JP5803826B2 - Wire harness - Google Patents

Description

  The present invention relates to a wire harness, and more specifically, a wire harness routed according to a vehicle grade is configured by adding a harness corresponding to a middle grade vehicle and a high grade vehicle to a base harness corresponding to a low grade vehicle. The present invention relates to a so-called add-on type wire harness.

As for automobiles, the number of electrical components to be installed will increase gradually due to the difference between low-grade, middle-grade and high-grade cars . In other words, low-grade vehicles are not equipped with optional equipment, and there are few electrical components installed, middle-grade vehicles are equipped with optional equipment, more electrical components are installed than low-grade vehicles, high-grade vehicles are middle-grade The optional equipment that is not installed in the car will be installed, and more electrical components will be installed than in the middle-grade cars, and the equipment installed by grade will be different.
As described above, when the number of electrical components to be mounted for each grade increases, the number of electric wires connected to these electrical components also increases, and therefore the types of wire harnesses that are formed by converging these electric wires increase.
From the viewpoint of improving the production of wire harnesses, the present applicant provides an add-on type wire harness manufacturing method in Japanese Patent Application Laid-Open No. 2004-355941 (Patent Document 1).

In the method of manufacturing the wire harness of Patent Document 1, a base circuit shared by all models and an add-on circuit that is different in low grade, middle grade, and high grade are selected,
The base harness that constitutes the base circuit and the add-on harness that constitutes the add-on circuit are assembled on a separate workbench, and then the add-on harness is stacked and bundled at the required position of the base harness to produce a wire harness for middle grade vehicles The company manufactures wire harnesses for high-grade vehicles.
Specifically, as shown in FIGS. 9A and 9B, the base harness 100 and the add-on harnesses 110 and 120 are overlapped with the upstream side of the power supply connected to one junction box 130 by tape winding or the like. They are united.

  In the add-on type wire harness manufacturing method of Patent Document 1, since the base harness is used in common for all vehicle types, large-lot production is possible, and it is only necessary to prepare an add-on harness for each vehicle type. There is an advantage that can be reduced.

  However, in the add-on type wire harness manufacturing method of Patent Document 1, as shown in FIGS. 9A and 9B, the wires of the base harness and the add-on harness are not connected to each other via a connector. Therefore, when circuit connection is required, it is necessary to perform the connection inside the junction box 130 via a bus bar or the like, and it is necessary to extend the electric wire that requires circuit connection to the junction box. Therefore, there is a problem that the length of the electric wire becomes large and the amount of electric wire increases.

  To solve the above problem, add-on harness wires that need to be connected to the base harness wires are branched when the wires to be connected from the base harness and the add-on harness are branched, and the branched wires are connected by wire-to-wire via connectors. The amount of wires in the harness can be reduced. However, when the amount of electric wires that need to be connected increases, the size of the connector increases, and the connector exceeds the width of the main line of the base harness, causing a problem of interference with peripheral devices.

  In addition, when using a laminated connector in which wire-to-wire connectors are laminated, it is possible to reduce the connector width, but the laminated connector can be used only during the manufacturing process of the wire harness, and an add-on harness is assembled later. It cannot be found and connected to the base harness.

Japanese Patent Laid-Open No. 2004-355941

  As mentioned above, in the add-on type wire harness, when connecting the wires of the base harness and the add-on harness to each other, there is a problem that the connector becomes large, and it is easy to connect the add-on harness to the base harness later. There is a problem that cannot be done.

  The present invention is intended to solve the above problem, and among the power circuit, ground circuit, and signal circuit of the base harness, the electric wire of the circuit that can be shared with the add-on harness is branched from the base harness, and the connector of the add-on harness and the connector are connected. In the add-on type wire harness, the problem is to be able to connect the base harness and the add-on harness with a small connector and to connect them not only in the wire harness manufacturing process but retrofitting.

In order to solve the above-mentioned problem, the present invention divides a wire harness routed in a vehicle into a base harness shared by all vehicle types and an add-on harness that differs depending on the vehicle type,
The electric wire connected to the add-on harness is branched from the base harness and a connector is connected to the branched electric wire terminal, and the connector is a card edge connector into which a wiring board connected to the circuit on the add-on harness side is inserted. The wire harness characterized by this is provided.

The base harness that is commonly used for all types of low-grade, middle-grade, and high-grade vehicles is equivalent to the wiring harness that is normally routed to low-grade vehicles. Accordingly, the add-on harness increases.
In the present invention, a wire harness mounted on a middle grade vehicle or a high grade vehicle uses a base harness, an add-on harness is connected to a branch line of the base harness, and the connector is used as the card edge connector to reduce the connector width. In order to reduce the size of the base harness, the base harness is prevented from projecting from the main line while being mounted on the outer peripheral surface of the main line so that it does not interfere with surrounding external interference materials.

While branching the wires connected to the add-on harness dispersed at a plurality of positions of the trunk line of the base harness,
Among the circuits of the add-on harness, the power circuit, the ground circuit, and the signal circuit that can be shared with the base harness are branched from the base harness by branching from the main line of the add-on harness and the power circuit, the ground circuit, and the signal circuit. Electrically connected via the card edge connector,
The terminal of the trunk line of the add-on harness is connected to optional equipment mounted by grade , and is preferably bound to the base harness at a position close to these equipment.
That is, a low-grade car not equipped with optional equipment, a middle-grade car equipped with optional equipment not installed in the low-grade car, a high-grade car equipped with optional equipment not installed in the middle-grade car, The equipment to be installed differs depending on the grade, the terminal of the main line of the add-on harness is connected to each installed optional equipment, and the add-on harness is bound to the base harness at a position close to each optional equipment .

  By setting it as this structure, the position which connects an add-on harness with a base harness can be positioned with the said card edge connector. In addition, the base harness can be used effectively, and the connection position between the base harness and the add-on harness can be optimized. As a result, the lengths of the base harness and the add-on harness can be shortened.

As described above, it is preferable that the wires of the base harness connected to the add-on harness are distributed and branched at a plurality of positions.
That is, when the connector connection between the base harness and the add-on harness is performed at one place, an electric wire to be bypassed is generated in both the base harness and the add-on harness, the amount of electric wires is increased, and the number of electric wires to be connected is increased. Edge connector becomes larger. Therefore, branching is performed at a position where both the base harness and the add-on harness to be connected to each other are shortened, such as a position where the length of the add-on harness connected to the optional device is shortened, and the branch positions are distributed to a plurality of locations. Yes. As a result, the card edge connector can be miniaturized.

  A terminal fitting connected to an electric wire terminal branched from the base harness is inserted and locked to the card edge connector from one end side, and a circuit terminal provided on the wiring board inserted from an opposite insertion port is brought into contact with the terminal fitting. The base harness and add-on harness circuits are electrically connected to each other.

The wiring board on the add-on harness side to be inserted into the card edge connector is provided with a conductor connected to each electric wire on the add-on harness side on the board, and a terminal fitting connected to the electric wire terminal of the base harness is brought into contact with each conductor. Connect the wire of the add-on harness with wire-to-wire, and
A conductor serving as a joint portion for conducting the conductors such as a ground circuit and a signal circuit, which can be a common circuit, is provided.

  The circuit on the add-on harness side provided with the wiring board to be inserted into the card edge connector is composed of a branch electric wire branched from the trunk line of the add-on harness, and the conductor provided with each branch electric wire terminal on the wiring board; Electrical connection.

  Alternatively, the circuit on the add-on harness side provided with the wiring board to be inserted into the card edge connector is a relay harness constituted by an electric wire or a flexible printed circuit (FPC), and the electric wire or FPC of the relay harness Both ends are connected to the conductor of the wiring board, and the wiring board on one end side is inserted into the card edge connector connected to the branch wire of the base harness and connected to the base harness, while the wiring board on the other end side is the add-on It is assumed that it is connected to a card edge connector connected to a wire terminal branched from the harness.

  The conductor of the wiring board to be inserted into the card edge connector and the base harness and / or the wire of the add-on harness are connected by soldering the exposed core wire to the end of the wire or by connecting the terminal to the end of the wire. Is in contact with the conductor.

As described above, in the wire harness configured by assembling the add-on harness to the base harness of the present invention, among the electric wires of the base harness, the electric wire of the circuit connected to the add-on harness is branched, and the card edge connector is connected to these branch wires. Are connected and electrically connected to the wires of the add-on harness via the card edge connector.
Thus, middle grade vehicles equipped with optional devices, for high-grade vehicles wiring harness is only as good by adding an add-on harness necessary optional device that utilizes base harness is mounted, can be reduced wire amount . And since the card edge connector is attached to the branch line of the base harness, an add-on harness can be connected later.
And since a card edge connector is used, a connector can be reduced in size and the interference problem with a peripheral device can be avoided in the state attached to the outer surface of a base harness.

It is a top view which shows the wire harness which consists of a base harness of embodiment of this invention. It is a top view which shows the wire harness which combines and forms the 1st add-on harness of this invention with a base harness. It is a top view which shows the wire harness which combines and forms the 2nd add-on harness of this invention with a base harness and a 1st add-on harness. The card edge connector attached to a base harness is shown, (A) is a perspective view which shows the state which mounted the card edge connector in the outer surface of a base harness, (B) is a cross section which shows the state which inserted the terminal of the electric wire terminal into the card edge connector FIG. 4C is a cross-sectional view showing a state where a wiring board connected to the terminal is inserted into the card edge connector. (A) is a perspective view which shows a relay harness, (B) is a top view which shows the modification of the wiring board connected to the terminal of a relay harness. It is a perspective view which shows the relationship between the relay harness connected to a base harness, and an add-on harness. It is a perspective view which shows the state which connected the add-on harness via the relay harness to the base harness. (A) and (B) are perspective views showing a second embodiment. (A) (B) is drawing which shows a prior art example.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1st Embodiment is shown in FIG. 1 thru | or FIG.

1st Embodiment is a wire harness which consists of an instrument panel harness routed to a motor vehicle. The wire harness can be used for low-grade vehicles that are not equipped with optional devices , middle-grade vehicles that are equipped with optional devices, and high-grade vehicles that are equipped with optional devices that are not equipped with middle-grade vehicles. Corresponding wire harnesses 1A, 1B, 1C are assembled. That is, the optional equipment to be installed is different between middle-grade vehicles and high-grade vehicles classified by grade .

  A wire harness 1A shown in FIG. 1 is a wire harness including only a base harness 2 mounted on a low-grade vehicle. A wire harness 1B shown in FIG. 2 is configured by adding a plurality of first add-on harnesses 3 (3A, 3B) to a wire harness 1A composed of a base harness 2 and combining them. The wire harness 1C shown in FIG. 3 is configured by adding a plurality of second add-on harnesses 4 (4A, 4B, 4C) to the wire harness 1B and combining them.

  As shown in FIG. 1, the upstream end of the base harness 2 is connected to the junction box 5 via the connector C, and the wires of the base harness 2 are electrically connected to the power supply circuit, ground circuit, and signal circuit at the junction box 5. ing. The downstream terminal of the base harness 2 is connected to the electrical equipment via a fuse, a relay, a connector C, or the like.

  Among the electric wire groups constituting the base harness 2, the electric wires 11 that need to be connected to the electric wire group of the first add-on harness 3 of the middle-grade vehicle and the electric wire group of the second add-on harness 4 of the high-grade vehicle are connected in advance. The electric wires are branched from the main line 10 of the base harness 2 at a plurality of positions at an optimum position where the electric wires are short. The branching electric wire 11 includes an electric wire of an earth circuit, a power supply circuit and / or a signal circuit used in the wire harness 1B of the middle grade vehicle and the wire harness 1C of the high grade vehicle.

The branch positions P provided in a distributed manner on the main line 10 of the base harness 2 are connected to the branch position P1 connected to the first add-on harness 3A, the branch position P2 connected to the second add-on harness 4A, and the first add-on harness 3B. It consists of a branch position P3 and branch positions P4 and P5 connected to the second add-on harnesses 4B and 4C.
In addition, in the same manner as a well-known wire harness, branch wires 8 different from those for connection to the first and second add-on harnesses are branched into the base harness 2 at a plurality of locations, and connectors C are connected to the terminals of these branch wires 8. doing.

  As shown in FIGS. 2 and 3, the first and second add-on harnesses 3 and 4 connected to the base harness 2 both branch the electric wires 15 and 16 connected to the base harness 2 from the main lines 13 and 14. , 14 both ends are connected via fuses, relays, connectors, or the like, or directly to optional electrical equipment.

  At each branch position P (P1 to P5) of the base harness 2, as shown in FIG. 4, a card edge connector 20 connected to the end of the branched electric wire 11 is attached, and an adhesive tape 18 is attached to the outer peripheral surface of the main line 10. It is fixed in advance.

  In the card edge connector 20, a terminal 23 connected to the terminal of the electric wire 11 of the base harness 2 is inserted and locked from a terminal insertion port 22 on one end side of a flat box-shaped housing 21. The wiring board 26 (26A, 26B) provided with an insertion port 24 on the opposite side and connected to one terminal of the relay harness 25 (25A, 25B) connected to the electric wire 15 or 16 of the first add-on harness 3 or the second add-on harness 4 ) Can be inserted through the insertion port 24.

  As shown in FIG. 5, similar wiring boards 27 (27A, 27B) are connected to other terminals of the relay harness 25 (25A, 25B). Further, the card edge connector 30 (30A, 30B) is connected to the electric wire 15 or 16 of the first add-on harness 3 or the second add-on harness 4 shown in FIG. 6, and the insertion port 31 (31A, 31B) of the card edge connector 30 is connected. The wiring board 27 (27A, 27B) of the relay harness 25 can be inserted into the relay harness 25. Terminals connected to the ends of the electric wires 15 and 16 are inserted and locked into the card edge connector 30, and the card edge connector 30 has the same configuration as the card edge connector 20 attached to the base harness 2.

  The wiring boards 26 and 27 connected to both ends of the relay harness 25 have the same configuration. As shown in FIG. 5, the conductors 26a and 27a connected to the electric wire group 34 constituting the relay harness 25 are respectively connected to the insulating boards 26b and 27b. Is printed. The conductors 26a and 27a are electrically connected to one end side of the conductors 26a and 27a by a method such as soldering or ultrasonic welding by peeling off the insulation coating at the end of the wire 34 of the relay harness and exposing it. When the wiring boards 26 and 27 are inserted into the card edge connectors 20 and 30, the wires 11 of the base harness 2 and the wires 15 and 16 of the first and second add-on harnesses 3 and 4 are connected to the other ends of the conductors 26a and 27a. The terminal of the female terminal connected to the terminal is pressed and electrically connected, whereby the electric wire of the base harness 2 and the electric wire of the first add-on harness 3 or the second add-on harness 4 are electrically connected.

  In the wiring boards 26 and 27, as shown in FIG. 5B, when conducting a plurality of circuits such as a ground circuit and a common signal circuit, a joint circuit in which conductors 26a connected to the one electric wire 34 are connected to each other. 36 is provided.

As described above, the base harness 2 is provided, the branch lines 11 for connecting the add-on harnesses are branched to the five branch positions P (P1 to P5) where the trunk line 10 of the base harness 2 is dispersed, 20 is connected, and the terminal 23 crimped to the end of the branch line 11 is inserted and locked.
The card edge connector 20 is placed on the outer peripheral surface of the trunk line 10 and fixed with an adhesive tape 18. In the wire harness manufacturing process, when the first and second add-on harnesses 3 and 4 are combined with the base harness 2, the card edge connector is connected to the first and second add-on harnesses 3 and 4 via the relay harness 25. 20 may be taped and fixed to the outer peripheral surface of the main line 10. However, even when the card edge connector 20 is wound and fixed to the outer peripheral surface of the main line 10 with the adhesive tape 18, the wiring board of the relay harness can be inserted into the card edge connector 20, so that the card edge connector 20 is fixed in advance with tape. It is preferable.

  On the other hand, the first and second add-on harnesses 3 (3A, 3B) and 4 (4A to 4C) are assembled, and the electric wires 15 and 16 that need to be connected to the base harness 2 are branched from the main lines 13 and 14, and the card edge The connectors 30A and 30B are connected.

  The middle-grade vehicle wire harness 1B shown in FIG. 2 connects the electric wire 11 branched at the branch positions P1 and P3 of the base harness 2 to the branched electric wire 15 of the first add-on harnesses 3A and 3B via the relay harness 25, respectively. Let me assemble.

Specifically, the wiring board 27A at one end of the relay harness 25A is inserted into the card edge connector 30A connected to the branch lines of the first add-on harnesses 3A and 3B, and the wires of the relay harness 25A and the first add-on harnesses 3A and 3B are inserted. And keep conducting.
Next, the first add-on harnesses 3A and 3B are overlapped at different positions on the main line 10 of the base harness 2, and the wiring board 26A at the other end of the relay harness 25A connected to the first add-on harnesses 3A and 3B is connected to the base harness. It is inserted into the card edge connector 20 connected to the electric wire terminal branched at the two branch positions P1 and P3. Thereby, the electric wire 11 of the base harness 2 is electrically connected to the electric wires 15 of the first add-on harnesses 3A and 3B via the card edge connector 20, the electric wires 34 of the relay harness 25, and the card edge connector 30A.
Relay harnesses 25A and 25A are interposed between the trunk line 10 of the base harness 2 and the trunk lines of the first add-on harnesses 3A and 3B, respectively. The main line is wound with an adhesive tape 19 and bound.

  Since the wire harness 1B for middle grade vehicles assembled in the above procedure is bundled with the base harness 2 at a position close to the electrical equipment to which the first add-on harnesses 3A and 3B are connected, the length of the branch wires connected to each other can be shortened. And the position where 1st add-on harness 3A, 3B is assembled | attached to the base harness 2 can be grasped | ascertained easily from the attachment position of the card edge connector 20. FIG. Furthermore, since the first add-on harness is divided into two, the card edge connectors 20 and 30 can be reduced in size, and these card edge connectors 20 and 30 are the main line 10 of the base harness 2 and the first add-on harnesses 3A and 3B. It can be mounted without protruding from the main line, and interference with peripheral members can be prevented.

  The high-grade vehicle wire harness 1C shown in FIG. 3 is assembled by assembling the second add-on harness 4 (4A, 4B, 4C) to the wire harness 1B in which the first add-on harness 3 is assembled to the base harness 2. ing. Since the assembly of the second add-on harness 4 is the same as the assembly of the first add-on harness 3 to the base harness 2, the description thereof is omitted.

  In addition, after the wire harness assembling process and further after wiring the wiring harness to the automobile, optional electrical equipment that requires the first and second add-on harnesses 3 and 4 may be attached later. In this case, since the card harness connector 20 is attached to the outer peripheral surface in advance by branching the electric wires connected to the first and second add-on harnesses 3 and 4 in the base harness 2, the necessary first and second add-ons are provided. The harnesses 3 and 4 can be easily assembled to the base harness 2.

8A and 8B show the second embodiment.
In the second embodiment, the relay harness 25 used in the first embodiment is eliminated, the terminals of the electric wires 15 and 16 branched from the trunk lines of the first and second add-on harnesses 3 and 4, and the branch line of the base harness 2. A wiring board 40 to be inserted and connected to the connected card edge connector 20 is connected. In this case, the lengths of the electric wires 15 and 16 branched from the first and second add-on harnesses are longer than those in the first embodiment. However, since a separate relay harness is not necessary, the number of parts can be reduced, and the costs associated therewith can be reduced. Reduction can be achieved.

The present invention is not limited to the above-described embodiment. For example, the relay harness may be configured by a flexible printed circuit (FPC) instead of an electric wire.
Moreover, the present invention can be applied to door harnesses, floor harnesses, rear harnesses, engine harnesses and the like other than instrument panel harnesses arranged in automobiles.

1A, 1B, 1C Wire harness
2 Base harness 3 (3A, 3B) 1st add-on harness 4 (4A, 4B, 4C) 2nd add-on harness 5 Junction box 10 Trunk lines 11, 15, 16 of base harness Branched wires 13, 14 Trunk line 18 of add-on harness, 19 Adhesive tape 20, 30 Card edge connector 25 Relay harness 26, 27 Wiring board

Claims (6)

The wire harnesses routed to the vehicle are divided into base harnesses that are shared by all vehicle types and add-on harnesses that differ depending on the vehicle type.
The electric wire connected to the add-on harness is branched from the base harness and a connector is connected to the branched electric wire terminal, and the connector is a card edge connector into which a wiring board connected to the circuit on the add-on harness side is inserted. A wire harness characterized by. While branching the wires connected to the add-on harness dispersed at a plurality of positions of the trunk line of the base harness,
Among the circuits of the add-on harness, the power circuit, the ground circuit, and the signal circuit that can be shared with the base harness are branched from the base harness by branching from the main line of the add-on harness and the power circuit, the ground circuit, and the signal circuit. Electrically connected via the card edge connector,
The wire harness according to claim 1, wherein a terminal of the trunk line of the add-on harness is connected to an optional device mounted by grade , and is bound to the base harness at a position close to these devices.   A terminal fitting connected to an electric wire terminal branched from the base harness is inserted and locked to the card edge connector from one end side, and a circuit terminal provided on the wiring board inserted from an opposite insertion port is brought into contact with the terminal fitting. The wire harness according to claim 1 or 2, wherein the base harness and the add-on harness circuits are electrically connected to each other.   The circuit on the add-on harness side provided with the wiring board to be connected to the card edge connector is a branch wire branched from the trunk line of the add-on harness, and each branch wire terminal is electrically connected to the circuit of the wiring board. The wire harness according to any one of claims 1 to 3.   The circuit on the add-on harness side having the wiring board connected to the card edge connector at the terminal is a relay harness composed of an electric wire or a flexible printed circuit (FPC), and both ends of the relay harness are connected to the wiring board. The wiring board on one end side is connected to the card edge connector connected to the branch wire of the base harness, while the wiring board on the other end side is connected to the card edge connector connected to the wire terminal branched from the add-on harness. The wire harness according to any one of claims 1 to 3.   6. The wiring board to be inserted into the card edge connector includes a terminal part for connecting circuits of the base harness and the add-on harness, and a joint part for conducting required circuits. The wire harness of any one of Claims.

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