U.S. patent number 3,713,073 [Application Number 05/105,326] was granted by the patent office on 1973-01-23 for electrical connector.
This patent grant is currently assigned to Thomas & Betts Corporation. Invention is credited to Ronald S. Narozny.
United States Patent |
3,713,073 |
Narozny |
January 23, 1973 |
ELECTRICAL CONNECTOR
Abstract
An improved electrical connector for flat cable comprising a
selectively segmented relatively flat housing, an appropriately
contoured base member releasably securable therewithin, and a
plurality of terminating members positionable within associated
spaced recesses longitudinally disposed adjacent one edge of the
base member. Extending within the base member and terminating in an
elongated opening adjacent the spaced recesses therein is a narrow
slot-like cable receiving passage through which may be fed the
terminating end of a flat cable, each of the bared conductor ends
of which may then be bonded to an associated terminating member.
Strain relief means extending at least partially into said passage
may be provided to secure the cable therewithin. Complementarily
contoured portions on the base member and housing, respectively,
permit releasable, locking interengagement therebetween.
Inventors: |
Narozny; Ronald S. (Panorama
City, CA) |
Assignee: |
Thomas & Betts Corporation
(Elizabeth, NJ)
|
Family
ID: |
22305186 |
Appl.
No.: |
05/105,326 |
Filed: |
January 11, 1971 |
Current U.S.
Class: |
439/456;
439/499 |
Current CPC
Class: |
H01R
12/775 (20130101); H01R 12/778 (20130101) |
Current International
Class: |
H01R
12/00 (20060101); H01R 12/24 (20060101); H01r
013/58 () |
Field of
Search: |
;339/17,176,91,105,107,186,121,276SF,206,126,128,116,63 |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Moore; Richard E.
Claims
The embodiments of the invention in which an exclusive property or
privilege is claimed are defined as follows:
1. An electrical connector for flat cable comprising: a generally
flat rectangular base member having an upper surface, a lower
surface arranged in generally parallel planar relationship with
respect to said upper surface, a first edge, a second edge, said
first and second edges defining the lateral extent of said base
member, a first end, a second end, said first and second ends
defining the longitudinal extent of said base member, a cable
receiving portion extending longitudinally a predetermined distance
from said base member second end towards said base member first
end, a terminal receiving portion disposed adjacent said cable
receiving portion and extending therefrom to said base member first
end, said cable receiving portion having an aperture extending
longitudinally therethrough, said aperture being proportioned to
receive a selective length of flat conductor cable in close fitting
relationship therein, said terminal receiving portion having a
plurality of longitudinally extending, laterally spaced recesses
communicating with said base member first end; a housing removably
disposed about said base member and attached thereto, said housing
encompassing said base member upper and lower surfaces, said
housing further having a plurality of spaced openings adjacent one
edge thereof, each of said openings being coincident with a
corresponding one of said base member terminal receiving portion
recesses; and a plurality of terminal members, each being
selectively connectable to an associated conductor of a flat cable
and at least partially positioned within an associated one of said
recesses in said base member terminal receiving portion.
2. An electrical connector as defined in claim 1 further comprising
means for releasably retaining said base member within said
housing.
3. An electrical connector as defined in claim 2 wherein said
retaining means comprises at least one raised portion disposed on
said base member and at least one complementarily contoured
recessed portion in said housing matingly cooperable with said
raised portion.
4. An electrical connector as defined in claim 2 wherein said
retaining means comprises at least one recessed portion in said
base member and at least one raised portion disposed on said
housing matingly cooperable with said recessed portion.
5. An electrical connector as defined in claim 1 wherein said base
member further comprises strain relief means disposed in said base
member cable receiving portion aperture.
6. An electrical connector as defined in claim 5 wherein said
strain relief means comprises a protruding portion depending at
least partially into said aperture in said base member cable
receiving portion.
7. An electrical connector as defined in claim 6 wherein said
protruding portion is provided with an at least partially
interrupted surface.
8. An electrical connector as defined in claim 1 wherein said
housing is provided with a plurality of spaced, generally parallel
transverse members extending interiorly between the opposing
surfaces of said housing, said transverse members at least
partially defining a plurality of longitudinally aligned guiding
apertures coincident with said spaced openings in said housing,
each of said guiding apertures being disposed in such manner as to
at least partially encompass an associated one of said terminal
members.
9. An electrical connector as defined in claim 1 wherein a portion
of each of said terminal members is formed in such manner as to
define a female receptacle arranged to receive therein a mating
tab.
10. An electrical connector as defined in claim 1 wherein a portion
of each of said terminal members is formed in such manner as to
define a male tab arranged for engagement within a mating female
receptacle.
11. An electrical connector as defined in claim 1 further
comprising orienting means provided on said connector wherein said
connector may be coupled to a mating connector in only one
predetermined position.
12. An electrical connector as defined in claim 1 further
comprising coupling means adjacent said base member cable receiving
portion for coupling said connector to a further substantially
similar connector in adjacent generally parallel planar
relationship.
Description
BACKGROUND OF THE INVENTION
1. Field of the Invention
The invention is directed to the field of connectors and
principally to an electrical connector for multiconductor cable,
such as flat cable.
2. Description of the Prior Art
Electrical connectors for flat cable, for example, according to the
prior art, generally comprised a plurality of wire terminating
members rigidly secured to a support member, wherein each of the
bared ends of the flat cable were required to be bonded,
individually, to an associated terminal in a relatively slow,
time-consuming operation. Upon the completion of the bonding
operation, it was generally necessary to provide additional means
for protecting the terminated junction and for restraining the
adjacent extending portion of the cable in an attempt to secure the
integrity of the completed juncture. Such means were often
cumbersome, expensive, and frequently inadequate, being confined
generally, in one form, to a relatively complex composite structure
comprising mating cover members securable to the support member, or
to each other, by means of separate threaded fasteners or the like,
the plurality of elements thus required being readily subject to
loss, breakage and misassembly. Difficulty was generally
experienced in providing adequate strain relief means due to the
nature of the cable configuration, the relatively thin flat
structure thereof precluding the use of conventional cable
encircling means. Additionally, further difficulty was generally
experienced when attempting to remove, alter or modify, where
necessary, one or more of the completed connections within the
connector because of the fixed close relationship between adjacent
terminating members therein.
SUMMARY OF THE INVENTION
The invention overcomes the limitations and difficulties noted
above with respect to prior art devices by providing a plurality of
removable terminating members selectively disposed within a slotted
base member adapted to be releasably secured within an
appropriately contoured housing, resulting in an electrical
connector for flat cable which is more effective, efficient,
reliable and convenient than such prior art devices. A plurality of
appropriately contoured spaced recesses are provided adjacent one
edge of the terminal receiving portion of the base member, each
being suitably arranged to receive therein an associated male or
female terminating member after the connection of said terminating
members to associated bared conductor ends of a flat cable. The
terminating members may be supplied either individually or in strip
form, the latter configuration affording a rapid, convenient means
for the termination of the flat cable thereto, the spacing between
adjacent terminating members being arranged to conform to the
spacing between adjacent flat cable conductors connectable thereto.
Adjacent the terminal receiving portion of the base member is a
cable receiving portion appropriately apertured to provide a
selectively proportioned cable receiving passage therethrough
arranged to permit the insertion therethrough of the terminating
end of a flat cable prior to its connection to the associated
connector terminating members. Depending inwardly generally
transverse to the plane of the cable receiving passage and
providing at least a partial restriction thereof is a generally
elongated protrusion serving to cause at least a partial planar
deformation of a flat cable disposed within the cable receiving
passage thereby providing an effective strain relief means
therefor. The surface of the protrusion may be suitably
interrupted, where necessary or desired, as by serrating or the
like, to increase the frictional engagement between said surface
and the adjacent mating portion of the flat cable. Positionable
over the base member and releasably securable thereto is an
integral housing appropriately chambered to provide a relatively
close mating fit with said base member. A plurality of spaced,
generally parallel transverse ribs extending between the opposing
adjacent inner surfaces of the housing serve to define a plurality
of guiding apertures arranged to at least partially encompass the
terminating members disposed within associated recesses in the base
member, thus forming, in conjunction with said base member
recesses, a series of selectively dimensioned, terminating member
compartments. Retaining means in the form of cooperable,
complementarily formed, mating portions are provided on said
housing and said base member to permit said members to be
releasably lockingly interengaged. To afford positional orientation
of the electrical connector with respect to a complementary mating
member, where desired, suitably formed orienting means comprising
an aperture or protrusion adjacent the outer surface of the housing
and configured to cooperate with a complementary portion on the
mating member is provided therefor. The versatility of the
electrical connector may be further increased by the inclusion
thereon of means for permitting said connector to be coupled
adjacent a similar connector in aligned stacked arrangement, to
provide a plurality of selectively positioned terminating contacts
in excess of that attainable within the confines of a single
connector. In one embodiment, such means comprise preferably an
elongated recessed portion adjacent one edge of the base member and
a complementarily formed raised portion adjacent the opposing edge,
said portions being arranged to interlock with similarly formed
mating portions of a further connector. It is therefore an object
of this invention to provide an improved electrical connector.
It is a further object of this invention to provide an improved low
profile electrical connector for use in conjunction with a
multiconductor flat cable.
It is another object of this invention to provide an improved
electrical connector for flat cable having releasably interlocking
members arranged to permit the rapid assembly and disassembly
thereof.
It is yet another object of this invention to provide an improved
electrical connector comprising separable terminating members
arranged to permit the rapid connection thereto of the terminating
end of a multiconductor flat cable.
It is still another object of this invention to provide an improved
electrical connector for flat cable having unique strain relief
means incorporated therewithin.
It is yet a further object of this invention to provide an improved
low profile electrical connector for flat cable matingly stackable
adjacent a similar connector to effect an increased aggregate
terminating capacity therewith.
Other objects and feature of the invention will be pointed out in
the following description and claims and illustrated in the
accompanying drawings, which disclose, by way of example, the
principle of the invention and the best mode which has been
contemplated for carrying it out.
BRIEF DESCRIPTION OF THE DRAWINGS
In the drawings:
FIG. 1 is a top plan view of an electrical connector constructed in
accordance with the concepts of the invention, including therewith
a portion of multiconductor flat cable terminated therewithin.
FIG. 2 is an exploded perspective view of the electrical connector
of FIG. 1, showing the base member, female terminal members, and
housing thereof.
FIG. 3 is a top plan view, partly in section, of the base member of
the connector of FIG. 1, showing the female terminal members
therewithin connected to one end of a flat cable.
FIG. 4 is a side elevational view, in section, of the base member
of FIG. 3 taken along the line 4--4.
FIG. 5 is a top plan view of the base member and female terminal
members of the connector of FIG. 1 showing a flat cable inserted
through the base member and disposed adjacent the terminal members
preparatory to termination therewith.
FIG. 6 is a top plan view of the members of FIG. 5 after assembly
of the terminating end of the flat cable to the associated terminal
members.
FIG. 7 is a perspective view of a portion of a strip of male
terminal members according to the concepts of the invention.
FIG. 8 is a top plan view of a pair of mating electrical connectors
for flat cable constructed in accordance with the concepts of the
invention.
FIG. 9 is a top plan view of the electrical connector of FIG. 1
disposed adjacent a mating terminal board.
FIG. 10 is a perspective view of the electrical connector of FIG. 1
disposed in stacking arrangement adjacent further similar
connectors.
FIG. 11 is a fragmentary side elevational view, in section, of a
portion of the base member of the connector of FIG. 1 showing an
embodiment of a strain relief means therein according to the
concepts of the invention.
FIG. 12 is a fragmentary side elevational view, in section, of an
electrical connector locking means according to the concepts of the
invention.
FIG. 13 is a fragmentary side elevational view, in section, of the
rear portion of the stacked electrical connector arrangement of
FIG. 10.
FIG. 14 is a fragmentary side elevational view, in section, of a
further embodiment of an electrical connector locking means
according to the concepts of the invention.
Similar elements are given similar reference characters in each of
the respective drawings.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
Turning now to FIGS. 1, 2, 3 and 4, there is shown an electrical
connector 20 constructed in accordance with the concepts of the
invention. Connector 20 comprises a relatively flat base member 22
having a cable receiving portion 24 and a terminal receiving
portion 26 in generally coplanar adjacent relationship. Disposed
along the leading edge 28 of the terminal receiving portion 26 in
spaced parallel relationship and extending rearwardly towards the
cable receiving portion 24, are a plurality of terminal receiving
recesses 30, each being selectively contoured to receive therein an
associated terminal member such as 32. Extending through the cable
receiving portion 24, generally parallel to the outer faces 34, 34'
thereof and terminating adjacent the terminal receiving portion 26
of base member 22 in an opening 36 in FIG. 2 is a cable receiving
aperture 38, as is more clearly shown in FIG. 4, said aperture 38
being arranged to permit the insertion therethrough of a flat
multiconductor cable such as 40. As may be more clearly seen in
FIG. 4, aperture 38 extends from the rear flanged portion 42 of
base member 22 towards the terminal receiving portion 26, being
interrupted generally intermediate its length by a laterally
extending protrusion 44 depending into aperture 38 and providing a
strain relief means arranged to at least partially planarly deform
cable 40 in a manner substantially as shown in FIG. 4 wherein cable
40 may be restrictively restrained against the walls defining
aperture 38. Although the free end 46 of protrusion 44 is shown in
FIG. 4 as having a relatively smooth planar surface, the surface
thereof may be appropriately modified as by serrating or the like,
as shown at 48 in FIG. 11, to enhance the restraining effect
thereof. It will be readily apparent to those skilled in the art
that other suitable modifications of protrusion 44 may be provided
without departing from the spirit of the invention. For example,
the side walls 50 of protrusion 44, illustrated in FIG. 4 as having
relatively smooth surfaces, may be suitably modified to provide an
irregular surface as at 52 in FIG. 11, thereby further enhancing
the frictional engagement between said surfaces 52 and the adjacent
surface of cable 40, where desired. Extending outwardly from face
34 of base member cable receiving portion 22 are a pair of spaced,
selectively contoured protrusions 56, 56', the purpose of which is
more fully described below. The terminal members 32 are shown in
FIG. 2 as preferably coupled to and depending outwardly from a
connecting strip 58 arranged to be removed therefrom prior to the
disposition of said terminals 32 within their associated recesses
30 in base member 22, to facilitate the use of a mass-bonding
technique wherein all of the bared conductor ends 60 (FIG. 5) of a
flat cable such as 40 may be bonded to the respective terminal
members 32 simultaneously. The manner in which this may be
accomplished is more fully described below. Positionable over base
member 22 and releasably engageable therewith is an appropriately
contoured integral housing 62. A pair of recesses 64, 64'
longitudinally disposed in spaced relationship adjacent the rear
edge 66 of housing 62 are proportioned to matingly cooperate with
the base member protrusions 56, 56' respectively to provide
releasable locking engagement therebetween, as may be more clearly
seen in FIG. 12. As further illustrated in FIG. 12, additional
protrusions 68, 68' may be provided on base member 22, as, for
example, adjacent its face 34' and suitably arranged to releasably
lockingly engage additional recesses 70, 70' in housing 62 where
such additional locking means are necessary or desired. The
relative positions of the respective protrusions 56, 56' and mating
recesses 64, 64' may be suitably interchanged, in such manner as
shown in FIG. 14, as to provide recesses 98 in base members 22
matingly cooperable with associated protrusions 100 on housing 62
without departing from the spirit of the invention. Alternatively,
each member may be provided with at least one recess and one
protrusion to effect the locking engagement described, within the
teaching herein disclosed. A plurality of generally parallel,
spaced transverse members 72 extending between the opposing inner
surfaces (not shown of housing 62 and terminating adjacent the
forward edge 74 thereof serve to define a plurality of guiding
apertures 76, each arranged to provide a compartment-like chamber
for the receipt therein of at least a portion of an associated
terminal member 32.
To more fully appreciate the novel advantages of connector 20 and
the termination of a multiconductor flat cable thereto, reference
is now made to FIGS. 3, 5 and 6. The terminating end 78 of cable 40
is inserted within base member cable receiving aperture 38 from the
rearward end adjacent flanged portion 42 and advanced through
aperture 38, around the strain relief protrusion 44, and through
the forward slot opening at 36. A sufficient length of cable 40
should be so advanced through aperture 38 to permit the convenient
manipulation thereof during the subsequent bonding operation. Each
of the bared ends 60 of cable 40 are then disposed adjacent the
conductor receiving portion 80 of an associated terminal member 32
and bonded thereto by the employment of either one of several well
known methods, such as soldering, welding, brazing or the like. For
convenience, and to facilitate the bonding operation, terminals 32
may be supplied in reel or strip form wherein said terminals are
maintained in a predetermined spaced relationship adjacent
removable connecting strip 58, the spacing between terminals 32
being selectively arranged to conform to the spacing between
adjacent conductors 60 of cable 40. Thus, by the use of well known
multiple bonding techniques, it is readily apparent that all of the
terminal members 32 may be simultaneously bonded to the associated
bared conductor ends 60 of cable 40 in a single efficient, rapid
and economical operation. The connecting strip 58 is thereafter
separated from its associated terminal members 32, resulting in a
configuration similar to that shown in FIG. 6. Cable 40 is then
retracted partially through aperture 38 sufficiently to permit each
of the terminal members 32 to be properly positioned within its
associated recess 30 in the base member terminal receiving portion
26, substantially as shown in FIG. 3. Although terminal members 32
have been shown generally as female contacts, it is not intended
that the invention be limited thereby, since it will be readily
apparent to those skilled in the art that male contact terminal
members such as 82 (FIG. 7) may be similarly effectively employed
without departing from the spirit of the invention. It will also be
apparent to the skilled art worker that a combination of male and
female contact terminal members may be readily intermixed in
appropriate arrangement in a particular connector, according to the
concepts of the invention, without departing from the spirit
thereof. Base member 22 may now be inserted within housing 62 and
lockingly engaged thereto, the relationship of the protrusions 56,
56' on base member 22 with respect to their mating recesses 64, 64'
in housing 62 being arranged in such manner as to permit either a
mandatory or discretionary orientation of the housing 62 adjacent
base member 22. For example, where protrusions 56, 56' are disposed
solely on one surface 34 of the base member 22, as shown in FIG. 2,
the disposition of a mating pair of recesses such as 64, 64' within
only one surface of housing 62 will effect a mandatory orientation
therebetween. However, the inclusion of an additional pair of
recesses such as 70, 70' (FIG. 12) suitably disposed within the
opposite surface of housing 62 will permit a mating between housing
62 and base member 22 in either one of the two possible
orientations. Similarly, selective positioning of base member
protrusions 56, 56' with respect to the associated mating housing
recesses 64, 64' may be effectively employed to accomplish the
desired orientation. Where it is desired to establish a particular
orientation of connector 20 with respect to a mating member,
further orienting means such as locating recess 84 disposed
adjacent the front edge 74 of housing 62 may be effectively
utilized. Recess 84 may be selectively proportioned to engage a
complementary protrusion such as 86 in member 88, as is more
clearly shown in FIG. 8, member 88 being arranged to interengage
with connector 20 to form a completed electrical connection
therebetween. Similar interengagement may be effected between
connector 20 and an appropriately arranged terminal board such as
90 (FIG. 9), board 90 including therewith a locating protrusion 92
functioning in a manner similar to protrusion 86 of FIG. 8.
Turning now to FIGS. 10 and 13, there is shown a stacked
arrangement of three electrical connectors 20 according to the
concepts of the invention. The rear flanged portion 42 of each
connector 20 is provided with a longitudinally extending coupling
recess 94 adjacent one edge thereof and a mating complementary
coupling rib 96 adjacent the opposing edge as shown in FIG. 13. Rib
96 of one of the connectors 20 is proportioned to matingly engage
an associated recess 94 in the adjacent connector 20 in such manner
as to effect a snap fit therebetween, wherein a plurality of
connectors such as 20 may be conveniently stacked in aligned
overlapping arrangement substantially as shown, where, for example,
it is necessary or desired to terminate a plurality of flat cables
40 within a relatively restricted area. Although the adjoining ribs
96 and recesses 94 may be formed in such manner as to provide
readily releasable interengagement therebetween, they may be
appropriately contoured to provide a nonseparable interengaged
assembly where, for example, it is necessary or desired to maintain
a relatively permanent relationship between adjacent cables 40. It
will be apparent to those skilled in the art that although the
mating ribs 96 and recesses 94 are shown disposed adjacent the rear
flanged portion 42 of connector 20, they may be arranged, with
equal effectiveness, adjacent other suitable portions of connector
20 without departing from the spirit, and according to the
teaching, of the invention.
* * * * *