JPH0693330B2 - Flat multi-core electric wire and its forming method - Google Patents

Description

TECHNICAL FIELD The present invention relates to a flat type multi-core electric wire used for wiring between flexible printed wiring boards, etc., and a method for forming the electric wire. The present invention relates to an end structure of a multi-core electric wire and a method of forming the end.

"Prior Art" Flat type multi-core electric wire is disclosed in Japanese Utility Model Publication No. Sho 63-196517 and Utility Model Sho 63-
There are many publicly known examples such as Japanese Patent No. 194413. To summarize these, as shown in FIG. 3, the round electric wires 1 are arranged in a parallel plate shape at a required interval and the coating of the end portions is peeled off. The exposed conductor 2 (hereinafter referred to simply as conductor 2) is exposed.
The connection tape 5 is affixed from above and below to the covering portion of the round electric wire group 1 along the base part of (1) to fix the parallel posture of the electric wire group, and to make the conductor 2 the contact portion 3 to the other side. In order to prevent bending of the conductor 2 of the third known example shown in FIG. 3, a sheath body 7 for collectively holding a conductor group is provided in the middle of the conductor 2 as shown in FIG. There is.

[Problems to be Solved by the Invention] Among the above-mentioned conventional flat type multi-core electric wires, the former one shown in the third illustration has insufficient rigidity of the conductor 2 protruding in a cantilever manner, so that insertion of a connector The conductor 2 is apt to "bend or bend" due to resistance, and in order to replenish the lack of rigidity thereof, the twisted wire is unsuitable for use due to its structure limited to tin-coated wire or single wire. The flexibility of the entire electric wire is poor, and there is a problem that it is not suitable for connection in a bent posture or for movable wiring in which the middle of the wiring is repeatedly bent. Further, although the fourth shown in the drawing intended to improve the rigidity of the conductor 2 prevents the above-mentioned "bend / bend", it is inserted into the connector together with the sheath body 7, so that the insertion force is increased and the workability is remarkably increased. descend.

The present invention provides a flat-type multi-core electric wire that solves the above-mentioned problems of the prior art, and a molding method thereof.

"Means for Solving the Problems" The present invention for solving the above technical problems "refers to FIG. 1 showing a basic configuration, in which a group of round electric wires is arranged in parallel in a plane at a predetermined interval. At the same time, the exposed conductor 2 peeled off by aligning the coating 4 having a little length at the end is contacted 3
In the flat type multi-core electric wire, the common cover connecting tape 5 is attached to the upper and lower surfaces of the cover 4 near the base end of the exposed conductor 2 with a slight length, and the lower surface of the exposed conductor 2 is covered and connected. "A flat multicore electric wire characterized by an end structure in which a conductor connecting tape 6 separated from the tape 5 is adhered", and "a molding procedure for molding the flat multicore electric wire of the present invention" Referring to FIGS. 2A, 2E, 2B, 2F, 2C, 2G, and 3D in sequence, the upper and lower surfaces of the coating 4 at the end of the round electric wire 1 group Then, a common covering tape 5 with a little length is attached, and the "covering connecting tape 5 and the applied covering 4" are integrated and divided into a front half 5A and a rear half 5B, and the front half 5A is slid forward. The exposed conductor 2 is shown between the front half 5A and the rear half 5B, and the common conductor connecting tape 6 is connected to the lower surface of the exposed conductor 2 by covering the rear half 5B. After adhered, accordingly separated from the-loop 5, and cut off the front half portion 5A, a second
As shown in FIGS. 3D and 3H, the exposed conductor 2 projecting forward is used as the contact portion 3 to form a flat multicore electric wire.

The front half 5A and the rear half 5B are divided by a known means for stripping the electric wire coating, and the front half 5A is divided.
The exposed conductor 2 is exposed by sliding only a small amount forward. Also, the split ratio of the first half 5A and the second half 5B does not necessarily have to be split in half.
5A may be the size of the front half 5A sufficient to maintain the aligned posture of the exposed conductor 2.

"Operation" In the round multicore electric wire having the above end structure, the round electric wires 1 group in the vicinity of the exposed conductor 2 are connected and fixed by sandwiching and sticking the covering connecting tape 5, and the lower surface of the exposed conductor 2 is Since the separate conductor connecting tape 6 separated from the cover connecting tape 5 is attached and connected and held, the mechanical stability of the alignment posture of the round electric wire 1 group at the base end of the exposed conductor 2 and the exposed conductor 2 itself. The exposed connecting conductor 2, that is, the contact portion 3 does not cause "posture collapse / bend / bend" even when receiving resistance to be inserted into the connector, and the covering connecting tape 5 and the conductor connecting tape 5 functioning to stabilize these postures. Since 6 and 6 have the above-mentioned separated structure,
The bending flexibility of the proximal end of the exposed conductor 2 is appropriately retained, and insertion into the connector becomes easier and more accurate.

Further, since the stranded wire conductor can be adopted by improving the stability of the contact portion 3, the flexibility of the whole flat multicore electric wire including the contact portion 3 is improved.

Further, according to the above-described molding method of the present invention, the cover connecting tape 5 attached to the upper and lower sides of the end cover 4 is divided into the front half 5A and the rear half 5B while being integrated with the adhered cover 4. , The front half 5A is slid forward to hold the conductor, and the conductor connecting tape 6 is attached to the lower surface of the exposed conductor 2 that appears between the front half 5A and the second half 5B.
The exposed conductors 2 group attached with is not affected by the strong processing force of splitting and peeling the coating 4 (dividing the coating and pulling it out), and the aligned posture such as the pitch between lines does not collapse and the aligned posture remains the same. Has the effect of being maintained.

[Advantages of the Invention] As described above, the flat multicore electric wire of the present invention has the "stability and moderate bending flexibility" of the contact portion to improve the connectability to the connector and also to provide the twisted wire. The use of the conductor has the effect of improving flexibility and enabling application to two-dimensional bending connection and movable wiring in which the middle of the wiring is repeatedly bent. In addition, the molding method of the present invention can provide a flat multicore electric wire having the above-mentioned effects and can improve the quality by ensuring the aligned posture of the contact portions.

[Brief description of drawings]

FIG. 1 shows the basic structure of a flat multicore electric wire of the present invention,
(A) is a plan view thereof, (B) is a sectional view taken along the line AA of (A), second
Figure: Shows the procedure of the method for molding the flat multicore electric wire of the present invention,
(A) (B) (C) (D) are plan views of the processing procedure,
(E), (F), (G), and (H) are front views of the processing procedure, FIG. 3: a flat multicore electric wire having a conventional structure, (A) is a plan view thereof, and (B) is a front view thereof. , Fig. 4: Shows a flat type multi-core electric wire with a conventional structure, (A) is a plan view, (B) is a front view, main symbols, 1: round electric wire, 2: exposed conductor, 3: contact Part, 4: coated, 5: coated connecting tape, 5A: first half, 5B: second half, 6: conductor connecting tape

Claims (2)

[Claims] 1. A flat multicore electric wire in which a group of round electric wires are arranged in parallel in a plane at a required interval, and exposed conductors obtained by aligning and stripping a coating of a little length at the end serve as a contact portion. In, while attaching a common covering connecting tape to the upper surface and the lower surface of the covering near the base end of the exposed conductor with a little length, a conductor connecting tape separated from the covering connecting tape is attached to the lower surface of the exposed conductor. A flat type multi-core electric wire featuring a pasted end structure. 2. A flat-type multi-core electric wire according to claim 1, wherein a common covering connecting tape is formed on the upper surface and the lower surface of the covering of the end portion of the round electric wire group with a little length. Is attached to divide the first half and the second half into the first half and the second half by exposing the first half and the second half by exposing the first half and the second half together. A conductor is shown, and a common conductor connecting tape is attached to the lower surface of the exposed conductor separately from the covering connecting tape of the latter half portion, and then the front half portion is cut and removed to expose the exposed conductor to the contact portion. A method for forming a flat multicore electric wire, which comprises: