Circuit breaker for wiring

Abstract

The invention discloses a circuit breaker for wiring. The circuit breaker for wiring prevents the case from being damaged by high-temperature and high-voltage arcs. A circuit breaker for wiring according to an embodiment of the present invention includes a housing, a plurality of base assemblies, and a tightening member. The plurality of base assemblies are accommodated in the housing. The tightening member is disposed between the housing and the base assembly. In addition, the base assembly has a base cover. The base cover has a space formed therein to accommodate the fixed contact, the movable contact, and the arc extinguishing portion. A tightening member accommodating portion for accommodating the tightening member is formed in the base cover.

Description

Technical Field

[0001] This invention relates to circuit breakers for wiring. Background Technology

[0002] A wiring circuit breaker (MCCB: Molded Case Circuit Breaker) is a type of circuit breaker designed to disconnect energized electrical equipment in the event of abnormal currents such as leakage or overcurrent to prevent electrical accidents.

[0003] A typical wiring circuit breaker internally includes fixed contacts and movable contacts. During the flow of a normal current (not an abnormal current), the fixed contacts and movable contacts are in contact with each other, thus enabling energization. Furthermore, if an abnormal current occurs, the fixed contacts and movable contacts separate, thereby disconnecting the energizer.

[0004] When the fixed and movable contacts separate, an electric arc is generated due to the abnormal current flowing between them. After an arc extinguishing process, the generated arc is discharged to the outside of the wiring circuit breaker.

[0005] The resulting electric arc can be defined as the flow of electrons under high temperature and high pressure.

[0006] The heat and pressure generated inside a wiring circuit breaker due to the interruption of current increase proportionally to the magnitude of the interrupted current.

[0007] Due to the high temperature and high voltage electric arc generated inside the wiring circuit breaker, the housing (for example, a case that houses the components of the wiring circuit breaker) of the wiring circuit breaker may be damaged. If the housing is damaged, the insulation performance of the housing will decrease.

[0008] Japanese Patent Publication No. 2001-338565 discloses an auxiliary unit attached to a circuit breaker for the purpose of overcurrent protection of a circuit or device, which detects the operating status of the circuit breaker as an electrical signal. However, it does not provide a solution to prevent damage to the enclosure by adding mechanical elements.

[0009] Therefore, a solution is needed that will not break even if the enclosure of the wiring circuit breaker is subjected to high temperature and high pressure impact. Summary of the Invention

[0010] The problem to be solved

[0011] The purpose of this invention is to provide a wiring circuit breaker whose casing is prevented from being damaged by high-temperature and high-voltage electric arcs.

[0012] Technical solutions to the problem

[0013] The objectives of the present invention described above are achieved through the following content.

[0014] An example of a wiring circuit breaker according to an embodiment of the present invention includes a housing, a plurality of base assemblies, and a tightening member. The plurality of base assemblies are housed within the housing. The tightening member is disposed between the housing and the base assemblies. Additionally, each base assembly has a base cover. The base cover has an internal space for accommodating a fixed contact, a movable contact, and an arc-extinguishing portion. A tightening member receiving portion for accommodating the tightening member is formed in the base cover.

[0015] Specifically, the tightening member includes a connecting portion and tightening portions formed at both ends of the connecting portion. The tightening portions are formed to extend in a direction vertically orthogonal to the length direction of the connecting portion.

[0016] Specifically, the connecting part is formed in the shape of a plate and has a predetermined length in one direction. The connecting part is disposed in a tightening member receiving part formed on the bottom surface of the base cover.

[0017] Specifically, a protruding insertion hole is formed in the connecting portion.

[0018] Specifically, a tightening member mounting portion is formed at the bottom of the housing for accommodating a tightening member. A guide protrusion is provided on the top surface of the tightening member mounting portion, protruding from the top surface by a predetermined length. The guide protrusion is inserted into the protrusion insertion hole.

[0019] Specifically, the tightening portion includes a one-side tightening portion and a other-side tightening portion. The one-side tightening portion is formed at one end of the connecting portion, and the other-side tightening portion is formed at the other end of the connecting portion.

[0020] Specifically, the plurality of base assemblies includes a first base assembly disposed on one side wall of the housing, a second base assembly disposed on one side of the first base assembly, and a third base assembly disposed on the other side wall of the housing. A one-sided tightening portion is disposed in a tightening member receiving portion formed on one side of the base cover of the first base assembly. A other-sided tightening portion is disposed in a tightening member receiving portion formed on one side of the base cover of the third base assembly.

[0021] Specifically, a first fixing protrusion is provided on the inner side of the tightening portion on one side, protruding inward from the outer end of the tightening portion on one side. A second fixing protrusion is provided on the inner side of the tightening portion on the other side, protruding inward from the outer end of the tightening portion on the other side.

[0022] Specifically, the first fixing protrusion is formed to slope downward from the outer end of the tightening portion on one side. The second fixing protrusion is formed to slope downward from the outer end of the tightening portion on the other side.

[0023] Specifically, the angle formed by the length direction of the connecting part and the length direction of the tightening part is 90° or an acute angle.

[0024] Specifically, a tightening member mounting portion is formed at the bottom of the housing for mounting the tightening member.

[0025] Specifically, the tightening member mounting portion is formed by protruding from the inner surface of the bottom of the housing.

[0026] Specifically, a guide protrusion is provided on the top surface of the tightening member placement part, which protrudes from the top surface by a predetermined length.

[0027] Specifically, the tightening member receiving portion is formed on the bottom surface and one side surface of the base cover.

[0028] Specifically, the tightening member receiving portion formed on the bottom surface of the base cover and the tightening member receiving portion formed on one side of the base cover are connected to each other.

[0029] Specifically, the tightening member receiving portion is formed by recessing a predetermined depth from the bottom surface and one side surface of the base cover.

[0030] Specifically, a silicone adhesive is applied to the tightening member receiving portion, and the tightening member is inserted into and fixed to the tightening member receiving portion coated with the adhesive.

[0031] Invention Effects

[0032] According to an example of an embodiment of the present invention, a wiring circuit breaker is provided with a tightening member, and / or a silicone adhesive is applied to the tightening member receiving portion formed on the base cover, thereby preventing damage to the housing. Attached Figure Description

[0033] Figure 1 This is a diagram of a wiring circuit breaker illustrating an example of an embodiment of the present invention.

[0034] Figure 2 yes Figure 1 An exploded 3D view of a circuit breaker used for wiring.

[0035] Figure 3 This is a cross-sectional view of the base assembly with the handle attached.

[0036] Figure 4 It is shown Figure 2 The diagram shows the base assembly, tightening components, and housing.

[0037] Figure 5 It is shown Figure 4 A three-dimensional view of the bottom surface of the base component.

[0038] Figure 6 yes Figure 4 Top view of the shell.

[0039] Figure 7 This is a perspective view of a tightening member illustrating an embodiment of the present invention.

[0040] Figure 8 It is shown Figure 7 A cross-sectional view of the tightening member cut along the xz direction.

[0041] Figure 9 This is a cross-sectional view of a tightening member cut along the xz direction, illustrating another embodiment of the invention. Detailed Implementation

[0042] Hereinafter, with reference to the accompanying drawings, examples of embodiments of the present invention will be described in more detail. Detailed descriptions of constituent elements of the present invention that are readily understood and reproduced by those skilled in the art will be omitted to avoid obscuring the main points of the invention.

[0043] Typically, a wiring circuit breaker (MCCB: Molded Case Circuit Breaker) is an electrical device that protects circuits and loads by automatically disconnecting the circuit in the event of an electrical overload or short circuit.

[0044] Hereinafter, an example of a wiring circuit breaker in an embodiment of the present invention will be described.

[0045] Figure 1 This is a diagram illustrating an example of a wiring circuit breaker in an embodiment of the present invention. Figure 2 yes Figure 1 An exploded 3D view of a circuit breaker used for wiring.

[0046] Reference Figure 1 and Figure 2 The wiring circuit breaker 10 of an embodiment of the present invention includes a case 12, a case cover 11, a plurality of base assemblies 13, a tightening member 14, and a trip assembly 136.

[0047] The housing 12 and housing cover 11 form the appearance of the wiring circuit breaker 10 in an example of an embodiment of the present invention.

[0048] The shell 12 and the shell cover 11 can be joined together to form a polyhedron (e.g., a hexahedron) with an internal accommodating space.

[0049] Specifically, the housing 12 is joined to the housing cover 11, thereby creating an accommodating space inside the housing 12 and the housing cover 11. The joining can be achieved by fastening components such as bolts, nuts, and screws.

[0050] The housing 12 and housing cover 11 also include other components that fasten the housing 12 and housing cover 11 to each other by means of fastening members (e.g., holes for bolts or screws to be inserted, slots for nuts to be inserted, etc.).

[0051] The receiving space formed by the combination of the housing 12 and the housing cover 11 can accommodate a plurality of base assemblies 13.

[0052] The housing 12 can be formed in the shape of a box with an opening on one side (the top surface in the attached figure) and an internal accommodating space.

[0053] The housing 12 has a bottom 121. For example, the bottom 121 refers to the base of the box.

[0054] The bottom 121 is formed in a plate shape (see reference). Figure 4 and Figure 6 ).

[0055] Specifically, the bottom 121 is formed in the shape of a plate having a predetermined length (length in the y direction in the figure), a predetermined width (length in the x direction in the figure), and a predetermined thickness (length in the z direction in the figure).

[0056] Depending on the user's needs, the bottom 121 can be formed with bends, steps, holes, grooves, etc.

[0057] A tightening member mounting section 126 is formed at the bottom 121. The tightening member mounting section 126 will be described later.

[0058] In addition, the housing 12 has a side portion 122, a side portion 123, a side wall portion 124, and a side wall portion 125.

[0059] For example, one side portion 122, the other side portion 123, one side wall portion 124, and the other side wall portion 125 represent the side panels of the box.

[0060] One side portion 122, another side portion 123, one side wall portion 124 and another side wall portion 125 are formed along the edge of the bottom 121 in a direction orthogonal to the bottom 121.

[0061] One side portion 122 and the other side portion 123 are configured to be separated by a predetermined distance and face each other.

[0062] One side portion 122 and the other side portion 123 each have one end and another end. One end and the other end are opposite to each other.

[0063] A plurality of side openings 122h are formed between one end 1221 and the other end 1222 of one side portion 122 (see reference). Figure 4 and Figure 6 ).

[0064] Additionally, a plurality of openings 123h extending through the other side portion 123 are formed between one end 1231 and the other end 1232 of the other side portion 123 (see reference). Figure 4 and Figure 6 ).

[0065] The opening 122h on one side or the opening 123h on the other side is provided with a terminal that is connected to the power supply side or the load side.

[0066] The interior and exterior of the housing 12 are electrically connected through either the opening 122h on one side or the opening 123h on the other side. This connection is achieved by an energized portion 138 penetrating both the interior and exterior of the housing 12 and being integrated into the housing 12.

[0067] One side wall portion 124 and the other side wall portion 125 are configured to be separated by a predetermined distance and face each other.

[0068] Each of the side wall portion 124 and the other side wall portion 125 includes one end and another end. The one end and the other end are opposite to each other.

[0069] One side wall portion 124 and the other side wall portion 125 are each formed in a plate shape (see reference). Figure 4 and Figure 6 ).

[0070] Specifically, one side wall portion 124 and the other side wall portion 125 are respectively formed in the form of plates having a predetermined length (length in the y direction in the figure), a predetermined thickness (length in the x direction in the figure), and a predetermined width (length in the z direction in the figure).

[0071] One side portion 122, the other side portion 123, one side wall portion 124 and the other side wall portion 125 are connected to each other.

[0072] Specifically, one end 1221 of one side portion 122 is connected to one end 1241 of one side wall portion 124, and the other end 1222 of one side portion 122 is connected to one end 1251 of another side wall portion 125.

[0073] Furthermore, one end 1231 of the other side portion 123 is connected to the other end 1242 of the side wall portion 124, and the other end 1232 of the other side portion 123 is connected to the other end 1252 of the other side wall portion 125.

[0074] The accommodating space of the housing 12 refers to the space surrounded by the bottom 121, one side portion 122, the other side portion 123, one side wall portion 124, and the other side wall portion 125.

[0075] The bottom 121, one side 122, the other side 123, one side wall 124, and the other side wall 125 can be integrally formed.

[0076] Reference Figure 4 and Figure 6 The housing 12 of the present invention includes a tightening member mounting portion 126.

[0077] The tightening component 14 is installed in the tightening component installation part 126.

[0078] A tightening component mounting section 126 is formed at the bottom 121 of the housing 12.

[0079] The tightening component mounting portion 126 can be formed by protruding from the inner surface of the bottom 121.

[0080] The tightening member mounting portion 126 can be formed by protruding with a predetermined area. Here, the predetermined area refers to a predetermined length ( Figure 4 (length in the y-direction) and width ( Figure 4 The predefined dimensions are enclosed by the length in the x-direction.

[0081] The tightening component mounting portion 126 can be positioned along the thickness direction of the bottom 121 ( Figure 4 The z-direction of the protrusion extends beyond a predetermined length.

[0082] In the tightening member mounting section 126, the pre-defined surface protruding from the inner surface of the bottom 121 refers to the top surface of the tightening member mounting section 126.

[0083] The tightening member 14 is placed on the top surface of the tightening member placement part 126.

[0084] Tightening component placement part 126 Figure 4It has a predetermined length (or width) in the x-direction. Specifically, the tightening member mounting portion 126 can be formed from one side wall portion 124 to another side wall portion 125. In other words, the tightening member mounting portion 126 includes one end and another end opposite to said one end in one direction (e.g., the x-direction). One end of the tightening member mounting portion 126 can be connected to one side wall portion 124, and the other end of the tightening member mounting portion 126 can be connected to the other side wall portion 125.

[0085] In addition, the tightening component placement part 126 is in Figure 4 It has a pre-defined length (or width) in the y-direction.

[0086] The tightening component placement section 126 includes a first placement section 126a, a second placement section 126b, and a third placement section 126c.

[0087] The first mounting part 126a and the second mounting part 126b are connected to each other, and the second mounting part 126b and the third mounting part 126c are connected to each other. The second mounting part 126b is disposed between the first mounting part 126a and the third mounting part 126c, and connects the first mounting part 126a and the third mounting part 126c.

[0088] The first resettlement department 126a, the second resettlement department 126b, and the third resettlement department 126c can be formed as a single unit. Figure 4 and Figure 6 The first mounting section 126a, the second mounting section 126b, and the third mounting section 126c shown are integrally formed.

[0089] A first connecting portion 141a of a tightening member 14 is provided in a first mounting portion 126a, a second connecting portion 141b of a tightening member 14 is provided in a second mounting portion 126b, and a third connecting portion 141c of a tightening member 14 is provided in a third mounting portion 126c.

[0090] A guide protrusion 1261 may be formed on the top surface of the tightening member mounting portion 126. In an example of an embodiment according to the present invention, the guide protrusion 1261 may not be formed.

[0091] The guide protrusion 1261 is inserted into the protrusion insertion hole formed in the connection portion 141 of the tightening member 14. Figure 7 The reference numerals 141ah, 141bh, and 141ch in the attached drawings indicate a plurality of protruding insertion holes.

[0092] The guide protrusion 1261 is formed by protruding a predetermined length (height) from the top surface of the tightening member mounting portion 126. Here, the predetermined length can be equal to or less than the thickness of the connecting portion 141 of the tightening member 14. Figure 7(length in the z direction). Thus, the guide protrusion 1261 will not penetrate the protrusion insertion hole of the tightening member 14 and protrude upward, so the connecting part 141 of the tightening member 14 contacts the base cover 131, and no space is formed between the connecting part 141 and the base cover 131.

[0093] When the tightening member 14 is placed in the tightening member placement part 126, the guide protrusion 1261 plays a guiding role during assembly by inserting into the protrusion insertion hole of the tightening member 14.

[0094] Furthermore, if the guide protrusion 1261 is inserted into the protrusion insertion hole of the tightening member 14, the movement of the tightening member 14 is restricted by the guide protrusion 1261. Thus, the tightening member 14 and the base assembly 13 are stably fixed to the housing 12. In addition, the use of fastening members (e.g., bolts, nuts, screws, etc.) used to fix the tightening member 14 and the base assembly 13 to the housing 12 is minimized.

[0095] The guide protrusion 1261 includes a first guide protrusion 126a1, a second guide protrusion 126b1, and a third guide protrusion 126c1.

[0096] A first guide protrusion 126a1 is formed in a first mounting portion 126a, a second guide protrusion 126b1 is formed in a second mounting portion 126b, and a third guide protrusion 126c1 is formed in a third mounting portion 126c.

[0097] The first guide protrusion 126a1 and the second guide protrusion 126b1 are separated by a predetermined distance. Furthermore, the second guide protrusion 126b1 and the third guide protrusion 126c1 are separated by a predetermined distance.

[0098] According to an example of an embodiment of the present invention, a first guide protrusion 126a1 to a third guide protrusion 126c1 may be formed, or only a portion thereof may be formed. For example, only the first guide protrusion 126a1 may be formed. Alternatively, only the first guide protrusion 126a1 and the third guide protrusion 126c1 may be formed. The number of guide protrusions 1261 can be suitably selected according to the user's needs.

[0099] The first guide protrusion 126a1 is inserted into the first protrusion insertion hole 141ah formed in the connecting portion 141 of the tightening member 14, the second guide protrusion 126b1 is inserted into the second protrusion insertion hole 141bh formed in the connecting portion 141, and the third guide protrusion 126c1 is inserted into the third protrusion insertion hole 141ch formed in the connecting portion 141.

[0100] The first guide protrusion 126a1 and the first protrusion insertion hole 141ah can be formed in corresponding shapes, the second guide protrusion 126b1 and the second protrusion insertion hole 141bh can be formed in corresponding shapes, and the third guide protrusion 126c1 and the third protrusion insertion hole 141ch can be formed in corresponding shapes. For example, if the first guide protrusion 126a1 is formed in the shape of a triangular prism, the first protrusion insertion hole 141ah can be in the shape of a triangle.

[0101] The guide protrusion 1261 of the tightening member placement portion 126 and the protrusion insertion holes 141ah, 141bh, and 141ch of the tightening member 14 are formed in corresponding shapes, and the movement of the tightening member 14 is further restricted when it is placed in the tightening member placement portion 126.

[0102] On the other hand, the housing 12 is formed of an insulating material such as plastic or synthetic resin. Therefore, it can prevent safety accidents that may occur due to arbitrary current flow through the housing 12.

[0103] The housing cover 11 serves to cover the housing 12. Through the housing cover 11, the constituent elements disposed in the receiving space of the housing 12 (e.g., the base assembly 13, etc.) are not exposed to the outside.

[0104] The housing cover 11 can be formed in the shape of a box with an opening on one side (the bottom surface in the attached figure) and an internal receiving space.

[0105] The upper plate of the housing cover 11 can be formed with bends, steps, holes, grooves, etc., according to the user's needs.

[0106] A through hole is formed in the upper plate of the housing cover 11. A handle 1351 is disposed in the through hole.

[0107] The housing cover 11 has a side panel formed along the edge of the upper plate in a direction orthogonal to the upper plate.

[0108] The side panel formed on the housing cover 11 can be connected to one side portion 122, another side portion 123, one side wall portion 124 and / or another side wall portion 125 formed on the housing 12. As mentioned above, the connection can be achieved by fastening members.

[0109] The housing 12 contains components for cutting off power and extinguishing the generated arc when an abnormal current (fault current) occurs.

[0110] Specifically, a plurality of base assemblies 13 are accommodated in the receiving space of the housing 12. That is, a plurality of base assemblies 13 are disposed in the receiving space of the housing 12. Figure 2 , Figure 4 as well as Figure 5 Three base components 13a, 13b, and 13c are shown.

[0111] Figure 2 , Figure 4 as well as Figure 5 The plurality of base assemblies 13 shown include a first base assembly 13a, a second base assembly 13b, and a third base assembly 13c. The first base assembly 13a is disposed on one side wall 124 of the housing 12, the second base assembly 13b is disposed on one side of the first base assembly 13a, and the third base assembly 13c is disposed on the other side wall 125 of the housing 12. The second base assembly 13b is disposed between the first base assembly 13a and the third base assembly 13c.

[0112] Plural (e.g., such as) Figure 2 , Figure 4 as well as Figure 5 Each of the three base assemblies 13 shown has the same or similar structure; however, any one of the plurality of base assemblies 13 (e.g., Figure 2 , Figure 4 as well as Figure 5 The base assembly 13b, located in the middle of the base assembly 13 shown, is equipped with a handle 1351.

[0113] Figure 3 This is a cross-sectional view of the base assembly 13b with the handle 1351 installed.

[0114] Apart from the handle 1351 and the various components for mounting the handle 1351, the plurality of base assemblies 13 may all be formed in the same or similar structure.

[0115] Although Figure 2 , Figure 4 as well as Figure 5 Three base assemblies 13a, 13b, and 13c are shown, but this is not a limitation. Base assembly 13 can be configured with four or more depending on the user's needs.

[0116] A plurality of base assemblies 13 are connected to each other. Each of the plurality of base assemblies 13 includes various constituent elements that enable the plurality of base assemblies 13 to be connected to each other.

[0117] Multiple base assemblies 13 are connected to each other and are simultaneously energized or de-energized.

[0118] Any one of the plurality of base assemblies 13 is equipped with a handle 1351 and various constituent elements for mounting the handle 1351.

[0119] By operating the handle 1351, the plurality of base assemblies 13 can be simultaneously energized or de-energized.

[0120] As mentioned above, the components and operating principles for connecting the plurality of base assemblies 13 to each other and simultaneously energizing or de-energizing them follow known techniques.

[0121] Reference Figures 2 to 4 The base assembly 13 includes a base cover 131 and a fixed contact 132, a movable contact 133, an opening / closing mechanism 135, an arc-extinguishing part 134, and a tripping part 136 housed within the base cover 131. The tripping part 136 refers to... Figure 2 The tripping component 136 is shown.

[0122] The base cover 131 forms the appearance of the base assembly 13.

[0123] The base cover 131 may have an internal receiving space, and the base cover 131 may be formed in a polyhedral shape (e.g., a hexahedral shape). Each face of the polyhedron may be formed with bends, steps, holes, grooves, etc., according to the user's needs.

[0124] For ease of assembly of the constituent elements constituting the base assembly 13, the base cover 131 has a physically separate first base cover 1311 and a second base cover 1312.

[0125] The first base cover 1311 and the second base cover 1312 can be manufactured separately and then joined together. The joining can be achieved by fastening components such as bolts, nuts, and screws.

[0126] The first base cover 1311 and the second base cover 1312 form the appearance of the base assembly 13. The first base cover 1311 may be configured, for example, on the left side, and the second base cover 1312 may be configured, for example, on the right side.

[0127] According to an example of an embodiment of the present invention, the first base cover 1311 and the second base cover 1312 can be formed symmetrically to each other. That is, the opposite sides of the first base cover 1311 and the second base cover 1312 can be formed with the same structure. Similarly, the opposite sides of the first base cover 1311 and the second base cover 1312 can be formed with the same structure.

[0128] Spaces are formed inside the first base cover 1311 and the second base cover 1312. The spaces are connected to each other when the first base cover 1311 and the second base cover 1312 are joined together. The spaces accommodate a fixed contact 132, a movable contact 133, an opening and closing mechanism 135, an arc extinguishing part 134, and a tripping part 136, etc.

[0129] The base cover 131 includes a tightening member receiving portion 139. In other words, a tightening member receiving portion 139 is formed on the base cover 131.

[0130] The tightening member receiving portion 139 may be formed in the shape of a groove.

[0131] The tightening component receiving part 139 accommodates the tightening component 14.

[0132] Figure 5 It is shown Figure 4 A three-dimensional view of the bottom surface of the base component. Figure 5 The bottom surface of the base assembly shown faces upwards.

[0133] Reference Figures 4 to 5 The tightening component receiving portion 139 is formed on the bottom surface of the base assembly 13 (specifically, the base cover 131).

[0134] The tightening member receiving portion 139 can be formed from the bottom surface of the base cover 131 to the top surface. Figure 5 (in the z-direction) recess. The tightening member receiving part 139 can be oriented towards Figure 5 The z-direction indentation has a pre-defined length (depth).

[0135] The tightening member receiving portion 139 can be formed by recessing into a predetermined area. Here, the predetermined area refers to a predetermined length ( Figure 5 (length in the y-direction) and width ( Figure 5 The predefined dimensions are enclosed by the length in the x-direction.

[0136] Additionally, the tightening member receiving portion 139 may be formed on one or both sides of the base cover 131.

[0137] In an embodiment where the tightening member receiving portion 139 is formed on one side of the base cover 131, this side can be configured to face outwards. Here, the outside can be the inner surface of one side wall portion 124 or the inner surface of the other side wall portion 125 of the housing 12.

[0138] For example, if a tightening member receiving portion 139 is formed on one side of the base cover 131 in the first base assembly 13a, then the side is configured to face the inner surface of one side wall portion 124 of the housing 12.

[0139] Furthermore, if a tightening member receiving portion 139 is formed on one side of the base cover 131 in the third base assembly 13c, then the one side is configured to face the inner surface of the other side wall portion 125 of the housing 12.

[0140] The tightening member receiving portion 139 formed on one side of the base cover 131 can be formed to be recessed inward from one side of the base cover 131. The tightening member receiving portion 139 can be recessed with a predetermined length (depth). In addition, the tightening member receiving portion 139 can be formed to be recessed with a predetermined area.

[0141] In an example where the tightening member receiving portion 139 is formed on both sides of the base cover 131, the two sides refer to the sides facing each other, and the tightening member receiving portion 139 formed on the two sides can be recessed in the direction facing each other (inward).

[0142] In the first base assembly 13a, one of the two sides of the base cover 131 is configured to face the inner surface of one side wall portion 124 of the housing 12.

[0143] Furthermore, in the third base assembly 13c, one of the two sides of the base cover 131 is configured to face the inner surface of the other side wall 125 of the housing 12.

[0144] The tightening member receiving portions 139 formed on both sides of the base cover 131 can be formed to be recessed inward from both sides of the base cover 131. The tightening member receiving portions 139 can be recessed with a predetermined length (depth) and can be formed with a predetermined area.

[0145] The tightening member receiving portion 139 formed on the bottom surface of the base cover 131 and the tightening member receiving portion 139 formed on one (or both) side surfaces of the base cover 131 are connected to each other.

[0146] In other words, the tightening member receiving portion 139 formed on the bottom surface of the base cover 131 and the tightening member receiving portion 139 formed on one side (or both sides) of the base cover 131 are formed in an integrally formed groove shape. Here, integrally formed means that they are connected to each other to form one.

[0147] The tightening member 14 is accommodated in the tightening member receiving part 139.

[0148] Specifically, a connecting portion 141 of a tightening member 14 is disposed (or accommodated) in the tightening member receiving portion 139 formed on the bottom surface of the base cover 131 (see reference). Figure 7 Furthermore, the tightening portions 142 and 143 of the tightening member 14 are disposed (or accommodated) in the tightening member receiving portion 139 formed on one side (or one of the two sides) of the base cover 131 (see reference). Figure 7 ).

[0149] Although not illustrated, according to another embodiment of the invention, each of the respective base assemblies 13a, 13b, 13c is provided with a tightening member 14, instead of a single tightening member 14 that surrounds all of the plurality of (e.g., three) base assemblies 13. More specifically, in this embodiment, tightening portions 142, 143 of the tightening member 14 are disposed in tightening member receiving portions 139 formed on both sides of each base cover 131.

[0150] The tightening member receiving portion 139 is formed in each of the plurality of base assemblies 13 (specifically, base cover 131).

[0151] In a plurality of (e.g., Figure 2 , Figure 4 as well as Figure 5 Each of the three base assemblies 13 shown has a tightening member receiving portion 139. The tightening member receiving portion 139 is formed in the base cover 131.

[0152] Thus, the tightening member receiving portion 139 includes a first tightening member receiving portion 139a, a second tightening member receiving portion 139b, and a third tightening member receiving portion 139c.

[0153] The first tightening member receiving portion 139a is formed on the base cover 131 of the first base assembly 13a, the second tightening member receiving portion 139b is formed on the base cover 131 of the second base assembly 13b, and the third tightening member receiving portion 139c is formed on the base cover 131 of the third base assembly 13c.

[0154] The first tightening member receiving portion 139a, the second tightening member receiving portion 139b, and the third tightening member receiving portion 139c are in one direction ( Figure 5 The first tightening member receiving portion 139a, the second tightening member receiving portion 139b, and the third tightening member receiving portion 139c are arranged on the same central axis along one direction.

[0155] If a plurality of base assemblies 13 are assembled to the housing 12, the first tightening member receiving portion 139a is disposed on the first placement portion 126a formed in the tightening member placement portion 126 of the housing 12, the second tightening member receiving portion 139b is disposed on the second placement portion 126b, and the third tightening member receiving portion 139c is disposed on the third placement portion 126c.

[0156] If tighten component 14 (refer to) Figure 7When assembled into a plurality of base assemblies 13, a first connecting portion 141a of a tightening member 14 is disposed (or accommodated) in a first tightening member receiving portion 139a, a second connecting portion 141b of a tightening member 14 is disposed (or accommodated) in a second tightening member receiving portion 139b, and a third connecting portion 141c of a tightening member 14 is disposed (or accommodated) in a third tightening member receiving portion 139c.

[0157] Specifically, if the tightening member 14 is assembled to a plurality of base assemblies 13, a connecting portion 141 of the tightening member 14 is disposed (or accommodated) in a tightening member receiving portion 139 formed on the bottom surface of the plurality of base assemblies 13 (specifically, base cover 131). Furthermore, a tightening portion 142 formed at one end of the tightening member 14 is disposed (or accommodated) in a tightening member receiving portion 139 formed on one side of the first base assembly 13a (specifically, base cover 131). And a tightening portion 143 formed at the other end of the tightening member 14 is disposed (or accommodated) in a tightening member receiving portion 139 formed on one side of the third base assembly 13c (specifically, base cover 131).

[0158] The wiring circuit breaker 10 of the present invention includes a tightening member 14.

[0159] Figure 7 This is a perspective view of a tightening member illustrating an embodiment of the present invention. Figure 8 It is shown Figure 7 A cross-sectional view of the tightening member cut along the xz direction.

[0160] Reference Figures 4 to 8 The tightening member 14 is disposed between the base assembly 13 and the housing 12.

[0161] Specifically, the tightening member 14 is disposed below the base assembly 13 (specifically, the base cover 131) and between the inner surface of the bottom 121 of the housing 12.

[0162] The tightening member 14 is accommodated in the tightening member receiving portion 139 formed on the bottom surface and / or one side surface of the base cover 131, and is disposed in the tightening member placement portion 126 formed on the bottom 121 of the housing 12.

[0163] In another embodiment of the present invention described above (an example in which each base assembly 13a, 13b, 13c is individually provided with a tightening member 14), the tightening member 14 is housed in a tightening member receiving portion 139 formed on the bottom surface and both sides of each base cover 131, and is respectively disposed in a tightening member placement portion 126 formed on the bottom 121 of the housing 12.

[0164] If a fault current (abnormal current) is applied to the wiring circuit breaker 10, the fault current is interrupted in the base assembly 13 connected to each phase, and the heat and pressure generated are discharged from the exhaust port.

[0165] If the interrupted current increases, the heat and pressure generated in each base assembly 13 increase proportionally to the magnitude of the interrupted current. The outer base assemblies 13 (e.g., the first base assembly 13a and the third base assembly 13c) are momentarily pushed open and impact the housing 12. This can cause the housing 12 to break. If the housing 12 breaks, its insulation performance will significantly decrease.

[0166] The components that need to solve the aforementioned problems. In other words, the wiring circuit breaker 10 needs to be equipped with components that prevent the base assembly 13, which is located on the outside, from being pushed against the housing 12.

[0167] The tightening component 14 is equivalent to a constituent element that can solve the aforementioned problems.

[0168] The tightening member 14 includes a connecting portion 141 and tightening portions 142 and 143 formed at both ends of the connecting portion 141.

[0169] The connecting part 141 and the tightening parts 142 and 143 are formed in the form of plates.

[0170] Connecting part 141 in one direction ( Figure 7 The connecting portion 141 has a predetermined length in the x-direction (as described in the previous section). Furthermore, the connecting portion 141 has a length in a direction orthogonal to the horizontal direction (as described in the previous section). Figure 7 The connecting portion 141 has a predetermined length (width) in the y-direction. Furthermore, the connecting portion 141 is in a direction vertically orthogonal to said direction (…). Figure 7 It has a pre-defined length (thickness) in the z-direction.

[0171] The connecting part 141 includes a first connecting part 141a, a second connecting part 141b, and a third connecting part 141c.

[0172] If we describe the connection relationship of the first connecting part 141a, the second connecting part 141b, and the third connecting part 141c with one direction as a reference, then in one direction, the first connecting part 141a and the second connecting part 141b are connected to each other, and the second connecting part 141b and the third connecting part 141c are connected to each other. In one direction, the second connecting part 141b is disposed between the first connecting part 141a and the third connecting part 141c, and connects the first connecting part 141a and the third connecting part 141c.

[0173] The first connecting portion 141a, the second connecting portion 141b, and the third connecting portion 141c can be integrally formed. The accompanying drawings show the case where the first connecting portion 141a, the second connecting portion 141b, and the third connecting portion 141c are integrally formed.

[0174] The connecting portion 141 is formed of an elastic material. Therefore, the connecting portion 141 elastically deforms when an external force is applied, and returns to its original shape by restoring force when the external force is removed.

[0175] The first connecting portion 141a is disposed in the first mounting portion 126a of the tightening member mounting portion 126 formed in the housing 12, the second connecting portion 141b is disposed in the second mounting portion 126b, and the third connecting portion 141c is disposed in the third mounting portion 126c.

[0176] According to an example of an embodiment of the present invention, protruding insertion holes 141ah, 141bh, and 141ch may be formed in the connecting portion 141. The protruding insertion holes 141ah, 141bh, and 141ch are in a direction orthogonal to a vertical direction (…). Figure 7 A hole in the z-direction of the connecting part 141.

[0177] The guide protrusion 1261 formed in the tightening member placement part 126 is inserted into and disposed in the protrusion insertion holes 141ah, 141bh, and 141ch.

[0178] The protruding insertion holes 141ah, 141bh, and 141ch include a first protruding insertion hole 141ah, a second protruding insertion hole 141bh, and a third protruding insertion hole 141ch.

[0179] A first protruding insertion hole 141ah is formed in the first connecting portion 141a, a second protruding insertion hole 141bh is formed in the second connecting portion 141b, and a third protruding insertion hole 141ch is formed in the third connecting portion 141c.

[0180] The first protruding insertion hole 141ah and the second protruding insertion hole 141bh are separated by a predetermined distance. Furthermore, the second protruding insertion hole 141bh and the third protruding insertion hole 141ch are separated by a predetermined distance.

[0181] A first guide protrusion 126a1 formed in the tightening member placement portion 126 is inserted into the first protrusion insertion hole 141ah, a second guide protrusion 126b1 is inserted into the second protrusion insertion hole 141bh, and a third guide protrusion 126c1 is inserted into the third protrusion insertion hole 141ch.

[0182] As mentioned above, the first protrusion insertion hole 141ah can be formed in a shape corresponding to the first guide protrusion 126a1, the second protrusion insertion hole 141bh can be formed in a shape corresponding to the second guide protrusion 126b1, and the third protrusion insertion hole 141ch can be formed in a shape corresponding to the third guide protrusion 126c1.

[0183] If the tightening member 14 is assembled to a plurality of base assemblies 13, the first connecting portion 141a of the tightening member 14 is disposed (or accommodated) in the first tightening member accommodating portion 139a, the second connecting portion 141b is disposed (or accommodated) in the second tightening member accommodating portion 139b, and the third connecting portion 141c is disposed (or accommodated) in the third tightening member accommodating portion 139c.

[0184] Specifically, if the tightening member 14 is assembled to a plurality of base assemblies 13, the first connecting portion 141a is disposed on the tightening member receiving portion 139a formed on the bottom surface of the first base assembly 13a (specifically, the base cover 131), the second connecting portion 141b is disposed on the tightening member receiving portion 139b formed on the bottom surface of the second base assembly 13b (specifically, the base cover 131), and the third connecting portion 141c is disposed on the tightening member receiving portion 139c formed on the bottom surface of the third base assembly 13c (specifically, the base cover 131).

[0185] The connecting portion 141 includes one end and another end opposite to the first end. The first end and the other end are opposite to each other in one direction.

[0186] One end of the connecting part 141 corresponds to one end of the first connecting part 141a, and the other end of the connecting part 141 corresponds to the other end of the third connecting part 141c.

[0187] Tightening portions 142 and 143 are formed at one end of the first connecting portion 141a and the other end of the third connecting portion 141c.

[0188] The tightening parts 142 and 143 serve to support or tighten the sides of the base cover 131 to prevent the base assembly 13 (specifically, the base cover 131) from being pushed toward the housing 12.

[0189] The tightening portions 142 and 143 are formed by extending in a direction that is vertically orthogonal to the length direction (one direction) of the connecting portion 141.

[0190] The tightening portion 142 formed at one end of the first connecting portion 141a can be named "one-sided tightening portion 142", and the tightening portion 143 formed at the other end of the third connecting portion 141c can be named "other-sided tightening portion 143".

[0191] One side tightening portion 142 extends from one end of the first connecting portion 141a toward a direction ( Figure 7 The x-direction in the middle) is the vertically orthogonal direction ( Figure 7 It is formed by extending in the z direction. A tightening portion 142 on one side is formed by extending to a predetermined length. Here, the predetermined length may be the same as the length (height) of the tightening member receiving portion 139 formed on one side (or one of the two sides) of the base cover 131.

[0192] A tightening portion 142 is disposed (or accommodated) in a tightening member accommodating portion 139 formed on one side of the first base assembly 13a (specifically, the base cover 131).

[0193] The outer surface of the tightening portion 142 can face the inner surface of the side wall portion 124 of the housing 12 and contact the inner surface of the side wall portion 124.

[0194] According to an example of an embodiment of the present invention, a fixing protrusion 1421 (which may be named "first fixing protrusion 1421") may be formed on the inner side of the tightening portion 142 on one side.

[0195] The first fixed protrusion 1421 is formed on the inner side of the one-sided tightening portion 142, and protrudes inward from the outer end of the one-sided tightening portion 142. Here, the inner side refers to the direction parallel to the length direction (one direction) of the connecting portion 141 and in which the connecting portion 141 is formed.

[0196] The first fixing protrusion 1421 is formed to slope downward from the outer end of the one-sided tightening portion 142. That is, the first fixing protrusion 1421 is formed to protrude more as it gets closer to the inner end of the outer end of the one-sided tightening portion 142. Here, the inner end of the one-sided tightening portion 142 refers to the position where it is connected to the first connecting portion 141a.

[0197] In an embodiment where a first fixing protrusion 1421 is formed on the inner side of a tightening portion 142 on one side, a groove (not shown) for inserting the first fixing protrusion 1421 is formed in the tightening member receiving portion 139 formed on one side of the first base assembly 13a (specifically, the base cover 131). (This can be named "first protrusion insertion groove"). By inserting the first fixing protrusion 1421 into the first protrusion insertion groove, the tightening member 14 can be securely fixed to the base cover 131. As a result, the use of fastening members for fixing the tightening member 14 to the base cover 131 can be minimized.

[0198] Furthermore, since the first fixing protrusion 1421 is formed to slope downward from the outer end of the tightening part 142 on one side, the first fixing protrusion 1421 can be easily inserted into the first protrusion insertion groove, and will not easily separate after insertion.

[0199] On the other hand, the tightening portion 143 extends from the other end of the third connecting portion 141c toward a direction ( Figure 7 The x-direction in the middle) is the vertically orthogonal direction ( Figure 7 The tightening portion 143 extends in the z-direction of the base cover 131. The tightening portion 143 extends to a predetermined length. Here, the predetermined length may be the same as the length (height) of the tightening member receiving portion 139 formed on one side (or one of the two sides) of the base cover 131.

[0200] The other tightening portion 143 is configured (or accommodated) in a tightening member accommodating portion 139 formed on one side of the third base assembly 13c (specifically, the base cover 131).

[0201] The outer surface of the other tightening portion 143 may face the inner surface of the other side wall portion 125 of the housing 12 and contact the inner surface of the other side wall portion 125.

[0202] According to an example of an embodiment of the present invention, a fixing protrusion 1431 (which may be named "second fixing protrusion 1431") may be formed on the inner side of the tightening portion 143 on the other side.

[0203] The second fixed protrusion 1431 is formed on the inner side of the other tightening portion 143, and protrudes inward from the outer end of the other tightening portion 143. Here, the inner side refers to the direction parallel to the length direction (one direction) of the connecting portion 141 and in which the connecting portion 141 is formed.

[0204] The second fixing protrusion 1431 is formed to slope downward from the outer end of the other tightening portion 143. That is, the second fixing protrusion 1431 is formed to protrude more as it gets closer to the inner end of the outer end of the other tightening portion 143. Here, the inner end of the other tightening portion 143 refers to the position where it connects with the third connecting portion 141c.

[0205] In an embodiment where a second fixing protrusion 1431 is formed on the inner side of the tightening portion 143 on the other side, a groove (not shown) for inserting the second fixing protrusion 1431 is formed in the tightening member receiving portion 139 formed on one side of the third base assembly 13c (specifically, the base cover 131) (which can be named "second protrusion insertion groove"). By inserting the second fixing protrusion 1431 into the second protrusion insertion groove, the tightening member 14 is securely fixed to the base cover 131. As a result, the use of fastening members for fixing the tightening member 14 to the base cover 131 can be minimized.

[0206] Furthermore, since the second fixing protrusion 1431 is formed to slope downward from the outer end of the tightening part 143 on the other side, the second fixing protrusion 1431 can be easily inserted into the second protrusion insertion groove, and will not easily separate after insertion.

[0207] According to an example of an embodiment of the present invention, in order to prevent the base assembly 13 (specifically, the base cover 131) from opening when the fault current is interrupted, a silicone adhesive can be applied to the tightening member receiving portion 139 formed in the base cover 131, and the tightening member 14 can be inserted into and fixed to the tightening member receiving portion 139 coated with the adhesive. Then, the base assembly 13 and the tightening member 14 can be assembled together into the interior of the housing 12.

[0208] Additionally, the tightening member 14 may include a protrusion (not shown).

[0209] For example, the protrusion may be formed between the first connecting portion 141a and the second connecting portion 141b of the tightening member 14 and / or between the second connecting portion 141b and the third connecting portion 141c.

[0210] The protrusion is formed in the same direction as the tightening portions 142 and 143.

[0211] In the plurality of base assemblies 13, the protrusion is disposed in the space formed between the base assembly 13 and the adjacent base assembly 13, and serves to individually reinforce the base assembly 13.

[0212] Figure 9 This is a cross-sectional view of a tightening member cut along the xz direction, illustrating another embodiment of the invention.

[0213] In another embodiment of the present invention, the tightening member 14' includes a connecting portion 141' and tightening portions 142' and 143'. The tightening portions 142' and 143' include a one-sided tightening portion 142' and a other-sided tightening portion 143'. Furthermore, a first fixing protrusion 1421' may be formed on one-sided tightening portion 142', and a second fixing protrusion 1431' may be formed on the other-sided tightening portion 143'.

[0214] In another embodiment of the invention, the tightening member 14' and Figures 7 to 8 The difference between the tightening member 14 shown in the example of one embodiment of the present invention and the other is only in the angle between the connecting portion and the tightening portion. Therefore, the constituent elements of the tightening member 14' in another embodiment of the present invention are the same as those of the tightening member 14 in the example of one embodiment of the present invention described above, and thus the specific description is replaced by the foregoing description.

[0215] exist Figures 7 to 8In the example of a specific embodiment of the present invention shown, the angle between the connecting portion 141 and the tightening portions 142 and 143 is 90°.

[0216] Specifically, the angle formed by the longitudinal direction of the connecting portion 141 and the longitudinal direction of the tightening portions 142 and 143 is approximately 90°. Therefore, the tightening portions 142 and 143 can be easily inserted into the tightening member receiving portion 139 formed on one side of the base assembly 13 (specifically, the base cover 131). Here, the longitudinal direction of the connecting portion 141 refers to a direction or... Figure 8 In the x-direction, the length direction of the tightening parts 142 and 143 refers to the direction that is vertically orthogonal to the aforementioned direction. Figure 8 The z-direction in the equation.

[0217] On the contrary, in Figure 9 In the example of another embodiment of the present invention shown, the angle between the connecting portion 141' and the tightening portions 142' and 143' is an acute angle θ.

[0218] Specifically, the angle formed by the length direction of the connecting portion 141' and the length directions of the tightening portions 142' and 143' is equivalent to an acute angle θ. Therefore, if the tightening portions 142' and 143' are inserted into the tightening member receiving portion 139 formed on one side of the base assembly 13 (specifically, the base cover 131), they will not easily separate from the tightening member receiving portion 139. Furthermore, the tightening portions 142' and 143' provide stronger support or tighten the side of the base cover 131 more forcefully, preventing the base cover 131 from being pushed against the housing 12. Here, the length direction of the connecting portion 141' refers to one direction or... Figure 9 In the x-direction, the length direction of the tightening parts 142' and 143' refers to the direction that is vertically orthogonal to the aforementioned direction. Figure 9 The z-direction in the equation.

[0219] Because the tightening member 14' is made of an elastic material, when the tightening member 14' is inserted (interference fit) into the tightening member receiving portion 139 formed on one side of the base cover 131, the tightening portions 142' and 143' open outwards from the tightening member 14'. Afterwards, once the tightening member 14' has been fully inserted into the tightening member receiving portion 139, the tightening portions 142' and 143' apply pressure to the tightening member receiving portion 139 due to restoring force.

[0220] On the other hand, if an abnormal current (fault current) flows in the wiring circuit breaker 10, the tripping unit 136 cuts off the external and internal power supply to the wiring circuit breaker 10. In other words, the tripping unit 136 senses the overcurrent or short-circuit current flowing in the circuit and guides the tripping action of the switching mechanism 135.

[0221] The tripping section 136 is housed within a portion of the housing 12. The tripping section 136 is electrically connected to the fixed contact 132.

[0222] The tripping unit 136 includes a tripping lever, a trip unit, and a resilient member to perform its function. If the tripping unit 136 is activated, the opening and closing mechanism 135 connected to the tripping unit 136 is activated, so that external users can easily identify that a tripping action has been performed.

[0223] Since the operation process of the trip unit 136 and the operation process of the opening and closing mechanism unit 135 through the trip unit 136 are known technologies, detailed descriptions thereof are omitted.

[0224] An opening and closing mechanism 135 is configured (or installed) in any one of the plurality of base assemblies 13.

[0225] The opening and closing mechanism 135 moves the movable contact 133 to provide the power required for opening and closing the circuit.

[0226] The opening and closing mechanism 135 includes a handle 135 and various components for mounting and driving the handle 1351.

[0227] The opening and closing mechanism 135 is connected to the shaft 137, and the shaft 137 rotates when the opening and closing mechanism 135 rotates. That is, the shaft 137 can rotate by receiving the force from the opening and closing mechanism 135.

[0228] The opening and closing mechanism 135 rotates due to the operation of the tripping part 136. As a result, the shaft 137 also rotates, thereby causing the fixed contact 132 and the movable contact 133 to come into contact with or separate from each other.

[0229] A rotating pin 1371 is provided through the shaft 137. The shaft 137 receives the opening and closing power of the opening and closing mechanism 135 and rotates through the rotating pin 1371. The movable contact 133 also rotates with the shaft 137, thereby contacting or separating from the fixed contact 132.

[0230] Since the process by which the opening and closing mechanism 135 and the shaft 137 rotate due to the action of the tripping unit 136 is known technology, a detailed description thereof is omitted.

[0231] The movable contact 133 is rotatably configured (or mounted) on the shaft 137.

[0232] The movable contact 133 rotates with or alone in a counterclockwise or clockwise direction to contact or separate from the fixed contact 132. If the movable contact 133 and the fixed contact 132 are in contact, the circuit is energized; if the movable contact 133 and the fixed contact 132 are separated, the circuit is de-energized (in other words, disconnected).

[0233] The fixed contact 132 is configured to be separated from the movable contact 133 by a predetermined distance.

[0234] An arc-extinguishing part 134 is arranged around the part where the fixed contact 132 and the movable contact 133 are in contact with or separated from each other.

[0235] When the circuit is in normal condition, the fixed contact 132 and the movable contact 133 are in contact, and current flows in the circuit.

[0236] Conversely, if an abnormal current occurs in the circuit, a tripping action is performed by the operation of the tripping section 136 and the opening / closing mechanism section 135. That is, the movable contact 133 rotates and separates from the fixed contact 132, and the current in the circuit is cut off. At this time, an electric arc is generated around the part where the movable contact 133 and the fixed contact 132 separate (see reference). Figure 3 ).

[0237] The size (intensity) of the electric arc A is proportional to the magnitude of the current. Electric arc A is a phenomenon where atmospheric gas instantaneously becomes plasma due to voltage. The center temperature of electric arc A reaches 8,000°C to 12,000°C and possesses explosive expansion pressure. Therefore, electric arc A melts and consumes contacts 132 and 133, and degrades and damages surrounding components.

[0238] Furthermore, due to the electric arc A, the outer base assemblies 13 (e.g., the first base assembly 13a and the third base assembly 13c) are momentarily pushed aside, impacting the housing 12. This can cause damage to the housing 12. If the housing 12 is damaged, its insulation performance will significantly decrease.

[0239] Specifically, due to the high temperature and high voltage arc A generated when the abnormal current (fault current) is interrupted, the first base cover 1311 and the second base cover 1312 of the base cover 131 may open up, and a gap may be generated between the first base cover 1311 and the second base cover 1312. At this time, the first base cover 1311 and the second base cover 1312 exert pressure on one side wall portion 124 and the other side wall portion 125 of the housing 12, which may cause the housing 12 to break.

[0240] In an example of an embodiment of the present invention, the wiring circuit breaker 10 is provided with a tightening member 14 and / or a silicone adhesive is coated on the tightening member receiving portion 139 formed on the base cover 131, thereby preventing damage to the housing 12.

[0241] Whether arc A continues or not has a significant impact on the performance and durability of the circuit breaker. Therefore, it is necessary to quickly cut off, extinguish, and discharge arc A within the arc-extinguishing section 134.

[0242] The arc extinguishing section 134 extinguishes the electric arc A generated when the abnormal current is interrupted.

[0243] As the electric arc A enters the grid 1341, it is broken into short arcs, and the voltage of arc A increases. Furthermore, due to the presence of arc-extinguishing gases such as SF6 within the arc-extinguishing section 134, the voltage of arc A increases further. Therefore, arc A is extinguished by suppressing the release of free electrons.

[0244] Arc A is generated when the fixed contact 132 and the movable contact 133 separate. Arc A is extinguished when it passes through the arc extinguishing part 134 and discharged to the outside of the wiring circuit breaker 10.

[0245] The arc-extinguishing section 134 is located near the contact points of the fixed contact 132 and the movable contact 133. Specifically, the arc-extinguishing section 134 is located near the contact points of the fixed contact 132 and the movable contact 133 and near the path of rotation of the movable contact 133. As a result, the electric arc A extending along the movable contact 133 can easily enter the arc-extinguishing section 134.

[0246] A plurality of arc-extinguishing parts 134 may be provided. The plurality of arc-extinguishing parts 134 are respectively configured to be adjacent to the positions that contact the fixed contact 132 and the movable contact 133.

[0247] The arc-extinguishing part 134 includes a support plate (not marked) and a grid plate 1341.

[0248] Multiple support plates may be provided. The multiple support plates are configured to be separate from each other and facing each other, and support grid plates 1341 on both sides.

[0249] The grid plate 1341 applies a magnetic force to the generated electric arc A. The generated electric arc A is extinguished as it passes between the grid plates 1341 by the magnetic force applied by the grid plate 1341 and discharged to the outside of the wiring circuit breaker 10.

[0250] The grid 1341 is formed of a magnetic material. This is to cause the generated arc A to flow toward the arc outlet by applying an attractive force to the arc A, which is a flow of electrons.

[0251] The grid plate 1341 may have a defined space formed on the side facing the movable contact 133. The movable contact 133 can rotate when passing through the space. The rotation path of the movable contact 133 is located between the grid plates 1341. Thus, the electric arc A can be guided by the grid plates 1341.

[0252] A plurality of grid plates 1341 may be provided. The plurality of grid plates 1341 are separated from each other and stacked. The generated electric arc A is extinguished and moved through the space formed between the grid plates 1341.

[0253] The plurality of grid plates 1341 can be stacked vertically and can be stacked at an angle according to the position of the passage for discharging the electric arc A. Thus, the electric arc A can pass through the space between the plurality of grid plates 1341 and can move smoothly toward the passage for discharging the electric arc A.

[0254] As described above, in an example of an embodiment of the present invention, the wiring circuit breaker 10 can fasten the tightening member 14 to the tightening member receiving portion 139 formed in the base cover 131 to prevent the base assembly 13 (specifically, the base cover 131) from opening when the fault current is interrupted.

[0255] In addition, in an embodiment of the present invention, the wiring circuit breaker 10 can be fitted with a silicone adhesive after the tightening member receiving portion 139 formed on the base cover 131 is coated with the tightening member receiving portion 139 coated with the adhesive, and then the tightening member 14 can be inserted into and fixed to the tightening member receiving portion 139 coated with the adhesive.

[0256] Therefore, it can prevent the casing 12 from breaking.

[0257] The features, structures, and effects described in the above embodiments belong to at least one embodiment of the present invention, but are not necessarily limited to only one embodiment. Furthermore, those skilled in the art can combine or modify the features, structures, and effects exemplified in each embodiment to implement other embodiments. Therefore, it should be understood that the content related to such combinations and modifications falls within the scope of the present invention.

[0258] Furthermore, the above description focuses on the implementation state, but this is merely an example and not a limitation of the invention. Those skilled in the art will understand that various modifications and applications not illustrated can be made without departing from the essential characteristics of this implementation state. That is, the specific constituent elements appearing in the implementation state can be modified. Moreover, it should be understood that any differences related to such modifications and applications fall within the scope of the invention as defined in the claims.

Claims

1. A circuit breaker for wiring, wherein, include: case; A plurality of base assemblies are housed in the housing; as well as A tightening member is disposed between the housing and the base assembly; The base assembly has a base cover, which has an internal space to accommodate a fixed contact, a movable contact, and an arc-extinguishing part. The base cover has a tightening member receiving portion for accommodating the tightening member.

2. The circuit breaker for wiring according to claim 1, wherein, The tightening member includes a connecting portion and tightening portions formed at both ends of the connecting portion; The tightening portion is formed by extending in a direction perpendicular to the length direction of the connecting portion.

3. The circuit breaker for wiring according to claim 2, wherein, The connecting part is formed in the shape of a plate and has a predetermined length in one direction; The connecting portion is disposed in the tightening member receiving portion formed on the bottom surface of the base cover.

4. The circuit breaker for wiring according to claim 3, wherein, A protruding insertion hole is formed in the connecting part.

5. The circuit breaker for wiring according to claim 3, wherein, A protruding insertion hole is formed in the connecting portion; A tightening member mounting portion is formed at the bottom of the housing, and the tightening member is mounted in the tightening member mounting portion; A guide protrusion is provided on the top surface of the tightening member placement part, which protrudes from the top surface by a predetermined length; The guide protrusion is inserted into the protrusion insertion hole.

6. The circuit breaker for wiring according to claim 2, wherein, The tightening part includes a tightening part on one side and a tightening part on the other side; The tightening portion on one side is formed at one end of the connecting portion, and the tightening portion on the other side is formed at the other end of the connecting portion.

7. The circuit breaker for wiring according to claim 6, wherein, The plurality of said base assemblies include a first base assembly disposed on one side wall of the housing, a second base assembly disposed on one side of the first base assembly, and a third base assembly disposed on the other side wall of the housing; The tightening portion is disposed on a tightening member receiving portion formed on one side of the base cover of the first base assembly; The other tightening portion is disposed in a tightening member receiving portion formed on one side of the base cover of the third base assembly.

8. The circuit breaker for wiring according to claim 6, wherein, A first fixing protrusion is provided on the inner side of the tightening part on one side, which protrudes inward from the outer end of the tightening part on one side. A second fixing protrusion is provided on the inner side of the tightening part on the other side, which protrudes inward from the outer end of the tightening part on the other side.

9. The circuit breaker for wiring according to claim 8, wherein, The first fixed protrusion is formed to slope downward from the outer end of the tightening portion on one side; The second fixed protrusion is formed to slope downward from the outer end of the tightening portion on the other side.

10. The circuit breaker for wiring according to claim 2, wherein, The angle formed by the length direction of the connecting part and the length direction of the tightening part is 90° or an acute angle.

11. The circuit breaker for wiring according to claim 1, wherein, A tightening member mounting portion is formed at the bottom of the housing, and the tightening member is mounted in the tightening member mounting portion.

12. The circuit breaker for wiring according to claim 11, wherein, The tightening member mounting portion is formed by protruding from the inner surface of the bottom.

13. The circuit breaker for wiring according to claim 11, wherein, A guide protrusion is provided on the top surface of the tightening member mounting part, which protrudes from the top surface by a predetermined length.

14. The circuit breaker for wiring according to claim 1, wherein, The tightening member receiving portion is formed on the bottom surface and one side surface of the base cover.

15. The circuit breaker for wiring according to claim 14, wherein, The tightening member receiving portion formed on the bottom surface of the base cover and the tightening member receiving portion formed on one side of the base cover are connected to each other.

16. The circuit breaker for wiring according to claim 1, wherein, The tightening member receiving portion is formed by recessing a predetermined depth from the bottom surface and one side surface of the base cover.

17. The circuit breaker for wiring according to claim 1, wherein, A silicone adhesive is applied to the receiving portion of the tightening member, and the tightening member is inserted into and fixed to the receiving portion of the tightening member coated with the adhesive.

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