JPH06196224A - Shielded electric-connector assembly - Google Patents

Abstract

PURPOSE: To provide a compact electric connector assembly with excellent shield characteristic in which the crosstalk between conductors particularly in the vicinity of an electric terminal with a wire is prevented. CONSTITUTION: An electric terminal 560 having a cable conductor receiving part and a contact part with equipment side is arranged with an internal housing 520. The internal housing 520 is shielded by upper and lower shields 516 and 518. A crosstalk shield 524 consisting of at least one member and connected to an external shield is arranged within the internal housing 520. The flat cross talk shield 524 is extended from the position where the twisting of a cable conductor is substantially released to the terminal. Consequently, an effective shield can be attained in the vicinity of the electric terminal including the contact part with the cable conductor to suppress the crosstalk.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric connector, and more particularly to a shield type electric connector assembly having improved shielding characteristics and suitable for a LAN (local area network) or the like.

[0002]

2. Description of the Prior Art U.S. Pat. No. 4,501,459 discloses an electrical connector for a LAN used especially in the data communication industry. These electrical connectors are used in closed loop data communication networks in which various devices such as computer terminals are interconnected. These electrical connectors are particularly suitable for interconnecting multiple microcomputers or minicomputers in a microcomputer network in an office environment. This type of electrical connector has standard interface dimensions and shapes. These electrical connectors must be shielded so that false signals and noise do not adversely affect the signals in the network. In addition, these electrical connectors are also required to be shuntable because their conductors can become part of the network and be connected to other electrical connectors of the same kind. This shortability is necessary to avoid breaking the network when one of the plugs is not connected to an external device. The structure and components of this type of LAN connector are shown by the connector structure of the aforementioned U.S. Pat. No. 4,501,459. These electrical connectors include a number of spring-like tubular metal terminals having a crimping barrel structure for electrical connection with the individual conductors forming a multi-core coaxial cable. The terminal is disposed on the housing, and the upper and lower shields are disposed so as to surround the terminal and the housing. Outer shield members are permanently attached to the upper and lower cover members, the cover members engaged to cover the conductors and cover the upper and lower shields that shield the cable.

The conventional shielded electrical connector described above provides a shield around the connector to avoid interference with signals from outside the connector into the connector. Such connectors are widely used. However, conventional connectors have not taken into account signal crosstalk at the termination of each conductor when a pair of twisted pair conductors are twisted apart from each other (detwist). Therefore, the conventional electric connector can prevent the interference of the signal from the outside of the connector, but cannot suppress the crosstalk between the signal conductors inside the connector.

The interior of a conventional electrical connector is divided into four parts by four electrical terminals having wire connections which are interconnected with engaging contacts. Two twisted pair conductor pairs, which usually have a twist, are untwisted at the ends for a short distance and are interconnected to the terminals at the wire contacts. It is widely known that the crosstalk between each pair is reduced by the inductance balance by twisting the pair. Therefore, untwisting a short distance reduces the crosstalk compensation that is compensated by the twist. Untwisting is not a problem for low frequency signals, but transmitting high frequency signals causes signal interference between pairs.

[0005]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a low cost shielded electrical connector assembly which has an excellent electromagnetic and high frequency shielding function as well as a function of preventing crosstalk between adjacent pairs of signal conductors. Is to provide.

[0006]

SUMMARY OF THE INVENTION The present invention comprises an electrical terminal having a cable conductor receiving portion and a device side contact,
In a shielded electrical connector assembly having an inner housing supporting the electric terminal, an outer shield surrounding the inner housing, and an outer housing arranged outside the outer shield, at least one set of the adjacent electric connectors. A crosstalk preventing shield member is provided between the conductor receiving portions of the terminals, and is connected to the external shield.

In other words, in order to achieve the above-mentioned object of the present invention, there is provided a shield type electrical connector assembly having a specific insulating housing having a large number of electric terminals having specific terminal portions and wire terminating portions therein. provide. The wire termination includes a slot formed in the metal plate for crimp connection with the insulated wire and a stuffer cap for receiving one or more insulated wires. The stuffer cap is insertable over the wire termination to electrically connect the wire conductor to the electrical terminal. The electrical connector of the present invention includes a plate member on the stuffer cap, which is disposed between at least two openings and shields between adjacent wires.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A shield type electrical connector assembly of the present invention (hereinafter simply referred to as an electrical connector) will be described below with reference to the drawings. In FIG. 1, the inner housing 4 is shown. The inner housing 4 comprises a terminal receiving base 16 having a housing side wall 18 including a rear end recess 19. Terminal support 16
Includes a number of terminal receiving slots 20. Also the housing side wall
The outer surface of 18 includes a notch 22. The hood 24 is shown crossing over the two housing side walls 18. The hood lower surface 26 of the hood 24 is formed with a rib extending in the vertical direction by cutting into the surface (see FIGS. 1 and 2). Electrical terminal 30
Is a base portion 32 having at one end a wire barrel 34 having a slot (cable conductor receiving portion) 35 for pressing and receiving a wire conductor, and a contact portion formed by extending from the side opposite to the wire barrel 34 of the base portion 32. 36 and. The contact portion 36 has a step portion 38 formed at the tip of its free end.
The electrical terminal 30 further has a side tab portion 33 on which the terminal is arranged as described below.

The electric terminal 30 is received in the inner housing 4 by sliding in the terminal receiving slot 20 to a position where the contact portion 36 of the electric terminal 30 is adjacent to the front engaging end 40 of the inner housing 4, and engages with the mating connector. Be positioned to The inner housing 4 further has two vertical slots 44. A shunt bar is inserted in the slot 44. The shunt bar bridges the electrical terminals to selectively contact the step 38 of another terminal to provide a closed loop electrical connection as shown in FIG. This point is described in further detail in US Pat. No. 4,501,459. As shown in FIG. 3, the inner housing 4 further includes a bottom insulating block portion 46 located on the bottom surface thereof.

As best shown in FIGS. 2 and 3, the groove
The reference numeral 50 extends rearward from the front end 52 of the inner housing 4 along the terminal receiving member 53 and forms a groove 51 in the rear terminal receiving base 16.
Matches Two other terminal receiving members 54 and 55 (see FIG.
Receiving slot extending in the same direction as the central terminal receiving member 53 and having a T-shaped opening 58 for receiving the base portion 32 including the terminal side portion 56 and the terminal side tab 33 (see FIG. 1). Forming 20. As best shown in FIGS. 2 and 4, the window 60 extends through the bottom surface 48 and up through the central terminal receiving member 53 to intersect the groove 50. This point will be explained in detail below.

According to FIGS. 5 and 6, the outer housing part 70 is shown.
Includes a housing body 72 having upper and lower latch plates 74,76 joined by a integrally molded web. The upper and lower latch plates are pivotable in the lateral direction by the web. Upper and lower latch plates 74 and 76 include hermaphroditic latch members 78 and 80 conventionally used in data transmission connectors of this type. As best shown in FIG. 5, the housing body 72 includes a housing body side wall 82, which has latching openings 83 and 84 therethrough for use in a latch structure.

Referring to FIGS. 7-9, the back plate 95
Includes frame support members 96 and 98. Frame support member
96 includes a beg 99 and frame support member 98 includes a hole 100 for fitting with a peg. The back plates are formed so that the pegs 99 and the holes 100 are connected to each other by being overlapped with each other in the direction of FIG. The side plate 102 provides a latch arm 104 having a latching protrusion 106 extending midway between the frame support members 96 and 98 and extending outward.

Referring to FIGS. 10-12, the cable strain relief 110 includes halves 112 and 114 integrally molded at its lower end by a web 116. Each half 112, 114
Is an elastic inner finger 11 that presses and grips the cable to hold it from axial strain.
Including 8 The outer surface of the strain relief cooperates with the frame support members 96 and 98 to orient the openings 124 in each direction.

According to FIGS. 13 and 14, the lower shield 130 has a bottom plate portion 132 having a side wall portion 134 extending upward.
The bottom plate portion 132 has a shield tongue piece 136 extending forward from the front wall portion 138. Further, as best shown in FIG. 13, the ground contact member 140 extends forward from the front wall 138 and contacts the contact tongue 136.
And placed in the middle. The side wall portion 134 has a latch member 142 and a tab 146 formed by punching the side wall portion 134. The rear plate 148 extends upward from the bottom plate portion 132,
On its opposite side there is an integral crimping member 152 which includes a first tab member 150 and at the same time a crimping arm 154 which is crimped onto the braid of the shielded cable. Embodiments of the present invention allow a generally cylindrical crimping ferrule to be inserted over crimping arm 154 to ensure a good ground connection.

Referring to FIGS. 15-16, the upper shield 160
Includes an upper plate portion 162 having a front hook portion 164. The hook portion 164 has a hook portion slot 166. Upper plate part 16
2 has a cable opening 170 and extends rearward. The upper shield 160 cooperates with the lower shield 130 to become an outer shield having a shield characteristic.

According to FIGS. 17 to 19, the stuffer cap
180 includes a number of barrel receivers 182 on its lower surface that slidably receive wire barrel 34 (see FIG. 1) from above, and includes posts 184 positioned to terminate insulated wires in slots 35. The stuffer cap further includes a cable receiving opening 186 in communication with the passages 188a-188d formed by the unitary plate members 190a-190c. The central support wall 192 is located below the stuffer cap 180 and in FIG.
Stuffer cap slot that extends to the upper part like
Including 194. According to Figure 18, the staffer cap slot
194 includes an extension 196.

Referring to FIGS. 20-22, the first crosstalk shield member 200 includes a first plate portion 202 having laterally extending lateral side tabs 204 and an oppositely extending lower tab, as best seen in FIG. It has a part 206. The elastic contact member is formed by bending the second plate portion 208. The second plate portion 208 is an elastic contact piece extending outwardly and including a contact portion 212.
Including 210. The shield member 200 is formed to be received within the stuffer cap slot 194. At this time, the elastic contact piece 210 extends over the cable receiving opening 186.

A second crosstalk shield 220 is shown in FIGS. It has a first locking tab 224 at the front end and a second locking tab 22 at an intermediate longitudinal position.
A substantially elongated plate portion 222 having 6 occupies the main portion. The notch portion 228 is located on the tab portion 226. The second crosstalk shield 220 is formed to be received in the groove 50 of the housing 4. The second crosstalk shield 220 functions as a crosstalk preventing shield member in cooperation with the first crosstalk shield.

29-30, the locking member 250 comprises a frame member 252 having integrally extending legs 254. The leg has a locking shoulder 256 adjacent its end and a detent 257 in an intermediate position with a corner lock 258 providing a locking portion with the locking plate 260.

The electrical connector of the present invention is assembled as follows using the elements described above. Terminal 30 is housing 4
Slidably received in each slot 58 of the lock lance and moved forward until the locking lance locks and locks behind the locking shoulder. The second crosstalk shield 220 is then slidably moved completely back into the groove 50 as shown in FIG.
With the electrical terminals 30 and the second crosstalk shield 220 in place, the shunt bar 47 is located in a suitable longitudinal slot 44 as shown in FIGS. 1-26 and extends downward to a lower slot position 45. The shunt bar 47 can be laterally crossed by passing through the lateral slot in the second crosstalk shield 220.

Shielded cables remove insulating material and release individual twisted pair conductors with twists to separate them,
A twisted pair is prepared by placing the twisted pair in each opening 188a-188c of the stuffer cap 180 and extending the free end of each wire to the corresponding barrel receiver 182. The stuffer cap 180 with the first crosstalk shield 200 assembled therein may be disposed within the housing 4 with the side lugs 197 engaging the longitudinal grooves 23 in the housing side wall 18. This causes the inner conductor of the insulated wire to make electrical contact with the slot 35 in the wire barrel 34. Staffer Cap 18
Move 0 down to the first crosstalk shield 200
Move to position 26. The first and second crosstalk shields 200 and 220 are laterally offset so as to avoid edge collision. However, to further prevent contact at the ends of the two shields, the first crosstalk shield 20
0 has a side leg 206 located at the lead end. The side leg portion 206 moves the first plate portion 202 to the position shown in FIG. 26 opposite to the second crosstalk shield 220 when an end collision is likely to occur.

The upper and lower shields 160 and 130 are placed on top of one another on the housing 4, the lower part having a bottom plate part 132 facing the lower part 46 and the contact tongue 136 placed on the lower surface 48. To be done. As a result, as shown in FIG. 26, the grounding contact member 140 of the lower shield 130 is disposed in the window 60 at the lower part of the inner housing and elastically contacts the bottom end 223 of the second crosstalk shield 220. The upper shield 160 is placed on the inner housing 4 and the front hook portion 164 is fitted to the front hood member 24.
Fit the central rib 28 with six individual contact tongues 167. The rear shield 168 of the upper shield member 160 is the lower shield member 13
It is placed after the second tab member 155 of 0 (see FIG. 13) to the completely locked position, and the upper side plate portion 162 has the third tab member 15
Placed under 6. Side plate 169 in fully locked position
Is in contact with the inside of the side wall portion 134 and engages with the rear end concave portion 19 of the housing 4 to shield the gap formed by the latch. Elastic contact part
210 preferably extends above the top of the staffer cap. Therefore, the upper shield 160 is moved downward to the fully locked position, and the upper plate portion 162 is brought into ground contact with the contact portion 212 on the first crosstalk shield 200. According to FIG. 26, the contact portion 36 of the electric terminal 30 substantially prevents crosstalk in the length direction, and also in the wire barrel 34, signal crosstalk is similarly prevented by the first crosstalk shield 200.

In the assembly, the shield blade of the shielded cable is crimped by the crimping arm 154 on the lower shield. In this pressure-bonded state, the first and second crosstalk shields 200 and 220 are used as shield blades. The shielded subassembly described above can be inserted into the outer housing 70 (see FIGS. 5 and 6) from the rear until the inner housing 4 contacts the front lip 85, with the latch 142 in each opening 84. Engaged. The strain relief 110 (see FIGS. 27 and 28) is then assembled around the shielded cable and the frame support member 95.
Latch 106 (see FIGS. 7 and 9) has been moved to a fully locked position to engage window 83 of outer housing 70 to provide strain relief for the cable and to support the shielded subassembly of inner housing 4. To do.

Rear plate 95 for strain relief 110
The engagement relationship with is shown in FIGS. 27 and 28. Locking member
The 250 (see Figures 29 and 30) is assembled in the configuration shown in Figure 31. At this time, the corner lock 258 is 75 at the rear end.
(See FIG. 5) to prevent the latch plates 74 and 76 from moving. The leg portion 254 slides and the latch plates 74 and 76
Will be accepted during In the locked position, the latch shoulder engages web 73 (see FIG. 5). At this position, the latch plates 74 and 76 are fixed in the vertical direction.

Another embodiment of the lower shield 330 is shown in FIGS. The lower shield 330 is a shield tongue portion 33 extending forward from the base plate portion 332 through the intermediate wall 338.
The substrate portion 332 having a side wall 334 formed at a right angle to 6 and extending upward is shaken. A central tongue 340 extending between the two tongues 336 has a bent plate 320 that forms a shield member similar to member 220 of FIG. The shield member 320 further includes a notch 328 for lateral placement of the shunt bar 47 previously shown in FIG. The lower shield 330 further includes tabs 342, 344, 346, 350, 356, 355, the functions and operations of which are as described above. The lower shield member 330 further includes an integral crimping member 352 having two upright crimping arms 354, best shown in FIGS.

35 to 37, the upper shield 360 includes an upper plate portion 362 having a front hook portion 364. The notch 366 is formed on the front post portion 28 of the inner housing 4 as described above.
In the position. The point where the contact portion 367 is arranged off the lower surface 26 (see FIG. 2) is as described for the upper shield 160. The shield 360 further includes a cable opening 370 for receiving the shielded cable and a rear plate portion 368 having an integral shield arm extending rearwardly from the cable opening 370. Arm 371 is configured to move downwardly between two arms 354 to terminate the cable in close proximity to the shielded cable being received. Arm 354 is crimped around arm 371 with locking ring 400,
This ensures a secure contact between the arms 354, 371 and the shielded cable that is terminated.

The shield members 330, 360 are assembled to the inner housing 404 (FIG. 38) in a manner similar to that described above. The only difference is the shield plate 320 with the shield 330 integrated.
With slots 450 in the bottom 448 of the inner housing 404
Placed inside, which places the integral shield member 320 in the same position as shown in FIG.

Another embodiment of the upper shield 460 is shown in FIGS. 39-43. The upper shield 460 has a front hook portion 464 and a rear plate portion 468. The rear plate 468 includes a side flap 469 extending forward and an integral shroud 470 surrounding the opening of the shielded cable. The integral grounding arm 471 extends from the rear plate portion 468 and is crimp-engaged with the shield blade of the shielded cable as described above.

In this embodiment of the upper shield 460, the integral crosstalk shield 480 extends integrally from the side end 484 and is in contact with the upper plate-shaped portion 462 and the strap portion 48 overlapped.
Offered by 2. This point is shown in the side view 39 and FIG.
It is best shown in the bottom view of 43. The upper shield member 460 shown in FIGS. 39-43 can be used with the other lower shield members shown in the specification and the stuffer cap 180 shown in FIGS. 17-19, and then an integral crosstalk shield 480. Is acceptable within the stuffer cap slot 194 of the stuffer cap 180.

FIG. 44 shows an embodiment of the electrical connector according to the present invention. Electrical connector 500 is described in U.S. Pat. No. 4,44.
A connector having many elements outlined in US Pat. No. 9,778 and US Reissue Pat. No. 32,760. Many of the elements shown in the specifications of these patents and reissued patents can be used in the present invention. The electrical connector 500 has a hermaphroditic structure,
The same connector is formed so as to be fitted in the opposite direction.

Further in accordance with FIG. 45, the electrical connector 500 includes an upper cover 512 and a lower cover 514 (outer housing). The upper cover 512 and the lower cover 514 are formed to fit together. The upper cover 512 and lower cover 514, fitted as shown in FIG. 44, form a housing assembly. Upper cover 512 and lower cover 514 are preferably formed of an insulating material such as insulating plastic. The electrical connector 500 further includes an upper cable in pressure contact with the upper shield 516 and a lower cable in pressure contact with the lower shield 518, each located inside the assembled housing of the electrical connector 500. The electrical connector 500 further includes a terminal housing 520 (inner housing) and a stuffer cap 522. The central shield 524 and the cable 526 are attached to the stuffer cap 522 as shown.
Connected with. Cable 526 is a suitable type of cable for electrical connector 500. Cable 526 has two conductor pairs 528 and 530, each pair of conductors twisted within the cable in a manner well known to those skilled in the art. The two conductor pairs 528 and 530 are located within the shield blade 532 and are contained within the jacket 534 of the cable 526. Cable 526 further includes bushing 536 and electrical connector 50.
Allows crimping of cable and shield within 0.

The terminal housing 520 is preferably molded of a plastic material and includes a terminal receiving member 540 extending between a mating surface on the front of the housing and a wire connection surface on the rear of the housing. The terminal receiving member 540 includes a number of grooves 542 that extend forwardly along itself to form a terminal-supporting rib 544 in a carved shape. The side walls 546 and 548 are terminal receiving members 54.
Connected by a lateral hood 550 near the front end of the terminal housing which overhangs the opposite side of 0. Each side wall 54
6 and 548 are vertical ribs 552 arranged substantially vertically inside, respectively.
And 554, and further includes a rear side wall extending substantially vertically outside. Removable wire opening blinds 614, 616 are formed on the rear surface of the terminal housing 520. These upper cover 512 and lower cover 514 have side recesses 615a,
615b, 617a and 617b (6171b is not shown) are formed so as to be assembled.

A number of electrical terminals 560 include a terminal housing 520.
Supported on the terminal receiving member 540. These electrical terminals
Each of the 560 is a body 654 that mates with a reverse bent terminal portion 562.
including. The reverse bent terminal portion is arranged so as to extend substantially at the front fitting end of the terminal receiving member 540 (see FIG. 48). Each electrical terminal 56
The O further includes a barrel terminal for wire receiving of the construction generally described in U.S. Pat. No. 3,860,318. This structure can be applied to other embodiments of the present invention.

The upper and lower shields 516 and 518 are each preferably formed from a piece of metal sheet. The upper shield 516 includes a body 570 and a side flange 57 extending downward.
Includes 2 and 574. The upper shield 516 further includes a forward bifurcated contact 580. The bifurcated contact portion 580 is a pair of contact tabs 582 having a contact surface 584 that is bent upward at the front end.
Have. Each of the side flanges 572 and 574 has a semicircular cable receiving recess 576. Cable receiving recess
Reference numeral 576 enables connection of the cable from the side as shown in FIG. This is according to the prior art and allows the appropriate wire aperture plate 614, 616 to be removed and the cable 526 assembled to the cover 512, 514.

Further, as apparent from the drawings, the electrical connector
The 500 may house cables that extend axially from itself. This point is outlined in FIG. A rear cover 619 having blind inserts 621 of approximately the same size is arranged in the recesses 623a, 623b of the upper and lower covers 512, 514 when axial cable assembly is not performed. Blade contact tabs 57 to accommodate such axial connections.
8 extends from the rear of the shield body 570.

The lower shield 518 has side flanges 592 and 594 extending generally upward and back flanges 596 and 598 also extending substantially upward. Side cable openings 600 and 602 are formed on each side between side flange 594 and back flange 598 on one side and between side flange 592 and back flange 596 on the other side. Further, a rear cable opening is formed between the rear flanges 596 and 598. It is noted that each side flange 592, 594 and each back flange 596, 598 includes an inwardly extending flange that provides mechanical and electrical contact with the cable blade 532.

Each side and back flange 592, 594, 596 and 598 of the lower shield 518 is a detent latch 60 respectively.
6, 608, 610 and 612, each of which is the upper shield 516
Formed to engage the latch receiving grooves in the flanges 572 and 574 of the. This structure ensures mechanical and electrical connection between the shields when the electrical connector 500 is assembled.

The stuffer cap 522 is preferably formed substantially of a non-conductive, hard, flexible plastic material and includes a number of internal compartment walls defining wire receiving passages extending between the gripping flanges 620. U.S. Pat.No. 4,186,
Included in the stuffer cap 522 are a number of barrel terminal receptacles having wire-receptive protrusions of the type schematically shown at 984. This structure can be applied to other embodiments of the present invention. The stuffer cap 522 cooperates with the wire barrel 565 to electrically terminate the conductor.

According to FIGS. 46 and 47, the stuffer cap 522 is a stuffer cap slot located approximately in the center.
Including 622. The stuffer cap slot 622 is an area between the barrel terminal receptacles in the stuffer cap 522.
Approximately located near 624 and 626. However, these barrel terminal receptacles are insulated from the stuffer cap slot 622 through the body of the stuffer cap 522. The central shield 524 is arranged to engage through the stuffer cap 522 and the stuffer cap slot 622 when the electrical connector 500 is assembled. The center shield 524 is formed of a conductive material, preferably sheet metal. The central shield 524 includes a front portion 628.
The front part 628 has a larger vertical center part 630 and notch
Separated by 632 Notches 632 are formed to engage back web 634 through stuffer cap slots 622 in stuffer cap 522. The front portion 628 of the central shield 524 is formed to be about the size of the vertical length of the stuffer cap 522 when the notch 632 engages the web 634. A number of generally elastic tabs 636 extend substantially over the center of the central shield 524. The central shield 524 including the tab 636 has a tab 636 mechanically and electrically contacting the bottom side of the upper shield 516 when the electrical connector 500 is assembled, and the bottom surface of the central portion 630 has a terminal receiving member 540.
And extends near the lower shield 518.

In the preferred embodiment of the central shield 524,
The central shield includes a port portion 638 on the back surface. This part extends from the central part 630 and separates the notches 640 and 642 from above and below.
Is arranged with elasticity. The elastic arrangement of the fender 638 with respect to the central shield allows the flute to be flexed and of various orientations with respect to the termination of the cable 526 in the electrical connector 500. This allows the electrical connector
It is possible to maintain the central shield 524 between the signal carrying conductors 528, 530 regardless of the direction in which the cable 526 is terminated within the 500. (See Figure 44 for lateral orientation and Figure 45 for axial orientation).

As shown in FIG. 45, twisted conductor pairs 528 and 530 provide extension termination beyond the blade sheath 532. Central shield 524 extends between the pair of conductors and provides a ground potential shield therebetween to reduce crosstalk between the conductors. Upper shield 516 on tab 636
The mating with provides a constant ground potential shield for the flade sheath 532, which is not only the shield on the outer surface of the electrical connector, such as that formed by the upper shield 516 and the lower shield 518, but also the upper shield 516 and the central shield. The ground potential shield by connecting to 524 substantially surrounds each conductor pair. Central shield 52
The extension of the front portion 128 of the four beyond the stuffer cap 522 maintains the surrounding of the pair of conductors that are fully terminated to the wire barrel of each terminal.

FIG. 48 shows the terminal housing 520, the lower shield 518 and the lower cover 514. The electrical contact terminal ends 562 each include a forwardly extending base 654. Base 654
Is an elastic contact tongue that is bent backwards near the front end 656
Form 658. According to the drawing, the terminal housing 520 has a central slot 65 extending between the bases 654 of the terminal end contacts 562.
Including 0. The central slot 650 forms an air gap between the terminals connected to each conductor and suppresses mutual influences due to dielectric polarization between the terminals. This further prevents signal crosstalk between the contacts. The central slot 650 can be formed vertically rearward with a suitable distance to match the strength of the material used for the terminal housing 520 and the strength of the electrical connector. Preferably, the central slot 650 is located rearward of the front of the central shield 524.

Various modifications may be considered without departing from the spirit of the invention and the scope of the appended claims. The configurations or operations of the disclosed embodiments are illustrative and do not limit the present invention.

[0044]

According to the present invention, it is possible to obtain a shielded electrical connector assembly which is compact but has excellent shield characteristics.
The invention also achieves a shield in the vicinity of the conductors and electrical terminals in the cable. As a result, the entire electrical connector is shielded, and crosstalk between conductors in this portion is suppressed, so that more reliable data transfer between devices becomes possible.

[Brief description of drawings]

FIG. 1 is a perspective view of an inner housing. One electrical terminal is shown remote from the housing.

FIG. 2 is a perspective view of the inner housing from below.

3 is a front view of the inner housing of FIGS. 1 and 2. FIG.

FIG. 4 is a bottom view of the inner housing shown in FIGS. 1 to 3.

5 is a perspective view of an outer housing for use with the inner housing shown in FIGS. 1-4. FIG.

6 is a sectional view of a portion 6-6 in FIG.

7 and 8 are perspective views of a back plate of the present invention.

9 is a side view of the back plate shown in FIGS. 7 and 8. FIG.

10 and 11 are perspective views of a strain relief of a cable used with the back plate of FIGS. 7 and 8.

FIG. 12 is a plan view of the strain relief of FIG.

FIG. 13 is a plan view of the lower shield.

FIG. 14 is a side view of the lower shield of FIG.

FIG. 15 is a side view of the upper shield.

16 is a front view of the upper shield of FIG.

17 and 18 are perspective views of the stuffer cap of the present invention.

FIG. 19 is a bottom view of the stuffer cap of FIGS. 17 and 18.

FIG. 20 is a side view of the first crosstalk shield used in combination with the stuffer cap shown in FIGS. 17 to 19;

21 is a plan view of the first crosstalk shield of FIG. 20. FIG.

22 is a rear view of the first crosstalk shield of FIG. 20. FIG.

23 is a side view of the second crosstalk shield plate disposed in the inner housing of FIGS. 1 to 4. FIG.

FIG. 24 is a plan view of the second crosstalk shield of FIG. 23.

25 is a rear view of the second crosstalk shield of FIG. 23. FIG.

FIG. 26 is a cross-sectional view showing an assembled state of the upper shield and the lower shield, and the first and second cross stroke shields.

FIG. 27 is a perspective view showing the assembly of the back plate and the strain relief.

28 is a perspective view similar to FIG. 27 and showing a state in which the assembly is completed.

29 and 30 are perspective views of a locking member.

FIG. 31 is a rear perspective view of the electrical connector assembly.

FIG. 32 is a plan view showing another embodiment of the lower shield used in the present invention.

33 is a side view of the lower shield of FIG. 32.

34 is a rear view of the lower shield of FIG. 32. FIG.

35 is a rear view of the upper shield used with the lower shield of FIG. 32. FIG.

36 is a side view of the upper shield of FIG. 35.

FIG. 37 is a front view of the upper shield of FIG. 35.

38 is a perspective view from below of an inner housing using the shield member of FIGS. 32 to 37. FIG.

FIG. 39 is a side view showing another embodiment of the upper shield used in the present invention.

40 is a front view of the upper shield of FIG. 39. FIG.

41 is a plan view of the upper shield of FIG. 39. FIG.

42 is a rear view of the upper shield of FIG. 39. FIG.

43 is a bottom view of the upper shield of FIG. 39. FIG.

FIG. 44 is a perspective view showing an example of the electrical connector of the present invention.

45 is an exploded perspective view of the electric connector of FIG. 44.

46 is a perspective view showing the positional relationship between the stuffer cap and the central shield member in the electric connector of FIG. 45.

47 is a sectional view taken along the line 47-47 in FIG. 46.

48 is a front perspective view of the electrical connector of FIG. 44 partially disassembled.

[Explanation of symbols]

4,520 Inner housing 30,560 Electric terminal 36 Contact part 35 Cable conductor receiving part (slot) 70, 512, 514 Outer housing 130, 160, 330, 360, 460, 516, 518
External shield 200, 220, 524 Crosstalk prevention shield member

Front Page Continuation (31) Priority Claim Number 9303502.0 (32) Priority Date February 22, 1993 (33) Priority Claim Country United Kingdom (GB) (72) Inventor Julian Ferry, North Carolina, USA 27284 Kernersville Raven Ridge Drive 443 (72) Inventor Brian Eric Kilbay England HP5 2BZ Buckinghamshire Chesham Little Spring 9 (72) Inventor Bruce Shiny Cool Bear United Kingdom AL3 4NB Heartford Shire East Burnett Woodfield Drive 103 (72) Invention Person Richard Frank Gandy United Kingdom AL3 4NB Heartford Shire St Albans Low Rat Drive 2

Claims (1)

[Claims] 1. An electric terminal having a cable conductor receiving portion and a contact portion with a device side, an inner housing for supporting the electric terminal, an outer shield surrounding the inner housing, and an outer shield arranged outside the outer shield. A shield-type electric connector assembly having an outer housing, wherein a shield member for preventing crosstalk is provided between conductor receiving portions of at least one pair of adjacent electric terminals, and the shield member is connected to the outer shield. Type electrical connector assembly.