JPH05210822A - Magnetic head device - Google Patents

Abstract

PURPOSE:To enable changing of substantial height of a magnetic head by inserting a spacer of desired height between the magnetic head part and a substrate on which the magnetic head is mounted. CONSTITUTION:The magnetic head 23 is mounted on a magnetic head substrate 5, for example, a gimbal via a spacer 24. The height (h) of the head is given by the height (hs) of the spacer 24 and the height H of the magnetic head part 23. Therefore, magnetic heads of various heights H can be formed for various specifications by only exchanging spacers of different heights while the common magnetic head part 23 of same height H is used.

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, and more particularly to a magnetic head device suitable for application to a floppy disk type magnetic recording / reproducing device.

[0002]

2. Description of the Related Art A conventional floppy disk type magnetic recording / reproducing apparatus is shown in FIG. 7 which is a side view in which a part of a main portion is shown in section, and FIG. 8 is a perspective view of the main portion. The floppy disk, that is, the magnetic recording medium 1 is rotatably supported in the case 2, and a part of the floppy disk is the case 2.
The magnetic heads H ₀ and H _{1 of} so-called side 0 and side ₁ are arranged on both sides of the magnetic recording medium 1 through the windows 3 formed on the upper and lower surfaces of the magnetic recording medium 1.

As shown in the perspective view of FIG. 9, each of the magnetic heads H ₀ and H ₁ faces the contact surface S with the magnetic recording medium 1 and has a recording / reproducing magnetic gap g ₁ and a track width direction thereof. And an erasing magnetic gap g ₂ arranged at positions corresponding to both ends of the magnetic core part are arranged side by side with a required gap therebetween, and although not shown, a magnetic core portion forming a closed magnetic path including these magnetic gaps g ₁ and g ₂ respectively. Then, the magnetic head portion 4 having the coil portion wound around them is attached to the magnetic head attachment substrate 5 and attached to the so-called carriage 6.

These magnetic head mounting substrates 5 are generally rigid substrates for the side 0 magnetic head H ₀ , and elastic substrates, so-called gimbals, are used for the side 1 magnetic head H ₁ , so that both magnetic heads are used. H ₀ and H ₁ can be satisfactorily contacted on both sides of the magnetic recording medium 1 with the magnetic recording medium 1 sandwiched therebetween.

The terminals derived from the respective coil terminals of the magnetic heads H ₀ and H ₁ mounted on the mounting substrate 5 in this manner are electrically connected to the other by, for example, a flexible printed circuit (FPC) 7.

In such a magnetic head device, the height of the magnetic head, for example, from the head mounting surface of the mounting substrate 5 to the front surface of the magnetic gaps g ₁ and g ₂ , that is, the contact surface S, is demanded in order to reduce the overall size. The distance h is to be as small as possible.

However, on the other hand, the height of the magnetic head required in the magnetic head device with respect to the conventional recording / reproducing device or with respect to the recording / reproducing device of various specifications is various. At present, the magnetic heads having different heights h are manufactured in accordance with the demands of each manufacturer of the recording / reproducing apparatus, which is extremely inefficient and non-mass production.

[0008]

DISCLOSURE OF THE INVENTION The present invention provides a magnetic head device of the above-mentioned magnetic disk reproducing device, for example, of a floppy disk type, which has a desired height with reasonable and efficient productivity. The configuration is such that it can be reliably obtained.

[0009]

The present invention is described in FIG.
A side view of an example is shown in FIG. 2, its front view, and in FIGS. 3 and 4.
As shown in the exploded perspective view, on the contact surface S with the magnetic recording medium,
Facing the magnetic gap g ₁, G₂Formed these magnetic
Gap g₁And g₂A magnetic coil that forms a closed magnetic circuit containing
Magnetic head part 23 having a part 21 and a coil part 22
Is on the side opposite to the surface S facing the magnetic recording medium 1.
Magnetic head mounted on magnetic head mounting substrate 5
In the device, the magnetic head portion 23 and the magnetic head are attached.
The required height h from the substrate 5_sIntervening spacer 24
The magnetic gap with respect to the magnetic head mounting substrate 5.
g₁, G₂Of the distance h to the contact surface S with the magnetic recording medium of
Make settings. It should be noted that in FIGS.
The same reference numerals are given to the portions corresponding to.

[0010]

In the present invention, the height H of the magnetic head portion 23 itself is designed and manufactured to a predetermined height by presetting it to the minimum height of the required magnetic head device. h
Only by interposing the spacer 24 manufactured with _s between the magnetic head portion 5 and the magnetic head mounting substrate 5, a magnetic head device having a required height as a whole, that is, a required height h is configured.

Therefore, according to the present invention, the magnetic heads 23 of various heights h and the magnetic head portion 23 having a single height H are provided for the lid.
Since the magnetic head device is commonly used, the magnetic head device having the target height can be efficiently obtained with high accuracy in mass production.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An example of a magnetic head according to the present invention will be described with reference to FIGS.

In this case, the present invention can be applied to the magnetic head device having the double-sided magnetic heads of side 0 and side 1 described in FIG. 5, but in FIGS. Only the magnetic head H _{1 on the} side 1 is shown.

On the outer circumference of the magnetic head portion 23, a magnetic shield body 25 having, for example, a rectangular tube shape is arranged.

In the magnetic shield 25, for example,
A recording / reproducing magnetic gap g ₁ and an erasing magnetic gap g ₂ composed of a pair of gap portions are formed at both ends in the track width direction of the gap g ₁ while maintaining a required gap in parallel with the magnetic gap. The front core 21F of the magnetic core portion 21,
Sliders 26 and 27, which are made of ceramic, non-magnetic metal, or the like and are formed on both sides of the slider, and which form a part of the contact surface S with the magnetic recording medium 1, are provided.

Each pair of front core portions 21F forming the magnetic gaps g ₁ and g ₂ is provided with a pair of columnar core portions 28 extending rearward, and a non-magnetic material 29 is provided between the pair of front core portions 21F. Is intervened.

Then, for example, coil bobbins 31 around which the coil portions 22, that is, the head coils 30 are wound, are fitted around the outer peripheries of the columnar core portions 28 on both outer sides.

On the other hand, the two pairs of columnar portions 2 of the front core portion 21F.
For example, a pair of U-shaped rear core portions 21 </ b> B that are superposed on the side surfaces of 8 and magnetically coupled to each other are provided by being inserted into the coil bobbin 31. A non-magnetic material 29 is similarly interposed between the pair of rear core portions 21B.

Further, the slider 26 is provided with an auxiliary support column 32 which is inserted integrally with the slider 26 in the coil bobbin 31 along the respective columnar core portions 28.

Then, the pressing piece 36 is placed in the coil bobbin 31.
Is inserted, and the core portion 28 is held and held toward the auxiliary column 32.

Further, the slider 27 is also provided with, for example, three columns 33.

The mounting substrate 5 having a gimbal structure is formed by punching out, for example, one elastic metal plate as in the usual case, and has a rectangular frame-shaped portion 24A, and the frame portion 34A faces the square frame-shaped portion 24A. Connection part 34 only in the middle part of the two sides
The inner frame portion 34C to be connected by B, and further inside thereof, the connecting portion 34 only at the intermediate portion of the other two sides of the inner frame portion 34C.
It has a central plate portion 34E connected with D.

Then, the mounting substrate 5 of this gimbal structure
On the central plate portion 34 of the
Install via 4.

The spacer 24 is made of ceramic, non-magnetic metal, or the like, and has a required height (thickness) h _s provided with a through hole 24A penetrating the terminal pin 35 provided on the coil bobbin 31, for example. It may have a "Sun" shape.

The spacer 24 has one surface 24B.
And the end faces of the magnetic shield body 25 and the end faces of the columns 32 and 33, for example, are abutted against each other and adhered by, for example, an adhesive, and the other face 24C of the spacer 24 is provided.
Are abutted against the central plate portion 24E of the magnetic head mounting substrate 5 and adhered by, for example, an adhesive.

In this way, the magnetic head portion 23 is attached to the magnetic head mounting substrate 5 such as the gimbal via the spacer 24.

In this state, the terminal pins 35 of the magnetic head portion 23 are led out to, for example, the back surface of the magnetic head mounting substrate 5, and are connected to the corresponding wiring conductive layers of the flexible printed circuit board 7 by soldering or the like.

At this time, the height h of the magnetic head is
The height h _s of the spacer 24 and the height H of the magnetic head portion 23
Given as the sum of.

Therefore, for example, the required magnetic head
Height h of 2.7 mm, 2.5 mm, 2.3 mm,
In the case of 2.1 mm, H = 2.1 mm
Every other, height h as spacer 24_sIs 0.6m
Prepare various types of m, 0.4 mm, 0.2 mm
Then, by selecting and using these, h = H + h
_sCan be given at. That is, 2.7 mm = 2.1 + 0.6 2.5 mm = 2.1 + 0.4 2.3 mm = 2.1 + 0.2 2.1 mm = 2.1 + 0.

Although the mounting substrate 5 has a gimbal structure in the above-mentioned example, the mounting substrate 5 can be a rigid substrate in, for example, the side 0 magnetic head.

Further, the spacer 24 is not limited to the above-described example, and as shown in FIG.
With one or as shown in FIGS. 5B and 5C,
In other words, the shape of the through hole 24A can be various shapes such as a cross shape and a curved shape of the crosspiece in the outer peripheral frame.

Further, in the above-mentioned example, the end face of the magnetic shield body 25 is abutted against the spacer 24. However, the magnetic shield body 25 has a bottom as shown in the sectional view of the example in FIG. Various modifications and changes can be made, such as a cup-like shape, and the spacer 24 is disposed in the bottom portion of the cup-shaped portion, and the magnetic head portion 23 is placed on the spacer 24.

[0033]

As described above, according to the configuration of the present invention, the common magnetic head portion 23, that is, the magnetic head portion 2 having the same height H is used.
3, the spacers 24 having different heights are simply exchanged for use, so that various magnetic heads having different heights H can be configured in accordance with various specifications.
The core 28 for changing the height of the magnetic head portion 23 itself,
29, the lengths of the columns 32 and 33, the length of the bobbin 31, etc. are all changed, and compared with the case of designing and manufacturing, the manufacturing is simpler, the mass productivity is improved, and the price is reduced.
The improvement in accuracy and other factors have made it possible to achieve great industrial benefits.

[Brief description of drawings]

FIG. 1 is a side view of an example of a magnetic head device according to the present invention.

FIG. 2 is a front view of an example of a magnetic head device according to the present invention.

FIG. 3 is an exploded perspective view of an example of a magnetic head device according to the present invention.

FIG. 4 is an exploded perspective view of a magnetic head unit.

FIG. 5 is a perspective view of each example of a spacer.

FIG. 6 is a partial cross-sectional side view showing another example of the positional relationship between the magnetic head portion and the spacer.

FIG. 7 is a side view in which a part of a main part of a conventional magnetic recording / reproducing device is shown as a cross section.

FIG. 8 is a perspective view showing a positional relationship between a magnetic head and a magnetic recording medium.

FIG. 9 is a perspective view showing a mounting state of a magnetic head unit on a magnetic head mounting substrate.

[Explanation of symbols]

1 magnetic recording medium 5 magnetic head mounting substrate H ₀ magnetic head H ₁ magnetic head 21F front core portion 21B rear core portion 21 core portion 22 coil portion 23 magnetic head portion 24 spacer 25 magnetic shield body

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hideko Matsumoto 6-5-6 Kita-Shinagawa, Shinagawa-ku, Tokyo Inside Sony Magne Products Co., Ltd.

Claims (1)

[Claims] 1. A magnetic head portion having a magnetic core portion having a magnetic gap formed facing a contact surface with a magnetic recording medium and having a closed magnetic path including the magnetic gap, and a coil portion, wherein the magnetic recording is performed by the magnetic recording medium. In a magnetic head device mounted on a magnetic head mounting substrate on a side opposite to a surface facing a medium, a spacer having a required height is interposed between the magnetic head portion and the magnetic head mounting substrate. A magnetic head device is characterized in that a distance from a magnetic head mounting substrate to a contact surface of the magnetic gap with the magnetic recording medium is set.