Source: http://www.docstoc.com/docs/57345699/Electrical-Plug-Connector---Patent-7549891
Timestamp: 2013-12-22 08:40:34
Document Index: 453540636

Matched Legal Cases: ['arts 26', 'arts 26', 'arts 26', 'arts 26', 'arts 26', 'arts 26', 'art 31', 'arts 26', 'arts 26']

Electrical Plug Connector - Patent 7549891
United States Patent: 7549891
7,549,891
An electrical connector includes a connector housing and a printed circuit
board with two sets of contact elements. The first set of contact
elements is located on the front face of the printed circuit board and
protrudes into an opening in the plug connector housing. The second set
of contact elements is located on the rear face of the printed circuit
board. The contact elements of the second set are configured to form
insulation-displacement contacts. The plug connector also includes a
cable manager which has a continuous opening and is configured on the
front face with guides for cores or wires which are intended to make
contact with the insulation-displacement contacts. The guides in the
region of the insulation-displacement contacts are configured with
recessed receiving elements or holders for the insulation-displacement
contacts, and the cable manager can be latched to the plug connector
Mossner; Frank (Berlin, DE), Nad; Ferenc (Berlin, DE), Gwiazdowski; Michael (Berlin, DE)
11/890,538
11386267Mar., 20067270563
11223864Sep., 20057025621
103444916953362
PCT/EP01/08651Jul., 2001
100 40 733
100 51 097
439/404,405,395,460,469,470,472
Tenham et al.
Stroede et al.
6077122
Elkhatib et al.
6478620
2005/0020124
31 50 568
0 445 376
297 03 983
299 15 553
This application is a continuation of application Serial No. 11/386,267,
filed Mar. 21, 2006, now U.S. Patent No. 7,270,563, which is a
continuation of application Ser. No. 11/223,864, filed Sep. 9, 2005, now
U.S. Patent No. 7,025,621, which is a divisional of application Ser. No.
10/344,491, filed Feb. 12, 2003, now U.S. Pat No. 6,953,362, which
application is a 371 of PCT/EP01/08651, filed Jul. 26, 2001; which
application claims priority to German application 100 40 733.1, filed
Aug. 17, 2000, and German application 100 51 097.3, filed Oct. 14, 2000;
1.  An electrical plug connector comprising: a housing having a front portion and a rear portion;  the front portion defining a socket configured to receive a plug;  a plurality of plug
contact elements projecting into the socket in the front portion of the housing to contact the plug when the plug is received in the socket;  a plurality of insulation-displacement contacts positioned within rear openings in the rear portion of the
housing;  a plurality of conductors, each conductor electrically connecting one of the plug contact elements to one of the insulation-displacement contacts;  and a cable manager that is latchable to the housing, the cable manager having a through-opening
extending between a front face and a rear face of the cable manager, the through-opening being divided into a plurality of segments configured to separate a plurality of wire cores into a plurality of pairs, the cable manager further including guides
formed on the front face of the cable manager, the guides being configured to receive the wire cores which are intended to make contact with the insulation-displacement contacts, the guides being located in a region of the insulation-displacement
contacts defining recessed holders for the insulation-displacement contacts.
2.  The electrical plug connector of claim 1, wherein the segments have different shapes.
3.  The electrical plug connector of claim 1, wherein the segments have different sizes.
4.  The electrical plug connector of claim 1, wherein the conductors are arranged on a printed circuit board.
5.  The electrical plug connector of claim 1, further including a shield positioned on a side of the housing.
6.  The electrical plug connector of claim 1, wherein each segment defines a channel.
7.  The electrical plug connector of claim 6, wherein each channel extends from a front face to the rear face of the cable manager.
8.  The electrical plug connector of claim 1, wherein the through-opening is divided into four segments.
9.  The electrical plug connector of claim 8, wherein a guide cross is positioned within the through-opening to divide the through-opening into the four segments.
10.  The electrical plug connector of claim 1, wherein each of the guides includes inward projections to retain a wire core within the guide.
11.  The electrical plug connector of claim 10, wherein the inward projections are spherical-shaped.
12.  An electrical plug connector comprising: a plug connector housing;  a plurality of plug contact elements projecting into a plug socket in the plug connector housing;  a plurality of insulation-displacement contacts positioned within rear
openings in the plug connector housing;  a plurality of conductors, each conductor electrically connecting one of the plug contact elements to one of the insulation-displacement contacts;  a cable manager having a through-opening extending between a
front face and a rear face of the cable manager, the cable manager further including guides formed on the front face of the cable manager, the guides being configured to receive wire cores that are intended to make contact with the
insulation-displacement contacts, the guides being located in a region of the insulation-displacement contacts that defines recessed holders for the insulation-displacement contacts;  a guide cross positioned within the through-opening of the cable
manager, the guide cross dividing the through-opening into a plurality of segments;  and a hold down device having openings for receiving the insulation displacement contacts, the hold down device being connected to the cable manager and to the plug
13.  The electrical plug connector of claim 12, further including a shield positioned on a side of the housing.
14.  The electrical plug connector of claim 12, wherein the guide cross divides the through-opening into four segments.
15.  The electrical plug connector of claim 12, wherein the conductors are arranged on a printed circuit board.
16.  The electrical plug connector of claim 12, wherein each segment defines a channel.
17.  The electrical plug connector of claim 16, wherein each channel extends from the front face to the rear face of the cable manager.
18.  An electrical plug connector comprising: a plug connector housing defining a front opening and a plurality of rear openings;  a plurality of contact elements projecting into the front opening in the housing;  a plurality of
insulation-displacement contacts positioned within the rear openings in the housing, each of the contact elements being electrically connected to one of the plurality of insulation-displacement contacts;  and a cable manager latchable to the housing, the
cable manager having a through-opening extending between a front face and a rear face of the cable manager, the opening being divided into a plurality of segments configured to separate a plurality of wire cores into a plurality of pairs, the cable
manager further including guides formed on the front face of the cable manager, the guides being configured to receive the wire cores, which are intended to make contact with the insulation-displacement contacts, the guides being located adjacent the
insulation-displacement contacts and being formed with recessed holders for the insulation-displacement contacts;  wherein the through-opening of the cable manager includes a guide cross dividing the through-opening into segments configured to separate
the wire cores into pairs.
19.  The electrical plug connector of claim 18, further including a shield positioned on a side of the housing.
20.  The electrical plug connector of claim 18, wherein each of the guides includes inward projections to retain a wire core within the guide.
21.  The electrical plug connector of claim 20, wherein the inward projections are spherical-shaped.  Description
EP 0 445 376 131 discloses a plug connector for connecting a plug to electrically insulated conductors, having a housing which has a cavity to accommodate the plug, and with a first and a second set of connecting elements being provided.  Each
connecting element in the first set has an insulation-displacement contact for holding an insulated conductor and for making a contact connection with its core, and has a foot section.  Each connecting element in the second set has a contact strip and a
contact tongue, with each of the connecting elements in the second set being electrically connected via the contact tongue to the foot section of the connecting elements in the first set and extending from the first set to the cavity in order thus to
make an electrical connection to the contacts fitted to the plug, and with the first and the second set of connecting elements being fixed in their position in the housing of the plug connector by guide means.  The connection between the conductors and
the insulation-displacement contacts is in this case made by means of known connection tools.  In the process, the individual conductors or cores must be routed to the insulation-displacement contact and must be pressed into the insulation-displacement
contact by means of the connection tool.  One disadvantage of the known plug connector is its wide tolerances in its transmission response, which lead to major problems at high transmission rates.
The invention is thus based on the technical problem of reducing the tolerances in the transmission response of a plug connection.  A further technical problem is the provision of a method for assembly of an electrical plug connector and of a
tool for assembly of the plug connector, and for the connection of the cores of the electrical plug connector.
To this end, the plug connector comprises a cable manager which has a through-opening and is formed on the front face with guides for cores which are intended to make contact with the insulation-displacement contacts, in which case the guides in
the region of the insulation-displacement contacts are formed with recessed holders for the insulation-displacement contacts, and the cable manager can be latched to the plug connector housing.  This results in a number of major advantages in comparison
to the prior art, which restrict the transmission response tolerances.  The guides fix the length of the cores with which contact is to be made, in a defined manner.  For this purpose, the respective core is passed through the openings and is inserted
into the guides.  Projecting parts of the core are then cut off at the edge of the cable manager, so that the length of the cores is the same in each plug connector.  Furthermore, the guides mean that the cores can each all be located in a reproducible
position with respect to one another.  These two facts result in a fixed value for the crosstalk.  A further advantage is that, once the cores have been fitted in the cable manager, contact between them and the insulation-displacement contacts can be
made simultaneously, or virtually simultaneously.
To this end, the rear face of the cable manager is formed with an incline on one side.  The cable manager and plug connector housing can be latched to one another without exerting any relatively high force, by means of an essentially, U-shaped
tool like a bracket, on whose lower limb face, parallel-running guides are arranged which point inward, run at right angles to the rear wall of the tool, and are designed with obliquely running guide edges in the upper region on the inside of the limbs.
In this case, the inclines on the cable manager and on the tool are aligned to be complementary to one another, so that the process of pushing the tool on leads to a travel movement, by means of which the cable manager is moved in the direction of the
plug connector housing, so that the insulation-displacement contacts cut through the insulation on the cores and enter the holder within the guides.  The transformation ratio from the sliding movement to the travel movement can in this case be varied via
the gradient of the inclines.
A guide cross is preferably arranged in the opening in the cable manager, so that the cores are also guided in a defined manner within the openings.  In the case of known RJ-45 plug connections, the associated core pairs are in this case each
guided in one segment of the guide cross.
In a further preferred embodiment, a hold-down device is arranged between the cable manager and the printed circuit board and allows the printed circuit board to be fixed with respect to the plug connector housing.  Tensile forces on the cable,
which would otherwise act on the printed circuit board, are thus absorbed.
In a further preferred embodiment, the guides are at offset levels in either direction with respect to one another, so that some of the cores make contact with one another at different times.  This also results in the necessary contact forces
being distributed better, so that the user requires less force for assembly and connection.
To this end, the tool or the first part of the cable grip comprises two jaw parts which are located together and whose joint flexing can be limited by means of a spring which engages around the jaw parts and can be inserted at different points on
the first part.  A force-fitting connection to the cable can be produced by means of a third part, which can be latched to the first part and/or to the spring.  In addition to the force-fitting connection, this multipart cable grip also allows cables of
different diameter to be centered, which in turn has a positive effect on the tolerances relating to the transmission response.
In the case of cables with a shield, the cable grip can, furthermore, be used as a universal shield contact.  To this end, the first and the third parts of the cable grip are either in the form of a diecast zinc part or a metallized plastic part,
which is or can be connected to a ground plate in the plug connector housing.
Referring to the drawings in particular, FIG. 1 shows an exploded illustration of a plug connector 1.  The plug connector 1 comprises a plug connector housing 2, a printed circuit board 3, a hold-down device 4 and a cable manager 5.  The plug
connector housing 2 in the illustrated example is in the form of a socket housing with various latching and insertion means.  The plug connector housing 2 is designed with a shielding plate 6 on the side surfaces.  The printed circuit board 3 is fitted
with a first set of contacts 7 on its front face and with a second set of insulation-displacement contacts 8 on its rear face.  One contact 7 in the first set is in each case connected to one contact 8 in the second set.  The printed circuit board 3 is
then inserted into the plug connector housing 2.  In the process, cylindrical pins 9 on the plug connector housing 2 pass through holes in the printed circuit board 3, so that the plug connector housing 2 and printed circuit board 3 can be adjusted and
fixed with respect to one another.  The contents 7 in the first set, which are in the form of RF contacts, then project into an opening which is accessible from the front face of the plug connector housing.  The hold-down device 4 is then pushed over the
contacts 8 in the second set, and is latched to the plug connector housing 2.  For this purpose, the hold-down device 4 is designed with latching tabs 10 on the end face, and has through-openings 11 for the insulation-displacement contacts 8.
Furthermore, the hold-down device 4 is designed with two latching hooks 12, which are used for latching to the cable manager 5.  Before describing this assembly process, the cable manager 5 will first of all be explained in more detail with reference to
The cable manager 5 is essentially cuboid and has a central opening 13 around which a cylindrical attachment 14 is arranged.  The opening 13 extends through from the rear face 15 to the front face 16.  A guide cross 17 is arranged in the opening
13, and subdivides the opening 13 into four segments.  Half of the rear face 15 is in the form of an incline 18.  The cable manager 5 is designed with guides 19 on the front face 16, into which the cores with which contact is to be made can be inserted.
Each guide 19 is designed with a recessed holder 20.  The holders 20 are in this case arranged at the same positions as the insulation-displacement contacts 8 in FIG. 1.  The guides 19 run either radially from the opening 13 to the edges of the cable
manager 5 (as illustrated in FIG. 3), or each run parallel to one another (as illustrated in FIG. 4).  In this case, if there are eight guides 19, as are required, by way of example, for a known RJ-45 plug connection, two guides 19 of a core pair are
allocated to each quadrant.  As can be seen from FIGS. 3 and 4, the holders 20, and thus the insulation-displacement contacts 8 of the various pairs, are relatively far away from one another, so that the crosstalk is reduced.  In preparation for the
actual contact-making process, the cores are passed in pairs from the rear face 15 to the front face 16 in one segment of the guide cross 17, and are pressed into the associated guides 19 on the front face 16.  In this case, colored markings can be used
both on the rear face 15 and on the front face 16, in order to associate the core pairs with correct segments, and the cores with the correct guides 19.  Once the cores have bee pressed into the guides 19, they are cut off along the side edges.  In
principle, the cable manager 5 together with the plug connector housing 2 and the hold-down device 4 could now be latched to one another by finger pressure, although this would require a not inconsiderable amount of force to be used.  A tool 21 is thus
preferably used which, if required, can at the same time form a first part of a cable grip.  This tool 21 is illustrated in perspective in FIG. 5.
The tool 21 is essentially U-shaped with two side walls 22, which act as limbs.  A guide 23, which points inward, is arranged on the lower face of each of the side walls 22.  The two guides 23 run parallel and are at right angles to a rear wall
24.  A guide edge 25, which likewise points inward and runs obliquely to the rear, is arranged on the upper face of each of the side walls 22.  The guide edge 25 is in this case complementary to the incline 18 on the cable manager 5 shown in FIG. 2.  In
order to make contact, the tool 21 is then pushed onto the incline 18 on the cable manager 5, as is shown in FIG. 8, with part of the side wall 22 being cut away in the illustration.  The guide 23 in this case runs parallel along one edge on the plug
connector housing 2, so that the two inclines 18, 25 result in the cable manager 5 being pressed downward in the direction of the hold-down device 4.  In the process, the insulation-displacement contacts 8 are pressed into the holder 20, and make contact
with the cores located in the guides 19.
Furthermore, the tool 21 has two jaw parts 26 which flex jointly and are articulated in a sprung manner on a base 27 which is arranged on the upper face of the guide edges 25.  There are jaw parts 26 in the form of steps at the sides.  There are
four openings 28, which are in the form of elongated holes, at each of the two sides on the upper face of the base 27.  In the inner region, the two jaw parts 26 have pyramid-like structures 29.  This tool 21 can now be used together with a spring 30,
which acts as a locking means, and a closure element 31 as a cable clamp with a defined force fit and a defined centering for cables of different diameter.
FIG. 6 shows such a cable clamp.  As can be seen from the illustration, the two jaw parts 26 can be pressed together to different extents by virtue of the stepped design, depending on the pair of openings 28 into which the spring 30 is inserted.
In the illustrated example, the two jaw parts 26 are pressed together to the maximum extent, so that the holder formed in the region of the structures 29 has its maximum diameter.  The closure element 31 is essentially U-shaped.  Latching grooves 33,
which act as barbs and run obliquely to the rear, are arranged on the insides of the limbs 32.  The number of latching grooves 33 in this case corresponds to the number of openings 28.  Furthermore, the closure element 31 has a curved attachment 34,
likewise with pyramid-like structures 35 formed on the inside.  A cable can now be fixed in a defined, force-fitting and centered manner by means of the cable clamp.  In this case, it may be assumed that the cable clamp will be used for force-fitting
connection with cables whose diameters are 6, 7, 8 or 9 mm.  If it is intended to fix a 6 mm cable, then the spring 30 is first of all inserted into the first openings 28, so that the jaw parts 26 are pressed together to the maximum extent.  The closure
part 31 above the guide edge 25 is then pushed onto the base 27 until the rearmost latching groove 33 latches in on the spring leg of the spring 30.  This is shown without a cable in FIG. 7, with a part of the base 27 having been cut away in the region
of the openings 28 in the illustration.  The barb-like shape of the latching grooves 33 results in robust latching, with a 6 mm diameter cable held between the structures 29, 35 always being fixed with the same force fit.
For unlocking, the spring legs of the spring 30 which have been inserted into the openings 28 are pressed in the direction of the jaw parts 26, and the closure element 31 or the spring 30 is pulled out once again.  If, on the other hand, a 7 mm
cable is now intended to be fitted, then the spring 30 is inserted offset by one opening 28 to the rear.  The stepped outside of the jaw parts 26 means that they can now be pressed together to a lesser extent.  In the process, the accommodation area for
a cable is widened by 0.5 mm.  Furthermore, the closure element 31 is pushed on only as far as the last-but-one latching groove 33, with the distance between the latching grooves 33 likewise being 0.5 mm.  The increasing diameter is thus split equally
between the tool 21 and the closure element 31, so that the center point of the cable is always located at the same point, even if the cable diameters differ.  A corresponding situation applies to the increasing diameters, in that the spring 30 is offset
in a corresponding manner to the rear, and the closure element 31 in each case latches on to a latching groove 33 whose width is less.  When using shielded cables, the cable clamp can, furthermore, be used as a shield contact.  To this end, the tool 21
and the closure element 31 are designed to be electrically conductive, with electroplated plastic parts preferably being used, in which case the tool 21 is or can be electrically connected to a ground plate in the plug connector housing 2.
FIGS. 10 and 11 illustrate a third embodiment of the cable manager 5.  The rear face 15 is once again designed with a cylindrical attachment 14 and an incline 18.  In contrast to the embodiment shown in FIG. 2, the opening is not subdivided by a
guide cross into four equal segments, and the channels 37-40 which extend from the front face 15 to the rear face 16 have different shapes.  The two channels 37, 38 are each eye-shaped.  The channel 39 is in the form of a segment of an annulus, and the
channel 40 is in the form of a slot with a widened base.  Furthermore, the cable manager has eight openings 41 as a result of the injection molding technique.  As shown in the embodiment in FIG. 4, the guides 19 are each arranged parallel to one another,
with two guides each being arranged in pairs in one quadrant.  The guides 19 are each designed with a clamping rib 42 towards the side edges of the cable manager 5.  Furthermore, the guides 19 are designed to each have two spherical elements 43 at their
ends facing the channels 37-40, which spherical elements 43 are located in the region of the openings 41 and are used to hold the cores down.  A guide web 44, whose function will be explained in more detail later, is arranged between the channel 39 and
the channel 40.  The region between the channels 37-40 and the associated guides 19 is in each case rounded, with a radius.
If the cable manager 5 is inserted on both sides of a cable, then two core pairs must be interchanged on one side owing to the mirror-image symmetrical constellation and, with free wiring, this leads to the crosstalk between these pairs
increasing in an undefined manner.  The guide web 44 is used to avoid this undefined crosstalk, and will now be explained in more detail in the following text with reference to RJ-45 wiring.  An RJ-45 cable comprises eight cores, which are combined in
pairs, with the two outer cores 1, 2 and 7, 8 forming a pair.  The inner cores are combined crossed over, so that the cores 3, 6 and 4, 5 form a pair.  The mirror-image symmetrical situation at the two ends of a cable as described above in this case
means that either the two outer pairs or the two inner pairs must be interchanged at one end.  In the following text, it is assumed that the inner pairs 3, 6 and 4, 5 are intended to be interchanged.  The core pair 1, 2 is then arranged in the channel
37, the core pair 7, 8 in the channel 38, the core pair 3, 6 in the channel 39 and the core pair 4, 5 in the channel 40.  The guides 19 in the upper left-hand quadrant are then permanently assigned to the core pair 1, 2, and the guides 19 in the upper
quadrant are permanently assigned to the core pair 7, 8, independently of the side of the channel.  The core pair 3, 6, on the other hand, must, depending on the cable side, be assigned firstly to the guides 19 in the lower left-hand quadrant and
secondly to the guide 19 in the lower right-hand quadrant.  A corresponding situation applies, but in the opposite sense, to the core pair 4, 5 in the channel 40.  In this case, the guide web 44 makes it impossible for the two core pairs 4, 5 and 3, 6 to
touch.  Apart from providing detection against contact, a further function of the guide web 44 is to guide the two core pairs 4, 5 and 3, 6 as far away from one another as possible in a defined manner, in order thus to reduce the crosstalk.
Alternatively, the guide web 44 may be semicircular or V-shaped, in order to provide better guidance, with the edges of the guide web 44 in each case being rounded in order not to kink the cores.
Electrical plug connector, Mossner, et al., Frank Mossner, Ferenc Nad, Michael Gwiazdowski, Application number 11 890-538, Electrical Connectors, Electrical Plug, Electrical Connector, electrical connectors, connector plug, ELECTRICAL WIRE, Plug Connectors, Circular Connector, printed circuit board, rear portion, electrical contact
The invention relates to an electrical plug connector, a cable manager for an electrical plug connector, a method for assembly of an electrical plug connector, and a tool for assembly and connection of the cores of the electrical plug connector.BACKGROUND OF THE INVENTIONEP 0 445 376 131 discloses a plug connector for connecting a plug to electrically insulated conductors, having a housing which has a cavity to accommodate the plug, and with a first and a second set of connecting elements being provided. Eachconnecting element in the first set has an insulation-displacement contact for holding an insulated conductor and for making a contact connection with its core, and has a foot section. Each connecting element in the second set has a contact strip and acontact tongue, with each of the connecting elements in the second set being electrically connected via the contact tongue to the foot section of the connecting elements in the first set and extending from the first set to the cavity in order thus tomake an electrical connection to the contacts fitted to the plug, and with the first and the second set of connecting elements being fixed in their position in the housing of the plug connector by guide means. The connection between the conductors andthe insulation-displacement contacts is in this case made by means of known connection tools. In the process, the individual conductors or cores must be routed to the insulation-displacement contact and must be pressed into the insulation-displacementcontact by means of the connection tool. One disadvantage of the known plug connector is its wide tolerances in its transmission response, which lead to major problems at high transmission rates.SUMMARY OF THE INVENTIONThe invention is thus based on the technical problem of reducing the tolerances in the transmission response of a plug connection. A further technical problem is the provision of a method for assembly of an electrical plug connector and of atool for assembl
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