JPH0419768Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a core used in a transformer for a pincushion.

(Conventional technology and its problems) Conventionally, as a transformer core for pink union,
An EI core as shown in Figure 4 is used.
The characteristics required for this type of transformer are the
As shown in the figure, it is desirable that the inductance L _v changes as linearly as possible with respect to the vertical deflection current i _v . However, normally, due to the saturation characteristics of the core, it changes in a curved manner as shown in FIG. In the figure, , depends on the magnitude of horizontal deflection current _iH . Further, as shown in FIG. 5, a spacer 13 of an appropriate thickness is inserted between the E-type core 11 and the I-type core 12 to provide a gap, so that an appropriate inductance value can be obtained. .

The present invention provides a transformer core for a pincushion in which linear characteristics can be obtained without using such a spacer.

(Means for solving the problem) In order to achieve the above purpose, in the present invention, I
The mold core is configured so that the cross section is approximately L-shaped,
When the EI cores are combined, the E-type core and I-type core are connected at the two corners of the triangle so that a substantially triangular gap is formed at the tip of the leg of the E-type core when viewed from the side of the core. At least one of the contact portions is in contact with the other in a linear manner.

(Function) According to the above configuration, a required gap is formed between the EI cores, so that a sudden saturation state does not occur, and therefore, a transformer for a pink union with excellent linearity can be obtained.

(Example) Examples will be described in detail below based on the drawings. FIG. 1 shows an embodiment of the present invention, in which 1 is an E-type core and 2 is an I-type core. I-type core 2 is
Its cross section is substantially L-shaped, and when combined with the E-shaped core 1, a gap 3 having a substantially triangular cross-sectional shape is formed between the tip of the leg of the E-shaped core 1. At this time, the E-type core 1 and the I-type core 2 are in contact with each other at two corners of a triangle, and both of the contact portions are in contact with each other in a linear manner.

In this embodiment configured in this way, a gap 3 is created between the EI cores, and the E-type core and I-type core touch each other in a linear manner on both sides of the gap 3, so there is no need to insert a spacer as in the conventional case. When a transformer is formed, it does not reach a saturation state, and the inductance with respect to the vertical deflection current changes linearly.

FIG. 2 shows another embodiment of the present invention, in which the tip of the leg of the E-shaped core 4 is configured to be oblique, and the cross section is such that the outer surface coincides with the outer surface of the leg. is a combination of approximately L-shaped I-type cores 5. In this case as well, a gap 6 having a substantially triangular cross section is formed, and the E-type core 4 and the I-type core 5 are in contact with each other at two corners of the triangle, and at least one of the contact portions is in contact with each other in a linear manner. It's getting old. Moreover, it becomes easy to fasten the EI core.

Figures 3a and 3b show still other embodiments of the present invention, and Figure 3a shows a cut in which the inside tips of both legs of the E-shaped core 7 are partially cut obliquely. In addition, the one in FIG. 3b has cut portions 8a formed by partially cutting diagonally inside the tips of both side leg portions, as well as cut portions 8a on both sides of the central leg portion. It was formed. Incidentally, each of the I-shaped cores 9 has a substantially L-shaped cross section, as shown in FIG. 3c.
With this configuration, the contact area between the EI cores can be reduced, and the required linear characteristics can be easily obtained.

(Effects of the invention) As explained above, according to the invention, a required gap can be formed without inserting a spacer as in the conventional case, and an E-type core and an I-type core can be formed on both sides of the gap. are in contact with each other, and at least one of the contact portions is in contact with each other in a linear manner, which has the effect of easily obtaining linear characteristics.

[Brief explanation of drawings]

FIG. 1 is a perspective view of one embodiment of the present invention, FIG. 2 is a sectional view of a main part of another embodiment of the present invention, and FIG. 3 is a diagram showing still another embodiment of the present invention. FIG. 4 is a diagram showing a conventional example, FIG. 5 is an exploded view of the portion shown in FIG. 4, FIG. 6 is a diagram showing desirable characteristics of a transformer for a pincushion, and FIG. 7 is a diagram showing conventional characteristics. 1, 4, 7, 8... E type core, 2, 5, 9...
I-type core, 3, 6... air gap, 7a, 8a... cut portion.

Claims (1)

[Scope of utility model registration request] In the EI type core, the I type core is configured so that the cross section is approximately L-shaped, and when the E type core and I type core are combined, there is approximately a A transformer core for a pincushion, characterized in that an E-shaped core and an I-shaped core are in contact with each other at two corners of the triangle so that a triangular gap is formed, and at least one of the contact parts is linearly in contact with each other.