JP3180258B2 - Small electronic components - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a core for a small electronic component in which a winding is wound on a bobbin or an air-core coil is used, and a core is inserted around the coil to change electrical characteristics.

[0002]

2. Description of the Related Art FIG. 6 is a perspective view showing a bonding state in which an adhesive is applied to a bonding portion of a conventional square-shaped small electronic component core. FIG. 7 is a perspective view showing a bonding state in which an adhesive is applied to a bonding portion of a conventional small-sized electronic component core in the shape of a letter L. FIG. 8 is an AA sectional view of FIG.

[0003] As shown in FIG. 6, a square-shaped small electronic component core is shown, two U-shaped cores 1 are combined, and an air-core coil 3 is inserted into the air-core portion to form side surfaces of the two cores. The adhesive 2 was applied to the joint portion 5 of the above, and the core 1 was joined.

[0004] As shown in FIG. 7, a small electronic component core in the shape of a letter “C” is shown. Two U-shaped cores 1 are combined, and an air-core coil 3 is inserted into the air-core portion to form a side surface of the two cores. The adhesive 2 was applied to the joint portion 5 of the above to join the core.

FIG. 8 is a sectional view taken along the line AA of FIG. FIG. 8 shows a small electronic component core in the shape of a star. The core 1 is assembled by joining the joint surfaces 5 of the core, and the two E-shaped cores complete the sun-shaped core, and the air core 6 is formed.

[0006]

Conventionally, the core of a small electronic component has been fixed by metal fittings, tapes, and resin bonding. In particular, the bonding is performed from the viewpoint of automation. Indeed, it is difficult to obtain dimensional accuracy due to warping or the like due to a problem in manufacturing the core, and therefore, even in automation of bonding, a variation occurs in bonding force and the like. In addition, the core for small electronic components is fixed by metal fittings and resin adhesive fixing, and resin adhesive fixing is performed in terms of material cost. However, due to electrical characteristics, side adhesion (joining surface between cores) is performed. No resin is attached). However, due to the structure of the square-shaped or sun-shaped core, there are disadvantages in that the number of bonding points is plural, and the number of bonding steps or equipment for automation is plural.
In order to eliminate these drawbacks, the present invention provides a triangular prism or a semi-cylindrical core with a concave or cutout in the longitudinal direction near the joint of one core, or the thickness of the core at the center of the foot of one core. It is an object of the present invention to provide an inexpensive small-sized electronic component core that has a vertical through-hole penetrating through, and stabilizes the adhesive force without increasing the amount of adhesive, and can be easily automated.

[0007]

According to the present invention, a closed magnetic circuit core having a substantially rectangular parallelepiped outer shape and a cross section with a sunshade is formed by abutting two core members with the leg portions of the core members. In a small electronic component in which a coil member is housed in a road core, one of the core members extends from an outer edge of an outer surface of the core substantially perpendicular to the leg to an abutting surface of the leg with the other core member. The outer surface has a notch recess substantially perpendicular thereto, and the mating surface of the leg of the other core member is substantially perpendicular to the notch recess when combined with the one core member. The closed magnetic circuit cores are fixed to each other by applying an adhesive to the substantially vertical bottom, and the outer shape of the small electronic component is determined by the outer shape of the closed magnetic circuit core. Small Electronic parts can be obtained. Further, according to the present invention, the two core members are abutted against each other with the leg portions of the core members to form a closed magnetic circuit core having a substantially rectangular parallelepiped shape and a cross-shaped sun, and a coil member is provided in the closed magnetic circuit core. In the small electronic component housed, one of the core members has a through hole substantially perpendicular to the outer surface from an outer edge of an outer surface of the core substantially perpendicular to the leg portion to an abutting surface of the leg portion with the other core member. A hole, and the mating surface of the leg of the other core member provides a bottom substantially perpendicular to the through hole when combined with the one core member; The small magnetic component is characterized in that the closed magnetic circuit cores are fixed to each other by applying an adhesive to a vertical bottom, and the outer shape of the small electronic component is determined by the outer shape of the closed magnetic circuit core. Is obtained.

When the core is configured as described above,
The adhesive is applied to the joint surface (that is, the butt surface) of the core member.
Complete penetration and easy joining. Also, the notch recess
And both of the through holes extend in the vertical direction of the core.
Therefore, it has an adhesive injection part that can move up and down
The adhesive can be applied by common adhesive application means.
And it becomes easy. Specifically, the coil member is stored
With the two core members abutting each other,
Notch or through hole cut out substantially perpendicularly from the outer surface side of the core member
Insert the adhesive applying means along the other core
Provided for notch recess or through hole by member
Adhesive is applied to the substantially vertical bottom by adhesive application means.
It becomes easy to apply.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a perspective view of a square-shaped small-sized electronic component core having a triangular or semi-cylindrical core provided with a recess on the longitudinal edge of one of the cores. FIG. 2 is a perspective view of a sun-shaped small electronic component core in which a concave portion that cuts out a side surface of a triangular or semi-cylindrical core is provided on a longitudinal edge of one core. FIG. 3 is a perspective view of a square-shaped small electronic component core provided with a vertical through-hole penetrating the thickness of the core at the center of the foot of one core. FIG. 4 is a perspective view of a sun-shaped small electronic component core in which a vertical through hole penetrating the thickness of the core is provided in a foot portion at the center of one core. FIG. 5 is a sectional view taken along the line BB of FIG.

FIG. 1 is a side view of one of the cores, in which a concave portion 7 notching a side surface of a triangular prism core or a concave portion 8 notching a side surface of a semi-cylindrical core is provided on a longitudinal edge which is a side surface of one core. This is a component core. The core 1 has a U-shape. The adhesive 2 is applied to the joining surface 5 on the side surface in the longitudinal direction of the core. Since the recess is perpendicular to the joint surface 5, as shown in FIG. 1, it is easier to work when the adhesive 2 is applied to and penetrates the joint surface 5 on the side surface in the longitudinal direction of one of the cores. High adhesive strength. The concave portion 7 that cuts out the side surface of the triangular prism core and the concave portion 8 that cuts out the side surface of the semi-cylindrical core may be located on the longitudinal edge of one core. If the recesses are present in both cores at the same time, it is necessary that the positions of the recesses do not span the two cores.

FIG . 2 illustrates a small Japanese character according to an embodiment of the present invention.
It is a figure showing a mold part. One core part constituting the core 1
The outer surface of the core member (the drawn-out reference numeral 1)
Cut in a direction substantially perpendicular to the
A notch recess 7 or 8 is provided. Notch recess 7
Cut the side surface of the core 1 into a triangular prism shape in the thickness direction of the core 1.
The notch recess 8 is located on the side of the core 1.
The surface is cut in a semi-cylindrical shape in the thickness direction of the core 1.
It is. One of the core members constituting the core 1 is E-shaped.
It is. In other words, the small electronic component shown in FIG.
Butt two core members with the legs of the core member
, A closed magnetic circuit core with a substantially rectangular parallelepiped outer shape and a cross-shaped sun (1)
And the coil member (3) is housed in the closed magnetic path core.
It is. This small electronic component has one core
On the side of the material, from the outer edge of the outer surface of the core member to the other core
Substantially perpendicular to the outer surface up to the abutment surface (5) of the leg with the member
It has a notch recess (7, 8). Also, the other
The butting surface (5) of the legs of the core member is
Notch recesses (7, 8) when combined with material
To provide a substantially vertical bottom. Such a structure
The joining of the core members is performed as follows.
You. First, the coil member (3) is housed inside.
To form a closed magnetic circuit core (1)
I do. In that state, it is almost perpendicular from the outer surface side of one of the core members.
Apply adhesive along the notches (7, 8)
Inserting means, notch recess formed in the other core member
An adhesive is applied to the bottoms of the parts (7, 8). this
As a result, the adhesive is immersed in the butt surface (that is, the bonding surface 5).
The see-through and closed magnetic circuit cores (1) are completely fixed to each other. This
Small electronic components such as
Is determined by

FIG. 3 shows a small electronic component core in which a through hole 9 is formed in a foot portion of one of the cores so as to penetrate the thickness of the core. It is not good that the through-hole 9 penetrates the two cores, but it is not necessary to ask much about the shape of one core as a cylinder or a quadratic prism. It is provided at the center. By applying the adhesive 2 to the through holes 9, the adhesive 2 penetrates into the joint surface of the two cores, and the cores can be completely joined.

FIG . 4 shows a small Japanese character in accordance with an embodiment of the present invention.
It is a figure showing a mold part. One core part constituting the core 1
The legs of the material are provided on the outer surface of the core member (1
Through-hole that penetrates in a direction substantially perpendicular to the
9 are provided. The shape of the through hole 9 is a square even if it is a cylinder.
It may be a pillar. One of the core members constituting the core 1 is
E-shaped. In other words, the small electronic component shown in FIG.
Abuts the two core members with the legs of the core members
Closed magnetic circuit core with a roughly rectangular parallelepiped outer shape
(1) is formed, and a coil member (3) is placed in the closed magnetic circuit core.
It is what is stored. This small electronic component
From the outer edge of the outer surface of the core member to the leg of the core member,
Through to the butting surface (5) of the leg with the core member
The outer surface has a substantially vertical through-hole (9). Also other
The butting surface (5) of the legs of one core member is
A) When combined with a member, it is substantially perpendicular to the through hole (9).
Gives a straight bottom. Have such a structure
Joining of the core members is performed as follows. Ma
Instead, house the coil member (3) inside
The members are butted against each other to form a closed magnetic circuit core (1).
In that state, penetrate almost vertically from the outer surface side of one of the core members
Insert the adhesive applying means along the hole (9),
To the bottom of the through hole (9) formed by the core member
And apply an adhesive. This allows the adhesive to butt
Surface (that is, the joint surface 5), and the closed magnetic circuit core (1)
They are completely fixed to each other. Such small electronic components are
The outer shape is determined by the outer shape of the closed magnetic circuit core.

FIG. 5 is a sectional view taken along the line BB of FIG. This is a core for a small electronic component having a sun-shape provided in a through hole 9 penetrating through the thickness of the core in the middle foot of one core 1. A through hole 9 penetrating the thickness of the core is provided in the middle foot portion of the core, and the through hole 9 is provided.
When the adhesive 2 is applied to the core, the bonding surface 5 of the core can be completely bonded.

[0015]

As described above, according to the present invention, it has become possible to provide a core for a small electronic component which has a stable adhesive force and is easy to automate.

[Brief description of the drawings]

FIG. 1 is a perspective view of a square-shaped small electronic component core in which a concave portion that cuts out a side surface of a triangular or semi-cylindrical core is provided on a longitudinal edge of a side surface of one core.

FIG. 2 is a perspective view of a triangular or semi-cylindrical core for a small electronic component core having a concave portion formed by cutting out the side surface of a triangular or semi-cylindrical core on a longitudinal edge of a side surface of one of the cores.

FIG. 3 is a perspective view of a square-shaped small-sized electronic component core in which a through hole penetrating the thickness of the core is provided in a foot portion of one of the cores.

FIG. 4 is a perspective view of a small-sized electronic component core in the shape of a star, in which a through hole penetrating the thickness of the core is provided in a foot portion at the center of one core.

FIG. 5 is a sectional view taken along the line BB of FIG. 4;

FIG. 6 is a perspective view showing a bonding state in which an adhesive is applied to a bonding portion of a conventional small-shaped electronic component core having a square shape.

FIG. 7 is a perspective view showing a bonding state in which an adhesive is applied to a bonding portion of a conventional small-sized electronic component core having the shape of the letter L.

8 is a sectional view taken along the line AA in FIG. 7;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Core 2 Adhesive 3 Air core coil 4 Wire 5 Joining surface 6 Air core part 7 Triangular prism concave part 8 Semicircular column concave part 9

Claims (2)

(57) [Claims] 1. A closed magnetic circuit core having a substantially rectangular parallelepiped outer shape and a cross-shaped sunshade formed by abutting two core members with legs of the core member, and storing the coil member in the closed magnetic circuit core. In one of the small electronic components, one of the core members has a cutout recess substantially perpendicular to the outer surface from an outer edge of an outer surface of the core substantially perpendicular to the leg portion to an abutting surface of the leg portion with the other core member. The butting surface of the leg of the other core member, when combined with the one core member, provides a bottom substantially perpendicular to the cutout recess; A small electronic component, wherein the closed magnetic circuit cores are fixed to each other by applying an adhesive to a bottom portion of the small electronic component, and an outer shape of the small electronic component is determined by an outer shape of the closed magnetic circuit core. 2. A closed magnetic circuit core having a substantially rectangular parallelepiped outer shape and a cross section with a sun-shape formed by abutting two core members with legs of the core member, and accommodating a coil member in the closed magnetic circuit core. In one of the small electronic components, one of the core members has a through hole substantially perpendicular to the outer surface from an outer edge of an outer surface of the core substantially perpendicular to the leg portion to an abutting surface of the leg portion with the other core member. The butting surface of the leg of the other core member provides a bottom substantially perpendicular to the through hole when combined with the one core member. A small electronic component, wherein the closed magnetic path cores are fixed to each other by applying an adhesive thereto, and an outer shape of the small electronic component is determined by an outer shape of the closed magnetic path core.