JPS6032106A - Magnetic head - Google Patents

Abstract

PURPOSE:To obtain an inexpensive magnetic head having high performance and high reliability by producing a front core part containing an action gap and a rear core part having a winding independently of each other and then putting both core parts together. CONSTITUTION:Core parts 34 containing sliders 27 adhered with the glass 28 having a low melting point are set at both sides of a magnetic head core part 26 having a magnetic action gap g1 for write/read and a magnetic action gap g2 for erasion. A rear core part 35 contains three rear magnetic core foot parts 36 which are butted to the ends of other side of core bars 23-25 forming the head core part 26 and form a magnetic circuit and six foot parts 37 which are formed in a body at both sides of each of parts 36 and are butted to the sliders 27. A coil 38 is wound around the parts 37. The parts 36 are butted to the bars 23-25 of the part 34. At the same time, other foot parts 37 are butted to the sliders 27 in a body. Thus a magnetic head 40 is obtained at a low cost and with high performance and high reliability.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a magnetic head used in a floppy disk drive.

1 Jr. Claw Technology and Its Problems Magnetic heads, ie, floppy heads, used in floppy disk drives include tunnel types, straddle types, and bulk types, and the floppy head of the present invention relates to the bulk type. As a conventional bulk type floppy head, for example, there is a structure shown in Fig. 1 (side view) and Fig. F (top view). For erasing, the magnetic gear knob■
The magnetic path length of the head core (11) having 2 is formed short, and sliders +21 ((2a
), (2b) and ) are joined together and the coil (3) is wound by hand.

The head core il+ is formed by joining the closed magnetic circuit core (4) of the magnetic gap g1 and the closed magnetic circuit core (5) of the magnetic gap g2.

This floppy head has a magnetic path length slider (2).
By setting the height to approximately 100 lbs., there are advantages in that core breakage is reduced, yield is improved, and pack gap variation is reduced, resulting in improved characteristics. but,
On the other hand, since the coil (3) is hand-wound, the manufacturing process becomes expensive, the low impedance specification makes the circuit board cheaper, and it cannot be applied to both sides. There are buff places such as Koto etc. Also, there is a buff place in Figure 2
Bulk-type Fushimugi Sohihetsu l'', -J1-/l', whose structure is not shown in Fig. 2B (side view) and Fig. 2B (decade view)
How many FM8fM of Hesodoni A full was wound on Sohi Heso F Tohi i92 with No. 1 sheet ζ, winding IW-
After inserting the head core (6), each of the head cores (11) is constructed by gluing one small core (7) with a closed IK on many sides, but this has the following drawbacks. There is.Immediately, due to the long magnetic path length of the belly button 1'1, the core (1) tends to break during processing and assembly.A micro core (7) with a small bonding surface. Since the back gear is glued, the back gear is likely to be uneven, and therefore the variation in the ζ characteristics becomes large.Since the grinding 118 length is long, the fJ
i (ik ll number increases. Since the same abrasive material is used for the recording medium sliding surface and the coil winding part, the material spine becomes convex.

In addition, since the above two kinds of (1) sobby heads are constructed by gluing the 211M sliders (2a) and (2b), there is a drawback that the number of parts and the number of gluings increases.

OBJECTS OF THE INVENTION In view of the above points, the present invention provides an inexpensive magnetic belly button that has +Ri performance and commercial reliability.

Summary of the Invention The present invention provides a "C magnetic recording medium" comprising a front magnetic head core part having an operating gap at one end between the core pieces and the magnetic sotonium part, which is integrated with the front magnetic head core part having an operating gap at one end between the core pieces. The mask core portion constituting the opposing surface is abutted against the other end of the core element piece, and is integrated with the rear magnetic core leg part and the rear magnetic core '1 leg part, which together with the pair of element pieces constitute a magnetic circuit. It has a rear core portion formed of another leg portion which is formed and abuts against the other surface of the mask core 1 portion, and a winding wire applied to the magnetic core leg portion, and the other end of the core piece and the rear portion The magnetic core legs are butted against each other, and the mask: I −
To the magnetic field formed by joining the other surface of the 7' part and the other leg part.
It's Sodo.

With the above configuration, commercial performance and 111111! 111
magnetic head can be obtained.

Practical Example The magnetic head of the present invention has working magnetic gaps g1 and g2.
A magnetic helad core part and a mask core part (location 1.W
A front core part that integrally includes a slider) and a rear core part that has a rear combined core leg part with windings and other leg parts are manufactured separately, and the two are combined to form a "ζ" structure. It is characterized by:

Hereinafter, one example of the present magnetic head will be explained along with its manufacturing method with reference to the drawings.

First, a magnetic block (II) made of, for example, areal density ferrite as shown in FIGS. 3A, B, and C.

Prepare (12) and (13). Next, as shown in FIG. 4A and B, the magnetic core blocks (11), (12
) to 3111 (in this example, 3111
After drilling grooves (14) of iI), one magnetic core block (11) has a write/read trunk width (
'r w+)), and the other magnetic core block (12) has a trunk I for erasing.
Grooves (16) for forming lvi (Tw2) are respectively bored.

Next, each magnetic core block (11), (12).

The magnetic gap forming surface (17) of (13) is mirror-finished 4JA@
Next, silicon dioxide, which will become a gear hole, is deposited on this magnetic gap forming surface (17) by vapor deposition.

Next, as shown in Figure 5, three magnetic core blocks (
11), (12), and (13) are combined at 1W position, respectively, and ζ-joined to the melting point glass (1@).

Next, this joined magnetic core Zoroku (1, I).

(12) and (13) were divided by cutting along the two-dot chain line (al) in a direction parallel to the groove (14), and
A plurality of magnetic rollers (18) are obtained in FIG. 6B (top view) and FIG. 6B (bottom view). As shown in Fig. 7A (top view) and Fig. 7 13 (bottom view), this magnetic pro-tock (18) has a positioning groove (19) for positioning it on the slider (27), which will be described later. ) and grooves (20), (21
) will be established. Next, the groove (1) of this magnetic block (18) is
After processing the solder joint (228) based on 4), the joint surface (228) with the rear core part (35), which will be described later, is processed.
B) and along the direction in which the predetermined trunk width is fi so as not to cross the chain line ('1) in FIG. 7A.
Cut the cock (1B). When cutting this 1tli, cut t
A magnetic block (
Measures such as gluing reinforcing blocks to both sides of the 18) are taken. Cut W11&, immerse the workpiece in a solvent such as acetone, ? ili strong block IL, Fig. 8A (
Each core piece (2
3) Obtain a front core portion (26) consisting of , (24) and (25).

On the other hand, as shown in figure ff19, the mask code ? A section or slider (z7) is provided. This slider (27) has a groove (51) with a funnel-shaped cross section extending in one direction on the rear surface, and a groove (52) with a square cross section along the direction perpendicular to the groove (51) on the front surface. formed with an inner groove (51)
A through hole (53) is formed at the intersection of (52) and (52). Then, place the magnetic hexagonal core so that the front surface of the magnetic hexagonal rear part (25) faces the slider (27) through its through hole (53). (26) and a low melting point glass (28) at a predetermined position.
(See Figure 10B (bottom view) and Figure 10C (side view)), melt the low melting point glass (28), and both (26>).

(27) and the 11th [1fl (rear view) and 1st
1. Obtain the front core block (29) shown in FIG. 82 (bottom view).

Note that the groove (3o) at the upper part of FIG. 11B is a groove through which a conductive paste is poured to ground the magnetic core part (26). The back surface (32) is polished using the front surface (31) of the front core block (29) as a reference.

Next, using this back surface (32) as a reference, the surface that will become the sliding surface of the magnetic recording medium shown by the two-dot chain line (33) in Figure B is polished into a spherical surface, and shown in Figure 12 (, jl As shown in FIG. 12B (bottom view) and FIG. 12C (side view), the front panel has an operating magnetic gap g1 for writing/reading and an operating magnetic gap g2 for erasing on both sides thereof. IM the core part (34).

On the other hand, a rear core part (35) made of a different upper culm from the front core part (34) is prepared. This rear core part (
35), as shown in FIG.
The other ends of the three core pieces (23), (24), and 25 constituting the navel core part (26) of 1 minute (34) are abutted against the other ends of these core pieces pairs (23), (24). )
and three rear magnetic core legs (36) which constitute a magnetic circuit together with the pair of core pieces (24) and (25), respectively, and integrated therewith on both sides sandwiching these rear magnetic core legs (36). The slider (27) has three (total six) other leg portions (37) which abut against the other surface of the slider (27). So-ζ, two rear magnetic core legs on the left and right (36
) is equipped with a coil bobbin (39) in which the coil (38) shown in Fig. 14 is wound by a winding machine.This coil bobbin (39) is integrally equipped with three terminals (54). It is being

After that, the navel core part (26) of the front core part (34) is removed.
), each core piece (23) , (24) , (25
), butt the rear magnetic core legs (36) against each other, and at the same time butt the other leg (37) against the slider (27).
The front core part (34) and the rear part (
ill 24A part (35) is combined with 'ζζ1st blood diagram), Figure 15B (bottom 1n1 with a part of 1tti surface).
In Figure 15C (side view), the magnetic head (
40) is obtained.

According to the present magnetic head (40), the front core portion (34)
and a rear core portion (35) are provided, respectively, and the two are joined together, thereby eliminating the occurrence of core breakage during processing and assembly. The front core part (34) and the rear core part (35) of °C1 are the core pieces (23), <24),
(25) is joined to the rear magnetic core leg (36), and at the same time the other leg parts (37) are joined to the sliders (27) on both sides, so a stable jointed state is obtained and there is little variation in the base gear. Characteristics improve. Also three core fragments (23).

Since the operating magnetic gap gx for writing/reading and the operating magnetic gear knob R2 for erasing are formed in (24) and (25), 4; 7'? ! The relationship is 1 t to 1 q
It will be done. In addition, the slider (27) and the navel core part (2
6), the reliability of the surface facing the magnetic recording medium is improved because the bonding is done by glass fusion.

1. At the same time, manufacturing becomes easier and manufacturing costs are reduced.

Furthermore, this magnetic head (40) is manufactured by combining the front core part (34) and rear core part (35), which were manufactured separately, and is manufactured using tetravalent materials and ultra-precision processing. The part that requires this is the magnetic head core part (26), and other parts, such as the rear core part (35), use materials that are cheaper than the conventional magnetic head core part (26), which is manufactured in one piece. In addition, the 2J 'j'7' C1y (1
1) Since one magnetic helad core part (26) is provided that can manufacture three times as many magnetic heads (40) with the same dimensions as (12) and (13), the number of man-hours and materials are significantly reduced. be able to.

For winding work, use a winding machine on the bobbin! The fact that it is only necessary to mount the coil (38) which has been irradiated makes it easier to manufacture the head (40).

Effects of the Invention According to the present invention, one part of the magnetic heel core that requires precision machining can be manufactured separately from other parts with high precision, and the magnetic heel core for configuring the magnetic circuit can be manufactured with high accuracy. Since the core portion and the rear core portion can be stably joined, a magnetic head with high performance and reliable fr1 properties can be obtained. In addition, the number of parts and man-hours are reduced, and the rear core part is
Since a cheaper material can be used than for the magnetic head 1', the price of the magnetic head can be reduced by one.

[Brief explanation of the drawing]

1 and 2 are diagrams for explaining a conventional magnetic head, and FIGS. 3 to 15 are process diagrams showing the manufacturing method of the magnetic head of the present invention. (23), (24), (25) are core fragments, (26)
) is the front magnetic head core part, (27) is the mask 2JA part, (34) is the front core part, (35) Haru & fl
l 2 l 'j' part 'y), (36) is the rear magnetic core leg, (37) is the other II! Part 11, (38) is the coil, and (40) is the haiku head 1. Figure 1 Figure 2 Figure 3 Figure 4 Figure 6 Figure 7 A A B B 2J Figure 8 A B 6 Figure 9 Figure 10 Figure 11 Figure 12 Short C [2 F [2] 27 Figure 13 Electric Figure 14 Figure 15 Elevation

Claims (1)

[Claims] a front magnetic held core part having an operating gap at one end between the core pieces; and a mask core part that is integrated with the magnetic held core part and forms a surface facing the recording medium at -if+7. , a rear magnetic core leg portion which abuts against the other end of the core piece and forms a magnetic circuit together with the pair of core pieces; and a rear magnetic core leg portion which is formed integrally with the rear magnetic core leg portion and abuts against the other surface of the mask core portion. The rear part '7 consisting of the other leg part ζ and the magnetic core '7' A magnetic gift having a winding wire applied to a leg part, the other end of the core piece and the rear magnetic core leg part being butted against each other, and the other surface of the mask core part and the other leg part being joined.