JPH1167548A - Core-attaching plate for transformer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a core-attaching plate to which the core of a transformer can be surely attached, in a play-free state through a small number of simple bending processes. SOLUTION: On a core-attaching plate, attaching sections 6 are respectively formed at the four corners of its rectangular main body 5, and core attaching sections 8 which are bent upward perpendicularly to the main body 5 are formed at the outer end sections 5a of the main body. In addition, core-contacting sections 8b on and with which the lower bent section of a core 2 having a nearly square shape and a circular longitudinal cross section with which a pair of coil bobbins 3, is assembled are formed on both sides of each core attaching section 8. In addition, a narrow neck section 8c which can be bent outward into a V-shape is formed in the upper section of each core attaching section 8 and a caulking section 8d which presses the top side of the core 2, when the core 2 is placed on the core-contacting sections 8b formed on the neck section 8c.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transformer for use in consumer electronic equipment, which is called a so-called R core, and which can easily mount a round core without play. A core mounting plate.

[0002]

2. Description of the Related Art Conventionally, a transformer of this type has a mounting plate 30 as shown in FIG. A coil bobbin 32 composed of coil bobbin half bodies 32a, 32a is attached to 31, and a coil 33 is wound on the body while rotating the coil bobbin 32.

That is, the reason why the core 31 is a rounded R core having a substantially circular cross section is that the coil bobbin 32 attached to the outer periphery is smoothly rotated so that the coil 33 can be wound around the outer periphery. is there.

After the coil 33 is wound, it is necessary to integrally fix the coil bobbin 32 and the core 31 with the mounting plate 30 in order to prevent rattling.

[0005]

In this case, FIG. 4 and FIG.
As shown in FIG. 3, a pair of linear and strip-shaped fixing portions 34 formed on the mounting plate 30 are respectively inclined obliquely outwardly using a jig (not shown) such as pliers. The core 31 and the coil bobbin 32 are fixed to the mounting plate 30 by bending each time toward the core 31 while making contact with the flange side. Conventionally, there has been a problem that a total of four fixing portions 34 must be bent in this way, and the fixing operation is very complicated.

The present invention has been proposed in view of the above, and it is an object of the present invention to easily attach a core having an arc-shaped round portion incorporated in a cylindrical coil bobbin in a state without play. It is an object of the present invention to provide a transformer core mounting plate which can be easily fixed.

[0007]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a substantially rectangular body 5 having four mounting portions 6 at four corners.
Are formed at each outer end portion 5a, and a core mounting portion 8 is formed to be bent upward in a direction perpendicular to the main body 5 at each outer end portion 5a. A core contact portion 8b is formed on which a lower curved portion of the core 2 having a substantially circular longitudinal section into which the pair of coil bobbins 3 are incorporated is placed and abutted. Is formed with a neck portion 8c that can be bent substantially in a V-shape, and a caulking portion 8d that presses the upper portion of the core 2 placed on the core contact portion 8b is formed on the upper portion thereof. .

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view of a transformer in which a core, a coil and the like are incorporated in a transformer core mounting plate of the present invention, FIG. 2 is an exploded perspective view, and FIG. 3 is a longitudinal sectional view of the transformer in an assembled state.

First, in FIG. 1, reference numeral 1 denotes a core mounting plate having a bendable caulking portion 8d, and 2 denotes a substantially square shape.
And the vertical section is almost circular such as elliptical or oval,
A core called a so-called R core, 3 is a coil bobbin composed of a pair of coil bobbin halves 3a, 4 is a coil wound around the outer periphery of the winding drum portion, 4a is an insulating material wound around the outer periphery of the coil 4, These constitute a transformer T.

As shown in detail in FIG. 2, the core mounting plate 1 is provided with a substantially rectangular flat plate-shaped main body 5, and has a mounting portion 6 protruding outward at four corners and having a mounting hole 6a.
Are formed. Reinforcing ribs 7 are formed on the outside of the main body 5, respectively.

At the front and rear outer ends 5a of the main body 5, there are formed core mounting portions 8 which are bent upward in a direction substantially orthogonal to the main body 5.

[0012] The core mounting portion 8 includes a core mounting portion main body 8a.
And a bendable neck portion 8c formed above the core mounting portion main body 8a, and a substantially rectangular core fixing caulking portion 8d formed above the neck portion 8c.

That is, the base of the core mounting portion 8 rises orthogonally upward from the outer end surface 5a of the main body 5, and has a core contact portion 8b curved on both sides thereof so as to protrude outward. Are formed.

The neck portion 8c is formed narrower than the width of the upper portion of the core mounting portion main body 8a so as to be easily bent, and has a substantially rectangular shape above the neck portion 8c. A plate-shaped caulking portion 8d having substantially the same width as that above the mounting portion main body 8a is formed.

The core 2 has a wound iron core structure formed by winding a band-shaped silicon steel strip having a different width, and a pair of longitudinal outer peripheral portions are provided on a pair of longitudinal outer peripheral portions as shown in FIG. A coil bobbin 3 composed of a coil bobbin half 3a is rotatably mounted. And the winding drum part 3
The coil 4 (see FIG. 1) is wound around the coil bobbin 3 while rotating it.

That is, in assembling, the lower arc-shaped round portion inside the outer end of each longitudinal coil mounting portion of the core 2 is brought into contact with the core contact portion 8b formed in a substantially corresponding shape of the core mounting plate. It can be mounted and mounted.

In this case, as shown in FIGS. 1 and 3, the neck 8c of the core mounting portion 8 and the caulked portion 8d are provided through a gap between the outside of the flange 3c of the coil bobbin 3 and the inner peripheral surface of the core 2. It is projected upward.

Thereafter, the neck 8c is bent through a jig (not shown) into a substantially V-shape as shown by an arrow a in FIG. 3, and the crimping portion 8d presses the core 2 down. 8d may be bent and brought into contact with the upper part of the core 2.

Therefore, the core 2 is sandwiched between the core abutting portion 8b of the core mounting portion 8 and the caulking portion 8d, and the backlash thereof is prevented.

An insulating material 4a is wound around the outer periphery of the coil 4. Further, as is well known, the lead wire of the coil 4 is appropriately connected to a terminal (neither is shown), and the transformer is completed.

[0021]

As described above, according to the present invention, after the core 2 is placed via the core abutting portion 8b, the core 2 can be bent with the core abutting portion 8b simply by bending the neck 8b. 8d has the advantage that it can be mounted without play.

In this case, since the caulking portion 8d has a substantially rectangular shape, it can be easily grasped by a jig (not shown), and the neck portion 8c to be bent is narrow and has two places. There is an advantage that it is easy to bend.

[Brief description of the drawings]

FIG. 1 is an external perspective view of a transformer assembled using a core mounting plate according to one embodiment of the present invention.

FIG. 2 is an exploded perspective view of the same.

FIG. 3 is a sectional view taken along line AA in FIG.

FIG. 4 is a partial perspective view of a conventional transformer.

FIG. 5 shows a partial perspective view of an example of a conventional core mounting plate.

[Explanation of symbols]

 T transformer 1 core mounting plate 2 core 3a half coil bobbin 3b winding drum 3c flange 4 coil 4a insulating material 5 main body 5a outer end 6 mounting portion 6a mounting hole 7 rib 8 core mounting portion 8a core mounting portion main body 8b core contact Part 8c neck part 8d caulking part

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Yoshihiro Tokuda 5-5-30 Chiyoda, Sakado-shi, Saitama Pref. Tamura Corporation Saitama Plant

Claims (1)

[Claims] 1. A mounting portion 6 is formed at each of four corners of a substantially rectangular main body 5, and a core mounting portion 8 is formed at each outer end portion 5a. On both sides of the core mounting portion 8, a core abutment on which a lower curved portion of the core 2 having a substantially rectangular shape and having a substantially circular longitudinal section into which a pair of coil bobbins 3 are incorporated is placed and abutted. A core portion 8b is formed at the upper portion of the core portion 8b. The neck portion 8c is formed on the upper portion thereof and is narrow and can be bent in a substantially V-shape. A core mounting plate for a transformer, wherein a caulking portion 8d for pressing an upper part of the transformer is formed.