Wiring connection structure

Abstract

To electrically connect a plurality of wires to a crimp connection terminal.SOLUTION: In a crimp connection terminal 5, a connection end 5a, a conductor crimp part 5b, a coating crimp part 5c and a connection plate 5e are disposed successively from the front. Only a specified wire 2a of a flat type wire 1 extends long, a conductor 3 is peeled from an insulating coating layer 4 and crimped by the conductor crimp part 5b, and the insulating coating layer 4 is crimped and fixed by the coating crimp part 5c. Regarding wires 2b-2i other than the specified wire 2a of the flat type wire 1, conductors 3 thereof are peeled from the insulating coating layer 4, placed on the connection plate 5e and welded to the connection plate 5e. The wires 2a-2i are electrically connected to a mating connection end via the connection end 5a.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] The present invention relates to a wiring connection structure that utilizes, for example, a flat electric wire and a crimp connection terminal. [Background technology]

[0002] In wiring of various electric circuits, for example, it may be necessary to branch signal wires or power wires from one location to multiple locations, or to converge them from multiple locations to one location.

[0003] Furthermore, in recent years, as electrical components have become smaller, lighter and more integrated, there has been a demand for smaller circuit connections, but in this case, the branching and concentration described above often becomes difficult. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Utility Model Application Publication No. 60-186617 Summary of the Invention [Problem to be solved by the invention]

[0005] Patent Document 1 discloses a planar flat electric wire in which a plurality of electric wires are arranged in parallel, and such a flat electric wire is used for various purposes.

[0006] An object of the present invention is to provide a wiring connection structure that efficiently utilizes, for example, such flat electric wires and that allows a plurality of electric wires to be easily branched or concentrated at a crimp connection terminal. [Means for solving the problem]

[0007] In order to achieve the above object, the wiring connection structure of the present invention is a wiring connection structure using a crimp connection terminal and a plurality of electric wires, characterized in that the conductors of specified electric wires among the electric wires are crimped and fixed by a conductor crimping portion on the front side of the crimp connection terminal, and the conductors of the electric wires other than the specified electric wire are electrically connected to a connection plate extending on the rear side of the conductor crimping portion. [Effects of the Invention]

[0008] The wiring connection structure according to the present invention makes it possible to branch or concentrate a plurality of electric wires into a small number of crimp connection terminals using, for example, flat electric wires, without using a crimp connection terminal for each electric wire. [Brief explanation of the drawings]

[0009] [Figure 1] FIG. [Figure 2] FIG. 2 is a perspective view of the crimp connection terminal of the embodiment. [Figure 3] FIG. 1 is a perspective view of a processed flat electric wire. [Figure 4] FIG. 2 is a perspective view of a state in which a flat electric wire is connected to a crimp connection terminal. DETAILED DESCRIPTION OF THE INVENTION

[0010] The present invention will be described in detail based on the illustrated embodiment.

[0011] FIG. 1 is a perspective view of one form of flat electric wire 1 used in this embodiment. This flat electric wire 1 has multiple electric wires 2 arranged in parallel on the same plane. Each electric wire 2 consists of a conductor 3 and an insulating coating layer 4 that covers this conductor 3. The conductor 3 is made of, for example, a copper wire with a circular cross section, and the insulating coating layer 4 and protective layer are made of a synthetic resin material with electrical insulation properties. Note that sheet-like protective layers are adhered to both the top and bottom of these electric wires 2, but these protective layers are not shown in the figure. For example, the diameter of the conductor 3 is 0.3 mm, the diameter of the insulating coating layer 4 is 0.6 mm, and the spacing between the conductors 3 of the electric wires 2 is 0.8 mm.

[0012] FIG. 2 is a perspective view of a crimp connection terminal 5 for connecting a specified electric wire of the flat electric wire 1. This crimp connection terminal 5 is composed of a main body portion on the front side, which is composed of a connection end 5a, a conductor crimping portion 5b, and a coating crimping portion 5c, and a flat connecting plate 5e extending to the rear of the main body portion via a connecting portion 5d.

[0013] The crimp connection terminal 5 is formed by punching out a plate made of, for example, a copper alloy into a predetermined shape, chamfering or surface treatment being performed as necessary, and then bending it using a forming press while moving it in a horizontal direction perpendicular to the longitudinal direction of the crimp connection terminal 5.

[0014] The connecting end 5a has, for example, a male terminal structure, and the conductor crimping portion 5b and the coating crimping portion 5c each consist of a pair of conductor crimping pieces 5f and a pair of coating crimping pieces 5g. In the conductor crimping portion 5b, the conductor crimping pieces 5f are raised from both sides in a U-shape, and at both ends of the pieces, gaps 5h are formed by bending the tips inward. In the coating crimping portion 5c, the coating crimping pieces 5g are raised from both sides in a U-shape.

[0015] In a conventional molding process for this type of crimp connection terminal, the crimp connection terminal is bent and shaped while being transported using a feed piece that connects the crimp connection terminal, and the crimp connection terminal is then separated from the feed piece before or after the electric wire is secured to the crimp connection terminal. However, in this embodiment, the feed piece used for transport is cut to a predetermined width in the transport direction and used as a connection plate 5e for current flow. Of course, the connection plate 5e differs in shape and size from conventional feed pieces used simply for transport, as its purpose differs. Alternatively, a separate feed piece dedicated to molding may be connected to the rear of the connection plate 5e, and the crimp connection terminal 5 including the connection plate 5e may be separated from the feed piece after molding.

[0016] The plate thickness of the crimp connection terminal 5 is, for example, 0.15 mm, and the length of the conductor crimping portion 5b of the crimp connection terminal 5 is 5.1 mm. If nine electric wires 2 of the flat electric wire 1 are to be connected to one crimp connection terminal 5, for example, the length of the crimp connection terminal 5 of the connection plate 5e in the longitudinal direction is 2.8 mm, and the width in the lateral direction is 7.6 mm.

[0017] To connect the nine electric wires 2 to this crimp connection terminal 5 as described above, the flat electric wire 1 is processed, for example, as shown in Fig. 3. That is, the protective layer of the flat electric wire 1 is peeled off, and only a specified electric wire 2a in the center, for example, that is to be connected to the crimp connection terminal 5 is extended long, and the remaining nine electric wires 2b to 2i are cut to be shorter than the specified electric wire 2a.

[0018] In the specified electric wire 2a, the conductor 3 is stripped from the insulating coating layer 4 so that it can be crimped by the conductor crimping piece 5f of the conductor crimping portion 5b, and the insulating coating layer 4 can be crimped and fixed by the conductor crimping piece 5g of the coating crimping portion 5c. Also, in the electric wires 2b to 2i, the surrounding insulating coating layer 4 can be peeled off from each conductor 3 so that it can be placed on the connecting plate 5e.

[0019] To crimp and connect the specified electric wire 2a of the flat electric wire 1 processed in this way to the crimp connection terminal 5, the conductor 3 and the insulating coating layer 4 of the specified electric wire 2a are crimped and crimped at the conductor crimping portion 5b and the coating crimping portion 5c using a crimp fixing mechanism, as shown in Fig. 4. This mechanically and electrically connects the specified electric wire 2a to the crimp connection terminal 5.

[0020] Specifically, the conductor crimping pieces 5f that crimp the conductor 3 have gaps 5h, and the conductor 3 is crimped while being elastically plastically processed by the conductor crimping pieces 5f so that some of the gaps 5h remain, thereby ensuring electrical connection of the conductor 3. Furthermore, the insulating coating layer 4 is crimped by the coating crimping pieces 5g of the coating crimping portion 5c, so that the specified electric wire 2a is fixed with enough mechanical strength to prevent it from slipping out of the crimp connection terminal 5.

[0021] 4, the conductors 3 of the remaining electric wires 2b to 2i of the flat electric wire 1 are placed on the connection plate 5e, and are bonded to the connection plate 5e at least at one location, and preferably at multiple locations, for each conductor 3, for example, by ultrasonic bonding to enable electrical conduction. As a result, the conductors 3 of the electric wires 2b to 2i are electrically connected to the crimp connection terminal 5 via the connection plate 5e and the connecting portion 5d.

[0022] In this way, the plurality of electric wires 2a to 2i can branch out from the crimp connection terminal 5 as signal wires and power wires, or the plurality of electric wires 2a to 2i can be concentrated at the crimp connection terminal 5. The male crimp connection terminal 5 to which the electric wires 2a to 2i are connected is fitted into a mating female crimp connection terminal, thereby connecting the crimp connection terminals together and electrically connecting the electric wires 2a to 2i via the crimp connection terminal 5. The crimp connection terminal 5 may also be a female terminal, in which case the mating crimp connection terminal should be male.

[0023] The crimp connection terminal 5 does not necessarily have to have the connection end 5a for fitting, and can also be connected to other electric components by means other than fitting the connection ends together.

[0024] Furthermore, electrical insulation is ensured by inserting the main body of the crimp connection terminal 5 into an insulating housing, and it is also preferable to store the connection plate 5e in the housing. Furthermore, after joining the conductor 3, the connection plate 5e can be made compact by bending it, for example.

[0025] In this embodiment, flat electric wires 1 are used as the multiple electric wires, but instead of the flat electric wires 1, multiple independent individual electric wires may be used, one of which is treated as a specific electric wire and connected to the crimp connection terminal 5, and the conductors of the other electric wires may be joined to the connection plate 5e.

[0026] Furthermore, the terms up and down, left and right, front and back used in this specification are used for explaining the drawings and do not limit the present invention. [Explanation of symbols]

[0027] 1 Flat wire 2 electric wire 3 Conductors 4. Insulating coating layer 5 Crimp connection terminals 5a connection end 5b Conductor crimping part 5c Covered crimp part 5e connection board 5f Conductor crimp piece 5g coated crimp piece

Claims

1. A wiring connection structure using a crimp connection terminal and a plurality of electric wires, a conductor of a specified electric wire among the electric wires is crimped and fixed by a conductor crimping portion on the front side of the crimp connection terminal, and the conductors of the electric wires other than the specified electric wire are electrically connected to a connection plate extending on the rear side of the conductor crimping portion.

2. 2. The wiring connection structure according to claim 1, wherein the plurality of electric wires are flat electric wires that are parallel to each other.

3. 2. The wiring connection structure according to claim 1, wherein the connection plate uses a feeding piece for transporting the crimp connection terminal when the crimp connection terminal is formed.

4. 2. The wiring connection structure according to claim 1, wherein the conductor is connected to the connection plate by ultrasonic bonding.

5. 2. The wiring connection structure according to claim 1, wherein the insulating coating layer of the specified electric wire is fixed by the coating crimping portion of the crimp connection terminal.

6. 2. The wiring connection structure according to claim 1, wherein the crimp connection terminal has a male or female connection end that fits into a female or male connection end of a mating crimp connection terminal.

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