JPH0787050B2 - High density flat circuit body and manufacturing method thereof - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a high-density flat circuit body in which the circuit density of the flat circuit body is increased and the terminal connection portion is prevented from being enlarged, and a manufacturing method thereof. .

[Conventional technology]

FIG. 9 (a) is a front view showing a conventional flat circuit body,
(B) is a DD sectional view of (a).

The flat circuit body 28, with respect to the insulating substrate 29, the adhesive 30 is interposed, a plurality of covered electric wires 31 such as a polyester wire shown in FIG. A connecting plate portion 29 which is formed by widening and forming a fan shape at the end of the insulating substrate 29.
With respect to a, the terminal conductor portions 32 of the covered electric wire 31 are arranged and fixed at intervals.

That is, as shown in the intermediate manufacturing process of the flat circuit body 28 in FIG. 11, the covered electric wire 31 is arranged on the insulating substrate 29, and the connecting plate portion 29a is cut from the central portion of the connecting plate portion 29a. The coating 33 of the terminal portion 31a of the coated electric wire 31 is dissolved by using a solvent or the like to expose the conductor portion 32, so that the flat circuit body 28 shown in FIG. 9 is obtained. Then, a mating connector (not shown) is coupled to the terminal connecting portion 34 to make an electrical connection.

However, in the above-mentioned conventional structure, in order to prevent a short circuit between the adjacent terminal conductors 32, the terminal conductors 32 of the covered electric wire 31 must be spread in a substantially fan shape and arranged, There has been a problem that the connecting portion 34 is enlarged, the mating connector is also enlarged, and a large connecting space is required.

[Problems to be Solved by the Invention]

The present invention has been made in view of the above points, and an object thereof is to provide a high-density flat circuit body that prevents the terminal connection portion from being enlarged due to a high-density circuit, and a method for manufacturing the same.

[Means for Solving the Problems]

In order to achieve the above-mentioned object, the present invention is arranged in the end portions of a plurality of covered electric wires closely in parallel, each reinforcing plate piece having a plurality of parallel electric wire guide grooves on the front and back surfaces, and each electric wire guide groove. An end conductor portion of the covered electric wire that is routed and protrudes in the electric wire radial direction from the electric wire guide groove, and an opening for the front and back surfaces of the reinforcing plate piece are provided, and the plurality of covered electric wires are closely attached to each other through the opening. A high-density flat circuit body composed of upper and lower insulating sheets exposing the terminal conductor portion is adopted. In the above circuit body, the reinforcing plate piece is adhered to a band-shaped adhesive material, and the end portions of the plurality of covered electric wires are arranged in parallel in the electric wire guide grooves on the front and back sides of the reinforcing plate piece. A strip-shaped upper and lower insulating sheet having an exposed window on the back surface is adhered to the plurality of covered electric wires, the insulating sheet and the covered electric wire are cut in a direction orthogonal to the reinforcing plate piece, and the covered electric wire is cut in the exposed window. It is manufactured by a method of exposing the terminal conductor portion.

[Action]

The end portions of the plurality of covered electric wires are distributed on the front and back sides of the reinforcing plate piece and are positioned by the electric wire guide grooves. The terminal conductor portion of the electric wire is exposed on the reinforcing plate piece and can contact the terminal of the mating connector. Since the end portions of the covered electric wire are distributed to the front and back of the reinforcing plate piece, the wiring density of the end portion is smaller than the wiring density of a plurality of covered electric wires closely in parallel, and the width of the reinforcing plate piece is It can be set equal to the installation width.

〔Example〕

FIG. 1 is a partially cutaway perspective view showing an embodiment of a high-density flat circuit body according to the present invention.

In the flat circuit body 1, a plurality of covered electric wires 2 and 2'are closely adhered in parallel (in a row) with an adhesive material to be bundled, and the end conductor portions 3 and 3'of the plurality of covered electric wires 2 and 2'are bundled. The reinforcing plate pieces 4 are alternately separated from each other on the front and back sides and arranged with a space between adjacent terminal conductor portions 3 (3 '), and the covered conductors 2 and 2'are connected to each other by terminal conductors. The insulating sheets 6 and 6 having the openings 5 and 5 for exposing the portions 3 and 3'are attached.

Here, the reinforcing plate piece 4 is shown in a perspective view in FIG.
As shown in the sectional view AA of (a) in (b), a plurality of electric wire guide grooves 8, 8 ′ are provided on the front and back surfaces of an insulating synthetic resin plate 7 such as acrylic resin, and the synthetic resin plate 7 is provided. It is formed by forming wedge-shaped inclined surfaces 9 and 10 at one end (rear end) and both end portions of the electric wire guide groove 8 on the front and back surfaces as shown in FIG. 2 (c). 8'is inclined along the inclined surface 9 and reaches the apex 9a. Therefore, the covered electric wires 2, 2 ′ bundled in a line can be smoothly routed to the reinforcing plate piece 4, and the insulating sheets 6, 6 are adhered and adhered to the peripheral edge of the reinforcing plate piece 4. Can be made.

It should be noted that, as shown in FIG. 3 in another row (cross-sectional view) of the reinforcing plate pieces, the above-mentioned inclined surfaces 10, 10 at both ends are not always necessary, and rather, in the sense that the width dimension can be reduced,
It is better not to have an inclined surface like the reinforcing plate piece 4'in the figure, but to have only the vertical surfaces 11 and 11. Further, it is possible without the wire guide grooves 8 and 8 '.

FIG. 4 is an explanatory view showing a method of manufacturing the high-density flat circuit body as described above.

In the figure, 12 is a strip-shaped thermoplastic adhesive material, 14 is a reinforcing plate piece material, 13 and 13 'are covered electric wires, and 15 is an insulating sheet,
The reinforcing plate piece material 14 is adhesively arranged at a predetermined interval with respect to the belt-shaped adhesive material 12 delivered from the roller 16, and further, a plurality of covered electric wires 13 and 13 'are opposed to each other from both front and back sides of the adhesive material 12. The rollers 17 and 17, and the adhesive 12 and the reinforcing plate piece 14
Adhere to both sides of. Further, from thereabove, the insulating sheets 15 and 15 such as PET having the terminal exposure window 18 shown in FIG.
It is sent out with 34, 34 and adhered, and it is put on a hot roll 19.

Since the band-shaped adhesive material 12 has extensibility here,
As shown in FIGS. (A) and (b), the plurality of covered electric wires 13 and 13 'adhered to the front and back surfaces of the adhesive material 12 are aligned and fixed in a line. Further, an adhesive is applied to the front and back surfaces of the reinforcing plate piece material 14 in advance, and as shown in FIG.
For the wire guide grooves 8 and 8'on the front and back of 14,
3'is fitted and attached.

As shown in FIG. 7, the reinforcing plate piece material 14 is a synthetic resin plate 21.
On the other hand, with the wire guide grooves 8 and 8'on the front and back,
The front and rear end portions are formed with wedge-shaped inclined surfaces 9 and 9, and the reinforcing plate piece member 14 is provided with a central portion m (C-C in FIG. 6A).
By cutting with the cutter 22 shown in FIG.
The reinforcing plate pieces 4, 4 of each terminal shown in FIGS. 1 and 2 are obtained. In FIG. 4, 23 is a guide roller and 24 is
The flat circuit body cut by the cutter 22 is shown. And
In the final step, the electric wire coating on the electric wire end portion 25 is removed by using a solvent or the like to expose the conductor portions 3, 3 '(see FIG. 1).

FIG. 8 shows a manufacturing method in which the reinforcing plate piece 4 shown in FIG. 2, that is, the reinforcing plate piece material 14 shown in FIG. It is shown.

That is, the pair of reinforcing plate pieces 4, 4 in the longitudinal direction of the adhesive,
The inclined surfaces 9 and 9 are provided outwardly and closely arranged, and the two cutters 26 and 26 installed close to each other cover the electric wires along the end surfaces 27 and 27 of the respective reinforcing plate pieces 9 and 9. The 13,13 'and insulating sheets 15,15 are cut. According to this manufacturing method, since it is not necessary to cut the reinforcing plate piece material 14, the life of the cutter 26 is extended, and a stable cut surface can be obtained.

〔The invention's effect〕

As described above, according to the present invention, since the terminal portions of the plurality of covered electric wires are distributed to the front and back sides of the reinforcing plate piece, the terminal connection portion is prevented from being enlarged, and the mating connector is downsized accordingly. The space required for connection can be kept small. Further, since the end portion of the covered electric wire is stably supported along the electric wire guide groove of the reinforcing plate piece, smooth, quick and reliable electrical connection with the mating connector can be achieved.

[Brief description of drawings]

FIG. 1 is a partially cutaway perspective view showing a high-density flat circuit body of the present invention, FIG. 2 (a) is a perspective view showing a reinforcing plate piece thereof, (b) is a sectional view taken along line AA of (a), (C) is a sectional view taken along the line A'-A 'of (a), FIG. 3 is a sectional view showing another example of the reinforcing plate piece, FIG. 4 is an explanatory view showing the manufacturing method of the present invention, and FIG. 6A is a perspective view showing an insulating sheet, FIG. 6A is a front view showing a high-density flat circuit body in the process of manufacturing, FIG. 6B is a sectional view taken along line BB in FIG. 6A, and FIG. -C sectional view, FIG. 7 is a perspective view showing the reinforcing plate piece material, FIG. 8 is an explanatory view showing a manufacturing method using the reinforcing plate piece of FIG. 2, and FIG. 9 (a) is a conventional flat plate. Front view showing the circuit body,
(B) is a D-D sectional view of (a), FIG. 10 is a perspective view showing a covered electric wire, and FIG. 1 ... High-density flat circuit body, 2,2 ', 13,13' ... Coated electric wire, 3,3 ', ... Terminal conductor part, 4,4', ... Reinforcing plate piece,
12 …… Adhesive material, 14 …… Reinforcing plate piece material, 15 …… Insulation sheet,
18 …… Terminal exposure window.

Claims (2)

[Claims] 1. A reinforcing plate piece which is arranged at the end portions of a plurality of covered electric wires closely in parallel and which has a plurality of parallel electric wire guide grooves on the front and back surfaces, and which is arranged in each electric wire guide groove. A terminal conductor portion of the covered electric wire protruding from the groove in the radial direction of the wire, and openings for the front and back surfaces of the reinforcing plate piece, which are in close contact with the plurality of covered electric wires and expose the terminal conductor portion from the openings. A high-density flat circuit body characterized by being constituted by an insulating sheet of. 2. A reinforcing plate piece is adhered to a band-shaped adhesive material, and terminal portions of a plurality of covered electric wires are arranged in parallel in electric wire guide grooves on the front and back sides of the reinforcing plate piece to form a front surface of the reinforcing plate piece. A strip-shaped upper and lower insulating sheet having an exposed window on the back surface is adhered to the plurality of covered electric wires, the insulating sheet and the covered electric wire are cut in a direction orthogonal to the reinforcing plate piece, and the covered electric wire is cut in the exposed window. A method for manufacturing a high-density flat circuit body, which comprises exposing a terminal conductor portion.