JPH0632654Y2 - Coil parts - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a coil component used for an inductor, a choke coil or the like.

(Prior Art) As for a conventional coil component, as shown in FIG. 6 as an inductor, a coil 2 made of a round wire is wound around a resin bobbin 1 and a terminal 3 is implanted in the bobbin 1. Twist the ends of the coil 2 onto the bobbin 1 and solder it onto the bobbin 1.
And the periphery was molded with resin 5.

(Problems to be Solved by the Invention) In this conventional structure, it is necessary to pull out the end portion of the coil 2 and entangle it with the terminal 3, which is troublesome, and
According to this structure, there is a limit to miniaturization, and if the inductor or the like is configured by this coil component structure,
As shown in FIG. 7, the floor area determined by the vertical and horizontal dimensions a and b is large, and the height h is also large, so that it is not possible to meet the demand for surface mounting on a printed circuit board.

SUMMARY OF THE INVENTION In view of the above problems of the prior art, it is an object of the present invention to provide a coil component having a structure in which a winding lead-out portion is unnecessary, a manufacturing process is simplified, and a size reduction is achieved.

(Means for Solving the Problems) In order to achieve the above object, the present invention comprises one or more spiral air-core coils made of a self-bonding rectangular wire and two terminal plates. Of the insulation coating on the inner and outer ends of the air core coil is sandwiched between a pair of rising pieces forming a pair of terminal plates, and the other end is sandwiched between the insulation coating stripped portion on the outer end of the air core coil. The insulating coating stripping portion at the inner end of the air-core coil and the coil outer peripheral surface are sandwiched between a pair of rising pieces forming a pair of plates, and the insulating coating stripping portions are soldered to the terminal plates, respectively. To do.

In the present invention, a bent portion may be provided at the outer end and the inner end of the air-core coil to engage between the rising pieces.

(Operation) As described above, in the coil component according to the present invention, since the coil is the spiral air-core coil made of the spiral self-bonding rectangular wire, the coil itself has a block shape and is maintained. Also,
By fitting a pair of rising pieces to the block-shaped air-core coil, the terminal plates are mechanically combined, and electrically connected and integrated by the soldering portion.

By providing the bent portions for locking the rising pieces at the inner end and the outer end of the air-core coil, it is possible to prevent the insulation coating of the rectangular wire from being melted and separated by the heat of fusion during soldering.

(Embodiment) FIGS. 1 to 3 are views for explaining an embodiment of a coil component according to the present invention. FIG. 1 is a plan view, FIG. 2 is a sectional view of a self-bonding rectangular wire, FIG. 3 is an assembly process diagram of the coil component.

As shown in FIG. 1, an air-core coil 10 of the present invention is a self-bonding rectangular wire 11 wound in a spiral shape.
As shown in FIG. 2, a wire 12 made of, for example, copper or the like having an insulating coating 13 such as a polyamideimide resin film on the surface thereof is used, and as shown in FIG. (Not shown) is subjected to a solvent treatment such as alcohol or a treatment of heating to, for example, about 200 ° C. while being wound in a spiral shape, so that the insulating coating 13 of layers adjacent to each other in the inner and outer directions is formed.
They are fixed to each other, whereby the spiral air-core coil 10 in which the rectangular wires 11 are closely adhered and integrated is obtained.

As shown in FIG. 3 (B), the air-core coil 10 is formed by removing the insulating coatings 13 of the parts c and d corresponding to the outer surface of the outer end and the inner surface of the inner end by machining before forming the spiral shape. Aside
As shown in FIG. 3 (B) and FIG. 3 (C), two pairs of rising pieces 15 formed on the lead frame 14 for the terminal board are paired.
The air-core coil 10 is set on the lead frame 14 by sandwiching two opposite portions of the air-core coil 10 between the parts 16, 16, 17 and 18. In this case, an insulating paper 19 that secures the insulation between the air-core coil 10 and the lead frame 14 is attached in advance. In addition, the outer rising piece 15 of one set of the lead frame 14 abuts on the insulating coating peeling portion c at the outer end of the air-core coil 10, and the inner rising piece 17 of the other set insulates the inner end of the air-core coil 10. The air-core coil 10 is set on the lead frame 14 so as to come into contact with the coating stripping portion d,
The insulating coating stripped portions c and d are connected to the rising pieces 15 and 17 by the solders e and f.

When soldering is performed in this manner, as shown in FIG. 1, bent portions g and h are formed at the outer end and the inner end of the air-core coil 10, and the bent portions g and h are respectively provided with rising pieces 15, By locking it to 17, the insulating coating 13 is melted by the heat of melting during soldering and the air-core coil 1
It is possible to prevent 0 from being scattered like a two-dot chain line i.

After the lead frame 14 is attached to the air-core coil 10 in this manner, cutting and bending are performed using a mold, and FIG.
As shown in (D), the left and right terminal plates 20, 21 are divided.
To obtain a coil component combined with the air-core coil 10. Each of the terminal boards 20 and 21 of this embodiment is formed with two surface mount type soldering parts j and k, but each of them may be one, and the soldering parts j and k are not necessarily required. It does not have to be a surface mount type. The coil component of the present embodiment is shown as being used for an inductor described later that is configured by being combined with the core, so that the coil components on both sides of these terminal plates 20 and 21 are perpendicular to each other. Positioning pieces 22 and 23 that are bent are provided.

FIG. 4 is an exploded perspective view of an inductor which is an application example of the coil component, and FIG. 5 is a perspective view showing its assembled state. 4 and 5, 24 and 25 are split cores, 26 and 27 are disassembled cores 24 and 25, and the air-core coil 10.
Insulating paper that insulates the terminal boards 20 and 21 from each other, and 28 is a spacer ring made of insulating paper.

This inductor is combined as follows. First, the hole 1 of the insulating paper 27 is fitted into the core portion 25b of the split core 25 to mount the insulating paper 27 in the recess 25a of the split core 25. Next, the terminal plates 20 and 2 combined with the air-core coil 10 are mounted thereon.
The rising pieces 16 and 17 of 1 are fitted on the outer side of the vertical pieces m and m of the insulating paper 27, and both sides of the terminal boards 20 and 21 are the insulating paper 2
7 between the vertical pieces n, n, and the positioning piece 2
The split core 25 is set between 2 and 23 by being sandwiched by the vertical pieces p, p. With this structure, the air-core coil 10 is positioned with respect to the split core 25 in the arrow A direction and the arrow B direction in FIG.

Next, the spacer ring 28 is attached to the terminal plate 20 at its lower edge.
It is attached so as to abut the upper surface of 21 and surround the air-core coil 10. On the other hand, the insulating paper 26 is previously attached to the recessed portion 24a and the core portion 24b of the split core 24 in the same manner as the insulating paper 27 is attached to the split core 25.
The split core 24 is mounted so that the vertical pieces m, m of the above are inside the rising pieces 16, 17. In this way, the split core 24,
25 is sandwiched in between by the air-core coil 10 to be in a combined state, and as shown in FIG. 5, a tightening tape 30 is wound around the outer circumference of the core. In this case, the height of the spacer ring 28 is set to be larger than the distance between the insulating papers 26 and 27, so that the terminal plates 20, 2 can be connected via the spacer ring 28.
1 is pressed against the split core 25 via the insulating paper 27.

The inductor having such a structure can be constructed in a very small size. Specifically, the dimensions of each part shown in Fig. 7 a = 31.5 mm, b
= 28.0mm, h = 31.0mm, the inductor using the coil component of the present invention has the same characteristics, a = 29.0mm, b = 27.0m
It can be configured with a size of m, h = 9.8 mm, and the area is about 11%
The height was reduced, and the height could be reduced to about 1/3 of the conventional product.

Although the terminal plates 20 and 21 are attached to one air-core coil 10 in the above-described embodiment, two or more air-core coils may be overlapped and a pair of terminal plates 20 and 21 may be combined therewith.

(Advantages of the Invention) According to claim 1, the terminal plates are mechanically combined by fitting the pair of rising pieces that are paired with the block-shaped and spiral-shaped air-core coil, and the electrical connection is made by the soldering portion. Since it is connected to the terminal, there is no need for a portion to be drawn out to the terminal, and no twisting work is required, so that the manufacturing process is simplified.
Further, since the coil is formed by integrally forming the self-bonding rectangular wire in a spiral shape, even a coil component having a relatively large current capacity can be configured compactly and downsized.

According to the second aspect, since the bent portions for locking the rising pieces are provided at the inner end and the outer end of the air-core coil, it is possible to prevent the insulation coating of the rectangular wire from being melted and melted by the heat of fusion during soldering. Workability is improved because no jig is required to prevent crushing.

[Brief description of drawings]

FIG. 1 is a plan view showing an embodiment of a coil component according to the present invention, FIG. 2 is a partially cut perspective view showing a self-bonding rectangular wire required in the present invention, and FIG. 3 is a manufacturing process of the present invention. FIG. 4, FIG. 4 and FIG. 5 are an exploded perspective view and an assembled perspective view of an inductor constructed by using the coil component of the embodiment, respectively, and FIG. 6 is a cross section of an inductor using a conventional coil component. FIG. 7 is a perspective view thereof. 10: air-core coil, 11: self-bonding rectangular wire, 12: wire material, 13: insulating coating, 15-18: rising piece, 20, 2
1: terminal plate, c, d: insulating coating peeling portion, e, f: solder,
g, h: bent part

Claims (2)

[Scope of utility model registration request] 1. A self-bonding rectangular wire comprising one or more spiral air-core coils and two terminal plates, wherein the insulating coatings on the inner and outer ends of the air-core coil are peeled off to form one terminal. The air-core coil inner end is sandwiched between a pair of rising pieces forming a pair of plates and the insulating coating peeling portion of the outer end of the air-core coil and the inner circumferential surface of the coil being sandwiched between the pair of rising pieces forming a pair of terminal plates. The coil component, wherein the insulation coating peeling portion and the coil outer peripheral surface are sandwiched, and the insulation coating peeling portion is soldered to each of the terminal plates. 2. The coil component according to claim 1, wherein a bent portion for locking between the rising pieces is provided at an outer end and an inner end of the air-core coil.