TECHNICAL FIELD
[0001] The present invention mainly relates to an electrical cable device with waterproof
structure, more particularly, an electrical cable device with rubber material, mounted
among the placement of connection of the power source, increasing the impermeability
by plurality of longitudinal arms and transverse arms structure, to prevent the infiltration
of water or moisture for reducing the risk of accidents.
BACKGROUND
[0002] Since the electrical power was widely used in civilization, various sorts of electrical
devices have been entered into daily life of humans, under the comprehensive application
of electrical devices, the electrical cable devices were disposed in the electrical
devices for transmitting the electrical energy, electrical signal, or making the achievement
of transformation and rectification between the AC current and DC current. For example,
the power cable device of the notebook computer commonly used has a rectification
function; the power cable device of the portable smart device has both signal and
power transmission, rectification function.
[0003] Please refer to Fig. 1, which illustrate the structure of common used power cable
device (100) in the prior art, including power module (101), comprising with printed
circuit (1011) or electrical elements, the connection cable (103) for transmitting
electrical energy and electrical signals is coupled to connection port (1013), which
is disposed on the power module (101) through corresponding male and female connectors.
However, since the connection port (1013) of said power cable device (100) in the
prior art lack the waterproof or dust proof structure, resulting in the moisture or
suspended particulate was easily infiltrated into the electrode of connection port
(1013), rusting said electrode and making malfunction or short circuit after the life
raising of power cable device (100), in that case, the voltage of the power cable
device (100) may instantly raise, injuring the electrical equipment that supplies
electrical energy, shortening its life, and even causing fire or leakage electrical
power.
[0004] Therefore, some of manufacturers providing several kinds of technical solutions in
the prior art, such as European Patent
EP1059698A2, which discloses a waterproof connector, comprising the rubber mat plug or rubber-like
material in the structure of the connector housing, disposed on the plane of engaging
recess with a plurality of bores in the front end of the connector housing, allowing
electric wires passing through the inside and outside of the waterproof connector.
During the connecting process in said waterproof connector, the engaging recess and
the electric wires are tightly engaged with each other through the deformation of
the rubber mat plug, reaching the purpose with a certain level of waterproof performance.
However, in the prior art, there did exist some disadvantage waiting for the improvement.
[0005] First of all, taking the rubber mat plug as concern, in the prior art, the rubber
mat plug or rubber-like material of waterproof connector mostly limited the mounted
position on the plane of engaging recess, nearing the electric wires, but not completely
laid on the entire surface of the engaging recess, so that the moisture or suspended
particulate still has the opportunity to infiltrate, unabling to achieve comprehensive
waterproof performance; moreover, the plane of the engaging recess and the electric
wires lack the structure which could press out the residual air inside the waterproof
connector during the connection process, leaving small amount of residual air in the
gap between the engaging recess and the electric wires, thus, impermeability of the
waterproof connector still needs to improve.
[0006] To sum up, it still needs to improve the waterproof structure of the power connection
device for raising the waterproof performance, preventing the moisture or suspended
particulate from entering the power cable device.
SUMMARY OF THE INVENTION
[0007] In view of the disadvantages in the prior art, a novel electrical cable device with
waterproof structure is proposed, said electrical cable device comprising: power module,
mounted with the connection port and the first rubber ring; the first longitudinal
arm and the second longitudinal arm are located at the connection port, and the length
of first longitudinal arm is larger than second longitudinal arm; connection cable,
comprising with connection cable shell; and, connection head, mounted at the front
end of connection cable shell; the surface in the front end of connection cable shell
having second rubber ring, the electrical cable device is fixed by pressing and squeezing
the second rubber ring and the first rubber ring when the power module electrical
coupling with connection cable, wherein the direction of the first longitudinal arm
and the second longitudinal arm are perpendicular to connection head, pressing out
the residual air inside and raising the impermeability of electrical cable device.
[0008] According to the content of the present invention, the electrical cable device further
comprising the first transverse arm and the second transverse arm. When the connection
port is coupled to the connection head, the transverse and longitudinal pressure are
formed via the first transverse arm, the second transverse arm, the first longitudinal
arm, and second longitudinal arm. The transverse and longitudinal pressure causes
the air in the gap between the connection port and connection head to be slowly discharged,
further improving the impermeability of the electrical cable device.
[0009] As the mentioned as above, in the front view of connection head, the plurality of
first transverse arm and second transverse arm are arranged as "∞"-like configuration,
in the process of said connection head with "∞"-like configuration which is coupled
to the power module, since the area of the surface on contact is larger than the conventional
"O"-like configuration, preventing the non consistent of pressure among the left and
right ends of the connection head, making a gap is formed at one end through the lower
pressure, so that the ambient air, moisture and suspended particles have the opportunity
to infiltrate inside and affect the normal operation of the power cable device.
[0010] In addition, at the rear end of the connection cable shell, a rear-end rubber jacket
is disposed to seal the gap between the connection cable and the connection cable
shell, so that the outer portion of the connection cable shell is isolated from the
inner portion, for blocking the external ambient air, moisture and suspended particles.
[0011] According to the content of present invention, the material of the first rubber ring
and the second rubber ring could be, but not limit to Polyurethane (PU), Butyl Rubber
(IIR), Hypalon Polyethlene Rubber (CSM), Natural Rubber (NR), Polyacrylate Rubber
(ACM), Neoprene Rubber (CR), or the combination of the above.
[0012] According to the embodiments of present invention, the degree of protection provided
against ambient air, moisture and suspended particles could reach the level of IPX4-IPX8
(International Protection Marking).
BRIEF DESCRIPTION OF THE DRAWINGS
[0013] The components, characteristics and advantages of the present invention may be understood
by the detailed descriptions of the preferred embodiments outlined in the specification
and the drawings attached:
Fig. 1 illustrates the structure of electrical cable device according to the prior
art.
Fig. 2 illustrates the structure of electrical cable device with waterproof structure
in the present invention.
Fig. 3 displays the fine-structure of electrical cable device and illustrates how
the impermeability could be improved in the present invention.
Fig. 4A-4C illustrates the assembly process of the connection cable.
Fig. 5 illustrates in the front view of connection head are arranged form "∞"-like
configuration.
DETAILED DESCRIPTION
[0014] Some preferred embodiments of the present invention will now be described in greater
detail. However, it should be recognized that the preferred embodiments of the present
invention are provided for illustration rather than limiting the present invention.
In addition, the present invention can be practiced in a wide range of other embodiments
besides those explicitly described, and the scope of the present invention is not
expressly limited except as specified in the accompanying claims.
[0015] The purpose of the present invention is to improve the structure of electrical cable
device in the prior art. First of all, in the portion of rubber ring adopted the method
of insert molding, which is completely mounted in the interface plane of the connection
port and the connection head, including the position close to the electrode, reducing
the probability of moisture and suspended particles infiltrating into the interior
of the connection cable shell; second, pressing out the residual air inside the electrical
cable device during the connection process between the power module and connection
cable via the structure proposed in the present invention, reducing the residual air
as less as possible, homogenizing the pressure at both ends of the connection head
for reducing the probability of moisture infiltration in the low pressure end; finally,
the numbers of said first longitudinal arm, said second longitudinal arm, said first
transverse arm, said second transverse arm could be disposed according to the need
of embodiments, also could be generally known as "longitudinal arm" and "transverse
arm". Similarly, it should be recognized that the structure in preferred embodiments
of the present invention are provided for illustration rather than limiting the present
invention.
[0016] Please refer to Fig. 2 and Fig. 3, the present invention proposed an electrical cable
device (200) with waterproof structure, comprising: power module (201), mounted with
the connection port (2013) and the first rubber ring (2011); the first longitudinal
arm (2015) and the second longitudinal arm (2017) are located at the connection port
(2013), and the length of first longitudinal arm (2015) is larger than second longitudinal
arm (2017); connection cable (203), comprising with connection cable shell (2033);
and, connection head (2031), mounted at the front end of connection cable shell (2033);
the surface in the front end of connection cable shell (2033) having second rubber
ring (2037), the electrical cable device (200) is fixed by pressing and squeezing
the second rubber ring (2037) and the first rubber ring (2011) when the power module
(201) electrical coupling with connection cable (203), wherein the direction of the
first longitudinal arm (2015) and the second longitudinal arm (2017) are perpendicular
to connection head (2031), pressing out the residual air inside and raising the impermeability
of electrical cable device (200).
[0017] As mentioned above, the connecting cable shell (2033) has a case-like configuration
and at least one through hole at the front end and the rear end, so that the cable
of the connection cable (203) could be passed through, the through hole of the front
end is matched with the transverse arm, shaped as "∞" -like structure, the rear end
of connecting cable shell (2033) is made by two or more cylindrical shapes with different
radius, in that case, therefore, the connection cable (203) could be gradually converging
to raise the impermeability of the connection cable shell (2033).
[0018] Please refer to Fig. 3, in one embodiment of the present invention, the first longitudinal
arm (2015) is located at the left of the second longitudinal arm (2017), and the length
of the first longitudinal arm (2015) is larger than the second longitudinal arm (2017).
The characteristic of structure above could make the pressure providing via the first
longitudinal arm (2015) at left side greater than the pressure provided by second
longitudinal arm (2017), ensured that the residual air air could be pressed and exhausted
from the power cable device (200) due to the compress of the first rubber ring (2011)
and the second rubber ring (2037), preventing the ambient air, moisture and suspended
particles have the opportunity to infiltrate inside the power cable device (200).
[0019] In one preferred embodiment of the present invention, the length of the second transverse
arm (2039) is larger than the first transverse arm (2038), resulting in the length
of central on connection head (2031) is larger than the surrounding and making the
transverse arms parallel to each others as well. In one aspect of the present invention,
when the connection head (2031) is inserted into the power module (201), the pressure
provided by second transverse arm (2039) at the center to compress the residual air
could be larger than the surrounding of the first transverse arm (2038), thus, the
residual air could be fully discharged, in that case, the pressure generated from
two directions would be enhanced and promoted the impermeability of the electrical
cable device (200).
[0020] Please refer to Fig. 5, in the front view of connection head (2031) mounted on the
connection cable (203), the plurality of first transverse arm (2038) and second transverse
arm (2039) are arranged as "∞"-like configuration to raise the contact area of the
surface as large as possible, providing the pressure consistent among the left and
the right end, and, the second rubber ring (2037) is completely mounted on the inner
of the connection head (2031) and is parallel to the surface.
[0021] Furthermore, in one aspect of application in the present invention, the numbers of
longitudinal arm and the transverse arm could be disposed according to the need of
massive transmission of electrical energy and electrical signal. For instance: when
a high throughput charger, or a transmitter with high flux of data which the multiple-pin
is require. Therefore, plurality of connection head (2031) with "∞"-like configuration
would raise impermeability through providing the pressure consistent of electrical
cable device (200). In the waterproof structure proposed by the present invention,
it can meet the requirements of IPX4 or higher standard at a relatively economical
cost, according to the International Protection Marking standard (IP), the electrical
cable device (200) is sufficient to withstand liquid pressure of 80-100 kPa, flow
rate of 10 L/min, flow splash for 5 minutes without damaging the equipment, and the
waterproof standard can be raised to the level of IPX8 according to the needs of the
application, also, in the present invention, the range of impermeability is rough
vacuum to medium vacuum, i.e., between 10 and 750 Torr.
[0022] Please refer to Fig. 4A-4C, it illustrates the assembly process of the connection
cable. The connection cable shell (2033) adopted the method of insert molding, and
the second rubber ring (2037) is placed in the mold beforehand in the manufacture,
and when the connection cable shell (2033) is taken out, the second rubber ring (2037)
could completely conform to the configuration of the first transverse arm (2038) and
the second transverse arm (2039) based on its own elasticity, reducing the volume
of the connection cable shell (2033) and improve the engineering tolerance. Also,
the characteristic of the present invention could improve the impermeability and overcome
the disadvantage of prior art, which the rubber ring is directly attached on the surface
of the device via adhesive or high vacuum grease with low impermeability. In another
embodiment of the present invention, the method of assembly process is not limited
to insert molding.
[0023] Please refer to Fig. 4A-4C, according to the present invention, the power connection
device (200) is assembled by inserting the cable of the connection cable (203) into
the connection cable shell (2033) from the front end to the rear end of the connection
head (2031), and fixing the cable to the connection cable shell (2033) tightly. After
the connection cable shell (2033), the rear-end rubber jacket (2035) is mounted on
the rear end of the connecting cable (203), wherein the rear-end rubber jacket (2035)
fixes the connection cable shell (2033), avoiding the infiltration into said power
connection device (200) by moisture. Moreover, the rear-end rubber jacket (2035) is
located at the rear end of the connection cable shell (2033) with cylindrical shape
for acting in concert with the structure at the rear end of the connection cable shell
(2033), the radius of the rear-end rubber jacket (2035) in the rear end is smaller
than the front end, therefore, the connection cable (203) could be converted. In the
embodiments of the present invention, the radius of the rear rubber sleeve (2035)
could be continuous gradient change, or a superposition of two or more cylinders with
different radius.
[0024] According to the content of present invention, the material of the first rubber ring
(2011) and the second rubber ring (2037) could be, but not limit to Polyurethane (PU),
Butyl Rubber (IIR), Hypalon Polyethlene Rubber (CSM), Natural Rubber (NR), Polyacrylate
Rubber (ACM), Neoprene Rubber (CR), or the combination of the above. In the preferred
embodiments of the present invention, the Polyurethane (PU) is adopted for rubber
ring because the deliberation of tensile force, abrasion resistance and impermeability,
which could raise the numbers of swap lifetime. In one preferred embodiment of the
present invention, the numbers of swap lifetime would be 9000-15000 under the requirement
of IPX4-IPX8 (International Protection Marking).
[0025] As will be understood by persons skilled in the art, the foregoing preferred embodiment
of the present invention illustrates the present invention rather than limiting the
present invention. Having described the invention in connection with a preferred embodiment,
modifications will be suggested to those skilled in the art. Thus, the invention is
not to be limited to this embodiment, but rather the invention is intended to cover
various modifications and similar arrangements included within the spirit and scope
of the appended claims, the scope of which should be accorded the broadest interpretation,
thereby encompassing all such modifications and similar structures. While the preferred
embodiment of the invention has been illustrated and described, it will be appreciated
that various changes can be made without departing from the spirit and scope of the
invention.
1. An electrical cable device (200) with waterproof structure, comprising:
a power module (201), mounted with a connection port (2013) and a first rubber ring
(2011);
wherein a plurality of longitudinal arms are located at the connection port (2013),
comprising a first longitudinal arm (2015) and a second longitudinal arm (2017), the
length of the first longitudinal arm (2015) is larger than the second longitudinal
arm (2017);
a connection cable (203), comprising a connection cable shell (2033); and,
a connection head (2031), mounted at the front end of the connection cable shell (2033),
a second rubber ring (2037) is mounted on the surface in the front end of the connection
cable shell (2033), when the power module (201) electrical coupling with connection
cable (203), the electrical cable device (200) is fixed by squeezing the second rubber
ring (2037) and the first rubber ring (2011);
wherein the direction of the first longitudinal arm (2015) and the second longitudinal
arm (2017) are perpendicular to the connection head (2031), pressing out residual
air inside the electrical cable device (200).
2. The electrical cable device (200) with waterproof structure of claim 1, wherein the
connection head (2031) comprises a plurality of transverse arms, said plurality of
transverse arms are perpendicular to said first longitudinal arm (2015) and said second
longitudinal arm (2017), wherein the direction of the first longitudinal arm (2015)
and the second longitudinal arm (2017) are perpendicular to connection head (2031),
generating the pressure from transverse and longitudinal directions, raising the impermeability
of electrical cable device (200) when the power module (201) electrical coupling with
connection head (2031).
3. The electrical cable device (200) with waterproof structure of claim 2, the plurality
of transverse arms further comprises a second transverse arm (2039), and a plurality
of first transverse arm (2038), the length of the plurality of second transverse arm
(2039) are larger than the first transverse arm (2038), wherein the numbers of the
plurality of first transverse arm (2038) n≧2.
4. The electrical cable device (200) with waterproof structure of claim 1, the material
of the first rubber ring (2011) and the second rubber ring (2037) could be, but not
limit to Polyurethane (PU), Butyl Rubber (IIR), Hypalon Polyethlene Rubber (CSM),
Natural Rubber (NR), Polyacrylate Rubber (ACM), Neoprene Rubber (CR), or the combination
of the above.
5. The electrical cable device (200) with waterproof structure of claim 1, the rear end
of said connection cable shell (2033) further comprises a rear-end rubber jacket (2035),
said rear-end rubber jacket (2035) with cylindrical shape and the radius of the rear
end is smaller than the front end, the radius of said rear-end rubber jacket (2035)
could be continuous gradient change, or a superposition of two or more cylinders with
different radius.
6. The electrical cable device (200) with waterproof structure of claim 1, the structure
the front of said connection head (2031) is arranged by said plurality of the transverse
arms shaped as at least one "∞"-like structure, wherein said at least one "∞"-like
structure provide consistent pressure between the left side and the right side in
the coupled process of power module (201).
7. The electrical cable device (200) with waterproof structure of claim 1, said electrical
cable device (200) could meet the requirement of IPX4-IPX8.
8. The electrical cable device (200) with waterproof structure of claim 7, the numbers
of swap lifetime of said first rubber ring (2011) and said second rubber ring (2037)
is 9000-15000 under the requirement of IPX4-IPX8.
9. The electrical cable device (200) with waterproof structure of claim 7, the range
of impermeability of said electrical cable device (200) is 10-750 Torr.