JP2003249316A - Modular jack - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a modular jack capable of preventing cross talk. <P>SOLUTION: This modular jack 1 has spring jack wires L1-L8 and quick connection terminals T1-T8 respectively connected to L1-L8. In the spring jack wires, L1 and L2, L3 and L6, L4 and L5, and L7 and L8 form wire pairs. In the quick connection terminals, T1 and T2, T3 and T6, T4 and T5, and T7 and T8 form wire pairs. The spring jack wires L1-L8 are sequentially arranged side by side. The quick connection terminals are so arranged that the wire pairs are arranged side by side, T1 is adjacent to T3, and T4 is adjacent to T6. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is for use in combination with a modular plug, and particularly LA
It relates to a modular jack suitable for use in N.

[0002]

2. Description of the Related Art Conventionally, it is well known to use a modular plug and a modular jack for electrically connecting a cable composed of a plurality of conductors such as a LAN cable. In a modular plug for a LAN cable, eight parallel conductors A1 to A8 form a connection terminal with a modular jack, and conductors A1 and A2, A3 and A6, A4 and A5, A7 and A8 form a line pair. Is done.
In the other modular jack, eight parallel spring jack wires B1 to B8 form input / output connection terminals with the modular plug. The spring jack wires B1 to B8 are electrically connected to one ends of conductors extending in the front-rear direction of the modular jack, and the other ends of the conductors are spring jack wires B1 to B1.
It is electrically connected to an input connection terminal different from B8.

[0003]

In such a modular jack, there is a problem in that cross talk occurs between conductors that are adjacent to each other and extend in parallel in the front-rear direction, and electrical noise is generated. In order to solve this problem, the electrical connector disclosed in Japanese Patent Laid-Open No. 6-84562 discloses an IDC (Insulation-Displacemen) at the end of the conductor.
T Connector) forms an input / output terminal and crosses the lead frame between the IDC and the spring jack wire to reduce crosstalk. However, if a quick-connect terminal formed by housing a conductor spring in a conductive metal frame is used in place of the IDC that is an input / output terminal, the amount of crosstalk between adjacent quick-connect terminals is large, so that the lead frames cross each other. However, the related art cannot reduce the crosstalk to a sufficient level. For example, even if the above-mentioned conventional technique is applied to a modular jack using a quick-connect terminal, it is not possible to obtain a connector that satisfies the characteristics required for Category 5 in TIA-568A.

An object of the present invention is to reduce crosstalk to a high level in a modular jack that uses a quick-connect terminal as one of the input / output terminals.

[0005]

[Means for Solving the Problems] In order to solve the above problems,
The object of the present invention is to have a front-back direction and a lateral direction which are orthogonal to each other, and a plurality of input / output terminals are provided in each of the front-rear and front-rear input-output A modular jack including eight spring jack wires, each of which has a plurality of intermediate connection portions electrically connected to each of the terminals, and one of the front and rear input / output terminals arranged in parallel with each other in the lateral direction.

The features of the present invention in such a modular jack are as follows. The spring jack wires include spring jack wires L1 to L8 arranged in order in the lateral direction. Of the spring jack wires, L1 and L2, L3 and L6,
Four sets of line pairs are formed by L4 and L5 and L7 and L8. The other of the input / output terminals is a quick-connect terminal T1 to T8 in which a conductor spring is housed in a conductive metal frame, and each of the quick-connect terminals T1 to T8 is connected to each of the spring jack wires L1 to L8. T1 and T2, T3 and T6, T4 and T are electrically connected through the intermediate connecting portion.
5, T7 and T8 form a pair corresponding to the four line pairs.
The quick-connect terminals T1 to T8 are arranged in a horizontal row so that the pair of quick-connect terminals are adjacent to each other, and the quick-connect terminal T3 is adjacent to the quick-connect terminal T1. The fast connecting terminal T4 is adjacent to T6.

In a preferred embodiment of the present invention, the quick connection terminals T1 to T8 are arranged in the horizontal row at equal intervals.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION The details of the modular jack according to the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is an exploded perspective view of the modular jack 1. The modular jack 1 is suitable for use in a LAN and is composed of a terminal assembly 2 and a jack frame 3, and has a front-rear direction indicated by a double-headed arrow A and a lateral direction indicated by a double-headed arrow B. The up and down directions of the modular jack 1 are these two directions A and B.
Is orthogonal to. The terminal assembly 2 has eight spring jack wires L1 to L8 that form input / output terminals on the front side (left side in the drawing), and the wires L1 to L8 are housed in the mounting groove 6 of the dielectric block 4, Terminal assembly 2
Are arranged in parallel in the horizontal direction B at equal intervals. Further, the terminal assembly 2 has eight quick-connect terminals T1 to T8 forming input / output terminals at the rear (right side in the figure), and the quick-connect terminals T1 to T8
The printed circuit board 8 is interposed between and the spring jack wires L1 to L8. The spring jack wires L1 to L8 are L1 and L2, L3 and L6, L4 and L5.
L7 and L8 form four pairs of wire pairs, and each of these spring jack wires L1 to L8 is electrically connected to each of the quick-connect terminals T1 to T8 via the printed circuit board 8. There is. In the figure, a spacer 9 is interposed between the spring jack wires L1 to L8 and the printed board 8, and the printed board 8 has an insertion protrusion 8a in front thereof.

The jack frame 3 includes a front wall 31, a rear wall 32, side walls 33 and 34, a bottom wall 36, and a top opening 3.
7, and the terminal assembly 2 is removably accommodated inside the frame 3 through the opening 37. A modular plug insertion port 11 is formed on the front wall 31 and the insertion port 11
A printed circuit board insertion port 12 is formed above.
When the terminal assembly 2 enters the opening 37 from the upper side of the drawing, when the vicinity of the insertion opening 12 is slightly elastically deformed in the direction of the double-headed arrow A, that is, in the direction of arrow C, and then returned, the protrusion of the printed circuit board 8 is formed. The portion 8a fits into the insertion opening 12. The terminal assembly 2 and the jack frame 3 thus assembled form a modular jack 1 which does not easily come off from each other. Modular jack 1
It is used by being attached to a wall or device as it is, or by being housed in a housing that covers the outside and then attached to a wall or device.

2, 3 and 4 are a rear view of the terminal assembly 2 in FIG. 1, a rear surface of the modular jack 1 in which the terminal assembly 2 is assembled to the jack frame 3, and a quick-connect terminal which is an example of a quick-connect terminal. It is a perspective view of a terminal T7. 8 which is one of the input / output terminals of the modular jack 1
The individual quick connection terminals T1 to T8 correspond to the wire pairs of the spring jack wires L1 to L8, and are T1 and T2, T3 and T6.
T4 and T5, T7 and T8 are paired respectively, totaling 4
It forms a pair of lines. As is clear from FIG. 2, the quick-connect terminals T1 to T8 of each set are T2, T1, T from right to left.
3, T6, T4, T5, T8, and T7 are arranged in a row in the horizontal direction B at equal intervals. When the terminal assembly 2 is assembled to the jack frame 3, the eight external terminal insertion openings 38 formed on the rear wall 32 of the jack frame 3 are formed.
Each of the quick-connect terminals T1 to T8 is arranged in the back of each. An external terminal (not shown) is electrically connected to any of the quick-connect terminals T1 to T8 through the insertion port 38.

As shown in FIG. 4, each of the quick-connect terminals T1 to T8 has a conductor metal frame 21 and two conductors which are press-fitted into the metal frame 21 in a state of being bent into a substantially S shape. A spring 22 and a wiring for intermediate connection (not shown) provided on the board 8 extending from the top of the metal frame 21 to the printed board 8.
And a conductor ribbon 23 electrically connected to the conductor ribbon 23. Gold frame 2
1 is a groove portion 51 extending in the lateral direction in FIG.
1, spring storage portions 52 formed above and below 1,
53, and the conductor springs 22 are press-fitted into the respective storage portions 52, 53. In each of the quick-connect terminals T1 to T8, in one of the spring accommodating portions 52 and 53, the one end portion 26 is partially interposed between the portion 24 of the metal frame 21 and the one end portion 26 of the spring 22 which are in pressure contact with each other. External terminals (not shown) can be press-fitted in the direction of arrow M while elastically deforming so as to be separated from 24.

Either of the two springs 22 accommodated in the metal frame 21 may be used, and even if one spring 22 is used in an external terminal, the communication line of the external terminal is not disconnected. , Another separate external terminal can be connected to the metal frame.

In such a terminal assembly 2, the crosstalk between the pair of L3 and L6 and the pair of L4 and L5 forming a line pair in the spring jack wires L1 to L8 which are parallel to each other, for example, from L3 to another line pair. For crosstalk to L4, the quick-connect terminals T3 to T6 connected to the spring jack wires L3 to L6 form pairs T3 and T6 and T4 and T4.
5 in the lateral direction B and T4 in T6 are adjacent to each other to generate a crosstalk from T6 to T4 having a phase opposite to the crosstalk from L3 to L4. A cancellation effect can be obtained. Further, the crosstalk from L2 of the line pair of L1 and L2 to L3 of another line pair is T1 to T3 which is in a phase opposite to the crosstalk from L2 to L3 by placing T1 adjacent to the quick-connect terminal T3. A crosstalk to the crosstalk can be generated, and a crosstalk cancellation effect can be obtained between these line pairs. In the case of the modular jack 1 of the illustrated example formed in this way, the crosstalk can be reduced to the level of Category 5 of T1A-568A. However, it is preferable that the distance between the quick-connect terminals T1 to T8 adjacent to each other is suppressed to such an extent that the canceling effect does not become excessive.

5 (a), (b), (c), (d),
(E), (f) and (g) are drawings similar to FIG. 2 showing an embodiment of the present invention. In any of the modes (a) to (g), the quick-connect terminals T3 and T6, T4 and T5 are adjacent to each other, T1 is adjacent to T3, and T4 is adjacent to T6. Among these modes, the terminal assembly 2 of (a) is the same as the terminal assembly 2 of FIG. 2 except that the order of the quick-connect terminals T7 and T8 is reversed.
In the terminal assembly 2 of (b), the position of the pair of quick-connect terminals T7 and T8 is different from that of FIG. The terminal assembly 2 of (c) is the same as the terminal assembly 2 of (b) except that the order of the quick-connect terminals T7 and T8 is reversed.
The terminal assembly 2 of (d) is the quick-connect terminals T1 to T of FIG.
The arrangement of 8 is turned inside out. The terminal assembly 2 of (e) is the same as the terminal assembly 2 of (d) except that the order of the quick-connect terminals T7 and T8 is reversed.
The terminal assembly 2 of (f) has the quick connection terminals T1 to T1 of (b).
The arrangement of T8 is turned inside out. In the terminal assembly 2 of (g), the arrangement of the quick-connect terminals T1 to T8 of (c) is reversed. These terminal assemblies 2 of (a) to (g) also have a canceling effect on the crosstalk between T3 and T5 and T4 and T6 and a canceling effect of the modular jack 1 as a whole.

FIG. 6 is a drawing similar to FIG. 2 showing an example of the terminal assembly 2. In this terminal assembly 2, each of the metal frames 21 has one spring accommodating portion 52.
And one spring 22.

When the modular jack 1 of the present invention is used for a LAN, the spring jack wires L1 to L8 and the quick-connect terminals T1 to T8 shown in the drawing are used.
And act as both input and output terminals.

[0018]

In the modular jack according to the present invention, the quick-connect terminals T1 to T8 electrically connected to the parallel spring jack wires L1 to L8 are paired with the quick-connect terminals T3 and T6 and T4 and T5 adjacent to each other. Since the quick connect terminal T6 is adjacent to T4, the crosstalk between the paired L3 and L6 and the paired L4 and L5 can be canceled. Further, since T1 is adjacent to the quick-connect terminal T3, the crosstalk between the paired L3 and L6 and the paired L1 and L2 has a canceling effect. Thus, this modular jack is excellent at canceling crosstalk.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a modular jack.

FIG. 2 is a rear view of the terminal assembly.

FIG. 3 is a rear view of the modular jack.

FIG. 4 is a perspective view of a quick-connect terminal.

FIG. 5 is a drawing similar to FIG. 3 showing a preferable arrangement of the quick-connect terminals according to (a) to (g).

FIG. 6 is a drawing similar to FIG. 2, showing an example of an embodiment of the invention.

[Explanation of symbols]

1 modular jack 2 terminal assembly 21 gold frame 22 spring T1 to T8 terminals (fast connection terminals) L1 to L8 terminals (spring jack wire) A front-back direction B horizontal direction

Claims (2)

[Claims] 1. A front-rear direction and a lateral direction that are orthogonal to each other, and a plurality of input / output terminals are provided in each of the front-rear direction and each of the front-rear input-output terminals interposed between the front-rear input-output terminals A modular jack including eight spring jack wires, each of which has a plurality of intermediate connecting portions electrically connected to each other, and one of the front and rear input / output terminals arranged in parallel with each other in the lateral direction, wherein: , The spring jack wires L1 to L8 arranged in order in the lateral direction, and among the spring jack wires, L1 and L2, L3 and L6, L4 and L5, and L7 and L8 form four sets of wire pairs. The other of the output terminals is a quick-connect terminal T1 to T8 in which a conductor spring is housed in a conductive metal frame, and each of the quick-connect terminals T1 to T8 is the splice. T1 and T2, T3 and T6, and T4 by electrically connecting to each of the jack jack wires L1 to L8 through the intermediate connection portion.
And T5 and T7 and T8 form a pair corresponding to the four pairs of lines, and the quick-connect terminals T1 to T8 are arranged in a horizontal row so that the pair of quick-connect terminals are adjacent to each other, A modular jack, wherein the quick-connect terminal T3 is adjacent to the quick-connect terminal T1, and the quick-connect terminal T6 is adjacent to the quick-connect terminal T4. 2. The modular jack according to claim 1, wherein the quick-connect terminals T1 to T8 are arranged in the horizontal row at equal intervals.