Multi-pole circuit breaker

Abstract

The utility model relates to the technical field of circuit breakers, in particular to a multi-pole circuit breaker. The multi-pole circuit breaker comprises a first assembling unit and a second assembling unit. Each of the first assembling unit and the second assembling unit comprises a switching-on and switching-off device and a lock catch. The opening and closing device is rotatably connected in the first assembling unit or the second assembling unit. And one lock catch is connected with one opening and closing device, and the lock catch and the opening and closing device rotate together. And a first tripping rod is arranged in the second assembling unit. One end of the first tripping rod is connected with the lock catch in the second assembly unit, and the first tripping rod and the lock catch in the second assembly unit are of an integrally formed structure, so that the error of the connection depth of the first tripping rod and the lock catch in the first assembly unit is avoided, and the assembly accuracy of the first tripping rod is improved; therefore, the first assembling unit and the second assembling unit are smoothly linked, and the function of protecting the circuit system is achieved. And the other end of the first tripping rod is connected with a lock catch in the first assembly unit.

Description

Technical Field

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

[0002] A multi-pole circuit breaker consists of multiple independent assembly units. The tripping rods between every two adjacent assembly units are connected in sequence, thereby enabling the synchronous breaking or closing of multiple assembly units. This avoids the risk of arcing or voltage imbalance in the circuit system due to asynchronous breaking.

[0003] In related technologies, the trip lever is manually assembled between two adjacent assembly units by the operator. The assembly position of the trip lever cannot be accurately determined, resulting in a large assembly error in the connection between the trip lever and the assembly unit, which leads to the problem of the assembly units not being able to link together. Utility Model Content

[0004] This application provides a multi-pole circuit breaker that improves the assembly accuracy of the trip lever and greatly reduces the assembly error between the trip lever and the assembly unit, thereby enabling smooth linkage between the assembly units in the multi-pole circuit breaker.

[0005] In a first aspect, this application provides a multi-pole circuit breaker, comprising: a first assembly unit and a second assembly unit. Each of the first and second assembly units includes a closing / opening device and a latch. The closing / opening device is rotatably connected to either the first or second assembly unit. A latch is connected to a closing / opening device, causing the latch to rotate together with the device. The second assembly unit is provided with a first tripping rod. One end of the first tripping rod is connected to the latch in the second assembly unit, and the first tripping rod and the latch in the second assembly unit are integrally formed. The other end of the first tripping rod is connected to the latch in the first assembly unit.

[0006] The multi-pole circuit breaker provided in the first aspect of this application includes a first assembly unit and a second assembly unit. The opening and closing devices in the first and second assembly units are used to control the opening and closing actions of the first and second assembly units respectively. The latches in the first and second assembly units are connected together by a first tripping rod disposed in the second assembly unit, so that when a short circuit or overload occurs in either assembly unit, the first and second assembly units can simultaneously perform opening actions, completely disconnecting the current in the multi-pole circuit breaker and protecting the circuit system. The first tripping rod and the latch in the second assembly unit are integrally formed, which avoids errors in the connection depth between the first tripping rod and the latch in the first assembly unit, improving the assembly accuracy of the first tripping rod, thereby enabling the first and second assembly units to smoothly coordinate and protect the circuit system.

[0007] In one possible design, the opening and closing device is equipped with a trip latch. When the latch is engaged with the trip latch, the latch and the trip latch rotate together. When the latch and the trip latch are disconnected, the latch does not rotate together.

[0008] Based on the description of the above embodiments, the opening and closing device is equipped with a trip latch. When the latch is engaged with the trip latch, the latch and the trip latch rotate together, allowing the operator to manually control the assembly unit to perform opening and closing actions. When the latch and the trip latch are disconnected, the latch does not rotate together with the trip latch, preventing the operator from manually controlling the assembly unit to close, thus preventing current from flowing into the assembly unit when it is in a short-circuit or overload state, thereby achieving the function of protecting the circuit breaker and the circuit system.

[0009] In one possible design, the latch has a reset mechanism. The reset mechanism causes the latch to rotate toward the jump catch until the latch engages with the jump catch. The reset mechanism and the latch are integrally formed.

[0010] Based on the description of the above embodiments, the reset structure is disposed on the latch, enabling the reset structure to drive the latch to rotate toward the trip latch until the latch is engaged with the trip latch. This allows the operator to manually control the assembly unit to perform the closing action, ensuring the normal flow of current in the multi-pole circuit breaker and guaranteeing the normal operation of the circuit system. The reset structure and the latch are integrally formed, preventing the reset structure from detaching from the latch and thus preventing it from rotating toward the trip latch. This ensures that the operator can manually control the assembly unit to perform the closing action, thereby guaranteeing the normal operation of the circuit system.

[0011] In one possible design, the multi-pole circuit breaker may further include at least one third assembly unit. The first assembly unit is connected to one side of the second assembly unit along a first direction. At least one third assembly unit is sequentially connected to the other side of the second assembly unit along the first direction. The first direction is the thickness direction of the multi-pole circuit breaker. The third assembly unit is provided with a closing / opening device, a latch, and a second tripping rod. One end of the second tripping rod is connected to the latch in the third assembly unit, and the second tripping rod and the latch in the third assembly unit are integrally formed. The other end of the second tripping rod is connected to the latch in the second assembly unit. Alternatively, the other end of the second tripping rod is connected to the latch in another third assembly unit.

[0012] Based on the description of the above embodiments, the multi-pole circuit breaker may further include at least one third assembly unit. The third assembly unit is equipped with a tripping and closing device, a latch, and a second tripping lever, enabling the third assembly unit to perform tripping and closing actions together with the first and second assembly units. This allows the multi-pole circuit breaker to control the current flow in more lines within the circuit system. Furthermore, the second tripping lever and the latch in the third assembly unit are integrally formed, improving the assembly accuracy of the second tripping lever and allowing the second assembly unit or other third assembly units to smoothly coordinate and protect the circuit system.

[0013] In one possible design, each of the first, second, and third assembly units is provided with a limiting structure. The limiting structure is positioned on the rotation path of the reset structure, preventing the reset structure from rotating further when it comes into contact with the limiting structure.

[0014] Based on the description of the above embodiments, the limiting structure of each assembly unit is set on the rotation path of the reset structure. When the reset structure abuts against the limiting structure, it cannot continue to rotate, so that the rotational potential energy of the reset structure is converted into the kinetic energy stored in the reset structure. This allows the reset structure to drive the latch to rotate toward the trip latch until the latch is engaged with the trip latch. This allows the operator to manually control the assembly unit to perform the closing action, so that the current in the multi-pole circuit breaker can flow normally and ensure the normal operation of the circuit system.

[0015] In one possible design, the reset structure includes a connecting part and an abutting part. One end of the connecting part is connected to the latch. The other end of the connecting part is connected to the abutting part. The abutting part is used to abut against the limiting structure.

[0016] Based on the description of the above embodiments, one end of the connecting part of the reset structure is connected to the latch, allowing the reset structure to rotate together with the latch. The abutting part of the reset structure is used to abut against the limiting structure, and the other end of the connecting part is connected to the abutting part, so that the kinetic energy stored in the abutting part can be transferred to the latch through the connecting part, and drive the latch to rotate toward the trip latch until the latch and the trip latch engage, thereby allowing the trip latch to drive the latch to rotate together. This allows the operator to manually control the assembly unit to perform the closing action, so that the current in the multi-pole circuit breaker can flow normally, ensuring the normal operation of the circuit system.

[0017] In one possible design, the reset structure is made of a material that is both elastic and tough.

[0018] Based on the description of the above embodiments, the reset structure is made of a material with elasticity and toughness, which allows the reset structure to convert the rotational potential energy brought by the impact force into stored kinetic energy, and release the stored kinetic energy after a period of time. Furthermore, the reset structure is made of a material with elasticity and toughness, which allows the reset structure to efficiently absorb impact energy and disperse the impact force, preventing damage or breakage due to excessive impact force, thereby extending the service life of the reset structure.

[0019] In one possible design, the connecting part is a wave-shaped rod structure.

[0020] Based on the description of the above embodiments, the connecting part is a wave-shaped rod structure, which allows the reset structure to further convert the rotational potential energy brought by the impact force into stored kinetic energy. Furthermore, the wave-shaped rod structure can absorb a large amount of impact energy, further preventing damage or breakage of the reset structure due to excessive impact force, thereby extending the service life of the reset structure.

[0021] In one possible design, the surface where the contact part contacts the limiting structure is a curved surface.

[0022] Based on the description of the above embodiments, the surface of the contact part that contacts the limiting structure is curved, which can ensure that the contact part can smoothly contact the limiting structure and store energy smoothly when the reset structure is reset multiple times.

[0023] In one possible design, the first assembly unit, the second assembly unit, and the third assembly unit each include a top cover and a base. The top cover is fastened to the base along a first direction. A limiting structure is provided on the side of the top cover facing the base. A reset structure is provided on the side of the base facing the top cover.

[0024] Based on the description of the above embodiments, the first assembly unit, the second assembly unit, and the third assembly unit include a top cover and a base. The top cover is fastened to the base along a first direction, providing installation space and protection for the assembly units to prevent damage from external forces. A limiting structure is disposed on the side of the top cover facing the base, and a reset structure is disposed on the side of the base facing the top cover. This ensures the normal operation of the reset structure while avoiding further occupation of installation space on the base, thus optimizing the installation space in the multi-pole circuit breaker. Attached Figure Description

[0025] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1This is a schematic diagram of a multi-pole circuit breaker in one embodiment of this application.

[0027] Figure 2 for Figure 1 A view of the explosion along the first direction.

[0028] Figure 3 This is a schematic diagram of a structure of the first assembly unit after the top cover is hidden in an embodiment of this application.

[0029] Figure 4 This is a schematic diagram of a structure of the second assembly unit after the top cover is hidden in an embodiment of this application.

[0030] Figure 5 This is a schematic diagram of one embodiment of the latch, release lever, and reset structure in this application.

[0031] Figure 6 for Figure 4 A magnified view of part A in the middle.

[0032] Figure 7 This is a schematic diagram of one structure of the top cover in an embodiment of this application.

[0033] Explanation of reference numerals in the attached figures:

[0034] 100-Multi-pole circuit breaker;

[0035] 1-First assembly unit; 2-Second assembly unit; 10-Opening and closing device; 11-Handle; 12-Moving contact; 13-Support component; 14-Trigger clip;

[0036] 20-Lock; 21-Snap-fit ​​structure; 70-Short circuit protection device; 80-Overload protection device; 30-First release lever; 40-Reset structure; 41-Connecting part; 42-Abutting part;

[0037] 50 - Top cover; 51 - Limiting structure; 60 - Base;

[0038] X - First direction. Detailed Implementation

[0039] 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, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0040] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein in the specification of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0041] The terms "comprising" and "having," and any variations thereof, used in the specification, claims, and drawings of this application are intended to cover without excluding other terms. The words "a" or "an" do not exclude the presence of multiple terms.

[0042] The term "embodiment" as used herein means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of the phrase "embodiment" in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0043] In this article, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0044] The directional terms appearing in the following description refer to the directions shown in the figures and are not intended to limit the specific structure of this application. For example, in the description of this application, terms such as "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the figures. 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. Therefore, they should not be construed as limitations on this application.

[0045] Furthermore, the descriptions of directions such as the X direction, Y direction, and Z direction used to explain the operation and construction of the components in this embodiment are not absolute but relative. Although these directions are appropriate when the components are in the positions shown in the figure, they should be interpreted differently when these positions change to correspond to the changes.

[0046] Furthermore, the terms "first," "second," etc., in the specification and claims of this application or in the aforementioned drawings are used to distinguish different objects rather than to describe a specific order, and may explicitly or implicitly include one or more of the features.

[0047] In the description of this application, unless otherwise stated, "multiple" means two or more (including two), and similarly, "multiple groups" means two or more (including two groups).

[0048] In the description of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linkage" should be interpreted broadly. For example, "connection" or "linkage" in mechanical structures can refer to a physical connection, such as a fixed connection, for example, a connection fixed by fasteners, such as a connection fixed by screws, bolts, or other fasteners; a physical connection can also be a detachable connection, such as a snap-fit ​​or interlocking connection; a physical connection can also be an integral connection, such as a connection formed by welding, bonding, or integral molding. In circuit structures, "connection" or "linkage" can refer not only to a physical connection but also to an electrical connection or a signal connection. For example, it can be a direct connection, i.e., a physical connection, or an indirect connection through at least one intermediate component, as long as the circuit is connected; it can also refer to the internal connection of two components. Signal connection can refer not only to signal connection through a circuit but also to signal connection through a media, such as radio waves. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0049] A multi-pole circuit breaker is a circuit breaker that can control two or more circuit poles (live wire or neutral wire) at the same time. It is mainly used in multi-phase circuit systems (such as three-phase four-wire systems) or circuit systems that need to disconnect multiple conductors at the same time, thereby providing comprehensive electrical protection for the circuit system.

[0050] A multi-pole circuit breaker consists of multiple independent assembly units. The trip rods between every two adjacent assembly units are connected in sequence, thereby achieving synchronous breaking or closing of multiple poles. This avoids the risk of arcing or voltage imbalance in the circuit system due to asynchronous breaking.

[0051] In related technologies, the trip lever is manually assembled between two adjacent assembly units by the operator. The assembly position of the trip lever cannot be accurately determined, resulting in a large assembly error in the connection between the trip lever and the assembly unit, which leads to the problem of the assembly units not being able to link together.

[0052] Based on this, this application provides a multi-pole circuit breaker, which improves the assembly accuracy of the trip rod and greatly reduces the assembly error between the trip rod and the assembly unit by setting the trip rod and the latch in the assembly unit as an integral molded structure, thereby enabling smooth linkage between the assembly units in the multi-pole circuit breaker.

[0053] in, Figure 1-7 The multi-pole circuit breakers in this application are all 2P circuit breakers. The following application uses a 2P circuit breaker as an example, and combines... Figure 1-7 The present application will now describe some embodiments in detail.

[0054] In a first aspect, this application provides a multi-pole circuit breaker 100, comprising: a first assembly unit 1 and a second assembly unit 2. Each of the first assembly unit 1 and the second assembly unit 2 includes a closing / opening device 10 and a latch 20. The closing / opening device 10 is rotatably connected to either the first assembly unit 1 or the second assembly unit 2. A latch 20 is connected to a closing / opening device 10, causing the latch 20 to rotate together with the closing / opening device 10. The second assembly unit 2 is provided with a first tripping rod 30. One end of the first tripping rod 30 is connected to the latch 20 in the second assembly unit 2, and the first tripping rod 30 and the latch 20 in the second assembly unit 2 are integrally formed. The other end of the first tripping rod 30 is connected to the latch 20 in the first assembly unit 1.

[0055] The multi-pole circuit breaker 100 may include 2P circuit breakers, 3P circuit breakers, and 4P circuit breakers. The 2P circuit breaker consists of two independent assembly units, the 3P circuit breaker consists of three independent assembly units, and the 4P circuit breaker consists of four independent assembly units.

[0056] Specifically, an independent assembly unit can include the following two structures:

[0057] One type of structure is a first assembly unit 1, which may include a switching device 10 and a latch 20.

[0058] Another structure is the second assembly unit 2, which may include a circuit breaker 10, a latch 20 and a first tripping lever 30.

[0059] The opening and closing device 10 may include a handle 11, a moving contact 12, and a support 13.

[0060] Figure 1 This is a schematic diagram of one structure of the multi-pole circuit breaker 100 in an embodiment of this application. Figure 1As shown, a portion of the handle 11 in the first assembly unit 1 and the second assembly unit 2 is disposed inside the assembly unit, while the other portion is exposed outside the assembly unit, making it convenient for the operator to manipulate the portion of the handle 11 exposed outside the assembly unit to rotate the handle 11.

[0061] Figure 2 for Figure 1 A view of the explosion along the first direction X. (e.g.) Figure 2 As shown, the handle 11 in the first assembly unit 1 or the second assembly unit 2 can rotate the moving contact 12 via the locking buckle 20, thereby achieving linkage between the moving contact 12 and the handle 11. When the moving contact 12 rotates clockwise, it approaches the stationary contact until it comes into contact with the stationary contact, allowing current to flow between the stationary contact and the moving contact 12, thus putting the assembly unit in the closed state. When the moving contact 12 rotates counterclockwise, it moves away from the stationary contact until it disconnects from the stationary contact, preventing current from flowing between the stationary contact and the moving contact 12, thus putting the assembly unit in the open state.

[0062] Specifically, Figure 3 This is a schematic diagram of a structure of the first assembly unit 1 after the top cover 50 is hidden in an embodiment of this application. Figure 4 This is a schematic diagram of a structure of the second assembly unit 2 after the top cover 50 is hidden, as described in an embodiment of this application. Figure 3 and Figure 4 As shown, the handle 11 is connected to the support 13 via a connecting rod, enabling the handle 11 to drive the support 13 to rotate. Furthermore, the latch 20 is connected to the support 13, and the moving contact 12 is connected to the latch 20, allowing the moving contact 12 and the latch 20 to rotate together with the support 13. Thus, the handle 11 can be used to actively control the assembly unit to perform opening and closing actions.

[0063] In addition, the handle 11 drives the support 13 to rotate, and the support 13, the latch 20 and the moving contact 12 rotate together. Therefore, the rotation of the handle 11, the moving contact 12 and the support 13 can be summarized as the circuit breaker 10 being rotatably connected in the first assembly unit 1 or the second assembly unit 2.

[0064] Furthermore, in addition to actively controlling the assembly unit to trip via handle 11, the assembly unit can automatically trip in the following two situations to protect the circuit breaker and its external circuit system:

[0065] Scenario 1: When a short circuit occurs in the first assembly unit 1 or the second assembly unit 2, such as Figure 3 and Figure 4 The short-circuit protection device 70 shown can promptly cause the opening and closing device 10 in the first assembly unit 1 or the second assembly unit 2 to perform the opening action, so as to protect the circuit breaker and the circuit system.

[0066] Scenario 2: When an overload occurs in either the first assembly unit 1 or the second assembly unit 2, such as... Figure 3 and Figure 4 The overload protection device 80 shown can promptly cause the circuit breaker and circuit system protection device 10 in the first assembly unit 1 or the second assembly unit 2 to perform the opening and closing action.

[0067] Specifically, when a short circuit occurs in the first assembly unit 1 or the second assembly unit 2, the short circuit protection device 70 can push the latch 20 in the first assembly unit 1 or the second assembly unit 2 to rotate away from the stationary contact, thereby causing the moving contact 12 to disconnect from the stationary contact, so that the first assembly unit 1 or the second assembly unit 2 can perform a tripping operation.

[0068] Similarly, when an overload occurs in the first assembly unit 1 or the second assembly unit 2, the overload protection device 80 can push the latch 20 in the first assembly unit 1 or the second assembly unit 2 to rotate away from the stationary contact, thereby causing the moving contact 12 to disconnect from the stationary contact, so that the first assembly unit 1 or the second assembly unit 2 can perform a tripping action.

[0069] Furthermore, the first assembly unit 1 and the second assembly unit 2 need to perform the tripping action synchronously to completely disconnect the current in the multi-pole circuit breaker 100, thereby avoiding the risk of arcing or voltage imbalance in the circuit system due to asynchronous tripping and thus protecting the circuit system.

[0070] Based on this, such as Figure 4 As shown, the second assembly unit 2 may also be equipped with a first release lever 30. Wherein, as... Figure 2 As shown, one end of the first release lever 30 is connected to the latch 20 in the second assembly unit 2, and the other end of the first release lever 30 is connected to the latch 20 in the first assembly unit 1, so that the latch 20 in the first assembly unit 1 and the latch 20 in the second assembly unit 2 can rotate together through the first release lever 30.

[0071] Specifically, when the first assembly unit 1 trips due to a short circuit or overload, the latch 20 in the first assembly unit 1 drives the first trip lever 30 to rotate, which in turn drives the latch 20 in the second assembly unit 2 to rotate, thus causing the second assembly unit 2 to trip simultaneously, achieving simultaneous tripping of the first assembly unit 1 and the second assembly unit 2. When the second assembly unit 2 trips due to a short circuit or overload, the first trip lever 30 will drive the first assembly unit 1 to trip simultaneously.

[0072] Due to the specification limitations of the multi-pole circuit breaker 100, the distance between the first assembly unit 1 and the second assembly unit 2 is fixed. Therefore, the length of the first tripping rod 30 connecting the first assembly unit 1 and the second assembly unit 2 also needs to be limited. Specifically, the range of the length L of the first tripping rod 30 can be: 6.5mm ≤ L ≤ 7.5mm.

[0073] In related technologies, the operator installs the first release lever 30 into the latch 20 in the second assembly unit 2, and makes the first release lever 30 and the latch 20 in the second assembly unit 2 interference fit so that the first release lever 30 and the latch 20 in the second assembly unit 2 can rotate together. However, since the connection depth between the first release lever 30 and the latch 20 in the second assembly unit 2 is manually controlled by the operator, the accuracy of its assembly cannot be guaranteed, and the length of the first release lever 30 is a fixed value. Therefore, there will be a large error in the connection depth between the first release lever 30 and the latch 20 in the first assembly unit 1.

[0074] Specifically, when the connection depth between the first release lever 30 and the latch 20 in the first assembly unit 1 is too long or even exceeds the distance between the first assembly unit 1 and the second assembly unit 2, the first release lever 30 will abut against the latch 20 in the first assembly unit 1, causing the latch 20 of the first assembly unit 1 and the latch 20 of the second assembly unit 2 to lock together, thereby preventing the first assembly unit 1 and the second assembly unit 2 from rotating together.

[0075] When the connection depth between the first release lever 30 and the latch 20 in the first assembly unit 1 is too short, the contact area between the first release lever 30 and the latch 20 in the first assembly unit 1 is small, which reduces the force exerted by the first release lever 30 on the latch 20 in the first assembly unit 1. This results in relative sliding between the first release lever 30 and the latch 20 in the first assembly unit 1, preventing the first assembly unit 1 and the second assembly unit 2 from rotating together.

[0076] Based on this, such as Figure 5 As shown, the first tripping rod 30 and the latch 20 in the second assembly unit 2 are integrally formed, ensuring a fixed connection depth between them. This avoids errors in the connection depth between the first tripping rod 30 and the latch 20 in the first assembly unit 1, improving the assembly accuracy of the first tripping rod 30 and ensuring smooth linkage between the first assembly unit 1 and the second assembly unit 2. In other words, it ensures that the first assembly unit 1 and the second assembly unit 2 simultaneously perform tripping actions, thereby completely disconnecting the current in the multi-pole circuit breaker 100 and protecting the circuit system. Figure 5 This is a schematic diagram of one embodiment of the latch 20, the release lever, and the reset structure 40 in this application.

[0077] When both the first release lever 30 and the latch 20 in the second assembly unit 2 are made of metal, they can be integrally formed through a casting process. When both the first release lever 30 and the latch 20 in the second assembly unit 2 are made of non-metallic materials, they can be integrally formed through an injection molding process.

[0078] Preferably, both the first release lever 30 and the latch 20 in the second assembly unit 2 are made of non-metallic materials, which can effectively reduce product costs and processing difficulty. Specifically, the first release lever 30 and the latch 20 in the second assembly unit 2 can be made of engineering plastics with high structural strength (e.g., polyamide 46 and polyphenylene sulfide).

[0079] Furthermore, such as Figure 2 As shown, the first release lever 30 is detachably connected to the latch 20 in the first assembly unit 1, making the first assembly unit 1 and the second assembly unit 2 independent modules, which facilitates the replacement and maintenance of the first assembly unit 1 and the second assembly unit 2 separately, thereby reducing the maintenance cost of the multi-pole circuit.

[0080] In summary, the multi-pole circuit breaker provided in the first aspect of this application includes: a first assembly unit 1 and a second assembly unit 2. The opening and closing devices 10 in the first assembly unit 1 and the second assembly unit 2 are used to control the opening and closing actions of the first assembly unit 1 and the second assembly unit 2, respectively. The latches 20 in the first assembly unit 1 and the second assembly unit 2 are connected together by a first tripping rod 30 disposed in the second assembly unit 2, so that when a short circuit or overload occurs in either assembly unit, the first assembly unit 1 and the second assembly unit 2 can simultaneously perform opening actions, completely disconnecting the current in the multi-pole circuit breaker 100, thus protecting the circuit system. The first tripping rod 30 and the latches 20 in the second assembly unit 2 are integrally formed, which avoids errors in the connection depth between the first tripping rod 30 and the latches 20 in the first assembly unit 1, improving the assembly accuracy of the first tripping rod 30, thereby enabling the first assembly unit 1 and the second assembly unit 2 to smoothly coordinate and protect the circuit system.

[0081] In some embodiments, the opening and closing device 10 is provided with a trip latch 14. When the latch 20 is engaged with the trip latch 14, the latch 20 and the trip latch 14 rotate together. When the latch 20 is disconnected from the trip latch 14, the latch 20 does not rotate together with the trip latch 14.

[0082] Specifically, such as Figure 3 and Figure 6As shown, the trip latch 14 is mounted on the support member 13 in the opening and closing device 10, allowing the trip latch 14 to rotate together with the support member 13. Figure 6 for Figure 4 A magnified view of part A in the middle.

[0083] Furthermore, such as Figure 6 As shown, the latch 20 is rotatably connected to the support 13, allowing relative rotation between the latch 20 and the support 13, thereby allowing relative rotation between the latch 20 and the jumper 14. Further details can be found in the references provided. Figure 6 The latch 20 has a protrusion extending toward the trip latch 14, and the protrusion has a snap-fit ​​structure 21 for snapping with the trip latch 14. When the latch 20 is snapped with the trip latch 14, the latch 20 and the trip latch 14 can rotate together. That is, at this time, the operator can control the rotation of the support member 13 and the trip latch 14 through the handle 11 to control the rotation of the latch 20, thereby controlling the assembly unit to perform opening and closing actions.

[0084] Furthermore, when the assembly unit automatically trips due to a short circuit or overload, the operator cannot control the assembly unit to close the circuit through the handle 11, thus preventing the assembly unit from being connected to current when it is in a short circuit or overload state, thereby protecting the circuit breaker and the circuit system.

[0085] Based on this, the latch 20 can be disconnected from the jumper 14, and the latch 20 will not rotate together with the jumper 14, so that the handle 11 cannot drive the latch 20 to rotate when it rotates, thereby preventing the handle 11 from controlling the assembly unit to perform the closing action.

[0086] Specifically, the short-circuit protection device 70 can rotate the latch 20 relative to the support member 13 until the latch 20 is disconnected from the trip latch 14. Similarly, the overload protection device 80 can rotate the latch 20 relative to the support member 13 until the latch 20 is disconnected from the trip latch 14.

[0087] According to the description of the above embodiment, the opening and closing device 10 is provided with a trip latch 14. When the latch 20 is engaged with the trip latch 14, the latch 20 and the trip latch 14 rotate together, allowing the operator to manually control the assembly unit to perform opening and closing actions. When the latch 20 is disconnected from the trip latch 14, the latch 20 does not rotate with the trip latch 14, preventing the operator from manually controlling the assembly unit to close, thus preventing current from flowing into the assembly unit when it is in a short-circuit or overload state, thereby achieving the function of protecting the circuit breaker and the circuit system.

[0088] In some embodiments, the latch 20 is provided with a reset structure 40. The reset structure 40 causes the latch 20 to rotate toward the jumper 14 until the latch 20 is engaged with the jumper 14. The reset structure 40 and the latch 20 are integrally formed.

[0089] As described above, when the assembly unit is in a short-circuit or overload state, the latch 20 and the trip latch 14 are disconnected, and the operator cannot control the assembly unit to close by turning the handle 11. However, when the assembly unit returns to normal from the short-circuit or overload state, the multi-pole circuit breaker 100 still needs to control the assembly unit to close by turning the handle 11 to ensure that the current in the multi-pole circuit breaker 100 can flow normally, thereby ensuring the normal operation of the circuit system.

[0090] Based on this, such as Figure 5 As shown, the latch 20 is provided with a reset structure 40. (As indicated...) Figure 6 As shown, the reset structure 40 can drive the latch 20 to rotate toward the jumper 14 until the latch 20 is engaged with the jumper 14.

[0091] Specifically, the reset structure 40 can store kinetic energy during the opening process. When the assembly unit returns to the normal state from the short-circuit or overload state, the kinetic energy stored in the reset structure 40 is released as a force opposite to the opening direction, causing the reset structure 40 to drive the latch 20 to rotate toward the trip latch 14 until the latch 20 engages with the trip latch 14. This allows the trip latch 14 to drive the latch 20 to rotate together, enabling the operator to manually control the assembly unit to perform the closing action, so that the current in the multi-pole circuit breaker 100 can flow normally, ensuring the normal operation of the circuit system.

[0092] Furthermore, such as Figure 5 As shown, the reset structure 40 and the latch 20 are integrally formed to prevent the reset structure 40 from falling off the latch 20 and being unable to drive the latch 20 to rotate toward the trip latch 14. This ensures that the operator can manually control the assembly unit to perform the closing action, thereby ensuring the normal operation of the circuit system.

[0093] As described in the above embodiment, the reset structure 40 is disposed on the latch 20, enabling the reset structure 40 to drive the latch 20 to rotate toward the trip latch 14 until the latch 20 is engaged with the trip latch 14. This allows the operator to manually control the assembly unit to perform the closing action, ensuring the normal flow of current in the multi-pole circuit breaker 100 and guaranteeing the normal operation of the circuit system. The reset structure 40 and the latch 20 are integrally formed to prevent the reset structure 40 from detaching from the latch 20 and thus preventing it from rotating toward the trip latch 14. This ensures that the operator can manually control the assembly unit to perform the closing action, thereby guaranteeing the normal operation of the circuit system.

[0094] In some embodiments, the multi-pole circuit breaker 100 may further include at least one third assembly unit (not shown in the figure). A first assembly unit 1 is connected to one side of a second assembly unit 2 along a first direction X. At least one third assembly unit is sequentially connected to the other side of the second assembly unit 2 along the first direction X. Wherein, the first direction X is the thickness direction of the multi-pole circuit breaker 100. The third assembly unit is provided with a closing / opening device 10, a latch 20, and a second tripping rod (not shown in the figure). One end of the second tripping rod is connected to the latch 20 in the third assembly unit, and the second tripping rod and the latch 20 in the third assembly unit are integrally formed. The other end of the second tripping rod is connected to the latch 20 in the second assembly unit 2. Alternatively, the other end of the second tripping rod is connected to the latch 20 in another third assembly unit.

[0095] In addition to 2P circuit breakers, the multi-pole circuit breaker 100 may also include 3P and 4P circuit breakers. Compared to a 2P circuit breaker, a 3P circuit breaker may include a first assembly unit 1, a second assembly unit 2, and a third assembly unit. A 4P circuit breaker may include a first assembly unit 1, a second assembly unit 2, and two third assembly units.

[0096] The first assembly unit 1 can be connected to one side of the second assembly unit 2 along the first direction X. At least one third assembly unit can be sequentially connected to the other side of the second assembly unit 2 along the first direction X. For example... Figure 1 and Figure 2 As shown, the first direction X is the thickness direction of the multi-pole circuit breaker 100.

[0097] The third assembly unit is equipped with a circuit breaker / closer device 10, a latch 20, and a second release lever. The circuit breaker / closer device 10 and the latch 20 in the third assembly unit work together to control the circuit breaker / closer actions of the third assembly unit.

[0098] Furthermore, at least one third assembly unit needs to synchronously perform a tripping operation with the first assembly unit 1 and the second assembly unit 2 to completely disconnect the current in the multi-pole circuit breaker 100, thereby protecting the circuit system. Simultaneously, at least one third assembly unit needs to synchronously perform a closing operation with the first assembly unit 1 and the second assembly unit 2 to ensure that the current in each assembly unit of the multi-pole circuit breaker 100 can flow normally, thus guaranteeing the normal operation of the circuit system.

[0099] As can be seen from the above, the latch 20 in the first assembly unit 1 and the latch 20 in the second assembly unit 2 can rotate together through the first release rod 30, thereby enabling the first assembly unit 1 and the second assembly unit 2 to perform opening and closing actions synchronously.

[0100] Similarly, a second tripping lever can also be provided in the third assembly unit. One end of the second tripping lever is connected to the latch 20 in the third assembly unit, and the other end of the second tripping lever is connected to the latch 20 in the second assembly unit 2 or other third assembly units. This allows the latch 20 in the third assembly unit and the latch 20 in the second assembly unit 2 or other third assembly units to rotate together through the second tripping lever, thereby enabling the second assembly unit 2 and the third assembly unit to perform opening and closing actions synchronously, and enabling multiple third assembly units to perform opening and closing actions synchronously.

[0101] In summary, the first assembly unit 1, the second assembly unit 2, and multiple third assembly units can simultaneously perform opening and closing actions through the first trip lever 30 and the second trip lever. This can completely disconnect the current in the multi-pole circuit breaker 100, thereby protecting the circuit system, and also ensure that the current in each assembly unit of the multi-pole circuit breaker 100 can flow normally, thus guaranteeing the normal operation of the circuit system.

[0102] Obviously, compared to a multi-pole circuit breaker 100 with only a first assembly unit 1 and a second assembly unit 2, adding at least one third assembly unit allows the multi-pole circuit breaker 100 to control the current switching on and off in more lines in the circuit system.

[0103] It should be noted that the first assembly unit 1 includes a circuit breaker / closer device 10 and a latch 20. The second assembly unit 2 and the third assembly unit include the circuit breaker / closer device 10, the latch 20, a first tripping lever 30, and a second tripping lever. The structures of the first tripping lever 30 and the second tripping lever can be completely identical; that is, the structures of the second assembly unit 2 and the third assembly unit can be completely identical. Therefore, based on the structure of the assembly units, they can be divided into assembly units with tripping levers (e.g., the first assembly unit 1) and assembly units without tripping levers (e.g., the second assembly unit 2 and the third assembly unit).

[0104] However, since the release lever in the second assembly unit 2 is used to connect assembly units without release levers (e.g., the first assembly unit 1), and the release lever in the third assembly unit is used to connect assembly units with release levers (e.g., the second assembly unit 2 and other third assembly units), to distinguish the connection relationships between the assembly units, the assembly unit connected to the assembly unit without a release lever can be called the second assembly unit 2, and the assembly unit connected to the assembly unit with a release lever can be called the third assembly unit. Further, for ease of description, the release lever in the second assembly unit 2 can be called the first release lever 30, and the release lever in the third assembly unit can be called the second release lever.

[0105] Therefore, similar to the first trip lever 30, the second trip lever and the latch 20 in the third assembly unit are integrally formed, which improves the assembly accuracy of the second trip lever and ensures that the third assembly unit and the second assembly unit 2 or other third assembly units can be smoothly linked. In other words, it can ensure that the third assembly unit and the second assembly unit 2 or other third assembly units perform tripping actions simultaneously, thereby completely disconnecting the current in the multi-pole circuit breaker 100 and protecting the circuit system.

[0106] Similarly, when both the second trip lever and the latch 20 in the third assembly unit are made of metal, they can be integrally molded using a casting process. When both the second trip lever and the latch 20 in the third assembly unit are made of non-metallic materials, they can be integrally molded using an injection molding process.

[0107] Preferably, both the second tripping lever and the latch 20 in the third assembly unit are made of non-metallic materials, which can effectively reduce product costs and processing difficulty. Specifically, the second tripping lever and the latch 20 in the third assembly unit can be made of engineering plastics with high structural strength (e.g., polyamide 46 and polyphenylene sulfide).

[0108] In addition, the second release lever is detachably connected to the latch 20 in the second assembly unit 2 or other third assembly unit, so that the second assembly unit 2 or other third assembly unit and the third assembly unit are independent modules, which facilitates the replacement and maintenance of the second assembly unit 2 and at least one third assembly unit separately, thereby reducing the maintenance cost of the multi-pole circuit.

[0109] In summary, the multi-pole circuit breaker 100 may further include at least one third assembly unit. The third assembly unit is equipped with a tripping / closing device 10, a latch 20, and a second tripping lever, enabling the third assembly unit to perform tripping and closing actions together with the first assembly unit 1 and the second assembly unit 2. This allows the multi-pole circuit breaker 100 to control the current flow in more lines within the circuit system. Furthermore, the second tripping lever and the latch 20 in the third assembly unit are integrally formed, improving the assembly accuracy of the second tripping lever and allowing the second assembly unit 2 or other third assembly units to smoothly coordinate and protect the circuit system.

[0110] In some embodiments, each of the first assembly unit 1, the second assembly unit 2, and the third assembly unit is provided with a limiting structure 51. The limiting structure 51 is disposed on the rotation path of the reset structure 40, so that the reset structure 40 cannot continue to rotate when it abuts against the limiting structure 51.

[0111] As can be seen from the above, the reset structure 40 can store kinetic energy during the opening process.

[0112] Specifically, when the assembly unit trips due to a short circuit or overload, the short circuit protection device 70 or the overload protection device 80 can drive the latch 20 to rotate relative to the support member 13. The reset structure 40 and the latch 20 are an integral structure, so the reset structure 40 can rotate together with the latch 20.

[0113] Based on this, such as Figure 7 As shown, a limiting structure 51 can be set on the rotation path of the reset structure 40, so that the reset structure 40 abuts against the limiting structure 51 and cannot continue to rotate. The reset structure 40, unable to continue rotating, still possesses rotational potential energy, which can be converted into kinetic energy stored in the reset structure 40. Figure 7 This is a schematic diagram of one structure of the top cover 50 in an embodiment of this application.

[0114] According to the description of the above embodiments, the limiting structure 51 of each assembly unit is set on the rotation path of the reset structure 40. When the reset structure 40 abuts against the limiting structure 51, it cannot continue to rotate, so that the rotational potential energy of the reset structure 40 is converted into the kinetic energy stored in the reset structure 40. This allows the reset structure 40 to drive the latch 20 to rotate toward the trip latch 14 until the latch 20 is engaged with the trip latch 14. This allows the operator to manually control the assembly unit to perform the closing action, so that the current in the multi-pole circuit breaker 100 can flow normally and ensure the normal operation of the circuit system.

[0115] In some embodiments, the reset structure 40 includes a connecting portion 41 and an abutting portion 42. One end of the connecting portion 41 is connected to the latch 20. The other end of the connecting portion 41 is connected to the abutting portion 42. The abutting portion 42 is used to abut against the limiting structure 51.

[0116] like Figure 5 and Figure 6 As shown, the reset structure 40 may include a connecting portion 41 and an abutting portion 42. One end of the connecting portion 41 is connected to the latch 20, allowing the reset structure 40 to rotate together with the latch 20. The other end of the connecting portion 41 is connected to the abutting portion 42, which abuts against the limiting structure 51, allowing the kinetic energy stored in the abutting portion 42 to be transferred to the latch 20 through the connecting portion 41, and causing the latch 20 to rotate toward the jumper 14.

[0117] According to the description of the above embodiment, one end of the connecting part 41 of the reset structure 40 is connected to the latch 20, so that the reset structure 40 can rotate together with the latch 20. The abutting part 42 of the reset structure 40 is used to abut against the limiting structure 51, and the other end of the connecting part 41 is connected to the abutting part 42, so that the kinetic energy stored in the abutting part 42 can be transferred to the latch 20 through the connecting part 41, and drive the latch 20 to rotate toward the trip latch 14 until the latch 20 and the trip latch 14 are engaged, so that the trip latch 14 can drive the latch 20 to rotate together, thereby allowing the operator to manually control the assembly unit to perform the closing action, so that the current in the multi-pole circuit breaker 100 can flow normally and ensure the normal operation of the circuit system.

[0118] Furthermore, there is a certain distance between the limiting structure 51 and the latch 20. Therefore, the connecting part 41 can be a long rod structure, so that the abutting part 42 extends in the direction of the limiting structure 51, so that while the reset structure 40 is connected to the latch 20, the abutting part 42 can abut against the limiting structure 51 when rotating.

[0119] In some embodiments, the reset structure 40 is made of a material that is elastic and tough.

[0120] Materials possessing both elasticity and toughness can store the energy of external impacts as kinetic energy and delay its release. When such materials are subjected to external impacts, their elasticity allows 60%-80% of the impact force to be converted into kinetic energy and stored in the deformation of the material's molecular chemical bonds. Furthermore, the material's toughness allows the kinetic energy stored in the molecular chemical bonds to be gradually released through the relaxation of the molecular chains within the material.

[0121] Since the reset structure 40 comes into contact with the limiting structure 51 when it rotates, it will be subjected to the impact force from the limiting structure 51. Therefore, the material of the reset structure 40 is an elastic and tough material, which allows the reset structure 40 to convert the rotational potential energy brought by the impact force into stored kinetic energy, and release the stored kinetic energy after a period of time.

[0122] On the other hand, the reset structure 40 is subjected to impact forces from the limiting structure 51, which may cause the reset structure 40 to be damaged or broken due to the impact force. Therefore, the material of the reset structure 40 is an elastic and tough material, which can also buffer the impact force of the limiting structure 51.

[0123] Specifically, materials with elasticity and toughness can efficiently absorb impact energy and disperse impact force, preventing the reset structure 40 from being damaged or broken due to excessive impact force, thereby extending the service life of the reset structure 40.

[0124] As described in the above embodiments, the reset structure 40 is made of a material with elasticity and toughness, which allows the reset structure 40 to convert the rotational potential energy brought by the impact force into stored kinetic energy, and release the stored kinetic energy after a period of time. Furthermore, the material of the reset structure 40 is elastic and tough, which allows the reset structure 40 to efficiently absorb impact energy and disperse the impact force, preventing damage or breakage of the reset structure 40 due to excessive impact force, thereby extending the service life of the reset structure 40.

[0125] Specifically, the material of the resetting structure 40 can be an engineering plastic with high elasticity and high toughness (e.g., polyoxymethylene).

[0126] In some embodiments, the connecting part 41 is a wave-shaped rod-like structure.

[0127] Among them, such as Figure 5 and Figure 6 As shown, the wave-shaped rod structure may include multiple U-shaped units connected in sequence. The impact force on the reset structure 40 will trigger the symmetry breaking of the above-mentioned U-shaped units (such as the sine wave peak being flattened). At this time, 60% of the impact force can be converted into kinetic energy and stored in the curvature change of the curved arc segment of the U-shaped unit.

[0128] Therefore, the connecting part 41 is a wave-shaped rod structure, which can further convert the impact force borne by the reset structure 40 into stored kinetic energy.

[0129] On the other hand, the wave-shaped rod structure has a wave-folding effect, which can absorb a large amount of impact energy, further preventing the reset structure 40 from being damaged or broken due to excessive impact force, thereby extending the service life of the reset structure 40.

[0130] As described in the above embodiment, the connecting part 41 is a wave-shaped rod-like structure, which allows the reset structure 40 to further convert the rotational potential energy brought by the impact force into stored kinetic energy. Furthermore, the wave-shaped rod-like structure can absorb a large amount of impact energy, further preventing the reset structure 40 from being damaged or broken due to excessive impact force, thereby extending the service life of the reset structure 40.

[0131] In some embodiments, the surface of the abutment portion 42 that contacts the limiting structure 51 is a curved surface.

[0132] As described above, the contact part 42 rotates together with the reset structure 40. When multiple short circuits or overloads occur in the assembly unit, the contact part 42 will also rotate multiple times to achieve multiple resets. During the multiple rotations of the contact part 42, the position where the contact part 42 contacts the limiting structure 51 will be different when the rotation stops.

[0133] Based on this, the surface of the contact part 42 that contacts the limiting structure 51 can be a curved surface. When the contact part 42 stops rotating, the position of contact with the limiting structure 51 changes, but there are still multiple tangent points on the curved surface of the contact part 42 that can contact the limiting structure 51, thereby ensuring that the contact part 42 can smoothly contact the limiting structure 51 and store energy smoothly.

[0134] Specifically, such as Figure 5 and Figure 6 As shown, the contact portion 42 can be a spherical structure or an ellipsoidal structure, so that when any part of the contact portion 42 comes into contact with the limiting structure 51, the contact surface of the contact portion 42 is a curved surface.

[0135] According to the description of the above embodiment, the surface of the contact part 42 that contacts the limiting structure 51 is curved, which can ensure that the contact part 42 can smoothly contact the limiting structure 51 and store energy smoothly when the reset structure 40 is reset more than once.

[0136] In some embodiments, the first assembly unit 1, the second assembly unit 2, and the third assembly unit each include a top cover 50 and a base 60. The top cover 50 is fastened to the base 60 along a first direction X. A limiting structure 51 is disposed on the side of the top cover 50 facing the base 60. A reset structure 40 is disposed on the side of the base 60 facing the top cover 50.

[0137] The first assembly unit 1, the second assembly unit 2, and the third assembly unit all include a top cover 50 and a base 60. For example... Figure 2 As shown, the top cover 50 is fastened to the base 60 along the first direction X, forming a receiving cavity between the base 60 and the top cover 50. This cavity is used to accommodate the first assembly unit 1, the second assembly unit 2, or the third assembly unit, providing installation space and protection for the assembly units and preventing damage from external forces. The first direction X is... Figure 1 and Figure 2 Thickness direction of multi-stage circuit breakers.

[0138] Furthermore, the reset structure 40 in each assembly unit can be disposed on the side of the base 60 facing the top cover 50. Meanwhile, as... Figure 7 As shown, the limiting structure 51 can be set on the side of the top cover 50 facing the base 60. When the top cover 50 is fastened to the base 60, the limiting structure 51 can be on the rotation trajectory of the reset structure 40. This ensures that the reset structure 40 can work normally while avoiding further occupying the installation space on the base 60, thus optimizing the installation space in the multi-pole circuit breaker 100.

[0139] According to the description of the above embodiments, the first assembly unit 1, the second assembly unit 2, and the third assembly unit include a top cover 50 and a base 60. The top cover 50 is fastened to the base 60 along a first direction X, providing installation space and protection for the assembly units and preventing damage to the assembly units due to external forces. A limiting structure 51 is disposed on the side of the top cover 50 facing the base 60, and a reset structure 40 is disposed on the side of the base 60 facing the top cover 50. This allows for the reset structure 40 to function normally while avoiding further encroachment on the installation space on the base 60, thus optimizing the installation space in the multi-pole circuit breaker 100.

[0140] Those skilled in the art will understand that although some embodiments herein include certain features included in other embodiments but not others, combinations of features from different embodiments are intended to be within the scope of this application and form different embodiments. For example, in the claims, any of the claimed embodiments can be used in any combination.

[0141] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. A multi-pole circuit breaker, characterized by, include: First assembly unit and second assembly unit; The first assembly unit and the second assembly unit each include a switching device and a latch; The opening and closing device is rotatably connected in the first assembly unit or the second assembly unit; One of the latches is connected to one of the opening and closing devices, so that the latch rotates together with the opening and closing device; The second assembly unit is equipped with a first release lever; One end of the first release lever is connected to the latch in the second assembly unit, and the first release lever and the latch in the second assembly unit are integrally formed. The other end of the first release lever is connected to the latch in the first assembly unit.

2. The multi-pole circuit breaker of claim 1, wherein, The circuit breaker is equipped with a trip latch. When the latch is engaged with the jumper, the latch and the jumper rotate together; When the latch is disconnected from the jumper, the latch does not rotate together with the jumper.

3. The multi-pole circuit breaker of claim 2, wherein, The latch is provided with a reset structure; The reset structure causes the latch to rotate toward the jumper until the latch engages with the jumper. The reset structure and the latch are integrally formed.

4. The multi-pole circuit breaker of claim 3, wherein, It also includes at least one third assembly unit; The first assembly unit is connected to one side of the second assembly unit along a first direction; At least one of the third assembly units is sequentially connected to the other side of the second assembly unit along the first direction; Wherein, the first direction is the thickness direction of the multi-pole circuit breaker; The third assembly unit is equipped with the opening and closing device, the latch, and the second release lever; One end of the second release lever is connected to the latch in the third assembly unit, and the second release lever and the latch in the third assembly unit are integrally formed. The other end of the second release lever is connected to the latch in the second assembly unit; or; The other end of the second release lever is connected to a latch in another of the third assembly units.

5. The multi-pole circuit breaker of claim 4, wherein, Each of the first assembly unit, the second assembly unit, and the third assembly unit is provided with a limiting structure; The limiting structure is positioned on the rotation path of the reset structure, preventing the reset structure from rotating further when it comes into contact with the limiting structure.

6. The multi-pole circuit breaker according to claim 5, characterized in that, The reset structure includes a connecting part and an abutting part; One end of the connecting part is connected to the latch, and the other end of the connecting part is connected to the abutting part; The abutting part is used to abut against the limiting structure.

7. The multi-pole circuit breaker of claim 6, wherein, The reset structure is made of a material that is both elastic and tough.

8. The multi-pole circuit breaker of claim 7, wherein, The connecting part is a wave-shaped rod-like structure.

9. The multi-pole circuit breaker of claim 8, wherein, The surface of the contact portion that contacts the limiting structure is a curved surface.

10. The multi-pole circuit breaker of claim 5, wherein, The first assembly unit, the second assembly unit, and the third assembly unit all include a top cover and a base; The top cover is fastened to the base along the first direction; The limiting structure is disposed on the side of the top cover facing the base; The reset structure is disposed on the side of the base facing the top cover.

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