JP7188948B2 - Noise filter and wire harness - Google Patents

Description

The present invention relates to noise filters and wire harnesses.

2. Description of the Related Art Conventionally, there has been known a technique of interposing a noise filter in an electric wire to be noise-reduced in order to reduce electrical noise carried on the electric wire. The noise filter has a filter circuit provided with a noise reduction element such as a capacitor, and the filter circuit is interposed between the noise reduction target wire and the ground terminal. This type of noise filter is disclosed, for example, in Patent Documents 1 and 2 below.

JP 2006-100061 A Japanese Unexamined Patent Application Publication No. 2012-039201

By the way, in the conventional noise filter, another intermediate electric wire connects between the electric wire to be noise-reduced and the filter circuit. For example, in the noise filter of Patent Document 1, a filter circuit is electrically connected to two branch wires branched from a noise reduction target wire of a main line, and noise components on the noise reduction target wire are detected. is reduced. Therefore, with conventional noise filters, it is necessary to adjust the filter circuit characteristics (resonance point, noise reduction performance, etc.), taking into account the noise components that are carried on intermediate wires such as branch wires. .

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a noise filter and a wire harness which are not affected by intermediate electric wires.

In order to achieve the above object, a noise filter according to the present invention includes a filter circuit interposed between a first wire and a second wire running side by side, and housing the filter circuit and the first wire and the second wire. and a holding structure for holding an electrical connection state between the filter circuit and the first electric wire and the second electric wire, wherein the filter circuit is connected to the first electric wire and the second electric wire. a noise reduction element disposed between the first electric wire and the second electric wire along the arrangement direction; a conductive first circuit connection member assembled to an intermediate connection portion of the core wire of the first electric wire; and a conductive second circuit connection member assembled to the intermediate connection portion of the core wire of the second electric wire, wherein the first circuit connection member is physically connected to the intermediate connection portion of the core wire of the first electric wire. and a first circuit for electrically connecting the first electric wire and the second electric wire by contacting the first connecting portion of the noise reduction element along the axial direction of the first electric wire and the second electric wire. a side contact, wherein the second circuit connection member includes a wire side connection portion physically and electrically connected to the intermediate connection portion of the core wire of the second wire; and the noise reduction element. and a second circuit side contact that is brought into contact with and electrically connected to the second connection portion of the first circuit side contact along the axial direction, and the holding structure uses a pressing force along the axial direction to press the first circuit side contact and at least one of the second circuit side contacts is pressed against the noise reduction element, and the noise reduction element is held between the first circuit side contacts and the second circuit side contacts in the axial direction. and electrical connection between the first circuit-side contact and the first connection portion of the noise reduction element and between the second circuit-side contact and the second connection portion of the noise reduction element. The holding structure is provided in the housing, and the holding structure is the axial pressing force acting on one of the first circuit side contact and the second circuit side contact a pressing body for pressing said one of said first circuit side contact and said second circuit side contact against said noise reduction element; and said pressing body acting said pressing force via said noise reduction element. and a locking body that locks the other of the first circuit side contact and the second circuit side contact in the axial direction and receives the pressing force .

Further, in order to achieve the above object, a noise filter according to the present invention includes a filter circuit interposed between a first electric wire and a second electric wire running in parallel; and a holding structure for holding an electrical connection state between the filter circuit and the first wire and the second wire, wherein the filter circuit includes the first wire and the second wire a noise reduction element arranged between electric wires along the arrangement direction of the first electric wire and the second electric wire; and a conductive first circuit connecting member assembled to an intermediate connecting portion of the core wire of the first electric wire. and a conductive second circuit connection member assembled to an intermediate connection portion of the core wire of the second electric wire, wherein the first circuit connection member is attached to the intermediate connection portion of the core wire of the first electric wire. and a wire-side connection portion physically and electrically connected to the noise reduction element along the axial direction of the first wire and the second wire to be electrically connected to the first connection portion of the noise reduction element. 1 circuit side contact, and the second circuit connection member includes a wire side connection portion physically and electrically connected to the intermediate connection portion of the core wire of the second wire, and the noise a second circuit side contact that is brought into contact with and electrically connected to a second connection portion of the reduction element along the axial direction, and the holding structure is configured to press the first circuit through a pressing force along the axial direction. At least one of the side contact and the second circuit side contact is pressed against the noise reduction element, and the noise reduction element is sandwiched between the first circuit side contact and the second circuit side contact in the axial direction. and between the first circuit side contact and the first connection portion of the noise reduction element and between the second circuit side contact and the second connection portion of the noise reduction element. The filter circuit has a pressing structure that maintains a connected state, wherein the filter circuit includes two noise reduction elements in which the first connection portions are arranged to face each other with an interval in the axial direction, and the first circuit side contact is provided. is disposed between the first connection portions of the two noise reduction elements, and the second circuit connection member includes two second circuit side contacts sandwiching the two noise reduction elements in the axial direction. , wherein each of the two second circuit-side contacts contacts and electrically connects a non-elastically deformable base portion and the second connection portion of the noise reduction element arranged opposite to each other in the axial direction. each of the contact portions is an elastic contact capable of being elastically deformed in the axial direction with respect to the base. It is formed as a point portion, and is elastically deformed in a direction opposite to the noise reduction element arranged opposite to the noise reduction element in the axial direction, and the reaction force associated with the elastic deformation is used as a pressing force in the axial direction. It is characterized in that it is formed and arranged so as to act on the second connecting portion of the noise reduction element in an arranged state, and is used as the holding structure.

Further, in order to achieve the above object, a wire harness according to the present invention includes a trunk line including first electric wires and second electric wires, and a noise filter for reducing noise components, wherein the noise filter runs parallel to the a filter circuit to be interposed between a first wire and the second wire; a housing that accommodates the filter circuit and the first wire and the second wire; the filter circuit, the first wire and the second wire; a holding structure for holding an electrical connection state between the first wire and the second wire, wherein the filter circuit is arranged between the first wire and the second wire along the arrangement direction of the first wire and the second wire. a noise reduction element disposed; a conductive first circuit connection member assembled to the intermediate connection portion of the core wire of the first electric wire; and a conductive first circuit connection member assembled to the intermediate connection portion of the core wire of the second electric wire. a two-circuit connection member, wherein the first circuit connection member includes a wire-side connection portion physically and electrically connected to the intermediate connection portion of the core wire of the first wire; and the noise reduction circuit. a first circuit-side contact that is brought into contact with the first connecting portion of the element along the axial direction of the first electric wire and the second electric wire for electrical connection, and the second circuit connecting member includes the A wire-side connecting portion physically and electrically connected to the intermediate connecting portion of the core wire of the second electric wire is brought into contact with the second connecting portion of the noise reduction element along the axial direction. and a second circuit-side contact for electrical connection, wherein the holding structure holds at least one of the first circuit-side contact and the second circuit-side contact by pressing force along the axial direction to the noise reduction element. to hold the state of sandwiching the noise reduction element by the first circuit side contact and the second circuit side contact in the axial direction, and the first circuit side contact and the noise reduction element between the first circuit side contact and the noise reduction element. 1 connection portion and between the second circuit side contact and the second connection portion of the noise reduction element, wherein the holding structure is provided in the housing. , the holding structure holds one of the first circuit-side contact and the second circuit-side contact by the axial pressing force acting on one of the first circuit-side contact and the second circuit-side contact. a pressing body for pressing one of the contacts against the noise reduction element; and an engaging body that engages in the axial direction and receives the pressing force.

Further, in order to achieve the above object, a wire harness according to the present invention includes a trunk line including first electric wires and second electric wires, and a noise filter for reducing noise components, wherein the noise filter runs parallel to the a filter circuit to be interposed between a first wire and the second wire; a housing that accommodates the filter circuit and the first wire and the second wire; the filter circuit, the first wire and the second wire; a holding structure for holding an electrical connection state between the first wire and the second wire, wherein the filter circuit is arranged between the first wire and the second wire along the arrangement direction of the first wire and the second wire. a noise reduction element disposed; a conductive first circuit connection member assembled to the intermediate connection portion of the core wire of the first electric wire; and a conductive first circuit connection member assembled to the intermediate connection portion of the core wire of the second electric wire. a two-circuit connection member, wherein the first circuit connection member includes a wire-side connection portion physically and electrically connected to the intermediate connection portion of the core wire of the first wire; and the noise reduction circuit. a first circuit-side contact that is brought into contact with the first connecting portion of the element along the axial direction of the first electric wire and the second electric wire for electrical connection, and the second circuit connecting member includes the A wire-side connecting portion physically and electrically connected to the intermediate connecting portion of the core wire of the second electric wire is brought into contact with the second connecting portion of the noise reduction element along the axial direction. and a second circuit-side contact for electrical connection, wherein the holding structure holds at least one of the first circuit-side contact and the second circuit-side contact by pressing force along the axial direction to the noise reduction element. to hold the state of sandwiching the noise reduction element by the first circuit side contact and the second circuit side contact in the axial direction, and the first circuit side contact and the noise reduction element between the first circuit side contact and the noise reduction element. 1 connection portion and between the second circuit side contact and the second connection portion of the noise reduction element, wherein the filter circuit is arranged in the axial direction Two noise reduction elements are provided with the first connection portions facing each other with a space therebetween, and the first circuit side contact is between the first connection portions of the two noise reduction elements. The second circuit connecting member has two second circuit side contacts sandwiching the two noise reduction elements in the axial direction, and the two second circuit side contacts are not elastically deformable. The base portion is brought into contact with the second connection portion of the noise reduction element arranged to face in the axial direction, and an electric current is supplied. and a contact portion for air connection, wherein each of the contact portions is formed as an elastic contact portion capable of elastic deformation in the axial direction with respect to the base portion, and is arranged to face in the axial direction. The noise reduction element is elastically deformed in the direction opposite to the noise reduction element that is positioned thereon, and the reaction force associated with the elastic deformation acts on the second connection portion of the noise reduction element that is arranged opposite to the noise reduction element as a pressing force in the axial direction. and is used as the holding structure .

In the noise filter according to the present invention, by electrically interposing the filter circuit between the intermediate connection portion of the first wire and the intermediate connection portion of the second wire, the filter circuit is connected to each intermediate connection portion. are electrically connected. For example, the first electric wire and the second electric wire are bundled with the main wire of the wire harness. Therefore, this noise filter does not require the conventional adjustment of the filter circuit characteristics in consideration of the influence of branch wires (intermediate wires) from the main line. That is, the noise filter according to the present invention is not affected by the intermediate electric wire. Further, in the noise filter according to the present invention, the wire-side connection portion of the first circuit connection member and the wire-side connection portion of the second circuit connection member are previously assembled to the first electric wire and the second electric wire running in parallel. there is In this noise filter, the noise reduction element is arranged between the respective wire side connection portions, and the first circuit side contact of the first circuit connection member and the first element connection body of the noise reduction element are arranged. and between the second circuit-side contact of the second circuit connecting member and the second element connecting body of the noise reduction element are electrically connected in the axial direction. Therefore, the noise filter can be made compact in the direction orthogonal to the arrangement direction of the first electric wires and the second electric wires and the axial direction of the first electric wires and the second electric wires. In addition, the noise filter electrically connects between the first circuit side contact and the first element connection body of the noise reduction element and between the second circuit side contact and the second element connection body of the noise reduction element in the axial direction. , it is possible to reduce the physical size in the arrangement direction. Moreover, the wire harness according to the present invention is provided with such a noise filter, and can produce the effect of obtaining this noise filter.

FIG. 1 is a perspective view showing a noise filter and wire harness of the embodiment. FIG. 2 is a plan view showing the noise filter and wire harness of the embodiment. FIG. 3 is an exploded perspective view showing the noise filter and wire harness of the embodiment. FIG. 4 is an exploded perspective view of the noise filter and wire harness of the embodiment viewed from another angle. FIG. 5 is a perspective view explaining the first circuit connection member and the second circuit connection member of the embodiment. FIG. 6 is a perspective view showing the second housing member of the embodiment. 7 is a cross-sectional view taken along the line XX of FIG. 2. FIG. FIG. 8 is a perspective view showing a noise filter and wire harness of a modification. FIG. 9 is a plan view showing a noise filter and wire harness of a modification. FIG. 10 is an exploded perspective view showing a noise filter and wire harness of a modification. FIG. 11 is an exploded perspective view of the noise filter and wire harness of the modification as seen from another angle. 12 is a cross-sectional view taken along line YY of FIG. 9. FIG. FIG. 13 is a perspective view showing a modified first circuit connecting member. FIG. 14 is a plan view showing a first circuit connecting member of a modified example. FIG. 15 is a perspective view showing a second circuit connecting member of a modification. FIG. 16 is a perspective view showing a first housing member of a modified example.

EMBODIMENT OF THE INVENTION Below, embodiment of the noise filter which concerns on this invention, and a wire harness is described in detail based on drawing. In addition, this invention is not limited by this embodiment.

[Embodiment]
One embodiment of a noise filter and wire harness according to the present invention will be described with reference to FIGS. 1 to 7. FIG.

Reference numeral 1 in FIGS. 1 to 4 indicates the noise filter of this embodiment. This noise filter 1 is a noise reduction device in which intermediate portions of two wires (a first wire WE1 and a second wire WE2) are connected by a filter circuit. A filter circuit reduces the electrical noise component on the other. The two electric wires are, for example, two of a plurality of electric wires included in the main line WT of the wiring harness WH of the vehicle, one electric wire being grounded as a ground wire and the other electric wire being used as a power supply wire. be done. A load such as a defogger or a high mount stop lamp is electrically connected to the power line. The noise filter 1 becomes one of the components of the wire harness WH by connecting to the two electric wires. In the wire harness WH illustrated below, the first electric wire WE1 is used as a ground wire, and the second electric wire WE2 is used as a power wire. One end of the first electric wire WE1 is grounded. The second electric wire WE2 has one end electrically connected to a power source (for example, a secondary battery of a vehicle) and the other end electrically connected to a load. Each of the first electric wire WE1 and the second electric wire WE2 includes a conductive core wire WEa and an insulating coating WEb that covers the outer peripheral surface of the core wire WEa.

The noise filter 1 is a noise reduction device that includes a filter circuit 10 that reduces noise components (FIGS. 1 to 4). For example, the filter circuit 10 reduces electrical noise components on the second electric wire WE2. Furthermore, this noise filter 1 has a housing 20 that houses the filter circuit 10 (FIGS. 1 to 4). In this noise filter 1, the first electric wire WE1 and the second electric wire WE2 are accommodated in parallel arrangement in the accommodation chamber 20a (FIG. 1) of the housing 20, and the first electric wire WE1 and the first electric wire WE1 are arranged in the accommodation chamber 20a. and the second electric wire WE2 run side by side. The filter circuit 10 is interposed between the first electric wire WE1 and the second electric wire WE2 which run side by side. Here, an intermediate connection portion WEa1 of a first wire WE1 and an intermediate connection portion WEa2 of a second wire WE2 described below are housed in a storage chamber 20a, and a filter circuit 10 is interposed between the intermediate connection portions WEa1 and WEa2. Let Both ends of the first electric wire WE<b>1 and the second electric wire WE<b>2 are drawn out of the housing 20 .

The filter circuit 10 is electrically interposed between a portion of the core wire WEa located in the intermediate portion of the first electric wire WE1 and a portion of the core wire WEa located in the intermediate portion of the second electric wire WE2. Hereinafter, a portion of the core wire WEa located in the intermediate portion of the first electric wire WE1 will be referred to as "intermediate connection portion WEa1", and a portion of the core wire WEa located in the intermediate portion of the second electric wire WE2 will be referred to as "intermediate connection portion WEa1". It is called an "intermediate connection portion WEa2". Further, hereinafter, the intermediate connection portion WEa1 of the core wire WEa of the first electric wire WE1 is simplified as “the intermediate connection portion WEa1 of the first electric wire WE1”, and the intermediate connection portion of the core wire WEa of the second electric wire WE2 The portion WEa2 is simply referred to as "the intermediate connection portion WEa2 of the second electric wire WE2". That is, the filter circuit 10 is electrically interposed between the intermediate connection portion WEa1 of the first electric wire WE1 and the intermediate connection portion WEa2 of the second electric wire WE2. are electrically connected (FIGS. 1 and 2).

The filter circuit 10 includes at least one noise reduction element 11 that reduces noise components, a first connection portion (hereinafter referred to as a "first element connection body") of the noise reduction element 11, and an intermediate connection of the first wire WE1. A conductive first connection member (hereinafter referred to as a “first circuit connection member”) 12 electrically connected to the portion WEa1 and a second connection portion of the noise reduction element 11 (hereinafter referred to as a “second element connection body”). ) and a conductive second connection member (hereinafter referred to as a “second circuit connection member”) 13 electrically connected to the intermediate connection portion WEa2 of the second electric wire WE2 (FIGS. 1 to 4). . In this filter circuit 10, the noise reduction element 11 is arranged between the first electric wire WE1 and the second electric wire WE2 along the arrangement direction (parallel arrangement direction) of the first electric wire WE1 and the second electric wire WE2.

In the following, when simply described as "axial direction", it indicates the axial direction of the first electric wire WE1 and the second electric wire WE2. Further, when simply described as "arrangement direction" below, it indicates the arrangement direction of the first electric wires WE1 and the second electric wires WE2.

Any noise reduction element 11 may be used as long as it can reduce noise in the circuit configuration of the noise filter 1 . For example, the noise reduction element 11 can be a capacitor, a coil, or the like. The filter circuit 10 is provided with two capacitors as the noise reduction element 11, and is configured so that noise can be reduced by these two capacitors (FIGS. 1 to 4). The two capacitors as the noise reduction element 11 are formed in a substantially parallelepiped shape and stacked in the arrangement direction when housed in the housing 20 . Further, in the capacitor as the noise reduction element 11, when housed in the housing 20, the first external electrode as the first element connector is arranged at one end in the axial direction, and the first external electrode is arranged at the other end in the axial direction. A second external electrode is arranged as a second element connector. That is, in the noise reduction element 11, the first element connection body and the second element connection body are arranged facing each other in the axial direction. In the noise reduction element 11 of this example, for example, the opposing arrangement direction of the first element connection body and the second element connection body is defined as the width direction, and a certain orthogonal direction to the opposing arrangement direction is defined as the depth direction. and the direction perpendicular to the depth direction is defined as the thickness direction, and among the three directions, the thickness direction is the thinnest. The two noise reduction elements 11 in this example are stacked with their thickness direction facing the arrangement direction (FIGS. 1 to 4).

The first circuit connection member 12 and the second circuit connection member 13 are conductive members that electrically connect each other through the noise reduction element 11, and are made of metal or the like to sandwich the two noise reduction elements 11 in the axial direction. of conductive material. Each of the illustrated first circuit connecting member 12 and second circuit connecting member 13 is a press-molded product using a metal plate as a base material.

The first circuit connection member 12 is preliminarily attached to the intermediate connection portion WEa1 of the first electric wire WE1, and is accommodated in the accommodation chamber 20a of the housing 20 together with the first electric wire WE1. The first circuit connection member 12 is connected to the wire side connection portion 12a physically and electrically connected to the intermediate connection portion WEa1 of the first wire WE1, and to the first element connection body of the noise reduction element 11. and a first contact (hereinafter referred to as a “first circuit side contact”) 12b that is brought into contact and electrically connected along the axial direction (FIGS. 1 to 4).

The illustrated wire-side connection portion 12a is formed by winding two rectangular pieces facing each other with a gap around the intermediate connection portion WEa1 of the first wire WE1 and crimping them (FIG. 5). By assembling the wire-side connection portion 12a to the intermediate connection portion WEa1 of the first wire WE1 in this manner, the wire-side connection portion 12a is directly electrically connected to the intermediate connection portion WEa1.

When accommodated in the housing 20, the first circuit side contact 12b is arranged to face the first element connection body of the noise reduction element 11 in the axial direction and is in contact with the first element connection body in the axial direction. Let Therefore, the first circuit side contact 12b is formed so as to protrude in the direction orthogonal to the axial direction from the wire side connection portion 12a assembled to the intermediate connection portion WEa1 of the first wire WE1.

The first circuit side contact 12b has a rectangular plate-like base portion 12b1 and a contact portion _12b2 electrically connected to the _first element connector of the noise reduction element 11 (FIG. 5). The base 12b1 has _a plane orthogonal to the axial direction, and when accommodated in the housing 20, one orthogonal plane is axially spaced from the first element connector of the noise reduction element 11. Place them facing each other. The contact portion _12b2 is formed in a bulging shape bulging from _one orthogonal plane of the base portion 12b1 in order to obtain a stable contact load with the first element connection body. The contact portion _12b2 is provided for each noise reduction element 11, and when accommodated in the housing 20, is arranged to face the first element connection body of the noise reduction element 11 in the axial direction, and the first element Axial contact with the connector.

The second circuit connection member 13 is preliminarily attached to the intermediate connection portion WEa2 of the second electric wire WE2, and is accommodated in the accommodation chamber 20a of the housing 20 together with the second electric wire WE2. The second circuit connection member 13 is connected to the wire side connection portion 13a physically and electrically connected to the intermediate connection portion WEa2 of the second wire WE2, and to the second element connection body of the noise reduction element 11. and a second contact (hereinafter referred to as a “second circuit side contact”) 13b that is brought into contact and electrically connected along the axial direction (FIGS. 1 to 4).

The wire-side connection portion 13a of this example is the same part as the wire-side connection portion 12a, and is applied by winding two rectangular pieces opposed to each other with a space therebetween around the intermediate connection portion WEa2 of the second wire WE2. It is tightened and crimped. By assembling the wire-side connection portion 13a to the intermediate connection portion WEa2 of the second wire WE2 in this manner, the wire-side connection portion 13a is directly electrically connected to the intermediate connection portion WEa2.

When accommodated in the housing 20, the second circuit side contact 13b is arranged to face the second element connection body of the noise reduction element 11 in the axial direction and is in contact with the second element connection body in the axial direction. Let Therefore, the second circuit side contact 13b is formed so as to protrude in the direction orthogonal to the axial direction from the wire side connection portion 13a assembled to the intermediate connection portion WEa2 of the second wire WE2.

The second circuit side contact 13b has _a rectangular plate-like base portion 13b1 and a contact portion 13b2 electrically connected to the _second element connector of the noise reduction element 11 (FIG. 5). The base portion _13b1 has a plane perpendicular to the axial direction, and when housed in the housing 20, one of the perpendicular planes is spaced apart from the second element connection body of the noise reduction element 11 in the axial direction. Place them facing each other. The contact portion 13b2 is formed in a bulging shape bulging from _one orthogonal plane of the base portion 13b1 in order to obtain a stable contact load with the _second element connection body. The contact portion _13b2 is provided for each noise reduction element 11, and when accommodated in the housing 20, is arranged to face the second element connection body of the noise reduction element 11 in the axial direction, and Axial contact with the connector.

In this filter circuit 10, the noise reduction element 11 is sandwiched between the first circuit side contact 12b and the _second circuit side contact 13b in the axial direction. The contact portion 13b2 of the second circuit side contact 13b and the _second element connection body of the noise reduction element 11 are brought into contact with each other in the axial direction. As a result, the filter circuit 10 electrically connects the first element connection body of the noise reduction element 11 to the intermediate connection portion WEa1 of the first electric wire WE1 via the first circuit side contact 12b, and the second circuit side contact The second element connection body of the noise reduction element 11 is electrically connected to the intermediate connection portion WEa2 of the second electric wire WE2 via 13b.

The housing 20 is molded from an insulating material such as synthetic resin. The housing 20 has an accommodation chamber 20a inside for accommodating the filter circuit 10, the first wire WE1, and the second wire WE2 (FIG. 1). The accommodation chamber 20a accommodates at least the filter circuit 10, the intermediate connection portion WEa1 of the first wire WE1, and the intermediate connection portion WEa2 of the second wire WE2. In the housing 20, each end portion of the first electric wire WE1 is pulled out from the inner storage chamber 20a, and each end portion of the second electric wire WE2 is drawn from the inner storage chamber 20a. pulled outwards. The housing 20 forms a storage chamber 20a by fitting a first housing member 21 and a second housing member 22 together.

In this housing 20, the filter circuit 10, the first electric wire WE1 and the second electric wire WE2 are installed in the first housing member 21, and the second housing member 22 is fitted to the first housing member 21. match. The first housing member 21 and the second housing member 22 are fitted along a direction orthogonal to the axial direction and the arrangement direction. The orthogonal direction is hereinafter referred to as the "fitting direction".

The first housing member 21 has a main wall 21a and a plurality of peripheral walls 21b-21e erected from the periphery of the main wall 21a (FIG. 3). The exemplified first housing member 21 includes a rectangular flat main wall 21a and first to fourth flat plate-like main walls 21a vertically arranged in the same direction from four sides of the main wall 21a. and peripheral wall members 21b to 21e. In the first housing member 21, a first peripheral wall 21b and a second peripheral wall 21c are arranged to face each other, and a third peripheral wall 21d and a fourth peripheral wall 21e are arranged to face each other. In the first housing member 21, a space surrounded by the main wall 21a and the first to fourth peripheral wall members 21b to 21e serves as an accommodation chamber 20a. The WE1 and the second electric wire WE2 are accommodated through the opening 21f. The opening 21f is an opening of the housing chamber 20a formed in a rectangular shape at the edges of the first to fourth peripheral walls 21b to 21e.

The second housing member 22 is prepared to close the opening 21f of the housing chamber 20a. The second housing member 22 has a blocking wall body 22a that blocks the opening 21f when assembled with the first housing member 21 (FIGS. 3 and 4). The second housing member 22 also has a plurality of peripheral walls 22b to 22e erected from the periphery of the closing wall 22a (FIG. 4). The illustrated second housing member 22 includes a rectangular plate-like blocking wall 22a and first to fourth flat plate-like members vertically extending from four sides of the blocking wall 22a in the same direction. and peripheral walls 22b-22e. In the second housing member 22, the first peripheral wall body 22b and the second peripheral wall body 22c are arranged to face each other, and the third peripheral wall body 22d and the fourth peripheral wall body 22e are arranged to face each other.

In the illustrated case 20, when the assembly of the first case member 21 and the second case member 22 is completed, the first peripheral wall members 21b and 22b are arranged to face each other, and , the second peripheral wall bodies 21c and 22c are arranged to face each other, the third peripheral wall bodies 21d and 22d are arranged to face each other, and the fourth peripheral wall bodies 21e and 22e are arranged to face each other.

In the housing 20, the first electric wire WE1 and the second electric wire WE2 are drawn out from the first peripheral wall members 21b, 22 arranged to face each other and the second peripheral wall members 21c, 22c arranged to face each other. Therefore, each of the first peripheral wall bodies 21b and 22b is provided with first outlets 21b ₁ and 22b ₁ for drawing out one end side of the first electric wire WE1 and one end of the second electric wire WE2. Second drawer ports 21b ₂ and 22b ₂ are formed to draw out the ends (FIGS. 3 and 4). In each of the first peripheral wall bodies 21b and 22b, the first outlets 21b ₁ and 22b ₁ are arranged to face each other, and the second outlets 21b ₂ and 22b ₂ are arranged to face each other. Further, the second peripheral wall bodies 21c and 22c are provided with third lead-out openings 21c ₁ and 22c ₁ for drawing out the other end side of the first electric wire WE1 and the other end of the second electric wire WE2. Fourth drawer openings 21c ₂ and 22c ₂ are formed to draw out the end portions outward (FIGS. 3 and 4). In each of the second peripheral wall bodies 21c and 22c, the third outlets 21c ₁ and 22c ₁ are arranged to face each other, and the fourth outlets 21c ₂ and 22c ₂ are arranged to face each other.

In this housing 20, two noise reduction elements 11, an intermediate connection portion WEa1 of a first wire WE1 to which a first circuit connection member 12 is attached, and a second wire WE2 to which a second circuit connection member 13 is attached and the intermediate connection portion WEa2 of are housed in the housing chamber 20a through the opening 21f. When housing the first electric wire WE1 and the second electric wire WE2, in the first housing member 21, the _{first electric wire WE1 is inserted into the first outlet} 21b1 and the third outlet 21c1, and the second electric wire WE2 is inserted into the _second outlet 21b2 and the fourth outlet _21c2 . In the housing 20, the opening 21f is closed, the _{first wire WE1 is inserted into the first outlet} 22b1 and the third outlet 22c1, and the second wire WE2 is inserted into the _second outlet 22b2 and the third outlet 22b2. 4 The second housing member 22 is assembled to the first housing member 21 so as to be inserted into the outlet _22c2 . For example, the noise filter 1 is fixed to the trunk line WT together with the first electric wire WE1 and the second electric wire WE2 with an adhesive tape (not shown) or the like, and is held by the trunk line WT. This completes the attachment of the noise filter 1 to the first electric wire WE1 and the second electric wire WE2.

Here, the noise filter 1 is provided with a holding structure 30 for holding an electrical connection state between the filter circuit 10 and the first electric wire WE1 and the second electric wire WE2 (FIGS. 1 to 4). The holding structure 30 holds at least one of the first circuit-side contact 12b of the first circuit connection member 12 and the second circuit-side contact 13b of the second circuit connection member 13 by a pressing force along the axial direction. It is a pressing structure that presses against. The holding structure 30 holds the noise reduction element 11 sandwiched by the first circuit side contact 12b and the second circuit side contact 13b in the axial direction as it is pressed by the pressing force. Formed to maintain electrical connection between the side contact 12b and the first element connection body of the noise reduction element 11 and between the second circuit side contact 13b and the second element connection body of the noise reduction element 11. do.

Specifically, in the noise filter 1 of this embodiment, the holding structure 30 is provided on the housing 20 . In the holding structure 30 of the present embodiment, the first circuit-side contact 12b and the second circuit-side contact 13b are held together by an axial pressing force acting on one of the first circuit-side contact 12b and the second circuit-side contact 13b. A pressing body 31 that presses one of them against the noise reduction element 11, and the other of the first circuit side contact 12b and the second circuit side contact 13b on which the pressing force of the pressing body 31 acts via the noise reduction element 11 and a locking body 32 that locks in the axial direction and receives a pressing force (FIGS. 1 and 2). In the holding structure 30 of this embodiment, one of the pressing body 31 and the locking body 32 is provided on the first housing member 21 and the other is provided on the second housing member 22 .

In this example, the pressing body 31 is provided on the second housing member 22 (FIGS. 1, 2, 4, 6 and 7), and the locking body 32 is provided on the first housing member 21 (FIG. 1 to 3 and 7). Further, in this example, a pressing body 31 is provided to press the second circuit side contact 13b against the noise reduction element 11, and the first circuit side contact 12b to which the pressing force from the pressing body 31 is transmitted is locked. A locking body 32 is provided as an object.

The pressing member 31 illustrated in this example includes a non-elastically deformable base portion 31a erected from the inner wall surface of the closing wall member 22a of the second housing member 22, and an elastically deformable pressing portion 31b connected to the base portion 31a. , (FIGS. 2, 6 and 7).

The illustrated base portion 31a is formed as a cantilever-shaped rectangular piece having a fixed end on the inner wall surface side of the closing wall body 22a. The base portion 31a is spaced from the other orthogonal plane of the base portion 13b1 of the _second circuit side contact 13b in the axial direction when the assembly of the first housing member 21 and the second housing member 22 is completed. are placed facing each other with a space between them. Here, the orthogonal planes of the respective bases 13b ₁ and 31a are arranged to face each other.

On the other hand, when the first housing member 21 and the second housing member 22 have been assembled together, the pressing portion 31b of this example is pushed in the other side of the base portion 13b1 of the _second circuit side contact 13b in the axial direction. , and is brought into contact with the other orthogonal plane in an elastically deformed state. The pressing portion 31b is formed as a cantilevered elastic piece having a fixed end on the free end side of the base portion 31a, and is interposed between the respective base portions 13b ₁ and 31a in the axial direction.

In this example, when the first circuit connection member 12 is accommodated in the accommodation chamber 20a, the second peripheral wall 21c of the first housing member 21 faces the base 12b1 of the _first circuit side contact 12b in the axial direction. are placed. Therefore, in this illustration, the second peripheral wall body 21 c is used as the locking body 32 . Here, the other orthogonal plane of the base 12b- ₁ of the first circuit-side contact 12b is engaged with the inner wall surface between the third outlet 21c- ₁ and the fourth outlet 21c- ₂ of the second peripheral wall 21c.

In the holding structure 30 of the present embodiment, the assembly of the first housing member 21 and the second housing member 22 starts, and as the assembly operation progresses, the pressing portion 31b of the pressing body 31 contacts the second circuit side contact. The base 13b- ₁ of the contact 13b contacts the other orthogonal plane, and the base 12b- ₁ of the first circuit side contact 12b is locked by the locking body 32. As shown in FIG. In this holding structure 30, as the assembling operation proceeds further, the reaction force from the locking body 32 is transmitted to the pressing portion 31b of the pressing body 31, and the pressing portion 31b bends within the elastic range to the second circuit side. _An axial pressing force is applied to the base 13b1 of the contact 13b.

In this holding structure 30, when the assembly of the first housing member 21 and the second housing member 22 is completed, the pressing body 31 and the locking body 32 are axially aligned with the first circuit side contacts. The base portion 12b- ₁ of the contact 12b and the base portion 13b- ₁ of the second circuit side contact 13b can be sandwiched, and the sandwiched state can be maintained. Thus, in the filter circuit 10, the noise reduction element 11 can be kept held between the contact portion 12b2 of the first circuit side contact 12b and the contact portion _13b2 of the _second circuit side contact 13b. Therefore, in this filter circuit 10, between the contact portion 12b2 of the first circuit side contact 12b and the first element connection body of the noise reduction element 11, and between the contact portion 13b2 of the _second circuit _side contact 13b and the noise reduction element The electrical connection state with the 11th second element connector can be maintained. Along with this, the filter circuit 10 can maintain the electrical connection state between the first element connection body of the noise reduction element 11 and the intermediate connection portion WEa1 of the first wire WE1, and the noise reduction element The electrical connection state between the second element connector 11 and the intermediate connection portion WEa2 of the second wire WE2 can be maintained. Therefore, the noise filter 1 of the present embodiment can improve the quality of current flow between the filter circuit 10 and the first electric wire WE1 and the second electric wire WE2.

The noise filter 1 of this embodiment shown above is not affected by the intermediate electric wire. In other words, in the conventional noise filter, as described above, the intermediate wire is interposed between the noise reduction target wire and the filter circuit. The intermediate electric wire has a large length tolerance in consideration of assembling workability to the noise filter, wiring route to the vehicle, and the like. Therefore, in the conventional noise filter, it is necessary to adjust the filter circuit characteristics (resonance point, noise reduction performance, etc.) in consideration of the noise component of the intermediate wire according to its length. However, in the noise filter 1 of the present embodiment, the filter circuit 10 is provided between the intermediate connection portion WEa1 of the first electric wire WE1 and the intermediate connection portion WEa2 of the second electric wire WE2 bundled with the main line WT of the wire harness WH. By electrically interposing, the filter circuit 10 is electrically connected to the respective intermediate connection portions WEa1 and WEa2. Therefore, the noise filter 1 does not require adjustment of the filter circuit characteristics in consideration of the influence of branch wires (intermediate wires) from the main line as in the conventional art. That is, this noise filter 1 is not affected by the intermediate electric wire.

Furthermore, in the noise filter 1 of the present embodiment, the wire-side connection portion 12a of the first circuit connection member 12 and the wire-side connection portion 13a of the second circuit connection member 13 are connected to the first electric wire WE1 and the second electric wire WE2 running side by side. are pre-assembled. In this noise filter 1, the noise reduction element 11 is arranged between the respective wire side connection portions 12a and 13a, and the contact portion 12b2 of the first circuit side contact 12b in the first circuit connection member ₁₂ and the first element connection body of the noise reduction element 11 and between the contact portion 13b2 of the second circuit side contact 13b in the _second circuit connection member 13 and the second element connection body of the noise reduction element 11 in the axial direction to make an electrical connection. Therefore, the noise filter 1 can be reduced in size in the fitting direction (the arrangement direction of the first electric wires WE1 and the second electric wires WE2 and the direction orthogonal to the axial direction of the first electric wires WE1 and the second electric wires WE2). can. In addition, the noise filter 1 is arranged between the contact portion 12b2 of the first circuit side contact 12b and the _first element connection body of the noise reduction element 11 in the axial direction, and between the contact portion 13b2 of the _second circuit side contact 13b and the noise filter. Since the reduction element 11 is electrically connected to the second element connector, it is possible to reduce the size in the arrangement direction.

Furthermore, in this noise filter 1, the noise reduction element 11 is sandwiched between the first circuit side contact 12b of the first circuit connection member 12 and the second circuit side contact 13b of the second circuit connection member 13 in the axial direction. Thus, between the contact portion 12b2 of the first circuit side contact 12b and the first element connection body of the noise reduction element 11 and between the contact portion 13b2 of the _second circuit side contact 13b and the _second element connection of the noise reduction element 11 It is trying to make an electrical connection with the body. The noise filter 1 can keep its electrical connection state by the holding structure 30 . Therefore, the electrical connection structure of the noise filter 1 can be made smaller than a conventional structure in which male and female terminals are fitted together. Therefore, this noise filter 1 can suppress an increase in size in the axial direction. In addition, although such a conventional connection structure may lead to an increase in cost depending on the shape, this noise filter 1 can suppress an increase in cost because of such a simple connection structure.

Furthermore, in the noise filter 1 of the present embodiment, the filter circuit 10 is electrically connected to the intermediate connection portion WEa1 of the first electric wire WE1, one end of which is grounded. Even if there is no possible conductor, and even if the object to be installed is made of an insulating material such as synthetic resin, it can be easily grounded. In other words, the conventional noise filter is grounded via the installation object by connecting a ground terminal to the installation object when attached to the installation object. Therefore, in the conventional noise filter, the ground terminal protrudes from the housing in order to facilitate the work of fixing the ground terminal to the object to be installed. However, this noise filter 1 can be grounded without having such a ground terminal. Therefore, the noise filter 1 can be reduced in size and weight.

Moreover, the wire harness WH of the present embodiment is provided with such a noise filter 1, and the effect of obtaining this noise filter 1 can be achieved.

By the way, although not shown, the holding structure 30 replaces the locking body 32 with a pressing body 31, and the two pressing bodies 31 are used to hold the base portion 12b1 of the _first circuit side contact 12b and the base portion 13b1 of the _second circuit side contact 13b. may be sandwiched and the sandwiched state may be maintained. In other words, the holding structure 30 holds the first circuit-side contact 12b and the second circuit-side contact 13b by the axial pressing force acting on one of the first circuit-side contact 12b and the second circuit-side contact 13b. A first pressing body 31 that presses one of the first circuit-side contacts 12b and the second circuit-side contact 13b against the noise reduction element 11 and an axial pressing force acting on the other of the first circuit-side contact 12b and the second circuit-side contact 13b. A second pressing body 31 that presses the other of the two circuit-side contacts 13b against the noise reduction element 11 may be provided. The noise filter 1 and the wire harness WH of this embodiment can obtain the same effect as the previous example even if such a holding structure 30 is used.

[Modification]
Reference numeral 2 in FIGS. 8 to 12 indicates the noise filter of this modified example. Further, WH in each figure indicates the wire harness of this modified example. The noise filter 2 and the wire harness WH are obtained by replacing the filter circuit 10 with the filter circuit 110 described below and the housing 20 with the housing 120 described below in the noise filter 1 of the above-described embodiment. (Figures 8 to 12).

Similar to the filter circuit 10 of the embodiment, the filter circuit 110 of this modification includes at least one noise reduction element 11, a first circuit connection member 112, and a second circuit connection member 113 (FIGS. 8 to 12). .

The filter circuit 110 of this modification includes two substantially parallelepiped capacitors as the noise reduction elements 11, like the filter circuit 10 of the embodiment. However, when the two noise reduction elements 11 are accommodated in the housing 120, they are stacked in a state in which the first element connecting bodies are arranged facing each other with an interval in the axial direction (FIG. 8 from Figure 12). Like the filter circuit 10 of the embodiment, the two noise reduction elements 11 illustrated in this example are laminated with the thinnest thickness direction facing the arrangement direction (FIGS. 8 to 11).

The first circuit connection member 112 and the second circuit connection member 113 are electrically connected to each other through the noise reduction element 11, like the first circuit connection member 12 and the second circuit connection member 13 of the embodiment. It is a conductive member and is press-molded using a metal plate as a base material.

Like the first circuit connection member 12, the first circuit connection member 112 is pre-assembled to the intermediate connection portion WEa1 of the first electric wire WE1, and is housed in the housing chamber 120a of the housing 120 together with the first electric wire WE1. . The first circuit connection member 112 is connected to the wire side connection portion 112a physically and electrically connected to the intermediate connection portion WEa1 of the first wire WE1, and to the first element connection body of the noise reduction element 11. and a first contact (hereinafter referred to as “first circuit side contact”) 112b that is brought into contact and electrically connected along the axial direction (FIGS. 8 to 11).

The wire-side connection portion 112 a of this example is formed in the same shape as the wire-side connection portion 12 a of the first circuit connection member 12 . Therefore, the first circuit connection member 112 of this example is directly attached to the intermediate connection portion WEa1 of the first electric wire WE1 by crimping and assembling the wire side connection portion 112a to the intermediate connection portion WEa1 of the first electric wire WE1. Electrical connection is made (FIGS. 13 and 14).

On the other hand, the illustrated first circuit side contact 112b is arranged between the respective first element connecting bodies of the two noise reduction elements 11 when housed in the housing 120, and the respective first circuit side contacts 112b It is brought into contact with the element connector in the axial direction. Therefore, in the illustrated first circuit connection member 112, the first circuit side contact 112b is formed to protrude in the direction orthogonal to the axial direction from the wire side connection portion 112a assembled to the intermediate connection portion WEa1 of the first wire WE1. (Fig. 13).

The _first circuit side contact 112b of this example has a U-shaped base _112b1 having two opposed rectangular flat plates 112b11 and _two contact portions 112b2 for each noise reduction element 11. (FIGS. 13 and 14). Each flat plate 112b- ₁₁ of the base 112b- ₁ has a plane perpendicular to the axial direction. In the base portion 112b1, when housed in the housing 120, _one orthogonal plane of one flat plate _112b11 is arranged to face the first element connector of one noise reduction element 11 with a gap therebetween, In addition, one orthogonal plane of the other flat plate _112b11 is arranged to face the first element connector of the other noise reduction element 11 with a gap therebetween. The contact portion _112b2 is located between one orthogonal plane on one flat plate 112b11 and the first element connector of one noise reduction element ₁₁ and between one orthogonal plane on the other flat plate 112b11 and the noise reduction element ₁₁ on the other side. At least one is provided between each of the first element connecting bodies. The contact portion _112b2 is formed in a bulging shape bulging from _one orthogonal plane of the base portion 112b1 in order to obtain a stable contact load with the first element connector.

Like the second circuit connection member 13, the second circuit connection member 113 is pre-assembled to the intermediate connection portion WEa2 of the second electric wire WE2, and is housed in the housing chamber 20a of the housing 20 together with the second electric wire WE2. . The second circuit connection member 113 sandwiches the wire side connection portion 113a physically and electrically connected to the intermediate connection portion WEa2 of the second wire WE2 and the two noise reduction elements 11 in the axial direction. and two second contacts (hereinafter referred to as “second circuit side contacts”) 113b that are brought into contact with and electrically connected to the second element connecting bodies of the two noise reduction elements 11 along the axial direction. (Figures 8 to 12).

The wire-side connection portion 113a of this example is the same part as the wire-side connection portion 13a of the second circuit connection member 13, and two rectangular pieces opposed to each other with a space therebetween are connected to the middle of the second wire WE2. It is wound around the connecting portion WEa2 and crimped by crimping. By assembling the wire-side connection portion 113a to the intermediate connection portion WEa2 of the second wire WE2 in this manner, the wire-side connection portion 113a is directly electrically connected to the intermediate connection portion WEa2.

The second circuit-side contact 113b, like the second circuit-side contact 13b of the second circuit connection member 13, is accommodated in the housing 120 so that the second element connection body of the noise reduction element 11 extends in the axial direction. and is brought into contact with the second element connecting body in the axial direction. Therefore, the second circuit side contact 113b is formed so as to protrude in the direction orthogonal to the axial direction from the wire side connection portion 113a assembled to the intermediate connection portion WEa2 of the second wire WE2. The illustrated second circuit side contacts 113b protrude from both ends in the axial direction of the wire side connection portion 113a. The two second circuit side contacts 113b are formed so as to sandwich the two noise reduction elements 11 in the axial direction.

The second circuit side contact 113b is a contact portion that is brought into contact with and electrically connected to the second element connection body of the noise reduction element 11 that is arranged facing the axial direction of the rectangular plate _- shaped base portion 113b1 that cannot be elastically deformed. _113b2 and (FIGS. 8, 9, 12 and 15).

The base _113b1 has a plane orthogonal to the axial direction, and when accommodated in the housing 120, one orthogonal plane is axially spaced from the second element connector of the noise reduction element 11. Place them facing each other.

The contact portion 113b2 is made of an elastic material that is elastically deformable in the axial direction with respect to the base portion _113b1 in order to obtain a stable contact load between the contact portion 113b2 and the _second element connection body of the noise reduction element 11 that is arranged oppositely in the axial direction. It is formed as a contact part. This exemplary contact portion 113b2 is arranged axially between the base portion _113b1 and the _second element connector of the noise reduction element 11 when housed in the housing 120 . The contact portion 113b2 is elastically deformed to the side opposite to the _second element connection body of the noise reduction element 11 arranged opposite in the axial direction (that is, to the side of the base portion _113b1 to which the contact portion 113b2 is connected). The reaction force is formed and arranged to act on the second element connection body of the noise reduction element 11 in the opposing arrangement state as a pressing force in the axial direction, and is used as a holding structure 130 similar to the holding structure 30 of the embodiment (Figs. 8, 9, 12 and 15). In other words, the contact portions 113b2 of each of the two second circuit side contacts 113b are formed and arranged to sandwich the second element connecting bodies of the _two noise reduction elements 11 in the axial direction in such an elastically deformed state. The arrangement may act as a retention structure 130 similar to retention structure 30 . As a result, in the second circuit connection member 113, the contact portions 113b2 of the two second circuit side contacts 113b are axially aligned with respect to the _second element connection bodies of the noise reduction elements 11 arranged opposite to each other. can be contacted.

In the filter circuit 110, the contact portions 113b2 of the two second circuit side contacts 113b of the _second circuit connection member 113 sandwich the _two noise reduction elements 11 in the axial direction. The contact portion 112b2 of the first circuit-side contact 112b in the first circuit connection member 112 is electrically connected to the _second element connection body of the noise reduction element 11 arranged oppositely, and the contact portion 112b2 of the noise reduction element 11 arranged oppositely is connected to the second element connection body. It can be electrically connected to a one-element connector. Therefore, the filter circuit 110 electrically connects the first element connection bodies of the two noise reduction elements 11 to the intermediate connection portion WEa1 of the first electric wire WE1 via the first circuit connection member 112, and the second The second element connection bodies of the two noise reduction elements 11 can be electrically connected to the intermediate connection portion WEa2 of the second electric wire WE2 via the circuit connection member 113 .

Furthermore, in the filter circuit 110, the contact portions 113b2 of the two second circuit side contacts 113b of the second circuit connection member 113 sandwich the _two noise reduction elements 11 in the axial direction, thereby One noise reduction element 11 can be continuously sandwiched between the connection member 112 and one of the second circuit connection members 113, and between the first circuit connection member 112 and the other second circuit connection member 113 can continue to hold the other noise reduction element 11 between them. Therefore, this filter circuit 110 can maintain the electrical connection state between the first element connection body of each of the two noise reduction elements 11 and the intermediate connection portion WEa1 of the first wire WE1, It is possible to maintain an electrical connection state between the second element connection body of each of the reduction elements 11 and the intermediate connection portion WEa2 of the second electric wire WE2. Therefore, the noise filter 2 of this modified example can improve the quality of current flow between the filter circuit 110 and the first electric wire WE1 and the second electric wire WE2.

The housing 120 is molded from an insulating material such as synthetic resin. As with the housing 20 of the embodiment, the housing 120 forms a storage chamber 120a by fitting a first housing member 121 and a second housing member 122 together (FIG. 8). In this housing 120, the filter circuit 110, the first electric wire WE1 and the second electric wire WE2 are installed in the first housing member 121, and the second housing member 122 is fitted to the first housing member 121. match.

Like the first housing member 21 of the embodiment, the first housing member 121 includes a rectangular plate-like main wall 121a and four side portions of the main wall 121a vertically extending in the same direction. and flat plate-like first to fourth peripheral wall members 121b to 121e (FIG. 10). In the first housing member 121, a space surrounded by the main wall 121a and the first to fourth peripheral wall members 121b to 121e becomes a storage chamber 120a, and the filter circuit 110 and the first wire are placed in the storage chamber 120a. The WE1 and the second electric wire WE2 are accommodated through the opening 121f.

In the illustrated first housing member 121, for example, the assembly of the two noise reduction elements 11 and the first circuit connection member 112 and the first wire WE1 is accommodated in the accommodation chamber 120a, and then the accommodation chamber While housing the assembly of the second circuit connection member 113 and the second electric wire WE2 in 120a, two noise reductions are performed at the contact portions 113b2 of the _two second circuit side contacts 113b of the second circuit connection member 113. The element 11 is sandwiched.

Therefore, in the illustrated first housing member 121, when the two noise reduction elements 11 are sandwiched between the contact portions 113b2 of the _{two second} circuit side contacts 113b, the pressing force from the contact portions 113b2 is applied. A guide portion 121g is provided that allows the noise reduction element 11 to move relative to the first housing member 121 in the axial direction (FIGS. 9 and 16). The guide portion 121g is provided on the inner wall surface of the main wall body 121a and has two vertical walls _121g1 for locking two wall surfaces in the thickness direction of the two noise reduction elements 11 in the arrangement direction. . _Each vertical wall 121g1 guides the two noise reduction elements 11 in the axial direction by extending in the axial direction. Here, the guide portion 121g of this example may be used for positioning the two noise reduction elements 11 in the housing chamber 120a when the two noise reduction elements 11 are housed in the housing chamber 120a. Available.

The second housing member 122 is prepared to close the opening 121f of the storage chamber 120a. As with the second housing member 22 of the embodiment, the second housing member 122 includes a rectangular plate-like blocking wall 122a and four sides of the blocking wall 122a that are vertically installed in the same direction. First to fourth peripheral wall members 122b to 122e are flat plate-shaped (FIG. 11).

In this exemplary case 120, when the assembly of the first case member 121 and the second case member 122 is completed, the first peripheral wall members 121b and 122b are arranged to face each other, and , the second peripheral wall bodies 121c and 122c are arranged to face each other, the third peripheral wall bodies 121d and 122d are arranged to face each other, and the fourth peripheral wall bodies 121e and 122e are arranged to face each other.

In the housing 120, the first electric wire WE1 and the second electric wire WE2 are led out from the first peripheral wall members 121b, 122 arranged to face each other and the second peripheral wall members 121c, 122c arranged to face each other. Therefore, the first peripheral wall bodies 121b and 122b are provided with first lead-out openings 121b ₁ and 122b ₁ for drawing out one end side of the first electric wire WE1 and one end of the second electric wire WE2. Second drawer openings 121b ₂ and 122b ₂ are formed to draw out the ends (FIGS. 10 and 11). In each of the first peripheral wall bodies 121b and 122b, the first outlets 121b ₁ and 122b ₁ are arranged to face each other, and the second outlets 121b ₂ and 122b ₂ are arranged to face each other. Further, the second peripheral wall bodies 121c and 122c are provided with third lead-out openings 121c ₁ and 122c ₁ for drawing out the other end side of the first electric wire WE1 and the other end of the second electric wire WE2. Fourth drawer openings 121c ₂ and 122c ₂ are formed to draw out the ends (FIGS. 10 and 11). In each of the second peripheral wall bodies 121c and 122c, the third outlets 121c ₁ and 122c ₁ are arranged to face each other, and the fourth outlets 121c ₂ and 122c ₂ are arranged to face each other.

Also in this housing 120, the two noise reduction elements 11, the intermediate connection portion WEa1 of the first electric wire WE1 to which the first circuit connection member 112 is assembled, and the second circuit connection member 113 are assembled in the housing chamber 20a. and the intermediate connection portion WEa2 of the second electric wire WE2 thus formed are accommodated from the opening 121f. When housing the first electric wire WE1 and the second electric wire WE2, in the first housing member 21, the _{first electric wire WE1 is inserted into the first outlet} 121b1 and the third outlet 121c1, and the second electric wire WE2 is inserted into the _second outlet _121b2 and the fourth outlet 121c2. At that time, as shown above, the assembly of the two noise reduction elements 11 and the first circuit connection member 112 and the first wire WE1 is first accommodated in the accommodation chamber 120a, and then the accommodation chamber The assembly of the second circuit connection member 113 and the second electric wire WE2 is accommodated in 120a. Thereafter, in the housing 120, the opening 121f is closed, the _{first wire WE1 is inserted into the first outlet} 122b1 and the third outlet 122c1, and the second wire WE2 is inserted into the second outlet 122b. The _second housing member 22 is assembled to the first housing member 21 so as to be inserted into the fourth outlet _122c2 . For example, the noise filter 2 is fixed to the trunk line WT together with the first electric wire WE1 and the second electric wire WE2 with an adhesive tape (not shown) or the like, and is held by the trunk line WT. This completes the attachment of the noise filter 2 to the first electric wire WE1 and the second electric wire WE2.

The noise filter 2 of this modified example shown above can obtain the same effects as the noise filter 1 of the embodiment. Furthermore, in the noise filter 2 of this modified example, the second circuit connection member 113 has the function of the holding structure 130, so that the structure of the housing 120 can be simplified more than the noise filter 1 of the embodiment, so the cost is reduced. can be reduced. Moreover, the wire harness WH of this modified example is provided with such a noise filter 2, and the effect of obtaining this noise filter 2 can be achieved.

Reference Signs List 1, 2 noise filter 10, 110 filter circuit 11 noise reduction element 12 first circuit connection member 12a wire side connection portion 12b first circuit side contact 13 second circuit connection member 13a wire side connection portion 13b second circuit side contact 20, 120 Housing 30 Holding Structure 31 Pressing Body 32 Locking Body 112 First Circuit Connection Member 112a Wire Side Connection Part 112b First Circuit Side Contact 113 Second Circuit Connection Member 113a Wire Side Connection Part 113b Second Circuit Side Contact 113b ₁ Base 113b _2nd contact portion 130 holding structure WE1 first electric wire WEa1 intermediate connection portion WE2 second electric wire WEa2 intermediate connection portion WEa core wire WH wire harness WT trunk wire

Claims (4)

a filter circuit interposed between the first electric wire and the second electric wire running in parallel;
a housing that accommodates the filter circuit, the first wire, and the second wire;
a holding structure for holding an electrical connection state between the filter circuit and the first electric wire and the second electric wire;
with
The filter circuit includes a noise reduction element disposed between the first electric wire and the second electric wire along the arrangement direction of the first electric wire and the second electric wire, and an intermediate connection portion between the core wires of the first electric wire. and a conductive second circuit connection member assembled to the intermediate connection portion of the core wire of the second electric wire,
The first circuit connection member has a wire-side connection portion physically and electrically connected to the intermediate connection portion of the core wire of the first wire, and a first connection portion of the noise reduction element. a first circuit side contact for electrical connection by contacting the first electric wire and the second electric wire along the axial direction,
The second circuit connection member has a wire-side connection portion physically and electrically connected to the intermediate connection portion of the core wire of the second wire, and a second connection portion of the noise reduction element. a second circuit side contact for electrical connection by contacting along the axial direction;
The holding structure presses at least one of the first circuit side contact and the second circuit side contact against the noise reduction element with a pressing force along the axial direction, and the first circuit side contact in the axial direction. Holding the state of sandwiching the noise reduction element between the contact and the second circuit side contact, between the first circuit side contact and the first connection portion of the noise reduction element and between the second circuit side contact a pressing structure that maintains electrical connection between the noise reduction element and the second connection portion ,
The holding structure is provided in the housing,
The holding structure holds the first circuit-side contact and the second circuit-side contact by the axial pressing force acting on one of the first circuit-side contact and the second circuit-side contact. a pressing body for pressing one side against the noise reduction element; and a locking body that is locked in an axial direction and receives the pressing force . a filter circuit interposed between the first electric wire and the second electric wire running in parallel;
a housing that accommodates the filter circuit, the first wire, and the second wire;
a holding structure for holding an electrical connection state between the filter circuit and the first electric wire and the second electric wire;
with
The filter circuit includes a noise reduction element disposed between the first electric wire and the second electric wire along the arrangement direction of the first electric wire and the second electric wire, and an intermediate connection portion between the core wires of the first electric wire. and a conductive second circuit connection member assembled to the intermediate connection portion of the core wire of the second electric wire,
The first circuit connection member has a wire-side connection portion physically and electrically connected to the intermediate connection portion of the core wire of the first wire, and a first connection portion of the noise reduction element. a first circuit side contact for electrical connection by contacting the first electric wire and the second electric wire along the axial direction,
The second circuit connection member has a wire-side connection portion physically and electrically connected to the intermediate connection portion of the core wire of the second wire, and a second connection portion of the noise reduction element. a second circuit side contact for electrical connection by contacting along the axial direction;
The holding structure presses at least one of the first circuit side contact and the second circuit side contact against the noise reduction element with a pressing force along the axial direction, and the first circuit side contact in the axial direction. Holding the state of sandwiching the noise reduction element between the contact and the second circuit side contact, between the first circuit side contact and the first connection portion of the noise reduction element and between the second circuit side contact a pressing structure that maintains electrical connection between the noise reduction element and the second connection portion,
The filter circuit includes two noise reduction elements in which the first connection portions are arranged to face each other with an interval in the axial direction,
The first circuit-side contact is arranged between the first connection portions of the two noise reduction elements,
The second circuit connection member has two second circuit side contacts sandwiching the two noise reduction elements in the axial direction,
Each of the two second circuit side contacts includes a base portion that cannot be elastically deformed, and a contact portion that is brought into contact with and electrically connected to the second connection portion of the noise reduction element arranged opposite to the axial direction. have
Each of the contact portions is formed as an elastic contact portion capable of being elastically deformed in the axial direction with respect to the base portion, and is arranged on the opposite side of the noise reduction element arranged opposite to the axial direction. The holding structure is formed and arranged so as to be elastically deformed and a reaction force accompanying the elastic deformation acts as a pressing force in the axial direction on the second connection portion of the noise reduction element arranged in a facing manner. A noise filter characterized by using a main line including the first electric wire and the second electric wire;
a noise filter that reduces noise components;
with
The noise filter includes a filter circuit interposed between the first electric wire and the second electric wire that run in parallel, a housing that houses the filter circuit, the first electric wire and the second electric wire, and the filter circuit. and a holding structure that holds an electrical connection state between the first wire and the second wire,
The filter circuit includes a noise reduction element disposed between the first electric wire and the second electric wire along the arrangement direction of the first electric wire and the second electric wire, and an intermediate connection portion between the core wires of the first electric wire. and a conductive second circuit connection member assembled to the intermediate connection portion of the core wire of the second electric wire,
The first circuit connection member has a wire-side connection portion physically and electrically connected to the intermediate connection portion of the core wire of the first wire, and a first connection portion of the noise reduction element. a first circuit side contact for electrical connection by contacting the first electric wire and the second electric wire along the axial direction,
The second circuit connection member has a wire-side connection portion physically and electrically connected to the intermediate connection portion of the core wire of the second wire, and a second connection portion of the noise reduction element. a second circuit side contact for electrical connection by contacting along the axial direction;
The holding structure presses at least one of the first circuit side contact and the second circuit side contact against the noise reduction element with a pressing force along the axial direction, and the first circuit side contact in the axial direction. Holding the state of sandwiching the noise reduction element between the contact and the second circuit side contact, between the first circuit side contact and the first connection portion of the noise reduction element and between the second circuit side contact a pressing structure that maintains electrical connection between the noise reduction element and the second connection portion,
The holding structure is provided in the housing,
The holding structure holds the first circuit-side contact and the second circuit-side contact by the axial pressing force acting on one of the first circuit-side contact and the second circuit-side contact. a pressing body for pressing one side against the noise reduction element; and a locking body that is locked in an axial direction and receives the pressing force. a main line including the first electric wire and the second electric wire;
a noise filter that reduces noise components;
with
The noise filter includes a filter circuit interposed between the first electric wire and the second electric wire that run in parallel, a housing that houses the filter circuit, the first electric wire and the second electric wire, and the filter circuit. and a holding structure that holds an electrical connection state between the first wire and the second wire,
The filter circuit includes a noise reduction element disposed between the first electric wire and the second electric wire along the arrangement direction of the first electric wire and the second electric wire, and an intermediate connection portion between the core wires of the first electric wire. and a conductive second circuit connection member assembled to the intermediate connection portion of the core wire of the second electric wire,
The first circuit connection member has a wire-side connection portion physically and electrically connected to the intermediate connection portion of the core wire of the first wire, and a first connection portion of the noise reduction element. a first circuit side contact for electrical connection by contacting the first electric wire and the second electric wire along the axial direction,
The second circuit connection member has a wire-side connection portion physically and electrically connected to the intermediate connection portion of the core wire of the second wire, and a second connection portion of the noise reduction element. a second circuit side contact for electrical connection by contacting along the axial direction;
The holding structure presses at least one of the first circuit side contact and the second circuit side contact against the noise reduction element with a pressing force along the axial direction, and the first circuit side contact in the axial direction. Holding the state of sandwiching the noise reduction element between the contact and the second circuit side contact, between the first circuit side contact and the first connection portion of the noise reduction element and between the second circuit side contact a pressing structure that maintains electrical connection between the noise reduction element and the second connection portion,
The filter circuit includes two noise reduction elements in which the first connection portions are arranged to face each other with an interval in the axial direction,
The first circuit-side contact is arranged between the first connection portions of the two noise reduction elements,
The second circuit connection member has two second circuit side contacts sandwiching the two noise reduction elements in the axial direction,
Each of the two second circuit side contacts includes a base portion that cannot be elastically deformed, and a contact portion that is brought into contact with and electrically connected to the second connection portion of the noise reduction element arranged opposite to the axial direction. have
Each of the contact portions is formed as an elastic contact portion capable of being elastically deformed in the axial direction with respect to the base portion, and is arranged on the opposite side of the noise reduction element arranged opposite to the axial direction. The holding structure is formed and arranged so as to be elastically deformed and a reaction force accompanying the elastic deformation acts as a pressing force in the axial direction on the second connection portion of the noise reduction element arranged in a facing manner. A wire harness characterized by utilizing

Images