Mover assembly

Abstract

A mover assembly is disclosed. The mover assembly according to one aspect of the present invention may comprise: a main frame rotatably coupled to a circuit breaker; a main puffer coupled to the main frame and configured to surround a portion of the main frame; and a sub puffer movably coupled to the main puffer and configured to surround the space between a fixed contact provided in the circuit breaker and the portion of the main frame.

Description

Operator assembly

[0001] The present invention relates to a movable assembly, and more specifically, to a movable assembly having a structure capable of preventing pressure loss when an arc occurs.

[0002] A circuit breaker is installed in a power system and connected to the power source and the load, respectively, to enable current flow. If an abnormal current occurs between the power source and the load, the circuit breaker performs a tripping operation to interrupt the current flow between them. As a result, the power source and the load can be protected from damage caused by the abnormal current.

[0003] Typically, a circuit breaker includes a fixed contact that is fixedly installed and a movable contact that is movably provided. The movable contact is provided to be movable in a direction toward the fixed contact or in a direction opposite to the fixed contact. When the movable contact is in contact with the fixed contact, the power source and the load can be energized to each other. In the event of an abnormal current, the movable contact separates from the fixed contact, and the energization of the power source and the load is released.

[0004] Even at the moment when the movable contact and the fixed contact separate, the current—specifically the abnormal current—continues to flow through them. Therefore, when the movable contact and the fixed contact separate, the energy of the current being conducted is converted into a flow of electrons at high temperature and high pressure. This converted flow of electrons is called an arc.

[0005] As mentioned above, an arc is a flow of electrons at high temperature and high pressure. Therefore, if the arc remains inside the circuit breaker instead of being discharged to the outside, there is a risk that other components of the breaker may be damaged by the heat or pressure of the arc. Accordingly, a process is required to discharge the generated arc to the outside while reducing its temperature and pressure; this is called the arc extinguishing process.

[0006] Meanwhile, if the pressure generated along with the arc is insufficient, there is a risk that the force of the arc moving toward the arc extinguishing device will decrease. In this case, the arc may be maintained for an excessively long time, and there is a risk that other components of the circuit breaker may be damaged.

[0007] Accordingly, a method is required to maintain the pressure in the space where the movable and fixed contacts, which are the parts where arcs occur inside the circuit breaker, are located.

[0008] Korean Registered Patent Document No. 10-1621138 discloses a circuit breaker for a gas-insulated switchgear with improved breaking performance. Specifically, it discloses a puffer-type circuit breaker that includes a separate conductor and an internal conductor tube, and improves the cooling and discharge performance of hot gas through a diffusion hole penetrating the internal conductor tube.

[0009] However, the Puffer-type circuit breaker disclosed in the aforementioned prior art provides a method for stagnating the hot gas by increasing the contact length between the hot gas and the metal conductor through a modification of the structure of the internal conductor tube. In other words, the aforementioned prior art does not provide a method for preventing pressure drop by trapping the hot gas itself.

[0010] Korean Registered Patent Document No. 10-2208932 discloses a shielding member for changing the direction of fine particles and pressure for an electric circuit breaker. Specifically, it discloses a shielding member for a circuit breaker capable of changing the direction of fine particle fragments and air pressure through a shielding member comprising first to fifth segments.

[0011] However, the shielding member disclosed in the aforementioned prior art is provided as a single member formed of a rigid body. The prior art does not provide a method for varying the size of the space that the shielding member can shield depending on the occurrence conditions of an arc, etc.

[0012] Korean Registered Patent Document No. 10-1621138 (May 9, 2016)

[0013] Korean Registered Patent Document No. 10-2208932 (January 22, 2021)

[0014] The present invention is intended to solve the above-mentioned problems, and the objective of the present invention is to provide a movable assembly with a structure capable of preventing pressure loss.

[0015] Another objective of the present invention is to provide a movable assembly with a structure capable of varying the size of the space to prevent pressure loss.

[0016] Another objective of the present invention is to provide a actuator assembly with a structure capable of preventing pressure loss in a sufficiently sized space even when the actuator is moved.

[0017] Another objective of the present invention is to provide a movable assembly with a structure that can reduce the size of the space occupied when the movable is not moved.

[0018] Another objective of the present invention is to provide a movable assembly with a structure in which the expansion and reduction of its volume can be easily and simply performed.

[0019] The problems of the present invention are not limited to those mentioned above, and other unmentioned problems will be clearly understood by a person skilled in the art to which the present invention pertains from the description below.

[0020] According to one aspect of the present invention, a movable assembly is provided, comprising: a main frame rotatably coupled to a circuit breaker; a main puffer coupled to the main frame and configured to surround a portion of the main frame; and a sub puffer movably coupled to the main puffer and configured to surround the space between a fixed contact provided in the circuit breaker and the portion of the main frame.

[0021] At this time, the above-mentioned subpuffer may be provided with a movable assembly comprising: a sub-wing portion that partially surrounds the space; and a sub-plate that is continuous with the sub-wing portion and surrounds the above-mentioned portion of the main frame on one side in the height direction.

[0022] Additionally, the above subplate is formed to have a length in a first direction and a width in a second direction, and the subwing portion may be provided with a movable assembly in which the end in the second direction is continuous with the end in the first direction of the subplate.

[0023] At this time, the main puffer may be provided with a main plate that surrounds the part of the main frame and the sub-plate on one side in the height direction, and the sub-plate may be provided with a movable assembly that is seated on the main plate and supported so as to be movable.

[0024] Additionally, a movable assembly may be provided, wherein the main plate is formed to have a length in the first direction and a width in the second direction, and the main puffer is continuous with each end of the second direction of the main plate and includes a limiting plate that supports the sub-wing portion on the outside of the part of the main frame along the first direction.

[0025] At this time, the sub-puffer includes a support projection formed protruding from the inner surface of the sub-wing portion, and the main puffer includes an elastic member coupling portion that movably accommodates the support projection; and an elastic member that is accommodated in the elastic member coupling portion and configured to elastically support the support projection, thereby providing a movable assembly.

[0026] Additionally, the above elastic member coupling part may be provided with a movable assembly comprising: a receiving space for receiving the support projection and the elastic member; and a support edge that closes one side in the longitudinal direction of the receiving space and supports one end of the elastic member.

[0027] At this time, a movable assembly may be provided in which the sub-puffer includes a guide projection formed protruding from the inner surface of the sub-wing portion, and the main puffer includes a guide groove formed through the direction of the protrusion of the guide projection and extended to have a length in the direction toward the sub-puffer to movably accommodate the guide projection.

[0028] In addition, a movable assembly may be provided in which the guide groove is formed to have a predetermined inclination with respect to the horizontal direction.

[0029] At this time, the above main puffer may be provided with a movable assembly comprising a main wing portion that surrounds the space from the outside and whose outer side is partially surrounded by the sub-wing portion.

[0030] Additionally, the main puffer may be provided with a movable assembly comprising a coupling projection that is formed protruding from the inner surface of the main wing portion and inserted and coupled into a puffer coupling opening provided in the main frame.

[0031] At this time, a movable assembly may be provided, wherein the main puffer is formed through the main wing portion and is arranged to overlap with a frame through hole provided in the main frame, and includes a main puffer through hole through which an external bar member passes.

[0032] Additionally, the main frame may be provided with a frame body having a length in a first direction and coupled to the main puffer; a movable member located inside the frame body along the first direction; and a movable contact protruding toward the fixed contact from the surface of the movable member, and the main puffer may be provided with a movable member assembly that surrounds the frame body, the movable member, and the movable contact from the outside in the first direction.

[0033] According to the above configuration, the movable assembly according to an embodiment of the present invention can prevent the loss of pressure.

[0034] In addition, according to the above configuration, the movable assembly according to the embodiment of the present invention can vary the size of the space capable of preventing pressure loss.

[0035] In addition, according to the above configuration, the actuator assembly according to the embodiment of the present invention can prevent pressure loss in a sufficiently large space even when the actuator is moved.

[0036] In addition, according to the above configuration, the size of the space occupied by the movable assembly according to the embodiment of the present invention when the movable is not moved can be reduced.

[0037] In addition, according to the above configuration, the movable assembly according to the embodiment of the present invention can easily and simply expand and reduce its volume.

[0038] The effects of the present invention are not limited to the effects described above, and should be understood to include all effects that can be inferred from the configuration of the invention described in the detailed description or claims of the present invention.

[0039] FIG. 1 is a perspective view illustrating a movable frame according to an embodiment of the present invention.

[0040] Figure 2 is an exploded perspective view illustrating the configuration of the movable frame of Figure 1.

[0041] FIG. 3 is a perspective view illustrating a main frame provided in the movable frame of FIG. 1.

[0042] Fig. 4 is a side view illustrating the main frame of Fig. 3.

[0043] Figure 5 is a partial enlarged view illustrating the main frame of Figure 3.

[0044] FIGS. 6 and FIGS. 7 are perspective views illustrating a main puffer provided in the movable frame of FIG. 1.

[0045] Fig. 8 is a side view illustrating the main puffer of Figs. 6 and 7.

[0046] FIGS. 9 and FIGS. 10 are perspective views illustrating a sub-puffer provided on the movable frame of FIG. 1.

[0047] FIG. 11 is a perspective view illustrating a state in which a main puffer and a sub-puffer are operated to a first state according to an embodiment of the present invention.

[0048] FIG. 12 is an AA perspective cross-sectional view illustrating a state in which a main puffer and a sub-puffer are operated to a first state according to an embodiment of the present invention.

[0049] FIG. 13 is a perspective view illustrating a state in which a movable assembly according to an embodiment of the present invention is operated in a first state.

[0050] FIG. 14 is a side view illustrating a state in which a movable assembly according to an embodiment of the present invention is operated in a first state.

[0051] FIG. 15 is a perspective view illustrating a state in which the main puffer and sub-puffer are operated to a second state according to an embodiment of the present invention.

[0052] FIG. 16 is a BB perspective cross-sectional view illustrating a state in which the main puffer and sub-puffer are operated to a second state according to an embodiment of the present invention.

[0053] FIG. 17 is a perspective view illustrating a state in which a movable assembly according to an embodiment of the present invention is operated to a second state.

[0054] FIG. 18 is a side view illustrating a state in which a movable assembly according to an embodiment of the present invention is operated to a second state.

[0055] Hereinafter, embodiments of the present invention are described in detail with reference to the attached drawings so that those skilled in the art can easily implement the present invention. The present invention may be embodied in various different forms and is not limited to the embodiments described herein. To clearly explain the present invention, parts unrelated to the description in the drawings have been omitted, and the same reference numerals have been used throughout the specification for identical or similar components.

[0056] The words and terms used in this specification and claims are not limited to their ordinary or dictionary meanings, but should be interpreted in a meaning and concept consistent with the technical spirit of the invention in accordance with the principles by which the inventor defines terms and concepts to best describe his invention.

[0057] Therefore, the embodiments described in this specification and the configurations illustrated in the drawings correspond to preferred embodiments of the present invention and do not represent all technical ideas of the present invention; thus, various equivalents and modifications that may replace such configurations may exist at the time of filing the present invention.

[0058] In the following description, descriptions of some components may be omitted to clarify the features of the present invention.

[0059]

[0060] In the following description, the term "connection" refers to one or more members being connected to each other in a manner that allows for fluid communication. In one embodiment, the connection may be formed by members such as a conduit, a pipe, or a piping system. In the following description, the term "connection" may be used interchangeably with the meaning that one or more members are "fluidly connected" to each other.

[0061] In the following description, the term "conduction" means that one or more components are connected to each other to transmit current or electrical signals. In one embodiment, the conduction may be formed in a wired form by a conductor member, etc., or in a wireless form such as Bluetooth, Wi-Fi, or RFID. In one embodiment, the conduction may include the meaning of "communication."

[0062] As used in the following description, the term "fluid" refers to any form of substance that flows due to an external force and whose shape or volume, etc., can be deformed. In one embodiment, the fluid may be a liquid such as water or a gas such as air.

[0063] The terms "upper side," "lower side," "left side," "right side," "front side," and "rear side" used in the following description shall be understood by referring to the coordinate system depicted throughout the attached drawings.

[0064]

[0065] Referring to FIGS. 1 and 2, a movable assembly (10) according to an embodiment of the present invention is illustrated as an example. The movable assembly (10) according to an embodiment of the present invention can be provided in and utilized by a circuit breaker. At this time, the movable assembly (10) is provided in the circuit breaker so as to be movable, and can be moved in a direction toward a fixed contact (not shown) and in a direction opposite thereto.

[0066] When the movable assembly (10) is in contact with a fixed contact (not shown) and is energized by an external power source and load, and the movable assembly (10) is moved and separated from the fixed contact (not shown), pressure may be generated along with an arc.

[0067] At this time, if pressure is leaked by chance, it is difficult to form sufficient pressure for the generated arc to move toward the arc extinguishing device. Accordingly, the movable assembly (10) according to an embodiment of the present invention may be configured to include a main puffer (200) and a sub puffer (300) surrounding a movable contact (130) that is in contact with and separated from a fixed contact (not shown).

[0068] At this time, the main puffer (200) and the sub-puffer (300) can be movably coupled to each other. Accordingly, the relative lengths of the main puffer (200) and the sub-puffer (300) can be changed depending on the position of the movable contact (130). Accordingly, the volume of the space enclosed by the main puffer (200) and the sub-puffer (300) can also be changed.

[0069] Therefore, the generated pressure loss is minimized, and the arc extinguishing performance of the generated arc can be improved. A detailed explanation of the above process will be provided later.

[0070] In the embodiment illustrated in FIGS. 1 and 2, the movable assembly (10) includes a main frame (100), a main puffer (200), and a sub-puffer (300). At this time, the main frame (100) may be fixedly coupled to the main puffer (200). Additionally, the sub-puffer (300) may be movably coupled to the main puffer (200).

[0071] The main frame (100) forms the outer shape of the movable assembly (10). The main frame (100) is the part to which the movable assembly (10) is movably coupled to the circuit breaker. Additionally, the main frame (100) is coupled to other components of the movable assembly (10). Specifically, the main frame (100) is coupled to the main puffer (200) and is coupled to the sub-puffer (300) through the main puffer (200). As described above, the sub-puffer (300) is movably coupled to the main puffer (200), and the main puffer (200) can be fixedly coupled to the main frame (100).

[0072] The main frame (100) extends in the height direction of the movable assembly (10), in the vertical direction in the illustrated embodiment. One side of the main frame (100) in the height direction, the upper part in the illustrated embodiment, is coupled to the main puffer (200). The other side of the main frame (100) in the height direction, the lower part in the illustrated embodiment, is rotatably coupled to the circuit breaker.

[0073] At this time, the main frame (100) can be rotated in a direction toward a fixed contact (not shown) provided in the circuit breaker and in a direction opposite thereto (not shown). In the illustrated embodiment, the main frame (100) can be rotated toward the left or right with the other side in the height direction as the central axis.

[0074] In the embodiment illustrated in FIGS. 3 to 5, the main frame (100) includes a frame body (110), a movable member (120), a movable contact (130), a puffer coupling opening (140), a frame through hole (150), and a main puffer receiving space (160).

[0075] The frame body (110) constitutes the body of the main frame (100). The frame body (110) may be combined with or formed with other components of the main frame (100). In the illustrated embodiment, the frame body (110) is combined with and supports the movable member (120). A puffer coupling opening (140), a frame through hole (150), and a main puffer receiving space (160) may be formed in the frame body (110).

[0076] The frame body (110) is a part to which the main frame (100) is movably coupled to the circuit breaker. In the illustrated embodiment, the frame body (110) extends in the height direction, i.e., the vertical direction, of the movable assembly (10), and a part adjacent to its lower end can be rotatably coupled to the circuit breaker.

[0077] On one side in the height direction of the frame body (110), in the illustrated embodiment, the upper side, a puffer coupling opening (140), a frame through hole (150), and a main puffer receiving space (160) are formed. On one side in the length direction of the frame body (110), in the illustrated embodiment, the front side, a movable member (120) and a movable contact (130) are located. The frame body (110) can support the movable member (120) and the movable contact (130) coupled thereto.

[0078] The frame body (110) may be any shape that constitutes the outer shape of the main frame (100) and can be combined with or formed with other components of the main frame (100). In the illustrated embodiment, the frame body (110) is a three-dimensional shape having a height in the vertical direction, a length in the front-back direction, and a width in the left-right direction.

[0079] The actuator (120) mediates the connection between the frame body (110) and the movable contact (130). The actuator (120) is connected to the frame body (110) and the movable contact (130), respectively. The actuator (120) is formed of a conductive material and can be electrically connected to the movable contact (130).

[0080] The actuator (120) may extend in the height direction of the frame body (110), in the vertical direction in the illustrated embodiment. A movable contact (130) is coupled to one side of the corner of the actuator (120), in the illustrated embodiment, the front side. The other side of the corner of the actuator (120), in the illustrated embodiment, the rear side, is at least partially accommodated inside the frame body (110).

[0081] Multiple movable members (120) may be provided. Multiple movable members (120) may be spaced apart along the width direction of the frame body (110) and each may be connected to a plurality of movable contacts (130) to be energized. In the illustrated embodiment, five movable members (120) are provided and spaced apart from each other in the left-right direction.

[0082] The movable contact (130) is configured such that the movable assembly (10) contacts a fixed contact (not shown) provided in a circuit breaker to conduct electricity. The movable contact (130) is located on the front side in the illustrated embodiment, in a direction facing the fixed contact (not shown). The movable contact (130) may be formed to protrude through the front side in the illustrated embodiment, in a direction facing the fixed contact (not shown).

[0083] The movable contact (130) is coupled to and supported by the actuator (120). The movable contact (130) is energized by the actuator (120). The movable contact (130) can be energized by being connected to an external power source (not shown) or load (not shown) through the actuator (120).

[0084] Multiple movable contacts (130) may be provided. Each of the multiple movable contacts (130) is coupled to a plurality of movable members (120) and may be electrically connected to each of the multiple fixed contacts (not shown). In the illustrated embodiment, a total of five movable contacts (130) are provided, identical to the movable members (120).

[0085] The puffer coupling opening (140) constitutes a part where the main frame (100) is coupled with the main puffer (200). The puffer coupling opening (140) is formed as a recess on the outer circumference of the frame body (110) to accommodate a coupling projection (270) provided on the main puffer (200).

[0086] The puffer coupling opening (140) is located adjacent to the frame through hole (150). In the illustrated embodiment, the puffer coupling opening (140) is located in a portion adjacent to the upper end of the frame body (110). Additionally, the puffer coupling opening (140) is located on the rear side of the movable member (120) and can be coupled with the rear side of the main puffer (200) located on the front side of the movable member (120).

[0087] The puffer coupling opening (140) may have a shape corresponding to the shape of the coupling projection (270). In the illustrated embodiment, the puffer coupling opening (140) is formed as a cylindrical space having a circular cross-section and a depth in the left-right direction.

[0088] Multiple puffer coupling openings (140) may be formed. Multiple puffer coupling openings (140) may accommodate multiple coupling protrusions (270) at different locations. In the illustrated embodiment, the puffer coupling openings (140) are formed on each side in the width direction of the frame body (110), respectively, on the left and right sides in the illustrated embodiment. A frame through hole (150) is located adjacent to the puffer coupling opening (140).

[0089] The frame through hole (150) constitutes another part where the main frame (100) is joined to the main puffer (200). The frame through hole (150) is formed through the outer circumference of the frame body (110) and is positioned to overlap with the main puffer through hole (260) provided in the main puffer (200). A bar for joining them can be joined through the frame through hole (150) and the main puffer through hole (260) that overlaps with it.

[0090] The frame through hole (150) is located adjacent to the puffer coupling opening (140). In the illustrated embodiment, the frame through hole (150) is located above the puffer coupling opening (140). The relative positions of the frame through hole (150) and the puffer coupling opening (140) can be changed to correspond to the relative positions of the coupling projection (270) and the main puffer through hole (260).

[0091] The frame through hole (150) may have a shape corresponding to the shape of the connecting projection (270). In the illustrated embodiment, the frame through hole (150) is formed as a disc-shaped space having a circular cross-section and a thickness in the left-right direction.

[0092] Multiple frame through holes (150) may be formed. Multiple frame through holes (150) are arranged to overlap with multiple main puffer through holes (260) at different locations, and the bar (not shown) may be joined through them. In the illustrated embodiment, the frame through holes (150) are formed on each side in the width direction of the frame body (110), specifically on the upper portions of the left and right sides in the illustrated embodiment.

[0093] The main puffer receiving space (160) partially accommodates the main puffer (200). The main puffer receiving space (160) may be formed at a position corresponding to the location of the main wing portion (212) of the main puffer (200).

[0094] In the illustrated embodiment, the main puffer receiving space (160) is located adjacent to one side in the height direction of the frame body (110), namely the upper end. The main puffer receiving space (160) is located between the movable contact (130) and the puffer coupling opening (140) (or frame through hole (150)).

[0095] The main puffer receiving space (160) is formed by being recessed into a part of the outer circumference of the frame body (110). The main puffer receiving space (160) may have a shape corresponding to the shape of the main wing portion (212).

[0096] In the illustrated embodiment, the main puffer receiving space (160) is formed as a polygonal plate-shaped space having a polygonal cross-section in which the height decreases as it goes from the front to the rear and a depth in the left-right direction.

[0097] At this time, one side in the longitudinal direction of the main puffer receiving space (160), the front side in the illustrated embodiment, is formed open so that the main wing portion (212) can be easily received.

[0098] Multiple main puffer receiving spaces (160) may be formed. Multiple main puffer receiving spaces (160) may at least partially accommodate the main wing portion (212) at different locations.

[0099] In the illustrated embodiment, a pair of main puffer receiving spaces (160) are formed. The pair of main puffer receiving spaces (160) are formed in the width direction of the frame body (110), on the left side and the right side in the illustrated embodiment, respectively.

[0100] Referring to FIGS. 6 to 8, the movable assembly (10) according to an embodiment of the present invention includes a main puffer (200).

[0101] The main puffer (200) movably supports the sub-puffer (300). The main puffer (200) is coupled to the main frame (100). Therefore, it can be said that the main puffer (200) mediates the coupling between the main frame (100) and the sub-puffer (300). The main puffer (200) is located between the main frame (100) and the sub-puffer (300).

[0102] The main puffer (200) is at least partially surrounded by the sub-puffer (300). In the illustrated embodiment, a portion of the front side and a portion of the upper side of the main puffer (200) may be surrounded by the sub-puffer (300).

[0103] The main puffer (200) is positioned adjacent to the movable contact (130). The main puffer (200) is configured to prevent leakage of arc and pressure generated at the movable contact (130) by at least partially surrounding the movable contact (130). That is, the main puffer (200) can perform the role of preventing leakage of generated pressure.

[0104] To this end, the main puffer (200) is configured to surround the movable contact (130) on each side in the width direction and on one side in the height direction, i.e., on the left, right, and bottom sides in the illustrated embodiment.

[0105] At this time, the other side in the height direction of the main puffer (200), the upper side in the illustrated embodiment, is formed open. An arc extinguishing mechanism (not shown) may be located on the upper side of the main puffer (200). Accordingly, the arc and pressure generated at the movable contact (130) surrounded by the main puffer (200) can be discharged only to the arc extinguishing mechanism (not shown) through the open upper side.

[0106] Accordingly, the main puffer (200) can improve the arc extinguishing performance of the generated arc.

[0107] The main puffer (200) may be formed of an electrically insulating material. This is to prevent unintended current flow between the movable member (120) or the movable contact (130) and the fixed contact (not shown) located adjacent thereto.

[0108] Additionally, the main puffer (200) may be formed of a thermal insulating material. This is to prevent damage caused by an arc generated at the movable contact (130).

[0109] Furthermore, the main puffer (200) can be formed from a high-rigidity material. This is to prevent damage caused by the arc and the pressure generated along with it.

[0110] In one embodiment, the main puffer (200) may be formed of a reinforced plastic material.

[0111] In the illustrated embodiment, the main puffer (200) includes a main puffer body (210), a main plate (220), a guide groove (230), a limiting plate (250), a main puffer through hole (260), a coupling projection (270), a buffer space (280), and an elastic member (290).

[0112] The main puffer body (210) forms the outer shape of the main puffer (200). The main puffer body (210) can prevent any leakage of pressure by at least partially surrounding the movable contact (130). In the illustrated embodiment, the main puffer body (210) surrounds the movable contact (130) on each side in the width direction, on the left and right sides in the illustrated embodiment, respectively.

[0113] Other components of the main puffer (200) may be combined or formed in the main puffer body (210). In the illustrated embodiment, a main plate (220), a limiting plate (250), a coupling projection (270), and an elastic member (290) are combined in the main puffer body (210). Additionally, a guide groove (230), an elastic member coupling portion (240), a main puffer through hole (260), and a buffer space (280) are formed in the main puffer body (210).

[0114] The main puffer body (210) is coupled to the main plate (220). In the illustrated embodiment, one side of the main puffer body (210), namely the upper front side, is coupled to the main plate (220). The main puffer body (210) can support the main plate (220).

[0115] A guide groove (230) is formed through one side in the height direction of the main puffer body (210), in the illustrated embodiment, on the upper side. An elastic member coupling portion (240) is formed on the outer side in the width direction of the main puffer body (210), on the left and right sides in the illustrated embodiment. An elastic member (290) is received in the elastic member coupling portion (240).

[0116] The main puffer body (210) is coupled with a limiting plate (250). The limiting plate (250) is continuous on one side in the height direction of the main puffer body (210), in the illustrated embodiment, on the upper side. The main puffer body (210) is positioned to face the limiting plate (250) with the elastic member coupling portion (240) in between.

[0117] A main puffer through hole (260) is formed in the main puffer body (210). In the illustrated embodiment, the main puffer through hole (260) is formed through the upper rear side of the main puffer body (210). A coupling projection (270) is formed protruding from the inner side of the main puffer body (210). A buffer space (280) is formed recessed on one side of the main puffer body (210), in the illustrated embodiment, on the front side.

[0118] The main puffer body (210) can support the sub-wing portion (310). In the illustrated embodiment, the main puffer body (210) supports a portion of the sub-wing portion (310) from below.

[0119] The main puffer body (210) may be any shape that constitutes the outer shape of the main puffer (200) and to which other components of the main puffer (200) can be combined or formed. In the illustrated embodiment, the main puffer body (210) is a three-dimensional shape having a length in the front-rear direction, a width in the left-right direction, and a height in the up-down direction.

[0120] At this time, one side in the longitudinal direction of the main puffer body (210), the rear side in the illustrated embodiment, is formed open so that the main frame (100) can be at least partially accommodated.

[0121] In the illustrated embodiment, the main puffer body (210) includes a main extension (211) and a main wing (212).

[0122] The main extension (211) constitutes a part of the main puffer body (210). The main extension (211) constitutes one side in the longitudinal direction of the main puffer body (210), the front side in the illustrated embodiment. The main extension (211) is configured to close the lower front side of the main frame (100) coupled with the main puffer (200).

[0123] The main extension (211) may be any shape that can form the front side of the main puffer body (210). In the illustrated embodiment, the main extension (211) is formed as a polygonal plate shape having a length in the left-right direction longer than the height in the up-down direction and a thickness in the front-back direction.

[0124] The main extension (211) is continuous with the main wing (212). Each side of the main extension (211) in the longitudinal direction, the left end and the right end in the illustrated embodiment, is continuous with the main wing (212).

[0125] The main extension (211) is continuous with the main plate (220). One side of the main extension (211) in the height direction, the upper end in the illustrated embodiment, supports the main plate (220).

[0126] The main wing portion (212) constitutes another part of the main puffer body (210). The main wing portion (212) constitutes each side in the width direction of the main puffer body (210), the left and right sides in the illustrated embodiment. The main wing portion (212) is configured to surround the left and right sides of the main frame (100) combined with the main puffer (200).

[0127] Therefore, it will be understood that the main wing portion (212) can prevent leakage of pressure through the width direction by surrounding the movable contact (130) along the width direction of the main puffer (200).

[0128] A plurality of main wing sections (212) may be provided. Each of the plurality of main wing sections (212) is connected to the main extension section (211) and can surround the movable contact (130) at different locations. In the illustrated embodiment, a pair of main wing sections (212) are provided and spaced apart in the left and right directions. The pair of main wing sections (212) are arranged facing each other with the space formed between them and the main frame (100) accommodated therein in between.

[0129] A guide groove (230), an elastic member coupling part (240), a main puffer through hole (260), and a coupling projection (270) are formed in the main wing portion (212). Additionally, the main wing portion (212) is continuous with the limiting plate (250).

[0130] The main wing portion (212) may have any shape that can prevent pressure leakage by forming the main puffer body (210) together with the main extension portion (211) and surrounding the movable contact (130) on each side in the width direction. In the illustrated embodiment, the main wing portion (212) is formed as a plate shape having a length in the front-rear direction longer than the height in the up-down direction and a thickness in the left-right direction.

[0131] The main plate (220) is a component that movably supports the sub-puffer (300). The main plate (220) supports the sub-plate (320) provided on the sub-puffer (300) from below, thereby enabling the sub-puffer (300) to move stably while combined with the main puffer (200).

[0132] Additionally, the main plate (220) surrounds the movable contact (130) from the lower side. The main plate (220) is configured to prevent arc and pressure generated at the movable contact (130) from leaking through the lower side.

[0133] The main plate (220) is combined with the main puffer body (210). The main plate (220) is continuous with one side in the height direction of the main extension (211), the upper side in the illustrated embodiment. Additionally, each side in the width direction of the main plate (220), the left and right sides in the illustrated embodiment, are each continuous with the main wing (212).

[0134] The main plate (220) is continuous with the limiting plate (250). One side of the main plate (220) in the height direction, the upper side in the illustrated embodiment, is continuous with the limiting plate (250). The main plate (220) is located between the main extension (211) and the limiting plate (250).

[0135] The main plate (220) may have any shape that prevents pressure leakage by surrounding the lower side of the movable contact (130) and supports the movement of the sub-plate (320). In the illustrated embodiment, the main plate (220) is formed as a plate shape having a width in the left-right direction that is longer than the length in the front-back direction and a height in the up-down direction.

[0136] At this time, the main plate (220) may be extended at an angle toward the lower front side. Accordingly, the sub-plate (320) supported by the main plate (220) may be moved at an angle toward the main puffer (200) or in the opposite direction.

[0137] The main plate (220) surrounds the elastic member joint (240) at least partially. In the illustrated embodiment, the main plate (220) may surround the elastic member joint (240) and the elastic member (290) accommodated therein on one side in the height direction, i.e., the upper side.

[0138] The guide groove (230) is a configuration in which the main puffer (200) is combined with the sub-puffer (300). A guide projection (330) is movably received in the guide groove (230). The sub-puffer (300) can be moved toward the front or rear side while the guide projection (330) is received in the guide groove (230).

[0139] The guide groove (230) is formed in a part of the main wing portion (212). In the illustrated embodiment, the guide groove (230) is formed on one side in the height direction of the main wing portion (212), that is, in a part adjacent to the upper end.

[0140] The guide groove (230) may have a shape corresponding to the direction of movement of the sub-puffer (300). Additionally, the guide groove (230) may have a shape corresponding to the shape of the guide projection (330). In the illustrated embodiment, the guide groove (230) is formed as a space having a length in the front-rear direction and a height in the up-down direction, and a thickness in the left-right direction.

[0141] At this time, the guide groove (230) may be extended at an angle along its length direction. That is, as best illustrated in FIG. 8, the guide groove (230) may be extended at an angle toward the lower front side. In one embodiment, the guide groove (230) may be extended at an angle in the same direction as the main plate (220).

[0142] Accordingly, it will be understood that the sub-puffer (300) combined with the main puffer (200) can also be moved toward the lower side of the front or the lower side of the rear.

[0143] A plurality of guide grooves (230) may be formed. A plurality of guide grooves (230) may each movably accommodate a plurality of guide projections (330) at different positions. In the illustrated embodiment, a pair of guide grooves (230) are formed in each of a pair of main wing portions (212). A pair of guide projections (330) are each movably accommodated in the pair of guide grooves (230).

[0144] The elastic member coupling portion (240) accommodates the elastic member (290) in a shape-deformable manner. The elastic member (290) is shaped-deformed while coupled to the elastic member coupling portion (240), stores a restoring force, and can provide the stored restoring force to the sub-puffer (300).

[0145] An elastic member connecting portion (240) is formed on the main wing portion (212). The elastic member connecting portion (240) may be formed on the outer side in the thickness direction of the main wing portion (212). Multiple elastic member connecting portions (240) may be formed. Multiple elastic member connecting portions (240) may each be formed on multiple main wing portions (212).

[0146] In the illustrated embodiment, a pair of elastic member coupling portions (240) are formed and are formed on each of the pair of main wing portions (212). At this time, the elastic member coupling portion (240) formed on the left side is formed on the front side of the left side of the main wing portion (212), and the elastic member coupling portion (240) formed on the right side is formed on the front side of the right side of the main wing portion (212).

[0147] In the illustrated embodiment, the elastic member joint (240) includes a receiving space (241) and a supporting edge (242).

[0148] The receiving space (241) is a space that accommodates the elastic member (290). A support projection (340) is movably accommodated in the receiving space (241). The receiving space (241) can be defined by being at least partially enclosed by the main puffer body (210) and the main plate (220). In the illustrated embodiment, one side in the height direction of the receiving space (241), i.e., the upper side, is enclosed by the main plate (220). The other side in the height direction of the receiving space (241), the lower side in the illustrated embodiment, is enclosed by the main wing portion (212).

[0149] One side of the lengthwise direction of the receiving space (241), the front side in the illustrated embodiment, is formed open so that the support projection (340) can be received. The other side of the lengthwise direction of the receiving space (241), the rear side in the illustrated embodiment, is closed by the support edge (242).

[0150] The receiving space (241) may be of any shape capable of accommodating the elastic member (290) in a shape-deformable manner. In the illustrated embodiment, the receiving space (241) is formed as a groove having a length in the front-rear direction, a height in the up-down direction, and a depth in the left-right direction.

[0151] At this time, the receiving space (241) may be formed to correspond to the shape of the main plate (220) or the guide groove (230). In the illustrated embodiment, the receiving space (241) is extended at an angle toward the lower front and the upper rear.

[0152] The other side in the longitudinal direction of the receiving space (241), i.e., the rear side, is closed by a support corner (242).

[0153] The support edge (242) supports one side in the longitudinal direction of the elastic member (290), the rear side in the illustrated embodiment. The support edge (242) surrounds the receiving space (241) that accommodates the elastic member (290) on said side, i.e., the rear side. The support edge (242) is continuous with the main wing portion (212) and the main plate (220), respectively.

[0154] The limiting plate (250) surrounds the movable contact (130) in the width direction together with the main wing portion (212). The limiting plate (250) is configured to prevent any leakage of arc and pressure generated at the movable contact (130) together with the main wing portion (212).

[0155] Additionally, the limiting plate (250) surrounds one side in the longitudinal direction of the guide groove (230), the front side in the illustrated embodiment. The limiting plate (250) can limit the distance that the guide projection (330) coupled to the guide groove (230) moves toward the front side.

[0156] Furthermore, the limiting plate (250) supports the sub-wing portion (310) of the sub-puffer (300) combined with the main puffer (200) from the inner side in the width direction. Accordingly, the sub-puffer (300) combined with the main puffer (200) can move only in its length direction, that is, the front-back direction, without swaying in the width direction, i.e., the left-right direction.

[0157] The limiting plate (250) is continuous with the main plate (220). The limiting plate (250) is continuous with one side in the thickness direction of the main plate (220), the upper side in the illustrated embodiment.

[0158] The limiting plate (250) may have any shape that forms the front end of the guide groove (230) and supports the sub-wing portion (310) in the width direction. In the illustrated embodiment, the limiting plate (250) is formed as a plate having a polygonal cross-section and a thickness in the left-right direction.

[0159] A plurality of limiting plates (250) may be provided. A plurality of limiting plates (250) may surround the movable contact (130) at different locations and support the guide projection (330).

[0160] In the illustrated embodiment, a pair of limiting plates (250) are provided and are connected to the left and right ends of the main plate (220), respectively. Each limiting plate (250) surrounds the movable contact (130) in the left and right directions and can support the guide projection (330) in the inner side in the left and right directions, respectively.

[0161] The main puffer through hole (260) is a configuration in which the main puffer (200) is combined with the main frame (100). The main puffer through hole (260) is formed through the interior of the main wing portion (212). The main puffer through hole (260) can be positioned to overlap with the frame through hole (150) of the main frame (100). The bar (not shown) can be combined through the main puffer through hole (260).

[0162] By the above combination, the main puffer (200) and the main frame (100) can be combined.

[0163] The main puffer through hole (260) may have a shape corresponding to the frame through hole (150) or the shape of the bar (not shown). In the illustrated embodiment, the main puffer through hole (260) is formed as a disc-shaped space having a circular cross-section and a thickness in the left-right direction.

[0164] The main puffer through hole (260) may be formed in the main wing portion (212). The main puffer through hole (260) may be formed through one side in the longitudinal direction of the main wing portion (212), in the illustrated embodiment, in a portion adjacent to the rear side end.

[0165] Multiple main puffer through holes (260) may be formed. Multiple main puffer through holes (260) are formed in each of the multiple main wing portions (212) and are arranged to overlap with each of the multiple frame through holes (150) so that the bar (not shown) can pass through.

[0166] In the illustrated embodiment, a pair of main puffer through holes (260) are formed and are formed through each of the pair of main wing portions (212). The main puffer through holes (260) are arranged to overlap with the frame through holes (150) of the main frame (100) accommodated in the space between the pair of main wing portions (212), and the bar (not shown) can be joined through them.

[0167] The coupling projection (270) is another configuration in which the main puffer (200) is coupled to the main frame (100). The coupling projection (270) is inserted and coupled into the puffer coupling opening (140) formed in the main frame (100). The coupling projection (270) may be positioned to overlap the puffer coupling opening (140).

[0168] A connecting projection (270) is formed on the main wing portion (212). The connecting projection (270) may be formed protruding from the inner surface in the thickness direction of the main wing portion (212). The connecting projection (270) is located adjacent to one side in the longitudinal direction of the main wing portion (212), in the illustrated embodiment, at the rear end.

[0169] The coupling projection (270) may be of any shape that can be inserted into the puffer coupling opening (140). In the illustrated embodiment, the coupling projection (270) is formed as a disc-shaped projection having a circular cross-section and a thickness in the left-right direction.

[0170] At this time, the end surface of the coupling projection (270) may be formed to have a different shape along the front-rear direction. That is, as shown in FIGS. 6 and 7, the front side surface of the coupling projection (270) may be flat, while the rear side surface of the coupling projection (270) may be extended in an inclined manner toward the outside.

[0171] Accordingly, the coupling projection (270) can be moved from the front side to the rear side and easily inserted into the puffer coupling opening (140), while preventing it from moving out toward the front side.

[0172] Multiple coupling protrusions (270) may be formed. Multiple coupling protrusions (270) may each be formed on multiple main wing portions (212) and each may be inserted and coupled to multiple puffer coupling openings (140).

[0173] In the illustrated embodiment, a pair of coupling protrusions (270) are formed. The pair of coupling protrusions (270) each protrude from the inner surface of a pair of main wing portions (212) and are each inserted and coupled into a pair of puffer coupling openings (140).

[0174] Accordingly, the main puffer (200) can be combined with the main frame (100) at multiple locations. Accordingly, the combined state of the main puffer (200) and the main frame (100) can be stably maintained.

[0175] The buffer space (280) is configured to facilitate the smooth movement of the sub-puffer (300). As the buffer space (280) is formed, the sub-puffer (300) can move smoothly toward the front or rear side without interference from the main puffer body (210).

[0176] A buffer space (280) is formed in the main puffer body (210). The buffer space (280) is formed by a recess on the front side in the illustrated embodiment, where the main extension (211) and the main wing (212) are continuous. Multiple buffer spaces (280) may be formed. Multiple buffer spaces (280) may each be formed at different locations.

[0177] In the illustrated embodiment, a pair of buffer spaces (280) are formed. The pair of buffer spaces (280) are formed by being recessed at each side end in the width direction of the main extension (211), in the illustrated embodiment, at the front and rear sides, respectively. At this time, a portion of each pair of buffer spaces (280) may also be formed by being recessed on the outer surface of the pair of main wing portions (212).

[0178] The buffer space (280) may be of any shape capable of facilitating smooth movement of the sub-puffer (300). In the illustrated embodiment, the buffer space (280) is formed as a polygonal plate-shaped groove having a polygonal cross-section and a depth in the left-right direction.

[0179] The elastic member (290) is configured such that the main puffer (200) is combined with the sub puffer (300). The elastic member (290) is configured to elastically support a support projection (340) provided on the sub puffer (300). At this time, the elastic force applied by the elastic member (290) to the support projection (340) may be in the forward direction, that is, in a direction away from the main puffer (200).

[0180] When the movable contact (130) comes into contact with the fixed contact and the subplate (320) comes into contact with another component of the circuit breaker, the elastic member (290) is compressed by the sub-puffer (300) and can store elastic force. Additionally, when the movable contact (130) is separated from the fixed contact and the subplate (320) is separated from another component of the circuit breaker, the sub-puffer (300) can be moved forward by the elastic force provided by the elastic member (290).

[0181] Therefore, it will be understood that the sub-puffer (300) can be folded into the main puffer (200) or unfolded from the main puffer (200) depending on the movement of the actuator assembly (10).

[0182] The elastic member (290) is coupled with the elastic member coupling portion (240). Specifically, the elastic member (290) is received in the receiving space (241), and one side in the longitudinal direction, the rear side in the illustrated embodiment, is supported by the support edge (242). The other side in the longitudinal direction of the elastic member (290), the front side in the illustrated embodiment, can be elastically supported by contacting the support projection (340).

[0183] The elastic member (290) may be provided in any shape capable of elastically supporting the sub-puffer (300). In the illustrated embodiment, the elastic member (290) is provided in the form of a coil spring having a length in the front-rear direction and a hollow formed inside.

[0184] A plurality of elastic members (290) may be provided. A plurality of elastic members (290) are each connected to a plurality of elastic member connecting parts (240) and can each elastically support a plurality of support protrusions (340). In the illustrated embodiment, a pair of elastic members (290) is provided. A pair of elastic members (290) are each connected to a pair of elastic member connecting parts (240) and elastically support a pair of support protrusions (340).

[0185] Referring to FIGS. 9 and 10, the movable assembly (10) according to an embodiment of the present invention includes a sub-puffer (300).

[0186] The sub-puffer (300) is configured to prevent leakage of arc and pressure generated at the movable contact (130) together with the main puffer (200). The sub-puffer (300) is movably coupled to the main puffer (200).

[0187] When the sub-puffer (300) moves toward the main puffer (200), the sub-puffer (300) and the main puffer (200) are positioned to overlap and surround the same space. When the sub-puffer (300) moves in the opposite direction relative to the main puffer (200), the sub-puffer (300) and the main puffer (200) can each surround different spaces.

[0188] In other words, the sub-puffer (300) can be said to perform the role of expanding the space to prevent pressure leakage.

[0189] The sub-puffer (300) is positioned adjacent to the movable contact (130). The sub-puffer (300) is configured to prevent leakage of arc and pressure generated at the movable contact (130) by at least partially surrounding the movable contact (130). That is, the sub-puffer (300) can perform the role of preventing leakage of generated pressure.

[0190] To this end, the sub-puffer (300) is configured to surround the movable contact (130) on each side in the width direction and on one side in the height direction, i.e., on the left, right, and bottom sides in the illustrated embodiment.

[0191] At this time, the other side in the height direction of the sub-puffer (300), the upper side in the illustrated embodiment, is also formed open. An arc extinguishing mechanism (not shown) may be located on the upper side of the sub-puffer (300). Accordingly, the arc and pressure generated at the movable contact (130) surrounded by the sub-puffer (300) can be discharged only to the arc extinguishing mechanism (not shown) through the open upper side.

[0192] Accordingly, the sub-puffer (300) can contribute to improving the arc extinguishing performance of the generated arc.

[0193] The sub-puffer (300) may be formed of an electrically insulating material. This is to prevent accidental current flow between the movable member (120) or the movable contact (130) and the fixed contact (not shown) located adjacent thereto. The sub-puffer (300) may be formed of a thermally insulating material. This is to prevent damage caused by an arc generated at the movable contact (130).

[0194] Furthermore, the subpuffer (300) can be formed from a high-rigidity material. This is to prevent damage caused by pressure generated along with arc and heat.

[0195] In one embodiment, the sub-puffer (300) may be formed of a reinforced plastic material. In the above embodiment, the sub-puffer (300) and the main puffer (200) may be formed of the same material.

[0196] In the illustrated embodiment, the sub-puffer (300) includes a sub-wing portion (310), a sub-plate (320), a guide projection (330), and a support projection (340).

[0197] The sub-wing portion (310) forms part of the outer shape of the sub-puffer (300). The sub-wing portion (310) forms each side in the width direction of the sub-puffer (300), the left and right sides in the illustrated embodiment. The sub-wing portion (310) is configured to surround the left and right sides of the movable contact (130) provided on the main frame (100).

[0198] Accordingly, it will be understood that the sub-wing portion (310) can prevent leakage of pressure through the width direction by surrounding the movable contact (130) along the width direction of the sub-puffer (300).

[0199] The sub-wing portion (310) can be supported by the main wing portion (212). That is, the sub-wing portion (310) is located on one side of the main wing portion (212) in the longitudinal and height directions, i.e., on the upper side in the front, and can be supported by the main wing portion (212).

[0200] The sub-wing portion (310) can surround the guide groove (230) and the limiting plate (250), which are located on the upper side of the main wing portion (212), on the outer side in the width direction of the sub-puffer (300), i.e., the left and right sides. The sub-wing portion (310) can be supported by the outer surface of the limiting plate (250).

[0201] As the sub-wing portion (310) is supported by the main wing portion (212), the sub-puffer (300) combined with the main puffer (200) may not sway along its width direction.

[0202] The sub-wing portion (310) is continuous with the sub-plate (320). The sub-wing portion (310) can surround the movable contact (130) together with the sub-plate (320). In the illustrated embodiment, one side in the longitudinal direction of the sub-wing portion (310), the front side in the illustrated embodiment, is continuous with the sub-plate (320).

[0203] Guide projections (330) and support projections (340) may be formed on the sub-wing portion (310). On the inner surface of the surface of the sub-wing portion (310), guide projections (330) and support projections (340) may be formed protruding apart from each other. The sub-wing portion (310) may be movably coupled to the main puffer (200) by means of guide projections (330) and support projections (340).

[0204] The sub-wing portion (310) may have any shape that can be combined with the sub-plate (320), guide projection (330), and support projection (340) to move together and supported by the main wing portion (212). In the illustrated embodiment, the sub-wing portion (310) is formed as a plate shape having a length in the front-rear direction longer than the height in the up-down direction and a thickness in the left-right direction.

[0205] A plurality of sub-wing sections (310) may be provided. A plurality of sub-wing sections (310) may be each coupled to a sub-plate (320), a guide projection (330), and a support projection (340) at different locations and may move together. In the illustrated embodiment, a pair of sub-wing sections (310) are provided and spaced apart in the left-right direction.

[0206] At this time, the sub-wing portion (310) located on the left can be supported by the upper front end of the main wing portion (212) located on the left or by the left side of the limiting plate (250). Additionally, the sub-wing portion (310) located on the right can be supported by the upper front end of the main wing portion (212) located on the right or by the right side of the limiting plate (250).

[0207] The subplate (320) is movably seated on the main plate (220). The subplate (320) can be moved together with other components of the sub-puffer (300), namely the sub-wing portion (310), guide projection (330), and support projection (340), while being supported by the main plate (220). Accordingly, the sub-puffer (300) can be moved stably along its length direction, in the illustrated embodiment, the front-rear direction, without oscillating along its height direction.

[0208] The subplate (320) surrounds the movable contact (130) from the lower side. The subplate (320) is configured to prevent arc and pressure generated at the movable contact (130) from leaking through the lower side.

[0209] The subplate (320) is combined with the subwing portion (310). The subplate (320) has sides in its width direction, the left and right ends in the illustrated embodiment, which are continuous with the front ends of the subwing portion (310).

[0210] The sub-plate (320) can be of any shape that prevents pressure leakage by surrounding the lower side of the movable contact (130) and can be movably supported by the main plate (220). In the illustrated embodiment, the sub-plate (320) is formed as a plate shape having a width in the left-right direction that is longer than the length in the front-back direction and a height in the up-down direction.

[0211] At this time, the sub-plate (320) may be extended at an angle toward the lower front side. As described above, the main plate (220) may also be extended at an angle toward the lower front side. Accordingly, the sub-plate (320) is maintained while being supported by the main plate (220) and may be moved toward the main puffer (200) or in the opposite direction.

[0212] In one embodiment, the subplate (320) may be extended to have the same slope as the main plate (220).

[0213] With the movable contact (130) in contact with the fixed contact (not shown), the front end of the subplate (320) may be maintained in contact with another component of the circuit breaker. In this state, the subplate (320) may be pressed by the other component so that the sub-puffer (300) may move toward the main puffer (200).

[0214] Additionally, when the movable contact (130) is separated from the fixed contact (not shown), the subplate (320) can be moved in the opposite direction to the main puffer (200) by an elastic member (290) that elastically supports the sub puffer (300).

[0215] Accordingly, the size of the space surrounded by the main puffer (200) and sub puffer (300) to prevent pressure leakage can be varied. A detailed description of the above process will be provided later.

[0216] The guide projection (330) is a configuration in which the sub-puffer (300) is combined with the main puffer (200). The guide projection (330) is movably received in the guide groove (230). The guide projection (330) can be supported by the inner circumference of the main wing portion (212) surrounding the guide groove (230).

[0217] The guide projection (330) is coupled with the sub-wing portion (310). The guide projection (330) can be positioned at any location where it can be movably coupled with the guide groove (230). In the illustrated embodiment, the guide projection (330) is located on one side in the longitudinal direction of the sub-wing portion (310), at the rear end in the illustrated embodiment.

[0218] The guide projection (330) is formed to protrude from the inner surface in the thickness direction of the sub-wing portion (310). In an embodiment where a pair of sub-wing portions (310) are provided and spaced apart in the left and right directions, a pair of guide projections (330) may also be provided.

[0219] One guide projection (330) may be located on the right side of the sub-wing portion (310) located on the left, and the other guide projection (330) may be located on the left side of the sub-wing portion (310) located on the right.

[0220] The guide projection (330) may be of any shape that can be movably received in the guide groove (230). In the illustrated embodiment, the guide projection (330) is formed as a polygonal prism-shaped projection having a polygonal cross-section and a height in the left-right direction.

[0221] In the illustrated embodiment, it is assumed that the main puffer (200) and the sub-puffer (300) are slidably coupled by a guide groove (230) and a guide projection (330). That is, the guide projection (330) is movably inserted into the guide groove (230) which is formed to extend in a forward and backward direction, so that the main puffer (200) can be slidably coupled with the sub-puffer (300).

[0222] The main puffer (200) and the sub-puffer (300) can be combined in any form that allows them to slide relative to each other. For example, a slide rail may be formed on either the main puffer (200) or the sub-puffer (300), and another rail that is coupled to the rail may be formed on the other. In the above embodiment, each slide rail may extend in the same direction relative to each other.

[0223] The support projection (340) is another configuration in which the sub-puffer (300) is coupled with the main puffer (200). The support projection (340) is coupled with the elastic member coupling portion (240). Specifically, the support projection (340) is movably received in the receiving space (241) and is elastically supported by the elastic member (290). As described above, the support projection (340) can come into contact with one end in the longitudinal direction of the elastic member (290) while received in the receiving space (241).

[0224] The support projection (340) is coupled with the sub-wing portion (310). The support projection (340) can be movably received in the receiving space (241) and can be placed at any position where it can be elastically supported by an elastic member (290). In the illustrated embodiment, the support projection (340) is located on one side in the height direction of the sub-wing portion (310), at the lower end in the illustrated embodiment. At this time, the support projection (340) can be located adjacent to the sub-plate (320).

[0225] The support projection (340) is formed to protrude from the inner surface in the thickness direction of the sub-wing portion (310). In an embodiment where a pair of sub-wing portions (310) are provided and spaced apart in the left and right directions, a pair of support projections (340) may also be provided. One of the support projections (340) may be located on the right side of the sub-wing portion (310) located on the left, and the other support projection (340) may be located on the left side of the sub-wing portion (310) located on the right.

[0226] At this time, the support projection (340) can be positioned closer to the subplate (320) than the guide projection (330), that is, on the front side.

[0227] The support projection (340) may be of any shape that can be movably received in the receiving space (241) and elastically supported by the elastic member (290). In the illustrated embodiment, the support projection (340) is formed as a polygonal prism-shaped projection having a polygonal cross-section and a height in the left-right direction.

[0228]

[0229] Referring to FIGS. 11 to 18, the relative positional relationship between the main puffer (200) and the sub puffer (300) according to the position of the movable assembly (10) according to an embodiment of the present invention is illustrated as an example.

[0230] In the following description, the first position (P1) can be defined as a state in which the sub-puffer (300) is moved toward the main puffer (200) and folded, and the second position (P2) can be defined as a state in which the sub-puffer (300) is moved opposite to the main puffer (200) and unfolded.

[0231] Referring to FIGS. 11 to 14, an example is shown of a state in which a movable assembly (10) according to an embodiment of the present invention is operated to a first position (first position (P1)).

[0232] In the first position (P1), the movable contact (130) is in contact with a fixed contact (not shown) provided in the circuit breaker and remains energized. The main frame (100) is rotated toward the fixed contact (not shown), and the front end of the subplate (320) provided in the sub-puffer (300) is pressed by another component (not shown) provided in the circuit breaker.

[0233] Accordingly, the sub-puffer (300) is moved to the rear side along the main plate (220), guide groove (230), and receiving space (241), and the elastic member (290) is pressed by the support projection (340) and maintained in a compressed state.

[0234] In the above state, the main puffer (200) and the sub-puffer (300) can be positioned to surround the movable contact (130) at the same location. The main puffer (200) and the sub-puffer (300) can prevent pressure leakage in the same space.

[0235] In other words, since no arc is generated in the first position (P1), it will be understood that the size of the space required to prevent arc or pressure leakage is not very large.

[0236] Referring to FIGS. 15 to 18, an example is shown of a state in which a movable assembly (10) according to an embodiment of the present invention is operated to a second position (P2).

[0237] In the second position (P2), the movable contact (130) is spaced apart from the fixed contact (not shown) provided in the circuit breaker. The movable assembly (10) is rotated opposite to the fixed contact (not shown) so that the front end of the subplate (320) provided in the sub-puffer (300) is spaced apart from another component (not shown) provided in the circuit breaker.

[0238] Accordingly, the sub-puffer (300) is moved forward along the main plate (220), guide groove (230), and receiving space (241) by the elastic force provided by the elastic member (290).

[0239] In the above state, the main puffer (200) and the sub puffer (300) may be positioned to surround the movable contact (130) at different locations. Specifically, the main frame (100) is maintained in a state combined with the main puffer (200), so that the main puffer (200) may surround the left, right, and lower sides of the movable contact (130).

[0240] Additionally, the sub-puffer (300) is moved forward from the main puffer (200) and can surround the left, right, and lower sides of the space between the fixed contact (not shown) and the movable contact (130).

[0241] Accordingly, even when the movable assembly (10) is rotated so that the movable contact (130) is separated from the fixed contact (not shown), the volume of the space that can prevent pressure leakage can be increased as the sub-puffer (300) unfolds.

[0242] As a result, leakage of the arc and the pressure generated along with it can be effectively prevented, thereby improving the arc extinguishing capability.

[0243]

[0244] Although embodiments of the present invention have been described, the spirit of the present invention is not limited to the embodiments presented in this specification. Those skilled in the art who understand the spirit of the present invention may easily propose other embodiments within the scope of the same spirit by adding, changing, deleting, or adding components, and such embodiments shall also be considered to fall within the scope of the spirit of the present invention.

[0245] 10: Operator Assembly 100: Main Frame

[0246] 110: Frame body 120: Motion unit

[0247] 130: Movable contact 140: Puffer coupling opening

[0248] 150: Frame penetration hole 160: Main puffer accommodation space

[0249] 200: Main Puffer 210: Main Puffer Body

[0250] 211: Main Extension Section 212: Main Wing Section

[0251] 220: Main plate 230: Guide groove

[0252] 240: Elastic member joint 241: Receiving space

[0253] 242: Support corner 250: Limit plate

[0254] 260: Main puffer through hole 270: Connecting protrusion

[0255] 280: Buffer space 290: Elastic member

[0256] 300: Sub Puffer 310: Sub Wing

[0257] 320: Subplate 330: Guide projection

[0258] 340: Support projection P1: First position

[0259] P2: 2nd position

[0260]

Claims

1. A main frame rotatably coupled to a circuit breaker; A main puffer coupled to the main frame and configured to surround a part of the main frame; and A sub-puffer movably coupled to the main puffer and configured to surround the space between the fixed contact provided in the circuit breaker and the part of the main frame, Operator assembly.

2. In Paragraph 1, The above sub-puffer is, A sub-wing portion partially surrounding the above space; and A subplate that is continuous with the sub-wing portion and surrounds the portion of the main frame on one side in the height direction, Operator assembly.

3. In Paragraph 2, The above subplate is formed to have a length in a first direction and a width in a second direction, and The above sub-wing section is, The end of the second direction is continuous with the end of the first direction of the subplate, Operator assembly.

4. In Paragraph 3, The above main puffer is, It includes a main plate that surrounds the above part of the main frame and the subplate on one side in the height direction, The above subplate is movably supported by being seated on the above main plate, Operator assembly.

5. In Paragraph 4, The above main plate is formed to have a length in the first direction and a width in the second direction, and The above main puffer is, A limiting plate that is continuous with each end of the second direction of the main plate and supports the sub-wing portion on the outer side of the part of the main frame along the first direction, Operator assembly.

6. In Paragraph 2, The above sub-puffer is, It includes a support projection formed protruding from the inner surface of the above-mentioned sub-wing portion, and The above main puffer is, An elastic member coupling portion that movably accommodates the above-mentioned support projection; and A elastic member comprising an elastic member that is received in the elastic member coupling portion and configured to elastically support the support projection, Operator assembly.

7. In Paragraph 6, The above elastic member coupling part is, A receiving space for accommodating the support projection and the elastic member; and A supporting edge that closes one side in the longitudinal direction of the above receiving space and supports one end of the elastic member, Operator assembly.

8. In Paragraph 2, The above sub-puffer is, It includes a guide projection formed protruding from the inner surface of the above-mentioned sub-wing portion, and The above main puffer is, A guide groove formed through the protruding direction of the guide projection and extended to have a length in the direction toward the sub-puffer to movably accommodate the guide projection, Operator assembly.

9. In Paragraph 8, The above guide groove is formed to have a predetermined inclination with respect to the horizontal direction, Operator assembly.

10. In Paragraph 2, The above main puffer is, A main wing portion that surrounds the above space from the outside and whose outer side is partially surrounded by the sub-wing portion, Operator assembly.

11. In Paragraph 10, The above main puffer is, A coupling projection formed protruding from the inner surface of the main wing portion and inserted and coupled into a puffer coupling opening provided in the main frame, Operator assembly.

12. In Paragraph 11, The above main puffer is, A main puffer through hole formed through the main wing portion and arranged to overlap with a frame through hole provided in the main frame, through which an external bar member passes, Operator assembly.

13. In Paragraph 1, The above main frame is, A frame body combined with the above-mentioned main puffer and having a length in a first direction; A movable member located inside the frame body along the first direction; and It includes a movable contact protruding toward the fixed contact from the surface of the above-mentioned movable member, and The above main puffer is, The above frame body, the above movable member, and the above movable contact surrounding the outside of the first direction, Operator assembly.

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