JPH0896919A - Shield cable terminal connecting device - Google Patents

Abstract

PURPOSE: To enable electric connection without dropping insulation capacity of an insulating cover by providing a metallic plate which has a catch for catching a metallic shield layer with elastic force in contact and a connector for electrically connecting other conductor. CONSTITUTION: This shield cable terminal connecting device is equipped with a connector 7a, which becomes a mounting terminal at the time of soldering an external cable 5, consisting of a brass plate, a catch 7B, which catches a shield cable 3, and others. And, the wires 3 of two shield cables are electrically connected with each other by peeling off the outside cover 4 and exposing the shield cable 3 and catching its section with the part 7B. Next, the heat during soldering is dispersed by connecting the external cable 5 to the shield cable terminal connecting device 7 by solder 7, and the head can be prevented from being conducted directly to the insulating cover 2. Furthermore, the number of used cables 5 and devices 7 can be reduced by binding a plurality of shield cables en block, so the connection work can be simplified.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a terminal connecting device for a shielded cable, and more particularly to a technique for electrically connecting the insulating cable provided on the terminal connecting portion of the shielded cable without lowering the insulating ability. It relates to technology that is effective when applied.

[0002]

2. Description of the Related Art The present inventor has studied a technique for electrically connecting a shielded electric wire and an external electric wire at a terminal portion of a shielded cable. The following is a prior art examined by the present inventor, although it is not a known technique,
The outline is as follows.

A technique for electrically connecting a shield electric wire and an external electric wire at the end portion of the shielded cable is to directly connect the shield electric wire 3 and the external electric wire 5 at the end portion of the shield cable by soldering as shown in FIG. It shows the technique to do. In FIG. 11, 1 is a shielded cable core wire, 3 is a shielded wire, 2 is an insulation coating for insulating the core wire 1 and the shielded wire 3, 4 is an outer cover, 5 is an outer wire, 6 is solder, 8 is a connector, 9 is The signal connection terminal of the connector 8 is shown.

As a countermeasure for this, there is a method of crimping the shielded electric wire 3 and the external electric wire 5 with a crimping member to connect them. In FIG. 12, 1 is a core of a shielded cable, 2
Is an insulating coating, 3 is a shielded wire, 4 is an external coating, 5 is an external wire, 10 is a manual crimping jig, and 11 is a crimping member.

[0005]

DISCLOSURE OF THE INVENTION As a result of examining the above prior art, the present inventor found the following problems.

In the connection technique by soldering shown in FIG. 11, when the external electric wire 5 is directly soldered to the shielded electric wire 3, the insulating coating 2 having a melting temperature lower than that of the solder 6 is melted and the core wire 1 and the shielded electric wire 3 are melted. There is a problem in that the insulation capability of the insulation coating 2 that insulates is reduced and insulation failure is likely to occur.

When the crimping member 11 shown in FIG. 12 is used, a general-purpose jig such as a screwdriver cannot be used for crimping the shield portion 3 and the external electric wire 5, but a dedicated crimping jig 10 or the like can be used. A jig is needed.

An object of the present invention is to provide a technique capable of making electrical connection without deteriorating the insulating ability of the insulating coating.

Another object of the present invention is to provide a technique capable of collectively terminating a plurality of shielded cables.

The above and other objects and novel features of the present invention will be apparent from the description of this specification and the accompanying drawings.

[0011]

Of the inventions disclosed in the present application, a representative one will be briefly described below.
It is as follows.

The core wire is covered with an insulator, a metal shield layer is provided on the covered insulator, and a metal shield layer of a shielded cable provided with a protective cover layer thereon is electrically connected to another conductor. A terminal connecting device for at least 1
It is composed of a metal plate having a sandwiching portion for sandwiching and contacting the metal shield layer of the above cables with an elastic force and a connecting portion for electrically connecting another conductor.

[0013]

According to the above-mentioned means, the shielded wire of the shielded cable and the external electric wire are provided by having the shape in which the metal shield layer is sandwiched and in contact with each other and having the connecting portion for electrically connecting the other electric wire. Since the heat at the time of soldering is dispersed and the heat transferred to the insulation coating is minimized, it is possible to prevent the insulation ability of the insulation coating from deteriorating.

[0014]

Embodiments of the present invention will be described below in detail with reference to the drawings.

In all the drawings for explaining the embodiments, parts having the same function are designated by the same reference numerals, and the repeated description thereof will be omitted.

(Embodiment 1) FIG. 1 is a perspective view showing a schematic structure of Embodiment 1 in which the present invention is applied to an end portion of a shielded cable. 1 is a core wire of a shielded cable and 3 is a shielded electric wire (metal shield). Layer), 2 is an insulation coating for insulating the core wire 1 and the shielded wire 3, 4 is an outer coating which is a protective coating layer of the shielded cable, 5 is an external wire, 6 is solder, and 7 is a shielded cable terminal connecting device. .

In the first embodiment according to the present invention, as shown in FIG. 1, the shielded electric wire 3 and the external electric wire 5 at the end portions of two shielded cables are connected via a shielded cable terminal connecting device 7.

The shielded cable terminal connecting device 7 comprises:
As shown in FIG. 2, a connecting portion 7A, which is made of a brass plate and serves as a mounting terminal when soldering the external electric wire 5, a holding portion 7B for sandwiching the shielded electric wire 3, and adjacent cables are completely separated and fixed one by one. The restraint portion 7C and the elastic portion 7D having elasticity by a spring are integrally formed.

The connecting portion 7A of the shielded cable terminal connecting device 7 is composed of a flat portion of the end portion of the brass plate and has a sufficient space for soldering the external electric wire 3. next,
The sandwiching portion 7B is formed continuously with the connecting portion 7A and has a structure in which two semi-cylindrical shapes perpendicular to the longitudinal direction of the brass plate are opposed to each other, and the inner diameter thereof is substantially the same as the outer circumference of the shielded wire 3. It has become. By sandwiching the shielded electric wire 3 between the facing semi-cylindrical portions, electrical connection is established. The restraint portion 7C includes two adjacent holding portions 7B.
At the same time as fixing the sandwiched shielded electric wire 3 by the convex portion located in the middle, the contact area with the shielded electric wire 3 is increased to reduce the contact resistance. Elastic part 7D
2 has a structure in which a portion continuous with the sandwiching portion 7B farther from the connecting portion 7A is bent into a U shape to form a curved shape as shown in FIG. 2 to have elasticity. With this structure, a force for sandwiching the shielded electric wire 3 of the sandwiching portion 7B is generated. However, this structure has a diameter that makes almost complete contact with the shielded electric wire 3 when the shielded electric wire 3 is sandwiched between the sandwiching portions 7B.

Next, referring to FIGS. 1 and 2, the method of use and the operation of the shielded cable terminal connecting device 7 of the first embodiment will be described. The sandwiching portion 7B of the shielded cable terminal connecting device 7 shown in FIG. As shown in FIG. 1, the outer coating 4
The shielded electric wire 3 is exposed by peeling off and the exposed portion is sandwiched to electrically connect the shielded electric wires 3 of the two shielded cables. Next, by connecting the external electric wire 5 to the shielded cable terminal connecting device 7 with the solder 6, it is possible to prevent the heat at the time of soldering from being dispersed and directly transmitted to the insulating coating 2. As a result,
It is possible to prevent the insulation performance from being deteriorated due to the dissolution of the insulation coating 2.

Furthermore, by collectively bundling a plurality of shielded cables, the number of external electric wires 5 and connecting devices 7 used can be reduced, so that the connecting work can be simplified.

Further, since the connection work can be simplified, human error can be reduced, and the reliability of the connection between the external electric wire 5 and the shielded electric wire 3 is improved.

(Embodiment 2) As shown in FIG. 3, the shielded cable terminal connecting device 7 according to the second embodiment is similar to that of the first embodiment.
2 further includes a shield cable terminal connecting device 7 including a connecting portion 7A, a sandwiching portion 7B, a restraining portion 7C, and an elastic portion 7D, and a fixing portion for connecting the shielded electric wire 3 to a housing or a ground-dedicated terminal. 7E is provided. The fixing portion 7E is formed by molding a part of the elastic portion 7D which is formed continuously from the sandwiching portion 7B in the same manner as the connecting portion 7A, and is folded in two from the middle to be in close contact with each other, and a hole for screwing is further formed. It is provided.

Next, referring to FIG. 3, the method of use and the operation of the shielded cable terminal connecting device 7 of the second embodiment will be described. In a device in which the casing is grounded, the fixing portion 7E is directly screwed to the casing. Connect to the body. Next, by connecting the shielded electric wire 3 and the external electric wire 5 according to the procedure shown in the first embodiment, the number of electric wires connecting the housing and the shielded electric wire 3 can be reduced. As a result, the connection work can be simplified.
Furthermore, by performing the soldering work after connecting to the housing, the heat at the time of soldering can be radiated to the housing, so that the heat applied to the insulating coating 2 can be reduced. As a result, the reliability of the insulating coating 2 is improved as compared with the first embodiment.

(Embodiment 3) As shown in FIG. 4, the shielded cable terminal connecting device 7 of the third embodiment has the same structure as that of the first embodiment.
The shielded cable terminal connecting device 7 including the connecting portion 7A, the sandwiching portion 7B, the restraining portion 7C, and the elastic portion 7D shown in FIG. 2 is further provided with a screw tightening portion 7F. The screw tightening portion 7F is a restraint portion 7 sandwiched by two sandwiching portions 7B.
C is provided with a screw thread so that the screw can be directly tightened. In the present embodiment, the position of the screw tightening portion 7F is the position of the fixing portion 7C, but it can be applied to the connecting portion 7A.

Next, referring to FIG. 4, the method and operation of using the shielded cable terminal connecting device 7 of the third embodiment will be described. The shielded electric wires 3 are respectively attached to the holding portions 7B of the shielded cable terminal connecting device 7 shown in FIG. Sandwich and make an electrical connection. Next, by tightening the screw of the screw tightening portion 7F, the force for sandwiching the shielded wire 3 of the sandwiching portion 7B can be strengthened. As a result, it is possible to prevent the shielded cable from coming off the shielded cable terminal connecting device 7.

(Embodiment 4) As shown in FIG. 5, the shielded cable terminal connecting device 7 of the embodiment 4 is the same as the embodiment 1 described above.
2 further includes a shield cable terminal connecting device 7 including a connecting portion 7A, a sandwiching portion 7B, a restraining portion 7C, and an elastic portion 7D, and a clamp portion 7G for holding the shielded electric wire 3 therein.
Is provided. The clamp portion 7G is a holding portion 7
Saw-toothed clamps are provided on both sides of B at right angles to the gripping direction of the shielded electric wire 3.

Next, referring to FIG. 5, the method and operation of the shielded cable terminal connecting device 7 of the fourth embodiment will be described. The shielded wire 3 is sandwiched between the sandwiching portions 7B of the shielded cable terminal connecting device 7 shown in FIG. This makes it possible to prevent the clamp portion 7G from gripping the shielded electric wire 3 and detaching the shielded cable from the shielded cable terminal connecting device 7.

(Embodiment 5) As shown in FIG. 6, the shielded cable terminal connecting device 7 of the embodiment 5 is the same as the embodiment 1 described above.
The shield cable terminal connecting device 7 including the connecting portion 7A, the sandwiching portion 7B, the restraining portion 7C, and the elastic portion 7D shown in FIG. 2 is further provided with a heat radiating portion 7H in the vicinity of the connecting portion 7A. The heat radiating portion 7H is provided by suspending a part of the sandwiching portion 7B following the connecting portion 7A from the shape of the outer peripheral portion of the shielded cable. However, heat dissipation part 7H
Alternatively, they may be molded separately and then attached by spot welding or the like.

Next, referring to FIG. 6, the method and operation of using the shielded cable terminal connecting device 7 of the fifth embodiment will be explained. When the external electric wire 5 is soldered to the connecting portion 7A, a part of the heat is radiated. It can be released into the air from the portion 7H. As a result, the heat transmitted to the insulating coating 3 can be further reduced as compared with the first embodiment. Thereby, the insulation reliability of the insulation coating 3 can be further improved.

(Embodiment 6) As shown in FIG. 7, the shielded cable terminal connecting device 7 of the present embodiment 6 has a connecting pin portion 7.
K, a sandwiching portion 7B, a restraining portion 7C, and an elastic portion 7D. The connection pin portion 7K is parallel to the clamped shielded cable and has a thin tip portion so that connection to the connector is facilitated.

On the other hand, FIG. 8 is a perspective view in which the shielded cable terminal connecting device 7 of the sixth embodiment is applied to the connection of a shielded cable and a connector. 1 is a core wire of a shielded cable, 2 is an insulating coating layer, and 3 is a shielded wire. Reference numeral 4 is an outer coating, 6 is solder, 8 is a connector, and 9 is a signal connection terminal.

Next, a sixth embodiment based on FIGS. 7 and 8.
The use and effect of the shielded cable terminal connecting device 7 will be described. As shown in FIG. 8, the shielded wire 3 from which the outer coating 4 has been stripped is inserted into the holding portion 7B of the shielded cable terminal connecting device shown in FIG. Thus, the shielded electric wires 3 of the two shielded cables are electrically connected.
Next, since the core wire 1 and the connection pin portion 7K are respectively connected to the signal connection terminals 9 of the connector, the signal connection terminals 9 are connected to the shielded cable terminal connection device 7 of the present invention in addition to the effects shown in the first embodiment. The electric wire for doing so is unnecessary, and the connection work can be reduced.

(Embodiment 7) As shown in FIG. 9, the shielded cable terminal connecting device 7 of the embodiment 7 is the same as the embodiment 6 described above.
The shielded cable terminal connecting device 7 shown in is applied to the case where one shielded cable is used.
K, a sandwiching portion 7B, and an elastic portion 7D. At this time, the connection pin portion 7K is parallel to the clamped shielded cable as in the sixth embodiment, and has a thin tip portion so as to facilitate connection to the connector.

On the other hand, FIG. 10 is a perspective view in which the shielded cable terminal connecting device 7 of the seventh embodiment is applied to the connection of a shielded cable and a connector. 1 is a core wire of a shielded cable, 2 is an insulating coating layer, and 3 is a shielded wire. Reference numeral 4 is an outer coating, 6 is solder, 8 is a connector, and 9 is a signal connection terminal.

Next, the usage and operation of the shielded cable terminal connecting device 7 according to the seventh embodiment will be described with reference to FIGS. 9 and 10. FIG. 10 shows the holding portion 7B of the shielded cable terminal connecting device shown in FIG. As shown in FIG.
By sandwiching the shielded electric wire 3 peeled off, the shielded electric wire 3 of the shielded cable is electrically connected. Next, since the core wire 1 and the connection pin portion 7K are respectively connected to the signal connection terminals 9 of the connector, an electric wire for connecting the signal connection terminals 9 and the shielded cable terminal connection device 7 is not necessary as in the case of the sixth embodiment. , Connection work can be reduced.

Furthermore, the shielded cable terminal connecting device 7
The sandwiching portion 7B of No. 2 is two in Embodiments 1 to 6, but
It goes without saying that the present invention can be applied to the number of the sandwiching portions 7B being one, and further to three or more, as shown in the seventh embodiment, depending on the number of shielded cables used.

The inventions made by the present inventors are as follows.
Although the present invention has been specifically described based on the above-mentioned embodiments, the present invention is not limited to the above-mentioned embodiments, and it goes without saying that various modifications can be made without departing from the scope of the invention.

[0039]

The effects obtained by the typical ones of the inventions disclosed in the present application will be briefly described as follows.

(1) It is possible to prevent dissolution of the insulation coating of the shielded cable when soldering the shielded wire portion of the shielded cable and the external electric wire (which may be a terminal such as a connector). Thereby, the insulation reliability of the core wire and the shielded electric wire can be improved.

(2) Since a plurality of shielded cables can be bundled together, connection work can be reduced.

(3) Since the number of connection work points can be reduced, it is possible to improve the connection reliability between the shielded electric wire portion of the shielded cable and the external electric wire.

[Brief description of drawings]

FIG. 1 is a perspective view for explaining a configuration of a first embodiment in which the present invention is applied to an end portion of a shielded cable.

FIG. 2 is a perspective view showing the configuration of the shielded cable terminal connecting device according to the first embodiment of the present invention.

FIG. 3 is a perspective view showing a configuration of a shielded cable terminal connecting device according to a second embodiment of the present invention.

FIG. 4 is a perspective view showing a configuration of a shielded cable terminal connecting device according to a third embodiment of the present invention.

FIG. 5 is a perspective view showing a configuration of a shielded cable terminal connecting device according to a fourth embodiment of the present invention.

FIG. 6 is a perspective view showing a configuration of a shielded cable terminal connecting device according to a fifth embodiment of the present invention.

FIG. 7 is a perspective view showing a configuration of a shielded cable terminal connecting device according to a sixth embodiment of the present invention.

FIG. 8 is a perspective view in which the sixth embodiment is applied to an end portion of a shielded cable.

FIG. 9 is a perspective view showing the configuration of a shielded cable terminal connecting device according to a seventh embodiment of the present invention.

FIG. 10 is a perspective view in which the seventh embodiment is applied to an end portion of a shielded cable.

FIG. 11 is a diagram for explaining a conventional method for directly soldering a shielded electric wire and an external electric wire.

FIG. 12 is a diagram for explaining a method of connecting a shielded electric wire and an external electric wire using a conventional crimping member.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Core wire of shielded cable, 2 ... Insulation coating, 3 ... Shield electric wire, 4 ... External coating, 5 ... External electric wire, 6 ... Solder, 7
… Shielded cable terminal connection device, 7A… Connection part, 7B
... pinching part, 7C ... restraining part, 7D ... elastic part, 7E ... fixing part, 7F ... screw tightening part, 7G ... clamp part, 7H ... heat dissipation part, 7K ... connection pin part, 8 ... connector, 9 ... signal connection terminal 10 ... Manual crimping jig, 11 ... Crimping member.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Tsuguo Takanashi 1 Horiyamashita, Hinoyama, Hadano, Kanagawa Pref., General Computer Division, Hitachi, Ltd. (72) Toshio Sato 1st, Horiyamashita, Hadano, Kanagawa Tate Works General Computer Division

Claims (3)

[Claims] 1. A metal shield layer of a shielded cable in which a core wire is covered with an insulator, a metal shield layer is provided on the covered insulator, and a protective cover layer is provided thereon, and another conductor is electrically connected. A terminal connecting device for connecting to a wire, which has a holding portion for holding the metal shield layer of at least one or more cables by elastic force and making contact, and a connecting portion for electrically connecting another conductor. A shielded cable terminal connecting device characterized by being made of a plate. 2. The shielded cable terminal connecting device according to claim 1, further comprising a heat radiating portion for radiating heat applied to the connecting portion. 3. The shielded cable terminal connecting device according to claim 1, further comprising a screw tightening portion for compensating the holding force of the holding portion.