JPH07282426A - Production of magnetic head device - Google Patents

Abstract

PURPOSE:To obtain a process for producing a magnetic head device capable of exactly and easily producing a magnetic head device having high mounting accuracy. CONSTITUTION:This magnetic head device has a magnetic head chip 2 which is formed with a flat surface 3 in the part to be formed with a magnetic gap G1, a head mounting base plate 10 which is adhered and fixed to project the flat surface 3 from a head mounting base plate 10 and a mounting position reference member 15 which comes into contact with the flat surface 3 in a position parting a distance L1 so as to project the magnetic head chip 2 from the head mounting base plate 10. magnetic head chip 2 is placed on the head placing surface 10a of the head mounting base plate 10 and thereafter, the magnetic head chip 2 is slid toward the mounting position reference member 15. An adhesive is applied on the magnetic head chip 2 and the head placing surface 10a when the flat surface 3 comes into contact with the mounting position reference member 15.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of manufacturing a magnetic head device in which a magnetic head is mounted on a head mounting base with its medium sliding surface protruding.

[0002]

2. Description of the Related Art For example, a video tape recorder (hereinafter referred to as
It is called "VTR". A magnetic head device mounted on a rotary drum and recording and / or reproducing an information signal by contacting with a magnetic recording medium is known as a magnetic recording / reproducing device.

The magnetic head device is constructed such that the magnetic head is mounted on a plate-shaped head mounting base in a state where the medium sliding surface thereof is projected, and the magnetic head rotates together with the rotary drum to cause the magnetic head to move. The recording and / or reproducing of the information signal is performed by contacting the magnetic recording medium running at a certain angle along the peripheral surface of the rotating drum.

In such a magnetic head 101, for example, as shown in FIG. 6, a magnetic core half body 103 having a winding groove 102 around which a coil is wound and a magnetic core half body 104 having no winding groove are projected. The magnetic gap g1 is formed between the abutting surfaces 103a and 104a by being joined and joined together.

The medium sliding surface 105 forming the magnetic gap g1 is formed by lapping to an arcuate R shape in order to secure contact with the magnetic recording medium and reduce spacing loss. Has been done.

When mounting the magnetic head 101 on the head mounting base 106, as shown in FIG. 7, the magnetic head 101 is mounted on the front side 107 of the head mounting base 106. The arc-shaped medium sliding surface 10
Place 5 in a protruding state.

Next, after the predetermined protrusion amount L2 of the magnetic head chip 101 from the head mounting base 106 is measured by, for example, a scale, the magnetic head chip 10 is measured.
1 is moved to a predetermined position, adhesive is applied to the adhesive application points 108 and 109, and the magnetic head 101 is adhesively fixed to the head mounting base 106 to complete the magnetic head device 111. To do.

[0008]

By the way, in order to always obtain a good hitting characteristic with respect to the magnetic recording medium running on the peripheral surface of the rotating drum, the magnetic head 101 is subtly adjusted by It is necessary to highly accurately adhere and fix the magnetic head 101 to the head mounting base 106.

However, since the medium sliding surface 105 of the magnetic head chip 101 is polished into an arcuate shape R in order to ensure contact with the magnetic recording medium, the head mounting base 106 of the magnetic head chip 101 is described. Is likely to occur, and it is difficult to bond and fix it in a correct position. Therefore, in order to accurately mount the magnetic head chip 101, a highly skilled mounting technique is required, and there is a problem that the mounting time also takes a long time.

In addition, it is difficult to manufacture the magnetic head device 111 having a uniform accuracy by the above conventional manufacturing method, and in some cases, a magnetic head device 111 having a low yield may be manufactured.

Therefore, it is an object of the present invention to provide a method of manufacturing a magnetic head device, which is capable of accurately and easily manufacturing a magnetic head device having high mounting accuracy when mounting the magnetic head on a head mounting base. .

[0012]

In order to solve the above problems and achieve the above object, a method of manufacturing a magnetic head device according to the present invention forms at least a magnetic gap on a medium sliding surface that is in sliding contact with a magnetic recording medium. A method of manufacturing a magnetic head device, wherein a magnetic head chip having a flat surface formed on a portion thereof is adhesively fixed to a head mounting surface of the head mounting base so that the flat surface projects from the head mounting base. After mounting the magnetic head chip on the head mounting surface of the head mounting base, a magnetic gap of the magnetic head chip is formed at a position spaced from the head mounting base by which the magnetic head chip should be projected. A mounting position reference member that comes into contact with the flat surface of the portion is provided, and the magnetic head chip is slid toward the mounting position reference member, and the flat surface contacts the mounting position reference member. When, characterized in that so as to apply the adhesive over the mounting surface magnetic head chip and a head.

Further, the medium sliding surface of the magnetic head chip is formed in a polygonal shape.

[0014]

According to the method of manufacturing the magnetic head device of the present invention, the magnetic head chip is slid toward the attachment position reference member,
When the flat surface comes into contact with the attachment position reference member, the adhesive is applied across the magnetic head chip and the head mounting surface. Therefore, even when the magnetic head chip is mounted with an inclination with respect to the head mounting base, the magnetic head chip can be mounted at an accurate position by obtaining this contact state.

Also, in the method of manufacturing a magnetic head device of the present invention, an attachment position reference member which comes into contact with the flat surface of the magnetic head chip is provided at a position spaced from the head attachment base by a distance at which the magnetic head chip should be projected. The magnetic head chip is slid toward the mounting position reference member. Therefore, the amount of protrusion of the magnetic head chip from the head mounting base is always a constant amount of protrusion, and uniform accuracy can be obtained.

Further, when the medium sliding surface of the magnetic head chip is formed in a polygonal shape, when the medium sliding surface is finally polished into an arc shape, the polishing process is easy and accurate. A circular arc-shaped medium sliding surface is formed.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Specific embodiments to which the present invention is applied will be described in detail below with reference to the drawings.

As shown in FIG. 1, the magnetic head device 1 of this embodiment is constructed by magnetically bonding a magnetic head 2 which is a magnetic head chip to a head mounting base 10. The magnetic head device 1 of the present embodiment is constructed so that the medium sliding surface 2a of the magnetic head chip 2 projects from the front side of the head mounting base 10 and can make sliding contact with the magnetic recording medium. Is.

First, the head mounting base 10 to which the magnetic head chip 2 is bonded and fixed has a substantially square plate shape, and the front surface side is a head mounting surface 10a. Further, each side of the above-mentioned substantially square is formed in a straight line so as to become reference planes X1, X2, Y1, Y2 in the assembly process. That is, the front end surface 11 and the rear end surface 12 of the head mounting base 10 are reference planes X for adjustment with respect to the protruding direction of the medium sliding surface 2a of the magnetic head chip 2.
1 and X2, and both side sides 13 and 14 are reference planes Y1 for adjustment with respect to a lateral direction intersecting the protruding direction.
It will be Y2.

In the present embodiment, the reference surface X1 of the front end surface 11 of the head mounting base 10 and the reference surface Y of the one side surface 13 are provided.
1 will be described as a reference, but 12 reference planes X of the rear end face
2 and the reference surface Y2 of the other side surface 14 may be used as a reference.
Furthermore, both the reference plane X1 of the front end face 11 and the reference plane X2 of the rear end face 12, the reference planes Y1,
Both Y2 may be used as a reference.

A mounting position reference member 15 is arranged near the head mounting base 10. The mounting position reference member 15 is provided in parallel to a position separated by a distance L1 from which the magnetic head chip 2 should protrude from the head mounting base 10 with the front end surface 11 of the head mounting base 10 as a reference plane X1. ing. The distance L1 is set by adjusting the amount of protrusion of the magnetic head chip 2 from the head mounting base 10, and may be accurately measured in advance by a scale or the like, and will be described later. Alternatively, the magnetic head chip 2 may be appropriately determined in a state of being mounted on the head mounting base 10. The distance L1 is set according to the size and type of the magnetic head chip 2.

The mounting position reference member 15 has a parallel surface 16 on the side facing the flat surface 3 of the magnetic head chip 2 so as to be in surface contact with the flat surface 3 of the magnetic head chip 2. If so, especially its size,
The shape and the like are not particularly limited.

On the other hand, in the magnetic head chip 2 mounted on the head mounting base 10, as shown in FIG. 2, a coil is wound and a winding groove 4 for restricting the depth of the magnetic gap G1 is formed. The first magnetic core half body 5 that it has and the second magnetic core half body 6 that does not have a winding groove are butt-joined and integrated, and they are joined and integrated by a joining means such as glass fusion, and their butt surfaces 5a, 6a. Magnetic gap G1 between
Is configured.

The magnetic gap G1 is a portion for magnetizing a magnetic recording medium such as a magnetic tape or picking up a magnetic flux of the magnetic recording medium to obtain a reproduction output or the like. 2 abutment surface 5a with the magnetic core half body 6,
A gap film of silicon oxide (SiO ₂ ) or the like is formed on 6a.

The magnetic gap G1 is formed in a polygonal shape including the flat surface 3 as shown in FIG. Forming a polygon like this is
It is preliminarily formed in order to facilitate the formation of the accurate circular arc shape R by lapping performed in the later manufacturing process. The flat surface 3 is formed on the tip side of the portion of the polygonal shape where the magnetic gap is formed.
The flat surface 3 serves as a reference surface for preventing the magnetic head chip 2 from tilting.

When forming the flat surface 3 of the magnetic head chip 2, the reference surface X1 of the head mounting base 10 is formed.
It must be formed so that the surface is parallel to. When forming the flat surface 3, the bottom surface 7 of the ordinary magnetic head chip 2 has a linear shape. Therefore, the flat surface 3 may be formed in parallel with the bottom surface 7. In this case, since the flat surface 3 is parallel to the bottom surface 7 and the reference surface X2 of the rear end surface 12 described above, the reference surface X1 is consequently a parallel surface.

Here, the flat surface 3 of the magnetic head chip 2 has the same length in both the core halves 5 and 6 with the magnetic gap G1 of the pair of magnetic core halves 5 and 6 as a boundary. Has been formed. The length of the flat surface 3 varies depending on the size, type, etc. of the magnetic head chip 2, but as a result of various trial manufactures, the first magnetic core half body 5 is obtained.
Has a length M1 of about 100 to 300 μm,
The length M2 of the side formed on the second magnetic core half 6 is also about 100 to 300 μm, and the total M of these is about 2
It is preferable that the length is from 00 to 600 μm. That is, the length of the flat surface 3 depends on the mounting position reference member 15
When the medium sliding surface 2a of the magnetic head chip 2 is in surface contact with the head mounting base 10, the magnetic head chip 2 is not tilted with respect to the head mounting base 10 and has a stable length.

Next, a method of manufacturing the magnetic head device will be described.

First, as shown in FIG. 1, the magnetic head chip 2 having the medium sliding surface 2b formed in a polygonal shape is mounted on the head mounting surface 10a of the head mounting base 10. In this state, although it is a temporary placement state, it is preferable to place it on the expected head placement surface 10a.

Next, the lateral position perpendicular to the direction in which the flat surface 3 of the magnetic head chip 2 projects is measured from the reference plane Y1 on the one side surface 13 and the magnetic head chip 2 is slid to that position. Let

Next, the position of the mounting position reference member 15 is adjusted. That is, the mounting position reference member 15 is fixed so as not to move in accordance with the position at which the magnetic head chip 2 should be projected from the head mounting base 10 at a distance L1.

Next, the magnetic head chip 2 is slid toward the mounting position reference member 15. By this slide, the flat surface 3 of the magnetic head chip 2 comes into contact with the mounting position reference member 15, and the adjustment is performed as follows.

First of all, as shown in FIG. 3, the flat surface 3 formed on the medium sliding surface 2a of the magnetic head chip 2 by the slide is the parallel surface 1 of the mounting position reference member 15.
6 is in surface contact with the above magnetic head chip 2
Is a stable state in which the head mounting base 10 is accurately placed without tilting. This is because, as shown in FIG. 1, the mounting position reference member 15 has a distance corresponding to the amount of protrusion of the medium sliding surface 2a from the head mounting base 10 with reference to the reference surface X1 of the fixed head mounting base 10. L1
This is because they are arranged in parallel with each other.

Therefore, when the above-mentioned surface contact state is obtained, the magnetic head chip 2 and the head mounting surface 10a are then bonded at the bonding points 17 and 18 on both sides of the pair of magnetic core halves 5 and 6. The magnetic head chip 2 may be adhesively fixed to the head mounting base 10 by applying an adhesive over the entire area.

However, due to the slide, the flat surface 3 of the magnetic head chip 2 may not come into surface contact with the parallel surface 16 of the mounting position reference member 15, as shown in FIG. In such a state, the magnetic head chip 2 is tilted with respect to the head mounting base 10 (indicated by Q in the figure), and is not accurately placed and is unstable.
This is because a parallel position with a constant interval L1 which is the amount of protrusion of the medium sliding surface 2a from the head mounting base 10 with reference to the reference surface X1 of the head mounting base 10 to which the mounting position reference member 15 is fixed. This is because the inclination is caused by the above-mentioned Q ° because it is arranged at. Therefore,
It is necessary to adjust the surface contact to 0 °, and as a result, as shown in FIG. 3, when the surface contact is made, the adhesive points 17 and 18 are coated with an adhesive and bonded. Fix it.

After the magnetic head chip 2 is bonded and fixed to the head mounting base 10 in this manner, as shown in FIG. 2, the polygonal shape of the magnetic head chip 2 to be the sliding surface 2a of the magnetic recording medium is obtained. The shaped medium sliding surface 2a is polished into a circular arc shape R by lapping. In this case, the medium sliding surface 2a
Is formed in advance in a polygonal shape, the medium sliding surface 2a can be easily formed in an accurate arcuate shape R by lapping the corners.

Here, the adjustment of the position of the mounting position reference member 15 only needs to be made when the types of the magnetic head devices 1 to be produced are different, and the magnetic head devices 1 of the same type are continuously produced. In this case, it is not necessary to adjust the position. Therefore, after mounting a plurality of magnetic head chips 2, 2, 2 sequentially obtained by cutting the core block on the head mounting surface 10 a of the head mounting base 10,
There is no need to adjust the position, and the step of simply sliding the magnetic head chips 2, 2, 2 toward the attachment position reference member 15 and bringing the flat surface 3 into contact with the attachment position reference member 15 is performed. All you need is a transition. Therefore, it is possible to mass-produce the magnetic head devices 1 that are uniform and have high mounting accuracy in a short time.

Finally, by lapping the polygonal medium sliding surface 2a, the magnetic head device 1 in which the magnetic head chip 2 is adhered and fixed to the head mounting base 10 as shown in FIG. Is completed. In this polishing process, since the medium sliding surface 2a of the magnetic head chip 2 is formed in a polygonal shape, the polishing process of the circular arc shape R is easy, and the medium sliding surface of the accurate circular arc shape R is easy. 2a will be formed.

The magnetic head device 1 thus completed is mounted on a rotary drum provided in the main body of the VTR, and is used as a magnetic recording medium running around the peripheral surface of the rotary drum at an angle. It is arranged so as to be in contact with each other. In this state, the magnetic head chip 2 comes into contact with the magnetic recording medium to obtain a reproduction output or the like. The magnetic head device 1 manufactured by the manufacturing method described above.
Provides a good hit against the magnetic recording medium with no spacing loss or the like. Therefore, the magnetic head device 1 can trace the track of the magnetic recording medium 10 to pick up the magnetic flux and obtain a sufficient reproduction output.

The magnetic head device 1 according to the above embodiment is
The present invention is not limited to the above-mentioned one, and a so-called metal-made metal magnetic film arranged in the vicinity of the magnetic gap G1 can be used as long as it can form the flat surface 3 parallel to the reference surfaces X1 and X2 of the head mounting base 10. It goes without saying that the same action and effect can be obtained even when applied to an in-gap type magnetic head.

[0041]

According to the method of manufacturing a magnetic head device of the present invention, a magnetic head chip in which a flat surface is formed on at least a portion which becomes a magnetic gap of a medium sliding surface that is in sliding contact with a magnetic recording medium is A method for manufacturing a magnetic head device, wherein a magnetic head chip is attached and fixed to a head mounting surface of the head mounting base so as to project from the head mounting base, wherein a magnetic head chip is mounted on the head mounting surface of the head mounting base. After mounting, a mounting position reference member is provided at a position spaced from the head mounting base by a distance at which the magnetic head chip should be projected, and the mounting position reference member comes into contact with the flat surface of the magnetic gap of the magnetic head chip. When the chip is slid toward the mounting position reference member and its flat surface comes into contact with the mounting position reference member, the chip contacts the magnetic head chip and the head mounting surface. Characterized in that so as to apply the agent. Therefore, it is possible to manufacture a magnetic head device with high uniform mounting accuracy accurately and easily.

Further, when the medium sliding surface of the magnetic head chip is formed in a polygonal shape, when the medium sliding surface is finally polished into an arc shape, the polishing process is easy and accurate. A circular arc-shaped medium sliding surface is formed,
It is possible to manufacture a magnetic head device with higher accuracy.

[Brief description of drawings]

FIG. 1 is a schematic plan view showing a method of adhesively fixing a magnetic head to a head mounting base in a manufacturing process of a method of manufacturing a magnetic head device according to an embodiment of the present invention.

FIG. 2 is a plan view showing a magnetic head applied to the above embodiment.

FIG. 3 is an enlarged plan view showing a stable state in which a flat surface of the magnetic head is in surface contact with a mounting dimension reference surface.

FIG. 4 is an enlarged plan view showing an unstable state in which the flat surface of the magnetic head is not in surface contact with the mounting dimension reference surface.

FIG. 5 is a plan view showing a state in which a magnetic head device is completed by the method for manufacturing the magnetic head device.

FIG. 6 is a schematic view seen from a plan view showing a case where a magnetic head is adhesively fixed to a head mounting base in a manufacturing process of a conventional method of manufacturing a magnetic head device.

FIG. 7 is a plan view of the conventional magnetic head.

[Explanation of symbols]

 1 magnetic head device 2 magnetic head 2a medium sliding surface 3 flat surface of medium sliding surface 10 head mounting base 10a head mounting surface 15 mounting position reference member 17, 18 bonding point G1 magnetic gap L1 projecting magnetic head chip Power distance X1, X2, Y1, Y2 Reference plane of head mounting base

Claims (2)

[Claims] 1. A magnetic head chip having a flat surface formed on at least a magnetic gap of a medium sliding surface that is in sliding contact with a magnetic recording medium, the head mounting so that the flat surface projects from a head mounting base. A method of manufacturing a magnetic head device that is adhesively fixed to a head mounting surface of a base, wherein the magnetic head chip is mounted on a head mounting surface of a head mounting base, and then the head mounting base is removed. A mounting position reference member is provided at a position spaced apart from the magnetic head chip by which the magnetic head chip is projected, and the mounting position reference member is in contact with the flat surface of the magnetic gap of the magnetic head chip, and the magnetic head chip is slid toward the mounting position reference member. When the flat surface comes into contact with the mounting position reference member, an adhesive is applied across the magnetic head chip and the head mounting surface. The method of manufacturing a magnetic head device that. 2. The method of manufacturing a magnetic head device according to claim 1, wherein the medium sliding surface of the magnetic head chip is formed in a polygonal shape.