A trip structure and circuit breaker

Abstract

The application discloses a tripping structure and a circuit breaker. The tripping structure is applied to the circuit breaker and is used for driving the circuit breaker to trip. The tripping structure comprises a traction piece and a tripping assembly. The tripping assembly comprises an electromagnet, a permanent magnet, a spring and an action rod. The electromagnet comprises a magnetic core and a coil. The tripping structure is simple in structure. The action rod drives the traction piece to move, and the tripping function of the circuit breaker is realized. On one hand, the coil is repelled to a second position by the permanent magnet in the conductive state, and then the magnetic core drives the action rod to move, so that the traction piece is actuated. On the other hand, the spring is arranged. The elastic force of the spring can drive the magnetic core to move from a first position to the second position, so that the spring can assist in actuating. The actuating strength on the traction piece is improved, and the braking performance of the tripping structure is improved.

Description

Technical Field

[0001] This invention relates to the field of electrical control technology, and in particular to a tripping structure and circuit breaker. Background Technology

[0002] Circuit breakers are commonly used components in the electrical field, primarily used to connect and disconnect current, and to provide protection for lines and equipment in the event of overcurrent or short circuit. Modern circuit breakers typically have a tripping mechanism, which releases the holding mechanism and causes the circuit breaker to automatically disconnect.

[0003] In current circuit breakers, the tripping mechanism drives the traction rod to rotate, thus achieving the circuit breaker's breaking function. Most current tripping mechanisms operate through manual or magnetic tripping. However, current magnetic tripping mechanisms are complex in structure and have poor braking performance. Summary of the Invention

[0004] This application aims to provide a tripping structure and circuit breaker to solve the problems of complex structure and poor braking performance of current tripping structures.

[0005] The present application adopts the following solution to solve the above-mentioned technical problems.

[0006] In a first aspect, this application provides a tripping structure, applied in a circuit breaker and used to drive the circuit breaker to trip, comprising: The traction component is used to cooperate with the operating mechanism and is driven by the tripping assembly to rotate and cause the operating mechanism to trip. Tripping assembly, including: permanent magnet; An electromagnet includes a magnetic core and a coil, wherein the magnetic core is configured to be attracted to a first position by the permanent magnet when the coil is in a non-conductive state, and to be repelled to a second position by the permanent magnet when the coil is in a conductive state; An actuating rod is disposed at one end of the magnetic core near the permanent magnet, and extends along one end away from the magnetic core, passing through the permanent magnet to the traction member position; the actuating rod is configured to follow the movement of the magnetic core and drive the traction member to move when the magnetic core moves from the first position to the second position; A spring is sleeved on the end of the electromagnet that is away from the permanent magnet, and the spring is configured to be in a compressed state when the electromagnet is in the first position, and to provide a positive driving force for the electromagnet to move to the second position; wherein the elastic force of the spring in the compressed state is less than the attraction force of the permanent magnet on the electromagnet.

[0007] In some embodiments of this application, the tripping assembly further includes a first housing, in which the electromagnet and the permanent magnet are both housed. The magnetic core has a first end extending out of the first housing along a first direction, the first direction being the direction in which the magnetic core is away from the permanent magnet. A sleeve is provided on the first end, and the spring is pressed between the sleeve and the first housing.

[0008] In some embodiments of this application, the first housing includes a fixing plate with a first through hole, the magnetic core includes a first sub-part housed within the first housing and a second sub-part extending out of the first housing along the first through hole, and the coil is wound around the first sub-part. The radial dimension of the first sub-part is greater than the radial dimensions of the first through hole and the second sub-part.

[0009] In some embodiments of this application, the tripping structure further includes a transmission assembly, which includes a sliding column and a sliding block. The sliding block is provided with a pressing part, which is located at the end of the sleeve away from the spring. The sliding block is configured to slide along the sliding post, and the pressing part presses the sleeve to drive the magnetic core from the second position to the first position.

[0010] In some embodiments of this application, the transmission assembly includes a fixed frame, and the sliding column is fixed on the fixed frame; wherein, the fixed frame is also fixed to the first housing.

[0011] In some embodiments of this application, the tripping structure further includes a drive assembly, which includes a rotating shaft and a drive shaft. The drive shaft follows the rotating shaft and rotates around the rotating shaft. The sliding block is provided with a second through hole, which has an inner wall. The drive shaft passes through the second through hole and can slide along at least a portion of the inner wall to drive the sliding block to slide along the sliding post.

[0012] In some embodiments of this application, the rotating shaft passes through the second through hole to fix the sliding direction of the sliding block.

[0013] In some embodiments of this application, the drive assembly further includes a drive gear, a driven gear, and a motor. The drive gear drives the driven gear to rotate under the drive of the motor. The rotating shaft and the driven gear are coaxially driven. A rotating disk is fixed on the rotating shaft. The drive shaft is disposed on the rotating disk and rotates around the rotating shaft following the rotating disk.

[0014] In some embodiments of this application, the traction member has a first slot, and the actuating rod has a second end that passes through the first slot; an end cap is provided on the second end, and the radial dimension of the end cap is greater than the radial dimension of the first slot.

[0015] Secondly, this application also provides a circuit breaker including the tripping structure described above.

[0016] This application provides a tripping structure and circuit breaker. The tripping structure is applied in a circuit breaker to separate the moving and stationary contacts. The tripping structure includes a traction member and a tripping assembly. The tripping assembly includes an electromagnet, a permanent magnet, a spring, and an actuating rod. The electromagnet includes a magnetic core and a coil. The tripping structure in this application has a simple structure. The actuating rod drives the traction member to move, causing the operating mechanism to trip and realizing the circuit breaker's breaking function. Furthermore, by setting the coil to be repelled to a second position by the permanent magnet in a conductive state, the magnetic core drives the actuating rod to move, thus actuating the traction member. On the other hand, by setting the spring, the spring force can drive the magnetic core from a first position to a second position, which can play an auxiliary actuation role, which is beneficial to improving the actuation strength of the traction member and thus improving the braking performance of the tripping structure. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in 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 only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of a circuit breaker provided in an embodiment of the present invention; Figure 2 This is a partial exploded view of a circuit breaker provided in an embodiment of the present invention; Figure 3 This is a schematic diagram of the tripping structure provided in an embodiment of the present invention; Figure 4 This is a first cross-sectional schematic diagram of a tripping structure provided in an embodiment of the present invention; Figure 5 This is a second cross-sectional schematic diagram of a tripping structure provided in an embodiment of the present invention; Figure 6 For the present invention Figure 4 A magnified view of part B; Figure 7 For the present invention Figure 4 A magnified view of part A; Figure 8This is a schematic diagram of a tripping structure provided in another embodiment of the present invention; Figure 9 This is a third cross-sectional schematic diagram of a tripping structure provided in another embodiment of the present invention; Figure 10 This is a fourth cross-sectional view of the tripping structure provided in another embodiment of the present invention; Figure 11 This is a schematic diagram of the tripping structure provided in another embodiment of the present invention; Figure 12 For the present invention Figure 1 A magnified view of a portion of C.

[0019] Explanation of key component symbols: 100-Traction component, 110-First slot, 200-Trigger assembly, 210-Electromagnet, 211-Sleeve, 212-First end, 213-First sub-part, 214-Second sub-part, 215-Coil, 220-Spring, 230-Actuating rod, 231-Second end, 232-End cap, 240-First housing, 241-Fixing plate, 242-First through hole, 250-Permanent magnet, 300-Transmission assembly, 310-Fixing frame, 320-Sliding block, 321-Second through hole, 322-Pressing part, 330-Sliding column, 400-Drive assembly, 410-Rotating shaft, 411-Rotating disk, 420-Drive shaft, 430-Driven gear, 440-Drive gear, 500-Circuit breaker, a-First direction. Detailed Implementation

[0020] 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 the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. In the description of the present invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0021] In this application, the term "exemplary" is used to mean "serving as an example, illustration, or description." Any embodiment described as "exemplary" in this application is not necessarily to be construed as being more preferred or advantageous than other embodiments. The following description is provided to enable any person skilled in the art to make and use the invention. Details are set forth in the following description for purposes of explanation. It should be understood that those skilled in the art will recognize that the invention can be made without using these specific details. In other embodiments, known structures and processes are not described in detail to avoid obscuring the description of the invention with unnecessary detail. Therefore, the invention is not intended to be limited to the embodiments shown, but is consistent with the broadest scope of the principles disclosed in this application.

[0022] As circuit breakers become increasingly smaller, their tripping mechanisms also need to be optimized to meet the evolving needs of circuit breakers.

[0023] Based on this, this application proposes a tripping structure and a circuit breaker that can solve the above problems.

[0024] Please see Figure 1 and Figure 2 , Figure 1 A schematic diagram of the circuit breaker 500 provided in this embodiment is shown. Figure 2 An exploded view of a portion of the circuit breaker 500 in this embodiment is shown. The circuit breaker 500 in this embodiment includes a tripping structure, which comprises a traction member 100 and a tripping assembly 200. The traction member is used to drive the circuit breaker to trip, and the tripping assembly 200 is used to actuate the traction member 100. The circuit breaking control of the circuit breaker 500 can be achieved by controlling the tripping assembly 200.

[0025] The traction member 100 is used to cooperate with the operating mechanism and is driven by the tripping assembly 200 to rotate, thereby disengaging the operating mechanism. See also... Figure 3 , Figure 3 A schematic diagram of the tripping structure provided in this embodiment is shown; the tripping assembly 200 includes an electromagnet 210, a permanent magnet 250, a spring 220, and an actuating rod 230. It should be explained that the electromagnet 210 typically has a conductive state and a non-conductive state; in the conductive state, the electromagnet 210 has magnetic force, and in the non-conductive state, the electromagnet 210 does not have magnetic force. The permanent magnet 250 is generally a ferromagnetic material, capable of forming a magnetic field that attracts other magnetic objects.

[0026] Further, please refer to Figure 4 and Figure 5 , Figure 4 A first cross-sectional schematic diagram of the tripping structure is shown (corresponding to the magnetic core being in the first position); Figure 5A second cross-sectional view of the tripping structure is shown (corresponding to the magnetic core being in the second position). The electromagnet 210 includes a magnetic core and a coil 215, and the conductive state of the electromagnet 210 corresponds to the conductive state of the coil 215, and the non-conductive state of the electromagnet 210 corresponds to the non-conductive state of the coil 215. That is, when the coil 215 is energized, the magnetic core can generate a magnetic field force; when the coil 215 is de-energized, the magnetic core does not have a magnetic field force. The magnetic core is configured such that when the coil 215 is in a non-conductive state, the magnetic core is attracted to the permanent magnet 250 to a first position, and when the coil 215 is in a conductive state, the magnetic core is repelled by the permanent magnet 250 to a second position. It can be understood that when the circuit breaker 500 is operating normally, the circuit is normally conductive, there is no current in the coil 215, therefore the magnetic core can be attracted to the permanent magnet 250. When the circuit breaker 500 experiences overcurrent, short circuit, or leakage, the circuit breaker controller (not shown in the figure) sends a trip signal, a current is generated in the coil 215, and the magnetic core generates a magnetic field force that repels the permanent magnet 250, driving the magnetic core away from the permanent magnet 250.

[0027] Please see Figure 6 , Figure 6 It shows Figure 4 A partial enlarged view (B) shows the actuating rod 230 located at the end of the magnetic core near the permanent magnet 250, extending along the end away from the magnetic core and passing through the permanent magnet 250 to the traction member 100. In other words, the actuating rod 230 is located on the magnetic core, can move with the magnetic core, and can extend to the traction member 100. The actuating rod 230 is configured to follow the magnetic core's movement and drive the traction member 100 to move when the magnetic core moves from a first position to a second position. Specifically, when the circuit breaker 500 needs to trip, a current is generated in the coil 215, and a repulsive force is generated between the magnetic core and the permanent magnet 250. Under the action of the repulsive force, the magnetic core moves away from the permanent magnet 250, simultaneously driving the actuating rod 230 to move the traction member 100, thereby triggering the circuit breaker tripping.

[0028] In some embodiments, the magnetic core is provided with a threaded hole, which is threadedly connected to the actuating rod 230.

[0029] Spring 220 is sleeved on the end of electromagnet 210 away from permanent magnet 250, and spring 220 is configured such that when electromagnet 210 is in the first position, spring 220 is in a compressed state and provides positive driving force for electromagnet 210 to move to the second position.

[0030] Understandably, when the spring 220 is in a compressed state, it applies an elastic force to the magnetic core, which drives the magnetic core to move to the second position. The elastic force of the spring 220 in the compressed state is less than the attraction force of the permanent magnet 250 on the magnetic core, ensuring that the magnetic core is stably attached to the permanent magnet 250 in the non-conductive state.

[0031] The tripping structure in this application is simple in structure. The actuating rod 230 drives the traction member 100 to move, thereby driving the operating mechanism to trip and realizing the circuit breaker 500's circuit-breaking function. Furthermore, by setting the coil 215 to a conductive state, the magnetic core is repelled to a second position by the permanent magnet 250, which in turn drives the actuating rod 230 to actuate the traction member 100. On the other hand, by providing a spring 220, the spring force can drive the magnetic core from the first position to the second position, which can play an auxiliary actuation role, improving the actuation strength of the traction member and thus enhancing the braking performance of the tripping structure. For some embodiments of this application, please refer to... Figure 7 , Figure 7 It shows Figure 4 A partial enlarged view (A) shows the tripping assembly 200 in this embodiment. The tripping assembly 200 further includes a first housing 240, within which at least a portion of the electromagnet 210 and the permanent magnet 250 are housed. The magnetic core has a first end portion 212 extending out of the first housing 240 along a first direction a, where the first direction a is the direction in which the magnetic core is away from the permanent magnet 250. A sleeve 211 is provided on the first end portion 212, and a spring 220 is pressed between the sleeve 211 and the first housing 240. That is, the distance between the sleeve 211 and the first housing 240 continuously changes to compress the spring 220.

[0032] In some embodiments, the spring 220 may be sleeved outside the first housing 240, sleeved outside the sleeve 211, or disposed between the first housing 240 and the sleeve 211, with the spring 220 connected to the first housing 240 and the sleeve 211 respectively.

[0033] Please refer to the embodiments described in this application. Figure 7 In this embodiment, the first housing 240 includes a fixing plate 241, on which a first through hole 242 is provided. The magnetic core includes a first sub-part 213 housed within the first housing 240 and a second sub-part 214 extending out of the first housing 240 along the first through hole 242. A coil 215 is wound around the first sub-part 213. The radial dimension of the first sub-part 213 is larger than the radial dimensions of the first through hole 242 and the second sub-part 214. In some embodiments, one end of the spring 220 acts on the sleeve 211 and the other end acts on the fixing plate 241.

[0034] In some embodiments, the sleeve 211 has a third through hole at its center, into which the electromagnet 210 can extend and be fixed by a washer. The electromagnet 210 includes a third sub-part extending into the third through hole. The radial dimension of the third sub-part is between the radial dimensions of the first sub-part 213 and the second sub-part 214. For example, if the first sub-part 213, the second sub-part 214, and the third sub-part are all columnar structures, then the diameter of the first sub-part 213 is larger than the diameter of the third sub-part, and the diameter of the third sub-part is larger than the diameter of the second sub-part 214.

[0035] In some embodiments of this application, please refer to Figure 8 , Figure 9 as well as Figure 10 , Figure 8 A schematic diagram of the tripping structure in this embodiment is shown. Figure 9 This diagram shows a third cross-sectional view of the tripping structure in this embodiment. Figure 10 A fourth cross-sectional view of the tripping structure in this embodiment is shown. The tripping structure in this embodiment also includes a transmission assembly 300, which includes a sliding post 330 and a sliding block 320. A pressing part 322 is provided on the sliding block 320, and the pressing part 322 is located at the end of the sleeve 211 opposite to the spring 220. That is, the pressing part 322 moves by the sliding block 320 sliding on the sliding post 330.

[0036] The sliding block 320 is configured to slide along the sliding post 330, and the pressing part 322 presses the sleeve 211 to drive the magnetic core from the second position to the first position. Pressing the sleeve 211 by the pressing part 322 causes the magnetic core to move along the end near the permanent magnet 250. This facilitates driving the magnetic core from the second position to the first position, thereby achieving the reset of the tripping structure.

[0037] Please refer to the embodiments described in this application. Figure 8 In this embodiment, the transmission assembly 300 includes a fixed frame 310, and a sliding column 330 is fixed on the fixed frame 310; wherein, the fixed frame 310 is also fixed to the first housing 240. In some embodiments, the fixed frame 310 and the first housing 240 are fixed by bolts.

[0038] In some embodiments of this application, please refer to Figure 11 , Figure 11A schematic diagram of the tripping structure provided in this embodiment is shown. The tripping structure in this embodiment also includes a drive assembly 400, which includes a rotating shaft 410 and a drive shaft 420. The drive shaft 420 follows and rotates around the rotating shaft 410. A second through hole 321 is provided on the sliding block 320. The second through hole 321 has an inner wall. The drive shaft 420 passes through the second through hole 321 and can slide along at least a portion of the inner wall to drive the sliding block 320 to slide along the sliding post 330. The drive assembly 400 facilitates the automatic reset of the tripping structure.

[0039] In some embodiments of this application, please refer to Figure 12 , Figure 12 It shows Figure 1 A partial enlarged view of C; in this embodiment, the rotating shaft 410 passes through the second through hole 321 to fix the sliding direction of the sliding block 320, which helps to improve the stability of the transmission.

[0040] Please refer to the embodiments described in this application. Figure 11 The drive assembly 400 also includes a drive gear 440, a driven gear 430, and a motor. The drive gear 440 drives the driven gear 430 to rotate under the drive of the motor. The rotating shaft 410 and the driven gear 430 are coaxially driven. A rotating disk 411 is fixed on the rotating shaft 410, and the drive shaft 420 is mounted on the rotating disk 411 and rotates around the rotating shaft 410 following the rotating disk 411.

[0041] In some embodiments, the drive gear 440 is rotated by a DC motor and a gearbox.

[0042] In some embodiments of this application, please refer to Figure 3 and Figure 6 The traction member 100 has a first slot 110, and the actuating rod 230 has a second end 231 that passes through the first slot 110. An end cap 232 is provided on the second end 231, and the radial dimension of the end cap 232 is larger than the radial dimension of the first slot 110. Because the size of the end cap 232 is larger than the size of the first slot 110, during the movement of the magnetic core from the first position to the second position, the end cap 232 is engaged in the first slot 110, thereby driving the traction member 100 to move and realizing the circuit breaker 500's circuit breaking function.

[0043] The tripping mechanism operates as follows: When the circuit is normal, coil 215 does not generate an electromagnetic field, and permanent magnet 250 tightly attracts the magnetic core, while simultaneously compressing spring 220. At this time, end cap 232 of actuating rod 230 passes through the first slot 110 and may not be attached to traction member 100. When the circuit experiences overcurrent, short circuit, or leakage, and the circuit breaker controller (not shown in the figure) issues a tripping signal, coil 215 generates an electromagnetic field, and the magnetic core and permanent magnet 250 repel each other. Under the action of repulsion and the elastic force of spring 220, the magnetic core moves away from permanent magnet 250, driving actuating rod 230 and end cap 232 to move, thereby driving traction member 100 to rotate and achieving rapid braking of circuit breaker 500.

[0044] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the detailed descriptions of other embodiments above, which will not be repeated here.

[0045] The basic concepts have been described above. Obviously, for those skilled in the art, the detailed disclosure above is merely illustrative and does not constitute a limitation of this application. Although not explicitly stated herein, those skilled in the art may make various modifications, improvements, and corrections to this application. Such modifications, improvements, and corrections are suggested in this application, and therefore remain within the spirit and scope of the exemplary embodiments of this application.

[0046] Furthermore, this application uses specific terms to describe embodiments of the application. For example, "an embodiment," "one embodiment," and / or "some embodiments" refer to a particular feature, structure, or characteristic associated with at least one embodiment of the application. Therefore, it should be emphasized and noted that "an embodiment," "one embodiment," or "an alternative embodiment" mentioned twice or more in different locations in this specification do not necessarily refer to the same embodiment. In addition, certain features, structures, or characteristics in one or more embodiments of the application can be appropriately combined.

[0047] Similarly, it should be noted that, in order to simplify the description of the present application and thus aid in the understanding of one or more embodiments of the invention, the foregoing description of the embodiments of the present application sometimes combines multiple features into a single embodiment, drawing, or description thereof. However, this disclosure method does not imply that the subject matter of the application requires more features than those mentioned in the claims. In fact, the embodiments contain fewer features than all the features of the single embodiments disclosed above.

[0048] Accordingly, in some embodiments, the numerical parameters used in the specification and claims are approximate values, which may be changed depending on the characteristics required by individual embodiments. In some embodiments, the numerical parameters should take into account a specified number of significant digits and employ a general method of digit preservation. Although the numerical ranges and parameters used to confirm their breadth of application in some embodiments of this application are approximate values, in specific embodiments, such values ​​are set as precisely as feasible.

[0049] For each patent, patent application, patent application publication, and other material such as articles, books, specifications, publications, and documents referenced in this application, the entire contents of that patent application are incorporated herein by reference, except for historical application documents that are inconsistent with or conflict with the content of this application, and documents that limit the broadest scope of the claims of this application (currently or subsequently appended to this application). It should be noted that if there are any inconsistencies or conflicts between the descriptions, definitions, and / or terminology used in the supplementary materials of this application and the content of this application, the descriptions, definitions, and / or terminology used in this application shall prevail.

[0050] The technical solutions provided by the embodiments of this application have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of the present invention. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of the present invention. Therefore, the content of this specification should not be construed as a limitation of the present invention.

Claims

1. A tripping structure, applied in a circuit breaker and used to drive the circuit breaker to trip, characterized in that, include: The traction component is used to cooperate with the operating mechanism and is driven by the tripping assembly to rotate and cause the operating mechanism to trip. Tripping assembly, including: permanent magnet; An electromagnet includes a magnetic core and a coil, wherein the magnetic core is configured to be attracted to a first position by the permanent magnet when the coil is in a non-conductive state, and to be repelled to a second position by the permanent magnet when the coil is in a conductive state; An actuating rod is disposed at one end of the magnetic core near the permanent magnet, and extends along one end away from the magnetic core, passing through the permanent magnet to the traction member position; the actuating rod is configured to follow the movement of the magnetic core and drive the traction member to move when the magnetic core moves from the first position to the second position; A spring is sleeved on the end of the electromagnet facing away from the permanent magnet, and the spring is configured to be in a compressed state when the electromagnet is in the first position, and to provide a positive driving force for the electromagnet to move to the second position; wherein the elastic force of the spring in the compressed state is less than the attraction force of the permanent magnet on the electromagnet; The tripping assembly further includes a first housing, in which the electromagnet and the permanent magnet are both housed. The magnetic core has a first end extending out of the first housing along a first direction, the first direction being the direction in which the magnetic core is away from the permanent magnet. A sleeve is provided on the first end, and the spring is pressed between the sleeve and the first housing. The tripping structure also includes a transmission assembly, which includes a sliding column and a sliding block. The sliding block is provided with a pressing part, which is located at the end of the sleeve away from the spring. The sliding block is configured to slide along the sliding post, and the pressing part presses the sleeve to drive the magnetic core from the second position to the first position; The tripping structure further includes a drive assembly, which includes a rotating shaft and a drive shaft. The drive shaft follows the rotating shaft and rotates around the rotating shaft. The sliding block is provided with a second through hole, which has an inner wall. The drive shaft passes through the second through hole and can slide along at least part of the inner wall to drive the sliding block to slide along the sliding post. A rotating disk is fixed on the rotating shaft, and the drive shaft is mounted on the rotating disk and rotates around the rotating shaft following the rotating disk.

2. The tripping structure according to claim 1, characterized in that, The first housing includes a fixing plate with a first through hole. The magnetic core includes a first sub-part housed inside the first housing and a second sub-part extending out of the first housing along the first through hole. The coil is wound around the first sub-part. The radial dimension of the first sub-part is greater than the radial dimensions of the first through hole and the second sub-part.

3. The tripping structure according to claim 1, characterized in that, The transmission assembly includes a fixed frame, and the sliding column is fixed on the fixed frame; wherein, the fixed frame is also fixed to the first housing.

4. The tripping structure according to claim 1, characterized in that, The rotating shaft passes through the second through hole to fix the sliding direction of the sliding block.

5. The tripping structure according to claim 1, characterized in that, The drive assembly also includes a drive gear, a driven gear, and a motor. The drive gear drives the driven gear to rotate under the drive of the motor. The rotating shaft and the driven gear are coaxially connected.

6. The tripping structure according to claim 1, characterized in that, The traction member has a first slot, and the actuating rod has a second end that passes through the first slot; an end cap is provided on the second end, and the radial dimension of the end cap is greater than the radial dimension of the first slot.

7. A circuit breaker, characterized in that, Includes the tripping structure as described in any one of claims 1 to 6.

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