JPH0418229Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a power cord connector configured to prevent noise from flowing into and out of the power source.

[Prior art]

This type of device can be roughly divided into (a) those in which a coated wire is wound around a ferrite core to form a coil, and (b) those in which a through hole is provided in the ferrite core and the coated wire is inserted through it, and each has its advantages and disadvantages. are doing.

It is possible to remove high frequency noise with a small and simple configuration, and has a large current capacity.
The insulated wire insertion type is advantageous. As this type of noise removal plug, a device described in Japanese Utility Model Application Publication No. 57-22178 is known.

The above-mentioned known technology is applied to an insertion plug for a two-core electric wire, and includes a magnetic bead inserted through both of the two insertion blades provided on the plug, and an individual of the two insertion blades. Consists of magnetic beads to be inserted,
It has a structure in which these components are housed within a two-piece plug lid.

[Problem that the invention attempts to solve]

According to the above-mentioned known technology, since the magnetic beads are housed and protected within the plug lid, the magnetic beads are less likely to be damaged, and are effective against both normal mode noise and common mode noise. However, since the magnetic beads are attached directly to the bare insertion blade, some consideration must be given to electrical insulation, and the number of man-hours required for assembly is large. There is a problem.

This idea was created in view of the above circumstances.
There is no risk of damage to the magnetic material (ferrite core), it is effective against both normal mode noise and common mode noise, it is extremely easy to electrically insulate, and it requires less man-hours for assembly. The present invention aims to provide a power cord connector with excellent productivity and a noise removal function.

[Means for solving problems]

In order to achieve the above object, the power cord connector for noise removal of the present invention constitutes a cylindrical noise filter using a ferrite core, and the cylindrical noise filter has two openings at one end and two openings at the other end. The end is shaped to have one opening that communicates with the two openings, and the ends of two covered electric wires are inserted into the one opening, and each of the two electric wires is connected to the two openings. The filter is pulled out from the opening, the coating on each tip is removed, the terminal fittings are connected, and at least a portion of the filter and the terminal fittings are buried, and a connector is molded from synthetic resin.

[Effect]

In the connector configured as described above, (a) the noise filter made of a ferrite core is embedded in the synthetic resin, so there is no risk of damage.

(b) Since there is a part where both two-core electric wires are inserted through the holes of the ferrite core, it is effective in preventing common mode noise, and moreover,
Since there are places where each core wire is inserted through a hole in the ferrite core, it is also effective in removing normal mode noise.

(c) Since the structure is such that the covered wire is inserted through the hole in the ferrite core, the electrical insulation between the wires will not be adversely affected without taking any special measures (although the ferrite core is a high resistance material, (It is not necessarily perfect as an insulator.)

(d) It has a structure in which the filter made of ferrite core is embedded and molded in synthetic resin together with the terminal fittings, so it has excellent productivity.

〔Example〕

1 and 2 each show one embodiment of the present invention. FIG. 1 shows an embodiment in which the present invention is applied to a female connector, and FIG. 2 shows an embodiment in which the present invention is applied to a male connector (so-called plug).

1 is a cylindrical filter made of a ferrite core. FIG. 3 is a sectional view of the filter 1, and FIG. 4 is a perspective view of the same.

The filter 1 of this example has a cylindrical shape as a whole, and a single hole 1a is opened in one end surface. The above-mentioned single hole 1a is divided into two, and each bifurcated hole 1b, 1b' opens at the other end face.

As shown in Figure 1, the tip 2 of the two-core insulated wire
Divide a and 2b into two. As shown by arrow A in Figure 3,
Insert the tips 2a and 2b of the covered wire together into the single hole 1a, and
are inserted into the forked holes 1b and 1b' as shown by arrows B and B', respectively, and pulled out.

The tip portions 2a, 2 pulled out as shown in FIG.
(b) Strip off the coating from the tip of each, and crimp terminal fittings 3a and 3b for female connectors, respectively.

The above-described components are arranged in a mold (not shown), and synthetic resin 4 is injection molded to construct a female connector in which the above-mentioned components are embedded.

FIG. 2 shows an embodiment different from the above, in which the filter 1 made of the same ferrite core as in the previous example is used.
In this example, terminal fittings 5a and 5b for male connectors are crimped onto the tips of two coated wires, respectively, and embedded in synthetic resin 4' to form a male connector.

FIGS. 5 and 6 show a filter 6 made of ferrite core in a further different embodiment, with FIG. 5 being a sectional view and FIG. 6 being a cutaway perspective view.

The filter 6 of the present invention is different from the bifurcated holes 1b and 1 of the previous example.
Components corresponding to b' are parallel holes 6b, 6b'. The filter 6 of this example also provides the same effects as the filter 1 of the previous example, and is easier to mold with a ferrite core than the previous example.

[Effect of idea]

As detailed above, when the present invention is applied, (a) the noise filter made of ferrite cores is embedded in the synthetic resin, so there is no risk of damage, and (b) two-core wires are connected together. There is a part that is inserted into the hole of the ferrite core, so it is common mode.
It is effective in preventing noise, and since there are places where each of the two-core electric wires is inserted through a hole in the ferrite core, it is also effective in removing normal mode noise. Since the structure is such that it is inserted through the hole in the core, the insulation between the wires will not be adversely affected without taking any special measures. Since it is a buried and molded structure, it is suitable for mass production, and has excellent productivity and has excellent practical effects in that quality uniformity is guaranteed.

[Brief explanation of the drawing]

1 and 2 are explanatory views of one embodiment of the present invention, respectively. FIG. 3 is a sectional view of a filter, which is a common component in the two embodiments described above, and FIG. 4 is a perspective view of the same. FIG. 5 is a cross-sectional view of a filter in a further different embodiment, and FIG. 6 is a perspective view of the same. 1...Filter, 1a...Single hole, 1b, 1
b'...Bifurcated hole, 2...2 core covered wire, 3a, 3
b...Terminal fitting, 4,4'...Synthetic resin, 5a,
5b...Terminal fitting, 6...Filter, 6b, 6
b′……Parallel hole.

Claims (1)

[Scope of utility model registration request] A cylindrical noise filter is constituted by the ferrite core, and the cylindrical noise filter has two parts at one end.
The shape has two openings and one opening communicating with the two openings at the other end, and the ends of the two covered electric wires are inserted into the one opening, and the two electric wires are inserted into the opening. Each of the filters is pulled out from the two openings, the coating at the tip of each is removed, a terminal fitting is connected, and at least a portion of the filter and the terminal fitting is buried, and a connector is molded from synthetic resin. A power cord connector for noise elimination featuring the following.