JP2002270309A - Terminal treatment structure of shield cable - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a terminal treatment structure of a shield cable wherein the terminal treatment of the shield cable having a drain wire is simply carried out and downsizing of a connector to house the shielded cable terminal part can be made. SOLUTION: A metallic ring 20 is mounted on a peripheral face of insulating sheath 18 of a connecting terminal of the shield cable 10, and the drain wire 14 is folded whose insulating sheath is peeled off to be exposed in the terminal of the cable 10, and this terminal of the folded drain wire 14 is put on the metallic ring 20, and the terminal of the folded drain wire 14 is pinched and retained by conductor barrels 54L, 54R installed in a conducting state to an outer conductor shell 50 together with the metallic ring 20.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a terminal processing structure of a shielded cable, and more particularly to a terminal processing structure of a drain line in a connector terminal portion of a shielded cable having a drain line in addition to a signal line.

[0002]

2. Description of the Related Art Conventionally, as a terminal processing structure for connecting a shielded cable having a drain wire to a connector, for example, Japanese Patent Application Laid-Open Nos.
JP-A-310218 or JP-A-7-37437
No. 6,009,036. In these publications, a terminal dedicated to a drain is connected to a terminal portion of a drain wire, the connected drain terminal is accommodated in a shielded connector, and a metal for shielding a terminal portion of a shielded cable is used. And a drain wire is electrically connected to an outer conductor shell made of a metal. The terminal processing structure will be described with reference to FIG.

[0003] The terminal connection structure shown in FIG.
The insulating inner covering 106 at the terminal portion of each signal line 102 of the shielded cable 100 composed of two signal lines 102 and one drain line 108 is peeled to expose the conductor 104, and this conductor 104 is connected to an inner conductor terminal. A conductor barrel 132 provided on the inner conductor terminal 130 is connected to the conductor 130 so as to squeeze and hold the conductor 104, and a signal line barrel 134 provided behind the inner conductor terminal 130 provides insulation insulation of the signal line 102. Hold the portion 106,
On the other hand, the terminal portion of the drain line 108 is also exposed, and the exposed terminal portion of the drain line 108 is connected to the drain terminal 12.
0, is held by a drain wire barrel 122 provided at the drain terminal 120, and is shielded by an insulation barrel 124 integrally provided behind the drain terminal 120.
Of the insulating jacket 110 is sandwiched.

The thus connected shielded cable 10
0, the inner conductor terminal 130 to which the signal line 102 is connected and the drain terminal 120 to which the drain line 108 is conductively connected are connected to the terminal accommodating chambers 142a, 142b, and 144 provided in the dielectric housing 140. The dielectric housing 140 is further covered with an outer conductor shell 150 in order to cover the terminal connection portion of the shielded cable 100. At this time, the contact portions 128, 128 formed on the rear end edges of the shell connection portions 126, 126 provided integrally between the drain terminal 120 and the insulation barrel 124 are connected to the outer conductor shell 15.
By making contact with 0, the drain wire 108 and the outer conductor shell 150 are electrically connected and the terminal connection portion of the shielded cable is shielded, so that the terminal processing structure of the shielded cable is configured.

[0005]

However, according to the structure for terminating the shielded cable having such a configuration, the terminal connection of the drain wire is performed by a process such as welding or soldering. When an external force is applied to the wire, there is a possibility that the connection portion of the drain line may be disconnected, and there is a problem that connection reliability is lacking.

In the terminal treatment structure as shown in FIG. 5, since the insulation barrel provided at the drain terminal directly holds the insulation jacket, the insulation barrel is deformed by high-temperature shrinkage or the like. When the deterioration occurs, the holding force of the insulation barrel against the insulation jacket is weakened, and there is a problem that the reliability of connection of the shield cable terminal portion cannot be sufficiently maintained.

Furthermore, in the conventional terminal processing structure, it is necessary to provide an accommodating portion for accommodating the terminal dedicated to the drain line, and the size of the dielectric housing accommodating these connection terminals is equal to the capacity of the accommodating portion. However, as a result, the size of the shield connector as a whole increases. Also incidental to this is:
In order to connect the drain wire to the dedicated terminal, connection work such as welding or soldering is required, which takes time for the assembly process and increases the number of parts. There is a problem that it hinders the improvement.

SUMMARY OF THE INVENTION It is an object of the present invention to improve the reliability of connection of a terminal portion of a shielded cable including a drain wire and to provide a drain terminal and the like when connecting the drain wire to an outer conductor shell. The present invention is intended to improve the working efficiency by reducing the size of the shielded connector and reducing the number of parts by conducting the conductive connection with the outer conductor shell.

[0009]

According to a first aspect of the present invention, there is provided a shielded cable terminal processing structure, which is provided on a peripheral surface of an insulation jacket on a connection terminal side of a shielded cable. A metal ring is attached, the insulating jacket is peeled off, and the drain wire exposed on the terminal side of the cable is folded back, and the terminal portion of the folded drain wire is applied on the metal ring to conduct with the outer conductor shell. The gist of the present invention is that the terminal portion of the drain wire is clamped and held together with a metal ring by a conductor barrel provided in a state.

According to the shielded cable end treatment structure having the above-described structure, the exposed drain wire end portion is clamped and held by the conductor barrel with the metal ring mounted on the peripheral surface of the insulating jacket as an underlay. Therefore, even if the insulation jacket is deteriorated or deformed due to high-temperature shrinkage or the like, the drain wire is surely kept in a state of being clamped together with the metal ring by the conductor barrel. The continuity connection between the outer conductor shell and the continuity connection is maintained. With such a terminal treatment structure of a shielded cable clamped between a metal ring and a conductor barrel, it is possible to provide higher connection reliability of the drain wire as compared with the conventional terminal treatment structure by welding or soldering. It is possible to further improve the connection reliability between the shielded cable terminal portion and the connector member.

According to the terminal treatment structure of the shielded cable having the above configuration, the exposed drain wire of the terminal portion is folded back on the metal ring mounted on the outer peripheral surface of the insulating jacket and is held by the conductor barrel. Therefore, there is no need to provide a terminal dedicated to the drain wire as in the case of the conventional terminal connection of the drain wire and to take measures such as welding or soldering to this terminal, and it is not necessary to take any other means. Since the conductive connection to the conductor shell is extremely simple, workability in terminating the shielded cable can be greatly improved.

Further, since the drain wire of the terminal portion is folded back on the metal ring and accommodated in the outer conductor shell,
The terminal dedicated to the drain line as in the conventional terminal processing structure is not required, and the terminal receiving chamber on the dielectric side for accommodating the drain terminal is not required.Thus, the size of the dielectric and the shield connector as a whole can be reduced. It becomes possible to plan.

[0013] In the terminal treatment structure of the shielded cable, it is preferable that the conductor barrel is provided integrally with the outer conductor shell.
If the conductor barrel is integral with the outer conductor shell, work efficiency is good and the number of parts is reduced, so that workability and productivity in terminal processing of the shielded cable can be improved.

According to a third aspect of the present invention, a resin mold is formed on the base end side of the signal line and the folded drain line exposed on the terminal side of the shielded cable by peeling the insulating jacket. Good. If a resin mold is applied to the base end side of the exposed signal line and drain line, not only the strength of the terminal connection portion of the shielded cable is improved, but also the drain line is fixed and held in a folded state. Therefore, it is possible to prevent the drain wire from returning to the original state due to the elasticity at the time of the work of connecting the terminal of the drain wire, and the work of connecting the terminal of the drain wire can be performed more smoothly.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below in detail with reference to the drawings.

FIG. 1 is a perspective view showing a terminal processing step of inverting a drain wire of a shielded cable terminal portion having a drain wire, and FIG. 2 is an exploded perspective view of a connector member for connecting the terminal portion of the shielded cable. FIG. FIG. 3 is a perspective view showing a state in which a shield cable terminal is connected to the connector member shown in FIG. FIGS. 4A and 4B are cross-sectional views showing a connection process of the shielded cable terminal portion shown in FIG.

The shielded cable 10 used in the present embodiment
Are two signal lines 12 each composed of a conductor 12a and an insulating inner cover 12b surrounding the conductor 12a, one drain line 14 formed by twisting a plurality of element wires, and these signal lines 12 and drain lines 1
The metal foil 16 covers the periphery of the metal foil 4 collectively, and the insulating jacket 18 covers the metal foil 16.

First, the metal foil 16 and the insulating jacket 18 at the end of the shielded cable 10 are peeled off, and the signal line 12 is removed.
And the drain line 14 is exposed. Here, the exposed drain wire 14 is coated with Sn (tin) on the surface so that each twisted element wire does not disperse.

Next, as shown in FIG. 1, an open barrel type having a substantially U-shaped cross section is provided on the peripheral surface of the insulating jacket 18 at the end of the shielded cable 10 where the signal line 12 and the drain line 14 are exposed. The metal ring 20 is crimped into a cylindrical shape and mounted. After the metal ring 20 is attached, the exposed drain wire 14 is folded back toward the insulating jacket 18, and the terminal portion is applied to the metal ring 20.

With the drain line 14 folded back in this way, the base end of the exposed signal line 12 and the terminal portion of the insulating jacket 18 are collectively formed of a resin mold M using a hot melt material.
To form a coating. Due to the formation of the coating of the resin mold M, the strength of the terminal portion of the shielded cable 10 is improved, and the folded drain wire 14 is fixed on the metal ring 20 attached to the peripheral surface of the insulating jacket 18 in a state of being attached. Will be retained.

Next, the shielded cable 10 that has been subjected to the terminal treatment in the above-described steps is assembled to a connector member.
FIG. 2 shows the configuration of the connector member. This connector member is connected to the exposed signal line 1 at the end of the shielded cable 10.
An inner conductor terminal 30 that is electrically connected to the inner housing 2, a dielectric housing 40 that accommodates the inner conductor terminal 30, and an outer conductor shell 50 that covers the outer periphery of the dielectric housing 40. Details of each component will be described below.

First, the inner conductor terminal 30 is provided with a terminal insertion opening 32 at a front portion for inserting and connecting a connection terminal of a mating connector. On the other hand, a pair of opposing press contact blades 34a, 34b are provided on both side walls of the rear portion of the inner conductor terminal 30.
Are provided by two sets, and the press-contact blades 34a, 34b
The terminal portion of the signal line 12 is pressed into contact with the inner conductor terminal 30 to make a conductive connection. Specifically, when the terminal portion of the signal line 12 is pressed against the press contact blades 34a, 34b, the insulating inner cover 12b of the signal line 12 is cut off by the press contact blades 34a, 34b, and the conductor 12a inside the insulating inner cover 12b is cut. Is the pressure contact blade 3
4a and 34b, and the signal line 12 and the inner conductor terminal 30 are electrically connected.

Further, a pair of opposing signal lines for holding the peripheral surface of the insulating inner cover 12b at the end of the connected signal line 12 are provided on both side wall surfaces further rearward of the press contact blades 34a and 34b. Barrels 36L and 36R are provided. Further, as shown in FIG. 4, when the inner conductor terminal 30 is accommodated in the terminal accommodating chambers 42 of the dielectric housing 40 as shown in FIG. Flexible locking pieces 38 are provided so that the inner conductor terminals 30 are locked at 42, 42.

Next, the structure of the dielectric housing 40 will be described. As shown in FIG. 2, the dielectric housing 40 has a terminal accommodating chamber 4 for accommodating the inner conductor terminal 30.
2 and 42 are provided, and the storage chambers 42 and 42 are separated from each other by a partition plate 44 provided at the center.
Also, insert the connection terminal of the mating connector into the front part,
Insertion openings 46, 4 for inserting and connecting to the terminal insertion openings 32 of the inner conductor terminals 30 accommodated in the terminal accommodating chambers 42, 42.
6 are provided. Also, the dielectric housing 40
Is provided with a flange 48 for restricting excessive insertion when it is inserted into the outer conductor shell 50.
Further, as shown in FIG. 4, a fitting recess 49 for engaging a cut-and-raised locking piece 56 provided on the bottom surface portion of the outer conductor shell 50 is provided on the back surface side of the dielectric housing 30.

Next, the configuration of the outer conductor shell 50 will be described. The outer conductor shell 50 is provided with an insertion opening 52 for inserting the dielectric housing 40 in the front, and an inverted drain wire of the shielded cable 10 which has been subjected to the above-described terminal treatment is provided in the rear. A pair of opposing conductor barrels 54L, 54R for clamping and fixing 14 with metal ring 20 as an underlay are provided. Also,
A dielectric housing 40 is provided on the bottom surface of the outer conductor shell 50.
A cut-and-raised locking piece 56 for locking the dielectric housing 40 inserted and engaged with the fitting recess 49 provided on the back surface side of the rear surface is formed toward the rear.

Hereinafter, a specific terminal processing step of the shielded cable 10 will be described. First, the inner conductor terminal 30
The terminal accommodating chamber 42 provided in the dielectric housing 40,
42, and the flexible locking pieces 38 provided on the upper surface of the inner conductor terminal 30 are locked in the terminal accommodating chambers 42, 42.
Next, the dielectric housing 40 is connected to the outer conductor shell 50.
Through the insertion port 52 provided in front of the. At this time,
Flange 48 provided on the front surface of dielectric housing 40
The dielectric housing 40 is inserted into the outer conductor shell 50 until it is locked. At the same time as being locked by the flange 48, the cut-and-raised locking piece 56 formed on the bottom surface of the outer conductor shell 50 is engaged with the fitting recess 49 provided on the back surface side of the dielectric housing 40. In this manner, the dielectric housing 40 is moved in both the pushing direction and the pulling direction by the engagement between the flange 48 of the dielectric housing 40 and the cut-and-raised engagement piece 56 on the bottom surface of the outer conductor shell 50. Is regulated, falling off from the outer conductor shell 50 is prevented.

As shown in FIGS. 3 and 4 (a), a metal ring 20 is attached to the peripheral surface of the insulating jacket 18 and caulked, and then the drain wire 14
Is folded back and applied to the metal ring 20, and the terminal of the shielded cable 10 formed by covering the resin mold M including the exposed base ends of the signal line 12 and the drain line 14 and the end of the insulating jacket 18. Connect the parts. The drain wire 14 is folded back on the metal ring below the shielded cable 10 so as to contact the bottom 58 of the conductor barrels 54L, 54R provided integrally with the outer conductor shell 50 to be connected.

The details of this terminal connection are described in detail below.
Of the terminal housings 42, 4 of the dielectric housing 40.
2 are pressed against the press contact blades 34a and 34b provided behind the inner conductor terminal 30 accommodated in the inner conductor terminal 2, respectively, to electrically conduct the conductor 12a of the signal line 12 and the inner conductor terminal 30, Signal line barrel 3 provided behind 30
The connection between the signal line 12 and the inner conductor terminal 30 is completed by holding the 6L and 36R on the peripheral surface of the insulating inner cover 12b.

Next, the conductor barrels 54L, 54R integrally provided behind the outer conductor shell 50 together with the metal ring 20 attached to the peripheral surface of the insulating jacket 18 of the shielded cable 10 and the terminal portion of the drain wire 14. Is held. Thus, as shown in the enlarged view of FIG. 4B, the drain line 14 is connected to the bottom 5 of the conductor barrels 54L and 54R.
8 and the metal ring 20, and the drain wire 14 is electrically connected to the outer conductor shell 50. The terminal connector of the shielded cable 10 assembled in this manner is covered with a housing cover (not shown) to finally form a connector.

The present invention is not limited to the above embodiment at all, and various modifications can be made without departing from the spirit of the present invention. For example, in the above embodiment, an open barrel type metal ring was used as the metal ring for caulking and fixing to the outer periphery of the shielded cable. They may be worn. Further, in the above embodiment, the terminal portion of the shielded cable is coated with a resin mold made of a hot melt material in order to increase the connection strength of the terminal portion of the shielded cable, but the terminal processing structure is not provided with the resin mold. Of course, it doesn't matter.

Further, in the above embodiment, the conductor barrel formed integrally with the outer conductor shell was used as the conductor barrel for clamping and fixing the drain wire folded on the metal ring.
As long as this conductor barrel is connected so as to be electrically connected to the outer conductor shell, it may be formed of a member separate from the outer conductor shell.

Furthermore, in the above embodiment, when the drain wire is folded back to the metal ring side, the drain wire is folded down below the shielded cable, and the drain wire is clamped between the metal ring and the bottom of the conductor barrel, thereby forming a drain wire. The outer conductor shell is conductively connected, but the return wire is not limited to the lower side of the cable, but is clamped between the metal ring and the conductor barrel, and the drain wire is securely connected to the outer conductor shell. If it is possible, it may be turned back in any direction.

Further, in the above embodiment, the connection between the inner conductor terminal and the signal line of the shield cable terminal portion is performed by pressing the insulating inner jacket of the signal line by a pressure contact blade provided behind the inner conductor terminal. Regardless of the method using the press contact blades, the method of connecting the terminals is, for example, a method of peeling off the insulator of the signal line and connecting the exposed conductor to the inner conductor terminal by welding or soldering. Of course, it doesn't matter.

[0034]

According to the terminal treatment structure of the shielded cable according to the first aspect of the present invention, there is provided a terminal treatment structure of a shielded cable having a drain wire, wherein a peripheral surface of an insulation jacket on a connection terminal side of the shielded cable is provided. Attach a metal ring to
Fold back the drain wire exposed on the terminal side of the cable,
The terminal portion of the folded drain wire is applied to the metal ring, and the terminal portion of the drain wire is clamped and held together with the metal ring by a conductor barrel provided in conduction with the outer conductor shell. , While the state of the conductive connection between the drain wire and the outer conductor shell is reliably maintained,
This is an effect unique to the present invention in that a terminal processing structure of a shielded cable having high connection reliability can be obtained.

Further, unlike the conventional terminal processing structure, a complicated connection process such as welding or soldering of the drain wire to the connection terminal dedicated to the drain wire is not required at all, and the drain wire can be electrically connected to the outer conductor shell very easily. Can be electrically connected. In addition, since it is not necessary to provide a terminal accommodating chamber for accommodating the terminal dedicated to the drain line on the dielectric side, it is possible to reduce the size of the dielectric and the connector as a whole.

Furthermore, according to the terminal processing structure of the present invention, usable shielded cables can be applied not only to the type having a drain wire but also to a cable composed of a braided wire instead of a drain wire. In this case, a metal ring is attached to the peripheral surface of the shielded cable, the insulating jacket at the end of the shielded cable is peeled off, and the exposed braided wire is folded onto the metal ring on which the exposed braided wire is attached. The terminal connection processing can be performed in the same procedure as a shielded cable having a drain wire by holding the underlay by a conductor barrel with the underlay as a base, which is an extremely useful terminal processing structure.

Further, in the terminal treatment structure of the shielded cable according to the second aspect, since the conductor barrel for clamping the terminal portion of the drain wire is provided integrally with the outer conductor shell, the conductor barrel is formed as a separate member. Work efficiency is higher than the structure provided, and the number of parts is reduced, so that workability and productivity in terminal processing of the shielded cable can be improved.

Further, in the terminal treatment structure for a shielded cable according to the third aspect, a resin mold is formed on the base end side of the signal line exposed on the terminal side of the shielded cable and the folded drain line by stripping the insulating jacket. As a result, the connection strength of the exposed signal line at the terminal connection portion of the shielded cable is improved, and the drain line folded over the metal sleeve is folded back by the covered resin mold. Since the drain wire is fixed and held, it is possible to prevent the drain wire from returning to its original state due to the resilience during the work of connecting the drain wire to the terminal, so that the work of connecting the drain wire to the terminal can be performed more smoothly.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a state in which a drain wire is turned to a cable side in a terminal processing structure of a shielded cable according to an embodiment of the present invention.

FIG. 2 is a sectional view of a terminal processing structure of the shielded cable shown in FIG.

FIG. 3 is an exploded perspective view showing a terminal processing step of assembling the shield cable to a connector member.

FIG. 4 is a sectional view showing a terminal processing step of assembling the shielded cable to the connector member.

FIG. 5 is an exploded perspective view showing a terminal processing structure of a shielded cable having a drain wire which is generally known in the related art.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Shielded cable 12 Signal wire 14 Drain wire 18 Insulation jacket 20 Metal ring 30 Inner conductor terminal 34a, 34b Pressure contact blade 40 Dielectric housing 50 Outer conductor shell 54L, 54R Conductor barrel

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Chihiro Yoshioka 1-7-10 Kikuzumi, Minami-ku, Nagoya City, Aichi Prefecture Inside the Auto Network Engineering Laboratory Co., Ltd. (72) Inventor Ryoji Tsuji Kikuzumi, Minami-ku, Nagoya City, Aichi Prefecture 1-7-10 F-term in Auto Network Engineering Laboratory Co., Ltd. (Reference) 5G355 AA10 BA04 BA08 BA20 5G375 AA12 CA03 CA13 CA19 CC07 DA36 DB16 DB37

Claims (3)

[Claims] 1. A terminal treatment structure for a shielded cable having a drain line in addition to a signal line, wherein a metal ring is attached to a peripheral surface of an insulation jacket on a terminal side of the shielded cable, and the insulation jacket is peeled. Then, the drain wire exposed on the terminal side of the shielded cable is folded back, the terminal portion of the folded drain wire is applied to the metal ring, and the terminal of the drain wire is provided in a conductor barrel provided in a conductive state with the outer conductor shell. A terminal treatment structure for a shielded cable, characterized in that a portion thereof is clamped and held with a metal ring. 2. The structure according to claim 1, wherein the conductor barrel is provided integrally with the outer conductor shell. 3. A resin mold is coated on the base end of the signal line and the folded drain line exposed on the terminal side of the shielded cable by peeling the insulating jacket and the terminal side of the insulating jacket. The terminal processing structure for a shielded cable according to claim 1 or 2, wherein: