KR20140090545A - Socket having a function of electric shock protection - Google Patents

Abstract

The present invention relates to an outlet with an electric shock preventing function. The outlet with the electric shock preventing function according to the present invention prevents an electric shock by forming an electric shock preventing unit to prevent a current leakage between a power supply line and a power supply terminal of the outlet.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a socket having an electric shock prevention function,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an outlet technology, and more particularly to an outlet having an electric shock prevention function.

A receptacle is a device used to connect electrical wiring to a cord. A plug is inserted here, and a 3-pin receptacle with a 2-pin receptacle and a grounding line is available depending on the number of pins of the plug. 3 pins are often used.

If there is a short circuit to the outlet connected to the power source, the human body is exposed to the risk of electric shock. Electric shock is a phenomenon in which the human body reacts when the current flowing from the power source through the human body to the ground surface is greater than a predetermined value.

Generally, currents exceeding 15mA cause spasticity and more than 50mA lead to death. The main cause of death is a heart attack in which the heart stops working as current through the heart damages the nerve. The risk of electric shock is related to the resistance of the human body when energized, which is highly dependent on the condition of the skin.

When the outlet is in the water When the human body touches the metal housing or the like which is energized through the water or the water, the current of the outlet flows to the ground through the water and the human body. At this time, the human body is likely to be wet with rain, and in this case, the contact resistance is extremely low, which is very dangerous.

Korean Patent Laid-Open No. 10-2005-0037986 (Apr. 25, 2005) discloses that when a metal plate or metal net is attached to a charger or an electric current leaking from the charger is energized by a conductive metal plate or a metal net, And an electric shock prevention device having an immersion electric shock prevention function for preventing an accident. The metal plate or metal net is connected to the neutral and earth terminals among the terminal blocks by electric wires. The size of the metal plate is approximately 50 cm x 30 cm.

This technique does not explain the principle in detail, but it is possible to arrange the metal plate in parallel with the body by arranging the metal plate with a resistance much lower than the resistance between the water and the human body between the flooded conductors in the flooding, . However, such a metal plate or metal net is connected to the terminal block by a separate electric wire and is bulky, so that there is a space limitation in installation.

Korean Patent Publication No. 10-2005-0037986 (April 25, 2005)

An object of the present invention is to provide an outlet having an electric shock prevention function for preventing electricity from flowing into a liquid even if a liquid outlet such as water is flooded, .

According to an aspect of the present invention, there is provided a socket for an electric shock protection device, comprising: a body having a seating groove formed therein; A cover coupled to an upper portion of the body; A power supply terminal installed in a part of a seating groove of the body and connected to a plug to supply electricity to the plug; A plug insertion groove formed in the cover; An electric shock prevention unit installed in a part of a seating groove of the body and connected between the power supply terminal and a power supply line to prevent current leakage; And the like.

According to a further aspect of the present invention, the anti-electrostatic unit includes: a first terminal connected to the first lead line of the power supply terminal; A second terminal connected to a second lead line of the power supply terminal; A third terminal connected to a third lead line of the power supply line; A fourth terminal connected to the fourth lead line of the power supply line; Wherein the first lead wire is connected to the first terminal and the third terminal and has a width larger than a thickness of the first lead wire and a length longer than a thickness of the first lead wire, A first flat plate-like conductor having a thickness of at least 100,000 times; A second flat-plate-like conductor connected between the second terminal and the fourth terminal, the second flat-type conductor having the same size as the first flat-plate-like conductor; A nonconductive housing for electrically separating and fixing the first planar conductors and the second planar conductors; .

According to a further aspect of the present invention, the material of the first planar conductor and the second planar conductor is copper (Cu).

According to a further aspect of the present invention, the non-conductive housing is characterized in that the first plate-like conductor and the second plate-like conductor are fixed so as to face each other.

The present invention has an effect of preventing an electric shock accident even if the socket is exposed to the liquid by immersion or the like by forming an electric shock prevention part for preventing the leakage of electric current between the power supply terminal and the electric power supply line of the electric socket.

1 is a perspective view showing a configuration of an embodiment of an outlet having an anti-electrostatic function according to the present invention.
2 is a perspective view showing a configuration of an embodiment of an electric shock preventing portion of a socket outlet having an electric shock preventing function according to the present invention.
3 is a cross-sectional view showing a configuration of an embodiment of an electric shock prevention portion of a socket outlet having an electric shock protection function according to the present invention.
4 is a view showing an example of a socket-outlet having an anti-electrostatic function according to the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the like elements throughout.

In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

The terms used throughout the specification of the present invention have been defined in consideration of the functions of the embodiments of the present invention and can be sufficiently modified according to the intentions and customs of the user or operator. It should be based on the contents of.

1 is a perspective view showing a configuration of an embodiment of an outlet having an anti-electrostatic function according to the present invention. 1, a socket 100 having an anti-shock function according to this embodiment includes a body 110, a lid 120, a power supply terminal 130, a plug insertion groove 140, And an electric shock prevention unit 150. [

The body 110 has a seating groove 111 formed therein. As shown in the drawing, the body 110 is not limited to a rectangular shape, but may be embodied in various shapes such as a circle.

The lid 120 is coupled to an upper portion of the body 110. The structure for coupling the lid 120 to the body 110 may be implemented in various forms and is well known in the art before being disclosed. Therefore, the detailed description of the coupling structure will be omitted.

The power supply terminal 130 is installed in a part of the seating groove 111 of the body 110 and the plug 200 is coupled to supply electricity to the plug. That is, the power supply terminal 130 functions as an electrode.

The plug insertion groove 140 is formed in the lid 120, and the plug 200 is inserted. The plug 200 is inserted through the plug insertion groove 140 and is connected to the power supply terminal 130 serving as an electrode so that a commercial power source is connected to an electronic device .

The electric shock prevention unit 150 is installed in a part of the seating groove 111 of the body 110 and is connected between the power supply terminal 130 and the power supply line 160 to prevent current leakage.

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an electric shock preventer for an electric socket, Fig.

2 and 3, the anti-shock unit 150 includes a first terminal 151, a second terminal 152, a third terminal 153, a fourth terminal 154, A first flat plate-like conductor 155, a second flat plate-like conductor 156, and a nonconductor housing 157.

The first terminal 151 is connected to the first lead line 131 of the power supply terminal 130. The second terminal 152 is connected to the second lead line 132 of the power supply terminal 130. The third terminal 153 is connected to the third lead 161 of the power supply line 160. The fourth terminal 154 is connected to the fourth lead wire 162 of the power supply line 160.

The first flat plate-like conductor 155 is connected between the first terminal 151 and the third terminal 153 and has a width larger than the thickness of the first lead line 131, (131), and the area that is a product of the width and the length is not less than four times and not more than 100,000 times the cross-sectional area of the first lead wire. The second flat plate type conductor 156 is connected between the second terminal 152 and the fourth terminal 154 and has the same specification as the first flat plate type conductor 155. The nonconductive housing 157 electrically isolates and fixes the first planar conductors 155 and the second planar conductors 156.

The first lead wire 131 that is screwed to the first terminal 151 and the second lead wire 132 that is screwed to the second terminal 152 are physically and electrically identical to each other. However, the present invention is not limited thereto.

Similarly, the third lead wire 161 that is screwed to the third terminal 153 and the fourth lead wire 162 that is screwed to the fourth terminal 154 are physically and electrically identical to each other. However, the present invention is not limited thereto.

The receptacle is usually a wire that is physically and electrically identical to the first lead wire 131 and the third lead wire 161 and the second lead wire 132 and the fourth lead wire 162 are physically and electrically identical to each other. However, the present invention is not limited thereto.

In one embodiment, the first terminal 151, the second terminal 152, the third terminal 153, and the fourth terminal 154 are all formed in the same shape. However, they may be configured in different forms, either individually or in pairs. As shown, in one embodiment, these terminals are inserted into the screw holes directly drilled at both ends of the first plate-like conductor 155 and the second plate-like conductor 156, And an auxiliary plate which is in tight contact with the screw 157 and which helps to fix the lead wire peeled off between the screw and the nonconductive housing 157. In another example, the terminals may be formed by being pressed and fixed to one end of the first plate-like conductor 155 and the second plate-like conductor 156. The terminals may be configured in various forms connecting the wires to both ends of the planar conductor.

The nonconductor housing 157 is a structure that physically fixes the terminals and the planar conductors. Since the illustrated embodiment is applied to a two-wire system, the nonconductor housing 157 fixes two plate-like conductors, but in the case of a three-wire system, the three plate-like conductors may be fixed. The nonconductive housing may be made of plastic or ceramic material, which is nonconductive.

It is advantageous to expose the planar conductors to each other as much as possible in the flooded state, so that the nonconductor housing fixes both ends of the planar conductors, and the structure of the nonconductor housing is designed so that most of the planar conductors are exposed in the air do. In the illustrated embodiment, the plate-like conductor is fixed at a lower height than the outline of the non-conductor housing so that the operator inadvertently contacts the plate-like conductor exposed at the time of installation or after installation to prevent electric shock.

Specifically, the four pillars projecting on the top of the non-conductor housing fix the plate-like conductor by the terminals, which project slightly higher than the plate-like conductor fixed to the column.

According to an additional aspect, the nonconductor housing 157 may be configured to fix the first planar conductors 155 and the second planar conductors 156 to face each other. When viewed electrically from the viewpoint of the present invention, when the receptacle is immersed in water, water is filled between the two plate-like conductors, resulting in an electrical resistor formed by water between the two plate-like conductors.

Since the electrical resistance is proportional to the length of the resistor and inversely proportional to the cross-sectional area, when the planar conductors face each other, the cross-sectional area becomes the maximum, the length becomes minimum, and the electrical resistance is minimized. Thus, when connected in parallel to the human body and the ground plane, the current flowing to a human body having a higher resistance can be minimized.

According to another aspect, the first plate-like conductor 155 and the second plate-like conductor 156 are installed in a state where they are opposed to each other, and the outlet is located at a lower position Can be installed. For example, in the case of streetlight, the controller exposed at the bottom is installed in a waterproof space. However, when rainwater or the like gets in this space, people around the house are in danger of electric shock. An outlet having an electric shock prevention function is installed in the waterproof space and is installed at a position lower than the controller, so that the controller floods before the flooding of the controller, thereby allowing the controller to operate first.

According to another aspect, the material of the first plate-like conductor 155 and the second plate-like conductor 156 may be copper (Cu). According to the experiment, when the material of the plate-like conductor was copper rather than iron or aluminum, the effect of the receptacle provided with the anti-electrostatic function was excellent.

4 is a view showing an example of a socket-outlet having an anti-electrostatic function according to the present invention. In the first experiment, the water tank 502 is filled with water, and an outlet 100 having an anti-shock function connected to an outlet of a commercial power source is immersed in the water tank 502, and an electric lamp 505, The lamp is exposed to the outside of the water tank and the water in the water tank is not grounded.

At this time, it can be confirmed that the lamp 505 is lit even though the outlet 100 having the electric shock prevention function is immersed in water. Next, the experimenter 509 grasps the exposed end of the electric wire and measures the current flowing through the electric wire with the ammeter 507 while the exposed end is immersed in the water tank. It may be dangerous if the experimenter (509) conducts the experiment directly, so it may be replaced by an animal having a similar conductive property to the human body instead of the human body.

Table 1 below shows the result of repeating the experiment for the plate-type conductor having various lengths and lengths. A commercial power source of 220 V / 60 Hz was used as the power source, a load of 120 W incandescent lamp was connected, and a gap between the two flat plate conductors facing each other was 10 mm. The wires used also include a cylindrical conductor with a diameter of 1.8 mm. In the following table, the width is the width of the plate-like conductor, the length is the length, and the measured value is mA.

Length Width 0.9mm 1.8mm 3.6mm 7.2mm 14.4 mm 28.8 mm 0.9mm 13.12 12.51 12.07 11.42 11.03 10.02 1.8mm 12.52 2.52 1.10 0.90 0.75 0.67 3.6mm 12.05 1.10 0.95 0.75 0.67 0.37 7.2mm 11.41 0.90 0.75 0.67 0.37 0.21 14.4 mm 11.02 0.75 0.67 0.37 0.21 0.11 28.8 mm 10.03 0.67 0.37 0.21 0.11 0.05 57.6 mm 9.81 0.37 0.21 0.11 0.05 0.01

The experimental results show that the current passing through the human body is insignificant with respect to the size of all the planar conductors. In this experiment, when a single-phase alternating current flows through the water in a water tank, a voltage drop occurs in the water, which is a three-dimensional resistor. When the human body touches, the current flowing through the human body between the water and the ground is shifted to the middle value It is presumed to result in exposure to a much lower AC power than in the case of direct contact with a typical single-phase AC.

The data below are the same as in the above experiment except that the ground wire is immersed in the water in the tank and the water is grounded. If a streetlight is flooded, the water is grounded because of electrical contact with the ground. In reality, it is closer to the state where electric equipment is flooded. In this state, it was confirmed that the amount of leakage current did not change greatly.

Length Width 0.9mm 1.8mm 3.6mm 7.2mm 14.4 mm 28.8 mm 0.9mm 13.21 12.79 12.21 11.68 11.12 10.13 1.8mm  12.79  2.54 1.12 0.92 0.77 0.69 3.6mm  12.21  1.12  0.97 0.77 0.69 0.39 7.2mm 11.68 0.92 0.77 0.69 0.39 0.23 14.4 mm  11.12  0.77 0.69 0.39 0.23 0.13 28.8 mm 10.13 0.69 0.39 0.23 0.13 0.07 57.6 mm  10.01  0.39 0.23 0.13 0.07 0.03

The data below is the result of measuring the amount of leakage current around the watertight flat-plate conductor by distance. The purpose of this experiment is to confirm the relationship between the leakage current on the conductive line and the leakage current around the flat plate-like conductor.

Area \ Distance 0cm 5cm 10cm 15cm 14.4mm x 28.8mm 0.304 0.230 0.170 0.120 28.8mm x 28.8mm 0.605 0.054 0.009 0.005

The experimental results suggest that most of the current flows around the space between the opposing planar conductors. An electric field of 943 V / m was formed between the two exposed wires before the plate-type conductor was installed, but it was confirmed that the measurement limit between the two plate-type conductors exceeded 1,999 V / m after the plate-type conductor was installed.

This experiment can be modeled electronically with the middle part of the electrical resistor called water between two planar conductors grounded. The human body can be modeled as another resistor connected between this electrical resistor and the ground plane. The resistance of human body and the resistive bodies of water connected between the two planar conductors and the ground plane are electrically connected in parallel to limit the current flowing into the human body.

As shown in Table 1 and Table 2, there is no significant difference in measured values between the case where the water in the water tank is grounded or not, and there is no significant difference in the risk of electric shock. It can also be seen that the amount of current flowing rapidly increases when either the width or length of the planar conductor is narrower or shorter than the diameter of the conductor. This means an increased risk of electric shock.

In addition, it can be seen from the results of <Table 1> and <Table 2> that the current flowing through the human body is related to the ratio of the area of the planar conductor to the cross-sectional area of the cylindrical wire. Here, the area of the plate-like conductor refers to a value obtained by multiplying the width and the length by the plate-like shape of the plate-like conductor. If the radius of the wire is r, the width of the wire is 2r and the cross-sectional area of the wire is πr ^2. Thus, for example, in the first row of Table 2, is (r) (r) = r 2, (r) 2r = 2r 2, (r) (4r) = 4r 2, (r) (8r) = 8r 2, (r) (16r) = 16r 2, ( r) (32r) = 32r ² the like, and the ratio of the area of the wire cross-sectional area of the plate-like conductor is 1 / π = 0.32, 2 / π = 0.64, 4 / π = 1.27, 8 / π = 2.55, 16 /? = 5.09, 32 /? = 10.19, and so on.

If in reality an electrical facility is an a bit closer to the state of the water in the submerged state of the ground state <Table 2> of 2.54 mA when the reference value substantially equal to or less than 1.27 the ratio of the cross-section area of the cylindrical front of the plate-like conductor in Or more, and when the current is 5.09 times, the reference value is 0.97 mA . In this experiment, if the area of the planar conductor is four times or more the cross-sectional area of the cylindrical wire, it can be seen that the current flows to the human body in a normal state.

The larger the flat-plate-shaped conductor, the higher the manufacturing cost is, and the more space is occupied, resulting in a practical problem. If the wire diameter is about ² mm, the cross-sectional area is 3.14 mm ^2. If the wire diameter is 100,000 times, it is 3,140 cm ² , which is 314 cm when the width of the flat type conductor is 10 cm. .

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is evident that many alternatives, modifications and variations will be apparent to those skilled in the art. For example, the present invention can be applied to three-phase power. The claims are intended to cover such obvious variations. For example, although the embodiment of the present invention has been described as an example of an electric appliance having an electric shock prevention function as an example, an electric appliance having an electric shock protection function may be used in other electric equipment such as a circuit breaker, a terminal block, a plug, Can be embedded. This can be applied through a design change in which two planar conductors having substantially the same size are inserted on the transmission and distribution path inside the electric device. Therefore, in this specification, the expression &quot; outlet with an anti-shock function &quot; should be interpreted to encompass these various electrical equipments.

INDUSTRIAL APPLICABILITY The present invention is industrially applicable in the field of receptacle technology and its application technology.

100: Outlet
110: Body
120: Cover
130: Power supply terminal
140: Plug insertion groove
150:
151: first terminal
152: second terminal
153: third terminal
154: fourth terminal
155: first flat plate-like conductor
156: second flat plate-like conductor
157: Non-conductor housing

Claims (4)

A body having a seating groove formed therein;
A cover coupled to an upper portion of the body;
A power supply terminal installed in a part of a seating groove of the body and connected to a plug to supply electricity to the plug;
A plug insertion groove formed in the cover;
An electric shock prevention unit installed in a part of a seating groove of the body and connected between the power supply terminal and a power supply line to prevent current leakage;
And an outlet provided with an electric shock prevention function. The method according to claim 1,
The above-
A first terminal connected to a first lead line of the power supply terminal;
A second terminal connected to a second lead line of the power supply terminal;
A third terminal connected to a third lead line of the power supply line;
A fourth terminal connected to the fourth lead line of the power supply line;
Wherein the first lead wire is connected to the first terminal and the third terminal and has a width larger than a thickness of the first lead wire and a length longer than a thickness of the first lead wire, A first flat plate-like conductor having a thickness of at least 100,000 times;
A second flat-plate-like conductor connected between the second terminal and the fourth terminal, the second flat-type conductor having the same size as the first flat-plate-like conductor;
A nonconductive housing for electrically separating and fixing the first planar conductors and the second planar conductors;
And an outlet provided with an electric shock prevention function. 3. The method of claim 2,
Wherein the first plate-like conductor and the second plate-like conductor are made of copper (Cu). The method according to claim 2 or 3,
And the nonconductive housing is fixed so that the first plate-like conductor and the second plate-like conductor are opposed to each other.

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