JP2016019223A - Noise filter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To hinder electromagnetic noise that propagates a cable by easily attaching the cable in an arbitrary position.SOLUTION: A noise filter comprises: a fixing mechanism 12 that fixes a binding band 11 wound around a cable 1, with a conductor blade 11b thrusting out of the insulation coating 1b of the cable 1; and a fixing mechanism 15 that fixes a binding band 14 wound around a cable 2, with a conductor blade 14b thrusting out of the insulation coating 2b of the cable 2. A capacitor 17 is connected between a conductor plate 13 electrically connected with a conductor 11a one end of which is formed on the binding band 11, and a conductor plate 16 electrically connected with a conductor 14a one end of which is formed on the binding band 14.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a noise filter that suppresses propagation of electromagnetic noise superimposed between two cables, for example.

In general electric equipment, various cables are connected to supply power and perform data communication.
When electromagnetic noise is generated from an electrical device to which such a cable is connected, the electromagnetic noise may be radiated from the cable. Further, when electromagnetic noise is transmitted through the cable, the electromagnetic noise may be conducted to other electric devices and affect the operation of the other electric devices.
On the other hand, extraneous electromagnetic noise enters from the cable, and the electromagnetic noise may reach the electric equipment and affect the operation of the electric equipment.
In this way, the cable connected to the electric device acts as an input / output port for electromagnetic noise.

The electromagnetic noise propagating through the cable is classified into normal mode noise induced between two cable lines and common mode noise induced between a cable and a reference potential surface such as ground.
Among these, a form in which a capacitor is inserted between two cables is known as a noise filter that suppresses propagation of normal mode noise.

  Patent Document 1 below discloses a composite common mode choke coil in which at least two pairs of windings are applied to one closed magnetic circuit core, and 2 on the input side and the output side of the composite common mode choke coil. A line capacitor connected between two cables (cable connected to the composite common mode choke coil), a first line / ground capacitor connected between one cable and the ground terminal, and the other cable There is disclosed a noise filter including a second line and a grounding capacitor connected between ground terminals.

Patent Document 2 below discloses a low-pass filter circuit including a choke coil and a filter capacitor mounted on a printed circuit board of a switching power supply.
In this low-pass filter circuit, the coupling capacity of the metal shield and the choke coil is increased by hollowing out a large circular shape so that the coil and core of the choke coil can be seen from the upper surface of the metal shield covering the top. By drastically reducing the filter circuit, the filter circuit has a high noise attenuation effect that is hardly affected by the metal shield of the switching power supply.

Patent Document 3 below discloses a semiconductor package in which an equivalent bypass capacitor is formed between lead frames by providing an insulating resin between a plurality of lead frames of a semiconductor chip.
The equivalent bypass capacitor suppresses generation and propagation of unnecessary noise in the power supply circuit or the signal transmission circuit.

In Patent Document 4 below, the P conductor and the N conductor are provided on both sides of the central insulator, and the insulator is provided outside the P conductor and the N conductor (upper side and lower side), thereby extending the ground conductor. A noise filter provided with an arrangement is disclosed.
As a result, it is possible not only to provide a Y capacitor between the P conductor and the ground conductor or between the N conductor and the ground conductor, but also to configure an X capacitor between the P conductor and the N conductor. Radiation noise generated in the vicinity can be suppressed.

JP-A-8-32394 (paragraph number [0004], FIG. 1) JP-A-6-104590 (paragraph numbers [0012] to [0013], FIG. 1) JP 2012-23300 A (paragraph number [0012], FIG. 1) JP 2013-219919 A (paragraph numbers [0016] to [0017], FIG. 2)

  Since the conventional noise filter is configured as described above, in the case of Patent Document 1, in order to attach the noise filter to an already laid cable, the laid cable is cut, and then the cable and the present noise are connected. Filters must be connected in series. For this reason, this noise filter cannot be mounted at a position where it is difficult to cut. In addition, since the work of cutting the cable and the work of stripping the insulation coating of the cable are required, there is a problem that a lot of labor is required for mounting the noise filter.

In the case of Patent Document 2, a noise filter is realized by combining a choke coil mounted on a printed circuit board of a switching power supply and a low-pass filter circuit composed of a filter capacitor. Without it, the effect of suppressing noise cannot be exhibited. For this reason, it cannot be applied as a noise filter that suppresses electromagnetic noise propagating through the cable.
In Patent Document 3, since it is necessary to attach an insulating resin having a relative dielectric constant larger than that of the mold resin to the inner lead portion in the semiconductor package, the insulating resin must be fixed to the inner lead portion. There must be. For this reason, it cannot be applied as a noise filter to a cable without an inner lead portion.
Furthermore, in the case of Patent Document 4, a capacitor is formed by sandwiching both sides of a plate-like central insulator with plate-like conductors, so that the plate-like structure can only be fixed inside the housing. It cannot be applied. For this reason, it cannot be attached to an arbitrary position of the cable.

  The present invention has been made to solve the above-described problems, and an object thereof is to obtain a noise filter that can be easily mounted at an arbitrary position of a cable and can suppress electromagnetic noise propagating through the cable. To do.

  The noise filter according to the present invention includes a first band in which a conductor provided with a conductive protrusion member that breaks through the insulation coating of the first cable is formed on one side, and the conductive protrusion member of the first cable. The first fixing mechanism for fixing the first band wound around the first cable in a state where the insulating coating is pierced, and one end electrically connected to the conductor formed on the first band The first conductor plate, the second band formed on one side of the conductor provided with the conductive protrusion member that breaks through the insulation coating of the second cable, and the conductive protrusion member of the second cable. A second fixing mechanism for fixing the second band wound around the second cable in a state of breaking through the insulating coating, and one end electrically connected to the conductor formed on the second band A second conductor plate One end connected to the other end of the first conductive plate, the other end is obtained so as to include a capacitive element which is connected to the other end of the second conductor plate.

  According to the present invention, the first fixing mechanism that fixes the first band wound around the first cable in a state where the conductive protruding member has broken through the insulating coating of the first cable, and the conductive protrusion. A second fixing mechanism for fixing the second band wound around the second cable in a state where the member has broken through the insulation coating of the second cable, and one end is formed on the first band. A capacitive member is disposed between the first conductor plate electrically connected to the conductor and the second conductor plate electrically connected to the conductor having one end formed in the second band. Since it is configured to be connected, there is an effect that electromagnetic noise propagating through the cable can be suppressed by simply mounting it at an arbitrary position of the cable.

It is a perspective view which shows the noise filter by Embodiment 1 of this invention. It is a perspective view which shows the state in which the noise filter of FIG. 1 is attached to the cable. It is sectional drawing which shows the state with which the noise filter of FIG. 1 is mounted | worn with the cable. It is a top view which shows the surface side of the cable binding part (bundling band 11,14, fixing mechanism 12,15) of the noise filter by Embodiment 1 of this invention. It is a top view which shows the back surface side of the cable binding part (bundling band 11,14, fixing mechanism 12,15) of the noise filter by Embodiment 1 of this invention. It is a perspective view which shows the capacitor | condenser mounting part and fixing mechanism 12,15 of the noise filter by Embodiment 1 of this invention. It is a top view which shows the capacitor | condenser mounting part and fixing mechanism 12,15 of the noise filter by Embodiment 1 of this invention. It is explanatory drawing which shows the flow of the electromagnetic noise at the time of mounting | wearing the two cables 1 and 2 with the noise filter of FIG. It is a perspective view which shows the capacitor | condenser mounting part and fixing mechanism 12,15 of the noise filter by Embodiment 2 of this invention. It is a top view which shows the capacitor | condenser mounting part and fixing mechanism 12,15 of the noise filter by Embodiment 2 of this invention. It is a perspective view which shows the capacitor | condenser 17 by which the electrodes 31 and 32 are provided in both ends. It is a perspective view which shows the fixing mechanism 12 and 15 of the noise filter by Embodiment 3 of this invention. It is a perspective view which shows the capacitor | condenser mounting part of the noise filter by Embodiment 3 of this invention. It is a top view which shows a part of noise filter by Embodiment 4 of this invention. It is explanatory drawing which shows the flow of the electromagnetic noise at the time of attaching the noise filter of FIG. 14 to the one cable 1. FIG. It is a top view which shows a part of noise filter by Embodiment 5 of this invention. It is explanatory drawing which shows the flow of the electromagnetic noise at the time of mounting | wearing the two cables 1 and 2 with the noise filter of FIG.

Embodiment 1 FIG.
1 is a perspective view showing a noise filter according to Embodiment 1 of the present invention.
2 is a perspective view showing a state where the noise filter of FIG. 1 is attached to the cable, and FIG. 3 is a cross-sectional view showing a state where the noise filter of FIG. 1 is attached to the cable.
1 to 3, a cable 1 as a first cable is provided with an insulating coating 1b around a core wire 1a.
The cable 2 as the second cable is provided with an insulating coating 2b around the core wire 2a.

The binding band 11 that is the first band is formed of, for example, resin, and the conductor 11a to which the conductive blade 11b that is a conductive protruding member that breaks through the insulating coating 1b of the cable 1 is connected (or fixed) is connected to the back surface (one side). ).
The fixing mechanism 12 is a first fixing that fixes the binding band 11 wound around the cable 1 in a state in which the conductor blade 11b penetrates the insulating coating 1b of the cable 1 (a state in which the conductor blade 11b is electrically connected to the core wire 1a). Mechanism.
A part of the conductor plate 13 which is the first conductor plate is inserted into the fixing mechanism 12 (in FIG. 1, the left half of the conductor plate 13 is inserted into the fixing mechanism 12). The left end is electrically connected to the conductor 11 a formed on the binding band 11.

The binding band 14, which is the second band, is formed of, for example, resin. The binding band 14 is a conductor 14 a to which a conductive blade 14 b that is a conductive protrusion member that breaks through the insulating coating 2 b of the cable 2 is connected (or fixed). Is formed on the back surface (one surface).
The fixing mechanism 15 is a second fixing that fixes the binding band 14 wound around the cable 2 in a state where the conductor blade 14b penetrates the insulating coating 2b of the cable 2 (a state where it is electrically connected to the core wire 2a). Mechanism.
A part of the conductor plate 16 which is the second conductor plate is inserted into the fixing mechanism 15 (in FIG. 1, the right half of the conductor plate 16 is inserted into the fixing mechanism 15). The right end is electrically connected to the conductor 14 a formed on the binding band 14.

The capacitor 17 is a capacitive member having one end connected to the other end of the conductor plate 13 and the other end connected to the other end of the conductor plate 16.
Incidentally, the capacitor 17 and the conductor plates 13 and 16 are fixed by a resin mold 18.

4 is a plan view showing the surface side of cable bundling portions (bundling bands 11 and 14 and fixing mechanisms 12 and 15) of the noise filter according to the first embodiment of the present invention, and FIG. 5 is a first embodiment of the present invention. It is a top view which shows the back surface side of the cable binding part (bundling band 11,14, fixing mechanism 12,15) of the noise filter by.
On the back surface of the binding band 11, a conductor 11a is formed in the longitudinal direction by adhesion or application. A conductor blade 11b is connected (or fixed) to the conductor 11a.
On the other hand, a detent notch 11c is formed on the surface of the binding band 11 to prevent the binding band 11 from loosening by being caught with the stopper claw 12d when the tip side is inserted into the insertion hole 12b of the fixing mechanism 12. Yes.

The resin box 12a is a housing of the fixing mechanism 12. The resin box 12a is provided with an insertion hole 12b into which the binding band 11 is inserted when the noise filter is attached to the cable 1 (see FIG. 2). Yes.
Needless to say, the size of the insertion hole 12 b is larger than the width and thickness of the binding band 14. The insertion hole 12b is provided with a conductor blade insertion notch 12c into which the conductor blade 11b provided on the back surface of the binding band 14 is inserted.
Here, the configuration of the front side and the back side of the binding band 11 and the fixing mechanism 12 has been described, but the binding band 14 and the fixing mechanism 15 have the same configuration as the binding band 11 and the fixing mechanism 12. Therefore, the conductor 14 a and the conductor blade 14 b are formed on the back surface of the binding band 14, and the detent step 14 c is formed on the surface of the binding band 14.
The fixing mechanism 15 includes a resin box 15a, an insertion hole 15b, a conductor blade insertion notch 15c, and a stopper claw 15d.

FIG. 6 is a perspective view showing the capacitor mounting portion and fixing mechanism 12 and 15 of the noise filter according to Embodiment 1 of the present invention, and FIG. 7 is the capacitor mounting portion and fixing mechanism of the noise filter according to Embodiment 1 of the present invention. FIG.
As described above, the capacitor 17 has one end connected to the other end of the conductor plate 13 and the other end connected to the other end of the conductor plate 16, but maintains the connection state between the capacitor 17 and the conductor plates 13 and 16. For this purpose, the capacitor 17 and the conductor plates 13 and 16 are fixed by a resin mold 18. However, the resin mold 18 is not an essential element, and the resin mold 18 may not be formed.

Next, a procedure for attaching the noise filter of FIG.
First, the two cables 1 and 2 to which the noise filter is attached are arranged side by side and wound so that the back side of the binding band 11 that is the cable binding portion is in contact with the cable 1, and the back side of the binding band 14 is in contact with the cable 2. Wrap around.
Next, the binding band 11 is inserted into the insertion hole 12b of the fixing mechanism 12 from the tip portion. At this time, since the conductor blade 11b is formed in the binding band 11, the conductor blade 11b must be inserted so as to be aligned with the conductor blade insertion notch 12c provided in the insertion hole 12b of the fixing mechanism 12. The binding band 11 cannot be inserted into the insertion hole 12b.
Similarly, the binding band 14 is inserted into the insertion hole 15b of the fixing mechanism 15 from the tip portion.

Next, the binding bands 11, 14 are pulled so that the conductor blades 11b, 14b formed on the binding bands 11, 14 break through the insulation coatings 1b, 2b of the cables 1, 2. Wrap around cables 1 and 2. Since the conductor blades 11b and 14b are sharp blades, when the binding bands 11 and 14 are strongly wound around the cables 1 and 2, the insulation coatings 1b and 2b of the cables 1 and 2 are broken.
The conductor blades 11b and 14b break through the insulation coatings 1b and 2b of the cables 1 and 2, so that the conductor blades 11b and 14b come into contact with the core wires 1a and 2a of the cables 1 and 2, and as a result, are formed in the binding bands 11 and 14. The conductors 11a and 14a thus connected are electrically connected to the core wires 1a and 2a of the cables 1 and 2, respectively.

The conductors 11a and 14a formed on the binding bands 11 and 14 are formed on the surfaces of the binding bands 11 and 14 after being electrically connected to the cores 1a and 2a of the cables 1 and 2. The binding bands 11 and 14 are fixed to the fixing mechanisms 12 and 15 by hooking the detents 11 c and 14 c on the stopper claws 12 d and 15 d of the fixing mechanisms 12 and 15.
In addition, after fixing the binding bands 11 and 14 to the fixing mechanisms 12 and 15, you may make it cut | disconnect the front-end | tip part of the binding bands 11 and 14 jumping out from the insertion holes 12b and 15b.
This completes the mounting of the noise filter on the cables 1 and 2, but the core wire 1 a of the cable 1 and the core wire 2 a of the cable 2 are connected in an alternating manner through the capacitor 17.

Here, FIG. 8 is an explanatory diagram showing the flow of electromagnetic noise when the noise filter of FIG. 1 is attached to the two cables 1 and 2.
By attaching the noise filter of FIG. 1 to the two cables 1 and 2, the core wire 1a of the cable 1 electrically connected to the conductor 11a and the conductor blade 11b, and the conductor 14a and the conductor blade 14b are electrically connected. Since the core wire 2a of the connected cable 2 is connected in an AC manner through the capacitor 17, the capacitor 17 can be connected between the two cables 1 and 2.
Since the noise can be circulated by connecting the capacitor 17 between the two cables 1 and 2, the propagation of normal mode noise generated between the two cables 1 and 2 can be suppressed.

As apparent from the above, according to the first embodiment, the fixing mechanism 12 that fixes the binding band 11 wound around the cable 1 in a state where the conductor blade 11b breaks through the insulating coating 1b of the cable 1, A fixing mechanism 15 for fixing the binding band 14 wound around the cable 2 is provided in a state where the conductor blade 14b penetrates the insulating coating 2b of the cable 2, and one end is electrically connected to the conductor 11a formed on the binding band 11 at one end. Since the capacitor 17 is connected between the electrically connected conductor plate 13 and the conductor plate 16 electrically connected to the conductor 14a formed at one end of the binding band 14. The electromagnetic noise propagating through the cables 1 and 2 can be suppressed by simply mounting the cables 1 and 2 at arbitrary positions.
That is, according to the first embodiment, since the noise filter can be attached to the cables 1 and 2 without cutting the cables 1 and 2, it can be applied to the cables 1 and 2 that have already been laid. The noise filter can be easily mounted at an arbitrary position.

  In the first embodiment, an example in which the noise filter is attached to the two cables 1 and 2 has been described, but the number of cables can be changed as appropriate. By providing cable bundling portions corresponding to the number of cables, providing conductor plates connecting the cable bundling portions and the capacitors 17 corresponding to the number of cables, and providing the capacitors 17 between the cables, Noise filters can be attached to two or more cables.

  In the first embodiment, the conductive projection members that break through the insulation coatings 1b and 2b of the cables 1 and 2 are the conductor blades 11b and 14b. However, the insulation projections 1b and 2b of the cables 1 and 2 are broken through. If possible, the conductor blade is not limited to the conductor blades 11b and 14b. For example, a conductor needle may be connected (or fixed) to the conductors 11a and 14a as a conductive protrusion member.

  4 and 5 show the shapes of the binding band 11 and the fixing mechanism 12, this shape is merely an example and can be changed as appropriate. Further, the cable bundling portion including the bundling band 11 and the fixing mechanism 12 (the cable bundling portion including the bundling band 14 and the fixing mechanism 15) can be attached to various types of cables.

Embodiment 2. FIG.
9 is a perspective view showing a noise filter capacitor mounting portion and fixing mechanism 12, 15 according to Embodiment 2 of the present invention, and FIG. 10 is a noise filter capacitor mounting portion and fixing mechanism according to Embodiment 2 of the present invention. FIG.
9 and 10, the same reference numerals as those in FIGS. 6 and 7 indicate the same or corresponding parts, and thus description thereof is omitted.
However, in FIG. 9, some of the components are simplified. For example, the conductor blade insertion notches 12c and 15c and the stopper claws 12d and 15d are not drawn. There are also notches 12c and 15c and stopper claws 12d and 15d.

The resin frame 21 is a square frame made of resin, and a recess 21 a is provided on the upper surface of the resin frame 21.
One end of the bent conductor 22 as the first conductor plate is electrically connected to the conductor 11a formed on the binding band 11, and the other end is bent halfway.
One end of the bent conductor 23 which is the second conductor plate is electrically connected to the conductor 14a formed on the binding band 14, and the other end is bent halfway.
As shown in FIG. 11, the capacitor 17 is provided with electrodes 31 and 32 at both ends, and the capacitor 17 is bent conductors 22 and 23 so that the electrodes 31 and 32 are electrically connected to the bent conductors 22 and 23. 23 is inserted.
At this time, the bent conductors 22 and 23 act as leaf springs and urge the capacitor 17 to sandwich the capacitor 17.
The size of the capacitor 17 is slightly smaller than the size of the recess 21a of the resin frame 21.

In the first embodiment, the capacitor 17 having one end connected to the other end of the conductor plate 13 and the other end connected to the other end of the conductor plate 16 is fixed by the resin mold 18. As shown in FIGS. 9 to 11, a capacitor 17 having electrodes 31 and 32 provided at both ends is inserted between bent conductors 22 and 23 whose ends are bent, and the capacitor 17 is bent conductors 22 and 23. It may be supported by the elastic force.
In this case, since the capacitor 17 can be removed as necessary, the same effect as in the first embodiment can be obtained, and a noise filter that can cope with a change in capacitance constant accompanying a change in noise suppression performance is configured. Thus, there is an effect that the use of the noise filter can be made flexible.

Embodiment 3 FIG.
In the second embodiment, the capacitor 17 is supported by the elastic force of the bent conductors 22 and 23. However, the capacitor mounting portion for mounting the capacitor 17 is detachable from the fixing mechanisms 12 and 15. It may have a fitting structure that fits together.

FIG. 12 is a perspective view showing noise filter fixing mechanisms 12, 15 according to Embodiment 3 of the present invention.
In FIG. 12, some of the components are simplified. For example, the conductor blade insertion notches 12c and 15c and the stopper claws 12d and 15d are not drawn. There are also 12c, 15c, stopper claws 12d, 15d and the like.
The conductor plate 13 which is the first conductor plate is electrically connected to the conductor 11a formed on the binding band 11 at one end, as in the first embodiment. In the third embodiment, It is formed around the fixing mechanism 12. Further, a recess 13a is formed at the other end of the conductor plate 13 as an electrode fitting structure.
The conductor plate 16 as the second conductor plate is electrically connected at one end to the conductor 14a formed on the binding band 14 as in the first embodiment, but in this third embodiment, It is formed around the fixing mechanism 15. A recess 16a is formed at the other end of the conductor plate 16 as an electrode fitting structure.

FIG. 13 is a perspective view showing a capacitor mounting portion of a noise filter according to Embodiment 3 of the present invention.
The capacitor 17 is fixed by the resin mold 18 in the same manner as in the first embodiment. However, electrodes 41 and 42 having convex portions 41a and 42a formed as electrode fitting structures are formed at both ends of the capacitor 17, respectively. Is formed.
The convex portion 41a of the electrode 41 has a structure in which the concave portion 13a of the conductor plate 13 is detachably fitted, and the convex portion 42a of the electrode 42 is detachably fitted to the concave portion 16a of the conductor plate 16. It has a structure.

In the third embodiment, the capacitor 17 can be detachably mounted by fitting the convex portions 41a, 42a of the electrodes 41, 42 with the concave portions 13a, 16a of the conductor plates 13, 16.
In the third embodiment, since the capacitor 17 can be detachably mounted, the same effect as in the first embodiment can be obtained, and it is possible to cope with a change in capacitance constant accompanying a change in noise suppression performance. A noise filter can be configured, and an effect of allowing flexibility in the use of the noise filter is achieved.

Embodiment 4 FIG.
FIG. 14 is a top view showing a part of a noise filter according to Embodiment 4 of the present invention. In FIG. 14, the same reference numerals as those in FIG.
The conductive connection member 51 has one end connected to the other end of the conductor plate 16 and the other end connected to the conductor mounter 52.
The conductor mounter 52 is provided with a hole 52a, and is connected to a ground surface or a reference metal surface by passing a screw or the like through the hole 52a.
Here, the conductor mounter 52 provided with the hole 52a is shown. However, the conductor mounter 52 may not be provided with the hole 52a. When the hole 52a is not provided, the conductive mounter 52 may be used. Etc. are used to connect to a ground plane or a reference metal plane.

  In the first to third embodiments, the noise filter having the effect of suppressing the noise propagation with respect to the normal mode is shown. However, by inserting the conductive connecting member 51 between the conductor plate 16 and the conductor mounter 52, one noise filter is provided. A noise filter having an effect of suppressing propagation of common mode noise generated between the cable and the ground may be configured.

Here, FIG. 15 is an explanatory diagram showing the flow of electromagnetic noise when the noise filter of FIG. 14 is attached to one cable 1.
By attaching the noise filter of FIG. 14 to the cable 1, the core wire 1a of the cable 1 electrically connected to the conductor 11a and the conductor blade 11b and the ground (or reference metal surface) connected to the conductor mounter 52 are provided. Are connected in an AC manner through the capacitor 17, so that the capacitor 17 can be connected between the cable 1 and the ground (or the reference metal surface).
By connecting the capacitor 17 between the cable 1 and the ground (or reference metal surface), the common mode noise generated between the cable 1 and the ground (or reference metal surface) is released to the ground (or reference metal surface). Therefore, propagation of common mode noise generated between one cable and the ground (or the reference metal surface) can be suppressed.

As is apparent from the above, according to the fourth embodiment, the conductive connection member 51 is provided in which one end is connected to the other end of the conductor plate 16 and the other end is connected to the conductor mounter 52. Therefore, it is possible to easily attach the cable 1 at an arbitrary position and suppress the propagation of the common mode noise generated between one cable and the ground (or the reference metal surface).
That is, according to the fourth embodiment, since the noise filter can be attached to the cable 1 without cutting the cable 1, the noise filter can be arbitrarily attached to the cable 1 that has already been laid. Can be easily installed in position.

Embodiment 5 FIG.
In the first to third embodiments, a noise filter having a noise propagation suppression effect for the normal mode is shown. In the fourth embodiment, a noise filter having a noise propagation suppression effect for the common mode is shown. A noise filter having a noise propagation suppressing effect on the common mode and a noise propagation suppressing effect on the common mode may be configured.

FIG. 16 is a top view showing a part of a noise filter according to Embodiment 5 of the present invention. In FIG. 16, the same reference numerals as those in FIGS.
In the noise filter of FIG. 16, a combination of two binding bands 11, 14 and fixing mechanisms 12, 15 that are staggered are arranged in the same direction.
An X capacitor 61, which is a first capacitive member, is a capacitor corresponding to the capacitor 17 in FIG. 1, one end of which is connected to the conductor plate 13 via the X capacitor connection terminal 61a, and the other end is connected to the X capacitor connection terminal 61b. It is connected to the conductor plate 16.

The Y capacitor 62 as the second capacitive member is a capacitor corresponding to the capacitor 17 of FIG. 14, and one end is connected to the other end of the conductor plate 13 via the Y capacitor connection terminal 62a.
The Y capacitor 63 which is a third capacitive member is a capacitor corresponding to the capacitor 17 of FIG. 14, and one end is connected to the other end of the conductor plate 16 via the Y capacitor connection terminal 63a.
One end of the conductor plate 64, which is the third conductor plate, is connected to the other end of the Y capacitor 62, and the other end is connected to the other end of the Y capacitor 63. The conductor plate 64 is electrically connected to the conductor mounter 52.

FIG. 17 is an explanatory diagram showing the flow of electromagnetic noise when the noise filter of FIG. 16 is attached to two cables 1 and 2.
By attaching the noise filter of FIG. 1 to the two cables 1 and 2, the core wire 1a of the cable 1 electrically connected to the conductor 11a and the conductor blade 11b, and the conductor 14a and the conductor blade 14b are electrically connected. Since the core wire 2 a of the connected cable 2 is connected in an AC manner through the X capacitor 61, the X capacitor 61 can be connected between the two cables 1 and 2.
Further, the core wire 1 a of the cable 1 electrically connected to the conductor 11 a and the conductor blade 11 b and the ground (or reference metal surface) connected to the conductor mounter 52 are connected in an alternating manner through the Y capacitor 62. In addition, the core wire 2 a of the cable 2 electrically connected to the conductor 14 a and the conductor blade 14 b and the ground (or reference metal surface) connected to the conductor mounter 52 are connected to each other through the Y capacitor 63. .
Thereby, the Y capacitor 62 can be connected between the cable 1 and the ground (or the reference metal surface), and the Y capacitor 63 can be connected between the cable 2 and the ground (or the reference metal surface).

For this reason, since noise with respect to the normal mode can be circulated between the two cables 1 and 2, propagation of normal mode noise generated between the two cables 1 and 2 can be suppressed.
Further, since common mode noise generated between the cable 1 or the cable 2 and the ground (or the reference metal surface) can be released to the ground (or the reference metal surface), the cable 1 or the cable 2 and the ground (or the reference metal surface). ) Propagation of common mode noise can be suppressed.

  Therefore, according to the fifth embodiment, it is possible to obtain a noise filter having an effect of suppressing noise propagation with respect to the normal mode and an effect of suppressing noise propagation with respect to the common mode. Also in the fifth embodiment, since the noise filter can be attached to the cables 1 and 2 without cutting the cables 1 and 2, the noise is applied to the cables 1 and 2 that have already been laid. The filter can be easily mounted at an arbitrary position.

  In the present invention, within the scope of the invention, any combination of the embodiments, or any modification of any component in each embodiment, or omission of any component in each embodiment is possible. .

  1 cable (first cable), 1a core wire, 1b insulation coating, 2 cable (second cable), 2a core wire, 2b insulation coating, 11 binding band (first band), 11a conductor, 11b conductor blade (conductive) Protrusion member), 11c detent, 12 fixing mechanism (first fixing mechanism), 12a resin box, 12b insertion hole, 12c conductor blade insertion notch, 12d stopper claw, 13 conductor plate (first conductor) Plate), 13a recess, 14 binding band (second band), 14a conductor, 14b conductor blade (conductive protrusion member), 14c detent, 15 fixing mechanism (second fixing mechanism), 15a resin box, 15b Insertion hole, 15c Notch for insertion of conductor blade, 15d Stopper claw, 16 Conductor plate (second conductor plate), 16a Recess, 17 Capacitor ( Capacitive member), 18 resin mold, 21 resin frame, 21a depression, 22 bent conductor (first conductor plate), 23 bent conductor (second conductor plate), 31, 32 electrode, 41, 42 electrode, 41a, 42a convex portion, 51 conductive connection member, 52 conductor mounter, 52a hole, 61 X capacitor (first capacitive member), 61a, 61b X capacitor connection terminal, 62 Y capacitor (second capacitive member), 62a Y capacitor connection terminal, 63 Y capacitor (third capacitive member), 63a Y capacitor connection terminal, 64 conductor plate (third conductor plate).

Claims (7)

A first band in which a conductor provided with a conductive projection member that breaks through the insulation coating of the first cable is formed on one side;
A first fixing mechanism for fixing the first band wound around the first cable in a state where the conductive protruding member has broken through the insulating coating of the first cable;
A first conductor plate having one end electrically connected to a conductor formed in the first band;
A second band in which a conductor provided with a conductive projection member that breaks through the insulation coating of the second cable is formed on one side;
A second fixing mechanism for fixing the second band wound around the second cable in a state where the conductive protruding member has broken through the insulation coating of the second cable;
A second conductor plate having one end electrically connected to the conductor formed on the second band;
And a capacitive member having one end connected to the other end of the first conductor plate and the other end connected to the other end of the second conductor plate.   The noise filter according to claim 1, wherein a capacitor is used as the capacitive member.   The noise filter according to claim 1, wherein the first and second conductive plates and the capacitive member are fixed by a resin mold. The first and second conductor plates are composed of bent conductors that act as leaf springs,
The noise filter according to claim 1, wherein the capacitive member is supported by an elastic force of the first and second conductor plates acting as a leaf spring.   The noise filter according to claim 1, wherein the first and second conductor plates and the electrode of the capacitive member have a fitting structure in which the electrodes are detachably fitted. A band in which a conductor provided with a conductive projection member that breaks through the insulation coating of the cable is formed on one side;
A fixing mechanism for fixing the band wound around the cable in a state where the conductive protrusion member has broken through the insulation coating of the cable;
A first conductor plate having one end electrically connected to the conductor formed in the band;
A capacitive member having one end connected to the other end of the first conductor plate;
A second conductor plate having one end connected to the other end of the capacitive member;
A noise filter comprising: a conductive connection member having one end connected to the other end of the second conductor plate and the other end connected to a ground surface or a metal surface serving as a reference. A first band in which a conductor provided with a conductive projection member that breaks through the insulation coating of the first cable is formed on one side;
A first fixing mechanism for fixing the first band wound around the first cable in a state where the conductive protruding member has broken through the insulating coating of the first cable;
A first conductor plate having one end electrically connected to a conductor formed in the first band;
A second band in which a conductor provided with a conductive projection member that breaks through the insulation coating of the second cable is formed on one side;
A second fixing mechanism for fixing the second band wound around the second cable in a state where the conductive protruding member has broken through the insulation coating of the second cable;
A second conductor plate having one end electrically connected to the conductor formed on the second band;
A first capacitive member having one end connected to the other end of the first conductor plate and the other end connected to the other end of the second conductor plate;
A second capacitive member having one end connected to the other end of the first conductor plate;
A third capacitive member having one end connected to the other end of the second conductor plate;
A third conductor plate having one end connected to the other end of the second capacitive member and the other end connected to the other end of the third capacitive member;
A noise filter comprising: a conductive connecting member having one end connected to the third conductor plate and the other end connected to a ground surface or a reference metal surface.

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