JP3649076B2 - Connector and ground connection structure for connecting shield layer of shielded wire to ground wire - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a connector for connecting a shield layer of a shielded wire and a ground wire and a ground connection structure, and more specifically, to improve the workability of connecting the ground wire to the shielded wire.
[0002]
[Prior art]
FIG. 10 shows a terminal processing operation for grounding a shielded wire. First, as shown in FIGS. 10 (A) and 10 (B), a cut 1b is made in the sheath 1a of the shielded electric wire 1, and the sheath 1a is peeled off so as to form a shield layer between the central electric wire 1c and the sheath 1a. Exposed conductor wire 1d is exposed. Next, as shown in FIGS. 10C, 10D, and 10E, after the conductor wire 1d is twisted and separated from the central electric wire 1c, the tube 3 is sheathed on the exposed portion of the twisted conductor wire 1d. The terminal fitting 2 is crimped to the tip of the conductor wire 1d, and the tube 3 is fixed by winding a tape T between the base of the tube 3 and the outer periphery of the sheath 1a.
[0003]
[Problems to be solved by the invention]
In the conventional shielded wire processing method as described above, many steps are required for the processing operation, so that workability is poor, and the conductor wire 1d of the shield layer may be cut by cutting when the sheath 1a is peeled off. There is. Further, since the end of the conductor wire 1d of the shield layer is easily separated, the conductor wire 1d may protrude and come into contact with other circuits when the terminal fitting 2 is crimped. Moreover, as a shielded electric wire other than the above, as shown in FIG. 11, a shielded electric wire 21 using a conductive foil 21a can be mentioned. In order to ground the conductive foil 21a, a drain wire 21b is provided together with the conductive foil 21a. Therefore, it is necessary to take it out and connect it to a ground wire, which is difficult to work.
[0004]
The present invention has been made in view of the above problems, and provides a connector for connection that enables connection to a ground wire without exposing a shield layer of a shielded wire, and a ground connection structure using the connector for connection. The challenge is to do.
[0005]
[Means for Solving the Problems]
In order to achieve the above object, the present invention firstly includes an upper and lower case in which at least the lower case is made of a highly conductive resin, and a recess for inserting and holding the shielded electric wire is provided on the inner surface of the lower case. A shape in which a large-diameter concave portion through which a shielded electric wire that has not been peeled is inserted and a small-diameter concave portion through which a small-diameter portion of the shielded electric wire from which a shield layer made of a sheath and metal braided wire or metal foil is peeled are connected via a step. In addition, an acute-angled protrusion is provided on the larger-diameter recess side than the step so as to be pierced and connected to the shield layer of the unshielded shielded electric wire, and a terminal portion for ground wire connection is provided. A connector for connecting a shield layer of a shielded wire and a ground wire is provided.
[0009]
According to the said structure, a protrusion part and a shield layer can be made to contact in the state hold | maintained by hold | maintaining a shield electric wire by piercing the protrusion part which consists of highly conductive resin provided in the lower case in the shield layer of a shield electric wire. As a result, the shield layer is connected to the terminal portion of the lower case made of a highly conductive resin through the protrusion, and the terminal metal fitting of the ground wire terminal is fitted and connected to the terminal portion. The ground wire and the shield layer can be connected via the protruding portion and the terminal portion made of conductive resin.
[0010]
In the connector for connection, it is preferable that a plurality of ground wire terminals and terminal portions are provided in a lower case made of a highly conductive resin, and these terminal portions are provided at positions parallel to the length direction of the electric wire.
[0011]
Specifically, the ground wire terminal fittings can be connected from both sides by opening the introduction path for the ground wire terminal fittings to both sides of the case and arranging a pair of terminals on both sides. You can also. If it does in this way, the ground wire connected with the shielded electric wire with the other connector for connection can be connected.
[0013]
Furthermore, this invention provides the connection structure which connected the shielded electric wire to the earth wire using the said connector for a connection. That is, the connection connector is attached to the end of the shielded electric wire, and the protruding portion of the lower case is pierced and connected to the shield layer, while the terminal fitting attached to the end of the ground wire is fitted to the terminal portion of the lower case. By connecting together, the shield layer of the shielded electric wire connecting the ground wire to the shield layer and the ground wire are connected.
[0014]
If it does as mentioned above, if the sheath and the shield layer are peeled off, the connection to the connector for connection can be achieved. Particularly, when the shield layer is made of a metal foil, the metal foil which is difficult to remain can be peeled off with the sheath. Therefore, the shield wire can be easily peeled off. By piercing the projecting portion having the conductivity into the shield layer of the cut surface that has been peeled, the shield layer and the projecting portion can be electrically connected. Therefore, the shield layer of the shield wire can be easily connected to the ground wire by fitting and connecting the terminal fitting of the ground wire terminal to the terminal portion formed of the highly conductive resin integrally with the protruding portion.
[0015]
Any of the connection connectors described above can be easily connected to the ground wire by peeling off the end or intermediate position of the shield wire and inserting it into the connection connector.
[0016]
Also, preparing a plurality of the above connection connectors, attaching other terminal fittings to the other end of the ground wire fitted and connected to the terminal portion of the lower case of one connection connector, the other terminal fittings, By fitting and connecting to the terminal portion of the lower case of the other end connection connector, the shield layers of the plurality of shielded wires can be connected in a chain with ground wires. If it does in this way, the earthing process between several shielded electric wires can be collectively performed in arbitrary places, The processing operation can also be performed only by simple operation.
[0017]
As described above, the case in which the contact portion with the shield layer and the terminal portion connected to the terminal fitting of the ground wire terminal are formed of a highly conductive resin. As disclosed in JP-A-10-237331 and JP-A-11-342522, this highly conductive resin is obtained by mixing metal fibers made of copper, nickel, iron, etc. in a thermoplastic resin. It consists of a conductive resin composition in which lead-free solder (low melting point solder) and a low melting point alloy such as Cu powder are dispersed.
[0018]
Examples of the thermoplastic resin blended with conductive metal fibers include propylene, polyethylene, polystyrene, acrylonitrile / butadiene / styrene resin, modified polyphenylene oxide resin, polybutylene terephthalate resin, polyethylene terephthalate resin, polyamide resin, aromatic polyamide resin, Resins such as polyphenylene sulfide resin, liquid crystal polymer, polyetherimide, polybenzimidazole, polyetheretherketone, polyethersulfone can be used alone or in a blend, especially acrylonitrile / butadiene / styrene resin, polybutylene. A terephthalate resin is preferably used.
[0019]
The low melting point alloy mixed and dispersed in the thermoplastic resin and joined in a network form is an alloy having a melting point of 100 ° C. or higher, preferably 200 ° C. or higher and melted during injection molding. Sn—Pb, Sn -Ag-Pb system, Sn-Bi system, Sn-Bi-In system, Bi-Pb system, Bi-Sn system, Sn-Cu system, Sn-Cu-Ni-P system, Sn-Ag system, Sn-Bi -Pb type and Sn-In type are mentioned.
[0020]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1 and 2 show a connector 10 according to an embodiment of the present invention. The connection connector 10 is for connection between the shield layer 11a of the shielded electric wire 11 and the ground wire 12 shown in FIGS. 3A and 3B, and includes a case 13 made of a highly conductive resin.
[0021]
As shown in FIGS. 2A to 2C, the case 13 includes an upper case 14 and a lower case 15 that are connected to each other via a hinge 13 a so as to be opened and closed, and a lock portion 13 b that includes a locking claw and a locking frame. It can be fixed in a closed state. On the inner surface of the lower case 15, as a recess for inserting and holding the shielded electric wire 11, a large-diameter concave portion 15 a for searching for the shielded electric wire not peeled off, and a shield layer made of a sheath and a metal braided wire or a metal foil A small-diameter concave portion 15b that allows the central electric wire that has been peeled and exposed to be searched is continuously provided through a step.
[0022]
Moreover, the acute-angle-shaped protrusion part 15d which protrudes in the large diameter recessed part 15a side from the both sides of the level | step-difference part 15c for piercing the shield layer 11a of the shielded electric wire 11 is provided. Further, an introduction path 15e for receiving the terminal fitting 12a that is crimped to the terminal of the ground wire 12 to be inserted separately is provided in the mating surface of the upper case 14 and the lower case 15, and one of the introduction paths 15e is recessed. A lance 15f and a terminal portion 15g for locking and holding the terminal fitting 12a are provided on the inner surface.
[0023]
On the inner surface of the upper case 14, a recess 14a for inserting and holding the shielded electric wire and an introduction path 15e for searching and holding the ground wire are formed. 3A shows the configuration of the shielded electric wire 11 used in the connection process described below, and FIG. 3B shows the configuration of the ground wire 12.
[0024]
The shielded electric wire 11 of the first embodiment uses a shield layer 11a made of a metal foil.
[0025]
A connection structure between the shield layer 11a of the shielded electric wire 11 and the ground wire 12 using the connection connector 10 having the above configuration will be described. As shown in FIGS. 4 (A) and 4 (B), first, a notch 11d is made in a required portion of the shielded electric wire 11 to be connected, and the sheath 11b and the shield layer 11a made of metal foil are peeled off to remove the central electric wire 11c. Expose. Next, as shown in FIG. 4 (C), the protrusion 15d provided on the lower case 15 is pierced and connected to the shield layer 11a made of the metal foil of the shield wire 11, and the shield wire 11 is fitted into the large-diameter recess 15a. The central electric wire 11c is guided to the small-diameter concave portion 15b and taken out outward.
[0026]
Then, as shown in FIG. 4D, the upper case 14 is fixed on the lower case 15. Then, as shown in FIG. 5, the shielded electric wire 11 is securely held by the upper case 14 and the lower case 15, and conduction is achieved between the shield layer 11a and the protruding portion 15d. Next, as shown in FIGS. 4E and 4F, a separately prepared terminal fitting 12a of the ground wire 12 is introduced into the introduction path 15e. As shown in FIG. 6, the introduced terminal fitting 12a is engaged and connected to the terminal portion 15g of the lower case 15, and at the same time, is latched and held in the introduction path 15e by the lance 15f. In this way, the shield layer 11a of the shielded electric wire 11 is connected to the ground wire 12 via the projection 15d and the terminal 15g provided on the lower case 15.
[0027]
Further, in order to perform ground connection of a plurality of shielded wires 11A, 11B, and 11C using the connection connector 10, as shown in FIG. 7, each shielded wire 11A, 11B, and 11C is connected to the example shown in FIG. Similarly, the connecting connectors 10A, 10B, and 10C are attached, and the protrusions 15Ad, 15Bd, and 15Cd of the respective lower cases are pierced and connected to the shield layers 11Aa, 11Ba, and 11Ca. Then, one end of the ground wire 12A is connected to the terminal portion 15Ag of the connection connector 10A via the terminal fitting 12Aa, and the other end terminal fitting 12Ab is connected to the terminal portion 15Bg of the adjacent connection connector 10B.
[0028]
Further, the other end of the terminal portion 15Bg is connected to the terminal fitting 12Ba at one end of the other ground wire 12B, and the other end fitting 12Bb is connected to the terminal portion 15Cg of the adjacent connector 10C. In this way, the shielded wires 11A, 11B, and 11C are connected to the ground wires 12A and 12B. Further, by connecting the terminal fitting 12Ca at the other end of the ground wire 12C having the ground joint connector 17 attached to one end to the other end of the terminal portion 15Ag of the connecting connector 10A, each shielded wire 11A, 11B, 11C. The shield layers 11Aa, 11Ba, and 11Ca are grounded in a chain form.
[0029]
In the above-described embodiment, the connection connector 10 is applied to the shield layer 11a of the shielded electric wire 11 made of a conductor foil. However, the connection connector 10 can be similarly applied to a braided wire or a conductor wound with a conductor wire. is there. Moreover, when using the connector 10 for connection of this invention with respect to the shielded electric wire 21 shown in FIG. 11, it does not require the drain wire 21b, but pierces the projection part provided in the lower case, and is highly conductive. The conductor foil 21a and the ground wire 12 can be connected via a member.
[0030]
In the above embodiment, one connector is provided with one shield wire and one ground wire insertion holding portion. However, by connecting two or more of them in parallel, a case 13 of one connector is provided. The shield layers 11a of the plurality of shielded wires 11 and / or the plurality of ground wires 12 may be interconnected. In the above embodiment, the connection to the ground wire 12 is performed by male and female terminal fitting. However, any connecting means such as bolt tightening may be employed, and the connection part is a case. It may be performed either inside or outside of 13.
[0031]
FIG. 8 shows a connector 20 according to a reference embodiment of the present invention. Like the first embodiment, it is made of a highly conductive resin, but as a difference from the connection connector 10 of the first embodiment, there is provided an acute-angled protrusion 15d for piercing the shield layer 11a of the shield 11 electric wire. Not to mention. Other than that, it is the same form as the first embodiment. The shielded electric wire 11 of the reference embodiment uses a shield layer 11a made of a metal braided wire.
[0032]
A connection structure between the shield layer 11a of the shielded electric wire 11 and the ground wire 12 using the connection connector 20 having the above configuration will be described. As shown in FIGS. 9A and 9B, first, a cut 11d is made in a required portion of the shielded electric wire 11 to be connected, the sheath 11b is peeled off, and the shield layer 11a made of a metal braid is formed as a conductive layer. Then, it is exposed so as to cover the central electric wire 11c.
[0033]
Next, as shown in FIG. 9C, the shielded wire 11 is fitted and held in the large-diameter recess 25a provided in the lower case 25, and the shield layer 11a exposed from the shielded wire 11 is exposed to the inner surface of the small-diameter recess 25b. After the contact, the upper case 24 is covered. Thereby, conduction can be achieved between the shield layer 11 a and the lower case 25. Then, similarly to the ground wire connection step (FIGS. 4D, 4E and 4F) of the first embodiment, the terminal portion 25g provided in the lower case 25 and the terminal fitting 12a of the ground wire terminal are fitted and connected. The earth wire 12 is connected to the shield layer 11a of the shielded electric wire 11 simply by making it.
[0035]
【The invention's effect】
As is clear from the above description, according to the present invention, when connecting the shield layer of the shielded wire and the ground wire, it is not necessary to cut the sheath or twist the shield layer. The workability of the processing operation can be improved. Also, when grounding between a plurality of shielded wires, each shielded wire can be grounded in a chain by simply attaching a connector for connection to each shielded wire and connecting them with a ground wire. It is possible to easily cope with various complicated ground connection forms.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a connector for connection according to an embodiment of the present invention.
2A is a front view of the connector for connection according to the embodiment, FIG. 2B is a rear view, and FIG. 2C is a plan view of a state in which a case is opened;
3A is a diagram showing a shielded electric wire, and FIG. 3B is a diagram showing a ground wire.
FIGS. 4A to 4F are diagrams illustrating a connection process of a shielded wire, a ground wire, and the connector of the first embodiment. FIGS.
5 is a cross-sectional view taken along the line XX in FIG.
6 is a YY cross-sectional view of FIG.
FIG. 7 is a diagram showing a connection state between a plurality of shielded wires and ground wires.
FIG. 8 is a plan view showing a state in which the case of the connection connector of the reference embodiment is opened.
FIGS. 9A to 9C are diagrams illustrating a connection process between a shielded wire and a connector according to a reference embodiment; FIGS.
FIGS. 10A to 10E are diagrams showing a conventional example.
FIG. 11 is a diagram showing a conventional example.
[Explanation of symbols]
10, 10A, 10B, 10C Connector 11 Shielded wire 11a, 11Aa, 11Ba, 11Ca Shield layer 11b Sheath 11c Central wire 12, 12A, 12B, 12C Ground wire 12a, 12Aa, 12Ab, 12Ba, 12Bb, 12Ca Terminal fitting 13 Case 14 Upper case 15 Lower case 15a Large-diameter recess 15b Small-diameter recess 15d Protrusion 15g Terminal

Claims (5)

Comprising upper and lower cases is made of highly conductive resin at least the lower case, a recess for inserting holding the shielded wire to the inner surface of the lower case, the concave portion, and a large-diameter concave portion for inserting the shielded electric wire which is not stripped skin and a small-diameter recess for inserting the small diameter portion of the shield electric wire stripping the shielding layer made of sheath gold genus braided wire or a metal foil in a shape obtained by continuously via a step, and an acute angle from the step to the large-diameter concave portion The shield layer of the shielded electric wire and the ground are provided with a protruding portion in the shape of the shield, and pierced and connected to the shield layer of the shielded electric wire not peeled off, and provided with a terminal portion for connecting the ground wire Connector for connection with wire. The shield of the shielded electric wire according to claim 1, wherein a plurality of terminal portions for connecting the ground wire are provided on the lower case made of the highly conductive resin, and these terminal portions are provided at positions parallel to the length direction of the electric wire. Connector for connection between layer and ground wire. A ground connection structure using the connection connector according to claim 2, wherein the connection connector is attached to a terminal of a shielded electric wire, and the exposed conductive layer of the shielded electric wire is disposed on the inner surface of the small-diameter concave portion of the lower case. On the other hand, the terminal fitting attached to the end of the ground wire is fitted and connected to the terminal portion of the lower case, so that the shield wire of the shielded wire connecting the ground wire to the shield layer is connected to the ground wire. Ground connection structure. A ground connection structure using the connection connector according to claim 1 or 2 ,
Attach the connection connector to the end of the shielded wire and connect the protruding part of the lower case by piercing the shield layer, while fitting the terminal fitting attached to the end of the ground wire with the terminal part of the lower case By doing so, a ground connection structure between the shield layer and the ground wire of the shielded wire in which the ground wire is connected to the shield layer. Prepare a plurality of the connection connectors, attach another terminal fitting to the other end of the ground wire that is fitted and connected to the terminal portion of the lower case of one connection connector, and attach the other terminal fitting to the other end. 5. The connecting layer according to claim 3 or 4, wherein the shield layers of the shielded electric wires of the plurality of connection connectors are connected in a chain with ground wires by fitting and connecting to the terminal portions of the lower case of the connection connector. Ground connection structure between the shield layer of the shielded wire and the ground wire.

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