Static contact assembly and circuit breaker

Abstract

The utility model provides a static contact assembly and a circuit breaker, and relates to the technical field of electronic components. The static contact assembly is applied to the circuit breaker, the circuit breaker comprises a moving contact, the moving contact can be in contact with the static contact assembly, and the static contact assembly comprises a static contact body and a protection structure. The static contact body comprises a static contact plate and a static contact which are connected, the static contact can be in contact with the moving contact, and the static contact plate is provided with at least one first connecting part. The protection structure comprises a protection part and at least one second connecting part, the second connecting parts are arranged on the side, facing the static contact plate, of the protection part, the second connecting parts and the first connecting parts are in one-to-one correspondence, and the protection part shields at least part of the static contact plate and exposes the static contact. According to the static contact assembly provided by the embodiment of the invention, the breaking capacity of the circuit breaker can be improved, and then the one-time passing rate of a breaking test of the circuit breaker is ensured.

Description

Technical Field

[0001] This application relates to the technical field of electronic components, and particularly to a static contact assembly and a circuit breaker. Background Art

[0002] A circuit breaker is an electronic component that can interrupt a circuit and provide safety protection for the circuit. Therefore, the breaking function of the circuit breaker is crucial for its performance. To ensure the performance of the circuit breaker, a breaking test needs to be carried out before the circuit breaker leaves the factory.

[0003] With the standardized development of circuit breakers, there are higher requirements for the one-time passing rate of the circuit breaker breaking test. Based on the structure of the existing static contact, the one-time passing rate of the circuit breaker breaking test may be affected. Summary of the Utility Model

[0004] This application provides a static contact assembly and a circuit breaker to improve the breaking ability of the circuit breaker, thereby ensuring the one-time passing rate of the circuit breaker breaking test.

[0005] In a first aspect, this application provides a static contact assembly. The static contact assembly is applied to a circuit breaker, and the circuit breaker includes a moving contact that can contact the static contact assembly. The static contact assembly includes a static contact body and a protection structure. The static contact body includes a static contact plate and a static contact point that are connected. The static contact point can contact the moving contact, and the static contact plate is provided with at least one first connection portion. The protection structure includes a protection portion and at least one second connection portion. The second connection portion is provided on the side of the protection portion facing the static contact plate, and the second connection portion corresponds to the first connection portion one by one. The protection portion shields at least part of the static contact plate and exposes the static contact point.

[0006] Since the first connection portion is provided on the static contact plate and the second connection portion is provided on the protection structure, the cooperation between the static contact plate and the protection structure can be realized through the cooperation of the first connection portion and the second connection plate, ensuring the connection reliability between the static contact plate and the protection portion.

[0007] During the separation process of the moving contact and the static contact assembly, an arc will be generated. Since at least part of the protection portion is provided between the moving contact and the static contact plate, and the protection portion can shield at least part of the static contact plate and expose the static contact point, the protection portion can provide physical protection for the static contact plate, reducing the possibility of the static contact plate being burned by the arc.

[0008] In addition, after the separation process of the moving contact and the static contact point, the protection portion can increase the electrical clearance and creepage distance between the static contact point and the moving contact. During the breaking test of the circuit breaker, the arc extinguishing efficiency between the moving contact and the static contact can be improved, thereby increasing the one-time passing rate of the breaking test.

[0009] In some possible implementations, the protection part includes a protection plate and at least one protection protrusion. The protection plate shields the side of the static contact plate facing the static contact point, and the static contact point is exposed. At least one protection protrusion is connected to the protection plate, and the protection protrusion shields the side wall of the static contact plate.

[0010] Based on the above, the second connection part is arranged on the side of the protection plate facing the static contact plate. The static contact plate is provided with a first connection part. Through the cooperation of the first connection part and the second connection part, the cooperation between the static contact plate and the protection plate can be realized. Since the protection plate is a part of the protection structure, through the cooperation of the first connection part and the second connection part, the cooperation between the protection structure and the static contact plate can be realized.

[0011] Since the protection plate is arranged between the moving contact and the static contact plate, the protection plate can physically protect the static contact plate, reducing the possibility that the side of the bottom wall of the static contact plate facing away from the base is burned by the arc, so as to extend the service life of the static contact plate.

[0012] Because the protection plate is arranged between the static contact plate and the moving contact, after the moving contact and the static contact assembly are separated, the protection plate can extend the electrical clearance and creepage distance between the moving contact and the static contact assembly. During the breaking test of the circuit breaker, the arc extinguishing efficiency between the moving contact and the static contact can be improved, and thus the one-time passing rate of the breaking test can be improved.

[0013] In addition, since the protection protrusion cooperates with the side wall of the static contact plate, it can protect the static contact plate in a direction different from that of the protection plate, further reducing the possibility that the static contact plate is burned by the arc.

[0014] In some possible implementations, the static contact plate includes a mutually cooperating static contact plate body and an extension part. The static contact plate body is provided with a receiving groove, the extension part is arranged in the receiving groove, and the extension part is provided with a static contact point. The protection protrusion includes a cooperating protrusion, and at least part of the cooperating protrusion extends into the receiving groove and cooperates with the groove wall of the receiving groove.

[0015] The extension part can provide an installation carrier for the static contact point. The cooperating protrusion can extend into the receiving groove and cooperate with the groove wall of the receiving groove. Since the receiving groove is arranged in the static contact plate body, the static contact plate body is a part of the static contact plate, the cooperating protrusion is a part of the protection protrusion, and the protection protrusion is a part of the protection structure, through the cooperation between the cooperating protrusion and the groove wall of the receiving groove, the cooperation between the static contact plate and the protection structure can be realized.

[0016] On the basis of the cooperation between the first connection part and the second connection part, the cooperation between the cooperating protrusion and the groove wall of the receiving groove can further ensure the cooperation reliability between the static contact plate and the protection structure, and reduce the amplitude of the protection structure shaking relative to the static contact plate.

[0017] In some possible implementations, the protection structure further includes a first side plate and a second side plate that are spaced apart. Both the first side plate and the second side plate are disposed on the side of the protection plate away from the static contact plate, and the rotation trajectory of at least part of the moving contact is located between the first side plate and the second side plate.

[0018] Since the rotation trajectory of at least part of the moving contact is located between the first side plate and the second side plate, at least part of the arc generated between the moving contact and the static contact assembly is located between the first side plate and the second side plate. The first side plate and the second side plate can cooperate to form a gas-gathering structure to define the movement path of the arc and reduce the possibility of the arc randomly moving inside the circuit breaker, thereby reducing the possibility of the arc burning other structures inside the circuit breaker.

[0019] In some possible implementations, the first side plate includes a first sub-plate and a second sub-plate that are connected. The second sub-plate is disposed farther from the protection plate than the first sub-plate. The second side plate includes a third sub-plate and a fourth sub-plate that are connected. The fourth sub-plate is disposed farther from the protection plate than the third sub-plate. The distance between the first sub-plate and the third sub-plate is a first distance, and the distance between the second sub-plate and the fourth sub-plate is a second distance, and the second distance is greater than the first distance.

[0020] During the separation process of the moving contact and the static contact assembly, an arc will be generated between the moving contact and the static contact. The arc is a high-temperature and high-brightness plasma, and thus the arc can make the temperature of the moving contact relatively high. Therefore, during the movement of the arc, the arc and the moving contact are likely to burn the first side plate and the second side plate, resulting in deformation of the first side plate and the second side plate, and further narrowing the distance between the first side plate and the second side plate, affecting the use reliability of the moving contact. Since the moving contact moves in a direction away from the protection plate and finally separates from the static contact assembly, and the second sub-plate is disposed away from the protection plate compared with the first sub-plate, and the fourth sub-plate is disposed away from the protection plate compared with the third sub-plate, the second sub-plate and the fourth sub-plate are more likely to be affected by the moving contact and the arc and deform. In the example of the present application, by setting the second distance to be greater than the first distance, the possibility that the deformation of the second sub-plate and the fourth sub-plate affects the movement of the moving contact can be reduced.

[0021] In some possible implementations, the protection structure further includes a first reinforcing plate and / or a second reinforcing plate. The first reinforcing plate connects the first side plate and the protection plate. The second reinforcing plate connects the second side plate and the protection plate.

[0022] In the example of the present application, by connecting the first side plate and the protection plate with the first reinforcing plate, the amplitude of the first side plate shaking relative to the protection plate can be reduced, and further the possibility of the first side plate deforming can be reduced or even avoided. By connecting the second side plate and the protection plate with the second reinforcing plate, the amplitude of the second side plate shaking relative to the protection plate can be reduced, and further the possibility of the second side plate deforming can be reduced or even avoided.

[0023] In some possible implementations, the static contact assembly further includes a wiring board, and the wiring board is connected to one end of the static contact plate facing away from the static contact through a third connecting portion. The protection structure further includes a shielding portion, and the shielding portion is connected to the protection portion, and at least a part of the shielding portion shields the side of the third connecting portion facing the static contact plate.

[0024] Since the wiring board is a conductive component and the wiring board is connected to the static contact plate. During the use of the circuit breaker, the arc may move to the wiring board. Since at least a part of the shielding portion shields the side of the third connecting portion facing the static contact plate, the shielding portion can physically protect the third connecting portion, reducing the possibility of the arc moving to the third connecting portion and the wiring board, ensuring the arc extinguishing efficiency of the circuit breaker, and further increasing the electrical clearance and creepage distance between the moving contact and the static contact assembly, further ensuring the arc extinguishing efficiency of the circuit breaker and ensuring the one-time passing rate of the circuit breaker breaking test.

[0025] In a second aspect, the present application provides a circuit breaker, which includes a base, a moving contact, and the static contact assembly mentioned in the various possible designs of the first aspect above. The moving contact is movably connected to the base, the static contact assembly is fixedly connected to the base, and the moving contact is movable relative to the static contact assembly.

[0026] In some possible implementations, the base includes a partition, and the partition is provided with a relief groove. The moving contact is movable relative to the relief groove and can contact the static contact assembly, and the protection structure in the static contact assembly is connected to the partition.

[0027] The partition can divide the space inside the base, making the structure inside the base more compactly assembled. The relief groove can provide a moving space for the moving contact, facilitating the movement of the moving contact relative to the static contact assembly. And the partition can cooperate with the protection structure to reduce the amplitude of the protection structure shaking relative to the base, ensuring the connection reliability between the protection structure and the base.

[0028] In some possible implementations, a first connecting protrusion is provided on the side of the partition facing the protection structure, and the first connecting protrusion abuts against the protection structure. A second connecting protrusion is provided on the side of the protection structure facing the partition, and the second connecting protrusion abuts against the partition.

[0029] By providing the first connecting protrusion, the thickness of the partition can be increased, and further, the amplitude of the partition deforming due to the influence of the arc can be reduced, or the possibility of the partition deforming due to the influence of the arc can be reduced.

[0030] On this basis, the second connecting protrusion cooperates with the first connecting protrusion. When the first connecting protrusion deforms due to the electric arc, the second connecting protrusion can cooperate with the first connecting protrusion to improve the strength of the first connecting protrusion, thereby further reducing the amplitude of deformation of the partition caused by the influence of the electric arc or reducing the possibility of deformation of the partition caused by the influence of the electric arc.

[0031] For what is provided in the above second aspect and each possible design of the above second aspect, the beneficial effects can refer to the beneficial effects brought by the above first aspect and each possible implementation manner of the first aspect, which will not be elaborated here. Description of the Drawings

[0032] Figure 1 Schematic diagram of the internal structure of a circuit breaker provided by an example of the present application.

[0033] Figure 2 is Figure 1 Partial enlarged schematic diagram at A in

[0034] Figure 3 Schematic diagram of the structure of a static contact body provided by an example of the present application.

[0035] Figure 4 Schematic diagram of the structure of a first perspective of a protection structure provided by an example of the present application.

[0036] Figure 5 is Figure 1 Cross-sectional view along A-A in

[0037] Figure 6 is Figure 5 Partial enlarged schematic diagram at B in

[0038] Figure 7 is Figure 1 Cross-sectional view along B-B in

[0039] Figure 8 is Figure 7 Partial enlarged schematic diagram at C in

[0040] Figure 9 Schematic diagram of the structure of a second perspective of a protection structure provided by an example of the present application.

[0041] Description of the Reference Numerals:

[0042] 100. Base; 110. Partition board; 111. First connecting protrusion; 200. Fixed contact assembly; 210. Fixed contact body; 211. Fixed contact plate body; 212. Accommodating groove; 213. Extension part; 214. Arc ignition part; 215. Third connecting part; 216. Wiring board; 217. Fixed contact point; 218. Fourth connecting part; 220. Protection structure; 221. Protection plate; 222. Second connecting part; 223. Protection protrusion; 2231. Matching protrusion; 224. First side plate; 2241. First sub-board; 2242. Second sub-board; 225. Second side plate; 2251. Third sub-board; 2252. Fourth sub-board; 226. First reinforcing plate; 227. Shielding part; 228. Second reinforcing plate; 229. Second connecting protrusion. Detailed implementation manners

[0043] To make the purposes, technical solutions and advantages of the examples of this application clearer, the technical solutions in the examples of this application will be clearly and completely described below in conjunction with the accompanying drawings in the examples of this application. Obviously, the described examples are part of the examples of this application, rather than all of the examples. Based on the examples in this application, all other examples obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of this application.

[0044] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this application belongs; the terms used in the description of the examples in this application are only for the purpose of describing specific examples and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the description and claims of this application and the drawings are intended to cover non-exclusive inclusion.

[0045] Referring to "example" herein means that the specific features, structures or characteristics described in connection with the example can be included in at least one example of this application. The phrase "example" appearing in various places in the description is not necessarily referring to the same example, nor is it an independent or alternative example mutually exclusive with other examples. Those skilled in the art explicitly and implicitly understand that the examples described herein can be combined with other examples.

[0046] The term "and / or" herein is merely a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: the existence of A, the simultaneous existence of A and B, and the existence of B. In addition, the character " / " herein generally represents an "or" relationship between the associated objects before and after.

[0047] The orientation terms appearing in the following description are all the directions shown in the figures, and do not limit the specific structures of the fixed contact assembly and the circuit breaker of this application.

[0048] In addition, terms such as "first" and "second" in the description and claims of this application or in the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order, and may explicitly or implicitly include one or more of such features.

[0049] In the description of this application, unless otherwise specified, the meaning of "a plurality" refers to two or more (including two). Similarly, "a plurality of groups" refers to two or more groups (including two groups).

[0050] In the description of this application, it should be noted that unless otherwise clearly specified and limited, the terms "installed", "connected", and "coupled" should be understood in a broad sense. For example, the "connection" or "coupling" of mechanical structures may refer to a physical connection. For example, a physical connection may be a fixed connection, such as a fixed connection through a spacer, such as a fixed connection through screws, bolts or other spacers; a physical connection may also be a detachable connection, such as a snap connection or a snap-fit connection; a physical connection may also be an integral connection, such as a connection formed by welding, bonding or integral molding. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0051] A circuit breaker is an electronic component that can interrupt a circuit and provide safety protection for the circuit. Therefore, the interrupting function of the circuit breaker is crucial for the performance of the circuit breaker. To ensure the performance of the circuit breaker, an interrupting test needs to be carried out before the circuit breaker leaves the factory.

[0052] With the standardized development of circuit breakers, there are higher requirements for the first-pass rate of the interrupting test of circuit breakers. Based on the existing structure of the static contact, there is no protection for the static contact, or the protection for the static contact is insufficient, resulting in a low first-pass rate of the interrupting test of the circuit breaker during the interrupting test.

[0053] Based on the above, this application example provides a static contact assembly and a circuit breaker.

[0054] In order to enable those skilled in the art to better understand the solution of this application, the static contact assembly and the circuit breaker provided in this application example will be clearly and completely described below with reference to the drawings.

[0055] Exemplarily, this application example provides a circuit breaker. Figure 1 It is a schematic diagram of the internal structure of a circuit breaker provided in this application example. Figure 2 For Figure 1 the partial enlarged schematic diagram at A in Figure 1 please refer to Figure 2The circuit breaker may include a base 100, a moving contact and a stationary contact assembly 200. The moving contact is movably connected to the base 100, the stationary contact assembly 200 is fixedly connected to the base 100, and the moving contact is movable relative to the stationary contact assembly 200.

[0056] The base 100 may be made of insulating material, such as polyamide (also known as PA plastic).

[0057] The base 100 made of insulating material can reduce the possibility of leakage of current inside the base 100 and ensure the safety of the circuit breaker.

[0058] The base 100 may be provided with a receiving cavity, and the moving contact and the stationary contact assembly 200 may be installed in the installation cavity.

[0059] The circuit breaker may include at least one set of matching moving contact and stationary contact assemblies 200 .

[0060] The stationary contact assembly 200 is fixedly connected to the accommodating cavity, and the moving contact can be rotatably connected to the accommodating cavity, or the moving contact can be slidably connected to the accommodating cavity. The example of this application does not limit the way in which the stationary contact assembly 200 is connected to the accommodating cavity, and the specific way in which the moving contact is connected to the accommodating cavity, as long as the moving contact can move to a position in contact with the stationary contact assembly 200, and the moving contact can move to a position separated from the stationary contact assembly 200.

[0061] The moving contact may contact a side of the stationary contact assembly 200 facing away from the bottom wall of the base 100 .

[0062] When the moving contact is in contact with the stationary contact assembly 200, the circuit breaker is in a closed state, the circuit is in a connected state, and current flows through the circuit. When the moving contact is separated from the stationary contact assembly 200, the circuit breaker is in an open state, the circuit is in a disconnected state, and no current flows through the circuit.

[0063] The specific structure of the moving contact may be the same as that of the moving contact in the prior art. The specific structure of the stationary contact assembly 200 is described in detail below.

[0064] Based on the above, the base 100 can provide a mounting carrier for the moving contact, the static contact assembly 200 and other structural parts. According to the working state of the circuit, the contact state between the moving contact of the circuit breaker and the static contact assembly 200 can be changed to protect the circuit and reduce the possibility of further expansion of the circuit fault.

[0065] Based on the circuit breaker provided in the above example, please refer to Figure 1 and Figure 2The base 100 may include a partition 110 , the partition 110 is provided with a clearance groove, the moving contact is movable relative to the clearance groove and can contact the stationary contact assembly 200 , and the protective structure 220 in the stationary contact assembly 200 is connected to the partition 110 .

[0066] The rotation center of the moving contact may be located on the side of the partition 110 away from the stationary contact assembly 200 . Based on this, part of the moving contact can move relative to the clearance slot to switch the contact state with the stationary contact assembly 200 .

[0067] The side of the protective structure 220 facing the partition 110 may abut against the partition 110. Alternatively, a groove may be provided on the side of the partition 110 facing the protective structure 220, and part of the protective structure 220 may extend into the groove. Alternatively, a groove may be provided on the side of the partition 110 facing the protective structure 220, and a protrusion may be provided on the side of the protective structure 220 facing the groove, and the protrusion may extend into the groove. The protective structure 220 and the partition 110 may also be connected in other ways, and this application example does not specifically limit this.

[0068] In the example of the present application, the partition 110 can divide the space inside the base 100, so that the structure inside the base 100 can be assembled more compactly. The clearance groove can provide a movable space for the moving contact, which is convenient for the moving contact to move relative to the static contact assembly 200. In addition, the partition 110 can cooperate with the protective structure 220 to reduce the amplitude of the shaking of the protective structure 220 relative to the base 100, thereby ensuring the connection reliability between the protective structure 220 and the base 100.

[0069] Based on the circuit breaker provided in the above example, please refer to Figure 2 A first connection protrusion 111 is provided on one side of the partition 110 facing the protective structure 220 , and the first connection protrusion 111 abuts against the protective structure 220 . A second connection protrusion 229 is provided on one side of the protective structure 220 facing the partition 110 , and the second connection protrusion 229 abuts against the partition 110 .

[0070] Two first connection protrusions 111 may be arranged at intervals, and the two first connection protrusions 111 may be arranged on both sides of the clearance groove, and the two first connection protrusions 111 are arranged on the side of the partition 110 facing the static contact assembly 200. Two second connection protrusions 229 may be arranged correspondingly, and the arrangement position of the second connection protrusion corresponds to the arrangement position of the first connection protrusion 111.

[0071] Taking a first connection protrusion 111 disposed on one side of the clearance groove as an example, the second connection protrusion 229 matched with the first connection protrusion 111 can be disposed on a side of the first connection protrusion 111 away from the clearance groove.

[0072] The first connecting protrusion 111 and the second connecting protrusion 229 can be arranged staggeredly. Exemplarily, one side of the first connecting protrusion 111 facing the protection structure 220 can abut against the protection structure 220, and one side of the second connecting protrusion 229 facing the partition 110 can abut against the partition 110. Based on this, the first connecting protrusion 111 and the second connecting protrusion 229 can be substantially parallel.

[0073] A gap can be formed between the first connecting protrusion 111 and the second connecting protrusion 229, and the first connecting protrusion 111 and the second connecting protrusion 229 can also be in contact. The specific implementation manners of the first connecting protrusion 111 and the second connecting protrusion 229 are not limited in the examples of this application.

[0074] In the examples of this application, by providing the first connecting protrusion 111, the thickness of the partition 110 can be increased, and thus the degree of deformation of the partition 110 caused by the influence of the electric arc can be reduced, or the possibility of the partition 110 being deformed due to the influence of the electric arc can be reduced.

[0075] On this basis, the second connecting protrusion 229 cooperates with the first connecting protrusion 111. When the first connecting protrusion 111 deforms due to the electric arc, the second connecting protrusion 229 can cooperate with the first connecting protrusion 111 to improve the strength of the first connecting protrusion 111, and thus the degree of deformation of the partition 110 caused by the influence of the electric arc can be further reduced, or the possibility of the partition 110 being deformed due to the influence of the electric arc can be reduced.

[0076] Next, the specific structure of the static contact assembly 200 will be described in detail.

[0077] Exemplarily, this application provides a static contact assembly 200. Figure 3 It is a schematic structural diagram of a static contact body provided by the examples of this application. Figure 4 It is a schematic structural diagram of a first perspective of a protection structure provided by the examples of this application. Figure 5 It is Figure 1 the sectional view along A-A in Figure 6 It is Figure 5 the partial enlarged schematic diagram at B in

[0078] Please refer to Figures 2 to 6, the static contact assembly 200 may include a static contact body 210 and a protection structure 220. The static contact body 210 may include a static contact plate and a static contact point 217 connected to each other. The static contact point 217 can contact the moving contact, and the static contact plate may be provided with at least one first connection portion. The protection structure 220 may include a protection portion and at least one second connection portion 222. The second connection portion 222 is disposed on a side of the protection portion facing the static contact plate. The second connection portion 222 corresponds to the first connection portion one by one. At least part of the protection portion is disposed between the moving contact and the static contact plate. The protection portion shields at least part of the static contact plate and exposes the static contact point 217.

[0079] The static contact plate may be generally in a plate-like structure, and the static contact plate may also be provided with structures such as grooves and protrusions.

[0080] The static contact plate may be made of copper and copper alloys or other materials with relatively good electrical conductivity. The specific implementation manner of the static contact plate in this application is not limited. The static contact point 217 may be fixedly connected to the static contact plate by welding or other means.

[0081] The protection structure 220 may be made of a high-temperature flame-retardant material, for example, nylon. Of course, the protection structure 220 may also be made of other high-temperature flame-retardant materials.

[0082] The first connection portion and the second connection portion 222 may have various implementation manners.

[0083] In some possible implementation manners, only one first connection portion may be provided, or multiple first connection portions may be provided at intervals. The number of the second connection portions 222 is equal to the number of the first connection portions, and the second connection portions 222 correspond to the first connection portions one by one.

[0084] The first connection portion may be a plane where the static contact plate cooperates with the second connection structure, or the first connection portion may be a protrusion structure or a groove structure.

[0085] The second connection portion 222 may be a hook structure. When the first connection portion is a protrusion structure, the second connection portion 222 may be a groove structure. When the first connection portion is a groove structure, the second connection portion 222 may be a protrusion structure.

[0086] In some possible implementation manners, the number of the second connection portions 222 may also be different from the number of the first connection portions.

[0087] Exemplarily, the first connection portion may be a groove-like structure, multiple second connection portions 222 may be provided at intervals, the second connection portion 222 may be a hook structure or a protrusion structure, and multiple hook structures or protrusion structures may extend into the groove-like structure to cooperate with the groove-like structure.

[0088] Exemplarily, a plurality of first connection parts may be provided at intervals, and the first connection part is a convex structure or a hook structure. One second connection part 222 may be provided, and the second connection part 222 may be a groove provided in the protection part.

[0089] Regardless of whether the number of the first connection parts is equal to the number of the second connection parts 222, the set position of the first connection part may be different according to different implementation manners of the first connection part and the second connection part 222.

[0090] For example, in the case where the second connection part 222 is a hook structure, the first connection part may be the plane of the static contact plate facing away from the protection part.

[0091] In the case where the second connection part 222 is a convex structure, the first connection part may be a groove structure of the static contact plate facing the protection plate 221.

[0092] The present application does not limit the specific implementation manners of the first connection part and the second connection part 222, as long as it is ensured that the cooperation between the first connection part and the second connection part 222 can realize the cooperation between the static contact plate and the protection structure 220.

[0093] The protection part may be generally in a plate-like structure, or the protection part may be formed by the cooperation of a plurality of plate-like structures.

[0094] At least part of the protection part may be provided on one side of the static contact plate facing away from the bottom wall of the base 100. The protection part may block part of the side of the static contact plate facing away from the bottom wall of the base 100, or the protection part may completely block the side of the static contact plate facing away from the bottom wall of the base 100, as long as it is ensured that the static contact point 217 is not blocked by the protection part and the static contact point 217 can cooperate with the moving contact.

[0095] During the separation process of the moving contact and the static contact assembly 200, an arc will be generated between the moving contact and the static contact assembly 200. Since the moving contact is movably connected to the base 100, the moving contact contacts the static contact assembly 200 on the side of the static contact plate facing away from the base 100, and at least part of the protection part is provided on one side of the static contact plate facing away from the bottom wall of the base 100. The protection part can physically isolate the static contact plate, reduce the possibility of the static contact plate being burned by the arc, increase the electrical clearance and creepage distance between the moving contact and the static contact assembly 200, and thus improve the arc extinguishing efficiency of the circuit breaker.

[0096] On the basis that at least part of the protection part is provided on the bottom wall of the static contact plate facing away from the base 100, part of the protection part may block the side wall of the static contact plate. The present application does not limit the specific implementation manner of the protection part.

[0097] Based on the above, since the first connection part is provided on the stationary touch plate and the second connection part 222 is provided on the protective structure 220, the stationary touch plate and the protective structure 220 can be matched through the cooperation of the first connection part and the second connection plate, thereby ensuring the connection reliability between the stationary touch plate and the protective part.

[0098] An arc will be generated during the separation process of the moving contact and the stationary contact assembly 200. Since at least part of the protective part is arranged between the moving contact and the stationary contact plate, and the protective part can cover at least part of the stationary contact plate and expose the stationary contact point 217, the protective part can provide physical protection for the stationary contact plate and reduce the possibility of the stationary contact plate being burned by the arc.

[0099] In addition, after the separation process of the moving contact and the static contact 217, the protective part can increase the electrical clearance and creepage distance between the static contact 217 and the moving contact. During the breaking test of the circuit breaker, the arc extinguishing efficiency between the moving contact and the static contact can be improved, thereby improving the one-time pass rate of the breaking test.

[0100] Based on the static contact assembly 200 provided in the above example, please refer to Figure 4 The protection part may include a protection plate 221 and at least one protection protrusion 223. The protection plate 221 is disposed between the moving contact and the stationary contact plate, the protection plate 221 shields at least part of the stationary contact plate and exposes the stationary contact point 217, and a second connection part 222 is disposed on the side of the protection plate 221 facing the stationary contact plate. At least one protection protrusion 223 is connected to the protection plate 221, and the protection protrusion 223 shields the side wall of the stationary contact plate.

[0101] The shape of the protective plate 221 can be similar to that of the static touch plate. On the premise that the protective plate 221 exposes the static contact point 217, the protective plate 221 can cover a portion 227 of the static touch plate away from the bottom wall of the base 100, and the protective plate 221 can also completely cover the side of the static touch plate away from the bottom wall of the base 100.

[0102] The protective protrusion 223 can be connected to the protective plate 221, and the protective protrusion 223 is provided on the side of the protective plate 221 facing the static touch plate. When the protective structure 220 cooperates with the static touch plate, the protective protrusion 223 can block the side wall of the static touch plate. The side wall of the static touch plate may include the outer side wall of the static touch plate and the inner side wall of the static touch plate. The outer side wall of the static touch plate may refer to the wall of the static touch plate facing the side wall of the base 100. In the case where the static touch plate is provided with a groove-like structure, the inner side wall of the static touch plate refers to the groove wall of the groove-like structure. The protective protrusion 223 may block at least one side wall of the static touch plate, and the protective protrusion 223 may also block multiple side walls of the static touch plate at the same time. The example of this application does not specifically limit the side wall blocked by the protective protrusion 223.

[0103] Based on the above, the second connecting portion 222 is provided on the side of the protective plate 221 facing the static contact plate. The static contact plate is provided with a first connecting portion. Through the cooperation of the first connecting portion and the second connecting portion 222, the cooperation between the static contact plate and the protective plate 221 can be achieved. Since the protective plate 221 is a part of the protection structure 220, therefore, through the cooperation of the first connecting portion and the second connecting portion 222, the cooperation between the protection structure 220 and the static contact plate can be achieved.

[0104] Since the protective plate 221 is arranged between the moving contact and the static contact plate, the protective plate 221 can physically protect the static contact plate, reducing the possibility that the side of the static contact plate facing away from the bottom wall of the base 100 is burned by the arc, so as to extend the service life of the static contact plate.

[0105] Because the protective plate 221 is arranged between the static contact plate and the moving contact, after the moving contact is separated from the static contact assembly 200, the protective plate 221 can extend the electrical clearance and creepage distance between the moving contact and the static contact assembly 200. During the breaking test of the circuit breaker, the arc extinguishing efficiency between the moving contact and the static contact can be improved, thereby improving the one-time passing rate of the breaking test.

[0106] In addition, since the protective protrusion 223 cooperates with the side wall of the static contact plate, the static contact plate can be protected in a direction different from that of the protective plate 221, further reducing the possibility that the static contact plate is burned by the arc.

[0107] Based on the static contact structure provided in the above example, along the direction from the static contact plate to the bottom wall of the base 100, the size of the protective protrusion 223 can be different or the same.

[0108] Along the direction of the static contact plate facing the bottom wall of the base 100, setting the size of the protective protrusion 223 to be different, the smaller-sized protective protrusion 223 can reduce the material used for the protection structure 220, and the larger-sized protective protrusion 223 can increase the contact area between the protective protrusion 223 and the static contact plate, making the possibility of separation between the protective protrusion 223 and the static contact plate lower, and ensuring the cooperation reliability between the protection structure 220 and the static contact plate.

[0109] Based on the static contact assembly 200 provided in the above example, please refer to Figure 4 , in the case where the second connecting portion 222 includes two hook structures arranged at intervals, the second connecting portion 222 can be provided on the side of the protection structure 220 close to the rotation center of the moving contact, and a protective protrusion 223 can be provided between the two hook structures.

[0110] The two hook structures are arranged at intervals, so part of the static contact plate can cooperate with the moving contact to generate an arc from the gap between the two hook structures, affecting the performance of the circuit breaker. A protective protrusion 223 is arranged between the two hook structures arranged at intervals, and the protective protrusion 223 can reduce the possibility of the static contact plate cooperating with the moving contact to generate an arc from the gap between the two hook structures, thereby increasing the electrical clearance and creepage distance between the moving contact and the static contact assembly 200, further ensuring the arc extinguishing efficiency of the circuit breaker and ensuring the one-time pass rate of the circuit breaker breaking test.

[0111] Based on the static contact assembly 200 provided in the above example, please refer to Figure 3 The stationary touch plate may include a stationary touch plate body 211 and an extension portion 213 that match each other. The stationary touch plate body 211 is provided with a receiving groove 212. The extension portion 213 is provided in the receiving groove 212. The extension portion 213 is provided with a stationary contact point 217. The protective protrusion 223 includes a matching protrusion 2231. At least a part of the matching protrusion 2231 extends into the receiving groove 212 and matches with the groove wall of the receiving groove 212.

[0112] The receiving groove 212 can be arranged in the middle of the static touch plate body 211. In this case, the receiving groove 212 can be in a "mouth" shape, a "凵" shape, etc. The receiving groove 212 can also be arranged on the side of the static touch plate body 211 away from the rotation center of the moving contact. In this case, the receiving groove 212 can be in a "mouth" shape, a "凵" shape, etc. The specific configuration of the receiving groove 212 is not limited in this application example.

[0113] The extension portion 213 may be in a flat plate structure, or in an arc-shaped structure.

[0114] When the extension portion 213 is a flat plate structure, the extension portion 213 can be connected to any one of the groove walls of the accommodating groove 212, and the extension portion 213 can also be connected to multiple groove walls of the accommodating groove 212. The example of this application does not limit the specific implementation method of the extension portion 213 and the accommodating groove 212.

[0115] The mating protrusion 2231 can extend along the static touch plate toward the bottom wall of the base 100, the mating protrusion 2231 can contact the groove wall of the receiving groove 212, and there can also be a gap between the mating protrusion 2231 and the groove wall of the receiving groove 212, as long as the mating protrusion 2231 can extend into the receiving groove 212 and cooperate with the groove wall of the receiving groove 212.

[0116] In the example of the present application, the extension portion 213 can provide an installation carrier for the stationary contact 217. The mating protrusion 2231 can extend into the receiving groove 212 and cooperate with the groove wall of the receiving groove 212. Since the receiving groove 212 is provided in the stationary contact plate body 211, the stationary contact plate body 211 is a part of the stationary contact plate, the mating protrusion 2231 is a part of the protective protrusion 223, and the protective protrusion 223 is a part of the protective structure 220. Therefore, through the cooperation between the mating protrusion 2231 and the groove wall of the receiving groove 212, the cooperation between the stationary contact plate and the protective structure 220 can be achieved.

[0117] On the basis of the cooperation between the first connecting portion and the second connecting portion 222, the cooperation between the mating protrusion 2231 and the groove wall of the receiving groove 212 can further ensure the cooperation reliability between the stationary contact plate and the protective structure 220, and reduce the amplitude of the shaking of the protective structure 220 relative to the stationary contact plate.

[0118] Based on the stationary contact assembly 200 provided in the above example, please refer to Figure 3 , the arcing portion 214 can be integrally formed with the extension portion 213 and the stationary contact plate body 211. The arcing portion 214 can also be connected to the extension portion 213 and the stationary contact body through a connecting structure.

[0119] When the extension portion 213 has an arc-shaped structure, one end of the extension portion 213 can be connected to the side wall of the receiving groove 212 close to the rotation center of the moving contact, and the end of the extension portion 213 facing away from the rotation center of the moving contact can be a free end, and this free end can be bent in a direction away from the bottom wall of the base 100 to form the arcing portion 214. By providing the arcing portion 214, the efficiency of the arc entering the arc extinguishing chamber of the circuit breaker can be improved, which is beneficial to improving the arc extinguishing efficiency of the circuit breaker.

[0120] When the extension portion 213, the stationary contact plate body and the arcing portion 214 are connected through a connecting structure, the connecting structure can include a mating installation protrusion and installation groove, and the connecting structure can be other structures.

[0121] Exemplarily, the installation protrusion can be provided on the extension portion 213. When the extension portion 213 includes a free end, the installation protrusion can be provided at the free end of the installation protrusion. The installation groove can be provided on the arcing portion 214. When the arcing portion 214 cooperates with the extension portion 213, the installation protrusion can extend into the installation groove. Since the arcing portion 214 and the extension portion 213 are arranged at an angle, when the installation protrusion and the installation groove cooperate, the installation protrusion can abut against the groove wall of the installation groove, reducing the possibility of the separation between the installation protrusion and the installation groove.

[0122] Figure 7 For Figure 1 the cross-sectional view along B-B in Figure 8 For Figure 7 the partial enlarged schematic diagram at C inFigure 7 And Figure 8 The connecting structure may further include a fourth connecting portion 218. The fourth connecting portion 218 may be integrally formed with the arcing portion 214. The fourth connecting portion 218 may be connected to one side of the extending portion 213 facing the bottom wall of the base 100. The fourth connecting portion 218 may be in surface contact with the extending portion 213, increasing the contact area between the arcing portion 214 and the extending portion 213, and further improving the contact reliability between the arcing portion 214 and the extending portion 213.

[0123] The fourth connecting portion 218 may also be in surface contact with the static contact plate body 211 on the basis of being in surface contact with the extending portion 213. The present application example does not specifically limit the connection manner between the arcing portion 214, the extending portion 213, and the static contact plate body 211.

[0124] Based on the static contact head assembly 200 provided in the above example, Figure 9 This is a schematic structural view of a second perspective of a protection structure provided by an example of the present application. Please refer to Figure 4 And Figure 9 The protection structure 220 may further include a first side plate 224 and a second side plate 225 arranged at intervals. Both the first side plate 224 and the second side plate 225 are provided on the side of the protection plate 221 facing away from the static contact plate. At least part of the rotation trajectory of the moving contact head is located between the first side plate 224 and the second side plate 225.

[0125] The structure of the first side plate 224 is similar to that of the second side plate 225. Next, only the first side plate 224 will be taken as an example to describe the structures of the first side plate 224 and the second side plate 225.

[0126] The first side plate 224 and the protection plate 221 may be integrally formed, or the first side plate 224 and the protection plate 221 may also be connected together by means of the cooperation of a card slot and a hook, the cooperation of a convex column and a groove, etc.

[0127] The first side plate 224 may be substantially perpendicular to the protection plate 221. Specifically, it can be understood that the angle between the first side plate 224 and the protection plate 221 is greater than or equal to 85 degrees and less than or equal to 95 degrees. The present application example does not specifically limit this.

[0128] Based on the above, since at least part of the rotation trajectory of the moving contact head is located between the first side plate 224 and the second side plate 225, therefore, at least part of the arc generated between the moving contact head and the static contact head assembly 200 is located between the first side plate 224 and the second side plate 225. The first side plate 224 and the second side plate 225 cooperate to form a gas-gathering structure to define the movement path of the arc, reducing the possibility of the arc randomly scurrying inside the circuit breaker, and further reducing the possibility of the arc burning other structures inside the circuit breaker.

[0129] Based on the static contact assembly 200 provided in the above example, please refer to Figure 4 and Figure 9 The first side panel 224 may include a first split panel 2241 and a second split panel 2242 connected to each other, wherein the second split panel 2242 is disposed farther from the protective panel 221 than the first split panel 2241. The second side panel 225 may include a third split panel 2251 and a fourth split panel 2252 connected to each other, wherein the fourth split panel 2252 is disposed farther from the protective panel 221 than the third split panel 2251, wherein the distance between the first split panel 2241 and the third split panel 2251 is a first distance, and the distance between the second split panel 2242 and the fourth split panel 2252 is a second distance, and the second distance is greater than the first distance.

[0130] The first side plate 224 includes a first sub-plate 2241 and a second sub-plate 2242 , and the second side plate 225 includes a third sub-plate 2251 and a fourth sub-plate 2252 .

[0131] The first dividing plate 2241 may be substantially rectangular, or may be substantially L-shaped. The second dividing plate 2242 is disposed at a position away from the protective plate 221 compared to the first dividing plate 2241. The thickness of the second dividing plate 2242 may be equal to the thickness of the first dividing plate 2241, or may be different from the thickness of the first dividing plate 2241.

[0132] The third partition plate 2251 may be roughly rectangular, or the third partition plate 2251 may be roughly "L"-shaped. The fourth partition plate 2252 is disposed at a position away from the protective plate 221 compared to the third partition plate 2251. The thickness of the fourth partition plate 2252 may be equal to the thickness of the third partition plate 2251, or the thickness of the fourth partition plate 2252 may be different from the thickness of the third partition plate 2251. The example of the present application does not impose any specific restrictions on the implementation of the first side panel 224 and the second side panel 225, as long as it can be ensured that the distance between the first partition plate 2241 and the third partition plate 2251 is greater than the distance between the second partition plate 2242 and the fourth partition plate 2252, that is, the second distance is greater than the first distance.

[0133] During the separation process of the moving contact and the static contact assembly 200, an arc will be generated between the moving contact and the static contact. The arc is a high-temperature and high-brightness plasma, which makes the temperature of the moving contact relatively high. Therefore, during the movement of the arc, the arc and the moving contact are likely to cause burns to the first side plate 224 and the second side plate 225, resulting in deformation of the first side plate 224 and the second side plate 225. Furthermore, the distance between the first side plate 224 and the second side plate 225 becomes narrower, affecting the reliability of the moving contact. Since the moving contact moves in a direction away from the protection plate 221, the moving contact is finally separated from the static contact assembly 200. And the second sub-plate 2242 is arranged away from the protection plate 221 compared with the first sub-plate 2241, and the fourth sub-plate 2252 is arranged away from the protection plate 221 compared with the third sub-plate 2251. Therefore, the second sub-plate 2242 and the fourth sub-plate 2252 are more likely to be deformed under the influence of the moving contact and the arc.

[0134] In the example of the present application, by setting the second distance greater than the first distance, the possibility that the deformation of the second sub-plate 2242 and the fourth sub-plate 2252 affects the movement of the moving contact can be reduced.

[0135] Based on the static contact assembly 200 provided in the above example, please refer to Figure 4 and Figure 9 , the protection structure 220 further includes a first reinforcing plate 226 and / or a second reinforcing plate 228. The first reinforcing plate 226 connects the first side plate 224 and the protection plate 221. The second reinforcing plate 228 connects the second side plate 225 and the protection plate 221.

[0136] The protection structure 220 may include at least one of the first reinforcing plate 226 and the second reinforcing plate.

[0137] The first reinforcing plate 226 and the second reinforcing plate 228 have similar structures. In the example of the present application, only the first reinforcing plate 226 is described as an example.

[0138] The first reinforcing plate 226 may be disposed on a side of the first side plate 224 away from the second side plate 225. The first reinforcing plate 226 may be triangular. The first reinforcing plate 226, the first side plate 224, and the protection plate 221 may also cooperate to form a triangle to ensure the connection reliability between the first side plate 224 and the protection plate 221.

[0139] The first reinforcing plate 226 may be integrally formed with the first side plate 224 and the protection plate 221, or the first reinforcing plate 226 may be connected to the first side plate 224 and the protection plate 221 by means of snap connection or other connection methods.

[0140] In the example of the present application, the first side plate 224 and the protective plate 221 are connected by the first reinforcing plate 226, so that the shaking amplitude of the first side plate 224 relative to the protective plate 221 can be reduced, thereby reducing or even avoiding the possibility of deformation of the first side plate 224. The second side plate 225 and the protective plate 221 are connected by the second reinforcing plate 228, so that the shaking amplitude of the second side plate 225 relative to the protective plate 221 can be reduced, thereby reducing or even avoiding the possibility of deformation of the second side plate 225.

[0141] Based on the static contact assembly 200 provided in the above example, the static contact assembly 200 may further include a wiring board 216, and the wiring board 216 is connected to an end of the static contact plate away from the static contact point 217 through the third connection portion 215. The protective structure 220 also includes a shielding portion 227, which is connected to the protective portion, and at least a portion of the shielding portion 227 shields the side of the third connection portion 215 facing the static contact plate.

[0142] The stationary touch plate, the third connection part 215 and the wiring board 216 can be integrally formed. The wiring board 216 and the stationary touch plate can be located at different horizontal planes, and the third connection part 215 is disposed between the stationary touch plate and the wiring board 216 to connect the stationary touch plate and the wiring board 216.

[0143] The connection board 216 can be connected to the power supply line. Since the connection board 216 is connected to the static contact plate through the third connection portion 215, the electrical connection between the power supply line and the internal conductive structure of the circuit breaker can be achieved by providing the connection board 216.

[0144] The shielding portion 227 can be formed by extending the protective plate 221 along the bottom wall direction away from the base 100. The shielding portion 227 can be integrally formed with the protective portion. The shielding portion 227 can also be connected by snap connection, matching of protrusions and grooves, etc. The example of this application does not impose specific restrictions on the connection method between the shielding portion 227 and the protective portion.

[0145] In the example of the present application, the terminal block 216 is a conductive member, and the terminal block 216 is connected to the stationary contact plate. During the use of the circuit breaker, the arc may move to the terminal block 216. Since at least part of the shielding portion 227 shields the side of the third connection portion 215 facing the stationary contact plate, the shielding portion 227 can physically protect the third connection portion 215, reduce the possibility of the arc moving to the third connection portion 215 and the terminal block 216, ensure the arc extinguishing efficiency of the circuit breaker, and then increase the electrical clearance and creepage distance between the moving contact and the stationary contact assembly 200, further ensure the arc extinguishing efficiency of the circuit breaker, and ensure the one-time pass rate of the circuit breaker breaking test.

[0146] Finally, it should be noted that the above embodiments are only specific implementation manners of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions within the technical scope disclosed in the present application should be covered by the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A static contact component, characterized in that, Applied to a circuit breaker, the circuit breaker comprises a moving contact, the moving contact can contact with the stationary contact assembly, and the stationary contact assembly comprises: The static contact body comprises a static contact plate and a static contact point connected to each other, wherein the static contact point can contact the moving contact, and the static contact plate is provided with at least one first connecting portion; A protective structure includes a protective portion and at least one second connecting portion, wherein the second connecting portion is arranged on a side of the protective portion facing the static contact plate, the second connecting portion corresponds to the first connecting portion one by one, at least part of the protective portion is arranged between the moving contact and the static contact plate, and the protective portion shields at least part of the static contact plate and exposes the static contact point.

2. The static contact assembly according to claim 1, wherein The protection part comprises: a protective plate, disposed between the moving contact and the stationary contact plate, the protective plate shielding at least a portion of the stationary contact plate and exposing the stationary contact point, and the second connecting portion being disposed on a side of the protective plate facing the stationary contact plate; At least one protective protrusion is connected to the protective plate, and the protective protrusion is shielded by the side wall of the stationary contact plate.

3. The stationary contact assembly according to claim 2, characterized in that: The static touch plate comprises a matching static touch plate body and an extension portion, the static touch plate body is provided with a receiving groove, the extension portion is arranged in the receiving groove, and the extension portion is provided with the static contact point; The protective protrusion includes a matching protrusion, at least a portion of which extends into the receiving groove and matches with the groove wall of the receiving groove.

4. The stationary contact assembly according to claim 2, characterized in that: The protection structure also includes a first side plate and a second side plate that are spaced apart from each other. The first side plate and the second side plate are both located on a side of the protection plate away from the stationary contact plate. At least part of the rotation trajectory of the moving contact is located between the first side plate and the second side plate.

5. The stationary contact assembly according to claim 4, characterized in that: The first side panel includes a first sub-panel and a second sub-panel connected to each other, and the second sub-panel is arranged farther from the protective plate than the first sub-panel; The second side panel includes a third sub-panel and a fourth sub-panel connected to each other, the fourth sub-panel is arranged farther away from the protective plate than the third sub-panel, the distance between the first sub-panel and the third sub-panel is a first distance, the distance between the second sub-panel and the fourth sub-panel is a second distance, and the second distance is greater than the first distance.

6. The static contact component according to claim 4, characterized in that The protective structure also includes: A first reinforcing plate, connecting the first side plate and the protective plate; and / or, The second reinforcing plate connects the second side plate and the protective plate.

7. The static contact assembly according to claim 1, wherein Also includes: A wiring board connected to an end of the stationary contact plate away from the stationary contact point through a third connecting portion; The protection structure further includes a shielding portion, which is connected to the protection portion, and at least a portion of the shielding portion shields a side of the third connection portion that faces the stationary touch plate.

8. A circuit breaker, characterized in that, It comprises a base, a moving contact and a stationary contact assembly as claimed in any one of claims 1 to 7; The moving contact is movably connected to the base, the stationary contact assembly is fixedly connected to the base, and the moving contact is movable relative to the stationary contact assembly.

9. The circuit breaker according to claim 8, characterized in that The base includes a partition board, the partition board is provided with a relief groove, the moving contact is movable relative to the relief groove and can contact the static contact assembly, and the protection structure in the static contact assembly is connected to the partition board.

10. The circuit breaker according to claim 9, wherein a first connecting protrusion is provided on one side of the partition board facing the protection structure, and the first connecting protrusion abuts against the protection structure; a second connecting protrusion is provided on one side of the protection structure facing the partition board, and the second connecting protrusion abuts against the partition board.

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