lliilllllillll|||llllllllllllllllllllllllllllllllllllllllllllllllllliillll

lliilllllillll|||llllllllllllllllllllllllllllllllllllllllllllllllllliillll
lliilllllillll|||llllllllllllllllllllllllllllllllllllllllllllllllllliillll
USOO5556292A
United States Patent [191
[11]
Patent Number:
Kato et al.
[45]
Date of Patent:
[54]
CABLE CONNECTOR
[75] Inventors: Tatsuo Kato; Katsuhiko Kishi;
Takeshi Matsuda, all of Yokohama,
Japan
[73] Assignee: SMK Corporation, Tokyo, Japan
[21] Appl. No_: 410,034
[22] Filed:
Mar. 23, 1995
[30]
Foreign Application Priority Data
Apr. 22, 1994
[JP]
Japan .................................. .. 6-107740
[51]
Int. Cl.6 ................................................... .. H01R 27/00
[52]
U.S. Cl. . . . . .
[58]
Field of Search ................................... .. 439/578-585,
. . . . ..
439/218; 439/675; 439/851
439/675, 322, 344, 63, 825, 851, 842, 843,
[56]
References Cited
U.S. PATENT DOCUMENTS
3,246,077
3,858,156
4/1966 Betcher et a1. . ...................... .. 439/218
12/1974 Zarro ..................................... .. 439/221
5,556,292
Sep. 17, 1996
4,537,453
8/1985 Takeuchi
5,137,469
8/1992 Carpenter .............................. .. 439/218
439/217
Primary Examiner—David L. Pirlot
Attorney, Agent, or Firm—-Thomas R. Morrison; Christo
pher R. Pastel
[57]
ABSTRACT
A cable connector includes a plug for connecting a coaxial
cable to an electronic device such as a television or video
cassette recorder. The plug includes a sleeve that connects
with a ?rst grounding terminal of a receptacle. An outer
diameter of the sleeve is dimensioned to provide a good
unstressed interference ?t with the ?rst grounding terminal.
The sleeve has slits in a portion to permit elastic deformation
when connecting with a second grounding terminal having
an inner’ diameter less than that of the ?rst grounding
terminal. These slits permit the sleeve to compress su?i
ciently to form an interference ?t inside the second ground
ing terminal. When both the ?rst grounding terminal of the
receptacle and the sleeve of the plug are dimensioned for the
PAL format, and the second grounding terminal is dimen
sioned for the SECAM format, the plug ?ts either grounding
terminal.
10 Claims, 8 Drawing Sheets
U.S. Patent
Sep. 17, 1996
Sheet 1 of 8
5,556,292
1
FIG.
U.S. Patént
Sep. 17, 1996
Sheet 2 of 8
5,556,292
.OE
N
US. Patent
Sep. 17, 1996
Sheet 3 of 8
5,556,292
28
/
FIG. 3
FIG. 4
US. Patent
Sep. 17, 1996
Sheet 4 of 8
5,556,292
US. Patent
Sep. 17, 1996
Sheet 5 0f 8
5,556,292
US. Patent
Sep. 17, 1996
Sheet 6 of 8
5,556,292
FIG.7
U.S. Patent
Sep. 17, 1996
Sheet 7 of 8
5,556,292
wv.OE .mo5E2m
US. Patent
Sep. 17, 1996
Sheet 8 of 8
5,556,292
14
9HQ. APRIOTR
36
5,556,292
1
2
CABLE CONNECTOR
and a SECAM format TV. A SECAM format cable cannot be
used to connect PAL format devices (VCR’s and TV’s) to
BACKGROUND OF THE INVENTION
each other nor can it be used to connect a SECAM format
device to a PAL format device. Cables with connectors of the
The present invention relates to a cable connector such as
two formats are color-coded to prevent confusion caused by
attempting to connect SECAM format devices using a PAL
format cable and vice versa.
Referring to FIG. 9, a conversion connector 46 permits a
used with an RF cable for connecting a VCR (video cassette
recorder) to a TV (television) receiver (e.g., a coaxial cable
with connector plugs). Such a cable connector may also be
used with an antenna cable for connecting an antenna to a
television receiver or VCR.
A coaxial cable has a central conductor surrounded by a
PAL format cable to connect a PAL format VCR to a
SECAM format TV. A PAL format cable 10 includes a
coaxial cable 11 and a plug 14. A SECAM format TV 36
concentric outer conductor and separated from it by a
includes a receptacle 38 which is also in the SECAM format.
dielectric material. The concentric outer conductor is a
Conversion connector 46 includes a center connection con
metallic shield generally made of braided copper or metal
ductor 42 and a ground connection conductor 44. Outer
diameter D (9.525 mm) of sleeve 20 of plug 14 is too large
to ?t inside an inner diameter N. of grounding terminal 40
of receptacle 38 of SECAM TV 36. Since a standard
tape. A cable connector is attached to a coaxial cable to plug
into a receptacle on a device.
Devices such as TV’s and VCR’s are regionally standard
ized. For instance, European color television broadcasts use
the PAL (Phase Alternate Line) format and SECAM
(Sequential Couleur a Memoire) format, unlike the United
States and Japan, which use the NTSC (National TV System
Committee) format. Speci?cally, the PAL format is used in
the United Kingdom and Germany, while the SECAM
format is used in France and Russia. Physical connectors
used with one format are not necessarily compatible with
physical connectors used with a different format.
Referring to FIG. 8, a prior an RF cable 10 with integral
SECAM format plug has a sleeve with an outer diameter of
9.0 mm, N, is a value smaller than 9.0 mm by a prescribed
20
25
end and a PAL plug on the other end can be used instead of
a conversion connector 46 to connect two dissimilar devices.
Thus, when connecting devices with different formats,
such as the PAL format and the SECAM format, it is
necessary to have additional parts such as a conversion
connector or a conversion cable. This increases the number
connectors includes coaxial cable 11 with a socket connector
12 on one end and a plug 14 on another end. Coaxial cable
of parts required to be manufactured and warehoused, mak
11 also includes a conventional central conductor (not
shown), an insulator (not shown), and a concentric outer
ing operations more complicated and raising costs. Further
more, problems arise when trying to connect dissimilar
devices using a SECAM format cable or a PAL format cable.
conductor (not shown). A center pin 16 of plug 14 is
electrically connected to the central conductor of coaxial
cable 11. A sleeve 20 is electrically connected to the outer
conductor of coaxial cable 11. Sleeve 20 is separated from
center pin 16 by an insulator 18. An insulating cover 22 over
amount so that an interference ?t for good elastic contact can
be made.
A special cable (not shown) having a SECAM plug on one
The two formats are close enough that a user often believes
35
that the cable should connect properly. The user may then try
to force a ?t, thereby damaging the cable or the receptacles
or making a bad connection.
sleeve 20 protects plug 14 from the environment and pro
vides an insulated object for a user to grasp during plugging
and unplugging. A portion of center pin 16 and a portion of
sleeve 20 are exposed for making contact with correspond
ing portions of a receptacle 30.
Receptacle 30 includes a signal terminal 32 into which
center pin 16 connects. Receptacle 30 also includes a
grounding terminal 34 into which sleeve 20 connects. In this
state, center pin 16 of plug 14 and sleeve 20 are elastically
connected to signal terminal 32 and grounding terminal 34
of receptacle 30, respectively. An electrical connection
between VCR 24 and TV 28 is created by socket connector
12 connecting with a receptacle 26 and plug 14 connecting
with receptacle 30.
OBJECTS AND SUMMARY OF THE
INVENTION
The object of the present invention is to overcome the
45
drawbacks of the prior art.
Another object of the present invention is to provide a
cable with connectors that connects devices having different
formats without having to use separate parts such as a
conversion connector or a conversion cable.
Brie?y stated, a cable connector includes a plug for
connecting a coaxial cable to an electronic device such as a
50 television or video cassette recorder. The plug includes a
sleeve that connects with a ?rst grounding terminal of a
In the PAL format, an outer diameter D of sleeve 20 of
receptacle. An outer diameter of the sleeve is dimensioned
plug 14 is a standard 9.525 mm, while in the SECAM
to provide a good unstressed interference ?t with the ?rst
format, an outer diameter D of sleeve 20 of plug 14 is a
grounding terminal. The sleeve has slits in a portion to
standard 9.0 mm. An inner diameter of grounding terminal 55 permit elastic deformation when connecting with a second
34 of receptacle 30 is also standardized to a dimension
grounding terminal having an inner diameter less than that
corresponding to an adequate elastic contact. Also, the depth
of the exposed portions of center pin 16 and sleeve 20, and
their mating parts in receptacle 30, have standardized dimen
sions.
of the ?rst grounding terminal. These slits permit the sleeve
to compress sufficiently to form an interference ?t inside the
Thus, when cable 10 is made for the PAL format, it can
second grounding terminal. When both the ?rst grounding
terminal of the receptacle and the sleeve of the plug are
dimensioned for the PAL format, and the second grounding
only connect a PAL format VCR 24 and a PAL format TV
receiver 28. A PAL format cable cannot be used to connect
terminal is dimensioned for the SECAM format, the plug ?ts
either grounding terminal.
SECAM format devices (VCR’s and TV’s) to each other nor
can it be used to connect a PAL format device to a SECAM 65
According to an embodiment of the invention, a cable
connector includes a plug for alternate connection to ?rst
format device. Likewise, when cable 10 is made for the
SECAM format, it can only connect a SECAM format VCR
and second receptacles, the ?rst and second receptacles
having ?rst and second tubular grounding terminals, respec
60
5,556,292
3
4
tively, the ?rst grounding terminal having a ?rst inner
diameter, the second grounding terminal having a second
inner diameter, the second inner diameter being smaller than
the first inner diameter, the plug having a generally tubular
sleeve for ?tting inside a grounding terminal, a chamfer at
an end. of the sleeve, a plurality of slits longitudinally
each slit 56 is approximately at the edge of the exposed
portion of sleeve 54. Very little, if any, of slits 56 overlap
insulator 18. Slits 56 are substantially entirely within the
exposed portion of sleeve 54. An outer diameter D of the
exposed portion of sleeve 54 is substantially 9.525 mm,
following the PAL format standard.
The covered portion of sleeve 54 includes at least one
disposed in the sleeve, extending through the chamfer, the
slip-prevention engagement piece 58 which protrudes from
sleeve having an unstressed outer diameter, the unstressed
sleeve 54 and engages cover 22 to help prevent cover 22
outer diameter being effective for providing an elastic inter- '
ference ?t in the ?rst inner diameter, and the chamfer and the
plurality of slits permitting the sleeve to compress to form an
interference ?t inside the second inner diameter.
The above, and other objects, features and advantages of
the present invention will become apparent from the fol
from slipping off sleeve 54 during repeated use. Two slip
prevention engagement pieces 58 are preferable (only one of
which is shown). More than two slip-prevention engagement
pieces 58 can be used evenly spaced from each other. Each
slip-prevention engagement piece 58 is formed by conven
lowing description read in conjunction with the accompa
nying drawings, in which like reference numerals designate
Referring to FIG. 3, an inner diameter N, of grounding
terminal 34 of receptacle 30 of PAL format TV 28, in
accordance with the PAL format standard, is a value smaller
tional means such as cutting and lifting.
the same elements.
than 9,525 mm by a set amount in order to ensure adequate
BRIEF DESCRIPTION OF THE DRAWINGS
20
FIG. 1 shows a perspective view of an embodiment of a
the exposed portion of sleeve 54 is substantially 9,525 mm,
following the PAL format standard. The outer edge of sleeve
54 thus elastically contacts the inner edge of grounding
connector according to the present invention.
FIG. 2 shows an elevation view of an embodiment of a
terminal 34. As with a conventional cable, cable 50 connects
PAL format TV 28 to a PAL format VCR (not shown).
cable with a connector according to the present invention.
FIG. 3 shows a fragmentary view of the connector of
FIGS. 1 and 2 ?tted to a receptacle of a PAL format TV.
FIG. 4 shows a fragmentary view of the connector of
FIGS. 1 and 2 ?tted to a receptacle of a SECAM format TV.
FIG. 5 shows a perspective view of a second embodiment
of the present invention.
FIG. 6 shows a perspective view of a third embodiment of
Referring to FIG. 4, an inner diameter N5 of grounding
terminal 40 of receptacle 38 of SECAM format TV 36, in
accordance with the SECAM format standard, is a value
smaller than 9.0 mm by a set amount in order to ensure
adequate elastic contact. As stated previously, the outer
diameter of the exposed portion of sleeve 54 is substantially
the present invention.
FIG. 7 shows a perspective view of a fourth embodiment
of the present invention.
FIG. 8 shows fragmentary elevation view of a connector
according to the prior art, in which a cable with a PAL
elastic contact. As stated previously, the outer diameter of
35
9.525 mm, following the PAL format standard. The presence
of slits 56, together with the chamfer at the end of sleeve 54,
permits elastic deformation in sleeve 54 as shown. Thus, an
elastic contact is formed between grounding terminal 40 of
connector 38 and sleeve 54 of plug 52. Thus, a PAL format
VCR (not shown) and a SECAM format TV 36 are con
nected to each other by a cable 50.
In this embodiment, four slits are formed at approxi
format connector is used to connect a PAL format VCR with
mately equal intervals along the periphery of sleeve 54 in
a PAL format TV.
40 order to provide a roughly uniform elastic deformation of
FIG. 9 shows a fragmentary elevation view of a conver
the sleeve of the plug and to provide a good elastic connec
sion connector according to the prior art, in which a cable
tion. However, the present invention is not limited to this,
with a PAL format connector is used with the conversion
and can involve slits formed at irregular intervals.
connector to connect a PAL format VCR with a SECAM
In this embodiment, cable 11 includes plug 52 a?ixed on
format TV.
45 one end, and socket connector 12 affixed on the other. In the
present invention, cable 11 includes at least one plug 52 on
DETAILED DESCRIPTION OF THE
one end. The other end can include any other connective
PREFERRED EMBODIMENT
device or be hard wired into a device. Two plugs 52, one on
each end, can also be used.
Referring to FIGS. 1 and 2, a cable 50 includes a coaxial
Sleeve 54 in this embodiment is tubular or cylindrical in
cable 11, a socket connector 12 affixed to an end of coaxial 50
shape, and has a circular cross section. The present invention
is not limited to this, and any shape cross section can be used
as long as elastic deformation of the sleeve is possible.
Referring to FIG. 5, an alternative embodiment includes
a sleeve 54 with four slits 56a. Slits 56a, unlike slits 56 of
cable 11, and a plug 52 affixed to an other end. A center pin
16 of plug 52 is electrically connected to a central conductor
(not shown) of coaxial cable 11. A sleeve 54 of plug 52 is
electrically connected to an outer conductor (not shown) of
coaxial cable 11. Sleeve 54 has a tubular shape surrounding
center pin 16 over an insulator 18. An insulating cover 22
over sleeve 54 protects plug 52 from the environment. A
portion of center pin 16 and a portion of sleeve 54 are
exposed for making physical and electrical contact with
corresponding portions of a receptacle (not shown). Four
FIG. 1, extend into the covered portion of sleeve 54 and
overlap insulator 18. In the embodiment of FIG. 1, the four
slits 56 are formed such that the closed end of each slit 56
60
slits 56 are in the exposed portion of sleeve 54. Each slit 56
5, the dosed ends of slits 56aextend over insulator 18 and
under cover 22. Increasing the length of each slit 56a
increases the ability of sleeve 54 to deform elastically when
is closed on an end toward coaxial cable 11 and open on an
other end toward the receptacle. Slits 56 are relatively
narrow and are elongated in the insertion direction of plug
52. Slits 56 preferably open wider toward a tip of sleeve 54.
The tip of sleeve 54 is chamfered to make inserting plug 52
into the receptacle (not shown) easier. The closed end of
is approximately at the edge of the exposed portion of sleeve
54. Slits 56 are substantially entirely within the exposed
portion of sleeve 54. However, in the embodiment of FIG.
65
plugged into a receptacle. All other components of plug 52
are the same as described above for the embodiment of FIG.
1.
5,556,292
5
6
Referring to FIG. 6, a further embodiment includes a
plurality of slits 56b that are open at both ends to separate
sleeve 54 into a plurality of sleeve pieces 5411 instead of a
a chamfer at an end of said sleeve;
a plurality of slits longitudinally disposed in said sleeve,
extending through said chamfer;
single sleeve 54. At least one sleeve piece 54a, and prefer
ably all sleeve pieces 54a, is electrically connected to the
outer conductor (not shown) of coaxial cable 11. Slip
prevention engagement pieces 58a are formed on each
sleeve piece 54a to engage cover 22. The full length of each
slit 56b increases the ability of sleeve pieces 54b to deform
elastically when plugged into a receptacle. In this embodi
said sleeve having an unstressed outer diameter;
said unstressed outer diameter being effective for provid
ing an elastic interference ?t in said ?rst inner diameter;
and
said chamfer and said plurality of slits permitting said
sleeve to compress to form an interference ?t inside
ment, four slits 56b are preferable. All other components of
plug 52 are the same as described above for the embodiment
said second inner diameter.
2. A cable connector according to claim 1, wherein at least
of FIG. 1.
one slit extends full length.
Referring to FIG. 7, an alternative embodiment includes
3. A cable connector according to claim 1, wherein said
a plurality of slits 56b that are open at both ends as well as 15 plurality of slits extend full length to separate said sleeve
a plurality of slits 56a that are closed at one end. If two slits
into a plurality of sleeve pieces.
56b form two sleeve pieces 54b, slip-prevention engagement
4. A cable connector according to claim 1, wherein:
pieces 58b on each sleeve piece 54b engage cover 22. In this
at least one slit extends full length; and
embodiment, two slits 56a and two slits 56b are preferable.
at least a second slit extends less than full length.
Having described preferred embodiments of the invention
5. A cable connector according to claim 1, wherein said
with reference to the accompanying drawings, it is to be
plurality of slits widen toward said charnfered end of said
understood that the invention is not limited to those precise
sleeve.
embodiments, and that various changes and modi?cations
6. A cable connector according to claim 1, further com
may be effected therein by one skilled in the art without
departing from the scope or spirit of the invention as de?ned 25 prising:
in the appended claims.
a cover on said plug; and
What is claimed is:
a portion of said sleeve extending beyond said cover.
7. A cable connector according to claim 6, wherein said
plurality of slits stop at an edge of said cover.
8. A cablev connector according to claim 6, wherein said
plurality of slits extend under an edge of said cover.
9. A cable connector according to claim 1, wherein:
1. A cable connector, comprising:
a plug for alternate connection to ?rst and second recep
tacles;
said ?rst and second receptacles having ?rst and second
tubular grounding terminals, respectively;
said ?rst grounding terminal having a ?rst inner diameter;
said second grounding terminal having a second inner
diameter;
said second inner diameter being smaller than said ?rst
inner diameter;
said plug having a generally tubular sleeve for ?tting
inside a grounding terminal;
' said ?rst inner diameter is for a ?rst format; and
35
said second inner diameter is for a second format.
10. A cable connector according to claim 9, wherein:
said ?rst inner diameter is 9,525 mm; and
said second inner diameter is 9.0 mm.
UNITED STATES PATENT AND TRADEMARK OFFICE
CERTIFICATE OF CORRECTION
PATENT N0.
:
5,556,292
DATED
:
September 17, 1996
INVENTOR(S) :
Tatsuo KATO, Katsuhiko KISHI, and Takeshi MATSUDA
It is certi?ed that errors appear in the above-identi?ed patent and that said Letters Patent is hereby
corrected as shown below:
Column 4, line 19, please change
"9,525" to --9.525--;
Column 4, line 21, please change
"9,525" to --9.525--;
Column 4, line 62, please change
"dosed" to --closed--;
Column 4, line 62, please change
"Séaextend" to --56a extend--;
Column 6, line 37, please chnage
"9,525" to ——9.525—-.
Signed and Sealed this
Twenty-third Day of September, 1997
Altest:
60144 W
BRUCE LEHMAN
Arresting 017k?!’
Cummiazs‘imler nf Pulemx mlzl 'I'rmh'murkx
Was this manual useful for you? yes no
Thank you for your participation!

* Your assessment is very important for improving the work of artificial intelligence, which forms the content of this project

Download PDF

advertisement