Static contact structure and circuit breaker
By dividing the stationary contact structure into a main contact layer and a secondary contact layer, and selecting different materials, the problem of high cost of the stationary contact structure is solved, achieving the effect of reducing costs while ensuring performance.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-15
- Publication Date
- 2026-04-03
AI Technical Summary
The existing static contact structure of circuit breakers requires high conductivity and ablation resistance, resulting in high material costs.
The stationary contact structure is divided into a main contact layer and a secondary contact layer. The main contact layer is close to the moving contact and is made of a material that is resistant to ablation and has good conductivity. The secondary contact layer is made of a material that is resistant to ablation but has poor conductivity and is less expensive. It is connected to other components through a mounting part to prevent the secondary contact layer from directly contacting the moving contact.
While maintaining a similar volume and current carrying capacity for the stationary contact structure, the overall cost of the stationary contact structure has been reduced, while good conductivity and ablation resistance have been maintained.
Smart Images
Figure CN224082408U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of circuit breaker technology, specifically to a stationary contact structure and a circuit breaker. Background Technology
[0002] Circuit breakers are commonly used electrical switching devices in daily life, mainly used for controlling the on / off state of circuit systems and distributing current.
[0003] In existing technology, circuit breakers typically include an external protective housing and an internal contact assembly. The stationary and moving contacts are connected to the outside of the protective housing via external structures. When the stationary and moving contacts are in contact, the circuit remains connected; when they disconnect, the circuit is broken, thus achieving on / off control of the circuit.
[0004] However, in use, the contact assembly of the above structure needs to ensure good conductivity. Furthermore, a high-temperature arc will be generated at the contact point between the stationary and moving contacts during the opening and closing process. Therefore, the contact area between the stationary and moving contacts also needs to have good ablation resistance. These performance requirements result in higher material costs for the contact assembly, especially for the stationary contact. To ensure the current-carrying capacity of the stationary contact, it needs to have sufficient current-passing area, i.e., a certain volume. The combination of these factors leads to a higher overall cost for the stationary contact.
[0005] Therefore, there is an urgent need to provide a contact structure that can solve the problem of high cost caused by the high requirements for material properties and flow area of the contact components in the prior art. Utility Model Content
[0006] The purpose of this application is to provide a static contact structure and circuit breaker that can solve the problem of high cost caused by the high requirements for material properties and current-passing area of contact components in the prior art.
[0007] To achieve the above objectives, in a first aspect, this application provides a stationary contact structure for cooperating with a moving contact to achieve on / off control. The stationary contact structure includes a main contact layer and at least one secondary contact layer. The main contact layer is disposed close to the moving contact. A secondary contact layer is attached to the main contact layer and disposed on the side of the main contact layer opposite to the moving contact. The main contact layer and the at least one secondary contact layer are made of different materials.
[0008] Based on the embodiments described above, the stationary contact structure is specifically divided into a main contact layer and a secondary contact layer. The main contact layer is positioned close to the moving contact for direct contact, while the secondary contact layer is positioned on the side of the main contact layer away from the moving contact to avoid direct contact. Furthermore, the main and secondary contact layers are made of different materials. The high-temperature, high-pressure arc generated when the moving and stationary contact structures are closed directly acts on the surface of the main contact layer. Therefore, the main contact layer can be made of a material that is erosion-resistant and has good conductivity, allowing the overall stationary contact structure to better resist the erosion of the high-temperature, high-pressure arc and possess good current-carrying capacity. Conversely, the secondary contact layer does not directly contact the arc but can still carry a portion of the current. Therefore, the secondary contact layer can be made of a material that is erosion-resistant, has poor conductivity, and is also low-cost. In summary, through the above-described configuration of this application, while ensuring that the stationary contact structure has a basically consistent volume and thus a basically consistent current-carrying capacity, the overall cost of the stationary contact structure is reduced by replacing the secondary contact layer with a material that is erosion-resistant, has poor conductivity, and is low-cost.
[0009] In some embodiments, a mounting portion is provided on the side of the main contact layer away from the moving contact, the mounting portion penetrating the secondary contact layer and being at least partially exposed in the secondary contact layer.
[0010] Based on the embodiments described above, a mounting portion penetrating the secondary contact layer is provided for connection and conduction between the main contact layer and other components. The separately provided mounting portion is used for current conduction, eliminating the need for current conduction through the secondary contact layer. During use, the mounting portion is made of a material with superior conductivity to the secondary contact layer. This ensures both good overall conductivity of the stationary contact structure and reduces the overall cost of the stationary contact structure.
[0011] In some embodiments, the mounting portion is integrally formed with the main contact layer.
[0012] Based on the embodiments described above, by integrally configuring the mounting portion and the main contact layer, both are made of the same material, i.e., both are made of materials with good conductivity, thereby ensuring the overall conductivity of the stationary contact structure. Furthermore, the integral configuration of the mounting portion and the main contact layer also reduces the resistance at their contact point, further improving the overall conductivity of the stationary contact structure.
[0013] In some embodiments, the projection of the primary contact layer toward the secondary contact layer covers the secondary contact layer.
[0014] Based on the embodiments described above, by setting the projection of the main contact layer to cover the secondary contact layer, contact between the secondary contact layer and the moving contact is avoided during the opening and closing of the stationary contact structure and the moving contact. Simultaneously, it also prevents the secondary contact layer from being ablated by high-temperature, high-pressure arcs generated at the opening and closing positions. This ensures that the main contact layer, with its superior ablation resistance, always resists arc erosion, thereby reducing the possibility of damage to the stationary contact structure due to arc erosion.
[0015] In some embodiments, the secondary contact layer includes a second contact layer and a third contact layer. The second contact layer is attached to the main contact layer and disposed on the side of the main contact layer opposite to the moving contact. The third contact layer is attached to the second contact layer and disposed on the side of the second contact layer opposite to the main contact layer.
[0016] Based on the above embodiments of this application, by providing two layers for the secondary contact layer, specifically dividing it into a second contact layer and a third contact layer, different materials can be selected according to the different performance requirements at each location. This further refines the approach to better balance and adjust the conductivity and cost of the static contact structure.
[0017] In some embodiments, the third contact layer and the second contact layer are made of different materials.
[0018] Based on the embodiments described above, when the secondary contact layer is specifically divided into a second contact layer and a third contact layer, the second contact layer is sandwiched between the main contact layer and the third contact layer. When current passes through the stationary contact structure, the area through which the current passes is larger in the third contact layer, which is located on the outer side, while the area through which the current passes is smaller in the second contact layer, which is located in the middle. Therefore, by setting the third contact layer and the second contact layer to different materials, the conductivity and ablation resistance of different areas of the stationary contact structure can be specifically adjusted, achieving a higher cost-performance ratio.
[0019] In some embodiments, the stationary contact structure further includes an arc-starting plate and an insulating pad. The arc-starting plate is disposed on the side of the main contact layer near the moving contact, and the arc-starting plate is partially connected to the main contact layer. The insulating pad is connected to the main contact layer and surrounds the outer periphery of the arc-starting plate.
[0020] Based on the embodiments described above, by setting an arc-starting plate, the high-temperature and high-pressure arc generated at the opening and closing positions can be guided to the arc-extinguishing chamber or other locations for arc extinguishing, thereby reducing the erosion damage to the moving and stationary contact structures caused by the arc. Furthermore, by setting an insulating pad around the arc-starting plate, insulation protection can be provided to the outer periphery of the arc-starting plate.
[0021] According to a second aspect of this application, a circuit breaker is provided, comprising a housing, a moving contact, and the aforementioned stationary contact structure. A receiving cavity is formed inside the housing, and both the moving contact and the aforementioned stationary contact structure are disposed within the receiving cavity. The stationary contact structure cooperates with the moving contact to achieve on / off control.
[0022] Based on the embodiments described above, the circuit breaker provided by this application includes the aforementioned stationary contact structure. Through this arrangement, while ensuring the overall conductivity of the stationary contact structure, the structure can be divided into multiple parts. Different materials are selected according to the different operating conditions faced by each part, thereby allowing some parts of the stationary contact structure to be made of materials with poor ablation resistance and conductivity, and lower cost, thus reducing the overall cost of the stationary contact structure. This, in turn, reduces the overall cost of the circuit breaker while ensuring its overall operational performance.
[0023] In some embodiments, the circuit breaker further includes at least two external terminals, one of which is connected to the moving contact and the other of which is connected to the mounting portion.
[0024] Based on the embodiments described above, external terminals are provided to connect the moving contact and stationary contact structures to the overall circuit. By directly connecting the mounting portion to the external terminals, a complete connection is achieved from the main contact layer to the mounting portion and then to the external terminals. In this path, both the main contact layer and the mounting portion are made of materials with good conductivity, thereby enhancing the conductivity of the stationary contact structure in the circuit.
[0025] In some embodiments, the circuit breaker further includes an arc-extinguishing chamber disposed within a receiving cavity, with the arc-starting plates at least partially adjacent to the arc-extinguishing chamber.
[0026] Based on the above embodiments of this application, by setting an arc-extinguishing chamber inside the circuit breaker housing, the electric arc generated during the opening and closing of the moving and stationary contacts is guided to the arc-extinguishing chamber via the arc-inducing plate, and the arc-extinguishing process is completed in the arc-extinguishing chamber, thereby reducing the damage caused by the high-temperature and high-pressure electric arc to the moving and stationary contact structures.
[0027] Other features and advantages of this application will be described in detail in the following detailed description section. Attached Figure Description
[0028] The accompanying drawings are provided to further illustrate the present application and form part of the specification. They are used together with the following detailed description to explain the present application, but do not constitute a limitation thereof. In the drawings:
[0029] Figure 1 This is a schematic diagram of the stationary contact structure provided in the embodiments of this application.
[0030] Figure 2This is an exploded view of the stationary contact structure provided in the embodiments of this application.
[0031] Figure 3 This is an exploded view of the stationary contact structure and external terminals provided in the embodiments of this application.
[0032] Figure 4 This is an exploded view of a stationary contact structure provided in another embodiment of this application.
[0033] Figure 5 This is a cross-sectional schematic diagram of the circuit breaker provided in the embodiments of this application.
[0034] Explanation of reference numerals in the attached figures
[0035] 1. Main contact layer; 2. Secondary contact layer; 21. Secondary contact layer; 22. Third contact layer; 3. Mounting part; 4. Arc ignition plate; 5. Insulating pad; 6. Housing; 61. Receiving cavity; 62. External terminal; 63. Arc extinguishing chamber; 7. Moving contact. Detailed Implementation
[0036] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.
[0037] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.
[0038] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.
[0039] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.
[0040] In the description of this application, it should be noted that, unless otherwise stated, the terms "inner," "outer," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. In addition, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.
[0041] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "setup" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.
[0042] In existing technology, circuit breakers typically include an external protective housing and an internal contact assembly. The stationary and moving contacts are connected to the outside of the protective housing via external structures. When the stationary and moving contacts are in contact, the circuit remains connected; when they disconnect, the circuit is broken, thus achieving on / off control of the circuit.
[0043] However, in use, the contact assembly of the above structure needs to ensure good conductivity. Furthermore, a high-temperature arc will be generated at the contact point between the stationary and moving contacts during the opening and closing process. Therefore, the contact area between the stationary and moving contacts also needs to have good ablation resistance. These performance requirements result in higher material costs for the contact assembly, especially for the stationary contact. To ensure the current-carrying capacity of the stationary contact, it needs to have sufficient current-passing area, which means a certain volume, leading to a larger material usage. The combination of these factors results in a higher overall cost for the stationary contact.
[0044] To address the aforementioned problems in the prior art, according to a first aspect of this application, an embodiment of this application provides a stationary contact structure for cooperating with a moving contact 7 to achieve on / off control. (Reference) Figures 1 to 3 As shown, the stationary contact structure includes a main contact layer 1 and at least one secondary contact layer 2. The main contact layer 1 is disposed close to the moving contact 7. The secondary contact layer 2 is attached to the main contact layer 1 and disposed on the side of the main contact layer 1 opposite to the moving contact 7. The main contact layer 1 and the at least one secondary contact layer 2 are made of different materials.
[0045] Based on the above embodiments of this application, the stationary contact structure is specifically divided into a main contact layer 1 and a secondary contact layer 2. The main contact layer 1 is close to the moving contact 7 for direct contact with the moving contact 7, while the secondary contact layer 2 is disposed on the side of the main contact layer 1 away from the moving contact 7 to avoid direct contact with the moving contact 7.
[0046] Meanwhile, the main contact layer 1 and the secondary contact layer 2 are made of different materials. The high-temperature, high-pressure arc generated when the moving contact 7 and the stationary contact structure close directly acts on the surface of the main contact layer 1. Therefore, the main contact layer 1 can be made of a material that is erosion-resistant and has good conductivity, allowing the stationary contact structure as a whole to better resist the erosion of the high-temperature, high-pressure arc, while also possessing good current-carrying capacity. In contrast, the secondary contact layer 2 does not directly contact the arc, but it can still bear a portion of the current. Therefore, the secondary contact layer 2 can be made of a material that is erosion-resistant, has poor conductivity, and is also less expensive.
[0047] In summary, by adopting the above-mentioned configuration of this application, compared with the prior art, while ensuring that the static contact structure volume is basically the same and thus the current carrying capacity is basically the same, the overall cost of the static contact structure is reduced by replacing the secondary contact layer 2 with a material that is resistant to ablation and has poor conductivity and low cost.
[0048] In this application, the main contact layer 1 and the secondary contact layer 2 can be made of any suitable material. Specifically, the main contact layer 1 can be made of a material with better ablation resistance and conductivity, while the secondary contact layer 2 can be made of a material with poorer ablation resistance and conductivity but lower cost. For example, the main contact layer 1 can be made of copper, while the secondary contact layer 2 can be made of brass or aluminum. The specific choices can be made based on actual application conditions and other factors; this application does not impose any specific restrictions on this.
[0049] In some embodiments of this application, any suitable connection method can be selected between the main contact layer 1 and the secondary contact layer 2. For example, the main contact layer 1 and the secondary contact layer 2 can be directly pressed together by die casting. Alternatively, the two can be fixed by directly passing screws through them. Or, the main contact layer 1 and the secondary contact layer 2 can be fixed by die casting first, and then reinforced by screw connection. The specific configuration can be set according to the actual connection requirements, and this application does not impose specific limitations on this.
[0050] refer to Figure 3 As shown in some embodiments of this application, the main contact layer 1 may be provided with a mounting portion 3 on the side opposite to the moving contact 7. The mounting portion 3 penetrates the secondary contact layer 2 and is at least partially exposed in the secondary contact layer 2.
[0051] Based on the embodiments described above, a mounting portion 3 penetrating the secondary contact layer 2 is provided for connection and conduction between the main contact layer 1 and other components. The separately provided mounting portion 3 is used for current conduction, eliminating the need for current conduction through the secondary contact layer 2. During use, the mounting portion 3 is made of a material with superior conductivity to the secondary contact layer 2. This ensures both good overall conductivity of the stationary contact structure and reduces the overall cost of the stationary contact structure.
[0052] Specifically, when installing the mounting part 3, its specific structural shape can be set according to the structural shape of the other components it is to be connected to. For example, when the mounting part 3 is connected to the external terminal 62, if the connection end of the external terminal 62 is set to a circular structure, the end of the mounting part 3 can also be set to a corresponding circular structure, so that the mounting part 3 and the external terminal 62 can be connected better. Similarly, when the connecting component corresponding to the mounting part 3 is set to a rectangular or other shape, the shape of the mounting part 3 can be adjusted accordingly so that the mounting part 3 can be connected to the connecting component better.
[0053] Furthermore, in some embodiments of this application, the mounting part 3 may be integrally disposed with the main contact layer 1.
[0054] Based on the embodiments described above, by integrally configuring the mounting portion 3 and the main contact layer 1, the mounting portion 3 and the main contact layer 1 are made of the same material, i.e., both are made of materials with good conductivity, thereby ensuring the overall conductivity of the stationary contact structure. Furthermore, the integral configuration of the mounting portion 3 and the main contact layer 1 also reduces the resistance at their junction, thereby further improving the overall conductivity of the stationary contact structure.
[0055] Specifically, in the specific production and processing process, the mounting part 3 and the main contact layer 1 can be integrally formed by stamping, casting or turning. The specific processing method can be set according to the actual situation, and this application does not impose specific restrictions on it.
[0056] Furthermore, the mounting part 3 penetrates the secondary contact layer 2 during installation, and at this time, the mounting part 3 is integrally installed with the main contact layer 1. Therefore, during the process of connecting and fixing the secondary contact layer 2 and the main contact layer 1, the mounting part 3 can also pre-position the secondary contact layer 2 to facilitate the positioning and fixing of the secondary contact layer 2 and the main contact layer 1.
[0057] In some embodiments of this application, the projection of the main contact layer 1 toward the secondary contact layer 2 covers the secondary contact layer 2.
[0058] Based on the embodiments described above, by setting the projection of the main contact layer 1 to cover the secondary contact layer 2, contact between the secondary contact layer 2 and the moving contact 7 is avoided during the opening and closing process of the stationary contact structure and the moving contact 7. Simultaneously, it also prevents the secondary contact layer 2 from being ablated by the high-temperature, high-pressure electric arc generated at the opening and closing positions. This ensures that the main contact layer 1, with its superior ablation resistance, always resists arc erosion, thereby reducing the possibility of damage to the stationary contact structure due to arc erosion.
[0059] refer to Figure 4 As shown in some embodiments of this application, the secondary contact layer 2 includes a second contact layer 21 and a third contact layer 22. The second contact layer 21 is attached to the main contact layer 1 and disposed on the side of the main contact layer 1 away from the moving contact 7. The third contact layer 22 is attached to the second contact layer 21 and disposed on the side of the second contact layer 21 away from the main contact layer 1.
[0060] Based on the above embodiments of this application, by providing two layers for the secondary contact layer 2, specifically dividing it into a second contact layer 21 and a third contact layer 22, different materials can be selected according to the different performance requirements at each location. This further refines the approach to better balance and adjust the conductivity and cost of the static contact structure.
[0061] Furthermore, in some embodiments of this application, the third contact layer 22 and the second contact layer 21 are made of different materials.
[0062] Based on the embodiments described above, when the secondary contact layer 2 is specifically divided into a second contact layer 21 and a third contact layer 22, the second contact layer 21 is sandwiched between the main contact layer 1 and the third contact layer 22. When current passes through the stationary contact structure, the area through which the current passes is larger in the third contact layer 22, which is located on the outer side, while the area through which the current passes is smaller in the second contact layer 21, which is located in the middle. Therefore, by setting the third contact layer 22 and the second contact layer 21 to different materials, the conductivity and ablation resistance of different areas of the stationary contact structure can be specifically adjusted, achieving a higher cost-performance ratio.
[0063] Specifically, during the assembly of the stationary contact structure, the third contact layer 22 and the main contact layer 1 are respectively sandwiched on both sides of the second contact layer 21. In actual production and processing, the third contact layer 22 and the main contact layer 1 can be processed separately, and then fixed on both sides of the second contact layer 21 by die casting and screw connection. At this time, the materials of the main contact layer 1, the second contact layer 21, and the third contact layer 22 can be selected according to different needs to meet different working conditions.
[0064] Alternatively, the third contact layer 22 and the main contact layer 1 can be integrally formed, together forming a U-shaped structure sandwiched between the two sides of the second contact layer 21. In this case, both the third contact layer 22 and the main contact layer 1 are located on the outer side, so their flow areas are basically the same, and their corresponding operating requirements are also basically similar. Integrating them not only improves production efficiency but also reduces the overall resistance of the stationary contact structure, thus improving conductivity. The specific configuration can be tailored to the actual processing procedure; this application does not impose specific limitations on this.
[0065] refer to Figure 1 and Figure 2 As shown in some embodiments of this application, the stationary contact structure may further include an arc-guiding piece 4 and an insulating pad 5. The arc-guiding piece 4 is disposed on the side of the main contact layer 1 near the moving contact 7, and the arc-guiding piece 4 is partially connected to the main contact layer 1. The insulating pad 5 is connected to the main contact layer 1 and surrounds the outer periphery of the arc-guiding piece 4.
[0066] Based on the above embodiments of this application, by setting the arc-starting plate 4, the high-temperature and high-pressure electric arc generated at the opening and closing positions can be guided to the arc-extinguishing chamber 63 and other positions for arc extinguishing treatment, thereby reducing the ablation damage to the moving contact 7 and the stationary contact structure caused by the electric arc. Furthermore, by setting the insulating pad 5 on the outer periphery of the arc-starting plate 4, the outer periphery of the arc-starting plate 4 can be insulated and protected.
[0067] Based on the above technical solution, and according to the second aspect of this application, a circuit breaker is provided. (Reference) Figure 5 As shown, the circuit breaker includes a housing 6, a moving contact 7, and the aforementioned stationary contact structure. A receiving cavity 61 is formed inside the housing 6, and both the moving contact 7 and the aforementioned stationary contact structure are disposed within the receiving cavity 61. The stationary contact structure cooperates with the moving contact 7 to achieve on / off control.
[0068] Based on the embodiments described above, the circuit breaker provided by this application includes the aforementioned stationary contact structure. Through this arrangement, while ensuring the overall conductivity of the stationary contact structure, the structure can be divided into multiple parts. Different materials are selected according to the different operating conditions faced by each part, thereby allowing some parts of the stationary contact structure to be made of materials with poor ablation resistance and conductivity, and lower cost, thus reducing the overall cost of the stationary contact structure. This, in turn, reduces the overall cost of the circuit breaker while ensuring its overall operational performance.
[0069] refer to Figure 5 As shown in some embodiments of this application, the circuit breaker may further include at least two external terminals 62, one of which is connected to the moving contact 7 and the other external terminal 62 is connected to the mounting portion 3.
[0070] Based on the embodiments described above, external terminals 62 are provided to connect the moving contact 7 and the stationary contact structure to the overall circuit. The mounting portion 3 is directly connected to the external terminals 62, thereby achieving overall connectivity from the main contact layer 1 to the mounting portion 3 and then to the external terminals 62. In this path, both the main contact layer 1 and the mounting portion 3 are made of materials with good conductivity, thereby enhancing the conductivity of the stationary contact structure in the circuit.
[0071] refer to Figure 5 As shown in some embodiments of this application, the circuit breaker may further include an arc-extinguishing chamber 63, which is disposed within a receiving cavity 61, with the arc-starting piece 4 at least partially adjacent to the arc-extinguishing chamber 63.
[0072] Based on the above embodiments of this application, by providing an arc-extinguishing chamber 63 inside the circuit breaker housing 6, the electric arc generated during the opening and closing of the moving contact 7 and the stationary contact structure is guided to the arc-extinguishing chamber 63 via the arc-inducing plate 4, and the arc-extinguishing process is completed in the arc-extinguishing chamber 63, thereby reducing the damage caused by the high-temperature and high-pressure electric arc to the moving contact 7 and the stationary contact structure.
[0073] Specifically, during actual production and processing, the arc-extinguishing chamber 63 can be selected from any suitable structure. This may include structures such as a vacuum arc-extinguishing chamber and a gas-blown arc-extinguishing chamber. Furthermore, the structure of the arc-initiating plate 4 can be adaptively adjusted based on different arc-extinguishing chamber 63 structures. Since this application does not involve improvements to the specific structure of the arc-extinguishing chamber 63, no specific limitations are imposed in this regard.
[0074] Furthermore, it should be noted that the circuit breaker in this application is not limited to the components mentioned above. For example, in some embodiments of this application, the actual circuit breaker may also include a triggering structure to drive the moving contact 7 to move and achieve opening and closing actions. As another example, in other embodiments of this application, the contact positions between the moving contact 7 and the stationary contact structure may be respectively provided with a moving contact and a stationary contact, with the moving contact and stationary contact correspondingly arranged and both made of a material with good conductivity, such as silver, so that the moving contact 7 can stably conduct when the stationary contact structure is closed. The specific configuration can be determined according to the usage requirements of the circuit breaker, and this application does not impose specific limitations on this.
[0075] The preferred embodiments of this application have been described in detail above with reference to the accompanying drawings. However, this application is not limited to the specific details of the above embodiments. Within the scope of the technical concept of this application, various simple modifications can be made to the technical solution of this application, and these simple modifications all fall within the protection scope of this application.
[0076] It should also be noted that the various specific technical features described in the above embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, this application will not describe the various possible combinations separately.
[0077] Furthermore, various different implementations of this application can be combined in any way, as long as they do not violate the spirit of this application, they should also be regarded as the content disclosed in this application.
Claims
1. A stationary contact structure for use with a moving contact to achieve on / off control, characterized in that, The stationary contact structure includes: The main contact layer is located near the moving contact; At least one contact layer is attached to the main contact layer and is disposed on the side of the main contact layer opposite to the moving contact; The main contact layer and at least one secondary contact layer are made of different materials.
2. The stationary contact structure according to claim 1, characterized in that, The main contact layer has a mounting portion on the side opposite to the moving contact. The mounting portion penetrates the secondary contact layer and is at least partially exposed in the secondary contact layer.
3. The stationary contact structure according to claim 2, characterized in that, The mounting part is integrally formed with the main contact layer.
4. The stationary contact structure according to any one of claims 1-3, characterized in that, The projection of the main contact layer toward the secondary contact layer covers the secondary contact layer.
5. The stationary contact structure according to claim 1, characterized in that, The secondary contact layer includes a second contact layer and a third contact layer. The second contact layer is attached to the main contact layer and is disposed on the side of the main contact layer opposite to the moving contact. The third contact layer is attached to the second contact layer and is disposed on the side of the second contact layer opposite to the main contact layer.
6. The stationary contact structure according to claim 5, characterized in that, The third contact layer and the second contact layer are made of different materials.
7. The stationary contact structure according to claim 1, characterized in that, The stationary contact structure also includes an arc-guiding plate and an insulating pad. The arc-guiding plate is disposed on the side of the main contact layer near the moving contact, and the arc-guiding plate is partially connected to the main contact layer. The insulating pad is connected to the main contact layer and surrounds the outer periphery of the arc-starting plate.
8. A circuit breaker, characterized in that, The circuit breaker includes: The shell has an internal cavity for receiving the contents; A moving contact is disposed within the receiving cavity; and, The stationary contact structure as described in any one of claims 1-7, wherein the stationary contact structure cooperates with the moving contact to achieve on / off control.
9. The circuit breaker according to claim 8, characterized in that, The circuit breaker also includes at least two external terminals, one of which is connected to the moving contact, and the other of which is connected to the mounting portion.
10. The circuit breaker according to claim 8, characterized in that, The circuit breaker also includes an arc-extinguishing chamber, which is disposed within the receiving cavity, with the arc-starting plate at least partially adjacent to the arc-extinguishing chamber.