JPS61198409A - Manufacture of magnetic head - Google Patents

Abstract

PURPOSE:To attain gap in-line with high accuracy by pressing a part of butted planes exposed on a magnetic gap of plural magnetic cores into contact onto one plane. CONSTITUTION:Core halves 1, 1' are butted and joined via a magnetic gap G and a winding bobbin is fitted to the rear part of the core halves 1, 1' in this case to form a magnetic core assembly. In this case, the core halves 1, 1' are formed by laminating body of high permeability magnetic sheets, the core half 1 is formed similarly as a conventional half but in the core half 1', a butted face 1' a of the tip forming the magnetic gap G is made larger than the butted plane of the core half 1 and prolonged outward the core from the magnetic gap G.

Description

Detailed Description of the Invention [Technical Field] The present invention relates to a method for manufacturing an m's head, and more particularly to a method for manufacturing a magnetic head having a plurality of magnetic cores, in which the magnetic gaps of each magnetic core are arranged in a straight line. This relates to a manufacturing method.

[Prior Art] A conventional method of manufacturing this type of magnetic head will be described with reference to FIGS. 1 to 3.

In FIG. 1, reference numerals 1 and 1 indicate core halves constituting the magnetic core, respectively. Further, the reference numeral 2 indicates a winding bobbin, around which is wound a winding 3 through which recording and reproduction signals are passed, and a connecting terminal 4 to which the terminal of this winding 3 is connected.
4 has been planted.

First, the core halves 1, 1 are fitted with the winding pobbin 2 at the rear, and abutted against each other with a magnetic gap G between the abutting surfaces of the tips, and are joined together to form a magnetic core, which is shown as a whole by reference numeral 5 in FIG. Obtain an assembled unit.

Next, as shown in FIG. 2, a plurality of the magnetic core assemblies 5, in this case two, are assembled into the core support 6 of the holding member.

In this case, the core support 6 is formed into a substantially rectangular plate shape bent into an abbreviated shape, and has grooves 6a, 6a on the top and bottom of one side surface.
The tip of the magnetic core of the magnetic core assembly unit 5.5 is fitted into the grooves 6a, 6a, and the outer surface of each core half 1 is connected to the inner surface 6b of the core support 6.
Position the single magnetic core assembly 5, 5 by bringing it into contact with the
Fix by gluing, etc.

Next, the core support 6 incorporating the magnetic core assembly unit 5
is fitted into the shield case 7 shown in FIG. Part 7b.

Magnetic core assembly unit 5 and core support 6 facing 7b
position and secure the assembly.

Thereafter, the entire sliding surface 7a, including the tip end surface of the magnetic core, is subjected to a final grinding process to complete the magnetic head.

By the way, as shown by the dashed line in FIG. 3, in the completed magnetic head, the magnetic gaps G and G of the upper and lower magnetic cores are aligned in a straight line.
When positioning with respect to the core support 6, the magnetic gap G
, G are aligned in a straight line, so-called gap inline placement.

However, this gap in-line placement causes variations in the dimensions of the magnetic core, and the assembly of the magnetic core to the core support 6 is difficult.
Conventionally, there was a problem in that it was extremely difficult and required a large number of man-hours due to the overlap of errors such as dimensional variations and inclination during assembly.

[Purpose] The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide a method for manufacturing a magnetic head that allows the above-mentioned gap inline alignment to be performed easily and with high precision with fewer man-hours. .

[Structure of the Invention] In order to achieve the above object, according to the method for manufacturing a magnetic head according to the present invention, magnetic core constituent members having different sizes of abutting surfaces forming a magnetic gap are abutted and joined to each other, and the abutting surfaces are bonded together. forming a plurality of magnetic cores with a portion exposed above the magnetic gap, and positioning the magnetic gaps of the plurality of cores in a straight line by bringing the exposed surfaces of the plurality of cores above the magnetic gap into contact with one plane. A configuration with steps was adopted.

[Example] Hereinafter, an example of the present invention will be described with reference to FIGS. 4 and 5. Here, a method for manufacturing a magnetic head of the same type as the conventional example described above is used as an example, and the same or corresponding parts in FIGS. 4 and 5 are denoted by the same or similar reference numerals.

In the manufacturing process according to this embodiment, first, the core halves 1 and 1' shown in FIG. The bobbin is fitted into the rear part of the core half 1.1' to obtain a single magnetic core assembly.

In this case, the core half-hole 1.1' is formed from a laminate of high permeability magnetic thin plates, and one core half L is formed in the same manner as in the conventional example described above, but the other core half-hole 1' is formed with a magnetic gap. The abutting surface 1'a of the tip forming G is the core half 1
It is made larger than the abutting surface of and extends outward from the magnetic gap 0 portion.

Therefore, in the state where the core halves l and 1' are joined, the fourth
As shown in the figure, the upper part of the abutting surface 1'a is exposed on the magnetic gear G.

Next, as shown in FIG. 4, the single magnetic core assemblies 5', 5' obtained as described above are fitted into the grooves 6a, 6a of the core support 6 similar to the conventional one, and a jig 8 is used to create the gap. Perform inline output.

In this case, the jig 8 has a step on its upper surface, and three planes 8a and 8b that are orthogonal to each other and have high flatness.

8C, and the height of the plane 8b corresponds to a predetermined dimension between the outer surface 6C of the core support 6 and the abutting surface l'a of the core half-rest l'. Then, the outer surface 6C of the core support 6 is placed on the flat surface 8a of the jig 8, and the tip surface of the core half 1.1 of the remagnetic core is brought into contact with the flat surface 8b, and the core half 1',
By bringing the exposed portions of the abutting surfaces 1'a, 1'a of 1' into contact with the flat surface 8C without any gaps, the abutting surfaces vias a, l' can be formed without any inclination of the magnetic core assemblies 5', 5'. a is precisely aligned according to the flatness of the plane 8C, and the magnetic gaps G, G are aligned - in a straight line. Further, the tip end surface of the core half-hole 1.1 is also aligned in accordance with the flatness of the plane 8b.

After performing the gap inline alignment in this way and performing other positioning of the magnetic core assemblies 5', 5' relative to the core support 6, the magnetic core assemblies 5', 5' are fixed to the core support 6 by adhesive or the like.

Next, as in the case of the conventional example described above, assemble the magnetic core assembly 5.
The assembly of ', 5' and the core support 6 is fitted into a shield case (not shown) in the same way as in the conventional example described above, and the magnetic gap G is exposed to the opening of the sliding surface of the shield case. , a method such as positioning the entire assembly by making the portions of the core halves 1' and 1' that protrude above the magnetic gear G protrude outward from the opening, and filling the shield case with a fixing material such as resin. Fix it with.

Next, the entire sliding surface is subjected to a final grinding process to complete the magnetic head. And by this grinding, the core half-break 1
The part that protrudes outside of the shield case is removed.

As described above, according to the tree embodiment, the magnetic cores are half closed 1', 1'
The gap inline can be performed with high precision according to the flatness of the flat surface 8C by the extremely simple operation of bringing the exposed portions of the butt surfaces 1'a, 1'a into contact with the flat surface 8C of the jig 8 without any gaps. .

[Effects] As is clear from the above description, according to the present invention, high precision can be achieved through an extremely simple process of bringing a portion of the abutting surfaces exposed on the magnetic gaps of a plurality of magnetic cores into contact with one plane. The excellent effect of being able to perform gap inline is obtained.

[Brief explanation of drawings]

The conventional manufacturing method will be explained with reference to Figures 1 to 3. Therefore, Figure 1 is a perspective view of a single magnetic core assembly, Figure 2 is a perspective view of a core support incorporating a single magnetic core assembly, and Figure 2 is a perspective view of a core support incorporating a single magnetic core assembly. 3 is a front view of the magnetic recording medium sliding surface of the completed magnetic head, FIGS. 4 and 5 are detailed explanations of the present invention, FIG. 4 is a perspective view of the magnetic core, and FIG. FIG. 3 is a perspective view illustrating how a single magnetic core assembly is assembled into a core support and how gaps are inlined. 1.1'... Core half 2... Winding bobbin 5'.
・・Magnetic core assembly unit 6・Core support 8・Jigs 8a to 8C・
...Plane G...Magnetic gap Fig. 1 Fig. 2 Fig. 3 Fig. 4 Fig. 5

Claims (1)

[Claims] a step of abutting and joining magnetic core constituent members having abutting surfaces of different sizes that form a magnetic gap to form a plurality of magnetic cores with a portion of the abutting surfaces exposed above the magnetic gap; A method of manufacturing a magnetic head, comprising the step of positioning the magnetic gaps of the plurality of cores in a straight line by bringing exposed surfaces on the gaps into contact with one plane.