JPWO2015068392A1 - Connection terminal and wire assembly - Google Patents

Abstract

The connection terminal (12) is integrally provided with a flexible flat cable connection portion (20) and a stranded wire connection portion (21). The flexible flat cable connecting portion (20) is substantially flat. The stranded wire connection part (21) is formed in a cylindrical shape into which the conductor (5) and the insulating coating (6) at the tip of the stranded wire (3) can be inserted, and has one end in the axial direction of the cylinder closed. .

Description

  The present invention mainly relates to a configuration of a connection terminal that connects a flexible flat cable and a round wire.

  In recent years, for example, in an electrical wiring of an automobile, an opportunity for adopting a flexible flat cable for wiring for supplying power to a slide door or the like is increasing.

  However, the flexible flat cable is used only in a part, and a wire harness (a bundle of a plurality of stranded wires) is used for wiring in other parts. That is, at present, flexible flat cables and stranded wires (round wires) are mixed and wired. For this reason, the structure which connects a flexible flat cable and a twisted wire is needed.

  In this regard, Non-Patent Document 1 discloses a connection terminal (referred to as “WF terminal” in Non-Patent Document 1) for connecting a flexible flat cable and a stranded wire. This conventional connection terminal is shown in FIG. A conventional connection terminal 90 shown in FIG. 19 is formed by integrally forming a flexible flat cable connection portion 95 and a stranded wire connection portion 91.

  The flexible flat cable connection part 95 has a plurality of piercings 94 protruding in one direction. By passing this pierce 94 through the flexible flat cable from the thickness direction, the conductor of the flexible flat cable and the connection terminal 90 are electrically connected.

  The stranded wire connection portion 91 is configured as a so-called open barrel type crimp terminal, and includes a conductor crimp portion 92 and a covering crimp portion 93. By crimping the conductor crimping portion 92, the conductor crimping portion 92 is crimped to the stranded conductor. Moreover, the crimping | compression-bonding part 93 is crimped | bonded by crimping the said crimping | compression-bonding part 93 to the insulation coating of a stranded wire. Thereby, while ensuring the electrical connection of the conductor of a twisted wire, and the connection terminal 90, the connection terminal 90 can be fixed with respect to the said twisted wire.

  In the connection terminal 90 as described above, the strength of the piercing 94, the conductor crimping portion 92, and the covering crimping portion 93 and the reliability of electrical connection are required. Therefore, as the material of the connection terminal 90, brass or the like that has been used for various terminals has been used.

  With the connection terminal 90 as described above, the conductor of the flexible flat cable and the conductor of the stranded wire can be connected.

“Furukawa Electric Time Report”, No. 132, p. 58-59 (related product "Continuous Power Supply Device for Sliding Doors"), [online], September 2013, Furukawa Electric Co., Ltd. website, [October 15, 2013 search], Internet <URL: http: //www.furukawa.co.jp/jiho/index.htm>

  In the conventional connection terminal 90 shown in FIG. 19, a hole is made in the conductor and covering of the flexible flat cable by the piercing 94. For this reason, for example, when a pulling force is applied to the flexible flat cable, a force is applied to the hole portion, which may cause the hole to expand or the conductor to break.

  For this reason, the conventional connection terminal 90 shown in FIG. 19 has room for improvement in terms of improving the reliability of the flexible flat cable connection portion 95.

  Moreover, although it is another problem, in recent years, from the viewpoint of weight reduction, an aluminum electric wire using aluminum as a conductor of a stranded wire has been increasingly used. On the other hand, in the connection terminal 90 as described above, the strength of the pierce 23, the conductor crimping portion 92, and the covering crimping portion 93 and the reliability of electrical connection are required, and thus there has been a track record of adoption in various terminals. Brass is often used. However, when an aluminum electric wire is connected to the connection terminal 90 (made of brass), dissimilar metal contact occurs, so that there is a problem that electrolytic corrosion occurs when moisture is present in the surroundings. For this reason, the stranded wire connecting portion 91 is required to be waterproof.

  However, in the conventional connection terminal 90 shown in FIG. 19, the twisted wire connecting portion 91 is an open barrel type, and thus the twisted wire connecting portion 91 cannot be expected to be waterproof. Then, in order to prevent generation | occurrence | production of an electric corrosion, although it can also be considered to fill the periphery of the twisted wire connection part 91 with a water stop agent, a manufacturing process will be complicated and manufacturing cost will also rise.

  The present invention has been made in view of the above circumstances, and the purpose thereof is a connection terminal for connecting a flexible flat cable and a round wire, and improves the reliability of the flexible flat cable connection portion, and also provides a twisted wire connection. It is to provide a connection terminal that realizes waterproofing of a part with a simple configuration. Another object of the present invention is to provide a connection terminal that securely connects a flexible flat cable and a round wire and prevents the occurrence of electrolytic corrosion with a simple configuration.

Means and effects for solving the problems

  The problems to be solved by the present invention are as described above. Next, means for solving the problems and the effects thereof will be described.

  According to the viewpoint of this invention, the connection terminal which connects a flexible flat cable and a round wire is provided as follows. That is, this connection terminal integrally includes a flexible flat cable connection portion and a round wire connection portion. The flexible flat cable connecting portion is substantially flat. The round wire connecting portion is formed in a cylindrical shape into which the conductor and insulating coating at the tip of the round wire can be inserted, and has one end in the axial direction of the cylinder closed.

  In the specification of the present application, the “round wire” refers to an electric wire having a substantially circular cross-sectional contour of a conductor portion, and includes so-called single wires and twisted wires.

  As described above, by forming the flexible flat cable connection portion in a plate shape, the conductor of the flexible flat cable can be welded to the flexible flat cable connection portion. Thereby, an unreasonable force is not applied to the flexible flat cable as compared with the conventional connection terminal in which a hole is opened by piercing. Therefore, the reliability of the flexible flat cable connecting portion can be improved. In addition, since the round wire connection portion has a cylindrical shape with one end side closed, a highly waterproof connection structure can be realized.

  According to the 2nd viewpoint of this invention, the connection terminal which connects a flexible flat cable and a round wire is provided as follows. That is, this connection terminal integrally includes a flexible flat cable connection portion and a round wire connection portion. The flexible flat cable connecting portion is substantially flat. The said round wire connection part is an open barrel type.

  As described above, by forming the flexible flat cable connection portion in a plate shape, the conductor of the flexible flat cable can be welded to the flexible flat cable connection portion. Thereby, an unreasonable force is not applied to the flexible flat cable as compared with the conventional connection terminal in which a hole is opened by piercing. Therefore, the reliability of the flexible flat cable connecting portion can be improved. In addition, since the round wire connection portion is an open barrel type, highly reliable electrical connection can be realized.

  Said connection terminal WHEREIN: It is preferable that the dimension of the thickness direction of the said flexible flat cable connection part is smaller than the dimension of the radial direction of the conductor of the said round wire inserted in the said round wire connection part.

  Thus, by making a flexible flat cable connection part into a comparatively thin shape, the said flexible flat cable connection part can be appropriately welded with respect to the conductor of a flexible flat cable.

  According to the 3rd viewpoint of this invention, the connection terminal which connects a flexible flat cable and a round wire is provided as follows. That is, this connection terminal integrally includes a flexible flat cable connection portion and a round wire connection portion. The flexible flat cable connecting portion includes a pierce capable of penetrating the flexible flat cable in a thickness direction. The round wire connecting portion is formed in a cylindrical shape into which the conductor and insulating coating at the tip of the round wire can be inserted, and has one end in the axial direction of the cylinder closed.

  As described above, by forming the round wire connecting portion in a cylindrical shape with one end closed, the sealing property of the round wire connecting portion can be enhanced. Thereby, it can prevent that a water | moisture content penetrate | invades into the inside of a round wire connection part. Therefore, even when the round wire conductor is aluminum, the occurrence of electrolytic corrosion can be prevented.

  In the connection terminal, an intermediate portion between the flexible flat cable connection portion and the round wire connection portion may be formed in a substantially cylindrical shape.

  In this way, the rigidity of the entire connection terminal is improved by forming the intermediate portion in a substantially cylindrical shape.

  The connection terminal is preferably configured as follows. That is, an intermediate portion between the flexible flat cable connecting portion and the round wire connecting portion is formed in a substantially cylindrical shape. The round wire connecting portion is formed in a cylindrical shape by bending a plate material and abutting both ends thereof, or overlapping both ends and welding the both ends linearly. . Similarly, the intermediate portion is also formed into a cylindrical shape by bending the plate material so that both ends thereof are abutted with each other or the both ends are overlapped and the both ends are welded linearly. And when it sees from a predetermined | prescribed direction, the said linear welding part of the said round wire connection part and the said linear welding part of the said intermediate part are on substantially the same straight line.

  As described above, when the round wire connecting portion is formed, it can be formed into a seamless cylindrical shape by welding both ends of the bent plate material. Thereby, the waterproofness of a round wire connection part further improves. Also, when the intermediate portion is formed, the strength of the intermediate portion can be improved by welding to form a cylindrical shape. Then, by arranging the welded portions of the round wire connecting portion and the intermediate portion on substantially the same straight line as described above, both the round wire connecting portion and the intermediate portion can be welded by a single welding operation. Thereby, welding work can be simplified.

  According to the 4th viewpoint of this invention, the following electric wire assemblies are provided. That is, the electric wire assembly includes the connection terminal (the flexible flat cable connection portion is a substantially flat plate shape, and the round wire connection portion is a connection terminal having a cylindrical shape with one end closed) and the flexible connection terminal. A flexible flat cable connected to the flat cable connecting portion; and a round wire connected to the round wire connecting portion of the connecting terminal. The conductor of the flexible flat cable is welded to the flexible flat cable connecting portion. The tip of the round wire is inserted into the round wire connecting portion with a portion of the insulating coating removed to expose the conductor, and the round wire connecting portion is crimped to the conductor and the insulating coating.

  Thus, since the conductor of the flexible flat cable and the flexible flat cable connecting portion are connected by welding, the flexible flat cable connecting portion is more flexible than the conventional connecting terminal in which a hole is pierced in the flexible flat cable. Reliability can be improved. In addition, since the round wire connection portion can be sealed by crimping the cylindrical round wire connection portion with one end closed to the round wire, moisture can be prevented from entering the inside of the round wire connection portion. it can.

  According to a fifth aspect of the present invention, the following wire assembly is provided. That is, the electric wire assembly includes the connection terminal (a connection terminal in which the flexible flat cable connection portion is substantially flat and the round wire connection portion is an open barrel type), and the flexible flat cable connection portion of the connection terminal. And a round wire connected to the round wire connection portion of the connection terminal. The conductor of the flexible flat cable is welded to the flexible flat cable connecting portion. At the tip of the round wire, the conductor and the insulating coating are pressure-bonded to the round wire connecting portion in a state where a part of the insulating coating is removed and the conductor is exposed.

  Thus, since the conductor of the flexible flat cable and the flexible flat cable connecting portion are connected by welding, the flexible flat cable connecting portion is more flexible than the conventional connecting terminal in which a hole is pierced in the flexible flat cable. Reliability can be improved. In addition, a highly reliable electrical connection can be realized by crimping the open barrel type round wire connecting portion to the round wire.

  According to a sixth aspect of the present invention, the following electric wire assembly is provided. That is, the electric wire assembly includes the connection terminal (the flexible flat cable connection portion is provided with a pierce, and the round wire connection portion is a cylindrical connection terminal having one end closed), and the flexible flat cable of the connection terminal. A flexible flat cable connected to the connection portion; and a round wire connected to the round wire connection portion of the connection terminal. The conductor of the flexible flat cable is penetrated by the piercing of the flexible flat cable connecting portion. At the tip of the round wire, the conductor and the insulating coating are pressure-bonded to the round wire connecting portion in a state where a part of the insulating coating is removed and the conductor is exposed.

  Thus, since the said round wire connection part can be sealed by crimping | bonding a round wire connection part to a round wire, it can prevent that a water | moisture content penetrate | invades into the inside of the said round wire connection part.

  In the above wire assembly, the conductor of the flexible flat cable is made of copper or a copper-based alloy, the conductor of the round wire is made of aluminum or an aluminum-based alloy, and the connection terminal is made of copper or a copper-based alloy. be able to.

  When the round wire connection portion of the connection terminal is formed in a cylindrical shape with one end closed, it is excellent in waterproofness, so that the occurrence of electrolytic corrosion can be prevented even when the round wire conductor is aluminum. Further, by using the same type of metal for the connection terminal and the conductor of the flexible flat cable, good welding can be realized even when both are welded.

The perspective view which expands and shows a part of electric wire assembly which concerns on 1st Embodiment of this invention. The assembly perspective view of an electric wire assembly. Side surface sectional drawing of a connection terminal. Side surface sectional drawing which shows a mode that a flat conductor is welded to a flexible flat cable connection part. Side surface sectional drawing which shows the other example of the method of welding a flat conductor and a flexible flat cable connection part. Side surface sectional drawing which shows a mode that a twisted wire connection part is crimped | bonded with respect to a twisted wire. The perspective view of an intermediate body. The perspective view which shows the connecting terminal before performing welding. The perspective view which shows the modification of a connection terminal. The perspective view which shows the modification which made the twisted wire connection part the open barrel type. The perspective view which shows another example of the form which removes the insulator of a flexible flat cable. The perspective view which expands and shows a part of electric wire assembly which concerns on 2nd Embodiment of this invention. The perspective view which shows the flexible flat cable and twisted wire which were connected by the connection terminal. The perspective view of a connection terminal. Side surface sectional drawing of a connection terminal. Side surface sectional drawing which shows a mode that a twisted wire connection part is crimped | bonded with respect to a twisted wire. The perspective view of an intermediate body. The perspective view which shows the connecting terminal before performing welding. The perspective view which shows the conventional connection terminal.

  Next, a first embodiment of the present invention will be described with reference to the drawings. FIG. 1 is an enlarged perspective view showing a part of the wire assembly 1 according to the first embodiment of the present invention. The electric wire assembly 1 of this embodiment includes a flexible flat cable 2, a plurality of stranded wires (round wires) 3, and connection terminals 12.

  The stranded wire 3 has a known configuration including a conductor 5 and an insulating coating 6. In the stranded wire 3 of the present embodiment, the conductor 5 is a bundle of a plurality of aluminum strands. The conductor 5 may be made of a material other than aluminum (for example, copper) as long as it is a conductor. The insulating coating 6 is made of an insulating material such as a resin and is disposed so as to cover the periphery of the conductor 5.

  The flexible flat cable 2 has a known configuration including a flat conductor 7 and an insulator 8. The flat conductor 7 is a strip-shaped metal plate or metal foil, and is formed in a flat shape with a rectangular cross section. In the flexible flat cable 2 of the present embodiment, the flat conductor 7 is made of copper. However, the flat conductor 7 may be made of a material other than copper (for example, aluminum) as long as it is a conductor. A plurality of flat conductors 7 are arranged in the width direction. Note that the flexible flat cable 2 of the present embodiment includes four conductors.

  The insulator 8 is a resin film having insulating properties. The insulator 8 is disposed so as to sandwich a plurality (four in the case of this embodiment) of flat conductors 7 included in the flexible flat cable 2 from both sides in the thickness direction.

  The connection terminal 12 connects the flat conductor 7 of the flexible flat cable 2 and the conductor 5 of the stranded wire 3. Note that one connection terminal 12 is connected to each flat conductor 7 of the flexible flat cable 2, and one stranded wire 3 is connected to each connection terminal 12. For example, in the case of the present embodiment, four connection terminals 12 are connected to one flexible flat cable 2. Therefore, in this embodiment, four stranded wires 3 are connected to one flexible flat cable 2 (see FIG. 1).

  Next, the structure of the connection terminal 12 of this embodiment will be described in detail.

  The connection terminal 12 of the present embodiment is made of a copper alloy such as brass whose surface is plated with tin (Sn). In addition, the connection terminal 12 may be comprised from raw materials (for example, aluminum) other than copper, if it is a conductor.

  2 and 3 show the connection terminal 12 in a state before the flexible flat cable 2 and the stranded wire 3 are connected. As shown in FIG.2 and FIG.3, the connection terminal 12 of this embodiment integrally forms the flexible flat cable connection part 20 and the twisted wire connection part (round wire connection part) 21. As shown in FIG.

  As shown in FIGS. 2 and 3, the end of the flexible flat cable 2 is connected to the flexible flat cable connecting portion 20. The end of the stranded wire 3 is connected to the stranded wire connecting portion 21. The direction in which the flexible flat cable connection portion 20 and the stranded wire connection portion 21 are arranged is referred to as the “longitudinal direction” of the connection terminal 12.

  As shown in FIGS. 2 and 3, the flexible flat cable connection portion 20 of the connection terminal 12 is elongated along the longitudinal direction and is formed in a flat plate shape.

  As shown in FIGS. 2 and 3, the stranded wire connection portion 21 has a cylindrical shape (hollow shape). In the present embodiment, the axial direction of the cylindrical twisted wire connecting portion 21 coincides with the longitudinal direction of the connection terminal 12. An end portion on one side in the axial direction of the stranded wire connecting portion 21 (an end portion on the flexible flat cable connecting portion 20 side in this embodiment) is closed for waterproofing (closed portion 24). On the other hand, the end of the stranded wire connection portion 21 opposite to the closing portion 24 is opened so that the tip of the stranded wire 3 can be inserted (open portion 25). Thus, the twisted wire connection part 21 of this embodiment is formed in the cylinder shape by which the one end side was closed.

  Next, a method for connecting the flexible flat cable 2 to the flexible flat cable connecting portion 20 will be described.

  First, the operator removes the insulator 8 at the end of the flexible flat cable connecting portion 20 and exposes the tip of the flat conductor 7 (state shown in FIGS. 2 and 3). Although the method of removing the insulator 8 is not particularly limited, the insulator 8 is physically peeled off after an appropriate cut is made in the insulator 8 with, for example, a blade. Further, for example, the insulator 8 may be removed by sublimating the resin of the insulator 8 with a laser.

  In addition, when removing the insulator 8 as described above, it is preferable to remove the insulator 8 only on one surface side of the flexible flat cable 2 and leave the insulator 8 on the other surface side (see FIG. 2 and FIG. 2). (See FIG. 3). Thus, by leaving the insulator 8 on one side, the exposed flat conductor 7 can be supported from the one side by the left insulator 8, thus preventing the flat conductor 7 from being damaged. it can.

  Subsequently, the operator arranges the exposed flat conductor 7 and the flexible flat cable connecting portion 20 so as to face each other (FIG. 3), and superimposes both in the thickness direction. In this state, the flat conductor 7 and the flexible flat cable connecting portion 20 are welded (FIG. 4). Thereby, the electrical connection between the flat conductor 7 and the connection terminal 12 is ensured, and the flat conductor 7 is mechanically fixed to the connection terminal 12.

  Although the method of welding the flat conductor 7 and the flexible flat cable connection part 20 is arbitrary, for example, fiber laser welding can be used.

  When welding the flat conductor 7 and the flexible flat cable connection part 20, it welds from the flexible flat cable connection part 20 side. This is because, as shown in FIG. 4, the insulator 8 is left on the side opposite to the flexible flat cable connecting portion 20 when viewed from the exposed flat conductor 7. Therefore, even if it is going to weld from the flat conductor 7 side, the remaining insulator 8 becomes obstructive and cannot be welded appropriately.

  For example, as shown in FIG. 4, in a state where the flat conductor 7 and the flexible flat cable connecting portion 20 are overlapped in the thickness direction, the laser light irradiation portion 80 of the fiber laser welder is provided on the flexible flat cable connecting portion 20 side. Place. And the said flexible flat cable connection part 20 and the flat conductor 7 are welded by irradiating a laser beam with respect to the flexible flat cable connection part 20 from the said laser beam irradiation part 80. FIG.

  Thus, in this embodiment, since welding is performed from the flexible flat cable connection portion 20 side, the flexible flat cable connection portion 20 is too thick, or the surface of the flexible flat cable connection portion 20 is uneven. If it exists, the said flexible flat cable connection part 20 and the flat conductor 7 cannot be welded appropriately by fiber laser welding. In this regard, as described above, the flexible flat cable connecting portion 20 of the present embodiment is formed in a flat plate shape. That is, the flexible flat cable connecting portion is flat and has no unevenness, and has no extra thickness. Thereby, the flexible flat cable connection part 20 and the flat conductor 7 can be appropriately welded by fiber laser welding.

  In addition, this inventor also tried the structure which welds the conductor 5 of the twisted wire 3 directly with respect to the flat conductor 7 in the process of trial and error leading to this invention. However, it has been found that even if the conductor 5 of the stranded wire 3 is welded to the flat conductor 7 by fiber laser welding, it may not be welded well. It is considered that this is because the conductor 5 of the stranded wire 3 is too thick for fiber laser welding.

  Therefore, in the connection terminal 12 of the present embodiment, the flexible flat cable connection portion 20 is configured to be thinner than the conductor 5 of the stranded wire 3. More specifically, the dimension T1 (see FIG. 3) in the thickness direction of the flexible flat cable connecting portion 20 is set to the dimension D1 in the radial direction of the conductor 5 of the stranded wire 3 connected to the stranded wire connecting portion 21 (see FIG. 3). ) Smaller than. Accordingly, even when it is difficult to directly weld the conductor 5 of the stranded wire 3 to the flat conductor 7, the connection terminal 12 of the present embodiment is used to appropriately weld the flat conductor 7. Can be done.

  However, the connection method described above is an example, and other methods can be used for connection. For example, as shown in FIG. 5, the insulator 8 on both sides as well as one side of the flexible flat cable 2 is removed, and then the laser light irradiation unit 80 of the fiber laser welder is arranged on the flexible flat cable 2 side and welded. May be.

  Next, a method for connecting the stranded wire 3 to the stranded wire connecting portion 21 will be described.

  First, the operator removes the insulating coating 6 at a predetermined length at the tip of the stranded wire 3 so that the conductor 5 is exposed (the state shown in FIGS. 2 and 3). The tip of the stranded wire 3 in this state is inserted into the stranded wire connecting portion 21 from the open portion 25 of the stranded wire connecting portion 21. At this time, not only the portion where the conductor 5 is exposed but also the portion where the conductor 5 is not exposed (portion where the insulating coating 6 is not removed) is inserted into the stranded wire connection portion 21.

  Next, the operator operates the crimping tool composed of the first crimping die 71 and the second crimping die 72 to crimp the stranded wire connection portion 21 (see FIG. 6A). ). As described above, since the conductor 5 at the tip of the stranded wire 3 is exposed, the stranded wire connecting portion 21 is crimped to the conductor 5 (FIG. 6B). Thereby, the electrical connection of the conductor 5 of the twisted wire 3 and the twisted wire connection part 21 is ensured.

  Further, the stranded wire connection portion 21 is also crimped to the insulating coating 6 of the stranded wire 3. Thereby, since the stranded wire connection part 21 closely_contact | adheres to the insulation coating 6 of the stranded wire 3, the open part 25 of the stranded wire connection part 21 is sealed. Thereby, it is possible to prevent water from entering the stranded wire connecting portion 21 from the open portion 25.

  As described above, in this embodiment, the conductor 5 of the stranded wire 3 is made of aluminum, and the connection terminal 12 is made of brass. As described above, when different metals are used for the connection terminal 12 and the conductor 5 of the stranded wire 3, the stranded wire connection portion 21 is required to have high waterproof performance in order not to cause electrolytic corrosion. In this regard, in this embodiment, as described above, the end of the stranded wire 3 is inserted into the stranded wire connecting portion 21 formed in a cylindrical shape with one end closed, and the stranded wire connecting portion 21 is connected to the stranded wire 3. The stranded wire connection portion 21 is hermetically sealed by pressure bonding to the insulating coating 6. Thereby, since the water immersion in the twisted wire connection part 21 can be prevented, electrolytic corrosion can be prevented. Moreover, according to the structure of this embodiment, since the water stop agent etc. for waterproofing the twisted wire connection part 21 are unnecessary, waterproofing of the twisted wire connection part 21 is realizable by simple structure.

  In the above description, the method for connecting the flexible flat cable 2 to the flexible flat cable connecting portion 20 is described, and then the method for connecting the stranded wire 3 to the stranded wire connecting portion 21 is described. The order in which the flexible flat cable 2 and the stranded wire 3 are connected to 12 is not particularly limited.

  Then, the manufacturing method of the connection terminal 12 of this embodiment is demonstrated.

  The connection terminal 12 of the present embodiment is formed by punching a single plate material to form the intermediate body 30 as shown in FIG. 7, and then bending the intermediate body 30 as appropriate.

  In the intermediate body 30 in FIG. 7, a portion corresponding to the flexible flat cable connecting portion 20 is elongated along the longitudinal direction and is formed in a flat plate shape.

  In the intermediate body 30 in FIG. 7, a portion corresponding to the stranded wire connection portion 21 is configured as a first protrusion portion 31 that partially protrudes in the width direction. Here, the “width direction” refers to a direction orthogonal to the longitudinal direction of the connection terminal 12 in the plane formed by the plate-like intermediate body 30. In the present embodiment, the first projecting portion 31 is formed so as to project in a rectangular shape.

  When forming the stranded wire connection portion 21 from the intermediate body 30 in FIG. 7, the first protruding portion 31 is bent, and both end surfaces in the protruding direction of the first protruding portion 31 are butted together, thereby twisting the stranded wire. The connecting portion 21 is formed in a substantially cylindrical shape (state shown in FIG. 8).

  In this state, there is a gap between the end surfaces of the first protrusions 31. This gap portion can be said to be a “seam” on the peripheral surface of the stranded wire connection portion 21. In this embodiment, the welded portion 33 is formed by welding the end surfaces of the first projecting portions 31 (by welding the “seam” portion) (FIG. 2). Thereby, since the clearance gap of the said seam can be block | closed, the surrounding surface of the twisted wire connection part 21 can be comprised continuously (as there is no clearance gap).

  Although the method of welding the welding part 33 is arbitrary, it can weld with a fiber laser, for example. In the present embodiment, the “seam” of the stranded wire connecting portion 21 is substantially linear in a state where both end faces of the first protruding portion 31 are butted together (FIG. 8). Thereby, since the welding part 33 can be formed linearly, it is easy to weld.

  Next, the end on one side in the axial direction of the twisted wire connection portion 21 configured in a substantially cylindrical shape as described above (in this embodiment, the end on the flexible flat cable connection portion 20 side) is compressed and crushed. And the closure part 24 is formed by welding to the said crushed location (FIG. 2). In addition, although the method of welding the closing part 24 is arbitrary, similarly to the welding part 33, welding can be performed with a fiber laser.

  By performing the above processing, the substantially cylindrical stranded wire connecting portion 21 whose one end is closed is completed. By closing the “seam” on the peripheral surface of the stranded wire connecting portion 21 and the end portion on one side of the stranded wire connecting portion 21 by welding, the stranded wire connecting portion 21 having excellent airtightness can be realized.

  As described above, the connection terminal 12 of the present embodiment integrally includes the flexible flat cable connection portion 20 and the stranded wire connection portion 21. The flexible flat cable connecting portion 20 has a substantially flat plate shape. The stranded wire connecting portion 21 is formed in a cylindrical shape into which the conductor 5 and the insulating coating 6 at the tip of the stranded wire 3 can be inserted, and the one end side in the axial direction of the cylinder is closed.

  Thus, the flat conductor 7 of the flexible flat cable 2 can be welded to the flexible flat cable connecting portion 20 by forming the flexible flat cable connecting portion 20 in a plate shape. Thereby, an unreasonable force is not applied to the flexible flat cable 2 as compared with a conventional connection terminal in which a hole is opened by piercing. Therefore, the reliability of the flexible flat cable connecting portion 20 can be improved. Moreover, since the twisted wire connection part 21 was made into the cylinder shape which closed the one end side, a highly waterproof connection structure is realizable.

  Further, as described above, in the connection terminal 12 of the present embodiment, the dimension T1 in the thickness direction of the flexible flat cable connection part 20 is the dimension D1 in the radial direction of the conductor 5 of the stranded wire 3 inserted into the stranded wire connection part 21. Smaller than.

  Thus, the flexible flat cable connection part 20 can be appropriately welded to the flat conductor 7 of the flexible flat cable 2 by making the flexible flat cable connection part 20 relatively thin.

  As described above, the wire assembly 1 of the present embodiment includes the connection terminal 12, the flexible flat cable 2 connected to the flexible flat cable connection portion 20 of the connection terminal 12, and the stranded wire connection portion 21 of the connection terminal 12. And a stranded wire 3 connected to. The flat conductor 7 of the flexible flat cable 2 is welded to the flexible flat cable connecting portion 20. The tip of the stranded wire 3 is inserted into the stranded wire connecting portion 21 with the conductor 5 exposed by removing a part of the insulating coating 6, and the stranded wire connecting portion 21 is crimped to the conductor 5 and the insulating coating 6. ing.

  Thus, since the flat conductor 7 of the flexible flat cable 2 and the flexible flat cable connecting portion 20 are connected by welding, the flexible flat cable is more flexible than a conventional connection terminal in which a hole is pierced in the flexible flat cable. The reliability of the cable connection part 20 can be improved. Moreover, since the said twisted wire connection part 21 can be sealed by crimping | bonding the twisted wire connection part 21 to the twisted wire 3, it can prevent that a water | moisture content penetrate | invades inside the said twisted wire connection part 21. FIG.

  Further, as described above, in the electric wire assembly 1 of the present embodiment, the flat conductor 7 of the flexible flat cable is made of copper, the conductor 5 of the stranded wire 3 is made of aluminum, and the connection terminal 12 is made of a copper-based alloy (brass). .

  That is, since the connection terminal 12 of the present invention is excellent in the waterproof property of the stranded wire connection portion 21, even when the stranded wire conductor 5 is aluminum, the occurrence of electrolytic corrosion can be prevented. Moreover, both can be favorably welded by making the connecting terminal 12 and the flat conductor 7 of the flexible flat cable 2 into the same kind of metal.

  Although the first embodiment of the present invention has been described above, the above configuration can be changed as follows, for example.

  For example, as shown in the connection terminal 12x of FIG. 9, the intermediate portion 22 between the flexible flat cable connection portion 20 and the stranded wire connection portion 21 may be formed in a cylindrical shape (square tube shape). Thus, the rigidity of the connection terminal 12 can be improved by forming the intermediate part 22 in a cylindrical shape.

  For example, as shown in a connection terminal 12y in FIG. 10, a so-called open barrel type twisted wire connecting portion 41 may be provided instead of the cylindrical twisted wire connecting portion 21 whose one end is closed. The stranded wire connection portion 41 includes a conductor crimping portion 42 and a covering crimping portion 43. The conductor crimping portion 42 is crimped to the conductor 5 of the stranded wire 3 by crimping the conductor crimping portion 42. Further, the coated crimping portion 43 is crimped to the insulating coating 6 of the stranded wire 3 by crimping the coated crimped portion 43.

  In the said embodiment, although the cylindrical twisted wire connection part 21 in which the one end was closed has faced the edge parts of the 1st bent part 31 bent, it is not restricted to this but is the 1st protruding part 31. These end portions may be overlapped in the thickness direction. In this case, the welded portion 33 is formed by welding the overlapped portions.

  In the said embodiment, the flexible flat cable connection part 20 and the twisted wire connection part 21 are integrally formed from one board | plate material. However, the present invention is not limited to this. For example, the flexible flat cable connection portion 20 and the stranded wire connection portion 21 are formed of separate members, and are connected later by welding or the like, whereby the flexible flat cable connection portion 20 and the stranded wire connection portion. 21 may be integrated.

  In FIG. 2, the tip portion of the insulator 8 of the flexible flat cable 2 is entirely removed to expose the flat conductor 7, but the form of removing the insulator 8 is not limited to this, and the flat conductor 7 is It only needs to be exposed. For example, as illustrated in FIG. 11A, the insulator 8 may be removed in a U shape (or U shape) for each flat conductor 7. For example, as shown in FIG. 11B, the flat conductor 7 may be exposed by forming a window-like opening in the insulator 8. However, in the case of FIG. 11B, since the tip of the flat conductor 7 is not completely exposed, the insulator 8 becomes an obstacle when the flat conductor 7 and the flexible flat cable connecting portion 20 are overlapped. Thus, a gap corresponding to the thickness of the insulator 8 may occur between the flat conductor 7 and the flexible flat cable connecting portion 20. Therefore, in order to perform welding in such a case, some device is required such as applying a force in the thickness direction so as to bring the flat conductor 7 and the flexible flat cable connecting portion 20 into close contact with each other and increasing the output of the welding machine. is there.

  Welding between the insulator 8 and the flexible flat cable connecting portion 20 can also be performed by resistance welding. When resistance welding is performed, the flat conductor 7 and the flexible flat cable connecting portion 20 are sandwiched between probes in the thickness direction, and welding is performed by passing an electric current in the thickness direction. In addition, when performing resistance welding in this way, it is necessary to flow an electric current in the thickness direction of the flat conductor 7 in principle. Therefore, when performing resistance welding, the insulator 8 on both surfaces of the flexible flat cable 2 is removed when the flat conductor 7 is exposed.

  Next, a second embodiment will be described. FIG. 12 is an enlarged perspective view showing a part of the wire assembly 1 according to the second embodiment of the present invention. In the description of the present embodiment, the same or similar members as those of the above-described embodiment may be denoted by the same reference numerals in the drawings, and description thereof may be omitted.

  The electric wire assembly 1 according to the present embodiment includes a plurality of flexible flat cables 2, a plurality of stranded wires (round wires) 3, and a connector portion 4.

  The connector part 4 is comprised from the outer side case 51, the inner side case 52, and the connection terminal 12z.

  As shown in FIG. 2, the connection terminal 12 z connects the flat conductor 7 of the flexible flat cable 2 and the conductor 5 of the stranded wire 3. Note that one connection terminal 12z is connected to each flat conductor 7 of the flexible flat cable 2, and one stranded wire 3 is connected to each connection terminal 12z. For example, in the case of this embodiment, four connection terminals 12 z are connected to one flexible flat cable 2. Therefore, in this embodiment, four twisted wires 3 are connected to one flexible flat cable 2 (see FIG. 12).

  The inner case 52 is configured to accommodate a plurality (four in this embodiment) of connection terminals 12z connected to one flexible flat cable 2. Specifically, as shown in FIG. 13, the inner case 52 has a plurality of accommodation spaces 53 (four in this embodiment) that can accommodate the connection terminals 12z. The inner case 52 is provided with positioning protrusions 54 for positioning each connection terminal 12z.

  The inner case 52 is configured to be laminated in the thickness direction of the flexible flat cable 2 in a state where the connection terminal 12z is accommodated in the accommodation space 53 (state of FIG. 12). The outer case 51 (detailed illustration is omitted) is configured to accommodate a plurality of stacked inner cases 52.

  The flexible flat cable 2 and the stranded wire 3 are electrically connected by the connector portion 4 having the above configuration.

  Next, the structure of the connection terminal 12z of this embodiment will be described in detail.

  The connection terminal 12z of this embodiment is made of a copper alloy such as brass whose surface is plated with tin (Sn), as in the first embodiment. The connection terminal 12z may be made of a material other than copper (for example, aluminum) as long as it is a conductor.

  The connection terminal 12z of the present embodiment is formed by integrally forming a flexible flat cable connection portion 20x and a stranded wire connection portion (round wire connection portion) 21. The direction in which the flexible flat cable connection portion 20x and the stranded wire connection portion 21 are arranged is referred to as the “longitudinal direction” of the connection terminal 12z. As shown in FIG. 2, the end portion of the flexible flat cable 2 is connected to the flexible flat cable connecting portion 20x. The end of the stranded wire 3 is connected to the stranded wire connecting portion 21.

  14 and 15 show the connection terminal 12z in a state before the flexible flat cable 2 and the stranded wire 3 are connected. As shown in FIG. 3, the flexible flat cable connecting portion 20x of the connection terminal 12z has a plurality of piercings 23 protruding in a direction orthogonal to the longitudinal direction. A direction parallel to the direction in which the piercing 23 protrudes is referred to as a “projection direction”.

  Since the configuration of the stranded wire connection portion 21 is substantially the same as that of the first embodiment described above, the description thereof is omitted.

  As shown in FIG. 14, in the connection terminal 12z of the present embodiment, the intermediate portion 22 between the flexible flat cable connection portion 20x and the stranded wire connection portion 21 is formed in a rectangular tube shape. Thus, the rigidity of the connection terminal 12z can be increased by configuring the intermediate portion 22 in a rectangular tube shape. It should be noted that the axial direction of the intermediate portion 22 coincides with the longitudinal direction of the connection terminal 12z.

  The intermediate portion 22 is formed so as to fit in the accommodation space 53 of the inner case 52. Further, a positioning hole 26 that engages with a positioning projection 54 formed in the inner case 52 is formed in the intermediate portion 22 (FIGS. 13 and 15). With this configuration, the connecting portion 12z can be attached in a state of being positioned with respect to the inner case 52 by fitting the intermediate portion 22 into the accommodation space 53 and inserting the positioning projection 54 into the positioning hole 26.

  Next, a method for connecting the flexible flat cable 2 to the flexible flat cable connecting portion 20x will be described.

  First, the operator causes the pierce 23 of the flexible flat cable connecting portion 20x to penetrate the flexible flat cable 2 from the thickness direction. At this time, the pierce 23 penetrates the flat conductor 7 and the insulator 8 of the flexible flat cable 2. Thereby, the electrical connection of the flat conductor 7 of the flexible flat cable 2 and the flexible flat cable connection part 20x is ensured. In addition, since the flat conductor 7 is penetrated by the piercing 23 together with the insulator 8 as described above, it is not necessary to remove the insulator 8 and expose the flat conductor 7.

  Then, an operator bends the front-end | tip of the piercing 23 which penetrated the flexible flat cable 2 (state of FIG. 13). Thereby, the flexible flat cable 2 is mechanically fixed with respect to the flexible flat cable connection part 20x, and it can prevent that the piercing | piercing 23 comes off from the said flexible flat cable 2. FIG.

  In addition, about the method of connecting the twisted wire 3 with respect to the twisted wire connection part 21, since it is the same as that of the above-mentioned 1st Embodiment (FIG.15 and FIG.16), description is abbreviate | omitted. In the above description, the method for connecting the flexible flat cable 2 to the flexible flat cable connecting portion 20x is described, and then the method for connecting the stranded wire 3 to the stranded wire connecting portion 21 is described. However, the order of connecting the flexible flat cable 2 and the stranded wire 3 is not particularly limited.

  Then, the manufacturing method of the connection terminal 12z of this embodiment is demonstrated.

  The connection terminal 12z of this embodiment is formed by punching a single plate material to form the intermediate body 30 as shown in FIG. 17, and then bending the intermediate body 30 as appropriate.

  In the intermediate body 30 in FIG. 17, a portion corresponding to the flexible flat cable connecting portion 20 x has a plurality of earrings 23. In the intermediate body 30, the pierce 23 is formed so that the tip thereof protrudes in the width direction. Here, the “width direction” refers to a direction orthogonal to the longitudinal direction of the connection terminal 12 z in the plane formed by the plate-like intermediate body 30.

  When the flexible flat cable connecting portion 20x is formed from the intermediate body 30 in FIG. 17, the base portion of the pierce 23 is bent so that the tip of the pierce 23 faces the above-described “projection direction”. Thereby, the flexible flat cable connection part 20x which has several piercings 23 which protrude toward a protrusion direction is shape | molded (FIG. 18).

  In the intermediate body 30 in FIG. 17, a portion corresponding to the stranded wire connecting portion 21 is configured as a first protruding portion 31 that partially protrudes in the width direction.

  The method of forming the stranded wire connection portion 21 from the first protrusion 31 is the same as the method described in the first embodiment (FIGS. 2, 7, 8, etc.), but will be briefly described below. First, the first projecting portion 31 shown in FIG. 17 is bent into a cylindrical shape, but both end surfaces in the projecting direction of the first projecting portion 31 are butted together, and a space between the butted end surfaces (seam) is welded. . Thereby, the linear 1st welding part 33 as shown in FIG. 14 is formed. Next, the end of one side in the axial direction (in this embodiment, the end on the side of the flexible flat cable connection 20x) of the twisted wire connection portion 21 configured in a substantially cylindrical shape is compressed and crushed. The closure part 24 shown in FIG. 14 is formed by welding to a location. As described above, the substantially cylindrical stranded wire connecting portion 21 whose one end is closed is completed.

  In the intermediate body 30 in FIG. 17, a portion corresponding to the intermediate portion 22 is configured as a second protruding portion 32 that partially protrudes in the width direction. In the present embodiment, the second projecting portion 32 is formed so as to project in a rectangular shape.

  When the intermediate portion 22 is formed from the intermediate body 30 in FIG. 17, the second protrusion 32 is bent, and both end surfaces in the protrusion direction of the second protrusion 32 are abutted to each other, thereby forming the intermediate portion 22. It is configured in a substantially rectangular tube shape (state shown in FIG. 18).

  In this state, there is a gap between the end surfaces of the second protrusions 32. This gap portion can be said to be a “seam” on the peripheral surface of the intermediate portion 22. In this embodiment, the 2nd welding part 34 is formed by welding the end surfaces of the said 2nd protrusion part 32 (by welding the "seam" part) (FIG. 14).

  Although the method of welding the second welded portion 34 is arbitrary, it is possible to perform welding with a fiber laser in the same manner as the first welded portion 33. In the present embodiment, the “seam” of the intermediate portion 22 is substantially linear in a state where both end surfaces of the second projecting portion 32 are abutted with each other (FIG. 18). Thereby, since the 2nd welding part 34 can be formed in linear form, it is easy to weld.

  If the second welded portion 34 is formed as described above, the gap between the joints of the rectangular tube-shaped intermediate portion 22 can be closed, so that the rectangular tube-shaped structure can be made stronger. Thereby, since the rigidity of the said intermediate part 22 can be improved, the intensity | strength of the whole connecting terminal 12z can be improved.

  As described above, the connection terminal 12z (FIG. 14) of the present embodiment can be formed from the intermediate body 30 of FIG.

  In addition, when shape | molding the connection terminal 12z from the intermediate body 30, the order which bends the piercing 23, the 1st protrusion part 31, and the 2nd protrusion part 32 is arbitrary, and is not specifically limited. They can also be bent simultaneously by a press bending die or the like.

  Similarly, the order in which the first welding portion 33, the closing portion 24, and the second welding portion 34 are welded is arbitrary, and is not particularly limited. However, if the welding order is devised, the efficiency of the welding operation can be improved. For example, in this embodiment, when forming the 1st welding part 33, the 2nd welding part 34 is also formed.

  Specifically, it is as follows. That is, in the present embodiment, in a state where the first protrusion 31 and the second protrusion 32 of the intermediate body 30 are bent (state in FIG. 18), the “seam” on the peripheral surface of the stranded wire connection portion 21 and the intermediate portion The “seam” of the circumferential surface of 22 is configured to exist on a straight line. In this way, by configuring the two “seams” to be welded to be on the same straight line, even in the case of fiber laser welding, the two “seams” can be formed without performing readjustment of the focus. Can be welded.

  Therefore, in the present embodiment, when the first welded portion 33 is formed in a state where the first projecting portion 31 and the second projecting portion 32 of the intermediate body 30 are bent (the state shown in FIG. 18), Welding is performed in a straight line to the tip in the longitudinal direction, and at this time, the second welded portion 34 is also formed. According to this, since the 1st welding part 33 and the 2nd welding part 34 can be formed by one-time welding, welding can be performed efficiently.

  And after forming the 1st welding part 33 and the 2nd welding part 34 as mentioned above, the edge part of the one side of the twisted wire connection part 21 is crushed, the said crushed part is welded, and the closure part 24 Form. In addition, since the connection terminal 12z (FIG. 14) of this embodiment is manufactured as described above, when viewed from a predetermined direction (specifically, when viewed from the protruding direction of the pierce 23), The first welded portion 33 and the second welded portion 34 are configured to exist on the same straight line.

  As described above, the connection terminal 12z of the present embodiment integrally includes the flexible flat cable connection portion 20x and the stranded wire connection portion 21. The flexible flat cable connecting portion 20x includes a pierce 23 that can penetrate the flexible flat cable 2 in the thickness direction. The stranded wire connecting portion 21 is formed in a cylindrical shape into which the conductor 5 and the insulating coating 6 at the tip of the stranded wire 3 can be inserted, and the one end side in the axial direction of the cylinder is closed.

  By forming the stranded wire connection portion 21 in a cylindrical shape with one end closed, the hermeticity of the stranded wire connection portion 21 can be enhanced. Thereby, it is possible to prevent moisture from entering the stranded wire connection portion 21. Therefore, even in the case of this embodiment in which the conductor 5 of the stranded wire 3 is aluminum, the occurrence of electrolytic corrosion can be prevented.

  Further, as described above, in the connection terminal 12z of the present embodiment, the intermediate portion 22 between the flexible flat cable connection portion 20x and the stranded wire connection portion 21 is formed in a substantially cylindrical shape.

  Thus, the rigidity of the whole connection terminal 12z improves by forming the intermediate part 22 in a substantially cylindrical shape.

  Further, as described above, the connection terminal 12z of the present embodiment is configured as follows. That is, the stranded wire connecting portion 21 is formed in a cylindrical shape by bending the first projecting portion 31, butting both ends thereof and welding the both ends linearly. Similarly, the intermediate portion 22 is formed in a cylindrical shape by bending the second projecting portion 32, butting both ends thereof and welding the both ends. And when it sees from a predetermined | prescribed direction, the linear welding part of the twisted wire connection part 21 and the linear welding part of the intermediate part 22 exist on a substantially identical straight line.

  As described above, when the stranded wire connection portion 21 is formed, it can be formed into a seamless cylindrical shape by welding both ends of the bent first protruding portion 31. Thereby, the waterproofness of the twisted wire connection part 21 further improves. In addition, when the intermediate portion 22 is formed, the strength of the intermediate portion 22 can be improved by welding and forming a cylindrical shape. And by arranging the welding part of the twisted wire connection part 21 and the intermediate part 22 on the substantially same straight line as mentioned above, both the twisted wire connection part 21 and the intermediate part 22 can be welded by one welding operation. Thereby, welding work can be simplified.

  Further, as described above, the wire assembly 1 of the present embodiment includes the connection terminal 12z, the flexible flat cable 2 connected to the flexible flat cable connection portion 20x of the connection terminal 12z, and the stranded wire connection portion of the connection terminal 12z. And a twisted wire 3 connected to 21. The tip of the stranded wire 3 is inserted into the stranded wire connecting portion 21 with a part of the insulating coating 6 removed to expose the conductor 5, and the stranded wire connecting portion 21 is crimped to the conductor 5 and the insulating coating 6. ing.

  Thus, by crimping the stranded wire connection portion 21 to the stranded wire 3, the stranded wire connection portion 21 can be sealed, so that moisture can be prevented from entering the stranded wire connection portion 21.

  Further, as described above, in the electric wire assembly 1 of the present embodiment, the flat conductor 7 of the flexible flat cable is copper, the conductor 5 of the stranded wire 3 is aluminum, and the connection terminal 12z is a copper-based alloy (brass).

  That is, since the connection terminal 12z of this embodiment is excellent in the waterproof property of the twisted wire connection part 21, even when the conductor 5 of the twisted wire 3 is aluminum, generation | occurrence | production of electrolytic corrosion can be prevented. In the above-described embodiment, the flat conductor 7 and the connection terminal 12z are the same type of metal, and there is no concern that electric corrosion will occur between the two. Therefore, the waterproof property is not required for the flexible flat cable connection portion 20x in this respect.

  Although the second embodiment of the present invention has been described above, the above configuration can be changed as follows, for example.

  In the above embodiment, the “weld” of the intermediate portion 22 is welded to form the second welded portion 34, but this is not necessarily the case. Since the intermediate part 22 is not particularly required to be waterproof, even if a gap exists at the joint of the intermediate part 22, there is no problem in terms of waterproofness. Therefore, the second weld 34 may not be formed (the seam of the intermediate part 22 may not be welded).

  Moreover, you may abbreviate | omit the structure which forms the intermediate part 22 in a cylinder shape.

  In the said embodiment, although the twisted wire connection part 21 face | matched the edge parts of the 1st protrusion part 31 bent, it is not only this but the edge parts of the 1st protrusion part 31 are thickness directions. You may superimpose. In this case, the first welded portion 33 is formed by welding the overlapped portions. Moreover, in the said embodiment, although the intermediate part 22 face | matched the edge parts of the 2nd protrusion part 32 bent, it is not limited to this but the edge parts of the 2nd protrusion part 32 are thickness directions. You may superimpose. In this case, the overlapped portion is welded to form the second welded portion 34.

  The shapes and the like of the outer case 51 and the inner case 52 can be changed as appropriate. However, the outer case 51 and the inner case 52 are not essential components for carrying out the present invention, and can be omitted.

  In the said embodiment, the flexible flat cable connection part 20x and the twisted wire connection part 21 are integrally formed from one board | plate material. However, the present invention is not limited to this. For example, the flexible flat cable connection portion 20x and the stranded wire connection portion 21 are formed of separate members and connected later by welding or the like, whereby the flexible flat cable connection portion 20x and the stranded wire connection portion. 21 may be integrated.

  Further, the shapes of the connection terminals 12, 12x, 12y, and 12z shown in the above two embodiments and modifications are examples, and the shapes can be changed as appropriate.

1 Electric wire assembly 2 Flexible flat cable 3 Twisted wire (round wire)
12, 12x, 12y, 12z Connection terminal 20, 20x Flexible flat cable connection part 21 Twisted wire connection part (round wire connection part)
22 Middle part 23 Pierce 41 Twisted wire connection part (Round wire connection part)

Claims (10)

A connection terminal for connecting a flexible flat cable and a round wire,
A substantially flat flexible flat cable connection;
A round wire connecting portion formed in a cylindrical shape into which the conductor and insulating coating at the tip of the round wire can be inserted, and having one end in the axial direction of the cylinder closed;
A connection terminal comprising: A connection terminal for connecting a flexible flat cable and a round wire,
A substantially flat flexible flat cable connection;
Open barrel type round wire connection,
A connection terminal comprising: The connection terminal according to claim 1 or 2,
The connecting terminal according to claim 1, wherein a dimension in a thickness direction of the flexible flat cable connecting portion is smaller than a dimension in a radial direction of a conductor of the round wire inserted into the round wire connecting portion. A connection terminal for connecting a flexible flat cable and a round wire,
A flexible flat cable connecting portion including a piercing capable of penetrating the flexible flat cable in the thickness direction;
A round wire connecting portion formed in a cylindrical shape into which the conductor and insulating coating at the tip of the round wire can be inserted, and having one end in the axial direction of the cylinder closed;
A connection terminal comprising: The connection terminal according to claim 1, 2, or 4,
A connecting terminal, wherein an intermediate portion between the flexible flat cable connecting portion and the round wire connecting portion is formed in a substantially cylindrical shape. The connection terminal according to claim 1 or 4,
The intermediate part between the flexible flat cable connection part and the round wire connection part is formed in a substantially cylindrical shape,
The round wire connecting portion is formed in a cylindrical shape by bending a plate material, but the ends of each are abutted, or the ends are overlapped, and the ends are welded linearly,
The intermediate portion is formed into a cylindrical shape by bending the plate material, but the ends of each are abutted, or the ends are overlapped, and the ends are welded linearly,
The connection terminal, wherein when viewed from a predetermined direction, the linear weld portion of the round wire connection portion and the linear weld portion of the intermediate portion are on the same straight line. The connection terminal according to claim 1;
A flexible flat cable connected to the flexible flat cable connecting portion of the connection terminal;
A round wire connected to the round wire connection portion of the connection terminal;
With
The conductor of the flexible flat cable is welded to the flexible flat cable connecting portion,
The tip of the round wire is inserted into the round wire connecting portion in a state where a part of the insulating coating is removed and the conductor is exposed, and the round wire connecting portion is crimped to the conductor and the insulating coating. Characteristic wire assembly. The connection terminal according to claim 2;
A flexible flat cable connected to the flexible flat cable connecting portion of the connection terminal;
A round wire connected to the round wire connection portion of the connection terminal;
With
The conductor of the flexible flat cable is welded to the flexible flat cable connecting portion,
The wire assembly is characterized in that at the tip of the round wire, the conductor and the insulation coating are pressure-bonded to the round wire connection portion in a state where a part of the insulation coating is removed and the conductor is exposed. Connection terminal according to claim 4,
A flexible flat cable connected to the flexible flat cable connecting portion of the connection terminal;
A round wire connected to the round wire connection portion of the connection terminal;
With
A conductor of the flexible flat cable is penetrated by the piercing of the flexible flat cable connecting portion;
The wire assembly is characterized in that at the tip of the round wire, the conductor and the insulation coating are pressure-bonded to the round wire connection portion in a state where a part of the insulation coating is removed and the conductor is exposed. An electric wire assembly according to any one of claims 7 to 9,
The conductor of the flexible flat cable is made of copper or a copper-based alloy,
The round wire conductor is made of aluminum or an aluminum alloy,
The electric wire assembly, wherein the connection terminal is made of copper or a copper-based alloy.

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