Electrical connectors – With insulation other than conductor sheath – Plural-contact coupling part
Reexamination Certificate
2002-04-16
2003-11-18
Vu, Hien (Department: 2833)
Electrical connectors
With insulation other than conductor sheath
Plural-contact coupling part
C439S752000, C439S942000
Reexamination Certificate
active
06648697
ABSTRACT:
BACKGROUND OF THE INVENTION
The present invention relates to a connector, and more particularly to a connector having individually isolated terminals to eliminate mutual interference between the terminals during high-speed signal transmission and therefore enable faster and more stable transmission of signals.
With the increasingly developed technologies, computers have been designed to provide incredibly powerful functions. That is, the central processing unit (CPU) inside each computer has a higher operation capability than ever. Meanwhile, the Internet has become so popular that upload uploading and downloading at extremely high speed speeds, via wide-band optical fibers, asymmetric digital subscriber line (ADSL) and the like has been developed in response to user demands. Thus, peripheral Active/passive components for using the Internet must be matched to the high operating speeds. A cable for transmitting signals between the CPU of a computer and the Active/passive components is therefore particularly important, and connectors at two ends of the cable are responsible for successful high-speed signal transmission.
FIGS. 1 and 2
are exploded and partially assembled perspective views, respectively, of a conventional connector. As shown, the conventional connector includes a metal case
4
, a plastic body
1
, an insertion plate
2
, two hold-down plates
3
. The metal case
4
is put onto an outer portion of a front end of the plastic body
1
, and insertion plate
2
is connected to the rear end of the plastic body
1
.
Two rows of staggered terminals
11
are provided at upper and lower sides of the plastic body
1
. The plastic body
1
includes two rearwardly extended lateral walls
12
, inner surfaces of which are provided with two guide ways
13
. Each guideway
13
has a retaining hole
14
provided therein, such that the insertion plate
2
can be connected to a rear side of the plastic body
1
by sliding it into the guide ways
13
. Moreover, the two lateral walls
12
have two vertically extended insertion slots
15
symmetrically provided at their inner surfaces.
The insertion plate
2
is provided at two lateral sides with two retaining projections
22
for engaging with the retaining holes
14
in the guide ways
13
on the plastic body
1
, so as to hold the insertion plate
2
to the rear side of the plastic body
1
. The insertion plate
2
is also provided at its upper and lower surfaces with a plurality of terminal slots
21
corresponding to the terminals
11
. When the insertion plate
2
is connected to the rear side of the plastic body
1
, rear ends of the terminals
11
are located in corresponding terminal slots
21
on the insertion plate
2
. Rear ends of the terminal slots
21
are spaced from one another with spacing ribs
23
. Middle portions of the spacing ribs
23
at both upper and lower sides of the insertion plate
2
are cut away to provide two transversely extended recesses
24
. And, two vertically extended slots
25
are provided at two lateral sides of the insertion plate
2
corresponding to the insertion slots
15
on the plastic body
1
.
Each of the hold-down plates
3
is provided at middle points of two lateral sides with two projections
31
. The hold-down plates
3
are provided at a front part of one side facing the insertion plate
2
with a plurality of hold-down ribs
32
corresponding to and adapted to be located in the terminal slots
21
. The projections
31
may be vertically guided into the insertion slots
15
to connect the hold-down plates
3
to the plastic body
1
and to be separately located at upper and lower sides of the insertion plate
2
.
Each of the interconnecting cables
5
includes a plurality of conducting wire
51
that are arranged in a predetermined manner corresponding to the terminals
11
, and a transverse clamp plate
53
holding the previously arranged conducting wire
51
in place. A fixed length of front ends of the conducting wire
51
is extended from a front side of the clamp plate
53
to expose a fixed length of bare wires
52
.
To assemble the above-described conventional connector, the insertion plate
2
is first connected to the rear side of the plastic body
1
, and then G the clamp plates
53
of the cables
5
are set in the recesses
24
at upper and lower sides of the insertion plate
2
, as shown in
FIG. 2
, such that the conducting wires
51
are separately located in and between two adjacent spacing ribs
23
with the bare wires
52
pressed against rear ends of corresponding terminals
11
. Thereafter, the two hold-down plates
3
are connected to the plastic body
1
to be separately located at upper and lower sides of the insertion plate
2
, by guiding the projections
31
into the insertion slots
15
to engage with the slots
25
. After the hold-down plates
3
are held in place, the pressed ribs
32
provided at the front part of the hold-down plates
3
are separately located in corresponding terminal slots
21
. Finally, rear parts of the hold-down plates
3
are integrally connected to tops of the spacing ribs
23
, and the pressed ribs
32
at the front parts of the hold-down plates
3
are integrally connected at two lateral sides to two lateral sides of corresponding terminal slots
21
by way of high-frequency heat sealing, as shown in FIG.
3
. The metal case
4
is then put onto the of front end of the plastic body
1
to complete the connector.
Please refer to FIG.
4
. This figure is a sectional view taken along line A-A′ of FIG.
3
. After the rear parts of the hold-down plates
3
are integrally connected to the tops of the spacing ribs
23
, and the pressed ribs
32
at the front parts of the hold-down plates
3
are integrally connected at two lateral sides to two lateral sides of corresponding terminal slots
21
, the bare wires
52
are separately located in individual terminal slots
21
to tightly contact with rear ends of corresponding terminals
11
, such that short circuit at joints of the bare wires
52
and the terminals
11
can be eliminated.
The following disadvantages are found in the above-described conventional connector:
1. When signals are transmitted at high speed via the closely arranged terminals, electric energy on the terminals produces radiation resulting in mutual interference of the terminals with one another and accordingly slow and unstable signal transmission.
2. During high-speed transmission, electric energy on the connector produces radiation to form noise or crosstalk that interferes with other terminals, resulting in a poor signal transmission.
3. The terminals might have static electricity surrounded them due to external factors that affect the connector. Such static electricity forms an interference source in the signal transmission.
It is therefore desirable to develop an improved connector having individually isolated terminals to eliminate mutual interference of terminals with one another during high-speed signal transmission and enable faster and more stable transmission of signals.
SUMMARY OF THE INVENTION
A primary object of the present invention is to provide a connector having individually isolated terminals, so that the terminals do not mutually interfere with one another during high-speed signal transmission, in order to enable faster and more stable transmission of signals.
Another object of the present invention is to provide a connector that has reduced noise or crosstalk produced during high-speed transmission, so that signals-can be more stably transmitted.
A further object of the present invention is to provide a connector that eliminates static electricity possibly produced around terminals and therefore prevents the signal transmission from being interfered by static electricity.
To achieve the above and other objects, the connector of the present invention mainly includes a plastic body having a steel case put over a front end thereof, an insertion plate connected to a rear end of the plastic body, an interconnecting cable including two rows of conducting wire separately set onto upper rear
All Best Electronics Co., Ltd.
Vu Hien
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