KR200399362Y1 - Flug type leakage current circuit breaker - Google Patents

Abstract

The present invention relates to a plug-type earth leakage breaker which is provided in a plug form and cuts off power when a short circuit occurs and can be easily reset, and the present invention is installed in the housing and the housing to operate with a fixed terminal to supply power. A plug type circuit breaker comprising a switch unit including a terminal and a breaker unit which turns off the power by separating the movable terminal of the switch unit from a fixed terminal when detecting a leakage current during energization, wherein the plug type circuit breaker includes a reset unit. The reset unit may include a reset button; A locking plate which is rotatably installed on the reset button and turns on power by contacting a movable terminal of the switch unit with a fixed terminal; A fixing member fixed to the reset button to fix the locking plate together; An elastic member inserted into the fixing member to impart an elastic force to return the reset button to turn on the movable terminal and at the same time to impart a predetermined elastic force to the locking plate; Characterized in that it comprises a.

Description

Plug type leakage current circuit breaker

The present invention relates to a pluggable circuit breaker, and more particularly, to a pluggable circuit breaker having a plug shape, which cuts power when a short circuit occurs and improves the structure so that it can be easily reset.

In general, a plug is a type of electrical component used to connect an outlet, and is widely used as a means of supplying electricity to appliances such as home appliances and industrial equipment (hereinafter referred to as "electric appliances") that use electricity as a power source.

These plugs are used only as a means of functionally supplying electricity to the electric equipment, and thus, when malfunctions and leakage currents occur in the electric equipment, they are not immediately cut off, and the power is disconnected from the main earth leakage breaker provided at the branch point of the electric line. The entire home, factory and office are cut off.

Therefore, a plug that can detect the leakage current generated by the electrical equipment in advance and cut off only the power supplied to the electrical equipment is required, and according to this request, registered utility model No. 319113, "Plug device having the earth leakage blocking function" Was devised.

In the conventional plug device, when the leakage current occurs, the power is disconnected by the solenoid, and the disconnected plug device is interlocked with the lowering of the reset switch as the user presses the reset switch so that the hook hole of the switch arm is caught by the latch hanger of the switch hanger. In conjunction with the rise of the reset switch, the switch hanger on the switch arm is raised to raise the contact bar receiving power from the plug pin to maintain the energization state.

This is a problem that it is difficult to operate the reset switch by hand by using a spring with a high compressive strength of the spring used to lift the contact bar is raised in the center.

In addition, the hanger is raised from the center between the two contact bars by lowering the reset switch, so that the state of energization is maintained, so that the two bars gradually become distorted or open when used for a long time, so that the position of the contact is separated.

Accordingly, there is a need for a pluggable circuit breaker having a new structure that can solve the above problem.

The present invention has been made in view of the above necessity, and an object thereof is to provide a plug-type earth leakage breaker that can be quickly disconnected when a leakage current occurs, and can be easily reset and energized with a small force in a disconnected state.

In addition, another object of the present invention is to provide a plug-type earth leakage breaker for guiding the contact of the movable terminal by the elastic force of the movable terminal during disconnection due to leakage current so as not to be separated from the energized position with the fixed contact. do.

The present invention for achieving the above object is a housing, a switch unit including a fixed terminal and a movable terminal installed in the housing for supplying power, and the movable terminal of the switch unit when the leakage current is detected during energization is separated from the fixed terminal A pluggable circuit breaker comprising a circuit breaker for turning off a power supply, the pluggable circuit breaker includes a reset unit, wherein the reset unit comprises: a reset button;

A locking plate which is rotatably installed on the reset button and turns on power by contacting a movable terminal of the switch unit with a fixed terminal;

A fixing member fixed to the reset button to fix the locking plate together;

An elastic member inserted into the fixing member to impart an elastic force to return the reset button to turn on the movable terminal and at the same time to impart a predetermined elastic force to the locking plate; Characterized in that it comprises a.

Here, the free end of the movable terminal is further provided with an operating member forming a locking projection,

The locking plate is preferably configured to include a locking groove to which the locking projection is locked, a rotation protrusion for rotation on both sides, and a pressing piece for pressing the elastic member.

And the fixing member includes a support jaw for supporting the pivoting projection of the locking plate on one side, an inclined surface for determining the rotation range of the locking plate supporting the support jaw, and a spring ball formed to enter and exit the elastic member It is preferable to.

In addition, the reset button is provided with a fixing groove on the inner side,

It is preferable that the fixing member is provided on the outer surface of the fixing projection to be fitted into the fixing groove.

In addition, the reset unit is further provided with a button guide for guiding the reset operation of the reset button,

The button guide may further include an inner step of which the reset button is inserted into the reset button to expose a portion thereof, and a coupling protrusion coupled to the housing to prevent flow of the button guide.

In addition, the switch unit is composed of a fixed terminal and a movable terminal, the movable terminal is further provided with an operating member for switching the free terminal at the same time,

The actuating member is provided at the center, and is provided with a locking protrusion protruding to turn on the movable terminal by the reset operation of the reset unit, and is provided at both sides of the locking protrusion, and prevents the movable terminal from being separated by elastic force. It is preferable that the separation prevention protrusion is further provided.

In addition, the fixed terminal is preferably integrally formed with a plug pin for receiving power.

In addition, the housing in which the switch unit is installed, the switch mounting portion is installed to be spaced apart from the movable terminal, the blocking portion installation groove is installed in the center of the switch mounting portion, the switch mounting portion is located in the center of the blocking It is preferably provided to be spaced apart from the portion, the engaging portion of the reset portion is guided to the protrusion formed to enable the reset operation is preferably further provided.

In addition, the switch mounting portion is provided in the separation prevention groove and the separation prevention groove provided on the outer periphery of the entrance portion to guide the separation preventing projection provided in the operating member, and is prevented from being separated by the elastic force of the movable terminal. It is preferable that the separation prevention stopper and the separation prevention plate for preventing the movable terminal is separated from the outside.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the description of the present invention, terms defined are defined in consideration of functions in the present invention, it should not be understood as a meaning limiting the technical components of the present invention.

1 is a perspective view showing a preferred embodiment according to the plug-type earth leakage breaker of the present invention, Figure 2 is a perspective view showing a case in which the case according to the plug-type earth leakage breaker of the present invention is removed, Figure 3 is The exploded perspective view shown.

And, Figure 4 is an exploded perspective view showing an enlarged reset portion of the plug-type earth leakage breaker according to the present invention, Figure 5 is a partially cutaway perspective view showing the separation preventing means of the movable contact of the plug-type earth leakage breaker according to the present invention, Figure 6 Is a perspective view showing a plug pin integrated fixed terminal of the plug-type earth leakage breaker according to the present invention.

In addition, Figure 7a to 7c is an operating state diagram of the plug-type earth leakage breaker according to the present invention.

As shown in FIG. 1, the plug type earth leakage charger 1 is provided to expose the plug pin 310 to the front surface by combining a case 10 made of two insulators. And the reset button 410 is exposed on the back. In addition, the test button 230 is exposed where the reset button 410 is located. The front side is the direction in which the plug is located, and the rear side is the opposite direction of the front side.

Figure 2 shows a plug type circuit breaker with the case removed. It is provided with a PCB in the center and the housing 100 is installed on the front. And the switch unit 300 is fixed to both sides of the housing 100, the blocking unit 200 is installed in the center of the switch unit 300. In addition, the reset unit 400 is installed on the rear surface of the PCB to enter the center of the switch unit 300 on the front to turn on or off the switch unit 300.

Therefore, the housing 100 has a switch mounting unit 110 in which the switch unit 300 is installed at both sides, and a blocking unit installation groove in which the blocking unit 200 is installed at the center of the switch installation unit 110 ( 120 is provided in the center of the switch installation unit 110 to be spaced apart from the blocking unit installation groove 120, the reset unit 400 is guided through the exit formed through the protruding to be reset operation ( 130 is provided. (See Figure 3)

In addition, the switch installation unit 110 is provided on the outer circumference of the access unit 130 to guide the departure prevention protrusion 342 provided in the operation member 340 of the switch unit 300 to be described later, as shown in FIG. A departure prevention groove 111 is provided. In addition, the separation prevention groove 111 is provided, and the separation prevention stopper 112 is provided to prevent the separation from the position that can be contacted with the fixed terminal 320 to be described later by the elastic force of the movable terminal 330 to be described later. In addition, the departure prevention plate 113 to prevent the departure of the movable terminal 330 to be described later is provided.

As shown in FIG. 3, the blocking unit 200 is a detector 210 that detects a leakage current and an actuator 220 that is operated by a signal detected by the detector 210 to turn off the power. It is provided. In this case, the sensing unit 210 uses a zero phase current transformer (ZCT) to detect a leakage current so that a wire passes through the center of the ZCT. In addition, the actuator 220 may be a solenoid having an operation pin 221 that moves forward and backward by using a magnetic force.

In addition, the blocking unit 200 is further provided with a test button 230 for randomly generating a leakage current to check the operation of the earth leakage breaker.

Since the components of the blocking unit are well known technologies, detailed descriptions of the operations will be omitted.

The reset unit 400 is provided with a reset button 410 to operate by pressing as shown in Figure 3 or 4, the reset button 410 is rotatably installed, to operate the switch unit 300 A locking plate 420 for turning on the power, a fixing member 430 fixed to the reset button 410 and fixing the locking plate 420 together, and an elastic force giving a predetermined elastic force to the locking plate 420. It is provided as a button guide 450 for guiding the member 440 and the reset button 410.

The reset button 410 is provided with an insulator and forms a space portion 411 of a predetermined size on one side. In addition, a fixing groove 413 into which the fixing protrusion 434 of the fixing member 430 to be described later is inserted is provided on the inner wall surface of the space 411. In addition, the pressing portion 412 is formed to be exposed to the outside of the earth leakage breaker case 10 to protrude on the other side by hand.

The locking plate 420 is formed by bending the plate body in the form of a letter “A” so that the locking protrusion 341 provided in the operation member 340 of the switch unit 300, which will be described later, is inserted into the long portion. A locking groove 421 is provided. And the bent portion is formed to protrude to both sides is provided with a rotation projection 422 to be rotated to be caught on the support jaw 431 of the fixing member 430 to be described later. In addition, the short portion is provided with a pressing piece 423 for pressing the elastic member 440. Therefore, the elastic member 440 presses the pressure piece 423 with a constant force to have an elastic force acting in one direction on the locking plate 420.

The fixing member 430 is provided with a supporting jaw 431 on one side to rotatably couple the locking plate 420. In addition, an inclined surface 432 is provided to contact the support jaw 431 and determine a rotatable rotation angle of the locking plate 420 that is rotatably fastened to the support jaw 431. Here, the locking plate 420 can rotate in the inclination angle range of the inclined surface 423. In addition, a spring hole 433 penetrating the center to insert the elastic member 440 is formed. A fixing protrusion 434 is provided to be inserted into and fixed to the fixing groove 413 of the reset button 410.

 The elastic member 440 restores the reset button 410 pressed by a constant force, and imparts an elastic force in one direction to the locking plate 420. Therefore, the elastic member 440 may be a compression spring.

The reset unit 400 further includes a button guide 450 formed therethrough so that the reset button 410 is guided in the reset operation direction, so that only the pressing part 412 of the reset button 410 is exposed. Here, the inner step 451 is provided at one side so that the reset button 410 is not separated from the inside of the button guide 450. And the other side coupling protrusion 452 is provided to be coupled to the housing 100. Therefore, the coupling groove (not shown) is provided in the housing so that the coupling protrusion 452 can be coupled.

As shown in FIG. 3 or 5, the switch unit 300 includes a plug pin 310 that receives power and a fixed terminal 320 connected to the plug pin 310, and the fixed terminal 320. The movable terminal 330 to be switched and the operation member 340 fixed to the two movable terminals and linked to the reset operation of the reset unit 400 are provided. Here, the switch unit 300 is further provided with a grounding pin pin 350.

The plug pin 310 is formed integrally with the fixed terminal 320 as shown in FIG. A fixed contact point 321 is provided at the fixed terminal 320. In addition, the movable terminal 330 is fixed to the free end by the operating member 340 but the movable contact 331 together.

Therefore, the operation member 340 is fixed to the movable terminal 320 on both sides, and in the center of the locking projection (421) to be inserted into the locking groove 421 provided in the locking plate 420 of the reset unit 400 ( 341) is formed. In addition, the separation preventing protrusions 342 are formed on both sides of the locking protrusion 341. Here, the release preventing protrusion 342 prevents the movable contact 331 from being separated from the position where the movable contact 331 can contact the fixed contact 321 by the restoring force of the movable terminal 330.

Hereinafter, the operation of the plug type circuit breaker according to the preferred embodiment of the present invention will be described.

As shown in FIG. 7A, the locking protrusion 341 of the operating member 340 is inserted into the locking groove 421 of the locking plate 420 to fix the contact point of the fixed terminal 320 by the elastic restoring force of the elastic member 440. 321 and the movable contact 331 of the movable terminal 330 is in contact with and electrically connected.

Then, when a leakage current occurs in an electric device or a wire, as shown in 7b, the sensing unit 210 detects the leakage current to operate the actuator 220. The actuator 220 advances the operation pin 221 included therein to push the locking plate 420 to return to the original state. Then, the locking protrusion 341 of the operating member 340 is separated from the locking groove 421 of the locking plate 420. At this time, after the locking protrusion 341 is separated from the locking groove 421, the locking protrusion 341 is in contact with the tip of the locking protrusion 341 by the elastic force of the elastic member 440.

Since the separated operation member 340 is heard by the elastic force of the movable terminal 330 is disconnected at the same time as the movable contact 331 of the movable terminal 330 is spaced apart from the fixed contact 321 of the fixed terminal 320. At this time, the movable terminal 330 spaced apart is guided and separated by the separation prevention groove 111 provided in the housing, the separation prevention projection 342 of the operating member 340 fixing the free end is provided in the separation prevention groove 111. After stopping by a predetermined distance by the prevention stopper 112, it stops. That is, the movable contact 331 is spaced apart only from the fixed contact 321 by a predetermined distance. And the process performed at the time of the leakage current operation is instantaneous.

Then, the cause of the disconnected state is analyzed to remove the disconnected power source.

Hereinafter, the reset operation of the plug type circuit breaker in the disconnected state will be described.

When pressing the pressing part 412 provided in the reset button 410 of the reset unit 400 is guided from the inside of the button guide 450, the fixing member 430 fixed to the inside of the reset button 410 together with the elastic member It is pressurized while overcoming the elastic force of 440. And the locking plate 420 fixed by the reset button 410 and the fixing member 430 is pressed together. At this time, the locking plate 420 is a force in one direction by pressing the pressing piece 423 by the elastic force of the elastic member 440.

Thereafter, by pressing the reset button 410, the locking plate 420 proceeds while contacting the tip portion of the locking protrusion 341 of the operation member 340. If it continues, the locking protrusion 341 is fitted by the locking groove 421 of the locking plate 420. In this case, the locking protrusion 341 is inserted into the locking groove 421 by the elastic force of the elastic member 440. At this time, the departure prevention stopper 112 is moved together with the movable contact 331 of the operation member 340 by friction with the locking plate 420 to prevent the position is separated.

After releasing the pressing state of the reset button 410, the reset button 410, the fixing member 430 and the locking plate 420 by the elastic force of the elastic member 440 is returned together. And the operation member 340 is returned together by pulling the locking projection 341 inserted into the locking groove 421 of the locking plate 420. In addition, the elastic force of the movable terminal 330 having the operating member 340 provided at the free end is overcome, and the movable contact 331 of the movable terminal 330 is in contact with the fixed contact 321 of the fixed terminal 320. Therefore, the elastic force of the movable terminal 330 is provided to overcome by the elastic force of the elastic member 440.

After that, the power is maintained on by the elastic member.

Although the technical idea of the pluggable circuit breaker of the present invention has been described with the accompanying drawings, this is illustrative of the best embodiment of the present invention and is not intended to limit the present invention. Therefore, it is apparent that anyone with ordinary skill in the art can make various modifications and imitations such as dimensions, shapes and structures without departing from the scope of the technical idea of the present invention.

A plug-type earth leakage breaker comprising a housing, a switch unit installed in the housing and switched to a fixed terminal and a movable terminal, and a disconnecting unit to turn off the power of the switch unit when detecting a leakage current during energization. The earth leakage circuit breaker is provided with a reset part, wherein the reset part is provided with a reset button for pressing and operating the reset part, the reset button being rotatably installed, a locking plate for turning on the power by operating the switch part, and the reset button. The plug-type earth leakage breaker of the present invention, which is fixed and includes a fixing member for fixing the locking plate together, and an elastic member for imparting a constant elastic force to the locking plate, is quickly disconnected when a leakage current occurs, and with a small force in the disconnection state. There is also an effect that can be easily reset and energized.

In addition, another object of the present invention is to guide the position of the contact of the movable terminal by the elastic force of the movable terminal at the time of disconnection by the leakage current has the effect of being separated from the position that can be energized with the fixed contact.

1 is a perspective view showing a preferred embodiment according to the plug-type earth leakage breaker of the present invention.

Figure 2 is a perspective view showing a state in which the case is removed according to the plug-type earth leakage breaker of the present invention.

FIG. 3 is an exploded perspective view showing an exploded view of FIG. 2;

Figure 4 is an exploded perspective view showing an enlarged reset of the plug-type earth leakage breaker according to the present invention.

Figure 5 is a partially cutaway perspective view showing the departure prevention means of the movable contact of the plug-type earth leakage breaker according to the present invention.

Figure 6 is a perspective view showing a plug pin integrated fixed terminal of the plug-type earth leakage breaker according to the present invention.

7a to 7c is an operating state of the plug-type earth leakage breaker according to the present invention.

<Description of Symbols for Major Parts of Drawings>

100: housing 110: switch mounting portion

111: departure prevention groove 112: departure prevention stopper

113: departure preventing plate 120: blocking unit installation groove

130: entrance 200: blocking

210: detector 220: actuator

221: operation pin 230: test button

300: switch unit 310: plug pin

320: fixed terminal 321: fixed contact

330: movable terminal 331: movable contact

340: operating member 341: locking projection

342: departure prevention protrusion 400: reset unit

410: reset button 411: space portion

412: pressing part 413: fixing groove

420: jam plate 421: jam groove

422: rotating projection 423: pressure piece

430: fixing member 431: support jaw

432: slope 433: spring ball

434: fixing protrusion 440: elastic member

450: button guide 451: inner step

452: engaging projection

Claims (9)

The plug is composed of a housing, a switch unit installed in the housing and including a fixed terminal and a movable terminal for supplying power, and a blocking unit for turning off the power by separating the movable terminal of the switch unit from the fixed terminal when detecting leakage current during energization. In the type of earth leakage breaker, The plug type circuit breaker includes a reset unit, wherein the reset unit includes a reset button; A locking plate which is rotatably installed in the reset button and turns on the power by contacting the movable terminal of the switch unit with the fixed terminal; A fixing member fixed to the reset button to fix the locking plate together; An elastic member inserted into the fixing member to impart an elastic force to return the reset button to turn on the movable terminal and at the same time to impart a predetermined elastic force to the locking plate; Plug-type earth leakage breaker characterized in that it comprises a. The method of claim 1, The free end of the movable terminal is further provided with an operating member forming a locking projection, The locking plate is a plug type earth leakage breaker, characterized in that it comprises a locking groove for engaging the locking projections, a rotating projection for rotation on both sides, and a pressing piece for pressing the elastic member. The method of claim 2, The fixing member includes a supporting jaw for supporting the pivoting projection of the locking plate on one side, an inclined surface for determining a rotation range of the locking plate for supporting the supporting jaw, and a spring ball formed to enter and exit the elastic member. Plug type circuit breaker, characterized in that the. The method of claim 3, wherein The reset button is provided with a fixing groove on the inner side, The fixing member is a plug-type circuit breaker, characterized in that the fixing projection is inserted into the fixing groove is provided on the outer surface. The method of claim 4, wherein The reset unit is further provided with a button guide for guiding the reset operation of the reset button, The button guide may further include an inner step of which the reset button is inserted into the reset button, and a part of the plug guide is coupled to the housing to prevent the flow of the button guide. The method of claim 4 The switch unit is composed of a fixed terminal and a movable terminal, the movable terminal is further provided with an operating member for switching the free terminal at the same time, The actuating member is provided at the center, and is provided with a locking protrusion protruding to turn on the movable terminal by the reset operation of the reset unit, and is provided at both sides of the locking protrusion, and prevents the movable terminal from being separated by elastic force. Plug-type earth leakage breaker, characterized in that the separation prevention protrusion is further provided. The method of claim 6, The fixed terminal is a plug-type circuit breaker, characterized in that the plug pin for receiving the power is formed integrally. The method of claim 7, wherein The housing in which the switch unit is installed includes a switch mounting unit in which the movable terminal is spaced apart, a blocking unit mounting groove in which the blocking unit is installed in the center of the switch mounting unit, and the blocking unit in the center of the switch mounting unit. It is provided spaced apart, the plug-type earth leakage breaker, characterized in that the locking portion is guided to the reset portion is further provided to the protruding to form a reset operation. The method of claim 8, The switch installation portion is provided in the separation prevention groove and the separation prevention groove provided on the outer periphery of the entrance portion to guide the separation preventing projection provided in the operating member, the separation to prevent the separation by the elastic force of the movable terminal. Plug prevention circuit breaker, characterized in that the prevention stopper and the separation prevention plate for preventing the movable terminal is separated from the outside is further provided.