Circuit breaker

Abstract

The circuit breaker comprises a shell, an operating mechanism and a contact mechanism, the operating mechanism comprises a lever, a jump pin and a lock catch, the contact mechanism comprises a moving contact and a static contact, the moving contact and the lever are coaxially and rotatably assembled, the moving contact and the lever are in driving connection through a contact spring, and an energy storage structure is further arranged in the shell. An energy storage piece of the energy storage structure is located on the rotating track of the moving contact and the jump pin, in the closing process, the moving contact is firstly matched with the energy storage piece in a limiting mode, the lever which continues to conduct closing rotation and the moving contact which stops rotating enable a contact spring to store energy, and when the jump pin triggers the energy storage piece and the moving contact to be unlocked along with rotation of the lever, the energy storage piece and the moving contact are unlocked. And the contact spring releases energy to drive the moving contact to quickly switch on and rotate. According to the utility model, the energy storage member is locked with the moving contact to store energy for the contact spring, then the energy storage member and the moving contact are unlocked through the jump pin to realize rapid switching on, the jump pin and the moving contact are coaxially assembled, and the jump pin is small in size and occupies a smaller space in a rotation process, thereby being beneficial to realizing miniaturization design.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of low-voltage apparatus, concretely relates to a circuit breaker. BACKGROUND

[0002] The circuit breaker is a kind of switch device that can close, carry and break the current under normal circuit conditions, and close, carry and break the current under abnormal circuit conditions within a specified time, wherein, the contact mechanism of the circuit breaker will generate arc when opening and closing, if the closing speed is not fast enough, the duration of arc generated between the contact mechanisms will be longer, which leads to the burning of the contact mechanism, thereby affecting the service life of the product.

[0003] In the existing product, the handle mechanism and the contact support are usually limited to each other to store energy for the energy storage member, and when the handle mechanism and the contact support are disengaged, the energy storage member can release energy to drive the movable contact to close rapidly, but due to the large distance between the handle and the contact support, a large rotating space needs to be reserved for their cooperation, which is not conducive to the miniaturization design of the product. SUMMARY

[0004] The utility model aims at overcoming at least one defect of prior art, and provides a circuit breaker.

[0005] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme:

[0006] The utility model provides a circuit breaker, including shell and the operating mechanism and contact mechanism that set up in the shell, the operating mechanism includes lever, jump buckle and lock buckle, jump buckle and lock buckle snap fit and respectively rotating assembly in lever, the contact mechanism includes movable contact and static contact that cooperate with each other, movable contact and lever coaxial rotation assembly, and movable contact and lever are connected by contact spring drive, the shell still is equipped with energy storage structure, the energy storage structure includes energy storage member, the energy storage member is located in the rotation track of movable contact and jump buckle, in the closing process, movable contact first and energy storage member limit fit, continue to close rotating lever and stop rotating movable contact to make contact spring energy storage, when jump buckle triggers energy storage member and movable contact to unlock along with the rotation of lever, energy release from the contact spring to drive movable contact to close rapidly.

[0007] Preferably, the energy storage member is rotatingly assembled on one side of the operating mechanism, the energy storage member is provided with a locking portion at one end close to the lever, and an unlocking portion at the other end away from the lever, the movable contact is provided with an engaging portion, the jump buckle is provided with a triggering portion, the locking portion is located on the rotation track of the engaging portion, and the unlocking portion is located on the rotation track of the triggering portion.

[0008] Preferably, the moving contact and the jumper are respectively rotatably connected to the two side surfaces of the lever, the locking portion and the triggering portion are respectively in two different planes, the locking portion corresponds to the same side of the lever as the moving contact, and the triggering portion rotates on the side surface of the lever facing the energy storage member to cooperate with the unlocking portion.

[0009] Preferably, the energy storage structure further comprises a reset member connected between the housing and the end of the energy storage member away from the jumper, and the reset member provides a reset force for the energy storage member after unlocking.

[0010] Preferably, the operating mechanism further comprises a tripping spring coaxially assembled with the lever, and the two ends of the tripping spring are respectively in elastic abutment with the housing and the lever.

[0011] Preferably, the moving contact comprises an assembly portion, a mounting hole is arranged in the middle of the assembly portion, one side edge of the assembly portion extends outward to form a contact arm, a moving contact point is arranged on the end side of the contact arm away from the assembly portion, a boss is arranged on one side of the assembly portion away from the contact arm, and a clamping groove is arranged on one side of the boss close to the assembly portion to form a hook-shaped clamping portion.

[0012] Preferably, the jumper comprises a jumper body, a first clasp portion is arranged on the end edge of one end of the jumper body, a first connecting hole is arranged on the end plate surface of the jumper body close to the first clasp portion, a boss is arranged on the end plate surface of the jumper body away from the first clasp portion, a second connecting hole is arranged in the boss, and the boss extends outward along the direction away from the first connecting hole to form a triggering portion on the side away from the first connecting hole.

[0013] Preferably, the energy storage member comprises a plate-shaped body, a notch groove is arranged on the end of the plate-shaped body close to the lever, the notch groove forms a strip-shaped locking portion on the end of the plate-shaped body, a rod-shaped unlocking portion is arranged on the other end of the plate-shaped body away from the lever, the central axis of the unlocking portion is perpendicular to the plane in which the plate-shaped body is arranged, and a third connecting hole is arranged in the middle of the plate-shaped body between the unlocking portion and the locking portion.

[0014] Preferably, the housing further comprises a short-circuit protection mechanism cooperating with the operating mechanism, and the short-circuit protection mechanism and the energy storage structure are distributed on opposite sides of the operating mechanism.

[0015] Preferably, the housing further comprises an arc extinguishing system, the arc extinguishing system comprises an arc extinguishing chamber, the stationary contact is arranged in the arc extinguishing chamber, and the moving contact passes through an arc inlet of the arc extinguishing chamber to cooperate with the stationary contact in the arc extinguishing chamber.

[0016] The circuit breaker of the utility model, the energy storage part is first locked with the movable contact as contact spring energy storage, then the energy storage part and the movable contact are unlocked through the jump buckle, the movable contact is driven by the contact spring to quickly close, the jump buckle is coaxially assembled with the movable contact, the volume of the jump buckle is smaller, the occupied space is smaller during rotation, the synchronism of the movable contact movement can be ensured, and miniaturization design is facilitated.

[0017] Particularly, the trigger part of the jump buckle rotates on one side surface of the energy storage part, the jump buckle and the energy storage part are arranged in a stack, the structure is more compact, and the required space of the two is further reduced.

[0018] In addition, the short-circuit protection mechanism and the energy storage structure are distributed on opposite sides of the operating mechanism, the layout is reasonable, and the whole is more compact.

[0019] In addition, the movable contact and the static contact are matched in the inside of the arc extinguishing chamber, the arc is directly generated in the inside of the arc extinguishing chamber, the space for setting the arc generating structure can be reduced or omitted, and the overall volume is facilitated to be reduced. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is the structural schematic diagram of the circuit breaker of the utility model during opening;

[0021] Figure 2 It is the structural schematic diagram of the circuit breaker of the utility model during closing and energy storage;

[0022] Figure 3 It is the structural schematic diagram of the circuit breaker of the utility model during closing and energy release;

[0023] Figure 4 It is the structural schematic diagram of the shell, operating mechanism and contact mechanism in the utility model;

[0024] Figure 5 It is the sectional view of the circuit breaker in the utility model;

[0025] Figure 6 It is the structural schematic diagram of the movable contact and the energy storage part in the utility model during limit cooperation;

[0026] Figure 7 It is the structural schematic diagram of the movable contact and the energy storage part in the utility model during limit cooperation (without jump buckle);

[0027] Figure 8 It is the structural schematic diagram of the jump buckle unlocking the energy storage part in the utility model;

[0028] Figure 9 It is the structural schematic diagram of the jump buckle in the utility model;

[0029] Figure 10 It is the structural schematic diagram of the movable contact in the utility model;

[0030] REFERENCE SIGNS:

[0031] 1 - housing, 10 - exhaust hole, 11 - partition, 12 - limiting groove, 2 - operating mechanism, 21 - lever, 22 - jump buckle, 221 - first buckle part, 222 - first connecting hole, 223 - second connecting hole, 224 - trigger part, 23 - lock buckle, 24 - opening spring, 3 - contact mechanism, 31 - movable contact, 310 - assembly part, 311 - assembly hole, 312 - contact arm, 313 - engaging part, 32 - static contact, 33 - contact spring, 40 - arc extinguishing chamber, 42 - arc entrance, 431 - movable arc initiation angle, 432 - static arc initiation angle, 44 - arc running channel, 5 - overload protection mechanism, 6 - short-circuit protection mechanism, 7 - energy storage structure, 71 - energy storage piece, 711 - locking part, 712 - unlocking part, 72 - reset piece, 8 - handle mechanism, 9 - terminal. DETAILED DESCRIPTION

[0032] The specific embodiments of the circuit breaker of the present application are further illustrated in the following examples in conjunction with the accompanying drawings. The circuit breaker of the present application is not limited to the description of the following examples.

[0033] As shown in Figures 1-4 , the circuit breaker comprises a housing 1, opposite ends of the housing 1 serving as terminals and being provided with terminals 9, the terminals 9 of the two terminals being usually arranged in pairs, the terminals 9 cooperating with terminal openings of the housing 1 for external wiring, and the housing 1 rotatably accommodating an operating mechanism 2, a contact mechanism and an arc extinguishing system, wherein the operating mechanism 2 is connected with a handle mechanism 8, an operating member of the handle mechanism 8 extending out of the housing 1 from a handle hole of the housing 1 for manually operating the opening and closing of the circuit breaker; the operating mechanism 2 comprises a lever 21 rotatably assembled, a jump buckle 22 and a lock buckle 23 rotatably assembled on the lever 21 in a buckle cooperation manner, the contact mechanism being electrically connected between a pair of terminals 9 for controlling the connection and disconnection of the connected circuit, the contact mechanism comprising a movable contact 31 and a static contact 32 cooperating with each other, wherein the movable contact 31 is coaxially rotatably assembled with the lever 21, and the movable contact 31 is drivingly connected with the lever 21 through a contact spring 33, the static contact 32 being fixedly arranged in the housing 1 and oppositely spaced from the movable contact 31, the movable contact 31 being driven by the operating mechanism 2 to approach or move away from the static contact 32; the arc extinguishing system is connected with the contact mechanism for extinguishing the arc generated by the contact mechanism, and the tail gas generated after the arc is extinguished is discharged out of the housing 1 through an exhaust hole 10 provided on the housing 1.

[0034] As shown in Figures 1-8As shown, the improvement of the present application is that the housing 1 is further provided with an energy storage structure 7, which comprises an energy storage piece 71 located on the rotation track of the movable contact 31 and the jump buckle 22. During the closing process, the movable contact 31 first limits the cooperation with the energy storage piece 71, and the lever 21 continues to rotate to stop the rotation of the movable contact 31 to store energy in the contact spring 33. When the jump buckle 22 triggers the energy storage piece 71 and the movable contact 31 to be unlocked along with the rotation of the lever 21, the energy is released by the contact spring 33 to drive the movable contact 31 to quickly close.

[0035] In this way, the energy storage piece 71 is first locked with the movable contact 31 to store energy in the contact spring 33, and then the jump buckle 22 unlocks the energy storage piece 71 and the movable contact 31 to drive the movable contact 31 to quickly close by the contact spring 33. The jump buckle 22 is coaxially assembled with the movable contact 31, and the volume of the jump buckle 22 is smaller, which occupies less space during rotation. It can not only ensure the synchronization of the action of the movable contact 31, but also be beneficial to realize the miniaturization design.

[0036] Specifically, as shown in Figures 1-3 , 6-8, the energy storage piece 71 is rotatably assembled on one side of the operating mechanism 2. One end of the energy storage piece 71 is provided with a locking portion 711, the movable contact 31 is provided with a clamping portion 313, and the jump buckle 22 is provided with a triggering portion 224. The locking portion 711 is located on the rotation track of the clamping portion 313, and the unlocking portion 712 is located on the rotation track of the triggering portion 224. When the lever 21 and the movable contact 31 are closed, the movable contact 31 and the jump buckle 22 assembled on the lever 21 can be matched with the locking portion 711 and the unlocking portion 712 respectively. Preferably, the locking portion 711 is arranged at one end of the energy storage piece 71 close to the lever 21, and the unlocking portion 712 is arranged at one end of the energy storage piece 71 away from the lever 21.

[0037] Preferably, the movable contact 31 and the jump buckle 22 are rotatably connected to the two side surfaces of the lever 21 respectively, the locking portion 711 and the triggering portion 224 are located on two different planes respectively, the locking portion 711 and the movable contact 31 correspond to the same side of the lever 21, and the triggering portion 224 is rotatable on the side surface of the energy storage piece 71 facing the lever 21 to cooperate with the unlocking portion 712, so that the jump buckle 22 and part of the energy storage piece 71 are arranged in a stacked manner, and the structure is more compact, which can further reduce the required space of the two. Of course, the triggering portion 224 and the energy storage piece 71 can also not form a stacked structure.

[0038] Further, as shown in Figures 1-3 , 6-8, the energy storage structure 7 further comprises a reset piece 72 connected between the housing 1 and one end of the energy storage piece 71 away from the jump buckle 22. The reset piece 72 provides a reset force for the unlocked energy storage piece 71. The reset piece 72 can be selected from a torsional spring or a spring. The torsional spring can be coaxially rotatably assembled with the energy storage piece 71, and the spring can be arranged on one side of the energy storage piece 71.

[0039] Combination Figures 1-10 A specific embodiment of a circuit breaker is provided.

[0040] like Figures 1-3 As shown, the circuit breaker includes a housing 1. Each terminal of the housing 1 is provided with at least one terminal 9, and two terminals are provided with at least one pair of terminal 9s. Each pair of terminal 9s is divided into an incoming terminal and an outgoing terminal. Between each pair of terminal 9s, there is a handle mechanism 8, an operating mechanism 2, and a contact mechanism. The handle mechanism 8 and the operating mechanism 2 are rotatably mounted in the housing 1, and the handle mechanism 8 and the operating mechanism 2 are linked together. The operating element of the handle mechanism 8 extends out from the handle hole opened in the housing 1. The contact mechanism includes a moving contact 31 and a stationary contact 32 that are spaced apart from each other. The moving contact 31 is linked to the operating mechanism 2 and is driven by the operating mechanism 2 to move closer to or away from the stationary contact 32 that is fixedly installed in the housing 1.

[0041] Among them, such as Figures 1-4 As shown, the operating mechanism 2 includes a lever 21, which is rotatably mounted inside the housing 1. A trip latch 22 and a locking latch 23 are rotatably mounted on the lever 21. During normal opening and closing of the circuit breaker, the trip latch 22 and the locking latch 23 engage. The moving contact 31 is coaxially rotatably mounted with the lever 21. A contact spring 33 is provided between the moving contact 31 and the lever 21. Figure 4 , 5 As shown, the contact spring 33 is a torsion spring. The two elastic arms of the contact spring 33 abut against the moving contact 31 and the lever 21, respectively. As the lever 21 and the moving contact 31 rotate, the contact spring 33 can both provide a linkage function and store energy when relative movement occurs between the lever 21 and the moving contact 31. Figures 1-4 As shown, the jump buckle 22 and the moving contact 31 are rotatably connected to the two sides of the lever 21, respectively. It can also be understood that the lever 21 is stacked between the moving contact 31 and the jump buckle 22. The jump buckle 22 is provided with a trigger part 224, which extends to the surface of the lever 21. The moving contact 31 is provided with a locking part 313, which also protrudes from the lever 21.

[0042] Furthermore, such as Figure 4 , 5 As shown, the operating mechanism 2 is also equipped with a tripping spring 24, which is a torsion spring. The tripping spring 24 is coaxially assembled with the lever 21, and its two ends are elastically in contact with the outer casing 1 and the lever 21, respectively. When the lever 21 is closed, it stores energy in the tripping spring 24. When the lever is opened, the tripping spring 24 releases energy, driving the lever 21 to rotate rapidly in the opening direction, thereby driving the moving contact 31 to quickly separate from the stationary contact 32. Figure 4 , 5As shown, the opening spring 24 and the contact spring 33 are coaxially assembled in the third direction, and a boss or groove structure for cooperating with the opening spring 24 can be provided on the housing 1.

[0043] like Figures 1-3 As shown, an energy storage structure 7 is also provided inside the outer casing 1. The energy storage structure 7 includes an energy storage component 71, which is rotatably mounted on one side of the operating mechanism 2. The energy storage component 71 is located on the rotation trajectory of the moving contact 31 and the trip latch 22. That is, one end of the energy storage component 71 is provided with a locking part 711, and the other end is provided with an unlocking part 712. The locking part 711 is located on the rotation trajectory of the engaging part 313, and the unlocking part 712 is located on the rotation trajectory of the trigger part 224. During the closing process, the moving contact 31 and the lever 21 rotate together to close the circuit. When the engaging part 313 of the moving contact 31 abuts against the locking part 711 of the energy storage component 71 (see...), the closing part 711 is closed. Figure 2 , 7 The moving contact 31 first engages with the energy storage element 71, while the lever 21 continues to rotate. The rotating lever 21 and the stopped moving contact 31 move relative to each other, causing the contact spring 33 to elastically deform and store energy. During the continued rotation of the lever 21, the trigger part 224 of the trip latch 22 pushes the unlocking part 712 to drive the energy storage element 71 to unlock and rotate (see...). Figure 3 , 8 This causes the engaging part 313 to separate from the locking part 711, and then the contact spring 33 releases energy to drive the moving contact 31 to quickly close and rotate.

[0044] In this embodiment, the locking part 711 and the triggering part 224 of the energy storage component 71 are located on two different planes. The locking part 711 and the moving contact 31 are located on the same side of the lever 21. The triggering part 224 rotates on the side surface of the energy storage component 71 facing the lever 21 to cooperate with the unlocking part 712.

[0045] Combination Figures 1-4 6, 8, and 9 provide a snap fastener 22 structure applicable to this embodiment. The snap fastener 22 structure is similar to the existing snap fastener 22 structure, that is, the snap fastener 22 includes a snap fastener body, the snap fastener body preferably having an arc-shaped plate at one end, and a first latching portion 221 provided at one end edge of the snap fastener body. The first latching portion 221 is used to form a latching engagement with the second latching portion of the latch 23. A first connecting hole 222 is provided on one end plate surface of the snap fastener body near the first latching portion 221. The linkage rod between the handle mechanism 8 and the lever 21 passes through the first connecting hole 222 and connects to the snap fastener 22. A boss is provided on one end plate surface of the snap fastener body away from the first latching portion 221. The boss has a second connecting hole 223. The side of the boss away from the first connecting hole 222 extends outward in a direction away from the first connecting hole 222 to form a trigger portion 224. Figure 9 In the middle, the trigger part 224 is generally in the shape of a straight plate.

[0046] In combination Figures 1-4 , 10 provides a moving contact 31 applied to the embodiment, the moving contact 31 comprises an assembly part 310, Figure 10 , the assembly part 310 is a circular shaft as a whole, the assembly part 310 is provided with an assembly hole 311 in the middle part, one side edge of the assembly part 310 extends outward to form a contact arm 312, the contact arm 312 is provided with a moving contact point at the end away from the assembly part 310, the assembly part 310 away from the contact arm 312 is provided with a boss, the boss is provided with a clamping groove on the side close to the assembly part 310 to form a hook-shaped clamping part 313, the clamping part 313 can limit the moving contact 31 from continuing to close the rotating when cooperating with the locking part 711, of course, the clamping part 313 can also be used for elastic abutment with the contact spring 33.

[0047] In combination Figures 1-3 , 6-8 provides a structure of the energy storage member 71 applied to the embodiment, the energy storage member 71 comprises a plate-shaped body, Figure 7 , the plate-shaped body is rectangular, the plate-shaped body is provided with a notched groove at one end, that is, the plate-shaped body is provided with a notched groove at the end close to the lever 21, the notched groove makes the one end of the plate-shaped body form a strip-shaped locking part 711, the other end of the plate-shaped body is provided with a rod-shaped unlocking part 712, that is, the unlocking part 712 is arranged at the end of the plate-shaped body away from the lever 21, the central axis of the unlocking part 712 is perpendicular to the plane where the plate-shaped body is located, the middle part of the plate-shaped body between the unlocking part 712 and the locking part 711 is provided with a third connecting hole, the energy storage member 71 is rotatably assembled in the shell 1 through the third connecting hole.

[0048] As Figures 1-3 , 6-8 shows that the energy storage structure 7 further comprises a reset member 72, the reset member 72 is connected between the shell 1 and the end of the energy storage member 71 away from the jump buckle 22, the reset member 72 provides a reset force for the unlocked energy storage member 71, in the figure, the reset member 72 is a spring, one end of the reset member 72 is connected with the end of the energy storage member 71 provided with the unlocking part 712, the other end of the reset member 72 cooperates with a limiting table or a limiting groove 12 in the shell 1.

[0049] In the embodiment, the housing 1 can also be configured with an arc extinguishing system and a protection mechanism, the arc extinguishing system and the protection mechanism can adopt prior art, wherein the arc extinguishing system comprises an arc extinguishing chamber 40, an arc inlet 42 of the arc extinguishing chamber 40 is connected with the operating mechanism 2 for introducing the arc generated by the contact mechanism into the arc extinguishing chamber 40, of course, the arc extinguishing system can also be configured with a movable arc leading corner 431 and a static arc leading corner 432 matched with the movable contact 31 and the static contact 32 respectively, an end of the arc extinguishing chamber 40 opposite to the arc inlet 42 is an exhaust end, the exhaust end is provided with an arc running channel 44, the arc running channel 44 is connected with the exhaust hole 10 formed on the housing 1; the protection mechanism is matched with the operating mechanism 2 for triggering the operating mechanism 2 to trip, so that the contact mechanism is tripped to realize power-off protection, the protection mechanism comprises a short-circuit protection mechanism 6 and / or an overload protection mechanism 5, wherein the short-circuit protection mechanism 6 is matched with the operating mechanism 2, when a short-circuit fault occurs, the short-circuit protection mechanism 6 pushes the lock catch 23 to release the snap-fit of the lock catch 23 and the trip catch 22, and triggers the operating mechanism 2 to trip; the overload protection mechanism 5 is matched with the operating mechanism 2, when an overload fault occurs, the overload protection mechanism 5 pushes the lock catch 23 to release the snap-fit of the lock catch 23 and the trip catch 22, and triggers the operating mechanism 2 to trip.

[0050] It should be noted that, in the description of the present application, the terms "upper", "lower", "left", "right", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in use, and are only for the convenience of description, and do not indicate that the device or element referred to must have a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third" and the like are only used for differentiation in description, and cannot be understood as indicating relative importance.

[0051] The above is a further detailed description of the present application in combination with specific preferred embodiments, and the specific implementation of the present application cannot be limited to these descriptions. For ordinary skilled persons in the technical field to which the present application belongs, some simple deductions or substitutions can be made without departing from the concept of the present application, and all of them should be regarded as falling within the protection scope of the present application.

Claims

1. A circuit breaker, comprising a housing (1) and an operating mechanism (2) and a contact mechanism disposed within the housing (1), wherein the operating mechanism (2) comprises a lever (21), a trip latch (22) and a latch (23), the trip latch (22) and the latch (23) being latched together and rotatably mounted on the lever (21), and the contact mechanism comprising a moving contact (31) and a stationary contact (32) cooperating with each other, the moving contact (31) being coaxially rotatably mounted with the lever (21), and the moving contact (31) and the lever (21) being driven connected by a contact spring (33). Its features are: The outer casing (1) is also provided with an energy storage structure (7), which includes an energy storage component (71). The energy storage component (71) is located on the rotation trajectory of the moving contact (31) and the trip latch (22). During the closing process, the moving contact (31) first engages with the energy storage component (71) for limiting. The lever (21) that continues to rotate and the moving contact (31) that stops rotating cause the contact spring (33) to store energy. When the trip latch (22) triggers the energy storage component (71) and the moving contact (31) to unlock as the lever (21) rotates, the contact spring (33) releases energy to drive the moving contact (31) to quickly close and rotate.

2. The circuit breaker according to claim 1, characterized in that: The energy storage component (71) is rotatably mounted on one side of the operating mechanism (2). The energy storage component (71) has a locking part (711) at one end near the lever (21) and an unlocking part (712) at the other end away from the lever (21). The moving contact (31) has a locking part (313), and the jump buckle (22) has a triggering part (224). The locking part (711) is located on the rotation trajectory of the locking part (313), and the unlocking part (712) is located on the rotation trajectory of the triggering part (224).

3. The circuit breaker according to claim 2, characterized in that: The moving contact (31) and the jumper (22) are rotatably connected to the two sides of the lever (21). The locking part (711) and the triggering part (224) are located on two different planes. The locking part (711) and the moving contact (31) correspond to the same side of the lever (21). The triggering part (224) rotates on the side surface of the energy storage member (71) facing the lever (21) to cooperate with the unlocking part (712).

4. The circuit breaker according to any one of claims 1-3, characterized in that: The energy storage structure (7) also includes a reset member (72), which is connected between the outer shell (1) and the end of the energy storage member (71) away from the jumper (22). The reset member (72) provides a reset force for the unlocked energy storage member (71).

5. The circuit breaker according to claim 1, characterized in that: The operating mechanism (2) also includes a gate spring (24), which is coaxially assembled with the lever (21). The two ends of the gate spring (24) are elastically abutted against the outer shell (1) and the lever (21) respectively.

6. The circuit breaker according to claim 1, characterized in that: The moving contact (31) includes an assembly part (310), the assembly part (310) has an assembly hole (311) in the middle, and one side edge of the assembly part (310) extends outward to form a contact arm (312). The side of the contact arm (312) away from the assembly part (310) has a moving contact point. The side of the assembly part (310) away from the contact arm (312) has a boss. The boss has a slot on the side close to the assembly part (310) to form a hook-shaped engaging part (313).

7. The circuit breaker according to claim 1, characterized in that: The snap fastener (22) includes a snap fastener body. One end edge of the snap fastener body is provided with a first snap part (221). The end plate of the snap fastener body near the first snap part (221) is provided with a first connecting hole (222). The end plate of the snap fastener body away from the first snap part (221) is provided with a boss. The boss is provided with a second connecting hole (223). The side of the boss away from the first connecting hole (222) extends outward in a direction away from the first connecting hole (222) to form a trigger part (224).

8. The circuit breaker according to claim 1, characterized in that: The energy storage component (71) includes a plate-shaped body. One end of the plate-shaped body near the lever (21) is provided with a notch. The notch forms a strip-shaped locking part (711) at one end of the plate-shaped body. The other end of the plate-shaped body away from the lever (21) is provided with a rod-shaped unlocking part (712). The central axis of the unlocking part (712) is perpendicular to the plane of the plate-shaped body. A third connecting hole is provided in the middle of the plate-shaped body between the unlocking part (712) and the locking part (711).

9. The circuit breaker according to claim 1, characterized in that: The outer casing (1) is also provided with a short-circuit protection mechanism (6) that cooperates with the operating mechanism (2). The short-circuit protection mechanism (6) and the energy storage structure (7) are distributed on opposite sides of the operating mechanism (2).

10. The circuit breaker according to claim 1, characterized in that: An arc-extinguishing system is also provided inside the outer casing (1). The arc-extinguishing system includes an arc-extinguishing chamber (40). The stationary contact (32) is disposed inside the arc-extinguishing chamber (40). The moving contact (31) passes through the arc inlet (42) of the arc-extinguishing chamber (40) and cooperates with the stationary contact (32) inside the arc-extinguishing chamber (40).

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