Circuit breaker

Abstract

The invention provides a circuit breaker, and relates to the technical field of electrical equipment. The circuit breaker comprises a moving contact, a static contact, a first connecting conductor and a second connecting conductor, the first connecting conductor comprises a first connecting section, a flexible connecting section and a second connecting section which are connected in sequence, the first connecting section is used for being fixedly arranged on an installation shell and used for being connected with an external electrical element, and the second connecting section is connected with the moving contact. The moving contact moves synchronously along with the moving contact; the static contact is connected with the second connecting conductor; under the condition that the moving contact and the static contact are switched on, the first connecting section, the flexible connecting section, the second connecting section, the moving contact, the static contact and the second connecting conductor form a conductive loop, and the current direction of the first connecting section is opposite to that of the second connecting section and is the same as that of the second connecting conductor. The purpose of enhancing the contact pressure of the contact by using the electromagnetic force generated by the current in the closing state is achieved, so that the short-time tolerance performance and the operation reliability of the circuit breaker are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of electrical equipment, and in particular to a circuit breaker. Background Art

[0002] As a key protective component in electrical equipment, circuit breakers are widely used in various power distribution systems. They are used to reliably connect and disconnect circuits under normal or fault conditions, ensuring the safe and stable operation of power systems. Vacuum circuit breakers, in particular, are widely used in medium and high voltage applications due to their excellent arc extinguishing performance and long service life.

[0003] However, in actual use, especially under high current or short-circuit conditions, such vacuum circuit breakers are prone to generating large electrodynamic repulsion due to current concentration. This electrodynamic force not only affects contact stability but can also cause contacts to spring open or even damage during short-time withstand current testing, significantly reducing the circuit breaker's short-time withstand capability. This drawback limits the further application of vacuum circuit breakers in power distribution systems with stringent short-circuit protection requirements. Summary of the Invention

[0004] The present invention provides a circuit breaker that can ensure smooth movement of a moving contact while improving the short-time withstand capability of the circuit breaker under high fault current conditions, so as to meet the demand of the power distribution system for a high-performance protection circuit breaker.

[0005] The embodiments of the present invention can be implemented as follows: In a first aspect, the present invention provides a circuit breaker, comprising: Moving contact; static contact; a first connecting conductor, the first connecting conductor comprising a first connecting segment, a flexible connecting segment, and a second connecting segment connected in sequence, the first connecting segment being fixedly mounted on the mounting housing and connected to an external electrical component, the second connecting segment being connected to the moving contact to move synchronously with the moving contact, and at least a portion of the flexible connecting segment being configured to deform when the second connecting segment moves with the moving contact; a second connecting conductor, the static contact being connected to the second connecting conductor; In which, when the moving contact and the static contact are closed, the first connecting section, the soft connecting section, the second connecting section, the moving contact, the static contact and the second connecting conductor form a conductive loop, and the current direction of the first connecting section is opposite to that of the second connecting section, and is the same as the current direction of the second connecting conductor.

[0006] In an optional embodiment, the soft connecting section includes a first connecting portion, a deformable portion, and a second connecting portion connected in sequence, the first connecting portion is connected to the first connecting section, and the second connecting portion is connected to the second connecting section; The deformable portion is configured to bend under the drive of the second connecting portion so that the portion of the deformable portion connected to the second connecting portion moves synchronously with the second connecting portion; or the deformable portion is configured to stretch or compress under the drive of the second connecting portion.

[0007] In an optional embodiment, the deformable portion is provided with a first through hole, the first connecting section is provided with a second through hole, and the first through hole and the second through hole are provided correspondingly; The circuit breaker further includes an insulating member, which is movably disposed through the first through hole and the second through hole and connected to the moving contact, and is used to drive the moving contact to move toward or away from the static contact to close or open the circuit breaker.

[0008] In an optional embodiment, the first connecting portion is provided with a first mounting hole, and the first connecting section is provided with a second mounting hole, and the first mounting hole and the second mounting hole are used to be fixedly matched with a fastener; And / or, the second connecting portion is provided with a third mounting hole, the second connecting section is provided with a fourth mounting hole, and the third mounting hole and the fourth mounting hole are used for fixedly fitting with a fastener.

[0009] In an optional embodiment, the first connecting section is provided with a mounting groove, the second mounting hole is provided on a bottom wall of the mounting groove, and the first connecting portion and a portion of the deformable portion are embedded in the mounting groove.

[0010] In an optional embodiment, the flexible connecting section is made of a plurality of stacked conductive foils.

[0011] In an optional embodiment, the second connecting section is provided with a clamping portion, and the clamping portion clamps the moving contact.

[0012] In an optional embodiment, the second connecting section is further provided with at least two clamping arms connected to the clamping portion, and the clamping arms are provided with fifth mounting holes. The fifth mounting holes of at least two of the clamping arms are used to be fixedly matched with fasteners so that the clamping portion clamps the moving contact.

[0013] In an optional embodiment, the first connecting section is further provided with a sixth mounting hole for installing a fastener to fixedly mate with the external electrical component.

[0014] In an optional embodiment, in the linear motion direction of the moving contact toward the static contact, the first connecting section, the soft connecting section, the second connecting section, the moving contact, the static contact and the second connecting conductor are arranged in sequence.

[0015] The beneficial effects of the circuit breaker provided by the embodiment of the present invention include: the current direction of the first connecting section is opposite to that of the second connecting section, and is the same as the current direction of the second connecting conductor. Therefore, under the interaction of the electromagnetic force generated between the conductors, the contact pressure between the moving contact and the static contact is enhanced. Therefore, based on the characteristic of automatically increasing the contact pressure as the current increases, the circuit breaker's tolerance under large current short-circuit conditions is effectively improved, avoiding contact separation or poor contact due to electric repulsion; in addition, the first connecting conductor is a structure with flexible deformation ability, wherein the first connecting section is fixedly arranged on the mounting shell and establishes a stable connection with the external electrical component, and the second connecting section is directly connected to the moving contact to ensure that the moving contact can maintain good conductive performance during movement; and the soft connecting section can not only ensure the continuity of conductivity, but also have sufficient flexibility to adapt to the displacement change of the moving contact, so that during the closing and opening switching process of the circuit breaker, the conductive path where the soft connecting section is located can move synchronously with the moving contact without generating additional mechanical stress to hinder the operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0017] Figure 1 A simplified structural diagram of a circuit breaker provided in an embodiment of the present invention; Figure 2 A schematic diagram of the structure of a first connecting conductor provided in an embodiment of the present invention; Figure 3 A schematic diagram of the soft connection segment structure provided by an embodiment of the present invention; Figure 4 A schematic diagram of the structure of a first connecting section provided in an embodiment of the present invention; Figure 5 A schematic structural diagram of a second connecting section, a moving contact, and an insulating member provided in an embodiment of the present invention; Figure 6 A schematic cross-sectional view of a first connecting section and a soft connecting section provided in an embodiment of the present invention; Figure 7 Schematic diagram of the structure of the static contact, movable contact and vacuum bubble provided in an embodiment of the present invention; Figure 8 A schematic diagram of circuit breaker closing provided by an embodiment of the present invention; Figure 9 A schematic diagram of a circuit breaker opening according to an embodiment of the present invention; Figure 10 A cross-sectional view of another embodiment of a circuit breaker with respect to a flexible connection section provided by an embodiment of the present invention; Figure 11 A schematic structural diagram of another embodiment of a soft connection section of a circuit breaker provided in an embodiment of the present invention.

[0018] Icons: 10-circuit breaker; 100-moving contact; 200-static contact; 300-first connecting conductor; 310-first connecting section; 311-second through hole; 312-second mounting hole; 313-mounting groove; 314-sixth mounting hole; 320-soft connecting section; 321-first connecting part; 3211-first mounting hole; 322-deformation part; 3221-first through hole; 323-second connecting part; 3231-third mounting hole; 330-second connecting section; 331-fourth mounting hole; 332-clamping part; 333-clamping arm; 334-fifth mounting hole; 400-second connecting conductor; 500-insulating part; 600-vacuum bubble; 700-fastener. DETAILED DESCRIPTION

[0019] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0020] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort shall fall within the scope of protection of the present invention.

[0021] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0022] In the description of the present invention, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the accompanying drawings, or is the orientation or position relationship in which the product of the invention is usually placed when in use. It is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be understood as a limitation on the present invention.

[0023] In addition, the terms "first", "second", etc., if used, are merely used to distinguish and describe, and should not be understood as indicating or implying relative importance.

[0024] It should be noted that, in the absence of conflict, the features in the embodiments of the present invention may be combined with each other.

[0025] As a key protective component in electrical equipment, circuit breakers are widely used in various power distribution systems. They are used to reliably connect and disconnect circuits under normal or fault conditions, ensuring the safe and stable operation of power systems. Vacuum circuit breakers, in particular, are widely used in medium and high voltage applications due to their excellent arc extinguishing performance and long service life.

[0026] However, in actual use, especially under high current or short-circuit conditions, such vacuum circuit breakers are prone to generating large electrodynamic repulsion due to current concentration. This electrodynamic force not only affects contact stability but can also cause contacts to spring open or even damage during short-time withstand current testing, significantly reducing the circuit breaker's short-time withstand capability. This drawback limits the further application of vacuum circuit breakers in power distribution systems with stringent short-circuit protection requirements.

[0027] Based on the problems existing in the existing technology, please refer to Figures 1 to 9 An embodiment of the present invention provides a circuit breaker 10, which can solve the problem of contact stability of the vacuum circuit breaker 10 being affected by excessive electromotive force under high short-time withstand current conditions, so as to meet the demand of modern power distribution systems for high-performance protection circuit breakers 10.

[0028] Specifically, the circuit breaker 10 includes a movable contact 100, a stationary contact 200, a first connecting conductor 300, and a second connecting conductor 400. It is worth noting that the circuit breaker 10 also includes a mounting housing (not shown), in which the movable contact 100 is movably mounted. The stationary contact 200, the first connecting conductor 300, and the second connecting conductor 400 are also mounted.

[0029] Among them, the first connecting conductor 300 includes a first connecting section 310, a soft connecting section 320 and a second connecting section 330 connected in sequence. The first connecting section 310 is used to be fixedly arranged on the mounting shell and used to connect to external electrical components. The second connecting section 330 is connected to the moving contact 100 to move synchronously with the moving contact 100; the static contact 200 is connected to the second connecting conductor 400.

[0030] In other words, the first connecting section 310, the soft connecting section 320, the second connecting section 330, the moving contact 100, the static contact 200 and the second connecting conductor 400 are connected in sequence. Therefore, when the moving contact 100 and the static contact 200 are closed, the first connecting section 310, the soft connecting section 320, the second connecting section 330, the moving contact 100, the static contact 200 and the second connecting conductor 400 form a conductive loop, and current distribution in a specific direction is achieved in this loop, thereby improving the influence of electric force on the contact system.

[0031] During this process, since the current directions of the first connecting section 310 and the second connecting section 330 are opposite and the same as the current direction of the second connecting conductor 400, the contact pressure between the moving contact 100 and the static contact 200 is enhanced under the interaction of the electromagnetic force generated between the conductors. Therefore, based on the characteristic of automatically increasing the contact pressure as the current increases, the tolerance of the circuit breaker 10 under high current short-circuit conditions is effectively improved, avoiding contact separation or poor contact due to electric repulsion.

[0032] In addition, the first connecting conductor 300 is a structure with flexible deformation capability, wherein the first connecting section 310 is fixedly arranged on the mounting shell and establishes a stable connection with the external electrical component, and the second connecting section 330 is directly connected to the moving contact 100 to ensure that the moving contact 100 can maintain good conductivity during movement; and the soft connecting section 320 is a key transition component. The soft connecting section 320 deforms while the second connecting section 330 follows the movement of the moving contact 100, which not only ensures the continuity of conduction, but also has sufficient flexibility to adapt to the displacement change of the moving contact 100, so that during the closing and opening switching process of the circuit breaker 10, the conductive path where the soft connecting section 320 is located can move synchronously with the moving contact 100 without generating additional mechanical stress to hinder the operation.

[0033] Thus, the circuit breaker 10 provided in this embodiment of the present invention utilizes the electromagnetic force generated by the current itself to enhance contact pressure in the closed state by rationally arranging the conductor structure and its current direction, thereby improving the short-term withstand performance and operational reliability of the circuit breaker 10. Based on the above design, the circuit breaker 10 not only meets the requirements for high short-circuit current protection, but also takes into account the advantages of simple structure and reliable operation, making it suitable for applications with high requirements for electrical safety performance.

[0034] like Figure 3 As shown, the soft connection section 320 includes a first connection portion 321 , a deformation portion 322 and a second connection portion 323 connected in sequence. The first connection portion 321 is connected to the first connection section 310 , and the second connection portion 323 is connected to the second connection section 330 .

[0035] It should be noted that the flexible connection section 320 is made of a plurality of stacked conductive foils, which may be, but are not limited to, copper foil.

[0036] Specifically, the soft connection section 320 is made of multiple conductive foils using a stacking process, and the two ends of the soft connection section 320 are diffusion welded to improve the hardness of the end. After the two ends of the soft connection section 320 are pressed and hardened, they are silver-plated to form a first connection part 321 and a second connection part 323 respectively.

[0037] Therefore, in this embodiment, the first connecting portion 321 can be used to achieve electrical and mechanical connection with the first connecting section 310 to ensure that current can be stably introduced; the second connecting portion 323 can be used to establish a fixed connection with the second connecting section 330 to maintain the moving contact 100 in a continuously energized state during movement; and the deformable portion 322 located between the two is the core component for achieving the flexibility of the structure. Since the deformable portion 322 has the ability to bend and deform, it can produce corresponding deformation when the moving contact 100 moves up and down, so as to avoid stress concentration or movement interference caused by rigid connection, thereby ensuring the stability of the circuit connection and the smooth movement of the moving contact 100.

[0038] In detail, the deformation portion 322 is provided with a first through hole 3221 , and the first connecting section 310 is provided with a second through hole 311 , and the first through hole 3221 and the second through hole 311 are provided correspondingly.

[0039] It should be noted that the circuit breaker 10 also includes an insulating member 500, which can be movably inserted into the first through hole 3221 and the second through hole 311 and connected to the moving contact 100, and is used to drive the moving contact 100 toward or away from the static contact 200 to close or open the circuit breaker.

[0040] In this embodiment, the first through hole 3221 and the second through hole 311 are aligned to provide a mounting channel for the insulating member 500. Therefore, one end of the insulating member 500 is connected to the drive mechanism, and the other end is connected to the movable contact 100. When the drive mechanism drives the insulating member 500 to move in a linear direction, the driving mechanism can transmit a force to the movable contact 100, thereby controlling the movable contact 100 to move toward or away from the static contact 200, completing the closing or opening operation of the circuit breaker 10.

[0041] It should also be noted that the insulating member 500 is connected to the top of the moving contact 100, and the connection method can be, but is not limited to, a threaded connection. Figure 1 and Figure 7 As shown, the circuit breaker 10 further includes a vacuum bubble 600 , in which the moving contact 100 and the static contact 200 are both disposed. The moving contact 100 is cylindrical and can be movably disposed in the vacuum bubble 600 .

[0042] In addition, the first connection portion 321 is provided with a first mounting hole 3211, such as Figure 4 As shown, the first connecting section 310 is provided with a second mounting hole 312 , and the first mounting hole 3211 and the second mounting hole 312 are used for fixedly matching with the fastener 700 .

[0043] The second connection portion 323 is provided with a third mounting hole 3231, such as Figure 5 As shown, the second connecting section 330 is provided with a fourth mounting hole 331 , and the third mounting hole 3231 and the fourth mounting hole 331 are used for fixedly matching with the fastener 700 .

[0044] It is understood that the fastener 700 may be, but is not limited to, a bolt, a screw, etc.

[0045] Therefore, in this embodiment, by sequentially inserting the fastener 700 into the first mounting hole 3211 and the second mounting hole 312, the first connecting portion 321 can be firmly connected to the first connecting member; similarly, by sequentially inserting the fastener 700 into the third mounting hole 3231 and the fourth mounting hole 331, the second connecting portion 323 can be firmly connected to the second connecting section 330.

[0046] like Figure 4 As shown, the first connecting section 310 is provided with a mounting groove 313 , the second mounting hole 312 is provided on the bottom wall of the mounting groove 313 , and the first connecting portion 321 and a portion of the deformable portion 322 are embedded in the mounting groove 313 .

[0047] In this embodiment, the first connecting portion 321 and the partially deformable portion 322 of the flexible connecting segment 320 are designed to fit within the mounting groove 313. The second mounting hole 312 provided in the bottom wall of the groove engages with the fastener 700, achieving a secure fixation between the two. This not only ensures that the flexible connecting segment 320 does not separate from the first connecting segment 310 when subjected to stretching or bending deformation, but also effectively controls its displacement during dynamic movements. Furthermore, the mounting groove 313 provides a recessed space for the first connecting portion 321 of the flexible connecting segment 320 and the adjacent partially deformable region, thereby reducing the protrusion of this connection within the overall device and preventing structural damage due to external interference or vibration.

[0048] It should also be noted that the first connecting section 310 is further provided with a sixth mounting hole 314 for mounting a fastener 700 to be fixedly matched with an external electrical component.

[0049] It is worth mentioning that Figure 8 The closing state and Figure 9 As shown in the opening state, when the moving contact 100 and the static contact 200 are in the closing state, part of the deformed portion 322 is located in the entire mounting groove 313, and when the moving contact 100 and the static contact 200 are in the opening state, part of the deformed portion 322 away from the first connecting portion 321 will move outside the mounting groove 313.

[0050] That is, in this embodiment, the soft connecting section 320 is L-shaped in the closed state. During the vertical up and down movement of the moving contact 100, the soft connecting section 320 is further bent under the drive of the second connecting section 330 to allow the part where the soft connecting section 320 is connected to the second connecting section 330 to move vertically up and down following the second connecting section 330.

[0051] Of course, in other embodiments of the present invention, such as Figure 10 and Figure 11 As shown, the soft connecting section 320 can also be arc-shaped, so that during the vertical up and down movement of the moving contact 100, the soft connecting section 320 can be compressed or stretched under the drive of the second connecting section 330, so that the first connecting conductor 300 adapts to the displacement change of the moving contact 100.

[0052] Furthermore, if Figure 5 As shown, the second connecting section 330 is provided with a clamping portion 332 , and the clamping portion 332 clamps the moving contact 100 .

[0053] The second connecting section 330 is essentially a clamping member with a conductive function. Therefore, by clamping the movable contact 100 through the clamping portion 332, the second connecting section 330 and the movable contact 100 can be firmly connected and the conductive performance between the second connecting section 330 and the movable contact 100 can be ensured.

[0054] Specifically, the second connecting section 330 is also provided with at least two clamping arms 333 connected to the clamping portion 332, and the clamping arms 333 are provided with a fifth mounting hole 334. The fifth mounting holes 334 of at least two clamping arms 333 are used to be fixedly matched with the fastener 700 so that the clamping portion 332 clamps the moving contact 100.

[0055] It is also worth noting that in the linear movement direction of the moving contact 100 toward the static contact 200, the first connecting section 310, the soft connecting section 320, the second connecting section 330, the moving contact 100, the static contact 200 and the second connecting conductor 400 are arranged in sequence, and in the closed state, the distance between the first connecting section 310 and the second connecting section 330 reaches the maximum.

[0056] Therefore, when the moving contact 100 and the stationary contact 200 are closed, the flexible connecting section 320 can maintain its flexible deformation capability while forming a smooth current transfer path between adjacent components. At this time, the flexible connecting section 320 is in a relatively tight state. During the opening process, because the arrangement of the components aligns with the motion trajectory of the moving contact 100, the flexible connecting section 320 can naturally bend upward to adapt to the displacement of the moving contact 100, without causing stress concentration or mechanical jamming due to structural misalignment. This shows that while ensuring conductive continuity and mechanical flexibility, it effectively improves the stability and response speed of the circuit breaker 10 during dynamic operation.

[0057] In summary, an embodiment of the present invention provides a circuit breaker 10, in which the current directions of the first connecting section 310 and the second connecting section 330 are opposite, and the current direction is the same as the current direction of the second connecting conductor 400. Therefore, under the interaction of the electromagnetic force generated between the conductors, the contact pressure between the moving contact 100 and the static contact 200 is enhanced. Therefore, based on the characteristic of automatically increasing the contact pressure as the current increases, the circuit breaker 10 effectively improves its tolerance under high-current short-circuit conditions, avoiding contact separation or poor contact due to electrostatic repulsion.

[0058] In addition, the first connecting conductor 300 is a structure with flexible deformation capability, wherein the first connecting section 310 is fixedly arranged on the mounting housing and establishes a stable connection with the external electrical component, and the second connecting section 330 is directly connected to the moving contact 100 to ensure that the moving contact 100 can maintain good conductivity during movement; and the soft connecting section 320 can not only ensure the continuity of conductivity, but also have sufficient flexibility to adapt to the displacement changes of the moving contact 100, so that during the closing and opening switching process of the circuit breaker 10, the conductive path where the soft connecting section 320 is located can move synchronously with the moving contact 100 without generating additional mechanical stress to hinder the operation.

[0059] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included in the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A circuit breaker, characterized in that: include: Moving contact (100); Stationary contact (200); A first connecting conductor (300), the first connecting conductor (300) comprising a first connecting section (310), a soft connecting section (320), and a second connecting section (330) connected in sequence, the first connecting section (310) being fixedly disposed on a mounting housing and being connected to an external electrical component, the second connecting section (330) being connected to the moving contact (100) to move synchronously with the moving contact (100), and at least a portion of the soft connecting section (320) being configured to deform when the second connecting section (330) moves in synchronization with the moving contact (100); a second connecting conductor (400), the static contact (200) being connected to the second connecting conductor (400); Wherein, when the moving contact (100) and the static contact (200) are closed, the first connecting section (310), the soft connecting section (320), the second connecting section (330), the moving contact (100), the static contact (200) and the second connecting conductor (400) form a conductive loop, and the current direction of the first connecting section (310) is opposite to that of the second connecting section (330), and is the same as the current direction of the second connecting conductor (400).

2. The circuit breaker according to claim 1, wherein: The soft connection section (320) comprises a first connection portion (321), a deformation portion (322), and a second connection portion (323) connected in sequence, wherein the first connection portion (321) is connected to the first connection section (310), and the second connection portion (323) is connected to the second connection section (330); The deformable portion (322) is used to bend under the drive of the second connecting portion (323), so that the portion of the deformable portion (322) connected to the second connecting portion (323) moves synchronously with the second connecting portion (323); or the deformable portion (322) is used to stretch or compress under the drive of the second connecting portion (323).

3. The circuit breaker according to claim 2, wherein: The deformation portion (322) is provided with a first through hole (3221), the first connecting section (310) is provided with a second through hole (311), and the first through hole (3221) and the second through hole (311) are provided correspondingly; The circuit breaker further comprises an insulating member (500), which is movably arranged through the first through hole (3221) and the second through hole (311) and connected to the moving contact (100), and is used to drive the moving contact (100) to move toward or away from the static contact (200) to close or open the circuit breaker.

4. The circuit breaker according to claim 2, wherein: The first connecting portion (321) is provided with a first mounting hole (3211), and the first connecting section (310) is provided with a second mounting hole (312), and the first mounting hole (3211) and the second mounting hole (312) are used for fixedly cooperating with the fastener (700); And / or, the second connecting portion (323) is provided with a third mounting hole (3231), the second connecting section (330) is provided with a fourth mounting hole (331), and the third mounting hole (3231) and the fourth mounting hole (331) are used for fixed cooperation with the fastener (700).

5. The circuit breaker according to claim 4, characterized in that The first connecting section (310) is provided with a mounting groove (313), the second mounting hole (312) is provided on the bottom wall of the mounting groove (313), and the first connecting portion (321) and part of the deformable portion (322) are embedded in the mounting groove (313).

6. The circuit breaker according to any one of claims 1 to 5, characterized in that: The soft connection section (320) is made of a plurality of stacked conductive foils.

7. The circuit breaker according to claim 1, wherein: The second connecting section (330) is provided with a clamping portion (332), and the clamping portion (332) clamps the moving contact (100).

8. The circuit breaker according to claim 7, characterized in that The second connecting section (330) is further provided with at least two clamping arms (333) connected to the clamping portion (332), and the clamping arms (333) are provided with fifth mounting holes (334). The fifth mounting holes (334) of at least two of the clamping arms (333) are used for fixedly cooperating with fasteners (700) so that the clamping portion (332) clamps the moving contact (100).

9. The circuit breaker according to claim 1, wherein: The first connecting section (310) is further provided with a sixth mounting hole (314) for mounting a fastener (700) to securely engage with the external electrical component.

10. The circuit breaker according to claim 1, wherein: In the linear motion direction of the movable contact (100) toward the stationary contact (200), the first connecting section (310), the soft connecting section (320), the second connecting section (330), the movable contact (100), the stationary contact (200), and the second connecting conductor (400) are arranged in sequence.

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