Magnetic control circuit breaker

Abstract

The magnetic control circuit breaker comprises an operating mechanism and an electromagnetic system, the operating mechanism comprises a reset spring, a support, a moving shaft which is driven by the electromagnetic system and is arranged in a linear moving mode on the support, a connecting rod which is connected with the moving shaft and is used for driving a moving contact, a lock catch and a traction rod which are respectively arranged in a rotating mode on the support, a lock catch spring and a traction rod spring which are respectively connected with the lock catch and the traction rod, the moving shaft is in position-limiting cooperation with the lock catch, and a roller is arranged on the traction rod and is arranged in a rotating mode and is in position-limiting cooperation with the lock catch. The magnetic control circuit breaker has the advantages that the electromagnetic driving force of the electromagnetic system drives the connecting rod to move through the moving shaft, and then drives the moving contact to contact and separate from a static contact, the circuit breaker is stably kept in a closing state by the roller on the traction rod, the lock catch and the moving shaft in a forward position-limiting mode in sequence, and the circuit breaker is stably kept in an opening state by the roller on the traction rod, the lock catch and the moving shaft in a reverse position-limiting mode in sequence, the magnetic control circuit breaker is realized to open and close, the number of parts is reduced, the structure of the operating mechanism is simplified, and the movement reliability is improved.

Description

Technical Field

[0001] This utility model relates to the field of low-voltage electrical appliances, specifically to a magnetically controlled circuit breaker. Background Technology

[0002] Magnetic-controlled molded case circuit breakers are an upgrade of traditional molded case circuit breaker technology. They can connect and disconnect normal load currents and overload currents, as well as short-circuit currents. Compared to traditional molded case circuit breakers, magnetically controlled circuit breakers solve the problems of structural complexity and insufficient intelligence in spring-operated mechanisms. Furthermore, magnetic control technology replaces mechanical springs with electromagnetic drives, significantly reducing opening and closing response times, making it of significant application value in the field of low-voltage circuit breakers.

[0003] Despite the significant advantages of magnetically controlled circuit breakers, the operating mechanism still has many limitations in existing technologies due to the characteristics of magnetically controlled opening and closing technology. The operating mechanism suffers from structural complexity, high precision assembly requirements, and insufficient operational reliability.

[0004] Therefore, there is an urgent need for a magnetically controlled circuit breaker operating mechanism to solve the above-mentioned technical problems. Utility Model Content

[0005] The purpose of this invention is to overcome at least one defect of the prior art and provide a magnetically controlled circuit breaker.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A magnetically controlled circuit breaker includes an operating mechanism and an electromagnetic system. The operating mechanism includes a return spring, a bracket, a movable shaft driven by the electromagnetic system and linearly mounted on the bracket, a connecting rod connected to the movable shaft and used to drive a moving contact, a latch and a traction rod respectively rotatably mounted on the bracket, and a latch spring and a traction rod spring respectively connected to the latch and the traction rod. The movable shaft is limited to the latch, and the traction rod is provided with a roller, which is rotatably mounted and limited to the latch.

[0008] When the electromagnetic system is energized, it drives the moving shaft to move from the first position to the second position. The moving shaft drives the moving contact and the stationary contact to make contact through the connecting rod. At the same time, it drives the return spring to store energy. The moving shaft releases the limit on the latch, causing the latch to rotate from the first position to the second position under the drive of the latch spring. The latch then limits the moving shaft to the second position and prevents it from moving back to the first position. The latch also releases the limit on the roller, causing the traction rod to rotate from the first position to the second position under the drive of the traction rod spring. This causes the roller to limit the latch to the second position and prevent it from rotating back to the first position.

[0009] When the traction rod is driven by the tripping drive force to overcome the force of the traction rod spring and rotate from the second position to the first position, the traction rod drives the roller to release the limit on the latch, thereby the return spring releases energy and drives the moving contact and stationary contact to separate. At the same time, the return spring drives the moving shaft from the second position to the first position. The moving shaft drives the latch to overcome the force of the latch spring and rotate from the second position to the first position, and limits the latch to the first position and prevents it from rotating to the second position. In turn, the latch, through the roller, limits the traction rod to the first position and prevents it from rotating to the second position.

[0010] Optionally, during the circuit breaker closing process, the electromagnetic system is energized first, driving the moving shaft from the first position to the second position, and then to the third position.

[0011] When the electromagnetic system loses power again, the reset spring drives the moving shaft to move from the third position to the second position.

[0012] Optionally, the end of the latch near the electromagnetic system is rotatably mounted on the bracket, and the other end of the latch away from the electromagnetic system is provided with a first latch limiting surface and a first latch mating surface that respectively cooperate with the moving shaft limiting, and a second latch limiting surface and a second latch mating surface that respectively cooperate with the roller limiting.

[0013] When the movable shaft is in the first position, the latch is fixed in the first position by acting on the first latch mating surface, and the latch acts on the roller through the second latch limiting surface to fix the traction rod in the first position.

[0014] When the traction rod is in the second position, the roller acts on the second locking mating surface to limit the locking in the second position, and the locking acts on the moving shaft through the first locking limiting surface to limit the moving shaft in the second position.

[0015] Optionally, the first locking limiting surface, the first locking mating surface, the second locking limiting surface, and the second locking mating surface are connected at an included angle in sequence.

[0016] Optionally, the latch includes at least one latch plate. Each latch plate includes a latch plate body, a latch limiting part and a latch rotating part that are bent and connected to both ends of the latch plate body. The latch limiting part is provided with a first latch limiting surface, a first latch mating surface, a second latch limiting surface and a second latch mating surface. The latch rotating part is rotatably mounted on the bracket. The latch rotating part is provided with a latch stop surface that is spaced apart from the first latch limiting surface. The latch plate body has adjacent first latch side and second latch side. The first latch limiting surface and the latch stop surface are connected to the first latch side at an angle to form a latch notch. The second latch mating surface is connected to the second latch side at an angle to form a latch gap.

[0017] Optionally, the latch includes two latch plates spaced apart and opposite to each other along the rotation center direction of the latch, and a latch connecting part connected between the two latch plates. The latch connecting part is U-shapedly connected to the latch plate bodies of the two latch plates, and the side of the latch plate body opposite to the latch connecting part serves as the first latch side.

[0018] Optionally, the latch is provided with a first latch positioning part, and the bracket is provided with a first bracket stop part. The first bracket stop part and the first latch positioning part are mutually limiting and cooperating to position the latch in the second latch position.

[0019] And / or, the two sides of the latch are respectively provided with second latch positioning parts protruding along the rotation center direction of the latch, and the bracket is provided with two bracket limiting surfaces, which respectively cooperate with the second latch positioning parts on both sides of the latch to limit the latch between the two bracket limiting surfaces in the rotation center direction of the latch.

[0020] Optionally, the traction rod is provided with a traction rod positioning part, and the bracket is provided with a second bracket stop part. The second bracket stop part cooperates with the traction rod positioning part to limit the positioning of the traction rod in the second position of the traction rod.

[0021] Optionally, the magnetically controlled circuit breaker includes a trip unit, and the traction rod is provided with a first trigger part that cooperates with the trip unit. When the trip unit acts on the first trigger part, it provides a tripping driving force to the traction rod.

[0022] And / or, the magnetically controlled circuit breaker includes a trip button, and the traction rod is provided with a second trigger part that cooperates with the trip button. When the trip button acts on the second trigger part, it provides a tripping driving force to the traction rod.

[0023] And / or, the magnetically controlled circuit breaker includes a short-circuit protection mechanism, and the traction rod is provided with a third trigger part that cooperates with the short-circuit protection mechanism. When the short-circuit protection mechanism acts on the third trigger part, it provides a tripping driving force for the traction rod.

[0024] And / or, the magnetically controlled circuit breaker includes an overload protection mechanism, and the traction rod is provided with a fourth trigger part that cooperates with the overload protection mechanism. When the overload protection mechanism acts on the fourth trigger part, it provides a tripping driving force to the traction rod.

[0025] Optionally, the bracket is provided with a guide hole, and the movable shaft is slidably inserted into the guide hole along the length direction of the guide hole. The outer diameter of the movable shaft is the same as the width of the guide hole and smaller than the length of the guide hole.

[0026] Optionally, the operating mechanism is located above the moving contact and the stationary contact in the second direction, the moving shaft is linearly movable along the first direction, the rotation centers of the latch, the traction rod, the roller, and the moving contact, and the axis of the moving shaft are respectively arranged along a third direction and are parallel to each other and spaced apart, the axis of the moving shaft and the rotation center of the roller are located on one side of the line connecting the rotation centers of the latch and the traction rod, and the rotation center of the moving contact is located on the other side of the line connecting the rotation centers of the latch and the traction rod, and the first direction, the second direction and the third direction are perpendicular to each other.

[0027] Optionally, the electromagnetic system is located on one side of the support of the operating mechanism in the first direction and above the moving contact and the stationary contact in the second direction; the electromagnetic system drives the moving shaft through a pull rod, the moving contact is set on the rotating shaft, the connecting rod is connected between the moving shaft and the rotating shaft, one end of the pull rod and the connecting rod are respectively hinged to the moving shaft, the other end of the pull rod is fixedly connected to the moving iron core of the electromagnetic system, and the other end of the connecting rod and the rotating shaft are respectively hinged to the transmission shaft.

[0028] The magnetically controlled circuit breaker of this utility model uses the electromagnetic driving force of the electromagnetic system to drive the connecting rod through the moving shaft, thereby causing the moving contact to contact and separate from the stationary contact. The circuit breaker is stabilized in the closed state by the rollers, latches and moving shaft on the traction rod in the forward direction and in the open state by the reverse direction. This realizes the opening and closing of the magnetically controlled circuit breaker, reduces the number of parts, simplifies the structure of the operating mechanism and improves the reliability of the operation.

[0029] In addition, the electromagnetic system provides closing overtravel for the moving shaft, and the closing travel margin ensures that the latch and the traction rod can be reliably reset.

[0030] Furthermore, the locking mechanism with the moving shaft and roller limiting structure is simple, reducing the requirements for manufacturing and assembly precision. Since the rotation center of the locking mechanism is located at the end of the locking mechanism closer to the electromagnetic system, and the limiting structure between the locking mechanism and the moving shaft is located at the other end of the locking mechanism away from the electromagnetic system, when the circuit breaker is closed, the moving shaft moves towards the rotation center of the locking mechanism until it engages with the first locking surface. The locking mechanism applies a positive pressure to the roller on the traction rod, at which point the operating mechanism is in the closed and locked state. When the traction rod is driven by the opening driving force, the traction rod overcomes the rolling friction applied by the locking mechanism and rotates counterclockwise until the circuit breaker is opened. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the structure of the circuit breaker of this utility model;

[0032] Figure 2 This is a schematic diagram of the circuit breaker of this utility model without the intermediate seat and face cover;

[0033] Figure 3 This is a cross-sectional view of the operating mechanism, electromagnetic system, conductive system, and short-circuit and overload protection mechanism of this utility model when the circuit is closed.

[0034] Figure 4 This is a cross-sectional view of the operating mechanism, electromagnetic system, conductive system, and short-circuit and overload protection mechanism of this utility model when the circuit is tripped;

[0035] Figure 5 This is a schematic diagram of the bracket, latch, and traction rod of this utility model from one perspective;

[0036] Figure 6 This is a schematic diagram of the bracket, latch, and traction rod of this utility model from another perspective;

[0037] Figure 7 This is a schematic diagram of the structure of the latch of this utility model;

[0038] Figure 8 This is a structural schematic diagram of the bracket of this utility model;

[0039] Figure 9 This is a schematic diagram of the structure of the traction rod of this utility model.

[0040] Operating mechanism 1; Housing 2; Base 21; Middle seat 22; Face cover 23; Rotating shaft 3; Return spring 31; Contact spring 32; Moving contact 41; Stationary contact 42; First connecting plate 43; Second connecting plate 44; Conductive plate 45; Trip unit 5; Opening button 6; Short circuit protection mechanism 7; Magnetic yoke 71; Armature 72; Armature spring 73; Overload protection mechanism 8;

[0041] Bracket 100; Locking rotating shaft 101; Traction rod rotating shaft 102; Bracket side plate 110; Bracket limiting surface 111; Guide hole 112; First mounting hole 113; Second mounting hole 114; Bracket top plate 120; First bracket stop part 121; Bracket fixing foot 130; Second bracket stop part 131; Bracket hook 140;

[0042] Electromagnetic system 200; Moving shaft 210; Pull rod 220; Moving iron core 230; Stationary iron core 240; Coil 250;

[0043] Connecting rod 300; Drive shaft 301;

[0044] 400; 401; 410; 411; 412; 413; 414; 420; 421; 422; 430; 431; 432; 440; 450; 460; 470; 480; 470; 480;

[0045] 500; 501; 502; 503; 510; 520; 521; 530; 540; 550; 560; 570; 580; 500; 590; 500; 500; 500; 501; 502; 503; 510; 520; 501; 502; 503; 504; 505; 506; 507; 508; 509; 50 ...00; 500; 501; 502; Detailed Implementation

[0046] The specific embodiments of the magnetically controlled circuit breaker of this utility model are further described below with reference to the accompanying drawings. The magnetically controlled circuit breaker of this utility model is not limited to the descriptions in the following embodiments.

[0047] like Figure 1-2As shown, the magnetically controlled circuit breaker of this embodiment includes a housing 2, a rotating shaft 3 disposed within the housing 2, at least one phase conductive system, a control system, an electromagnetic system 200, and an operating mechanism 1. The housing 2 includes a base 21, a middle seat 22, and a face cover 23 that are sequentially connected and fitted together. The base 21, the middle seat 22, and the face cover 23 can be fixedly connected by screws, snap-fit ​​connections, or other methods. Each phase conductive system includes a moving contact 41 disposed on the rotating shaft 3, a stationary contact 42 disposed opposite to the moving contact 41, and a first connecting plate 43 and a second connecting plate 44 electrically connected to the moving contact 41 and the stationary contact 42, respectively. In this embodiment, the stationary contact 42 and the second connecting plate 44 are integrally connected. Of course, in other embodiments, the stationary contact 42 and the second connecting plate 44 can also be separately disposed, and the stationary contact 42 and the second connecting plate 44 can be fixedly connected by welding, screws, or other methods.

[0048] In this embodiment, the magnetically controlled circuit breaker includes a shaft spring connected to the shaft 3 and used to reset the shaft 3, and a contact spring 32 connected between the shaft 3 and the moving contact 41 and used to provide final pressure for the contact between the moving contact 41 and the stationary contact 42. The shaft spring is a tension spring, but it can also be a torsion spring, compression spring, etc.; the contact spring 32 is a torsion spring, but it can also be a tension spring, compression spring, etc.

[0049] like Figure 2-4 As shown, the operating mechanism 1 of the magnetically controlled circuit breaker in this embodiment includes a return spring 31, a bracket 100, a movable shaft 210 driven by an electromagnetic system 200 and linearly mounted on the bracket 100, a connecting rod 300 connected to the movable shaft 210 and used to drive the moving contact 41, a latch 400 and a traction rod 500 respectively rotatably mounted on the bracket 100, and a latch spring 401 and a traction rod spring 501 respectively connected to the latch 400 and the traction rod 500. The movable shaft 210 is in a limiting engagement with the latch 400, and the traction rod 500 is provided with a roller 502, which is rotatably mounted and in a limiting engagement with the latch 400. The return spring 31 is a pivot spring. In other embodiments, the return spring 31 may also be connected to the movable shaft 210, the connecting rod 300, or other components.

[0050] like Figure 3As shown, when the control system sends a closing signal, the control electromagnetic system 200 is energized. When the electromagnetic system 200 is energized, it drives the moving shaft 210 from the first position to the second position. The moving shaft 210 drives the moving contact 41 and the stationary contact 42 to contact through the connecting rod 300. At the same time, it drives the return spring 31 to store energy, and the moving shaft 210 releases the limit on the latch 400 (opening lock released). Under the drive of the latch spring 401, the latch 400 rotates from the first position to the second position. The latch 400 then moves the moving shaft 210... When the traction rod 500 is restricted to the second position of the moving shaft and cannot move to the first position, the latch 400 simultaneously releases the limiting position on the roller 502, causing the traction rod 500 to rotate from the first position to the second position under the drive of the traction rod spring 501. This causes the roller 502 to restrict the latch 400 to the second position and prevent it from rotating to the first position. At this time, the circuit breaker closes. The closing and locking are achieved by the roller 502 on the traction rod 500, the latch 400, and the moving shaft 210 being sequentially limited, keeping the reset spring 31 in the energy storage state.

[0051] like Figure 4 As shown, when the traction rod 500 is driven by the opening driving force to overcome the force of the traction rod spring 501 and rotates from the second position to the first position, the traction rod 500 drives the roller 502 to release the limit on the latch 400 (closing lock release), thereby the return spring 31 releases energy to drive the moving contact 41 and the stationary contact 42 to separate. At the same time, the return spring 31 drives the moving shaft 210 from the second position to the first position, and the moving shaft 210 drives the latch 400 to overcome the force of the latch spring 401. The force rotates the latch from the second position to the first position, and restricts the latch 400 to the first position, preventing it from rotating to the second position. Then, the latch 400 restricts the traction rod 500 to the first position via the roller 502, preventing it from rotating to the second position. At this time, the circuit breaker trips. The tripping is achieved by the sequential limiting of the moving shaft 210, the latch 400, and the roller 502 on the traction rod 500, so that the traction rod spring 501 and the latch spring 401 are kept in the energy storage state.

[0052] In this embodiment of the magnetically controlled circuit breaker, the electromagnetic driving force of the electromagnetic system 200 drives the connecting rod 300 to move through the moving shaft 210, thereby causing the moving contact 41 to contact and separate from the stationary contact 42. The circuit breaker is stabilized in the closed state by the roller 502 on the traction rod 500, the latch 400 and the moving shaft 210 in the forward direction and in the open state by the reverse direction, thereby realizing the opening and closing of the magnetically controlled circuit breaker, reducing the number of parts, simplifying the structure of the operating mechanism 1 and improving the reliability of the movement.

[0053] It should be noted that the control system and electromagnetic system 200 are existing technologies. The electromagnetic system 200 typically includes a moving iron core 230, a stationary iron core 240, and a coil 250. The moving iron core 230 and the stationary iron core 240 are arranged opposite to each other, and the coil 250 is located within the space enclosed by the moving iron core 230 and the stationary iron core 240. When the control system sends a closing signal, the control coil 250 is energized, magnetizing the stationary iron core 240, causing the moving iron core 230 to move towards the stationary iron core 240 until it is attracted to the stationary iron core 240. The moving iron core 230 drives the moving shaft 210 from a first position to a second position.

[0054] Furthermore, in this embodiment, the electromagnetic system 200 operates momentarily; after closing, the coil 250 is de-energized, and the electromagnetic system 200 provides closing overtravel for the moving shaft 210. For example... Figure 3 As shown, during the circuit breaker closing process, the coil 250 of the electromagnetic system 200 is energized first, and the moving iron core 230 drives the moving shaft 210 from the first position to the second position. At this time, there is still a margin in the closing stroke. The moving iron core 230 drives the moving shaft 210 to continue moving to the third position. That is, the distance from the first position to the second position is the closing stroke of the moving shaft 210, and the distance from the second position to the third position is the closing stroke margin of the moving shaft 210. This closing stroke margin ensures that the latch 400 and the traction rod 500 can be reliably reset. After the latch spring 401 drives the latch 400 to reset to the second position and the traction rod spring 501 drives the traction rod 500 to reset to the second position, the coil 250 of the electromagnetic system 200 is de-energized again, causing the reset spring 31 to drive the moving shaft 210 from the third position to the second position. Since this embodiment also includes a contact spring 32, after the coil 250 of the electromagnetic system 200 is de-energized, the reset spring 31 and the contact spring 32 together drive the moving shaft 210 from the third position to the second position.

[0055] like Figure 3-4 As shown in Figure 7, the end of the latch 400 near the electromagnetic system 200 is rotatably mounted on the bracket 100, and the other end of the latch 400 away from the electromagnetic system 200 is provided with a first latch limiting surface 411 and a first latch mating surface 412 that respectively limit the movement shaft 210, and a second latch limiting surface 413 and a second latch mating surface 414 that respectively limit the roller 502.

[0056] like Figure 4 As shown, when the moving shaft 210 is in the first position, the latch 400 is limited to the first position by acting on the first latch mating surface 412, and the latch 400 acts on the roller 502 through the second latch limiting surface 413 to limit the traction rod 500 to the first position.

[0057] like Figure 3 As shown, when the traction rod 500 is in the second position, the roller 502 acts on the second locking mating surface 414 to limit the latch 400 to the second position, and the latch 400 acts on the moving shaft 210 through the first locking limiting surface 411 to limit the moving shaft 210 to the second position. The locking and moving shaft 210 and roller 502 limiting mating structure of the latch 400 is simple, reducing the requirements for manufacturing and assembly precision. Moreover, in this embodiment, the roller 502 of the traction rod 500 and the second locking limiting surface 413 and the second locking mating surface 414 of the latch 400 cooperate to achieve mechanical locking, eliminating the need for additional independent locking parts (such as separate jumpers, re-fasteners, etc.) between the latch 400 and the traction rod 500, simplifying the number of parts, greatly improving the complexity of the operating mechanism 1 structure and the high requirements for assembly precision, and significantly improving the reliability and stability of the product. Furthermore, since the rotation center of the latch 400 is located at the end of the latch 400 close to the electromagnetic system 200, and the limiting engagement structure between the latch 400 and the moving shaft 210 is located at the other end of the latch 400 away from the electromagnetic system 200, when the circuit breaker is closed, the moving shaft 210 moves towards the rotation center of the latch 400 until it engages with the first latch limiting surface 411. The latch 400 applies a positive pressure to the roller 502 on the traction rod 500. At this time, the operating mechanism 1 is in the closed locking state. When the traction rod 500 is driven by the opening driving force, the traction rod 500 overcomes the rolling friction force applied by the latch 400 and rotates counterclockwise until the circuit breaker is opened.

[0058] Furthermore, the first locking limiting surface 411, the first locking mating surface 412, the second locking limiting surface 413, and the second locking mating surface 414 are connected at an included angle in sequence. The locking 400, the movable shaft 210, and the roller 502 are connected by multiple planes at an included angle, which is very simple and easy to manufacture. Preferably, the included angle between the first locking limiting surface 411 and the first locking mating surface 412 is rounded, so that the movable shaft 210 can slide more smoothly between the first locking limiting surface 411 and the first locking mating surface 412; the included angle between the second locking limiting surface 413 and the second locking mating surface 414 is also rounded, so that the roller 502 can slide more smoothly between the second locking limiting surface 413 and the second locking mating surface 414.

[0059] like Figure 3 , 7 As shown in Figure -8, the latch 400 is provided with a first latch positioning part 470, and the bracket 100 is provided with a first bracket stop part 121. The first bracket stop part 121 and the first latch positioning part 470 are mutually limiting and cooperating to position the latch 400 in the second latch position; as shown in Figure -8. Figure 3As shown, when the locking spring 401 drives the locking latch 400 to rotate from the first locking position to the second locking position, the locking latch 400 causes the first locking latch positioning part 470 to stop at the first bracket stop part 121, thus positioning the locking latch 400 in the second locking position. The first bracket stop part 121 and the first locking latch positioning part 470 cooperate to limit and position the locking latch 400, making the closing lock more stable and reliable.

[0060] like Figure 6-8 As shown, the latch 400 has second latch positioning portions 480 protruding from both sides along the rotation center direction of the latch 400. The bracket 100 has two bracket limiting surfaces 111, which respectively engage with the second latch positioning portions 480 on both sides of the latch 400 to limit the latch 400 between the two bracket limiting surfaces 111 in the rotation center direction of the latch 400. The bracket limiting surfaces 111 engage with the second latch positioning portions 480 to position and limit the latch 400, preventing the latch 400 from shifting in the rotation center direction of the latch 400.

[0061] like Figure 3-4 As shown in Figure 8, the bracket 100 is provided with a guide hole 112. The movable shaft 210 is slidably inserted into the guide hole 112 along its length. The outer diameter of the movable shaft 210 is the same as the width of the guide hole 112 and smaller than the length of the guide hole 112. The guide hole 112 is preferably an oblong hole. The guide hole 112 on the bracket 100 serves to guide and limit the movement of the movable shaft 210. Because the movable shaft 210 is limited in the width direction of the guide hole 112 and will not deviate, the tripping lock is more stable and reliable.

[0062] like Figure 3 , 8 As shown in Figure -9, the traction rod 500 is provided with a traction rod positioning part, and the bracket 100 is provided with a second bracket stop part 131. The second bracket stop part 131 is in a limiting cooperation with the traction rod positioning part to position the traction rod 500 in a second position; as shown in Figure -9. Figure 3 As shown, when the traction rod spring 501 drives the traction rod 500 to rotate from the first position to the second position, the traction rod 500 causes the traction rod positioning part to stop at the second bracket stop 131, thus positioning the traction rod 500 at the second position. The second bracket stop 131 cooperates with the traction rod positioning part to limit and position the traction rod 500, making the closing lock more stable and reliable.

[0063] like Figure 2-4As shown in Figure 9, the magnetically controlled circuit breaker of this embodiment has multiple tripping modes. The magnetically controlled circuit breaker of this embodiment includes a trip unit 5 and / or a tripping button 6 and / or a short-circuit protection mechanism 7 and / or an overload protection mechanism 8, which are used to provide tripping driving force for the traction rod 500. The traction rod 500 is provided with a first triggering part that cooperates with the trip unit 5, and / or a second triggering part that cooperates with the tripping button 6, and / or a third triggering part that cooperates with the short-circuit protection mechanism 7, and / or a fourth triggering part that cooperates with the overload protection mechanism 8.

[0064] The trip unit 5 is existing technology and is typically a flux trip unit. For example... Figure 4 As shown, in this embodiment, the magnetically controlled circuit breaker achieves remote tripping via the trip unit 5. When the control system sends a tripping signal, it triggers the trip unit 5. The trip unit 5 acts on the first triggering part to provide a tripping driving force to the traction rod 500. That is, the push rod of the trip unit 5 drives the traction rod 500 to overcome the force of the traction rod spring 501 and rotate counterclockwise from the second position to the first position. The traction rod 500 drives the roller 502 to disengage from the second locking mating surface 414 to release the limit on the lock 400. Then, the lock 400 releases the limit on the moving shaft 210, and the closing lock is activated. The release of the return spring 31 causes the moving contact 41 and the stationary contact 42 to separate, thus opening the circuit breaker. Simultaneously, the return spring 31 drives the moving shaft 210, the latch 400, and the rollers 502 on the traction rod 500 to sequentially limit their positions, achieving opening and locking. After the trip unit 5 completes the opening signal, it automatically resets, meaning the top rod of the trip unit 5 separates from the first trigger part of the traction rod 500. Because the moving shaft 210, the latch 400, and the rollers 502 on the traction rod 500 are sequentially limited after the circuit breaker opens, the traction rod 500 can still overcome the force of the traction rod spring 501 and remain in the first position. In this embodiment, the trip unit 5 is mounted on the middle seat 22 of the housing 2 and is located on one side of the traction rod 500.

[0065] In this embodiment, the magnetically controlled circuit breaker is manually tripped via the trip button 6, which is typically used for testing. Figure 4 As shown, when the trip button 6 is manually operated, it provides a tripping driving force to the traction rod 500 when it acts on the second trigger. This drives the traction rod 500 to rotate counterclockwise from the second position to the first position, overcoming the force of the traction rod spring 501. The subsequent operation is the same as the remote tripping described above, and will not be repeated here. In this embodiment, the trip button 6 is linearly movable and mounted on the cover 23 of the housing 2, located above the second trigger.

[0066] The short-circuit protection mechanism 7 is existing technology, typically including a magnetic yoke 71, a rotatably mounted armature 72, and an armature spring 73 connecting the magnetic yoke 71 and the armature 72. In this embodiment, the magnetically controlled circuit breaker achieves short-circuit tripping protection through the short-circuit protection mechanism 7. Figure 4 As shown, when a short circuit fault occurs in the circuit breaker, the short circuit protection mechanism 7 provides a tripping driving force to the traction rod 500 when it acts on the third trigger. That is, the armature 72 of the short circuit protection mechanism 7 rotates clockwise against the force of the armature spring 73. The armature 72 drives the traction rod 500 to rotate counterclockwise from the second position to the first position of the traction rod by acting on the third trigger. The subsequent action process is the same as the remote tripping described above, and will not be repeated here. In this embodiment, the short circuit protection mechanism 7 is located below the traction rod 500. The conductive system also includes a conductive plate 45 connected in series between the moving contact 41 and the first connecting plate 43. The conductive plate 45 is fixedly installed on the base 21 of the housing 2. The magnetic yoke 71 is fixedly connected to the conductive plate 45, and the conductive plate 45 at least partially passes through the cavity formed by the magnetic yoke 71 and one end of the armature 72. The other end of the armature 72 extends upward to be spaced opposite to the third trigger.

[0067] The overload protection mechanism 8 is existing technology, typically a bimetallic strip connected in series between the moving contact 41 and the first connecting plate 43. When an overload fault occurs in the circuit breaker, the overload protection mechanism 8 acts on the fourth trigger to provide a tripping driving force to the traction rod 500. That is, the bimetallic strip bends due to heat, and the bimetallic strip drives the traction rod 500 to rotate from the second position to the first position of the traction rod by acting on the fourth trigger, overcoming the force of the traction rod spring 501. The subsequent action process is the same as the remote tripping described above, and will not be repeated here. In this embodiment, one end of the bimetallic strip is fixedly connected to the conductive plate 45, and the other end of the bimetallic strip extends upward to be spaced opposite to the fourth trigger.

[0068] The magnetically controlled circuit breaker in this embodiment is a three-phase circuit breaker, meaning it has a three-phase conductive system. Each phase of the conductive system is provided with a short-circuit protection mechanism 7 and an overload protection mechanism 8, resulting in a total of three short-circuit protection mechanisms 7 and three overload protection mechanisms 8. Correspondingly, the traction rod 500 has three third triggering parts for each of the three short-circuit protection mechanisms 7, and three fourth triggering parts for each of the three overload protection mechanisms 8.

[0069] like Figure 3-4As shown, the operating mechanism 1 is located above the moving contact 41 and the stationary contact 42 in the second direction. The moving shaft 210 is linearly movable along the first direction. The rotation centers of the latch 400, the traction rod 500, the roller 502, and the moving contact 41, as well as the axis of the moving shaft 210, are respectively arranged along a third direction and are parallel to each other and spaced apart. The axis of the moving shaft 210 and the rotation center of the roller 502 are located on one side of the line connecting the rotation centers of the latch 400 and the traction rod 500, and the rotation center of the moving contact 41 is located on the other side of the line connecting the rotation centers of the latch 400 and the traction rod 500. The first direction, the second direction, and the third direction are perpendicular to each other. The first direction is... Figure 2-4 The X direction is the length direction of the circuit breaker; the second direction is... Figure 2-4 The Y-direction is the height direction of the circuit breaker; the third direction is... Figure 2 In the Z-direction, Figure 3-4 The direction perpendicular to the drawing is also the width direction of the circuit breaker. The layout of the operating mechanism 1 and the moving contact 41 is more reasonable, and the transmission link 300 between the moving shaft 210 and the moving contact 41 can be designed in a straight shape, which facilitates a more direct torque transmission path.

[0070] Specifically, the electromagnetic system 200 is located on one side of the support 100 of the operating mechanism 1 in the first direction, and above the moving contact 41 and the stationary contact 42 in the second direction. The electromagnetic system 200 drives the moving shaft 210 through the pull rod 220, and the connecting rod 300 is connected between the moving shaft 210 and the rotating shaft 3. One end of the pull rod 220 and the connecting rod 300 are respectively hinged to the moving shaft 210, and the other end of the pull rod 220 is fixedly connected to the moving iron core 230 of the electromagnetic system 200. The other end of the connecting rod 300 and the rotating shaft 3 are respectively hinged to the transmission shaft 301. Preferably, the connecting rod 300 is similar to a straight structure. In this embodiment, the moving iron core 230, the moving shaft 210, and the pull rod 220 of the electromagnetic system 200 are arranged to move synchronously.

[0071] like Figure 5-6As shown in Figure 8, the bracket 100 of this embodiment includes two bracket side plates 110 arranged at intervals opposite to each other along a third direction, and a bracket top plate 120 connected between the upper sides of the two bracket side plates 110, that is, the two bracket side plates 110 and the bracket top plate 120 are connected in an inverted U-shape. The lower sides of the two bracket side plates 110 are respectively bent outward to provide bracket fixing feet 130. The bracket fixing feet 130 can be fixedly connected to the middle seat 22 of the outer shell 2 by means of screw connection or other means. The inner side surfaces of the two bracket side plates 110 serve as the two bracket limiting surfaces 111; the lower side surface of the bracket top plate 120 serves as the first bracket stop part 121; the bracket fixing foot 130 of one of the bracket side plates 110 is arranged opposite to the traction rod positioning part, and its side facing the traction rod positioning part serves as the second bracket stop part 131; the other bracket side plate 110 is bent inward to provide a bracket hook 140.

[0072] The two support side plates 110 are respectively provided with guide holes 112, and the two ends of the moving shaft 210 are respectively slidably inserted into the guide holes 112 of the two support side plates 110.

[0073] A locking rotating shaft 101 and a traction rod rotating shaft 102 are connected between the two bracket side plates 110, respectively for rotatably connecting with the locking buckle 400 and the traction rod 500. Each of the two bracket side plates 110 has a first mounting hole 113 that mates with the locking rotating shaft 101, with both ends of the locking rotating shaft 101 inserted into the first mounting holes 113 of the two bracket side plates 110; each of the two bracket side plates 110 also has a second mounting hole 114 that mates with the traction rod rotating shaft 102, with both ends of the traction rod rotating shaft 102 inserted into the second mounting holes 114 of the two bracket side plates 110.

[0074] like Figure 5-7As shown, in this embodiment, the latch 400 is located between the two support side plates 110 in the third direction, and includes at least one latch plate. Each latch plate includes a latch plate body 420, a latch limiting part 410 and a latch rotating part 430 respectively bent and connected to both ends of the latch plate body 420. The latch limiting part 410 is provided with a first latch limiting surface 411, a first latch mating surface 412, a second latch limiting surface 413 and a second latch mating surface 414. The latch rotating part 430 is rotatably mounted on the support 100, and the latch rotating part 430 is provided with a latch rotating hole 431 through which the latch 400 rotates. The lock rotation shaft 101 connected to the bracket 100 has the axis of the lock rotation hole 431 coinciding with the axis of the lock rotation shaft 101, serving as the rotation center of the lock 400; the lock rotation part 430 is provided with a lock stop surface 432 that is spaced apart from the first lock limiting surface 411; the lock plate body 420 has adjacent first lock side 421 and second lock side 422; the first lock limiting surface 411 and the lock stop surface 432 are respectively connected to the first lock side 421 at an angle to form a lock notch 440; the second lock mating surface 414 is connected to the second lock side 422 at an angle to form a lock notch 450.

[0075] Specifically, the latch 400 of this embodiment includes two latch plates that are spaced apart and opposite to each other along the rotation center direction (third direction) of the latch 400, and a latch connecting part 460 connected between the two latch plates. The latch connecting part 460 is U-shapedly connected to the latch plate body 420 of the two latch plates, and the side of the latch plate body 420 opposite to the latch connecting part 460 serves as the first latch side 421.

[0076] The two latch plates have protruding structures on their sides adjacent to the latch stop surface 432, which are located away from the latch plate body 420, serving as the first latch positioning part 470. The latch rotating parts 430 of the two latch plates also have protruding structures that serve as the second latch positioning part 480.

[0077] like Figure 6 As shown, the locking spring 401 in this embodiment is a torsion spring, comprising two torsion spring bodies. The locking spring 401 is located between the two support side plates 110 in the third direction. The two torsion spring bodies are respectively sleeved on the locking rotation shaft 101 and located on both sides of the locking spring 400 in the third direction. One end of each torsion spring body abuts against the support 100, and the other ends of the two torsion spring bodies are integrally connected to form a U-shaped structure. The two sides of this U-shaped structure rest on the second locking positioning portions 480 on both sides of the locking spring 400. Of course, the locking spring 401 can be a single-torsion spring structure, or it can be a tension spring, compression spring, etc.

[0078] like Figure 5-6 As shown in Figure 9, the traction rod 500 of this embodiment includes a traction rod body 510, which is a long rod structure arranged along a third direction in the length direction. A traction rod rotating part 520 is provided on the upper side of the middle part of the traction rod body 510, and the traction rod rotating part 520 is provided with a traction rod rotating hole 521. The traction rod rotating part 520 is located between two support side plates 110. The traction rod 500 is rotatably connected to the traction rod rotating shaft 102 on the support 100 through the traction rod rotating hole 521. The axis of the traction rod rotating hole 521 coincides with the axis of the traction rod rotating shaft 102, serving as the rotation center of the traction rod 500. A traction rod hook 580 is provided on the side of the traction rod rotating part 520.

[0079] The traction rod rotating part 520 is provided with two traction rod mounting parts 530 that are respectively raised upward and spaced apart in a third direction. A roller rotating shaft 503 is connected between the two traction rod mounting parts 530. The roller 502 is provided with a roller rotating hole. The roller 502 is rotatably connected to the roller rotating shaft 503 through the roller rotating hole. The axis of the roller rotating hole and the axis of the roller rotating shaft 503 are coincident and set as the rotation center of the roller 502.

[0080] One end of the traction rod body 510 has an upwardly protruding first traction rod protrusion 540 and a side-protruding first traction rod platform 550. The other end of the traction rod body 510 has a side-protruding second traction rod platform 560. The first traction rod protrusion 540, the first traction rod platform 550, and the second traction rod platform 560 serve as the first trigger part, the second trigger part, and the traction rod positioning part, respectively. The lower side of the traction rod body 510 has three second traction rod protrusions 570. The second traction rod protrusions 570 serve as the third trigger part and the fourth trigger part. That is, the short-circuit protection mechanism 7 and the overload protection mechanism 8 of the corresponding phase act on the same second traction rod protrusion 570 to provide the tripping driving force for the traction rod 500, thus simplifying the structure of the traction rod 500.

[0081] like Figure 3-5 As shown, the traction rod spring 501 in this embodiment is an inclined tension spring, with one end hanging on the bracket hook 140 and the other end hanging on the traction rod hook 580. Of course, the traction rod spring 501 can also be a torsion spring, compression spring, etc.

[0082] The magnetically controlled circuit breaker in this embodiment has automatic closing driven by the electromagnetic system 200, remote opening driven by the trip unit 5, manual opening driven by the opening button 6, short-circuit opening protection driven by the short-circuit protection mechanism 7, and overload opening protection driven by the overload protection mechanism 8.

[0083] The automatic closing process of the magnetically controlled circuit breaker in this embodiment is as follows: Figure 3 As shown, when the control system sends a closing signal, the control electromagnetic system 200 coil 250 is energized, magnetizing the stationary iron core 240, causing the moving iron core 230 to move to the right until it engages with the stationary iron core 240. The moving iron core 230 drives the moving shaft 210 to move from the first position to the second position along the length direction of the guide hole 112 via the pull rod 220 (that is, the moving shaft 210 slides along the first locking mating surface 412 into the locking recess 440). The moving shaft 210 drives the rotating shaft 3 to rotate clockwise against the force of the return spring 31 via the connecting rod 300 (that is, the rotating shaft 3 drives the return spring 31 to store energy). The rotating shaft 3 drives the moving contact 41 to rotate clockwise and contact the stationary contact 42, thereby realizing the closing of the circuit breaker.

[0084] Because there is a margin in the closing stroke, the moving iron core 230 drives the moving shaft 210 to continue moving to the right to the third position of the moving shaft via the pull rod 220, making room for the rotation of the latch 400; at the same time, because the moving shaft 210 disengages from the first latch mating surface 412 to release the limit on the latch 400 (opening lock released), the latch 400, driven by the latch spring 401, rotates clockwise around the latch rotation shaft 101 from the first latch position until the first latch positioning part 470 stops at the first bracket stop part 121, positioning the latch 400 in the second latch position; simultaneously, because the latch 400 releases the roller 50 The limit of position 2 causes the traction rod 500 to rotate clockwise around the traction rod rotation axis 102 from the first position of the traction rod under the drive of the traction rod spring 501 until the traction rod 500 drives the second traction rod platform 560 to stop at the second bracket stop 131, thus positioning the traction rod 500 at the second position of the traction rod; at the same time, the traction rod 500 drives the roller 502 to slide from the second locking limit surface 413 into the locking notch 450 and abut against the second locking mating surface 414, so that the roller 502, by acting on the second locking mating surface 414, limits the lock 400 to the second locking position and prevents it from rotating to the first locking position;

[0085] Then, the coil 250 of the electromagnetic system 200 is de-energized, and the reset spring 31 and the contact spring 32 jointly drive the moving shaft 210 to move from the third position to the left along the length direction of the guide hole 112 to the second position of the moving shaft. That is, the moving shaft 210 is blocked by the first locking limit surface 411 and cannot continue to move to the first position of the moving shaft. At this time, the circuit breaker closes, and the closing lock is achieved by the roller 502 on the traction rod 500, the lock 400 and the moving shaft 210 being limited in sequence, so that the reset spring 31 is kept in the energy storage state.

[0086] The tripping process of the magnetically controlled circuit breaker in this embodiment is as follows: Figure 4As shown, when the traction rod 500 is driven by the tripping driving force and overcomes the force of the traction rod spring 501, it rotates counterclockwise around the traction rod rotation shaft 102 from the second position to the first position. The traction rod 500 then drives the roller 502 to disengage from the second locking mating surface 414 to release the limit on the locking latch 400 (closing lock release). This releases the energy of the return spring 31, driving the rotating shaft 3 to rotate counterclockwise. The rotating shaft 3 then drives the moving contact 41 to rotate counterclockwise and separate from the stationary contact 42, thus tripping the circuit breaker. Simultaneously, the return spring 31 drives the moving shaft 210 along the length of the guide hole 112 from the second position to the left, moving it to the first position (i.e., the moving shaft 210 slides along the first locking limiting surface 411) via the rotating shaft 3 and connecting rod 300. The first latch mating surface 412) and the moving shaft 210 drive the latch 400 to overcome the force of the latch spring 401 and rotate counterclockwise around the latch rotation shaft 101 from the second latch position to the first latch position. This causes the moving shaft 210 to limit the latch 400 to the first latch position by acting on the first latch mating surface 412, preventing it from rotating to the second latch position. Then, the latch 400, through the second latch limiting surface 413, acts on the roller 502 to limit the traction rod 500 to the first traction rod position, preventing it from rotating to the second traction rod position. At this time, the circuit breaker trips. The tripping and locking are achieved by the sequential limiting of the moving shaft 210, the latch 400, and the roller 502 on the traction rod 500, so that the traction rod spring 501 and the latch spring 401 are kept in the energy storage state.

[0087] It should be noted that in the description of this utility model, the terms "upper," "lower," "left," "right," "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 during use. They are only for ease of description and do not indicate that the device or component referred to must have a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating relative importance.

[0088] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of the present invention, and all such modifications and substitutions should be considered within the protection scope of the present invention.

Claims

1. A magnetically controlled circuit breaker, comprising an operating mechanism (1) and an electromagnetic system (200), characterized in that: The operating mechanism (1) includes a return spring (31), a bracket (100), a moving shaft (210) driven by an electromagnetic system (200) and linearly mounted on the bracket (100), a connecting rod (300) connected to the moving shaft (210) and used to drive the moving contact (41), a latch (400) and a traction rod (500) respectively rotatably mounted on the bracket (100), a latch spring (401) and a traction rod spring (501) respectively connected to the latch (400) and the traction rod (500), the moving shaft (210) being limited to the latch (400), and the traction rod (500) being provided with a roller (502), the roller (502) being rotatably mounted and being limited to the latch (400); When the electromagnetic system (200) is energized, it drives the moving shaft (210) to move from the first position to the second position. The moving shaft (210) drives the moving contact (41) and the stationary contact (42) to contact through the connecting rod (300). At the same time, it drives the return spring (31) to store energy. The moving shaft (210) releases the limit on the latch (400), causing the latch (400) to rotate from the first position to the second position under the drive of the latch spring (401). The latch (400) limits the moving shaft (210) to the second position and prevents it from moving to the first position. At the same time, the latch (400) releases the limit on the roller (502), causing the traction rod (500) to rotate from the first position to the second position under the drive of the traction rod spring (501). The roller (502) limits the latch (400) to the second position and prevents it from rotating to the first position. When the traction rod (500) is driven by the tripping driving force to overcome the force of the traction rod spring (501) and rotates from the second position to the first position, the traction rod (500) drives the roller (502) to release the limit on the latch (400), thereby the return spring (31) releases energy and drives the moving contact (41) and the stationary contact (42) to separate. At the same time, the return spring (31) drives the moving shaft (210) to move from the second position to the first position. The moving shaft (210) drives the latch (400) to overcome the force of the latch spring (401) and rotate from the second position to the first position, and limits the latch (400) to the first position and prevents it from rotating to the second position. Then, the latch (400) limits the traction rod (500) to the first position through the roller (502) and prevents it from rotating to the second position.

2. The magnetically controlled circuit breaker according to claim 1, characterized in that: During the circuit breaker closing process, the electromagnetic system (200) is energized first, driving the moving shaft (210) from the first position to the second position, and then to the third position. When the electromagnetic system (200) loses power again, the return spring (31) drives the moving shaft (210) from the third position to the second position.

3. The magnetically controlled circuit breaker according to claim 1, characterized in that: The latch (400) is rotatably mounted on the bracket (100) at one end near the electromagnetic system (200), and the latch (400) away from the electromagnetic system (200) is provided with a first latch limiting surface (411) and a first latch mating surface (412) respectively limited to the moving shaft (210), and a second latch limiting surface (413) and a second latch mating surface (414) respectively limited to the roller (502); When the moving shaft (210) is in the first position, the latch (400) is limited to the first position by acting on the first latch mating surface (412), and the latch (400) is limited to the first position by acting on the roller (502) through the second latch limiting surface (413). When the traction rod (500) is in the second position, the roller (502) acts on the second locking mating surface (414) to limit the lock (400) in the second position, so that the lock (400) acts on the moving shaft (210) through the first locking limiting surface (411) to limit the moving shaft (210) in the second position.

4. The magnetically controlled circuit breaker according to claim 3, characterized in that: The first locking limiting surface (411), the first locking mating surface (412), the second locking limiting surface (413), and the second locking mating surface (414) are connected at an included angle in sequence.

5. The magnetically controlled circuit breaker according to claim 3, characterized in that: The latch (400) includes at least one latch plate. Each latch plate includes a latch plate body (420), a latch limiting part (410) bent and connected to both ends of the latch plate body (420), and a latch rotating part (430). The latch limiting part (410) is provided with a first latch limiting surface (411), a first latch mating surface (412), a second latch limiting surface (413), and a second latch mating surface (414). The latch rotating part (430) is rotatably mounted on the bracket (100). The rotating part (430) is provided with a locking stop surface (432) that is spaced apart from the first locking limiting surface (411). The locking plate body (420) has an adjacent first locking side (421) and a second locking side (422). The first locking limiting surface (411) and the locking stop surface (432) are respectively connected to the first locking side (421) at an angle to form a locking notch (440). The second locking mating surface (414) is connected to the second locking side (422) at an angle to form a locking notch (450).

6. The magnetically controlled circuit breaker according to claim 5, characterized in that: The latch (400) includes two latch plates that are spaced apart and opposite to each other along the rotation center direction of the latch (400), and a latch connecting part (460) connected between the two latch plates. The latch connecting part (460) is U-shapedly connected to the latch plate body (420) of the two latch plates. The side of the latch plate body (420) opposite to the latch connecting part (460) serves as the first latch side (421).

7. The magnetically controlled circuit breaker according to claim 1, characterized in that: The latch (400) is provided with a first latch positioning part (470), and the bracket (100) is provided with a first bracket stop part (121). The first bracket stop part (121) and the first latch positioning part (470) are mutually limiting and cooperating to position the latch (400) in the second latch position. And / or, the two sides of the latch (400) are respectively provided with second latch positioning parts (480) protruding along the rotation center direction of the latch (400), and the bracket (100) is provided with two bracket limiting surfaces (111). The two bracket limiting surfaces (111) are respectively limited and cooperated with the second latch positioning parts (480) on both sides of the latch (400) to limit the latch (400) between the two bracket limiting surfaces (111) in the rotation center direction of the latch (400).

8. The magnetically controlled circuit breaker according to claim 1, characterized in that: The traction rod (500) is provided with a traction rod positioning part, and the bracket (100) is provided with a second bracket stop part (131). The second bracket stop part (131) cooperates with the traction rod positioning part to limit and position the traction rod (500) at the second position of the traction rod.

9. The magnetically controlled circuit breaker according to claim 1, characterized in that: The magnetic circuit breaker includes a trip unit (5), and the traction rod (500) is provided with a first trigger part that cooperates with the trip unit (5). When the trip unit (5) acts on the first trigger part, it provides a tripping driving force for the traction rod (500). And / or, the magnetically controlled circuit breaker includes a trip button (6), and the traction rod (500) is provided with a second trigger part that cooperates with the trip button (6). When the trip button (6) acts on the second trigger part, it provides a tripping driving force to the traction rod (500). And / or, the magnetically controlled circuit breaker includes a short-circuit protection mechanism (7), and the traction rod (500) is provided with a third trigger part that cooperates with the short-circuit protection mechanism (7). When the short-circuit protection mechanism (7) acts on the third trigger part, it provides a tripping driving force for the traction rod (500). And / or, the magnetically controlled circuit breaker includes an overload protection mechanism (8), and the traction rod (500) is provided with a fourth trigger part that cooperates with the overload protection mechanism (8). When the overload protection mechanism (8) acts on the fourth trigger part, it provides a tripping driving force to the traction rod (500).

10. The magnetically controlled circuit breaker according to claim 1, characterized in that: The bracket (100) is provided with a guide hole (112). The movable shaft (210) is slidably inserted into the guide hole (112) along the length direction of the guide hole (112). The outer diameter of the movable shaft (210) is the same as the width of the guide hole (112) and smaller than the length of the guide hole (112).

11. The magnetically controlled circuit breaker according to claim 1, characterized in that: The operating mechanism (1) is located above the moving contact (41) and the stationary contact (42) in the second direction. The moving shaft (210) is arranged to move linearly in the first direction. The rotation centers of the latch (400), the traction rod (500), the roller (502), and the moving contact (41), as well as the axis of the moving shaft (210), are respectively arranged in the third direction and are parallel to each other. The axis of the moving shaft (210) and the rotation center of the roller (502) are located on one side of the line connecting the rotation centers of the latch (400) and the traction rod (500), and the rotation center of the moving contact (41) is located on the other side of the line connecting the rotation centers of the latch (400) and the traction rod (500). The first direction, the second direction, and the third direction are perpendicular to each other.

12. The magnetically controlled circuit breaker according to claim 11, characterized in that: The electromagnetic system (200) is located on one side of the support (100) of the operating mechanism (1) in the first direction and above the moving contact (41) and the stationary contact (42) in the second direction. The electromagnetic system (200) drives the moving shaft (210) through the pull rod (220). The moving contact (41) is set on the rotating shaft (3). The connecting rod (300) is connected between the moving shaft (210) and the rotating shaft (3). One end of the pull rod (220) and the connecting rod (300) are respectively hinged to the moving shaft (210). The other end of the pull rod (220) is fixedly connected to the moving iron core (230) of the electromagnetic system (200). The other end of the connecting rod (300) and the rotating shaft (3) are respectively hinged to the transmission shaft (301).

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