KR20060022978A - 2 openings socket outlet having short circuit interrupt function - Google Patents

Abstract

The present invention is excellent in assembling, and relates to a two-hole outlet having a ground fault interruption function that can check whether the earth leakage. The two-hole outlet having a ground fault interrupting function of the present invention has a base having an inner space and a fixing bracket fixed to an outer bottom. In the inner space of the base, a circuit breaker assembly in which an earth leakage blocking function operation unit is formed of a block, and two wire insertion holes to which wires are coupled are installed. The upper portion of the base is coupled to the middle base serving as a cover of the blocking assembly. The upper surface of the middle base is provided with two blade holders to which the plug is coupled, two ground knife holders, a reset button which is an operation operation button for bringing the outlet into an energized state, and the reset button support plate. The two cutlery is provided with a fixed contact at each end and is inserted and fixed in the upper groove of the middle base. The two ground cutoffs are fixed to the fixing bracket disposed at the bottom by screws. The case is coupled to the middle base. The case has two plug insertion holes, a first through hole in which the reset button protrudes, and a second through hole in which the test button is installed.

Description

Two outlets with earth leakage protection function {2 OPENINGS SOCKET OUTLET HAVING SHORT CIRCUIT INTERRUPT FUNCTION}

1 is an external perspective view of a two-hole outlet having a ground fault interrupting function according to the present invention;

2 and 3 are exploded perspective views of a two-hole outlet having a ground fault interrupting function according to the present invention;

4 is a plan view of the blocking assembly;

5 is a side view of the blocking assembly;

6 is a circuit diagram of a breaker assembly;

7 and 8 are views showing the process of pressing the reset button;

9 is a view showing a light transmission structure of the LED of the blocking unit assembly.

Explanation of symbols on the main parts of the drawings

110: base

120: breaker assembly

130: middle base

140: case

The present invention relates to a plug-in outlet having a ground fault circuit breaker, and more particularly, to a two-hole outlet having a ground fault blocking function that is excellent in assemblability and visually confirms a ground fault.

In general, an earth leakage breaker is a device used to prevent an electric shock accident and a fire caused by a short circuit. Such an earth leakage circuit breaker includes an earth leakage circuit breaker installed in a home distribution panel and a ground fault circuit interrupter (GFCI) installed directly to an outlet installed on a wall.

Such a two-hole outlet having a ground fault interrupting function has a limited installation space inside the wall, and thus requires a large number of parts within a limited size, which complicates the shape (composition) of the product, thereby producing a product (assembly). There was a problem that it is difficult to expect stable quality, reasonable manufacturing cost, reasonable parts management, and prompt response in case of defects. In addition, the two-hole outlet having a conventional earth leakage blocking function has no way for the user to easily check the operating state of the earth leakage blocking.

The present invention is to solve such a conventional problem, its purpose is to assemble the core parts of the earth leakage blocking and assembly, step by step assembling each component, forming a laminated assembly form without the connection of wires limited product installation space In order to minimize the size of the product within the product while at the same time to provide a two-hole outlet with a ground fault interrupting function to ensure product productivity and stable production quality. Still another object of the present invention is to provide a two-hole outlet having a new type of earth leakage blocking function capable of visually confirming an operating state of the earth leakage breaker.

According to a feature of the present invention for achieving the above object, a two-hole outlet having a ground fault interrupting function has a base having an inner space and a fixing bracket is fixed to the outer bottom; In the inner space of the base is installed a circuit breaker assembly consisting of a block of the earth leakage blocking function, and the two wire insertion openings are coupled to the wire, coupled to the upper portion of the base serves as a cover of the block assembly At the same time, the upper surface has two cutlery to which the plug is coupled, two ground cutlery, and a reset button which is an operation operation button to make the outlet energized, and a middle base to which the reset button support plate is installed; The two cutlery is respectively provided with a fixed contact at one end, and is inserted and fixed to the upper groove of the middle base, the two grounding cutoff is fixed to the fixing bracket disposed at the bottom by a screw, And a case having a second through hole coupled to the middle base and having two plug insertion holes, a first through hole protruding from the reset button, and a second through hole to which the test button is installed.

According to an embodiment of the present invention, the breaker assembly includes two power terminals, a transformer, a trip device, a reset guide, two movable terminals, a test plate, and a test pin on one printed circuit board.

According to an embodiment of the present invention, the reset guide is made of a pillar-shaped body formed with a button insertion hole in which the reset button is inserted, and two protrusions right and left in the middle of the body, and connected to the button insertion hole under the protrusion. The groove is inserted into the groove and has a thin plate-shaped latch having a hole into which the end of the reset button is inserted. According to an embodiment of the present invention, the two power terminals are installed on the printed circuit board to be in contact with the input power side of the two wire insertion ports to receive power to the printed circuit board. According to an embodiment of the present invention, the two movable terminals have a lower end inserted along the center axis of the transformer and fixed to the printed circuit board to be electrically connected to the power terminal, and the upper end has a movable contact attached thereto. It is located above the protrusion of the reset guide. According to an embodiment of the present invention, the trip device includes a solenoid for generating an electromagnetic force during electricity supply, and a cylindrical bar flanger inserted into the central axis and having one end hooked to the latch. According to an embodiment of the present invention, the test plate and the test pin are integrally inserted into the side of the transformer so that the lower end thereof is coupled to the printed circuit board, and they are contacted by pressing the test button while being spaced apart from each other. do.

According to an embodiment of the present invention, the blocking unit assembly further includes a light emitting element indicating that the earth leakage blocking function is activated, and the two-hole outlet having the earth leakage blocking function is installed in the middle base and the light of the light emitting element A lens having a rod-shaped transparent material for transferring the outside of the case; And a third through hole formed in the case so that an upper portion of the lens is exposed out of the case.

According to a feature of the present invention for achieving the above object, a two-hole outlet having a ground fault interrupting function has a fixing bracket and a base on the bottom layer. Inside this base there is a blocking assembly and two wire inserts. The middle base is coupled to the upper portion of the base. Grooves are formed on the upper surface of the middle base, and a knife holder, a ground knife holder, a reset button support plate, and a reset button are respectively inserted and placed. The case having two plug insertion holes is sequentially coupled to the middle base. As such, the outlet of the present invention has a laminated assembly structure that does not require connection of wires. The base, the middle base and the case are combined into one by a fixing screw at four corners to form a main body, and a packing, a plate, and a cover are respectively coupled to the upper part of the case.

According to an embodiment of the present invention, the blocking unit assembly has a printed circuit board, and two power terminals, a transformer, a trip device, a movable terminal, a light emitting device, a test plate, and a test pin are respectively formed on an upper surface of the printed circuit board. It is installed, the reset guide is mounted on the upper portion of the printed circuit board to form a block.

According to an embodiment of the present invention, the base has a space in which the blocking assembly can be mounted. In the space, a reset guide guide surface protruding from the left and right movements of the reset guide is formed to protrude.

According to an embodiment of the present invention, the test plate and the test pin are fixed and connected on the printed circuit board, and the test plate is integrally fixed to the transformer side in terms of safety of fixing.

According to an embodiment of the present invention, the reset guide has two legs protruding from the bottom thereof, and the printed circuit board is disposed between the legs, and the bottom of the reset guide leg is set when the blocking unit assembly is seated on the base. It rests on the bottom inside the base.

According to the exemplary embodiment of the present invention, the middle base has a blocking part support that can fix the blocking part assembly inside the base through coupling with the base, and protrudes from the bottom. In addition, a lens having a long, transparent rod shape is fixed to a central portion thereof to transmit the light of the light emitting device out of the upper case.

For example, the embodiments of the present invention may be modified in various forms, and the scope of the present invention should not be construed as being limited by the embodiments described below. These examples are provided to more fully explain the present invention to those skilled in the art. Accordingly, the shape of the elements in the drawings and the like are exaggerated to emphasize a clearer description.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to FIGS. 1 to 9. In addition, in the drawings, the same reference numerals are denoted together for components that perform the same function.

1 is a perspective view of a two-hole outlet having an earth leakage blocking function according to an embodiment of the present invention, Figures 2 and 3 are exploded perspective views of the two-hole outlet shown in FIG.

1 to 3, the two-hole outlet of the present invention is a buried type outlet, a composite structure in which the earth leakage blocking function is combined therein, the base 110 in the bottom layer, the internal space 112 of the base 110 There is a blocking unit 120, the middle base 130 above, the middle base 130, the knife base 134 and the ground knife 136, the reset button 138, the reset button support plate 139, Lens 192 is inserted and fixed, and the case 140, the packing 152, the plate 154, the cover 156 has a laminated assembly structure that is assembled on top of one another is characterized by.

Referring to the drawings, each configuration will be described in detail as follows.

As shown in Figures 1 to 3, the lowest layer of the outlet has a box-shaped base 110, the fixing bracket 111 is fixed to the outer bottom of the base 110. This fixing bracket is fixed to the wall buried box. In the inner space 112 of the base, two wire insertion holes 114 to which wires inserted through holes (not visible) formed in the bottom of the base are coupled. Next to it, a printed circuit board 121, two power terminals 125, a transformer 127, two movable terminals 126, a test plate 129a, a tester pin 129b, and a trip device 128 ), The blocking unit assembly 120 in which the reset guide 122 is configured as one block is seated. Above these parts is a middle base 130 to engage with the base top surface.

The blocking assembly will be described in more detail as follows.

As shown in FIGS. 4 and 5, the interrupter assembly 120 includes two power terminals 125, a transformer 127, a trip device 128, and a reset guide on the printed circuit board 121 constituting the bottom surface. 122, two movable terminals 126, a test plate 129a and a test pin 129b are respectively fixed. When the breaker assembly 120 is seated inside the base 110, the power supply terminal 125 is positioned side by side on the input power side of the two wire insertion holes 114 so that the two input wires of the base hole are not visible. The wire is fixed between the wire insertion port 114 and the power supply terminal 125 so that power is introduced into the body. On the upper side of the cylindrical transformer 127, two movable terminals 126 are positioned. The movable terminals 126 are inserted into the center of the transformer and fixed to a printed circuit board to supply the power terminal 125. Connected with As such, since the movable terminal is fixed on the printed circuit board and directly connected to the power terminal, there is no need for a wire connection therebetween. On the other hand, the movable terminal 126 is bent in the form of '??' parallel to the printed circuit board after raising the central axis and then the projection of the reset guide 122 in the state that the movable contact 126a is attached to the end thereof (123b) is placed on. Thereafter, the reset guide 122 is lifted so that the movable contact 126a is in contact with the fixed contact 135 of the knife holder (see FIG. 8).

The reset guide 122 is formed of a pillar-shaped body formed with a button insertion hole 123a into which the reset button 138 is inserted, and two protrusions 123b are formed at the middle portion of the body to the left and right. The movable contacts 126a of the two movable terminals are respectively located. A groove 123c is formed at the lower side of the protrusion to be connected to the button insertion hole in the direction of the trip device 128 so that one end of the thin plate-like latch 124 is inserted therein. The latch 124 is formed with a hole 124a at which the end of the reset button is locked. When the reset button is locked in the hole 124a of the latch, the reset guide 122 is lifted by the elastic force of the spring coupled to the reset button, and the movable contact 126a of the movable terminal is lifted by the lifted reset guide. It is in contact with the fixed contact 135 of the knife receiving 134. The reset guide 122 has two legs 123d protruding from the bottom thereof and descends below the printed circuit board. When the blocking unit 120 is seated inside the base 110, the bottom of the leg touches the bottom of the base. The body of the reset guide 122 protrudes from the bottom of the base and contacts the reset guide guide surface 116 formed so that the reset guide 122 detaches the contact point in a stable operation without shaking left and right during up and down movement. It provides a stable mechanism.

On the other hand, the trip device 128 is composed of a cylindrical solenoid (128a) for generating an electromagnetic force during the electrical input and a circular rod-shaped plunger (128b) inserted into the central axis, one of the plunger (128a) One end hangs at solenoid center and the other end hangs on one end of latch 25

The test plate 129a is integrally inserted into the side of the transformer 127 so that a lower end thereof is coupled to the printed circuit board, and an upper end thereof is '??' In a bent form, the test pins 129b protrude from the printed circuit boards and are positioned at a slight interval. These are contacted by the pressing of the test button 146.

Referring back to FIGS. 1 to 3, the middle base 130 serves as a cover of the blocking unit assembly 120 and at the same time, a blocking unit support 131 for preventing the flow of the blocking unit 120 is downward. Protruding, formed. The middle base has two blade holders 134 and two ground holders 136, a reset button support plate 139, a reset button 138, and a lens 192 on the top surface. Each of the two supporters 134 is fixed contact point 135 is inserted into each of the middle base upper grooves at regular intervals, and is fixed. The two ground cutoffs 136 are seated at regular intervals on the middle base, and then connected to and fixed to the lowermost fixing bracket 111 by screws. That is, the ground knife support 136 is grounded to the fixing bracket 111. The lens 192 is inserted and seated in a groove of the middle base with a rod-shaped transparent material vertically long, and a lower end thereof penetrates the middle base 130 and has a light emitting diode (LED) on the lower printed circuit board 121; 190 is inserted into the third through-hole 144c of the case 140 and the upper end is exposed to the upper surface of the case (see Fig. 9).

In addition, the reset button support plate 139 seated on the middle base 130 has a hole formed in the center thereof, and a rod-shaped reset button 138 coupled with the spring 138a passes therethrough, and the reset button 138 The bottom of the bottom is formed with a groove around the circular insert is inserted into the button insertion hole (123a) of the reset guide 122 is coupled to the hole 124a of the latch 124 at the center of the reset guide body, the top of the reset button is the middle base Passes through the upper case 140 and protrudes upward through the first through hole 144a of the case.

The case 140 coupled to the upper portion of the middle base 130 has two round plug insertion holes 142 formed on the upper surface and two small holes formed at the bottom of each insertion hole, so that the plug of the home appliance is inserted into the insertion hole 142. The filling part of the cotton plug is coupled to the lower knife holder 134 through the hole in the bottom of the insertion hole 142. In addition, three small through holes are formed between the two plug insertion holes 142, and the upper part of the reset button 138, the lens 192, and the test button 146 protrude from the through holes 144a, 144b, and 144c. do. The lower end of the test button 146 penetrates the case 140 and the middle base 130 to contact the test plate 129a in the blocking unit assembly 120.

Four holes are formed in the case 140, the middle base 130, and the base 110, respectively, at four corners at the same positions, and these parts are combined into one by a fixing screw to form the main body of the product. The packing 152, the plate 154, and the cover 156 are respectively coupled to the upper portion of the case to prevent water droplets from entering the inside of the product.

6 is a circuit diagram of the interrupter assembly. Referring to FIG. 6, in the blocking unit assembly, power is supplied to a printed circuit board using TERMINAL (A, B), which is not a conventional soldering or wire fitting type, and an image current transformer (ZCT) for detecting a current breakdown ( Transformer), a sensitivity current sensing circuit that senses the magnitude of the electromotive force by receiving electromotive force generated from the image current transformer, and outputs a signal corresponding thereto, and amplifies the signal output from the sensitivity current sensing circuit and compares the signal with the reference signal. If the input signal is larger than the reference signal, the dedicated IC IC1 outputs a predetermined control signal, the thyristor Q1 operated according to the control signal output from the dedicated IC, and a smoothing circuit for smoothing the DC voltage supplied from the thyristor. (C5), rectifier circuits D1 to D4 connected to the smoothing circuit to rectify AC voltage to DC voltage, trip coil SOL to conduct current according to the operation of the rectifier circuit, Power supplies is TERMINAL (A, B) are in parallel connection of a voltage surge during inflow, configured surge protection circuit (V1) to protect the internal circuit to bypass the surge voltage. On the other hand, using the LED (L1) 190 indicating the operating state of the earth leakage breaker, the circuit breaker is turned on (RESET) to show the operation state of the outlet. For example, the blocking unit detects the leakage current only in the reset state (depressed state) in which the reset button 132 is pressed. In the blocking assembly, the current transformer ZCT detects a leakage current, and the detected signal is compared and judged by a dedicated IC, and when the leakage current is detected, the output current is directed to magnetize the solenoid 128a of the trip device. Will be generated. The trip device is for blocking the current flow between the movable contact of the movable terminal and the fixed contact of the knife holder when the leakage current is detected.

Operation of the two-hole outlet having a ground fault interrupting function configured as described above is performed as follows. A description will be given with reference to FIGS. 7 to 9.

First, the reset button 138 is an operation operation button that connects the contacts between two terminals (movable terminal and the knife holder) which are separated, and puts the outlet into a normal energized state. The reset button 138 protrudes from the top of the reset button 138. Portion), the spring 138a, which is coupled to the reset button, is compressed between the reset button support plate 139, and the recess formed at the bottom of the reset button 138 is latched 124 inside the button insertion hole of the reset guide 122. It is coupled with the hole 124a of. When the reset button is released, the reset button 138 and the latch 124 are lifted up by the spring restoring force to lift the movable terminal 126 simultaneously with the reset guide 122. The movable contact 126a comes into close contact with the stationary contact 135 attached to the knife holder 134 to form a mechanism of a normal use state in which current flows.

As shown in FIG. 9, the LED is turned on, and the light is transmitted through the lens 192 to the top of the lens 192 on the upper surface of the case so that the light indicating the use state can be checked from the outside.

In order to check whether the ground fault interrupting function is normally operated, the upper part of the test button 146 above the case 140 is pressed in the normal use state by pressing one end of the test plate 129a on the bottom of the test button 129a. ) And the test pin 129b come into contact with each other, a forced short circuit occurs, and the reset button 138, which was caught on the latch 124, by the trip device 128 pulling the latch 124, is raised upward by the spring 138a restoring force. At the same time, the reset guide 122 falls down and the movable contact 126a of the movable terminal 126 and the fixed contact 135 of the cutoff 134 are separated from each other, thereby blocking the current.

When a short circuit occurs in the actual state of use, the transformer 127 detects a balanced breakdown of the input / output current flowing through the movable terminal 126 and judges the signal on the printed circuit board 121 to apply a current to the trip device 128. As a result, the same mechanism is activated to cut off the current. At this time, the light of the LED 190 that is turned on in the normal use state is turned off at the same time as the power is cut off, the user can easily check whether the electrical leakage in the home appliance.

In the above, the configuration and operation of the two-hole outlet having a ground fault interrupting function according to the present invention is shown in accordance with the above description and drawings, but this is only an example and various changes within the scope without departing from the technical spirit of the present invention. And of course, it is possible to change.

According to the present invention, by assembling the core operating parts (blocking assembly) and the assembly parts in a stacked structure having an assembly structure using no wires, assembly time, process quality, procurement and management of parts, etc. Not only in terms of product production, but also in terms of stable performance when using the product, and in case of defects, such as disassembly, verification, and measures, it provides significantly improved performance compared to existing products.

In addition, the light of the light emitting diode, which indicates that the earth leakage blocking function is activated, is transmitted to the outside of the case through the rod-shaped lens to display the use state, thereby providing convenience to the user and excellent assembling property to the operator, as well as the assembly site of the product. The productivity gains from the simplified configuration can be obtained.

Claims (9)

In the two-prong outlet with earth leakage protection: A base (110) having an inner space (112) and having a fixing bracket (111) fixed to an outer bottom surface thereof; In the inner space 112 of the base 110, a circuit breaker assembly 120 having an earth leakage blocking function operation unit formed of blocks, and two wire insertion holes 114 to which wires are coupled are installed. It is coupled to the upper portion of the base 110 serves as a cover of the blocking unit assembly 120 at the same time the upper surface of the two cutlery 134, the two grounding knife receiving 136, and the outlet is coupled to the plug A middle base 130 on which a reset button 138, which is an operation operation button for making an energized state, and the reset button support plate 139 are installed; Each of the two cutlery 134 is provided with a fixed contact 135 at one end thereof, and is inserted into and fixed in the upper groove 132a of the middle base 130, and the two grounded cutlery 136 are attached to the screw. It is fixed to the fixing bracket 111 disposed at the bottom by The second through hole 144b coupled to the middle base 130 and having the first plug hole 144a through which the two plug insertion holes 142 and the reset button 138 protrude, and the test button 146 are installed. A two-hole outlet having a current leakage blocking function comprising a case 140 having a). The method of claim 1, The blocking unit 120 is Two power terminals 122 and transformers 123, trip devices, reset guides, two movable terminals, test plates and test pins are installed on one printed circuit board 121; The reset guide 122 is formed of a pillar-shaped body formed with a button insertion hole 123a into which the reset button 138 is inserted, and two protrusions 123b left and right in the middle of the body, and below the protrusion. A plate-shaped latch 124 having a groove 123c connected to the button insertion hole 123a and a hole 124a inserted into the groove and into which the end of the reset button 138 is inserted, The two power terminals 125 are installed on the printed circuit board 121 to be in contact with the input power side of the two wire insertion holes 114 to receive power from the printed circuit board. The two movable terminals 126 are inserted along a central axis of the transformer 127 and fixed to the printed circuit board 121 to be electrically connected to the power terminal 114. 126a) is positioned above the protrusion 123b of the reset guide, The trip device 128 includes a solenoid 128a for generating an electromagnetic force upon electricity supply, and a cylindrical rod-shaped flanger 128b inserted into the central axis thereof and having one end hooked to the latch 124, The test plate 129a and the test pin 129b are integrally inserted into the side of the transformer 127, and the lower end thereof is coupled to the printed circuit board 121, and the test button 129 is spaced apart from each other. 146) a two-hole outlet having a ground fault breaking function, characterized in that contact by pressing. The method according to claim 1 or 2, The blocking part assembly 120 further includes a light emitting device 190 indicating that the earth leakage blocking function is operated. The two-hole outlet having the earth leakage blocking function A lens 192 of a rod-shaped transparent material installed on the middle base 130 and for transmitting the light of the light emitting device 190 out of the case; And a third through hole (144c) formed in the case so that the upper portion of the lens (192) is exposed outside the case (140). In the two-prong outlet with earth leakage protection: The lowermost layer has a fixing bracket 111 and the base 110, the interior of the base 110, the circuit breaker assembly 120 is composed of a block of the earth leakage blocking function, and the two wire insertion hole 114 is seated The middle base 130 is coupled to the upper portion of the base 110, and grooves are formed on the upper surface of the middle base 130 so that the blade holder 134, the ground knife holder 136, the reset button support plate 139, and the reset are provided. Buttons 138 are inserted and placed, respectively, the middle base 110 has a laminated assembly structure that does not require the connection of the wires are sequentially coupled to the case 140 having two plug insertion openings 142, The base 110 and the middle base 130 and the case 140 are combined into one by four fixing screws at four corners to form a main body. The case 140 is provided with a packing 152, a plate 154, Cover 156 is characterized in that each coupled Two-hole outlet with an earth leakage blocking function. The method of claim 4, wherein The blocking unit assembly 120 has a printed circuit board 121, two power terminals 125, a transformer 127, a tripping device 128, and a movable terminal 126 on the upper surface of the printed circuit board 121. ), The light emitting device 190, the test plate 129a and the test pins (129b) are respectively installed, the earth leakage blocking function characterized in that the reset guide 122 is mounted on the upper portion of the printed circuit board to form a block Two-pronged outlet The method of claim 5, The base 110 has a space 112 in which the blocking unit assembly 120 can be seated, and in the space there is a reset guide that can prevent left and right shake during vertical operation of the reset guide 122. A two-hole outlet having a ground leakage blocking function, characterized in that the guide surface 116 is formed protruding. The method of claim 5, The test plate 129a and the test pin 129b are fixed and connected to the printed circuit board 121, and the test plate 129a is integral with the transformer 127 side in terms of safety of fixing. A two-hole outlet with a ground fault interrupting function, characterized in that is fixed to. The method of claim 5, The reset guide 122 has two legs protruding from the bottom thereof, the printed circuit board is disposed between the legs, and the reset guide 122 legs when the breaker assembly 120 is seated on the base 110. (123d) A two-hole outlet having a ground fault interrupting function, characterized in that the lower end is seated on the inner bottom surface of the base. The method of claim 4, wherein The middle base 130 has a blocking part supporter 131 protruding from a bottom surface thereof to fix the blocking part assembly 120 inside the base through coupling with the base 110, and at the center of the light emitting part. A two-hole outlet having an earth leakage blocking function, characterized in that the lens 192, which has a long transparent bar shape, which can transmit the light of the element 190 to the outside of the upper case, is fixed.

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