JP2002017019A - Connection structure for multi-conductor shielded cable containing drain wire - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a multi-conductor shielded cable connecting structure which makes it possible to connect a multi-conductor shielded cable containing a drain wire to a pressure-welding connector collectively efficiently by pressure welding with its core pitch stabilized, and also increase the reliability of the connection work. SOLUTION: The base end sides of the connecting ends of signal wires 12R, 12L exposed by removing the sheath 18 of the multi-conductor shielded cable 10 containing a drain wire, and the whole peripheral part of the connecting end of the drain wire 14 whose conductor is exposed are covered with a core pitch holding member 20 made from synthetic resin, and the tip side of the connecting end of each signal wire 12R, 12L and the tip side of the connecting end of the drain wire are pressure-welded and connected to each connecting terminal of the internal conductor terminal member 34 of the pressure-welding connector 30. Consequently, the pitches among individual cores of the signal wires 12R, 12L and the drain wire 14 are held stably, and high reliability of pressure welding work, etc., are obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure for connecting a multi-core shielded cable to a press-connecting connector, and more particularly, to a multi-core shielded cable including a plurality of signal wires and a drain wire for grounding. The present invention relates to a connection structure of a multi-core shielded cable in which a connection terminal is pressure-connected to a pressure-connection terminal of a pressure-connection connector to the pressure-connection connector.

[0002]

2. Description of the Related Art As a structure for connecting a multi-core cable of this kind to a connector, for example, as shown in FIG. 8, a plurality of signal lines (two in this example) 82R and 82L and one signal line are provided. A connection terminal of a shielded cable 80 having a ground drain wire 84 and a connection terminal of a connector 90 is disclosed in Japanese Patent Application No. 11-3188 by the present applicant.
No. 65 has already proposed this.

In this structure, the cable jacket 86 on the connection terminal side of the cable 80 is peeled off and a waterproof plug 88 is attached. On the connector 90 side, cable terminals 94a,
An inner conductor terminal member 94 having a drain terminal 94b and a drain terminal 94b is attached to a metal shell frame 92 in a state where the inner conductor terminal member 94 is fixed to a terminal holding cap 96 having an insertion hole for a connection terminal (a male terminal in this case) of a mating connector. In this state, the signal lines 82R, 82L and the drain line 84 are connected to the respective cable terminals 94a, 94c and the drain terminal 94b of the inner conductor terminal member 94 mounted on the metal shell frame 92 by welding or the like. An insulation barrel 93 provided on the metal shell frame 92 sandwiches a narrow portion of the waterproof plug 88 of the shielded cable 80 so that the shielded cable cannot be accidentally pulled out of the connector.

According to such a conventionally known connection structure, assembling (assembling) of the connector itself is relatively easy, and connection of the signal line and the drain line to the connector is relatively simple and efficient. There is the advantage that it can be done.

[0005]

However, in the case of a multi-core wire, when assembling a signal wire or a drain wire to each connection terminal in the connector, it is difficult to make the pitch between the core wires uniform (forming), and furthermore, a stranded wire. In the case of, it is more difficult because it can be disintegrated. For this reason, it is difficult to insert multi-core wires (signal wires and drain wires) in the metal shell of the connector with good directivity and to accurately connect them to the connection positions of the cable terminals and drain terminals of the inner conductor terminal members. It may be redone.

[0006] Further, since the directionality of the core wire is poor and the stranded wire may sometimes come apart, stripping of the cable jacket and connection to the connector terminals must be processed individually one by one. And the workability was poor.

Further, as a connection structure of this kind, there is already a technique of inserting a core wire between a pair of cutting edges and cutting the insulating coating material of the core wire to make an electrical pressure contact connection. It is not suitable for connection, and there is also a problem that the workability of connection is poor because different types of connections are mixed such that the terminals of signal lines are connected by pressure welding and the terminals of drain lines are connected by welding.

The problem to be solved by the present invention is that a connection terminal of each core wire of a multi-core shielded cable including a drain wire is connected to a multi-core wire shielded cable and a connector terminal with a pitch interval between the core wires being adjusted. The object of the present invention is to improve the reliability of connection work by pressure welding and to improve work efficiency.

[0009]

According to the present invention, there is provided a cable jacket for a multi-core shielded cable including a drain wire in addition to a plurality of signal wires. The exposed conductor portion of the drain line exposed by peeling off is molded with a synthetic resin, and the resin molded portion of the drain line and the terminal portion of each signal line are crimp-connected to the crimp connection terminals provided on the crimp connector. It is an abstract.

According to the connection structure having the above structure, the connection terminal of the drain line is covered with the resin mold, so that the pressure connection can be performed, and both the signal line and the drain line are connected by the pressure connection. Work will be performed smoothly.

Further, the base end side of the connection end of each signal line exposed by peeling the cable jacket of the shielded cable and the base end side of the conductor exposed end portion of the drain line are combined. If the resin mold is attached to the conductor exposed terminal portion of the drain wire protruding from the core wire pitch holding member, the core wire is held between the core wires by the core wire pitch holding member. Since the pitch is maintained at a constant interval and is connected by pressure to the press-connecting connection terminal of the press-connecting connector in that state, the accuracy of the connection position is maintained and the connection operation is performed more smoothly.

In this case, if the resin mold of the connection end portion of the drain wire is integrally formed with the core wire pitch holding member, the number of parts is reduced and the number of assembling steps is reduced. In other words, if the core wire pitch holding member is integrally formed with the waterproof sealing member attached to the cable connection terminal side as described in claim 4, the waterproofness (sealing property) of the shielded cable is provided.
In addition, the number of parts and the number of assembling steps can be reduced.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below in detail with reference to the drawings. FIG. 1 shows a schematic configuration of a connection terminal portion of a shielded cable applied to a connection structure of a multi-core wire type cable according to an embodiment of the present invention. In this multi-core shielded cable 10, two signal lines 12R and 12L and one drain line 14 for grounding are arranged in parallel on the same plane.
4 is disposed between the two signal lines 12R and 12L.

As is well known, both signal lines 12R, 1R,
2L is covered with a synthetic resin insulator 16b around the conductor 16a, while the drain line 14 is a bare conductor, and the signal line 12R, 12L and the drain line 14
Although not shown, it is vertically wrapped or spirally wound with a shielding tape laminated with a metal foil such as copper or aluminum with excellent electrical conductivity and an insulating film such as a polyester film, or covered with a braid, and the outer periphery is further synthesized. Cable sheath (sheath part) 18 made of resin
Coated with The conductor 16a and the drain line 14 of the signal lines 12R and 12L are each formed of a stranded wire made of a conductive element such as copper or aluminum having excellent electrical conductivity.

The cable sheath (sheath portion) 18 at the connection terminal portion of the shielded cable 10 is peeled off, and both the signal lines 12R and 12L in a state where the conductor 16a is covered with the insulator 16b are bare. In a state where the conductor drain line 14 is exposed, the base end side of the exposed portion of the sheath excluding the distal end portions of the signal lines 12R and 12L and the entire periphery of the exposed conductor portion of the drain line 14 are formed. A core wire pitch holding member 20 made of a synthetic resin material is mounted so as to cover the core wire pitch holding member 20.

The core wire pitch holding member 20 is formed by a molding method using a synthetic resin (for example, a thermoplastic polyamide resin) which can be formed at a low temperature and a low pressure. A mold body portion 22a that integrally covers the base end side of the exposed portion and the base end side of the conductor exposed portion of the drain wire 14, and a drain wire coating that covers the tip end side of the conductor exposed portion of the drain wire 14 in a cylindrical shape. The portion 22b is formed by integral molding of resin.

As this kind of thermoplastic resin, signal line 1
A material having high adhesiveness to the 2R, 12L and drain wires 14 and having a hardness of 50 to 60 (equivalent to a material usually used for a waterproof plug) is desirable. Examples of the material include polyamide hot melt and liquid silicone (silicone RTV and liquid silicone for rim molding). Such a resin material has high adhesiveness, so it has excellent sealing properties on the cable end side, and the pitch interval between each core wire is also fixed, so it is easy to determine the direction when inserting it into the press-fit connector, and it is unique to resin. Because of its flexibility and elasticity, there is a degree of freedom in shape, and there is a surface that is easy to handle during connection work.

FIG. 2 shows the shielded cable 10 in cross section. In this shielded cable 10,
As before, the cable jacket (sheath portion) 18 on the connection terminal side
A waterproof plug 24 is attached around the periphery. This waterproof plug 24
Has high adhesion to the cable jacket (sheath portion) 18,
A material having a hardness of 50 to 60 is desirable, and a normal rubber stopper is used here.

After the waterproof plug 24 is attached to the connection end of the cable, the core pitch holding member 20 made of the synthetic resin is attached to the connection end of the cable by a molding method. A state in which the pitch interval of each core wire is maintained constant is obtained, and since the connection terminal of the drain line 14 is also covered with the resin mold, the distance between the adjacent signal lines 12R and 12L is maintained constant. Leaning to the side is avoided.

FIG. 3 is an exploded perspective view showing a state where the connection terminal portion of the shielded cable is connected to the press-connecting connector. The press-connecting connector 30 includes a square frame-shaped shell frame 32 made of a metal plate having front and rear ends opened, an inner conductor terminal member 34 for connecting a shielded cable, and a terminal holding cap 36 to which the inner conductor terminal member 34 is attached. It is composed of

At one end of the shell frame 32, a cable jacket (sheath portion) of a connection terminal of the shielded cable 10 is provided.
The neck (constriction) 26 of the waterproofing plug 24 attached to 18
Is integrally provided with a bifurcated insulation barrel 38 which nips and is inseparable. Also, the inner conductor terminal member 3
4, both signal lines 12R, 12R of the shielded cable 10
Cable terminals 40R, 40L for connecting L connection terminals
And a drain terminal 42 for connecting a connection terminal of the drain line 14 having a bare conductor covered with a resin mold.

Each of the cable terminals 40R and 40L and the drain terminal 42 of the inner conductor terminal member 34 is
As shown in enlarged detail in FIG. 2, a pair of blades face each other, and the signal lines 12R, 12L or the drain lines 14 are inserted between the two blades.
b are provided at two locations in the core wire direction of the cable inserted into the connector terminal.

Returning to FIG. 3, the terminal holding cap 36 is attached to one end surface of a rectangular fitting frame 46a fitted in the shell frame 32, A flange-like lid 46b is provided as an integral member, and an insertion hole 48 into which a male connection terminal of a mating connector (not shown) is inserted.
a, 48b, and 48c are provided. The shell frame 32 is formed with a leaf spring-shaped fitting piece 52 that is resiliently fitted into the through hole 50 of the fitting frame 46a of the terminal holding cap 36, and is brought into contact with the drain terminal. It is configured to provide an electrical shield for the connector section.

FIG. 5 shows a state where the connection terminal of the shielded cable 10 is connected to the press-connecting connector 30. A waterproof plug 24 is attached to the shielded cable 10,
Further, the signal wires 12R and 12L and the drain wire 14 are connected to the press-fit connector 3 with the core wire pitch holding member 20 mounted.
As shown in the figure, the cable is inserted into the press contact blades 44a, 44b provided on the cable terminals 40R, 40L and the drain terminal 42 corresponding to the 0 inner conductor terminal members 34, respectively, in the direction of the arrow.

As a result, the insulator 16b covering the conductors 16a of the signal lines 12R and 12L and the covering portion 22b covering the terminal end of the drain wire 14 of the core wire pitch holding member 20 are provided in the cable line direction. Two sets of press contact blades 44
a, 44b, the signal lines 12R, 12L
Conductor 16a and the drain wire 14
4a and 44b are electrically connected.

The insulation cable 38 of the shell frame 32 clamps the constricted portion 26 of the waterproof plug 24 so that the shielded cable 10 is pulled out to the press-connecting connector 30 so that the connection with the press-connecting blade is not released even if the shield cable 10 is pulled. It is fixed so that it cannot be removed.

FIGS. 6 and 7 are sectional views showing a state in which the shielded cable 10 is connected to the press-connecting connector 30. FIG. As shown in the figure, a shielded cable is inserted from above into the front and rear press contact blades 44a, 44b of the cable terminals 40R, 40L and the drain terminal 42 provided on the inner conductor terminal member 34 of the press contact connector 30, and the signal lines 12R, 12L The insulator 16b is cut around the conductor 16a by the press-contact blades 44a, 44b of the cable terminals 40R, 40L so as to be electrically connected.

Also, with respect to the drain wire 14, the covering portion 22 b for covering the tip portion of the drain wire connection terminal of the core wire pitch holding member 20 is provided with the press contact blade 44 a of the drain terminal 42,
By being cut by 44b, they are also electrically connected.

At this time, the connection terminals of the shielded cable 10 on the side of the press-connecting connector include the signal lines 12R, 12L and the drain line 14 covered by the core pitch holding member 20, as shown relatively clearly in FIG. Since the state of being arranged in parallel at the pitch is maintained, the press-connecting state can be reliably obtained without displacement between the core wires.

In the connection operation, the conductor of the signal line is covered with an insulator so that the distal end of the signal line is not separated, and the peripheral end of the connection end of the drain line is also covered with the core wire pitch holding member 20. Since the connection is performed, there is no possibility that the connection will be separated, and the press-connecting operation will be performed smoothly. In addition, since the connection terminal of the drain line is also covered with the resin material, the fear of disconnection and short-circuit (short-circuit) can be solved.

The present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the spirit of the present invention. For example, in the above embodiment, the shielded cable is composed of a pair (two) of signal lines and one drain line, but can be applied to a multi-core shielded cable having three or more signal lines. However, the present invention is not limited to the flat type shielded cable of the above embodiment, but can be used for shielded cables of various wiring forms.

Further, in the above-mentioned embodiment, the core wire pitch holding member is not necessarily limited to the shape of the above-described embodiment, but may be changed according to the arrangement of the drain line and the signal line in the cable or the use and environment of the cable. The shape of the covering portion can be changed, and if the signal line and the drain line can be collectively connected to the press-connecting terminal of the connector by press-connecting, it is in accordance with the gist of the present invention. Furthermore, if the cable waterproof plug is integrally formed of the same material as the core wire pitch holding member, the number of parts and the number of assembling steps are reduced, so that the connection work of the connector cable becomes more efficient and contributes to cost reduction. Will be.

[0033]

According to the connection structure of the multi-core shielded cable to the press-connecting connector according to the first aspect of the present invention, the conductor exposed portion of the drain wire exposed by peeling the cable jacket is covered with the resin mold. Makes it possible to press-connect to the connector terminal and to perform press-connect to the connector terminal in exactly the same way as other signal lines without dispersing the conductor wires. And the connection work is highly reliable.

The workability can be further improved by maintaining each core pitch at a constant interval by the core pitch holding member as described in claim 2, or the drain can be formed as described in claim 3. If the connection end portion of the wire is integrally formed with the core pitch holding member, the number of parts and the number of assembling steps can be reduced, and the core pitch holding member can be attached to the connection terminal of the cable as described in claim 4. When integrally formed with the sealing member for use, not only the waterproof function is enhanced, but also the productivity is improved by reducing the number of parts and the number of assembling steps. Therefore, if these are applied to industrial production, a significant reduction in processing time and cost in the terminal connection process can be expected, and its usefulness is extremely large.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of a connection terminal portion as one embodiment of a multi-core cable applied to the present invention.

FIG. 2 is a plan cross-sectional view of the multi-core shielded cable shown in FIG. 1;

FIG. 3 is an exploded perspective view showing a state where a connection terminal portion of the multi-core type shielded cable is connected to a press-connecting connector.

FIG. 4 is a perspective view showing a state in which this multi-core wire type shielded cable is press-connected to a connection terminal provided on an inner conductor terminal member of the press-connecting connector.

FIG. 5 is an enlarged perspective view showing a state in which the shielded cable 10 covered with the pitch holding member 20 is connected to a connection terminal of an inner conductor terminal member.

FIG. 6 is a cross-sectional view showing a state where the shielded cable is connected to a press-connecting connector.

FIG. 7 is a cross-sectional view showing a state where the shielded cable is connected to a press-connecting connector.

FIG. 8 is an exploded perspective view showing a connection structure between a conventionally known shielded cable and a connector member.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Multi-core shielded cable 12R, 12L Signal line 14 Drain wire 16a Conductor 16b Insulator 18 Cable sheath (sheath part) 20 Core wire pitch holding member 22a Mold body part 22b Drain wire coating part 24 Waterproof plug 30 Pressure contact connector 32 Shell Frame 34 Inner conductor terminal member 36 Terminal holding cap 38 Insulation barrel 40R, 40L Cable terminal 42 Drain terminal 44a, 44b Pressure contact blade

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification code FI Theme coat ゛ (Reference) H05K 9/00 H01R 9/09 Z 5G375 (72) Inventor Chikahiro Yoshioka 1-chome Kikuzumi, Minami-ku, Nagoya-shi, Aichi Prefecture No. 7-10 F-term in Harness Research Institute, Inc. (reference) 5G355 AA03 BA11 CA04 CA23 5G375 AA05 CA19 DB16

Claims (4)

[Claims] 1. A conductor exposed terminal portion of a drain wire exposed by peeling a cable jacket of a multi-core shielded cable including a drain wire in addition to a plurality of signal wires is molded with a synthetic resin. A connection structure of a multi-core shielded cable to a press-connecting connector, wherein a molded portion and a terminal portion of each signal line are press-connected to press-connecting terminals provided on the press-connecting connector. 2. A base end side of a connection end of each signal line, which is exposed by peeling a cable jacket of the shielded cable, and a base end side of a conductor exposed end portion of a drain line by a core pitch holding member made of synthetic resin. 2. The pressure-welded multi-core wire shielded cable according to claim 1, wherein the resin mold is attached to a conductor exposed terminal portion of the drain wire, which is covered with the core wire and protrudes from the core wire pitch holding member. 3. Connection structure to connector. 3. The resin mold portion of the drain line,
The connection structure of a multi-core shielded cable to a press-connecting connector according to claim 2, wherein the multi-core shielded cable is formed integrally with the core pitch holding member. 4. The multi-core wire according to claim 2, wherein the core wire pitch holding member is formed integrally with a waterproof seal member mounted on a connection terminal side of the cable. Connection structure of type shielded cable to insulation displacement connector.