FIELD OF THE INVENTION
[0001] The present invention relates to power plugs, and more particularly, to a power plug
for preventing quality deterioration of power supplied through the power plug.
BACKGROUND OF THE INVENTION
[0002] Recently, in the realm of audio equipment, much attention and concern are directed
toward influence of power supply on audio quality, or timbre deterioration caused
by instability of current passing through the audio equipment.
[0003] In response to the above problems, a power plug having stronger mechanical strength
and stability is applied to the audio equipment, wherein joints or terminals of the
power plug are preferably made for reducing electrical resistance of current flow;
this desirably improves timbre, resolution and other critical properties of the audio
equipment.
[0004] However, in order to enhance mechanical strength and stability, the foregoing power
plug is internally provided with a plurality of metallic screws. When current from
a power supply flows inside the power plug, a magnetic field produced by the current
flow induces variation in internal electron energy levels of metal atoms of the metallic
screws that are located nearby the current flow, whereby part of electrons in the
metal atoms are ionized, and generates an electron flow inside the metallic screws.
This electron flow accordingly produces a magnetic field, which interferes with stability
of the current flow from the power supply, thereby leading to timbre deterioration
of the audio equipment in operation of the power plug, so that satisfactory audio
quality still cannot be achieved.
SUMMARY OF THE INVENTION
[0005] A primary objective of the present invention is to provide a power plug, in which
a ground mechanism can prevent the occurrence of electron ionization in the power
plug, allowing stability of current flowing through the power plug to be effectively
assured.
[0006] In accordance with the foregoing and other objectives, the present invention proposes
a power plug, comprising: a terminal base having at least one conductive terminal
and a ground terminal; an electric wire having core wires connected to the conductive
terminal and the ground terminal, respectively; a cover integrally connected to the
terminal base by a plurality of first screws; and a ground mechanism having a conductive
member for connecting the first screws to the ground terminal, allowing the first
screws to be grounded. The conductive member of the ground mechanism is a copper plate,
wherein a central portion of the copper plate is connected to the ground terminal,
and two ends thereof can respectively extend to come into contact with the first screws.
[0007] Further, the conductive terminal and ground terminal of the terminal base can be
in the form of a male or female power plug.
[0008] In another embodiment, the power plug of the invention further comprises a wire fixing
mechanism installed in the cover, which wire fixing mechanism includes a press board
positioned at where the electric wire passes thereby, and a clamping member underneath
the press board; and two second screws respectively penetrating through the cover
and screwed at two ends of the press board. The ground mechanism includes a first
conductive member for connecting the first screws to the ground terminal, allowing
the first screws to be grounded; a second conductive member for interconnecting the
two second screws; and a third conductive member for connecting the first screws to
the second conductive member, so as to ground the second screws via the second conductive
member and the first screws. A central portion of the first conductive member is connected
to the ground terminal, and two ends thereof can respectively extend to come into
contact with the first screws. The second conductive member is a copper plate, and
capable of extending to come into contact with the second screws, respectively. And,
the second conductive member has a central portion thereof being exposed to one screw
hole for allowing one of the first screws to be screwed therein; the third conductive
member is a metallic spring installed in this screw hole, and is pressed when the
first screw is screwed into the screw hole, in a manner that one end of the metallic
spring abuts against the first screw, and the other end of the metallic spring adjoins
the central portion of the second conductive member.
[0009] In a further embodiment, the power plug of the invention comprises: a terminal base
having at least one conductive terminal and a ground terminal; an electric wire having
core wires connected to the conductive terminal and the ground terminal, respectively;
two covers integrally connected to the terminal base by a plurality of screws, and
capable of being coupled to each other for enclosing the conductive terminal and the
ground terminal therein; and a ground mechanism having a conductive member for connecting
the screws to the ground terminal, allowing the screws to be grounded. The conductive
member of the ground mechanism is a copper plate provided on an inner wall of one
of the covers, wherein one end of the copper plate extends toward the ground terminal,
and can be pressed to abut against the ground terminal when the two covers are coupled
to each other, whereas the other end of the copper plate extends to screw holes, allowing
the screws to be respectively screwed into the screw holes and come into contact with
the copper plate.
[0010] In a further embodiment, the power plug of the invention comprises: a terminal base
having at least one conductive terminal; an electric wire having core wires connected
to the conductive terminal and a ground terminal, respectively; a cover integrally
connected to the terminal base by a plurality of screws; a ground wire having one
end thereof being connected to the ground terminal, and the other end thereof extending
to outside of the power plug and connected to an external ground device; and a ground
mechanism for connecting the screws to the ground terminal of the ground wire, allowing
the screws to be grounded.
BRIEF DESCRIPTION OF THE DRAWINGS
[0011] The present invention can be readily understood by the following detailed description
of the preferred embodiment, with reference made to the accompanying drawings, wherein:
FIG. 1 is a perspective schematic diagram of a power plug of a first preferred embodiment
of the invention;
FIG. 2 is a perspective dissection diagram showing a terminal base with a ground mechanism
in a power plug of a first preferred embodiment of the invention;
FIG. 3 is a cross-sectional view of a terminal base with a ground mechanism in a power
plug of a first preferred embodiment of the invention;
FIG. 4 is a cross-sectional view of an upper part of a cover in a power plug of a
first preferred embodiment of the invention;
FIG. 5 is a perspective dissection diagram showing another example of a terminal base
with a ground mechanism in a power plug of a first preferred embodiment of the invention;
FIG. 6 is a top view of a power plug of a second preferred embodiment of the invention;
FIG. 7 is a side view of a power plug of a second preferred embodiment of the invention;
FIG. 8 is a front view of a power plug of a second preferred embodiment of the invention;
FIG. 9 is a back view of a power plug of a second preferred embodiment of the invention;
FIG. 10 is a perspective structural diagram showing an unassembled power plug of a
second preferred embodiment of the invention;
FIG. 11 is a top view of a power plug of a third preferred embodiment of the invention;
and
FIG. 12 is a cross-sectional view of a power plug of a third preferred embodiment
of the invention.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
First Preferred Embodiment
[0012] Illustrated in FIG. 1 is a perspective schematic diagram of a power plug of a first
embodiment of the present invention. As shown in the drawing, the power plug 1 comprises
a terminal base 10 having two conductive terminals 100 and a ground terminal 101;
an electric wire 11 having core wires connected to the conductive terminals 100 and
the ground terminal 101, respectively; a cover 12 integrally connected to the terminal
base 10 by a plurality of first screws 102; and a ground mechanism 13 for connecting
the first screws 102 to the ground terminal 101, allowing the first screws 102 to
be grounded.
[0013] FIG. 2 illustrates a perspective dissection diagram of a terminal base with a ground
mechanism in the power plug of the first embodiment of the invention; FIG. 3 illustrates
a cross-sectional view of a terminal base with a ground mechanism in the power plug
of the first embodiment of the invention. Referring to FIGs. 1, 2 and 3, the ground
mechanism 13 includes a first conductive member 130 such as a copper plate for connecting
the first screws 102 to the ground terminal 101. One end of the copper plate 130 is
associated with the ground terminal 101, and the other end thereof extends to screw
holes 1020 for allowing the first screws 102 to penetrate therethrough. This makes
the first screws 102 come into contact with the copper plate 130 when being screwed
into the screw holes 1020.
[0014] Furthermore, two of the first screws 102 are provided in the power plug 1. The first
conductive member 130 is an approximately M-shaped copper plate, wherein a central
portion of the copper plate 130 is connected to the ground terminal 101, and two ends
thereof respectively extend to two screw holes 1020 where the first screws 102 can
penetrate therethrough, so as to allow the first screws 102 to respectively screwed
into the screw holes 1020 and come into contact with the copper plate 130.
[0015] Moreover, the conductive terminals 100 and the ground terminal 101 of the terminal
base 10 are in the form of a female power plug.
[0016] FIG. 4 illustrates a cross-sectional view of an upper part of a cover in the power
plug of the first embodiment of the invention. Referring to FIGs. 2, 3 and 4, the
power plug 1 further comprises: a wire fixing mechanism 14 installed in the cover
12, and two second screws 15. The wire fixing mechanism 14 includes a press board
140 positioned at where the electric wire 11 passes thereby, and a clamping member
141 underneath the press board 140. The two second screws 15 penetrate through the
cover 12 and are screwed at two ends of the press board 140, respectively. By screwing
tight the second screws 15, the press board 140 can be moved toward an inner wall
of the cover 12, allowing the electric wire 11 to be fixed and abut against the inner
wall of the cover 12, and to be firmly clamped by the clamping member 141.
[0017] Besides the above first conductive member 130 for allowing the first screws 102 to
be grounded, the ground mechanism 13 further includes a second conductive member 131
for interconnecting the two second screws 15; and a third conductive member 132 for
connecting the first screws 102 to the second conductive member 131, allowing the
second screws 15 to be grounded via the second conductive member 131 and the first
screws 102.
[0018] The second conductive member 131 is a copper plate, two ends of which copper plate
131 respectively extend to second screw holes 150 for allowing the two second screws
15 to penetrate therethrough. This makes the second screws 15 comes into contact with
the copper plate 131 when being screwed into the second screw holes 150.
[0019] A central portion of the second conductive member 131 is exposed to one of the first
screw holes 1020 used for screwing the first screws 102 therein. The third conductive
member 132 is a metallic spring installed in the first screw hole 1020. When one of
the first screws 102 is screwed into the first screw hole 1020, the metallic spring
132 is pressed, making one end thereof abut against the first screw 102, and the other
end of the metallic spring 132 adjoin the central portion of the second conductive
member 131.
[0020] FIG. 5 is a perspective dissection diagram showing another example of a terminal
base with a ground mechanism in the power plug of the first embodiment of the invention.
As shown in the drawing, besides the above-mentioned female power plug, the conductive
terminals 100 and the ground terminal 101 of the terminal base 10 can also be in the
form of a male power plug.
Second Preferred Embodiment
[0021] FIGs. 6, 7, 8 and 9 are respectively a top view, a side view, a front view and a
back view of a power plug of a second embodiment of the invention; FIG. 10 is a perspective
structural diagram showing an unassembled power plug of the second embodiment of the
invention. Referring to FIGs. 6 to 10, the power plug 2 of this embodiment comprises:
a terminal base 20 having two conductive terminals 200 and a ground terminal 201;
an electric wire 21 having core wires connected to the conductive terminals 200 and
the ground terminal 201, respectively; two covers 22 integrally connected to the terminal
base 20, which two covers 22 are capable of being coupled to each other by means of
screws 24, so as to enclose the conductive terminals 200 and the ground terminal 201
therein; and a ground mechanism 23 for connecting the screws 24 to the ground terminal
201, so as to ground the screws 24.
[0022] Furthermore, the ground mechanism 23 includes a conductive member 230 for interconnecting
the first screws 24 and the ground terminal 201. This conductive member 230 is a copper
plate attached to an inner wall of one of the covers 22, wherein one end of the copper
plate 230 extends toward the ground terminal 201, and is pressed to abut against the
ground terminal 201 when the two covers 32 are engaged with each other, and the other
end of the copper plate 230 extends to screw holes 240 for allowing the screws 24
to penetrate therethrough, whereby the screws 24 are made to come into contact with
the copper plate 230 when being screwed into the screw holes 240.
[0023] In particular, two of the screws 24 are adopted in this embodiment, and alternatively,
the conductive member 230 can be an approximately T-shaped copper plate provided on
the inner wall of one of the covers 22. The vertical end of the T-shaped copper plate
230 extends toward the ground terminal 201, and is pressed to abut against the ground
terminal 201 when the two covers 32 are engaged with each other; the other two ends
of the copper plate 230 extend to the screw holes 240, allowing the two screws 24
to come into contact with the copper plate 230 when being respectively screwed into
the screw holes 240.
Third Preferred Embodiment
[0024] Illustrated in FIGs. 11 and 12 are respectively a top view and a cross-sectional
view of a power plug of a third embodiment of the invention. Referring to FIGs. 11
and 12, the power plug 3 comprises: a terminal base 30 having a conductive terminal
300; an electric wire 31 having core wires connected to the conductive terminal 300
and a ground terminal 330, respectively; a cover 32 integrally connected to the terminal
base 30 by means of screws 320; a ground wire 33 having one end thereof connected
to the ground terminal 330 inside the terminal base 30 and the cover 32; and a ground
mechanism 34 for connecting the screws 320 to the ground terminal 330 of the ground
wire 33, so as to ground the screws 320.
[0025] The power plug of the invention is characterized in the provision of a ground mechanism,
which can solve a problem of electron ionization occurring in a conventional power
plug as previously described, and further allow timbre quality of audio equipment
to be effectively improved, whereby sounds generated from the audio equipment are
clarified, especially for low bands to be more stable and sound. Moreover, in the
use of the power plug of the invention, metal-induced interference with power or current
passing through inside of the power plug and electric wires can be eliminated, allowing
high quality of the clear original sounds to reappear.
[0026] In conclusion, the invention evidently provides positive and affirmative improvements
in elevating and raising sound quality generated by the audio equipment.
[0027] The invention has been described using exemplary preferred embodiments. However,
it is to be understood that the scope of the invention is not limited to the disclosed
embodiments. On the contrary, it is intended to cover various modifications and similar
arrangements. The scope of the claims, therefore, should be accorded the broadest
interpretation so as to encompass all such modifications and similar arrangements.
1. A power plug, comprising:
a terminal base having at least one conductive terminal and a ground terminal;
an electric wire having core wires connected to the conductive terminal and the ground
terminal, respectively;
a cover integrally connected to the terminal base by a plurality of first screws;
and
a ground mechanism for connecting the first screws to the ground terminal, allowing
the first screws to be grounded.
2. The power plug of claim 1, wherein the ground mechanism includes a conductive member
for connecting the first screws to the ground mechanism.
3. The power plug of claim 2, wherein the conductive member is a copper plate, which
copper plate has one end thereof being connected to the ground terminal, and the other
end thereof extending to screw holes, allowing the first screws to be respectively
screwed into the screw holes and come into contact with the copper plate.
4. The power plug of claim 2, wherein two of the first screws are provided in the power
plug, and the conductive member is a M-shaped copper plate, which copper plate has
a central portion thereof being connected to the ground terminal, and two ends thereof
respectively extending to two screw holes, allowing the two first screws to be respectively
screwed into the screw holes and come into contact with the copper plate.
5. The power plug of claim 1, further comprising:
a wire fixing mechanism installed in the cover, which wire fixing mechanism includes
a press board positioned at where the electric wire passes thereby, and a clamping
member underneath the press board; and
two second screws respectively penetrating through the cover and screwed at two ends
of the press board;
wherein the two second-screws are screwed tight for making the press board move
toward an inner wall of the cover, so as to press the electric wire to abut against
the inner wall of the cover, and to be firmly clamped by the clamping member.
6. The power plug of claim 5, wherein the ground mechanism includes a first conductive
member for connecting the first screws to the ground terminal, allowing the first
screws to be grounded; a second conductive member for interconnecting the two second
screws; and a third conductive member for connecting the first screws to the second
conductive member, so as to ground the second screws via the second conductive member
and the first screws.
7. The power plug of claim 6, wherein two of the first screws are provided in the power
plug, and the first conductive member is a M-shaped copper plate, which copper plate
has a central portion thereof being connected to the ground terminal, and two ends
thereof respectively extending to two first screw holes, allowing the two first screws
to be respectively screwed into the first screw holes and come into contact with the
copper plate.
8. The power plug of claim 7, wherein the second conductive member is a copper plate,
which copper plate has two ends thereof respectively extending to two second screw
holes, allowing the two second screws to be respectively screwed into the second screw
holes and come into contact with the copper plate.
9. The power plug of the claim 8, wherein the second conductive member has a central
portion thereof being exposed to one of the first screw holes, and the third conductive
member is a metallic spring installed in this first screw hole, and is pressed when
one of the first screws is screwed into the first screw hole, in a manner that one
end of the metallic spring abuts against the first screw, and the other end of the
metallic spring adjoins the central portion of the second conductive member.
10. A power plug, comprising:
a terminal base having at least one conductive terminal and a ground terminal;
an electric wire having core wires connected to the conductive terminal and the ground
terminal, respectively;
two covers integrally connected to the terminal base by a plurality of screws, and
capable of being coupled to each other for enclosing the conductive terminal and the
ground terminal therein; and
a ground mechanism for connecting the screws to the ground terminal, allowing the
screws to be grounded.
11. The power plug of claim 10, wherein the ground mechanism includes a conductive member
for connecting the screws to the ground mechanism.
12. , The power plug of claim 11, wherein the conductive member is a copper plate provided
on an inner wall of one of the covers, which copper plate has one end thereof extending
toward the ground terminal, and pressed to abut against the ground terminal when the
two covers are coupled to each other, whereas the other end of the copper plate extends
to screw holes, allowing the screws to be respectively screwed into the screw holes
and come into contact with the copper plate.
13. The power plug of claim 11, wherein two of the screws are adopted in the power plug,
and the conductive member is a T-shaped copper plate provided on an inner wall of
one of the cover, which copper plate has a vertical end thereof extending toward the
ground terminal, and pressed to abut against the ground terminal when the two covers
are coupled to each other, whereas the other two ends of the copper plate respectively
extend to two screw holes, allowing the two screws to be respectively screwed into
the screw holes and come into contact with the copper plate.
14. A power plug, comprising:
a terminal base having at least one conductive terminal;
an electric wire having core wires connected to the conductive terminal and a ground
terminal, respectively;
a cover integrally connected to the terminal base by a plurality of screws;
a ground wire having one end thereof being connected to the ground terminal, and the
other end thereof extending to outside of the power plug and connected to an external
ground device; and
a ground mechanism for connecting the screws to the ground terminal of the ground
wire, allowing the screws to be grounded.