JP2015230874A - Wire harness - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wire harness capable of suppressing increase in part number of sub-harnesses that need to be prepared in advance.SOLUTION: A plurality of sub-harnesses 20-80 are each connected to a circuit board 11, and circuit lines of individual sub-harnesses 20-80 are connected with each other via a circuit pattern on the circuit board 11, and thereby the circuit board 11 and the plurality of sub-harnesses 20-80 constitute a wire harness 100. Since circuits such as a branch can be arranged on the circuit board 11, a construction of the circuit lines on each sub-harness is simplified. Thereby, the number of types and the part number of the sub-harnesses are reduced. Since one sub-harness can be constructed by joining the plurality of sub-harnesses, the length of each sub-harness is reduced as compared to the prior art, thereby facilitating manufacture. Multiple types of circuit boards with different circuit patterns are prepared in advance, and change in specifications is coped with by exchanging circuit boards.

Description

  The present invention relates to a wire harness configured using a plurality of sub-harnesses.

  Patent documents 1 and patent documents 2 are known about the prior art of the wire harness used for vehicles. As shown in FIG. 1 of Patent Document 1, such a wire harness is generally configured as an aggregate of a plurality of sub-harnesses prepared for each system, for example. The sub-harness to be bundled differs depending on the specifications required for the wire harness.

  Specifically, the electrical components required for a vehicle differ depending on the type of vehicle, which grade, and the required options. For this reason, the power supply line, ground wire, and signal connected to the electrical component are different. Lines and circuit lines constituting communication lines are different. In order to cope with such differences in circuit lines, for example, a collection of circuit lines for driving the electrical system in units of electrical systems is used as a sub-harness, and specifications required according to vehicle type, grade, and options Sub-harnesses corresponding to the above are selected, and the sub-harnesses are bundled to form one wire harness.

JP 2001-160464 A JP 2001-169433 A

  FIG. 6 shows a relationship between a specific configuration example of the wire harness WH and a plurality of types of sub-harnesses prepared in advance for configuring the wire harness. A configuration example of the wire harness shown in FIG. 6 will be described below.

  In FIG. 6, sub-harnesses A1, A2, B1, B2, and C are prepared as the sub-harness group SHG. Therefore, the wire harness WH can be configured by bundling a plurality of sub-harnesses appropriately selected from the sub-harness group SHG.

  For example, the wire harness WH can be configured as an assembly (Assy) that combines three of the sub-harness A2, the sub-harness B2, and the sub-harness C shown in FIG. However, it is necessary to change the configuration of the wire harness WH corresponding to the difference in specifications such as the type, grade, option, etc. of the vehicle on which the wire harness WH is mounted. That is, the number of electric wires constituting the wire harness WH, the presence / absence of a connector connected to each electric wire, and the like are appropriately changed.

In the example of FIG. 6, the overall configuration of the wire harness WH can be changed by changing the combination of sub-harnesses selected from the sub-harness group SHG as follows.
(1) The wire harness WH is configured by combining the sub-harness A1, the sub-harness B1, and the sub-harness C.
(2) The wire harness WH is configured by combining the sub-harness A2, the sub-harness B1, and the sub-harness C.
(3) The wire harness WH is configured by combining the sub-harness A1, the sub-harness B2, and the sub-harness C.
(4) The wire harness WH is configured by combining the sub-harness A1 and the sub-harness B1.
(5) The wire harness WH is configured by combining the sub-harness A2 and the sub-harness B1.
(6) The wire harness WH is configured by combining the sub harness A1 and the sub harness B2.

  In this way, the wire harness corresponds to different specifications depending on the vehicle type, grade, and options. Such a wire harness is routed, for example, in reinforcement as shown in FIG. This wire harness may be referred to as an instrument panel wire harness.

  In the current wire harness and sub-harness described above, a standard circuit that is always used regardless of the vehicle type, grade, and option (solid line in the figure; hereinafter may be referred to as a standard circuit line). And a circuit that is selectively added depending on the vehicle type, grade, and options (the chain line in the figure, hereinafter may be referred to as a selection circuit line).

  The more circuits that are selectively added to a sub-harness, the more different sub-harnesses must be prepared. Regarding the sub-harnesses A1 and A2 in the sub-harness group SHG in FIG. 6, since only one circuit is selectively added, only two types of sub-harnesses (A1 and A2) need be prepared. . However, when two circuits are selectively added, four types of sub-harnesses are required, and when three circuits are selectively added, eight types of sub-harnesses are required. That is, the types (part numbers) of sub-harnesses that must be prepared in advance increase exponentially.

  As described above, in the form in which the sub-harness is configured by combining the standard system circuit line and the selection circuit line, the sub-harness must be managed as the number of electrical components increases or as the number of vehicle types, grades, and options increases. The number of harnesses tends to increase.

  This invention is made | formed in view of the situation mentioned above, The objective is to provide the wire harness which can suppress the increase in the product number of the subharness which must be prepared in advance.

In order to achieve the above-described object, the wire harness according to the present invention is characterized by the following (1) to (5).
(1) a first sub-harness having a first circuit line;
A second sub-harness having a second circuit line;
A third sub-harness having a third circuit line;
A circuit board on which a circuit pattern that can be connected to at least two of the first sub-harness, the second sub-harness, and the third sub-harness is formed;
With
As the circuit board, a first circuit board and a second circuit board on which different circuit patterns are formed are prepared,
When the first sub-harness and the second sub-harness are connected to the first circuit board, the first circuit line and the second circuit line are circuits on the first circuit board. Conductive connection through the pattern,
When the first sub-harness and the third sub-harness are connected to the second circuit board, the first circuit line and the third circuit line are circuits on the second circuit board. Conductive connection through the pattern,
A wire harness characterized by that.
(2) further comprising a fourth sub-harness having a fourth circuit line;
When the third sub-harness and the fourth sub-harness are connected to the second circuit board, the third circuit line and the fourth circuit line are circuits on the second circuit board. Conductive connection through the pattern,
A wire harness having the structure of (1) above.
(3) Each of the first circuit board and the second circuit board is connected to at least two of the first sub-harness, the second sub-harness, and the third sub-harness, respectively. With a plurality of detachable connections,
A wire harness having the structure of (1) above.
(4) The circuit board is a printed board having an electrically insulating substrate and a conductive foil-like pattern attached to at least one surface of the substrate.
A wire harness according to any one of the above (1) to (3).
(5) The circuit board has a plurality of electrically insulating layers arranged in the thickness direction, and a plurality of foil-like patterns that are electrically separated from each other are connected to each boundary and surface of the plurality of electrically insulating layers. Are multilayer printed circuit boards respectively formed on
A wire harness having the structure of (4) above.

According to the wire harness having the configuration (1), an appropriate circuit board is selected from the first circuit board and the second circuit board, and the circuit board, the first sub-harness, and the first circuit board are selected. By combining at least two of the second sub-harness and the third sub-harness, a wire harness that meets the desired specifications can be realized. That is, it is possible to easily meet the requirements according to the specifications by replacing the circuit board.
According to the wire harness having the above configuration (2), when the second circuit board is selected, the circuit pattern on the second circuit board is connected to the third circuit line and the fourth circuit line. It can also be connected via. Therefore, various types of wire harnesses can be easily configured.
According to the wire harness having the above configuration (3), the first sub-harness, the second sub-harness, and the third sub-harness are connected to the first circuit board or the first sub-harness via the connection portion. Since the connection is made to the second circuit board, the connecting portion can be easily attached and detached, and the circuit board can be easily replaced.
According to the wire harness having the above configuration (4), the circuit pattern that connects the first circuit line of the first sub-harness and the second circuit line of the second sub-harness, The circuit pattern for connecting the first circuit line of one sub-harness and the third circuit line of the third sub-harness can be easily realized.
According to the wire harness having the configuration (5) described above, it is easy to maintain the insulation state of the plurality of circuit lines even at locations where the plurality of independent circuit lines intersect. Therefore, it is possible to form a circuit pattern having a complicated configuration, and it is possible to cope with an increase in the number of electric wires constituting the sub-harness.

  According to the wire harness of the present invention, it is possible to suppress an increase in the number of product numbers of sub-harnesses that must be prepared in advance. That is, since the connection state such as the presence / absence of connection between the first circuit line and the second circuit line and the branching of the circuit line can be switched by the circuit pattern inside the circuit board, Even when various types of connection states are required as a whole, the configuration of each of the first sub-harness and the second sub-harness can be simplified. Moreover, even if it comprises the case where the wire harness which connects a long distance path | route as a whole is comprised, the said 1st subharness and said 2nd subharness of a comparatively short length can be used.

  According to the wire harness, an appropriate circuit board is selected from the first circuit board and the second circuit board, and the circuit board, the first sub-harness, and the second sub-harness are selected. By combining at least two of the third sub-harnesses, a wire harness that meets the desired specifications can be realized. That is, it is possible to easily meet the requirements according to the specifications by replacing the circuit board.

  The present invention has been briefly described above. Further, the details of the present invention will be further clarified by reading through a mode for carrying out the invention described below (hereinafter referred to as “embodiment”) with reference to the accompanying drawings. .

FIG. 1 is a plan view showing an overall configuration example of the wire harness according to the first embodiment. FIG. 2 is a plan view showing each component prepared for configuring the wire harness of FIG. FIG. 3A and FIG. 3B are plan views showing configurations of two types of connection units that can be used to configure the wire harness in the second embodiment. FIG. 4 is a plan view showing the configuration of each sub-harness group that can be used to configure the wire harness in the second embodiment. FIG. 5A and FIG. 5B are plan views showing configuration examples of two types of wire harnesses in the second embodiment, respectively. FIG. 6 is a plan view illustrating a configuration example of a general wire harness and a sub-harness.

  Specific embodiments relating to the wire harness of the present invention will be described below with reference to the drawings.

<First Embodiment>
<Overall Configuration of Wire Harness 100>
An example of the overall configuration of the wire harness 100 in the first embodiment is shown in FIG. Moreover, each component prepared in advance for constituting the wire harness 100 of FIG. 1 is shown in FIG. In FIG. 1 and FIG. 2, each electric wire is described shorter than the actual one in order to facilitate the understanding of the configuration, but in the actual wire harness 100, about 10 [cm] to several hundred [cm]. It is assumed that an appropriate length of wire is used as necessary. In addition, the wire harness and sub-harness of FIG. 1 are standard circuits that are always used for any vehicle type, grade, and option (solid line in the figure. Hereinafter, they may be referred to as standard circuit lines). ) And a circuit that is selectively added depending on the vehicle type, grade, and options (the chain line in the figure, hereinafter may be referred to as a selection circuit line).

  The wire harness 100 shown in FIG. 1 is configured by combining one connection unit 10, three standard sub-harnesses 20, 30, and 40 and four optional sub-harnesses 50, 60, 70, and 80. It is.

  Specifically, the connector 22 connected to one end of the standard system sub-harness 20 prepared in advance is connected to the board-side connector 12 a of the connection unit 10. In addition, a connector 31 connected to one end of the standard sub-harness 30 prepared in advance is connected to the board-side connector 12 b of the connection unit 10. Further, the board-side connector 12 c connected to one end of the standard sub-harness 40 prepared in advance is connected to the board-side connector 12 c of the connection unit 10. Further, the connector 52 of the optional sub-harness 50 is connected to the board-side connector 12 d of the connection unit 10, the connector 62 of the optional sub-harness 60 is connected to the board-side connector 12 e of the connection unit 10, and The connector 72 is connected to the board-side connector 12 f of the connection unit 10, and the connector 81 of the optional sub-harness 80 is connected to the board-side connector 12 g of the connection unit 10.

  That is, the end portions of the three standard sub-harnesses 20 to 40 and the four optional sub-harnesses 50 to 80 are physically connected to the connection unit 10. Accordingly, the electric wires of the standard system sub-harnesses 20 to 40 and the optional system sub-harnesses 50 to 80 can be electrically connected to each other using a circuit pattern described later provided in the connection unit 10.

  The wire harness 100 shown in FIG. 1 includes a connection unit 10, three standard sub-harnesses 20 to 40, and four optional sub-harnesses 50 to 80. Each of 80 is selectively connected to the connection unit 10. That is, each of the four optional sub-harnesses 50 to 80 is selectively connected to the connection unit 10 in accordance with specifications required for the wire harness according to the vehicle type, grade, and presence / absence of various options of the vehicle on which the wire harness 100 is mounted. A wire harness 100 as shown in FIG.

<Description of each component>
<Description of connection unit 10>
The connection unit 10 illustrated in FIG. 2 includes a circuit board 11 that is configured as a thin plate and has a rectangular planar shape, and a plurality of board-side connectors 12 a to 12 g that are mounted on the circuit board 11. Specifically, the circuit board 11 is configured as a printed board including an electrically insulating board 11b and a circuit pattern 11a formed on the board. When the circuit pattern 11a having a relatively complicated configuration is formed, the circuit board 11 is configured using a printed circuit board having a multilayer structure.

  The circuit pattern 11a is configured as a conductive foil pattern such as a copper foil attached to the front surface, the back surface, or the boundary surface of the layer in the thickness direction of the electrically insulating substrate 11b. Further, the circuit pattern 11a includes a large number of wirings connecting the board-side connectors 12a to 12g, as indicated by dotted lines in FIG. Although many of these wirings are electrically isolated from each other, some of the wirings are electrically connected to each other. When a plurality of wirings are separated at a location where they intersect on the plane shown in FIG. 2, the wirings are arranged on different surfaces or layers and are electrically separated. Moreover, when connecting the wiring arrange | positioned in a mutually different surface or layer, electrical connection is implement | achieved using the through hole which penetrates the electrically insulating board | substrate 11b in the thickness direction.

  The connection unit 10 shown in FIG. 2 includes board-side connectors 12a to 12g in order to facilitate attachment / detachment with respect to the connection with the standard system sub-harnesses 20 to 40 and the option system sub-harnesses 50 to 80.

  In order to protect the connection unit 10 and to prevent the circuit pattern 11a from being in electrical contact with the surrounding circuit, it is conceivable that the connection unit 10 is accommodated in an appropriate housing. . Moreover, you may comprise so that the circumference | surroundings of the connection unit 10 may be covered with electrically insulating resin etc.

<Description of standard sub-harness>
The standard sub-harness 20 shown in FIG. 2 includes three electric wires 23a, 23b, and 23c, and connectors 21 and 22 connected to both ends thereof. As a specific example, it is assumed that the electric wire 23a is used as a power supply line for supplying power, the electric wire 23b is used as a ground wire, and the electric wire 23c is used as a signal line or a communication line.

  Each of the electric wires 23a, 23b, and 23c is configured by covering a conductor such as a stranded wire with an electrically insulating resin or the like. About the thickness of the conductor of each electric wire 23a, 23b, and 23c, the thickness of covering, and material, it determines suitably according to the electric current value and voltage value which change according to a specification. In the example of FIG. 2, it is assumed that the three electric wires 23a, 23b, and 23c are electric wires that are standardly installed in all vehicles. Therefore, there is only one type of standard system subharness 20.

  The standard sub-harness 40 shown in FIG. 2 includes an electric wire group 44 composed of six electric wires, and three connectors 41, 42, and 43 connected to these ends. It is assumed that the six electric wires constituting the electric wire group 44 are electric wires that are standardly equipped on all vehicles. Therefore, there is only one type of standard system subharness 40.

  Each of the six electric wires constituting the electric wire group 44 is used as, for example, a power line, a ground line, a signal line, a communication line, or the like.

  2 includes an electric wire group 34a, an electric wire 34b, an electric wire group 34c, and connectors 31, 32, and 33. The electric wire group 34a is constituted by four electric wires, and the electric wire group 34c is constituted by two electric wires.

  In the standard system sub-harness 30 of FIG. 2, the electric wire group 34 a and the electric wire 34 b are electric wires that are standardly equipped on all vehicles, and the electric wire group 34 c has specifications required for the wire harness 100, that is, vehicle The presence / absence of each electric wire is selected depending on the vehicle type, grade, and presence / absence of various options. Accordingly, there may be two or more types (part numbers) of the standard system sub-harness 30 to be prepared in advance.

<Description of optional sub-harness>
The optional sub-harness 50 shown in FIG. 2 includes an electric wire 53 and two connectors 51 and 52 connected to both ends thereof. About the length of the electric wire 53, the shape of the connector 51, etc., it determines according to the specification of the option type subharness 50. FIG.

  The optional sub-harness 60 shown in FIG. 2 includes an electric wire group 63 and two connectors 61 and 62 connected to both ends thereof. The electric wire group 63 is composed of two electric wires. The length of the wire group 63, the shape of the connector 61, and the like are determined according to the specifications of the optional sub-harness 60.

  The optional sub-harness 70 shown in FIG. 2 includes an electric wire 73 and two connectors 71 and 72 connected to both ends thereof. About the length of the electric wire 73, the shape of the connector 71, etc., it determines according to the specification of the option type subharness 70. FIG.

  The optional sub-harness 80 shown in FIG. 2 includes an electric wire 83 and two connectors 81 and 82 connected to both ends thereof. About the length of the electric wire 83, the shape of the connector 82, etc., it is determined according to the specification of the option type subharness 80.

  Each of the optional sub-harnesses 50, 60, 70, and 80 is basically only one type, but may be two or more types as necessary.

<Advantages regarding the wire harness 100 of the first embodiment>
Each of the various sub-harnesses that make up the conventional wire harness has various standard circuit lines that are common to all vehicles, and various selection circuits that are selectively added according to the vehicle type, grade, presence / absence of various options, etc. It was made up of routes. For this reason, as the number of selection circuit lines provided in a certain sub-harness increases, the number of sub-harness parts to be prepared increases exponentially. On the other hand, with respect to the wire harness 100 shown in FIG. 1, as shown in FIG. 2, standard system sub-harnesses 20 to 40 formed by standard system circuit lines and an optional system sub-harness 50 formed by selected circuit lines. ~ 80 are formed as different sub-harnesses. When the sub-harness is configured in this way, even if the number of selection circuit lines is increased by n, the increase in the number of the sub-harness is only n. In this way, the increase in the number of sub-harnesses can be significantly suppressed as compared with the number of the conventional sub-harnesses.

  Moreover, in the wire harness 100 shown in FIG. 1, the circuit board 11 of the connection unit 10 plays the role regarding the connection between the circuit lines of each sub-harness. That is, the circuit line connection form is determined by the circuit board 11. For this reason, since it is not necessary to provide a branch on each sub-harness, the shape of the sub-harness can be a simple one without a branch. For this reason, a subharness can be manufactured more cheaply. On the other hand, the circuit board 11 needs to be provided with a circuit pattern for connecting all circuit lines. However, even if the total number of circuit lines is estimated to the maximum, the circuit board 11 is not expensive. For this reason, a cheaper wire harness can be provided by using a simpler configuration for the entire wire harness.

  In addition, since the shape of the sub-harness is simple with few branches, the similarity of the shapes is increased in the plurality of sub-harnesses. This means that the versatility of the sub-harness is increased. As a result, it is possible to use a sub-harness at a plurality of locations in a certain wire harness, or to share a sub-harness such that a sub-harness used in a certain wire harness can be used in another wire harness. Can be achieved. This means that a common sub-harness can be used for various wire harnesses.

  The reason why the sub-harness can be shared as described above is because the circuit board 11 plays a role of connection between the circuit line and the circuit line. The circuit board 11 has not only a so-called joint function for connecting circuit lines to circuit lines, but also a rectifying function for adjusting a connection relationship of selecting a plurality of circuit lines to be connected. If circuit boards having different circuit patterns are prepared, the connection relationship between circuit lines and circuit lines can be changed arbitrarily. This means that the specifications required for the wire harness can be switched by the circuit pattern of the circuit board. Sub-harness can be shared, and the function of changing specifications can be integrated into the circuit board, so that the wiring harness can be shared across vehicle grades and options, and the wiring harness can also be shared across vehicle types. it can. Although the conventional wire harness was designed for every vehicle type, if it is the wire harness 100 of FIG. 1, a wire harness can be designed, without being restrained by the framework of a vehicle type.

  Next, the advantages of the wire harness 100 are captured in terms of work efficiency when manufacturing the wire harness. In the plurality of standard sub-harnesses 20 to 40 constituting the wire harness 100, one electric wire constituting the conventional sub-harness (A1, A2, B2 in FIG. 6) is connected to the two electric wires. Realized. For this reason, the standard system sub-harnesses 20 to 40 may have a shorter wire length than the conventional sub-harness. This means that when the sub-harness is routed on the jig plate, the distance for the operator to place one electric wire along the route is short. Considering that the operator has to move more as long as the length of the electric wire is longer, the shorter length of the electric wire contributes to the efficiency of the sub-harness routing work.

Second Embodiment
<Overall configuration of wire harness>
Configurations of two types of connection units that can be used to configure the wire harness in the second embodiment are shown in FIGS. Moreover, each structure of the sub harness group which can be utilized in order to comprise a wire harness in 2nd Embodiment is shown in FIG. Moreover, each structural example of two types of wire harnesses in 2nd Embodiment is shown to Fig.5 (a) and FIG.5 (b), respectively. In addition, in order to make an understanding of a structure easy in FIGS. 3-5, although each electric wire is described shorter than actual, in an actual wire harness, about 10 [cm]-about several hundred [cm] It is assumed that an appropriate length of electric wire is used as necessary.

  The wire harness 100A illustrated in FIG. 5A is configured by combining one connection unit 10A and three standard sub-harnesses 20, 30, and 40. In addition, the wire harness 100B illustrated in FIG. 5B includes one connection unit 10B, three standard sub-harnesses 20, 30, and 40, and four optional sub-harnesses 50, 60, 70, and 80. Are combined.

  When configuring the wire harness 100A, the connection unit 10A is selectively used, and when configuring the wire harness 100B, the connection unit 10B is selectively used. The connection units 10A shown in FIG. 3A and the connection units 10B shown in FIG. 3B employ circuit boards 11A and 11B having different circuit patterns.

  Specifically, the connector 22 connected to one end of the standard sub-harness 20 prepared in advance is connected to the board-side connector 12a of the connection unit 10A or 10B. Further, a connector 31 connected to one end of a standard sub-harness 30 prepared in advance is connected to the board-side connector 12b of the connection unit 10A or 10B. Further, the board-side connector 12 c connected to one end of the standard sub-harness 40 prepared in advance is connected to the board-side connector 12 c of the connection unit 10. Further, the connector 52 of the optional sub-harness 50 is connected to the board-side connector 12 d of the connection unit 10, the connector 62 of the optional sub-harness 60 is connected to the board-side connector 12 e of the connection unit 10, and The connector 72 is connected to the board-side connector 12 f of the connection unit 10, and the connector 81 of the optional sub-harness 80 is connected to the board-side connector 12 g of the connection unit 10.

  That is, the three standard sub-harnesses 20 to 40 constituting the wire harness 100A are all physically connected to the connection unit 10A at the ends. Also, the three standard sub-harnesses 20 to 40 and the four optional sub-harnesses 50 to 80 constituting the wire harness 100B are all physically connected to the connection unit 10B. Therefore, the electric wires of the standard sub-harnesses 20 to 40 and the optional sub-harnesses 50 to 80 can be electrically connected to each other using a circuit pattern described later provided in the connection unit 10A or 10B. it can.

  The wire harness 100 shown in FIG. 1 includes a connection unit 10, three standard sub-harnesses 20 to 40, and four optional sub-harnesses 50 to 80. Each of 80 is selectively connected to the connection unit 10. For example, when the optional sub-harnesses 50 to 80 are not connected, the connection unit 10A is selectively used, and when the optional sub-harnesses 50 to 80 are connected, the connection unit 10B is selectively used.

  That is, with respect to changes in the specifications of the wire harness that changes depending on the vehicle type, grade, and various options of the vehicle on which the wire harness is mounted, the difference in the connection form of each circuit line is different in the circuit patterns in the connection units 10A and 10B. Absorb with. Each of the four optional sub-harnesses 50 to 80 is selectively connected to the connection unit 10B, and a wire harness 100A or 100B as shown in FIGS. 5 (a) and 5 (b) is configured.

<Description of each component>
<Description of connection units 10A and 10B>
The connection unit 10A shown in FIG. 3A includes a circuit board 11A configured as a thin plate and having a rectangular planar shape, and a plurality of board-side connectors 12a to 12c attached to the circuit board 11A. Specifically, the circuit board 11A is configured as a printed board including an electrically insulating board 11b and a circuit pattern 11a formed on the board. When the circuit pattern 11a having a relatively complicated configuration is formed, the circuit board 11 is configured using a printed circuit board having a multilayer structure.

  The connection unit 10B shown in FIG. 3B includes a circuit board 11B and a plurality of board-side connectors 12a to 12g attached to the circuit board 11B. The difference between the circuit board 11A and the circuit board 11B is only the difference between the circuit patterns 11Aa and 11Ba formed on them.

  Each of the circuit patterns 11Aa and 11Ba is configured as a conductive foil-like pattern such as a copper foil attached to the front surface, the back surface, or the boundary surface of the layer in the thickness direction of the electrical insulating substrate 11b. In addition, each of the circuit patterns 11Aa and 11Ba includes a large number of wirings connecting between the board-side connectors 12a to 12g, as indicated by dotted lines in FIGS. 3 (a) and 3 (b). As shown in FIGS. 3A and 3B, the circuit patterns 11Aa and 11Ba are different from each other. That is, the circuit pattern 11Aa is configured to realize connection between circuit lines in accordance with the specifications of the wire harness 100A illustrated in FIG. 5A, and the circuit pattern 11Ba is configured to be the wire harness 100B illustrated in FIG. It is configured to realize connection between the circuit lines according to the specifications.

  Many wirings on the circuit patterns 11Aa and 11Ba are electrically separated from each other, but some wirings are electrically connected to each other. When a plurality of wirings are separated at a location where they intersect on the plane shown in FIGS. 3A and 3B, the wirings are arranged on different surfaces or layers and are electrically separated. Moreover, when connecting the wiring arrange | positioned in a mutually different surface or layer, electrical connection is implement | achieved using the through hole which penetrates the electrically insulating board | substrate 11b in the thickness direction.

  The connection units 10A and 10B shown in FIGS. 3A and 3B are board-side connectors for facilitating attachment / detachment with respect to the connection with the standard system sub-harnesses 20 to 40 and the option system sub-harnesses 50 to 80. 12a-12g.

  In order to protect the connection units 10A and 10B and to prevent the circuit patterns 11Aa and 11Ba from being in electrical contact with surrounding circuits, the connection units 10A and 10B are accommodated in an appropriate housing. It can also be configured. Moreover, you may comprise so that the circumference | surroundings of a connection unit may be covered with an electrically insulating resin.

<Description of standard sub-harness>
The standard sub-harness 20 shown in FIG. 4 includes three electric wires 23a, 23b, and 23c, and connectors 21 and 22 connected to both ends thereof. As a specific example, it is assumed that the electric wire 23a is used as a power supply line for supplying power, the electric wire 23b is used as a ground wire, and the electric wire 23c is used as a signal line or a communication line.

  Each of the electric wires 23a, 23b, and 23c is configured by covering a conductor such as a stranded wire with an electrically insulating resin or the like. About the thickness of the conductor of each electric wire 23a, 23b, and 23c, the thickness of covering, and material, it determines suitably according to the electric current value and voltage value which change according to a specification. Moreover, in the example of FIG. 4, it is assumed that the three electric wires 23a, 23b, and 23c are electric wires that are normally installed in all vehicles. Therefore, there is only one type of standard system subharness 20.

  The standard sub-harness 40 shown in FIG. 4 is composed of an electric wire group 44 composed of six electric wires, and three connectors 41, 42, and 43 connected to these ends. It is assumed that the six electric wires constituting the electric wire group 44 are electric wires that are standardly equipped on all vehicles. Therefore, there is only one type of standard system subharness 40.

  Each of the six electric wires constituting the electric wire group 44 is used as, for example, a power line, a ground line, a signal line, a communication line, or the like.

  The standard sub-harness 30 shown in FIG. 4 includes an electric wire group 34a, an electric wire 34b, an electric wire group 34c, and connectors 31, 32, and 33. The electric wire group 34a is constituted by four electric wires, and the electric wire group 34c is constituted by two electric wires.

  In the standard system sub-harness 30 of FIG. 4, the electric wire group 34 a and the electric wire 34 b are electric wires that are standardly equipped on all vehicles, and the electric wire group 34 c has specifications required for the wire harness 100, that is, vehicle The presence / absence of each electric wire is selected depending on the vehicle type, grade, and presence / absence of various options. Accordingly, there may be two or more types (part numbers) of the standard system sub-harness 30 to be prepared in advance.

<Description of optional sub-harness>
The optional sub-harness 50 shown in FIG. 4 includes an electric wire 53 and two connectors 51 and 52 connected to both ends thereof. About the length of the electric wire 53, the shape of the connector 51, etc., it determines according to the specification of the option type subharness 50. FIG.

  The optional sub-harness 60 shown in FIG. 4 includes an electric wire group 63 and two connectors 61 and 62 connected to both ends thereof. The electric wire group 63 is composed of two electric wires. The length of the wire group 63, the shape of the connector 61, and the like are determined according to the specifications of the optional sub-harness 60.

  The optional sub-harness 70 shown in FIG. 4 includes an electric wire 73 and two connectors 71 and 72 connected to both ends thereof. About the length of the electric wire 73, the shape of the connector 71, etc., it determines according to the specification of the option type subharness 70. FIG.

  The optional sub-harness 80 shown in FIG. 4 includes an electric wire 83 and two connectors 81 and 82 connected to both ends thereof. About the length of the electric wire 83, the shape of the connector 82, etc., it is determined according to the specification of the option type subharness 80.

  Each of the optional sub-harnesses 50, 60, 70, and 80 is basically only one type, but may be two or more types as necessary. For example, for the wire harness 100 mounted on a plurality of types of vehicles having greatly different body sizes, the distance between the electrical components may be greatly different. Therefore, optional sub-harnesses 50 to 80 having different lengths are prepared in advance. It is also necessary to keep it.

<Advantages regarding the wire harnesses 100A and 100B of the second embodiment>
When the wire harnesses 100A and 100B shown in FIGS. 5A and 5B are configured, a plurality of circuit patterns 11Aa and 11Ba on the circuit boards 11A and 11B, which are a part of the wire harnesses, are simply replaced. The electrical connection state between the sub-harnesses can be changed. For example, when the circuit board 11B of FIG. 3B is selected, each circuit line of the optional sub-harnesses 50, 60, 70 and the standard sub-harness 30 as in the wire harness 100B of FIG. The circuit lines of the optional sub-harness 50 and the circuit lines of the standard sub-harness 40 can also be connected. When the circuit board 11A of FIG. 3A is selected, only connection of circuit lines between the standard system sub-harnesses 20, 30, and 40 becomes possible.

  Therefore, it is possible to configure wire harnesses of various specifications by using a plurality of sub-harnesses having relatively few types and product numbers in common. That is, since the sub-harness having the same configuration can be shared for the wire harnesses having a plurality of specifications, the types and product numbers of the sub-harnesses to be prepared in advance can be greatly reduced.

Here, the characteristics of the embodiment of the wire harness according to the present invention described above are briefly summarized and listed in the following (1) to (5), respectively.
(1) a first sub-harness (standard sub-harness 30) having a first circuit line;
A second sub-harness (standard sub-harness 40) having a second circuit line;
A third sub-harness (optional sub-harness 50, 60, 70) having a third circuit line;
A circuit board (11A, 11B) on which a circuit pattern (10a) that can be connected to at least two of the first sub-harness, the second sub-harness, and the third sub-harness is formed;
With
As the circuit board, a first circuit board (11A) and a second circuit board (11B) in which different circuit patterns are formed are prepared,
When the first sub-harness and the second sub-harness are connected to the first circuit board, the first circuit line and the second circuit line are circuits on the first circuit board. Conductive connection through the pattern,
When the first sub-harness and the third sub-harness are connected to the second circuit board, the first circuit line and the third circuit line are circuits on the second circuit board. Conductive connection through the pattern,
A wire harness (100A) characterized by that.
(2) A fourth sub-harness (optional sub-harness 80) having a fourth circuit line is further provided,
When the third sub-harness and the fourth sub-harness are connected to the second circuit board, the third circuit line and the fourth circuit line are circuits on the second circuit board. Conductive connection through the pattern,
A wire harness having the structure of (1) above.
(3) Each of the first circuit board and the second circuit board is connected to at least two of the first sub-harness, the second sub-harness, and the third sub-harness, respectively. A plurality of detachable connection portions (board side connectors 12a to 12g) are provided.
A wire harness having the structure of (1) above.
(4) The circuit board is a printed board having an electrically insulating substrate and a conductive foil-like pattern attached to at least one surface of the substrate.
A wire harness according to any one of the above (1) to (3).
(5) The circuit board has a plurality of electrically insulating layers arranged in the thickness direction, and a plurality of foil-like patterns that are electrically separated from each other are connected to each boundary and surface of the plurality of electrically insulating layers. Are multilayer printed circuit boards respectively formed on
A wire harness having the structure of (4) above.

10, 10A, 10B Connection unit 11, 11A, 11B Circuit board 11a, 11Aa, 11Ba Circuit pattern 11b Electrical insulation board 12a, 12b, 12c, 12d, 12e, 12f, 12g Board side connector 20, 30, 40 Standard system sub Harness 21, 22, 31, 32, 33, 41, 42, 43 Connector 23a, 23b, 23c, 34b, 53, 73, 83 Electric wire 34a, 34c, 44, 63 Electric wire group 50, 60, 70, 80 Optional system sub Harness 51, 52, 61, 62, 71, 72, 81, 82 Connector 100, 100A, 100B, WH Wire harness SHG Sub-harness group A1, A2, B1, B2, C Sub-harness

Claims (5)

A first sub-harness having a first circuit line;
A second sub-harness having a second circuit line;
A third sub-harness having a third circuit line;
A circuit board on which a circuit pattern that can be connected to at least two of the first sub-harness, the second sub-harness, and the third sub-harness is formed;
With
As the circuit board, a first circuit board and a second circuit board on which different circuit patterns are formed are prepared,
When the first sub-harness and the second sub-harness are connected to the first circuit board, the first circuit line and the second circuit line are circuits on the first circuit board. Conductive connection through the pattern,
When the first sub-harness and the third sub-harness are connected to the second circuit board, the first circuit line and the third circuit line are circuits on the second circuit board. Conductive connection through the pattern,
A wire harness characterized by that. A fourth sub-harness having a fourth circuit line;
When the third sub-harness and the fourth sub-harness are connected to the second circuit board, the third circuit line and the fourth circuit line are circuits on the second circuit board. Conductive connection through the pattern,
The wire harness according to claim 1. Each of the first circuit board and the second circuit board is detachable for connecting to at least two of the first sub-harness, the second sub-harness, and the third sub-harness, respectively. Comprising a plurality of connections,
The wire harness according to claim 1. The circuit board is a printed board having an electrically insulating substrate and a conductive foil-like pattern attached to at least one surface of the substrate.
The wire harness according to any one of claims 1 to 3, wherein the wire harness is provided. The circuit board has a plurality of electrical insulation layers arranged in the thickness direction, and a plurality of foil-like patterns electrically separated from each other are formed on each boundary and surface of the plurality of electrical insulation layers, respectively. Multi-layer printed circuit board,
The wire harness according to claim 4.

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