Information
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Patent Grant
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6265668
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Patent Number
6,265,668
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Date Filed
Monday, July 19, 199925 years ago
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Date Issued
Tuesday, July 24, 200123 years ago
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Inventors
-
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Examiners
Agents
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CPC
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US Classifications
Field of Search
US
- 439 447
- 439 448
- 439 445
- 174 135
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International Classifications
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Abstract
A protecting device for a plug is disclosed. The plug has a lead-out line electrically connected with a conductive wire. The conductive wire is enclosed by a cladding. A spiral ribbon is arranged on the outer surface of the conductive wire and on the junction between the lead-out line of the plug and the conductive wire. The spiral ribbon can provide smooth bending of the conductive wire when the conductive wire is pulled in arbitrary direction and prevent the breaking of the copper coil within the conductive wire.
Description
FIELD OF THE INVENTION
The present invention relates to a protecting device for plug, especially to a protecting device for the lead-out line of various plug, whereby the accuracy of test and the endurance of the plug are enhanced.
BACKGROUND OF THE INVENTION
FIGS. 1 and 2
show a conventional protecting device of the lead-out line
11
a
of a plug
10
a
. The lead-out line
11
a
of the plug
10
a
is electrically connected to a conductive wire
12
a
. To prevent the over-bending on the junction of the lead-out line
11
a
of the plug
10
a
and the conductive wire
12
a
, a protecting device composed of circular ribbons
14
a
and axial ribbons
15
a
are provided on the outer surface of the cladding over the part of the conductive wire
12
a
in connection with the lead-out line
11
a
of the plug
10
a
. As shown in
FIG. 2
, the circular ribbons
14
a
and axial ribbons
15
a
can prevent over-bending of the junction between the lead-out line
11
a
of the plug
10
a
and the conductive wire
12
a
, when the lead-out line
1
a is bent with respect to the conductive wire
12
a.
However, as shown in
FIG. 2
, a sharp curve is easy to form on portion
16
a
of the conductive wire
12
a
adjoining to the protecting device when the conductive wire
12
a
is pulled out. The copper coil of the conductive wire
12
a
in the portion
16
a
is liable to break due to the sharp curve, thus reducing the endurance of the conductive wire
12
a
and the plug
10
a.
It is the primary object of the present invention to provide a protecting device for the lead-out line of various plugs, whereby the accuracy of test and the durability of the plug are enhanced.
To achieve the above object, the present invention provides a spiral ribbon as protecting means around the cladding on the junction of the lead-out line and the conductive wire, the spiral ribbon keeping the smooth bending of the conductive wire and preventing the breakage of the upper coil within the conductive wire. the spiral ribbon can prevent the forming of sharp bending between the lead-out line of the plug and the conductive wire when the conductive wire is pulled out. Therefore, the accuracy of test and the endurance of the plug are enhanced.
The various objects and advantages of the present invention will be more readily understood from the following detailed description when read in conjunction with the appended drawing, in which:
BRIEF DESCRIPTION OF DRAWING
FIG. 1
is a perspective view of the lead-out line of a conventional plug in bending state;
FIG. 2
is a cross section view of the lead-out line of a conventional plug in bending state;
FIG. 3
is the perspective view of the first preferred embodiment according to the present invention;
FIG. 4
is the perspective view of the first preferred embodiment according to the present invention in bending state;
FIG. 5
is the cross section view of the first preferred embodiment according to the present invention in bending state;
FIG. 6
is the perspective view of the second preferred embodiment according to the present invention; and
FIG. 7
is the perspective view of the third preferred embodiment according to the present invention.
DETAIL DESCRIPTION OF PREFERRED EMBODIMENT
As shown in
FIG. 3
, the present invention provides a protecting device of the lead-out line
11
of plug
10
. The plug
10
can be of various type as that shown in FIG.
6
and the plug for multi-purpose meter as shown in FIG.
7
. The rear side of the plug
10
is connected with a lead-out line
11
, which is electrically connected to a conductive wire
12
. The outer surface of the conductive wire
12
is enclosed by a cladding
13
made of insulating material. The conductive wire
12
includes copper coil therein (not shown). The present invention is characterized in that a spiral ribbon
14
is provided on the outer surface of the cladding
13
to provide a protecting means for the plug
10
. More particularly, the spiral ribbon
14
is arranged on the junction between the lead-out line
11
of the plug
10
and the conductive wire
12
, and is preferably formed integrally on the conductive wire
12
. Moreover, the spiral ribbon
14
can also be mounted with the conductive wire
12
by assembling.
As shown in
FIGS. 4 and 5
, the spiral ribbon
14
can prevent the over bending of the conductive wire
12
or the sharp edge forming of the conductive wire
12
when the junction between the lead-out line
11
of the plug
10
and the conductive wire
12
is bent due to pulling force acted on the conductive wire
12
. The spiral ribbon
14
can uniformly absorb the pulling force acted on the conductive wire
12
such that a smooth bending portion is formed on the junction of the lead-out line
11
of the plug
10
and the conductive wire
12
, even though the conductive wire
12
is pulled. Therefore, a sharp bending will not be formed on the end
15
of the conductive wire
12
in connection with the spiral ribbon
14
, and the copper coil within the conductive wire
12
has not the risk of breaking. The accuracy of test and the endurance of the plug are enhanced.
To sum up, the present invention provides a protecting device of the lead-out line of plug, which can prevent the sharp edge formed on the junction of the lead-out line and the conductive wire, whereby the accuracy of test and the endurance of the plug are enhanced.
Although the present invention has been described with reference to the preferred embodiment thereof, it will be understood that the invention is not limited to the details thereof. Various substitutions and modifications have suggested in the foregoing description, and other will occur to those of ordinary skill in the art. Therefore, all such substitutions and modifications are intended to be embraced within the scope of the invention as defined in the appended claims.
Claims
- 1. A protectively reinforced plug assembly comprising:(a) a plug having a lead out line portion; (b) an axially extended conductive wire member electrically coupled to said lead out line portion of said plug, said conductive wire member having an outer cladding; (c) a spiral ribbon formed integrally on at least a portion of said cladding of said conductive wire member to extend coaxially thereabout adjacent said plug lead out line portion, said spiral ribbon protectively accommodating flexible deflection of said conductive wire.
US Referenced Citations (5)