JP2021157921A - Assembled electric wire and its fixed structure - Google Patents

Abstract

To provide an assembled electric wire that blocks leakage of high-frequency noise in a structure in which a plug is joined to a plug seat arranged outside of a housing and a shielding part fixed structure of the assembled electric wire.SOLUTION: In an assembled electric wire 10 in which a plug 11 and at least one electric wire 12 connected to the plug 11 are arranged from the tip end to the end, and at least one electric wire 12 is covered with a conductive covering member 13 made of an electric conductor, a shielding part 20 in which a tip end side protrudes with respect to the tip end of the plug 11 to open and the electric wire 12 is inserted in the center part on the end side to cover the surrounding of the plug 11 is provided, the shielding part 20 is made of an electric conductor and is brought into conduction with conductive covering part 13, the tip end part closely adheres to an outer surface 6 of the housing 2, and both of the plug 11 and the plug seat 1 are arranged in a space 7 shielded from both of the shielding part 20 and the outer surface 6.SELECTED DRAWING: Figure 1

Description

The present disclosure relates to a braided electric wire and a fixed structure thereof, and more particularly to a braided electric wire in which the electric wire is coated with a conductive coating member made of an electric conductor and a fixed structure in which the assembled electric wire is fixed to a housing.

When an electric wire such as an electrostatic shielded cable is coated with a conductive coating member made of an electric conductor, the effect of blocking noise is exhibited by grounding the conductive coating member (see, for example, Patent Document 1). ..

Japanese Unexamined Patent Publication No. 2008-198414

When the plug joined to the tip of the electric wire is connected to the plug seat arranged inside the housing as described in Patent Document 1, the housing covers the plug and the periphery of the plug seat. This makes it possible to block high-frequency noise.

However, when the plug seat is arranged on the outside of the housing, the plug and the plug seat are joined on the outside of the housing, and the plug, the plug seat, or the plug seat is placed on the outside. Leakage of high-frequency noise from the lead-out hole formed in the housing for derivation becomes remarkable.

An object of the present disclosure is to provide a braided electric wire and a fixing structure thereof for blocking leakage of high-frequency noise in a configuration in which a plug is joined to a plug seat arranged on the outside of a housing.

In the assembled electric wire of one aspect of the present invention that achieves the above object, a plug and at least one electric wire connected to the plug are arranged from the tip to the end, and the at least one electric wire is electric. In a braided electric wire covered with a conductive coating member made of a conductor, the tip side of the plug is projected and opened, and the wire is inserted into the end side to cover the periphery of the plug. The shielding portion is made of an electric conductor, conducts with the conductive coating member in a grounded state, and a plug seat whose tip portion is joined to the plug is led out to the outside. It is characterized in that both the plug and the plug seat are arranged in a space shielded by the shielding portion and the outer surface of the housing in close contact with the outer surface.

In the fixed structure of the assembled electric wire of one aspect of the present invention that achieves the above object, a plug and at least one electric wire connected to the plug are arranged from the tip to the end, and the at least one wire is arranged. In the fixed structure of the assembled electric wire, in which the assembled electric wire in which the electric wire is covered with a conductive coating member made of an electric conductor is fixed to the housing in which the plug seat to be joined to the plug is led out to the outside. The assembled electric wire is provided with a shielding portion that extends from the tip end side of the plug and opens, and the electric wire is inserted into the end side to cover the periphery of the plug, and the shielding portion is made of an electric conductor. In a state where the conductive coating member is electrically connected in a grounded state, the plug and the plug seat are joined, and the assembled electric wire is fixed to the housing, the tip of the shielding portion is the housing. It is characterized in that both the plug and the plug seat are arranged in a space shielded by the shielding portion and the outer surface of the housing in close contact with the outer surface of the housing.

According to one aspect of the present invention, the plug seat led out to the outside of the housing and the plug joined to the plug seat are shielded by a shielding portion conductive with the conductive coating member and the outer surface of the housing. By arranging it in the space, it is possible to block the leakage of high-frequency noise from the plug, the plug seat, or the lead-out hole formed in the housing for leading the plug seat to the outside.

It is a perspective view which illustrates the grouped electric wire of embodiment. It is a front view which illustrates the shielding part of FIG. It is a front view which illustrates the grounding part of FIG. FIG. 5 is a cross-sectional view illustrating a fixed structure in which the assembled electric wire of FIG. 1 is fixed to a housing.

The assembled electric wire (also referred to as a wire harness) and its fixing structure in the present disclosure will be described below. In the figure, the X direction is the insertion / removal direction of the plug 11 of the assembled wire 10 with respect to the plug seat 1, the Z direction is the vertical direction, and the Y direction is the direction orthogonal to each of the X direction and the Z direction.

Further, in the present embodiment, the tip side indicates the lower right front side of FIG. 1 which is the tip side of the assembled wire 10, and the end side indicates the upper left back side of FIG. 1 which is the end side of the assembled wire 10 (not shown). And. The front view is a view from the tip to the end in the X direction. Further, in the present embodiment, the inside means the radial inside of the assembled wire 10, and the outside means the radial outside of the assembled wire 10.

In addition, in the present embodiment, the plug 11 is attached to the side of the electric wire 12, and the plug seat 1 is attached to the side of the electronic device 3 housed inside the housing 2. The plug 11 and the plug seat 1 are also referred to as connectors and terminals, respectively.

In FIG. 1, a plurality of metal wires are crocheted in order to clearly indicate that the conductive covering members 13 and 14 are braided pipes, but in FIGS. 2 to 4, the crochet is omitted in order to avoid complication. do.

As illustrated in FIG. 1, the assembled electric wire 10 of the embodiment performs power supply and signal communication via the electric wire 12 by joining the plug seat 1 and the plug 11 to conduct electricity, and at least one. It consists of a book wire 12. The assembled electric wire 12 may be a bundle of a plurality of electric wires 12. The assembled electric wire 10 includes a plug 11, an electric wire 12, conductive coating members 13 and 14, and a coating member 15, and the plug 11 and the electric wire 12 are arranged from the tip to the end, and the electric wire 12 is a conductive coating member. It is configured to be covered with 13, 14 and a covering member 15.

The shape of the plug 11 is not limited as long as it is electrically joined to the tip of the electric wire 12 and is joined to the plug seat 1 to conduct the electric wire 12. The number of plugs 11 is provided according to the number of plug seats 1. It should be noted that each of the plurality of electric wires 12 may be configured such that one plug 11 is joined to one plug seat 1, and a plurality of plugs 11 joined to each of the plurality of electric wires 12 may be connected to a plurality of plugs 11. It may be configured to be joined to the plug seat 1. The electric wire 12 is an insulated electric wire formed by covering a linear core wire made of a good conductor and the core wire with an insulator.

The conductive coating members 13 and 14 are composed of an electric conductor. Specifically, the conductive coating members 13 and 14 are composed of braided pipes in which a plurality of metal wires are woven. Examples of the metal wire include copper, copper alloy, aluminum, aluminum alloy, nickel-plated copper and the like. The braided tube is a metal mesh tube formed by entwining a plurality of metal wires, and glass fibers or the like may be mixed in addition to the metal wires. Each of the conductive coating members 13 and 14 may be conductive to each other, and the main metal wire of the braided pipe may be different, but it is preferable that the main metal wire is the same.

Each of the conductive coating members 13 and 14 covers from the tip to the end of the electric wire 12, so that the electric wire 12 is multiplely coated by the conductive coating members 13 and 14. The conductive coating member 13 is arranged inside the conductive coating member 14, and the electric wire 12 is arranged adjacent to the inside. The conductive coating member 14 is arranged outside the conductive coating member 13 and further covers the electric wire 12 coated with the conductive coating member 13.

The covering member 15 is a member that further covers the electric wire 12 coated with the conductive covering members 13 and 14, and is made of an insulator.

The assembled electric wire 10 of the present embodiment is configured to include a shielding portion 20 and a grounding portion 30 on the tip end side. The assembled electric wire 10 is in a state of electrostatic shielding when the grounding portion 30 is grounded, and the shielding portion 20 is configured to shield high-frequency noise leaking from the plug 11 and the plug seat 1.

In the present disclosure, grounding indicates that it is connected to a reference point of an electric potential in an electric circuit, and the reference point is not limited to the case of the ground. For example, in the case of a vehicle, the reference point may be a frame or a chassis.

As illustrated in FIGS. 1 and 2, the shielding portion 20 is composed of a conductive covering member 13 in which an electric wire 12 is arranged adjacent to the inside. The shielding portion 20 has an opening 21 formed at the tip and an electric wire insertion hole 22 formed at the end.

The opening 21 projects from the tip of the plug 11 toward the tip in the X direction to open. That is, the opening 21 which is the tip of the shielding portion 20 is formed at a position closer to the tip in the X direction than the tip of the plug 11. The electric wire insertion hole 22 is formed in the central portion when viewed in the X direction, and the electric wire 12 is inserted therethrough.

The shielding portion 20 forms an enlarged diameter tubular whose inner diameter increases from the electric wire insertion hole 22 toward the opening 21, and covers the periphery of the plug 11. That is, the shielding portion 20 is configured so that the plug 11 is included in the internal space. In the present disclosure, the diameter-expanding tubular may be any shape as long as the inner diameter increases from the electric wire insertion hole 22 toward the opening 21, and a hollow hemispherical shape, a bowl shape, and a bell shape are exemplified.

The shielding portion 20 has a double structure in which the tip end portion of the braided pipe constituting the conductive coating member 13 is folded inward. The tip of the braided pipe folded inward is led out from the wire insertion hole 22 toward the end.

As illustrated in FIGS. 1 and 3, the ground contact portion 30 is composed of the conductive coating member 14 arranged outside the conductive coating member 13. The grounding portion 30 has a grounding piece 31 formed at the tip portion, an insertion hole 32 for a shielding portion formed at an intermediate portion, and a tubular portion 33 formed at the end portion.

The grounding piece 31 projects from the tip of the shielding portion 20 toward the tip in the X direction, and the braided pipe constituting the conductive covering member 14 forms a plate shape crushed in the Z direction, which is the pipe radial direction. The insertion hole 32 for the shielding portion is configured such that the tip end side of the shielding portion 20 is open so as to be able to be led out. The insertion hole 32 for the shielding portion is a hole formed by widening the mesh of the intermediate portion of the braided pipe of the conductive coating member 14 on the lower side in the Z direction. The opening surface of the insertion hole 32 for the shielding portion is inclined so that the upper portion in the Z direction is located closer to the tip side than the lower portion with respect to the YZ plane. The tubular portion 33 has a tubular shape that covers the entire circumference of the shielding portion 20 on the terminal side.

As illustrated in FIG. 4, the fixed structure of the assembled electric wire 10 of the present embodiment will be described. This fixing structure is a structure in which the plug 11 is electrically joined to the plug seat 1 and the braided electric wire 10 is fixed to the housing 2, and the grounding portion 30 is fixed to the housing 2 so as to be grounded and shielded. The structure is such that both the plug 11 and the plug seat 1 are covered by the portion 20.

The housing 2 is made of a good conductor and is grounded to a vehicle body frame or chassis (not shown). The housing 2 houses the electronic device 3 inside. The plug seat 1 is electrically connected to the electronic device 3 via the electric wire 4 for the electronic device, and is led out to the outside of the housing 2 from the lead-out hole 5 formed in the housing 2.

The plug 11 of the assembled electric wire 10 is joined to the plug seat 1. Then, the grounding piece 31 of the grounding portion 30 of the assembled wire 10 is pulled toward the housing 2, that is, toward the left side in the X direction. Following the pull of the grounding portion 30, the shielding portion 20 is pulled toward the housing 2, and the edge of the opening 21 which is the tip portion of the shielding portion 20 extends to the outer surface 6 of the housing 2 over the entire circumference. In close contact. When the tip end portion of the shielding portion 20 is in close contact with the outer surface 6, the contact plug 11 and the contact plug seat 1 are arranged in the space 7 surrounded by the shielding portion 20 and the outer surface 6.

Next, the grounding piece 31 of the grounding portion 30 is brought into surface contact with the outer surface 8 of the housing 2 and fixed so as to be grounded by the adhesive tape 9. In the present embodiment, the housing 2 is a good conductor and is in a state of being grounded to the reference potential, and the grounding portion 30 is electrically connected to the housing 2 by bringing the grounding piece 31 into direct surface contact with the outer surface 8 of the housing 2. The assembled electric wire 10 is electrostatically shielded via the grounding portion 30. The assembled wire 10 of this embodiment is an electrostatic shielded cable, and grounding is not required on the terminal side (not shown).

By fixing the grounding portion 30, the tip portion of the shielding portion 20 is in close contact with the outer surface 6 of the housing 2, and the plug 11 and the plug seat 1 are arranged in the space 7 covered by the shielding portion 20 and the outer surface 6. At the same time, the assembled electric wire 10 is fixed to the housing 2.

As described above, the braided electric wire 10 and the fixed structure of the braided electric wire 10 of the present disclosure conduct the plug 11 and the plug seat 1 joined to each other with the conductive coating members 13 and 14 in the electrostatically shielded state. It is arranged in the space 7 shielded by the shielding portion 20 and the outer surface 6 of the housing 2. Therefore, it is possible to block the leakage of high frequency noise from the plug 11, the plug seat 1, and the lead-out hole 5. This makes it possible to reduce the influence of high-frequency noise on surrounding electronic devices.

Since the shielding portion 20 of the present embodiment has a double structure in which the tip end portion of the braided pipe is folded inward, it is possible to prevent the end portion of the braided pipe from being exposed to the outer peripheral surface or the inner peripheral surface of the shielding portion 20. .. The tip of the braided pipe is not smooth and is in a state of being easily unraveled. Therefore, by configuring as in the present embodiment, it is advantageous to prevent the braided pipe from being unknitted and the end portion of the braided pipe from being caught. It is desirable that the tip end portion of the braided pipe is led out to the end side of the electric wire insertion hole 22 of the shielding portion 20.

The grounding portion 30 of the present embodiment has a plane parallel to the XY plane because the grounding piece 31 forms a plate shape formed by crushing the braided pipe in the Z direction. Therefore, it becomes easy to fix the grounding piece 31 to the grounded surface, and it is possible to secure a sufficient contact area with respect to the surface. This is advantageous for surely putting the assembled electric wire 10 in a state of electrostatic shielding.

Further, since the grounding piece 31 has a plate shape and projects from the tip of the shielding portion 20, it is easy to pull the assembled electric wire 10 when connecting it to the electronic device 3. Therefore, the workability of the connection can be improved.

Further, the grounding portion 30 has a structure in which the tubular portion 33 covers the entire circumference of the shielding portion 20 on the terminal side, so that when the grounding piece 31 at the tip is pulled from the end toward the tip, the grounding portion 30 follows the pull. The shielding portion 20 is pulled from the end toward the tip. As a result, the force with which the shielding portion 20 is pressed against the outer surface 6 of the housing 2 is strengthened, which is advantageous for improving the adhesion between the shielding portion 20 and the outer surface 6 of the housing 2, and improves the shielding property of high frequency noise. Can be made to.

Although the embodiments according to the present disclosure have been described above, the present disclosure is not limited to such specific embodiments, and various modifications and changes can be made within the scope of the claims. be. The following modification will be described.

The assembled electric wire 10 of the present disclosure may be configured to include only the shielding portion 20. If the conductive coating member 13 that covers the electric wire 12 can be electrically connected to the housing 2 by the tip of the shielding portion 20 being in close contact with the outer surface 6 of the housing 2, the grounding portion 30 is not always essential. When the assembled electric wire 10 is configured to include only the shielding portion 20, the tip portion of the shielding portion 20 may be fixed with the adhesive tape 9.

However, in order to ensure that the assembled electric wire 10 is in an electrostatically shielded state, it is desirable to provide a grounding portion 30 separately from the shielding portion 20 as in the present embodiment. The grounding portion 30 may be formed in a linear shape as long as it is conductive with any outer surface of the housing 2 and can be grounded.

The braided electric wire 10 of the present disclosure is a separate body from the conductive coating member 13 in which the shielding portion 20 covers the electric wire 12, and is composed of a braided pipe in which a plurality of conductive metal wires are woven with the conductive coating member 13. May be good. Similarly, the grounding portion 30 may be formed of a braided pipe in which a plurality of metal wires conductive to the conductive coating member 14 are woven separately from the conductive coating member 14 that covers the electric wire 12. ..

For example, the conductive coating member that covers the electric wire 12 may be made single, and each of the shielding portion 20 and the grounding portion 30 may be formed of a separate braided pipe, and each may be conductively assembled to the conductive coating member. Further, the conductive coating member that covers the electric wire 12 is made single, the shielding portion 20 is composed of the conductive coating member, and only the grounding portion 30 is composed of a separate braided pipe so that the conductive coating member can be electrically connected to the shielding portion 20. It may be assembled in.

In the present disclosure, the fact that the shielding portion 20 and the grounding portion 30 conduct with the conductive coating member that covers the electric wire 12 is separate from the fact that the shielding portion 20 and the grounding portion 30 are composed of the conductive coating member. It shall include being configured and conducted to the conductive coating member.

When the shielding portion 20 and the grounding portion 30 are formed separately, the conductive coating member that covers the electric wire 12 from the tip to the end may be a single layer. That is, when each of the shielding portion 20 and the grounding portion 30 is composed of a braided pipe in which a plurality of metal wires are woven, a plurality of electric wires 12 are provided at a portion including at least the tip portion from the tip to the end of the wire 12. The braided pipe is covered in multiple layers.

When the shielding portion 20 is formed separately from the conductive coating member that covers the electric wire 12, the tip portion folded inside the braided pipe in the double structure is used with respect to the conductive coating member that covers the electric wire 12. It is advisable to wrap it with tape to fix it and make it conductive.

Further, the shielding portion 20 and the grounding portion 30 are not limited to the braided pipe in which a plurality of metal wires are woven, and may be formed of a metal foil. When the shielding portion 20 is made of a metal foil, it is not necessary to fold the tip portion of the metal foil inward.

The braided electric wire 10 of the present disclosure is a plate-shaped wire formed by crushing a braided pipe in which a plurality of metal wires are woven into a shielding portion 20 in the radial direction, or a metal foil is spirally wound in the circumferential direction of the electric wire 12. It may be configured by turning. When the braided pipe or the metal foil is spirally wound, it is desirable to wind the braided pipe or the metal foil a plurality of times so that a gap is not generated in the shielding portion 20 as a multiple structure. Further, the ground contact portion 30 may be formed of a wound surplus portion.

In the assembled electric wire 10 of the present disclosure, the housing 2 for accommodating the electronic device 3 to be connected may be made of an insulator. In this case, the shielding portion 20 and the grounding portion 30 may be grounded to the signal ground of the base of the electronic device 3 via fasteners or electric wires, or may be directly grounded to the frame or chassis.

1 Plug seat 2 Housing 6, 8 Outer surface 7 Space 10 Paired wire 11 Plug 12 Wire 13, 14 Conductive coating member 20 Shielding part 21 Opening 22 Wire insertion hole 30 Grounding part 31 Grounding piece 32 Insertion for shielding part Hole 33 Cylinder

Claims (9)

In a braided electric wire in which a plug and at least one electric wire connected to the plug are arranged from the tip to the end, and the at least one electric wire is covered with a conductive coating member made of an electric conductor. ,
The tip side of the plug is projected so as to open, and the electric wire is inserted through the end side to provide a shielding portion that covers the periphery of the plug.
The shielding portion is made of an electric conductor, conducts with the conductive coating member in a grounded state, and the plug seat whose tip portion is joined to the plug is in close contact with the outer surface of the housing led out to the outside. A braided electric wire, characterized in that both the plug and the plug seat are arranged in a space shielded by the shielding portion and the outer surface of the housing. The braided electric wire according to claim 1, wherein the shielding portion is composed of a braided pipe in which a plurality of metal wires are woven, and the tip portion of the braided pipe has a double structure folded inside the shielding portion. A grounding portion arranged on the outside of the shielding portion and having a tip side protruding from the tip of the shielding portion is provided.
The assembled electric wire according to claim 1 or 2, wherein the grounding portion is made of an electric conductor, conducts with the conductive coating member, and is fixed to the outer surface of the housing so as to be grounded. The grounding portion is composed of a braided pipe in which a plurality of metal wires are woven.
The braided electric wire according to claim 3, wherein the tip of the grounding portion is formed into a plate shape by crushing the braided pipe in the pipe radial direction. The grounding portion has a cylindrical shape whose end side covers the end side of the shielding portion, an insertion hole for the shielding portion is formed at an intermediate position, and the tip end side of the shielding portion is derived from the insertion hole for the shielding portion, and the shielding portion is provided. The assembled electric wire according to claim 3 or 4, wherein the tip side from the insertion hole for a part has a plate shape. The at least one electric wire is covered with the conductive coating member composed of a braided pipe in which a plurality of metal wires are woven at a portion including at least the tip portion from the tip to the end.
The assembled electric wire according to any one of claims 1 to 5, wherein the shielding portion is composed of the conductive coating member. At a portion from the tip to the end including at least the tip, the at least one electric wire is multiplely covered with the plurality of conductive coating members composed of a braided tube in which a plurality of metal wires are woven.
Any one of claims 3 to 5, wherein the shielding portion is composed of one of the plurality of braided pipes, and the grounding portion is composed of the other braided pipe of the plurality of braided pipes. The assembled electric wire described in. A braided electric wire is formed by arranging a plug and at least one electric wire connected to the plug from the tip to the end, and the at least one electric wire is covered with a conductive coating member made of an electric conductor. In the fixed structure of the assembled electric wire, in which the plug seat joined to the plug is fixed to the housing led out to the outside.
The assembled electric wire is provided with a shielding portion in which the tip side of the plug is projected and opened from the tip of the plug, and the wire is inserted into the end side to cover the periphery of the plug, and the shielding portion is made of an electric conductor. Conducting with the conductive coating member in a grounded state,
In a state where the plug and the plug seat are joined and the assembled electric wire is fixed to the housing, the tip end portion of the shielding portion is in close contact with the outer surface of the housing, and the plug and the plug are plugged. A fixed structure of a braided electric wire, characterized in that both of the seats are arranged in a space shielded by the shielding portion and the outer surface of the housing. The assembled electric wire is arranged outside the shielding portion and has a grounding portion whose tip side projects from the tip of the shielding portion, and the grounding portion is made of an electric conductor and conducts with the conductive coating member.
The grounding portion is fixed to the outer surface of the housing so as to be grounded in a state where the plug and the plug seat are joined, and the tip of the shielding portion is brought into close contact with the outer surface of the housing by fixing the grounding portion. The fixing structure of the assembled electric wire according to claim 8, wherein the assembled electric wire is fixed to the housing.

Images