circuit breaker

Abstract

The application provides a circuit breaker, and relates to the technical field of low-voltage electrical apparatuses. The circuit breaker comprises a contact mechanism, an arc discharge structure and an outgoing line plate. The arc discharge structure is provided with an arc discharge channel, the arc discharge channel is communicated with an external space of the circuit breaker, and at least part of the contact mechanism is installed in the arc discharge channel. The outgoing line plate is arranged in a spaced manner with the arc discharge structure, and the outgoing line plate is electrically connected with the contact mechanism through a flexible connection. The side of the arc discharge structure close to the flexible connection is provided with a clearance slot. According to the circuit breaker provided by the application, the breaking performance of the circuit breaker can be improved, and the use reliability of the circuit breaker can be ensured.

Description

Technical Field

[0001] This application relates to the field of low-voltage electrical technology, and more particularly to a circuit breaker. Background Technology

[0002] Circuit breakers can switch from the closed state to the open state in the event of faults such as short circuits, overloads, and leakage in the circuit, thereby reducing the possibility of further expansion of the fault in the circuit and providing safety protection for the circuit.

[0003] The circuit breaker includes a contact mechanism. Based on the existing circuit breaker structure, an electric arc will be generated between the moving contact and the stationary contact of the contact mechanism during the process of switching the circuit breaker from the closed state to the open state.

[0004] Based on the existing circuit breaker structure, during the use of the circuit breaker, there may be situations where the circuit breaker's breaking is unreliable, which in turn affects the reliability of the circuit breaker's use. Utility Model Content

[0005] This application provides a circuit breaker, which can improve the breaking performance of the circuit breaker and ensure the reliability of the circuit breaker in use.

[0006] In a first aspect, this application provides a circuit breaker. The circuit breaker includes a contact mechanism, an arc-quenching structure, and a terminal block. The arc-quenching structure has an arc-quenching channel that communicates with the external space of the circuit breaker, and at least a portion of the contact mechanism is installed within the arc-quenching channel. The terminal block is spaced apart from the arc-quenching structure and is electrically connected to the contact mechanism via a flexible connector. The arc-quenching structure has a clearance groove on the side near the flexible connector.

[0007] During the operation of a circuit breaker, the copper braided wire hardens under the influence of an electric arc. Compared to existing technologies, when the hardened copper braided wire comes into contact with the arc-clearing structure, it affects the operation of the contact mechanism installed inside the arc-clearing structure, thus impacting the circuit breaker's breaking performance. In this application example, a clearance groove is provided near the flexible connection on the arc-clearing structure. This increases the distance between the arc-clearing structure and the flexible connection, reducing the possibility of contact between them. Consequently, it lowers the likelihood of the flexible connection affecting the operation of the contact mechanism within the arc-clearing channel, ensuring the circuit breaker's breaking performance and reliability.

[0008] In addition, the arc extinguishing channel is connected to the external space of the circuit breaker, which allows the arc in the arc extinguishing channel to be discharged from the circuit breaker, reducing the possibility of the arc accumulating inside the circuit breaker, and thus reducing the possibility of the arc causing damage to the internal structure of the circuit breaker.

[0009] In some possible implementations, the arc-clearing structure includes a first arc-blocking plate and a second arc-blocking plate, which cooperate to form an arc-clearing channel. The flexible connection includes a first flexible connection and a second flexible connection, one end of the first flexible connection is connected to the contact mechanism, and the other end of the first flexible connection is connected to the outlet plate. The first flexible connection is positioned close to the first arc-blocking plate.

[0010] The circuit breaker also includes a double metal structure, which is located on the side of the second arc-blocking plate away from the first arc-blocking plate. The double metal structure is electrically connected between the contact mechanism and the outlet plate. One end of the second flexible connection is connected to the contact mechanism, and the other end of the second flexible connection is electrically connected to the outlet plate through the double metal structure. Part of the second flexible connection is located on the side of the second arc-blocking plate away from the first arc-blocking plate.

[0011] The first arc-blocking plate is provided with a clearance groove, and / or the second arc-blocking plate is provided with a clearance groove.

[0012] In this application example, the clearance groove provided on the first arc-blocking plate allows for a larger distance between the first flexible connection and the first arc-blocking plate, reducing the possibility of contact between the first flexible connection and the first arc-blocking plate. This, in turn, reduces the likelihood of the contact mechanism's operation being affected by contact between the first flexible connection and the first arc-blocking plate, ensuring the circuit breaker's breaking reliability. Similarly, the clearance groove provided on the second arc-blocking plate allows for a larger distance between the second flexible connection and the second arc-blocking plate, reducing the possibility of contact between the second flexible connection and the second arc-blocking plate. This, in turn, reduces the likelihood of the contact mechanism's operation being affected by contact between the second flexible connection and the second arc-blocking plate, ensuring the circuit breaker's breaking reliability.

[0013] In some possible implementations, the clearance slot is an arc-shaped slot or a rectangular slot.

[0014] Regardless of whether the clearance slot is arc-shaped or rectangular, it is always located within the arc-arc structure. Therefore, by setting a clearance slot, the distance between the flexible connection and the arc-arc structure can be increased, reducing the possibility of contact between them. This, in turn, reduces the likelihood of the flexible connection hardening and affecting the contact mechanism's operation, ensuring the circuit breaker's breaking performance and ultimately guaranteeing its reliability.

[0015] In some possible implementations, the contact mechanism includes a cooperating moving contact and a stationary contact. The stationary contact is fixedly installed within the arc-extinguishing channel, and the moving contact is rotatable relative to the stationary contact. A portion of the moving contact extends into the arc-extinguishing channel, and the moving contact within the arc-extinguishing channel can contact the stationary contact. The portion of the moving contact outside the arc-extinguishing channel is provided with a first arc-blocking plate, which is located on the side of the moving contact closest to the stationary contact. The circuit breaker also includes an operating mechanism connected to the moving contact. The first arc-blocking plate is located between the arc-extinguishing channel and the operating mechanism, and it blocks a portion of the opening of the arc-extinguishing channel facing the operating mechanism.

[0016] In this example, the stationary contact is fixedly disposed within the arc-extinguishing channel. A portion of the moving contact located within the arc-extinguishing channel can contact or separate from the stationary contact. During the separation of the moving and stationary contacts, an electric arc is generated between them within the arc-extinguishing channel. Since a first arc-blocking plate is provided on the moving contact outside the arc-extinguishing channel, and this plate is located on the side of the moving contact facing the stationary contact, and between the opening and the operating mechanism, the first arc-blocking plate can block at least part of the opening. The electric arc generated between the moving and stationary contacts will impact the first arc-blocking plate as it exits the arc-extinguishing channel through the opening. Therefore, by providing the first arc-blocking plate, the possibility of the electric arc entering the operating mechanism from the opening and causing damage to the operating mechanism can be reduced, ensuring the reliability of the circuit breaker.

[0017] In some possible implementations, the moving contact includes a cooperating contact support and a moving contact body. The contact support is located outside the arc extinguishing channel, a portion of the moving contact body extends into the arc extinguishing channel, and a portion of the moving contact located within the arc extinguishing channel can contact the stationary contact. A first arc-blocking plate is located on the side of the contact support near the stationary contact.

[0018] Compared to the contact body, which is typically formed from metal materials through processes such as powder metallurgy, casting, and extrusion, the contact support is usually formed through injection molding. Therefore, the forming process of the contact support is simpler and less expensive than that of the contact body. Based on this, placing the first arc-blocking plate in the contact support is less expensive than placing it in the contact body, thus reducing the overall manufacturing cost of the circuit breaker.

[0019] In some possible implementations, the first arc-blocking plate includes an arc-blocking body and a connecting portion arranged at an angle. The arc-blocking body is disposed on the contact support and extends toward the stationary contact. One end of the connecting portion is connected to the end of the arc-blocking body near the stationary contact, and the other end of the connecting portion is connected to the contact support.

[0020] In this example, the arc-blocking body is located on the contact support and extends toward the stationary contact. Therefore, the contact body can block part of the arc generated between the moving contact and the stationary contact, reducing the possibility of the arc entering the operating mechanism through the opening.

[0021] Furthermore, the arc-blocking body and the connecting part are angled together, with the arc-blocking body positioned on the contact support. One end of the connecting part is connected to the arc-blocking body, and the other end is connected to the contact support. Therefore, the connecting part provides support for the arc-blocking body, reducing the possibility of damage during use and thus ensuring the reliability of the circuit breaker.

[0022] In some possible implementations, a second arc-blocking plate is provided on the side of the first arc-blocking plate facing the second arc-blocking plate, and a third arc-blocking plate is provided on the side of the second arc-blocking plate facing the first arc-blocking plate. The third arc-blocking plate is spaced apart from the second arc-blocking plate, and both the second and third arc-blocking plates are located at the opening.

[0023] In this example, the second arc-blocking plate is located on the side of the first arc-blocking plate facing the second arc-blocking plate, and the third arc-blocking plate is located on the side of the second arc-blocking plate facing the first arc-blocking plate. The second and third arc-blocking plates are located at the opening. Therefore, during the process of the electric arc being discharged from the opening into the arc-discharging channel, some metal particles in the electric arc fall into the arc-discharging channel due to impact with the second and third arc-blocking plates, which can further reduce the possibility of the electric arc entering the operating mechanism through the opening and damaging the operating mechanism.

[0024] In some possible implementations, an insulating element is provided between the double-metal structure and the arc-arc structure, and the projection of the end of the insulating element near the operating mechanism along the direction from the double-metal structure to the arc-arc structure is outside the projection range of the arc-arc structure.

[0025] In this example, the stationary contact is installed within the arc-extinguishing channel. The arc-extinguishing channel has an opening on the side facing the operating mechanism, and the arc-extinguishing channel is connected to other spaces inside the circuit breaker through the opening. Both the stationary contact and the bimetallic structure are conductive components. Based on this, an insulating component is provided on the side of the bimetallic structure facing the arc-extinguishing structure. Furthermore, along the direction from the bimetallic structure to the arc-extinguishing structure, the projection of the end of the insulating component near the operating mechanism is outside the projection range of the arc-extinguishing structure. This reduces the possibility of breakdown between the stationary contact and the bimetallic structure during the use of the circuit breaker, improves the breaking capacity of the circuit breaker, and ensures the reliability of the circuit breaker.

[0026] In some possible implementations, the insulating element includes an insulating body and a bent portion arranged at an angle, with the insulating body located on the side of the bimetallic structure facing the arc-arranging structure, and the bent portion located on the side of the bimetallic structure facing the operating mechanism.

[0027] In this example, the insulating body is located on the side of the bimetallic structure facing the arc-discharging structure, and the bent portion is located on the side of the bimetallic structure facing the operating mechanism. Therefore, the insulating body and the bent portion can protect the bimetallic structure from different directions, improve the breaking capacity of the circuit breaker, reduce the possibility of breakdown between the stationary contact inside the arc-discharging structure and the bimetallic structure during the use of the circuit breaker, and ensure the reliability of the circuit breaker.

[0028] In some possible implementations, the circuit breaker also includes a housing, with the insulation disposed within the housing. Alternatively, the insulation may be fixedly connected to a bimetallic structure.

[0029] In this application example, whether the insulating component is located in the housing or is fixedly connected to the bimetallic structure, at least some of the insulating components can be located between the bimetallic structure and the arc-quenching structure. During the use of the circuit breaker, this reduces the possibility of breakdown between the stationary contact in the arc-quenching structure and the bimetallic structure, improves the breaking capacity of the circuit breaker, and ensures the reliability of the circuit breaker. Attached Figure Description

[0030] Figure 1 This is a partial structural diagram of a circuit breaker provided as an example of this application.

[0031] Figure 2 This is a schematic diagram of an arc-shaped structure provided as an example in this application.

[0032] Figure 3 This is a partial structural diagram of a circuit breaker provided as an example of this application.

[0033] Figure 4 This is a schematic diagram illustrating the interaction between a moving contact and an arc-arc structure, as provided in this application.

[0034] Figure 5 This is a schematic diagram of the structure of a moving contact provided as an example of this application.

[0035] Figure 6 This is a schematic diagram of the structure of a first arc-blocking plate provided as an example of this application.

[0036] Figure 7 This is a partial structural diagram of a circuit breaker provided as an example of this application.

[0037] Figure 8 for Figure 7 A magnified view of a portion of point A in the middle.

[0038] Explanation of reference numerals in the attached figures: 100. Circuit breaker; 110. Contact mechanism; 111. Moving contact; 1111. Contact support; 1112. Moving contact body; 112. First arc-blocking plate; 1121. Arc-blocking body; 1122. Connecting part; 113. Stationary contact; 120. Arc-clearing structure; 121. Relief groove; 122. Arc-clearing channel; 123. First arc-blocking plate; 1231. Second arc-blocking plate; 124. Second arc-blocking plate; 130. Outgoing plate; 140. Flexible connection; 141. First flexible connection; 142. Second flexible connection; 150. Operating mechanism; 160. Bimetallic structure; 170. Insulating component; 171. Insulating body; 172. Bending part; 180. Housing. Detailed Implementation

[0039] To make the purpose, technical solutions, and advantages of the examples in this application clearer, the technical solutions in the examples of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described examples are only a part of the examples in this application, not all of them. Based on the examples in this application, all other examples obtained by those skilled in the art without inventive effort are within the scope of protection of this application.

[0040] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terms used herein in the description of the application are for the purpose of describing particular examples only and are not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the description, claims and drawings of this application are intended to cover non-exclusive inclusion.

[0041] In this document, the term "example" means that a particular feature, structure, or characteristic described in connection with the example can be included in at least one example of this application. The appearance of the phrase "example" in various places in the specification does not necessarily refer to the same example, nor is it a separate or alternative example mutually exclusive with other examples. It will be explicitly and implicitly understood by those skilled in the art that the examples described herein can be combined with other examples.

[0042] In this article, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can mean: A exists, A and B exist simultaneously, or B exists. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0043] The directional terms used in the following description refer to the directions shown in the figures and are not intended to limit the specific structure of the circuit breaker in this application.

[0044] Furthermore, the terms "first," "second," etc., in the specification and claims of this application or in the aforementioned drawings are used to distinguish different objects rather than to describe a specific order, and may explicitly or implicitly include one or more of the features.

[0045] In the description of this application, unless otherwise stated, "multiple" means two or more (including two), and similarly, "multiple groups" means two or more (including two groups).

[0046] In the description of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, "connection" or "joining" in mechanical structures can refer to a physical connection, such as a fixed connection, for example, a connection fixed by a partition, such as a connection fixed by screws, bolts, or other partitions; a physical connection can also be a detachable connection, such as a snap-fit ​​or interlocking connection; a physical connection can also be an integral connection, such as a connection formed by welding, bonding, or integral molding. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0047] To enable those skilled in the art to better understand the present application, the circuit breaker provided in the example of the present application will be clearly and completely described below with reference to the accompanying drawings.

[0048] For example, this application provides a circuit breaker. Figure 1 This application provides a partial structural schematic diagram of a circuit breaker as an example. Figure 2 For a schematic diagram of an arc-shaped structure provided as an example in this application, please refer to... Figure 1 and Figure 2 The circuit breaker 100 includes a contact mechanism 110, an arc-quenching structure 120, and a terminal block 130. The arc-quenching structure 120 has an arc-quenching channel 122, which communicates with the external space of the circuit breaker 100. At least a portion of the contact mechanism 110 is installed within the arc-quenching channel 122. The terminal block 130 is spaced apart from the arc-quenching structure 120 and is electrically connected to the contact mechanism 110 via a flexible connector 140. The arc-quenching structure 120 has a clearance groove 121 on the side closest to the flexible connector 140.

[0049] The contact mechanism 110 can switch the circuit breaker 100 between the closed and open states. During the process of switching the circuit breaker 100 from the closed state to the open state, an electric arc will be generated at the contact mechanism 110. Since the contact mechanism 110 is installed in the arc extinguishing channel 122, the electric arc will move within the arc extinguishing channel 122.

[0050] The arc-removing structure 120 can be formed by multiple plate-shaped structures, or it can be an integral structure. This application example does not impose specific restrictions on this, as long as the arc-removing structure 120 has an arc-removing channel 122 in the middle so that the electric arc generated at the contact mechanism 110 can move within the arc-removing channel 122 until it is discharged outside the circuit breaker 100.

[0051] The outlet plate 130 and the arc-discharging structure 120 are spaced apart. One end of the outlet plate 130 can be electrically connected to an external conductor, and the other end of the external conductor can be electrically connected to the contact mechanism 110 through a flexible connection 140. The external conductor can be electrically connected to the circuit breaker 100 through the outlet plate 130.

[0052] The flexible connector 140 can be a copper braided wire, copper strip, or other flexible conductive material that can electrically connect the contact head mechanism 110 and the output plate 130.

[0053] The arc-shaped structure 120 is provided with a clearance groove 121 on the side near the flexible connection 140. There may be one clearance groove 121 or multiple clearance grooves 121. This application example does not make specific restrictions on this.

[0054] The clearance groove 121 is a groove provided on the arc-shaped structure 120. The clearance groove 121 can be a regular groove structure or a groove structure of any shape. For example, the groove structure can be an arc groove or a rectangular groove, or a combination of arc grooves, or a combination of rectangular grooves and arc grooves, or a combination of rectangular grooves, etc.

[0055] During the use of circuit breaker 100, the copper braided wire hardens under the influence of electric arc. Compared with the prior art, the hardened copper braided wire comes into contact with the arc-quenching structure 120, affecting the operation of the contact mechanism 110 installed inside the arc-quenching structure 120, and thus affecting the breaking performance of circuit breaker 100. In this application example, a clearance groove 121 is provided at the position of the arc-quenching structure 120 near the flexible connection 140. This increases the distance between the arc-quenching structure 120 and the flexible connection 140, reduces the possibility of the flexible connection 140 coming into contact with the arc-quenching structure 120, and thus reduces the possibility of the flexible connection 140 affecting the operation of the contact mechanism 110 in the arc-quenching channel 122, ensuring the breaking performance of circuit breaker 100 and ensuring the reliability of circuit breaker 100.

[0056] In addition, the arc extinguishing channel 122 is connected to the external space of the circuit breaker 100, which allows the arc in the arc extinguishing channel 122 to be discharged from the circuit breaker 100, reducing the possibility of the arc accumulating inside the circuit breaker 100, and thus reducing the possibility of the arc causing damage to the internal structure of the circuit breaker 100.

[0057] Based on the circuit breaker 100 provided in the above example, Figure 3 Please refer to the partial structural diagram of a circuit breaker provided as an example in this application. Figures 1-3The arc-arcing structure 120 includes a first arc-blocking plate 123 and a second arc-blocking plate 124, which cooperate to form an arc-arcing channel 122. The flexible connection 140 includes a first flexible connection 141 and a second flexible connection 142. One end of the first flexible connection 141 is connected to the contact mechanism 110, and the other end of the first flexible connection 141 is connected to the outlet plate 130. The first flexible connection 141 is located close to the first arc-blocking plate 123.

[0058] The circuit breaker 100 also includes a double metal structure 160, which is disposed on the side of the second arc breaker plate 124 away from the first arc breaker plate 123. The double metal structure 160 is electrically connected between the contact mechanism 110 and the outlet plate 130. One end of the second flexible connection 142 is connected to the contact mechanism 110, and the other end of the second flexible connection 142 is electrically connected to the outlet plate 130 through the double metal structure 160. Part of the second flexible connection 142 is disposed on the side of the second arc breaker plate 124 away from the first arc breaker plate 123.

[0059] The first arc-blocking plate 123 is provided with a clearance groove 121, and / or the second arc-blocking plate 124 is provided with a clearance groove (not shown in the figure).

[0060] The first arc-blocking plate 123 and the second arc-blocking plate 124 cooperate to form an arc-discharging channel 122, which is the space between the first and second arc-blocking plates.

[0061] The first flexible connection 141 and the second flexible connection 142 are connected to the contact mechanism 110 outside the arc discharge channel 122. The positions of the first flexible connection 141 and the second flexible connection 142 connected to the contact mechanism 110 are as close as possible to the rotation center of the contact mechanism 110 to ensure the reliability of the connection between the first flexible connection 141 and the contact mechanism 110, as well as the reliability of the connection between the second flexible connection 142 and the contact mechanism 110.

[0062] The first flexible connection 141 and the second flexible connection 142 can be connected to the same position on the contact mechanism 110, or they can be connected to different positions on the contact mechanism 110 at intervals. One end of the first flexible connection 141 is connected to the contact mechanism 110, and the other end is connected to the outlet plate 130. One end of the second flexible connection 142 is connected to the contact mechanism 110, and the other end is connected to the double-metal structure 160. The double-metal structure 160 is connected to the outlet plate 130 via the third flexible connection 140.

[0063] During the operation of circuit breaker 100, when the current inside circuit breaker 100 passes through contact mechanism 110, part of the current reaches the output plate 130 via the first flexible connection 141, and then reaches the load through the external wire electrically connected to output plate 130, allowing the load to be in a working state. Another part of the current passes through the second flexible connection 142, through bimetallic structure 160, and then through third flexible connection 140 to reach output plate 130. In the event of an overload in the circuit, the current in the circuit increases, and the current flowing through bimetallic structure 160 increases. The bimetallic structure 160 is heated and bends, directly or indirectly driving contact mechanism 110 to operate, thereby putting circuit breaker 100 in the open state and preventing the overload fault in the circuit from further escalating.

[0064] The clearance groove 121 may be provided only on the first arc-blocking plate 123, or only on the second arc-blocking plate 124. The clearance groove 121 may also be provided on both the first arc-blocking plate 123 and the second arc-blocking plate 124. The clearance groove 121 provided on the first arc-blocking plate 123 and the clearance groove provided on the second arc-blocking plate 124 may be the same or different. This application example does not impose specific restrictions on this.

[0065] In this application example, the clearance groove 121 provided on the first arc-blocking plate 123 allows for a larger distance between the first flexible connection 141 and the first arc-blocking plate 123, reducing the possibility of contact between the first flexible connection 141 and the first arc-blocking plate 123. This, in turn, reduces the possibility of the contact mechanism 110 being affected by contact between the first flexible connection 141 and the first arc-blocking plate 123, ensuring the breaking reliability of the circuit breaker 100. Similarly, the clearance groove 121 provided on the second arc-blocking plate 124 allows for a larger distance between the second flexible connection 142 and the second arc-blocking plate 124, reducing the possibility of contact between the second flexible connection 142 and the second arc-blocking plate 124. This, in turn, reduces the possibility of the contact mechanism 110 being affected by contact between the second flexible connection 142 and the second arc-blocking plate 124, ensuring the breaking reliability of the circuit breaker 100.

[0066] Based on the circuit breaker 100 provided in the example above, please refer to 1~ Figure 3 The clearance groove 121 is an arc-shaped groove or a rectangular groove.

[0067] The shape of the relief groove 121 provided on the first arc-blocking plate 123 may be the same as or different from the shape of the relief groove 121 provided on the second arc-blocking plate 124. This application example does not impose specific restrictions on this.

[0068] Regardless of whether the clearance groove 121 is an arc-shaped groove or a rectangular groove, the clearance groove 121 is always located on the arc-shaped structure 120. Therefore, by setting the clearance groove 121, the distance between the flexible connection 140 and the arc-shaped structure 120 can be made larger, reducing the possibility of the flexible connection 140 contacting the arc-shaped structure 120, thereby reducing the possibility of the flexible connection 140 hardening and affecting the operation of the contact mechanism 110, ensuring the breaking performance of the circuit breaker 100, and thus ensuring the reliability of the circuit breaker 100.

[0069] Based on the circuit breaker 100 provided in the above example, Figure 4 Please refer to the schematic diagram of the cooperation between the moving contact and the arc-arc structure provided as an example of this application. Figures 1-4 The contact mechanism 110 includes a cooperating moving contact 111 and a stationary contact. The stationary contact is fixedly installed in the arc-extinguishing channel 122. The moving contact 111 is rotatable relative to the stationary contact, and a portion of the moving contact 111 extends into the arc-extinguishing channel 122. The moving contact 111 located in the arc-extinguishing channel 122 can contact the stationary contact. The portion of the moving contact 111 located outside the arc-extinguishing channel 122 is provided with a first arc-blocking plate 112, and the first arc-blocking plate 112 is located on the side of the moving contact 111 closest to the stationary contact. The circuit breaker 100 also includes an operating mechanism 150, which is connected to the moving contact 111. The first arc-blocking plate 112 is located between the arc-extinguishing channel 122 and the operating mechanism 150, and the first arc-blocking plate 112 blocks a portion of the opening of the arc-extinguishing channel 122 facing the operating mechanism 150.

[0070] The structure of the operating mechanism 150 in this application example is similar to that of the operating mechanism in the prior art, and the connection method between the operating mechanism 150 and the moving contact 111 is similar to the connection method between the operating mechanism and the moving contact in the prior art. This application example will not be described in detail here.

[0071] The stationary contact is fixedly installed inside the arc-extinguishing channel 122. The rotation center of the moving contact 111 is located outside the arc-extinguishing channel 122, and the rotation center of the moving contact 111 is set close to the operating mechanism 150. Part of the moving contact 111 can extend into the arc-extinguishing channel 122. The moving contact 111 can rotate relative to the stationary contact under the drive of the operating mechanism 150 to adjust the contact state between the moving contact 111 and the stationary contact.

[0072] When the moving contact 111 is in contact with the stationary contact, the circuit breaker 100 is in the closed state, and current flows through the circuit. When the stationary contact is separated from the moving contact 111, the circuit breaker 100 is in the open state, and no current flows through the circuit.

[0073] The moving contact 111 outside the arc channel 122 is provided with a first arc-blocking plate 112, and the first arc-blocking plate 112 is located on the side of the moving contact 111 facing the stationary contact. The first arc-blocking plate 112 can be an arc-shaped plate, a straight plate, etc., or it can be a combination of a straight plate and an arc-shaped plate or a combination of arc-shaped plates. This application example does not make specific limitations in this regard.

[0074] The first arc-blocking plate 112 is located between the arc-discharging channel 122 and the operating mechanism 150. Along the direction from the operating mechanism 150 toward the arc-discharging channel 122, the first arc-blocking plate 112 blocks part of the opening of the arc-discharging channel 122 toward the operating mechanism 150.

[0075] At least one end of the first arc-blocking plate 112 is connected to the moving contact 111. The first arc-blocking plate 112 and the moving contact 111 can be integrally formed, or the first arc-blocking plate 112 and the moving contact 111 can be connected by welding, bonding, fusion bonding, riveting, or other methods.

[0076] The first baffle plate 112 is located on the side of the moving contact 111 facing the stationary contact. The end of the first baffle plate 112 near the stationary contact is a free end, and the end of the first baffle plate 112 away from the stationary contact is connected to the moving contact 111. Alternatively, the end of the first baffle plate 112 near the stationary contact is connected to the moving contact 111, and the end of the first baffle plate 112 away from the stationary contact is a free end. Or, both ends of the first baffle plate 112 are connected to the moving contact 111. As long as it is ensured that the first baffle plate 112 will not interfere with the rotation of the moving contact 111 during the rotation of the moving contact 111, thus affecting the rotation of the moving contact 111.

[0077] In this example, the stationary contact is fixedly disposed within the arc extinguishing channel 122. A portion of the moving contact 111 located within the arc extinguishing channel 122 can contact or separate from the stationary contact. During the separation of the moving contact 111 from the stationary contact, an electric arc is generated between the moving contact 111 and the stationary contact within the arc extinguishing channel 122. Since a first arc-blocking plate 112 is provided on the portion of the moving contact 111 outside the arc extinguishing channel 122, and the first arc-blocking plate 112 is located on the side of the moving contact 111 facing the stationary contact, and is situated between the opening of the arc extinguishing channel 122 and the operating mechanism 150, the first arc-blocking plate 112 can block at least part of the opening. During the process of the electric arc generated between the moving contact 111 and the stationary contact exiting the arc extinguishing channel 122 through the opening, it will impact the first arc-blocking plate 112. Therefore, by providing the first arc-blocking plate 112, the possibility of the electric arc entering the operating mechanism 150 from the opening and causing damage to the operating mechanism 150 can be reduced, ensuring the reliability of the circuit breaker 100.

[0078] Based on the circuit breaker 100 provided in the above example, Figure 5 For a schematic diagram of a moving contact provided as an example in this application, please refer to... Figures 1-5 The moving contact 111 includes a cooperating contact support 1111 and a moving contact body 1112. The contact support 1111 is located outside the arc quenching channel 122, and part of the moving contact body 1112 extends into the arc quenching channel 122. The part of the moving contact 111 located inside the arc quenching channel 122 can contact the stationary contact. The first arc-blocking plate 112 is located on the side of the contact support 1111 close to the stationary contact.

[0079] The contact support 1111 and the contact body can be connected by means of threaded connection, riveting, welding, etc. The contact support 1111 can also be integrated with the contact body by means of overmolding, etc.

[0080] The operating state of the circuit breaker 100 can be adjusted by adjusting the contact state between the moving contact body 1112 and the stationary contact, thereby providing protection for the circuit.

[0081] Compared to the contact body, which is typically formed from metal materials through processes such as powder metallurgy, casting, and extrusion, the contact support 1111 is usually formed by injection molding. Therefore, the forming process of the contact support 1111 is simpler and less expensive than that of the contact body. Based on this, compared to the first arc-blocking plate 112 being located on the contact body, the first arc-blocking plate 112 being located on the contact support 1111 results in lower manufacturing costs, thus reducing the manufacturing cost of the circuit breaker 100.

[0082] Based on the circuit breaker 100 provided in the example above, please refer to... Figures 1-5 The first arc-blocking plate 112 includes an arc-blocking body 1121 and a connecting portion 1122 arranged at an angle. The arc-blocking body 1121 is disposed on the contact support 1111 and extends toward the stationary contact. One end of the connecting portion 1122 is connected to the end of the arc-blocking body 1121 near the stationary contact, and the other end of the connecting portion 1122 is connected to the contact support 1111.

[0083] The arc-blocking body 1121 can be in the form of a flat plate structure, a curved plate structure, a combination of a flat plate structure and a curved plate structure, or a combination of two curved plate structures.

[0084] The arc-blocking body 1121 and the connecting part 1122 can be fitted together to form any one of an acute angle, a right angle, or an obtuse angle, as long as the connecting part 1122 can connect the end of the contact support 1111 and the arc-blocking body 1121 facing the stationary contact.

[0085] In this application example, the arc-blocking body 1121 is provided on the contact support 1111 and extends toward the stationary contact. Therefore, the contact body can block part of the electric arc generated between the moving contact 111 and the stationary contact, reducing the possibility of the electric arc entering the operating mechanism 150 through the opening.

[0086] Furthermore, the arc-blocking body 1121 and the connecting part 1122 are set at an angle, and the arc-blocking body 1121 is provided on the contact support 1111. One end of the connecting part 1122 is connected to the arc-blocking body 1121, and the other end of the connecting part 1122 is connected to the contact support 1111. Therefore, the connecting part 1122 can provide support for the arc-blocking body 1121, reduce the possibility of damage to the arc-blocking body 1121 during use, and thus ensure the reliability of the circuit breaker 100.

[0087] Based on the circuit breaker 100 provided in the above example, Figure 6 For a structural schematic diagram of a first arc-blocking plate provided as an example of this application, please refer to... Figure 2 and Figure 6 A second arc-blocking plate 1231 is provided on the side of the first arc-blocking plate 123 facing the second arc-blocking plate 124, and a third arc-blocking plate is provided on the side of the second arc-blocking plate 124 facing the first arc-blocking plate 123. The third arc-blocking plate and the second arc-blocking plate 1231 are spaced apart, and both the second arc-blocking plate 1231 and the third arc-blocking plate are located at the opening.

[0088] The second baffle plate 1231 can be flush with the opening or lower than the opening. The third baffle plate can be flush with the opening or lower than the opening. The second baffle plate 1231 and the third baffle plate can be located on the same plane or on different planes. This application example does not impose specific limitations in this regard.

[0089] The shape of the third baffle plate can be the same as or different from that of the second baffle plate 1231. The shape of the second baffle plate 1231 can be a straight plate structure, a curved plate structure, or a combination of straight and curved plate structures. The shape of the third baffle plate can be a straight plate structure, a curved plate structure, or a combination of straight and curved plate structures.

[0090] In this example, the second arc-blocking plate 1231 is located on the side of the first arc-blocking plate 123 facing the second arc-blocking plate 124, and the third arc-blocking plate is located on the side of the second arc-blocking plate facing the first arc-blocking plate 123. The second arc-blocking plate 1231 and the third arc-blocking plate are located at the opening. Therefore, during the process of the electric arc being discharged from the opening into the arc-discharging channel 122, some metal particles in the electric arc fall into the arc-discharging channel 122 due to impact with the second arc-blocking plate 1231 and the third arc-blocking plate. This can further reduce the possibility of the electric arc entering the operating mechanism 150 through the opening and damaging the operating mechanism 150.

[0091] Based on the circuit breaker 100 provided in the above example, Figure 7 This application provides a partial structural schematic diagram of a circuit breaker as an example. Figure 8 for Figure 7 Please refer to the enlarged view of part A in the middle. Figure 7 and Figure 8 An insulating element 170 is provided between the double-metal structure 160 and the arc-arc structure 120. Along the direction from the double-metal structure 160 toward the arc-arc structure 120, the projection of the end of the insulating element 170 near the operating mechanism 150 is outside the projection range of the arc-arc structure 120.

[0092] Along the direction from the double-metal structure 160 toward the arc-arc cascading structure 120, the projection of the end of the insulating member 170 near the operating mechanism 150 is outside the projection range of the arc-arc cascading structure 120. This can be achieved by setting the insulating member 170 at a position near the opening of the arc-arc cascading channel 122 in the double-metal structure 160.

[0093] The insulating component 170 can be fixedly connected to the bimetallic structure 160, and the insulating component 170 can also be connected to other structures within the circuit breaker 100, as long as the insulating component 170 is positioned between the bimetallic structure 160 and the arc-extinguishing structure 120.

[0094] In this example, the stationary contact 113 is installed within the arc-extinguishing channel 122. The arc-extinguishing channel 122 has an opening on the side facing the operating mechanism 150, and the arc-extinguishing channel 122 is connected to other spaces inside the circuit breaker 100 through the opening. Both the stationary contact 113 and the bimetallic structure 160 are conductive components. Based on this, an insulating component 170 is provided on the side of the bimetallic structure 160 facing the arc-extinguishing structure 120. Along the direction of the bimetallic structure 160 towards the arc-extinguishing structure 120, the projection of the end of the insulating component 170 near the operating mechanism 150 is outside the projection range of the arc-extinguishing structure 120. This reduces the possibility of breakdown between the stationary contact 113 and the bimetallic structure 160 during the use of the circuit breaker 100, improves the breaking capacity of the circuit breaker 100, and ensures the reliability of the circuit breaker 100.

[0095] Based on the circuit breaker 100 provided in the example above, please refer to... Figure 7 and Figure 8 The insulating component 170 includes an insulating body 171 and a bent portion 172 arranged at an angle. The insulating body 171 is located on the side of the double metal structure 160 facing the arc-arranging structure 120, and the bent portion 172 is located on the side of the double metal structure 160 facing the operating mechanism 150.

[0096] The insulating body 171 and the bent portion 172 cooperate to form a non-zero included angle. The non-zero included angle formed by the insulating body 171 and the bent portion 172 can be an acute angle, a right angle or an obtuse angle. This application example does not make specific limitations on this.

[0097] The insulating body 171 can completely cover the side of the bimetallic structure 160 facing the arc-quenching structure 120, or the insulating body 171 can only block the part of the bimetallic structure 160 near the opening of the arc-quenching channel 122. This application example does not impose specific limitations on this.

[0098] The bent portion 172 and the insulating body 171 can be integrally formed, or the bent portion 172 and the insulating body 171 can be spaced apart. This application example does not impose specific limitations on this.

[0099] In this example, the insulating body 171 is located on the side of the bimetallic structure 160 facing the arc-quenching structure 120, and the bent portion 172 is located on the side of the bimetallic structure 160 facing the operating mechanism 150. Therefore, the insulating body 171 and the bent portion 172 can cooperate to protect the bimetallic structure 160 from different directions, improve the breaking capacity of the circuit breaker 100, reduce the possibility of breakdown between the stationary contact 113 inside the arc-quenching structure 120 and the bimetallic structure 160 during the use of the circuit breaker 100, and ensure the reliability of the circuit breaker 100.

[0100] Based on the circuit breaker 100 provided in the example above, please refer to... Figure 7 and Figure 8 The circuit breaker 100 also includes a housing 180, and an insulating member 170 is disposed in the housing 180. Alternatively, the insulating member is fixedly connected to a bimetallic structure 160 (not shown in the figure).

[0101] The housing 180 is made of insulating material, such as polyvinyl chloride or polycarbonate (also known as PC plastic). The housing 180 made of insulating material can reduce the possibility of current escaping from the housing 180 to the outside, ensuring the safety of the circuit breaker 100.

[0102] The housing 180 has a mounting cavity, and structures such as the arc extinguishing mechanism, contact mechanism 110, and operating mechanism 150 are installed in the housing 180. The housing 180 has an arc outlet, which is connected to the arc extinguishing channel 122, so that the electric arc inside the arc extinguishing channel 122 can be discharged from the arc outlet to the outside of the circuit breaker 100, reducing or even avoiding the possibility of the electric arc accumulating inside the arc extinguishing channel 122, and ensuring the reliability of the circuit breaker 100.

[0103] The insulating component 170 can be integrally formed with the housing 180, and the insulating component 170 can also be connected to the housing 180 by means of plug-in, threaded connection or other means.

[0104] The insulating component 170 can also be fixedly connected to the bimetallic structure 160 by means of fusion bonding or other methods. The insulating component 170 can also be sleeved on the bimetallic structure 160. This application example does not make specific limitations in this regard.

[0105] In this application example, whether the insulating element 170 is located in the housing 180 or is fixedly connected to the bimetallic structure 160, at least part of the insulating element 170 can be located between the bimetallic structure 160 and the arc breaker. During the use of the circuit breaker 100, the possibility of breakdown between the stationary contact 113 in the arc breaker structure 120 and the bimetallic structure 160 is reduced, thereby improving the breaking capacity of the circuit breaker 100 and ensuring the reliability of the circuit breaker 100.

[0106] Finally, it should be noted that the above embodiments are merely specific implementations of this application, but the scope of protection of this application is not limited thereto. Any changes or substitutions within the technical scope disclosed in this application should be covered within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A circuit breaker characterized by, include: Contact mechanism; The arc-discharging structure includes an arc-discharging channel, which is connected to the external space of the circuit breaker, and at least a portion of the contact mechanism is installed in the arc-discharging channel. The cable outlet plate is spaced apart from the arc-arranging structure, and the cable outlet plate is electrically connected to the contact mechanism via a flexible connection; The arc-arc structure has a clearance groove on the side near the flexible connection.

2. The circuit breaker of claim 1, wherein, The arc-arranging structure includes a first arc-blocking plate and a second arc-blocking plate, which cooperate to form the arc-arranging channel; The flexible connection includes a first flexible connection and a second flexible connection. One end of the first flexible connection is connected to the contact mechanism, and the other end of the first flexible connection is connected to the outlet plate. The first flexible connection is located close to the first arc-blocking plate. The circuit breaker also includes a double metal structure, which is disposed on the side of the second arc-blocking plate away from the first arc-blocking plate. The double metal structure is electrically connected between the contact mechanism and the outlet plate. One end of the second flexible connection is connected to the contact mechanism, and the other end of the second flexible connection is electrically connected to the outlet plate through the double metal structure. Part of the second flexible connection is disposed on the side of the second arc-blocking plate away from the first arc-blocking plate. Wherein, the first arc-blocking plate is provided with the relief groove, and / or the second arc-blocking plate is provided with the relief groove.

3. The circuit breaker of claim 1 or 2, wherein, The clearance groove is an arc-shaped groove or a rectangular groove.

4. The circuit breaker of claim 2, wherein, The contact mechanism includes a cooperating moving contact and a stationary contact. The stationary contact is fixedly installed in the arc-discharging channel. The moving contact is rotatable relative to the stationary contact. Part of the moving contact extends into the arc-discharging channel, and the moving contact located in the arc-discharging channel can contact the stationary contact. The part of the moving contact located outside the arc-discharging channel is provided with a first arc-blocking plate, and the first arc-blocking plate is located on the side of the moving contact close to the stationary contact. The circuit breaker also includes an operating mechanism connected to the moving contact. The first arc-blocking plate is disposed between the arc-dissipating channel and the operating mechanism, and the first arc-blocking plate partially blocks the opening of the arc-dissipating channel facing the operating mechanism.

5. The circuit breaker of claim 4, wherein, The moving contact includes a cooperating contact support and a moving contact body. The contact support is located outside the arc-discharging channel, a portion of the moving contact body extends into the arc-discharging channel, and a portion of the moving contact located within the arc-discharging channel can contact the stationary contact. The first arc-blocking plate is located on the side of the contact support near the stationary contact.

6. The circuit breaker of claim 5, wherein, The first arc-blocking plate includes an arc-blocking body and a connecting portion arranged at an angle. The arc-blocking body is disposed on the contact support and extends toward the stationary contact. One end of the connecting portion is connected to the end of the arc-blocking body near the stationary contact, and the other end of the connecting portion is connected to the contact support.

7. The circuit breaker of claim 4, wherein, A second arc-blocking plate is provided on the side of the first arc-blocking plate facing the second arc-blocking plate, and a third arc-blocking plate is provided on the side of the second arc-blocking plate facing the first arc-blocking plate. The third arc-blocking plate and the second arc-blocking plate are spaced apart, and both the second arc-blocking plate and the third arc-blocking plate are located at the opening.

8. The circuit breaker of claim 4, wherein, An insulating element is provided between the double-metal structure and the arc-arc structure. Along the direction from the double-metal structure to the arc-arc structure, the projection of the end of the insulating element near the operating mechanism is outside the projection range of the arc-arc structure.

9. The circuit breaker of claim 8, wherein, The insulating component includes an insulating body and a bent portion arranged at an angle. The insulating body is located on the side of the bimetallic structure facing the arc-shaped structure, and the bent portion is located on the side of the bimetallic structure facing the operating mechanism.

10. The circuit breaker of claim 8 or 9, wherein, It also includes a housing, wherein the insulating element is disposed on the housing; or, the insulating element is fixedly connected to the bimetallic structure.

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