JPS5843217Y2 - Shielding plate for transformer - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a shielding plate for a transformer manufactured by high-frequency heating.

FIG. 1 is a perspective view showing a conventional shielding plate for a transformer.

1 and 2 in FIG. 1 are insulators that absorb high frequency waves and generate heat.

3 is a metal plate for electrostatic shielding, and 4 is a conductive wire drawn out from a part of the metal plate 3.

These insulators 1 and 2, metal plate 3, and conducting wire 4 together form a transformer shielding plate 5.

Further, FIG. 2 shows a conventionally used metal plate 3 with conducting wires.

The above-described transformer shielding plate 5 is subjected to a high-frequency electromagnetic field in a high-frequency oven and subjected to high-frequency heat treatment.

The processing here is for the purpose of adhesion.

Now, if a high-frequency electric field is applied to the transformer shielding plate 5, the insulators 1 and 2 and the adhesive (not shown) between these insulators 1 and 2 and the metal plate 3 will generate heat depending on the electric field strength. When the adhesive reaches a curing temperature, the insulator 1.2 and the metal plate 3 are bonded together.

At this time, as shown in FIG. 2, the conductive wire 4 is made of, for example, a stranded wire in order to have flexibility, and the lead-out portion from the metal plate 3 is unraveled and soldered to the metal plate 3 to electrically connect it. It is connected to the.

However, because the conductor wires near the lead-out part remain unraveled, the high-frequency electric field is disturbed, and the nearby insulators 1 and 2 and adhesive are heated abnormally, causing them to burn before the bonding of other parts is completed. Put it away.

This invention was conceived in view of the above points, and aims to provide a shielding plate for a transformer that is not suitable for high-frequency heat treatment but can be made suitable for high-frequency heat treatment.

Examples of the transformer shielding plate of this invention will be described below with reference to the drawings.

FIG. 3 shows a metal plate with conductive wires applied to one embodiment.

The reference numeral 3 in the figure is a metal plate to which a conductor wire 4 is attached, and the part where the wires are loosened near the conductor connection part is hardened with molten metal 6, eliminating the gap between the wires. There is.

In this way, by eliminating the gaps between the wires,
During high-frequency heat treatment, there are no high-frequency disturbances such as concentration of high-frequency electric fields in narrow gaps or discharge between wires or between wires and metal bodies, causing abnormal heating of nearby insulation v01, 2 and adhesives. Therefore, there is no scorching, and the adhesion near the conductor connection part is completed almost at the same time as other parts.

According to experiments conducted by the inventors of this invention, a transformer shielding plate sandwiching the metal plate 3 shown in FIG.
When heated by high-frequency waves of Hz, adhesion was completed and no scorching occurred when 5KW of high-frequency power was applied for 12 minutes. When the board was heated under the same conditions, the insulation near the conductor connections was scorched before other parts were completely bonded.

As described above, according to the transformer shielding plate of this invention, in a transformer shielding plate in which both sides of a metal plate with conductors are sandwiched between insulators, the vicinity of the conductor connection part of the metal plate is hardened with molten metal. Therefore, when performing high-frequency heat treatment, it is possible to achieve the effect that the heat treatment can be performed without causing disturbance of the high-frequency electric field and without inconveniences such as burning of insulators.

[Brief explanation of the drawing]

Figure 1 is a perspective view of a conventional transformer shielding plate, and Figure 2 is a perspective view of a conventional transformer shielding plate.
FIG. 3 is a plan view of a metal plate with conducting wires used in the transformer shielding plate of the present invention, and FIG. 1.2...Insulator, 3...Metal plate, 4
... Conductor wire, 5 ... Transformer shielding plate, 6
・・・・・・Molten metal. Note that the same reference numerals in the figures indicate the same or corresponding parts.

Claims (1)

[Scope of utility model registration request] A transformer shielding plate comprising two or more insulators that generate heat by absorbing high frequencies, and a metal plate sandwiched between these insulators and connected to a conductor made of a large number of strands, the metal A shielding plate for a transformer, characterized in that a large number of loosened strands near the connecting portion of the conductive wire connected to the plate are solidified together with molten metal to eliminate gaps between the strands.