Electrical connectors – Including or for use with coaxial cable
Reexamination Certificate
2000-04-27
2003-06-10
Luebke, Renee (Department: 2833)
Electrical connectors
Including or for use with coaxial cable
C439S583000, C439S585000
Reexamination Certificate
active
06575784
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a connector for a shielded wire. More particularly, the present invention relates to a connector capable of facilitating processing of an end portion of a shielded wire.
The present application is based on Japanese Patent Application No. Hei. 11-120213, which is incorporated herein by reference.
2. Description of the Related Art
As shown in
FIGS. 6 and 7
, a shielded wire
60
comprises a conductor
61
, an insulating layer
62
for coating the conductor
61
, a braided conducting shield
63
for covering the insulating layer
62
, and an insulating sheath
64
for covering the braided conducting shield
63
.
A related connector
70
, connected to an end portion of the shielded wire
60
, comprises a cylindrical main body
71
, a connection portion
72
formed at one end portion of the main body
71
(the left side of FIGS.
6
and
7
), a clamp
73
to be inserted into the main body
71
from the other side thereof (i.e., the right side of the main body
71
), a gasket
74
, a washer
75
, and a clamp
76
.
The main body
71
is made of an appropriate metal capable of establishing conduction with the braided conducting shield
63
, and a rib
77
is formed along the interior circumferential surface of the main body
71
so as to extend in the radial direction. Further, an insulating sleeve
78
is provided between the rib
77
and the connection portion
72
.
The connection portion
72
is formed into a cylindrical shape, is concentrically rotatable relatively to the main body
71
, and is to be connected to a connection portion of another connector or that of predetermined equipment, by way of a female thread
79
formed along the interior circumferential surface of the connection portion
72
.
The clamp
73
is formed into a stepped cylindrical shape, and each of the gasket
74
and the washer
75
is essentially formed into a disk-like shape of predetermined thickness. The clamp
73
, the gasket
74
, and the washer
75
are retained within the main body
71
while being stacked, by screw-engaging the substantially-cylindrical outer peripheral surface of the clamp
76
with the interior surface of the main body
71
.
In order to connect the end portion of the shielded wire
60
to the connector
70
, the conductor
61
is exposed a predetermined length in advance from the shielded wire
60
, and then a center contact
65
is soldered to the exposed end portion of the conductor
61
. Further, the shielded wire
60
is axially passed through the clamp
73
, the gasket
74
, and the washer
75
.
Next, the braided conducting shield
63
is folded back such that the insulating layer
62
is exposed a predetermined length, and the clamp
73
is interposed between the leading end portion of the braided conducting shield
63
and the insulating sheath
64
as shown in FIG.
6
.
Finally, the center contact
65
is axially inserted into the insulating sleeve
78
from one end portion of the main body
71
, to thereby protrude from the connection portion
72
. Further, the clamp
76
is screw-engaged with the main body
71
, wherewith the end portion of the shielded wire
60
is fixedly pressed into the main body
71
by way of the clamp
73
, the gasket
74
, and the washer
75
such that the end portion of the insulating layer
62
and a folded-back portion
66
of the braided conducting shield
63
abut against a rib
77
of the main body
71
, thereby connecting the end portion of the shielded wire
60
with the connector
70
as shown in FIG.
7
.
In the meantime, connecting the connector
70
with the shielded wire
60
may involve a troublesome operation, because it is necessary to complicatedly treat the end portion of the shielded wire
60
after axially inserting in advance the end portion of the shielded wire
60
into the clamp
73
, the gasket
74
, the washer
75
, and the clamp
76
, and further, it is necessary to fixedly press the end portion of the shielded wire
60
into the main body
71
by way of a plurality of components.
In particular, the connector
70
is usually shipped and transported after individual components of the connector
70
are assembled into a single assembly. However, when the connector
70
is connected to the end portion of the shielded wire
60
, the connector
70
has to be re-assembled after having been disassembled into individual components. Accordingly, double assembling operations are needed.
Further, since the connector
70
requires many components of comparatively high precision, a high manufacturing cost may be required.
SUMMARY OF THE INVENTION
The present invention has been conceived in light of the foregoing drawbacks. An object of the present invention is to provide a connector simplifying treatment of the end portion of a shielded wire and reducing the number of components.
To achieve the above object, according to the first aspect of the present invention, there is provided a connector connectable to an end portion of a shielded wire which includes a conductor, an insulating layer coating the conductor, a braided conducting shield covering the insulating layer, and an insulating sheath covering the braided conducting shield, the connector allowing axial insertion of the conductor of the shielded wire while insulating the conductor, the connector comprising a cylindrical main body insertable between the braided conducting shield and the insulating sheath in a longitudinal direction of the shielded wire so as to electrically connect to the braided conducting shield, a connection portion provided at a base end portion of the main body in an inserting direction in which the main body is inserted between the braided conducting shield and the insulating sheath, and a main-body-diameter reducing mechanism for reducing a diameter of a leading end portion of the main body in the inserting direction thereof.
Herein, as the structure of the main body for ensuring conduction with the braided conducting shield and insulation of the conductor, there may be employed a structure for causing a conductor to axially pass through the main body without involving a contact with the main body by setting the minimum internal diameter of the main body to be greater than the external diameter of the conductor, or a structure for causing a conductor to axially pass through the main body by setting the internal diameter of the main body to be greater than the diameter of the insulating layer.
There may also be employed a structure for fitting the insulating sleeve along the interior circumferential surface of an insertion hole through which the conductor is axially passed.
In the connector having the foregoing structure, the diameter of the main body inserted between the braided conducting shield and the insulating sheath is reduced, and therefore, the main body holds the braided conducting shield. Accordingly the connector can be connected with the end portion of the shielded wire.
More specifically, the connector of the present invention eliminates the necessity of complicated preliminary operations, which would have been required by the related connector. In contrast with the related connector, the connector of the present invention can reduce the number of components, and does not require a high precision to the components.
Accordingly, in comparison with the related connector, the connector of the present invention can simplify the operations required for connecting the end portion of the shielded wire to the braided-shield connector, and therefore, the manufacturing costs are reduced.
Further, according to the second aspect of the present invention, it is preferable that the main-body-diameter reducing mechanism includes at least one main body slit formed in the main body so as to extend from the leading end portion of the main body to a predetermined position in a longitudinal direction of the main body, and a main body nut formed on an exterior surface of the main body, and wherein the main body and the main body nut are brought into contact with each other
Luebke Renee
McCamey Ann
Yazaki -Corporation
LandOfFree
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