KR20210117806A - Blocking element and molded-case circuit breaker including the same - Google Patents

Abstract

Disclosed are a blocking member and a circuit breaker for a wire including the same. According to an embodiment of the present invention, the circuit breaker for a wire includes the blocking member. The blocking member includes a plurality of extensions and cuts off gas generated with an arc in multiple stages. Accordingly, the gas generated along with the arc does not remain inside the circuit breaker for the wire, and the gas can be discharged to the outside of the circuit breaker for the wire.

Description

Blocking element and molded-case circuit breaker including the same

The present invention relates to a blocking member and a circuit breaker including the same, and more particularly, to a blocking member having a structure capable of preventing gas generated with an arc from remaining inside, and a circuit breaker including the same.

A circuit breaker is a type of circuit breaker, and when abnormal currents such as short circuit or overcurrent occur, it is a device that can cut off electricity to prevent electrical accidents.

A general circuit breaker for wiring includes a fixed contact and a movable contact inside. While the normal current, not the above-described abnormal current, flows, the stationary contact and the movable contact are in contact with each other and conduction is possible. In addition, when the above-described abnormal current flows, the fixed contact and the movable contact are spaced apart to prevent conduction.

When the fixed contact and the movable contact are separated, an arc is generated by the abnormal current flowing between the fixed and movable contact. The generated arc is discharged to the outside of the circuit breaker after going through an extinguish process.

At this time, gas is also generated along with the arc. In the case of an arc, it may be induced to be discharged to the outside by forming a bar, which may be defined as a flow of electrons, such as a magnetic field. On the other hand, since the gas does not have a separate polarity, it is difficult to induce discharge in an arc-like manner.

A process in which arcs and gases generated in the circuit breaker 1000 according to the prior art are discharged to the outside will be described with reference to FIGS. 1 to 5 .

The circuit breaker 1000 for wiring according to the prior art includes a housing 1100 , a mechanism 1200 , a trip unit 1300 , and a blocking member 1400 .

The plurality of inner cases 1120 are accommodated in the outer case 1100 . A hole (not shown) is formed in the inner case 1120 . Gas generated by separating a fixed contact (not shown) and a movable contact (not shown) disposed in the inner space of the inner case 1120 is discharged from the inner case 1120 through the hole (not shown).

The discharged gas should be discharged to the outside of the housing 1100 , and it is not preferable to stay in the inner space of the outer case 1110 . Therefore, a structure for preventing the gas discharged from the inner case 1120 from flowing into the inner space of the outer case 1110 is required.

The blocking member 1400 is positioned adjacent to the arc extinguishing unit 1320 provided inside the housing 1100 to prevent the generated arc gas from flowing into the housing 1100 .

Specifically, the blocking member 1400 is positioned between the plurality of inner cases 1120 provided in the mechanism 1200 . The blocking member 1400 includes a first extension part 1410 , a second extension part 1420 , and a third extension part 1430 , and is disposed between the hole (not shown) and the inner space of the outer case 1110 . block the chimney

A predetermined gap may be formed between the outer case 1110 and the blocking member 1400 . The gas discharged from the inner case 1120 may flow along the clearance and may be discharged to the outside of the housing 1100 .

In this case, the blocking member 1400 provided in the circuit breaker 1000 according to the prior art is disposed between the plurality of inner cases 1120 and spaced apart from the lower surface of the outer case 1100 . Accordingly, a predetermined space is formed between the blocking member 1400 and the lower surface of the outer case 1100 .

Accordingly, a portion of the gas flowing along the gap stays in the space, that is, the retention space 1330 . Accordingly, the gas to be discharged remains in the inner space of the outer case 1100 , thereby increasing contamination and reducing insulation resistance. This may reduce the operational reliability of the circuit breaker 1000 for wiring.

Korean Patent Document No. 10-1320770 discloses an electric shut-off device and a method for cooling the dissipated gas of the electric shut-off device. Specifically, an electric shut-off device having a structure in which the generated gas can be mixed with a cooling gas accommodated therein, cooled and flowed into the blocking chamber, and the like are disclosed.

However, this type of electrical circuit breaker only suggests a method for cooling the generated gas, and does not provide a measure for preventing the generated gas from remaining inside the circuit breaker.

Korean Patent Document No. 10-1728496 discloses a branch circuit breaker having an arc gas blocking unit. Specifically, a branch circuit breaker having a structure for preventing the generated gas from being transferred to an own ship bus bar through an arc gas blocking unit having a plurality of barrier ribs on the upper portion of the front case is disclosed.

However, this type of branch circuit breaker only suggests a method for preventing the generated gas from being transferred to the own bus bar. That is, the prior literature has a limitation in that it does not suggest a method for preventing the generated gas from remaining in the internal space of the branch circuit breaker.

Korean Patent Document No. 10-1320770 (2013.10.21.) Korean Patent Document No. 10-1728496 (2017.04.19.)

An object of the present invention is to provide a blocking member having a structure capable of solving the above-described problems and a circuit breaker for wiring including the same.

First, an object of the present invention is to provide a blocking member having a structure that can prevent gas generated with an arc from remaining in an internal space, and a circuit breaker for wiring including the same.

In addition, an object of the present invention is to provide a blocking member having a structure capable of preventing damage to various components by gas generated with the arc and a circuit breaker for wiring including the same.

Another object of the present invention is to provide a blocking member having a structure capable of improving operational reliability and a circuit breaker including the same.

In addition, an object of the present invention is to provide a blocking member having a structure capable of blocking gas generated with an arc in multiple stages and a circuit breaker for wiring including the same.

Another object of the present invention is to provide a blocking member having a structure in which design changes can be minimized and a circuit breaker including the same while achieving the above object.

In order to achieve the above object, the present invention, a coupling portion; a main extension part continuous with the coupling part and extending in a direction opposite to the coupling part; and a sub-extension part continuous with the coupling part, spaced apart from the main extension part, and continuous in a direction opposite to the coupling part, wherein the main extension part is a space positioned between arc extinguishing parts positioned adjacent to each other and a main space, wherein the sub extension provides a blocking member extending to surround the main space.

In addition, the main extension portion of the blocking member may include: a first main arm that is continuous with the coupling portion and extends in a direction opposite to the coupling portion; a second main arm that is continuous with the coupling part and extends in another direction opposite to the direction in which the first main arm extends; a third main arm continuous with the second main arm and extending at a predetermined angle with the second main arm; and a fourth main arm that is continuous with the third main arm, forms a predetermined angle with the third main arm, and extends in the one direction in which the first main arm extends.

In addition, the main space portion of the blocking member may be surrounded by the second main arm, the third main arm, and the fourth main arm.

In addition, the predetermined angle formed between the second main arm and the third main arm of the blocking member is 90° or less, and the predetermined angle formed between the third main arm and the fourth main arm is 90° or less. can

In addition, the sub-extension of the blocking member may include: a first sub-arm that is continuous with the coupling part and extends in a direction opposite to the coupling part; a second sub-arm that is continuous with the first sub-arm, forms a predetermined angle with the first sub-arm, and extends in a direction opposite to the coupling part; and a third sub-arm that is continuous with the second sub-arm, forms a predetermined angle with the second sub-arm, and extends in a direction in which the third main arm extends.

In addition, the first sub-arm and the second sub-arm of the blocking member are spaced apart from the second main arm in a direction opposite to the main space portion, and the first sub-arm and the second sub-arm and the second sub-arm are spaced apart from each other. A first sub-space portion that is a space surrounded by the first sub-arm, the second sub-arm, and the second main arm may be formed between the second main arms.

In addition, the third sub-arm of the blocking member is spaced apart from the third main arm in a direction opposite to the main space, and between the third sub-arm and the third main arm, the third sub-arm and a second sub-space that is a space surrounded by the third main arm.

In addition, a coupling hole may be formed through the inside of the coupling portion of the blocking member.

In addition, the present invention, a frame having a space formed therein; a plurality of inner cases accommodated in the space of the frame and having arc discharge holes through which the generated arc is discharged; And between the plurality of the inner case, it is located adjacent to the arc discharge hole, comprising a blocking member for blocking the generated gas, the inside of the inner case, the fixed contact is electrically connected to the outside; a movable contact positioned adjacent to the fixed contact and movably provided in a direction toward the fixed contact or away from the fixed contact; and an arc extinguishing unit positioned adjacent to the fixed contact point and the arc discharge hole to extinguish the generated arc, the blocking member comprising: a main space communicating with the arc discharge hole; a main extension surrounding the main space; And it provides a circuit breaker for wiring including a sub extension surrounding the main extension.

In addition, the frame of the circuit breaker may include: an upper frame covering the space from an upper side; and a lower frame coupled to the upper frame at a lower side of the upper frame, wherein the blocking member is accommodated in the lower frame and positioned adjacent to a lower base forming a lower surface of the lower frame. can

In addition, the main extension portion of the blocking member of the circuit breaker for wiring, a coupling portion coupled to the inner case; a first main arm connected to the coupling part and extending upwardly; a second main arm connected to the coupling part and extending downwardly; a third main arm that is continuous with the second main arm and extends toward one side; and a fourth main arm that is continuous with the third main arm and extends upward, wherein the main space includes the first main arm. It may be surrounded by an arm, the second main arm, the third main arm, and the fourth main arm.

In addition, the sub-extension of the blocking member of the circuit breaker may include: a first sub-arm connected to the coupling part and extending obliquely downward; a second sub-arm that is continuous with the first sub-arm and extends downward; and a third sub-arm that is continuous with the second sub-arm and extends toward the side from which the second main arm extends.

In addition, the first sub-arm and the second sub-arm of the sub-extension of the circuit breaker are spaced apart from the second main arm of the main extension in a direction opposite to the main space, and a first sub-arm is disposed therebetween. A sub space may be formed, and the third sub arm of the sub extension may be spaced apart from the third main arm of the main extension in a direction opposite to the main space, and a second sub space may be formed therebetween. have.

In addition, the plurality of inner cases positioned adjacent to each other may be partially accommodated in the second sub-space of the circuit breaker.

In addition, the circuit breaker may include a trip part coupled to one side of the frame and energably connected to the fixed contact point, and the blocking member may be located adjacent to the trip part.

According to an embodiment of the present invention, the following effects can be achieved.

First, a blocking member is provided between the plurality of inner cases in which arcs and gases are generated. The blocking member includes a main space portion communicating with the inner space of the inner case. The main space portion communicates with the space formed between the inner cases positioned adjacent to each other.

At this time, the blocking member is inserted into the space formed between the inner cases positioned adjacent to each other, and the space is filled. Accordingly, the gas introduced into the main space does not remain in the space and flows toward the arc discharge hole.

Accordingly, the gas generated together with the arc may be discharged to the outside through the arc discharge hole without diffusing or remaining in the inner space of the circuit breaker.

In addition, the gas generated through the above-described configuration does not diffuse or remain in the internal space of the circuit breaker, but is discharged toward the arc discharge hole. That is, the time for the gas generated in the inner space of the inner case and flowing into the main space to stay in the inner space of the circuit breaker for wiring is minimized.

Accordingly, the contact time between the various components accommodated in the internal space of the circuit breaker and the generated gas is minimized. As a result, the various components are not damaged by the generated gas.

In addition, as the generated gas is discharged after staying in the internal space of the circuit breaker for a minimum time, damage to various components of the circuit breaker can also be minimized.

This allows the various components to operate as expected. As a result, the operational reliability of the circuit breaker for wiring can be improved.

In addition, the blocking member includes a main extension and a sub extension. The main extension seals the first space formed between the inner cases adjacent to each other. The sub extension seals the second space formed between the inner cases adjacent to each other.

The first space communicates with the main space portion. In addition, the first space and the second space communicate with each other. Therefore, the gas introduced into the main space is primarily blocked from diffusion and remaining in the main extension accommodated in the first space.

In addition, the gas that has passed through the first space is secondarily blocked from diffusion and remaining by the sub-extension accommodated in the second space. That is, both the first space and the second space located on the path through which the generated gas flows toward the arc discharge hole are filled by the blocking member.

Accordingly, the diffusion and residual of the generated arc can be blocked in multiple stages.

Further, the blocking member is positioned between the inner cases adjacent to each other. The coupling part, the main extension part, and the sub extension part provided in the blocking member may be formed in a shape corresponding to the shape of the space formed between the inner cases adjacent to each other. That is, in order to provide the blocking member, an excessive structural change of the entire circuit breaker is not required.

Accordingly, while effectively blocking the generated gas, the structural change of the circuit breaker for wiring can be minimized. Accordingly, the blocking member may be applied to the conventional circuit breaker, thereby improving the degree of design freedom and reducing the time and cost required for manufacturing.

1 is an exploded perspective view showing a circuit breaker for wiring according to the prior art.
Fig. 2 is a side cross-sectional view showing the inside of the circuit breaker for wiring of Fig. 1;
Fig. 3 is a front cross-sectional view showing the inside of the circuit breaker for wiring of Fig. 1;
4 is a perspective view illustrating a blocking member provided in the circuit breaker for wiring of FIG. 1 .
Fig. 5 is a side view showing the blocking member of Fig. 4;
6 is a perspective view showing a circuit breaker for wiring according to an embodiment of the present invention.
Fig. 7 is a front view showing the circuit breaker for wiring of Fig. 6;
Fig. 8 is a side cross-sectional view showing the circuit breaker for wiring of Fig. 6;
Fig. 9 is an exploded perspective view showing the circuit breaker for wiring of Fig. 6;
Fig. 10 is a side cross-sectional view showing the circuit breaker for wiring of Fig. 6;
11 is a perspective view illustrating a blocking member provided in the circuit breaker of FIG. 6 .
Fig. 12 is a perspective view from another angle showing the blocking member of Fig. 11;
Fig. 13 is a side view showing the blocking member of Fig. 11;
14 is a front cross-sectional view illustrating a process in which an arc is discharged from the inside of the circuit breaker for wiring having a blocking member according to an embodiment of the present invention.

Hereinafter, a blocking member and a circuit breaker including the same according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

In the following description, in order to clarify the characteristics of the present invention, descriptions of some components may be omitted.

1. Definition of terms

The term "breaker" used in the following description refers to any device capable of cutting off current when detecting leakage current or overcurrent, such as an earth leakage breaker or a circuit breaker for wiring.

The term "normal current" used in the following description means a current flowing in a normal state, in which the circuit breaker does not perform a blocking operation.

The term “abnormal current” used in the following description refers to a current other than a normal current in which the circuit breaker performs a blocking operation. The abnormal current may include a leakage current, an overcurrent, an undercurrent, and the like.

The term "arc" used in the following description refers to a plasma of electrons and ions generated when electrodes that are in contact with each other and are energized are spaced apart.

As used in the following description, the term "gas" means any gas that is generated with an arc or is generated as the arc is extinguished.

The terms “front side”, “rear side”, “left”, “right”, “top” and “bottom” used in the following description are understood with reference to the coordinate system shown in FIGS. 6, 8 and 11 . will be

2. Description of the configuration of the circuit breaker 10 for wiring according to an embodiment of the present invention

6 to 10 , the circuit breaker 10 for wiring according to an embodiment of the present invention includes a frame 100 , a mechanism 200 , a trip unit 300 , an energization unit 400 , and an arc extinguishing unit. (500).

11 to 13 , the circuit breaker 10 for wiring according to an embodiment of the present invention includes a blocking member 600 .

Hereinafter, each configuration of the circuit breaker 10 for wiring according to an embodiment of the present invention will be described with reference to the accompanying drawings, but the blocking member 600 will be described as a separate clause.

(1) Description of the frame 100

The frame 100 forms the outer shape of the circuit breaker 10 for wiring. In other words, the frame 100 functions as a housing of the circuit breaker 10 for wiring.

The frame 100 is a portion where the circuit breaker 10 for wiring is directly exposed to the user. Therefore, the frame 100 is preferably formed of an insulating material such as plastic or synthetic resin. Accordingly, it is possible to prevent a safety accident that may occur when current is arbitrarily passed through the frame 100 .

A space is formed inside the frame 100 . In the space, when an abnormal current is energized, various components for blocking the energization and extinguishing the generated arc may be mounted.

The inside of the frame 100 is electrically connected to the outside. The connection is achieved by the fixed contact point 411 passing through the inside and outside of the frame 100 and coupled to the frame 100 .

The trip unit 300 is coupled to one side of the frame 100, the front side in the illustrated embodiment. The trip unit 300 may be electrically connected to the conducting unit 400 accommodated in the frame 100 .

In the illustrated embodiment, the frame 100 includes an upper frame 110 , a lower frame 120 , and an arc discharge hole 130 .

The upper frame 110 forms an upper side of the frame 100 . The upper frame 110 is coupled to the lower frame 120 to form the frame 100 .

A space is formed inside the upper frame 110 . The space communicates with a space formed inside the lower frame 120 .

The mechanism 200 may be partially accommodated in the space of the upper frame 110 .

An opening is formed on one side of the upper frame 110 opposite to the lower frame 120 , and on the upper side in the illustrated embodiment. A lever member provided in the mechanism 200 may pass through the opening.

Accordingly, the lever member is exposed to the outside, so that the user can easily visually recognize whether the circuit breaker 10 for wiring is operating.

The lower frame 120 forms the lower side of the frame 100 . The lower frame 120 is coupled to the upper frame 110 to form the frame 100 .

A space is formed inside the lower frame 120 . The space communicates with a space formed inside the upper frame 110 .

The mechanism 200 may be partially accommodated in the space of the lower frame 120 . In addition, the inner case 210 accommodating the energizing part 400 is accommodated in the space of the lower frame 120 .

As will be described later, a plurality of inner cases 210 may be provided. The plurality of inner cases 210 are spaced apart from each other in one direction in the space of the lower frame 120 in the left and right directions in the illustrated embodiment and are arranged in parallel.

The lower frame 120 includes a lower base 121 .

The lower base 121 forms one surface of the lower frame 120 , a lower surface in the illustrated embodiment. The lower base 121 supports the inner case 210 and the blocking member 600 from the lower side. The inner case 210 and the blocking member 600 are positioned adjacent to the lower base 121 .

The space of the lower frame 120 communicates with the inner space of the inner case 210 . The gas generated along with the arc in the inner space of the inner case 210 may be introduced into the space of the lower frame 120 .

The space of the lower frame 120 communicates with the outside. The gas introduced from the inner space of the inner case 210 may be discharged to the outside.

In the circuit breaker 10 for wiring according to an embodiment of the present invention, the residual gas introduced into the space of the lower frame 120 can be prevented. A detailed description thereof will be provided later.

The arc discharge hole 130 is a passage through which the arc generated inside the inner case 210 is extinguished and then discharged. In addition, the arc discharge hole 130 is a passage through which the gas generated together with the arc is discharged.

The arc discharge hole 130 is formed through the outer surface of the frame 100 to communicate with the inner space and the outside of the frame 100 .

Specifically, the arc discharge hole 130 communicates with the inner space of the upper frame 110 and the inner space of the lower frame 120 and the outside. The gas generated in the inner case 210 and introduced into the inner space of the frame 100 may be discharged to the outside through the arc discharge hole 130 .

The arc discharge hole 130 communicates with the inner case 210 . After the arc generated in the inner case 210 is extinguished, it may be discharged to the outside through the arc discharge hole 130 .

As shown in FIG. 7 , a plurality of arc discharge holes 130 positioned on the front side are formed to communicate with the inner space of each inner case 210 . Although not shown, it will be understood that a plurality of arc discharge holes 130 located on the rear side are also formed, and communicate with the inner space of each inner case 210 .

A plurality of arc discharge holes 130 may be formed. The plurality of arc discharge holes 130 may be located adjacent to the arc extinguishing unit 500 .

As shown in FIG. 8 , the arc discharge hole 130 located on the front side is located on the lower side corresponding to the position of the arc extinguishing unit 500 . In addition, the arc discharge hole 130 located on the rear side is located on the upper side corresponding to the position of the arc extinguishing unit (500).

(2) Description of the mechanism 200 and the trip unit 300

The mechanism 200 and the trip unit 300 are operated as an abnormal current is passed, and cut off the current between the circuit breaker 10 for wiring and an external power source or load.

The mechanism 200 is connected to the trip unit 300 . When the trip unit 300 is actuated (ie, rotated), the mechanism 200 may also be rotated.

The mechanism 200 is connected to the energizing unit 400 . When the mechanism 200 is actuated (ie, rotated), the movable contact 422 may be spaced apart from the fixed contact 412 . Accordingly, the circuit breaker 10 for wiring is electrically separated from an external power source or load.

The mechanism 200 includes an inner case 210 .

The inner case 210 accommodates the energizing part 400 connected to the outside to be energized. The conducting unit 400 accommodated in the inner case 210 is connected to the mechanism 200 . When the mechanism 200 is operated, the conduction unit 400 is also operated to cut off electricity between the circuit breaker 10 for wiring and an external power source or load.

A space is formed inside the inner case 210 . The energizing part 400 is accommodated in the space. In addition, the arc extinguishing unit 500 for extinguishing the generated arc is accommodated in the space.

A plurality of inner cases 210 may be provided. The plurality of inner cases 210 may be spaced apart from each other and arranged side by side in one direction. In the illustrated embodiment, three inner cases 210 are provided, and are disposed to be spaced apart from each other in the left and right directions. A blocking member 600 is positioned between the plurality of inner cases 210 .

This is due to the R-phase, S-phase, T-phase or U-phase, V-phase, and W-phase three-phase current passing through the circuit breaker 10 according to an embodiment of the present invention. The number of the inner case 210 may be changed according to the type of the phase of the current passed through the circuit breaker 10 for wiring.

When the mechanism 200 and the trip unit 300 are operated, the energizing unit 400 accommodated in the inner space of the inner case 210 is rotated to generate an arc and gas. The generated arc passes through the arc extinguishing unit 500 and is discharged to the outside through the arc discharge hole 130 after being extinguished.

In this case, a portion of the generated gas may be introduced into the inner space of the frame 100 . The introduced gas is discharged to the outside of the frame 100 through the arc discharge hole 130 .

At this time, the blocking member 600 positioned between the plurality of inner cases 210 is positioned. The blocking member 600 may prevent the gas introduced into the inner space of the frame 100 from remaining. A detailed description thereof will be provided later.

A gas hole 211 is formed in the inner case 210 . The gas hole 211 is formed through a surface of the plurality of inner cases 210 facing each other, and one surface facing the blocking member 600 in the illustrated embodiment.

The gas hole 211 communicates with the inner space of the inner case 210 and the inner space of the frame 100 . Gas generated in the inner space of the inner case 210 may flow into the inner space of the frame 100 through the gas hole 211 .

The gas hole 211 communicates with the main space 625 of the blocking member 600 . Gas generated in the inner space of the inner case 210 may flow into the main space 625 through the gas hole 211 .

The gas introduced into the main space 625 may be discharged to the outside of the frame 100 through the arc discharge hole 130 . A detailed description thereof will be provided later.

The trip unit 300 is rotated as an abnormal current is applied to operate the mechanism 200 . The trip unit 300 is electrically connected to the energizing unit 400 .

The trip unit 300 includes a shooter (not shown) and a crossbar (not shown). When an abnormal current is applied, the bimetal or the like is bent by the generated heat and strikes the crossbar (not shown).

Accordingly, the crossbar (not shown) is rotated to hit the shooter (not shown). Accordingly, the mechanism 200 connected to the trip unit 300 and the conduction unit 400 connected to the mechanism 200 are rotated to cut off electricity between the circuit breaker 10 for wiring and an external power source or load.

Since the operation process of the mechanism 200 and the trip unit 300 is a well-known technique, a detailed description thereof will be omitted.

(3) Description of the energizing unit 400

The energization unit 400 permits or blocks electricity between the circuit breaker 10 and an external power source or load. The energization is achieved by contacting the fixed terminal portion 410 and the movable terminal portion 420 . In addition, the blocking is achieved by separating the fixed terminal part 410 and the movable terminal part 420 from each other.

The conducting unit 400 is accommodated in the inner space of the inner case 210 . The conducting unit 400 is located adjacent to the arc extinguishing unit 500 in the inner space of the inner case 210 . The arc generated by the operation of the energizing unit 400 may be extinguished while passing through the arc extinguishing unit 500 .

The energizing unit 400 is connected to the outside to be energized. Specifically, the conducting unit 400 is electrically connected to an external power source or load by the fixed terminal unit 410 exposed to the outside.

As described above, the trip unit 300 is coupled to the front side of the frame 100 . The fixed terminal unit 410 positioned on the front side may be electrically connected to the trip unit 300 .

A plurality of conducting units 400 may be provided. The plurality of conductive parts 400 may be accommodated in the plurality of inner cases 210 , respectively. In the illustrated embodiment, three conductive parts 400 are provided, and are accommodated in three inner cases 210 , respectively.

In the illustrated embodiment, the conducting unit 400 includes a fixed terminal unit 410 , a movable terminal unit 420 , and a rotating shaft 430 .

The fixed terminal portion 410 and the movable terminal portion 420 are in contact with or spaced apart from each other, allowing or blocking the conduction of the circuit breaker 10 for wiring. The contact or separation may be achieved by rotating the rotating shaft 430 .

The fixed terminal unit 410 is electrically connected to an external power source or load. By means of the fixed terminal unit 410 , the circuit breaker 10 for wiring may be connected to an external power source or load to be energized.

A portion of the fixed terminal unit 410 is accommodated in the inner space of the inner case 210 . As can be seen from the name, the fixed terminal unit 410 does not move in the inner space of the inner case 210 .

Accordingly, the separation between the fixed terminal part 410 and the movable terminal part 420 is achieved by the movement of the movable terminal part 420 .

The remaining part of the fixed terminal part 410 is exposed to the outside of the inner case 210 . The remaining part of the fixed terminal part 410 may be electrically connected to an external power source or load by a conducting wire member (not shown).

A plurality of fixed terminal units 410 may be provided. The plurality of fixed terminal units 410 are respectively located on the front side and the rear side of the inner case 210 . In the illustrated embodiment, two fixed terminal units 410 are provided and are arranged to be point-symmetrical with respect to the central axis of the rotation shaft 430 .

The plurality of fixed terminal units 410 may be electrically connected to each other. The connection is formed by contacting each of the plurality of movable terminal portions 420 with the plurality of fixed terminal portions 410 .

The fixed terminal unit 410 is positioned adjacent to the arc extinguishing unit 500 . Specifically, the fixed terminal unit 410 located on the front side is located above the arc extinguishing unit 500 . In addition, the fixed terminal unit 410 located on the rear side is located below the arc extinguishing unit 500 .

The fixed terminal unit 410 may be formed of a conductive material. In an embodiment, the fixed terminal part 410 may be formed of copper (Cu), iron (Fe), or the like.

The fixed terminal unit 410 includes a fixed contact bar 411 and a fixed contact 412 .

The fixed contact point 411 is electrically connected to an external power source or load. A portion of the fixed contact point 411 is accommodated in the inner space of the inner case 210 , and the other portion is exposed to the outside of the inner case 210 . The remaining part may be exposed to the outside of the frame 100 or may be electrically connected to the trip unit 300 .

In the illustrated embodiment, the fixed contact point 411 is provided on the front side and the rear side of the inner case 210 , respectively. The fixed contact point 411 located on the front side is exposed to the front side of the inner case 210 , and the fixed contact point 411 located on the rear side is extended and exposed to the rear side of the inner case 210 .

The fixed contact bar 411 is electrically connected to the fixed contact 412 .

The fixed contact 412 is in contact with or spaced apart from the movable contact 422 . Accordingly, the circuit breaker 10 for wiring may be energized or cut off from an external power source or load.

The fixed contact 412 is electrically connected to the fixed contact 411 . The fixed contact 412 may be in contact with the fixed contact 411 . In an embodiment, the fixed contact 412 may be integrally formed with the fixed contact 411 .

The fixed contact 412 located on the front side is located below the fixed contact stand 411 . The fixed contact 412 located on the rear side is located on the upper side of the fixed contact stand 411 .

That is, the fixed contact 412 is positioned in a direction toward the arc extinguishing unit 500 , and is disposed to partially overlap the arc extinguishing unit 500 in the front-rear direction.

Accordingly, the arc generated by the fixed contact 412 being separated from the movable contact 422 may be rapidly moved toward the arc extinguishing unit 500 .

The movable terminal part 420 is electrically connected to or separated from the fixed terminal part 410 . By the movable terminal part 420 , the plurality of fixed terminal parts 410 may be electrically connected to each other. As a result, the circuit breaker 10 for wiring may be electrically connected to an external power source or load.

The movable terminal part 420 is accommodated in the inner space of the inner case 210 . As can be seen from the name, the movable terminal unit 420 is movably coupled to the inner space of the inner case 210 .

The movable terminal part 420 is coupled to the rotation shaft 430 . When the rotation shaft 430 is rotated, the movable terminal part 420 may also rotate together with the rotation shaft 430 .

The movable terminal part 420 is electrically connected to the rotation shaft 430 . The current flowing through the fixed terminal unit 410 may be transmitted to the movable terminal unit 420 and the rotating shaft 430 .

A plurality of movable terminal units 420 may be provided. The plurality of movable terminal parts 420 are respectively located on the front side and the rear side of the inner case 210 . In the illustrated embodiment, two movable terminal units 420 are provided and are arranged to be point-symmetrical with respect to the central axis of the rotation shaft 430 .

The plurality of movable terminal portions 420 may be in contact with or spaced apart from the plurality of fixed terminal portions 410 to be energized, respectively. That is, the movable terminal unit 420 may be rotated to contact the fixed terminal unit 410 , or rotated to be spaced apart from the fixed terminal unit 410 .

The contact and separation may be achieved according to the rotation of the rotation shaft 430 to which the movable terminal part 420 is connected.

The movable terminal unit 420 is positioned adjacent to the arc extinguishing unit 500 .

In the embodiment shown in FIG. 8 , the movable terminal part 420 positioned on the front side is positioned adjacent to the arc extinguishing part 500 under the fixed terminal part 410 .

The movable terminal part 420 may be spaced apart from the fixed terminal part 410 as the rotating shaft 430 rotates counterclockwise. In addition, the movable terminal part 420 may be in contact with the fixed terminal part 410 as the rotating shaft 430 rotates in a clockwise direction.

In the embodiment shown in FIG. 8 , the movable terminal part 420 positioned on the rear side is positioned adjacent to the arc extinguishing part 500 on the upper side of the fixed terminal part 410 .

The movable terminal part 420 may be spaced apart from the fixed terminal part 410 as the rotating shaft 430 rotates counterclockwise. In addition, the movable terminal part 420 may be in contact with the fixed terminal part 410 as the rotating shaft 430 rotates in a clockwise direction.

That is, as the rotation shaft 430 rotates, the plurality of fixed terminal parts 410 and the movable terminal part 420 may be in contact with each other or may be spaced apart from each other.

The movable terminal unit 420 may be formed of a conductive material. In an embodiment, the movable terminal part 420 may be formed of copper (Cu), iron (Fe), or the like.

The movable terminal unit 420 includes a movable contact stand 421 and a movable contact 422 .

The movable contact point 421 is electrically connected to the rotation shaft 430 . When the rotation shaft 430 is rotated, the movable contact point 421 may also be rotated. Accordingly, the movable contact bar 421 may be rotationally moved in a direction toward the fixed terminal unit 410 or in a direction away from the fixed terminal unit 410 .

In the illustrated embodiment, a plurality of movable contact points 421 are provided and are respectively connected to the front side and the rear side of the rotation shaft 430 . The movable contact bar 421 positioned on the front side is in contact with or spaced apart from the fixed terminal part 410 positioned on the front side to be energized. The movable contact bar 421 located on the rear side is in contact with or spaced apart from the fixed terminal part 410 located on the rear side to be energized.

The movable contact point 421 is possibly connected to the movable contact 422 .

The movable contact 422 is in contact with or spaced apart from the fixed contact 412 . Accordingly, the circuit breaker 10 for wiring may be energized or cut off from an external power source or load.

The movable contact 422 is electrically connected to the movable contact stand 421 . The movable contact 422 may be in contact with the movable contact 421 . In one embodiment, the movable contact 422 may be integrally formed with the movable contact stand 421 .

The movable contact 422 located on the front side is located on the upper side of the movable contact stand 421 . The movable contact 422 located on the rear side is located below the movable contact stand 421 .

That is, the movable contact 422 is disposed to partially overlap with the arc extinguishing unit 500 in the front-rear direction in the direction toward the fixed contact 412 .

Accordingly, the arc generated by the fixed contact 412 being separated from the movable contact 422 may be extended along the movable contact 422 and rapidly moved toward the arc extinguishing unit 500 .

The rotation shaft 430 is connected to the movable terminal part 420 and rotates together with the movable terminal part 420 . By rotation of the rotating shaft 430 , the movable terminal unit 420 may be in contact with or spaced apart from the fixed terminal unit 410 to be energized.

The rotating shaft 430 is rotatably coupled to the inner case 210 . The rotating shaft 430 is rotatably accommodated in the inner space of the inner case 210 .

The rotation shaft 430 may be formed of a conductive material. In an embodiment, the rotation shaft 430 may be formed of copper (Cu), iron (Fe), or the like.

The rotation shaft 430 is connected to the movable terminal part 420 . In the illustrated embodiment, the front side of the rotation shaft 430 is connected to the movable terminal part 420 located on the front side, and the rear side of the rotation shaft 430 is connected to the movable terminal part 420 located on the rear side.

The rotating shaft 430 is electrically connected to the movable terminal part 420 . The current flowing into the circuit breaker 10 through the fixed terminal unit 410 may proceed toward the other fixed terminal unit 410 through the movable terminal unit 420 and the rotating shaft 430 .

When an abnormal current is passed through the circuit breaker 10 for wiring, the rotating shaft 430 is rotated so that the movable terminal part 420 and the fixed terminal part 410 are spaced apart. In the illustrated embodiment, the rotating shaft 430 may be rotated counterclockwise to cut off electricity between the circuit breaker 10 for wiring and an external power source or load.

(4) Description of arc extinguishing unit 500

In the arc extinguishing unit 500, an abnormal current is energized to induce an arc generated by separating the fixed terminal unit 410 and the movable terminal unit 420 from each other. The generated arc passes through the arc extinguishing unit 500 and is extinguished, and then may be discharged to the outside of the circuit breaker 10 for wiring through the arc discharge hole 130 .

The arc extinguishing unit 500 is accommodated in the inner space of the inner case 210 .

The arc extinguishing unit 500 is positioned adjacent to the fixed terminal unit 410 and the movable terminal unit 420 . Specifically, the arc extinguishing unit 500 may be disposed to overlap the fixed contact 412 and the movable contact 422 in the left and right directions.

A plurality of arc extinguishing units 500 may be provided. The plurality of arc extinguishing units 500 may be positioned adjacent to the plurality of fixed terminal units 410 and the plurality of movable terminal units 420 , respectively.

In the illustrated embodiment, two arc extinguishing units 500 are provided, respectively, and positioned adjacent to the terminal parts 410 and 420 positioned on the front side and the terminal parts 410 and 420 positioned on the rear side, respectively.

In the illustrated embodiment, the arc extinguishing unit 500 includes a support plate 510 and a grid 520 .

The support plate 510 is coupled to the plurality of grids 520 . The support plate 510 may be coupled to both sides of the plurality of grids 520 , respectively, on the left and right sides in the illustrated embodiment.

A plurality of support plates 510 may be provided. The plurality of support plates 510 are spaced apart from each other and disposed to face each other. In the illustrated embodiment, two support plates 510 are provided, respectively, respectively located on the left and right sides of the grid 520 . Each grid 520 may be inserted and coupled to each support plate 510 .

The support plate 510 may be formed of an insulating material. This is to prevent the magnetic force of the grid 520 for inducing the generated arc from being disturbed.

The support plate 510 may be formed of a heat-resistant and pressure-resistant material. Accordingly, damage or deterioration of the support plate 510 due to the generated arc may be prevented.

In an embodiment, the support plate 510 may be formed of reinforced plastic or the like.

The grid 520 guides the generated arc to the arc extinguishing unit 500 . A plurality of grids 520 may be provided. A plurality of grids may be stacked spaced apart from each other.

The grid 520 may be magnetic or may be formed of a material that can be magnetized. In an embodiment, each grid may be formed of a permanent magnet or iron (Fe).

The grid 520 is insertedly coupled to the support plate 510 . Specifically, the plurality of grids 520 are respectively inserted into the support plate 510 . In this case, each grid 520 may be inserted into the support plate 510 so as to be spaced apart from each other and stacked.

One side of the grid 520 facing each fixed contact 412 may be recessed. Accordingly, an opening opened toward the rotation shaft 430 is formed in the grid 520 .

The movable contact 422 may move through the opening. Accordingly, the arc generated by the fixed contact 412 and the movable contact 422 being spaced apart extends along the movable contact 422 and may be guided to the grid 520 by the magnetic force applied by the grid 520 . .

3. Description of the blocking member 600 according to an embodiment of the present invention

9 to 13 , the circuit breaker 10 for wiring according to an embodiment of the present invention includes a blocking member 600 .

The blocking member 600 blocks the gas generated in the inner space of the inner case 210 from being diffused into the inner space of the frame 100 . Accordingly, the introduced gas may be discharged to the outside of the circuit breaker 10 without remaining in the internal space of the frame 100 .

The blocking member 600 is accommodated in the inner space of the lower frame 120 . The blocking member 600 is positioned between the inner cases 210 positioned adjacent to each other.

The blocking member 600 is positioned adjacent to the gas hole 211 formed through the inner case 210 . The main space 625 of the blocking member 600 communicates with the gas hole 211 . Gas generated in the inner space of the inner case 210 may flow into the main space 652 .

A plurality of blocking members 600 may be provided. The plurality of blocking members 600 may be positioned in a space between the inner cases 210 adjacent to each other. In the illustrated embodiment, two blocking members 600 are provided, including a first blocking member 600a and a second blocking member 600b.

The first blocking member 600a is positioned in the space between the two inner cases 210 positioned on the left and the center. In addition, the second blocking member 600b is located in the space between the two inner cases 210 located at the center and the right side.

The number and arrangement of the blocking members 600 may be changed according to the number and arrangement of the inner case 210 .

The blocking member 600 may be respectively coupled to the inner case 210 adjacent to each other. The coupling may be formed by coupling the support member (not shown) to the coupling hole 611 formed through the inner case 210 and the coupling part 610 adjacent to each other.

The blocking member 600 may be formed of an insulating material. This is to prevent the magnetic force of the grid 520 for inducing the generated arc from being disturbed.

The blocking member 600 may be formed of a heat-resistant and pressure-resistant material. Accordingly, damage or deterioration of the blocking member 600 by the generated gas may be prevented.

In an embodiment, the blocking member 600 may be formed of reinforced plastic or ceramic.

In the illustrated embodiment, the blocking member 600 includes a coupling portion 610 , a main extension portion 620 , and a sub extension portion 630 .

The coupling part 610 is a portion where the blocking member 600 is coupled to the inner case 210 . In addition, the coupling part 610 is connected to the main extension part 620 and the sub extension part 630 , respectively.

In the illustrated embodiment, the coupling portion 610 has a circular cross section and has a cylindrical shape extending in the left and right direction. The shape of the coupling part 610 may be changed according to the shape of the space formed between the inner cases 210 adjacent to each other.

A coupling hole 611 is formed through the inside of the coupling part 610 .

The coupling hole 611 is a space in which a support member (not shown) for coupling the blocking member 600 to the inner case 210 adjacent to each other is coupled.

In the illustrated embodiment, the coupling hole 611 is formed as a cylindrical through-hole having a circular cross-section and extending in the left-right direction. The shape of the coupling hole 611 may be changed according to the shape of the support member (not shown).

One side of the coupling part 610 opposite to the lower base 121 and the other side of the coupling part 610 facing the lower base 121, that is, the main extension part 620 is continuous on the upper side and the lower side in the illustrated embodiment. .

The main extension 620 communicates with the gas hole 211 to primarily block the residual gas introduced into the inner space of the frame 100 .

In addition, the main extension 620 partially seals the first space S1 formed between the inner cases 210 adjacent to each other. Accordingly, the introduced gas may not diffuse and remain in the internal space of the frame 100 .

The shape of the main extension 620 may be determined according to the shape of the space formed between the inner cases 210 adjacent to each other. Therefore, in order to provide the blocking member 600 according to the embodiment of the present invention, it is unnecessary to excessively change the structure of the circuit breaker 10 for wiring.

In the illustrated embodiment, the main extension 620 includes a first main arm 621 , a second main arm 622 , a third main arm 623 , a fourth main arm 624 , and a main space. part 625 .

The first main arm 621 is continuous with the coupling part 610 . The first main arm 621 is formed to extend in a direction opposite to the coupling part 610 (ie, upward) from one side of the coupling part 610 opposite to the lower base 121 and from the upper side in the illustrated embodiment.

In an embodiment, the first main arm 621 may extend vertically upward with respect to the lower base 121 .

The first main arm 621 supports the blocking member 600 from the upper side. In other words, the first main arm 621 is an upper portion of the blocking member 600 supported by the inner case 210 adjacent to each other.

Accordingly, the upper side of the blocking member 600 may be stably maintained in the space between the inner case 210 adjacent to each other. As a result, rotation or shaking of the blocking member 600 can be prevented.

The second main arm 622 is located on the opposite side of the first main arm 621 to the coupling part 610, and on the lower side in the illustrated embodiment. The second main arm 622 surrounds the main space 625 from the front side.

The second main arm 622 is continuous with the coupling part 610 . The second main arm 622 is formed to extend in a direction opposite to the coupling part 610 (ie, the lower side) from the other side of the coupling part 610 facing the lower base 121, from the lower side in the illustrated embodiment.

In an embodiment, the second main arm 622 may extend downwardly perpendicular to the lower base 121 . That is, in the above embodiment, the first main arm 621 and the second main arm 622 may be parallel to each other. In other words, the first main arm 621 and the second main arm 622 may be positioned on one virtual straight line.

The second main arm 622 supports the blocking member 600 from the front side. In other words, the second main arm 622 is a front side portion of the blocking member 600 supported by the inner case 210 adjacent to each other.

Accordingly, the front side of the blocking member 600 may be stably maintained in the space between the inner case 210 adjacent to each other. As a result, rotation or shaking of the blocking member 600 can be prevented.

A third main arm 623 extends from one side of the second main arm 622 opposite to the coupling part 610 , and a lower end in the illustrated embodiment. The third main arm 623 surrounds the main space 625 from the lower side.

The third main arm 623 is continuous with the second main arm 622 . The third main arm 623 is opposite to the second main arm 622 or the trip unit 300 from one side of the second main arm 622 opposite to the trip unit 300 and from the rear side in the illustrated embodiment. It is formed extending in the direction (ie, the rear side).

The third main arm 623 extends to form a predetermined angle with the second main arm 622 . In an embodiment, the third main arm 623 may extend at a right angle or an acute angle with respect to the second main arm 622 , that is, an angle of 90° or less.

The third main arm 623 supports the blocking member 600 from the lower side. In other words, the third main arm 623 is a lower portion of the blocking member 600 supported by the inner case 210 adjacent to each other.

Accordingly, the lower side of the blocking member 600 may be stably maintained in the space between the inner cases 210 adjacent to each other. As a result, rotation or shaking of the blocking member 600 can be prevented.

Also, the third main arm 623 may primarily fill a space formed between the inner cases 210 adjacent to each other. That is, the first space S1 positioned above (ie, adjacent to the gas hole 211 ) among the spaces S1 and S2 in which the generated gas can remain is removed by the third main arm 623 . .

A fourth main arm 624 extends from one side of the third main arm 623 opposite to the second main arm 622 , in the illustrated embodiment, from the rear end. The fourth main arm 624 surrounds the main space 625 from the rear side.

The fourth main arm 624 is continuous with the third main arm 623 . The fourth main arm 624 is one side of the third main arm 623 opposite to the second main arm 622, in the illustrated embodiment, the opposite direction to the lower base 121 from the rear side (ie, the upper side). is formed by extending

The fourth main arm 624 extends to form a predetermined angle with the third main arm 623 . In an embodiment, the fourth main arm 624 may extend at a right angle or an acute angle with respect to the third main arm 623 , that is, an angle of 90° or less.

In an embodiment where the angle between the second main arm 622 and the third main arm 623 and the angle between the third main arm 623 and the fourth main arm 624 is 90°, the second main arm ( It will be appreciated that 622 and fourth main arm 624 may extend parallel to each other.

The fourth main arm 624 supports the blocking member 600 from the rear side. In other words, the fourth main arm 624 is a rear side portion of the blocking member 600 supported by the inner case 210 adjacent to each other.

Accordingly, the rear side of the blocking member 600 may be stably maintained in the space between the inner case 210 adjacent to each other. As a result, rotation or shaking of the blocking member 600 can be prevented.

A space surrounded by the second to fourth main arms 622 , 623 , and 624 may be defined as a main space portion 625 .

The main space 625 communicates with the gas hole 211 formed through the inner case 210 . Gas generated in the inner space of the inner case 210 may be introduced into the main space 625 through the gas hole 211 .

The main space 625 communicates with the arc discharge hole 130 . The gas introduced into the main space 625 may flow toward the arc discharge hole 130 along a space generated by a gap between the inner cases 210 adjacent to each other.

In this case, the first space S1 positioned at the upper side among the spaces S1 and S2 formed between the adjacent inner cases 210 is primarily filled by the third main arm 623 . Accordingly, the gas introduced into the main space 625 may not remain in the first space S1 and may flow toward the arc discharge hole 130 .

The sub extension 630 is positioned adjacent to the second main arm 622 and the third main arm 623 . The sub extension portion 630 is continuous from the other side of the coupling portion 610 facing the trip portion 300 , that is, the rear side in the illustrated embodiment.

The sub-extension part 630 secondarily blocks the gas introduced into the main space 625 from remaining in the internal space of the frame 100 .

In addition, the sub extension 630 partially seals the second space S2 formed between the inner cases 210 adjacent to each other. Accordingly, the introduced gas may not diffuse and remain in the internal space of the frame 100 .

The shape of the sub-extension part 630 may be determined according to the shape of the space formed between the inner cases 210 adjacent to each other. Therefore, in order to provide the blocking member 600 according to the embodiment of the present invention, it is unnecessary to excessively change the structure of the circuit breaker 10 for wiring.

In the illustrated embodiment, the sub extension 630 includes a first sub arm 631 , a second sub arm 632 , a third sub arm 633 , a first sub space 634 , and a second sub space. part 635 .

The first sub-arm 631 is continuous with the coupling part 610 . The first sub-arm 631 extends in a direction opposite to the coupling part 610 (ie, the lower side of the front) from the other side of the coupling part 610 facing the trip part 300, from the front side in the illustrated embodiment. is formed

The first sub-arm 631 may extend in an inclined front side with respect to the lower base 121 . In the illustrated embodiment, the first sub-arm 631 is extended such that the included angle between the imaginary straight line extending the first sub-arm 631 and the lower base 121 forms an acute angle.

The first sub arm 631 surrounds the coupling part 610 , the main space part 625 , the second main arm 622 , and the first sub space part 634 from the front side.

The first sub-arm 631 supports the blocking member 600 from the front side. In other words, the first sub-arm 631 is a front side portion of the blocking member 600 supported by the inner case 210 adjacent to each other.

Accordingly, the front side of the blocking member 600 may be stably maintained in the space between the inner case 210 adjacent to each other. As a result, rotation or shaking of the blocking member 600 can be prevented.

A second sub-arm 632 extends from one side of the first sub-arm 631 opposite to the coupling part 610 , and from a lower end of the front in the illustrated embodiment. The second sub-arm 632 surrounds the main space 625 , the second main arm 622 , and the first sub-space 634 from the front side.

The second sub-arm 632 is continuous with the first sub-arm 631 . The second sub-arm 632 is opposite to the first sub-arm 631 or the coupling part 610 at one side of the first sub-arm 631 opposite to the coupling part 610, and at the lower side of the front in the illustrated embodiment. It is formed to extend in a direction (ie, downward).

The second sub-arm 632 extends to form a predetermined angle with the first sub-arm 631 . In an embodiment, the second sub-arm 632 may extend at an obtuse angle with the first sub-arm 631 .

The second sub-arm 632 extends to be spaced apart from the front side with respect to the second main arm 622 . In an embodiment, the second sub-arm 632 may extend parallel to the second main arm 622 . A space in which the second sub-arm 632 and the second main arm 622 are spaced apart may be defined as a first sub-space 634 .

The second sub-arm 632 supports the blocking member 600 from the front side. In other words, the second sub-arm 632 is a rear side portion of the blocking member 600 supported by the inner case 210 adjacent to each other.

Accordingly, the front side of the blocking member 600 may be stably maintained in the space between the inner case 210 adjacent to each other. As a result, rotation or shaking of the blocking member 600 can be prevented.

A third sub-arm 633 extends from one side of the second sub-arm 632 opposite to the coupling part 610 and a lower end in the illustrated embodiment. The third sub-arm 633 surrounds the main space 625 , the third main arm 623 , and the second sub-space 635 from the lower side.

The third sub-arm 633 is continuous with the second sub-arm 632 . The third sub-arm 633 is opposite to the second sub-arm 632 or the trip unit 300 from one side of the second sub-arm 632 opposite to the coupling unit 610 and from the lower side in the illustrated embodiment. (ie, the rear side) is formed to extend.

The third sub-arm 633 extends to form a predetermined angle with the second sub-arm 632 . In an embodiment, the third sub-arm 633 may extend at a right angle or an acute angle to the second sub-arm 632 , that is, an angle of 90° or less.

The third sub-arm 633 extends downwardly spaced apart from the third main arm 623 . In an embodiment, the third sub-arm 633 may extend parallel to the third main arm 623 . A space in which the third sub-arm 633 and the third main arm 623 are spaced apart may be defined as the second sub-space 635 .

The third sub-arm 633 supports the blocking member 600 from the lower side. In other words, the third sub-arm 633 is a lower portion of the blocking member 600 supported by the inner case 210 adjacent to each other.

Accordingly, the lower side of the blocking member 600 may be stably maintained in the space between the inner cases 210 adjacent to each other. As a result, rotation or shaking of the blocking member 600 can be prevented.

In addition, the third sub-arm 633 may secondary fill the space formed between the inner case 210 adjacent to each other. That is, the second space S2 located at the lower side (ie, far from the gas hole 211 ) among the spaces S1 and S2 in which the generated gas can remain is removed by the third sub-arm 633 . .

A space surrounded by the first sub-arm 631 , the second sub-arm 632 , and the second main arm 622 may be defined as a first sub-space part 634 .

The first sub-space portion 634 is a space into which a portion of the lower frame 120 positioned in the space formed between the inner cases 210 adjacent to each other is inserted. That is, the part of the lower frame 120 is accommodated in the first sub-space 634 .

Accordingly, the blocking member 600 may be stably maintained in the space formed between the inner cases 210 adjacent to each other.

The first sub-space portion 634 is formed to extend between the coupling portion 610 and the third sub-arm 633 . That is, the first sub-space portion 634 extends in a direction opposite to the third sub-arm 633 , in the illustrated embodiment, in the vertical direction.

A lower side of the first sub-space 634 communicates with the second sub-space 635 .

A space surrounded by the third sub-arm 633 and the third main arm 623 may be defined as the second sub-space 635 .

The second sub space 635 is a lower frame 120 positioned between the first space S1 and the second space S2 in which the third main arm 623 and the third sub arm 633 are accommodated, respectively. It is a space where other parts of That is, the other portion of the lower frame 120 is accommodated in the second sub space 635 .

Accordingly, the blocking member 600 may be stably maintained in the space formed between the inner cases 210 adjacent to each other.

The second sub space 635 is formed to extend in a direction away from the second sub arm 632 . That is, in the illustrated embodiment, the second sub-space portion 635 extends in the front-rear direction.

The front side of the second sub-volume 635 communicates with the first sub-volume 634 . In addition, the rear side of the second sub space 635 communicates with the inner space of the frame 100 .

Accordingly, the one part and the other part of the lower frame 120 are connected to the first sub-space part 634 and the second sub-space part 635 through the opening formed on the rear side of the second sub-space part 635 . each can be accommodated.

4. Description of the process of preventing the residual gas generated in the blocking member 600 and the circuit breaker 10 for wiring including the same according to an embodiment of the present invention

The circuit breaker 10 for wiring according to an embodiment of the present invention includes a blocking member 600 . The blocking member 600 may prevent the gas generated in the inner space of the inner case 210 from diffusing or remaining in the inner space of the frame 100 .

Hereinafter, a process for preventing diffusion and residual gas generated in the blocking member 600 and the circuit breaker 10 for wiring including the same according to an embodiment of the present invention will be described in detail with reference to FIG. 14 .

In the illustrated embodiment, it is assumed that the fixed contact 412 and the movable contact 422 are spaced apart to generate arc and gas. Also, the movement path of the generated gas will be understood with reference to the arrows shown in the enlarged view.

The arc generated inside the inner case 210 passes through the arc extinguishing unit 500 and is discharged through the arc discharge hole 130 after being extinguished.

At this time, a portion of the gas generated along with the arc flows into the main space 625 through the gas hole 211 .

The gas flowing into the main space 625 flows toward the arc discharge hole 130 through the space formed between the inner cases 210 positioned adjacent to each other. That is, in the illustrated embodiment, the gas flows downward in a direction toward the lower base 121 .

The gas passed from the main space 625 reaches the first space S1 located far from the lower base 121 .

At this time, the third main arm 623 of the blocking member 600 is inserted into the first space S1. Accordingly, a sufficient space for the introduced gas to remain in the first space S1 is not secured.

Accordingly, the gas does not remain in the first space S1 and flows toward the second space S2 positioned below the first space S1.

Meanwhile, the third sub-arm 633 of the blocking member 600 is inserted into the second space S2 . Accordingly, a sufficient space for the gas introduced into the second space S2 to remain is not secured.

Therefore, the gas does not remain in the second space S2, but flows toward the arc discharge hole 130 and is discharged to the outside of the circuit breaker 10 for wiring.

Accordingly, the generated gas may be discharged to the outside of the circuit breaker 10 without diffusing or remaining in the inner space of the frame 100 . Accordingly, an increase in contamination, a decrease in insulation resistance, and an increase in leakage current that may be generated as the generated gas remains in the circuit breaker 10 for wiring may be prevented.

Although the above has been described with reference to the preferred embodiment of the present invention, those of ordinary skill in the art can variously modify and change the present invention within the scope without departing from the spirit and scope of the present invention described in the claims below. You will understand that you can.

10: circuit breaker for wiring
100: frame
110: upper frame
120: lower frame
121: lower base
130: arc outlet hole
200: mechanism
210: inner case
211: gas hole
300: trip unit
400: current unit
410: fixed terminal unit
411: fixed contact bar
412: fixed contact
420: movable terminal unit
421: movable contact point
422: movable contact
430: rotating shaft
500: arc sohobu
510: support plate
520: grid
600: blocking member
600a: first blocking member
600b: second blocking member
610: coupling part
611: coupling hole
620: main extension
621: first main arm
622: second main arm
623: third main arm
624: fourth main arm
625: main space
630: sub extension
631: first sub arm
632: second sub arm
633: third sub arm
634: first sub space unit
635: second sub space
1000: circuit breaker for wiring according to the prior art
1100: housing
1110: outer case
1120: inner case
1200: mechanism
1300: trip unit
1310: pressure trip part
1320: arc sohobu
1330: dwelling space
1400: blocking member
1410: first extension
1420: second extension
1430: third extension
S1: first space
S2: second space

Claims (15)

coupling part;
a main extension part continuous with the coupling part and extending in a direction opposite to the coupling part; and
It is continuous with the coupling part, is spaced apart from the main extension part, and includes a sub-extension part continuous in a direction opposite to the coupling part,
The main extension part,
It includes a main space part that is a space positioned between arc extinguishing parts positioned adjacent to each other,
The sub extension part,
extending around the main space,
absence of blocking. According to claim 1,
The main extension part,
a first main arm that is continuous with the coupling part and extends in a direction opposite to the coupling part;
a second main arm that is continuous with the coupling part and extends in another direction opposite to the direction in which the first main arm extends;
a third main arm continuous with the second main arm and extending at a predetermined angle with the second main arm; and
and a fourth main arm that is continuous with the third main arm, forms a predetermined angle with the third main arm, and extends in the one direction in which the first main arm extends,
absence of blocking. 3. The method of claim 2,
The main space part,
Surrounded by the second main arm, the third main arm and the fourth main arm,
absence of blocking. 3. The method of claim 2,
The predetermined angle between the second main arm and the third main arm is less than or equal to 90˚,
The predetermined angle between the third main arm and the fourth main arm is less than or equal to 90˚,
absence of blocking. 3. The method of claim 2,
The sub extension part,
a first sub-arm that is continuous with the coupling part and extends in a direction opposite to the coupling part;
a second sub-arm that is continuous with the first sub-arm, forms a predetermined angle with the first sub-arm, and extends in a direction opposite to the coupling part; and
a third sub-arm that is continuous with the second sub-arm, forms a predetermined angle with the second sub-arm, and extends in a direction in which the third main arm extends;
absence of blocking. 6. The method of claim 5,
the first sub-arm and the second sub-arm,
spaced apart from the second main arm in a direction opposite to the main space,
A first sub-space portion is formed between the first sub-arm and the second sub-arm and the second main arm and is a space surrounded by the first sub-arm, the second sub-arm, and the second main arm;
absence of blocking. 6. The method of claim 5,
The third sub-arm,
spaced apart from the third main arm in a direction opposite to the main space,
A second sub-space is formed between the third sub-arm and the third main arm, and is a space surrounded by the third sub-arm and the third main arm.
absence of blocking. According to claim 1,
Inside the coupling part, a coupling hole is formed through,
absence of blocking. a frame with a space formed therein;
a plurality of inner cases accommodated in the space of the frame and having arc discharge holes through which the generated arc is discharged; and
Between the plurality of the inner case, it is located adjacent to the arc discharge hole, comprising a blocking member for blocking the generated gas,
Inside the inner case,
a fixed contact operably connected to the outside;
a movable contact positioned adjacent to the fixed contact and movably provided in a direction toward the fixed contact or away from the fixed contact; and
An arc extinguishing unit positioned adjacent to the fixed contact point and the arc discharge hole and extinguishing the generated arc is accommodated,
The blocking member is
a main space communicating with the arc discharge hole;
a main extension surrounding the main space; and
Comprising a sub extension surrounding the main extension,
circuit breaker for wiring. 10. The method of claim 9,
The frame is
an upper frame covering the space from the upper side; and
At the lower side of the upper frame, it includes a lower frame coupled to the upper frame,
The blocking member is
Received in the interior of the lower frame and positioned adjacent to a lower base forming a lower surface of the lower frame,
circuit breaker for wiring. 10. The method of claim 9,
The main extension of the blocking member,
a coupling part coupled to the inner case;
a first main arm connected to the coupling part and extending upwardly;
a second main arm connected to the coupling part and extending downwardly;
a third main arm that is continuous with the second main arm and extends toward one side; and
and a fourth main arm that is continuous with the third main arm and extends upward,
The main space part,
Surrounded by the first main arm, the second main arm, the third main arm and the fourth main arm,
circuit breaker for wiring. 12. The method of claim 11,
The sub extension of the blocking member,
a first sub-arm connected to the coupling part and extending obliquely downward;
a second sub-arm that is continuous with the first sub-arm and extends downward; and
and a third sub-arm that is continuous with the second sub-arm and extends toward the side from which the second main arm extends.
circuit breaker for wiring. 13. The method of claim 12,
The first sub-arm and the second sub-arm of the sub-extension part include:
spaced apart from the second main arm of the main extension in a direction opposite to the main space, a first sub-space is formed therebetween;
The third sub arm of the sub extension part,
Spaced apart from the third main arm of the main extension in a direction opposite to the main space, a second sub-space is formed therebetween,
circuit breaker for wiring. 14. The method of claim 13,
In the second sub space,
A plurality of the inner cases positioned adjacent to each other are partially accommodated,
circuit breaker for wiring. 10. The method of claim 9,
and a trip part coupled to one side of the frame and connected to the fixed contact so as to be energized,
The blocking member is
located adjacent to the trip unit,
circuit breaker for wiring.

Images