JP2002218629A - Wiring structure and its manufacturing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wiring arrangement structure and its manufacturing method to reduce the number of connectors. SOLUTION: This invention comprises a plurality of busbars 6 held in separation from each other, a centralized connector 2 such as one end of the above busbar 6 is made terminals, a harness 4 which is connected to another end of the above busbar 6 through the connection terminals 4a and has connectors for peripheral electronic equipment, and a mold B which is molded in are body with the above busbars 6, a centralized connector 2 and the connection terminal 4a of the harness 4 by covering together with resin.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wiring structure for an automobile, and more particularly to a wiring structure suitable for use as a component of an internal combustion engine or an automatic transmission having a plurality of electronic components, and a method of manufacturing the wiring structure. About.

[0002]

2. Description of the Related Art Conventionally, in an internal combustion engine equipped with a plurality of electronic components, a problem caused by complicated wiring harness, that is, a complicated fitting operation of a connector, disconnection and contact. As a wiring structure that has improved problems such as difficulty in finding defective parts easily,
For example, there is one described in JP-A-9-317556.

[0003] This wiring structure relates to a cylinder head cover which does not require a complicated wiring harness. The cylinder head cover is formed of heat-resistant resin, and is disposed on the side of the cylinder head cover outside the internal combustion engine. In addition to providing a plurality of connectors for connecting with electronic components to be provided, a contact for obtaining connection with electronic components disposed inside the internal combustion engine is provided inside the cylinder head cover, and another side of the cylinder head cover is provided. A centralized connector to be connected to the electronic control unit is provided, and a wiring portion for electrically connecting contacts such as a connector and terminals of the centralized connector is extended in a wall surface of the cylinder head cover.

[0004]

However, in the above conventional example, since the connectors of the harnesses for connecting external electronic components are connected to the respective connectors arranged on the side surfaces of the cylinder head cover, the external electronic components are connected. A large number of connectors are required, including a connector for connecting a component to a connection harness, and the connection of the connector is troublesome.

[0005] Further, since the connecting connectors are provided on the cylinder head cover side and the external electronic component side, there is a possibility that the connection quality is degraded.

The present invention has been made in view of the above problems, and has as its object to provide a wiring structure and a method for manufacturing the wiring structure, which can reduce the number of connection connectors.

[0007]

According to a first aspect of the present invention, a plurality of busbars held apart from each other, a centralized connector having one end of the busbar as a terminal, and the other end of the busbar are provided. And a bush, a centralized connector, and a resin molded body integrally formed by covering the periphery of the connection terminal of the harness with a resin. It is characterized by the following.

According to a second aspect of the present invention, in the first aspect, the frame that holds the plurality of busbars separated from each other surrounds at least two sides of a connection portion between the busbar and the connection terminal of the harness. A holding portion is provided, and the connection portion is integrated with the holding portion by a resin mold.

According to a third aspect of the present invention, in the second aspect, a length of a portion of the bus bar held by the frame body extending to the centralized connector is a portion of the bus bar held by the adjacent frame body extending to the centralized connector. Characterized by being formed so as to have a length different from the length.

According to a fourth aspect of the present invention, a plurality of busbars are separated from each other by a molten resin and fixed to each other to form a primary molded body. Then, one end of the busbar of the primary molded body is connected to peripheral electronic equipment. The connection terminals of the harness provided with the connector are connected, and the periphery of the connection portion is covered with a mold resin to be integrally fixed to the primary molded body. Then, the primary molded body including the connection portion constitutes a structure. It is characterized by a manufacturing method in which a secondary molded body constituting a centralized connector is obtained at the other end of the bus bar by being integrally molded by covering with a resin.

In a fifth aspect based on the fourth aspect, the primary molded body is formed by exposing a part of the bus bar to the outside, and an exposed portion of the bus bar is covered with a resin constituting the secondary molded body. The manufacturing method is characterized in that:

In a sixth aspect based on the fourth or fifth aspect, the primary molded body has a holding portion surrounding a part of the connection portion, and the molding resin fixes the connection portion in the holding portion. A feature of this method is that the fixing portion is covered with a resin constituting the secondary molded body.

[0013]

Therefore, in the first invention, since the harness to the external electronic component connected to the bus bar is provided through the connection portion integrated in the resin molded body constituting the wiring structure, The electronic control unit and the external electronic components can be connected only by connecting the connector of the electronic component and the connector at the end of the harness, so that the number of connectors and the number of connection points can be reduced, reducing cost and reducing the number of connection points. Poor connection can be reduced and the quality can be improved.

In the second invention, in addition to the effect of the first invention, the connection between the bus bar and the connection terminal of the harness is integrated with the holding portion of the frame for holding the plurality of bus bars by resin molding. The part is completely shut off from the outside air, so that the deterioration of the contact quality between them can be prevented, and the poor contact can be avoided.

In addition, the connection portion may have a smaller space as compared with the case where the connectors are connected to each other, so that the degree of integration of the wiring structure 1 can be increased and the size can be reduced.

According to the third invention, in addition to the effect of the second invention, the length of the portion of the bus bar extending to the centralized connector is the same as that of the portion of the bus bar extended to the centralized connector of the bus bar held by another frame superposed. Since the harnesses 4 are formed so as to have different lengths, the respective harnesses 4 can be prevented from overlapping on a plane, and the target electronic device can be easily identified at the time of assembling work, and the assembling workability can be improved.

In the fourth aspect of the present invention, a plurality of bus bars are separated from each other, and a connection terminal of a harness to a peripheral electronic device is connected to an end of the bus bar of the primary molded body fixed by a molten resin. It is fixed integrally, and furthermore, the primary molded body is covered with the resin constituting the secondary molded body including the connecting part and integrally molded, so after completing the wiring structure, the harness is connected and the connecting part is molded with resin. As compared with the case where the process is performed, the manufacturing process can be integrated and the manufacturing process can be simplified.

According to the fifth invention, in addition to the effect of the fourth invention, a part of the bus bar is exposed to the outside when the bus bar is held in contact with the primary molded body without contact. The molten resin 17 at the time of the secondary molding surrounds the exposed portion of the bus bar 6 and is hardened, so that it can be firmly combined with the primary molded body.

According to the sixth aspect of the invention, in addition to the effects of the fourth or fifth aspect, the connection portion between the connection terminal of the harness and the bus bar is formed so as to be surrounded by the holding portion of the primary molded body A. The connection portion can be easily filled and sealed with the mold resin, and workability at that time is also good.

Further, it is possible to prevent the mold resin from being damaged during the injection molding of the secondary molded body.

[0021]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a plan view of a wiring structure according to the present invention, FIG. 2 is a side view thereof, and FIG. 3 is a partially enlarged view partially cut away.

The wiring structure 1 is made of resin (for example, nylon 6).
6, nylon 6), centralized connectors 2, 3 arranged on one side and connected to an electronic control unit (not shown), and drawn out from the other two sides of the structure 1 and arranged. A plurality of harnesses 4 and 5 electrically connected to an electronic component (not shown, hereinafter referred to as an external electronic component) provided outside, and the centralized connectors 2 and 3 and a plurality of harnesses 4 and 5; And a bus bar 6 connected to each other in the structure 1.

The bus bar 6 is arranged in a plane, and 10 to 15 bus bars 6 constitute a first unit 7.
3 and a portion 6b extending toward the harness 4 form a substantially "L" shape, and as shown in FIG.
Each of the portions 6a and 6b of the bus bar 6 is resin-molded (for example, nylon 66, nylon 6) in a frame 8 including a horizontal beam 8a and a vertical beam 8b surrounding a part of the bus bar 6 in an aligned state. , So that the bus bars 6 do not come into contact with each other.

The second unit 9 composed of a plurality of bus bars 10 is located within a plane offset from the first unit 7.
0 to 15 wires are formed, and a portion 10a extending to the centralized connectors 2 and 3 and a portion 10b extending to the harness 4 side form a substantially "L" shape.
The frame 11 is composed of a horizontal beam 11a and a vertical beam 11b that surround a part of the bus bar 10 in an aligned state.
The bus bars 10 are held so as not to contact with each other by being molded.

The shortest part 10a of the bus bar 10 of the second unit 9 extending to the centralized connectors 2 and 3 is the centralized connector 2 of the bus bar 6 of the first unit 7.
3 is longer than the longest portion 6a, the portions 6b, 10 extending to the harness 4 of the busbars 6, 10 when the first and second units 7, 9 are overlapped.
b can be prevented from overlapping on a plane.

The ends of the portions 6b, 10b of the first and second units 7, 9 extending toward the harness 4 of the bus bars 6, 10 are engaged with the connection terminals 4a of the respective harnesses 4 to form the frames of the bus bars 6, 10. A portion 6b projecting from the body 8, 11;
10b, the connection terminal 4a, and part of the harness 4
A holding portion 8c formed upright from the frames 8, 11;
11c, which is surrounded by three sides,
For example, the so-called "epoxy resin" injected into the groove of 1c
Are molded integrally with the frames 8 and 11 by a resin 12 made of.

The respective harnesses 4 are bundled for each electronic component, and the other end is attached to a connector 4b for connecting to an external electronic component.

Then, the first and second units 7, 9 with the harness 4, and the third and fourth units 13, 14 formed in the same manner as the first and second units 7, 9 are in a state where they are positioned, respectively. The ends of the centralized connectors 2, 3 of the bus bars 6, 10, 15 and 16 of the units 7, 9, 13, 14 are arranged in two rows, leaving the two rows of tips.
The structure 1 includes the holding portions 8c and 11c on the harness 4 side.
Is molded integrally with the molten resin 17 to form the structure 1 into a predetermined shape.

The centralized connectors 2, 3 are arranged in two rows to expose bus bars 6, 10, 1, exposed from the structure 1 to the outside.
End portions of the terminals 5 and 16 are terminals 6c, 10c, 15c and 16c, and socket portions 2a and 3a which protrude from the structure 1 around the terminals 6c, 10c, 15c and 16c are formed.

The mounting hole 1 provided in the wiring structure 1
Using a, for example, it is fixed on the cylinder head cover of the engine.

The bus bars 6, 10, 1 of the wiring structure 1
5 and 16 are arranged in one plane.
They can be arranged in two layers or can be formed in multiple layers.

The wiring structure 1 according to the present embodiment can provide the following effects.

Since the wiring structure 1 is provided with a dedicated harness 4 having a connector 4b at the tip with respect to the external electronic component, only the connection between the connector of the electronic component (not shown) and the tip connector 4b is required. An electronic control unit (not shown) can be connected to an external electronic component, and the number of connectors 4b and the number of connection points can be reduced, thereby reducing costs. In addition, the number of connection points can be reduced, so that connection failures can be reduced. Quality can be improved.

The plurality of bus bars 6, 10, 1
The fitting portions between the end portions 6b, 10b, 15b, 16b of 5, 5 and the connection terminals 4a attached to the tip of the harness 4 are made of the resin 12 made of "epoxy resin", and the holding portions 8c, 11c of the frame members 8, 11 are formed. After being adhered to the structure 1, the structure 1 is further fixed by the molten resin 17, so that the structure 1 is completely shielded from the outside air, the deterioration of the contact quality between the two can be prevented, and the poor contact can be avoided.

Further, the plurality of bus bars 6, 10, 1
Since the end portions 6b, 10b, 15b, 16b of 5, 16 and the connection terminals 4a attached to the front end of the harness 4 are fitted, a smaller space is required as compared with the case of connecting the connectors, and the wiring structure The degree of integration of the body 1 can be increased, and downsizing is possible.

Further, a plurality of bus bars 6, 10, 15, 1
6 is connected to the harness 4 side between the units 7, 9 and 13 and 14, which are superimposed on each other, to the bus bars 6, 10, and 1 extending to the centralized connectors 2, 3.
Since the lengths of the harnesses 5 and 16 are different from each other, the harnesses 4 can be prevented from overlapping each other on a plane, so that it is possible to easily determine an electronic device to be a target at the time of wiring work and to improve wiring workability.

FIGS. 4 to 7 show a method of manufacturing the wiring structure 1 of the present invention, FIGS. 4 and 5 show a primary molded body A of the wiring structure 1, and FIG. 6 shows a harness to be assembled. Shows an assembly drawing of the primary molded body A of the wiring structure 1, and the secondary molded body B
(Completed product) is shown in FIG. Note that the same parts as those in FIGS.

The primary molded body A shown in FIGS. 4 and 5 is melted into an injection mold having a molding space crossing the bus bar 6 while holding a plurality of "L" -shaped bus bars 6 without contact. A resin (for example, nylon 66 or nylon 6) is injected to perform resin molding to form a primary molded body A.

In the illustrated example, the molding space forms a lattice-shaped frame 8 and forms a vertical beam 8a for holding a bus bar 6 (6a) extending toward the centralized connector 2 in the vertical space, and forms a vertical beam in the horizontal space. The primary molded body A forms the cross beam 8b that holds the bus bar 6 (6b) extending to the harness 4 side. The vertical beams 8a and the horizontal beams 8b prevent the bus bars 6 from contacting each other.

The primary molded body A is provided with a holding portion 8c surrounding the front end of the bus bar 6b extending toward the harness 4 from three sides, and the front end of the bus bar 6b projects into the groove of the holding portion 8c.

In the primary molded body A, the middle part of each bus bar 6 is exposed, and goes around the frame 8 of the primary molded body A to form a secondary molded body B as described later. The melted resin (for example, nylon 66) 17 is directly in contact with and cast.

Further, a harness 4 previously shown in FIG. 6 having a connector 4b connected to an externally mounted electronic component at one end and a connection terminal 4a for receiving the end 6b of the bus bar 6 at the other end. Are prepared according to the external electronic components. The harness 4 may be a bundle of lead wires required for the target electronic component. In this case, connection terminals 4a and connector 4b terminals corresponding to the number of lead wires are prepared. You.

Next, as shown in FIG. 7, the connection terminal 4a of the prepared harness 4 is fitted to the end 6b of the corresponding bus bar 6.

At the time of this fitting, since a groove is formed in the holding portion 8c of the primary molded body A of the wiring structure 1, the harness 4
The workability when fitting the connection terminal 4a at the tip to the tip of the bus bar 6 is not hindered.

By the fitting operation, the connection portion and the harness (lead wire) connected to the connection portion are formed in the groove of the holding portion 8c.
4 is located.

Next, a resin 12 made of epoxy resin is poured into the groove, and the resin 12 is filled around the connection portion, around the end of the bus bar 6b, around the end of the harness (lead wire) 4, and in the gap.

The resin 12 is hardened to form a connection portion and a harness (lead wire) on the holding portion 8c of the primary molded body A.
4 are integrally fixed, and the contact positional relationship between the end of the bus bar 6b and the connection terminal 4a is fixed.

The primary molded article A with the harness 4 is, for example, a primary molded article for holding another bus bar when the number of electronic devices of the external arrangement to be handled cannot be accommodated by one primary molded article A. The main body is formed, the primary molded bodies are superimposed on each other, and the electronic equipment of the external arrangement to be targeted is assigned as a two-stage structure.

Further, when the primary molded body with the harness 4 cannot cover the number of electronic devices of the external arrangement to be covered by the two stages, for example, a resin mold is formed on the head cover to arrange the harness of the automobile engine. In this case, three or four types of primary molded bodies with harnesses are manufactured by the above-described manufacturing method so that harnesses to the electronic components are taken out from the left and right side surfaces of the head cover.

In this case, in the primary molded body with the harness which is paired up and down, it is complicated to determine the target electronic device at the time of work because it is complicated to draw out the harness 4 from the same upper and lower ranges. The bus bars are formed with different lengths so as to shift the position ranges from which the bus bars are drawn.

Next, as shown in FIG. 1, an object, for example, the primary molded article A with the harness manufactured according to the type of the engine is positioned in a head cover mold if the object is an engine. Then, a molten resin (eg, nylon 66, nylon 6) 17 is integrally molded by injection molding to obtain a secondary molded body B.

The molding die holds the tip of the bus bar 6a on the centralized connector 2 side, is provided with another positioning means so that the primary molded body A with the harness does not move due to the flow of the molten resin, and extends from the holding portion 8c. The harness 4 is not affected by the heat of the molten resin.

By the injection molding, the molten resin 17 fills around the primary molded body A, enters the space around the bus bar 6 of the primary molded body A, and flows around the holding portion 8c.

Accordingly, the molten resin 17 of the secondary molded body B
Is also wrapped around the bus bar 6 exposed in the primary molded body A, so that it is firmly integrated with the primary molded body A.

The holding portion 8c and the cured resin 12 in the holding portion 8c protect the connection portion and the harness 4 connected to the connection terminal 4a from the flow of the molten resin 17,
The connection portion is prevented from coming off and the coating of the harness 4 is prevented from being damaged.

At the same time, the molten resin 17 surrounding the holding portion 8c, after curing, further seals a part of the harness 4 connected to the connection portion and the connection terminal 4a from the outside air, protects them, and firmly holds them.

In the secondary molding step, the primary molded body A
The same molten resin as the resin used for the frame 8 of
By using the same material, the mechanical properties of the secondary molded body B (finished product) become uniform, quality can be easily maintained, reliability can be improved, and productivity can be improved by using the same material. .

The method of manufacturing the wiring structure 1 according to the present embodiment can provide the following effects.

First, the harness 4 is connected to the distal end of the bus bar 6 of the primary molded body A by the connection terminal 4a, and thereafter, the connection state is maintained, and the resin 12 is resin-molded and integrated to form the secondary molded body B in this state. Since the wiring structure is further covered with the molten resin 17, the wiring structure can be integrated during the manufacturing process and the manufacturing process can be simplified as compared with the case where the harness is connected and the connection portion is resin-molded after completion of the wiring structure. .

Since the bus bar 6 is partially exposed when the bus bar 6 is held in contact with the primary molded body A without contact, the molten resin 17 during the secondary molding is exposed to the bus bar 6. By hardening around the part, it can be firmly combined with the primary molded body.

Further, since the connecting portion between the connecting terminal 4a of the harness 4 and the bus bar 6 is formed to be surrounded by the holding portion having the groove of the primary molded body A, the connecting portion is filled and sealed with the mold resin. It can be easily performed and the workability at that time is good.

When the secondary molded body B is injection molded, the resin 1
2 can also be prevented from being damaged.

In the above embodiment, the wiring structure 1 is described as a flat wiring body. However, by forming a resin molded body such as a cylinder head cover (rocker cover) as a secondary molded body, these parts can be formed. A primary molded body, a bus bar, a harness connection terminal and the like may be incorporated therein, and such a thing is also included in the right of the present invention.

[Brief description of the drawings]

FIG. 1 is a plan view of a wiring structure according to an embodiment of the present invention.

FIG. 2 is a side view of the same.

FIG. 3 is a partially enlarged view showing a part of the same.

FIG. 4 is a plan view of a primary molded body of the wiring structure of the present invention.

FIG. 5 is a side view of a primary molded body of the wiring structure of FIG. 4;

FIG. 6 is an example of a harness, in which A is a side view showing the entirety, and B is a front view showing a partly enlarged view.

FIG. 7 is an assembled state diagram of a harness to a primary molded body.

[Explanation of symbols]

 A Primary molded body B Secondary molded body 1 Wiring structure 2, 3 Centralized connector 4, 5 Harness 4a Connection terminal 4b Connector 6, 10, 15, 16 Bus bar 7, 9, 13, 14 Unit 8, 11 Frame 12 Mold Resin 17 Melted resin

Continued on the front page (51) Int.Cl. ⁷ Identification code FI Theme coat II (Reference) H05K 7/06 H02G 3/28 F (72) Inventor Katsuharu 2 Takaracho, Kanagawa-ku, Yokohama-shi, Kanagawa Nissan Motor Co., Ltd. (72) Inventor Seiji Tani 591 Shimo-Akasaka, Kawagoe-shi, Saitama Tenex, Inc. GA00 HA13 5G361 BA03 BA06 BB01 BC01 5G363 AA16 BA02 DC02

Claims (6)

[Claims] 1. A plurality of bus bars held apart from each other, a centralized connector having one end of the bus bar as a terminal, and a peripheral electronic device connected to the other end of the bus bar via a connection terminal. A wiring structure, comprising: a harness including a connector for connecting to a device; a bus bar, a centralized connector, and a resin molded body integrally formed by covering the periphery of a connection terminal of the harness with a resin. 2. A frame for holding the plurality of bus bars in a state of being separated from each other, comprising a holding portion surrounding at least two sides of a connection portion between a bus bar and a connection terminal of a harness, wherein the connection portion is held. The wiring structure according to claim 1, wherein the wiring structure is integrated with the portion by a resin mold. 3. The length of a portion of the bus bar held by the frame body extending to the centralized connector is different from the length of a portion of the bus bar held by the adjacent frame bodies extending to the centralized connector. The wiring structure according to claim 2, wherein: 4. A plurality of bus bars are separated from each other by a molten resin and fixed together to form a primary molded body, and a connector for connecting to peripheral electronic equipment is provided at one end of the bus bar of the primary molded body. While connecting the connection terminals of the harness, the periphery of the connection portion is covered with a mold resin to be integrally fixed to the primary molded body, and then the primary molded body is covered with the resin constituting the structure including the connection portion. A method of manufacturing a wiring structure, wherein a secondary molded body forming a centralized connector is obtained at the other end of a bus bar by integrally molding. 5. The primary molded body is formed by exposing a part of a bus bar to the outside, and an exposed portion of the bus bar is covered with a resin forming a secondary molded body. A method for manufacturing the wiring structure according to the above. 6. The primary molded body has a holding portion that partially surrounds the connection portion, and the molding resin fixes the connection portion in the holding portion, and the fixed portion constitutes a secondary molded body. 5. A resin coated with a resin.
A method for manufacturing the wiring structure according to claim 5.