspective view of an element slider included in the magnetic head device.

FIG. 7 is a perspective view of a center slider included in the magnetic head device.

FIG. 8 is a perspective view of a lower head constituting the magnetic head device.

FIG. 9 is a perspective view of a side slider constituting the magnetic head device.

FIG. 10 is a perspective view showing a state in which an element slider, a center slider, a lower head, and a side slider are arranged in the order in which they are joined;

FIG. 11 is a perspective view showing a state where an element slider, a center slider, a lower head, and a side slider are joined.

FIG. 12 is a perspective view of the magnetic head device showing a state in which rail processing is performed on a facing surface of a flexible disk.

FIG. 13 is an exploded perspective view showing a back core structure joined to the magnetic head device.

FIG. 14 is a perspective view of a main part showing a mounting structure mounted on a support arm, with a part of the magnetic head device cut away.

[Explanation of symbols]

1 lower head, 2 upper head, 3 element slider, 4 center slider, 5 side slider, 6 slit groove, 7 fusion glass, 8 winding groove, 9 bonding glass, 10, 11 guide groove, 12 wire rod,

Claims (4)

[Claims] 1. A first magnetic head element for performing recording and / or reproduction at a first recording density, and a winding groove for winding a coil, wherein the recording density is higher than the first recording density. A second magnetic head element for performing recording and / or reproduction in the first and second magnetic head elements. The first magnetic head element and the second magnetic head element are arranged substantially in parallel with each other and integrated with a slider member. In the head device, a winding guide groove is formed at a position of the slider member corresponding to the winding groove of the second magnetic head element, the winding guide groove reaching an intermediate portion in the magnetic head element arrangement direction. A magnetic head device wherein a terminal surface of the portion is an inclined surface inclined with respect to the second magnetic head element. 2. The slider member includes an element slider in which the second magnetic head element is embedded, and a center slider disposed between the first slider and the first magnetic head element. In the element slider, a rectangular groove is formed over the entire width so that the winding groove of the second magnetic head element is exposed to the outside, and the center slider is provided on the side in contact with the element slider. 2. The magnetic head device according to claim 1, wherein an inclined groove is formed at the corner, and the rectangular groove and the inclined groove communicate with each other to form a winding guide groove. 3. The magnetic head device according to claim 1, wherein an inclination angle of the inclined surface with respect to the second magnetic head element is 30 ° to 60 °. 4. The first magnetic head element has a front core portion integrated with the slider member and a back core portion having a coil bobbin inserted and disposed and having a leg portion abutting against the front core portion. 2. The magnetic head device according to claim 1, wherein the front core portion and the back core portion form a closed magnetic circuit.