JPH05120922A - Wire harness - Google Patents

Abstract

PURPOSE:To improve the circuit formability of a wire harness used for electric machinery and apparatus, and the like, and to reduce forming cost. CONSTITUTION:On an insulating film 9, conductors 8 are arranged on a wiring circuit having bending portions, curved portions, or branching portions, crossing portions freely. A main circuit portion 1 is composed of 'a conductor wiring circuit board 3 on the insulating film', which is made by coating and covering the conductors 8 with another insulating film 12, and a connection portion 14B is to be connected to the connection portion 14A of the main circuit portion 1. A branching connection portion 2, which is composed of a printed wiring board 4, putting leading wires 5 in connection, is also connected thereto and combined so as to form a wire harness.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to electric wiring for copiers (PPCs), personal computers (PCs), facsimiles, video tape recorders, video cameras, etc., and electrical wiring for office automation equipment, or automobile instrument panel parts. The present invention relates to a wire harness used for the electric wiring.

[0002]

2. Description of the Related Art A wire harness for electric appliances and office automation equipment is a flexible flat printed wiring board (hereinafter, referred to as a flexible flat printed wiring board) in which a conductor circuit is printed on a resin film base film. A plate using an FPC) is known, and a wire harness using this FPC is provided with dense circuits to make it compact and compact, and it is easy to form a circuit according to the arrangement of connectors to be connected. Have advantages.

[0003]

However, since the FPC used for the wire harness requires an etching process or the like, when the FPC is formed in multiple layers in the case of forming a complicated conductor circuit, the etching process of the front surface and the back surface is required. As a result, the machining process becomes complicated, and the cost increases due to the complication.
Furthermore, since there is no part that can be standardized and shared between different circuit groups in terms of structure, it is inferior in adaptability to circuit changes and
The entire wire harness is individually manufactured, which increases the cost.

[0004]

The wire harness of the present invention for solving the above technical problems is described as follows: "A conductor is disposed on an insulating film to form a wiring circuit, and at least an upper half portion of the conductor is formed. The exposed portion of the main circuit part consisting of a "conductor wiring circuit board on an insulating film", which is covered with a flexible insulating material, and the conductor of the main circuit part are electrically connected to the conductive path to connect to the main circuit part. And a combined structure of connection with a branch connecting portion made of a printed wiring board for connecting the taken-out electric wire ".

Specifically, the above-mentioned "insulated conductor wiring circuit board on an insulating film" has a thickness of 1 as an insulating film.
0-500 micron polyethylene terephthalate (P
ET), polyvinyl chloride (PVC), polyimide (P
I). Polyphenylene sulfide (PPS) or the like is used, and 0.03 to 1.
Zero-diameter annealed copper wire, annealed copper-tin plated wire, other plated wires, copper alloy wire, clad wire that combines different metals, or stranded wire in which multiple single wires such as these are stranded, or insulated An insulated conductive wire (for example, a magnet wire or the like) that has been subjected to the above is used, and a required main circuit is formed on the insulating film by being flexibly / curved or branched / intersectingly arranged.

When a bare wire conductor is used, in order to insulate the exposed portion of the conductor disposed on the insulating film, an insulating resin is coated on the conductor on the insulating film, The same insulating film as the above-mentioned insulating film is overcoated and covered, or the insulating film is laminated with an adhesive resin or an adhesive resin to cover the exposed part of the upper half of the conductor. .

The printed wiring board to be connected to the "insulated conductor wiring circuit board on the insulating film" is a known printed wiring board on a hard / semi-rigid board or a known flexible printed wiring board. Is used, and the conductor of the connecting portion formed on both of them and the conductive path of the printed wiring board are connected and conducted by a mechanical bonding means, a bonding / adhering means such as soldering, or a welding means by heating. Then, a flat parallel electric wire (ribbon cord or the like) having a connector is provided on the printed wiring board by soldering connection of connector pins or welding means by heating.
The circuit group of the main circuit part consisting of the "insulated conductor wiring circuit board on the insulating film", which has the required main circuit of the wire harness connected to the extracted electric wire group consisting of normal electric wires, is connected to the printed wiring board. It has a structure in which a wire harness having a required circuit is configured by conducting connection with a group of extraction electric wires connected to the device side through a branch connection portion.

[0008]

According to the wire harness of the present invention having the above structure, the main circuit portion of the "insulated conductor wiring circuit board on the insulating film" having the main circuit of the wire harness and the branch connection of the printed wiring board having the taken-out electric wire group are connected. Since it has a combined structure of connecting parts and parts, it is possible to secure the merits of facilitating circuit formation and downsizing and compacting of the wire harness. Further, since it is possible to deal with the circuit change of the wire harness by changing the change of only the main circuit part, it is possible to quickly and easily cope with the circuit change of the wire harness, and the branch connection part is shared between different main circuit parts. Standardization for standardization becomes possible.

Furthermore, the "insulated conductor wiring circuit board on the insulating film" forming the main circuit portion can have a multilayer structure as it is (no etching process is required), and a crossed arrangement of insulated conductors is possible. The degree of freedom in forming the circuit of the density circuit is improved, and the circuit can be easily formed.

[0010]

Embodiments will be described in detail below based on embodiments. First, with reference to FIG. 1 showing the configuration of the wire harness of the first embodiment of the present invention, the wire harness of the present invention is described as follows: "Insulated conductor wiring circuit board 3 on an insulating film (hereinafter, simply referred to as insulated conductor circuit board 3). ) And a printed circuit board 4 connected to the main circuit section 1 and a branch connection section 2 to which a required take-out electric wire 5 is connected, and is formed in the main circuit section 1. The main circuit 7 is drawn out to the extraction electric wire 5 through the branch connection portion 2 and connected to the device side.

More specifically, the insulated conductor circuit board 3 is shown in FIG.
For reference, on a 25-micron-thick polyethylene terephthalate (hereinafter referred to as PET) film insulating film 9 having a 40-micron adhesive layer 10, a tin-plated annealed copper conductor 8 having a diameter of 0.1 μm is used. The main circuit 7 is formed so that it can be bent, bent, and branched freely, and an insulating film 12 of a 25-millon PET film having a 40-micron-thick thermoplastic adhesive layer 11 is overcoated thereon. While covering and insulating the upper exposed portion of the conductor 8, the polymerized insulating films 9 and 12 are cut along the contour of the circuit formed by the conductor 8 to adjust the shape, and the insulating film 9 is provided on one side edge. The connection portion 14A is formed by exposing the end portions of the conductors 8 closely arranged. The conductors 8 are arranged at a fine pitch such as 0.5 / 0.8 / 1.0 / 1.2.

Further, the conductor 8 of the insulated conductor circuit board 3
5 and 6, according to the form of the main circuit 7 to be formed, the insulating film 9 can be freely bent or curved, and the contour of the insulating film 9 can be freely branched or branched. As illustrated, the middles of the conductors 8 are soldered or conductively connected by any welding means, and wiring is provided by providing branch portions 13 such as parallel intersections and cross intersections.

On the other hand, the printed wiring board 4 forming the branch connection portion 2
Referring to FIG. 1, a rectangular plate having a required conductive path (not shown) is printed on the back surface of the hard substrate 15, and conductive path end portions 16 are arranged at a fine pitch along one side edge thereof. The connecting portion 14B is formed, and the connecting portion 14B is formed.
When the connection portion 14A of the insulated conductor circuit board 3 is superposed, the conductor 8 and the end portion 16 of the conductive path are connected and conducted.
In addition, in the connection of the connecting portions 14A and 14B in this embodiment, the reinforcing plate 17 is applied to the lower side of the insulated conductor circuit board 3, and the insulated conductor circuit board 3 is mechanically sandwiched by the reinforcing plate 17 and the printed wiring board 4. It is tightly attached and is fixed by the mounting bolt 18.

Further, a connector pin insertion hole 19 is provided at a predetermined position in the branch connection portion 2, and the connector pin 21 of the connector 20 of the take-out electric wire 5 is inserted into the insertion hole 19 as shown in FIG. And the conductive path 22 is connected by soldering. The take-out electric wire 5 of this embodiment is a plate-like parallel electric wire in which thin electric wires are arranged in parallel at a fine pitch and connectors 20 are provided at both ends.

Next, changes and modes of the present invention will be described. That is, referring to FIG. 7, the main circuit group 1, the branch connecting portions 2 and the lead-out electric wires 5 which constitute the main portion of the wire harness of the present invention are not limited to the above-mentioned embodiment, and a single branch connecting portion 2 has a plurality of main portions. Circuit part 1 is connected, or connection part 14A
The main circuit section 1 in which the branch connection section 2 is connected to the other connection section 1
4C is provided to connect to another branch connection part 2A or another extraction electric wire, or, although not shown, the branch connection part 2
There is a change such as connecting the main circuit portion 1 to the connection portion at the central position of.

Next, another embodiment of the insulated conductor circuit board 3 will be described with reference to FIG. That is, in FIG. 8, the conductor 8 of the polyurethane insulated magnet wire is formed on the polyimide (PI) insulating film 9 having the adhesive layer 10.
And a polyimide (P
The insulating film 12 of I) is overcoated. Since the conductor 8 of this embodiment is an insulated conductor, the conductors can intersect on the same insulating film 9. The use of this insulated conductor crossing improves the degree of freedom in circuit design of the main circuit board 1.

On the other hand, as means for connecting the main circuit board 1 and the branch connecting portion 2 to each other as shown in FIG. 9, as a means other than the embodiment shown in FIG.
1 is soldered to the conductive path 22 on the back side, and the connector 20
In some cases, the connection portion 14A of the main circuit board 1 may be inserted and connected, or the connection portion 14A of the main circuit portion 1 and the connection portion 14B of the branch connection portion 2 may be overlapped and soldered and connected.

[0018]

As described above, the wire harness of the present invention is composed of the main circuit portion including the "insulated conductor wiring circuit board on the insulating film" having the main circuit, and the printed wiring board having the extraction electric wire. Since it is characterized by the combination of the connection with the branch connection portion, the crossing of the circuit and the multi-layering are facilitated, the moldability of the circuit is excellent, and the etching process of the circuit board is not necessary. And since it is possible to freely exchange only the main circuit part that shares the branch connection part, it is possible to quickly and inexpensively respond to the circuit change of the wire harness,
Due to the standard mass production of the common branch connection portion and the moldability without an etching step, there are effects such as reduction of the molding cost of the wire harness.

[Brief description of drawings]

FIG. 1 is a perspective view showing a structure of a wire harness according to a first embodiment of the present invention.

FIG. 2 is a partial plan view of an “insulated conductor wiring circuit board on an insulating film” in FIG. 1 embodiment.

FIG. 3 is a partial sectional view of an “insulated conductor wiring circuit board on an insulating film” of FIG. 1 embodiment.

FIG. 4 is a side view showing a connection state between the printed wiring board and the taken-out electric wire in the embodiment of FIG.

FIG. 5 is a plan view of another embodiment of the “insulated conductor wiring circuit board on the insulating film” of FIG. 1 embodiment.

FIG. 6 is a plan view showing the wiring form of the conductor of the “insulated conductor wiring circuit board on the insulating film” of the embodiment of FIG. 1;

FIG. 7 is a perspective view showing a wire harness according to another embodiment of the present invention.

FIG. 8 is a sectional view of an “insulated conductor wiring circuit board on an insulating film” according to another embodiment of the present invention.

FIG. 9 is a side view showing the connecting means between the “insulated conductor wiring circuit board on the insulating film” and the printed wiring board according to another embodiment of the present invention.

[Explanation of symbols]

 1 Main Circuit Part 2 Branch Connection Part 3 Insulated Conductor Wiring Circuit Board on Insulating Film 4 Printed Wiring Board 5 Taken Out Electric Wire 7 Main Circuit 8 Conductor 9 ・ 12 Insulating Film 10 Adhesive Layer 11 Adhesive Layer 13 Branch Part 14 Connection Part 15 Board 16 Conductive path end 19 Insertion hole 20 Connector 21 Connector pin 22 Conductive path

Claims (4)

[Claims] 1. A "on an insulating film" in which a conductor is disposed on an insulating film to form a wiring circuit, and at least an exposed portion of the upper half of the conductor is covered with a flexible insulating material. Main circuit part consisting of an insulated conductor wiring circuit board ", and a branch connection part consisting of a printed wiring board which is connected to the main circuit part by conducting a conductive path with the conductor of the main circuit part and which connects a take-out electric wire. A wire harness characterized by a combined structure of connection with and. 2. The wire harness according to claim 1, comprising an "insulated conductor wiring circuit board on an insulating film" in which a circuit is formed by arranging conductors so that they can be bent / curved or intersected / branched. 3. The wire harness according to claim 1, wherein the take-out electric wire is formed by a plate-shaped parallel electric wire in which the electric wires are arranged in parallel. 4. The wire harness according to claim 1, which comprises an "insulated conductor wiring circuit board on an insulating film" in which a circuit is formed of an insulating coated conductor.