Door harness

Abstract

To provide a door harness which enables improvement of workability of assembly work.SOLUTION: A door harness 1 includes: a flat type arrangement material 10 which has a flexibility and is arranged spanning a roof panel 111 forming a body 110 of a vehicle 100 and a door panel 121 of a back door 120; electronic components 20 mounted on the flat type arrangement material 10 and forming an ECU 2 of the vehicle 100; and a grommet 30 into which the flat type arrangement material 10 is inserted and which covers a periphery of the electronic components 20.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to a door harness. [Background technology]

[0002] As a conventional technology relating to door harnesses, for example, Patent Document 1 discloses a door harness that includes a flexible flat wiring material that is routed across the vehicle body and door panel, and a grommet through which the flat wiring material is inserted. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2002-325341 Summary of the Invention [Problem to be solved by the invention]

[0004] Incidentally, in the door harness described in the above-mentioned Patent Document 1, for example, each device mounted on the vehicle may be electrically connected to the ECU via a flat wiring material. In this case, however, since the installation position of the ECU differs depending on the vehicle in which it is mounted, there is a risk that the workability of the assembly work may be deteriorated.

[0005] The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a door harness that can improve the workability of assembly work. [Means for solving the problem]

[0006] In order to achieve the above object, the door harness of the present invention comprises a flexible flat wiring material that is wired across the vehicle body and door panel, electronic components that are mounted on the flat wiring material and constitute the vehicle's ECU, and a grommet through which the flat wiring material is inserted and that covers the periphery of the electronic components. [Effects of the Invention]

[0007] In the door harness according to the present invention, electronic components constituting the vehicle's ECU are mounted on the flat wiring material, and the electronic components are surrounded by a grommet. With this configuration, the door harness can integrate the flat wiring material with the ECU, and the grommet functions as a casing that protects the electronic components constituting the ECU, thereby easily forming the ECU on the flat wiring material. As a result, the door harness has the effect of improving the workability of assembly work. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 1 is an exemplary perspective view of a vehicle to which a door harness according to an embodiment is applied, showing a state in which the back door is in a closed position. [Figure 2] FIG. 2 is an exemplary perspective view of a vehicle to which the door harness according to the embodiment is applied, showing a state in which the back door is in an open position. [Figure 3] FIG. 3 is an exemplary cross-sectional view of a door harness according to the embodiment. [Figure 4] FIG. 4 is an exemplary perspective view of a door harness according to the embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0009] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. Note that the present invention is not limited to the following embodiments. Furthermore, the components in the following embodiments include those that are easily replaceable by those skilled in the art, or those that are substantially identical. Note that in this specification, ordinal numbers are used only to distinguish between parts, members, portions, positions, directions, etc., and do not indicate order or priority.

[0010] [Embodiment] FIG. 1 is a perspective view of a vehicle 100 to which a door harness 1 according to an embodiment is applied, showing a state in which a tailgate 120 is in a closed position P1, and FIG. 2 is a view showing a state in which the tailgate 120 is in an open position P2. The door harness 1 according to the embodiment shown in FIGS. 1 and 2 is applied to a vehicle 100 such as an automobile, and is used to connect devices mounted on the vehicle 100 for power supply and signal communication. The door harness 1 according to the embodiment is provided, for example, in a tailgate 120 of the vehicle 100, and is routed across a roof panel 111 and a door panel 121 of a body 110. The tailgate 120 is a door of a luggage compartment provided at the rear of the vehicle 100, and is configured to be openable and closable with respect to the body 110 of the vehicle 100 between a closed position P1 (see FIG. 1) and an open position P2 (see FIG. 2).

[0011] In the following description, of the first, second, and third directions that intersect with one another, the first direction will be referred to as the "vehicle longitudinal direction X," the second direction will be referred to as the "vehicle width direction Y," and the third direction will be referred to as the "vehicle height direction Z." Here, the vehicle longitudinal direction X, the vehicle width direction Y, and the vehicle height direction Z are approximately perpendicular to one another. The vehicle longitudinal direction X typically corresponds to the overall length direction of the vehicle 100, the longitudinal direction of the door harness 1, etc. The vehicle width direction Y typically corresponds to the overall width direction of the vehicle 100, the width direction of the door harness 1, etc. The vehicle height direction Z typically corresponds to the vehicle height direction of the vehicle 100, the plate thickness direction (height direction) of the door harness 1, etc. Unless otherwise specified, the directions used in the following description will be described as directions in a state in which the door harness 1 is assembled to the vehicle 100.

[0012] FIG. 3 is a cross-sectional view of the door harness 1, and FIG. 4 is a perspective view of the door harness 1. As shown in FIGS. 3 and 4, the door harness 1 of this embodiment includes, for example, a flat wiring material 10, a plurality of electronic components 20 constituting an ECU 2, and a grommet 30. The flat wiring material 10 is a wiring material constituting the door harness 1, and is formed, for example, from an FPC (Flexible Printed Circuits) or an FFC (Flexible Flat Cable). The flat wiring material 10 is a thin, flexible, flat wiring material. The flat wiring material 10 is formed, as a whole, in the shape of a rectangular plate extending laterally along the vehicle longitudinal direction X. The flat wiring material 10 includes, for example, a base film, a wiring pattern, and a cover lay.

[0013] The base film is a substrate that has excellent flexibility and determines the overall shape of the flat wiring material 10. The base film is formed, for example, from a polyimide resin that has excellent heat resistance. The wiring pattern is laminated on the surface (mounting surface) of the base film and constitutes multiple conductor circuit portions (pattern layers). The wiring pattern is formed, for example, from a conductive material such as copper foil and printed on the surface of the base film as a printed circuit body. The coverlay is laminated over the entire surface of the base film via an adhesive (not shown) and functions as a protective layer that protects the conductor circuit portions of the wiring pattern, etc.

[0014] The flat wiring material 10 is also configured to include, for example, a connector 40. Here, the flat wiring material 10 is provided with a first connector 41 at one end in the vehicle longitudinal direction X, and a second connector 42 at the other end in the vehicle longitudinal direction X. The first connector 41 is connected to, for example, a door-side device mounted in a back door 120 via a separate harness, and the second connector 42 is connected to, for example, a body-side device mounted in a body 110 via a separate harness.

[0015] Furthermore, the first connector 41 and the second connector 42 are electrically connected to the wiring pattern of the flat wiring material 10 and to a plurality of electronic components 20 constituting the ECU 2 described below. The plurality of conductor circuit portions formed by the wiring pattern can function as any of circuits such as a signal circuit, a signal GND circuit, or a power earth circuit. The signal circuit is, for example, a circuit that transmits communication signals between the ECU 2 and on-board devices such as various electronic devices in the vehicle 100. The signal GND circuit is a circuit associated with the signal circuit that provides electrical continuity between the on-board devices and adjusts the potential that serves as the reference for circuit operation between the on-board devices. The power earth circuit is a circuit that grounds the power supply system of the on-board devices.

[0016] The plurality of electronic components 20 are mounted on the flat wiring material 10 and constitute the ECU 2 of the vehicle 100. Here, the plurality of electronic components 20 are provided at intervals from each other on the surface of the flat wiring material 10, i.e., on the surface opposite to the door panel 121 in the vehicle height direction Z. The plurality of electronic components 20 are configured to include, for example, chips such as a CPU (Central Processing Unit), sensors, etc. The ECU 2 controls, for example, a door-side device mounted in the back door 120 and a body-side device mounted in the body 110. In this way, in this embodiment, the ECU 2 and the flat wiring material 10 are integrated by directly mounting the electronic components 20 on the flat wiring material 10.

[0017] The grommet 30 has the flat wiring material 10 inserted therethrough to cover the periphery of the electronic component 20. The grommet 30 includes, for example, a non-bending portion 31, a first insertion portion 32, and a second insertion portion 33. The non-bending portion 31 is a portion of the grommet 30 that is routed along the surface of the door panel 121. In this embodiment, a plurality of electronic components 20 are disposed inside the non-bending portion 31. That is, the plurality of electronic components 20 are configured to be unable to bend following the first insertion portion 32, the second insertion portion 33, etc. of the grommet 30. The non-bending portion 31 is fixed to the surface of the door panel 121 via an adhesive layer 50 such as an adhesive or double-sided tape. The length of the non-bending portion 31 along the vehicle longitudinal direction X is formed to be substantially equal to the length of the adhesive layer 50 along the vehicle longitudinal direction X.

[0018] The first insertion portion 32 is provided at one end of the non-bent portion 31 of the grommet 30 and is a portion that is inserted into a gap 123 between the door panel 121 and an interior material 122 that covers the surface of the door panel 121. The first insertion portion 32 is inserted into the gap 123 in a state that the first insertion portion 32 is bent with respect to the non-bent portion 31 so as to follow an inclined portion provided on the surface of the door panel 121, for example. The first connector 41 described above is exposed at one end of the first insertion portion 32 in the vehicle longitudinal direction X. The first connector 41 is connected to a door-side device mounted in the back door 120 in the internal space of the interior material 122 via a separate harness. As described above, in this embodiment, inserting the first insertion portion 32 of the grommet 30 into the gap 123 of the interior material 122 eliminates the need for an operation of passing the grommet 30 through the door panel 121 in the vehicle height direction Z (the plate thickness direction of the door panel 121).

[0019] The second insertion portion 33 is provided at the other end of the non-bending portion 31 of the grommet 30, and is inserted into a through-hole 112 formed in a roof panel 111 of the body 110 while being bent relative to the non-bending portion 31. The second insertion portion 33 is formed, for example, in a bellows shape that is bendable along the vehicle height direction Z (the plate thickness direction of the flat wiring material 10). The second insertion portion 33 is inserted into the through-hole 112 while being folded back in a U-shape from the surface of the door panel 121 to the surface of the roof panel 111. The above-mentioned second connector 42 is exposed at the other end of the second insertion portion 33 in the vehicle fore-and-aft direction X. The second connector 42 is connected to a body-side device mounted in the body 110 in the interior space of the roof panel 111 via a separate harness. In this manner, in this embodiment, the second insertion portion 33 of the grommet 30 is bent and inserted into the through hole 112 of the roof panel 111, thereby enabling the door harness 1 to follow the movement of the tailgate 120 between the closed position P1 and the open position P2.

[0020] As described above, the door harness 1 of this embodiment is configured to include the flat wiring material 10. Therefore, the door harness 1 configured with the flat wiring material 10 is lighter than a general wire harness in which various electric wires are bundled. Here, when the door harness 1 described above is installed in a vehicle 100, if the wire harness is configured entirely of electric wires, there is a risk that the overall weight will increase. In this regard, according to this embodiment, since the door harness 1 is configured to include the flat wiring material 10, it is possible to accommodate an increase in the size of the door harness 1 while suppressing an increase in the overall weight.

[0021] Furthermore, the door harness 1, which is made up of various types of wires bundled together, is generally manufactured manually by a worker. In contrast, the flat wiring material 10 can be manufactured automatically, and therefore, by constructing the door harness 1 from the flat wiring material 10, the number of steps required to manufacture the door harness 1 can be reduced. Furthermore, a large door harness 1, which is made up of various types of wires bundled together, is generally difficult to transport due to its weight. In contrast, according to this embodiment, the flat wiring material 10 has the advantage of shortening the number of days required to manufacture the door harness 1 itself or the vehicle 100 that uses the door harness 1, and making it less likely that the manufacturing location will be limited.

[0022] In addition, in this embodiment, the connector 40 of the flat wiring material 10 allows attachment and detachment of separate harnesses on the door-side device side and the body-side device side. Therefore, in the final process of manufacturing the door harness 1, the worker simply connects a previously prepared separate harness to the flat wiring material 10. For example, the worker first attaches the flat wiring material 10, before the separate harness is connected, across the roof panel 111 and the door panel 121 of the body 110, and then connects each separate harness to the flat wiring material 10, thereby assembling the entire door harness 1.

[0023] In addition, in this embodiment, the flat wiring material 10 is flexible, so the door harness 1 can be easily adapted to various mounting portions within the vehicle 100. In addition, in this embodiment, one or more connectors 40 are installed at each end of the flat wiring material 10 in the vehicle longitudinal direction X, so that the flat wiring material 10 can connect multiple separate harnesses from opposite sides to each other. Therefore, the work of connecting separate harnesses can be performed more easily.

[0024] As described above, the door harness 1 of this embodiment includes the flat wiring material 10, which is flexible and is routed across the body 110 and door panel 121 of the vehicle 100; the electronic components 20 mounted on the flat wiring material 10 and constituting the ECU 2 of the vehicle 100; and the grommet 30 through which the flat wiring material 10 is inserted and which covers the periphery of the electronic components 20. With this configuration, the door harness 1 can integrate the flat wiring material 10 and the ECU 2, for example, and the grommet 30 functions as a casing that protects the electronic components 20 constituting the ECU 2, thereby easily forming the ECU 2 on the flat wiring material 10. As a result, the door harness 1 can improve the workability of the assembly work.

[0025] Furthermore, in the door harness 1 of this embodiment, the grommet 30 has a non-bending portion 31 that is routed along the surface of the door panel 121, and the electronic component 20 is disposed inside the non-bending portion 31. With this configuration, the door harness 1 can, for example, more appropriately dispose the electronic component 20 that constitutes the ECU 2 inside the grommet 30 due to the non-bending portion 31, and thus can more reliably protect the electronic component 20 (ECU 2).

[0026] Moreover, in the door harness 1 of this embodiment, the grommet 30 is provided at one end of the non-bending portion 31 and has a first insertion portion 32 that is inserted into a gap 123 between the door panel 121 and an interior material 122 that covers the surface of the door panel 121. With this configuration, for example, the door harness 1 can eliminate the need for the work of passing the door harness 1 through the door panel 121 by the first insertion portion 32 being inserted into the gap 123, thereby further simplifying the installation work of the door harness 1.

[0027] In the door harness 1 of this embodiment, the grommet 30 has a second insertion portion 33 that is provided at the other end of the non-bending portion 31 and is inserted into the through-hole 112 of the body 110 in a state where it is bent relative to the non-bending portion 31. With this configuration, the door harness 1 can be routed across the body 110 and the door panel 121 while allowing the back door 120 to move between the closed position P1 and the open position P2 by the second insertion portion 33, for example.

[0028] In this embodiment, an example is given in which the flat wiring material 10 is wired across the body 110 of the vehicle 100 and the door panel 121 of the tailgate 120, but this example is not limited to this, and for example, the flat wiring material 10 may be wired across the body 110 and the door panel of a door other than the tailgate 120 (such as a side door).

[0029] While the embodiments of the present invention have been described above, they are merely examples and are not intended to limit the scope of the invention. The above embodiments can be implemented in various other forms, and various omissions, substitutions, combinations, and modifications can be made without departing from the spirit of the invention. Furthermore, the specifications of each configuration, shape, and the like (structure, type, direction, format, size, length, width, thickness, height, number, arrangement, position, material, etc.) can be modified as appropriate. [Explanation of symbols]

[0030] 1 door harness 2 ECU 10 Flat wiring material 20 Electronic Components 30 Grommets 31 Non-bending part 32 First insertion part 33 Second insertion part 100 vehicles 110 Body 111 Roof Panel 112 Through hole 120 Backdoor 121 Door Panel 122 Interior materials 123 Gap

Claims

1. A flexible flat wiring material that is wired across the vehicle body and door panel; An electronic component mounted on the flat wiring material and constituting an ECU of the vehicle; a grommet through which the flat wiring material is inserted and which covers the periphery of the electronic component; Door harness with.

2. The grommet has a non-bent portion that is routed along the surface of the door panel, and the electronic component is disposed inside the non-bent portion. The door harness according to claim 1 .

3. The grommet has a first insertion portion provided at one end of the non-bent portion and inserted into a gap between the door panel and an interior material covering the surface of the door panel. The door harness according to claim 2 .

4. The grommet has a second insertion portion provided at the other end of the non-bending portion and inserted into the through hole of the body in a state where the second insertion portion is bent relative to the non-bending portion. The door harness according to claim 2 or 3.

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