JPH08230585A - Door wire harness - Google Patents

Abstract

PURPOSE: To provide a door wire harness permitting use of a circuit conductor having a relatively large thickness by preventing the problem of bending following opening/closing of a door. CONSTITUTION: A door wire harness 16 placed inside an automobile door is constructed by a portion 22a placed penetrating a door hinge side partition wall 24 and having a relatively large twist rigidity, a portion 21a placed inside the door following the portion with the large rigidity and having a relatively small twist rigidity, a portion 22b placed following the small rigidity portion 21a and having a relatively large rigidity and a portion 21b placed following the large rigidity portion 22b and having a relatively small rigidity.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wire harness for an automobile door, which has been improved for the purpose of improving durability against repeated bending of a portion which is bent when the door is opened and closed. The present invention relates to a wire harness for a door, which is composed of a flat conductor and a wire conductor formed in the same.

[0002]

2. Description of the Related Art The structure of a general automobile door is shown in FIG. In FIG. 4, inside the door frame 1, vehicle electrical components (not shown) such as a power window and a solenoid for an automatic door lock are installed. The door trim 2 is a cover plate on the interior side of the automobile door, and automobile electric components (not shown) such as switches are installed therein. A waterproof sheet 3 is installed between the door frame 1 and the door trim 2. The wire harness 4 for a door is formed by bundling and molding a plurality of electric wires into a predetermined shape and size, and is provided with a connector 5 for connecting to each electric component at a predetermined position. A connector 6 to be connected and a waterproof grommet 7 are provided.

As shown in FIG. 5, a door wire harness 4 is arranged so as to be sandwiched between a door frame 1 and a door trim 2, is drawn out of the door through a grommet 7, and is connected to a vehicle body side wire by a connector 6. It is connected to a harness (not shown). Further, the connector 5 provided in each part of the door wire harness 4 is inserted into the work holes 1a and 1b formed in the door frame 1 as necessary, and each automobile electric component (not shown) in the door frame 1 is inserted. ) Is combined with.

FIG. 6 shows another conventional example relating to the arrangement of a wire harness for a door on a door (actual open flat 2-1695).
(See Japanese Patent Publication No. 7). In this conventional example, the main body of the door wire harness is housed inside the door 8, and the end portion 9 of the door wire harness projecting from the hinge portion of the door 8 to the outside is formed into a flat shape and is U-shaped. A slack portion 10 is formed, and a connector 11 for connecting to a vehicle body side wire harness (not shown) is attached. In this conventional example, when the door 8 is repeatedly opened and closed with respect to the vehicle body, bending stress due to repeated bending is mainly applied to the slack portion 10.

The conventional example shown in FIG. 6 will be described below with reference to FIGS. 7 and 8 which are schematic diagrams. FIG. 7A shows a state where the door 8 is closed with respect to the vehicle body 12, and FIG. 7B shows a state where the door 8 is opened with respect to the vehicle body 12. The connector 11 at the tip of the end portion 9 of the door wire harness is connected to the terminal connector 14 of the vehicle body side wire harness 13. In addition, 15 shows a door hinge. FIG. 8 shows only the end portion 9 of the door wire harness. As in the case of FIG. 7, FIG. 8A shows a state in which the door 8 is closed with respect to the vehicle body 12, and FIG. Indicates that the door 8 is opened with respect to the vehicle body 12. As is apparent from FIGS. 7 and 8, when the door 8 is opened and closed, the slack portion 10 of the wire harness for the door arranged near the door hinge 15 connecting the door 8 and the vehicle body 12 is bent. .

[0006]

Although the number of times of opening and closing the door of an automobile is largely different depending on the type of the automobile and the method of use, it is about 3 to 800,000 times, and the door is bent every time the door is opened and closed. The end of the wire harness for the door that receives it must withstand this. The bending of the wire harness due to the opening and closing of the door is as described in FIGS. 7 and 8 above.
Since it is applied to a relatively narrow area around the door hinge, a large mechanical strain is applied to the end of the door wire harness due to bending.

By the way, the magnitude of mechanical strain applied to a bent flat conductor or the like increases as the thickness of the flat conductor or the like increases when the bending radius of the bend is the same. Therefore, when configuring the door wire harness using a flat conductor such as a flat cable,
Since it is necessary to set the bending resistance of the portion near the door hinge that receives bending to a certain level that is equal to or greater than the number of times the vehicle door is opened and closed, a flat conductor having a certain thickness or more cannot be used. For this reason, in order to obtain the necessary current capacity, it is necessary to use a very wide flat conductor, or if there is a dimensional constraint, divide one circuit into multiple circuit conductors. However, there was a problem that they had to be used repeatedly.

According to the present invention, when the door wire harness is constructed of a flat conductor, the problem of bending resistance associated with opening and closing of the door in the above-described conventional wire harness is avoided and a circuit having a relatively large thickness is provided. The purpose is to enable the use of conductors.

[0009]

SUMMARY OF THE INVENTION The present invention provides a wire harness for a door which solves the above-mentioned problems and is a wire harness for a door which is wired inside a door of an automobile, and which penetrates a partition wall on a door hinge side. With a relatively large rigidity, a portion having a relatively large rigidity, a portion having a relatively small torsional rigidity arranged continuously in the door, and a portion having a small torsional rigidity continuously. It is characterized in that it comprises a portion having a relatively large rigidity and a portion having a relatively small rigidity connected to the portion having a relatively large rigidity, if necessary.

[0010]

When the door wire harness having the above-mentioned structure is arranged in the door, the torsional rigidity of the end portion of the door wire harness near the door hinge becomes relatively large. Further, the portion having a relatively small torsional rigidity is arranged in a desired size adapted to the space inside the door. Therefore, the bending of the wire harness due to the opening and closing of the door is induced in a portion where the torsional rigidity is relatively small, and inside the door with a relatively large dimensional margin. As a result,
Since the bending of the wire harness is distributed over a relatively wider area than before, mechanical strain due to bending is reduced, and flat conductors with a relatively large thickness can also be used. Become.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to the embodiments shown in the drawings. FIG. 1 is an explanatory view of a state in which a door wire harness according to the present invention is arranged inside a door.
In FIG. 1, the door wire harness 16 has a circuit formed of a flat conductor and is attached to the door 17. In the wire harness 16 for door, a connector 18 for connecting to automobile electrical equipment is installed at one end, as in the conventional example, and at the other end protruding from the door 17,
A connector 20 for connecting to the grommet 19 and a vehicle body side wire harness (not shown) is attached. In this door wire harness 16, portions 22a and 22b having a relatively large torsional rigidity are provided on the vehicle body side end portions on both sides of a portion 21a having a desired size and a relatively small torsional rigidity. The portions 22a and 22b having a large torsional rigidity are obtained by attaching a thick plastic film to the flat conductor for reinforcement. That is, the door wire harness 16 includes a portion 22a having a relatively large torsional rigidity, which is arranged in a state of penetrating the partition wall 24 on the door hinge side, and a relative portion arranged in the door continuously to the portion 22a having a large rigidity. 21a with low torsional rigidity
A portion 22b having a relatively large torsional rigidity and a portion 22b having a relatively large rigidity continuously connected to the portion 21a having a small rigidity.
It is composed of a portion 21b which is continuous with b and has a relatively small torsional rigidity. The portion 22a having large torsional rigidity penetrates the through hole of the partition wall 24 so as to be freely movable.

The function of the above-mentioned door wire harness 16 will be described with reference to FIGS. 2 (a) and 3
2A shows a state in which the door 17 is closed with respect to the vehicle body 23, and FIGS. 2B and 3B show a state in which the door 17 is opened with respect to the vehicle body 23. Note that FIG. 3 shows the movement of the door wire harness 16 only when the door 17 is opened and closed.

2 (a) and 2 (b), portions 22a and 22b to which a thick plastic film or the like is attached and which has a relatively large torsional rigidity as compared with the surrounding portions.
Does not bend even when the door 17 is opened and closed, and the bending due to the opening and closing of the door 17 has a relatively small torsional rigidity.
It happens in a. That is, the bending accompanying the opening and closing of the door 17
It does not occur in a relatively narrow portion near a door hinge (not shown) that connects the door 17 and the vehicle body 23, but occurs in a portion 21a having relatively small torsional rigidity arranged inside the door 17 with a dimensional allowance. Be guided to.

As is well known, the mechanical strain becomes smaller as the bending radius becomes larger, when the materials to be bent have the same thickness. Unlike the vicinity of the door hinge, which has a small dimensional margin, the portion 21a having a relatively small torsional rigidity is located in a portion having a relatively large dimensional margin inside the door. Therefore, the size of the bending radius of the bending due to opening and closing of the door can be easily increased by adjusting the size and shape of the portion 21a having small torsional rigidity and the relative position of the door hinge and the portion 21a having small torsional rigidity. . For this reason, it is possible to provide the portion 21a having a small torsional rigidity with bending resistance with a sufficient margin for the number of times of opening and closing the door of the automobile.

The portions 22a, 2 having relatively large rigidity
2b may be configured by applying any means to a substrate such as a flat cable as long as the rigidity is higher than that of the peripheral portion. For example, fixing a thin plate or rod of reinforcing material along a substrate such as a flat cable, covering the relevant part with a sheath-like reinforcing member, or sticking a thin plate or film of the reinforcing material to the relevant part. You may comprise. Further, the rigidity of the portions 22a and 22b having high rigidity does not need to completely prevent bending at the portions when the door is opened and closed, and the bending at the time of opening and closing the door is limited to the narrow portion around the door hinge. It is prevented from concentrating on the substrate such as a flat cable, and the bending is distributed to the portion 21 having a relatively small torsional rigidity, and as a result, there is a sufficient margin for the number of times of opening and closing the door of the automobile. It suffices if flexibility can be imparted to a substrate such as a flat cable forming a wire harness for a door.

[0016]

As described above, according to the present invention, there is provided a door wire harness that is wired inside a door of an automobile, and has a relatively high rigidity, which is arranged in a state of penetrating a partition wall on the door hinge side. A portion having a relatively small torsional rigidity arranged continuously in the door to the portion having a large rigidity, a portion having a relatively large rigidity continuous to the portion having a small torsional rigidity, As it consists of a large part and a part with relatively low rigidity, if necessary,
Since a substrate such as a flat cable having a relatively large thickness with poor bending resistance can be used, the circuit width for obtaining the necessary current capacity can be reduced, and one circuit can be made into multiple thin sheets. There is no need to take a measure of dividing and overlapping the circuit conductors, and there is an excellent effect that the configuration can be simplified.

[Brief description of drawings]

FIG. 1 is an explanatory view showing a state in which an embodiment of a door wire harness according to the present invention is arranged inside a door.

2A and 2B are partial explanatory views of a state in which the door in FIG. 1 is closed to the vehicle body and a state in which the door is opened to the vehicle body, respectively.

3A and 3B are explanatory views showing the movement of the door wire harness in FIGS. 2A and 2B, respectively.

FIG. 4 is an exploded perspective view of a conventional door portion.

FIG. 5 is a perspective view of a conventional door portion.

FIG. 6 is an explanatory view of the movement of the door wire harness in the conventional door portion.

7A and 7B are partial explanatory views of a state in which the door in FIG. 6 is closed with respect to the vehicle body and a state in which the door is opened with respect to the vehicle body, respectively.

8A and 8B are explanatory views showing the movement of the door wire harness in FIGS. 7A and 7B, respectively.

[Explanation of symbols]

 16 Wire harness for door 17 Door 18, 20 Connector 19 Grommet 21a, 21b Low torsional rigidity portion 22a, 22b High rigidity portion 23 Body 24 Partition wall

Claims (1)

[Claims] 1. A wire harness for a door, which is wired inside a door of an automobile, wherein a relatively high rigidity portion arranged in a state of penetrating a partition wall on a door hinge side and a portion having a relatively high rigidity are continuous. Located in the door with relatively small torsional rigidity, a portion with relatively small torsional rigidity and relatively large rigidity, and a portion with relatively large rigidity continuously with respect to the large rigidity as necessary. A wire harness for doors, which consists of a part with low rigidity.