Blocking member and circuit breaker for wiring comprising the same

Abstract

Disclosed are a blocking member and a circuit breaker for wiring including the same. The circuit breaker for wiring according to an embodiment of the present invention includes a blocking member. The blocking member includes a plurality of extension portions so that a gas generated with an arc can be blocked in multiple stages. Accordingly, the gas generated with the arc cannot remain inside the circuit breaker for wiring, and can be discharged to the outside of the circuit breaker for wiring.

Description

Technical Field

[0001] The present invention relates to a blocking member and a wiring circuit breaker including the blocking member, and more specifically, to a blocking member having a structure capable of preventing gas generated with an electric arc from being trapped inside and a wiring circuit breaker including the blocking member. Background Technology

[0002] A wiring circuit breaker is a type of circuit breaker that is designed to interrupt power supply in the event of abnormal currents such as leakage or overcurrent to prevent electrical accidents.

[0003] A typical circuit breaker includes fixed contacts and movable contacts internally. During normal current flow, rather than the abnormal current described above, the fixed and movable contacts are in contact with each other and can be energized. However, in the event of an abnormal current flow, the fixed and movable contacts separate, thereby preventing energization.

[0004] When the fixed and movable contacts are separated, an electric arc is generated due to abnormal current flowing through both the fixed and movable contacts. After the generated arc undergoes an extinguishing process, it is discharged to the outside of the wiring circuit breaker.

[0005] At this time, gas is also generated along with the electric arc. In the case of an electric arc, this can be defined as the flow of electrons, which can form a magnetic field or the like to guide them outwards. In contrast, in the case of gas, it does not have a separate polarity, etc., so it is difficult to guide it out in the same way as an electric arc.

[0006] Reference Figures 1 to 5 The process of expelling the electric arc and gas generated in the existing wiring circuit breaker 1000 to the outside is explained as follows.

[0007] The existing wiring circuit breaker 1000 includes a housing 1100, a mechanism 1200, a tripping part 1300, and a blocking member 1400.

[0008] A plurality of inner housings 1120 are housed within an outer housing 1100. An opening (not shown) is formed in each inner housing 1120. Gas generated by the separation of fixed contacts (not shown) and movable contacts (not shown) within the interior space of the inner housing 1120 passes through the opening (not shown) and exits from the inner housing 1120.

[0009] The exhaust gas should be discharged to the outside of the housing 1100, rather than being retained in the internal space of the outer housing 1110. Therefore, a structure is needed to prevent the gas discharged from the inner housing 1120 from flowing into the internal space of the outer housing 1110.

[0010] The blocking member 1400 is positioned adjacent to the arc-extinguishing part 1320 disposed inside the housing 1100, thereby preventing the generated arc gas from flowing into the interior of the housing 1100.

[0011] Specifically, the blocking member 1400 is located between a plurality of internal housings 1120 disposed in the mechanism 1200. The blocking member 1400 includes a first extension 1410, a second extension 1420 and a third extension 1430, and blocks the communication between the hole (not shown) and the internal space of the outer housing 1110.

[0012] A predetermined gap may be formed between the outer housing 1110 and the blocking member 1400. Gas discharged from the inner housing 1120 flows along the gap, thereby allowing it to be discharged to the outside of the housing 1100.

[0013] At this time, the blocking member 1400 of the prior art wiring circuit breaker 1000 is arranged between the lower side of the outer box 1100 and the plurality of inner boxes 1120. Therefore, a predetermined space is formed between the blocking member 1400 and the lower side of the outer box 1100.

[0014] Therefore, a portion of the gas flowing along the interval will be trapped in the space, i.e., the stagnation space 1330. Consequently, the gas that should be discharged remains inside the outer housing 1100, potentially leading to increased contamination and reduced insulation resistance. This may reduce the operational reliability of the wiring circuit breaker 1000.

[0015] Korean Patent Registration No. 10-1320770 discloses a power-off device and a method for cooling the extinguishing gas of the power-off device. Specifically, it discloses a power-off device having a structure in which the generated gas is mixed with a cooling gas contained inside and cooled, and can flow into the blocking chamber.

[0016] However, this type of power-off device only offers solutions for cooling the generated gas, but fails to provide countermeasures to prevent the generated gas from remaining inside the circuit breaker.

[0017] Korean Patent Registration No. 10-1728496 discloses a branch circuit breaker equipped with an arc gas blocking section. Specifically, it discloses a branch circuit breaker having a structure for preventing the transfer of generated gas to the busbar by utilizing an arc gas blocking section provided with a plurality of partitions in the upper part of the front housing.

[0018] However, this type of branch circuit breaker only proposes solutions to prevent the generated gas from transferring to the sub-line busbar. That is, the limitation of the existing literature is that it does not propose solutions to prevent the generated gas from remaining in the internal space of the branch circuit breaker. Summary of the Invention

[0019] The problem that the invention aims to solve

[0020] The purpose of this invention is to provide a blocking member and a wiring circuit breaker including the blocking member, wherein the blocking member has a structure that can solve the above-mentioned problems.

[0021] Firstly, an objective is to provide a blocking member and a wiring circuit breaker including the blocking member, the blocking member having a structure capable of preventing gas generated along with an electric arc from remaining in the internal space.

[0022] Another objective is to provide a blocking member and a wiring circuit breaker including the blocking member, the blocking member having a structure capable of preventing various components from being damaged by gas generated together with an electric arc.

[0023] Another objective is to provide a blocking member and a wiring circuit breaker including the blocking member, the blocking member having a structure that can improve operational reliability.

[0024] Another objective is to provide a blocking member and a wiring circuit breaker including the blocking member, the blocking member having a structure capable of blocking the gas generated together with the electric arc in multiple stages.

[0025] Another objective is to provide a blocking member and a wiring circuit breaker including the blocking member, wherein the blocking member has a structure that can achieve the above objectives while minimizing design changes.

[0026] Technical solutions to the problem

[0027] To achieve the above objectives, the present invention provides a blocking member comprising: a connecting portion; a main extension portion continuous with the connecting portion and extending in a direction opposite to the connecting portion; and a secondary extension portion continuous with the connecting portion, spaced apart from the main extension portion, and extending in a direction opposite to the connecting portion, wherein the main extension portion includes a main space portion serving as a space between adjacent arc-extinguishing portions, and the secondary extension portion extends in a manner that surrounds the main space portion.

[0028] Additionally, the main extension of the blocking member may include: a first main arm, continuous with the connecting portion and extending in a direction opposite to the connecting portion; a second main arm, continuous with the connecting portion and extending in a direction opposite to the direction in which the first main arm extends; a third main arm, continuous with the second main arm, forming a predetermined angle with the second main arm and extending therein; and a fourth main arm, continuous with the third main arm, forming a predetermined angle with the third main arm, and extending in the direction in which the first main arm extends.

[0029] In addition, the main space portion of the blocking member can be surrounded by the second main arm, the third main arm, and the fourth main arm.

[0030] In addition, the specified angle formed by the second main arm and the third main arm of the blocking member can be less than 90°, and the specified angle formed by the third main arm and the fourth main arm can be less than 90°.

[0031] Additionally, the secondary extension of the blocking member may include: a first secondary arm, continuous with the connecting portion and extending in the opposite direction to the connecting portion; a second secondary arm, continuous with the first secondary arm, forming a predetermined angle with the first secondary arm and extending in the opposite direction to the connecting portion; and a third secondary arm, continuous with the second secondary arm, forming a predetermined angle with the second secondary arm and extending in the direction of the third main arm.

[0032] In addition, the first and second auxiliary arms of the blocking member are separated from the second main arm in the opposite direction to the main space portion, so that a first auxiliary space portion can be formed between the first and second auxiliary arms and the second main arm as a space surrounded by the first auxiliary arm, the second auxiliary arm and the second main arm.

[0033] Furthermore, the third secondary arm of the blocking member is separated from the third main arm in a direction opposite to that of the main space portion, thereby forming a second secondary space portion between the third secondary arm and the third main arm as a space surrounded by the third secondary arm and the third main arm.

[0034] In addition, a connecting hole may be formed through the interior of the connecting portion of the blocking member.

[0035] Furthermore, the present invention provides a wiring circuit breaker, comprising: a frame having a space formed therein; a plurality of internal housings housed in the space of the frame and having arc discharge holes for venting generated electric arcs; and a blocking member located between the plurality of internal housings adjacent to the arc discharge holes to block generated gas. Inside the internal housings are housed: a fixed contact electrically connected to the outside; a movable contact adjacent to the fixed contact and configured to move toward or away from the fixed contact; and an arc extinguishing portion adjacent to the fixed contact and the arc discharge holes, extinguishing the generated arc. The blocking member comprises: a main space communicating with the arc discharge holes; a main extension surrounding the main space; and a secondary extension surrounding the main extension.

[0036] Additionally, the frame of the wiring circuit breaker includes: an upper frame that covers the space from above; and a lower frame that is below the upper frame and joined to the upper frame, wherein the blocking member is housed inside the lower frame and may be located adjacent to a lower base forming the lower side of the lower frame.

[0037] Additionally, the main extension of the blocking member of the wiring circuit breaker may include: a connecting portion, which is connected to the inner housing; a first main arm, which is connected to the connecting portion and extends upward; a second main arm, which is connected to the connecting portion and extends downward; a third main arm, which is continuous with the second main arm and extends to one side; and a fourth main arm, which is continuous with the third main arm and extends upward, wherein the main space portion may be surrounded by the first main arm, the second main arm, the third main arm, and the fourth main arm.

[0038] Additionally, the secondary extension of the blocking member of the wiring circuit breaker may include: a first secondary arm connected to the connecting portion and extending obliquely downward; a second secondary arm continuous with the first secondary arm and extending downward; and a third secondary arm continuous with the second secondary arm and extending toward the side extending towards the second main arm.

[0039] Furthermore, the first and second auxiliary arms of the auxiliary extension of the wiring circuit breaker are spaced apart from the second main arm of the main extension in a direction opposite to that of the main space, so that a first auxiliary space can be formed between the first and second auxiliary arms and the second main arm. The third auxiliary arm of the auxiliary extension is spaced apart from the third main arm of the main extension in a direction opposite to that of the main space, so that a second auxiliary space can be formed between the third auxiliary arm and the third main arm.

[0040] In addition, the second secondary space of the wiring circuit breaker can partially accommodate a plurality of adjacent internal housings.

[0041] In addition, the wiring circuit breaker includes a tripping section, which is combined with one side of the frame and electrically connected to the fixed contact. The blocking member can be located adjacent to the tripping section.

[0042] Invention Effects

[0043] According to embodiments of the present invention, the following effects can be achieved.

[0044] First, a blocking member is provided between the plurality of internal chambers that generate the electric arc and gas. The blocking member includes a main space that communicates with the internal space of the internal chambers. The main space communicates with the space formed between adjacent internal chambers.

[0045] At this point, the blocking component is inserted into the space formed between the adjacent inner chambers, and the space is filled. Therefore, gas flowing into the main space cannot remain in that space and flows towards the arc discharge hole.

[0046] Therefore, the gas generated along with the electric arc does not diffuse or remain inside the wiring circuit breaker and can be discharged to the outside through the arc discharge hole.

[0047] Furthermore, the gas generated by the above-described structure does not diffuse or remain inside the wiring circuit breaker, but is discharged to the outside via the arc discharge hole. In other words, the time that the gas generated inside the inner enclosure and flowing into the main space remains within the wiring circuit breaker is minimized.

[0048] Therefore, the contact time between the various components housed within the internal space of the wiring circuit breaker and the generated gas is minimized. As a result, the various components are not damaged by the generated gas.

[0049] Furthermore, since the generated gas is discharged after remaining in the internal space of the wiring circuit breaker for a minimum period of time, damage to the various components of the wiring circuit breaker can also be minimized.

[0050] Therefore, all components can operate as expected. As a result, the operational reliability of the wiring circuit breaker can be improved.

[0051] Additionally, the blocking member includes a main extension and a secondary extension. The main extension seals a first space formed between adjacent internal housings. The secondary extension seals a second space formed between adjacent internal housings.

[0052] The first space is connected to the main space. Furthermore, the first space and the second space are connected to each other. Therefore, gas flowing into the main space is first contained within the main extension of the first space, preventing its diffusion and residue.

[0053] Furthermore, the gas passing through the first space is further contained in the secondary extension of the second space, blocking its diffusion and residue. That is, both the first and second spaces, located on the path of the generated gas flowing toward the arc discharge hole, are filled with blocking components.

[0054] Therefore, the spread and residue of the generated electric arc can be blocked in multiple stages.

[0055] Furthermore, the blocking components are located between adjacent internal enclosures. The joints, main extensions, and secondary extensions of the blocking components can be shaped to correspond to the shape of the space formed between the adjacent internal enclosures. That is, it is not necessary to make excessive structural changes to the entire wiring circuit breaker in order to install the blocking components.

[0056] Therefore, while effectively blocking the generated gas, structural changes to wiring circuit breakers can be minimized. Consequently, the blocking component can be applied to existing wiring circuit breakers, thereby increasing design freedom and reducing manufacturing time and costs. Attached Figure Description

[0057] Figure 1 This is an exploded perspective view showing a prior art circuit breaker for wiring.

[0058] Figure 2 It is shown Figure 1 A side sectional view of the interior of the wiring circuit breaker.

[0059] Figure 3 It is shown Figure 1 A front sectional view of the interior of a circuit breaker used for wiring.

[0060] Figure 4 It shows the setting in Figure 1 A three-dimensional view of the blocking component of a circuit breaker for wiring.

[0061] Figure 5 It is shown Figure 4 Side view of the blocking component.

[0062] Figure 6 This is a perspective view showing a wiring circuit breaker according to an embodiment of the present invention.

[0063] Figure 7 It is shown Figure 6 A front view of a circuit breaker used for wiring.

[0064] Figure 8 It is shown Figure 6 A side sectional view of a circuit breaker used for wiring.

[0065] Figure 9 It is shown Figure 6 An exploded 3D view of a circuit breaker used for wiring.

[0066] Figure 10 It is shown Figure 6 A side sectional view of a circuit breaker used for wiring.

[0067] Figure 11 It is set in Figure 6 A three-dimensional view of the blocking component of a circuit breaker for wiring.

[0068] Figure 12 It is shown Figure 11 A three-dimensional view of the blocking component from another angle.

[0069] Figure 13 It is shown Figure 11Side view of the blocking component.

[0070] Figure 14 This is a front sectional view showing the process of an electric arc being discharged from inside a wiring circuit breaker equipped with a blocking member according to an embodiment of the present invention. Detailed Implementation

[0071] Hereinafter, the blocking member of the present invention and the wiring circuit breaker including the blocking member will be described in detail with reference to the accompanying drawings.

[0072] In the following description, in order to clarify the features of the present invention, the description of some of the constituent elements may be omitted.

[0073] 1. Definition of terms

[0074] In the following description, the term "circuit breaker" refers to any device, such as a residual current circuit breaker or a wiring circuit breaker, that can interrupt current in the event of a leakage current or an overcurrent.

[0075] The term "normal current" as used in the following description refers to the current flowing under normal conditions when the circuit breaker is not performing a blocking operation.

[0076] The term "abnormal current" as used in the following description refers to a current that is not normal and causes the circuit breaker to perform a blocking operation. Abnormal current can include leakage current, overcurrent, undercurrent, etc.

[0077] In the following description, the term "arc" refers to a plasma of electrons and ions generated by electrodes that are in contact with each other and energized.

[0078] In the following description, the term "gas" refers to any gas that is generated with or as the electric arc is extinguished.

[0079] In the following description, the terms "front side," "rear side," "left side," "right side," "upper side," and "lower side" will be used with reference to... Figure 6 , Figure 8 as well as Figure 11 We can understand this using the coordinate system shown in the diagram.

[0080] 2. Description of the configuration of the wiring circuit breaker 10 according to an embodiment of the present invention

[0081] Reference Figures 6 to 10 The wiring circuit breaker 10 of this embodiment includes a frame 100, a mechanism 200, a tripping part 300, a power-on part 400, and an arc-extinguishing part 500.

[0082] In addition, further reference Figures 11 to 13 The wiring circuit breaker 10 of this embodiment includes a blocking member 600.

[0083] Hereinafter, with reference to the accompanying drawings, the various configurations of the wiring circuit breaker 10 according to an embodiment of the present invention will be described, and the blocking member 600 will be described separately.

[0084] (1) Explanation of frame 100

[0085] The frame 100 forms the shape of the wiring circuit breaker 10. In other words, the frame 100 functions as the housing of the wiring circuit breaker 10.

[0086] The frame 100 is the portion of the wiring circuit breaker 10 that is directly exposed to the user. Therefore, the frame 100 is preferably made of an insulating material such as plastic or synthetic resin. This prevents safety accidents that may occur in the frame 100 due to arbitrary current flow.

[0087] A space is formed inside the frame 100. Various components for interrupting power supply and extinguishing the generated electric arc when an abnormal current is present can be installed in the space.

[0088] The interior and exterior of frame 100 are electrically connected. The connection is achieved by a fixed contact 411 passing through the interior and exterior of frame 100 and engaging with frame 100.

[0089] On one side of the frame 100, i.e. the front side in the illustrated embodiment, a tripping section 300 is incorporated. The tripping section 300 can be electrically connected to an energized section 400 housed inside the frame 100.

[0090] In the illustrated embodiment, the frame 100 includes an upper frame 110, a lower frame 120, and an arc discharge hole 130.

[0091] The upper frame 110 forms the upper side of the frame 100. The upper frame 110 and the lower frame 120 are combined to form the frame 100.

[0092] A space is formed inside the upper frame 110. This space communicates with a space formed inside the lower frame 120.

[0093] The space of the upper frame 110 can partially accommodate the mechanism 200.

[0094] An opening is formed on the side of the upper frame 110 opposite to the lower frame 120, i.e., the upper side in the illustrated embodiment. A lever member provided in the mechanism 200 can pass through the opening.

[0095] Therefore, with the lever component exposed to the outside, users can easily visually identify whether the wiring circuit breaker 10 is in operation.

[0096] The lower frame 120 forms the lower side of the frame 100. The lower frame 120 is combined with the upper frame 110 to form the frame 100.

[0097] A space is formed inside the lower frame 120. This space communicates with the space formed inside the upper frame 110.

[0098] The lower frame 120 can partially accommodate the mechanism 200. Additionally, the lower frame 120 also accommodates an inner housing 210, which houses the power-conducting part 400.

[0099] As described below, there may be a plurality of internal housings 210. The plurality of internal housings 210 are arranged side by side in the space of the lower frame 120 along one direction, namely the left-right direction in the illustrated embodiment.

[0100] The lower frame 120 includes a lower base 121.

[0101] The lower base 121 forms one side of the lower frame 120, namely the lower side in the illustrated embodiment. The lower base 121 supports the inner housing 210 and the blocking member 600 on the lower side. The inner housing 210 and the blocking member 600 are located adjacent to the lower base 121.

[0102] The space of the lower frame 120 is in communication with the interior space of the inner housing 210. Gas generated in the interior space of the inner housing 210 along with the electric arc can flow into the space of the lower frame 120.

[0103] The space of the lower frame 120 is in communication with the outside. Gas flowing in from the interior space of the inner housing 210 can be discharged to the outside.

[0104] The wiring circuit breaker 10 of this embodiment can prevent the residue of gas flowing into the space of the lower frame 120. A detailed description of this will follow.

[0105] The arc vent 130 is a passage for the arc generated inside the inner housing 210 to be extinguished. Additionally, the arc vent 130 is a passage for the gas generated along with the arc to be discharged.

[0106] An arc discharge hole 130 is formed through the outer surface of the frame 100 to connect the internal space of the frame 100 with the outside.

[0107] Specifically, the arc discharge hole 130 connects the internal spaces of the upper frame 110 and the lower frame 120 to the outside. Gas generated in the inner housing 210 and flowing into the internal space of the frame 100 can be discharged to the outside through the arc discharge hole 130.

[0108] The arc discharge port 130 is connected to the inner housing 210. After the arc generated in the inner housing 210 is extinguished, it can be discharged to the outside through the arc discharge port 130.

[0109] like Figure 7 As shown, a plurality of arc discharge holes 130 are formed on the front side and communicate with the internal space of each internal housing 210. Although not shown, it is also understood that a plurality of arc discharge holes 130 are formed on the rear side and communicate with the internal space of each internal housing 210.

[0110] 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 section 500.

[0111] like Figure 8 As shown, the arc discharge hole 130 located on the front side is positioned below the arc extinguishing section 500. Conversely, the arc discharge hole 130 located on the rear side is positioned above the arc extinguishing section 500.

[0112] (2) Explanation of mechanism 200 and tripping section 300

[0113] Mechanism 200 and tripping section 300 operate when abnormal current is applied, thereby blocking the power supply between the wiring circuit breaker 10 and the external power source or load.

[0114] Mechanism 200 is connected to trip unit 300. If trip unit 300 operates (i.e., rotates), mechanism 200 can also rotate.

[0115] Mechanism 200 is connected to energized part 400. If mechanism 200 operates (i.e., rotates), movable contact 422 can be separated from fixed contact 412. Therefore, the wiring circuit breaker 10 is isolated from external power supply or load.

[0116] Mechanism 200 includes internal housing 210.

[0117] The internal housing 210 houses a power-conducting part 400 that can be electrically connected to the outside. The power-conducting part 400 housed in the internal housing 210 is connected to the mechanism 200. If the mechanism 200 is activated, the power-conducting part 400 is also activated to block the power supply between the wiring circuit breaker 10 and the external power source or load.

[0118] Inside the inner housing 210, a space is formed. An energizing unit 400 is housed within this space. Additionally, an arc-extinguishing unit 500 for extinguishing any generated electric arc is housed within the same space.

[0119] A plurality of internal housings 210 may be provided. The plurality of internal housings 210 may be spaced apart from each other and arranged side-by-side in one direction. In the illustrated embodiment, three internal housings 210 are provided and arranged spaced apart from each other in a left-right direction. A blocking member 600 is located between the plurality of internal housings 210.

[0120] This is because, in this embodiment of the invention, the wiring circuit breaker 10 connects three-phase currents of phase R, phase S, and phase T, or phase U, phase V, and phase W. The number of internal enclosures 210 can be varied according to the type of phase of the current connected by the wiring circuit breaker 10.

[0121] If the mechanism 200 and the tripping unit 300 are operated, the energized part 400, housed in the internal space of the inner housing 210, rotates to generate an electric arc and gas. After the generated electric arc passes through the arc extinguishing part 500 and is extinguished, it is discharged to the outside through the arc discharge hole 130.

[0122] At this time, a portion of the generated gas can flow into the interior space of the frame 100. The flowing gas is discharged to the outside of the frame 100 through the arc discharge hole 130.

[0123] At this time, the blocking member 600 is located between the plurality of inner chambers 210. The blocking member 600 can prevent the residue of gas flowing into the interior space of the frame 100. A detailed description of this will be given later.

[0124] An air hole 211 is formed in the inner housing 210. The air hole 211 is formed through the faces of the plurality of inner housings 210 that are opposite to each other, i.e., the faces facing the blocking member 600 in the illustrated embodiment.

[0125] The vent 211 connects the internal space of the inner box 210 with the internal space of the frame 100. Gas generated in the internal space of the inner box 210 can flow into the internal space of the frame 100 through the vent 211.

[0126] The vent 211 is connected to the main space 625 of the blocking member 600. Gas generated inside the inner housing 210 can flow to the main space 625 through the vent 211.

[0127] Gas flowing into the main space 625 can be discharged to the outside of the frame 100 through the arc discharge hole 130. A detailed description of this will be provided later.

[0128] The tripping unit 300 rotates when an abnormal current is applied, thereby causing the mechanism 200 to operate. The tripping unit 300 is electrically connected to the energizing unit 400.

[0129] The trip unit 300 includes a shooter (not shown) and a crossbar (not shown). If an abnormal current is applied, the bimetallic component or the like bends due to the generated heat, thereby striking the crossbar (not shown).

[0130] Therefore, the crossbar (not shown) rotates to strike the projection part (not shown). As a result, the mechanism 200 connected to the tripping part 300 and the energizing part 400 connected to the mechanism 200 rotate, thereby blocking the power supply between the wiring circuit breaker 10 and the external power source or load.

[0131] The operation of mechanism 200 and trip unit 300 is a well-known technology, so detailed descriptions are omitted below.

[0132] (3) Explanation of the power supply unit 400

[0133] The energizing section 400 allows or blocks the energizing between the wiring circuit breaker 10 and an external power source or load. Energizing is achieved through contact between the fixed terminal section 410 and the movable terminal section 420. Conversely, blocking is achieved by separating the fixed terminal section 410 and the movable terminal section 420.

[0134] The energizing unit 400 is housed within the internal space of the inner housing 210. The energizing unit 400 is located adjacent to the arc-extinguishing unit 500 within the internal space of the inner housing 210. The electric arc generated by the operation of the energizing unit 400 can pass through the arc-extinguishing unit 500 and be extinguished.

[0135] The energized part 400 is energized and connected to an external source. Specifically, the energized part 400 is energized and connected to an external power source or load via a fixed terminal part 410 exposed to the outside.

[0136] As described above, a tripping section 300 is attached to the front side of the frame 100. The fixed terminal section 410 located on the front side can be electrically connected to the tripping section 300.

[0137] There can be a plurality of energized parts 400. The plurality of energized parts 400 can be respectively housed in a plurality of internal housings 210. In the illustrated embodiment, there are three energized parts 400, each housed in one of three internal housings 210.

[0138] In the illustrated embodiment, the energized part 400 includes a fixed terminal part 410, a movable terminal part 420, and a rotating shaft 430.

[0139] The fixed terminal portion 410 and the movable terminal portion 420 are in contact with or separated from each other, thereby allowing or blocking the power supply to the wiring circuit breaker 10. The contact or separation can be achieved by rotating the rotating shaft 430.

[0140] The fixed terminal section 410 can be energized and connected to an external power source or load. Using the fixed terminal section 410, the wiring circuit breaker 10 can be energized and connected to an external power source or load.

[0141] A portion of the fixed terminal section 410 is housed within the interior space of the inner housing 210. As the name suggests, the fixed terminal section 410 does not move within the interior space of the inner housing 210.

[0142] Therefore, the separation between the fixed terminal portion 410 and the movable terminal portion 420 is achieved by moving the movable terminal portion 420.

[0143] The remaining portion of the fixed terminal section 410 protrudes to the outside of the inner housing 210. The remaining portion of the fixed terminal section 410 can be electrically connected to an external power source or load using a wire member (not shown) or the like.

[0144] The fixed terminal portion 410 can be provided in multiples. The multiple fixed terminal portions 410 are located on the front side and the rear side of the inner housing 210, respectively. In the illustrated embodiment, there are two fixed terminal portions 410, which are configured to be point-symmetrical with respect to the central axis of the rotation axis 430.

[0145] The plurality of fixed terminal portions 410 can be electrically connected to each other. The connection is formed by the plurality of movable terminal portions 420 contacting the plurality of fixed terminal portions 410 respectively.

[0146] The fixed terminal portion 410 is located adjacent to the arc-extinguishing portion 500. Specifically, the fixed terminal portion 410 located on the front side is above the arc-extinguishing portion 500. In addition, the fixed terminal portion 410 located on the rear side is below the arc-extinguishing portion 500.

[0147] The fixed terminal portion 410 may be formed of a conductive material. In one embodiment, the fixed terminal portion 410 may be formed of copper (Cu), iron (Fe), or the like.

[0148] The fixed terminal section 410 includes a fixed contact 411 and a fixed contact 412.

[0149] The fixed contact 411 is energized to an external power source or load. A portion of the fixed contact 411 is housed within the interior space of the inner housing 210, while the remainder protrudes to the outside of the inner housing 210. The remainder may protrude to the outside of the frame 100 or be energized to the trip unit 300.

[0150] In the illustrated embodiment, the fixing contacts 411 are respectively disposed on the front side and the rear side of the inner housing 210. The fixing contacts 411 located on the front side extend towards the front side of the inner housing 210 and are exposed, while the fixing contacts 411 located on the rear side extend towards the rear side of the inner housing 210 and are exposed.

[0151] Fixed contact 411 and fixed contact 412 can be electrically connected.

[0152] The fixed contact 412 is in contact with or separated from the movable contact 422. Therefore, the wiring circuit breaker 10 can be energized with or blocked from an external power source or load.

[0153] Fixed contact 412 is electrically connected to fixed contact 411. Fixed contact 412 can contact fixed contact 411. In one embodiment, fixed contact 412 can be integrally formed with fixed contact 411.

[0154] The fixed contact 412 located on the front side is below the fixed contact 411. The fixed contact 412 located on the rear side is above the fixed contact 411.

[0155] That is, the fixed contact 412 is positioned in the direction toward the arc extinguishing part 500, thereby partially overlapping with the arc extinguishing part 500 in the front-back direction.

[0156] Therefore, the electric arc generated when the fixed contact 412 separates from the movable contact 422 can quickly move toward the arc extinguishing part 500.

[0157] The movable terminal section 420 and the fixed terminal section 410 can be electrically connected or disconnected. Using the movable terminal section 420, a plurality of fixed terminal sections 410 can be electrically connected to each other. As a result, the wiring circuit breaker 10 can be electrically connected to an external power source or load.

[0158] The movable terminal portion 420 is housed within the internal space of the inner housing 210. As the name suggests, the movable terminal portion 420 is movably attached to the internal space of the inner housing 210.

[0159] The movable terminal portion 420 is coupled to the rotating shaft 430. If the rotating shaft 430 rotates, the movable terminal portion 420 can also rotate together with the rotating shaft 430.

[0160] The movable terminal 420 is electrically connected to the rotating shaft 430. Current flowing through the fixed terminal 410 can be transmitted to the movable terminal 420 and the rotating shaft 430.

[0161] The movable terminal portion 420 can be provided in multiples. The multiple movable terminal portions 420 are located on the front side and the rear side of the inner housing 210, respectively. In the illustrated embodiment, there are two movable terminal portions 420, which are configured to be point-symmetrical with respect to the central axis of the rotation axis 430.

[0162] The plurality of movable terminal portions 420 can be electrically contacted or separated from the plurality of fixed terminal portions 410 respectively. That is, the movable terminal portion 420 can be rotated to contact the fixed terminal portion 410, or rotated to be separated from the fixed terminal portion 410.

[0163] The contact and separation can be achieved by rotating the rotating shaft 430, which is connected to the movable terminal portion 420.

[0164] The movable terminal part 420 is located adjacent to the arc extinguishing part 500.

[0165] exist Figure 8 In the embodiment shown, the movable terminal portion 420 located on the front side is adjacent to the arc-extinguishing portion 500 on the lower side of the fixed terminal portion 410.

[0166] The movable terminal portion 420 can be separated from the fixed terminal portion 410 by rotating counterclockwise with the rotation axis 430. Alternatively, the movable terminal portion 420 can come into contact with the fixed terminal portion 410 by rotating clockwise with the rotation axis 430.

[0167] exist Figure 8 In the embodiment shown, the movable terminal portion 420 located on the rear side is adjacent to the arc-extinguishing portion 500 on the upper side of the fixed terminal portion 410.

[0168] The movable terminal portion 420 can be separated from the fixed terminal portion 410 by rotating counterclockwise with the rotation axis 430. Alternatively, the movable terminal portion 420 can come into contact with the fixed terminal portion 410 by rotating clockwise with the rotation axis 430.

[0169] That is, as the rotating shaft 430 rotates, a plurality of fixed terminal portions 410 and movable terminal portions 420 can be electrically contacted or separated from each other.

[0170] The movable terminal portion 420 may be formed of a conductive material. In one embodiment, the movable terminal portion 420 may be formed of copper (Cu), iron (Fe), or the like.

[0171] The movable terminal section 420 includes a movable contact 421 and a movable contact 422.

[0172] The movable contact 421 is electrically connected to the rotating shaft 430. If the rotating shaft 430 rotates, the movable contact 421 can also rotate. Therefore, the movable contact 421 can rotate and move in a direction toward or away from the fixed terminal portion 410.

[0173] In the illustrated embodiment, a plurality of movable contacts 421 are provided, respectively connected to the front and rear sides of the rotating shaft 430. The movable contact 421 located on the front side is electrically contacting or separated from the fixed terminal portion 410 located on the front side. The movable contact 421 located on the rear side is electrically contacting or separated from the fixed terminal portion 410 located on the rear side.

[0174] The movable contact 421 and the movable contact 422 are electrically connected.

[0175] The movable contact 422 is in contact with or separated from the fixed contact 412. Therefore, the wiring circuit breaker 10 can be energized with or blocked from an external power source or load.

[0176] The movable contact 422 is electrically connected to the movable contact 421. The movable contact 422 can contact the movable contact 421. In one embodiment, the movable contact 422 can be integrally formed with the movable contact 421.

[0177] The movable contact 422 located on the front side is above the movable contact 421. The movable contact 422 located on the rear side is below the movable contact 421.

[0178] That is, the movable contact 422 is configured to partially overlap with the arc extinguishing part 500 in the front-back direction in the direction toward the fixed contact 412.

[0179] Therefore, the electric arc generated when the fixed contact 412 separates from the movable contact 422 can move rapidly toward the arc extinguishing part 500 as the movable contact 422 extends.

[0180] The rotating shaft 430 is connected to the movable terminal portion 420, and thus rotates together with the movable terminal portion 420. By rotating the rotating shaft 430, the movable terminal portion 420 can be electrically contacted or separated from the fixed terminal portion 410.

[0181] The rotating shaft 430 is rotatably coupled to the inner housing 210. The rotating shaft 430 is rotatably accommodated within the interior space of the inner housing 210.

[0182] The rotating shaft 430 may be formed of a conductive material. In one embodiment, the rotating shaft 430 may be formed of copper (Cu), iron (Fe), or the like.

[0183] The rotating shaft 430 is connected to the movable terminal portion 420. In the illustrated embodiment, the front side of the rotating shaft 430 is connected to the movable terminal portion 420 located on the front side, and the rear side of the rotating shaft 430 is connected to the movable terminal portion 420 located on the rear side.

[0184] The rotating shaft 430 is electrically connected to the movable terminal section 420. The current flowing into the wiring circuit breaker 10 through the fixed terminal section 410 can flow to the other fixed terminal section 410 via the movable terminal section 420 and the rotating shaft 430.

[0185] If the wiring circuit breaker 10 connects to an abnormal current, the rotating shaft 430 rotates, separating the movable terminal portion 420 from the fixed terminal portion 410. In the illustrated embodiment, the rotating shaft 430 rotates counterclockwise, thereby blocking the power supply between the wiring circuit breaker 10 and an external power source or load.

[0186] (4) Explanation of the arc-extinguishing section 500

[0187] The arc extinguishing section 500 guides the electric arc generated when the fixed terminal section 410 and the movable terminal section 420 are separated due to the connection of an abnormal current. After the generated electric arc passes through the arc extinguishing section 500 and is extinguished, it is discharged to the outside of the wiring circuit breaker 10 through the arc discharge hole 130.

[0188] The arc-extinguishing unit 500 is housed within the internal space of the inner casing 210.

[0189] The arc-extinguishing part 500 is located adjacent to the fixed terminal part 410 and the movable terminal part 420. Specifically, the arc-extinguishing part 500 can be configured to overlap with the fixed contact 412 and the movable contact 422 in the left-right direction.

[0190] The arc-extinguishing part 500 can be configured in multiple ways. The multiple arc-extinguishing parts 500 can be located adjacent to the multiple fixed terminal parts 410 and the multiple movable terminal parts 420, respectively.

[0191] In the illustrated embodiment, two arc-extinguishing parts 500 are provided, and are respectively adjacent to the terminal parts 410 and 420 located on the front side and the terminal parts 410 and 420 located on the rear side.

[0192] In the illustrated embodiment, the arc-extinguishing part 500 includes a support plate 510 and a grid 520.

[0193] The support plate 510 is combined with a plurality of grilles 520. The support plate 510 can be combined with both sides of the plurality of grilles 520, i.e., the left and right sides in the illustrated embodiment.

[0194] A plurality of support plates 510 may be provided. The plurality of support plates 510 are spaced apart from each other and arranged opposite each other. In the illustrated embodiment, two support plates 510 are provided, located on the left and right sides of the grille 520, respectively. Each grille 520 can be inserted into and coupled to each support plate 510.

[0195] The support plate 510 may be formed of an insulating material. This is to prevent interference with the magnetic force of the grid 520 used to guide the generated electric arc.

[0196] The support plate 510 can be formed of a heat-resistant and pressure-resistant material. Therefore, damage or deterioration of the support plate 510 due to generated electric arcs can be prevented.

[0197] In one embodiment, the support plate 510 may be formed of reinforced plastic or the like.

[0198] The grid 520 guides the generated electric arc toward the arc-extinguishing section 500. Multiple grids 520 can be configured. Multiple grids can be stacked with spacing between them.

[0199] The grid 520 can be formed of a magnetic or magnetizable material. In one embodiment, each grid can be formed of a permanent magnet or iron (Fe).

[0200] The grille 520 is inserted into the support plate 510. Specifically, a plurality of grilles 520 are inserted into the support plate 510 respectively. At this time, each grille 520 can be inserted into the support plate 510 to be spaced apart from each other and stacked.

[0201] One side of the grille 520 facing each fixed contact 412 can be recessed. Therefore, an opening is formed inside the grille 520 that opens toward the rotation axis 430.

[0202] The movable contact 422 can pass through the opening and move. Therefore, the electric arc generated by the fixed contact 412 and the movable contact 422 being separated can elongate with the movable contact 422 and can be guided to the grid 520 by the magnetic force applied by the grid 520.

[0203] 3. Description of the blocking member 600 in an embodiment of the present invention

[0204] Reference Figures 9 to 13 The wiring circuit breaker 10 of this embodiment includes a blocking member 600.

[0205] The blocking member 600 blocks the diffusion of gas generated in the internal space of the inner housing 210 into the internal space of the frame 100. Therefore, the inflowing gas does not remain in the internal space of the frame 100 and can be discharged to the outside of the wiring circuit breaker 10.

[0206] The blocking member 600 is housed within the interior space of the lower frame 120. The blocking member 600 is located between adjacent interior housings 210.

[0207] The blocking member 600 is adjacent to the vent 211 formed through the inner housing 210. The main space 625 of the blocking member 600 is connected to the vent 211. Gas generated in the internal space of the inner housing 210 can flow to the main space 652.

[0208] A plurality of blocking members 600 may be provided. The plurality of blocking members 600 may be located in the space between adjacent internal housings 210. In the illustrated embodiment, two blocking members 600 are provided, including a first blocking member 600a and a second blocking member 600b.

[0209] The first blocking member 600a is located in the space between the two inner boxes 210 positioned on the left and in the center. The second blocking member 600b is located in the space between the two inner boxes 210 positioned in the center and on the right.

[0210] The number and configuration of the blocking components 600 can be changed according to the number and configuration of the internal enclosures 210.

[0211] The blocking member 600 can be connected to each other adjacent internal housing 210. The connection is formed by connecting the support member (not shown) to each other adjacent internal housing 210 and the connection hole 611 formed through the connection portion 610.

[0212] The blocking member 600 may be formed of an insulating material. This is to prevent interference with the magnetic force of the grid 520 used to guide the generated electric arc.

[0213] The blocking member 600 can be formed of a heat-resistant and pressure-resistant material. Therefore, damage or deterioration of the blocking member 600 due to the generated gas can be prevented.

[0214] In one embodiment, the blocking member 600 may be formed of reinforced plastic or ceramic, etc.

[0215] In the illustrated embodiment, the blocking member 600 includes a connecting portion 610, a main extension portion 620, and a secondary extension portion 630.

[0216] The joint 610 is the part where the blocking member 600 is joined to the inner housing 210. In addition, the joint 610 is connected to the main extension 620 and the secondary extension 630 respectively.

[0217] In the illustrated embodiment, the joint 610 is a cylindrical shape with a circular cross-section and extending in the left-right direction. The shape of the joint 610 can be varied according to the shape of the space formed between adjacent inner housings 210.

[0218] A connecting hole 611 is formed through the interior of the joint 610.

[0219] The connecting hole 611 is a space for connecting the blocking member 600 to the support member (not shown) of the adjacent inner box 210.

[0220] In the illustrated embodiment, the connecting hole 611 is formed as a cylindrical through hole with a circular cross-section and extending in the left-right direction. The shape of the connecting hole 611 can be varied according to the shape of the support member (not shown).

[0221] On the side of the joint 610 opposite to the lower base 121 and on the other side of the joint 610 facing the lower base 121, i.e. the upper and lower sides in the illustrated embodiment, there are continuous main extensions 620.

[0222] The main extension 620 is connected to the vent 211 to first block the residual gas flowing into the interior space of the frame 100.

[0223] Furthermore, the main extension 620 partially encloses the first space S1 formed between adjacent inner housings 210. Therefore, the incoming gas does not diffuse or remain in the interior space of the frame 100.

[0224] The shape of the main extension 620 can be determined based on the shape of the space formed between adjacent internal housings 210. Therefore, it is not necessary to make excessive changes to the structure of the wiring circuit breaker 10 in order to install the blocking member 600 of the embodiment of the present invention.

[0225] 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 portion 625.

[0226] The first main arm 621 is continuous with the joint portion 610. The first main arm 621 is formed from the side of the joint portion 610 opposite to the lower base 121, that is, the upper side in the illustrated embodiment, extending in the opposite direction (i.e., the upper side) to the joint portion 610.

[0227] In one embodiment, the first main arm 621 may extend vertically upward relative to the lower base 121.

[0228] The first main arm 621 supports the blocking member 600 from above. In other words, the first main arm 621 is the upper part of the blocking member 600 supported by the adjacent inner housings 210.

[0229] Therefore, the upper side of the blocking member 600 can be stably held in the space between adjacent inner housings 210. As a result, rotation or shaking of the blocking member 600 can be prevented.

[0230] The second main arm 622 is located on the opposite side of the first main arm 621 relative to the connecting portion 610, that is, on the lower side in the illustrated embodiment. The second main arm 622 surrounds the main space portion 625 from the front side.

[0231] The second main arm 622 is continuous with the joint portion 610. The second main arm 622 extends from the other side of the joint portion 610 toward the lower base 121, i.e., the lower side in the illustrated embodiment, in the opposite direction (i.e., the lower side) to the joint portion 610.

[0232] In one embodiment, the second main arm 622 may extend vertically downward relative to the lower base 121. That is, in this 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 located on a virtual straight line.

[0233] The second main arm 622 supports the blocking member 600 from the front side. In other words, the second main arm 622 is the front part of the blocking member 600 supported by the adjacent inner housings 210.

[0234] Therefore, the front side of the blocking member 600 can be stably held in the space between adjacent inner housings 210. As a result, rotation or wobbling of the blocking member 600 can be prevented.

[0235] The third main arm 623 extends from the side of the second main arm 622 opposite to the joint portion 610, i.e., the lower end in the illustrated embodiment. The third main arm 623 surrounds the main space portion 625 from below.

[0236] The third main arm 623 is continuous with the second main arm 622. The third main arm 623 extends from the side of the second main arm 622 opposite to the trip section 300, i.e., the rear side in the illustrated embodiment, in a direction opposite to the second main arm 622 or the trip section 300 (i.e., the rear side).

[0237] The third main arm 623 extends at a predetermined angle to the second main arm 622. In one embodiment, the third main arm 623 may extend at a right angle or an acute angle, i.e., less than 90°, relative to the second main arm 622.

[0238] The third main arm 623 supports the blocking member 600 from below. In other words, the third main arm 623 is the lower part of the blocking member 600 supported by the adjacent inner housings 210.

[0239] Therefore, the lower side of the blocking member 600 can be stably held in the space between adjacent inner housings 210. As a result, rotation or shaking of the blocking member 600 can be prevented.

[0240] Additionally, the third main arm 623 can first fill the space formed between adjacent inner chambers 210. That is, the first space S1 located on the upper side (i.e., adjacent to the vent 211) in the spaces S1 and S2 where generated gas may remain is removed by the third main arm 623.

[0241] The fourth main arm 624 extends from the side of the third main arm 623 opposite to the second main arm 622, i.e., the rear end in the illustrated embodiment. The fourth main arm 624 surrounds the main space portion 625 from the rear side.

[0242] The fourth main arm 624 is continuous with the third main arm 623. The fourth main arm 624 extends from the side of the third main arm 623 opposite to the second main arm 622, that is, the rear side in the illustrated embodiment, in the direction opposite to the lower base 121 (i.e., the upper side).

[0243] The fourth main arm 624 extends at a predetermined angle to the third main arm 623. In one embodiment, the fourth main arm 624 may extend at a right angle or an acute angle, i.e., less than 90°, relative to the third main arm 623.

[0244] It is understood that in embodiments 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 622 and the fourth main arm 624 may extend parallel to each other.

[0245] The fourth main arm 624 supports the blocking member 600 from the rear. In other words, the fourth main arm 624 is the rear portion of the blocking member 600 supported by the adjacent internal housings 210.

[0246] Therefore, the rear side of the blocking member 600 can be stably held in the space between adjacent inner housings 210. As a result, rotation or wobbling of the blocking member 600 can be prevented.

[0247] The space surrounded by the second main arm 622, the third main arm 623, and the fourth main arm 624 can be defined as the main space section 625.

[0248] The main space 625 is connected to the vent 211 formed through the inner box 210. Gas generated in the internal space of the inner box 210 can flow into the main space 625 through the vent 211.

[0249] The main space 625 is connected to the arc discharge port 130. Gas flowing into the main space 625 can flow toward the arc discharge port 130 along the space created by the gap between the adjacent internal housings 210.

[0250] At this time, the upper space S1 in the spaces S1 and S2 formed between the adjacent inner chambers 210 is first filled by the third main arm 623. Therefore, the gas flowing into the main space 625 cannot remain in the first space S1 and can flow toward the arc discharge hole 130.

[0251] The secondary extension 630 is adjacent to the second main arm 622 and the third main arm 623. The secondary extension 630 continues from the other side of the joint 610 toward the trip section 300, i.e., the rear side in the illustrated embodiment.

[0252] The secondary extension 630 further blocks the gas flowing into the main space 625, leaving it in the internal space of the frame 100.

[0253] Furthermore, the secondary extension 630 partially encloses the second space S2 formed between adjacent inner housings 210. Therefore, the incoming gas does not diffuse or remain in the interior space of the frame 100.

[0254] The shape of the secondary extension 630 can be determined based on the shape of the space formed between adjacent internal housings 210. Therefore, it is not necessary to make excessive changes to the structure of the wiring circuit breaker 10 in order to install the blocking member 600 of the embodiment of the present invention.

[0255] In the illustrated embodiment, the secondary extension 630 includes a first secondary arm 631, a second secondary arm 632, a third secondary arm 633, a first secondary space portion 634, and a second secondary space portion 635.

[0256] The first auxiliary arm 631 is continuous with the connecting portion 610. The first auxiliary arm 631 extends from the connecting portion 610 to the other side facing the tripping portion 300, that is, in the front side of the illustrated embodiment, in the opposite direction to the connecting portion 610 (i.e., the lower front side).

[0257] The first auxiliary arm 631 may extend forward at an angle relative to the lower base 121. In the illustrated embodiment, the first auxiliary arm 631 extends in such a way that the angle between the virtual straight line extending from the first auxiliary arm 631 and the lower base 121 forms an acute angle.

[0258] The first auxiliary arm 631 surrounds the joint 610, the main space 625, the second main arm 622, and the first auxiliary space 634 from the front side.

[0259] The first auxiliary arm 631 supports the blocking member 600 from the front side. In other words, the first auxiliary arm 631 is the front part of the blocking member 600 supported by the adjacent internal housings 210.

[0260] Therefore, the front side of the blocking member 600 can be stably held in the space between adjacent inner housings 210. As a result, rotation or wobbling of the blocking member 600 can be prevented.

[0261] The second auxiliary arm 632 extends from the lower front end of the first auxiliary arm 631 on the side opposite to the connecting portion 610, i.e., in the illustrated embodiment. The second auxiliary arm 632 surrounds the main space portion 625, the second main arm 622, and the first auxiliary space portion 634 from the front side.

[0262] The second auxiliary arm 632 is continuous with the first auxiliary arm 631. The second auxiliary arm 632 is formed from the side of the first auxiliary arm 631 opposite to the joint portion 610, that is, the lower side of the front in the illustrated embodiment, in a direction opposite to the first auxiliary arm 631 or the joint portion 610 (i.e., the lower side).

[0263] The second auxiliary arm 632 extends at a predetermined angle to the first auxiliary arm 631. In one embodiment, the second auxiliary arm 632 may extend at an obtuse angle to the first auxiliary arm 631.

[0264] The second auxiliary arm 632 is spaced forward and extends relative to the second main arm 622. In one embodiment, the second auxiliary arm 632 may extend parallel to the second main arm 622. The space formed by the separation of the second auxiliary arm 632 and the second main arm 622 may be defined as a first auxiliary space portion 634.

[0265] The second auxiliary arm 632 supports the blocking member 600 from the front side. In other words, the second auxiliary arm 632 is the rear part of the blocking member 600 supported by the adjacent internal housings 210.

[0266] Therefore, the front side of the blocking member 600 can be stably held in the space between adjacent inner housings 210. As a result, rotation or wobbling of the blocking member 600 can be prevented.

[0267] The third auxiliary arm 633 extends from the side of the second auxiliary arm 632 opposite to the connecting portion 610, i.e., the lower end in the illustrated embodiment. The third auxiliary arm 633 surrounds the main space portion 625, the third main arm 623, and the second auxiliary space portion 635 from below.

[0268] The third auxiliary arm 633 is continuous with the second auxiliary arm 632. The third auxiliary arm 633 extends from the side of the second auxiliary arm 632 opposite to the connecting portion 610, i.e., the lower side in the illustrated embodiment, in a direction opposite to the second auxiliary arm 632 or the trip portion 300 (i.e., the rear side).

[0269] The third auxiliary arm 633 extends at a predetermined angle to the second auxiliary arm 632. In one embodiment, the third auxiliary arm 633 may extend at a right angle or an acute angle (i.e., less than 90°) to the second auxiliary arm 632.

[0270] The third auxiliary arm 633 is spaced downward relative to the third main arm 623 and extends therefrom. In one embodiment, the third auxiliary arm 633 may extend parallel to the third main arm 623. The space formed by the separation of the third auxiliary arm 633 and the third main arm 623 may be defined as the second auxiliary space portion 635.

[0271] The third auxiliary arm 633 supports the blocking member 600 from below. In other words, the third auxiliary arm 633 is the lower part of the blocking member 600 supported by the adjacent inner housings 210.

[0272] Therefore, the lower side of the blocking member 600 can be stably held in the space between adjacent inner housings 210. As a result, rotation or shaking of the blocking member 600 can be prevented.

[0273] Furthermore, the third auxiliary arm 633 can further fill the space formed between adjacent internal housings 210. That is, the second space S2 located on the lower side (i.e., away from the vent 211) in the spaces S1 and S2 where generated gas may remain is removed by the third auxiliary arm 633.

[0274] The space surrounded by the first auxiliary arm 631, the second auxiliary arm 632 and the second main arm 622 can be defined as the first auxiliary space section 634.

[0275] The first secondary space 634 is a space into which a portion of the lower frame 120, located in the space formed between adjacent internal housings 210, is inserted. That is, the portion of the lower frame 120 is accommodated in the first secondary space 634.

[0276] Therefore, the blocking member 600 can be stably held in the space formed between adjacent inner boxes 210.

[0277] The first secondary space portion 634 extends between the joint portion 610 and the third secondary arm 633. That is, the first secondary space portion 634 extends in the opposite direction to the third secondary arm 633, i.e., the vertical direction in the illustrated embodiment.

[0278] The lower side of the first sub-space section 634 is connected to the second sub-space section 635.

[0279] The space surrounded by the third auxiliary arm 633 and the third main arm 623 can be defined as the second auxiliary space section 635.

[0280] The second auxiliary space 635 is a space for inserting another part of the lower frame 120 located between the first space S1 and the second space S2, which respectively accommodate the third main arm 623 and the third auxiliary arm 633. That is, the other part of the lower frame 120 is accommodated in the second auxiliary space 635.

[0281] Therefore, the blocking member 600 can be stably held in the space formed between adjacent inner boxes 210.

[0282] The second auxiliary space portion 635 extends in a direction away from the second auxiliary arm 632. That is, in the illustrated embodiment, the second auxiliary space portion 635 extends in the front-to-back direction.

[0283] The front side of the second sub-space section 635 communicates with the first sub-space section 634. In addition, the rear side of the second sub-space section 635 communicates with the interior space of the frame 100.

[0284] Therefore, the lower frame 120 can be accommodated in the first sub-space 634 and the second sub-space 635 respectively through the opening formed on the rear side of the second sub-space 635.

[0285] 4. Regarding the blocking member 600 and the wiring circuit breaker 10 including the blocking member 600 in the embodiments of the present invention. Explanation of the process to prevent residual gases produced.

[0286] The wiring circuit breaker 10 of this embodiment includes a blocking member 600. The blocking member 600 can prevent gas generated in the internal space of the inner housing 210 from diffusing or remaining in the internal space of the frame 100.

[0287] The following is for reference Figure 14 The process of preventing the diffusion and residue of generated gas in the blocking member 600 and the wiring circuit breaker 10 including the blocking member 600 in the embodiments of the present invention will be described in detail.

[0288] In the illustrated embodiment, the arc and gas are generated by separating the fixed contact 412 and the movable contact 422. Furthermore, the movement path of the generated gas will be understood with reference to the arrow symbols shown in the enlarged view.

[0289] The electric arc generated inside the inner housing 210 is extinguished after passing through the arc extinguishing part 500 and then discharged through the arc discharge hole 130.

[0290] At this time, a portion of the gas generated along with the electric arc flows through the vent 211 into the main space 625.

[0291] Gas flowing toward the main space 625 passes through the space formed between the adjacent internal housings 210 and flows toward the arc discharge port 130. That is, in the illustrated embodiment, the gas flows toward the lower base 121, i.e., downwards.

[0292] Gas passing through the main space section 625 reaches the first space S1, which is far from the lower base 121.

[0293] At this time, the first space S1 is in the state where the third main arm 623 with the blocking member 600 is inserted. Therefore, the first space S1 cannot ensure sufficient space for the inflowing gas to remain.

[0294] Therefore, the gas cannot remain in the first space S1 and flows toward the second space S2 located below the first space S1.

[0295] Furthermore, the second space S2 is in a state where the third auxiliary arm 633 with the blocking member 600 is inserted. Therefore, the second space S2 cannot ensure sufficient space for the inflowing gas to remain.

[0296] Therefore, the gas cannot remain in the second space S2 and flows toward the arc discharge hole 130 and is discharged to the outside of the wiring circuit breaker 10.

[0297] Therefore, the generated gas cannot diffuse or remain in the internal space of the frame 100 and can be discharged to the outside of the wiring circuit breaker 10. Thus, it is possible to prevent the increase in contamination, the decrease in insulation resistance, and the increase in leakage current that may result from the generated gas remaining inside the wiring circuit breaker 10.

[0298] While the above description has been made with reference to preferred embodiments of the present invention, it is understood that those skilled in the art can make various modifications and alterations to the present invention without departing from the spirit and scope of the invention as set forth in the following claims.

Claims

1. A blocking member for blocking gas generated together with an electric arc in the internal space of a circuit breaker. in, include: Joint; The main extension is continuous with the joining portion and extends in a direction away from the joining portion; and The secondary extension is continuous with the connecting portion, spaced apart from the main extension, and extends parallel to the main extension. The main extension surrounds the main space portion, which serves as the space between adjacent arc-extinguishing portions, and seals the first space formed between the internal housings of adjacent circuit breakers. The secondary extension surrounds the main space and seals the second space formed between the internal housings of adjacent circuit breakers.

2. The blocking member according to claim 1, wherein, The main extension includes: The first main arm is continuous with the joint portion and extends in a direction away from the joint portion; The second main arm is continuous with the connecting portion and extends in a direction opposite to the direction in which the first main arm extends. The third main arm is continuous with the second main arm, forms a predetermined angle with the second main arm, and extends therefrom; and The fourth main arm is continuous with the third main arm, forms a predetermined angle with the third main arm, and extends in the direction in which the first main arm extends.

3. The blocking member according to claim 2, wherein, The main space is surrounded by the second main arm, the third main arm, and the fourth main arm.

4. The blocking member according to claim 2, wherein, The specified angle formed by the second main arm and the third main arm is 9 degrees. the following, The specified angle formed by the third main arm and the fourth main arm is 9 degrees. the following.

5. The blocking member according to claim 2, wherein, The secondary extension includes: The first secondary arm is continuous with the joint portion and extends in a direction away from the joint portion; The second auxiliary arm is continuous with the first auxiliary arm, forms a predetermined angle with the first auxiliary arm, and extends in a direction away from the joint; and The third auxiliary arm is continuous with the second auxiliary arm, forms a predetermined angle with the second auxiliary arm, and extends in the direction of the third main arm.

6. The blocking member according to claim 5, wherein, The first and second auxiliary arms are separated from the second main arm in a direction away from the main space portion, thereby forming a first auxiliary space portion between the first and second auxiliary arms and the second main arm, which is a space surrounded by the first auxiliary arm, the second auxiliary arm and the second main arm.

7. The blocking member according to claim 5, wherein, The third auxiliary arm is separated from the third main arm in a direction away from the main space portion, thereby forming a second auxiliary space portion between the third auxiliary arm and the third main arm, which serves as a space surrounded by the third auxiliary arm and the third main arm.

8. The blocking member according to claim 1, wherein, A connecting hole is formed through the interior of the joint.

9. A circuit breaker for wiring, in, include: The framework creates space within it; A plurality of internal housings are accommodated in the space of the frame and are formed with arc discharge holes for the discharge of generated electric arcs; and A blocking member, located adjacent to the arc discharge port among the plurality of said internal housings, blocks the generated gas. The interior of the inner housing contains: Fixed contacts for connection to an external electrically conductive ground; A movable contact, adjacent to the fixed contact, is configured to move toward or away from the fixed contact; and The arc-extinguishing section is adjacent to the fixed contact and the arc discharge hole, and extinguishes the generated arc. The blocking component includes: The main space section is connected to the arc discharge hole; The main extension surrounds the main space and seals the first space formed between adjacent internal housings; and A secondary extension surrounds the main extension and seals the second space formed between adjacent internal housings.

10. The wiring circuit breaker according to claim 9, wherein, The framework includes: The upper frame covers the space from above; and The lower frame is located below the upper frame and is integrated with the upper frame. The blocking member is housed inside the lower frame and is located adjacent to the lower base forming the lower side of the lower frame.

11. The circuit breaker for wiring according to claim 9, wherein, The main extension of the blocking member includes: The connecting part is connected to the internal housing; The first main arm is connected to the connecting part and extends upward; The second main arm is connected to the connecting part and extends downward; The third main arm is continuous with the second main arm and extends to one side; and The fourth main arm is continuous with the third main arm and extends upward. The main space is surrounded by the first main arm, the second main arm, the third main arm, and the fourth main arm.

12. The circuit breaker for wiring according to claim 11, wherein, The secondary extension of the blocking member includes: The first auxiliary arm is connected to the connecting part and extends obliquely downward; The second auxiliary arm is continuous with the first auxiliary arm and extends downward; and The third auxiliary arm is continuous with the second auxiliary arm and extends toward the side that extends toward the second main arm.

13. The circuit breaker for wiring according to claim 12, wherein, The first and second auxiliary arms of the auxiliary extension are spaced apart from the second main arm of the main extension in a direction away from the main space, so that a first auxiliary space is formed between the first and second auxiliary arms and the second main arm. The third secondary arm of the secondary extension is spaced apart from the third main arm of the main extension in a direction away from the main space, so that a second secondary space is formed between the third secondary arm and the third main arm.

14. The wiring circuit breaker according to claim 13, wherein, The second secondary space partially accommodates a plurality of the aforementioned internal boxes that are adjacent to each other.

15. The circuit breaker for wiring according to claim 9, wherein, include: The trip unit is attached to one side of the frame and is electrically connected to the fixed contact. The blocking component is located adjacent to the tripping section.

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