JP2552823Y2 - Common mode choke coil - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a common mode coil for preventing electromagnetic noise using a closed magnetic circuit core mounted on an electronic device.

[0002]

2. Description of the Related Art A common mode choke coil (hereinafter referred to as "coil") for preventing electromagnetic noise is a conventional toroidal core (hereinafter referred to as "core") provided with an insulating case (hereinafter referred to as "case") having a center partition plate for inter-winding insulation. ), And winds two windings from the top of the case, pulls out the four ends of the windings in the same direction parallel to the axial direction of the core, and directly mounts them on the wiring board as the lead terminals of the coil. I was

[0003]

In the conventional coil, it is difficult to pull out the ends of the windings in a required arrangement, the arrangement is likely to be out of order, and there is a variation in the outer shape, so that an automatic mounting machine cannot be applied. was there.

[0004]

According to the common mode choke coil of the present invention, a coil element in which a winding is directly applied to the opposite side of a square core having an insulating coating is housed in a box-shaped insulating container having an upper surface opening. In the insulating container, pin terminals are vertically penetrated on the side walls of the four corners, a center partition plate that can be inserted into the center hole of the core is provided on the inner bottom, and the coil is fixed by filling the center hole of the core with insulating resin. The end of the winding is passed through the holding portion at the upper end of the pin terminal and connected by soldering.

That is, the present invention relates to a coil element in which windings are respectively wound around opposing sides of a square-shaped core whose surface is insulated, a box-shaped upper surface opening, and a holding portion at the upper end at the four corners. And a box-shaped insulating container provided with a central partition plate for inter-winding insulation at the inner bottom of the storage recess, wherein the coil element is housed in the storage recess. A common mode choke coil characterized in that at least a central hole of the square core is filled with an insulating resin and fixed, and an end of the winding is connected to the holding portion.

[0006]

The box-shaped insulating container maintains the lead terminals in a required arrangement and enables the coil to be aligned and picked up. The center partition plate of the container insulates between the windings and fixes the coil element to the container with the insulating resin.

[0007]

1 is a perspective view of a common mode choke coil of the present invention, and FIG. 2 is an exploded perspective view of the common mode choke coil of the present invention. 1 and 2,
The box-shaped insulating container 1 has an upper surface opening made of an electrically insulating material,
It has a slightly thick side wall, and a central partition plate 3 is integrally provided at the center of the inner bottom of the storage recess 2 at a height up to the opening surface. A pin terminal 4 having a round diameter and a holding portion 5 having a flat upper surface are integrally provided. The storage recess 2 has a depth capable of storing a coil element 6 to be described later, and the center partition plate 3 has a size that can be inserted into the center hole of the square core 7. Pin terminal 4
The upper end of the rod-shaped conductor is crushed flat, or the strip-shaped conductor is formed into a cylindrical shape from the middle to the lower part. A holding portion 5 comprising an insertion hole and an upwardly open slit extending from the upper end surface to the insertion hole is formed. Actually, the holding portion 5 has a diameter of the insertion hole substantially equal to or slightly larger than the diameter of the winding material, and the minimum width of the slit is set to a size slightly smaller than the diameter of the winding machine.

The coil element 6 is a common mode choke in which windings 8 are wound around two opposing sides of a square core 7 coated with an insulating coating. Since the winding portion of the winding 8 is substantially straight and the core is wound through a central hole without a center partition plate, the winding operation is easier than in the case of a toroidal core.

The coil element 6 is housed in the storage recess 2 of the box-shaped insulating container 1 by inserting the center partition plate 3 into the center hole of the core 7, and insulating resin (for example, silicone resin) 9 is provided on both sides of the center partition plate 3. Is filled almost completely and solidified to fix the coil element 6 to the insulating container 1 (see FIG. 1). Soldering is performed by passing the end of the winding 8 through the holding portion 5 integrated with the pin terminal 4, and a common mode choke coil is completed. Since the insulating film of the winding material is peeled off by heat at the time of soldering, the end of the winding 8 can be conductively connected to the holding portion 5 without a buckling operation.

[0010]

[Effects of the Invention] According to the present invention, since a square-shaped core is used, it is possible to work without a center partition plate when winding, and the winding work is easier than before and the number of man-hours of the winding work is reduced. Since an insulating container with pin terminals is used, the outer shape and the arrangement of the lead terminals are always fixed, so that the automation ratio can be increased, the productivity is good, and an excellent common mode choke that can be used in automatic mounting machines Can provide coil.

[Brief description of the drawings]

FIG. 1 is an external view showing an embodiment of a common mode choke coil according to the present invention.

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

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 (Box type) Insulating container 2 Storage recess 3 Center partition plate 4 Pin terminal 5 Nipping part 6 Coil element 7 (R-shaped) core 8 Winding 9 Insulating resin

Claims (1)

(57) [Scope of request for utility model registration] 1. A coil element in which windings are respectively wound around opposed sides of a square core whose surface is insulated, and a box-shaped upper surface opening, and a holding portion formed at an upper end at four corners thereof. A pin-shaped insulating container provided with pin terminals protruding up and down and integrally provided, and a central partition plate for insulation between windings provided at the inner bottom of the storage recess, wherein the coil element is stored in the storage recess, and is insulated. A common mode choke coil characterized in that at least a central hole of the square core is filled with resin and fixed, and an end of the winding is connected to the holding portion.