JPH01133207A - Magnetic head - Google Patents

Abstract

PURPOSE:To improve the recording and reproducing output of a magnetic head with the small number of windings of a coil by forming a second winding window in a position opposite to the winding window of a connecting glass and winding the coil on a core through these winding windows. CONSTITUTION:The second winding window 14 is disposed at the position opposite to the first winding windows 1a, 5a formed on the first cores 1, 5 of the joint glass 8 through the second cores 2, 6. Then, the coils 9, 10 having 9a, 10a connected to 9b, 10b. Sliders 15, 16 connected to both the sides of the magnetic head 11 has a gate from in which a part having the coils 9, 10 mounted is notched. A head core block consisting of the first core 1 and the second core 2 is a R/W head 4a and a head core block consisting of the first core 5 and the second core 6 is a ERS head 4b.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to a magnetic head, and particularly to a composite magnetic head in which a plurality of heads are bonded together via a bonding glass.

(Prior Art) A magnetic head that is mounted on the carriage of a floppy disk device and records and reproduces information on a recording medium includes a recording/reproducing head (hereinafter referred to as an R/W head) and an erasing head (hereinafter referred to as an ERS head). Composite magnetic heads are widely used, in which both are joined together by a bonding glass made of a glass member with a relatively low melting point. This composite magnetic head has conventionally been constructed as shown in FIGS. 8 and 9. That is, as shown in FIG. 8, a first core 1 in which a winding window 1a is formed and a prismatic second core 2 are joined via a magnetic gap 3 to form an R/W head 4a. ing. Similarly, a first core 5 in which a winding window 5a is formed and a prismatic second core 6 are joined via a magnetic gap 7 to form an ERS head 4b. These R
The /W head 4a and the ERS head 4b are each bonded by a bonding glass 8 over the entire opposing surface of the second core 2.6.

According to the conventional magnetic head configured as described above,
When winding the R/W head 4a and the ERS head 4b with 9 and 108 coils, it is impossible to wind the coils on the second cores 2 and 6, so it is impossible to wind the coils on the first cores 1 and 5. Coils 9 and 10 were wound through windows 1a and 5a. However, in a magnetic head having the above-mentioned shape, generally, rather than winding the coils 9,108 around the first core 1.5 with the winding windows 1a and 5a processed, the winding windows 1a and 5a are wound around the unprocessed second core. By winding coils 9 and 10 around coils 2 and 6, a sufficient recording and reproducing output of the magnetic head can be obtained from the viewpoint of electromagnetic conversion efficiency. Therefore, in order to obtain sufficient recording and reproducing output in the conventional composite magnetic head described above, it is necessary to increase the number of turns of the coils 9 and 10 wound around the first cores 1 and 5 of both heads 4a and 4b. was there.

On the other hand, as shown in FIG. 9, sliders 12 and 13 are bonded to both sides of the composite magnetic head 11, which is formed by integrating the R/W head 4a and the ERS head 4b. These sliders 12 and 13 need to be machined into a single-shape shape so that the coils 9 and 10 can be wound around the first cores 1 and 5. For this reason, the drawback of increasing the number of processing steps is also rare.

(Problems to be Solved by the Invention) As mentioned above, in the conventional composite magnetic head,
Since the entire opposing surfaces of adjacent head core blocks are bonded by bonding glass, a coil cannot be wound around an adjacent core, so a coil is wound around a core in which a winding window is formed. As a result, a sufficient recording/reproducing output of the magnetic head cannot be obtained, and in order to increase this output, it is necessary to increase the number of turns of the coil.

Furthermore, the shape of the slider bonded to both sides of the head core block becomes complicated, which increases the number of processing steps and also causes problems in that the strength is inferior.

The present invention has been made in view of these points, and an object of the present invention is to provide a composite magnetic head that can reduce the number of coil turns and simplify the slider shape.

[Structure of the Invention] (Means for Solving the Problems) In order to achieve the above object, the present invention provides a method in which a pair of cores, one of which has a winding window formed therein, are joined through a magnetic gap. In a magnetic head comprising a plurality of head core blocks each having a plurality of head core blocks, the adjacent head core blocks being joined by a bonding glass, a second winding window is formed at a position facing the winding window of the bonding glass. A coil is wound around the core through these winding windows.

(Function) According to the above configuration, it is possible to wind the coil around the core on the side where the winding window is not formed among the cores that make up the head core block, and the magnetic head can be wound without increasing the number of turns of the coil. The recording and playback output can be increased. In addition, by appropriately selecting the winding position of the coil relative to the core, the shape of the slider can be simplified when bonding the slider to both sides of the head core block, and the strength of the slider can be improved. .

(Embodiment) An embodiment of the magnetic head according to the present invention will be described below with reference to the drawings.

An embodiment of the present invention is shown in FIGS. 1 and 2. FIG.

In these figures, the same or equivalent parts as those of the conventional example shown in FIGS. 8 and 9 are denoted by the same reference numerals, and the explanation thereof will be omitted. The feature of this embodiment is that second winding windows 1a and 5a formed in the first cores 1 and 5 of the bonded glass 8 are located opposite to each other through the second core 2.
This is because a winding window 14 is provided. and coils 9, 10
are wound on the second core 2.6 through the first and second winding windows 1a, 5a and 14, respectively;
Portions 9b and 10b wound around the first cores 1 and 5 below the first winding windows 1a and 5a are connected to each other.

In addition, sliders 151 are bonded to both sides of the magnetic head 11.
As shown in FIG. 2, the shape of numeral 6 is a portal shape in which the portion around which the coils 9 and 10 are wound is cut out.

The head core block composed of the first core 1 and the second core 2 becomes the R/W head 4a, and the head core block composed of the first core 5 and the second core 6 becomes the ERS head. It becomes 4b.

Next, an example of a method for manufacturing the magnetic head 11 according to this embodiment will be described with reference to FIGS. 3 to 6.

Block 17 of first core 1 in which winding window 17a is formed
and the block 18 of the second core 2 in the magnetic gap 19
The R/W head single block 20 is made by joining by a known method. In the first step shown in FIG. 3, the bonding surface 18a of the block 18 is made of a material having low affinity for bonding glass, such as AI, with a thickness of several μm.
The first film 21 having a thickness of approximately m is formed using a thin film technique. Roughly on this thin film 21, a second film 22 made of a material forming a nonmagnetic separation layer, such as ZrO2, is formed. Then the fourth
In the second step shown in the figure, a groove 23 is formed by machining or photoetching in a portion of the second thin film 22 facing the winding window 17a, and a groove 23 is formed on the surface of the first thin film 21 below. expose. Next, in the third step shown in FIG. 5, the two R
The grooves 23a and 23b of the /W head single block 24a and the ER3 head single block 24b are opposed to each other. At this time, a second thin film 22 and a second thin film 21 are formed at a position different from these grooves 23a and 23b by penetrating through the second thin film 22 and the first thin film 21.
Glass arrangement grooves 25a and 25b reaching the block 18 are formed in advance. And these glass arrangement grooves 25a, 2
A low melting point glass material 26 is placed on each of the two head blocks 5b, and heated and melted to bond the two head single blocks 24a and 24b together. FIG. 5 shows a case where two winding windows 17a are formed in each of the head single blocks 24a and 24b in the longitudinal direction.

Next, in a fourth step shown in FIG. 6, the bonded single head blocks 24a and 24b are cut at the center in the longitudinal direction and sliced to a predetermined thickness to form one composite helad core 2.
7 is obtained. Since the first "a" film 21, which has a low affinity for bonding glass, is exposed on the bottom surfaces of the grooves 23a and 23b, the grooves 23a.

The glass material 26 is not attached to 23b, and the second winding window 14
is formed. The magnetic head 11 is obtained by winding the coils 9 and 10 around the thus manufactured composite herad core 27 as shown in FIG.

According to this embodiment, the core 2 in which the winding window is not formed,
Since the coils 9a and ioa are wound around the magnetic heads 6 and 6, respectively, the recording and reproducing output of the magnetic head 11 can be increased. However, when winding the coils 9a and 10a around the cores 2 and 6, it is difficult to wind the coils with a large number of turns due to dimensional constraints. , 5a are wound with coils 9b and 10b to compensate for the shortage. In this way, the recording and reproducing output of the magnetic head 11 can be increased even with the same number of turns of the coil. Further, the sliders 15 and 16 have a gate-like shape, which is simple and easy to process. Moreover, slider 15
．． 16 strength is also improved.

In the above embodiment, the R/W head 4a and the ERS head 4b
Although the composite magnetic head 11 consisting of
The magnetic head according to the present invention is not limited to this, but for example, as shown in FIG. 7, a magnetic head 30.
The same effect can be obtained even when applied to a W azimuth magnetic head 33 formed by bonding 31 through a bonding glass 32.

[Effects of the Invention] As described above, according to the present invention, a winding window is formed in the bonded glass that joins a plurality of head core blocks of a composite magnetic head, and the coil is wound therein, so that the number of turns of the coil is reduced. This can improve the recording and reproducing output of the magnetic head.

[Brief explanation of the drawing]

FIG. 1 is a plan view showing an embodiment of the magnetic head according to the present invention, FIG. 2 is a perspective view showing a state in which a slider is joined to the magnetic head shown in FIG. 1, and FIGS. A perspective view and a plan view showing an example of a method for manufacturing a magnetic head according to an embodiment, FIG. 7 is a perspective view showing an embodiment of the present invention, and FIGS. 8 and 9 are plan views showing a conventional magnetic head. FIG. 2 is a diagram and a perspective view. 1.2, 5.6...Core 1a, 5a...First winding window 3.7...Magnetic gap 4a...R/W head 4b...ERS head (head core block) 8...
・Bonded glass 9.10...Coil 11...Magnetic head 14...Second winding window Agent Patent attorney Noriyuki Chika Yudo Hiroshi Uji 3, ρ to hoe, Sako Yfu 7th Figure 1 Figure 3 Figure 4 Figure 9 Figure 5a Figure 5 Figure 6

Claims (1)

[Claims] In a magnetic head comprising a plurality of head core blocks in which a pair of cores each having a winding window formed in one core are bonded through a magnetic gap, and in which adjacent head core blocks are bonded by a bonding glass. A magnetic head, characterized in that a second winding window is formed in the bonded glass at a position opposite to the winding window, and a coil is wound around the core through these winding windows.