JPH04253311A - Manufacture of wound inductance part - Google Patents

Abstract

PURPOSE:To realize a part-winding method by which an increase in the manufacturing cost of wound inductance part can be suppressed as much as possible and the inductance of the part can be increased. CONSTITUTION:Dividing plates 31 and 31 are brought into contact with the barrel sections 7a and 7b of a bobbin 2 in the direction perpendicular to the axis of the sections 7a and 7b and one winding is wound around the sections 7a and 7b in a state where the winding is divided in the axial direction by means of the plates 31 and 31. After winding, the plates 31 and 31 are removed form the sections 7a and 7a.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a wire-wound inductance component used as a high frequency noise eliminating element such as a common mode choke coil.

0002

BACKGROUND OF THE INVENTION Conventionally, as shown in FIG. 3, a wire-wound inductance component such as a common mode choke coil has a pair of windings 20 and 21 wound around the body of a bobbin 2 in a center hole 8 (not shown). Supplied with a core attached. The windings 20 and 21 are wound independently between the flanges 5 and 6, and both ends are connected to the terminals 14a and 14b provided on the terminal block 3.
It is connected to the. Note that the winding form shown in FIG. 3 is hereinafter referred to as single winding. By the way, single winding winding 2
0 and 21, there is a problem in that line-to-line stray capacitance occurs and high frequency attenuation characteristics deteriorate.

Therefore, as shown in FIG. 4, each winding 20,
21 is further divided into 20a, 20b and 21a by dividing plates 4, 4.
, 21b. Furthermore, Figure 4
The winding form shown in is hereinafter referred to as split winding. By performing such split winding, line-to-line stray capacitance is reduced and high frequency attenuation characteristics are improved.

0004

[Problems to be Solved by the Invention] However, in the split winding shown in FIG.
A thickness of 1.0 mm is required, and the number of turns is reduced compared to the inductance component shown in FIG. 3 of the same size by the thickness of the dividing plates 4, 4, resulting in a reduction in inductance. Furthermore, it is necessary to create a new mold and separately mold the bobbin 2, which significantly increases manufacturing costs.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a method for manufacturing a split-wound inductance component that can suppress increases in manufacturing costs as much as possible and obtain an inductance equivalent to that of a conventional single-wound component.

[0006]

[Means and Effects for Solving the Problems] In order to solve the above problems, the method for manufacturing a wire-wound inductance component according to the present invention provides a method for manufacturing a wire-wound inductance component in which dividing plates are arranged in the body of a bobbin in a direction perpendicular to the axis of the body. The present invention is characterized in that one winding wire is wound in a state in which it is divided in the axial direction by a dividing plate in contact with each other, and then the dividing plate is removed from the body.

That is, the dividing plate is not formed integrally with the bobbin, but is applied to the body of the bobbin only during winding work.
When the winding work is completed, it is removed from the body. Therefore, there is no need to create a new mold to mold the bobbin, and it is possible to use the conventional single-winding bobbin as is. Also, if the dividing plate is made of metal, 0.3~
A thin plate of about 0.5 mm can be used, the number of turns of the winding is greater than that of conventional split winding, and an inductance equivalent to that of single winding can be obtained.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of a method for manufacturing a wire-wound inductance component according to the present invention will be described with reference to the accompanying drawings. FIG. 1 shows the process of winding a winding wire around the bodies 7a and 7b of a bobbin 2, and the conventional single-winding bobbin 2 shown in FIG. 3 is used. Therefore, the same reference numerals as in FIG. 3 are given to the bobbin 2.

The winding work begins with the spindle 30 of the processing machine.
Attach the center hole 8 of the bobbin 2 to the
1 is moved in the direction of arrow A and brought into contact with the center portions of the trunks 7a and 7b. The dividing plate 31 has a semi-circular arc portion 32 at its tip end corresponding to the outer diameter of the trunk portions 7a and 7b, and this semi-circular arc portion 32
contacts or approaches the outer circumferential surfaces of the trunks 7a, 7b. The dividing plate 31 is a metal plate having a spring property and having a thickness of 0.3 to 0.5 mm.

Next, the wire 19 is pulled out from the nozzle 35, its tip is tied around the terminal 14a and temporarily fixed, and the spindle 30 is rotated. In this way, the winding 20a (see FIG. 2) is wound between the flange 5 and the dividing plate 31, and then the winding 20b is continuously wound between the dividing plate 31 and the flange 6. be done. The end of the winding is cut off to form another terminal 1.
4b. Next, the other winding 21
Similarly, the winding work is performed in the same manner as described above in a state where the wires are divided into 21a and 21b.

When the dividing winding of the pair of windings 20, 21 is completed, the dividing plates 31, 31 return to the positions shown by the solid lines in FIG. Since the thickness of the dividing plate 31 is as thin as 0.3 to 0.5 mm,
Even if the dividing plate 31 is pulled out, the windings 20 and 21 do not lose their divided winding state. For the bobbin 2 which has been subjected to split winding as described above, a pair of U-shaped cores 10
, 10 are inserted into the center hole 8 from both sides to form a closed loop magnetic path. The cores 10, 10 are fixed by locking the spring plate 15.

The wire-wound inductance component according to the present invention is not limited to the embodiments described above, and can be modified in various ways within the scope of the invention. For example, the number of divisions in the split winding may be three or more instead of two. In addition to using the spindle 30, the bobbin may be driven in a manner such that a gear is formed on the outer peripheral surface of the collar portion 6, and the bobbin is rotated via this gear.

Alternatively, instead of abutting the dividing plate against the body of the bobbin from one side, the dividing plate may be brought into contact with the body from both sides so as to surround the body.

[0014]

As is clear from the above description, according to the present invention, a dividing plate is brought into contact with the body of a bobbin, and one winding wire is wound while being divided in the axial direction by the dividing plate. Since the dividing plate is then removed from the body, there is no need to provide the dividing plate integrally with the bobbin, and a conventional single-wound bobbin can be used as is, reducing manufacturing costs accordingly. Furthermore, since the dividing plate can be a thin metal plate, the number of turns in the winding increases compared to when the dividing plate is integrally provided with the bobbin, and it is possible to obtain the same inductance as a conventional single winding. Can be done.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing a winding operation in a method for manufacturing a wire-wound inductance component according to the present invention.

FIG. 2 is an exploded perspective view showing the bobbin and other components after the winding work in FIG. 1 has been completed.

FIG. 3 is a perspective view showing an example of a conventional wire-wound inductance component.

FIG. 4 is a perspective view showing another example of a conventional wire-wound inductance component.

[Explanation of symbols]

2...Bobbin 7a, 7b... body part 10...Core 20, 21...winding wire 31...Dividing plate

Claims (1)

[Claims] Claim 1: A method for manufacturing a wire-wound inductance component in which a winding is wound around the body of a bobbin having a core, comprising: abutting a dividing plate on the body of the bobbin in a direction perpendicular to the axis of the body; A method for manufacturing a wire-wound inductance component, comprising: winding one winding in a state in which it is divided in the axial direction by a dividing plate, and then removing the dividing plate from the body.