CA1196701A - Two part snap together modular telephone jack - Google Patents
Two part snap together modular telephone jackInfo
- Publication number
- CA1196701A CA1196701A CA000440075A CA440075A CA1196701A CA 1196701 A CA1196701 A CA 1196701A CA 000440075 A CA000440075 A CA 000440075A CA 440075 A CA440075 A CA 440075A CA 1196701 A CA1196701 A CA 1196701A
- Authority
- CA
- Canada
- Prior art keywords
- extending
- insert
- portions
- aperture
- main body
- 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.)
- Expired
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
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R12/00—Structural associations of a plurality of mutually-insulated electrical connecting elements, specially adapted for printed circuits, e.g. printed circuit boards [PCB], flat or ribbon cables, or like generally planar structures, e.g. terminal strips, terminal blocks; Coupling devices specially adapted for printed circuits, flat or ribbon cables, or like generally planar structures; Terminals specially adapted for contact with, or insertion into, printed circuits, flat or ribbon cables, or like generally planar structures
- H01R12/70—Coupling devices
- H01R12/71—Coupling devices for rigid printing circuits or like structures
- H01R12/712—Coupling devices for rigid printing circuits or like structures co-operating with the surface of the printed circuit or with a coupling device exclusively provided on the surface of the printed circuit
- H01R12/716—Coupling device provided on the PCB
-
- 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
- H01R13/02—Contact members
- H01R13/33—Contact members made of resilient wire
-
- 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
- H01R13/46—Bases; Cases
- H01R13/502—Bases; Cases composed of different pieces
- H01R13/506—Bases; Cases composed of different pieces assembled by snap action of the parts
-
- 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
- H01R4/02—Soldered or welded connections
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R43/00—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors
- H01R43/20—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors for assembling or disassembling contact members with insulating base, case or sleeve
Abstract
TWO PART SNAP TOGETHER MODULAR TELEPHONE JACK
Abstract of the Disclosure A modular jack is formed of two parts, a body part and an insert. The body part is of hollow box-like form having a profile aperture in a front wall for a modular plug. A further aperture in the back wall receives the insert. The insert carries a plurality of spring cantilever contact members, the contact portions of which are bent round and back with the free ends positioned in a comb formed in the back wall. The insert is held in position by a deflectable finger having an inwardly extending projection which latches over the insert. Projecting members on one or more sides provide for mounting in different positions on members, for example on circuit boards.
The contact members are formed in long strips, in sets, the body parts are joined by frangible webs and the inserts are also joined by frangible webs. The inserts are molded round the contact members and inserts and body parts assembled, preferably by automated assembly apparatus.
-i-
Abstract of the Disclosure A modular jack is formed of two parts, a body part and an insert. The body part is of hollow box-like form having a profile aperture in a front wall for a modular plug. A further aperture in the back wall receives the insert. The insert carries a plurality of spring cantilever contact members, the contact portions of which are bent round and back with the free ends positioned in a comb formed in the back wall. The insert is held in position by a deflectable finger having an inwardly extending projection which latches over the insert. Projecting members on one or more sides provide for mounting in different positions on members, for example on circuit boards.
The contact members are formed in long strips, in sets, the body parts are joined by frangible webs and the inserts are also joined by frangible webs. The inserts are molded round the contact members and inserts and body parts assembled, preferably by automated assembly apparatus.
-i-
Description
~L9~7Q~
This invention relates to a two part snap together modu1ar telephone jack~ In particular the invention relates to a jack in which the parts can be molded as a continuous strip, and the parts automatically assembled. As a feature, the jacks can be molded in groups of a predetermined number, each group being for one telephone set. ~ome variation in a particular part of the jack in at least one of the members of a group can provide for the different jacks required for handset cord plugs and line cord plugs.
Modular jacks are now becoming the universal means for connectiny handset cords and line cords to the base and handset of a telephone set. Very large numbers are required and economy in manufacture, and assembly to a telephone set, is important. A
modular jack comprises a body having an aperture of a predetermined profile for reception of a plug. A line cord plug generally has a part of its profile with a dimension, or form, which differs from that of a handset cord, so that a line cord cannot be inadvertently inserted in a handset jack, and vice versa. The jack has a plurality of spring contacts which make connection with contacts in the plug.
In many cases, the jack is mounted on a circuit board, and the invention provides for circuit board mounting, as a further feature.
The contacts are formed in a continuous strip to permit feeding to a molding machine.
Broadly, a modular jack in accordance with the present invention has a hollow main body portion and an insert which carries the spring contacts, the insert being snapped into the main body portion. The contacts are formed in a continuous strip for feeding to a mold. In a feature of the invention the main body portions and ~9~
the inserts are molded in strips which can be fed to automatic assembly machines. The parts can be molded in groups in the strips, each group providing the jacks -for one telephone set.
The invention will be readily understood by the following description, in conjunction with the accompanying drawings, in which:-Figure 1 is a back view of a group of main bodyportions;
Figure 2 is a front view of the group of main body portions in Figure 1;
Figures 3 and 4 are cross-sections on the lines III-III
and IV-IV respectively, on Figure 1;
Figure 5 is a plan view of spring contacts in strip form;
Figure 6 is a plan view of inserts molded on to the spring contacts of Figure 5;
Figure 7 is a side view in the direction of arrow A in Figure 6;
Figure 8 is a cross-section on the line VIII-VIII of Figure 6;
Figures 9 and 10 are plan and side views respectively, similar to Figures 6 and 7, showing the contacts sheared from the strip and preformed; and Figure 11 is a cross-section through a main body portion, as in Figure 3, with an insert in position, the insert not in section.
~.~9~7~P~
As illustrated in Figures 1 to 4, a main body portion 10 is of a hollow, box-like form, having an aperture 11 in a front wall, the aperture being profiled at 12 to suit a plug. The portion 10 has a back wall 13 in which is formed a comb formation 14 for positioning the free ends of cantilevered spring contacts. There is also an aperture 15 extending in from the back wall, the aperture being generally rectangular, as seen in Figure 1. The aperture 15 extends towards the front wall and is seen in cross-section in Figure 4. There is a step 16 part way down the aperture, the lower part of the aperture tapering inwards.
At one side of the aperture 15, forming part of an end wall 17, is a deflectable finger 18. Finger 18 extends from the front of the body portion, to the back and at its free end 19 has an inwardly extending projection 20. In the example illustrated, two projections 21 extend from the end wall 17 and can be used for mounting the jack in a circuit board. Similar projections 22 can be provided alternatively or additionally on the back wall 13, thus giving alternative mounting positior,s.
The profile 12 of the aperture 11 can be variedO Thus in the group of three body portions 10 in Figure 2, the top body portion will be seen to have a wider profile at 12a, than in the other two top portions. This particular body portion could be for a line cord jack while the others could be for handset cord jacks.
Generally, a telephone set has three jacks, one in the handset and two in the base. One jack in the base is for a line cord plug and the other jack in the base and the jack in the handset are for handset cords. Thus it is convenient for the body portions 10 to ~.L~i7C~
be molded in groups of three. The portions 10 in a group are connected by a thin frangible web 25, and the groups are connected by thin frangible webs 26.
Figure 5 illustrates a part of a strip of terminals.
The cantilever portions which form spring contacts are indicated at 30. The portions which extend from -the jack for connection to conductors are indicated at 31. The terminals are formed by stamping from a strip of metal being connected at each end by frame members 32. The frame members 32 are perforated, at 33, to provide feed and location means. It is a feature that the spring contact portions can have precious metal inlays at 34. This a~oids the necessity of gold plating the terminals, which would otherwise be necessary to give satisfactory contact conditions. The terminals are conveniently formed in groups, corresponding to the groups of body portions 10.
Thus three sets of terminals can form a group, the sets at the same pitch as that of the body portions 10 in a group.
The terminals are fed to a mold and inserts are molded about the terminals, as seen in Figures b, 7 and 8. The inserts, indicated at 35, are molded around what can be considered as the transition portions of terminals, between portions 30 and 31. The inserts are molded in strips, connected by webs 36. The inserts are rectangular and are dimensioned to fi-t in the apertures 15 in the body portions 10. The inserts have a step 37 which rests on the step 16 in the body portion when an insert is assembled to a body portion.
After rnolding, the portions 30 and 31 are cut from the rails 32 and then formed. This is seen in Figures 9 and 10, particularly Figure 10. The spring contact portions 30 are bent 36~
round and up to extend at an angle to the inserts. Portions 31 can be left extending straight from the inserts, or can be bent to extend laterally as indicated by dotted outline at 31a in Figure lO. The portions 30 are formed or bent to a position which departs some small angle from the position of the portions 30 when the insert is assembled to a body portion. The position of the portions 30 in an assembled jack is indicated by dot-ted outline 30a.
Figure 11 illustrates a body portion lO, as shown in Figure 3, with an insert 35, as shown in Figure 10, assembled into position. The insert is pushed in, in the direction of arrow B. The spring contacts 30 are positioned in the slots of the comb 14. The insert is pushed down past the projection 20, and once the insert is fully inserted, the reaction of the cantilever spring contacts 30 push the insert back under the projection 20. A jack is inserted, as indicated by arrow C, into the aperture 11, the insert forming one wall of the aperture. The insert is located laterally by side walls 32 of aperture 15, and by the tapered lower portion 33 of the recess 15.
The final assembled jack is of the same basic form as that described in U.S. patent no. 3,850,497, issued November 26~ 1974.
However, the present invention is concerned with the manufacture of a jack which can be produced in a manner which enables automated assembly, and also automated insertion into circuit boards if desired. By providing mounting pins, or projections, on two sides which are normal to each other alternate mounting positions can be obtained.
This invention relates to a two part snap together modu1ar telephone jack~ In particular the invention relates to a jack in which the parts can be molded as a continuous strip, and the parts automatically assembled. As a feature, the jacks can be molded in groups of a predetermined number, each group being for one telephone set. ~ome variation in a particular part of the jack in at least one of the members of a group can provide for the different jacks required for handset cord plugs and line cord plugs.
Modular jacks are now becoming the universal means for connectiny handset cords and line cords to the base and handset of a telephone set. Very large numbers are required and economy in manufacture, and assembly to a telephone set, is important. A
modular jack comprises a body having an aperture of a predetermined profile for reception of a plug. A line cord plug generally has a part of its profile with a dimension, or form, which differs from that of a handset cord, so that a line cord cannot be inadvertently inserted in a handset jack, and vice versa. The jack has a plurality of spring contacts which make connection with contacts in the plug.
In many cases, the jack is mounted on a circuit board, and the invention provides for circuit board mounting, as a further feature.
The contacts are formed in a continuous strip to permit feeding to a molding machine.
Broadly, a modular jack in accordance with the present invention has a hollow main body portion and an insert which carries the spring contacts, the insert being snapped into the main body portion. The contacts are formed in a continuous strip for feeding to a mold. In a feature of the invention the main body portions and ~9~
the inserts are molded in strips which can be fed to automatic assembly machines. The parts can be molded in groups in the strips, each group providing the jacks -for one telephone set.
The invention will be readily understood by the following description, in conjunction with the accompanying drawings, in which:-Figure 1 is a back view of a group of main bodyportions;
Figure 2 is a front view of the group of main body portions in Figure 1;
Figures 3 and 4 are cross-sections on the lines III-III
and IV-IV respectively, on Figure 1;
Figure 5 is a plan view of spring contacts in strip form;
Figure 6 is a plan view of inserts molded on to the spring contacts of Figure 5;
Figure 7 is a side view in the direction of arrow A in Figure 6;
Figure 8 is a cross-section on the line VIII-VIII of Figure 6;
Figures 9 and 10 are plan and side views respectively, similar to Figures 6 and 7, showing the contacts sheared from the strip and preformed; and Figure 11 is a cross-section through a main body portion, as in Figure 3, with an insert in position, the insert not in section.
~.~9~7~P~
As illustrated in Figures 1 to 4, a main body portion 10 is of a hollow, box-like form, having an aperture 11 in a front wall, the aperture being profiled at 12 to suit a plug. The portion 10 has a back wall 13 in which is formed a comb formation 14 for positioning the free ends of cantilevered spring contacts. There is also an aperture 15 extending in from the back wall, the aperture being generally rectangular, as seen in Figure 1. The aperture 15 extends towards the front wall and is seen in cross-section in Figure 4. There is a step 16 part way down the aperture, the lower part of the aperture tapering inwards.
At one side of the aperture 15, forming part of an end wall 17, is a deflectable finger 18. Finger 18 extends from the front of the body portion, to the back and at its free end 19 has an inwardly extending projection 20. In the example illustrated, two projections 21 extend from the end wall 17 and can be used for mounting the jack in a circuit board. Similar projections 22 can be provided alternatively or additionally on the back wall 13, thus giving alternative mounting positior,s.
The profile 12 of the aperture 11 can be variedO Thus in the group of three body portions 10 in Figure 2, the top body portion will be seen to have a wider profile at 12a, than in the other two top portions. This particular body portion could be for a line cord jack while the others could be for handset cord jacks.
Generally, a telephone set has three jacks, one in the handset and two in the base. One jack in the base is for a line cord plug and the other jack in the base and the jack in the handset are for handset cords. Thus it is convenient for the body portions 10 to ~.L~i7C~
be molded in groups of three. The portions 10 in a group are connected by a thin frangible web 25, and the groups are connected by thin frangible webs 26.
Figure 5 illustrates a part of a strip of terminals.
The cantilever portions which form spring contacts are indicated at 30. The portions which extend from -the jack for connection to conductors are indicated at 31. The terminals are formed by stamping from a strip of metal being connected at each end by frame members 32. The frame members 32 are perforated, at 33, to provide feed and location means. It is a feature that the spring contact portions can have precious metal inlays at 34. This a~oids the necessity of gold plating the terminals, which would otherwise be necessary to give satisfactory contact conditions. The terminals are conveniently formed in groups, corresponding to the groups of body portions 10.
Thus three sets of terminals can form a group, the sets at the same pitch as that of the body portions 10 in a group.
The terminals are fed to a mold and inserts are molded about the terminals, as seen in Figures b, 7 and 8. The inserts, indicated at 35, are molded around what can be considered as the transition portions of terminals, between portions 30 and 31. The inserts are molded in strips, connected by webs 36. The inserts are rectangular and are dimensioned to fi-t in the apertures 15 in the body portions 10. The inserts have a step 37 which rests on the step 16 in the body portion when an insert is assembled to a body portion.
After rnolding, the portions 30 and 31 are cut from the rails 32 and then formed. This is seen in Figures 9 and 10, particularly Figure 10. The spring contact portions 30 are bent 36~
round and up to extend at an angle to the inserts. Portions 31 can be left extending straight from the inserts, or can be bent to extend laterally as indicated by dotted outline at 31a in Figure lO. The portions 30 are formed or bent to a position which departs some small angle from the position of the portions 30 when the insert is assembled to a body portion. The position of the portions 30 in an assembled jack is indicated by dot-ted outline 30a.
Figure 11 illustrates a body portion lO, as shown in Figure 3, with an insert 35, as shown in Figure 10, assembled into position. The insert is pushed in, in the direction of arrow B. The spring contacts 30 are positioned in the slots of the comb 14. The insert is pushed down past the projection 20, and once the insert is fully inserted, the reaction of the cantilever spring contacts 30 push the insert back under the projection 20. A jack is inserted, as indicated by arrow C, into the aperture 11, the insert forming one wall of the aperture. The insert is located laterally by side walls 32 of aperture 15, and by the tapered lower portion 33 of the recess 15.
The final assembled jack is of the same basic form as that described in U.S. patent no. 3,850,497, issued November 26~ 1974.
However, the present invention is concerned with the manufacture of a jack which can be produced in a manner which enables automated assembly, and also automated insertion into circuit boards if desired. By providing mounting pins, or projections, on two sides which are normal to each other alternate mounting positions can be obtained.
Claims (8)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. A modular telephone jack comprising a hollow main body portion and an insert which snaps into the main body portion, the insert carrying spring contacts, the main body portion being of box-like form having front and back walls; a profiled aperture in said front wall for reception of a modular plug; a comb formation in said back wall for positioning free ends of cantilevered spring contacts; a further aperture in said back wall and extending towards said front wall and a step in said further aperture intermediate said front and back walls; a deflectable finger extending at one side of said further aperture and having a free end at said back wall, said finger having an inwardly extending projection at its free end, the projection extending into said further aperture;
said insert comprising a body part profiled to fit in said further aperture, and a plurality of terminals extending through the body part, each terminal including a cantilever portion extending in one direction from an inner end of the body part and a conductor connection part extending in an opposite direction from an outer end of the body part, said cantilever portions bent round and back with the free ends extending over said body part, said body part including a step to abut the step in said further aperture in said main body portion;
the insert inserted into said further aperture, said free ends of said cantilever portions positioned in said comb, and said projection on said finger extending over said outer end of said body part of the insert, to retain said insert in said main body portion.
said insert comprising a body part profiled to fit in said further aperture, and a plurality of terminals extending through the body part, each terminal including a cantilever portion extending in one direction from an inner end of the body part and a conductor connection part extending in an opposite direction from an outer end of the body part, said cantilever portions bent round and back with the free ends extending over said body part, said body part including a step to abut the step in said further aperture in said main body portion;
the insert inserted into said further aperture, said free ends of said cantilever portions positioned in said comb, and said projection on said finger extending over said outer end of said body part of the insert, to retain said insert in said main body portion.
2. A modular jack as claimed in claim 1, including projections extending from at least one surface, normal thereto, said projections adapted for positioning in holes for mounting of said jack.
3. A module jack as claimed in claim 2, including projections extending from said back wall.
4. A modular jack as claimed in claim 2, including projections extending from an end wall extending at right angles to said back wall.
5. A modular jack as claimed in claim 2, including projections extending from said back wall and from an end wall extending at right angles to said back wall.
6. A plurality of modular jacks as claimed in claim 1, including a thin frangible web extending between main body portions, to form a group of body portions.
7. A plurality of jacks as claimed in claim 6, said profiled aperture in one of said body portions being of a wider profile than the profiled apertures in the other said body portions.
8. A method of manufacturing modular jacks, comprising:-molding a plurality of main body portions in elongate spaced relationship, the body portions joined by thin frangible web portions, each body portion being of hollow box-like form having front and back walls, a profiled aperture in said front wall for reception of a modular plug, a comb formation in said back wall for positioning free ends of cantilever spring contacts, a further aperture extending from said back wall towards said front wall and including a step positioned intermediate the back and front walls, and a deflectable finger extending at one side of said further aperture and having an inwardly extending projection at its free end at said back wall, the projection extending into said further aperture;
forming a strip of terminals in a spaced relationship, the terminals spaced in sets, a set for each jack, the sets spaced on a pitch equal to the spacing of said main body portions, the terminals each having a contact portion at one end and a conductor connection portion at the other end, the ends of said contact portions and conductor connecting portions connected by frame members;
molding an insert about each set of terminals, each insert of a shape to fit in one of said further apertures and including a step to abut said step in a further aperture, the inserts connected by thin frangible web portions;
removing said frame members and forming said contact portions to extend round and back over said inserts;
feeding said inserts and said main body portions in superposed positional relationship and pressing said inserts into said further apertures, the free ends of said contact portions extend into said comb, said projections on said fingers retaining said inserts in said main body portions.
forming a strip of terminals in a spaced relationship, the terminals spaced in sets, a set for each jack, the sets spaced on a pitch equal to the spacing of said main body portions, the terminals each having a contact portion at one end and a conductor connection portion at the other end, the ends of said contact portions and conductor connecting portions connected by frame members;
molding an insert about each set of terminals, each insert of a shape to fit in one of said further apertures and including a step to abut said step in a further aperture, the inserts connected by thin frangible web portions;
removing said frame members and forming said contact portions to extend round and back over said inserts;
feeding said inserts and said main body portions in superposed positional relationship and pressing said inserts into said further apertures, the free ends of said contact portions extend into said comb, said projections on said fingers retaining said inserts in said main body portions.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000440075A CA1196701A (en) | 1983-10-31 | 1983-10-31 | Two part snap together modular telephone jack |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000440075A CA1196701A (en) | 1983-10-31 | 1983-10-31 | Two part snap together modular telephone jack |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1196701A true CA1196701A (en) | 1985-11-12 |
Family
ID=4126412
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000440075A Expired CA1196701A (en) | 1983-10-31 | 1983-10-31 | Two part snap together modular telephone jack |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1196701A (en) |
-
1983
- 1983-10-31 CA CA000440075A patent/CA1196701A/en not_active Expired
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| Date | Code | Title | Description |
|---|---|---|---|
| MKEC | Expiry (correction) | ||
| MKEX | Expiry |