JP2020053392A - Wire harness - Google Patents

Abstract

To provide a wire harness capable of suppressing change in magnet characteristics even when using material, as a magnet body core, where the magnet characteristics is easily changed even when stress is applied, while reducing electromagnetic noise.SOLUTION: A wire harness includes a plurality of electric wires, an annular inside wall part wholly covering the plurality of electric wires, and an annular magnetic body core provided around the inside wall part.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a wire harness.

  2. Description of the Related Art Conventionally, a wire harness that is provided in a vehicle that uses, for example, an electric motor as a drive source and connects an inverter and an electric motor is known. As this kind of wire harness, a wire harness provided with a braided shield for reducing electromagnetic noise radiated from electric wires of the wire harness is known.

  Patent Literature 1 discloses a wire harness in which a magnetic core is provided in addition to a braided shield, so that electromagnetic noise radiated from the wire harness by the magnetic core is further reduced.

JP 2014-130708 A

  However, in Patent Literature 1, when a material (for example, a nanocrystalline soft magnetic material or the like) whose magnetic properties are easily changed when a stress is applied as a magnetic core is used, when a wire harness is arranged in a vehicle, There is a problem that the bent electric wire may come into contact with the magnetic core and change the magnetic characteristics of the magnetic core.

  Therefore, the present invention provides a wire capable of suppressing a change in magnetic characteristics even if a material whose magnetic characteristics easily change when stress is applied is used as a magnetic core, while reducing electromagnetic noise. The purpose is to provide a harness.

  An object of the present invention is to solve the above-described problems, a plurality of electric wires, an annular inner wall portion that covers the plurality of electric wires collectively, and an annular magnetic core provided around the inner wall portion. A wire harness provided with:

  ADVANTAGE OF THE INVENTION According to this invention, the wire which can suppress a change of a magnetic characteristic, even if it uses a material which a magnetic characteristic changes easily when a stress is applied as a magnetic core, reducing electromagnetic noise. Harness can be provided.

(A) is a perspective view which shows the external appearance of the wire harness which concerns on one Embodiment of this invention, (b) is the perspective view which omitted the braided shield in (a). It is a perspective view of a connector. FIG. 3 is a sectional view taken along line AA of FIG. 2. It is an exploded perspective view of a housing. It is a perspective view of a seal holding member. (A) is a perspective view of an electromagnetic wave suppression member, (b) is a fractured sectional view of an electromagnetic wave suppression member. It is an exploded perspective view of an electromagnetic wave suppression member. It is a figure showing the wire harness concerning one modification of the present invention, (a) is a perspective view and (b) is the sectional view. It is a figure which shows the wire harness which concerns on one modified example of this invention, (a) is a perspective view, (b) is the broken sectional view. FIG. 10 is a perspective view illustrating fixing means of a movement restricting portion in the wire harness of FIG. 9.

[Embodiment]
Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

(Description of the overall structure of the wire harness)
FIG. 1A is a perspective view showing an appearance of a wire harness according to the present embodiment, and FIG. 1B is a perspective view in which the braided shield is omitted.

  As shown in FIGS. 1A and 1B, the wire harness 1 includes an electric wire 2 and a connector 3 provided at an end of the electric wire 2.

  The wire harness 1 is mounted on a vehicle such as an electric vehicle or a hybrid vehicle that uses an electric motor as a drive source, and is used to supply a PWM (Pulse Width Modulation) -controlled current output from an inverter to the electric motor. Can be This current contains a high-frequency component due to switching of a switching element such as a power transistor.

  In the present embodiment, the wire harness 1 is configured to use three electric wires 2 and supply a three-phase alternating current of U-phase, V-phase, and W-phase to the electric motor.

  Each of the electric wires 2 includes a conductor 2a formed by twisting a plurality of strands of an electric conductor and an insulator 2b made of an insulating resin provided on the outer periphery of the conductor 2a.

  A connection terminal 21 is connected to an end of each electric wire 2. The connection terminal 21 integrally includes a caulked portion 21a caulked and fixed to an end of the conductor 2a, and a plate-shaped connecting portion 21b extending from the caulked portion 21a. The connection portion 21b has a connection hole 21c for fixing a bolt, which penetrates the connection portion 21b in the thickness direction. The connection terminal 21 is fixed to the device-side connection terminal by fixing the connection portion 21b to a corresponding device-side connection terminal provided on a terminal block in a member to be connected (for example, in an inverter). Electrically connected.

  A braided shield 4 is provided around the three electric wires 2 so as to collectively cover the three electric wires 2. The braided shield 4 is formed, for example, by knitting a plurality of shield wires made of tin-plated copper. Here, the braided shield 4 is formed by combining the six shield wires into one wire bundle and crossing the wire bundles in an X-shape and knitting them. The inner diameter of the braided shield 4 can be expanded and contracted by changing the size of the stitches by, for example, a manual operation.

  An electromagnetic wave suppressing member 8 according to the present embodiment is provided around the braided shield 4. Details of the electromagnetic wave suppression member 8 will be described later.

  Although not shown, a corrugated tube for protecting the electric wire 2 may be provided on the outer periphery of the braided shield 4 (portion where the electromagnetic wave suppressing member 8 is not provided). The corrugated tube is a tubular member made of resin, and has a bellows shape in which large-diameter portions and small-diameter portions are alternately formed.

(Description of connector 3)
FIG. 2 is a perspective view of the connector 3, and FIG. 3 is a sectional view taken along line AA of FIG. FIG. 4 is an exploded perspective view of the housing 5 of the connector 3. FIG. 5 is a perspective view of the seal holding member 72 of the connector 3.

  As shown in FIGS. 2 and 3, the connector 3 includes a housing member 31 housed in a mounting hole (not shown) formed in a housing member (for example, an inverter) and a housing member 31 along the electric wire 2. And an electric wire holding member 32 arranged side by side.

  The electric wire holding member 32 holds the electric wire 2 and fixes the electric wire 2 to a member to be attached (for example, an inverter). The wire holding member 32 includes a housing (wire holder) 5 made of an insulating resin and a shield shell (shield case) 6 made of a conductive metal.

  As shown in FIGS. 2 to 4, the housing 5 includes an electric wire support portion 52 that supports the electric wire 2, an outer wall portion 53 that covers the electric wire support portion 52, and a connecting portion 54 that connects the electric wire support portion 52 and the outer wall portion 53. And are integrally provided. The housing 5 is made of an insulating resin such as PBT (polybutylene terephthalate), PA (polyamide), or PPS (polyphenylene sulfide), and is formed by, for example, injection molding.

  The electric wire support 52 is formed in a cylindrical shape having an insertion hole 51 through which the electric wire 2 is inserted, and is configured to sandwich the electric wire 2 inserted through the insertion hole 51. Here, three wire support portions 52 are provided corresponding to the three wires 2. The invention is not limited thereto, and for example, an integrated wire support having three insertion holes 51 may be provided. The three electric wire support portions 52 are arranged at regular intervals in the direction perpendicular to the longitudinal direction of the electric wire 2, and are configured to hold the three electric wires 2 in an aligned state. Hereinafter, the longitudinal direction of the electric wires 2 in the connector 3 is referred to as a length direction, the arrangement direction of the electric wires 2 is referred to as a width direction, and the direction perpendicular to the length direction and the width direction is referred to as a height direction.

  The outer wall portion 53 is formed in a tubular shape, and is provided so as to be separated from each of the electric wire support portions 52 and to cover each of the electric wire support portions 52 collectively. The connecting portion 54 includes a rib-shaped connecting piece 54 a that connects the center portion and both side portions in the width direction of the wire supporting portion 52 to the outer wall portion 53, and the wire supporting portion 52 and the outer wall portion 53 at the distal end side of the wire 2. And a front wall 54b provided so as to close the gap between the front wall 54b and the front wall 54b.

  In the present embodiment, the housing 5 is vertically divided at the center in the height direction, and the two divided housings 5 are fixed and integrated by fixing means including a lance 55.

  The shield shell 6 is provided on the outer periphery of the outer wall portion 53 by press fitting. The shield shell 6 is made of a conductive metal such as iron, brass, or aluminum, and is configured to house at least a part of the housing 5. A plurality of rib-shaped protrusions 53a formed along the length direction are formed at a peripheral portion of the outer wall 53 at the end on the wire insertion side. The ribs 53a are press-fitted by the protrusions 53a. The shield shell 6 thus formed is configured to be firmly fixed to the housing 5.

  The shield shell 6 is provided so as to cover a periphery of an outer wall 53 of the housing 5, and is provided so as to protrude outward from an end on the distal end side of the cylindrical portion 61. (E.g., an inverter). A band-shaped fastening member 64 is provided on the outer periphery of the shield shell 6, and the braided shield 4 is fixed to the outer periphery of the shield shell 6 by the fastening member 64, and the tubular portion 61 is fastened by the housing. 5 is fixed.

  As shown in FIGS. 3 and 5, the housed member 31 is a member housed in a mounting hole (not shown) formed in a member to be mounted (for example, an inverter), and is larger than the flange portion 62 of the shield shell 6. It is located on the tip side.

  The housed member 31 has a seal holding member 72 having three insertion holes 71 through which the electric wires 2 are inserted, and is held on the outer peripheral surface of the seal holding member 72. An outer peripheral seal member 76 that seals between them, and an inner peripheral seal member (wire seal) 74 that is held on the inner peripheral surface of the insertion hole 71 and seals between the insertion hole 71 and the electric wire 2 are provided. In FIG. 5, the outer peripheral seal member 76 and the inner peripheral seal member 74 are omitted.

  The seal holding member 72 is made of, for example, an insulating resin such as PBT (polybutylene terephthalate), PA (polyamide), or PPS (polyphenylene sulfide).

  The outer peripheral seal member 76 is formed in an annular shape, and is disposed in an outer peripheral seal member groove 75 formed on the outer periphery of the seal holding member 72 along the circumferential direction. The outer peripheral seal member 76 is interposed between the seal holding member 72 and the inner surface of the mounting hole of the member to be mounted (for example, an inverter), and water enters the member to be mounted (for example, the inverter) from outside the seal holding member 72. Restrain that.

  The inner peripheral seal member 74 is formed in an annular shape, and is disposed in an inner peripheral seal member groove 73 formed along the circumferential direction at an end of the seal holding member 72 on the housing 5 side of the insertion hole 71. The inner peripheral seal member 74 is interposed between the insulator 2b of the electric wire 2 and the seal holding member 72, and suppresses the entry of moisture into the attached member (for example, the inverter) along the electric wire 2.

  At the base end of the seal holding member 72, a locking projection 77 projecting toward the base end is integrally formed. The locking projection 77 connects the rectangular parallelepiped head 77a, the head 77a and the seal holding member 72, and has a shaft portion formed in a rectangular parallelepiped shape (a prismatic shape) having a smaller width and height than the head 77a. (Neck) 77b.

  A locking groove 56 for locking the locking projection 77 is formed in the front wall 54 b of the housing 5. The locking groove 56 has a head receiving portion 56a having a larger width, height and length than the head 77a that receives the head 77a of the locking projection 77, and a width and height smaller than the head 77a, A shaft housing 56b having a width and height greater than that of the shaft 77b and a length shorter than the shaft 77b, and the head housing 56a opens forward through the shaft housing 56b. It is configured as follows.

  By housing the head 77a in the head housing 56a and the shaft 77b in the shaft housing 56b and locking the locking projection 77 in the locking groove 56, the shield shell 6 can be attached to a member to be mounted (for example, an inverter). At the time of fixing to the housing of (2), the seal holding member 72 becomes relatively movable with respect to the electric wire holding member 32. In the present embodiment, the seal holding member 72 is movable with respect to the housing 5 in the length direction, the width direction, and the height direction.

  With this configuration, even if the electric wire holding member 32 (the shield shell 6 or the housing 5) rotates or tilts due to the bending of the electric wire 2 or the torque when the shield shell 6 is bolted, the rotation or the tilt is sealed. It becomes difficult for the holding member 72 to follow, and it is possible to suppress that the waterproof function is lost due to, for example, only a part of the outer peripheral seal member 76 being excessively crushed.

  Here, the case where the head 77a and the shaft 77b of the locking projection 77 are formed in a rectangular parallelepiped shape (or a prismatic shape) has been described, but the shapes of the head 77a and the shaft 77b are not limited thereto. For example, the head portion 77a and the shaft portion 77b may have a columnar shape, or the head portion 77a may have a spherical shape.

  The means for connecting the seal holding member 72 and the electric wire holding member 32 (housing 5) so as to be relatively movable is not limited to the locking projection 77 and the locking groove 56. For example, a hook (lance) having elasticity is extended from one of the seal holding member 72 and the housing 5, and a locking portion for locking the hook is provided on the other of the seal holding member 72 and the housing 5. Even in a state where the seal holding member 72 and the housing 5 are connected to each other by being locked to the portion, the seal holding member 72 and the wire holding member 32 (housing 5) can be configured to be relatively movable by the elasticity of the hook. It is.

(Explanation of the electromagnetic wave suppressing member 8)
FIG. 6A is a perspective view of the electromagnetic wave suppressing member 8, and FIG. 6B is a cutaway view thereof.

  As shown in FIGS. 1 and 6, the electromagnetic wave suppressing member 8 is provided so as to cover the outer periphery of the electric wire 2, and is provided around a regulating member 81 having an inner wall portion 81 a that is harder than the electric wire 2, and around the inner wall portion 81 a. And an annular magnetic core 82 made of a nanocrystalline soft magnetic material. Here, “hard” means that it is harder to bend when trying to bend both ends of the same length (for example, unit length).

  In the present embodiment, the magnetic core 82 is made of a nanocrystalline soft magnetic material. The nanocrystalline soft magnetic material is a material in which nanocrystal grains of a ferromagnetic phase are dispersed in a remaining amorphous phase by crystallizing an amorphous alloy. The magnetic core 82 may be made of a soft magnetic material such as soft ferrite.

  Here, Finemet (registered trademark) was used as the nanocrystalline soft magnetic material. The magnetic core 82 made of Finemet (registered trademark) is made of, for example, a single molten alloy containing Fe (-Si) -B as a basic component and a small amount of Cu and elements such as Nb, Ta, Mo, and Zr added thereto. An amorphous metal ribbon having a thickness of about 20 μm is formed once by a rapid quenching method such as a roll method, and then formed into a magnetic core shape (in this case, an annular shape covering the three electric wires 2 at a time), and then heat-treated at a crystallization temperature or higher. Formed by crystallization. The crystal grain size in the magnetic core 82 is about 10 nm. The magnetic core 82 may be made of a nanocrystalline soft magnetic material other than Finemet (registered trademark), for example, NANOMET (registered trademark).

  The nanocrystalline soft magnetic material has a high saturation magnetic flux density and excellent soft magnetic properties (high magnetic permeability and low magnetic core loss properties) as compared with conventionally used soft magnetic materials such as soft ferrite. Therefore, by using a nanocrystalline soft magnetic material as the magnetic core 82, the magnetic core 82 can be reduced in size. As a result, it is possible to suppress an increase in the size and mass of the electromagnetic wave suppressing member 8 and to keep the entire wire harness 1 compact and lightweight even when the electromagnetic wave suppressing member 8 is attached. The size (thickness and length) of the magnetic core 82 may be appropriately set in consideration of the characteristics of the nanocrystalline soft magnetic material to be used, etc., to obtain desired characteristics.

  In addition, the nanocrystalline soft magnetic material also has a characteristic that it can suppress electromagnetic wave noise in a frequency band used for radio such as AM radio, as compared with a soft magnetic material such as soft ferrite which has been conventionally used. In a vehicle, since road information and the like are provided by an AM radio, when the wire harness 1 is applied to the vehicle, it can be said that the effect of suppressing electromagnetic noise in a frequency band used for the radio is great.

  However, the nanocrystalline soft magnetic material has a property that the magnetic properties are easily changed when an external stress is applied. Therefore, when the magnetic core 82 made of a nanocrystalline soft magnetic material is used, it is necessary to adopt a configuration in which no external stress is applied to the magnetic core 82.

  Therefore, in the present embodiment, the electromagnetic wave suppressing member 8 is configured such that an inner wall portion 81a that is harder than the electric wire 2 is provided, and an annular magnetic core 82 made of a nanocrystalline soft magnetic material is provided around the inner wall portion 81a. did. Accordingly, no stress is applied to the magnetic core 82 even when the electric wire 2 is bent, and a change in the magnetic characteristics of the magnetic core 82 can be suppressed. That is, the regulating member 81 (the inner wall portion 81 a) regulates the movement of the electric wire 2 when the electric wire 2 is bent, thereby suppressing the electric wire 2 from interfering with the magnetic core 82. Play a role in protecting

  In the present embodiment, the entire regulating member 81 is made of a material harder than the electric wire 2. However, the present invention is not limited to this, and at least the inner wall portion 81 a may be made of a material harder than the electric wire 2. The regulating member 81 is made of, for example, an insulating resin such as PBT (polybutylene terephthalate), PA (polyamide), or PPS (polyphenylene sulfide).

  When the magnetic core 82 protrudes in the length direction (the longitudinal direction of the electric wire 2) from the inner wall portion 81 a, the protruding portion of the magnetic core 82 interferes with the bent electric wire 2 and the magnetic core 82 Since the magnetic characteristics may change, it is desirable that the magnetic core 82 be provided so as not to protrude in the longitudinal direction of the electric wire 2 from the inner wall portion 81a.

  When the inner wall portion 81a is formed thicker, the distance between the magnetic core 82 and the electric wire 2 increases, so that the magnetic core 82 is slightly longer in the length direction (the longitudinal direction of the electric wire 2) than the inner wall portion 81a. Even if it protrudes, there is no possibility that the electric wire 2 will interfere with the magnetic core 82. However, as the distance between the electric wire 2 and the magnetic core 82 increases, the circumference of the stacked magnetic cores 8 increases, and the effect of suppressing electromagnetic waves decreases. That is, as in the present embodiment, by providing the magnetic core 82 so as not to protrude beyond the inner wall 81a in the longitudinal direction of the electric wire 2, the thickness of the inner wall 81a is made smaller (the magnetic core 82 and the electric 2 is reduced), and a change in the magnetic characteristics of the magnetic core 82 can be suppressed while enhancing the effect of suppressing electromagnetic waves.

  In the present embodiment, the regulating member 81 has a cylindrical outer wall portion 81b provided so as to cover the inner wall portion 81a and the magnetic core 82 so as to sandwich the magnetic core 82 between the inner wall portion 81a and the inner wall portion 81a. And a front wall portion 81c and a rear wall portion 81d as regulating portions for suppressing the magnetic core 82 from falling off between the inner wall portion 81a and the outer wall portion 81b.

  The outer wall portion 81b plays a role of preventing a surrounding member (a vehicle body or the like) from interfering with the magnetic material core 82 and changing the magnetic characteristics of the magnetic material core 82. It is formed so that it may cover.

  The front wall portion 81c connects the ends of the inner wall portion 81a and the outer wall portion 81b on the connector 3 side, and is configured to close a gap between the inner wall portion 81a and the outer wall portion 81b. The rear wall portion 81d is configured to connect end portions of the inner wall portion 81a and the outer wall portion 81b on the opposite side to the connector 3, and to close a gap between the inner wall portion 81a and the outer wall portion 81b. That is, the regulating member 81 is formed in a ring shape as a whole, and has a rectangular cross section perpendicular to the circumferential direction.

  In the present embodiment, the inner wall portion 81a is formed in a tubular shape that collectively covers the three electric wires 2 and the braided shield 4, and is configured to hold the three electric wires 2 in an aligned state. ing. That is, the regulating member 81 is configured to hold the three electric wires 2. More specifically, the inner wall portion 81a contacts the braided shield 4 and holds the three electric wires 2 via the braided shield 4. Further, in the present embodiment, a fixing portion 83 for fixing the electromagnetic wave suppressing member 8 to a vehicle body or the like is formed on the regulating member 81. Specifically, the electromagnetic wave suppression member 8 is attached to both ends of the outer wall portion 81b in the alignment direction (long axis direction) of the electric wires 2 so as to protrude outward in the alignment direction (long axis direction) of the electric wires 2 such as a vehicle body. A fixing portion 83 for fixing to a fixed object is formed. A bolt hole 83a for passing a bolt for bolt fixing is formed in the fixing portion 83, and a hollow cylinder made of metal for suppressing deformation of the regulating member 81 at the time of bolt fastening is formed around the bolt hole 83a. An annular collar 83b is provided. The object to be fixed is not limited to the vehicle body, but may be a housing of a motor device, a housing of an inverter device, or the like. Since the restricting member 81 is provided with the fixing portion 83 for fixing the electromagnetic wave suppressing member 8 to the object to be fixed such as a vehicle body, it is possible to reduce the necessity of separately providing a fixing member. There is an effect that reduction of the number is possible. As described above, in the present embodiment, the regulating member 81 serves as a housing for accommodating the magnetic core 82 and serves as a movement regulating unit for regulating movement of the regulating member 81 along the longitudinal direction of the electric wire 2. It also has a role.

  In the present embodiment, an inner wall portion 81a is formed so as to cover the entire three wires 2 at a time, and a magnetic core is formed around the inner wall portion 81a so as to cover the three wires 2 at a time. 82 are provided. However, the present invention is not limited to this, and an inner wall portion may be formed so as to cover each electric wire 2 individually, and a magnetic core 82 may be provided so as to cover each electric wire 2 individually. However, in this case, it is necessary to make the interval between the electric wires 2 (the interval between the inner walls individually provided around each electric wire 2) large enough to accommodate the magnetic core 82, which leads to an increase in the size of the electromagnetic wave suppressing member 8. There are cases. That is, by providing the magnetic core 82 so as to cover the plurality of electric wires 2 at a time, the electromagnetic wave suppressing member 8 is reduced in size.

  When the electromagnetic wave suppressing member 8 is to be more firmly fixed at a predetermined position in the longitudinal direction of the electric wire 2, the adhesive tape is further wound to fix the electromagnetic wave suppressing member 8 to the electric wire 2, or the electric wire 2 is attached to the electric wire 2. A clip member to be sandwiched may be provided to suppress the movement of the electromagnetic wave suppression member 8 along the longitudinal direction of the electric wire 2 due to the interference of the clip member.

  In the present embodiment, the electromagnetic wave suppressing member 8 is provided around the braided shield 4, but is not limited to this, and the electromagnetic wave suppressing member 8 is provided inside the braided shield 4, that is, between the electric wire 2 and the braided shield 4. May be configured. In this case, it is difficult to fix the electromagnetic wave suppressing member 8 to a vehicle body or the like by fixing the fixing portion 83 with a bolt. Therefore, the fixing portion 83 is omitted, and the braided shield 4 and the electromagnetic wave suppressing member 8 are fixed by a dedicated fixing member. May be configured to be collectively held and fixed to a vehicle body or the like. By providing the electromagnetic wave suppressing member 8 around the braided shield 4 as in the present embodiment, it is not necessary to prepare a separate fixing member, and the number of components can be reduced.

  As shown in FIG. 7, the regulating member 81 may have a divided configuration. Here, a first member 84 including a front wall portion 81c and a second member 85 including an inner wall portion 81a, an outer wall portion 81b, and a rear wall portion 81d are provided, and the inner wall portion 81a and the outer wall portion 81b of the second member 85 are provided. After the magnetic core 82 is accommodated in the space 86 surrounded by the rear wall portion 81d and the first member 84 and the second member 85 are fixed and integrated, the electromagnetic wave suppressing member 8 is configured. . The method for fixing the first member 84 and the second member 85 is not particularly limited. For example, the first member 84 may be fixed by an adhesive using an adhesive or mechanically fixed by a locking mechanism using a lance or the like. The first member 84 and the second member 85 can be fixed and integrated.

(Operation and effect of the embodiment)
As described above, the wire harness 1 according to the present embodiment includes the electromagnetic wave suppression member 8 provided around the electric wire 2, and the electromagnetic wave suppression member 8 is provided so as to cover the outer periphery of the electric wire 2. A regulating member 81 having an inner wall portion 81a that is harder than 2 is provided, and an annular magnetic core 82 made of a nanocrystalline soft magnetic material provided around the inner wall portion 81a. The magnetic core 8 is made of a nanocrystalline soft magnetic material.

  By using the magnetic core 82 made of a nanocrystalline soft magnetic material, the magnetic core 82 can be reduced in size as compared with a conventionally used ferrite core or the like, and a small and lightweight electromagnetic wave suppressing member 8 can be realized. By reducing the size of the electromagnetic wave suppression member 8, the wiring harness 1 can be easily arranged in a narrow place, and the layout of the wiring harness 1 can be more freely arranged. Further, by reducing the weight of the electromagnetic wave suppressing member 8, an increase in the mass of the wire harness 1 when the electromagnetic wave suppressing member 8 is attached can be suppressed, and the handleability of the wire harness 1 can be improved.

  The nanocrystalline soft magnetic material is a material whose magnetic properties are liable to change when stress is applied. However, the magnetic core 82 is provided around the inner wall portion 81a which is harder than the electric wire 2 so that the electric wire 2 When the magnetic core 82 is bent, vibration of the electric wire 2 or the like does not apply a load to the magnetic core 82, it is possible to suppress a change in the magnetic characteristics of the magnetic core 82.

(Modification)
In the above embodiment, the inner wall portion 81a is configured to hold the three electric wires 2, but the inner wall portion 81a may not be configured to hold the three electric wires 2. That is, a clearance may be provided between the inner wall portion 81a and the braided shield 4.

  In this case, as in a wire harness 1a shown in FIGS. 8A and 8B, a housing 86 for housing a magnetic core 82 and a regulating member 81 fixed to the electric wire 2 (via the braided shield 4). The movement restricting portion 87 for restricting the movement of the electric wire 2 in the longitudinal direction may be arranged along the longitudinal direction of the electric wire 2. That is, the accommodating portion 86 and the movement restricting portion 87 may be formed at different positions in the longitudinal direction of the electric wire 2, and these may be integrated into the restricting member 81.

  The accommodation portion 86 is substantially the same as the regulating member 81 shown in FIG. 6, and is formed in an annular shape having an inner wall portion 81a, an outer wall portion 81b, a front wall portion 81c, and a rear wall portion 81d. However, in the wire harness 1a, there is a gap between the inner wall portion 81a and the electric wire 2. By providing a gap between the inner wall portion 81a and the electric wire 2, the work of passing the electric wire 2 and the braided shield 4 through the inner wall portion 81a becomes easier, and the work of attaching the electromagnetic wave suppressing member 8 becomes easier.

  The movement restricting portion 87 holds the three electric wires 2 via the braided shield 4 so that the restricting member 81 (the electromagnetic wave suppressing member 8) does not move along the longitudinal direction of the electric wire 2 so that the restricting member 81 ( The electromagnetic wave suppressing member 8) is fixed to the electric wire 2.

  The movement restricting portion 87 is in a state where the cylindrical portion 87a formed in a tubular shape that covers the three electric wires 2 (and the braided shield 4) collectively and the three electric wires 2 (and the braided shield 4) are sandwiched. Fixing means 87b for fixing the shape of the cylindrical portion 87a.

  The cylindrical portion 87a has a cross section perpendicular to the axial direction in a rounded rectangular shape (a shape formed by two parallel lines of equal length and two semicircular arcs connecting the ends of the parallel lines). ing. The inner peripheral surface of the cylindrical portion 87a is in contact with the braided shield 4. The tubular portion 87a is preferably harder than the electric wire 2 like the inner wall portion 81a.

  In the wire harness 1a, the cylindrical portion 87a is connected to the housing portion 86 (here, the rear wall portion 81d) only in a part in the circumferential direction (for example, only one parallel line portion). In addition, the cylindrical portion 87a is cut at one location in the circumferential direction (here, one end portion in the alignment direction (long axis direction) of the electric wires 2 or the center portion of one semicircular arc), and at the cut portion. It is configured to be openable.

  Further, in the wire harness 1a, the fixing means 87b connects the two ends in the circumferential direction of the cylindrical portion 87a (the ends facing each other across the cut portion) so that the three electric wires 2 (and the braided shield) are connected. The configuration is such that the shape of the cylindrical portion 87a is fixed in a state where 4) is sandwiched. Here, the fixing means 87b includes a lance 88 and a locking hole 89 for locking the lance 88.

  The electric wire 2 and the braided shield 4 are passed through the accommodating portion 86 with the tubular portion 87a opened, and then the lance 88 is locked in the locking hole 89. And the regulating member 81 can be fixed to the electric wire 2.

  The fixing means 87b may be any as long as it can fix the shape of the cylindrical portion 87a while sandwiching the three electric wires 2 (and the braided shield 4). For example, the fixing means 87b is wound around the outer periphery of the cylindrical portion 87a. A fastening band that clamps the three electric wires 2 (and the braided shield 4) by fastening the tubular portion 87a may be used.

  In this manner, the wire harness 1a is configured such that the movement restricting portion 87 is constituted by the tubular portion 87a that can be opened at the cut portion and the fixing means 87b. It is possible to pass the three electric wires 2 (and the braided shield 4) through the inside, and then to clamp the electric wires 2 by the fixing means 87a. Therefore, it is possible to easily pass the three electric wires 2 (and the braided shield 4) through the regulating member 81 to improve the workability of the work of attaching the electromagnetic wave suppression member 8, and to firmly connect the regulating member 81 to the electric wire. 2 can be fixed.

  Although FIG. 8 illustrates the case where a gap is provided between the inner wall portion 81a and the braided shield 4, the gap between the inner wall portion 81a and the braided shield 4 is eliminated (or the gap is reduced) in FIG. 81a (accommodating portion) may have a function of holding the electric wire 2. However, in this case, since it is difficult to pass the electric wire 2 and the braided shield 4 through the housing 86, it is more desirable to have a gap between the inner wall portion 81a and the braided shield 4.

  As a means for integrating the accommodation portion 86 and the movement regulation portion 87, a method of bonding the accommodation portion 86 and the movement regulation portion 87 with an adhesive or the like, a method of mechanically fixing with a screwing or locking mechanism, Alternatively, it is possible to adopt a method in which the movement restricting portion 87 is integrally molded with the housing portion 86 using a resin (the same resin as the housing portion 86). Here, the housing portion 86 and the movement restricting portion 87 are integrally formed by injection molding.

  Further, in the wire harness 1a of FIG. 8, the case where the movement restricting portion 87 is fixed to the electric wire 2 via the braided shield 4 has been described, but as in the case of the wire harness 1b shown in FIGS. 9 (a) and 9 (b). Alternatively, the movement restricting portion 87 may be fixed to a member that covers the periphery of the electric wire 2.

  In the wire harness 1b shown in FIG. 9, three wires 2 extending from the connector 3 are bundled (the line connecting the central axes of the wires 2 in a cross section perpendicular to the longitudinal direction of the wires 2 has a triangular shape (a regular triangle). ), The outer periphery of which is covered with a braided shield 4, and the outer periphery of the braided shield 4 is covered with a corrugated tube 9 which is a cylindrical member made of a resin having a bellows structure and made of a resin. . In the wire harness 1b, the movement restricting portion 87 is fixed to the corrugated pipe 9.

  The accommodation section 86 and the movement restricting section 87 are formed along the outer periphery of the corrugated pipe 9. Here, since the cross section in the direction perpendicular to the longitudinal direction uses the corrugated pipe 9 having a circular shape, the accommodation portion 86 and the movement restricting portion 87 are formed in a substantially annular shape.

  Also in the modification shown in FIG. 9, the electromagnetic wave suppression member 8 includes a regulating member 81 and a magnetic core 82, and the regulating member 81 has an inner wall portion 81 a that is harder than the electric wire 2 and a cylindrical shape that covers the magnetic core 82. It has an outer wall portion 81b, a front wall portion 81c and a rear wall portion 81d which regulate the movement of the magnetic core 82 to suppress the magnetic core 82 from falling off. Further, the inner wall portion 81a is harder than the corrugated pipe 9 and is less likely to bend than the corrugated pipe 9. Thus, even when the plurality of electric wires 2 are bent together with the corrugated tube 9, stress due to the bending is less likely to be generated in the magnetic core 82.

  In the wire harness 1a of FIG. 8, the movement restricting portion 87 is provided on the side of the housing 86 opposite to the connector 3, but in the wire harness 1b of FIG. Is provided.

  Further, in FIG. 8, the fixing portion 83 for fixing the electromagnetic wave suppressing member 8 to an object to be fixed such as a vehicle body or a vehicle-mounted device such as a motor is integrally formed in the housing portion 86. However, in the wire harness 1b in FIG. The fixed portion 83 is formed integrally with the movement restricting portion 87. In the wire harness 1b, a block-shaped fixing portion 83 is formed so as to protrude radially outward from the cylindrical portion 87a. For example, by forming a screw hole for screwing a fixing bolt in the fixing portion 83, the fixing portion 83 can be bolt-fixed to a fixing target such as a vehicle body. In addition, the fixing part 83 may be provided in both the housing part 86 and the movement restricting part 87, or the fixing part 83 may be provided between the housing part 86 and the movement restricting part 87.

  As shown in FIG. 10, in the wire harness 1b, the cylindrical portion 87a of the movement restricting portion 87 is cut at the end of the fixed portion 83 and can be opened. The fixing means 87b includes a tongue part 872 extending from an end of the cylindrical part 87a (an end facing the fixing part 83), and a guide hole formed at the end of the fixing part 83 and into which the tongue part 872 is inserted. 873, a locking projection 874 projecting from the periphery of the guide hole 873 toward the guide hole 873, and the locking projection 874 formed on the end of the cylindrical portion 87 a (the end facing the fixed portion 83). And a locking groove 871 having a concave shape.

  The tongue portion 872 and the guide hole 873 are formed so as to extend in a tangential direction of a circle centered on the central axis of the cylindrical portion 87a (the central axis of the inner wall) when the tongue portion 872 is inserted into the guide hole 873. I have. The tongue portion 872 and the guide hole 873 serve as a guide when the locking protrusion 874 and the locking groove 871 are locked. Note that the relationship between the protrusion and the groove may be reversed, and a locking groove 871 may be formed on the fixed portion 83 side, and a locking protrusion 874 may be formed on the cylindrical portion 87a side (tongue portion 872 side). .

(Summary of Embodiment)
Next, technical ideas grasped from the embodiments described above will be described with reference to the reference numerals and the like in the embodiments. However, each reference numeral and the like in the following description does not limit constituent elements in the claims to members and the like specifically shown in the embodiments.

[1] A plurality of electric wires (2), an annular inner wall portion (81a) that covers the plurality of electric wires (2) collectively, and an annular magnetic core provided around the inner wall portion (81a). 82). A wire harness (1) comprising:

[2] The wire harness (1) according to [1], wherein the magnetic core (82) is made of a nanocrystalline soft magnetic material.

[3] The magnetic properties of the magnetic core (82) are determined by a distance from the magnetic core (82) to the electric wire (2) and a stress applied to the magnetic core (82). The wire harness (1) according to [1] or [2].

  The embodiments of the present invention have been described above, but the embodiments described above do not limit the invention according to the claims. Also, it should be noted that not all combinations of the features described in the embodiments are necessarily indispensable for means for solving the problems of the invention.

  The present invention can be appropriately modified and implemented without departing from the spirit thereof.

  For example, in the above embodiment, the case where the number of the electric wires 2 is three is described, but the number of the electric wires 2 is not limited, and for example, the number of the electric wires 2 may be one, two, or four or more. .

DESCRIPTION OF SYMBOLS 1 ... Wire harness 2 ... Electric wire 3 ... Connector 4 ... Braided shield 8 ... Electromagnetic wave suppression member 81 ... Restriction member 81a ... Inner wall part 81b ... Outer wall part 81c ... Front wall part (restriction part)
81d: Rear wall (regulator)
82: magnetic core 83: fixed part

Claims (3)

Multiple wires,
An annular inner wall portion that collectively covers the plurality of electric wires,
An annular magnetic core provided around the inner wall,
Wire harness with. The magnetic core is made of a nanocrystalline soft magnetic material,
The wire harness according to claim 1. The magnetic properties of the magnetic core are determined by a distance from the magnetic core to the electric wire and a stress applied to the magnetic core.
The wire harness according to claim 1.

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