A circuit breaker with a fast tripping structure

Abstract

The application relates to the technical field of circuit breakers, in particular to a circuit breaker with a quick tripping structure, which comprises a circuit breaker shell, a working mechanism, a conversion mechanism, a reset driving mechanism, a first static contact and a second static contact, the working mechanism is installed in the circuit breaker shell, the conversion mechanism is installed on the working mechanism, the conversion mechanism can contact the first static contact and the second static contact through rotation, the first static contact is installed in the circuit breaker shell and is connected with the conversion mechanism, and the reset driving mechanism resets the conversion mechanism; the first static contact and the second static contact realize the functions of one-time protection and two-time detection of the circuit, one-time protection refers to when the circuit is overloaded, the first moving contact is separated from the first static contact through a tripping mechanism to realize circuit disconnection, at the same time of disconnection, the first conversion rod rotates around the central axis of the bearing seat table, so that the second moving contact contacts the second static contact, and in the two-time detection, part of the electrical appliances will work again to detect the circuit state.

Description

Technical Field

[0001] This invention relates to the field of circuit breaker technology, and more specifically to a circuit breaker with a fast tripping structure. Background Technology

[0002] A circuit breaker is a switching device capable of closing, carrying, and interrupting current under normal circuit conditions and closing, carrying, and interrupting current under abnormal circuit conditions within a specified time. Circuit breakers are classified into high-voltage circuit breakers and low-voltage circuit breakers according to their application range. The boundary between high and low voltage is somewhat blurred; generally, those above 3kV are considered high-voltage electrical appliances. Circuit breakers are also classified by the number of poles: single-pole, two-pole, three-pole, and four-pole, etc.; and by installation method: plug-in type, fixed type, and drawer type, etc. In modern social production activities, circuit breakers consist of a contact system, an arc-extinguishing system, an operating mechanism, a tripping mechanism, and a casing. Among these, the tripping mechanism is a crucial guarantee for ensuring safe production and daily life, and a preventative measure to avoid fires and other hazards.

[0003] The tripping mechanism is a crucial component of the operating system that enables automatic circuit breaker tripping. During the closing process and when the circuit breaker is in the closed position, the tripping mechanism acts like a fulcrum. When the circuit breaker trips automatically, the tripping mechanism, operated by the tripping device, releases this fulcrum, allowing the circuit breaker to enter a free-opening state. Simply put, the lever and spring mechanism in the switch is held in place by the tripping device. Once the tripping device actuates, the lever and spring mechanism in the switch will freely reset, meaning the switch trips. The tripping device here is analogous to the pin on a mousetrap.

[0004] Currently, the tripping structure adopts an electromagnetic circuit breaker tripping mechanism, employing a technical solution combining electromagnetic force drive and mechanical linkage. This mechanism achieves graded tripping function through a dual-locking coordination system, completing synchronous action during electromagnetic tripping and implementing delayed graded protection during thermal tripping. Its structure includes a tripping core, an impact core sliding sleeve assembly, and a linkage shaft limit system. Combined with an arc suppression design, it effectively balances contact burn-out and provides multiple protection capabilities against leakage current, short circuit, and overcurrent.

[0005] Patent application number 202110866355.9 discloses a miniature circuit breaker with fast tripping, comprising a housing, an upper wiring hole on the upper end face of the housing with an upper connector below the upper wiring hole, a lower wiring hole on the lower end face of the housing with a lower connector above the lower wiring hole, a switching control mechanism located inside the front side of the housing, a short-circuit tripping mechanism located in the middle of the housing, an arc baffle fixedly connected to the rear side of the housing, and a metal guide plate mechanism located at the lower side of the housing. The above patent has the following drawback: the tripping structure in the circuit breaker cannot automatically reset after operation, requiring manual reset by the operator, which is cumbersome.

[0006] Patent document with application number 202021794811.0 discloses a circuit breaker with a tripping structure, including a housing, a stationary contact at the top of the inner side of the housing, a U-shaped iron core at the bottom of the inner side, a U-shaped connecting block on the rear cantilever of the U-shaped iron core, a V-shaped connecting rod rotatably connected to the U-shaped connecting block, a moving contact connected to the front side of the V-shaped connecting rod, a compression spring connected to the rear side, and a coil sleeved on the outer side of the front cantilever of the U-shaped iron core. In normal operation, the circuit breaker with a tripping structure uses a compression spring to pull up the V-shaped connecting rod, causing the moving contact to contact the stationary contact and ensuring circuit continuity. When the circuit is overloaded, the large current flowing through the coil enhances the magnetism, pulling the moving contact downwards and separating it from the stationary contact, thus cutting off the circuit. At this point, the coil magnetism disappears, and the moving contact springs back up under the pressure of the compression spring, reconnecting the circuit. However, the aforementioned patent has the following drawback: if the tripping structure in the circuit breaker trips and resets due to excessive operating current, and the operating current remains too high, the tripping structure will repeatedly trip and reset, causing the circuit to repeatedly open and close, potentially damaging electrical appliances.

[0007] The purpose of this invention is to solve the problems mentioned above. Summary of the Invention

[0008] In view of the above-mentioned shortcomings of the existing technology, the present invention provides a circuit breaker with a fast tripping structure, which can effectively solve the existing problems.

[0009] To achieve the above objectives, the present invention provides the following technical solution: This invention provides a circuit breaker with a fast tripping structure, including a circuit breaker housing, a working mechanism, a switching mechanism, a reset drive mechanism, a first stationary contact, and a second stationary contact. The working mechanism is installed inside the circuit breaker housing, and the switching mechanism is installed on the working mechanism. The switching mechanism can rotate to contact the first and second stationary contacts. The first stationary contact is fixed inside the circuit breaker housing and can contact it when the switching mechanism rotates. The reset drive mechanism is used to reset the switching mechanism. When an excessive current causes circuit overload, the switching mechanism can stably stop at three positions during rotation. The switching mechanism disengages from the first stationary contact and then contacts the second stationary contact, forming a secondary circuit. If the current in the secondary circuit still exceeds a preset threshold, the switching mechanism rotates to disengage from the second stationary contact and also remains disengaged from the first stationary contact. At this time, the switching mechanism will not re-contact the first stationary contact.

[0010] Furthermore, the working mechanism includes a working iron core fixed on the inner side of the bottom of the circuit breaker housing. The working iron core is U-shaped, and a working coil is arranged around one side of the vertical rod of the working iron core. A receiving base is fixedly connected to the top of one side of the vertical rod of the working iron core.

[0011] Furthermore, the conversion mechanism includes a conversion base rod rotatably connected to the rotating shaft of the receiving base. The conversion base rod is T-shaped. A first conversion rod is fixedly connected to one end of the conversion base rod. A first moving contact is fixedly connected to one end of the first conversion rod. A second conversion rod is fixedly connected to the top of the other end of the conversion base rod. A second moving contact is fixedly connected to one end of the second conversion rod.

[0012] Furthermore, both the first and second conversion levers are set at an angle.

[0013] Furthermore, an extension block is fixedly connected inside the circuit breaker housing, and a locking plate is provided inside the extension block, that is, the locking plate is slidably set inside the extension block; the end of the locking plate inside the circuit breaker housing is machined with an arc edge, and the end of the locking plate outside the circuit breaker housing is machined with a through hole.

[0014] Furthermore, when the first stationary contact and the first moving contact separate, the first moving contact will touch a part of the locking plate located inside the circuit breaker housing when it rotates, causing the locking plate to move towards the inside of the circuit breaker housing.

[0015] Furthermore, the reset drive mechanism includes a reset support base fixed inside the circuit breaker housing, a reset spring is provided inside the reset support base, a reset telescopic rod is fixedly connected to the top of the reset spring, the reset telescopic rod slides against the inner wall of the reset support base, and a transition ball is machined on the top of the reset telescopic rod.

[0016] Furthermore, a rotating base is fixedly connected to the bottom of the other side of the conversion base rod, and a turning link is rotatably connected to the bottom of the rotating base. The turning link is formed by two links hinged together, and the bottom of the turning link is connected to the conversion ball.

[0017] Furthermore, the trajectory of the first moving contact is a circular motion with the central axis of the receiving base rotating shaft as the center.

[0018] Furthermore, the trajectory of the second moving contact is a circular motion with the central axis of the receiving base rotating shaft as the center.

[0019] The technical solution provided by this invention has the following advantages compared with known public technologies: The circuit is protected by two stationary contacts, a first stationary contact and a second stationary contact, which provide primary protection and secondary testing. Primary protection means that when the circuit is overloaded, the tripping mechanism disconnects the first moving contact from the first stationary contact to break the circuit. At the same time, the first switching rod rotates around the central axis of the receiving base, causing the second moving contact to contact the second stationary contact. At this time, all electrical appliances are de-energized after the first disconnection. When the second moving contact contacts the second stationary contact, some electrical appliances restart to test whether the circuit is still overloaded. If it is not overloaded, the circuit continues to be connected with the second moving contact and the second stationary contact in contact. If it is overloaded, the second moving contact disconnects from the second stationary contact, but the first moving contact will not contact the first stationary contact at this time.

[0020] The compressed reset spring inside the reset drive mechanism provides driving force for the first moving contact to return to the first stationary contact. The rotating base, the turning link, and the transition ball ensure the connection between the reset drive mechanism and the conversion mechanism during the rotation of the conversion base rod, preventing the conversion mechanism and the reset drive mechanism from disengaging, which would prevent the whole device from working. The first moving contact moves in a circular motion centered on the central axis of the receiving base shaft, and the second moving contact moves in a circular motion centered on the central axis of the receiving base shaft. The circular motion of the first and second moving contacts ensures that they can make contact with the first and second stationary contacts, while avoiding collisions between the first and second moving contacts and the inner wall of the circuit breaker housing, which could cause damage. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are merely some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without any creative effort.

[0022] Figure 1 This is a schematic diagram of the overall structure of the circuit breaker with a fast tripping structure according to the present invention; Figure 2 This is a schematic diagram of the internal structure of the circuit breaker with a fast tripping structure according to the present invention; Figure 3 This is a schematic diagram of the circuit breaker with a fast tripping structure of the present invention switching from a first operating state to a second operating state; Figure 4 This is a schematic diagram of the working mechanism structure of the present invention with a quick-release structure; Figure 5 This is a schematic diagram of the conversion mechanism with a quick-release structure according to the present invention; Figure 6 This is a schematic diagram of the reset drive mechanism with a fast tripping structure according to the present invention.

[0023] Figure Labels

[0024] 100 - Circuit breaker housing; 101 - Start button; 102 - Extension block; 110 - Locking plate 200-Working mechanism; 201-Working iron core; 202-Working coil; 203-Receiving base; 300 - Conversion mechanism; 301 - Conversion base rod; 302 - Rotating base; 303 - Turning link; 304 - First conversion rod; 305 - First moving contact; 306 - Second conversion rod; 307 - Second moving contact; 400 - Reset drive mechanism; 401 - Reset support base; 402 - Reset spring; 403 - Reset telescopic rod; 404 - Adapter ball; 500 - First stationary contact; 600 - Second stationary contact. Detailed Implementation

[0025] Embodiments of this disclosure will now be described in more detail with reference to the accompanying drawings. While some embodiments of this disclosure are shown in the drawings, it should be understood that this disclosure can be implemented in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of this disclosure. It should be understood that the accompanying drawings and embodiments of this disclosure are for illustrative purposes only and are not intended to limit the scope of protection of this disclosure.

[0026] It should also be noted that, for ease of description, only the parts relevant to the invention are shown in the accompanying drawings. Unless otherwise specified, the embodiments and features described in this disclosure can be combined with each other.

[0027] It should be noted that the concepts of "first" and "second" mentioned in this disclosure are used only to distinguish different devices, modules or units, and are not used to limit the order of functions performed by these devices, modules or units or their interdependencies.

[0028] It should be noted that the terms "a" and "a plurality of" used in this disclosure are illustrative rather than restrictive, and those skilled in the art should understand that, unless otherwise expressly indicated in the context, they should be understood as "one or more".

[0029] This disclosure will now be described in detail with reference to the accompanying drawings and embodiments.

[0030] The present invention will be further described below with reference to embodiments.

[0031] Example:

[0032] Currently, in existing technologies, the tripping mechanism in circuit breakers can break the circuit when it is overloaded. More advanced circuit breakers automatically close after tripping, with the moving and stationary contacts re-engaging. However, automatically closing circuit breakers cannot determine whether the current in the current circuit is overloaded, leading to frequent repeated opening and closing of the circuit breaker, which can damage the circuit and electrical components. Therefore, it is necessary to limit the automatic closing of the circuit breaker after tripping to prevent repeated opening and closing due to subsequent current overload. Therefore, a circuit breaker with a fast-tripping structure is proposed, such as... Figure 1-6 As shown, The circuit breaker includes a circuit breaker housing 100, a working mechanism 200, a switching mechanism 300, a reset drive mechanism 400, a first stationary contact 500, and a second stationary contact 600. The working mechanism 200 is installed inside the circuit breaker housing 100, and the switching mechanism 300 is installed on the working mechanism 200. The switching mechanism 300 can rotate to contact the first stationary contact 500 and the second stationary contact 600. The first stationary contact 500 is installed inside the circuit breaker housing 100 and connected to the switching mechanism 300. The reset drive mechanism 400 is used to reset the switching mechanism 300. Specifically, initially, the switching mechanism 300 is in contact with the first stationary contact 500. The energized part of the circuit breaker is the first stationary contact 600. When the circuit is overloaded due to excessive current, the switching mechanism 300 can be stably stopped at three positions during rotation. The switching mechanism 300 disengages from the first stationary contact 500. At this time, the switching mechanism 300 rotates and contacts the second stationary contact 600 to form a new circuit. At this time, the energized part in the circuit breaker is the second stationary contact 600, which supplies power to the circuit. If the current in the secondary circuit still exceeds the preset threshold, the switching mechanism 300 rotates and disengages from the second stationary contact 600, and also remains disengaged from the first stationary contact 500. At this time, the switching mechanism 300 will not re-contact the first stationary contact 500, and the circuit is in an open state. The circuit needs to be manually connected to continue working.

[0033] Preferably, the first station is kept in contact by the push of the return spring 402; the second station is blocked from returning by the locking plate 110, while the return spring 402 presses the second moving contact 307 against the second stationary contact 600; the third station is blocked from returning by the locking plate 110, and the second moving contact 307 has disengaged and is supported in the middle position by the return spring 402.

[0034] A start button 101 is machined on one side of the outer wall of the circuit breaker housing 100 for manual closing. When pressed, it can reset the switching mechanism 300 to the first position.

[0035] Furthermore, the working mechanism 200 includes a working iron core 201 fixed to the inner bottom of the circuit breaker housing 100. The working iron core 201 is U-shaped, and a working coil 202 is arranged around one vertical rod on one side of the working iron core 201. A receiving base 203 is fixedly connected to the top of one vertical rod on one side of the working iron core 201. It should be noted that the working coil 202 is connected to the first stationary contact 500 and the second stationary contact 600 respectively via wires. The switching mechanism 300 includes a switching base rod 301 rotatably connected to the rotating shaft of the receiving base 203. The switching base rod 301 is T-shaped. A first switching rod 304 is fixedly connected to one end of the switching base rod 301, and a first moving contact 305 is fixedly connected to one end of the first switching rod 304. A second switching rod 306 is fixedly connected to the top of the other end of the switching base rod 301, and a second moving contact 307 is fixedly connected to one end of the second switching rod 306. Specifically, both the first switching rod 304 and the second switching rod 306 are inclined to facilitate their respective... The circuit is formed by contacting the first stationary contact 500 and the second stationary contact 600 respectively. The two stationary contacts, the first stationary contact 500 and the second stationary contact 600, provide primary protection and secondary testing for the circuit. Primary protection means that when the circuit is overloaded, the first moving contact 305 of the tripping mechanism disengages from the first stationary contact 500 to disconnect the circuit. At the same time as the circuit is disconnected, the first conversion rod 304 rotates around the central axis of the bearing base 203, which causes the second moving contact 307 to contact the second stationary contact 600. At this time, all electrical appliances are de-energized after the first disconnection. When the second moving contact 307 contacts the second stationary contact 600, some electrical appliances start working again to test whether the circuit is still overloaded. If it is not overloaded, the circuit continues to be connected with the second moving contact 307 and the second stationary contact 600 connected. If it is overloaded, the second moving contact 307 disengages from the second stationary contact 600, but at this time the first moving contact 305 will not contact the first stationary contact 500.

[0036] Preferably, when the current is overloaded, the working coil 202 generates a strong magnetic field, which attracts the first moving contact 305 or the switching base rod 301, causing it to rotate against the thrust of the return spring 402, thereby disengaging from the first stationary contact.

[0037] Furthermore, to ensure that the second moving contact 307 disengages from the second stationary contact 600, but the first moving contact 305 does not contact the first stationary contact 500 at this time, an extension block 102 is fixedly connected inside the circuit breaker housing 100. A locking plate 110 is provided inside the extension block 102, meaning the locking plate 110 is slidably disposed within the extension block 102. The locking plate 110 has an elastic latching function and an elastic reset function. The locking plate 110 is located within the circuit breaker housing. One end of the circuit breaker housing 100 is machined with an arc edge, and the end of the locking plate 110 located outside the circuit breaker housing 100 is machined with a through hole. Initially, the end of the locking plate 110 located outside the circuit breaker housing 100 extends a longer distance, while only a smaller portion is located inside the circuit breaker housing 100. When the first stationary contact 500 and the first moving contact 305 disengage, the first moving contact 305 will touch the locking plate 110 located inside the circuit breaker housing 100 during rotation. Part of the circuit breaker housing 100 is moved towards the inside of the circuit breaker housing 100, causing the portion of the circuit breaker housing 110 inside the housing 100 to be longer and the portion outside the housing 100 to be shorter. At this point, the portion of the circuit breaker housing 110 inside the housing 100 can prevent the first moving contact 305 from rotating back to the first stationary contact 500. This ensures that the first moving contact 305 will not contact the first stationary contact 500 after the second moving contact 307 is separated from the second stationary contact 600. In addition, if the circuit is still overloaded after the second test, the circuit is in an open state. To connect the circuit, the operator needs to pull the circuit breaker housing 100 from the outside of the housing 100, i.e., through the hole of the circuit breaker housing 110, to reset the circuit breaker housing 110. At this point, the first moving contact 305 can return to the first stationary contact 500 and contact it to form a circuit.

[0038] Preferably, the locking plate 110 has no elastic reset function. After being pushed, it can be held in a new position by friction or a latch, and requires manual pulling to reset. Furthermore, to ensure that after pulling the locking plate 110, the first moving contact 305 can return to the first stationary contact 500 to form a circuit, the reset drive mechanism 400 includes a reset support 401 fixed inside the circuit breaker housing 100. A reset spring 402 is installed inside the reset support 401, and a reset telescopic rod 403 is fixedly connected to the top of the reset spring 402. The reset telescopic rod 403 slides against the inner wall of the reset support 401, and a transition ball 404 is machined on the top of the reset telescopic rod 403. A rotating base 302 is fixedly connected to the bottom of the other side of the conversion base rod 301, and a turning link 303 is rotatably connected to the bottom of the rotating base 302. The turning link 303 consists of two... The linkage is hinged, and the bottom of the pivot linkage 303 is connected to the adapter ball 404. It is worth noting that the return spring 402 in the compressed state inside the reset drive mechanism 400 provides driving force for the first moving contact 305 to return to the first stationary contact 500. The rotating base 302, pivot linkage 303 and adapter ball 404 ensure the connection between the reset drive mechanism 400 and the conversion mechanism 300 during the rotation of the conversion base rod 301. That is, it ensures that the reset drive mechanism 400 and the conversion mechanism 300 are always connected during the rotation of the conversion base rod 301, preventing the conversion mechanism 300 and the reset drive mechanism 400 from disengaging, which would cause the whole device to fail to work.

[0039] For ease of understanding, the circuit formed by the contact of the first moving contact 305 and the first stationary contact 500 is called the first operating state, and the circuit formed by the contact of the second moving contact 307 and the second stationary contact 600 is called the second operating state. The separation of the first moving contact 305 from the first stationary contact 500 is called primary protection, and the contact between the second moving contact 307 and the second stationary contact 600 is called secondary probing. The trajectory of the first moving contact 305 is [missing information - likely related to the support base 2]. The 03 rotating shaft moves in a circular motion with the central axis as the center. The trajectory of the second moving contact 307 is a circular motion with the central axis of the rotating shaft of the receiving base 203 as the center. The circular motion of the first moving contact 305 and the second moving contact 307 ensures that the first moving contact 305 and the second moving contact 307 can make contact with the first stationary contact 500 and the second stationary contact 600, while avoiding the first moving contact 305 and the second moving contact 307 from colliding with the inner wall of the circuit breaker housing 100 and causing damage.

[0040] In this embodiment, when the operator turns on the start button 101, in the initial state, the first moving contact 305 and the first stationary contact 500 are in contact to form a circuit. The end of the locking plate 110 located outside the circuit breaker housing 100 extends a long distance, while the end located inside the circuit breaker housing 100 is only a small part. The second moving contact 307 is not in contact with the second stationary contact 600. This is the first working state.

[0041] When the current in the circuit is overloaded for the first time, the first moving contact 305 and the first stationary contact 500 separate to form a primary protection. The switching base rod 301 rotates, causing the first moving contact 305 and the second moving contact 307 to make a circular motion. When the first moving contact 305 rotates, it will touch a part of the locking plate 110 located inside the circuit breaker housing 100, thereby pushing the locking plate 110 and simultaneously moving the locking plate 110 towards the inside of the circuit breaker housing 100 until the part of the locking plate 110 inside the circuit breaker housing 100 is longer and the part of the locking plate 110 outside the circuit breaker housing 100 is shorter. At this time, the part of the locking plate 110 located inside the circuit breaker housing 100 can prevent the first moving contact 305 from rotating in the opposite direction and returning to the first stationary contact 500. The second moving contact 307 contacts the second stationary contact 600, which is to test whether the electrical appliances in the current circuit will cause a circuit overload when they are working. This is the second working state.

[0042] Specifically, when the first stationary contact 500 and the first moving contact 305 are not disengaged, the positioning plate 110 is in a positioning state, that is, in the initial position; when disengagement occurs, the first moving contact 305 will touch a part of the positioning plate 110 inside the circuit breaker housing 100 when it rotates, which will open the positioning plate 110 and drive the positioning plate 110 to move inward.

[0043] During the second test, if there is no overload, the circuit continues to be connected with the second moving contact 307 and the second stationary contact 600. If the current in the circuit is still large, the working mechanism will disengage the switching mechanism 300 from the second stationary contact 600. At this time, the locking plate 110 located inside the circuit breaker housing 100 can prevent the first moving contact 305 from rotating in the opposite direction to the position of the first stationary contact 500, ensuring that the first moving contact 305 will not contact the first stationary contact 500. When the circuit is in the open state, it needs to be manually connected to continue working. The operator needs to pull the locking plate 110 outward from the outside of the circuit breaker housing 100 to reset the locking plate 110. At this time, the first moving contact 305 can return to the first stationary contact 500 and contact it to form a circuit.

[0044] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention 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 will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. A circuit breaker with a fast tripping structure, characterized in that, The circuit breaker includes a circuit breaker housing (100), a working mechanism (200), a switching mechanism (300), a reset drive mechanism (400), a first stationary contact (500), and a second stationary contact (600). The working mechanism (200) is installed inside the circuit breaker housing (100), and the switching mechanism (300) is installed on the working mechanism (200). The switching mechanism (300) can rotate to contact the first stationary contact (500) and the second stationary contact (600). The first stationary contact (500) is installed inside the circuit breaker housing (100) and connected to the switching mechanism (300). The reset drive mechanism (400) is used to reset the switching mechanism (300). When the current is too large and the circuit is overloaded, the switching mechanism can be stably stopped at three positions when it rotates. The switching mechanism (300) is separated from the first stationary contact (500), and the switching mechanism (300) rotates to contact the second stationary contact (600) to form a secondary circuit. If the current in the secondary circuit still exceeds the preset threshold, the switching mechanism (300) rotates to separate from the second stationary contact (600) and also remains separated from the first stationary contact (500). At this time, the switching mechanism (300) will not re-contact the first stationary contact (500).

2. A circuit breaker with a fast tripping structure according to claim 1, characterized in that, The working mechanism (200) includes a working iron core (201) fixed on the bottom inner side of the circuit breaker housing (100). The working iron core (201) is U-shaped. A working coil (202) is provided around one side of the vertical rod of the working iron core (201). A receiving platform (203) is fixedly connected to the top of one side of the vertical rod of the working iron core (201).

3. A circuit breaker with a fast tripping structure according to claim 2, characterized in that, The conversion mechanism (300) includes a conversion base rod (301) rotatably connected to the shaft of the receiving base (203). The conversion base rod (301) is T-shaped. A first conversion rod (304) is fixedly connected to one end of the conversion base rod (301). A first moving contact (305) is fixedly connected to one end of the first conversion rod (304). A second conversion rod (306) is fixedly connected to the top of the other end of the conversion base rod (301). A second moving contact (307) is fixedly connected to one end of the second conversion rod (306).

4. A circuit breaker with a fast tripping structure according to claim 3, characterized in that, Both the first conversion lever (304) and the second conversion lever (306) are inclined.

5. A circuit breaker with a fast tripping structure according to claim 4, characterized in that, An extension block (102) is fixedly connected inside the circuit breaker housing (100), and a locking plate (110) is provided inside the extension block (102). The end of the positioning plate (110) located inside the circuit breaker housing (100) is machined with an arc edge, and the end of the positioning plate (110) located outside the circuit breaker housing (100) is machined with a through hole.

6. A circuit breaker with a fast tripping structure according to claim 5, characterized in that, When the first stationary contact (500) and the first moving contact (305) separate, the first moving contact (305) will touch a part of the locking plate (110) inside the circuit breaker housing (100) when it rotates, causing the locking plate (110) to move into the circuit breaker housing (100).

7. A circuit breaker with a fast tripping structure according to claim 6, characterized in that, The reset drive mechanism (400) includes a reset support (401) fixed inside the circuit breaker housing (100), a reset spring (402) is provided inside the reset support (401), a reset telescopic rod (403) is fixedly connected to the top of the reset spring (402), the reset telescopic rod (403) slides against the inner wall of the reset support (401), and a transfer ball (404) is machined on the top of the reset telescopic rod (403).

8. A circuit breaker with a fast tripping structure according to claim 7, characterized in that, A rotating base (302) is fixedly connected to the bottom of the other side of the conversion base rod (301). A turning link (303) is rotatably connected to the bottom of the rotating base (302). The turning link (303) is formed by two connecting rods hinged together. The bottom of the turning link (303) is connected to the transition ball (404).

9. A circuit breaker with a fast tripping structure according to claim 8, characterized in that, The trajectory of the first moving contact (305) is a circular motion with the central axis of the rotating shaft of the receiving base (203) as the center.

10. A circuit breaker with a fast tripping structure according to claim 9, characterized in that, The trajectory of the second moving contact (307) is a circular motion with the central axis of the rotating shaft of the receiving seat (203) as the center.

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