JPH06260350A - Choke coil - Google Patents

Abstract

PURPOSE:To simplify a structure by assigning a core an a printed board and, with a printed pattern formed on the printed board and the lead wire electrically connected to the printed pattern, forming a coil around the core. CONSTITUTION:A core 5 is, for fear of displacement of a ribbon electric wire 6, provided with a step 7 on the bottom surface corresponding to assignment position of a normal mode choke coil of a printed board 8, and a print pattern is printed, and, on the printed board 8 an the opposite surface side of print pattern 8a, the core 5 is placed. Along the outer periphery of the core 5, a ribbon electric wire is assigned, and the both ends of the lead wire are electrically connected to the print pattern by soldering 9, so that, around the core 5, spiral core is formed with the print pattern and the ribbon electric wire 6, for constituting a normal mode choke coil. Thus, the number of parts is reduced, and at the same time, manufacture of choke coils can be incorporated into a circuit board assembly line, for less number of processes.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a choke coil mounted on a circuit board.

[0002]

2. Description of the Related Art An example of a conventional choke coil is shown in FIG.

In this choke coil, a conductor wire 2 is wound around a core 1 and placed on a stand 4 with lead wires. Both ends of the conducting wire 2 are fixed to lead wires 3. It is attached by connecting the lead wire 3 and the substrate by soldering.

[0004]

In the conventional method, the step of winding the conductor wire 2 around the core 1 is indispensable,
There is a problem that the choke coil must be mounted on the circuit board after manufacturing. Further, there is a problem that the base 4 with the lead wire is indispensable for mounting on the substrate.

The present invention has been conceived in order to solve such a problem, and an object of the present invention is to provide a choke coil having a simpler structure than that of a conventional choke coil and achieving the same effect. is there. Furthermore, it is also an object to reduce the number of parts and incorporate choke coil manufacturing into the circuit board assembly process.

[0006]

In order to solve such a problem, a choke coil according to the present invention has a core arranged on a printed circuit board, a printed pattern formed on the printed circuit board, and a printed pattern formed on the printed circuit board. A winding is formed around the core by an electrically connected lead wire.

[0007]

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

<First Embodiment> Normal Mode Choke Coil FIG. 2 is a perspective view showing an embodiment of a normal mode choke coil according to the present invention, FIG. 3 is a top view thereof, FIG. 4 is a front view thereof, and FIG. 6 is a print pattern diagram of FIG.

As shown in FIGS. 2 to 6, in the normal mode choke coil of the present invention, the core wire 5, the conductor wire 6b is covered with the non-conductive material 6a, the ribbon wire 6, and the printed pattern 8a.
Is formed by the printed circuit board 8 on which is formed.

A gap 7 is provided in the core 5 so that the ribbon electric wire 6 is not displaced. Printed circuit board 8
The printed pattern 8a is printed on the bottom surface of the arrangement position of the normal mode choke coil, and the core 5 is placed on the printed circuit board 8 opposite to the printed pattern 8a. The ribbon electric wire 6 is arranged along the outer periphery of the core 5, both ends of the conductive wire 6b are electrically connected to the printed pattern 8a by solder 9, and the printed pattern 8a and the ribbon electric wire are provided around the core 5. A spiral winding is formed by 6 to form a normal mode choke coil.

Inputs and outputs to the normal mode choke coil are determined by the pattern printed when the printed circuit board 8 is formed.

With the above structure, a normal mode choke coil can be formed in the circuit board manufacturing process, and the number of mounting bases can be reduced.

<Second Embodiment> Common Mode Choke Coil FIG. 7 is a top view showing an embodiment of a common mode choke coil according to the present invention, FIG. 8 is a sectional view taken along the line BB 'of FIG. 7, and FIG. 9 is a front view. FIG. 10 is a print pattern diagram.

As shown in FIGS. 7 to 9, in this common mode choke coil, the core 10 and the conductive wire 11b are made of a non-conductive material 11.
The ribbon electric wire 11 covered with a and the printed pattern 13a printed on the printed circuit board 13 are formed. The core 10 has a ring shape. Similar to the first embodiment, a winding is formed by electrically connecting the print pattern 13a and the ribbon electric wire 11 with solder 12, but in the second embodiment, the print pattern 13a is formed so that the winding direction is reversed. It is applied in two places.

As described above, since the common mode choke coil is formed on the board 13, the common mode choke coil can be formed in the process of manufacturing the circuit board, and the mounting base can be reduced.

Although the above is an embodiment, the present invention can be implemented by appropriately modifying the gist thereof.

For example, the core may be modified, the wire material may be modified, the pattern may be modified, the component mounting surface of the multilayer substrate or the inner layer pattern may be adopted, and the number of windings may be appropriately changed.

[0018]

As described above, since the choke coil can be formed on the circuit board by the core, the wire and the solder, the number of parts can be reduced. Further, since the manufacturing of the choke coil can be incorporated into the circuit board assembly line, the number of steps can be reduced.

[Brief description of drawings]

FIG. 1 is a perspective view showing an example of a conventional technique.

FIG. 2 is a perspective view showing an embodiment of the present invention.

FIG. 3 is a top view showing an embodiment of the present invention.

FIG. 4 is a front view showing an embodiment of the present invention.

FIG. 5 is a sectional view of FIG. 3A-A ′.

FIG. 6 is a print pattern diagram of the substrate according to the present invention.

FIG. 7 is a top view showing an embodiment of the present invention.

FIG. 8 is a sectional view of FIG. 7B-B ′.

FIG. 9 is a front view showing an embodiment of the present invention.

FIG. 10 is a print pattern diagram of the substrate according to the present invention.

[Explanation of symbols]

 1 core 2 winding wire 3 lead wire 4 lead wire pedestal 5 core 6 ribbon electric wire 6a clothing 6b conducting wire 7 gap 8 printed circuit board 8a printed pattern 9 solder 10 core 11 ribbon electric wire 11a clothing 11b conductive wire 12 solder 13 substrate 13a printed pattern

Claims (1)

[Claims] 1. A choke coil formed by winding a coil around a core arranged on a printed board, wherein the core arranged on the printed board and the printed board so as to correspond to the core. A choke coil arranged on the printed circuit board, comprising: a printed pattern formed on the printed circuit board; and a lead wire that is connected to the printed pattern so as to wind around the core.