JP2001202602A - Core supporting member and magnetic head - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a core support which can be used commonly to hold a magnetic core in plural kinds of magnetic heads whose specifications of the width of recording track sizes differ. SOLUTION: Two core grooves 5a, 5b which fit the magnetic core 1 equipped with a coil bobbin 2 are formed at the position where the surface and the rear side surface face each other. In core grooves 5a and 5b, the width sizes a and b of the direction corresponding to the track width direction of the magnetic core 1 differ. By using core grooves 5a and 5b alternatively, two kinds of magnetic cores 1 whose width sizes of the track width direction are a and b are fitted and held alternatively.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic head for magnetically recording or reproducing information by bringing a magnetic core wound with a coil into sliding contact with a magnetic recording medium, and a component member thereof. The present invention relates to a core support member that fits and holds the magnetic core.

[0002]

2. Description of the Related Art Conventionally, in a magnetic head, as shown in FIG. 8, a magnetic core 1 on which a coil bobbin 2 is mounted is fitted into a core groove 5a formed in a core support member (hereinafter referred to as a core support) 5. A configuration is employed in which the magnetic core 1 is held, and a magnetic core unit 8 including the magnetic core 1, the coil bobbin 2, and the core support 5 is fixed in a magnetic shield case or an external structure of a magnetic head (not shown). In this case, the width dimension a in the core groove 5a of the core support 5 in the direction corresponding to the track width direction of the magnetic core 1 is the width dimension in the track width direction of the magnetic core 1, that is, the dimension corresponding to the track width dimension of the magnetic head. It has become. Therefore, every time the track width of the magnetic head is different, a dedicated core support is required.

[0003]

However, since the core support needs to have precise dimensional accuracy in order to fit and hold the magnetic core and fix it at a predetermined position in the shield case, the core support is made of a metal die-cast. It is produced by pressing or machining. Therefore, if a new dedicated core support is newly created every time the specifications of the track width of the magnetic head are different, there is a problem that extremely high costs such as mold manufacturing costs and machining costs are required.

It is an object of the present invention to provide a core support which can be commonly used for holding a magnetic core in a plurality of types of magnetic heads having different track width specifications, and a magnetic head using the same.

[0005]

According to the present invention, there is provided a magnetic recording medium comprising: a magnetic core having a coil wound thereon; A core support member for fitting and holding the magnetic core, the core groove for fitting the magnetic core, and a width in a direction corresponding to a track width direction of the magnetic core. A plurality of core grooves having different dimensions are formed, and a plurality of types of magnetic cores having different width dimensions in the track width direction can be selectively fitted and held by alternatively using the plurality of core grooves. The above configuration was adopted.

The plurality of core grooves are formed, for example, at one surface of the core support member and at positions facing each other on a surface facing the one surface, or at one surface of the core support member. It is assumed that they are formed so as to communicate with each other, or are formed at positions that are point-symmetric with each other on one surface of the core support member.

According to the present invention, there is provided the core support member according to the present invention, and a magnetic core wound with a coil, wherein the magnetic core is provided in one of a plurality of core grooves of the core support member. The configuration of the magnetic head fitted and held was adopted.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a magnetic head using a core support according to the present invention will be described below with reference to the drawings. Here, first to third embodiments will be described. First, the overall configuration of a magnetic head common to each embodiment is shown in FIG.
A description will be given with reference to a vertical side view and a cross-sectional plan view of (a) and (b).

In FIGS. 1 (a) and 1 (b), reference numeral 1 denotes a ring-shaped magnetic core. A magnetic gap G is formed by the magnetic gap material.

Reference numeral 2 denotes a coil bobbin on which a coil 3 is wound and a coil terminal 4 to which both ends of the coil 3 are connected is implanted. The coil bobbin 2 is mounted on the rear part of the magnetic core 1, and the coil 3 is wound around the magnetic core 1 via the coil bobbin 2.

Reference numeral 5 denotes a core support that fits and holds the magnetic core 1 on which the coil bobbin 2 is mounted. The details of the structure will be described later, but are different in the first to third embodiments.

A unit formed by assembling the magnetic core 1, the coil bobbin 2 and the core support 5 is hereinafter referred to as a magnetic core unit, and is denoted by reference numeral 8.

Reference numeral 6 denotes a shield case which accommodates other components of the magnetic head and performs magnetic shielding. The front surface (the surface on the right side in the figure) of the shield case 6 is a sliding surface with which a magnetic recording medium (not shown) comes into sliding contact during recording or reproduction by the present magnetic head. Are formed. The magnetic core unit 8 is inserted into the shield case 6, and the magnetic core 1 is disposed so that the front end surface of the magnetic core 1 where the magnetic gap G is provided is exposed to the opening 6a.

Reference numeral 7 denotes a screw for pressing and fixing the magnetic core unit 8 inserted into the shield case 6 to one inner surface of the case 6.

Next, first to third embodiments of the core support 5 used in the magnetic head having the above configuration will be described.

[First Embodiment] A core support 5 according to a first embodiment will be described with reference to FIGS.

As shown in FIG. 2, the core support 5 of the present embodiment is formed in a substantially rectangular flat plate shape, and has opposing front and back surfaces (upper and lower surfaces in FIG. 2). Are formed with rectangular core grooves 5a and 5b into which the magnetic core 1 is fitted. The core grooves 5a and 5b have different widths a and b in a direction corresponding to the track width direction of the magnetic core 1 fitted therein, and the width a of the core groove 5a is larger than the width b of the core groove 5b. It is getting bigger.

Then, as shown in FIG. 2, the magnetic core 1 having the width dimension a in the track width direction can be fitted and held in the core groove 5a of the core support 5, and as shown in FIG. Alternatively, the core support 5 may be used upside down and the magnetic core 1 having the width dimension b in the track width direction may be fitted and held in the core groove 5b.

That is, two types of magnetic cores 1 having different widths in the track width direction can be alternatively fitted and held by using the two core grooves 5a and 5b alternatively.
That is, the core support 5 can be commonly used for holding the magnetic cores in two types of magnetic heads having different track width dimensions. In other words, two types of magnetic heads having different track width dimensions can be manufactured using this one type of core support 5.

Therefore, by using the core support according to the present embodiment, it is possible to reduce the initial investment such as the die cost in the manufacture of the magnetic head and reduce the cost by increasing the product variations. Furthermore, 1
By using two types of core supports for manufacturing two types of magnetic heads, it is possible to expect a total cost reduction by increasing the total production number of one type of core support and simplifying parts management.

[Second Embodiment] Next, a core support 5 according to a second embodiment will be described with reference to FIGS.

As shown in FIGS. 4 and 5, the core support 5 of the present embodiment is formed in a substantially rectangular flat plate shape. The width dimension in the direction corresponding to the track width direction is a,
As shown by b, two different core grooves 5a and 5b communicate with each other and are formed in a convex shape as a whole.

Then, as shown in FIG. 4, the magnetic core 1 having the width dimension a in the track width direction can be fitted and held in the core groove 5a of the core support 5, and as shown in FIG. Alternatively, the magnetic core 1 having the width dimension b in the track width direction can be fitted and held in the core groove 5b. That is, similarly to the first embodiment, two types of magnetic cores 1 having different widths in the track width direction are selectively fitted and held by using the two core grooves 5a and 5b alternatively. And a similar effect can be obtained.

Further, as a modification of this embodiment, one or more core grooves are formed on the lower surface in FIGS. 4 and 5 of the core support 5, and the core grooves correspond to the track width direction of the magnetic core. The width dimension in the direction is the width dimension a of the core grooves 5a and 5b,
If it is different from b, it can be used in common for holding the magnetic cores in three or more types of magnetic heads having different track width dimensions.

[Third Embodiment] Next, a core support 5 according to a third embodiment will be described with reference to FIGS.

As shown in FIGS. 6 and 7, the core support 5 of the present embodiment is formed in a substantially rectangular flat plate shape. The width dimension in the direction corresponding to the track width direction is a,
As shown by b, two different core grooves 5a and 5b are formed at positions where they are point-symmetric with each other, that is, at positions where the core supports 5 overlap by rotating the core support 5 by 180 ° in a plane parallel to the upper surface in the figure. .

As shown in FIG. 6, the magnetic core 1 having the width a in the track width direction can be fitted and held in the core groove 5a of the core support 5, and as shown in FIG. The magnetic core 1 used by rotating the core support 5 by 180 ° and having a width dimension b in the track width direction.
Can be fitted and held in the core groove 5b. That is, as in the first and second embodiments, the two core grooves 5
By using a and 5b alternatively, two types of magnetic cores 1 having different widths in the track width direction can be alternatively fitted and held, and the same effect can be obtained.

Further, as a modified example of this embodiment, the second
As in the modification of the embodiment, the core support 5 shown in FIG.
7, one or more core grooves are also formed on the lower surface, and the width of the core groove in the direction corresponding to the track width direction of the magnetic core is different from the width a, b of the core grooves 5a, 5b. Then, similarly, the magnetic head can be commonly used for holding the magnetic cores in three or more types of magnetic heads having different track width specifications.

[0029]

As is apparent from the above description, according to the present invention, one type of core support can be commonly used for holding the magnetic cores in a plurality of types of magnetic heads having different track width specifications. Thus, a plurality of types of magnetic heads having different track width dimensions can be manufactured using one type of core support. Further, an excellent effect that significant cost reduction of the core support and the magnetic head can be achieved is obtained.

[Brief description of the drawings]

FIGS. 1 (a) and 1 (b) are a longitudinal side view and a cross-sectional plan view, respectively, showing the entire configuration of a magnetic head common to the first to third embodiments of the present invention.

FIG. 2 is a perspective view showing a structure of a core support of the magnetic head according to the first embodiment of the present invention and a state in which a magnetic core having a width dimension a in a track width direction is fitted to the core support;

FIG. 3 is a perspective view showing a structure of a core support in the embodiment and a state in which a magnetic core having a width dimension b in a track width direction is fitted.

FIG. 4 is a perspective view showing a structure of a core support according to a second embodiment and a state of fitting a magnetic core having a width dimension a.

FIG. 5 is a perspective view showing a structure of the core support in the embodiment and a state in which a magnetic core having a width dimension b is fitted.

FIG. 6 is a perspective view showing a structure of a core support according to a third embodiment and a state of fitting a magnetic core having a width dimension a.

FIG. 7 is a perspective view showing a structure of the core support and a state in which a magnetic core having a width b is fitted in the embodiment.

FIG. 8 is a perspective view showing a structure of a core support of a conventional magnetic head and a state in which a magnetic core is fitted thereto.

[Explanation of symbols]

 Reference Signs List 1 magnetic core 2 coil bobbin 3 coil 4 coil terminal 5 core support 5a, 5b core groove 6 shield case 7 screw for fixing magnetic core unit 8 magnetic core unit

Claims (5)

[Claims] 1. A component of a magnetic head for performing magnetic recording or reproduction of information by bringing a magnetic core wound with a coil into sliding contact with a magnetic recording medium, wherein the magnetic core is fitted. In the core support member to be held, a plurality of core grooves, each having a different width dimension in a direction corresponding to a track width direction of the magnetic core, are formed. A core support member characterized in that a plurality of types of magnetic cores having different widths in the track width direction can be selectively fitted and held by using the magnetic cores as an alternative. 2. The core according to claim 1, wherein the plurality of core grooves are formed at one surface of the core support member and at a position facing each other on a surface facing the one surface. Support members. 3. The core support member according to claim 1, wherein the plurality of core grooves are formed to communicate with each other on one surface of the core support member. 4. The core support member according to claim 1, wherein the plurality of core grooves are formed at positions symmetrical with respect to each other on one surface of the core support member. 5. A core support member according to claim 1, further comprising: a magnetic core wound with a coil, wherein the magnetic core is formed of a plurality of core grooves of the core support member. A magnetic head fitted and held in one of the above.