JPH11273962A - High-voltage transformer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a high-voltage transformer which is without having to weld an iron core and easy to disassemble. SOLUTION: A high-voltage transformer, provided with an iron core 2 formed by overlapping a number of Si-steel plates and a winding 6 housed therein so as to penetrate the iron core 2, is provided with plate springs 4 sandwiching and securing the overlapped Si steep plates constituting the iron core 2. Furthermore, the plate spring 4 is provided with a retaining part for retaining the iron core 2 from four sides, and its thickness is set least 2 mm or more. As a result, the high-voltage transformer 1 can be disassembled easily by removing the plate springs 4.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] 1. Field of the Invention [0002] The present invention relates to a high voltage transformer for use in a microwave oven or the like according to the present invention, and more particularly, to an assembling structure of a high voltage transformer.

[0002]

2. Description of the Related Art A high-voltage transformer 10 used in a conventional microwave oven will be described. As shown in FIG. 3, the high-pressure transformer 10 is configured such that a plurality of silicon steel plates are overlapped and their side surfaces are welded to form a welded portion 3 and integrated to form the iron core 2. An opening is formed in the iron core 2, and the winding 6 is accommodated in the opening. The silicon steel plate maintains the strength of the iron core 2 by being welded.

FIG. 4 shows the structure of the iron core 2. Iron core 2
As described above, an E-type iron core 2a punched out of a silicon steel plate so as to have an E-shape in plan view and an I-type iron core 2b punched out of a silicon steel plate so as to have an I-shape in plan view as described above. It is composed by overlapping. Thus, the iron core 2 of the conventional high-voltage transformer has been made robust by welding.

[0004]

However, when the conventional high-frequency transformer 10 has been used for a long period of time and is recycled as a material, it is very difficult to disassemble it because the iron core 2 is welded. The robustness of the iron core 2 has been a factor of alienation of separation and decomposition.

[0005] Further, high-voltage transformers often use copper wire as the winding 6, and when the life of the product is over, it is necessary to recycle this copper as a material. Was not. In today's Japan, making this material recyclable is a social problem.

[0006] In order to facilitate the separation and disassembly of the iron core of the high-voltage transformer, it is necessary to adopt a structure in which welding is stopped. For this reason, as an alternative to welding, there is a structure in which screws and nuts are used, but this has been conventionally used. However, the structure in which the screw and the nut are used requires time to remove the screw, and the disassembly cannot be said to be easy.

SUMMARY OF THE INVENTION An object of the present invention is to provide a high-voltage transformer that can be easily disassembled without stopping welding of the iron core and without stopping with a screw and a nut.

[0008]

Means for Solving the Problems The high voltage transformer of the present invention solves the above-mentioned problems, and the invention according to claim 1 comprises an iron core formed by stacking a large number of silicon steel sheets, and the iron core. And a winding housed so as to penetrate the steel core, comprising a resilient holding member for sandwiching and fixing a number of superposed silicon steel plates constituting the iron core.

The invention according to claim 2 is the high-voltage transformer according to claim 1, wherein the elastic holding member includes a holding portion for holding the iron core from four side surfaces.

The invention according to claim 3 is the high voltage transformer according to claim 1 or 2, wherein the elastic holding member is formed by bending a leaf spring having a plate thickness of 2 mm or more.

According to a fourth aspect of the present invention, there is provided the high-voltage transformer according to any one of the first to third aspects, wherein the elastic holding members are provided on the side faces of the iron core.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a high-voltage transformer according to the present invention will be described with reference to FIGS. The same parts as those in the conventional example are denoted by the same reference numerals.

FIG. 1 is a perspective view of a high-voltage transformer according to the present embodiment, and FIG. 2 is a perspective view of a leaf spring used in the present embodiment.

In FIG. 1, a high voltage transformer 1 includes an iron core 2
Are held from both sides by leaf springs 4 (elastic holding members).

The iron core 2 is formed by laminating one hundred or more tens of silicon steel sheets having a thickness of 0.5 mm.
Before the E-shaped iron core 2a and the I-shaped iron core 2b are combined, the winding 6 is inserted into the E-shaped iron core 2a. The windings 6 are formed by aligning and stacking enameled wires, impregnated with varnish, and ensuring mechanical strength.

The E-shaped iron core 2a and the I-shaped iron core 2b are combined with the windings 6 to form the iron core 2. The leaf springs 4 are mounted on both sides of the iron core 2 so as to sandwich the silicon steel plate. . The high voltage transformer 1 assembled in this manner is shown in FIG.

As shown in FIG. 2, the leaf spring 4 has a substantially octagonal flat portion and four tongue portions 5 formed on the outer periphery of the flat portion. It is bent at a substantially right angle with respect to the plane portion or at an angle slightly smaller than 90 °.
The iron core 2 is pressed from the four side surfaces by the four tongue portions 5.

As a result, the iron core 2 formed by stacking silicon steel plates can be reliably pressed down, and the E-type iron core 2a and the I-type iron core 2b can be prevented from coming off. The same strength as in the case of welding can be secured.

Since the leaf spring 4 is required to have elasticity, it is necessary to bend and use a metal plate having a thickness of at least 2 mm or more.

With the fixing structure using the leaf spring 4 as described above, the high-voltage transformer 1 can be easily separated, and the disassembly can be easily performed simply by removing the leaf spring 4. In particular, high-voltage transformers used for microwave ovens are large and heavy (3 kg or more), and there are also a large number of silicon steel sheets constituting the iron core and a large amount of copper wires constituting the windings. It is very effective from the viewpoint of recycling.

[0021]

According to the first aspect of the present invention, the high voltage transformer can be easily disassembled simply by removing the elastic holding member.

According to the second aspect of the present invention, the iron core can be reliably held without the silicon steel plate being displaced.

According to the third aspect of the invention, the iron core can be held with a sufficient force even with a heavy high-voltage transformer used for a microwave oven or the like.

According to the fourth aspect of the present invention, by holding the facing surfaces, even with a heavy high-voltage transformer used in a microwave oven or the like, the iron core can be securely held without the silicon steel plate being displaced. Can be.

[Brief description of the drawings]

FIG. 1 is a perspective view of a high-voltage transformer according to an embodiment of the present invention.

FIG. 2 is a perspective view of a leaf spring used in the embodiment of the present invention.

FIG. 3 is a perspective view of a conventional high-voltage transformer.

FIG. 4 is a perspective view of an iron core used for a conventional high-voltage transformer.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 High-voltage transformer 2 Iron core 3 Welding part 4 Leaf spring 5 Tongue side part 5a Contact part 6 Winding

Claims (4)

[Claims] 1. A high-voltage transformer having an iron core formed by stacking a large number of silicon steel plates and a winding housed so as to penetrate the iron core, wherein the superposed multiplicity forming the iron core is provided. A high-voltage transformer comprising an elastic holding member for sandwiching and fixing the silicon steel plate of the above. 2. The elastic holding member includes a holding portion for holding the iron core from four side surfaces.
The high voltage transformer as described. 3. The high-voltage transformer according to claim 1, wherein the elastic holding member is formed by bending a leaf spring having a plate thickness of 2 mm or more. 4. The high-voltage transformer according to claim 1, wherein the elastic holding members are provided on side faces of the iron core, respectively.