CA2147446A1 - Termination structure for modular telephone plug - Google Patents
Termination structure for modular telephone plugInfo
- Publication number
- CA2147446A1 CA2147446A1 CA002147446A CA2147446A CA2147446A1 CA 2147446 A1 CA2147446 A1 CA 2147446A1 CA 002147446 A CA002147446 A CA 002147446A CA 2147446 A CA2147446 A CA 2147446A CA 2147446 A1 CA2147446 A1 CA 2147446A1
- Authority
- CA
- Canada
- Prior art keywords
- housing
- sleeve
- contacts
- individual conductors
- plug according
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R11/00—Individual connecting elements providing two or more spaced connecting locations for conductive members which are, or may be, thereby interconnected, e.g. end pieces for wires or cables supported by the wire or cable and having means for facilitating electrical connection to some other wire, terminal, or conductive member, blocks of binding posts
- H01R11/01—Individual connecting elements providing two or more spaced connecting locations for conductive members which are, or may be, thereby interconnected, e.g. end pieces for wires or cables supported by the wire or cable and having means for facilitating electrical connection to some other wire, terminal, or conductive member, blocks of binding posts characterised by the form or arrangement of the conductive interconnection between the connecting locations
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R11/00—Individual connecting elements providing two or more spaced connecting locations for conductive members which are, or may be, thereby interconnected, e.g. end pieces for wires or cables supported by the wire or cable and having means for facilitating electrical connection to some other wire, terminal, or conductive member, blocks of binding posts
- H01R11/11—End pieces or tapping pieces for wires, supported by the wire and for facilitating electrical connection to some other wire, terminal or conductive member
- H01R11/28—End pieces consisting of a ferrule or sleeve
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
- H01R13/646—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00 specially adapted for high-frequency, e.g. structures providing an impedance match or phase match
- H01R13/6461—Means for preventing cross-talk
- H01R13/6463—Means for preventing cross-talk using twisted pairs of wires
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
- H01R13/648—Protective earth or shield arrangements on coupling devices, e.g. anti-static shielding
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
- H01R13/648—Protective earth or shield arrangements on coupling devices, e.g. anti-static shielding
- H01R13/658—High frequency shielding arrangements, e.g. against EMI [Electro-Magnetic Interference] or EMP [Electro-Magnetic Pulse]
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R24/00—Two-part coupling devices, or either of their cooperating parts, characterised by their overall structure
- H01R24/60—Contacts spaced along planar side wall transverse to longitudinal axis of engagement
- H01R24/62—Sliding engagements with one side only, e.g. modular jack coupling devices
- H01R24/64—Sliding engagements with one side only, e.g. modular jack coupling devices for high frequency, e.g. RJ 45
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
- H01R4/24—Connections using contact members penetrating or cutting insulation or cable strands
- H01R4/2404—Connections using contact members penetrating or cutting insulation or cable strands the contact members having teeth, prongs, pins or needles penetrating the insulation
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
- H01R4/24—Connections using contact members penetrating or cutting insulation or cable strands
- H01R4/2416—Connections using contact members penetrating or cutting insulation or cable strands the contact members having insulation-cutting edges, e.g. of tuning fork type
- H01R4/242—Connections using contact members penetrating or cutting insulation or cable strands the contact members having insulation-cutting edges, e.g. of tuning fork type the contact members being plates having a single slot
- H01R4/2425—Flat plates, e.g. multi-layered flat plates
- H01R4/2429—Flat plates, e.g. multi-layered flat plates mounted in an insulating base
- H01R4/2433—Flat plates, e.g. multi-layered flat plates mounted in an insulating base one part of the base being movable to push the cable into the slot
Landscapes
- Details Of Connecting Devices For Male And Female Coupling (AREA)
Abstract
The present invention is related to a modular telephone plug comprising an insulation housing provided with a number of contacts mounted at one end or tip of the housing, the housing having a hollow body comprising two portions. The first of the two portions is adapted to accommodate a cable comprising an outer insulation jacket enclosing a number of individual conductors. A
sleeve or liner is provided to accommodate ends of the individual conductors extending from the outer insulation jacket. The sleeve is adapted to be placed into a second portion of the housing directly underneath the contacts to facilitate successful electrical termination of the contacts with the individual conductors accommodated within the sleeve. The sleeve is provided to eliminate a Near End Cross Talk (NEXT) when data is transmitted by means of the telephone plug. The sleeve comprises a hollow insulation element having a number of inner grooves or channels adapted to accommodate each of the individual conductors. The channels are positioned parallel to each other, and are aligned with the corresponding contacts mounted in the housing. The channels are positioned in the same horizontal plan, and the sleeve further comprises slots or recesses formed directly above each of the channels. The slots are provided to facilitate successful piercing of the individual conductors by means of the corresponding contacts during electrical termination.
sleeve or liner is provided to accommodate ends of the individual conductors extending from the outer insulation jacket. The sleeve is adapted to be placed into a second portion of the housing directly underneath the contacts to facilitate successful electrical termination of the contacts with the individual conductors accommodated within the sleeve. The sleeve is provided to eliminate a Near End Cross Talk (NEXT) when data is transmitted by means of the telephone plug. The sleeve comprises a hollow insulation element having a number of inner grooves or channels adapted to accommodate each of the individual conductors. The channels are positioned parallel to each other, and are aligned with the corresponding contacts mounted in the housing. The channels are positioned in the same horizontal plan, and the sleeve further comprises slots or recesses formed directly above each of the channels. The slots are provided to facilitate successful piercing of the individual conductors by means of the corresponding contacts during electrical termination.
Description
THE IMPROVEMI~NT OF T~RMINATION STRUCTURE FOR MODULAR
TELEPHONE PLUGS
The present invention is related to telephone plugs and more particularly to term:n~tion structure of a telephone plug.
Presently known telephone plugs usually comprise an insulation housing with contacts, wherein an electrical cable is accommodated including an outer jacket and a number of individual conductors t~rrnin~ted by those contacts. However, to properly tennin~te each of said individual conductors, it is necessary to untwist those twisted pair cables; this untwisting effect is highly undesirable in view of Near End Cross talk (NEXT).
NEXT loss is a measure of signal coupling from one circuit to another within a connector, and is derived from swept frequency voltage mea~ ls on short lengths of 100Q twisted-pair 21~4~6 test leads terminated to the connector under test. A balanced input signal is applied to a disturbing pair ofthe connectors while the induced signal on the disturbed pair is measured at the near-end ofthe test leads. To determine NEXT loss requirements at a given frequency, the value for NEXT is 34 dB for a category 3 connector, 46 dB for a category 4 connector and 56 dB for category 5 connector. For category 4 and 5 connectors the ~ return loss shall be 23 dB or greater for frequencies between 1 and 20 MHz. For frequencies from 20 to 100 M[Hz, category 5 connectors shall exhibit a l..; .i.----.ll return loss of 14 dB or greater. These return loss values are chosen to limit peak reflected voltage of 7% or less up to 20 M[Hz, and 20% or less from 20 to 100 MHz.
According to the new requirements of Teleco"""~"ication Industry Association/
Electronic Industry Association ( TL9/EIA ) Teleco,.--"~"ications standards ofthe American Telecol,,l,..l..ication Industry Association (TSB 40A), the connecting hardware used to lOOQ
UTP (Un~hiPl~le~l Twisted Pair) cabhng shall be installed to provide Ill;.. i.. ll signal impairment by preserving wire pair twists as closely as possible to the point of mechanical termin~tion. The amount of untwisting in a pair as a result ofterm:n~tion to connecting hardware shall be no greater than 13 mm (0.5 in) for category 5 cables, and no greater than 25 mm (1.0 in) for category 4 cables. This requirement is imposed to minimi7e untwisting of wire pair and the separation of conductors within a pair.
An additional cable management practice that should be observed to reduce untwisting of pairs is to strip back only as much cable jacket as is required to termin~te on connecting hardware.
The object ofthe present invention is to provide a structure ofthe telephone plug which allows re~ ctinn ofthe amount of wire that is untwisted for termination, which enables to reduce or even elimin~te Near End Crosstalk (NEXT), when data is transferred at frequency of 100 MHz corresponding to category 5 connectors.
SIJM~RY OF THE INVENTION
Broadly, the present invention comprises a modular telephone plug comprising:
an in~ tion housing provided with a number of contacts mounted at one end or tip of said housmg, said housing having a hollow body comprising two portions, wherein first of said two portions is adapted to accommodate a cable comprising an outer in~ tion jacket enclosing a number of individual conductors;
a sleeve or liner provided to accommodate ends of said individual conductors e~tPn(ling from said outer in~ tion jacket;
said sleeve is adapted to be placed into a second portion of said housing directly underneath of 21~74~6 said contacts to facilitate successful electrical termin~tion of said contacts with said individual con~ ctors accommodated within said sleeve, wherein said sleeve is provided to elimin~te a near end cross talk when data is tr~n~m:~ted by means of said telephone plug.
In another embodiment ofthe present invention, said sleeve comprises a hollow in~ tion element having a number of inner grooves or channels adapted to accommodate each of said individual conductors. Said channels are positioned parallel to each other and are aligned with the corresponding contacts mounted in said housing, and said channels are positioned in the same hori7.t nt~1 plan.
In yet another embodiment, said sleeve further comprises slots or recesses formed directly above each of said channels; said slots are provided to facilitate s~lcces~fill piercing of said individual conductors by means of said corresponding contacts during electrical termin~tion. Each end of said individual conductors is completely accommodated within said sleeve, and wherein in assembled position, said sleeve is abutting or flush against the tip of said housing.
In still another embodiment, said contacts comprising a number of blade-shaped element~
mounted near the tip of said plug in vertical position, wherein upper edges of said contacts are adapted to be mated with corresponding female jack, and wherein lower edges of said contacts are adapted to be electrically terminated with the 214744~
corresponding individual conductors. Said housing further comprising a strain relieve element adapted to securely grip the outer in.~ tion jacket inside of said housing to elimin~te any undesirable shding of said cable out of said housing.
Tn yet another embodiment of the present invention, said strain reheve element is an integral part of said housing, and said housing further comprises a metal shield mounted around said housing to prevent an electro-magnetic interferences. Said housing and said sleeve are made of polycarbonate m~t~,ri~l or the like.
BT~EF DESCT~IPTION OF DT~AVVINGS
Other objects and advantages of the present invention will be apparent from the following detailed description of certain prerelled embodiments thereof and from the attached drawings of which:
Fig. 1 is a side cross-section~l view ofthe in~ tion housing ofthe present invention.
Fig. 2 is a top view ofthe in~ tion housing ofthe present invention.
Fig. 3 is a back view of the insulation housing.
Fig. 4 is a front view of in~ll~tion housing Fig 5 is a top view of a sleeve according to the present invention.
Fig.6 is a cross-sectional view of Fig.5 taken along the lines A-A.
Fig. 7 is a back view of Fig. 5 showing a number of inner grooves or channels.
21~74~6 Fig. 8 is a side cross-sectional view of the in.~ tion housing as of Fig. 1 provided with the metal shield Fig. 9. is a perspective view oftwisted pair cable.
Fig. 10 is a perspective view ofthe sleeve showing the first step of plug assembly.
Fig. 11 is a perspective view ofthe sleeve with individual conductor being placed within sleeve.
Fig. 12 is a top view of assembly before the sleeve is inserted into the housing.
Fig. 13 is a cross-sectional side view ofthe completed assembly.
DESCRIPTION OF THE PREFERRED EMBODIMENT
As shown on Figures 1 to 4 the present invention comprises an in~ tion housing 10 having a hollow body provided with two portions 20 and 22. As it shown on Fig. 1, portion 20 is large enough to accommodate cable having an outer in~ tion jacket 34, wherein second portion 22 of the housing 10 is smaller and is provided to accommodate an insulation sleeve 14 shown on Figures 5 to 7. The front portion or tip of the housing 10 is provided with a number of contacts 12 embedded into the housing 10. Each ofthose contacts 12 having a blade-shaped configuration and are mounted near the tip ofthe housing 10.. The housing 10 also comprises a latching mech~ni~m 16 provided to securely hold the plug inside the female jack and a strain reheve element 18 integrally formed in the housing 10. This strain relieve element 18 is provided to securely grip the outer in~ tinn jacket 34 within the housing 10.
As it is shown on Figures 5 to 7, in~ tion sleeve 14 is adapted to accommodate ends of individual conductors 30. The sleeve 14 comprises an elongated hollow body provided with a number of inner grooves or channels 24 positioned parallel to each other. When the sleeve 14 is inserted into the second portion 22 ofthe housing 10, those channels 24 are a]igned with the corresponding contacts 12 mounted in said housing 10. Upper surface of the sleeve 14 comprises slots or recesses 26 formed directly above each ofthe channels 24, those slots 26 are provided to facilitate successful piercing of said individual conductors 30 by said corresponding contacts 12 during electrical termin ~tion. In this case, each end of the individual conductors 30 is completely accommodated within the sleeve 14, wherein in the assembled position (see Fig. 13) the sleeve 14 is flush against the tip ofthe housing 10. Upper edges of contacts 12 are adapted to mate with the corresponding female jack, and lower edges are electrically termin~ted with the corresponding conductors 30. In the assembled position the sleeve 14 is positioned directly underneath of contacts 12 to facilitate succes~fill electrical term:n~tion ofthose contacts 12 with the individual conductors 30 accommodated within sleeve 14. Normally there are four twisted pairs of individual conductors and the sleeve 14 comprises eight corresponding grooves for those conductors 30.
Another embodiment shown of Fig. 8 is similar to Fig. 1, except that the housing 10 is additionally provided with a metal shield 32 mounted around the housing 10 and provided to prevent electro-magnetic interferences.
Preferably, the housing 10 and sleeve 14 are made of polycarbonate material.
Figures 9 to 10 illustrate assembly procedure ofthe present invention including the following steps:
stripping the outer jacket 34 of the cable 28 for a length of approximately 20 mm;
untwisting the individual conductors 30 and inserting them into the sleeve 14;
cutting the access conductor from the front ofthe sleeve;
inserting the assembled sleeve 14 and cable 28 into the housing 10, wherein the sleeve 14 should be positioned directly under the contact blades 12;
terminating the completely assembled plug by means of a hand tool, or an auto-term:n~tion tool (not shown), thus completing the operation.
The main advantage ofthe present invention is a structure ofthe telephone plug allowing to reduce the amount of wire that is untwisted for termin~tinn, which enables to reduce or elimin~te Near End Crosstalk (NEXT), when data is transferred at frequency of 100 MHz corresponding to category 5 connectors. However, this structure is not restricted to category 5 connectors only and may be used for other modifications or categories of similar connectors.
21~7 ~6 It will be obvious to those ordinary skilled in the art that many changes may be made in the details of the above-described pl~r~lled embodiment of the present invention without departing from the spirit ofthe invention. Therefore, the scope ofthe present invention should only be determined by the following claims.
TELEPHONE PLUGS
The present invention is related to telephone plugs and more particularly to term:n~tion structure of a telephone plug.
Presently known telephone plugs usually comprise an insulation housing with contacts, wherein an electrical cable is accommodated including an outer jacket and a number of individual conductors t~rrnin~ted by those contacts. However, to properly tennin~te each of said individual conductors, it is necessary to untwist those twisted pair cables; this untwisting effect is highly undesirable in view of Near End Cross talk (NEXT).
NEXT loss is a measure of signal coupling from one circuit to another within a connector, and is derived from swept frequency voltage mea~ ls on short lengths of 100Q twisted-pair 21~4~6 test leads terminated to the connector under test. A balanced input signal is applied to a disturbing pair ofthe connectors while the induced signal on the disturbed pair is measured at the near-end ofthe test leads. To determine NEXT loss requirements at a given frequency, the value for NEXT is 34 dB for a category 3 connector, 46 dB for a category 4 connector and 56 dB for category 5 connector. For category 4 and 5 connectors the ~ return loss shall be 23 dB or greater for frequencies between 1 and 20 MHz. For frequencies from 20 to 100 M[Hz, category 5 connectors shall exhibit a l..; .i.----.ll return loss of 14 dB or greater. These return loss values are chosen to limit peak reflected voltage of 7% or less up to 20 M[Hz, and 20% or less from 20 to 100 MHz.
According to the new requirements of Teleco"""~"ication Industry Association/
Electronic Industry Association ( TL9/EIA ) Teleco,.--"~"ications standards ofthe American Telecol,,l,..l..ication Industry Association (TSB 40A), the connecting hardware used to lOOQ
UTP (Un~hiPl~le~l Twisted Pair) cabhng shall be installed to provide Ill;.. i.. ll signal impairment by preserving wire pair twists as closely as possible to the point of mechanical termin~tion. The amount of untwisting in a pair as a result ofterm:n~tion to connecting hardware shall be no greater than 13 mm (0.5 in) for category 5 cables, and no greater than 25 mm (1.0 in) for category 4 cables. This requirement is imposed to minimi7e untwisting of wire pair and the separation of conductors within a pair.
An additional cable management practice that should be observed to reduce untwisting of pairs is to strip back only as much cable jacket as is required to termin~te on connecting hardware.
The object ofthe present invention is to provide a structure ofthe telephone plug which allows re~ ctinn ofthe amount of wire that is untwisted for termination, which enables to reduce or even elimin~te Near End Crosstalk (NEXT), when data is transferred at frequency of 100 MHz corresponding to category 5 connectors.
SIJM~RY OF THE INVENTION
Broadly, the present invention comprises a modular telephone plug comprising:
an in~ tion housing provided with a number of contacts mounted at one end or tip of said housmg, said housing having a hollow body comprising two portions, wherein first of said two portions is adapted to accommodate a cable comprising an outer in~ tion jacket enclosing a number of individual conductors;
a sleeve or liner provided to accommodate ends of said individual conductors e~tPn(ling from said outer in~ tion jacket;
said sleeve is adapted to be placed into a second portion of said housing directly underneath of 21~74~6 said contacts to facilitate successful electrical termin~tion of said contacts with said individual con~ ctors accommodated within said sleeve, wherein said sleeve is provided to elimin~te a near end cross talk when data is tr~n~m:~ted by means of said telephone plug.
In another embodiment ofthe present invention, said sleeve comprises a hollow in~ tion element having a number of inner grooves or channels adapted to accommodate each of said individual conductors. Said channels are positioned parallel to each other and are aligned with the corresponding contacts mounted in said housing, and said channels are positioned in the same hori7.t nt~1 plan.
In yet another embodiment, said sleeve further comprises slots or recesses formed directly above each of said channels; said slots are provided to facilitate s~lcces~fill piercing of said individual conductors by means of said corresponding contacts during electrical termin~tion. Each end of said individual conductors is completely accommodated within said sleeve, and wherein in assembled position, said sleeve is abutting or flush against the tip of said housing.
In still another embodiment, said contacts comprising a number of blade-shaped element~
mounted near the tip of said plug in vertical position, wherein upper edges of said contacts are adapted to be mated with corresponding female jack, and wherein lower edges of said contacts are adapted to be electrically terminated with the 214744~
corresponding individual conductors. Said housing further comprising a strain relieve element adapted to securely grip the outer in.~ tion jacket inside of said housing to elimin~te any undesirable shding of said cable out of said housing.
Tn yet another embodiment of the present invention, said strain reheve element is an integral part of said housing, and said housing further comprises a metal shield mounted around said housing to prevent an electro-magnetic interferences. Said housing and said sleeve are made of polycarbonate m~t~,ri~l or the like.
BT~EF DESCT~IPTION OF DT~AVVINGS
Other objects and advantages of the present invention will be apparent from the following detailed description of certain prerelled embodiments thereof and from the attached drawings of which:
Fig. 1 is a side cross-section~l view ofthe in~ tion housing ofthe present invention.
Fig. 2 is a top view ofthe in~ tion housing ofthe present invention.
Fig. 3 is a back view of the insulation housing.
Fig. 4 is a front view of in~ll~tion housing Fig 5 is a top view of a sleeve according to the present invention.
Fig.6 is a cross-sectional view of Fig.5 taken along the lines A-A.
Fig. 7 is a back view of Fig. 5 showing a number of inner grooves or channels.
21~74~6 Fig. 8 is a side cross-sectional view of the in.~ tion housing as of Fig. 1 provided with the metal shield Fig. 9. is a perspective view oftwisted pair cable.
Fig. 10 is a perspective view ofthe sleeve showing the first step of plug assembly.
Fig. 11 is a perspective view ofthe sleeve with individual conductor being placed within sleeve.
Fig. 12 is a top view of assembly before the sleeve is inserted into the housing.
Fig. 13 is a cross-sectional side view ofthe completed assembly.
DESCRIPTION OF THE PREFERRED EMBODIMENT
As shown on Figures 1 to 4 the present invention comprises an in~ tion housing 10 having a hollow body provided with two portions 20 and 22. As it shown on Fig. 1, portion 20 is large enough to accommodate cable having an outer in~ tion jacket 34, wherein second portion 22 of the housing 10 is smaller and is provided to accommodate an insulation sleeve 14 shown on Figures 5 to 7. The front portion or tip of the housing 10 is provided with a number of contacts 12 embedded into the housing 10. Each ofthose contacts 12 having a blade-shaped configuration and are mounted near the tip ofthe housing 10.. The housing 10 also comprises a latching mech~ni~m 16 provided to securely hold the plug inside the female jack and a strain reheve element 18 integrally formed in the housing 10. This strain relieve element 18 is provided to securely grip the outer in~ tinn jacket 34 within the housing 10.
As it is shown on Figures 5 to 7, in~ tion sleeve 14 is adapted to accommodate ends of individual conductors 30. The sleeve 14 comprises an elongated hollow body provided with a number of inner grooves or channels 24 positioned parallel to each other. When the sleeve 14 is inserted into the second portion 22 ofthe housing 10, those channels 24 are a]igned with the corresponding contacts 12 mounted in said housing 10. Upper surface of the sleeve 14 comprises slots or recesses 26 formed directly above each ofthe channels 24, those slots 26 are provided to facilitate successful piercing of said individual conductors 30 by said corresponding contacts 12 during electrical termin ~tion. In this case, each end of the individual conductors 30 is completely accommodated within the sleeve 14, wherein in the assembled position (see Fig. 13) the sleeve 14 is flush against the tip ofthe housing 10. Upper edges of contacts 12 are adapted to mate with the corresponding female jack, and lower edges are electrically termin~ted with the corresponding conductors 30. In the assembled position the sleeve 14 is positioned directly underneath of contacts 12 to facilitate succes~fill electrical term:n~tion ofthose contacts 12 with the individual conductors 30 accommodated within sleeve 14. Normally there are four twisted pairs of individual conductors and the sleeve 14 comprises eight corresponding grooves for those conductors 30.
Another embodiment shown of Fig. 8 is similar to Fig. 1, except that the housing 10 is additionally provided with a metal shield 32 mounted around the housing 10 and provided to prevent electro-magnetic interferences.
Preferably, the housing 10 and sleeve 14 are made of polycarbonate material.
Figures 9 to 10 illustrate assembly procedure ofthe present invention including the following steps:
stripping the outer jacket 34 of the cable 28 for a length of approximately 20 mm;
untwisting the individual conductors 30 and inserting them into the sleeve 14;
cutting the access conductor from the front ofthe sleeve;
inserting the assembled sleeve 14 and cable 28 into the housing 10, wherein the sleeve 14 should be positioned directly under the contact blades 12;
terminating the completely assembled plug by means of a hand tool, or an auto-term:n~tion tool (not shown), thus completing the operation.
The main advantage ofthe present invention is a structure ofthe telephone plug allowing to reduce the amount of wire that is untwisted for termin~tinn, which enables to reduce or elimin~te Near End Crosstalk (NEXT), when data is transferred at frequency of 100 MHz corresponding to category 5 connectors. However, this structure is not restricted to category 5 connectors only and may be used for other modifications or categories of similar connectors.
21~7 ~6 It will be obvious to those ordinary skilled in the art that many changes may be made in the details of the above-described pl~r~lled embodiment of the present invention without departing from the spirit ofthe invention. Therefore, the scope ofthe present invention should only be determined by the following claims.
Claims (11)
1.Modular telephone plug comprising:
an insulation housing provided with a number of contacts mounted at one end or tip of said housing, said housing having a hollow body comprising two portions, wherein first of said two portions is adapted to accommodate a cable comprising an outer insulation jacket enclosing a number of individual conductors;
a sleeve or liner provided to accommodate ends of said individual conductors extending from said outer insulation jacket;
said sleeve is adapted to be placed into a second portion of said housing directly underneath of said contacts to facilitate successful electrical termination of said contacts with said individual conductors accommodated within said sleeve, wherein said sleeve is provided to eliminate a near end cross talk when data is transmitted by means of said telephone plug.
an insulation housing provided with a number of contacts mounted at one end or tip of said housing, said housing having a hollow body comprising two portions, wherein first of said two portions is adapted to accommodate a cable comprising an outer insulation jacket enclosing a number of individual conductors;
a sleeve or liner provided to accommodate ends of said individual conductors extending from said outer insulation jacket;
said sleeve is adapted to be placed into a second portion of said housing directly underneath of said contacts to facilitate successful electrical termination of said contacts with said individual conductors accommodated within said sleeve, wherein said sleeve is provided to eliminate a near end cross talk when data is transmitted by means of said telephone plug.
2. Plug according to claim 1, wherein said sleeve comprising a hollow insulation element having a number of inner grooves or channels adapted to accommodate each of said individual conductors.
3. Plug according to claim 2, wherein said channels are positioned parallel to each other and are aligned with the corresponding contacts mounted in said housing.
4. Plug according to claim 3, wherein said channels are positioned in the same horizontal plan.
5. Plug according to claim 4, wherein said sleeve further comprising slots or recesses formed directly above each of said channels, said slots are provided to facilitate successful piercing of said individual conductors by means of said corresponding contacts during electrical termination.
6. Plug according to claim 1, wherein each end of said individual conductors is completely accommodated within said sleeve and wherein in assembled position said sleeve is abutting or flush against the tip of said housing..
7. Plug according to claim 1, wherein said contacts comprising a number of blade-shaped elements mounted near the tip of said plug in vertical position, wherein upper edges of said contacts are adapted to be mated with corresponding female jack, and wherein lower edges of said contacts are adapted to be electrically terminated with the corresponding individual conductors.
8. Plug according to claim 1, wherein said housing further comprising a strain relieve element adapted to securely grip the outer insulation jacket inside of said housing to eliminate any undesirable sliding of said cable out of said housing.
9. Plug according to claim 8, wherein said strain relieve element is an integral part of said housing.
10. Plug according to claim 1, wherein said housing further comprising a metal shield mounted around said housing to prevent an electro-magnetic interferences.
11. Plug according to claim 1, wherein said housing and said sleeve are made of polycarbonate material or the like.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA002147446A CA2147446A1 (en) | 1995-04-20 | 1995-04-20 | Termination structure for modular telephone plug |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA002147446A CA2147446A1 (en) | 1995-04-20 | 1995-04-20 | Termination structure for modular telephone plug |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2147446A1 true CA2147446A1 (en) | 1996-10-21 |
Family
ID=4155692
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002147446A Abandoned CA2147446A1 (en) | 1995-04-20 | 1995-04-20 | Termination structure for modular telephone plug |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2147446A1 (en) |
-
1995
- 1995-04-20 CA CA002147446A patent/CA2147446A1/en not_active Abandoned
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Discontinued | ||
| FZDE | Discontinued |
Effective date: 19980420 |