JP3316726B2 - Electrical connection - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric connector for connecting an electric cable for transmitting a high-speed signal.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 5, a twisted pair of wires 50, 51 and 52 is loosened and an electric wire 500,
501, 502, 503, 504, and 505 in the X direction
After being arranged in a row, the locking projections 111, 112, 113, 1
14 (114 is not shown) and lock levers 204, 20
5 (204 are not shown), and fixing the holding plate 200 to the housing 110, the electric wires 500, 50
1, 502, 503, 504, 505 into the housing 11
0, the connection terminals 300, 301,
302, 303, 304, and 305 (302 to 305 are not shown).
There was 0.

As shown in FIG. 6, twisted pair wires 50,
The wires of the wires 500, 502, 50 are loosened by untwisting the wires 51, 52.
4 and the electric wires 501, 503, 505 are divided into two rows in the Y direction, and then the electric wires 500, 502, 504 and the electric wires 501, 5
03, 505 are aligned in the X direction, and the locking projections 1
21, 122, 123, 124 (123, 124 are not shown), locking holes 212, 214 and 222, of locking levers 211, 213 and 221, 223 (211, 223 not shown). 224 (21
2, 214, and 224 are not shown) to engage the holding plate 2
10 and 220 are fixed to the housing 120 so that the connection terminals 31 opposed to each other with the housing 120 interposed therebetween.
0, 312, 314 (312, 314 are not shown) and connection terminals 311, 313, 315 (311, 313,
315 is not shown), there is a cable-side electrical connector 101 which presses the electric wires 500, 502, 504 and the electric wires 501, 503, 505.

In FIGS. 5 and 6, a cable clamp for fixing all twisted pair wires and a cover housing for holding the cable clamps and the electric connectors 100 and 101 are omitted.

[0005]

However, in the conventional first cable-side electric connector 100 shown in FIG. 5, the twisted pair wire 50 and the adjacent twisted pair wire 51 have the electric wire 501 at the untwisted portion. The distance between the electric wire 502 and the electric wire 502 is different from the distance between the electric wire 500 and the electric wire 503, so that the electrostatically coupled state of the adjacent twisted pair wire becomes unbalanced. For this reason, the crosstalk of the electric connector becomes large, and high-speed signals cannot be transmitted. Furthermore, for example, in order to ensure electrical insulation between the electric wire 500 pressed into contact with the connection terminal 300 and the connection terminal 301, the connection terminals 300 and 30
1,302,303,304,305 (302-305
(Not shown) need to be wide in the X direction, and there is a problem that the electric connector cannot be downsized.

In the conventional second cable-side electric connector 101 shown in FIG. 6, for example, the untwisted portion of the twisted pair wire 50 is long and the electric wires 500 and 50 forming a pair are twisted.
Since the distance of 1 is increased, the degree of electromagnetic coupling between the adjacent twisted pair wires 51 increases. For this reason, crosstalk of the electric connector 101 becomes large, and high-speed signals cannot be transmitted. Further, twisted pair wires 50, 51, 52
After untwisting, the wires 500, 502, 504 and the wires 501, 503, 505 are divided into two rows in the Y direction, and then the wires 500, 502, 504 and the wires 501, 50
3, 505 must be arranged in the X direction, and the wires 500, 502, 504 and the wires 501,
Since the tip positions of 503 and 505 must be aligned in the Z direction, there is also a problem that the workability of aligning is very poor. Further, the connection terminals 310, 312, 314 (312, 3
14 are not shown) and connection terminals 311, 313, 31
5 (311, 313, 315 are not shown), the holding plates 210, 220 are fixed to the housing 120, so that the dimension of the cable-side electric connector 101 in the Y direction is increased. Further, in order to fix the holding plates 210 and 220 to the housing 120, the lock levers 211 and 21 are required.
3 and lock levers 221 and 223 (211 and 223).
(Not shown) must be secured, and the dimension in the Z direction becomes large, so that there has been a problem that the electric connector cannot be miniaturized.

Accordingly, the present invention has been made in view of the above-mentioned conventional disadvantages, and an object of the present invention is to provide a cable which reduces crosstalk induced from an adjacent twisted pair and transmits a high-speed signal. An object of the present invention is to provide a small-sized electric connector that can be connected and that can easily perform a straightening operation.

[0008]

In order to achieve this object, a wire provided with an insulating coating is press-fitted into a groove provided in a connection terminal and connected, and a pressing plate is placed over the wire. In a press-connecting type electric connector for preventing the application of external force to the electric wire connection part, at a position corresponding to the middle of a connection terminal pair where a twisted pair wire obtained by twisting two coated electric wires with each other is press-fitted, A twisted wire receiving hole for inserting and holding the twisted wire in pairs is provided in the holding plate.

The present invention also provides the above electric connector,
At a point before the wire-laying operation for aligning the twisted pair wires to press-fit the twisted pair wires into the connection terminals and connect them, the cable clamp having a function of mechanically deforming and fixing the twisted pair wires is used. The twisted pair wire is fixed to the holding plate by coupling to a plate.

[0010] The present invention also provides the above electric connector,
It is characterized in that adjacent ones of the twisted pair wire receiving holes are connected by a gap having a width smaller than a diameter of an electric wire constituting the twisted pair wire.

According to the present invention, the untwisted portion of the twisted pair wire can be shortened, and the electric wires constituting the twisted pair wire can be closely adhered to each other. The degree of physical coupling can be reduced. Therefore, since crosstalk in the electric connector can be reduced, a high-speed signal can be transmitted. Furthermore, since the twist may be loosened after the twisted pair wire is inserted into the holding hole of the holding plate, the workability of the straightening can be improved. In addition, since the connection terminals forming the pair can be arranged facing each other on the upper surface of the housing, the size of the electrical connection device can be reduced.

Further, according to the present invention, in addition to the above-described operation, the twisted pair wire is arranged at a point before the wire-laying operation for aligning the twisted pair wire for press-fitting and connecting the twisted pair wire to the connection terminal. Can be fixed to the holding plate. Therefore, there is no need to fix the cable composed of the twisted pair wires externally or to adjust the fixed state such that the lengths of the twisted pair wires are equalized from the external cable fixing place in order to prevent the cable from being biased. As a result, the workability of straightening can be further improved. Further, according to the present invention, in addition to the above-described operation, the interval between the twisted pair wire receiving holes can be shortened, so that the electric connector can be further downsized.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a partially cutaway perspective view of a press-contact type electric connector according to a first embodiment of the present invention, showing an example of an electric connector for connecting a cable and a board. FIG. 2 is a partially cutaway perspective view of a holding plate of the electric connector according to the present invention.

The twisted pair wires 50, 51, and 52 pass through the twisted pair wire receiving holes 21, 22, and 23 of the holding plate 20, respectively, and untwist at the lower surface of the holding plate 20, leaving the insulating coating applied. After the wires 500, 502, and 504 and the wires 501, 503, and 505 with the insulating coating applied are divided into two rows, the wires are arranged in the X direction. Then, the connection terminals 30,
The holding plate fixing projections 11, 12, 13, 14 (14 are not shown) of the housing 10 accommodating 31, 32, 33, 34, 35 (32 to 35 are not shown) and the lock lever 24, 25 and the holding plate 20
Is fixed to the housing 10. At this time, electric wires 500, 5
02, 504 and electric wires 501, 503, 505 are press-fitted into grooves provided in connection terminals 30, 32, 34 and grooves provided in connection terminals 31, 33, 35 (32 to 35 are not shown), respectively. Is done. At this time, twisted pair wire 50,5
1, 52 are connection terminals 30, 31, 32, 33, 34,
The twisted state is maintained up to just before 35 (32 to 35 are not shown). After that, the electric wires 500, 501, 502, 503, 5
The connection work is completed by cutting the extra length of 04,505. When the holding plate 20 is fixed, the connection terminals 3
0, 31, 32, 33, 34, and 35 (32 to 35 are not shown) protruding from the housing 10 are accommodated in the holding grooves 26, 27, 28, 26 ', 27', 2 'of the holding plate 20.
8 '(26', 27 ', 28' are not shown).

The cable-side electrical connector 1 thus connected is mounted on the board-side electrical connector 2 using the housing 60 of the board-side electrical connector as a guide, so that the twisted pair wire 50 is connected to the board-side electrical connector, respectively. Connection terminal 7 for electrical connector
At 0, 71, the twisted pair wire 51 can be connected to the connection terminals 72, 73 of the board-side electrical connector, and the twisted pair wire 52 can be connected to the connection terminals 74, 75 of the board-side electrical connector.

In the electric connector having the above structure, the twisted pair wire 5
0, 51, and 52 are connection terminals 30, 31, 32, 33,
Since the twist is not loosened to the immediate vicinity of 34, 35 (32 to 35 are not shown), it is possible to improve the imbalance of the electrostatic coupling with the adjacent twisted pair wire. Further, the diameters of the twisted pair wire receiving holes 21, 22, and 23 are changed to the electric wires 500, 50.
If the diameter is about twice the diameter of 1,502,503,504,505, even if the twist is loosened in the twisted pair wire receiving hole, the wires constituting the pair can be in close contact with each other. The degree of electromagnetic coupling can also be reduced. Therefore,
Crosstalk in the electric connector can be reduced, and high-speed signals can be transmitted. Also, the twist may be loosened after inserting the twisted pair wires 50, 51, 52 into the twisted pair wire receiving holes 21, 22, 23 of the holding plate 20, and the wires 500, 5 after completion of the pressure welding work.
01, 502, 503, 504 and 505 may be cut off, so that the electric wires 500, 501, 502, 503 and
The twist can be loosened without being concerned with the length of 504 and 505 without worrying about the length, and the workability of the straightening can be improved. Further, a pair of connection terminals 30, 31 and connection terminals 32, 33 (32, 33 are not shown) and a connection terminal 3
4, 35 (34, 35 are not shown) can be arranged on the upper surface of the housing 10 so as to face each other in the Y direction, so that the electric connector can be downsized.

It is needless to say that the housing 10 and the holding plate 20 are not limited to the structure shown in FIG. Also, it goes without saying that the cross-sectional shape of the twisted pair wire receiving holes 21, 22, 23 is not limited to a circular shape, but may be any shape such as an elliptical shape, a square shape, or the like that can accommodate the twisted pair wire.

FIG. 3 is a partially cutaway perspective view of an example of a holding plate and a cable clamp of an electric connector according to a second embodiment of the present invention. The difference from FIGS. 2
That is, the cable clamps 40 and 41 are connected to 0 '. The other parts of the electrical connector have the same configuration as in FIG.

The cable clamp 40 has semicircular grooves 42, 4
4 and 46, and the semicircular groove 4 is also formed in the cable clamp 41.
3, 45, 47 (43 not shown) are formed. When the cable clamps 40 and 41 are overlapped, the semicircular grooves 42 and 43 (43 not shown), 44 and 45, 46 and 47 become round holes, respectively.
Wires 500, 501, 50 constituting 0, 51, 52
It is set to be smaller than twice the diameter of 2,503,504,505. Semicircular groove 4 of cable clamp 40
Twisted pair wires 50, 51, 52 are attached to 2, 44, 46, respectively, and the cable clamp 41 is overlapped.
Twisted pair wires 50, 51, and 52 each have a twisted pair wire accommodation hole 2
The cable clamps 40, 41 are inserted into the openings 29 of the holding plate 20 'so as to enter the positions 1, 2, 23. At this time, the cable clamp fixing holes 291,
91 '(291' is not shown) and the cable clamp 41
Of the cable clamp 40 and the protrusion 49 of the cable clamp 40 (4
9 are not shown), and the cable clamps 40, 4
1 is integrated with the holding plate 20 ', and twisted pair wires 50, 51,
52 is fixed to the holding plate 20 '. For this reason, the twists of the twisted pair wires 50, 51, 52 are loosened and the electric wires 500, 50
2, 504 and electric wires 501, 503, 505, when the wires are arranged in two rows, the cable composed of the twisted pair wires 50, 51, 52 is fixed externally so that it does not move, or the twisted pair wire is used. There is no need for an adjusting operation to equalize the lengths of the 50, 51, 52 from the external fixed place to prevent the cables from being shifted. Therefore, the workability of the straightening is greatly improved. Moreover, similarly to the first embodiment, the twisted pair wires 50,
The twist of 51, 52 is the connection terminal 30, 31, 32, 33,
Since it is held immediately before 34 and 35 (32 to 35 are not shown), a high-speed signal can be transmitted.

It is needless to say that the shape of the twisted pair wire fixing portion of the cable clamps 40 and 41 is not limited to a semicircular groove narrower than the cable, and may be any shape that can hold the cable. In addition, cable clamp 4
It goes without saying that the connecting portion between 0, 41 and the holding plate 20 'is not limited to the structure shown in FIG. Further, it goes without saying that one of the cable clamps 40 and 41 may be formed integrally with the holding plate 20 '.

FIG. 4 is a partially cutaway perspective view of an example of a pressing plate of an electric connector according to a third embodiment of the present invention.
3 is different from that of FIG.
1, 22, 23 are connected to electric wires 500, 501, 502, 50
Connecting hole 2 having a width smaller than the diameter of 3,504,505
1 'and 22'. The other parts of the electric connector have a configuration according to FIGS.

Twisted pair wire receiving holes 21 and 2 of holding plate 20 "
Reference numerals 2, 23 denote electric wires 500, 501, 502, 503, 504, 5, 5 which constitute the twisted pair wires 50, 51, 52, respectively.
The connecting holes 21 ′ and 22 ′ have a width smaller than the diameter of the connecting hole 05. In the holding plate 20 ″ having such a configuration, for example, even if the wires 500 and 501 are arranged after the twisted pair wires 50 are inserted into the twisted pair wire receiving holes 21, the wires 500 and 501
Does not move toward the adjacent twisted pair wire receiving hole 22.
Accordingly, the holding plate 20 ″ shown in FIGS.
A function equivalent to 20 'can be provided. further,
The twisted pair wire receiving holes 21, 22, 23 are connected to the connecting holes 21 ', 2
2 ', the resin does not need to be poured between the twisted pair wire receiving holes 21, 22, and 23 when the holding plate 20 "is formed.
Since the arrangement interval of 2, 23 can be shortened, the electric connector can be further downsized.

According to the first embodiment, the untwisted portion of the twisted pair wire can be shortened, and the electric wires constituting the twisted pair wire can be adhered to each other. Unbalance and electromagnetic coupling can be reduced. Therefore, since crosstalk in the electric connector can be reduced, a high-speed signal can be transmitted. Furthermore, since the twist may be loosened after the twisted pair wire is inserted into the holding hole of the holding plate, the workability of the straightening can be improved. In addition, since the connection terminals forming the pair can be arranged facing each other on the upper surface of the housing, the size of the electrical connection device can be reduced.

According to the second embodiment, the first embodiment
In addition to the operation of the embodiment of the present invention, the twisted pair wire can be fixed to the holding plate before the wire-laying operation of aligning the twisted pair wire to press-fit the twisted pair wire into the connection terminal and connect. Therefore, there is no need to fix the cable composed of the twisted pair wires externally or to adjust the fixed state such that the lengths of the twisted pair wires are equalized from the external cable fixing place in order to prevent the cable from being biased. As a result, the workability of straightening can be further improved.

According to the third embodiment, the first
In addition to the operation of the second embodiment, the interval between the twisted pair wire receiving holes can be shortened, so that the electric connector can be further downsized.

[0026]

As described above, according to the present invention, a twisted pair in which a twisted pair is inserted and held at a position corresponding to the middle of the connection terminal pair to which the twisted pair is press-fitted and connected. By providing the wire receiving hole in the holding plate, the untwisted portion of the twisted pair wire can be shortened, and even the untwisted portion can tightly contact the wires forming the pair. For this reason, the imbalance in the electrostatic coupling with the adjacent twisted pair wire can be improved, and the degree of electromagnetic coupling can be reduced. Therefore, since crosstalk in the electric connector can be reduced, a high-speed signal can be transmitted. Further, since the twist can be loosened after the twisted pair wire is inserted into the twisted pair wire receiving hole of the holding plate, the workability of the straightening can be improved. In addition, since the connection terminals forming the pair can be arranged facing each other on the upper surface of the housing, the size of the electrical connection device can be reduced.

Further, according to the present invention, the twisted pair wire can be fixed to the holding plate before the wire-laying operation for aligning the twisted pair wire for press-fitting and connecting the twisted pair wire to the connection terminal. Therefore, the cable composed of twisted pair wires can be fixed externally,
Since it is possible to omit the work of adjusting the fixed state such as equalizing the length of the twisted pair wire from the external cable fixing place in order to prevent the cable deviation, the workability of the straightening operation can be further improved. . Furthermore, since the cover housing can be omitted by connecting the holding plate and the cable clamp, the entire electric connector can be reduced in size. In addition, since the unbalance of the electrostatic coupling with the adjacent twisted pair wire and the degree of electromagnetic coupling can be reduced, crosstalk in the electric connector can be reduced, and a high-speed signal can be transmitted.

Further, according to the present invention, since the interval between the twisted pair wire receiving holes can be reduced, the electric connector can be further reduced in size. Further, the imbalance of the electrostatic coupling with the adjacent twisted pair wire can be improved and the degree of electromagnetic coupling can be reduced, so that a high-speed signal can be transmitted. In addition, since the twist can be loosened after the twisted pair wire is inserted into the twisted pair wire receiving hole of the holding plate, the workability of the straightening can be improved.

[Brief description of the drawings]

FIG. 1 is a partially cutaway perspective view of an electric connector according to a first embodiment of the present invention.

FIG. 2 is a partially cutaway perspective view of a pressing plate of the electric connector according to the first embodiment of the present invention.

FIG. 3 is a partially cutaway perspective view of a holding plate and a cable clamp of an electric connector according to a second embodiment of the present invention.

FIG. 4 is a partially cutaway perspective view of a holding plate of an electric connector according to a third embodiment of the present invention.

FIG. 5 is a partially cutaway perspective view of a conventional first electrical connector.

FIG. 6 is a partially cutaway perspective view of a second conventional electrical connector.

[Explanation of symbols]

1, 100, 101: cable-side electrical connector, 2: board-side electrical connector, 10, 110, 120: housing, 1
1,12,13,14,111,112,113,11
4, 121, 122, 123, 124 (14, 114,
123, 124 are not shown) ... projection for fixing the holding plate, 2
0, 20 ', 20 ", 200, 210, 220 ... Holding plate, 21, 22, 23 ... Twisted pair wire receiving hole, 21', 2
2 '... connecting hole, 24, 25, 205, 211, 213,
221, 223 (211, 223 not shown) ... lock lever, 26, 27, 28, 26 ′, 27 ′, 28 ′
(26 ', 27', 28 'are not shown) ... connection terminal receiving groove, 29 ... opening, 291, 291' (291 'is not shown) ... cable clamp fixing holes, 30, 31, 32,
33, 34, 35, 300, 301, 302, 303,
304, 305, 310, 311, 312, 313, 3
14, 315 (32, 33, 34, 35, 302, 30
3,304,305,311,312,313,31
4, 315 are not shown) ... connection terminals, 40, 41 ... cable clamps, 42, 43, 44, 45, 46, 47
(43 is not shown) ... semicircular grooves, 48, 49 (49 is not shown) ... cable clamp fixing projections, 50, 51, 5
2 ... twisted pair wire, 60 ... housing of board side electrical connector,
70, 71, 72, 73, 74, 75 ... connection terminals of the board-side electrical connector, 212, 214, 222, 224 (21
2, 214, 224 are not shown) ... holes for fixing the holding plate, 5
00, 501, 502, 503, 504, 505 ... electric wires.

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-8-7995 (JP, A) JP-A-62-245282 (JP, A) JP-A-62-284769 (JP, A) JP-A-6-24569 96810 (JP, A) JP-A-59-46775 (JP, A) JP-A-4-144078 (JP, A) JP-T-8-509837 (JP, A) (58) Fields investigated (Int. ⁷ , DB name) H01R 11/00 H01R 4/24

Claims (3)

(57) [Claims] 1. An electric wire with an insulating coating applied thereto is press-fitted into a groove provided in a connection terminal for connection, and a pressing plate is placed over the electric wire to prevent application of an external force to the electric wire connection portion. In a crimping type electric connector, a twisted pair wire obtained by twisting two coated wires is inserted into a pair of twisted pair wires at a position corresponding to the middle of a connection terminal pair to be press-fitted. An electrical connector, wherein a twisted pair wire holding hole for holding is provided in the holding plate. 2. The electrical connector according to claim 1, wherein the twisted pair wire is mechanically inserted before a wire-laying operation for aligning the twisted pair wire for press-fitting and connecting the twisted pair wire to a connection terminal. An electrical connector, wherein a cable clamp having a function of deforming and fixing the twisted pair is connected to the holding plate, and the twisted pair wire is fixed to the holding plate. 3. The electric connector according to claim 1, wherein the adjacent twisted pair wire receiving holes are connected to each other by a gap having a width smaller than a diameter of an electric wire forming the twisted pair wire. Characteristic electrical connector.