A miniature residual current circuit breaker

Abstract

This application discloses a miniature residual current circuit breaker, comprising a circuit breaker housing and a first L-pole structure disposed within the circuit breaker housing. The first L-pole structure includes an L-pole operating mechanism, an L-pole moving contact, and an L-pole stationary contact. The L-pole moving contact is rotatably arranged around a first axis and is driven by the L-pole operating mechanism to rotate around the first axis, thereby realizing the opening and closing movements of the L-pole moving contact. The circuit breaker housing also contains an N-pole moving contact, an N-pole stationary contact, and a linkage component. The N-pole moving contact is rotatably arranged, and its rotation center does not coincide with the first axis. The linkage component is slidably arranged, and the N-pole moving contact and the first L-pole structure are linked through the linkage component, so that the L-pole operating mechanism drives the N-pole moving contact to perform opening and closing movements. This application features an N-pole capable of interruption.

Description

Technical Field

[0001] This application relates to the field of circuit breakers, specifically a miniature residual current circuit breaker. Background Technology

[0002] There are many types of miniature residual current circuit breakers (RCCBs). As a long type of RCCB, its N pole often uses a straight-through method (a single flexible conductor directly connected to the terminal), meaning the N pole does not have a break point. This method results in very limited breaking performance. For example, CN202495406U uses this structure.

[0003] Therefore, it is essential to design a long, narrow, N-pole-interrupting miniature residual current circuit breaker. Summary of the Invention

[0004] In view of this, the purpose of this application is to overcome the shortcomings of the prior art and to provide a miniature residual current circuit breaker.

[0005] This application provides a miniature residual current circuit breaker, comprising a circuit breaker housing and a first L-pole structure disposed within the circuit breaker housing. The first L-pole structure includes an L-pole operating mechanism, an L-pole moving contact, and an L-pole stationary contact. The L-pole moving contact is rotatably arranged around a first axis and is driven by the L-pole operating mechanism to rotate around the first axis to realize the opening and closing movements of the L-pole moving contact. The circuit breaker housing also contains an N-pole moving contact, an N-pole stationary contact, and a linkage component. The N-pole moving contact is rotatably arranged, and its rotation center does not coincide with the first axis. The linkage component is slidably arranged, and the N-pole moving contact and the first L-pole structure are linked through the linkage component, so that the L-pole operating mechanism drives the N-pole moving contact to perform opening and closing movements.

[0006] In some embodiments of this application, a first L-pole first terminal, an N-pole terminal, and a connecting wire are also included. The first L-pole first terminal is electrically connected to the L-pole moving contact of the first L-pole structure; the N-pole terminal is electrically connected to the N-pole moving contact; the first L-pole first terminal and the N-pole terminal are adjacent in a second direction and separated by the circuit breaker housing; one end of the connecting wire is connected to the N-pole stationary contact, and the other end extends out of the circuit breaker housing. The part of the connecting wire that extends out of the circuit breaker housing in a third direction is located below the N-pole terminal.

[0007] In some embodiments of this application, a first L-pole first terminal, an N-pole terminal, and a connecting wire are also included. The first L-pole first terminal is electrically connected to the L-pole moving contact of the first L-pole structure. The N-pole terminal is electrically connected to the N-pole moving contact. The first L-pole first terminal and the N-pole terminal are adjacent in a second direction and separated by the circuit breaker housing. One end of the connecting wire is connected to the N-pole stationary contact, and the other end is connected to a connector. In a third direction, the connector is located below the N-pole terminal.

[0008] In some embodiments of this application, the L-pole operating mechanism includes a contact support, an L-pole moving contact is rotatably mounted on the contact support, one end of the linkage is connected to the contact support, and the other end is connected to the N-pole moving contact.

[0009] In some embodiments of this application, in a third-party orientation, the position where the L-pole operating mechanism is connected to the linkage is lower than the position where the N-pole moving contact is connected to the linkage.

[0010] In some embodiments of this application, the structure in which the L-pole operating mechanism is connected to the linkage is a hole-shaft mating structure.

[0011] In some embodiments of this application, the connection between the linkage and the N-pole moving contact is a hole-shaft mating structure.

[0012] In some embodiments of this application, the N-pole stationary contact includes an N-pole stationary contact point, and the part of the N-pole moving contact connected to the linkage and the N-pole moving contact point are respectively located on both sides of the rotation center of the N-pole moving contact; regardless of whether the L-pole operating mechanism performs a closing operation or a opening operation, the rotation direction of the N-pole moving contact is always opposite to the rotation direction of the L-pole moving contact.

[0013] In some embodiments of this application, the L-pole operating mechanism includes a rotatably configured handle, wherein in a first direction, the straight-line distance from the rotation center of the handle to the rotation center of the L-pole moving contact is less than the straight-line distance from the rotation center of the L-pole moving contact to the rotation center of the N-pole moving contact.

[0014] In some embodiments of this application, the L-pole operating mechanism includes a handle that is rotatably configured, and in the third direction, the straight-line distance from the rotation center of the handle to the rotation center of the L-pole moving contact is less than the straight-line distance from the rotation center of the L-pole moving contact to the rotation center of the N-pole moving contact.

[0015] In some embodiments of this application, an N-pole contact spring is connected between the N-pole moving contact and the circuit breaker housing, and the N-pole contact spring provides contact pressure for the N-pole moving contact.

[0016] In some embodiments of this application, an N-pole rotating post is also provided on the circuit breaker housing. The N-pole moving contact has an oblong hole, the size of which is larger than the diameter of the N-pole rotating post. The oblong hole is fitted onto the N-pole rotating post to form a rotating configuration of the N-pole moving contact, and the oblong hole and the N-pole rotating post slide relative to each other during the rotation of the N-pole moving contact.

[0017] In some embodiments of this application, the circuit breaker housing also includes a limiting protrusion, which is disposed on the side of the N-pole moving contact to limit the maximum movement distance of the N-pole moving contact.

[0018] In some embodiments of this application, the arc-inducing angle of the N-pole moving contact and the arc-inducing angle of the N-pole stationary contact are also included, with the arc-inducing angle of the N-pole stationary contact being fixed to or integral with the N-pole stationary contact.

[0019] In some embodiments of this application, the circuit breaker housing is divided into an L-pole chamber and an N-pole chamber; in a first direction, the L-pole chamber is located on the side of the N-pole chamber, and the L-pole chamber and the N-pole chamber are separated from each other; a first L-pole structure is disposed in the L-pole chamber, and an N-pole structure is disposed in the N-pole chamber.

[0020] In some embodiments of this application, the circuit breaker housing includes a first half-shell and a first sub-shell. The first half-shell has an L-pole region and an N-pole region. The L-pole region is part of the L-pole chamber. The first sub-shell at least covers the N-pole region of the first half-shell to form the N-pole chamber.

[0021] In some embodiments of this application, the circuit breaker housing includes a first half-shell and a first sub-shell. The first half-shell has an L-pole region, a first partition and a second partition. The first partition and the second partition are spaced apart in a first direction to form an N-pole region. The L-pole region is part of the L-pole chamber and the N-pole region is part of the N-pole chamber. The linkage passes through the first partition and is connected to the N-pole moving contact.

[0022] In some embodiments of this application, the circuit breaker housing is provided with an N-pole exhaust channel, and the N-pole exhaust channel has an N-pole vent on the surface of the circuit breaker housing. The N-pole vent is located on one of the surfaces of the circuit breaker housing in a third direction.

[0023] In some embodiments of this application, an N-pole exhaust channel is provided on the circuit breaker housing, and the N-pole exhaust channel has an N-pole vent on the surface of the circuit breaker housing. The N-pole exhaust channel has a meandering structure.

[0024] In some embodiments of this application, the circuit breaker housing is provided with an N-pole exhaust channel, the N-pole exhaust channel has an N-pole vent on the surface of the circuit breaker housing, and an anti-ionization structure is provided in the N-pole exhaust channel.

[0025] In some embodiments of this application, there are three L-pole chambers inside the circuit breaker housing. The three L-pole chambers are arranged sequentially along the second direction and separated from each other. One of the L-pole chambers located on the outer side is the first L-pole chamber, and the N-pole chamber is located on one side of the first L-pole chamber in the first direction. The first L-pole structure is located inside the first L-pole chamber. In addition to the first L-pole chamber, the other two L-pole chambers are each provided with a set of L-pole structures. Each L-pole structure includes an L-pole operating mechanism, an L-pole moving contact, and an L-pole stationary contact. The three L-pole operating mechanisms are linked together.

[0026] The advantages of this application compared to the prior art are: The N-pole structure of this application is a breakable structure, comprising an N-pole moving contact and an N-pole stationary contact. The N-pole moving contact is connected to the L-pole operating mechanism via a linkage. When the L-pole operating mechanism performs a closing operation, it can drive both the N-pole and L-pole moving contacts to close. Compared to existing technologies, this structure improves the breaking capacity of the circuit breaker. Attached Figure Description

[0027] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 A perspective view of a miniature residual current circuit breaker according to an embodiment of this application is shown; Figure 2 This diagram shows a miniature residual current circuit breaker according to an embodiment of the present application after the circuit breaker housing has been removed. Figure 3 A schematic diagram of the first L-pole structure in an embodiment of this application is shown; Figure 4 A schematic diagram of the first half-shell in an embodiment of this application is shown; Figure 5 An axial view of the first half-shell and the first sub-shell in an embodiment of this application is shown; Figure 6 The following is a schematic diagram of the contact support, linkage, and N-pole contact in an embodiment of this application; Figure 7 This diagram shows a schematic of the first L-pole mechanism and the N-pole contact being closed in an embodiment of this application. Figure 8 This diagram illustrates the first L-pole mechanism and the N-pole contact in the open position in an embodiment of this application. Figure 9 A schematic diagram of three half-shells and a cover shell in an embodiment of this application is shown; Figure 10 A schematic diagram of the N-terminal and the first L-terminal in an embodiment of this application is shown. Detailed Implementation

[0029] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0030] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are 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 of this application.

[0031] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0032] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0033] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature. Example

[0034] like Figures 1-10 As shown, a small residual current circuit breaker is a 3P+N circuit breaker, which has three L-pole structures 100 and one N-pole structure 200.

[0035] Here, all three L-pole structures 100 and N-pole structures 200 are breakable structures, and are all housed in the circuit breaker housing 300 and separated by the circuit breaker housing 300.

[0036] The three L-pole structures 100 are arranged sequentially along the second direction D (which can be understood as the width direction), and the three L-pole structures 100 are also separated from each other. The L-pole structure 100 located at the outermost edge is the first L-pole structure 100', and the N-pole structure 200 is located on one side of the first L-pole structure 100', specifically on one side of the first direction L (which can be understood as the length direction).

[0037] The circuit breaker housing 300 includes three half-houses, a cover 320, and a first sub-house 330.

[0038] The three half-shells are, in order, the first half-shell 310-1, the second half-shell 310-2, and the third half-shell 310-3.

[0039] The first half-shell 310-1 has an opening on one side in the second direction D, and the first half-shell 310-1 has an L pole region S1 and an N pole region S2.

[0040] The second half-shell 310-2 is located on the side of the first half-shell 310-1 with an opening, and blocks this part of the L pole region S1, thereby forming a space to accommodate the first L pole structure 100', also called the first L pole chamber.

[0041] The first subshell 330 covers the N-pole region S2 of the first half-shell 310-1, together forming the N-pole chamber, in which the N-pole structure 200 is housed.

[0042] The second half-shell 310-2 has an opening on one side in the second direction D, and the third half-shell 310-3 is located on this side and blocks the opening of the second half-shell 310-2, thereby forming the second L-polar chamber.

[0043] The third half-shell 310-3 has an opening on one side in the second direction D, and the cover shell 320 is located on this side and blocks the opening of the third half-shell 310-3, thereby forming a third L-polar chamber.

[0044] Regardless of which L-pole structure 100 has space, it has an L-pole structure 100. Since the L-pole structures 100 are all the same, only the first L-pole structure 100' will be introduced below. The other L-pole structures 100 refer to the first L-pole structure 100' (the only difference is that only the first L-pole structure 100' has a relationship with the N-pole structure 200, while the other L-pole structures 100 do not have a relationship with the N-pole structure 200).

[0045] The first L-pole structure 100' includes an L-pole operating mechanism 110, an L-pole moving contact 120, and an L-pole stationary contact 130.

[0046] The L-pole operating mechanism 110 includes a four-bar linkage consisting of a rotatable handle 111, a connecting rod connected to the handle 111 and moving with the handle 111, a latch, a rotatable contact support 112, and a contact spring providing contact pressure to the L-pole moving contact 120. Since four-bar linkages are common knowledge in the art, they will not be described in detail here. The three L-pole operating mechanisms 110 are linked, specifically by connecting the handles 111 via handle sleeves.

[0047] The L-pole moving contact 120 is rotatably mounted on the contact support 112 and rotates around the first axis P1. Here, the rotation centers of the L-pole moving contact 120 and the contact support 112 are the same, although they can be made different. Driven by the L-pole operating mechanism 110, the L-pole moving contact 120 can rotate in one direction to contact the L-pole stationary contact 130, completing the closing action. Of course, the L-pole operating mechanism 110 can also drive the L-pole moving contact 120 to rotate in the opposite direction away from the L-pole stationary contact 130, completing the opening action.

[0048] The N-pole structure 200 includes an N-pole moving contact 210, an N-pole stationary contact 220, and a linkage 230. The N-pole moving contact 210 is rotatably disposed within the N-pole chamber, and the N-pole stationary contact 220 is fixed within the N-pole chamber. The linkage 230 is slidably disposed with respect to the circuit breaker housing 300. One end of the linkage 230 is connected to the L-pole operating mechanism 110 of the first L-pole structure 100', and the other end is connected to the N-pole moving contact 210. Thus, through the linkage 230, the L-pole operating mechanism 110 can simultaneously perform opening and closing operations, thereby driving the N-pole moving contact 210 to perform closing and opening movements.

[0049] Here, the rotation center of the N-pole moving contact 210 does not coincide with the first axis P1, that is, the rotation centers of the N-pole moving contact 210 and the L-pole moving contact 120 are different.

[0050] This configuration enables the N-pole structure 200 to be interruptible, which improves the breaking capacity compared to existing technologies.

[0051] For the linkage 230, one end is connected to the contact support 112, and the other end is connected to the N-pole moving contact 210. This connection structure allows one contact support 112 to drive the movement of two moving contacts, resulting in relatively stable transmission.

[0052] On the third-party H direction, the position where the L-pole operating mechanism 110 is connected to the linkage 230 is lower than the position where the N-pole moving contact 210 is connected to the linkage 230. This structural design will facilitate the internal space design of the circuit breaker housing 300, ensuring a more compact relative position between the various modules.

[0053] Whether it's the contact support 112 and the linkage 230, or the linkage 230 and the N-pole moving contact 210, their connection methods are varied, as long as the connection between the two can be stable. Here, both adopt a hole-shaft mating structure, which is extremely convenient for assembly. Taking the contact support 112 as an example, the contact support 112 is provided with a first columnar structure 1121, one end of the linkage 230 is set on the first columnar structure 1121, and the other end of the linkage 230 is provided with a second columnar structure 2301. The N-pole moving contact 210 is fitted on the second columnar structure 2301.

[0054] Regarding the N-pole moving contact 210, it includes an N-pole moving contact 2103. The portion of the N-pole moving contact 210 connected to the linkage 230 and the N-pole moving contact 2103 are respectively located on both sides of the rotation center P2 of the N-pole moving contact 210. Furthermore, regardless of whether the L-pole operating mechanism 110 performs a closing or opening operation, the rotation direction of the N-pole moving contact 210 is always opposite to the rotation direction of the L-pole moving contact 120. This structure makes full use of space, resulting in a more rational transmission of each component.

[0055] In the first direction L, the straight-line distance d1 from the rotation center of the handle 111 to the rotation center of the L-pole moving contact 120 (first axis P1) is less than the straight-line distance d2 from the rotation center of the L-pole moving contact 120 (first axis P1) to the rotation center P2 of the N-pole moving contact 210. This structure is more suitable for long RCBO type circuit breakers, making full use of the internal space.

[0056] On the third direction H, the straight-line distance d3 from the rotation center of handle 111 to the rotation center of L-pole moving contact 120 (first axis P1) is less than the straight-line distance d4 from the rotation center of L-pole moving contact 120 (first axis P1) to the rotation center P2 of N-pole moving contact 210. This structure is also more suitable for long RCBO type circuit breakers, making full use of the internal space.

[0057] To ensure contact, an N-pole contact spring 240 is connected between the N-pole moving contact 210 and the circuit breaker housing 300, providing contact pressure to the N-pole moving contact 210. Here, the N-pole contact spring 240 is a tension spring, with one end connected to the first half-shell 310-1 and the other end connected to the N-pole moving contact 210. As the N-pole moving contact 210 rotates to the contact position and passes the dead point, the N-pole contact spring 240 stores energy and applies a force towards the N-pole stationary contact 220. Alternatively, a torsion spring can also be used for the N-pole contact.

[0058] The N-pole rotating post 3101 on the first half-shell 310-1 has an oblong hole 2101 on its moving contact 210. The size of the oblong hole 2101 is larger than the diameter of the N-pole rotating post 3101. The oblong hole 2101 fits onto the N-pole rotating post 3101 to form a rotating configuration for the moving contact 210. In other words, the moving contact 210 will no longer simply rotate, but can also slide relative to the N-pole rotating post 3101 using the oblong hole 2101 during rotation. This oblong hole 2101 design can increase the opening distance of the N-pole contact. Here, the N-pole rotating post 3101 can be integrally formed on the first half-shell 310-1, or it can be inserted into the first half-shell 310-1 using a pin.

[0059] In order to limit the maximum position of the N-pole moving contact 210, a limiting protrusion 3102 is also provided on the first half-shell 310-1. The limiting protrusion 3102 is located on one side of the N-pole moving contact 210. When the N-pole moving contact 210 moves to the limit position, it can contact the limiting protrusion 3102 for limiting.

[0060] To enhance the arc-extinguishing capability of the N-pole structure 200, the first half-shell 310-1 also includes an N-pole moving contact arc-initiating angle 250 and an N-pole stationary contact arc-initiating angle 260. The N-pole moving contact arc-initiating angle 250 is inserted into the first half-shell 310-1 to initiate the arc of the N-pole moving contact 210, while the N-pole stationary contact arc-initiating angle 260 is integral with the N-pole stationary contact 220 to initiate the arc of the N-pole stationary contact 220. Alternatively, the N-pole stationary contact arc-initiating angle 260 is independently formed and fixed to the N-pole stationary contact 220.

[0061] The first half-shell 310-1 has a first partition 3103 and a second partition 3104, which are spaced apart in the first direction L to form an N-pole region S2. The linkage 230 passes through the first partition 3103 and connects to the N-pole moving contact 210. The first sub-shell 330 is staggered with both partitions. This design of the first partition 3103 and the second partition 3104 makes it easier to form the N-pole region S2. It also facilitates the assembly of the first sub-shell 330 with it.

[0062] Here, the linkage 230 passes through the first partition 3103 and is connected to the N-pole moving contact 210.

[0063] In order to facilitate the venting when the N pole structure 200 is disconnected, the circuit breaker housing 300 is provided with an N pole venting channel 340. The N pole venting channel 340 has an N pole vent 341 on the surface of the circuit breaker housing 300. The N pole vent 341 is located on the lower surface of the first half-shell 310-1, which is one of the surfaces in the third direction H.

[0064] Here, the N-electrode exhaust channel 340 has a meandering structure. This meandering structure means that the interior of the N-electrode exhaust channel 340 is winding and circuitous, rather than a straight channel. This structure prevents the electric arc from being directly ejected from the N-electrode exhaust port 341.

[0065] Here, an anti-ionization structure 342 is provided in the N-stage exhaust channel 340. The anti-ionization structure 342 is beneficial for adsorbing charged particles in the gas. Here, the anti-ionization structure 342 is a perforated mesh plate, but it can also be made of metal wire mesh, metal mesh plate, etc.

[0066] For the L-pole structure 100, it is connected to the circuit through L-pole terminals, specifically through the first L-pole terminal 140 and the second L-pole terminal 150. Taking the first L-pole structure 100' as an example, it includes the first L-pole first terminal 140' and the first L-pole second terminal 150'. The first L-pole first terminal 140' is electrically connected to the L-pole moving contact 120, specifically through a flexible L-pole connection. The first L-pole second terminal 150' is electrically connected to the L-pole stationary contact 130, specifically through a terminal block, coil, etc.

[0067] For the N-pole structure 200, it is connected to the circuit through the N-pole terminal 270, connecting wire 280, etc. The N-pole terminal 270 and the N-pole moving contact 210 are connected by the N-pole soft connection. The N-pole stationary contact 220 is connected to one end of the connecting wire 280, and the other end of the connecting wire 280 passes through the circuit breaker housing 300 to the outside for wiring.

[0068] Here, the first L pole first terminal 140' and the N pole terminal 270 are adjacent in the second direction D and separated by the circuit breaker housing 300. Specifically, the separation between the two is achieved by the first sub-housing 330.

[0069] On the third-direction H, the connecting wire 280 exits the circuit breaker housing 300 at a point below the N-terminal 270. Alternatively, the connecting wire 280 may not exit the circuit breaker housing 300 and may instead have a connector. The other end of the connecting wire 280 connects to the connector, allowing external wires to be connected via the connector. In this connector configuration, the connector on the third-direction H is also located below the N-terminal 270.

[0070] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0071] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

[0072] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0073] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A miniature residual current circuit breaker, comprising a circuit breaker housing and a first L-pole structure disposed within the circuit breaker housing, the first L-pole structure comprising an L-pole operating mechanism, an L-pole moving contact, and an L-pole stationary contact; the L-pole moving contact is rotatably arranged around a first axis, and the L-pole moving contact is driven by the L-pole operating mechanism to rotate around the first axis to realize the opening and closing movements of the L-pole moving contact; characterized in that: The circuit breaker housing is also equipped with an N-pole moving contact, an N-pole stationary contact, and a linkage component. The N-pole moving contact is rotatable, and the rotation center of the N-pole moving contact does not coincide with the first axis. The linkage component is slidable, and the N-pole moving contact and the first L-pole structure are linked through the linkage component so that the L-pole operating mechanism drives the N-pole moving contact to perform opening and closing movements.

2. The miniature residual current circuit breaker according to claim 1, characterized in that: It also includes a first L pole first terminal, an N pole terminal and a connecting wire. The first L pole first terminal is electrically connected to the L pole moving contact of the first L pole structure; the N pole terminal is electrically connected to the N pole moving contact; the first L pole first terminal and the N pole terminal are adjacent in the second direction and separated by the circuit breaker housing; one end of the connecting wire is connected to the N pole stationary contact, and the other end extends out of the circuit breaker housing. The part of the connecting wire that extends out of the circuit breaker housing in the third direction is below the N pole terminal. Alternatively, it may also include a first L-pole first terminal, an N-pole terminal, and a connecting wire. The first L-pole first terminal is electrically connected to the L-pole moving contact of the first L-pole structure; the N-pole terminal is electrically connected to the N-pole moving contact; the first L-pole first terminal and the N-pole terminal are adjacent in the second direction and separated by the circuit breaker housing; one end of the connecting wire is connected to the N-pole stationary contact, and the other end is connected to a connector, with the connector located below the N-pole terminal in the third direction.

3. A miniature residual current circuit breaker according to claim 1, characterized in that: The L-pole operating mechanism includes a contact support, an L-pole moving contact rotatably mounted on the contact support, and one end of the linkage is connected to the contact support, while the other end is connected to the N-pole moving contact. And / or, in the direction of a third party, the position where the L-pole operating mechanism is connected to the linkage is lower than the position where the N-pole moving contact is connected to the linkage; And / or, the structure connecting the L-pole operating mechanism and the linkage is a hole-shaft mating structure; And / or, the connection between the linkage and the N-pole moving contact is a hole-shaft mating structure.

4. A miniature residual current circuit breaker according to claim 1, characterized in that: The N-pole moving contact includes an N-pole moving contact point. The part of the N-pole moving contact connected to the linkage and the N-pole moving contact point are located on both sides of the rotation center of the N-pole moving contact. Regardless of whether the L-pole operating mechanism performs a closing operation or a opening operation, the rotation direction of the N-pole moving contact is always opposite to that of the L-pole moving contact.

5. A miniature residual current circuit breaker according to claim 1, characterized in that: The L-pole operating mechanism includes a handle that is rotatably arranged. In the first direction, the straight-line distance from the rotation center of the handle to the rotation center of the L-pole moving contact is less than the straight-line distance from the rotation center of the L-pole moving contact to the rotation center of the N-pole moving contact. And / or, the L-pole operating mechanism includes a handle that is rotatably configured, wherein, in the third direction, the straight-line distance from the rotation center of the handle to the rotation center of the L-pole moving contact is less than the straight-line distance from the rotation center of the L-pole moving contact to the rotation center of the N-pole moving contact.

6. A miniature residual current circuit breaker according to claim 1, characterized in that: An N-pole contact spring is connected between the N-pole moving contact and the circuit breaker housing, and the N-pole contact spring provides contact pressure for the N-pole moving contact. And / or, it also includes an N-pole rotating post disposed on the circuit breaker housing, the N-pole moving contact having an oblong hole, the size of which is larger than the diameter of the N-pole rotating post, the oblong hole being fitted onto the N-pole rotating post to form a rotating configuration of the N-pole moving contact, and the oblong hole and the N-pole rotating post sliding relative to each other during the rotation of the N-pole moving contact; And / or, it also includes a limiting protrusion on the circuit breaker housing, the limiting protrusion being located on the side of the N-pole moving contact to limit the maximum movement distance of the N-pole moving contact; And / or, it also includes the arc-starting angle of the N-pole moving contact and the arc-starting angle of the N-pole stationary contact, wherein the arc-starting angle of the N-pole stationary contact is fixed to the N-pole stationary contact or is an integral part thereof.

7. A miniature residual current circuit breaker according to claim 1, characterized in that: The circuit breaker housing is divided into an L-pole chamber and an N-pole chamber. In the first direction, the L-pole chamber is located on the same side as the N-pole chamber, and the L-pole chamber and the N-pole chamber are separated from each other. The first L-pole structure is disposed in the L-pole chamber, and the N-pole structure is disposed in the N-pole chamber.

8. A miniature residual current circuit breaker according to claim 7, characterized in that: The circuit breaker housing includes a first half-shell and a first sub-shell. The first half-shell has an L-pole region and an N-pole region. The L-pole region is part of the L-pole chamber. The first sub-shell at least covers the N-pole region of the first half-shell and together they form the N-pole chamber. Alternatively, the circuit breaker housing includes a first half-shell and a first sub-shell. The first half-shell has an L-pole region, a first partition and a second partition. The first partition and the second partition are spaced apart in a first direction to form an N-pole region. The L-pole region is part of the L-pole chamber and the N-pole region is part of the N-pole chamber. The linkage passes through the first partition and is connected to the N-pole moving contact.

9. A miniature residual current circuit breaker according to claim 7, characterized in that: The circuit breaker housing is provided with an N-pole exhaust channel, and the N-pole exhaust channel has an N-pole vent on the surface of the circuit breaker housing. The N-pole vent is located on one of the surfaces of the circuit breaker housing in the third direction. And / or, the circuit breaker housing is provided with an N-pole exhaust channel, the N-pole exhaust channel has an N-pole vent on the surface of the circuit breaker housing, and the N-pole exhaust channel has a meandering structure; And / or, the circuit breaker housing is provided with an N-pole exhaust channel, the N-pole exhaust channel has an N-pole vent on the surface of the circuit breaker housing, and the N-pole exhaust channel is provided with an anti-ionization structure.

10. A miniature residual current circuit breaker according to claim 1, characterized in that: There are three L-pole chambers inside the circuit breaker housing. The three L-pole chambers are arranged sequentially along the second direction and separated from each other. The L-pole chamber located on the outer side is the first L-pole chamber. The N-pole chamber is located on one side of the first L-pole chamber in the first direction. The first L-pole structure is located in the first L-pole chamber. In addition to the first L-pole chamber, the other two L-pole chambers are each equipped with a set of L-pole structures. Each L-pole structure includes an L-pole operating mechanism, an L-pole moving contact, and an L-pole stationary contact. The three L-pole operating mechanisms are linked together.

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