JPS59103315A - Component part for electric coil winding - Google Patents

Abstract

PURPOSE:To attain a simplified construction of a device for electric coil winding, e.g., composite transformer, by using a core assembly composed of a main core which has an H-shaped planar and side elevational configurations, and I-shaped cores attached to both sides of the main core, the central piller of the H-shaped main core carrying a coil which is wound thereon through an intermediary of a bobbin, such as to reduce the number of joint surfaces of the constituent cores. CONSTITUTION:A main core 6 made of ferrite is composed of a central member 6a and both shunt cores 6b, 6c attached to both ends of the central member 6a, such that the main core 6 exhibits a substantially H-shaped configuration when viewed in plan and side elevation. Outer cores 7a and 7b are attached to the side surfaces of the shunt cores 6b and 6c so as to form closed magnetic circuits for coil winding. A bobbin 8 is made from a synthetic resin to have a substantially U-shaped coil winding portion 8a sized to embrace the central member 6a. Flanges 8c are formed on both ends of the bobbin 8. Bases 8b having pins 10 extending downwardly therefrom are formed under the flanges 8c. In assembling, the bobbin 8 is mounted such that the coil winding portion 8a surrounds the central member 6a, and a coil is wound on the portion 8a of the bobbin 8, followed by attaching of the outer cores 7a and 7b.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to small electrical winding components, such as small transformers, choke coils, and the like.

This type of electric wire-wound component is suitable for mass production because it is in extremely large demand, and miniaturization is an important issue for this type of wire-wound component, which is often used in telecommunications equipment. ing.

FIG. 1 is a perspective view of a small transformer showing a conventional example.
FIG. 2 is a longitudinal sectional view of the transformer taken along line A-A in FIG. 1.

In these drawings, each of 1 and 2 is an E-shaped core of the same shape made of ferrite wire, 3 is an electrically insulating bobbin having flanges at both ends of a cylindrical winding part, and 4 is a wire wound on the bobbin 3. The terminal pin is embedded in the collar of the bobbin 3, and the end of the coil is fixed to the pin 5.

The above transformer is made by winding a wire around a bobbin 3, equipping the bobbin 3 with a coil 4, and then inserting a core 1.2 in the vertical direction of the bobbin 3, and fixing each leg end surface of the joined core 1.2. .

The size of such a transformer varies, but the /J% type transformer has a vertical and horizontal length of about 10 mm.

Now, the transformer mentioned above has the same shape core 1.2
This method is convenient for firing the core because it only requires the preparation of

(1) Due to the relationship in which the end surfaces of each leg of cores 1 and 2 are tangent,
A joint surface is formed in the magnetic path of the center leg and left and right legs, and the accuracy is lower than that of a transformer using an E-1 core that does not have a joint surface on each leg.

(2) In a transformer whose picture and horizontal length are around 10 mm, the left and right legs of core 1.2 are each 4.8 x 1.2
Since the cross-sectional area is very small, on the order of mm, these left and right legs may be damaged during the production process of the core or transformer.

(3) There may be resin particles or other dust attached to the cylindrical inner surface of the bobbin 3.
．． 2 may become wedged between the end faces of the center leg, resulting in the transformer itself becoming a defective product.

(4) In order to save the installation area, a composite transformer is often used, but the core 1.
2, it is difficult to construct a composite transformer.

Although the present invention was developed primarily to solve the above-mentioned drawbacks, it is also sufficiently effective when applied to electrical winding components other than transformers.

Accordingly, in the present invention, in an electric winding component having a configuration in which two cores are assembled to form a closed magnetic path around the coil, the central core portion and the middle part of the winding portion are connected by the central core portion. A main core consisting of a plurality of shunt core parts extending perpendicularly from the central core part, and two outer cores bridging the shunt core parts on both sides of the main core are provided. We propose an electric winding component in which the core is fully equipped with coils and then the outer core is fixed to the shunt core pitch.

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

FIG. 3 is a perspective view of a transformer showing the first embodiment of the present invention, and FIG. 4 is a simplified view of the coil taken along B-B in FIG.
FIG.

In these drawings, 6 is a main core formed in an H shape,
7α and 7b are outer cores formed in a square shape, 8 is a bobbin, 9 is a coil, and 1O is a terminal pin.

The main core 6 and the outer cores 7α and 7b described above are formed as shown in FIG. That is, the main core 6 is formed into an H shape with a central core part 6α forming a winding part and shunt core parts 6b and 6c connected by this central core part 6α. 6α is connected to a position on the side in the width direction of the shunt core portions 6b and 6C.

The outer cores 7α, 7b are plate-shaped L-shaped cores so that they can be fixed to the tip surfaces of the shunt knobs 6b, 6C on both sides of the central knob 6α.

The main core 6 and the outer cores 7α and 7b described above are formed by firing a ferrite material.

The bobbin 8 described above is formed as shown in FIG. That is, this bobbin 8 has a winding portion 8α having a U-shaped cross section,
The thick base portion 8 connected by this winding portion 8α
b, and a collar portion 8C that stands upright with a distance l from the base portion 8b.
A stepped portion is provided between the base portion 8b and the collar portion 8C. This bobbin 8 can be integrally formed of a synthetic resin material that is an electrically insulating material.

The terminal pins 10 described above are installed in the bobbin base part 8b, but the number of pins and the shape of the pins can be determined arbitrarily. It may also be made to protrude in the direction.

When winding, the main core 6 is fitted onto the bobbin 8. In this case, the central core part 6α is connected to the bobbin 80 and the winding part 8
The shunt core parts 6b and 6c are installed in the bobbin stand part 8b.
Make sure to put it on. FIG. 5 shows the state assembled in this way, but if there is a risk that the main body and aro may easily separate from the bobbin 8, the bobbin winding part 8
Adhesive tape 11 (see FIG. 4) may be wrapped around α. Note that this adhesive tape 11 is preferably electrically insulating. With the main core 6 fitted to the bobbin 8 in the state shown in Fig. 5, winding is performed on the bobbin winding portion 8α.
-9, and the coil end is fixed to the terminal pin 10 by soldering or other means.

The outer cores 7α, 7b are provided with a shunt core portion 6b after the winding described above.
, 6c, and these shunt core parts 6b, 6C.
are bridged by outer cores 7a and 7b provided outside the coil 9.

If the horizontal length of the bobbin stand 8b is slightly larger than the horizontal length of the shunt core parts 6b and 6c, L-shaped outer cores can be incorporated on both sides of the shunt core parts 6b and 6c. The location is convenient.

In the transformer configured as described above, joint surfaces are formed at 4 places at both ends of each of the shunt core parts 6b and 6C, but the central core part 6a
Since there is no joint surface in the magnetic path of the outer cores 7α, 7b, the influence of this joint surface on accuracy is considerably smaller than in the conventional transformer described above.
are produced separately from the main core 6, and only need to be glued to the shunt core parts 6b, 6c for assembly, so it is extremely unlikely that these cores will be damaged during the production process of the core or transformer. Furthermore, the winding portion 8 of the bobbin 8
Since α has a U-shaped cross section, dust stuck inside the winding part can be easily removed.Furthermore, since the leg end surfaces are not joined within this winding part 8α, the leg Failures do not occur due to dust trapped between the end faces.

Next, FIGS. 8 and 9 are sectional views similar to FIG. 4 showing an embodiment in which the winding part 8α of the bobbin 80 is modified, and in the embodiment shown in FIG. I made it to 2
In the embodiment shown in FIG. 9, the winding part 8α is removed and the bobbin stand part 8b and collar part 8c are bonded to the shunt core parts 6b and 6c. .

In the above embodiment, since the coil 9 comes into direct contact with the central core portion 6α, the main core 6 and the outer cores 7α, 7b
If the electrically insulating material is low, such as a manganese-based ferrite material, it may cause a failure due to conduction between the lines, but the central core part 6α is wrapped with an electrically insulating adhesive tape 11, or is coated with an electrically insulating solvent or the like. This problem can be solved by applying .

Furthermore, if cement wire or the like is used as the winding, there is no need to apply the electrically insulating melt material as described above.

In the transformers shown in the above embodiments, the shunt core part 6b or I'i6c and the bobbin base part 8b are held by a chuck and wound, but as the transformer becomes smaller, the area of the holding part becomes smaller. This makes the chuck clamping unstable. It is also possible to strengthen the clamping force of the chuck to securely hold it, but if this clamping force is made too strong, the shunt core portion 6b or 6c may be damaged.

Therefore, the main core 6 has a supporting piece 6 as shown in FIG.
It is effective to provide a support piece 6d and wind the support piece 6d while holding it with a chuck.

The support piece 6d is formed integrally with the main core 6 so as to protrude on an extension of the central core portion 6α, and when the main core 6 is fitted onto the bobbin 8, the state shown in FIG. 11 is achieved.

The support piece 6d is wound and then cut off from its base to form a transformer as shown in FIG. 3.

Further, the support piece 6d may be equipped with a coil to form a composite transformer without being cut off. That is, if the support piece 6d is equipped with the coil 12 that has been pre-wound around a bobbin, a composite transformer as shown in FIG. 12 will be obtained.

FIG. 13 shows another embodiment in which the present invention is implemented as a composite transformer, in which four shunt core sections 13b, 13c, 1 are connected to the central core section 13 (Z).
The main core 13 provided with 3d and 13e, and the main core 1
3, and two outer cores 14c and 14b that commonly connect the shunt core portions 13b to 13e. Further, the bobbin 15 of this embodiment has a winding portion 15α into which the central core portion 13α is fitted, and each of the shunt core portions 13b to 13b.
13e, and a terminal pin 10 is implanted in each bobbin stand 15b.

The other configuration is the same as the transformer shown in Fig. 3, and after winding and installing the coil 9, the outer core 14 is
By fixing +z and 14b, a composite transformer shown in a vertical cross-sectional view in FIG. 14 is constructed.

As described above, according to the present invention, the number of transformers to be integrated can be arbitrarily determined by providing a shunt core portion as necessary, rather than simplifying the structure of the composite transformer.

In addition, the 15 bobbins of the above composite transformer are shown in Figures 8 and 9.
The main core 13 is deformed as shown in the figure, and the main core 13 has a first
A support piece as shown in Figure O may be provided.

Next, FIGS. 5 to 17 show other embodiments using an H-shaped main core, and in this embodiment, an H-shaped main core]6
and two ■-shaped outer cores 17 (Z, 17b) are provided, and a bobbin J8 having a U-shaped cross section winding portion 18 (Z) is provided.
The main body core 16 is fitted into the main body core 16. That is, the bobbin 18 is provided with a flange portion 18b, and the flange portion 18b is formed with a notch 18c that communicates with the inside of the winding portion 18α.
, 1: Insert the 5 main core 16 and fit it into the winding part 18 (Z).

The other configurations are almost the same as the embodiment shown in FIG.
α, 17b will arrive at the same time.

As described above, the electrical winding component according to the present invention has a main core formed by a central core part forming a winding part and a plurality of shunt core parts orthogonal to this central core part, and after winding. Since the above-mentioned shunt core parts are configured to be bridged by the outer core, there is no joint surface in the magnetic path of the core leg, reducing the decrease in accuracy caused by the joint surface of each leg as in conventional transformers. In addition, since the outer core only needs to be fixed with adhesive from both sides of the main core, there is very little damage to the core during the production process of the core or electrical winding parts.Furthermore, the winding part of the bobbin is shaped like a cylinder. Since it is possible to take any shape such as a U-shaped cross section without having to cut it, and it is also possible to remove this winding part, the L, etc. stuck inside the winding part can be attached to the leg end surface of the core leg. There is no chance of it getting caught and causing a malfunction.

In particular, in the present invention, the plurality of shunt core sections are commonly bridged by two outer cores Aiδ on both sides of the main core, so that the structure of the composite transformer is simple and the production thereof is facilitated.

Although the above embodiments have been described with respect to a transformer, the present invention can be similarly implemented with respect to other electric winding parts, and the main core and the outer core are not limited to ferrite cores, but may be laminated cores.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a conventional transformer, FIG. 2 is a vertical cross-sectional view of the transformer taken along line A-A in FIG. 1, and FIGS. 3 to 17 are views of the present invention. Fig. 3 is a perspective view of a transformer using an H-shaped main core, Fig. 4 is a cross-sectional view taken along the line B-B in Fig. 3, showing a simplified view of Koino L, and Fig. 5. is an exploded perspective view showing the transformer production process,
Fig. 6 is a perspective view of the main core and outer core used in the transformer shown in Fig. 3, Fig. 7 is a perspective view of the bobbin, and Figs. 8 and 9 are similar to Fig. 4, showing modifications of the bobbin. FIG. 10 is a perspective view of the main core integrally formed with a support piece for winding, FIG. 11 is a perspective view showing the main core shown in FIG. 10 fitted into a bobbin, and FIG. Figure 12 is a vertical cross-sectional view of a composite transformer using a main core with a supporting piece, Figure 13 is a perspective view showing the production process of the composite transformer, and Figure 14 is a
Fig. 15 is a perspective view showing another embodiment of the transformer using an H-shaped main body core, Fig. 6 is a cross-sectional view of the transformer shown in Fig. i415,
FIG. 17 is a second diagram showing the core and bobbin of the transformer shown in FIG. 15. 6...Main core 6α...Central core part 6b1
6c゛・Shunt core part 7α, 7b...Outer core 8...
・Bobbin 9...Coil 10...Terminal hinge 1
2... Coil 13... Main core 13α River center core portion 13b to 13e... Shunt core portion 14α, 14
b... Outer core 15... Bobbin 16... Main core 16α, 16b... Shunt core part 17α, 1
7b...Outer core 18...Bobbin Fig. 6 7h Fig. 8 Fig. 9 Wa 10 10 Fig. 10 Fig. 11 Fig. 13 Fig. 14 Fig. 15 Fig. 1 m6 Fig. 15 160

Claims (3)

[Claims] (1) In an electric winding component configured to form a magnetic path (closed around the coil 3 by combining two cores), the central core part and the middle part of the winding part are connected by the central core part, and this central A main core comprising a plurality of shunt core parts extending perpendicularly to the core part, and two outer cores bridging the shunt core parts on both sides of the main core. An electric winding component made by equipping the core with a coil and then fixing the outer core to the shunt core. (2) The electrical winding component according to claim (1), wherein the main core is formed into an H-shape, and the two outer cores are formed into a rough shape. (3) #I A main core formed by extending a plurality of shunt core parts at regular intervals on both sides of a long core body, and a plate-shaped plate that commonly connects the shunt core parts on both sides of this main core. An electrical winding component according to claim (1), comprising an outer core.