Movable contact portion and circuit breaker including the same

Abstract

The invention discloses a movable contact portion and a circuit breaker including the same. A movable contact part according to one aspect of the present invention may comprise: a movable terminal electrically connected to an external power source or load; a movable cable coupled to the movable terminal and energized, the movable cable extending to the outside of the movable terminal; and a movable contact table coupled to the movable cable and energized, the movable contact table being provided so as to be rotatable. The movable terminal may include: an insertion space formed to pass through the inside of the movable terminal and to accommodate the movable cable; and a cushion space which is formed through the inside of the movable terminal, communicates with the insertion space, and is located between the insertion space and one end of the movable terminal in the longitudinal direction. When an external force is applied to the movable terminal, the one end portion of the movable terminal is pressed toward the insertion space, thereby reducing the cushion space.

Description

Technical Field

[0001] The present invention relates to a movable contact portion and a circuit breaker including the movable contact portion, and more particularly, to a movable contact portion having a structure capable of improving assembly convenience and a circuit breaker including the movable contact portion. Background Art

[0002] The circuit breaker can prevent damage to the power supply and the load by energizing the power supply and the load respectively. The circuit breaker is provided with a plurality of contacts that can be contacted or separated from each other.

[0003] When the multiple contacts are in contact, the external power source and load can be energized, allowing current to flow. If an abnormal current is detected, the multiple contacts separate. This disconnects the power supply and load, preventing damage to the power source and load caused by the abnormal current.

[0004] Some of the contacts are fixed at specific locations. These contacts are called "fixed contacts." The remaining contacts are movable in a direction opposite to the fixed contacts. These contacts are called "movable contacts."

[0005] The fixed contact and the movable contact are respectively connected to other components exposed to the outside and are energized. An external power source and load can be energized to the fixed contact and the movable contact respectively through the other components.

[0006] In this case, the movable contact and the other components are electrically connected to each other through a cable formed of a flexible material. In this case, the components are press-coupled to the other components, but due to the flexibility of the material of the components, it is difficult to accurately perform press coupling.

[0007] Korean Patent No. 10-1754343 discloses a terminal block for a power system control circuit for power substation equipment. Specifically, the terminal block has a structure capable of combining core material, conductors, and the like using first to third wire pressing portions.

[0008] However, the connection terminal unit for the power system control circuit for substation equipment disclosed in the prior art is predicated on being installed in the control circuit itself. In other words, when applied to a structure that may be damaged by abnormal current, the prior art does not provide a solution for preventing damage to the structure or for providing arbitrary separation between structures even when abnormal current is generated.

[0009] Korean Patent No. 10-0817117 discloses a movable contact for an air circuit breaker. Specifically, the movable contact has a structure that allows the load-side terminal and the lead wire to be connected by inserting the lead wire into a space formed in the load-side terminal and pressing it.

[0010] However, the prior art document only discloses a structure for bonding the load-side terminal and the lead wire, that is, the prior art document does not disclose a solution for eliminating the generation of residual space caused by deformation of the lead wire during bonding.

[0011] Korean Patent No. 10-1754343 (July 12, 2017)

[0012] Korean Patent No. 10-0817117 (March 27, 2008) Summary of the Invention

[0013] Problems to be solved by the invention

[0014] The present invention aims to solve the above-mentioned problems, and an object thereof is to provide a movable contact portion having a structure that can easily connect a member that is energized to the outside and a cable, and a circuit breaker including the movable contact portion.

[0015] Another object of the present invention is to provide a movable contact portion having a structure capable of stably coupling a member and a cable that are electrically connected to the outside, and a circuit breaker including the movable contact portion.

[0016] Another object of the present invention is to provide a movable contact portion having a structure capable of stably maintaining a coupled state with a member or cable that is electrically connected to the outside, and a circuit breaker including the movable contact portion.

[0017] Still another object of the present invention is to provide a movable contact portion to which various modifications can be applied, and a circuit breaker including the movable contact portion.

[0018] The objects of the present invention are not limited to the above-mentioned contents, and other objects not mentioned can be clearly understood by those skilled in the art from the following description.

[0019] Technical solutions to the problem

[0020] According to one aspect of the present invention, a movable contact portion is provided, comprising: a movable terminal electrically connected to an external power supply or load; a movable cable coupled to the movable terminal and energized, and extending outward from the movable terminal; and a movable contact platform coupled to the movable cable and energized, and rotatably configured; the movable terminal comprising: an insertion space formed through the interior of the movable terminal and accommodating the movable cable; and a buffer space formed through the interior of the movable terminal and connected to the insertion space, and located between the insertion space and one end portion of the movable terminal in the longitudinal direction; if an external force is applied to the movable terminal, the one end portion of the movable terminal is pressurized toward the insertion space, thereby shrinking the buffer space.

[0021] In this case, a movable contact portion may be provided, wherein the movable cable includes a coupling end portion formed at one end portion along an extending direction thereof and inserted and coupled to the insertion space.

[0022] Furthermore, the movable contact portion may be provided, wherein the cross-sectional area of ​​the insertion space is formed to be larger than the cross-sectional area of ​​the coupling end portion.

[0023] In this case, a movable contact portion may be provided, wherein the insertion space extends along the length direction of the movable terminal, and the buffer space extends along the width direction of the movable terminal.

[0024] In addition, a movable contact portion can be provided, wherein the extension length of the movable terminal in one direction is formed to be longer than the extension length in another direction; the insertion space is formed in plurality, and the plurality of insertion spaces are arranged spaced apart from each other along the other direction; the buffer space is formed extending along the other direction and is respectively connected to the plurality of insertion spaces.

[0025] In this case, a movable contact portion may be provided, wherein the insertion space and the buffer space are located at positions deviated toward the one end portion in the one direction of the movable terminal.

[0026] In addition, a movable contact portion may be provided, wherein the external force is applied to the one end portion of the movable connecting terminal, so that the movable connecting terminal and the movable cable are pressed and coupled.

[0027] At this time, a movable contact portion may be provided, wherein the buffer space is formed longer in the width direction of the movable terminal; and the insertion space is formed longer in the length direction of the movable terminal at a position adjacent to one end of the buffer space.

[0028] In addition, a movable contact portion may be provided, including a movable cover body respectively coupled to the movable terminal and the movable contact base.

[0029] At this time, a movable contact portion can be provided, wherein the movable cover body includes: a main cover body that movably accommodates the movable contact stage; a support plate that is combined with the main cover body and is configured to surround the movable terminal and a portion of the movable contact stage; and a rotating cover body that is combined with the support plate and rotatably supports the movable contact stage.

[0030] Furthermore, a movable contact portion may be provided, wherein the movable cover includes a rotating shaft penetrating and coupled to the movable contact base and the rotating cover.

[0031] In addition, according to one aspect of the present invention, a circuit breaker can be provided, comprising: a circuit breaker cover, in which a cover space is formed; a fixed contact portion, a portion of which is accommodated in the cover space and fixedly coupled to the circuit breaker cover; and a movable contact portion, a portion of which is accommodated in the cover space and is located adjacent to the fixed contact portion and movably coupled to the circuit breaker cover; the fixed contact portion comprises: a fixed wiring terminal exposed to the outside of the cover space and electrically connected to either an external power supply or a load; and a fixed contact, accommodated in the cover space and coupled to the fixed wiring terminal and electrically coupled; the movable contact portion comprises: a movable wiring terminal The terminal is exposed to the outside of the cover space and is electrically connected to the other of the external power supply and the load; the movable cable is accommodated in the cover space and is combined with the movable terminal and is energized; and the movable contact base is accommodated in the cover space and is combined with the movable cable and is energized; the movable terminal includes: an insertion space formed through the interior of the movable terminal and accommodating the movable cable; and a buffer space formed through the interior of the movable terminal and connected to the insertion space; if an external force is applied to the movable terminal, the cross-sectional area of ​​the insertion space is reduced, so that the movable terminal and the movable cable are extruded and combined.

[0032] In this case, a circuit breaker may be provided, wherein the insertion space and the buffer space are located toward one end portion of the movable terminal that is accommodated in the cover space.

[0033] Furthermore, a circuit breaker may be provided in which, before the external force is applied, the cross-sectional area of ​​the insertion space is formed to be larger than the cross-sectional area of ​​one end portion of the movable cable accommodated in the insertion space.

[0034] Effects of the Invention

[0035] According to the above configuration, the movable contact portion and the circuit breaker including the movable contact portion according to the embodiment of the present invention can easily be connected to components and cables that are electrically connected to the outside.

[0036] The movable contact portion includes a movable terminal electrically connected to an external power source or load. The movable terminal is connected to the movable contact base via a movable cable and electrically connected.

[0037] An insertion space is formed through the interior of the movable terminal. A connecting end portion forming one end portion of the movable cable is accommodated in the insertion space. The insertion space can be formed to have a larger cross-sectional area than the connecting end portion so that the connecting end portion can be easily accommodated in the insertion space.

[0038] A buffer space is formed through the movable terminal and communicated with the insertion space.

[0039] In one embodiment, the movable terminal and the movable cable can be extruded and joined together by applying an external force. In this case, the deformed portion of the movable terminal caused by the external force flows into the buffer space, preventing it from protruding outward from the movable terminal. Furthermore, the insertion space is reduced, and the accommodated joining end portion is squeezed, allowing the movable terminal and the movable cable to join.

[0040] Therefore, the movable terminal and the movable cable can be easily combined.

[0041] Furthermore, according to the above configuration, the movable contact portion and the circuit breaker including the movable contact portion according to the embodiment of the present invention can stably couple components and cables that are electrically connected to the outside.

[0042] In one embodiment, the insertion space and the buffer space may be located at one end portion of the movable terminal, which is offset from the direction in which the movable terminal extends. In this case, the insertion space and the buffer space are spaced apart from the one end portion of the movable terminal, so that the movable terminal does not open outward along its extension direction. In other words, no separate opening is formed on the outer edge of the movable terminal.

[0043] Therefore, when external force is applied to the movable terminal, deformation of the movable terminal can be minimized. Furthermore, the movable cable accommodated in the insertion space is prevented from being drawn outward from the movable terminal. As a result, the connection process between the movable terminal and the movable cable can be performed stably.

[0044] Furthermore, according to the above configuration, the movable contact portion and the circuit breaker including the movable contact portion according to the embodiment of the present invention can stably maintain the connection state with externally energized members and cables.

[0045] As described above, after the connecting end is accommodated in the insertion space, the movable terminal and the movable cable are extruded and bonded together by external force. At this point, no separate opening is formed on the outer edge of the movable terminal. Therefore, both before and after the application of external force, the connecting end, while accommodated in the insertion space, is positioned so as to be surrounded by the inner periphery of the movable terminal.

[0046] In addition, a portion of the movable terminal that is deformed in shape due to application of an external force flows into the buffer space or the insertion space, thereby supporting the coupled end portion of the movable cable.

[0047] Thereby, the coupled state of the movable terminal and the movable cable can be stably maintained.

[0048] Furthermore, according to the above-described configuration, various modifications can be applied to the movable contact portion and the circuit breaker including the movable contact portion according to the embodiment of the present invention.

[0049] The insertion space may be formed into a shape corresponding to the shape of the connecting end of the movable cable. In one embodiment, the movable cable and the insertion space may be formed to have a polygonal cross-section. In another embodiment, the movable cable and the insertion space may be formed to have a circular cross-section.

[0050] In either case, the insertion space is formed to have a cross-sectional area larger than that of the movable cable, so that the coupling end portion can be easily accommodated in the insertion space. In addition, the coupling end portion accommodated in the insertion space can be squeezed and supported by the inner peripheral surface of the movable cable that has been deformed by the application of external force.

[0051] Therefore, even when the shape of the movable cable is deformed, the shape of the insertion space is also deformed accordingly, and the movable cable can be used in various forms.

[0052] The effects of the present invention are not limited to the above-described effects, but should be understood to include all effects that can be inferred from the detailed description of the present invention or the configuration of the invention described in the claims. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] Figure 1 It is a perspective view showing a circuit breaker according to an embodiment of the present invention.

[0054] Figure 2 It shows Figure 1 AA cross-sectional view of the circuit breaker.

[0055] Figure 3 It shows that the Figure 1 Exploded perspective view of the structure of a circuit breaker.

[0056] Figure 4 It shows the setting Figure 1 A three-dimensional view of the movable contact portion of a circuit breaker.

[0057] Figure 5 It shows Figure 4 Exploded perspective view of the movable contact portion.

[0058] Figure 6 It shows Figure 4 A three-dimensional view of the movable contact portion from another angle.

[0059] Figure 7 It shows Figure 4 Exploded perspective view of the movable contact portion.

[0060] Figure 8 It shows that the Figure 4 A front view of the movable terminal of the movable contact portion.

[0061] Figure 9 Is shown assembled Figure 4 The diagram shows the usage status of the movable contact part during the process.

[0062] Figures 10 and 11 This is a diagram showing a usage state of a movable contact portion according to another embodiment of the present invention. DETAILED DESCRIPTION

[0063] Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily implement the present invention. The present invention can be implemented in a variety of different forms and is not limited to the embodiments described herein. To clearly illustrate the present invention, portions not relevant to the description are omitted from the accompanying drawings. Identical or similar components are denoted by the same reference numerals throughout the specification.

[0064] The words and terms used in this specification and claims should not be limited to the conventional or dictionary meanings, but should be interpreted as meanings and concepts consistent with the technical ideas of the present invention based on the principle that the inventor has the right to define terms and concepts in order to best explain his invention.

[0065] Therefore, the embodiments described in this specification and the configuration shown in the accompanying drawings only correspond to a preferred embodiment of the present invention and cannot fully represent the technical concept of the present invention. When the present invention is applied for, the configuration may have multiple equivalent replacement schemes and variations.

[0066] In the following description, description of some components may be omitted to clarify the features of the present invention.

[0067] The term "connected" as used in the following description refers to one or more components being connected in a manner that allows fluid flow. In one embodiment, this connection can be achieved through components such as pipes, ducts, and tubing. In the following description, the term "connected" can also be used synonymously to mean "fluidically connected" between one or more components.

[0068] The term "energized" as used in the following description refers to one or more components being connected in a manner capable of transmitting current or electrical signals. In one embodiment, energization can be achieved through a wired method such as a wired component, or through a wireless method such as Bluetooth, Wi-Fi, or RFID (radio frequency identification). In one embodiment, energization can also include the meaning of "communication."

[0069] The term "fluid" mentioned in the following description refers to any substance that flows under the action of an external force and can be deformed in shape or volume. In one embodiment, the fluid can be a liquid such as water or a gas such as air.

[0070] The terms "upper side", "lower side", "left side", "right side", "front side" and "rear side" mentioned in the following description can refer to Figure 1 The coordinate system shown can be understood.

[0071] Reference Figures 1 to 3 , showing a circuit breaker 10 according to an embodiment of the present invention. The circuit breaker 10 is electrically connected to an external power source and a load. In one embodiment, the circuit breaker 10 can be electrically connected to an external power source and a load via a wire member (not shown).

[0072] In one embodiment, the circuit breaker 10 of the embodiment of the present invention may be formed as an air circuit breaker (ACB). However, the features of the circuit breaker 10 or the movable contact unit 400 of the embodiment of the present invention described later can be applied to various types of circuit breakers, such as vacuum circuit breakers (VCB) and molded case circuit breakers (MCCB).

[0073] Since the process of the circuit breaker 10 allowing or cutting off the power supply between the external power supply and the load by respectively energizing the external power supply and the load is a well-known technology, a detailed description thereof will be omitted.

[0074] In the illustrated embodiment, the circuit breaker 10 includes a circuit breaker cover 100 , an arc extinguishing portion 200 , a fixed contact portion 300 , and a movable contact portion 400 .

[0075] The circuit breaker cover 100 forms the outer shape of the circuit breaker 10. A space (cover space 110 described later) may be formed inside the circuit breaker cover 100 to accommodate various components of the circuit breaker 10.

[0076] The circuit breaker cover 100 can be electrically connected to an external power source and a load, respectively, by means of the fixed contact portion 300 and the movable contact portion 400 housed in the circuit breaker cover 100 .

[0077] The circuit breaker cover 100 is coupled to the arc extinguishing unit 200. The circuit breaker cover 100 can be coupled to the arc extinguishing unit 200 so that the arc extinguishing unit 200 communicates with the outside. In the illustrated embodiment, the arc extinguishing unit 200 is coupled to the upper front portion of the circuit breaker cover 100.

[0078] The circuit breaker cover 100 is coupled to the fixed contact unit 300. The circuit breaker cover 100 can house the fixed contact unit 300 with a portion of the fixed contact unit 300 exposed to the outside. In the illustrated embodiment, the fixed contact unit 300 is located at the front side of the circuit breaker cover 100 and below the arc extinguishing unit 200.

[0079] The circuit breaker cover 100 is coupled to the movable contact unit 400. The circuit breaker cover 100 can removably accommodate the movable contact unit 400, with a portion of the movable contact unit 400 exposed to the outside. In the illustrated embodiment, the movable contact unit 400 is located on the front side of the circuit breaker cover 100 and below the fixed contact unit 300.

[0080] The circuit breaker cover 100 may be formed of an electrically insulating material to prevent any electrical conduction between the components housed in the circuit breaker cover 100 and an external power source or load.

[0081] The circuit breaker cover 100 may be formed of a heat-insulating material to prevent damage caused by heat or pressure generated when an abnormal current flows.

[0082] In one embodiment, the circuit breaker cover 100 may be formed of a synthetic resin material.

[0083] The circuit breaker cover 100 can be combined with each component of the circuit breaker 10 and can have any shape that accommodates each component so that each component can be electrically connected to the outside. In the illustrated embodiment, the circuit breaker cover 100 has a polygonal prism shape with a horizontally rectangular cross-section and a vertically extending height.

[0084] In the illustrated embodiment, the circuit breaker enclosure 100 includes an enclosure space 110 .

[0085] The cover space 110 is a space formed inside the circuit breaker cover 100. The cover space 110 accommodates the arc extinguishing unit 200, the fixed contact unit 300, and the movable contact unit 400.

[0086] In the illustrated embodiment, the arc extinguishing unit 200, the fixed contact unit 300, and the movable contact unit 400 are located in the front side of the housing space 110. At this time, the arc extinguishing unit 200, the fixed contact unit 300, and the movable contact unit 400 are arranged in order from top to bottom.

[0087] The housing space 110 is defined by the inner surface of the circuit breaker housing 100. The housing space 110 may be shaped to correspond to the shape of the circuit breaker housing 100. In the illustrated embodiment, the housing space 110 has a polygonal column shape having a rectangular cross section and a height in the vertical direction.

[0088] The housing space 110 is electrically connected to an external power source and load. Specifically, one of the fixed contact unit 300 and the movable contact unit 400 housed in the housing space 110 is electrically connected to the external power source. Furthermore, the other of the fixed contact unit 300 and the movable contact unit 400 housed in the housing space 110 is electrically connected to the external load.

[0089] The housing space 110 is in communication with the outside. Consequently, the arc extinguishing unit 200 housed in the housing space 110 is also in communication with the outside, extinguishing the arc generated by the separation of the fixed contact unit 300 and the movable contact unit 400 and discharging it to the outside. In the illustrated embodiment, the arc extinguishing unit 200, located on the upper side of the housing space 110, is in communication with the outside.

[0090] The arc extinguishing unit 200 extinguishes the arc generated by the separation of the fixed contact 320 of the fixed contact unit 300 and the movable contact 450 of the movable contact unit 400. The generated arc can be separated and extinguished by the arc extinguishing unit 200 and discharged to the outside. The arc extinguishing unit 200 communicates with the housing space 110 and the outside.

[0091] The arc extinguishing unit 200 is coupled to the circuit breaker housing 100 and is accommodated in the housing space 110. In the illustrated embodiment, the arc extinguishing unit 200 is located at a front side that is biased toward the upper side of the housing space 110.

[0092] The arc extinguishing unit 200 can be located adjacent to the fixed contact 320. Thus, the arc generated by the separation of the fixed contact 320 and the movable contact 450 can quickly move to the arc extinguishing unit 200. In the illustrated embodiment, the arc extinguishing unit 200 is located toward the front of the housing space 110 and above the fixed contact unit 300.

[0093] The arc extinguishing portion 200 can extend along the direction of movement of the movable contact stage 440. In the illustrated embodiment, the movable contact stage 440 is configured to be movable clockwise or counterclockwise relative to the fixed contact 320. The arc extinguishing portion 200 extends in a direction away from the fixed contact 320, that is, in the illustrated embodiment, toward the rear of the movable contact stage 440.

[0094] The arc extinguishing portion 200 may be provided in a plurality and may be spaced apart from each other and respectively located adjacent to the plurality of fixed contact portions 300 .

[0095] In the illustrated embodiment, three arc extinguishing units 200 are provided and spaced apart from each other along the width direction, i.e., the left-right direction, of the circuit breaker housing 100. The number of arc extinguishing units 200 can be changed in accordance with the number of phases of current flowing through the circuit breaker 10 or the number of fixed contact units 300.

[0096] The fixed contact portion 300 can be defined as a component that electrically connects the circuit breaker 10 to an external power source or load. The fixed contact portion 300 is electrically connected to either the external power source or the load.

[0097] The fixed contact unit 300 is coupled to the circuit breaker cover 100. A portion of the fixed contact unit 300 can be accommodated in the cover space 110, while the remaining portion of the fixed contact unit 300 can be exposed to the outside of the circuit breaker cover 100. An external power source or load can be electrically coupled to the remaining portion of the fixed contact unit 300.

[0098] As the name implies, the fixed contact unit 300 is fixedly coupled to the circuit breaker cover 100. In other words, the fixed contact unit 300 is held in a fixed position relative to the circuit breaker cover 100 or the movable contact unit 400 coupled thereto. Therefore, the contact and separation between the fixed contact unit 300 and the movable contact unit 400, and the resulting energization and disconnection of an external power source and load, are achieved through the movement of the movable contact unit 400.

[0099] The fixed contact portion 300 is located adjacent to the arc extinguishing portion 200 and the movable contact portion 400. As the movable contact portion 400 moves, the arc extending from the fixed contact portion 300 can quickly move to the arc extinguishing portion 200 and be extinguished.

[0100] In the illustrated embodiment, the fixed contact portion 300 is located between the arc extinguishing portion 200 and the movable contact portion 400. In other words, the fixed contact portion 300 is located below the arc extinguishing portion 200 and above the movable contact portion 400.

[0101] A plurality of fixed contact units 300 may be provided. The plurality of fixed contact units 300 may be spaced apart from one another and may be respectively located between the plurality of arc extinguishing units 200 and the plurality of movable contact units 400. In the illustrated embodiment, three fixed contact units 300 are provided and spaced apart from one another along the width direction of the circuit breaker cover 100, i.e., along the left-right direction in the illustrated embodiment.

[0102] In the illustrated embodiment, the fixed contact portion 300 includes a fixed terminal 310 and a fixed contact 320 .

[0103] The fixed terminal 310 forms a component of the fixed contact unit 300. A portion of the fixed terminal 310 is housed within the housing space 110. In other words, a portion of the fixed terminal 310 is exposed to the outside of the circuit breaker housing 100, while the remaining portion of the fixed terminal 310 is housed within the housing space 110. In the illustrated embodiment, a portion of the front side of the fixed terminal 310 is exposed to the outside.

[0104] The portion of the fixed terminal 310, that is, the portion exposed to the outside of the circuit breaker cover 100, is electrically connected to an external power source or load. The connection can be made through a wire member (not shown) or a connector member (not shown).

[0105] The other portion of the fixed terminal 310, i.e., the portion housed in the housing space 110, is coupled to the fixed contact 320. The other portion of the fixed terminal 310 is electrically connected to the fixed contact 320. That is, the fixed terminal 310 is electrically connected to the movable contact portion 400 via the fixed contact 320.

[0106] The fixed terminal 310 can have any shape that can electrically connect to an external power source and load and the fixed contact 320. In the illustrated embodiment, the fixed terminal 310 is configured as a polygonal plate having a rectangular cross-section and a thickness in the vertical direction.

[0107] The fixed terminal 310 extends in one direction, in the front-to-back direction in the embodiment shown. The front side of the fixed terminal 310 is exposed outside the circuit breaker cover 100, and the rear side of the fixed terminal 310 is accommodated in the cover space 110 and connected to the fixed contact 320.

[0108] The fixed contact 320 is coupled to the fixed terminal 310. The fixed contact 320 and the fixed terminal 310 are electrically connected to an external power source or load coupled to the fixed terminal 310.

[0109] Furthermore, the fixed contact 320 contacts or separates from the movable contact 450 as the movable contact portion 400 moves. The fixed contact 320 is energized via the movable contact 450 and the movable terminal 420 and an external power source or load coupled to the movable terminal 420.

[0110] The fixed contact 320 is accommodated in the housing space 110. The fixed contact 320 is coupled to another portion of the portion of the fixed terminal 310 accommodated in the housing space 110, and in the illustrated embodiment, is coupled to the rear side.

[0111] The fixed contact 320 is located adjacent to the arc extinguishing portion 200. When an abnormal current is generated, the arc formed from the fixed contact 320 can move to the arc extinguishing portion 200 and be extinguished. In the illustrated embodiment, the fixed contact 320 is located on the lower side of the arc extinguishing portion 200.

[0112] As the movable contact portion 400 moves, the fixed contact 320 can come into contact with or be separated from the movable contact 450. Figure 2 In the illustrated embodiment, if the movable contact 450 moves counterclockwise, the fixed contact 320 and the movable contact 450 may come into contact. Alternatively, if the movable contact 450 moves clockwise, the fixed contact 320 and the movable contact 450 may separate.

[0113] The movable contact portion 400 can be defined as another component that allows the circuit breaker 10 to be electrically connected to an external power source or load. The movable contact portion 400 is electrically connected to the other of the external power source and the load.

[0114] The movable contact unit 400 is coupled to the circuit breaker cover 100. A portion of the movable contact unit 400 can be housed within the cover space 110, while the remaining portion of the movable contact unit 400 can be exposed outside the circuit breaker cover 100. The other of the external power source and load is electrically connected to the remaining portion of the movable contact unit 400.

[0115] As the name implies, the movable contact unit 400 is movably coupled to the circuit breaker cover 100. In other words, the movable contact unit 400 can change its relative position with respect to the adjacent fixed contact unit 300. Therefore, as described above, the fixed contact unit 300 and the movable contact unit 400 can be brought into and out of contact with each other, and thus energized and disconnected from an external power source and load, by the movement of the movable contact unit 400.

[0116] The movable contact unit 400 is located adjacent to the arc extinguishing unit 200 and the fixed contact unit 300. In the illustrated embodiment, the movable contact unit 400 is located below the arc extinguishing unit 200 and the fixed contact unit 300. In this case, a portion of the movable contact unit 400 is located below the arc extinguishing unit 200 and adjacent to the rear side of the fixed contact unit 300.

[0117] A plurality of movable contact units 400 may be provided. The plurality of movable contact units 400 may be spaced apart from one another and may be located adjacent to the plurality of arc extinguishing units 200 and the plurality of fixed contact units 300. In the illustrated embodiment, three movable contact units 400 are provided and spaced apart from one another along the width direction of the circuit breaker cover 100. In the illustrated embodiment, the movable contact units 400 are spaced apart from one another along the left-right direction.

[0118] exist Figures 4 to 8 In the illustrated embodiment, the movable contact portion 400 includes a movable cover 410 , a movable terminal 420 , a movable cable 430 , a movable contact base 440 , and a movable contact 450 .

[0119] The movable cover 410 is coupled to the other components of the movable contact unit 400. The movable cover 410 supports the other components of the movable contact unit 400. In the illustrated embodiment, the movable cover 410 supports the movable terminal 420, the movable cable 430, the movable contact base 440, and the movable contact 450.

[0120] The movable cover 410 can fixedly support the movable terminal 420. Furthermore, the movable cover 410 movably supports the movable cable 430, the movable contact base 440, and the movable contact 450. Therefore, in the event of an abnormal current flow, the movable terminal 420 can be fixed in position, while the movable cable 430, the movable contact base 440, and the movable contact 450 can rotate away from the fixed contact 320.

[0121] The movable cover 410 is coupled to the circuit breaker cover 100. In one embodiment, the movable cover 410 is movably coupled to the circuit breaker cover 100. Figure 4 In the illustrated embodiment, the upper rear side of the movable cover 410 may be rotatably coupled to the circuit breaker cover 100 .

[0122] In the illustrated embodiment, the movable cover 410 includes a main cover 411 , a supporting cover 412 , a rotating cover 413 , a supporting plate 414 , a rotating shaft 415 , an elastic member 416 , and a fastening member 417 .

[0123] The main cover 411 forms a part of the outer shape of the movable cover 410. In the illustrated embodiment, the main cover 411 forms a rear side portion of the movable cover 410.

[0124] The main housing 411 rotatably supports the movable cable 430 , the movable contact base 440 , and the movable contact 450 coupled to the movable contact base 440 . The main housing 411 accommodates the movable cable 430 and the movable contact base 440 .

[0125] The main housing 411 can be formed into a shape corresponding to the movable cable 430 and the movable contact stage 440. In the illustrated embodiment, the main housing 411 can be in the form of a three-dimensional figure having a width in the left-right direction and a height in the vertical direction. In this case, a plurality of small spaces are formed at the upper end of the main housing 411, with the front and upper sides open. These spaces each accommodate the plurality of movable cables 430 and the movable contact stage 440.

[0126] The main cover 411 is combined with the support cover 412 through the support plate 414 .

[0127] The support cover 412 is coupled to the movable terminal 420 and supports the movable terminal 420. In addition, the support cover 412 is rotatably coupled to the main cover 411.

[0128] Thus, the main cover 411 and the movable cable 430 and movable contact stage 440 coupled to the main cover 411 can rotate relative to the movable terminal 420 and the support cover 412 coupled to the movable terminal 420. In other words, when the movable terminal 420 is not moved, only the movable cable 430 and movable contact stage 440 can rotate.

[0129] The support cover 412 is located adjacent to one side of the main cover 411 that faces the movable terminal 420 , and in the illustrated embodiment, adjacent to the lower end.

[0130] The support cover 412 is coupled to the support plate 414. At this time, the support cover 412 is rotatably coupled to the support plate 414. Thus, the support cover 412 is rotatably coupled to the main cover 411 via the support plate 414.

[0131] The support cover 412 is coupled to the movable terminal 420. The support cover 412 is configured to surround the movable terminal 420. In the illustrated embodiment, the support cover 412 is configured to surround the rear side portion of the movable terminal 420 in the lower side and width direction (ie, left and right).

[0132] The rotating cover 413 rotatably supports the movable cable 430 and the movable contact base 440 . The movable cable 430 and the movable contact base 440 can be rotatably supported by the rotating cover 413 while being housed in the main cover 411 .

[0133] The rotating cover 413 is coupled to the main cover 411 . Specifically, the rotating cover 413 is coupled to a support plate 414 fixedly coupled to the main cover 411 .

[0134] The rotating cover 413 rotatably supports the movable contact base 440 . Thus, the movable cable 430 and the movable contact 450 coupled to the movable contact base 440 are also rotatably supported by the rotating cover 413 .

[0135] The rotating cover 413 is configured to surround a portion of the movable cable 430 and movable contact stage 440 housed in the main cover 411. In the illustrated embodiment, the rotating cover 413 is configured to surround the upper front side of the movable cable 430 and movable contact stage 440. In this case, the movable contact 450 can be configured so as not to be obscured by the rotating cover 413 and can be exposed outside the main cover 411.

[0136] The support plate 414 is fixedly coupled to the main housing 411 and surrounds a portion of the movable cable 430 and the movable contact stage 440 housed in the main housing 411. In the illustrated embodiment, the support plate 414 is configured to surround the movable cable 430 and the movable contact stage 440 in the width direction.

[0137] The support plate 414 is rotatably coupled to the support cover 412. The support plate 414 rotatably supports the support cover 412 and the movable terminal 420 coupled to the support cover 412. The movable terminal 420 can be fixedly coupled to the circuit breaker cover 100. In other words, the support plate 414 is rotatably coupled to the support cover 412.

[0138] In the illustrated embodiment, the protrusion is formed to protrude outwardly at a position adjacent to the lower end of the support plate 414. The protrusion can be rotatably inserted into an opening formed at the rear end of the support cover 412.

[0139] The support plate 414 is coupled to the rotating cover 413. The support plate 414 rotatably supports the movable cable 430 and the movable contact base 440 coupled to the rotating cover 413.

[0140] In the illustrated embodiment, a through hole is formed in the thickness direction (i.e., left-right direction) of the support plate 414 at a position slightly upward. This through hole can be matched with a through hole formed in the width direction of the rotating cover 413, for the fastening member 417 to penetrate and engage.

[0141] The support plates 414 may be provided in a plurality and may be fixedly coupled to each side of the main cover 411 in the width direction and may be coupled to each side of the support cover 412 and the rotating cover 413 respectively.

[0142] In the illustrated embodiment, the support plates 414 are provided as a pair, respectively coupled to the left and right edges of the main cover 411. In addition, the pair of support plates 414 are respectively coupled to the widthwise sides of the support cover 412 and the rotating cover 413.

[0143] The rotating shaft 415 rotatably supports the movable contact base 440. The movable contact base 440 and the movable cable 430 and the movable contact 450 coupled to the movable contact base 440 can rotate around the rotating shaft 415.

[0144] The rotating shaft 415 is coupled to the rotating cover 413. Specifically, the rotating shaft 415 penetrates and couples to a surface in the width direction of the rotating cover 413, that is, a through hole located on the front side of a pair of through holes formed on the left and right sides, respectively.

[0145] The rotating shaft 415 is coupled to the support plate 414 . Specifically, the rotating shaft 415 penetrates and is coupled to a through hole adjacent to a front side edge of the support plate 414 .

[0146] The rotating shaft 415 is coupled to the movable contact base 440. Specifically, the rotating shaft 415 is passed through and coupled to a through hole formed along the width direction of the movable contact base 440.

[0147] The rotating shaft 415 may have any shape that can rotatably couple the movable contact base 440 to the rotating cover 413 and the support plate 414. In the illustrated embodiment, the rotating shaft 415 has a cylindrical shape having a circular cross section and a length in the left-right direction.

[0148] As the rotating shaft 415 rotatably supports the movable contact base 440 , the movable contact base 440 and the movable contact 450 coupled to the movable contact base 440 can rotate even if the rotating cover 413 and the main cover 411 do not directly rotate.

[0149] Elastic member 416 applies elastic force to movable contact base 440. The elastic force applied by elastic member 416 presses movable contact base 440 toward fixed contact 320. As a result, movable contact 450 coupled to movable contact base 440 is also pressurized toward fixed contact 320.

[0150] Therefore, in a state where normal current flows, the contact reliability between the fixed contact 320 and the movable contact 450 can be ensured.

[0151] The elastic member 416 is housed inside the main cover 411. Specifically, the elastic member 416 is located adjacent to the upper end of the main cover 411, but is located inside the movable contact base 440 housed in the main cover 411, and in the illustrated embodiment, is located behind.

[0152] The elastic member 416 may be provided in any form capable of applying elastic force to the movable contact stage 440. In the illustrated embodiment, the elastic member 416 has a hollow interior and is provided in the form of a coil spring extending in the front-rear direction.

[0153] In the embodiment, one end portion of the elastic member 416 in the extending direction may elastically support the movable contact stage 440 , and the other end portion of the elastic member 416 in the extending direction may contact the main cover 411 .

[0154] A plurality of elastic members 416 may be provided. Each of the plurality of elastic members 416 can elastically support the plurality of movable contact stages 440. In the illustrated embodiment, the elastic members 416 are provided in five pairs, totaling ten. Each pair of elastic members 416 is spaced apart along the height direction of the main housing 411, and in the illustrated embodiment, spaced apart along the vertical direction.

[0155] That is, the pair of elastic members 416 can elastically support one movable contact stage 440 .

[0156] The fastening members 417 couple the various components of the movable cover 410. In one embodiment, the fastening members 417 can securely couple the various components of the movable cover 410. In the illustrated embodiment, the fastening members 417 couple the main cover 411, the rotating cover 413, and the support plate 414, respectively.

[0157] The fastening member 417 may be provided in any form that can connect the components of the movable cover 410. In the illustrated embodiment, the fastening member 417 is provided in the form of a screw member.

[0158] The fastening members 417 may be provided in a plurality. The plurality of fastening members 417 can connect the components of the movable cover 410 at different positions. In the illustrated embodiment, the fastening members 417 are provided in three pairs.

[0159] Refer again Figures 6 to 8 , showing a movable terminal 420 , a movable cable 430 , a movable contact base 440 , and a movable contact 450 provided in a movable contact portion 400 according to an embodiment of the present invention.

[0160] For ease of understanding, refer to Figure 6 In the coordinate system shown in , “upper side”, “lower side”, “left side”, “right side”, “front side” and “rear side” are further defined and explained.

[0161] The movable terminal 420 forms a component of the movable contact unit 400. A portion of the movable terminal 420 is housed within the housing space 110. In other words, a portion of the movable terminal 420 is exposed to the outside of the circuit breaker housing 100, while the remaining portion of the movable terminal 420 is housed within the housing space 110. In the illustrated embodiment, a portion of the front side of the movable terminal 420 is exposed to the outside.

[0162] The portion of the movable terminal 420, that is, the portion exposed to the outside of the circuit breaker cover 100, is electrically connected to an external power source or load. The connection can be made by a wire member (not shown) or a connector member (not shown).

[0163] The remaining portion of the movable terminal 420, i.e., the portion housed in the housing space 110, is coupled to the movable cable 430. The remaining portion of the movable terminal 420 is electrically connected to the movable cable 430. Specifically, the movable terminal 420 is electrically connected to the movable contact base 440 and the movable contact 450 via the movable cable 430.

[0164] The movable terminal 420 can have any shape that can be electrically connected to an external power source, a load, and the movable cable 430. In the illustrated embodiment, the movable terminal 420 is configured as a polygonal plate having a rectangular cross section and a thickness in the vertical direction.

[0165] The movable terminal 420 extends in one direction, in the illustrated embodiment, in the front-to-back direction. The front side of the movable terminal 420 is exposed outside the circuit breaker cover 100, and the rear side of the movable terminal 420 is accommodated in the cover space 110 and connected to the movable cable 430.

[0166] The movable terminal 420 can be combined with the movable cable 430 in any form. In one embodiment, after the movable cable 430 is inserted into the space formed by the movable terminal 420, an external force can be applied to the movable terminal 420 to combine the movable terminal 420 and the movable cable 430 by pressing.

[0167] At this point, the movable terminal 420 of the embodiment of the present invention can be easily coupled to the movable cable 430. Furthermore, the coupling of the movable terminal 420 and the movable cable 430 can be completed without a separate subsequent step. Furthermore, the coupled state of the movable terminal 420 and the movable cable 430 can be stably maintained.

[0168] To this end, in the illustrated embodiment, the movable terminal 420 includes a buffer space 421 and an insertion space 422 .

[0169] The buffer space 421 compensates for deformation of the movable terminal 420 during extrusion. Specifically, the buffer space 421 accommodates the portion of the movable terminal 420 that is deformed during extrusion. Thus, even during extrusion, the movable terminal 420 will not accidentally protrude outward or become excessively close to the movable cable 430.

[0170] The buffer space 421 is formed through the interior of the movable terminal 420. In the illustrated embodiment, the buffer space 421 is located toward the rear end of the movable terminal 420 and is spaced apart from the rear end of the movable terminal 420.

[0171] The buffer space 421 can accommodate the deformed portion of the movable terminal 420, thereby forming an arbitrary shape that can prevent the movable terminal 420 from deforming in any shape. In the illustrated embodiment, the buffer space 421 extends along the width direction of the movable terminal 420, that is, in the left-right direction, and penetrates along the thickness direction of the movable terminal 420, that is, in the up-down direction.

[0172] In this case, the ends of the buffer space 421 in the extension direction can be separated from the edges in the width direction of the movable terminal 420, that is, the left edge and the right edge. In other words, the front side, rear side, left side, and right side of the buffer space 421 are surrounded by the inner periphery of the movable terminal 420.

[0173] The buffer space 421 is communicated with the plurality of insertion spaces 422 .

[0174] The insertion space 422 accommodates the coupling end portion 431 of the movable cable 430. In this case, the insertion space 422 may be formed to have a larger cross-sectional area than the coupling end portion 431. Thus, the coupling end portion 431 can be easily accommodated in the insertion space 422 before extrusion molding.

[0175] The insertion space 422 is formed through the interior of the movable terminal 420. In the illustrated embodiment, the insertion space 422 is located toward the rear end of the movable terminal 420 and is spaced apart from the rear end of the movable terminal 420.

[0176] The insertion space 422 may be formed in a shape corresponding to the shape of the cross section of the coupling end portion 431. Figures 6 to 9 In the illustrated embodiment, the insertion space 422 is formed as a polygonal column-shaped space having a width in the left-right direction and a height in the front-back direction and penetrating in the up-down direction.

[0177] The insertion space 422 is connected to the buffer space 421. In other words, the insertion space 422 can be configured so that at least a portion overlaps with the buffer space 421. As the extrusion molding progresses, a surface of the movable terminal 420 surrounding the insertion space 422 (i.e., the rear inner surface in the illustrated embodiment) is extruded, and the deformed portion of the movable terminal 420 can flow into the buffer space 421.

[0178] Thus, even when the movable terminal 420 and the movable cable 430 are combined by extrusion molding, the shape deformation of the movable terminal 420 can be minimized. Thus, the movable terminal 420 and the movable cable 430 can be easily combined without requiring a separate subsequent process.

[0179] The insertion spaces 422 may be formed in a plurality. The plurality of insertion spaces 422 may be spaced apart from each other along the direction in which the buffer space 421 extends. In the illustrated embodiment, the plurality of insertion spaces 422 may be spaced apart from each other along the left-right direction. In this case, the plurality of insertion spaces 422 may be connected to the buffer space 421, respectively.

[0180] In the illustrated embodiment, five insertion spaces 422 are formed to accommodate the respective coupling ends 431 of the five movable cables 430. The number and arrangement of the insertion spaces 422 may be changed according to the number and arrangement of the coupling ends 431.

[0181] The movable cable 430 electrically connects the movable terminal 420 and the movable contact stage 440. The movable cable 430 is coupled to the movable terminal 420 and the movable contact stage 440, respectively.

[0182] The movable cable 430 may be formed of a flexible material. Alternatively, the movable cable 430 may be formed of a conductive material. In one embodiment, the movable cable 430 may be formed of copper (Cu) or an alloy material including copper.

[0183] The movable cable 430 can extend between the movable terminal 420 and the movable contact stage 440. In the illustrated embodiment, the movable cable 430 extends in the vertical direction. One end of the movable cable 430 (in the illustrated embodiment, the lower end) is coupled to the movable terminal 420. The other end of the movable cable 430 (in the illustrated embodiment, the upper end) is coupled to the movable contact stage 440.

[0184] The movable cables 430 may be provided in plural numbers. The plural movable cables 430 may be spaced apart from each other and may be respectively connected to the movable terminal 420 and the plural movable contact bases 440 .

[0185] In the illustrated embodiment, five movable cables 430 may be provided and respectively coupled to the movable terminal 420 and the five movable contact stages 440 and energized.

[0186] The one end portion of the movable cable 430 in the extending direction, that is, the end portion coupled to the movable terminal 420 is defined as a coupled end portion 431 .

[0187] The connecting end 431 is the portion that connects the movable cable 430 to the movable terminal 420. The connecting end 431 is inserted into and connected to the insertion space 422 of the movable terminal 420. As described above, the connecting end 431 can be formed to have a cross-section smaller than the cross-section of the insertion space 422. Thus, the connecting end 431 can be easily accommodated in the insertion space 422.

[0188] The process of combining the movable terminal 420 and the movable cable 430 will be described in detail later.

[0189] The movable contact base 440 is electrically connected to the movable terminal 420 via the movable cable 430. The movable contact base 440 is coupled to the movable cable 430. The movable contact base 440 is coupled to the movable contact 450 and electrically connected thereto. Thus, the movable terminal 420 and the movable contact 450 can be electrically connected.

[0190] The movable contact base 440 is coupled to the other end portion of the movable cable 430 in the extending direction, and in the illustrated embodiment, is coupled to the upper end portion. The movable contact base 440 is configured to cover the upper portion of the movable cable 430 from the outside.

[0191] The movable contact base 440 may have any shape that can be combined with the movable cable 430 and form the movable contact 450. In the illustrated embodiment, the movable contact base 440 is formed to extend in the vertical direction.

[0192] The movable contact base 440 is rotatably coupled to the rotating cover 413. A through-hole may be formed in the middle portion of the movable contact base 440 in the direction of its extension, through which the rotating shaft 415 may be inserted. The movable contact base 440 is rotatably supported by the rotating cover 413 via the rotating shaft 415. This allows the movable contact 450 to come into contact with or separate from the fixed contact 320.

[0193] The movable contact base 440 may be provided in plural numbers. The plural movable contact bases 440 may be spaced apart from each other and may be respectively coupled to the plural movable cables 430 and the plural movable contacts 450 .

[0194] In the illustrated embodiment, five movable contact stages 440 are provided and are respectively combined with five movable cables 430 and five movable contact stages 440 .

[0195] The movable contact 450 is coupled to the movable contact base 440 . The movable contact 450 is energized by an external power source or load through the movable cable 430 and the movable terminal 420 coupled to the movable contact base 440 and energized.

[0196] The movable contact 450 contacts or separates from the fixed contact 320 according to the rotation of the movable contact base 440. The movable contact 450 is energized via the fixed contact 320 and the fixed terminal 310 and an external power source or load connected to the fixed terminal 310.

[0197] The movable contact 450 is located adjacent to the arc extinguishing unit 200. When an abnormal current is generated, the arc generated between the fixed contact 320 and the movable contact 450 extends along the moving movable contact 450, moves to the arc extinguishing unit 200, and is extinguished. In the illustrated embodiment, the movable contact 450 is located below the arc extinguishing unit 200 and behind the fixed contact 320.

[0198] Reference Figure 9 , showing a process of combining the movable terminal 420 and the movable cable 430 of the movable contact portion 400 according to an embodiment of the present invention.

[0199] Reference Figure 9 (a), the coupling end portion 431 of the movable cable 430 is accommodated in the insertion space 422. In an embodiment in which a plurality of movable cables 430 and insertion spaces 422 are provided, the plurality of coupling end portions 431 are accommodated in the plurality of insertion spaces 422, respectively.

[0200] At this time, the insertion space 422 is formed to have a cross-sectional area larger than the coupling end portion 431. In the illustrated embodiment, the lengths of the insertion space 422 in the width direction and the height direction are formed to be longer than the width and height of the coupling end portion 431. Thus, the coupling end portion 431 can be easily accommodated in the insertion space 422.

[0201] When an external force is applied to the lower side of the movable terminal 420 while the coupling end 431 is accommodated in the insertion space 422, the movable terminal 420 deforms and the movable terminal 420 and the movable cable 430 are coupled. As a result, the buffer space 421 and the insertion space 422 are reduced, allowing the movable cable 430 to couple with the movable terminal 420.

[0202] Although not shown, the movable terminal 420 may be supported in the width direction, i.e., on the left and right sides, by a mold or the like. Thus, due to the external force applied to the rear side of the movable terminal 420, the shape deformation of the movable terminal 420 can be limited to the front side or the inner side in the width direction, rather than the outer side in the width direction.

[0203] Reference Figure 9 (b) shows a state where the movable terminal 420 is deformed in shape due to an applied external force, and the coupling end portion 431 accommodated in the insertion space 422 is squeezed.

[0204] As described above, the width direction of the movable terminal 420 can be supported by the mold. Therefore, due to the external force applied to the rear side of the movable terminal 420, the upper side portion of the movable terminal 420 can be deformed toward the front side and the inner side in the width direction, and can be squeezed and coupled with the coupling end portion 431 accommodated in the insertion space 422.

[0205] Therefore, the movable terminal 420 and the movable cable 430 can be easily coupled simply by applying an external force. Furthermore, the movable terminal 420 and the movable cable 430 can be squeezed together without requiring a separate subsequent process, allowing them to maintain a stable coupled state. Furthermore, unexpected shape deformation of the movable terminal 420 can be prevented.

[0206] Reference Figures 10 and 11 , showing a process of combining the movable terminal 420 and the movable cable 430 of the movable contact portion 400 according to another embodiment of the present invention.

[0207] exist Figure 10 In the embodiment shown, the insertion space 422 and the coupling end portion 431 are formed to have a circular cross section. Figure 11 In the illustrated embodiment, the insertion space 422 and the coupling end portion 431 are formed to have a rectangular cross-section.

[0208] In the illustrated embodiment, the insertion space 422 is formed to have the same shape as the coupling end portion 431. Figure 10 In the embodiment shown, the insertion space 422 is formed to have a circular cross section corresponding to the shape of the coupling end portion 431. Figure 11 In the illustrated embodiment, the insertion space 422 is formed to have a rectangular cross-section corresponding to the shape of the coupling end portion 431 .

[0209] That is, in the illustrated embodiment, the movable terminal 420 is provided with the insertion space 422, but no separate buffer space 421 is formed. Therefore, if an external force is applied to the movable terminal 420, the movable terminal 420 may deform the shape of a portion of the coupling end 431 and couple with the movable cable 430.

[0210] As an alternative, the buffer space 421 may be provided to allow the movable terminal 420 and the movable cable 430 to be coupled without deforming the shape of the coupling end portion 431 .

[0211] That is, even if the end portion of the movable terminal 420 in the extending direction, i.e., the upper end portion, is not open in the embodiment of the present invention, it can still be easily and reliably connected to the movable cable 430. In addition, it is possible to prevent the movable terminal 420 from unexpected shape deformation, thereby eliminating the need for subsequent steps and simplifying the manufacturing process.

[0212] At this time, the external force applied to the lower end of the movable terminal 420 can be applied to a position corresponding to the position of the coupling end 431. Figure 10 (b) and Figure 10 As shown in (b), external force may be applied to five points perpendicular to the bottom of the coupling end portion 431 .

[0213] Due to the applied external force, the lower end portion of the movable terminal 420 may be deformed forward, and thus the plurality of coupling ends 431 are deformed forward and coupled to the movable terminal 420 .

[0214] Although the embodiments of the present invention have been described, the technical ideas of the present invention are not limited to the embodiments described in this specification. Those skilled in the art who understand the technical ideas of the present invention can easily propose other implementation plans within the scope of the same idea by adding, modifying, deleting or supplementing constituent elements, and these modified plans should also be regarded as belonging to the scope of protection of the present invention.

[0215] 10: Circuit breaker 100: Circuit breaker cover

[0216] 110: Cover space 200: Arc extinguishing part

[0217] 300: Fixed contact part 310: Fixed terminal

[0218] 320: Fixed contact 400: Movable contact

[0219] 410: movable cover 411: main cover

[0220] 412: Support cover 413: Rotating cover

[0221] 414: Support plate 415: Rotation axis

[0222] 416: Elastic member 417: Fastening member

[0223] 420: Movable terminal 421: Buffer space

[0224] 422: Insertion space 430: Movable cable

[0225] 431: Joint end 440: Movable contact base

[0226] 450: Movable contact

Claims

1. A movable contact portion, wherein: include: A movable terminal, electrically connected to an external power source or load; a movable cable, coupled to the movable terminal and energized, and extending outward from the movable terminal; as well as a movable contact platform, coupled to the movable cable and powered, and configured to be rotatable; The movable terminal comprises: an insertion space formed through the interior of the movable terminal and accommodating the movable cable; as well as a buffer space formed through the interior of the movable terminal and communicating with the insertion space, and located between the insertion space and one end portion of the movable terminal in the longitudinal direction; When an external force is applied to the movable terminal, the one end portion of the movable terminal is pressed toward the insertion space, thereby reducing the buffer space.

2. The movable contact portion according to claim 1, wherein The movable cable includes a coupling end portion that forms one end portion in the extending direction of the movable cable and is inserted and coupled to the insertion space.

3. The movable contact portion according to claim 2, wherein: The cross-sectional area of ​​the insertion space is formed to be larger than the cross-sectional area of ​​the coupling end portion.

4. The movable contact portion according to claim 1, wherein The insertion space extends along a length direction of the movable terminal, and the buffer space extends along a width direction of the movable terminal.

5. The movable contact portion according to claim 1, wherein The extending length of the movable terminal in one direction is formed to be longer than the extending length in the other direction; The insertion spaces are formed in a plurality, and the plurality of insertion spaces are spaced apart from each other along the other direction; The buffer space is formed by extending along the other direction and is communicated with the plurality of insertion spaces respectively.

6. The movable contact portion according to claim 5, wherein The insertion space and the buffer space are located toward the one end portion of the movable terminal in the one direction.

7. The movable contact portion according to claim 6, wherein: The external force is applied to the one end portion of the movable connecting terminal, so that the movable connecting terminal and the movable cable are extruded and combined.

8. The movable contact portion according to claim 1, wherein The buffer space is formed longer in the width direction of the movable terminal; The insertion space is formed to be longer along the length direction of the movable terminal at a position adjacent to one end portion of the buffer space.

9. The movable contact portion according to claim 1, wherein It includes a movable cover body respectively combined with the movable terminal and the movable contact platform.

10. The movable contact portion according to claim 9, wherein The movable cover comprises: a main cover body, movably accommodating the movable contact stage; a support plate, coupled to the main cover and configured to surround the movable terminal and a portion of the movable contact stage; and The rotating cover is combined with the supporting plate and rotatably supports the movable contact stage.

11. The movable contact portion according to claim 10, wherein The movable cover includes a rotating shaft penetrating and coupled to the movable contact stage and the rotating cover.

12. A circuit breaker, wherein: include: A circuit breaker cover having a cover space formed therein; a fixed contact portion, a portion of which is accommodated in the cover space and fixedly coupled to the circuit breaker cover; as well as a movable contact portion, a portion of which is accommodated in the cover space and is located adjacent to the fixed contact portion and is movably coupled to the circuit breaker cover; The fixed contact portion includes: a fixed terminal, exposed to the outside of the housing space and electrically connected to either an external power source or a load; and a fixed contact, housed in the housing space and coupled to the fixed terminal and energized; The movable contact portion includes: a movable terminal, exposed to the outside of the cover space and electrically connected to the other of an external power source and a load; a movable cable, housed in the cover space and coupled to the movable terminal and energized; and a movable contact platform, housed in the cover space and coupled to the movable cable and energized; The movable terminal comprises: an insertion space formed through the interior of the movable terminal and accommodating the movable cable; and a buffer space formed through the interior of the movable terminal and communicating with the insertion space; If an external force is applied to the movable connecting terminal, the cross-sectional area of ​​the insertion space is reduced, so that the movable connecting terminal and the movable cable are extruded and combined.

13. The circuit breaker according to claim 12, wherein: The insertion space and the buffer space are located at positions biased toward one end portion of the end portion of the movable terminal that is accommodated in the cover space.

14. The circuit breaker according to claim 12, wherein: Before the external force is applied, the cross-sectional area of ​​the insertion space is formed to be larger than the cross-sectional area of ​​one end portion of the movable cable accommodated in the insertion space.

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