JPH09213545A - Common mode choke coil - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a common-made choke coil in which the number of components constituting a bobbin is reduced so as to easily control the components by a method wherein the bobbin is formed in such a way that two cylinders which are arranged in parallel and to which a winding operation is performed and an insulating partition plate which comprises a pedestal in the central part in the length direction of the cylinders and which comprises claws to be fitted to the pedestal at both ends are molded integrally. SOLUTION: In a bobbin 1 for a common-mode choke coil, two cylinders 2 which are arranged in parallel and an insulating partition plate 3 which comprises a pedestal 20 in the central part in the length direction of the cylinders 2 and in which claws 4 to be fitted to the pedestal are provided at both ends are formed integrally. Then, in the pedestal 20 at the common-mode choke coil, notches 6 which agree with cylindrical parts are formed in side faces 5 which face in the length direction of the cylinder 2, recess 8 to be fitted to the claws 4 are provided on two side faces 7 which are at right angles to the side faces 5, and a through hole 9 through which the lead-out wire of a winding is passed is formed in the bottom face 21. Thereby, it is possible to obtain the common-mode choke coil in which the number of components is reduced, which is assembled easily and whose mass productivity is enhanced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a common mode choke coil used in consumer electronic devices, industrial electronic devices and the like, and more particularly to the structure thereof.

[0002]

2. Description of the Related Art A common mode choke coil is inserted into a power supply line of an electronic device such as a switching power supply and used as an electronic component for suppressing electromagnetic noise. A conventional common mode choke coil will be described below with reference to the drawings.

As shown in FIG. 4, a conventional common mode choke coil has two cylinders 2 and 2'and two cylinders 2 and 2 '.
Two collars 1 having two holes 19 for inserting 2 '
4, a bobbin 16 composed of one insulating partition plate 15 having the same shape as the collar 14, a split type closed magnetic circuit magnetic core 17, and a winding wound in a laminated stack in a tubular shape.

Further, the conventional common mode choke coil is assembled by winding the laminated windings 18a, 18 in a cylindrical shape.
The cylinders 2 and 2'are respectively inserted into b,
The insulating partition plate 15 and the other windings 18c and 18d that are laminated and wound in a tubular shape are inserted through 2 ', and the insulating partition plate 15 is sandwiched by the winding wires that are laminated and wound in a tubular shape. The collar 14 is inserted through both ends, and finally the split type closed magnetic circuit magnetic core 17 is inserted.
It was done by combining.

[0005]

As described above, the conventional common mode choke coil has a problem in that it is difficult to manage because the components forming the bobbin are individually separated and the number of components is large.

Further, since it takes time to assemble the parts and the position of the lead wire after assembly is not fixed, it takes time to disperse the position of the lead wire and to mount it on a printed circuit board or the like, which leads to mass production. There was a problem that it was not suitable.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a common mode choke coil having a structure suitable for mass production by reducing the number of parts constituting the bobbin, facilitating the management of the parts.

[0008]

According to the present invention, a split type closed magnetic circuit magnetic core, a bobbin, a pedestal, and a conductor are laminated and wound in a cylindrical shape,
In a common mode choke coil including windings which are wound again in a tubular shape by forming the ends thereof into a figure eight shape, the bobbin has two cylinders for performing windings arranged in parallel, A common mode choke coil is characterized in that an insulating partition plate having claws at both ends for engaging with a pedestal is integrally formed at the center of the cylinder in the length direction.

In the common mode choke coil according to the present invention, the pedestal is provided with a notch on a side surface facing the lengthwise direction of the cylinder, the cutout matching the cylinder of the bobbin.
A common mode choke coil characterized in that recesses that engage with the claws are provided on two side surfaces that are orthogonal to the side surfaces provided with notches, and that a through hole for passing a lead wire of a winding is provided on the bottom surface. Is.

In the common mode choke coil of the present invention, after inserting the winding wound in the laminated winding into the bobbin, the bobbin and the pedestal are engaged with each other, and a split type closed magnetic circuit magnetic core is attached to the cylinder. A common mode choke coil having a structure in which the split type closed magnetic circuit magnetic core is fixed by a C-shaped core holder after being inserted.

With the structure of the present invention, the bobbin-related parts are
Only the bobbin and the pedestal with the insulating partition plate formed integrally,
Parts management becomes easy.

Further, the assembly can be easily carried out in a short time, and since the tip of the lead wire of the winding penetrates through the through hole provided at the bottom of the pedestal, the winding is mounted on the bobbin. Since it is fixed without moving and the lead line can be positioned, it can be easily mounted on a printed circuit board or the like, and mass productivity is improved.

[0013]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing a bobbin of a common mode choke coil according to the present invention. FIG.
FIG. 3 is a perspective view showing a base of a common mode choke coil according to the present invention. FIG. 3 is a perspective view showing a common mode choke coil according to the present invention.

As shown in FIG. 1, a bobbin 1 of a common mode choke coil according to the present invention has two cylinders 2 arranged in parallel with each other, and the cylinder 2 has a longitudinal center portion for engaging a pedestal. An insulating partition plate 3 having claws 4 at both ends is integrally formed.

As shown in FIG. 2, the pedestal 20 of the common mode choke coil according to the present invention is provided with a notch 6 on the side surfaces 5 facing each other in the length direction of the cylinder so as to match with the cylindrical portion. Two side faces 7 orthogonal to 5 have a recess 8 for engaging with the claw, and a bottom face 21 has a shape having a through hole 9 for passing a lead wire of a winding wire. .

The common mode choke coil of the present invention is
As shown in FIG. 3, the windings 10 and 10 ′ are automatically laminated and wound in a tubular shape, and the ends thereof are shaped like a figure 8. Then, the cylindrical 2 portion of the bobbin 1 is attached to the windings 10 and 10 ′ that are cylindrically wound again. Insertion, bobbin
The insulation partition plate 3 of No. 1 is sandwiched between the two windings 10 and 10 'and assembled.

Next, the lead wire 1 of the windings 10 and 10 '
1 through the through hole at the bottom of the pedestal 20,
The bobbin 1 is pushed in until the claws provided at both ends of the insulating partition plate 3 of No. 1 and the recesses of the pedestal 20 are engaged, and the split type closed magnetic circuit magnetic core 12 including a pair of U-shaped magnetic cores is inserted into the bobbin 1 cylinder. After being inserted into the two parts, the C-shaped holder 13 forms a closed magnetic circuit and is fixed to the pedestal 20.

With this structure, the cylinders 2 and 2'of the bobbin 1 are
The end portion of the portion and the side surface 5 provided with the notch of the pedestal 20
Therefore, the side surface 5 has the same function as the collar of the conventional bobbin.

Therefore, the pedestal 20 has the functions of fixing the collar and the bobbin, positioning the lead wire, and fixing the magnetic core.

In this embodiment, the wire diameter of the winding wire is 2.2.
mm. PBT (polybutylene terephthalate) was used for the bobbin and the pedestal, and a molded product of a stainless plate having a thickness of 0.5 mm was used for the holder.

[0021]

According to the present invention, it is possible to obtain a common mode choke coil in which the number of parts is reduced, the assembly is easy, and the mass productivity is improved.

[Brief description of drawings]

FIG. 1 is a perspective view of a bobbin of a common mode choke coil according to the present invention.

FIG. 2 is a perspective view of a base of a common mode choke coil according to the present invention.

FIG. 3 is a perspective view of a common mode choke coil according to the present invention.

FIG. 4 is a perspective view of a conventional common mode choke coil.

[Explanation of Codes] 1 , 16 bobbin 2, 2'cylindrical 3, 15 insulating partition plate 4 claw 5, 7 side surface 6 notch 8 recess 9 through hole 10, 10 ', 18a, 18b, 18c, 18d winding 11 drawer Wires 12 and 17 (divided type) Closed magnetic circuit core 13 Holder 14 Tsuba 19 Hole 20 Pedestal 21 Bottom

Claims (3)

[Claims] 1. A common structure comprising a split type closed magnetic circuit magnetic core, a bobbin, a pedestal, and a conductor wire, which are wound in a cylindrical shape in a laminated manner, the ends of which are formed into a figure eight shape, and which are wound again in a cylindrical shape. In the mode choke coil, the bobbin is an insulation having two cylinders arranged in parallel for winding, and claws for engaging a pedestal at both ends of the cylinder in the longitudinal center thereof. A common mode choke coil characterized in that a partition plate is integrally formed. 2. The common mode choke coil according to claim 1, wherein the pedestal is provided with a notch that matches the cylinder of the bobbin on a side surface facing the length direction of the cylinder, and a side surface provided with the notch. A common mode choke coil, characterized in that recesses that engage with the claws are provided on two side surfaces that are orthogonal to each other, and a through hole for passing a lead wire of a winding is provided on a bottom surface. 3. The common mode choke coil according to claim 1, wherein the bobbin is inserted into the laminated winding, and then the bobbin and the pedestal are engaged to divide into the cylinder. A common mode choke coil having a structure in which a closed magnetic circuit core of a split type is fixed with a substantially C-shaped core holder after the closed magnetic circuit core of the mold is inserted.