JPS5816527B2 - magnetic head - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION In the present invention, cores are provided to form a magnetic circuit by closely contacting the top and bottom of a sealing plate whose top and bottom are covered with non-magnetic plates, and in this state, cores are cut from the front surface to form a spacer. This invention relates to a multi-type magnetic head in which a desired magnetic gap is created by creating an insertion groove and then inserting a spacer into the groove.

In forming such a head, the shield plate 10
0, the dotted line portion 101 in FIG. 1 is cut when forming the spacer insertion groove, and the spacer is sandwiched and fixed under pressure in the directions of arrows a and b.

However, if only the cutting is done when forming the spacer insertion groove, after the pressure in the directions of arrows a and b is released, there is a force that returns in the direction opposite to arrows a and b due to the elasticity of the sea I lead plate itself. The above fixation is not reliable.

Therefore, if the sealing board 100 is provided with a cut groove 102 during molding, the returning force can be reduced, but this cut groove 10
2 has the disadvantage of reducing the shielding effect.

The present invention provides a magnetic head that eliminates this drawback, and will be described below with reference to an embodiment shown in FIG.

Here, Figure 2 shows a magnetic plate 1 and a non-magnetic plate 2 covering the top and bottom of the magnetic plate 1.
This figure mainly shows the relationship between a shield plate 3 consisting of a shield plate 3 and a core 6 for forming a magnetic circuit formed with cores 4 and 5 on its upper surface.

In addition, when forming the main reticle channel I head, it goes without saying that they are provided above and below the seal lead board 3, but for ease of explanation, the relationship between the cores on the bottom surface of the seal lead board 3 is omitted. There is.

In FIG. 2A, the magnetic plate 1 has a U-shaped kerf 11, and the non-magnetic plate 2 has a kerf 22 similar to the kerf 11 and a winding hole 21 formed at the same time.

7 is a side core made of a non-magnetic material.

In addition, as shown in the opening of the same figure, one magnetic circuit configuration core 6 is made by laminating two cores 4 and three cores 5, and due to the difference in the shape of both cores 4 and 5, As shown in the figure, the end portion 61 protrudes, and this portion
It is in a state of floating light.

In this configuration, when the spacer insertion groove 9 is formed to sandwich the spacer 8 as shown in FIG. It becomes a Y-shaped groove.

Therefore, when pressure is applied in the direction of the arrow C1d to sandwich the spacer 8, the tip of the shield plate 3 moves with the point a as the fulcrum.

Next, the relationship between the kerfs 11.22 and the windings will be explained.

Reference numeral 10 shown in FIG. 2E is a part of the back core, including a bank core 31 and a portion 33 to which the winding 32 is applied, as also shown in FIG.
．． Terminal 34 and end portion 61 of core 6 for magnetic circuit configuration
A bobbin 36 has a hole 35 into which the terminal 34 is attached, and a step 37 is provided on a part of the bobbin 36 to expose a part of the base side of the terminal 34.
and the terminal 34 can be electrically coupled to each other.

The relationship between the windings 32 and the holes 21 is designed to allow for a large number of windings as shown in FIG.

Furthermore, the relationship between the winding 32 and the cut grooves 11.22 provided in the shield plate 3 is such that the cut grooves 11.22 are provided so that the winding 32 is exposed, so that the shielding effect is not impaired.

As explained above from the aspect of manufacturing process, according to the present invention, it is possible to contribute to holding the spacer 8 without impairing the shielding effect of the shield plate 3.

Further, since the back core portion 10 is moved along the sea I lead plate 3 to connect the one magnetic circuit forming core 6 and the back core 31, assembly is easy.

In addition, the terminal 34 of the winding 32 is located at the stepped portion 31 of the bobbin 36.
This joint part does not protrude as compared to other parts, and the upper surface of the bobbin 36 can be easily used to determine the distance between the bobbin 36 and the shield case.

[Brief explanation of drawings]

FIG. 1 is a perspective view of a magnetic head according to an embodiment of the present invention. FIG. 2 is a perspective view showing a manufacturing process for explaining a magnetic head according to an embodiment of the present invention. FIGS. FIG. 2 is a perspective view and a sectional view of a main part of one used component in the state shown in FIG. 3... Shield plate, 6... Core for magnetic circuit configuration, 11.22... Cut groove.

Claims (1)

[Claims] 1. The outer surface is made of a non-magnetic layer, and the cores for configuring the magnetic circuit are closely attached to the upper and lower sides, and the winding part is avoided in the sea I lead board in which a groove for inserting a spacer is formed during the manufacturing process, and the above-mentioned groove is A magnetic head characterized in that a U-shaped groove is provided to form a Y-shaped groove. 2. The magnetic head according to claim 1, wherein the core for forming the magnetic circuit has a thin end portion and is spaced apart from the shield plate, making it easy to connect the back core. . 3 A bobbin with a terminal is attached to the bank core,
2. The magnetic head according to claim 1, wherein a part of the bobbin is provided with a stepped part that exposes a part of the terminal and electrically couples the terminal to the winding.