CN216213216U - Action subassembly and circuit breaker - Google Patents

Abstract

The application provides an action subassembly and circuit breaker relates to low-voltage apparatus technical field, through the mode of electro-magnet direct drive button motion, does not additionally set up middle driving medium between electro-magnet and button promptly, so, can effectively improve transmission efficiency and closing speed, reduce electrical wear, improve the electric life-span of circuit breaker. In addition, can also include the permanent magnet, the permanent magnet can be located the electro-magnet, and the magnetic field direction of permanent magnet and electro-magnet is the same to make the magnetic field stack of permanent magnet and electro-magnet, and then the increase is to the drive power of button, improvement closing speed that one then can be further, and two then, the joining of permanent magnet can provide sufficient effort to circuit breaker mechanism when crossing the overtravel, thereby makes the circuit breaker have sufficient overrun, ensures the reliability of sound contact.

Description

Action subassembly and circuit breaker

Technical Field

The application relates to the technical field of low-voltage apparatuses, in particular to an action assembly and a circuit breaker.

Background

With the rapid development of economy, the living standard of people is rapidly improved, and the safety of household electricity utilization is required to be higher. The circuit breaker may be installed in a terminal distribution line. Meanwhile, the circuit can be connected, carried and disconnected under the condition of normal or abnormal circuit, and the circuit and the electrical equipment are effectively protected.

The existing circuit breaker is usually provided with a motor, a gear set and an action assembly, when electric switching-on is realized, the action assembly is driven to switch on through the motor driving gear set, but the circuit breaker is limited by more parts required by the motor switching-on, so that the switching-on speed is slower and is usually more than 0.5 second, the electrical loss of the circuit breaker is larger, and the service life is shorter.

SUMMERY OF THE UTILITY MODEL

An object of this application lies in, to not enough among the above-mentioned prior art, provides an action subassembly and circuit breaker to improve current circuit breaker and lead to the shorter problem of life when realizing electronic combined floodgate function.

In order to achieve the above purpose, the technical solutions adopted in the embodiments of the present application are as follows:

an aspect of the embodiment of the application provides an action subassembly, including setting up button, permanent magnet and the electro-magnet in the circuit breaker casing, electro-magnet and button drive cooperation, the permanent magnet sets up on the electro-magnet, and the magnetic field direction of permanent magnet and electro-magnet is the same, and the electro-magnet is used for the direct drive button to move towards the combined floodgate direction.

Optionally, the electromagnet comprises a coil assembly, a movable iron core and a static iron core which are arranged in the coil assembly, the movable iron core is matched with the button in a driving mode, and the permanent magnet is arranged on the movable iron core or the static iron core so that when the coil assembly is electrified, the movable iron core drives the button to move towards the closing direction.

Optionally, the coil assembly comprises a framework and a coil, the coil is wound on the periphery of the framework, through holes are formed in the framework, and the movable iron core, the static iron core and the permanent magnet are all located in the through holes.

Optionally, the electromagnet further includes an elastic member, and the elastic member is connected to the movable iron core and configured to provide a reset force to the movable iron core.

Optionally, the movable iron core has a driving part, the button has a driven part, when the coil assembly is powered on, the driving part drives the driven part so that the button is in a switching-on position, and when the coil assembly is powered off, under the action of a reset force, the driving part is separated from the driven part.

Optionally, the electromagnet further comprises a magnetic yoke, the coil assembly is arranged on the magnetic yoke, and a limiting portion is arranged on the movable iron core, so that the movable iron core is reset and then is abutted with the magnetic yoke in a matched mode through the limiting portion.

Optionally, the end of the movable iron core close to the stationary iron core is provided with a protrusion, and the end of the stationary iron core close to the movable iron core is provided with a groove matched with the protrusion.

Optionally, a clamping portion is further arranged on a groove wall of the groove, and the permanent magnet is located in the groove and is in matched clamping connection with the clamping portion.

Optionally, one end of the static iron core, which is far away from the movable iron core, is further provided with a positioning portion, and the static iron core is clamped with the breaker shell through the positioning portion.

In another aspect of the embodiments of the present application, a circuit breaker is provided, which includes a circuit breaker housing and any one of the above-mentioned actuating assemblies, where the actuating assembly is located in the circuit breaker housing.

The beneficial effect of this application includes:

the application provides an action subassembly and circuit breaker, through the mode of electro-magnet direct drive button motion, do not additionally set up intermediate transfer spare promptly between electro-magnet and button, so, can effectively improve transmission efficiency and closing speed, reduce electrical wear, improve the electric life-span of circuit breaker. In addition, can also include the permanent magnet, the permanent magnet can be located the electro-magnet, and the magnetic field direction of permanent magnet and electro-magnet is the same to make the magnetic field stack of permanent magnet and electro-magnet, and then the increase is to the drive power of button, improvement closing speed that one then can be further, and two then, the joining of permanent magnet can provide sufficient effort to circuit breaker mechanism when crossing the overtravel, thereby makes the circuit breaker have sufficient overrun, ensures the reliability of sound contact.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained from the drawings without inventive effort.

Fig. 1 is a schematic structural diagram of an actuating assembly according to an embodiment of the present disclosure;

FIG. 2 is an exploded view of an actuator assembly according to an embodiment of the present application;

FIG. 3 is a schematic diagram illustrating an actuation assembly in an open position according to an embodiment of the present disclosure;

FIG. 4 is a schematic diagram illustrating an action assembly in a closed position according to an embodiment of the present disclosure;

fig. 5 is a second schematic view illustrating a state of the actuating assembly in a closing position according to an embodiment of the present application;

fig. 6 is an assembly schematic diagram of a movable contact support and a movable contact according to an embodiment of the present application.

Icon: 120-a button; 121-hooks of buttons; 122-a driven part; 140-a catch member; 141-hooks of the locking mechanism; 150-a connecting rod; 160-a release fastener; 170-moving contact support; 171-a first centre of rotation; 172-first position of the movable contact support; 173-second position of the movable contact support; 180-moving contact; 181-first position of the movable contact; 182-a second position of the movable contact; 183-silver point of moving contact; 260-silver point of static contact; 270-opening electromagnet; 280-a reset spring; 290-instantaneous release; 300-an electromagnet; 301-a magnetic yoke; 302-a via hole; 304-a skeleton; 305-a coil; 306-a via; 307-an elastic member; 308-a permanent magnet; 310-a plunger; 311-ring frame; 312-a limiting part; 313-a protrusion; 314-blind hole; 315-a drive section; 350-static iron core; 351-grooves; 352-a clamping part; 353-a positioning part; 370-tension spring.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. It should be noted that, in case of conflict, various features of the embodiments of the present application may be combined with each other, and the combined embodiments are still within the scope of the present application.

In the description of the present application, it should be noted that the terms "vertical", "horizontal", "inside", "outside", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, and thus, should not be construed as limiting the present application. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

In the description of the present application, it is further noted that, unless expressly stated or limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

In an aspect of the embodiment of the present application, an action assembly is provided, as shown in fig. 1, including a button 120, a permanent magnet 308 and an electromagnet 300 which are disposed in a casing of a circuit breaker, where the button 120 may be in driving connection with a switching-on/off mechanism disposed in the casing of the circuit breaker, and therefore, when the button 120 moves toward a switching-on direction, the switching-on/off mechanism may be driven to switch on, so as to implement a switching-on function of the circuit breaker. In order to improve the intelligence of the circuit breaker, the electromagnet 300 is further arranged in the circuit breaker shell, the integrity of the circuit breaker can be improved, and meanwhile, the circuit breaker shell can be used for protecting and isolating the electromagnet 300. When the circuit breaker needs to be closed, the electromagnet 300 is powered to directly drive the button 120 to move in the closing direction, so that the circuit breaker can be closed. The mode that electro-magnet 300 direct drive button 120 moved, do not additionally set up intermediate transfer spare between electro-magnet 300 and button 120 promptly, so, can effectively improve transmission efficiency and closing speed, for example can improve to about fifty milliseconds, can effectively reduce electrical wear, improve the electric life-span of circuit breaker.

In addition, the permanent magnet 308 can be further included, the permanent magnet 308 can be located on the electromagnet 300, and the directions of the magnetic fields of the permanent magnet 308 and the electromagnet 300 are the same, so that the magnetic fields of the permanent magnet 308 and the electromagnet 300 are superposed, further the driving force for the button 120 is increased, the closing speed can be further increased on one hand, and on the other hand, sufficient acting force can be provided for the breaker mechanism when the breaker mechanism exceeds the overtravel, so that the breaker has sufficient overtravel, and the contact reliability of the moving contact and the static contact is ensured.

It should be noted that, as shown in fig. 1 and fig. 6, the switching mechanism includes a latch mechanism, a connecting rod 150, a movable contact support 170, a movable contact 180, a fixed contact and a tension spring 370, wherein the button 120 is rotatably connected to one end of the connecting rod 150, the other end of the connecting rod 150 is rotatably connected to a first position 172 of the movable contact support, the movable contact support 170 is rotatably disposed on the circuit breaker housing through a first rotation center 171, the movable contact 180 is rotatably disposed on a second position 173 of the movable contact support, one end of the tension spring 370 is fixed to the circuit breaker housing, the other end of the tension spring is fixed to the movable contact 180, and the tension spring 370 is connected to the first position 181 of the movable contact, the first position 181 of the movable contact and a silver point 183 of the movable contact are respectively located on two sides of the second position 173 of the movable contact support, so that one end of the movable contact 180 close to the first rotation center 171 is abutted to the second position 182 of the movable contact support 170 under an acting force of the tension spring 370, so that the movable contact 180 and the movable contact support 170 form a whole. As shown in fig. 1, the state is an open position, when the electromagnet 300 is used to implement closing, the electromagnet 300 pulls the button 120 to move rightward, the button 120 pushes the movable contact support 170 through the connecting rod 150, so that the whole body formed by the movable contact support 170 and the movable contact 180 rotates clockwise about the first rotation center 171, in this process, the tension spring 370 continuously stores energy, and the acting force applied by the tension spring 370 to the whole mechanism is such that the mechanism moves toward the open direction; when the silver point 183 of the moving contact contacts with the silver point 260 of the fixed contact, at this time, the mechanism enters an over-travel stage, the button 120 continues to move rightwards under the driving of the electromagnet 300, one end of the moving contact 180 close to the first rotating center 171 is separated from the moving contact support 170, the tension spring 370 continuously stores energy, when the button 120 and the latch mechanism are locked (for example, the hook 121 located at the button and the hook 141 located at the latch mechanism are hooked and locked in fig. 1), the over-travel is finished, the whole mechanism keeps a closing state, and at this time, the tension spring 370 applies an acting force to the moving contact 180 so that the moving contact 180 compresses the fixed contact. Because the effort of extension spring 370 is great when the back end overtravel, consequently, needs electro-magnet 300 can have great drive power, this application adds permanent magnet 308 to guarantee that the circuit breaker has sufficient overtravel.

In some embodiments, as shown in fig. 1, when the electromagnet 300 is a closing electromagnet 300, a breaking electromagnet 270 and an instantaneous release 290 are further provided, the latching mechanism includes a reset spring 280, a latching member 140 and a releasing member 160, the latching member and the releasing member 160 are respectively rotatably provided on the circuit breaker housing, and one end of the latching member is provided with a hook 141 of the latching mechanism. When a circuit connected with the breaker is short-circuited, the instantaneous release 290 acts to push the locking piece 140 to rotate anticlockwise, so that the hook 141 of the locking mechanism is separated from the hook 121 of the button, and the moving contact 180 completes opening; when normal brake opening is needed, the tripping piece 160 is driven to rotate by the brake opening electromagnet 270, the reset spring 280 stores energy, the locking piece 140 is driven to rotate anticlockwise by the tripping piece 160, the hook 141 of the locking mechanism is separated from the hook 121 of the button, the moving contact 180 completes brake opening, after brake opening is completed, the brake opening electromagnet 270 is powered off, and the reset spring 280 releases energy to push the tripping piece 160 to reset to prepare for next brake opening.

Optionally, as shown in fig. 2, the electromagnet 300 includes a coil assembly, and a movable iron core 310 and a stationary iron core 350 disposed in the coil assembly, and as shown in fig. 3, the movable iron core 310 is in driving fit with the button 120, and the permanent magnet 308 is disposed in the stationary iron core 350, so that when the button 120 needs to be driven by the electromagnet 300 to move, the coil assembly can be powered on, at this time, the coil assembly will generate a magnetic field to make the movable iron core 310 and the stationary iron core 350 have an attractive force with each other, and under the action of the attractive force, the movable iron core 310 moves towards the stationary iron core 350, and then the button 120 is driven to move towards the closing direction, because the permanent magnet 308 is disposed on the stationary iron core 350, during the front-stage movement of the movable iron core 310, the acting force exerted on the movable iron core 310 by the permanent magnet 308 is weaker, during this process, the movement process from the opening position to the over-travel position of the mechanism can be matched, and when the movable iron core 310 is closer to the stationary iron core 350, the force applied to the plunger 310 by the permanent magnet 308 is relatively large, and therefore, the subsequent movement of the plunger 310 can be matched to the movement of the mechanism from the over-travel position to the on-position. In some embodiments, the permanent magnet 308 may also be disposed on the movable core 310, which functions in a similar manner as that described above for the stationary core 350, and therefore, will not be described herein again.

Optionally, as shown in fig. 2, the coil assembly includes a framework 304 and a coil 305, where the coil 305 is wound around the framework 304, a through hole 306 is provided on the framework 304, the movable iron core 310, the stationary iron core 350 and the permanent magnet 308 are all located in the through hole 306, the arrangement of the through hole 306 can facilitate the assembly of the movable iron core 310, the stationary iron core 350 and the permanent magnet 308, and meanwhile, the extending direction of the through hole 306 can be consistent with the moving direction of the movable iron core 310, so that the inner wall of the through hole 306 provides a guiding effect for the movement of the movable iron core 310, that is, the movable iron core 310 is matched with the through hole 306 in shape.

Optionally, as shown in fig. 2, the electromagnet 300 further includes an elastic member 307, the elastic member 307 is connected to the movable iron core 310 and configured to provide a resetting force to the movable iron core 310, one end of the elastic member 307 abuts against the movable iron core 310, and the other end of the elastic member 307 abuts against the permanent magnet 308 or the stationary iron core 350 or the framework 304, when a switch-on is required, the coil 305 is energized, the movable iron core 310 moves away from the initial position toward a direction close to the stationary iron core 350, in this process, the elastic member 307 is compressed to store energy, and when the movable iron core 310 needs to be reset so as to facilitate a next switch-on, the coil 305 is de-energized, at this time, the elastic member 307 overcomes the acting force of the permanent magnet 308 and releases the energy, so that the movable iron core 310 returns to the initial position away from the stationary iron core 350. As shown in fig. 2, in order to improve the stability of the operation, a blind hole 314 may be further disposed at an end of the movable iron core 310 close to the stationary iron core 350, and a portion of the elastic member 307 may be received in the blind hole 314.

Optionally, because the electromagnet 300 generally cannot be continuously energized for a long time, otherwise, damage is easily caused, therefore, the driving matching manner of the movable iron core 310 and the button 120 may be unidirectional driving, that is, when the electromagnet 300 is a closing electromagnet 300, in the closing process, the electromagnet 300 is energized, closing is completed by driving the button 120 by the movable iron core 310, after closing is in place (the whole mechanism is in the closing state), the electromagnet 300 may be powered off, at this time, the part of the movable iron core 310 driving the button 120 is separated from the button 120 and reset, meanwhile, misdriving of the button 120 in the closing position due to resetting of the movable iron core 310 is avoided, and interference of movement of the button 120 in the opening process is also avoided.

In some embodiments, as shown in fig. 2, the plunger 310 has a driving portion 315, the button 120 has a driven portion 122, the driving portion 315 is located at one end of the plunger 310 close to the driven portion 122 of the button 120, when the coil 305 is energized, the driving portion 315 drives only the driven portion 122 to move in one direction, so that the button 120 is only switched on, and when the coil 305 is de-energized, the driving portion 315 can be separated from the driven portion 122 by the reset force. For example, as shown in fig. 2, an annular frame 311 is disposed at one end of the plunger 310, the driving portion 315 is a side rod of the annular frame 311 away from the plunger 310, a protruding portion is disposed on the driven portion 122 of the button 120, the protruding portion is located in the annular frame 311 and is in driving fit with the side rod, and a distance between two opposite inner wall surfaces of the annular frame 311 located on a moving path of the plunger 310 is greater than a displacement required during closing of the button 120, so that an erroneous driving of the button 120 that is already in the closing position is not caused during resetting of the plunger 310, which will be described in detail below with reference to fig. 3 to 5: as shown in fig. 3, when the button 120 is in the open position, the plunger 310 is in the initial position after reset, after the coil 305 is energized, the plunger 310 moves to the right, and the side lever of the ring frame 311 pulls the driven part 122 to move the button 120 to the right together, until as shown in fig. 4, when the button 120 is in the close position to de-energize the coil 305, as shown in fig. 5, the plunger 310 returns to the initial position under the release of the elastic member 307, during which the side lever of the driving protrusion in the ring frame 311 separates from the protrusion, and the plunger 310 returns to the initial position. In some embodiments, a hook may be further disposed on the plunger 310, and the driving portion 315 is a side rod of the hook that drives the driven portion 122.

Optionally, as shown in fig. 2, the electromagnet 300 further includes a magnetic yoke 301, the coil 305 assembly is disposed on the magnetic yoke 301, and a limiting portion 312 is disposed on the movable iron core 310, so that after the movable iron core 310 is reset, the movable iron core 310 is prevented from being separated from the electromagnet 300 by the limit portion 312 and the magnetic yoke 301 being in fit abutment. As shown in fig. 2, the frame 304 may be a rectangular structure, the movable iron core 310, the permanent magnet 308, and the static iron core 350 are all located in the through hole 306 of the frame 304, and the shapes of the movable iron core 310, the permanent magnet 308, and the static iron core 350 are all matched with the shape of the through hole 306, the magnetic yoke 301 may be a square frame, a through hole 302 is respectively disposed on two opposite side walls of the square frame, the frame 304, which is equipped with the movable iron core 310, the permanent magnet 308, the static iron core 350, and the elastic member 307 and is peripherally wrapped with the coil 305, is assembled in the square frame, the square frame is fixed on the circuit breaker housing, the movable iron core 310 is matched with the through hole 302 on one side of the square frame, so as to facilitate the movement of the movable iron core 310, the static iron core 350 is matched with the through hole 302 on the other side of the square frame, such that the positioning portion 353 on one end of the static iron core 350, which is away from the movable iron core 310, extends through the hole 302, and is clamped with the circuit breaker housing to form a lock along the movement direction of the movable iron core 310, as shown in fig. 2, when positioning, the stationary core 350 may abut against the inner wall of the yoke 301, and the positioning portion 353 may abut against the circuit breaker housing outside the yoke 301, so that the stationary core 350 is locked in the movement direction of the movable core 310.

Optionally, as shown in fig. 2 to 5, one end of the movable iron core 310 close to the stationary iron core 350 is provided with a protrusion 313, and one end of the stationary iron core 350 close to the movable iron core 310 is provided with a groove 351 matched with the protrusion 313, so that the relative area between the movable iron core 310 and the stationary iron core 350 can be effectively increased, and the magnetic field strength is improved. In some embodiments, the protrusions 313 may be triangular, square, cylindrical, etc. in configuration.

Optionally, as shown in fig. 2 and 3, a clamping portion 352 is further disposed on a groove wall of the groove 351, the permanent magnet 308 is located in the groove 351, and thus the bottom wall of the clamping portion 352 and the bottom wall of the groove 351 are matched and clamped with the clamping portion 352, so that the clamping portion 352 is limited in the groove 351.

In another aspect of the embodiments of the present application, a circuit breaker is provided, which includes a circuit breaker housing and any one of the above-mentioned actuating assemblies, where the actuating assembly is located in the circuit breaker housing. The mode that electro-magnet 300 direct drive button 120 moved, do not additionally set up intermediate transfer spare between electro-magnet 300 and button 120 promptly, so, can effectively improve transmission efficiency and closing speed, for example can improve to about fifty milliseconds, can effectively reduce electrical wear, improve the electric life-span of circuit breaker. In addition, the permanent magnet 308 can be further included, the permanent magnet 308 can be located on the electromagnet 300, and the directions of the magnetic fields of the permanent magnet 308 and the electromagnet 300 are the same, so that the magnetic fields of the permanent magnet 308 and the electromagnet 300 are superposed, further the driving force for the button 120 is increased, the closing speed can be further increased on one hand, and on the other hand, sufficient acting force can be provided for the breaker mechanism when the breaker mechanism exceeds the overtravel, so that the breaker has sufficient overtravel, and the contact reliability of the moving contact and the static contact is ensured.

The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims (10)

1. The action assembly is characterized by comprising a button (120), a permanent magnet (308) and an electromagnet (300) which are arranged in a shell of the circuit breaker, wherein the electromagnet (300) is in driving fit with the button (120), the permanent magnet (308) is arranged on the electromagnet (300), the directions of magnetic fields of the permanent magnet (308) and the electromagnet (300) are the same, and the electromagnet (300) is used for directly driving the button (120) to move towards the closing direction.

2. The moving assembly of claim 1, wherein the electromagnet (300) comprises a coil assembly and a moving core (310) and a static core (350) disposed within the coil assembly, the moving core (310) is in driving engagement with the button (120), and the permanent magnet (308) is disposed on the moving core (310) or the static core (350) to drive the button (120) toward closing motion by the moving core (310) when the coil assembly is energized.

3. The actuating assembly of claim 2, wherein the coil assembly comprises a frame (304) and a coil (305), the coil (305) is wound around the frame (304), a through hole (306) is formed in the frame (304), and the movable iron core (310), the stationary iron core (350) and the permanent magnet (308) are all located in the through hole (306).

4. The motion assembly of claim 2, wherein the electromagnet (300) further comprises a resilient member (307), the resilient member (307) being coupled to the plunger (310) for providing a return force to the plunger (310).

5. The actuating assembly according to claim 4, wherein the plunger (310) has a driving portion (315), the button (120) has a driven portion (122), the driving portion (315) drives the driven portion (122) to place the button (120) in a closed position when the coil assembly is energized, and the driving portion (315) is separated from the driven portion (122) by the restoring force when the coil assembly is de-energized.

6. The actuating assembly of claim 4, wherein the electromagnet (300) further comprises a magnetic yoke (301), the coil assembly is disposed on the magnetic yoke (301), and a limiting portion (312) is disposed on the movable iron core (310), so that the movable iron core (310) is in fit abutment with the magnetic yoke (301) through the limiting portion (312) after being reset.

7. The actuating assembly according to any one of claims 2 to 6, wherein a protrusion (313) is provided at an end of the movable core (310) adjacent to the stationary core (350), and a groove (351) engaged with the protrusion (313) is provided at an end of the stationary core (350) adjacent to the movable core (310).

8. The actuating assembly of claim 7, wherein a clamping portion (352) is further disposed on a wall of the groove (351), and the permanent magnet (308) is located in the groove (351) and is in clamping fit with the clamping portion (352).

9. The actuating assembly according to any one of claims 2 to 6, wherein a positioning portion (353) is further disposed at an end of the stationary core (350) facing away from the movable core (310), and the stationary core (350) is clamped with the circuit breaker housing through the positioning portion (353).

10. A circuit breaker comprising a circuit breaker housing and the action assembly of any one of claims 1 to 9.

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