Protecting device for plug

Details Protecting device for plug Protecting device for plug

1999-07-19

2001-07-24

Riley, Shawn (Department: 2838)

Electricity: conductors and insulators

Conduits, cables or conductors

Accessories

C439S447000

Reexamination Certificate

active

06265668

ABSTRACT:

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:


REFERENCES:
patent: 2727088 (1955-12-01), Wall
patent: 3395244 (1968-07-01), Koehler
patent: 3800068 (1974-03-01), Torgerson
patent: 5823817 (1998-10-01), Pyle
patent: 5874709 (1999-02-01), New et al.

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