JPH11219822A - Toroidal coil - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a toroidal coil, in which the lead lines of a coil being lead terminals can be always fixed to constant places, and working capability in manufacture can be improved. SOLUTION: A toroidal core 1 is placed on an insulating member 5, in which a pair of faced circular-arc-shaped projecting parts 6a and 6b are provided at the outer periphery of a ring-shaped disc, and holes 7a and 7b are formed at the centers of the circular-arc-shaped projecting ports 6a and 6b, and they are integrated. Then, an electric wire 3 is wound around this, and lead lines 4a and 4b at the both edges of the electric wire 3 are put through the holes 7a and 7b and fixed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a toroidal coil, and more particularly, to a configuration of a terminal of a lead wire of the toroidal coil.

[0002]

2. Description of the Related Art A toroidal coil of this type is formed by uniformly winding an electric wire around a toroidal core, and is generally used as an inductor component for noise suppression in electronic equipment.

FIG. 3 is an external perspective view of a conventional toroidal coil. In FIG. 3A, a coil 2 is formed by winding a thick wire 3 around the toroidal core 1 several tens of times, and the lead wires 4a and 4b at both ends of the wire 3 are extended to form a toroidal coil 10 as a lead terminal. Was.

[0004] Further, as shown in FIG.
(A) An insulating terminal plate 25 for fixing lead wires 4a and 4b serving as lead terminal portions of the toroidal coil 10 is attached, and the lead wire 4 is inserted into a hole 26 formed in the terminal plate 25.
The toroidal coil 11 was formed by loosely fitting a and 4b.

[0005]

However, when the lead wire at both ends of the coil around which the wire is wound is extended to be a lead terminal, the wire is entangled with each other during the spring bag or winding habit of the wire or during storage. The lead wires are bent, and the directions of the lead terminals are not uniform, which has an effect on quality and impairing work efficiency during manufacturing. Further, simply attaching the terminal plate may cause the terminal plate to come off, so that a manufacturing step of bonding and fixing the terminal plate on the coil must be added.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide an inexpensive toroidal coil which solves the above-mentioned problems, does not cause a problem in quality, and does not require a manufacturing step of bonding and fixing a terminal plate. I do.

[0007]

The present invention relates to a toroidal coil formed by winding an electric wire around a toroidal core,
A pair of opposing arc-shaped protrusions are provided on the outer periphery of the ring-shaped disk, and a toroidal core is placed and integrated on an insulating member having a hole formed at the center of the arc-shaped protrusion, and an electric wire is placed on the toroidal core. And a toroidal coil in which lead wires at both ends of the electric wire are fitted and fixed in the holes.

The present invention also relates to a toroidal coil formed by winding an electric wire around a toroidal core, wherein a pair of arc-shaped convex portions are provided on opposing circumferences of a cylindrical short tube, and the arc-shaped convex portions are provided. The toroidal core is fitted and integrated with the inner periphery of the insulating member with a hole in the center of it, and the wire is wound from above,
A toroidal coil in which lead wires at both ends of the electric wire are fitted through the holes and fixed.

Further, the present invention is the above-mentioned toroidal coil, wherein a slit is formed between the hole of the arc-shaped convex portion and the outer shell.

According to the present invention, the insulating member and the toroidal core are integrated, a winding is applied from above, and the lead wire of the terminal is loosely fitted into the hole of the arc-shaped convex portion provided on the insulating member. A toroidal coil in which the positioning and fixing of the lead wire is reliable can be obtained. In addition, since the slit is formed between the hole of the arc-shaped convex portion and the outer shell, it is easy to fit the lead wire of the terminal into the hole.

[0011]

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

First, a first embodiment of the present invention will be described.

FIG. 1 is an external perspective view of a toroidal coil according to a first embodiment of the present invention. In FIG. 1, a toroidal coil 100 has an insulating member 5 having substantially the same shape and a slightly smaller diameter on the ring-shaped plane of the toroidal core 1 and having arc-shaped convex portions 6a and 6b provided at opposite ends on the outer periphery.
Are tightly integrated, and the electric wire 3 is wound therefrom,
The coil 2 is formed.

The lead wires 4 at both ends of the coil 2
a, 4b are drawn upward through the holes 7a, 7b of the arc-shaped convex portions 6a, 6b formed on the outer peripheral portion of the insulating member 5.

In this case, the lead wires 4a and 4b of the terminal are
Via the slits 8a and 8b, the holes 7a and 7b are fitted. The groove gap between the slits 8a and 8b is smaller by 20% to 35% than the diameter of the electric wire.

Therefore, the lead wires 4a and 4b are
a, 7b, the lead wires 4a, 4b
a, 7b. The material of the insulating member 5 is preferably a resin material having heat resistance, but may be a paper press plate.

Next, a second embodiment of the present invention will be described.

FIG. 2 is an explanatory view of a toroidal coil according to a second embodiment of the present invention. FIG. 2 (a) is an external perspective view of the toroidal coil, and FIG. 2 (b) is an insulating diagram used for the toroidal coil. It is an external appearance perspective view of a member. The toroidal coil of the present embodiment is of a type that is mounted vertically on a printed circuit board or the like.

In FIG. 2, an insulating member 15 is fitted outside the toroidal core 1. At the end of the insulating member 15,
The arc-shaped convex parts 16a and 16b are formed.

Holes 17a and 17b are formed substantially at the center of the arc-shaped convex portions 16a and 16b.
Slits 18a, 18b are provided between the outer shells 7a, 17b.
Are formed, and the lead wires 14a, 14 of the terminal of the coil 12 are formed.
b, through the slits 18a, 18b, the holes 17a,
17b.

The material of the insulating member 15 is preferably a resin material having heat resistance, but may be a paper press plate.
The thickness of the insulating member 15 may be determined experimentally from the size and specifications of the toroidal coil, the thickness of the wire to be wound, and the like.

The arc-shaped projections 6a, 6 in FIGS.
Each of b, 16a, and 16b has an arc shape, but may have a rectangular shape. Further, the slits 8a, 8b, 18a, 18b
Is preferably located substantially parallel to the outer surface of the toroidal core, and the directions are preferably different between the two wings of the arc-shaped convex portion. However, the direction is not particularly limited.

[0023]

As described above, according to the present invention, the lead wire of the coil can be fixed at a fixed position without performing an operation such as bonding, and the quality is improved, the work efficiency is improved, and the cost is reduced. It has become possible to provide a simple toroidal coil.

[Brief description of the drawings]

FIG. 1 is an external perspective view of a toroidal coil according to a first embodiment of the present invention.

FIG. 2 is an explanatory diagram of a toroidal coil according to a second embodiment of the present invention. FIG. 2A is an external perspective view of a toroidal coil. FIG. 2B is an external perspective view of the insulating member.

FIG. 3 is an explanatory diagram of a conventional toroidal coil. FIG. 3 (a)
1 is an external perspective view of a conventional toroidal coil. FIG. 3 (b)
3 is an external perspective view of an insulating member.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Toroidal core 2, 12 Coil 3, 13 Electric wire 4a, 4b, 14a, 14b Lead wire 5, 15 Insulating member 6a, 6b, 16a, 16b Arc-shaped convex part 7a, 7b, 17a, 17b Hole 8a, 8b, 18a, 18b slit 10, 11, 100, 101 toroidal coil 25 (insulated) terminal plate 26 hole

Claims (3)

[Claims] 1. A toroidal coil formed by winding an electric wire around a toroidal core, wherein a pair of opposed arc-shaped protrusions are provided on the outer periphery of a ring-shaped disk, and a hole is formed at the center of the arc-shaped protrusion. A toroidal coil comprising a toroidal core placed on and integrated with an insulating member formed as described above, an electric wire wound around the toroidal core, and lead wires at both ends of the electric wire inserted through the holes and fixed. 2. A toroidal coil formed by winding an electric wire around a toroidal core, wherein a pair of arc-shaped protrusions are provided on opposing circumferences of a cylindrical short tube, and a hole is formed at the center of the arc-shaped protrusion. A toroidal core is fitted to and integrated with the inner periphery of the insulating member formed with the above, a wire is wound therefrom, and lead wires at both ends of the wire are fitted through the holes and fixed. . 3. The toroidal coil according to claim 1, wherein a slit is formed between the hole and the outer shell.