JPH11219761A - Modular plug - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress dispersion of a performance preventing cross talk and improve the performance preventing cross talk in practically using condition. SOLUTION: This modular plug is provided with a block 12 for lining each core wire per twist pair wire with respect to the twist pair wire consisting of cores by a ratio of 4 to 8 in a cable C, and connecting each 8 core wire to a IDC terminal 11; a block 15 fixedly holding 8 pieces of contacts 13 and pins 14 connected to each contact, a printed board 15 electrically connecting the 8 pieces of the IDC terminal 11 to the 8 pins 14 respectively.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a modular plug particularly suitable for a cable used in a network or the like.

[0002]

2. Description of the Related Art Conventionally, a local area network (LAN) using Ethernet has been constructed.
4 to 8 of connection cables required for Ethernet
A so-called 10BASE-T type cable in which a core twisted pair wire (twisted wire) is covered with a sheath is widely used.
This cable has the advantages that it is relatively inexpensive and that the wiring is easy because of its small diameter. In addition, 10BASE
The -T type cable is generally used with standardized plug connectors (modular plugs) connected to both ends. For example, it is used by being connected to another cable via a predetermined connection member, or connected to a predetermined device via a standardized jack connector (modular jack) corresponding to the plug connector.

FIG. 10 is a view showing a cable used in a 10BASE-T type. This cable C has a core wire 1 covered with a white / orange insulating coating, a core wire 2 covered with an orange insulating coating, Core wire 3 covered with white / green insulating coating, core wire 4 covered with blue insulating coating, core wire 5 covered with white / blue insulating coating, core wire 6 covered with green insulating coating, white / green The core wire 7 covered with the brown insulating coating and the core wire 8 covered with the brown insulating coating are the core wires 1, 2, 3, 6, 4.
Four twisted pair wires twisted for each pair of 5 and core wires 7 and 8 are covered with an insulating sheath 9.

Hereafter, core wires 4, 5, core wires 3, 6, core wires 1, 2 and core wires 7, 8 are respectively referred to as a first pair, a second pair,
They are referred to as a third pair and a fourth pair. FIG. 11A is a plan view of the 10BASE-T type cable viewed from the contact side, and FIG.
FIG. 11A is a cross-sectional view of FIG. 11A viewed from above, and a method of connecting the cable C to the plug connector 90 will be described with reference to FIG.

[0005] First, the sheath 9 of the cable C is peeled off to expose each core wire while keeping the insulation coating, and each twisted pair wire is untwisted. Then, each core wire is aligned in parallel to the arrangement specified by the standard (FIG. 10). . Then, with this arrangement, it is pushed into a predetermined insertion opening of the plug connector 90 (FIG.
(A)) Each blade contact 91 inserted into the plug connector 90 is pressed against the corresponding core wire (FIG. 11 (b)). Thereby, the tip (upper tip) of each blade contact 91 penetrates the covering of the corresponding core wire and is electrically connected to the core wire.

As a result, the core wires 1 to 8 are electrically connected to the contacts 911 to 918 of the plug connector 90, respectively (FIG. 11A).

[0007]

However, the conventional plug connector 90 has a problem that the crosstalk performance varies. That is, when the respective core wires are connected to the plug connector 90, as shown in FIG. 10, the second pair (core wire 6) becomes the first pair (core wires 4, 5).
Are arranged in parallel so as to straddle on the way
-6836). As described above, the state in which the second pair straddles the first pair naturally varies in the process of connecting the cable C to the plug connector 90.
The cross talk at the site varies.

Here, the performance of the crosstalk is generally expressed by:
The evaluation is made not in the plug connector alone but in the actual use state in which the plug connector is fitted to the jack connector. For this reason, if the performance of the crosstalk of the plug connector varies, the performance of the crosstalk in the actual use condition also deteriorates due to the influence of the variation. In particular, if the amount of crosstalk of the plug connector is extremely small or large, the crosstalk performance in an actual use state will be extremely deteriorated.

Further, in recent years, the speed has been increasingly increased (for example, 100
In a LAN that is being changed to about MHz, the above-mentioned variation becomes an even more important problem. The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a modular plug capable of suppressing variation in crosstalk performance and improving crosstalk performance in an actual use state.

[0010]

SUMMARY OF THE INVENTION The modular plug of the present invention for solving the above-mentioned problems is characterized in that, for a plurality of pairs of stranded wires in which a plurality of core wires are twisted for each pair, the modular plug is provided for each of the stranded wires. A core wire alignment portion for aligning each core wire, a terminal for electrical connection with each of the core wires, a plurality of contacts whose arrangement for the plurality of core wires is standardized, and a wiring having a fixed wiring state Crosstalk adjusting means for wiring the plurality of terminals toward the plurality of contacts by using a member, and adjusting crosstalk between the pairs of the stranded wires, respectively.

In this configuration, since a plurality of pairs of stranded wires are aligned for each stranded wire at the core wire alignment section, each stranded wire has a core wire arrangement that does not straddle other stranded wires. As a result, the occurrence of crosstalk between pairs caused by one of the strands straddling the other strand is prevented. Further, since the wiring state between each terminal and the corresponding contact is fixed, variation in the performance of crosstalk caused by the fluctuation of the wiring state can be suppressed. Further, since the crosstalk between the pairs for a plurality of pairs of twisted wires is adjusted, the crosstalk performance in an actual use state is improved.

[0012] A flat cable may be provided between the crosstalk adjusting means and the plurality of contacts. In this configuration, for example, if a flat cable is interposed between the crosstalk adjusting means and the conventional modular plug, the above-described effect is added to the conventional modular plug. Further, the crosstalk adjusting means is a printed circuit board, and the wiring member in which the wiring state is fixed is a conductor pattern of the printed circuit board, and the adjustment of the crosstalk between the pair by the crosstalk adjusting means, It may be performed using at least one of the arrangement and the width of the conductor pattern. According to this configuration, the wiring state between each terminal and the corresponding contact can be suitably fixed to the printed circuit board.

Further, at least one adjusting member for adjusting crosstalk between any one of the plurality of pairs of stranded wires and another stranded wire may be provided. According to this configuration, by using the adjustment member,
The crosstalk performance in the actual use state can be further improved. In addition, the crosstalk can be adjusted not at the stage of designing the modular plug but after terminating the cable to the modular plug, and the crosstalk can be adjusted in an actual use state in combination with an unexpected jack connector. Performance can be improved.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG.
FIG. 1 is an exploded perspective view showing a first embodiment applied to a cable used in a T-type, and the first embodiment will be described below with reference to FIG. In FIG. 1, the same cable C as that of the related art is used, and a connector (modular plug) 10 is used.
Is a block 12 for fixing and holding eight IDC terminals 11 as terminals of the present invention, and eight contacts 13 (1
31-138) and the pins 14 connected to each of them.
Blocks 15 for holding (141 to 148) fixedly;
Printed circuit board (crosstalk adjusting means) 16 for electrically connecting each IDC terminal 11 to eight pins 14
And a body 17 and a lid 18 for storing or holding them. The connection side (right side in FIG. 1) of the body 17 is formed in the same manner as the plug shape of the conventional connector 90 shown in FIG. 11, and can be connected to a conventional jack connector (not shown).

FIG. 2A is a plan view of the connector 10 and the cable C as viewed from the contact side, and FIG. 2B is a cross-sectional view of FIG. 2A as viewed from above.
In detail, the block 12 is provided with a core line aligning section 121 for aligning each core line for each twisted pair line with respect to four twisted pair lines, and the IDC terminals 11 (111 to 118) are provided. Is provided.

The cable C is attached to the block 12 by stripping the sheath 9 of the cable C, exposing each core wire with the insulation coating, and untwisting each twisted pair wire and removing only the necessary amount at the termination. Uncoiling, as shown in FIG. 2A, the twisted pair wires are arranged in parallel in the order of a third pair, a second pair, a first pair, and a fourth pair from above, and the core wires 1 to 8
Are connected (terminated) to the IDC terminals 111 to 118, respectively. As a result, each core wire is aligned for each twisted pair wire and held by the block 12, and any twisted pair wire becomes a core wire array that does not straddle other twisted pair wires. FIG. 16 is a plan view when viewed from above, and FIG. 3B is a plan view when viewed from below. The printed circuit board 16 will be described in detail with reference to FIG.

The printed circuit board 16 is of a double-sided type having an upper surface serving as a soldering surface. On the lower side of the upper surface, as shown in FIG.
Is provided. The lands L11 and L16 are respectively connected to bypasses B11 and B16 on the lower surface and signal lines P1 and P1 on the upper surface.
It is connected to lands L21, L26 via P6 and bypasses B21, B26 on the lower surface. Land L12 ~
L15 and L17 are signal lines P2 to P5 and P7, respectively.
Are connected to the lands L22 to L25 and L27. Further, the land L18 is connected to the land L28 via the signal line P8 and the bypass B28.

The IDC terminals 111 to 118 (upper ends of the respective terminals 11 in FIG. 1) are connected to the lands L11 to L18 by soldering, respectively.
The pins 141 to 148 are respectively connected to L28 by soldering. That is, the block 12 for fixing and holding the eight IDC terminals 11 and the block 15 for fixing and holding the eight contacts 13 and the pins 14 connected to each of them are soldered to the printed circuit board 16 shown in FIG. You.

In the printed circuit board 16, the crosstalk between the twisted pair wires in the actual use state is adjusted by adjusting the arrangement of the conductor patterns, the conductor width, and the like. Returning to FIG. 1, on both side surfaces of the body 17, concave portions 171 for attaching the lid 18 are formed, and on both sides of the lid 18 corresponding thereto, claws 181a are respectively provided at the tips.
The projection 181 having the shape is provided upright. Therefore, each protrusion 1
The lower surface 171a of the recess 171 corresponding to the 81 claw 181a
The cover 18 can be attached to the body 17.

Next, the assembly of the above parts will be described. First, the sheath 9 of the cable C is peeled off to expose each core wire while keeping the insulation coating, and all twists of each twisted pair wire are untwisted and untwisted as necessary for termination, and as shown in FIG. Twisted pair wires are arranged in parallel in the order of a third pair, a second pair, a first pair, and a fourth pair from the top, and core wires 1 to 8 are connected to IDC terminals 111 to 118, respectively.

Next, while the blocks 12, 15 and the printed circuit board 16 integrated by soldering are housed in the body 17 and the lid 18, each of the projections 181 on the lid 18 is formed.
Is hooked on the lower surface 171a of the corresponding recess 171 of the body 17. Thereby, the lid 18 is attached to the body 1
7, the blocks 12, 15 and the printed circuit board 16 are stored or held in the body 17 and the lid 18. And the core wire 1 of the cable C
8 are electrically connected to the contacts 131 to 138 via the IDC terminals 111 to 118, the printed circuit board 16, and the pins 141 to 148, respectively, as shown in FIG.

As described above, according to the present embodiment, any twisted pair wire has a core arrangement that does not straddle another twisted pair wire. The occurrence of crosstalk can be prevented. In addition, when terminating the twisted pair wire to the IDC terminal, it is not necessary to untwist all the twisted pair wires, so that the work efficiency is improved. The work variation is stable without affecting the crosstalk.

Further, since the wiring state from the IDC terminals 111 to 118 to the contacts 131 to 138 is fixed by the printed circuit board 16, it is possible to suppress the variation in crosstalk performance caused by the fluctuation of the wiring state. . Furthermore, since the arrangement of the conductor pattern, the conductor width, and the like are adjusted, the crosstalk performance in an actual use state in combination with a specific jack connector can be improved.

In this embodiment, a printed board is used as the crosstalk adjusting means. However, the present invention is not limited to this, and a lead frame or the like may be used. The printed circuit board 16 is a double-sided type, but is not limited thereto, and may be a single-sided type. in this case,
Instead of the bypass using the pattern conductor, a bypass structure using a jumper wire may be used.

Further, the contacts 131 to 138 may be structured to be directly soldered to the printed circuit board 16 without passing through the pins 141 to 148. FIG.
FIG. 5 is a diagram showing a second embodiment applied to a cable used in the BASE-T type, and the second embodiment will be described below with reference to FIG. The connector 20 has a block 12, a block 15, a body 17, and a lid 18 as well as a variable capacitor (adjustment member) C1,
It has a printed circuit board 26 on which C2 is mounted.

Therefore, the description of the same parts as in the first embodiment is omitted, and a different printed circuit board 26 will be described with reference to FIG. 6, which is a wiring diagram of the connector 20 after the assembly is completed. The printed circuit board 26 is different from the printed circuit board 16 of the first embodiment in that the variable capacitor C1 is connected between the core wire 3 and the core wire 5 and the variable capacitor C2 is connected between the core wire 4 and the core wire 6. By adjusting the capacitances of the variable capacitors C1 and C2, the capacitance between the first pair and the second pair is changed, and the crosstalk in the actual use state is set to a suitable value.

As described above, according to the second embodiment, in addition to the effects of the first embodiment, by adjusting the capacitance of the variable capacitors C1 and C2, the crosstalk in the actual use state is set to a more suitable value. can do. In addition, the crosstalk can be adjusted not at the stage of designing the connector 20 but after terminating the cable C to the connector 20, and the crosstalk can be adjusted in an actual use state in combination with an unexpected jack connector. It is possible to improve performance.

FIG. 7 is a diagram showing a third embodiment in which the present invention is applied to a cable used in a 10BASE-T type.
Hereinafter, the third embodiment will be described with reference to FIG.
The connector 30 includes a block 12 for fixedly holding eight IDC terminals 11, eight pin terminals 33, a flat cable 39 connected to these pin terminals 33,
Printed circuit board (crosstalk adjusting means) for electrically connecting each IDC terminal 11 to each of eight pin terminals 33
36, a body 37 for storing or holding them, and a lid 1
8.

FIG. 8 is a diagram showing the connection between the flat cable 39 and each of the pin terminals 33. The eight core wires of the flat cable 39 are respectively connected to the pin terminals 331.
To 338. FIG. 9 shows the printed circuit board 36.
The printed circuit board 36 has IDC terminals 111 to 118 in the same manner as the printed circuit board 16 of the first embodiment.
Are provided with lands L11 to L18, respectively, while lands L21 to L28 are provided for pin terminals 331 to 338, respectively. Land L1
1 to L18 and lands L21 to L28 are also wired in the same manner as in the first embodiment. Further, similarly to the first embodiment, the printed circuit board 36 is a wiring in consideration of crosstalk in an actual use state.

The block 12 for fixing and holding the eight IDC terminals 11 and the eight pin terminals 33 connected to the flat cable 39 are soldered to a printed circuit board 36. Further, the body 37 is the same as the body 17 except that the connection side of the body 17 of the first embodiment is cut, and for example, a concave portion 171 for attaching the lid 18 is provided on each side. Is formed (Fig. 1
reference).

Next, the assembly of the above parts will be described. First, the sheath 9 of the cable C is peeled off to expose each core wire while keeping the insulation coating, and all the twists of each twisted pair wire are untwisted and untwisted as necessary for termination, and as shown in FIG. Each twisted pair wire is aligned in parallel in the order of 3 pairs, 2nd pair, 1st pair and 4th pair, and
8 are connected to the IDC terminals 111 to 118, respectively (see FIG. 2A).

Next, the block 12 and the printed circuit board 36, which are integrated by soldering, are put together with the body 37 and the lid 18.
The claw 1 of each projection 181 on the lid 18 is stored in the
81a corresponds to the lower surface 171 of the concave portion 171 of the corresponding body 37.
a. Next, the right end of the flat cable 39 is pushed into a predetermined insertion opening of the plug connector 90, and each blade contact 91 inserted into the plug connector 90 is connected to a corresponding core wire (see FIG. 7).

Thus, the core wires 1 to 8 of the cable C are
IDC terminals 111 to 118, printed circuit board 3 respectively
6. Pin terminals 331 to 338 and flat cable 39
Through the contacts 911 to 91 of the plug connector 90
8 will be electrically connected. As described above, according to the third embodiment, since any twisted pair wire has a core wire arrangement that does not straddle another twisted pair wire, the crossover between pairs caused by any twisted pair wire straddling another twisted pair wire is performed. The occurrence of talk can be prevented.

Further, when terminating the twisted pair wire to the IDC terminal, it is not necessary to untwist all the twisted pair wires, so that the work efficiency is improved, and only a small amount of twist required for termination is required. Therefore, this work variation is stable without affecting crosstalk. IDC
Contacts 911-9 from terminals 111-118, respectively
The printed circuit board 36, the pin terminals 33
Since the flat cable 39 is fixed by the flat cable 39 unless it is unnecessarily twisted or bent, it is possible to suppress a variation in crosstalk performance caused by a change in a wiring state.

Further, since the arrangement of the conductor patterns, the conductor width, and the like are adjusted, the crosstalk performance in a practical use state in combination with a specific jack connector can be improved.

[0036]

As is apparent from the above description, according to the first aspect of the present invention, it is possible to suppress the variation in the crosstalk performance, and for example, the actual use state in combination with a specific jack connector It is possible to improve the performance of the crosstalk in the communication.

According to the second aspect of the present invention, for example, the effect of the first aspect of the present invention can be added to a conventional modular plug. According to the invention described in claim 3,
It is possible to suitably fix the wiring state between each terminal and the corresponding contact. According to the fourth aspect of the invention, it is possible to further improve the performance of crosstalk in an actual use state. In addition, the crosstalk can be adjusted not at the stage of designing the modular plug but after terminating the cable to the modular plug, and the crosstalk can be adjusted in an actual use state in combination with an unexpected jack connector. Can be improved in performance.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing a first embodiment in which the present invention is applied to a cable used in a 10BASE-T type.

FIG. 2A is a plan view of a connector and a cable as viewed from a contact side, and FIG. 2B is a cross-sectional view of FIG.

3A is a plan view of the printed circuit board in FIG. 1 as viewed from above, and FIG. 3B is a plan view as viewed from below.

FIG. 4 is a wiring diagram of a connector after assembly is completed.

FIG. 5 is a diagram showing a second embodiment in which the present invention is applied to a cable used in a 10BASE-T type.

FIG. 6 is a wiring diagram of the connector after assembly is completed.

FIG. 7 is a diagram showing a third embodiment in which the present invention is applied to a cable used in a 10BASE-T type.

FIG. 8 is a diagram showing a state of connection between a flat cable and each pin terminal.

FIG. 9 is a top view of the printed circuit board.

FIG. 10 is a diagram showing a cable used in a 10BASE-T type.

FIG. 11 (a) is 10 BASE viewed from the contact side.
FIG. 2B is a plan view of the T-type cable, and FIG. 2B is a cross-sectional view of FIG.

[Explanation of symbols]

 10, 20, 30 Connector 11 (111-118) IDC terminal 12 Block 13 (131-138) Contact 14 (141-148) Pin 15 Block 16, 26, 36 Printed circuit board 17, 37 Body 18 Lid 33 Pin terminal 39 Flat Cable 121 Core line alignment part C Cable C1, C2 Variable capacitor

Claims (4)

[Claims] 1. A core wire alignment section for aligning each core wire with respect to each of a plurality of pairs of twisted wires in which a plurality of core wires are twisted in pairs, and an electrical connection between each core wire and each core wire. Terminals for electrical connection, a plurality of contacts whose arrangements with respect to the plurality of core wires are standardized, and a plurality of terminals each facing the plurality of contacts using a wiring member having a fixed wiring state. A modular plug, comprising: a crosstalk adjusting means for wiring and adjusting crosstalk between pairs of the stranded wires. 2. The modular plug according to claim 1, further comprising a flat cable interposed between said crosstalk adjusting means and said plurality of contacts. 3. The crosstalk adjusting means is a printed circuit board, and the wiring member whose wiring state is fixed is a conductor pattern of the printed circuit board, and the crosstalk between the pair is determined by the crosstalk adjusting means. The modular plug according to claim 1, wherein the adjustment is performed using at least one of an arrangement and a width of the conductor pattern. 4. The apparatus according to claim 1, further comprising at least one adjusting member for adjusting crosstalk between one of the plurality of twisted wires and another of the twisted wires. Item 4. The modular plug according to any one of Items 1 to 3.