JP2737738B2 - Manufacturing method of coil parts - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a method for manufacturing a coil component, for example, a coil component such as a choke coil and a transformer.

[0002]

2. Description of the Related Art Generally, a coil component requires both ends of a winding to be wound around a lead terminal. At this time, if the diameter of the winding is small (for example, 0.2 to 0.6 mm), the ganging operation is easy and no problem occurs.

[0003]

However, if the diameter of the winding is large (for example, 0.7 mm or more), it becomes difficult to perform the work such as bending of the winding, and it is difficult to bring the winding into close contact. It becomes difficult. Therefore, there is a problem that the height of the kinked portion is increased, and the height of the coil component is increased when the coil component is mounted on a printed wiring board or the like.

Accordingly, an object of the present invention is to provide a coil component capable of suppressing the height of the entangled portion of a winding (especially when it is thick) so as to be short when mounted on a printed wiring board or the like. It is to provide a manufacturing method of.

[0005]

To solve the above object, according to an aspect of manufacturing method of the coil component according to the present invention, after tying the winding to the lead terminal, the lead terminal is Ki設the bobbin
Before each hole of the straightening jig provided with the same number of holes
A jig for straightening the coil part while inserting the lead terminal
The pressing, characterized in that the tying portion of the winding closely between windings against the bobbin side.

[0006]

According to the above-mentioned method, after the winding is wound on the lead terminal, the winding is pressed against the bobbin.
The lashes are compressed and the gaps formed in the lashes are eliminated. As a result, the windings are tightly tied and the height of the kinked portion is reduced.

[0007] Further, by employing a straightening jig provided with a hole, it is easy to press and shrink the lash portion and it is possible to cope with windings of various diameters.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a method for manufacturing a coil component according to the present invention will be described below with reference to the accompanying drawings. The coil component shown in FIG. 1 is a choke coil in which a plurality of windings having the same diameter and the same number of turns are connected in series to the same bobbin.

A bobbin 1 made of resin comprises a cylindrical body 2, flanges 3, 4 provided at both ends of the body 2, and partition plates 5, 6, 7 for separating windings wound around the body 2. Consists of The windings 10 and 11 wound around the body 2 of the bobbin 1 are connected in series, and their end portions 10a and 11a are respectively wrapped around lead terminals 20a and 20b established on the bottom surface of the flange 3. . Similarly, the winding 1 wound around the body 2 of the bobbin 1
2, 13 are connected in series, and their end portions 12a, 13a
Are the lead terminals 20d, which are respectively formed on the bottom surface of the collar 4,
20c. The diameter of windings 10 to 13 is approximately
If it exceeds 0.7 mm, it will be difficult to perform processing such as bending of the windings 10 to 13 as shown in the drawing, and it will be difficult to adhere the terminal portions 10a to 13a, which are the kinked portions, in close contact.

Therefore, as shown in FIG. 2, with the coil components supported by, for example, an automatic winding machine, the lead terminals 20a to 20d are pressed down onto the correction jig 30 with the lead terminals 20a to 20d downward.
The correction jig 30 is provided with four holes 31 into which the lead terminals 20a to 20d are inserted. The opening of the hole 31 is inclined in a mortar shape, and the lead terminals 20a to 20d are formed.
Are designed to be easily inserted and capable of accommodating windings of various diameters.

When the coil component is pressed against the correction jig 30, a terminal portion 10a which is a helical portion shown in FIG.
Corresponds to the mortar-shaped inclined surface or upper end surface of the opening of the hole 31, and is pushed up toward the bobbin 1 and shrunk, so that the adjacent portions are closely attached. Thereafter, even if the coil component is separated from the correction jig 30, the adjacent portion of the terminal portion 10a is in a close contact state as shown in FIG. Will be lower. Similarly, the heights of the end portions 11a to 13a are also reduced.

According to the evaluation results carried out by the inventor, the height of the end portions 10a to 13a of the lashing portion was 3.0 to 3.5 mm before the coil component was pressed against the correction jig 30, and became 2.0 to 2.5 mm after the pressing. Improved. Thus, a coil component in which the height of the terminal portions 10a to 13a, which are the lash portions, is low is obtained. When this coil component is mounted on a printed wiring board, etc.,
The height of the end portions 10a to 13a is reduced, and the height of the component is reduced.

The method of manufacturing a coil component according to the present invention is not limited to the above-described embodiment, but can be variously modified within the scope of the invention. In particular, the correction jig is not limited to the above-described embodiment, and various shapes are selected according to the specifications of the coil component.

[0014]

As apparent from the above description, according to the present invention, after the winding is wound on the lead terminal, the lashing portion of the winding is pressed against the bobbin, so that the lashing portion is compressed. As a result, the windings are tightly attached to each other, and the height of the kinked portion can be reduced. As a result, a short coil component can be easily manufactured when mounted on a printed wiring board or the like.

Further, the coil component is pressed against the correction jig while inserting the lead terminal into the hole provided in the correction jig, and the helical portion of the winding is pressed against the bobbin to make the gap between the windings dense. This makes it possible to more easily manufacture a short coil component when mounted on a printed wiring board or the like.

[Brief description of the drawings]

FIG. 1 is a perspective view showing one embodiment of a method for manufacturing a coil component according to the present invention, and showing the coil component immediately after a winding operation is completed.

FIG. 2 is a perspective view showing a state where a coil component is pressed against a correction jig.

FIG. 3 (A) is a partial perspective view showing a winding state of a winding before pressing a coil component against a correction jig, and FIG. 3 (B) is a perspective view showing a winding state after pressing a coil component against the correction jig. FIG.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Bobbin 2 ... Body part 10, 11, 12, 13 ... Winding 10a, 11a, 12a, 13a ... Termination part (barrel part) 20a, 20b, 20c, 20d ... Lead terminal 30 ... Correction jig 31 ... Hole

Claims (1)

(57) [Claims] 1. A method of manufacturing a coil component comprising: a winding; a bobbin having the winding wound around a body; and a lead terminal provided on the bobbin. And then put it on the bobbin
Straightening with the same number of holes as the number of lead terminals established
Insert the lead terminal into each of the holes of the jig
A method of manufacturing a coil component , wherein the coil component is pressed against a straightening jig, and the helical portion of the winding is pressed against the bobbin to make the windings denser.