Electrical connectors – Including or for use with coaxial cable
Reexamination Certificate
2001-08-28
2002-06-11
Patel, Tulsidas (Department: 2839)
Electrical connectors
Including or for use with coaxial cable
C029S828000, C029S861000
Reexamination Certificate
active
06402551
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to an end structure for a high-frequency coaxial connector required to be electro-magnetically insulated from the outside and also relates to a method of treating the end of the hight-frequency coaxial connector.
2. Description of the Related Art
Japanese Utility Model Publication (kokai) No. 4-52371 discloses a high-frequency coaxial connector.
FIG. 1
is a perspective view of the above coaxial connector and
FIG. 2
is a sectional view of the connector.
As shown in
FIGS. 1 and 2
, a shield wire
1
is provided with a core line
1
a
, an insulating inner rind
1
b
, and a braided wire
1
c
all of which are exposed from an insulating outer rind
1
d
at the end of the wire
1
. A rod-shaped terminal
2
is press-fitted to the exposed core
1
a
. A shield member
3
includes a terminal retainer
3
a
in the form of a rectangular box, and a pair of shield pieces
3
b
,
3
c
connected with the terminal retainer
3
a
through a hinge
4
. A terminal insertion hole
5
is formed in the terminal retainer
3
a
. The terminal
2
is adapted so as to be connected with the shield wire
1
and inserted into the terminal inserting hole
5
.
The pair of shield pieces
3
b
,
3
c
are formed so as to be displaceable from an opening position for opening their abutting faces to the closing position for abutting the abutting faces against each other. Each of the shield pieces
3
b
,
3
c
is provided, on an end face thereof, with a contact face
6
for contact with the braided wire
1
c
of the shield wire
1
.
With the above-mentioned constitution, the terminal
2
connected to the shield wire
1
is inserted into the shield member
3
through an opening between the shield pieces
3
b
,
3
c
and further inserted into the terminal insertion hole
5
. Next, the pair of shield pieces
3
b
,
3
c
are closed, so that the abutting faces abut on each outer while the respective contact faces
6
come in contact with the braided wire
1
c
. Consequently, the terminal
2
is electrically connected with the shield member
3
, while the terminal
2
and the exposed tore
1
a
are magnetically insulated from the outside by the shield member
3
.
Japanese Patent Publication (kokai) No. 7-22107 discloses a high-frequency coaxial connector.
FIG. 3
is a sectional view of the above coaxial connector before assembling an insulating member and
FIG. 4
is a sectional view of the connector after assembling the member.
As shown in
FIGS. 3 and 4
, a shield wire
1
′ is provided with the core line
1
a
, the insulating inner rind
1
b
, and the braided wire
1
c
all of which are exposed from the insulating outer rind
1
d
at the end of the wire
1
. An inner terminal
2
′ is electrically connected to the exposed core
1
a
. A shield terminal
7
includes a retainer
7
a
in the form of a rectangular cylinder, a “braided wire” press-fitting part
7
b
extended from the rear end of the retainer
7
a
and a “insulating rind” press-fitting part
7
c
succeeding to the part
7
b
. In the rectangular cylindrical retainer
7
a
, an inner housing
8
is arranged to accommodate the terminal and provided with a groove part
8
a
. Respective openings
7
d
,
8
d
are formed on the retainer
7
a
and the top face of the inner housing
8
, respectively. The openings
7
d
,
8
d
are adapted so as to be covered with a covering member
9
.
With the above-mentioned constitution, the inner terminal
2
′ connected to the shield wire
1
′ is inserted into the groove part a of the inner housing
8
through the respective opening
7
d
of the terminal
7
and the opening
8
d
of the inner housing
8
. Next, the covering member
9
is attached to the inner housing
8
to close the opening
8
d
. Further, by crimping the press-fitting parts
7
b
,
7
c
, the press-fitting part
3
b
is pressure-connected to the braided wire
1
c
while the press-fitting part
7
c
is pressure-connected to the insulating outer rind
1
d
. In this manner, the inner terminal
2
′ is electrically connected with the shield terminal
7
, while the terminal
2
′ and the exposed core Ic are magnetically insulated from the outside by the shield terminal
7
, similar to the previously-mentioned prior art.
In the former prior art, however, there is a problem of incomplete assembly with the result being that the pair of shield pieces
3
b
,
3
c
are easily deformed by an external force in a direction to separate the pieces
3
b
,
3
c
from each other because the contact between the respective faces
6
and the braided wire
1
c
of the shield wire
1
is attained owing to the plastic deformation of the shield pieces
3
b
,
3
c
of the shield member
3
. In detail, if the shield pieces
3
b
,
3
e
are subjected to an external force to open them, then there is easily produced a clearance between the opposing faces of the shield pieces
3
b
,
3
c
, so that a electrical contact between the faces
6
and the braided wire
14
becomes incomplete, thereby deteriorating the shielding capability.
In the latter prior art, conversely, the assembling condition is stable owing to the arrangement where the shield terminal
7
is connected to the shield wire
1
′ through the press-fitting part
3
b
for the braided wire
1
c
and the press-fitting part
7
c
for the insulating out rind
1
d
. However, since the rear opening d. of the shield terminal
7
and the rear opening d. of the inner housing
8
are respectively closed by the covering member
9
, the number of components is so large that the number of assembly steps is increased, causing an increase in manufacturing costs, Additionally noted, unless the opening d., d. are closed by the covering opening
9
, the shielding capability would be deteriorated in a high-frequency band range, particularly.
SUMMARY OF THE INVENTION
Under such a circumstance, it is therefore an object of the present invention to provide an end structure for a coaxial connector which is complete in its assembling condition and capable of maintaining the shielding capability without increasing the number of components and assembling steps.
Further, it is another object to provide a method of treating the end of the coaxial connector.
The objects of the present invention described above can be accomplished by an end structure for a coaxial connector comprising:
a shield wire having a conductive core, an insulating inner rind covering the core, a conductive braided wire covering the insulating inner rind and an insulating outer rind covering the braided wire, the shield wire being partially peeled at an end thereof so as to expose the core, the insulating inner rind and the braided wire;
an inner terminal to be press-fitted to the exposed core for electrical connection;
an inner housing made of insulating material, the inner housing having an inner terminal accommodating part formed for accommodating the inner terminal inserted thereinto;
a shield terminal to be assembled to the inner terminal and the exposed braided wire through the inner housing so as to attain an electrical connection with the braided wire, the shield terminal being configured to be connectable with the exposed braided wire by the shield terminal's press-fitting so as to cover at least the inner terminal and the exposed insulating inner rind;
wherein the shield terminal includes:
a bottom part;
a pair of half-box parts formed to stand on both sides of the bottom part integrally and allow of plastic deformation due to press-fitting to their closing position where respective opposing end faces of the half-box parts butt each other; and
a pair of press-fitting parts formed to stand on both sides of the bottom part and also configured to be connectable with the exposed braided wire by the press-fitting parts press-fitting;
whereby the inner housing, the inner terminal and the exposed braided wire's part on the insulating inner rind's side are covered with the pair of half-box parts being deformed to their closing position, while the e
Oblon, Spivak, McClelland, Maier & Neustandt P.C.
Patel Tulsidas
Yazaki -Corporation
LandOfFree
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