A circuit breaker

Abstract

The application provides a circuit breaker, and relates to the technical field of electrical equipment. The circuit breaker comprises a chassis, a safety door assembly and a transmission assembly. The safety door assembly comprises a first door body and a second door body which overlap. The first door body is movably arranged on the chassis, and the second door body is movably arranged on the first door body. The first door body is provided with a first through hole, and the second door body is provided with a second through hole. The transmission assembly comprises a transmission member, a sliding member and a first reset member. The transmission member is arranged on the first door body and is in transmission cooperation with the sliding member at the other end. The sliding member is movably arranged on the first door body. The first reset member is connected with the sliding member, and the sliding member is connected with the second door body. The transmission member is used for driving the sliding member to move so as to drive the second door body to displace relative to the first door body, so that the first through hole and the second through hole correspond. The first reset member is used for driving the sliding member to move reversely after the driving force acting on the transmission member is removed, so that the first through hole and the second through hole are misaligned.

Description

Technical Field

[0001] This invention relates to the field of electrical equipment technology, and more specifically, to a circuit breaker. Background Technology

[0002] Drawer-type circuit breakers are widely used in various power distribution systems because they allow for maintenance or replacement without interrupting the main circuit power supply. To ensure operator safety, these circuit breakers are typically equipped with a safety door mechanism: when the circuit breaker moves from the connected position to the test position, the safety door should automatically close, shielding the energized external busbars on the base frame; when the circuit breaker moves from the test position to the connected position, the safety door should open simultaneously to allow the insert to be smoothly inserted and reliably connected to the bridge contact.

[0003] However, existing security door mechanisms are complex in structure and have a large number of parts, which leads to complicated assembly, high manufacturing costs, and problems such as jamming and failure after long-term operation, affecting safety and reliability. Summary of the Invention

[0004] The purpose of this invention is to provide a circuit breaker that has a simple structure, reliable and coordinated operation, convenient assembly, and stable long-term operation.

[0005] The embodiments of the present invention are implemented as follows:

[0006] In a first aspect, the present invention provides a circuit breaker, comprising:

[0007] Base frame;

[0008] A safety door assembly, comprising an overlapping first door body and a second door body, wherein the first door body is movably disposed on the base frame, the second door body is movably disposed on the first door body, the first door body is provided with a first through hole, and the second door body is provided with a second through hole;

[0009] A transmission assembly, comprising a transmission component, a sliding component, and a first reset component, wherein the transmission component is disposed on the first door body and the other end is in transmission cooperation with the sliding component, the sliding component is movably disposed on the first door body, the first reset component is connected to the sliding component, and the sliding component is connected to the second door body;

[0010] The transmission member is used to drive the sliding member to move, thereby displacing the second door body relative to the first door body so that the first through hole and the second through hole correspond. The first reset member is used to drive the sliding member to move in the opposite direction after the driving force acting on the transmission member is removed, so that the first through hole and the second through hole are misaligned.

[0011] In an optional embodiment, the transmission component is provided with a first abutting part, a transmission part, and a rotating shaft. The first abutting part and the transmission part are respectively located on both sides of the rotating shaft. The transmission part is in transmission cooperation with the sliding member. The transmission component is rotatably disposed on the first door body through the rotating shaft. The first abutting part is used to drive the transmission part to rotate around the rotating shaft when it is abutted, so as to drive the sliding member and the second door body to move synchronously.

[0012] In an optional embodiment, the sliding member is provided with a connecting rod, the first door body is provided with a clearance hole, the connecting rod passes through the clearance hole and connects to the second door body, the clearance hole is an oblong hole structure, and the second door body can move along the extension direction of the clearance hole under the drive of the connecting rod, so that the first through hole and the second through hole correspond.

[0013] In an optional embodiment, the end of the connecting rod is provided with a first connecting part, and the second door body is provided with a second connecting part. The second connecting part is a hole or groove structure, and the first connecting part and the second connecting part are fixedly engaged.

[0014] In an optional embodiment, the slider is provided with a sliding portion in the form of a hole or a groove, and the end of the transmission portion slides in cooperation with the sliding portion.

[0015] In an optional embodiment, the base frame is provided with a second abutment portion. When the first door body and the second door body are driven to move toward the base frame, the first abutment portion abuts against the second abutment portion to drive the transmission part to rotate around the rotating shaft, thereby driving the sliding member and the second door body to move synchronously.

[0016] In an optional embodiment, the first door body includes a push plate and a door panel. The push plate is movably disposed on the base frame, and the door panel is fixedly disposed on the push plate. Both the push plate and the door panel are provided with corresponding first through holes. The second door body is movably disposed on the side of the door panel away from the push plate.

[0017] In an optional embodiment, the base frame is provided with a guide shaft, and the push plate, the door panel, and the second door body can all be axially movably disposed on the guide shaft;

[0018] A second reset member is provided on the guide shaft. The second reset member is connected to the push plate or the second door body. The second reset member is used to drive the push plate to move in the opposite direction to reset after the driving force acting on the push plate is removed.

[0019] In an optional embodiment, a mounting groove is provided on the side of the first door body away from the door panel, and the transmission component, the sliding component, and the first reset component are all disposed in the mounting groove.

[0020] In an optional embodiment, the safety door assembly further includes a protective cover that is detachably disposed in the mounting slot.

[0021] In an optional embodiment, the security door assembly further includes a partition connected to the first door body to divide the first door body into multiple isolation zones, each of the isolation zones being provided with at least one of the first through holes.

[0022] The beneficial effects of the circuit breaker provided in this embodiment of the invention include:

[0023] When an external driving force is applied to the transmission component, such as when the circuit breaker body is pushed forward and the transmission component is triggered to rotate or translate, this force is transmitted to the sliding component through the transmission mechanism. This causes the sliding component to move, displacing the second door relative to the first door. Ultimately, the originally misaligned first and second through holes are aligned, opening the passage for the insertion knife. When the external driving force is removed, such as when the circuit breaker is withdrawn, the elastic energy of the first reset component causes the sliding component to move in the opposite direction, thus returning the second door to its initial position. This re-misaligns the first and second through holes, completing the automatic closing action of the safety door. Therefore, the circuit breaker has a simple structure, reliable transmission, and is easy to assemble. It can achieve precise control of the opening and closing action of the second door, improving the reliability of the circuit breaker. Attached Figure Description

[0024] To more clearly illustrate the technical solutions of the embodiments of the present invention, 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 the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of a circuit breaker structure provided in an embodiment of the present invention;

[0026] Figure 2 An exploded view of a circuit breaker provided in an embodiment of the present invention;

[0027] Figure 3 This is a schematic diagram of the pusher plate structure provided in an embodiment of the present invention;

[0028] Figure 4 This is a schematic diagram of the door panel structure provided in an embodiment of the present invention;

[0029] Figure 5 This is a schematic diagram of the second door structure provided in an embodiment of the present invention;

[0030] Figure 6This is a schematic diagram of the transmission component structure provided in an embodiment of the present invention;

[0031] Figure 7 This is a cross-sectional schematic diagram of the transmission component provided in an embodiment of the present invention.

[0032] Icons: 10-Circuit breaker; 100-Base frame; 110-Second abutment part; 120-Guide shaft; 130-Second reset part; 200-Safety door assembly; 210-First door body; 211-First through hole; 212-First connecting hole; 213-Allowing hole; 214-Push plate; 215-Door panel; 216-Mounting groove; 220-Second door body; 221-Second through hole; 222-Second connecting hole; 223-Second connecting part; 230-Connecting piece; 250-Partition plate; 300-Transmission assembly; 310-Transmission piece; 311-First abutment part; 312-Transmission part; 313-Rotating shaft; 320-Sliding piece; 321-Connecting rod; 322-First connecting part; 323-Sliding part; 330-First reset part; 11-Circuit breaker body. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0034] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0035] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0036] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this invention is in use. They are only for the convenience of describing this invention 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 invention. In addition, the terms "first," "second," "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0037] Furthermore, terms such as "horizontal" and "vertical" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0038] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0039] Drawer-type circuit breakers are widely used in various power distribution systems because they allow for maintenance or replacement without interrupting the main circuit power supply. To ensure operator safety, these circuit breakers are typically equipped with a safety door mechanism: when the circuit breaker moves from the connected position to the test position, the safety door should automatically close, shielding the energized external busbars on the base frame; when the circuit breaker moves from the test position to the connected position, the safety door should open simultaneously to allow the insert to be smoothly inserted and reliably connected to the bridge contact.

[0040] However, existing security door mechanisms are complex in structure and have a large number of parts, which leads to complicated assembly, high manufacturing costs, and problems such as jamming and failure after long-term operation, affecting safety and reliability.

[0041] Therefore, there is an urgent need for a new type of safety door opening and closing structure that is simple in structure, reliable in coordinated action, convenient in assembly, and can operate stably for a long time.

[0042] Please see Figures 1 to 7This invention provides a circuit breaker 10, including a base frame 100, a safety door assembly 200, and a transmission assembly 300. The base frame 100 serves as the fundamental support component of the entire structure, used to fix and support other functional components. The safety door assembly 200 is mounted on the base frame 100, and the transmission assembly 300 is mounted on the safety door assembly 200, playing a crucial role in linkage control.

[0043] In detail, the safety door assembly 200 includes an overlapping first door body 210 and a second door body 220. The first door body 210 is movably disposed on the base frame 100, and the second door body 220 is movably disposed on the first door body 210. The first door body 210 is provided with a first through hole 211, and the second door body 220 is provided with a second through hole 221. Under normal conditions, these two through holes can be misaligned to shield the energized static contact area below, thereby improving safety. When it is necessary to allow the circuit breaker body 11 to be inserted and conduct the circuit, the first through hole 211 and the second through hole 221 need to be aligned and connected by a transmission action to form a channel through which the insert knife can pass.

[0044] The transmission assembly 300 includes a transmission member 310, a sliding member 320, and a first reset member 330. The transmission member 310 is disposed on the first door body 210, and its other end is in transmission cooperation with the sliding member 320. The sliding member 320 is movably disposed on the first door body 210. The first reset member 330 is connected to the sliding member 320, and the sliding member 320 is connected to the second door body 220. The movement of the sliding member 320 will directly cause the second door body 220 to displace relative to the first door body 210. The first reset member 330 is connected to the sliding member 320 and can be, but is not limited to, an elastic element such as a tension spring or a compression spring, used to provide a restoring force after the driving force is removed.

[0045] The transmission member 310 is used to drive the sliding member 320 to move, thereby causing the second door body 220 to move relative to the first door body 210, so that the first through hole 211 and the second through hole 221 correspond. The first reset member 330 is used to drive the sliding member 320 to move in the opposite direction after the driving force acting on the transmission member 310 is removed, so that the first through hole 211 and the second through hole 221 are misaligned.

[0046] In practical applications, when an external driving force acts on the transmission component 310, such as when the circuit breaker body 11 is pushed forward, triggering the transmission component 310 to rotate or translate, this force is transmitted to the sliding component 320 through a transmission connection, thereby causing the sliding component 320 to move in a set direction. Since the sliding component 320 is connected to the second door body 220, the second door body 220 is displaced relative to the first door body 210, ultimately aligning the originally misaligned first through hole 211 and second through hole 221, opening the passage for the insertion knife to enter. After the external driving force is removed, such as when the circuit breaker 10 is pulled out, the elastic energy of the first reset component 330 will cause the sliding component 320 to move in the opposite direction, thereby causing the second door body 220 to return to its initial position, causing the first through hole 211 and second through hole 221 to re-misalign, completing the automatic closing action of the safety door.

[0047] Therefore, this embodiment of the invention provides a circuit breaker 10, which achieves precise control of the opening and closing of the second door 220 by constructing a transmission assembly 300 on the first door 210, which includes a transmission component 310, a sliding component 320 and a first reset component 330. This not only makes the opening and closing of the safety door not dependent on a complex multi-link system, but also completes it through a simple mechanical transmission chain, improving the reliability of the operation and simplifying the assembly process.

[0048] It is understood that in other embodiments of the present invention, the circuit breaker body 11 may also drive the transmission component 310 to move directly during the advancement process, so as to synchronously drive the second door body 220 to move relative to the first door body 210, thereby realizing the opening and closing action of the safety door.

[0049] In detail, the security door assembly 200 also includes a connector 230, which is an independently set fastening or transmission element, and can be in the form of a pin, screw, rivet or guide rod, etc., used to establish a physical connection between the first door body 210 and the second door body 220.

[0050] The first door body 210 is provided with a first connecting hole 212, and the second door body 220 is provided with a second connecting hole 222. The connector 230 passes through the first connecting hole 212 and the second connecting hole 222. The second connecting hole 222 has an oblong hole structure. The second door body 220 can move along the extension direction of the second connecting hole 222 under the drive of the transmission component 300 so that the first through hole 211 and the second through hole 221 correspond.

[0051] Therefore, driven by the transmission component 300, the second door 220 can only move in the direction defined by the second connecting hole 222, avoiding unexpected actions such as rotation, tilting or swaying, and ensuring the stability and controllability of the movement trajectory.

[0052] Furthermore, the transmission member 310 is provided with a first abutment part 311, a transmission part 312, and a rotating shaft 313. The first abutment part 311 and the transmission part 312 are respectively located on both sides of the rotating shaft 313. The transmission part 312 is in transmission cooperation with the sliding member 320. The transmission member 310 is rotatably disposed on the first door body 210 through the rotating shaft 313, that is, the rotating shaft 313 serves as the rotation center of the transmission member 310. By being disposed on the first door body 210, the transmission member 310 can rotate relative to the first door body 210 with the rotating shaft 313 as the fulcrum.

[0053] The first abutment part 311 is used to drive the transmission part 312 to rotate around the rotating shaft 313, thereby driving the sliding member 320 and the second door 220 to move synchronously. For example, during the process of pushing in the circuit breaker body 11, the circuit breaker body 11 first pushes the first door 210 to push the first door 210 and the second door 220 to move towards the base frame 100. During this process, the first abutment part 311 contacts the base frame 100. Under the action of this contact force, the transmission part 310 rotates around the rotating shaft 313. Finally, the transmission part 312 drives the sliding member 320 to move, and the sliding member 320 drives the second door 220 to move synchronously relative to the first door 210, thereby realizing the correspondence between the first through hole 211 and the second through hole 221.

[0054] It should be noted that the first contact part 311 mentioned here refers to the part that can physically contact other structures and receive forces. Its shape can be a boss, inclined surface, roller, or plane, as long as it can introduce force. The transmission part 312 refers to the part used to transmit rotational motion to the sliding member 320. It can be a pin, drive arm, or slide, as long as it can form an effective mechanical linkage with the sliding member 320. The rotating shaft 313, as a support and positioning element, ensures that the transmission member 310 can stably complete the rotational motion when subjected to force, avoiding shaking or jamming.

[0055] Furthermore, the sliding member 320 is provided with a connecting rod 321, and the first door body 210 is provided with a clearance hole 213. The connecting rod 321 passes through the clearance hole 213 and connects with the second door body 220. The clearance hole 213 has an oblong hole structure. The second door body 220 can move along the extension direction of the second connecting hole 222 or the clearance hole 213 under the drive of the connecting rod 321, so that the first through hole 211 and the second through hole 221 correspond.

[0056] When the transmission component 310 is driven to rotate, it drives the transmission part 312 to push the sliding component 320 to undergo linear displacement. Since the connecting rod 321 is fixed to the sliding component 320 and passes through the clearance hole 213 on the first door body 210, the movement of the sliding component 320 will directly drive the connecting rod 321 to move synchronously. The other end of the connecting rod 321 is connected to the second door body 220, thereby causing the second door body 220 to move relative to the first door body 210.

[0057] It is worth mentioning that the clearance hole 213 is an oblong hole structure, that is, its outline extends along the sliding direction of the slider 320. Its structure provides the necessary space for relative movement between the connecting rod 321 and the first door 210, so that the second door 220 can slide smoothly along the extension direction of the clearance hole 213, avoiding jamming or stress concentration caused by rigid connection.

[0058] Specifically, the end of the connecting rod 321 is provided with a first connecting part 322, and the second door body 220 is provided with a second connecting part 223. The second connecting part 223 is a hole or groove structure, and the first connecting part 322 and the second connecting part 223 are fixedly engaged.

[0059] The first connecting part 322 refers to the structural feature located at the end of the connecting rod 321 for establishing a mechanical connection with other components. It can be a protrusion, hook, threaded section, stepped surface, or ball head, etc., with a limiting function. A corresponding second connecting part 223 is provided on the second door body 220. This second connecting part 223 is a hole or groove structure, such as a round hole, oblong hole, U-shaped groove, or snap-fit ​​groove, which can accommodate or engage the first connecting part 322, thereby forming a stable connection. The first connecting part 322 and the second connecting part 223 are fixedly engaged, allowing the movement of the connecting rod 321 to be directly and reliably transmitted to the second door body 220, driving it to produce synchronous displacement.

[0060] In addition, the slider 320 is provided with a sliding part 323 in the form of a hole or a groove, and the end of the transmission part 312 slides in cooperation with the sliding part 323.

[0061] The sliding part 323 refers to an open or closed geometric cavity structure formed on the body of the sliding member 320. It can be a round hole, an oblong hole, a U-shaped groove, a T-shaped groove, or other recessed shapes with guiding function. The end of the transmission part 312 forms a sliding fit with the sliding part 323, which means that the end of the transmission part 312 can be movably inserted into or embedded in the sliding part 323, thereby converting the oscillation of the transmission member 310 into the linear motion of the sliding member 320.

[0062] It is worth mentioning that the base frame 100 is provided with a second abutment part 110. When the first door body 210 and the second door body 220 are driven to move toward the base frame 100, the first abutment part 311 abuts with the second abutment part 110 to drive the transmission part 312 to rotate around the rotating shaft 313, so as to drive the sliding member 320 and the second door body 220 to move synchronously.

[0063] Therefore, by setting a second abutment part 110 on the base frame 100 as the action point of the first abutment part 311, during the process of pushing the circuit breaker body 11, the circuit breaker body 11 pushes the first door body 210 and the second door body 220 to move together towards the base frame 100, thereby causing the first abutment part 311 to abut against the second abutment part 110, thereby triggering the action of the transmission component 310. Thus, the automatic opening action is achieved by utilizing the relative displacement relationship between the safety door body and the base frame 100, without the need for additional drive components.

[0064] It can be understood that the second contact part 110 refers to a structural component that protrudes outward from the base frame 100 body. It can be in the form of a side plate, boss or block, etc., and is used to contact other components and transmit force during a specific movement phase.

[0065] For example, in this embodiment, the second abutment portion 110 is a side plate structure, and multiple side plate structures together form an installation space for accommodating the safety door assembly 200. The first door body 210 and the second door body 220 are movably disposed within the installation space, that is, the entire safety door assembly 200 is constrained to move in an orderly manner within the area defined by the side plate boundaries.

[0066] It should also be noted that in some embodiments of the present invention, the first door body 210 is an independent structural component, while in other embodiments, in order to improve the structural stability of the first door body 210, it may include a push plate 214 and a door panel 215. The push plate 214 is movably disposed on the base frame 100, and the door panel 215 is fixedly disposed on the push plate 214. Both the push plate 214 and the door panel 215 are provided with corresponding first through holes 211, clearance holes 213 and first connecting holes 212. These through holes are aligned with each other in the assembled state to form a channel penetrating the first door body 210, which allows the insert knife to pass through in the open state.

[0067] The second door body 220 is movably disposed on the side of the door panel 215 away from the push plate 214, that is, on the side of the door panel 215 facing the base frame 100. The second door body 220 can be laterally or laterally displaced relative to the door panel 215 under the drive of the transmission assembly 300. Since the first through hole 211 and the second through hole 221 are initially staggered to shield the live area, when it is necessary to connect the circuit breaker body 11, the sliding member 320 must first be moved by the transmission member 310, thereby driving the second door body 220 to move, so that the second through hole 221 gradually aligns with the first through hole 211, completing the opening action of the safety door.

[0068] It is understandable that after the transmission component 310 drives the sliding component 320 and the second door body 220 to move so that the first through hole 211 and the second through hole 221 correspond, the push plate 214 can also be driven to move in a direction away from the base frame 100.

[0069] Specifically, the base frame 100 is provided with a guide shaft 120. The push plate 214, the door panel 215, and the second door body 220 can all be axially movably arranged on the guide shaft 120. A second reset member 130 is provided on the guide shaft 120. The second reset member 130 is connected to the push plate 214 or the second door body 220. The second reset member 130 is used to drive the push plate 214 to move in the opposite direction to reset after the driving force acting on the push plate 214 is removed.

[0070] When the circuit breaker body 11 is pushed in, the transmission assembly 300 is first triggered to complete the lateral opening action of the second door 220. Subsequently, the external thrust acts on the push plate 214, pushing the push plate 214 to move into the distribution cabinet along the guide shaft 120. Since the door plate 215 is fixedly connected to the push plate 214, the door plate 215 moves forward synchronously with the push plate 214. Although the second door 220 can move laterally relative to the door plate 215, its whole body is also slidably fitted on the guide shaft 120. Therefore, when it is not laterally driven, it can still move axially together with the first door 210, thereby making room for the insert knife.

[0071] When the circuit breaker body 11 is pulled out, the elastic energy stored in the second reset member 130 is released, thereby causing the push plate 214 to move in the opposite direction along the guide shaft 120, that is, to retract to the initial position away from the insert blade. At this time, the door panel 215 resets together with the push plate 214, completing the overall retraction of the first door body 210.

[0072] After the first door body 210 retracts to the position where the first abutment part 311 and the second abutment part 110 are separated, the elastic energy of the first reset member 330 will drive the sliding member 320 to move in the opposite direction, thereby driving the second door body 220 back to the initial position, so that the first through hole 211 and the second through hole 221 are re-misaligned, and the automatic closing action of the safety door is completed.

[0073] It should also be noted that the first door body 210 has a mounting groove 216 on the side away from the door panel 215, and the transmission component 310, the sliding component 320 and the first reset component 330 are all located in the mounting groove 216.

[0074] The mounting groove 216 is a receiving space formed by a recessed or protruding structure from the surface of the push plate 214. Its shape can be adapted to the contour of the internal parts and can be a rectangular cavity, a U-shaped groove or a multi-faceted enclosed structure. It is used to embed and fix the transmission member 310, the sliding member 320 and the first reset member 330.

[0075] It is understood that when the first door body 210 includes a door panel 215 and a push plate 214, the mounting groove 216 is provided on the push plate 214.

[0076] Furthermore, the safety door assembly 200 also includes a protective cover, which is detachably mounted in the mounting groove 216 to form a relatively enclosed enclosure with the mounting groove 216. This enclosure contains the transmission component 310, the sliding component 320, and the first reset component 330, preventing operators from accidentally contacting moving parts during routine maintenance and also preventing foreign objects from entering and causing the mechanism to jam or wear. During equipment debugging, troubleshooting, or spring replacement, the protective cover can be removed using simple tools or by hand, exposing the complete transmission assembly 300 for visual inspection, lubrication, or parts replacement.

[0077] Furthermore, the security door assembly 200 also includes a partition 250, which is connected to the first door body 210 to divide the first door body 210 into multiple isolation areas, each isolation area being provided with at least one first through hole 211.

[0078] It is understood that the partition 250 is an independently installed insulating or metal partition component, typically in the form of a plate, rib, or multi-segment structure, and is installed on the first door 210 through a fixed connection method (such as screw connection, snap-fit, welding, or integral molding). After the partition 250 is connected to the first door 210, it divides the originally continuous surface of the first door 210 into multiple independent isolation areas. These areas are physically blocked by the partition 250 and are not directly connected to each other, thus forming their own closed protective units, thereby improving the electrical isolation capability of the circuit breaker 10.

[0079] In summary, this invention provides a circuit breaker 10 that precisely completes the opening action of the safety door assembly through the transmission cooperation of the transmission member 310 and the sliding member 320. The circuit breaker body 11 pushes the entire safety door assembly 200 forward, thereby decomposing "opening" and "pushing" into two independent steps, avoiding interference between the two actions, and ensuring the smoothness and reliability of the opening and closing action of the safety door assembly 200. In addition, during the opening process, only the circuit breaker body 11 needs to apply a rotational torque to the transmission member 310, without overcoming other frictional forces, which greatly reduces the operating resistance and makes the operation more convenient. Finally, the transmission assembly 300, composed of the transmission member 310, the sliding member 320 and the first reset member 330, can easily realize complex opening and closing actions through the linkage function. The first reset member 330 ensures that the safety door assembly 200 can be closed quickly and reliably, and the second reset member 130 ensures that the safety door assembly 200 can be quickly and completely reset after the circuit breaker body 11 is withdrawn. That is, through double reset guarantee, the operational safety and stability are effectively improved.

[0080] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A circuit breaker, characterized in that, include: Base frame (100); Safety door assembly (200) includes an overlapping first door body (210) and a second door body (220), the first door body (210) being movably disposed on the base frame (100), the second door body (220) being movably disposed on the first door body (210), the first door body (210) being provided with a first through hole (211), and the second door body (220) being provided with a second through hole (221); A transmission assembly (300) includes a transmission member (310), a sliding member (320), and a first reset member (330). The transmission member (310) is disposed on the first door body (210), and its other end is in transmission cooperation with the sliding member (320). The sliding member (320) is movably disposed on the first door body (210). The first reset member (330) is connected to the sliding member (320), and the sliding member (320) is connected to the second door body (220). The transmission member (310) is driven to move the sliding member (320) to displace the second door body (220) relative to the first door body (210) so that the first through hole (211) and the second through hole (221) correspond. The first reset member (330) is used to drive the sliding member (320) to move in the opposite direction after the driving force acting on the transmission member (310) is removed so that the first through hole (211) and the second through hole (221) are misaligned. The transmission component (310) is provided with a first abutment part (311), a transmission part (312), and a rotating shaft (313). The first abutment part (311) and the transmission part (312) are respectively located on both sides of the rotating shaft (313). The transmission part (312) is in transmission cooperation with the sliding component (320). The transmission component (310) is rotatably disposed on the first door body (210) through the rotating shaft (313). The first abutment part (311) is used to drive the transmission part (312) to rotate around the rotating shaft (313) when abutted, so as to drive the sliding component (320) and the second door body (220) to move synchronously. The sliding member (320) is provided with a connecting rod (321), and the first door body (210) is provided with a clearance hole (213). The connecting rod (321) passes through the clearance hole (213) and connects with the second door body (220). The clearance hole (213) is an oblong hole structure. The second door body (220) can move along the extension direction of the clearance hole (213) under the drive of the connecting rod (321) so that the first through hole (211) and the second through hole (221) correspond.

2. The circuit breaker according to claim 1, characterized in that, The end of the connecting rod (321) is provided with a first connecting part (322), and the second door body (220) is provided with a second connecting part (223). The second connecting part (223) is a hole or groove structure, and the first connecting part (322) and the second connecting part (223) are fixedly engaged.

3. The circuit breaker according to claim 1, characterized in that, The sliding member (320) is provided with a sliding part (323) in the shape of a hole or a groove, and the end of the transmission part (312) slides in cooperation with the sliding part (323).

4. The circuit breaker according to claim 1, characterized in that, The base frame (100) is provided with a second abutment part (110). When the first door body (210) and the second door body (220) are driven to move toward the base frame (100), the first abutment part (311) abuts against the second abutment part (110) to drive the transmission part (312) to rotate around the rotating shaft (313) to drive the sliding member (320) and the second door body (220) to move synchronously.

5. The circuit breaker according to claim 1, characterized in that, The first door body (210) includes a push plate (214) and a door panel (215). The push plate (214) is movably disposed on the base frame (100), and the door panel (215) is fixedly disposed on the push plate (214). Both the push plate (214) and the door panel (215) are provided with corresponding first through holes (211). The second door body (220) is movably disposed on the side of the door panel (215) away from the push plate (214).

6. The circuit breaker according to claim 5, characterized in that, The base frame (100) is provided with a guide shaft (120), and the push plate (214), the door panel (215) and the second door body (220) can all be axially movably arranged on the guide shaft (120). A second reset member (130) is provided on the guide shaft (120). The second reset member (130) is connected to the push plate (214) or the second door body (220). The second reset member (130) is used to drive the push plate (214) to move in the opposite direction to reset after the driving force acting on the push plate (214) is removed.

7. The circuit breaker according to claim 1 or 5, characterized in that, The first door body (210) is provided with a mounting groove (216) on the side away from the second door body (220), and the transmission component (310), the sliding component (320) and the first reset component (330) are all provided in the mounting groove (216).

8. The circuit breaker according to claim 7, characterized in that, The safety door assembly (200) also includes a protective cover, which is detachably disposed in the mounting slot (216).

9. The circuit breaker according to claim 1, characterized in that, The security door assembly (200) further includes a partition (250) connected to the first door body (210) to divide the first door body (210) into multiple isolation areas, each of the isolation areas being provided with at least one first through hole (211).

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