JP2001068352A - Reactor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a reactor wherein a pair of cores are reliably integrated through a magnetic gap material without use of a mounting piece. SOLUTION: The reactor is constructed such that coils 5 are wound around the barrels of a pair of coil bobbins 1, and such that leg portions 6a/6b and 7a/7b of a pair of cores 6 and 7 are inserted into hollow portions 3 of the barrels 2 of the bobbins 1 from the outside of flanges 4 of the bobbins 1, to joint the portions 6a/6b and 7a/7b of the two cores 6 and 7 together at joints 8, respectively. In this reactor, magnetic gap materials 11/11 are interposed at the leg portions of one of the two cores 6 and 7. The area (a)of each material 11 is smaller than the area A of the corresponding joint 8 to the possible extent. With the materials 11/11 thus interposed, the portions 6a/6b of the core 6 and the portions 7a/7b of the core 7 are integrally jointed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reactor incorporated in the primary side of a power supply circuit of a television or the like and used for suppressing a harmonic current.

[0002]

2. Description of the Related Art FIG. 3 is a perspective view of a conventional reactor before a coil block is assembled, and FIG. 4 is a longitudinal sectional side view of the assembled state.

[0003] The coil block of this type of reactor is
As shown in FIGS. 3 and 4, the coil 5 is wound around the outer periphery of the winding drum 2 of the coil bobbin 1, and a pair of U / U-shaped cores 6 and 7 are arranged on both axial sides of the coil bobbin 1. The legs 6a, 6b, 7a, 7b of the cores 6, 7 are inserted into the hollow portion 3 of the winding drum 2 from outside the flange 4 of the coil bobbin 1, and the legs 6a, 6b, 7a, The opposing surfaces 8 of 7b are arranged to oppose each other via a magnetic gap 9,
Some are fixed with an adhesive 10 or the like.

As another fixing means for the core, it is conceivable to use a mounting bracket for the core.

[0005]

However, when fixing the pair of cores 6 and 7 arranged opposite to each other as described above, the magnetic gap portion is simply filled with the adhesive 10 and fixed. There is a disadvantage that it is difficult to keep the interval at a predetermined size. In addition, although it can be securely fixed by using a mounting bracket, there is a problem that the U and U type inner iron cores 6 and 7 are difficult to mount due to restrictions on mounting locations.

The present invention has been proposed in view of the above, and it is an object of the present invention to securely integrate a pair of cores while maintaining a predetermined magnetic gap without using a mounting bracket. It is to provide a reactor to obtain.

[0007]

According to the present invention, a coil 5 is wound around a winding drum 2 of a pair of coil bobbins 1 and a pair of cores 6 and 7 are respectively wound around a hollow portion 3 of the winding drum 2 of the coil bobbin 1. The legs 6a and 6b and 7a and 7b of the coil bobbin 1
In the reactor in which the legs of the two cores 6 and 7 are inserted from the outside of the flange 4 and the opposing surfaces 8 thereof are opposed to each other via a magnetic gap, the magnetic force is applied between the magnetic gaps between the cores 6 and 7. A gap material 11 is provided and an adhesive 10
Is filled in between and around the opposing surfaces 8 to fix the cores 6 and 7, and the area a of the magnetic gap material 11 is set to be approximately １ ／ of the area A of the opposing surface 8. Have achieved.

[0008]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows an embodiment of the present invention, and is a perspective view before assembling a coil block, and FIG. 2 is a longitudinal side view of the assembled state.

In the embodiment shown in FIGS. 1 and 2,
The coil 5 is wound around the winding drum 2 of the coil bobbin 1. The two coil bobbins 1, 1 around which the coil 5 is wound are connected in a horizontal direction YY orthogonal to the axial direction XX.

Two pairs of cores 6, 7 are opposed to each other so as to correspond to the hollow portions 3, 3 of the winding drum portions 2, 2 in the coil bobbins 1, 1.

Each of the cores 6 and 7 is formed in a U shape.
One of the cores 6 has legs 6a and 6b, and the other core 7 has legs 7a and 7b. The two cores 6 and 7 have the opposing surfaces 8 of the legs 6a and 6b and 7a and 7b facing each other, that is, the leg portions 6a are formed in the hollow portions 3 and 3 of the winding body portions 2 and 2 of the coil bobbins 1 and 1, respectively.・ 6b 、 7a ・ 7
The facing surface 8b is oriented with a predetermined magnetic gap.

In this embodiment, a magnetic gap material 11 is provided between the magnetic gaps of the two cores 6 and 7, respectively.

Each magnetic gap member 11 is formed by cutting a sheet made of, for example, insulating paper or synthetic resin into a substantially rectangular shape. Further, when the area of the opposing surface 8 of the leg portion of the core is A and the area of the magnetic gap material 11 is a, the area a of the magnetic gap material 11 is approximately 2/1 with respect to the area A. The area a of the magnetic gap material 11 is made as small as possible with respect to the area A of the facing surface 8 of the leg of the core, while ensuring a size capable of performing the function as a material. The reason for this is that the provision of the magnetic gap material 11 may reduce the adhesiveness to the cores 6 and 7. Therefore, the above-described configuration secures the adhesive area and enables reliable adhesion.

As described above, in this embodiment, the magnetic gap members 11 are provided between the opposing surfaces 8 of the legs 6a and 6b of the core 6, respectively, and the legs 6a and 6b of the cores 6 and 7 are formed.
An adhesive 10 is applied to the peripheral portion including the opposing surface 8 of the core 7b, and the leg 6a of the core 6 with the magnetic gap material 11 interposed therebetween.
6b and the leg portions 7a and 7b of the core 7 are inserted into the hollow portions 3 and 3 of the winding drum portions 2 and 2 from outside the flange 4 of the coil bobbins 1 and 1, and the leg portions 6a and 7 of the cores 6 and 7 are inserted. 6b, 7a
7b: The opposing surfaces of 7b are pressed against each other, and fixed with the adhesive 10 while the magnetic gap is maintained at a predetermined value by the magnetic gap material 11.

As described above, in this embodiment, the magnetic gap member 11 is formed to have the smallest possible area a within a range where the function can be performed. Even if not used, the legs 6a and 6b and 7a and 7b of the cores 6 and 7 are connected to each other by the magnetic gap material 1.
1 can be surely integrated.

[0017]

As described above, according to the present invention, the magnetic gap material 11 having an area a as small as possible with respect to the area A is provided on the opposing surface 8 of the cores 6 and 7, Legs 6a and 6b, magnetic gap materials 11 and 11, and core 7
Because the legs 7a and 7b are bonded together,
The leg portions 6a and 6b and 7a and 7b of the cores 6 and 7 are securely bonded while maintaining the magnetic gap, so that the cores 6 and 7 can be surely integrated.

[Brief description of the drawings]

FIG. 1 shows an embodiment of the present invention, and is a perspective view before assembling of respective members.

FIG. 2 is a longitudinal sectional side view showing a state where each member is assembled in the embodiment shown in FIG. 1;

FIG. 3 is a perspective view showing a state before assembling of each member according to the related art.

FIG. 4 is a vertical sectional side view of a state where each member is assembled in the prior art shown in FIG. 3;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Coil bobbin 2 Winding body part 3 Hollow part of winding body part 4 Flange of coil bobbin 5 Coil 6 Core 6a, 6b Core leg 7 Core 7a, 7b Core leg 8 Opposing surface of leg 10 Adhesive 11 Magnetic gap Material A Area of joint of leg part a Area of magnetic gap material

Claims (1)

[Claims] A coil (5) is wound around a winding body (2) of a coil bobbin (1), and a pair of two is formed in a hollow part (3) of a winding body (2) of the coil bobbin (1). The legs (6a) and (6b) of the cores (6) and (7),
(7a) and (7b) are inserted from the outside of the flange (4) of the coil bobbin (1), and the legs of the two cores (6) and (7) are connected to the opposing surface (8) with a magnetic gap. A magnetic gap material (11) is provided between the magnetic gaps between the cores (6) and (7), and an adhesive (10) is applied between the opposing surfaces (8) and the periphery thereof. And the core (6),
(7) is fixed, and the area a of the magnetic gap material (11) is
Is a reactor having an area A substantially equal to 1/2 of the facing surface (8).