JP2013237309A - Wiring structure of wire harness - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent an LED lamp connected to a sub wire harness from being instantaneously lit.SOLUTION: A wiring structure of a wire harness includes a wire harness routed in a vehicle. A sub wire harness 3 is connected to the wire harness through a connector. An LED lamp is connected to the sub wire harness 3 through the other connector 4 and a lead. The length of the sub wire harness 3 is set longer than a standard length. A plurality of U-shaped folded-back parts 3a, 3b, 3c, 3d are provided to the extended part of the sub wire harness.

Description

  The present invention relates to a wiring structure of a wire harness, and in particular, a wire that can prevent a flash (light) of an LED (Light Emitting Diode) lamp connected to one end of a sub-wire harness via a connector. The wiring structure of the harness.

  In general, as shown in FIG. 4, a wire harness 10 for supplying electric power and signals to various electrical components and the like mounted on the vehicle is wired in the vehicle, and the wire harness 10 is connected via a connector 20. An LED lamp 50 is connected to one end portion of the sub-wire harness 30 branched through the other connector 40 (for example, Patent Document 1).

  By the way, in such a wiring harness wiring structure, when a radio device (for example, taxi radio) 60 having an antenna is mounted outside the vehicle and a high electric field is radiated from the antenna of the radio device 60, the antenna electric field An electromotive force is generated in the conductor of the nearby sub-wire harness 30 and, as a result, a noise current flows through the conductor, which may cause the LED lamp 50 connected to the sub-wire harness 30 to blink.

  In the figure, reference numeral 70 indicates a lead wire for connecting between the connector 40 and the LED lamp 50.

  For this reason, in the wiring structure of the conventional wire harness, as shown in FIG. 5, (b) the ferrite core 80 is provided in the sub-wire harness 30, or (b) the sub-wire harness as shown in FIG. 30 is provided with a shield sheet 90 or the like.

  However, in the configuration in which the ferrite core 80 of (A) is provided, although the magnetic field component of the noise current can be reduced by the ferrite core 80 with respect to the radio wave from the antenna of the radio device 60, a separate ferrite is provided in the sub-wire harness 30 The core 80 had to be attached, and there was a problem that the cost was increased as a whole. In addition, in the configuration in which the shield sheet of (b) is provided, although the electric field component of the noise current can be reduced by the shield sheet 90, a separate shield sheet 90 is provided in the sub-wire harness 30 as in (a). There was a difficulty that it had to be attached and the cost was increased overall.

JP-A-5-235625 Japanese Unexamined Patent Publication No. Hei 6-197036 JP 2002-87171 A

  This invention was made in order to solve the above-mentioned difficulty, and by forming a U-shaped folding | returning part in the arbitrary locations of a subwire harness, the wire harness which can prevent the blinking of an LED lamp The purpose is to provide a routing structure.

  The wiring structure of the wire harness according to the first aspect of the present invention is a wiring structure of a wire harness in which an LED lamp is connected to the sub-wire harness, and a U-shaped folded portion is provided at an arbitrary position of the sub-wire harness. It is provided.

  According to the wiring structure of the wire harness according to the first aspect, since the U-shaped folded portion is provided in the sub-wire harness, the direction of the current in the folded portion is reversed, The generated magnetic field component can be canceled out. Therefore, according to the present invention, even if an electromotive force is generated in the conductor of the sub-wire harness due to the high electric field radiated from the antenna of the radio device mounted in the vehicle and the noise current flows through the conductor, Since the magnetic field component can be reduced, the blinking of the LED lamp connected to the sub-wire harness can be prevented. In addition, according to the present invention, since the blinking of the sub-wire harness can prevent the LED lamp from flashing, it is simpler and less expensive than the sub-wire harness with the conventional ferrite core and shield sheet attached. And the wiring structure of a versatile wire harness can be provided.

  According to a second aspect of the present invention, in the wiring structure of the wire harness according to the first aspect, the folded portion is formed in a meandering manner by a plurality of folded portions.

  According to the wiring structure of the wire harness that is the second aspect, in addition to the operation and effect of the wiring structure of the wire harness that is the first aspect, the folded portion is formed in a meandering manner by a plurality of folded portions. For this reason, the magnetic field component can be canceled more reliably, and as a result, it is possible to more reliably prevent the LED lamp from flashing.

  According to a third aspect of the present invention, in the wiring harness wiring structure according to the first aspect or the second aspect, the wire length of the sub-wire harness is set longer than the standard length.

  According to the wiring structure of the wire harness that is the third aspect, in addition to the operation and effect of the wiring structure of the wire harness that is the first aspect or the second aspect, the wire length of the sub-wire harness is longer than the standard length. By setting the length too long, the sub-wire harness itself does not easily function as an antenna, that is, the sub-wire harness is less likely to resonate with the radio frequency, thereby reducing the generation of noise.

  The wire harness routing structure according to the first to third aspects of the present invention has the following effects.

  1stly, since the U-shaped folding | turning part is provided in the subwire harness, the direction of the electric current in a folding | turning part becomes reverse, and the component of the magnetic field produced by the said electric current can be canceled. Therefore, according to the present invention, even if an electromotive force is generated in the conductor of the sub-wire harness due to the high electric field radiated from the antenna of the radio device mounted outside the vehicle and the noise current flows through the conductor, Since the magnetic field component can be reduced, the blinking of the LED lamp connected to the sub-wire harness can be prevented. In addition, according to the present invention, since the blinking of the sub-wire harness can prevent the LED lamp from flashing, it is simpler and less expensive than the sub-wire harness with the conventional ferrite core and shield sheet attached. And the wiring structure of a versatile wire harness can be provided.

  Secondly, when the folded portion is formed in a meandering manner by a plurality of folded portions, the magnetic field component can be canceled more reliably, and as a result, the LED lamp can be more reliably prevented from flashing.

  Third, when the wire length of the sub-wire harness is set longer than the standard length, the sub-wire harness itself is difficult to function as an antenna, that is, the sub-wire harness is configured to hardly resonate with the radio frequency. Thus, the generation of noise can be reduced.

Explanatory drawing which shows typically one Example of the wiring structure of the wire harness in this invention. Explanatory drawing which shows typically the folding | turning part provided in the arbitrary places of the subwire harness in this invention. The principal part enlarged view of the folding | turning part shown in FIG. Explanatory drawing which shows typically an example of the wiring structure of the conventional wire harness. Explanatory drawing which shows the state which attached the ferrite core to the conventional subwire harness. Explanatory drawing which shows the state which attached the shield sheet to the conventional subwire harness.

  BEST MODE FOR CARRYING OUT THE INVENTION The best embodiment to which the wiring harness wiring structure of the present invention is applied will be described below with reference to the drawings.

  FIG. 1 is an explanatory view schematically showing an embodiment of a wiring harness wiring structure according to the present invention, and FIG. 2 is an explanatory view schematically showing a folded portion provided at an arbitrary position of the sub-wire harness according to the present invention. 3 is an enlarged view of a main part of the folded portion shown in FIG.

  In FIG. 1, a wire harness 1 for supplying electric power and signals to various electrical components and the like mounted on the vehicle is wired to the vehicle, and a sub-wire harness is connected to the wire harness 1 via a connector 2. 3 is branched and connected. An LED lamp 5 is connected to one end of the sub-wire harness 3 via another connector 4 and a lead wire 7.

  The sub-wire harness 3 is configured by covering a plurality of insulated wire cores formed by covering a conductor with an insulator with an outer cover.

  The wire length of the sub-wire harness 3 having such a configuration is further extended from the standard length.

  Here, the line length of the extended portion of the sub-wire harness 3 needs to be at least sufficient to form the folded portion.

  Specifically, when the standard length of the sub-wire harness 3 is about 235 mm, the extension portion has a line length of about 825 mm. That is, in this embodiment, as will be described later, since the folded portions are formed at four places, the length is extended about 3.5 times the standard length.

  By extending the wire length of the sub-wire harness 3 in this way from the standard length, the sub-wire harness 3 itself becomes difficult to function as an antenna. That is, the sub-wire harness 3 has a radio frequency (for example, about 144 MHz). Generation of noise can be reduced by the configuration that does not easily resonate.

  Further, as shown in FIG. 2, the extended sub-wire harness 3 is provided with a plurality of folded portions 3a, 3b, 3c, and 3d.

  As shown in FIG. 3, the folded portions 3 a, 3 b, 3 c, and 3 d are folded in a U shape with a bending radius that is about 1 to 2 times the outer diameter of the sub-wire harness 3. Here, the reason why the sub-wire harness 3 is folded back at a bending radius that is about 1 to 2 times the outer diameter is to prevent the conductor constituting the sub-wire harness 3 from being disconnected.

  In this embodiment, the first and third folded portions 3a and 3c are formed in a U-shape, and the second and fourth folded portions 3b and 3d are formed in an inverted U-shape. The extended part of the harness 3 has a meandering shape as a whole.

  By forming the plurality of U-shaped folded portions 3a, 3b, 3c, and 3d in this way, the current flowing through the conductor of the sub-wire harness 3 is reversed in each folded portion 3a, 3b, 3c, and 3d. Therefore, the magnetic field generated by the current is canceled, and as a result, noise is greatly reduced. In addition, by forming the folded portion in a meandering shape in this way, the sub wire harness 3 itself can be formed to be folded in a bellows shape, so that the sub wire harness 3 itself can be made compact and partized. . Furthermore, since the subwire harness 3 that has been made compact and parts can be easily mounted between connectors of other vehicles, versatility can be improved.

  As described above, the wire harness routing structure of the present invention has the following effects.

  First, since the sub-wire harness 3 is provided with a plurality of U-shaped folded portions 3a, 3b, 3c, and 3d, the directions of current in the folded portions 3a, 3b, 3c, and 3d are opposite. Thus, the magnetic field component generated by the current can be canceled out. Therefore, according to the present invention, an electromotive force is generated in a conductor (not shown) of the sub-wire harness 3 due to a high electric field radiated from the antenna of the radio device 6 mounted in the vehicle, and a noise current flows through the conductor. In addition, since the magnetic field component of the noise current can be reduced, the flashing of the LED lamp 5 connected to the sub-wire harness 3 can be prevented.

  In addition, according to the present invention, it is possible to prevent the flashing of the LED lamp 5 by folding back the sub-wire harness 3, so that it is simpler than a sub-wire harness having a conventional ferrite core or shield sheet attached thereto, A low-cost and versatile wire harness wiring structure can be provided.

  Secondly, when the folded portion is formed in a meandering manner by the plurality of folded portions 3a, 3b, 3c, and 3d, the magnetic field component can be canceled more reliably, and as a result, the flashing of the LED lamp 5 can be performed more reliably. Can be prevented.

  Third, when the wire length of the sub-wire harness 3 is set longer than the standard length, the sub-wire harness 3 itself is difficult to function as an antenna, that is, the sub-wire harness 3 is difficult to resonate with a radio frequency. With the configuration, it is possible to reduce the generation of noise.

  The present invention has been described with respect to the present invention with specific embodiments shown in the drawings. However, the present invention is not limited to these embodiments, and as long as the effects of the present invention are exhibited. Any configuration known so far can be employed.

  For example, in the above-described embodiment, the case where the four folded portions 3a, 3b, 3c, and 3d are provided is described. However, the folded portion is provided at any one to three or five or more locations of the sub-wire harness 3. It may be provided.

2, 4 ... Connector 3 ... Sub-wire harness 5 ... LED lamps 3a, 3b, 3c, 3d ... folded portion

Claims (3)

In the wiring structure of the wire harness in which the LED lamp is connected to the sub-wire harness,
A wiring structure of a wire harness, wherein a U-shaped folded portion is provided at an arbitrary position of the sub-wire harness   The wiring structure of the wire harness according to claim 1, wherein the folded portion is formed in a meandering manner by a plurality of folded portions.   The wiring structure of the wire harness according to claim 1 or 2, wherein a line length of the sub-wire harness is set longer than a standard length.

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