JPH10134903A - Modular plug - Google Patents

Abstract

PROBLEM TO BE SOLVED: To lower the cross talk between twist-pairs by aligning plural twist- pairs for holding per each twist-pair with a guide rail, and to effectively lower the cross talk by forming a guide plate of metal. SOLUTION: Plural number of cores 210 inside a cable 200 are bound, and coated with a sheath 201 and a shield wire 203. The core 210 is formed of twist-pairs 210A, which are respectively formed of two twisted cores 210, and these twist-pairs 210A are held inside the cable 200 in the stranded condition. A guide plate 140 for separating the cores 210, which are bound by the cable 200, per each twist-pair 210A so as to align them for holding is formed of metal. The core 210 is fixed to a housing 110, and connected to a grounding side contact terminal 120.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a modular plug, and more particularly, to a modular plug for electrically connecting a plurality of twisted pairs formed as a set of two core wires into an opening of a modular jack. About.

[0002]

2. Description of the Related Art Modular plugs and modular jacks are known as connector members used for telephones and LANs (local area networks). The modular plug is a member for connecting a plurality of cores such as cables and connecting them to the device main body, while the modular jack is provided on the device main body and connected to the modular plug. It is. These members are used in pairs. Generally, a modular plug is provided with a guide member for aligning a plurality of core wires in a cable. As a conventional example of the guide member, for example,
There is one disclosed in JP-A-8-7937. Here, a guide member made of plastic is used, and a type in which a plurality of core wires in a cable are arranged horizontally and at equal intervals is adopted. Note that, in particular,
A twisted cable, that is, a cable having a plurality of twisted core wires (a so-called twisted pair) as two sets is used. The twisted cable is particularly used to prevent the occurrence of noise due to the current induced by electromagnetic induction due to the action of an alternating magnetic field on the electric wire.

[0003] Contact terminals (hereinafter, referred to as "connection-side contact terminals") are attached to the respective core wires aligned by the guide members. These connection side contact terminals are members that are electrically connected to the respective core wires, receive electric signals from the corresponding core wires, and transmit the signals to the modular jack. The form of the connection side contact terminal is described in
-7937, a substantially rectangular shape, and a blade-like shape as disclosed in Japanese Patent Application Laid-Open No. 8-621756. In each case, the terminals are arranged in parallel so that the intervals between the adjacent terminals are all uniform, and the areas of the adjacent terminals overlap almost entirely.
A plurality of contact terminals (hereinafter, referred to as "receiving contact terminals") are also provided on the modular jack side in correspondence with the connection side contact terminals on the modular plug side. When the modular plug is attached to the modular jack, the connection side contact terminal and the reception side contact terminal can be connected correspondingly. The receiving contact terminal is also similar to the connection contact terminal.
In the related art, the terminals are arranged in parallel so that the intervals between the adjacent terminals are all uniform, and the adjacent terminals overlap almost entirely.

[0004]

On the other hand, a voltage or current flowing in a line or a terminal is induced to another line by electromagnetic coupling or electrostatic coupling, and crosstalk (crosstalk) occurs. When this crosstalk occurs, signal transmission between these lines and terminals is disturbed, and as a result, various obstacles such as noise occur. For this reason, this crosstalk must be reduced even in a modular plug. When a type in which all the core wires are arranged horizontally and at equal intervals as in the conventional example described above is adopted, the twisted pair is easily affected by electromagnetic coupling, and it is difficult to obtain a shielding effect. result, a possibility that crosstalk occurs between twisted pairs is generated.

[0005] A similar problem may occur when the guide member is formed of plastic. Further, if the connection-side contact terminals are arranged such that adjacent terminals overlap substantially over the entire surface as in the related art, there is a possibility that crosstalk may occur between these terminals. The present invention has been made in order to solve the above-mentioned problems of the prior art,
It is an object of the present invention to provide a modular plug capable of reducing crosstalk when using a twisted pair. Another object of the present invention is to provide a modular plug in which the material of the guide member is improved to solve the conventional problem.

Another object of the present invention is to provide a modular plug capable of reducing crosstalk generated between connection-side contact terminals.

[0007]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides an electric connector by inserting a plurality of twisted pairs formed as a pair of twisted pairs into a modular jack opening. In a modular plug that is connected in series, a plurality of twisted pairs are separated and aligned for each twisted pair, and a twisted pair separated and aligned by the guide plate is positioned and fixed for each core forming each twisted pair. And a contact terminal connected to each core wire fixed in position by the housing.
In the present invention, the guide plate is preferably made of metal. In the present invention, it is preferable that the housing is fixed such that the core wires adjacent to each other in the lateral direction are shifted from each other in the height direction.

Further, the present invention provides a modular plug for inserting a plurality of connected core wires into an opening of a modular jack and electrically connecting the core plug to a guide plate for separating and aligning the plurality of core wires. A housing for positioning and fixing the core wires separated and aligned by the guide plate, and contact terminals connected to the respective core wires positioned and fixed by the housing.
It is characterized in that the area portions are arranged so as not to substantially overlap the area portions of the adjacent contact terminals. In the present invention, it is preferable that the contact terminals are arranged such that the area thereof overlaps only with a part of the area of the adjacent contact terminal. In the present invention, the contact terminals are preferably arranged so that the area portions of the adjacent contact terminals are shifted in the longitudinal direction of each core wire.

In the present invention, the contact terminals are preferably arranged such that the area portions of the contact terminals adjacent to each other in the lateral direction are shifted in the height direction.

[0010]

Embodiments of the present invention will be described below with reference to the accompanying drawings. First, a modular plug according to an embodiment of the present invention will be described. FIG. 1 shows an exploded perspective view of an exploded part of a modular plug 100 of the present invention. Modular plug 100 includes housing 110
, An alignment member 130, a guide plate 140, a plurality of connection side contact terminals 120 (120A, 120B), and an insulating case 300. The housing 110 further includes a shield plate 114 formed in a substantially rectangular casing, and an insulating section 116 provided at a leading end of the casing so as to close one end of the casing. The insulating portion 116 is made of plastic, the shield plate 11
Reference numeral 4 denotes a metal, each of which is formed.

Generally, the alignment member 130 and the guide plate 140 are connected to the plurality of cores 2 in the cable 200.
10 is a member for separating and aligning the housing 10
10 is a core wire 2 separated and aligned by these members.
The connection side contact terminal 120 is a member connected to each core wire fixed in position by the housing. Hereinafter, the main members of the present invention will be described in more detail. Each core wire 210 in the cable 200 is covered with an insulating member, and these core wires 210 are covered with a sheath 201 and a shield wire 203 by grouping a plurality of wires. The core wire 210 is a twisted pair 210A in which two wires are twisted as one set, and here, four such twisted pairs 210A are provided. In the cable 200, these twisted pairs 2
10A is held in an intertwined state.

The guide plate 140 is connected to the cable 200.
This is a member for separating, aligning and holding the core wires 210 grouped together by the twisted pair 210A. The guide plate 140 is made of metal. The guide plate 140 has four through holes 143.
The through holes 143 are arranged such that the through holes 143 adjacent to each other in the lateral direction are alternately shifted in the height direction. One of the twisted pairs 210A is passed through each through hole 143. In this manner, the bundled core wires are connected to the metal guide plate 14 in particular.
By using 0 and separating each twisted pair 210A, each twisted pair can have a shielding effect, and as a result, crosstalk between twisted pairs can be reduced. Note that the alignment member 130 may also be made of metal, and as a result, it is possible to further reduce crosstalk between twisted pairs.

On both side portions of the guide plate 140, projecting portions 14 serving as stoppers inside the housing 110 are provided.
1 is also provided. These projections 141 not only serve as stoppers, but also serve to improve the shielding and shielding properties of the housing. That is, after the guide plate 140 is completely inserted into the housing 110 and the bent portion 117 connected to the shield plate 114 forming the housing 110 is bent inward, the protrusion 141 is covered by the bent portion 117. As a result, the shielding and shielding properties of the housing are improved. The alignment member 130 is a member for further separating, aligning, and holding each twisted pair separated by the guide plate 140 for each core wire. By providing this alignment member, the housing, in particular its insulation 1
There is an advantage that the operation for positioning in the insertion hole provided in the housing 16 can be facilitated, and the same function as the insertion hole of the housing described later can be exhibited. The alignment member 130 has the same number as the core wires 210, that is, 8 (= 4 ×
2) Two through holes 131 are provided. These through holes 131 are arranged such that through holes adjacent to each other in the lateral direction are alternately shifted in the height direction.

The housing 110 includes the guide plate 14
0 and has the function of receiving the alignment member 130 therein and fixing them, and holding the tip of each core wire 210 separated by the alignment member 130 therein.
It has the function of positioning and fixing. The former function is mainly achieved by the shield plate 114 of the housing, and the latter function is mainly achieved by the insulating portion 116 of the housing. Insulating part 11 provided at the tip of the housing
6 has eight insertion holes (not shown) corresponding to the positions of the through holes 131 of the alignment member. However, these insertion holes are not in a penetrated state. FIG. 2 shows a front view of the housing. In the figure, each core 210 disposed in the insertion hole is indicated by a broken line, and each core is assigned a number 210a to 210h. 210a and 210b, 210d and 210
e, 210g and 210h, and 210c and 210f
The twisted pairs are respectively formed by the cords of. This arrangement of the core wires is effective for reducing crosstalk due to electromagnetic coupling and electrostatic coupling generated from each core wire.

This arrangement is based on the following principle. That is, when currents of opposite phases are flowing through two cores, magnetic lines of force generated by these cores cancel each other at a position almost equidistant from the respective cores, and such a position In this case, the influence of the magnetic field lines does not occur. " This principle is well known to those skilled in the art. Specifically, with reference to FIG. 2, the magnetic field lines generated by the cores of 210a and 210b reduce the influence on the other paired cores, and the magnetic field lines generated by the cores of 210d and 210e are Reduce the effect on other paired cores,
Further, the lines of magnetic force generated by the cores of 210g and 210h reduce the effect on other paired cores, and
The lines of magnetic force produced by the cores of 210c and 210f are spaced apart from each other, thereby reducing the effect on other paired cores. As a result, it is possible to reduce crosstalk as a whole.

The housing 110 further has a function of locking and fixing the modular plug 100 to a modular jack 500 (see FIG. 5). For this reason, a lock portion 115 is provided at the distal end of the housing 110. The lock portion 115 is formed integrally with the housing distal end portion, particularly, the insulating portion 116, and is provided so as to extend obliquely upward (downward in FIG. 1) from the insulating portion 116 toward the rear. The lock section 115 is an insulating section 116
It is made of plastic similarly to the above, and can be elastically displaced downward. The function of the lock unit will be described later in detail. Each core 210a-2 fixed to the housing 110
The connection side contact terminal 120 is connected to 10h.
The connection side contact terminal 120 is a member for receiving an electric signal from the core wire and transmitting the signal to the receiving side contact terminal of the jack. When the modular plug is fitted into the modular jack, the receiving side and connection side contact terminals are connected to each other. Connection terminal 1
The number 20 is the same as the number of the core wires 210, that is, eight. One of these connection-side contact terminals 120 is assigned to each core wire 210. These connection side contact terminals 120 can be attached from outside the housing 110. For this reason, an insertion groove 112 communicating with each core wire is provided at a position corresponding to each core wire, particularly at the insulating portion 116 of the housing 110. The connection-side contact terminal 120 is inserted into each core 2 through these insertion grooves 112.
10 can be pressed. The tip of the connection-side contact terminal 120 has a sharp shape, and the connection-side contact terminal 120 is electrically connected to its internal conductor through the insulation coating of each core wire by pressure contact with each core wire. You.

The connection-side contact terminals include long terminals 12 with long legs.
There are two types, 0A and short short terminal 120B. These terminals are alternately connected to the core. In the example of FIG. 2, the upper cords, ie, 210b, 210d, 2
Long terminals 120A are connected to 10f and 210h, and the lower cores, ie, 210a, 210c, 210e.
And 210g are connected to the short terminal 120B. When these terminals are placed in the housing, the long terminals 12
OA is positioned slightly above short terminal 120B. This shift is also effective in reducing crosstalk. FIG. 3 shows a cross section of the modular plug of FIG. 1 in its longitudinal direction. This figure clarifies the arrangement of the connection-side contact terminals viewed from the lateral direction. In the embodiment of FIG. 3, the long terminal 120A and the short terminal 120B, both of which are approximately half the area of the conventional terminal,
The terminals are alternately and staggered so that the press-contact positions to the core wires are alternately shifted so that the area portions of the terminals adjacent to each other in the horizontal direction do not overlap. Furthermore, only the long terminals 120A arranged alternately or the short terminals 120A
Paying attention to only B, they overlap, but they do not overlap between the adjacent long terminal 120A and short terminal 120B. As described above, the area of the conventional terminal is almost halved, and the overlap in the area with the adjacent terminal is substantially eliminated, so that the electromagnetic coupling and the electrostatic coupling between the terminals are reduced, and the crosstalk is reduced. It is possible to achieve reduction. It is needless to say that the area is not limited to half the area of the conventional terminal, and it is sufficient that the overlap in the area with the adjacent terminal is substantially eliminated.

FIG. 4 shows a modular plug according to another embodiment of the present invention in a form similar to FIG. In the embodiment of FIG. 4, only the area of the long terminal 120C is substantially half that of the conventional terminal, while the area of the short terminal 120D is substantially the same as the conventional terminal, and the area of the short terminal 120D is long. The area is approximately twice the area of the terminal 120C. Again, the long terminals 120C and the short terminals 120D are arranged so as to be alternately shifted at the same pressure contact position as in the embodiment of FIG. However, here, only the area of the long terminal 120C is reduced, so that a part of the area of the short terminal 120D,
That is, almost half and almost all of the area of the long terminal 120C overlap. As a result, when the modular plug is fitted into the modular jack, these receiving side and connection side contact terminals are connected at the same position, and a stable connection is obtained. In addition, in the embodiment of FIG. 4, there is an overlapping portion between the area portions of the contact terminals.
Regarding D, since most of the area portions are not overlapped, the effect of reducing crosstalk can be obtained as in the embodiment of FIG. It is needless to say that the long terminal is not limited to the half area of the conventional terminal, but it is sufficient that most of the area does not overlap. Alternatively, only the area of the short terminal may be reduced.

The modular plug 100 is assembled in the following procedure. First, prior to assembling, the cable 200 is inserted through an opening at the rear of the insulating case 300. At this stage, the insulating case 300 is free to move along the cable 200. Next, the cable 200 taken out through the opening
Of the core wire 210 with the guide plate 140 and the alignment member 13
Then, the two members are inserted and fixed into the inside of the housing 110, particularly the inside of the housing formed by the shield plate 114, from the rear thereof.
Further, along with this operation, the tip of each core wire 210 is positioned and fixed in the insertion hole of the insulating portion 116 of the housing 110. Next, the cable 200 is connected to the shield plate 1.
The periphery is pressed by a crimping part 111 provided on the extension part of 14 to fix it. After that, the connection-side contact terminals 120 are attached to the respective core wires 210 arranged on the housing 110 from outside the housing 110. Finally, the insulating case 300 is moved to the housing side along the cable 200 and covers the rear end of the housing 110, thereby completing the assembly of the modular plug. In order to fix the insulating case 300 to the housing 110, the housing 110, especially the shield plate 114 thereof, is provided with two locking projections 113, and the insulating case 300 has two locking holes 301 corresponding thereto. Is provided. When housing 110 is inserted into insulating case 300 by a predetermined amount, these locking projections 113 and locking holes 30
1 is engaged, so that the housing 110 can be locked and fixed inside the insulating case 300.

Next, the modular jack will be described. FIG. 5 is a perspective view of the modular jack, and FIG.
FIG. 7 is a front view of the modular jack of FIG. 5, FIG. 7 is a sectional view taken along line AA of FIG. 5, and FIG. 8 is a bottom view of the modular jack of FIG. 3 and 4
Modular plug 100 can be fitted to modular jack 500 in the orientation of FIG. 5 in the orientation of FIGS. Modular jack 500 is connected to housing 51
The housing 510 includes a housing main body 511 and an array block such as a shield case 513. The arrangement block is assembled to the housing body 511 before the receiving-side contact terminals 520 are fixed. still,
In this modular jack 500, the housing 510
Is composed of one part. In this case, the receiving contact terminal 520 is inserted into the housing 510 by press fitting.

An opening 515 for receiving the tip of modular plug 100 is provided on the front side of modular jack 500.
Is provided. The opening 515 has a shape complementary to the distal end of the modular plug. The modular plug 100 is inserted through the opening 515 of the modular jack 500 in the orientation of FIGS.
When pushed in by a predetermined amount, the modular plug 100
Can be locked and fastened to the modular jack 500. At the time of this locking and fixing, the locking portion 1 of the modular plug 100
15 are used. The locking portion 115 of the modular plug 100 has protrusions (not shown) extending laterally from each side edge of the distal end thereof, while the inside of the modular jack 500 corresponds to these protrusions. A convex portion (not shown) extending downward is provided. Modular plug 100 is modular jack 50
When the protrusion is pushed into the modular jack 500 by a predetermined amount, the protrusion is engaged with the inclined portion extending below the protrusion of the modular jack 500, and as a result, the locking portion 115 of the modular plug becomes
Displaced downward. As the insertion progresses, the projection (locking portion) is displaced downward, and when the projection just passes over the projection, the locking portion of the modular plug snaps upward and the modular plug 100 is connected to the modular jack 500. Fully mated. The fitted modular plug 100 can be easily pulled out from the modular jack by pulling the lock portion 115 while pushing it down.

The receiving contact terminals 520 of the modular jack 500 are arranged inside the modular jack 500 at a predetermined distance from the opening 515. The number of receiving-side contact terminals 520 is eight in accordance with the number of connection-side contact terminals 120 of the modular plug 100. As best shown in FIG. 7, each of these receiving contact terminals 52
0 denotes a fixing portion 521, a mounting portion 525, and an inclined portion 523.
Divided into The fixing portion 521 is provided with the receiving contact terminal 52.
0 is fixed to the modular jack 500.
The receiving contact terminal 520 is fixed by the fixing portion 521.
It is securely positioned at the bottom of modular jack 500. These fixing parts 521 are arranged at the bottom of modular jack 500 such that fixing parts adjacent to each other in the horizontal direction are alternately shifted in the height direction. Due to this shift, crosstalk is reduced.

The mounting portion 525 is a portion provided at the end of the fixed portion 521 opposite to the inclined portion 523. The attachment part 525 is used for electrical connection with the board. For this reason, the mounting portion 525 is provided so as to protrude from the bottom of the modular jack 500 to the board side, and when the modular jack is mounted on the board, it can be soldered to each corresponding pattern on the board. . The inclined portion 523 is
This is a portion provided at one end of the fixing portion 521. The inclined portion 523 is disposed inside the modular jack 500 so as to extend obliquely upward from the front to the rear, and is elastically displaceable downward. Modular plug 100 is modular jack 50
0, the connection-side contact terminal 120 of the modular plug 100 becomes the inclined portion 52 of the reception-side contact terminal 520.
At a relatively low position at the front edge of the inclined portion 523, the portion is engaged with the inclined portion 523 so as to cover the upper portion of the inclined portion 523. Connection terminal 1
This relatively low position of 20 is not changed even during the insertion, so that as the modular plug 100 is pushed in, the inclined portion 523 is connected to the connection-side contact terminal 12.
It is displaced downward by 0. As a result, complete electrical connection between the connection side contact terminal 120 and the reception side contact terminal 520 is enabled. However, the amount of displacement of the inclined portion at this time depends on the arrangement and shape of the connection-side contact terminals.

For example, when the modular plug 100 according to the embodiment of FIG. 3 is inserted, in this modular plug, as described above, the long terminals 120A and the short terminals 120B having substantially the same area are arranged so as to be shifted from each other. Therefore, the long terminals 120A arranged on the distal end side of the modular plug 100 are engaged more forward of the inclined portion 523 than the short terminals 120B arranged on the rear end side. For this reason, the inclined portion engaged with the long terminal 120A is displaced more greatly than the inclined portion engaged with the short terminal 120B, and as a result, the inclined portions adjacent to each other in the lateral direction are alternately shifted. State. This shift can be effective in reducing crosstalk in the inclined portion. As described above, the long terminal 120A is the short terminal 1
Since it is positioned slightly higher in the housing than 20B, this displacement of the inclined portion is correspondingly small, but even in this case, it is sufficient to obtain the effect of reducing crosstalk. On the other hand, when the modular plug of FIG.
Since 20D is engaged at substantially the same position on the inclined portion, the amount of displacement of the inclined portion is substantially equal.

FIG. 8 clarifies the shape of the fixing portion 521 of the receiving contact terminal 520 and the arrangement of the mounting portions 525. Each receiving contact terminal in FIG. 8 is also assigned a number 520a to 520h corresponding to the number of each core wire in FIG. As a result, the receiving-side contact terminals of FIG. 8 also correspond to 520a and 5c corresponding to the core wires of the modular plug of FIG.
Pairs are formed between 20b, 520d and 520e, 520g and 520h, and between 520c and 520f, respectively. Of course, these numbers are also applied to the fixed part and the mounting part which constitute the receiving contact terminal. As is clear from FIG. 8, the fixing portions of all receiving contact terminals except 520d and 520e are expanded in the lateral direction so as to be away from the center of the main body of the modular jack. The degree of expansion in the lateral direction is greater at a fixed portion away from the center of the main body, and 520
It is substantially equal between the fixed portions a and 520b, between the fixed portions 520d and 520e, and between the fixed portions 520g and 520h. A pair is formed between these fixing parts. Note that the fixing portions of 520c and 520f are expanded in opposite directions with respect to the center of the main body. On the other hand, in addition to such expansion in the horizontal direction, each fixing portion is also expanded in the vertical direction. The degree of expansion in the vertical direction is 520a, 520c, 520e, and 520g.
520b, 520d, 5
Equal between the fixed parts of 20f, 520h. However, the latter has a larger degree of expansion than the former. Depending on the shape of the fixing part 521, the mounting part 525 may also be 520a and 520b, 520d and 520 in the lateral direction.
e, 520 g and 520 h are arranged so as to form a pair, and are arranged so as to be shifted in the longitudinal direction. As described above, the cross-talk due to the electromagnetic coupling and the electrostatic coupling generated between the pairs is reduced by increasing the pitch between the pairs of the receiving-side contact terminals, particularly, at the fixing portion 521 and the mounting portion 525 thereof. It is possible to do. Since the distance between the pair of 520c and 520f is large, the crosstalk between the pair is substantially reduced.

FIG. 9 shows another form of modular jack 5.
00A shows a perspective view. This modular jack 500A has a so-called two-piece configuration in which a housing 510A and a cover 540A are separately provided, unlike FIG. Also, the receiving contact terminal 520A
Is one cover 540A for all the fixing parts of each contact terminal.
And are integrally formed. These receiving contact terminals 520A are integrated into the housing 510A from the rear side of the housing body 511A after the arrangement block is assembled. The mounting portion of the receiving contact terminal 520A is not provided so as to be connected to the fixing portion as shown in FIG. 5, but is provided as a separate component of the receiving contact terminal. For other points, see FIG.
Can be considered as well. Of course,
The modular jack is not limited to those shown in FIGS. 5 and 9, and may be a conventional modular jack.

FIG. 10 is a graph showing the crosstalk obtained by the present invention in comparison with a conventional modular plug. In the graph, the horizontal axis represents the frequency (M
Hz), and the vertical axis means crosstalk (dB). As is clear from this graph, according to the modular plug of the present invention, it is possible to increase the crosstalk by about 10 dB at the maximum. Naturally, the number of twisted pairs, the number of corresponding through holes in the guide plate and the alignment member, the number of insertion holes in the housing, and the number of contact terminals are limited to those described above. Not something.

[0028]

According to the modular plug, a plurality of twisted pairs are aligned and held for each twisted pair by the guide plate, thereby reducing crosstalk between the twisted pairs. Further, the guide plate is made of metal, so that crosstalk can be reduced more effectively. Furthermore, in the modular plug, by eliminating and reducing the overlap of the connection side contact terminals,
Crosstalk generated between these terminals is reduced.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a modular plug according to an embodiment of the present invention.

FIG. 2 is a front view of a housing of the modular plug.

FIG. 3 is a sectional view of a modular plug according to an embodiment of the present invention.

FIG. 4 is a sectional view of a modular plug according to another embodiment of the present invention.

FIG. 5 is a perspective view of a modular jack.

FIG. 6 is a front view of the modular jack of FIG. 5;

FIG. 7 is a cross-sectional view of the modular jack of FIG. 5 along AA.

FIG. 8 is a bottom view of the modular jack of FIG. 5;

FIG. 9 is a perspective view of another embodiment of a modular jack.

FIG. 10 is a graph showing frequency vs. crosstalk of a modular plug in comparison with a conventional device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 100 Modular plug 120 Connection side contact terminal 130 Alignment member 140 Guide plate 300 Insulation case 500 Modular jack 520 Receiving side contact terminal 530 Connection part

Claims (7)

[Claims] 1. A modular plug for electrically connecting a plurality of twisted pairs formed as a set of two core wires into an opening of a modular jack, wherein the plurality of twisted pairs are separated for each twisted pair. A guide plate to be aligned, a housing for positioning and fixing the twisted pair separated and aligned by the guide plate for each core forming the twisted pair, and connected to each core fixed by the housing. A modular plug comprising: each contact terminal; 2. The modular plug according to claim 1, wherein said guide plate is made of metal. 3. The modular plug according to claim 1, wherein the housing fixes the laterally adjacent core wires so as to be shifted from each other in the height direction. 4. A modular plug for inserting a plurality of connected core wires into an opening of a modular jack and electrically connecting the plurality of core wires, a guide plate for separating and aligning the plurality of core wires, and a guide plate. And a contact terminal connected to each of the core wires positioned and fixed by the housing. A modular plug, which is arranged so as not to substantially overlap with an area part of an adjacent contact terminal. 5. The modular plug according to claim 4, wherein the contact terminals are arranged such that an area thereof is overlapped only with a part of an adjacent contact terminal. 6. The modular plug according to claim 4, wherein the contact terminals are arranged such that the area portions of adjacent contact terminals are shifted in the longitudinal direction of each core wire. 7. The modular plug according to claim 4, wherein the contact terminals are arranged such that the area portions of the contact terminals adjacent to each other in the lateral direction are shifted in the height direction.