Circuit breaker

Abstract

The circuit breaker comprises a shell, an operating mechanism and at least one circuit breaker pole, the operating mechanism comprises a jump pin shaft assembled in a rotating mode and a jump pin connected to the jump pin shaft, a contact mechanism of the circuit breaker pole comprises a rotating shaft, a moving contact and a static contact, and a connecting rod assembly is connected between the jump pin and the rotating shaft. An auxiliary switch module used for outputting pre-closing or pre-opening signals is further arranged in the shell and comprises at least two parallel microswitches, in the closing process, at least one microswitch is triggered by the tripping shaft before the moving contact makes contact with the static contact, and in the opening process, at least one microswitch is triggered by the tripping shaft before the moving contact makes contact with the static contact. And at least another microswitch is triggered by the rotating shaft before the moving contact is separated from the static contact. According to the utility model, before the moving contact and the static contact are contacted or separated, the microswitch is triggered through the jump pin shaft and the rotating shaft respectively, so that the auxiliary switch module outputs a pre-closing or pre-opening signal in advance, and the sensitivity of the auxiliary switch module and the reliability of a product are improved.

Description

Technical Field

[0001] The utility model relates to the field of low-voltage electrical appliances, in particular to a circuit breaker. Background Art

[0002] A circuit breaker is a switch device that can close, carry and disconnect current under normal circuit conditions and close, carry and disconnect current under abnormal circuit conditions within a specified time. In some circuit breakers, an auxiliary switch module for generating pre-signals is configured inside, but the pre-opening signal generation structure in the auxiliary switch module has problems such as low sensitivity, cumbersome design and unstable structure, which leads to the inability to detect the opening or give the corresponding signal in a timely and accurate manner in actual applications, resulting in false alarms or missed alarms, and being easily affected by the outside world, resulting in maintenance difficulties, poor adaptability and low reliability. Summary of the invention

[0003] The purpose of the utility model is to overcome at least one defect of the prior art and provide a circuit breaker.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] The utility model provides a circuit breaker, comprising a shell, wherein an operating mechanism and at least one circuit breaker pole are arranged in the shell, wherein the operating mechanism comprises a pair of side plates arranged at intervals, a rocker arm is rotatably mounted on the pair of side plates, a tripping shaft and a locking shaft are rotatably mounted between the pair of side plates, a tripping shaft is connected with a tripping shaft, a locking shaft is connected with a locking buckle, the tripping buckle and the locking buckle are snap-fitted, the circuit breaker pole comprises a contact mechanism, wherein the contact mechanism comprises a rotating shaft, a moving contact and a stationary contact, a connecting rod assembly is connected between the tripping buckle and the rotating shaft, a rocker arm spring is connected between the rocker arm and the connecting rod assembly, the moving contact is connected to the rotating shaft and cooperates with the stationary contact, an auxiliary switch module for outputting a pre-closing or pre-opening signal is further arranged in the shell,

[0006] The auxiliary switch module includes at least two micro switches arranged in parallel. During the closing process, at least one micro switch is triggered by the tripping shaft before the moving contact contacts the static contact. During the opening process, at least another micro switch is triggered by the rotating shaft before the moving contact separates from the static contact.

[0007] Preferably, a first toggle member is connected to the tripping shaft, a second toggle member is rotatably provided on one side of the operating mechanism, the second toggle member is linked to the rotating shaft, the trigger part of at least one micro switch is located on the moving trajectory of the first toggle member, and the trigger part of at least another micro switch is located on the moving trajectory of the second toggle member.

[0008] Preferably, the micro switch is arranged between the first toggle member and the second toggle member.

[0009] Preferably, one end of the second toggle member is rotatably connected and equipped with a reset elastic member, and the other end of the second toggle member is linked to the matching part of the rotating shaft, and the middle part of the second toggle member is spaced opposite to the trigger part of at least one micro switch.

[0010] Preferably, the first toggle member includes a rod-shaped body, a first connecting portion is provided at one end of the rod-shaped body, a first connecting hole is provided on the first connecting portion, the first connecting hole is connected to the tripping shaft, and the other end of the rod-shaped body is bent to form a first driving portion for triggering the micro switch, and the first driving portion and the first connecting portion are respectively located on opposite sides of the rod-shaped body.

[0011] Preferably, the second toggle member includes a pair of connecting arms arranged at intervals, one end of the pair of connecting arms is used as the second connecting part and is provided with a second connecting hole, a connecting shaft is connected between the pair of second connecting holes, a reset elastic member is sleeved on the connecting shaft, the other ends of the pair of connecting arms are connected together to form a second driving part, the second driving part is connected with a bent arm, and the bent arm is used as a linkage part and is linked to the rotating shaft.

[0012] Preferably, one end of the shell is provided with an operating hole as an operating end, a connecting piece connected to the operating mechanism extends out of the shell from the operating hole, an inner shell is also provided inside the shell, and the micro switch is provided at an outer end of the inner shell adjacent to the operating end.

[0013] Preferably, an attachment groove is provided at one end of the inner shell close to the operating end, and the linkage portion of the second toggle member extends into the attachment groove and is linkage-connected with the matching portion of the rotating shaft.

[0014] Preferably, a wiring cavity is reserved between the inner shell and the outer shell, one end of the wiring cavity is adjacent to the accessory slot, and a wiring board is arranged in the wiring cavity.

[0015] Preferably, a bracket is fixed on one side of the operating mechanism, the micro switch is arranged on the bracket, and two adjacent micro switches are separated by a partition plate on the bracket.

[0016] Preferably, the bracket includes a first assembly groove and a second assembly groove, the opening of the first assembly groove and the opening of the second assembly groove are located on the same side of the bracket, the first groove bottom of the first assembly groove is higher than the second groove bottom of the second assembly groove, so that the first groove bottom and the second groove bottom are connected to form a step surface, and the first groove bottom is provided with a matching hole, and the trigger part of the micro switch is exposed from the matching hole.

[0017] The circuit breaker of the utility model triggers the micro switch through the tripping shaft and the rotating shaft respectively before the moving contact contacts or separates with the static contact. By controlling the micro switch, the auxiliary switch module outputs the pre-closing or pre-opening signal in advance, thereby improving the sensitivity of the auxiliary switch module and the reliability of the product.

[0018] In addition, the first toggle member and the second toggle member are respectively linked with the tripping shaft and the rotating shaft, further improving the sensitivity of generating the pre-closing signal and the pre-opening signal.

[0019] In addition, by configuring the inner shell to assemble the circuit breaker pole, a modular structure is formed, and at the same time, an accessory groove is provided on the inner shell to facilitate the linkage between the rotating shaft and the second toggle member.

[0020] In addition, the micro switch is arranged on one side of the operating mechanism through a bracket, which has the advantage of convenient assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is an exploded schematic diagram of the plug-in circuit breaker in the utility model;

[0022] Figure 2 This is a schematic diagram of the cooperation between the micro switch and the first toggle member and the second toggle member in the utility model. Figure 1 ;

[0023] Figure 3 This is a schematic diagram of the cooperation between the micro switch and the first toggle member and the second toggle member in the utility model. Figure 2 ;

[0024] Figure 4 It is an exploded schematic diagram of the micro switch, the first toggle member and the second toggle member in the utility model;

[0025] Figure 5 It is a structural schematic diagram of the bracket in the utility model;

[0026] Figure 6 It is a structural schematic diagram of the first toggle member in the utility model;

[0027] Figure 7 It is a structural schematic diagram of the second toggle member in the utility model;

[0028] Reference numerals:

[0029] 111-first end cover, 112-second end cover, 113-first side wall, 114-second side wall, 115-wiring board, 12-inner shell, 21-first toggle member, 211-first connecting part, 212-first driving part, 22-second toggle member, 221-second connecting part, 222-second driving part, 223-linkage part, 23-micro switch, 24-bracket, 241-first assembly groove, 242-second assembly groove, 25-resetting elastic member, 3-operating mechanism, 31-jump buckle shaft, 32-jump buckle, 41-rotating shaft. DETAILED DESCRIPTION

[0030] The following is a further description of the specific implementation of the circuit breaker of the present utility model in conjunction with the embodiments given in the accompanying drawings. The circuit breaker of the present utility model is not limited to the description of the following embodiments.

[0031] The circuit breaker includes a shell, in which an operating mechanism 3 and at least one circuit breaker pole are arranged. An operating hole is opened on the shell, and an operating member of the operating mechanism 3 extends out of the shell from the operating hole for manually driving the operating mechanism 3. The circuit breaker pole includes a pair of terminals and a contact mechanism connected between the pair of terminals. The contact mechanism includes a rotating shaft 41, a moving contact and a stationary contact. The rotating shaft 41 is rotatably assembled and linked with the operating mechanism 3. The moving contact is connected to the rotating shaft 41. The operating mechanism 3 is driven to drive the rotating shaft 41 to rotate, and the rotating shaft 41 drives the moving contact to contact or separate with the stationary contact.

[0032] Specifically, the operating mechanism 3 includes a pair of side plates arranged at intervals, the rocker arm is rotatably assembled on the pair of side plates, a jumper shaft 31 and a lock shaft are rotatably assembled between the pair of side plates, the jumper shaft 31 and the lock shaft are respectively rotatably assembled on opposite sides of the space between the pair of side plates, a jumper 32 is connected to the jumper shaft 31, and a lock is connected to the lock shaft, the jumper 32 is snap-fitted with one end of the lock, a connecting rod assembly is connected between the jumper 32 and the rotating shaft 41, the lock is matched with a re-locking limiter rotatably assembled between the pair of side plates, a rocker arm spring is connected between the rocker arm and the connecting rod assembly, and the connecting rod assembly is connected to the rotating shaft 41.

[0033] A control module and an auxiliary switch module are also provided in the housing. The control module includes a circuit board on which a controller is provided. The auxiliary switch module is connected to the circuit board, and the auxiliary switch module outputs a pre-closing or pre-opening signal to the controller.

[0034] The improvement of the present application is that the auxiliary switch module includes at least two micro switches 23 arranged in parallel. During the closing process, at least one micro switch 23 is triggered by the tripping shaft 31 before the moving contact contacts the static contact, so that the auxiliary switch module outputs a pre-closing signal; during the opening process, at least another micro switch 23 is triggered by the rotating shaft 41 before the moving contact separates from the static contact, so that the auxiliary switch module outputs a pre-opening signal.

[0035] In this way, before the moving contact contacts or separates with the static contact, the micro switch 23 is triggered by the tripping shaft 31 and the rotating shaft 41 respectively. By controlling the micro switch 23, the auxiliary switch module outputs a pre-closing or pre-opening signal in advance, thereby improving the sensitivity of the auxiliary switch module and the reliability of the product.

[0036] Specifically, the first toggle member 21 is connected to the tripping shaft 31, and the second toggle member 22 is rotatably mounted on one side of the operating mechanism 3. Preferably, the first toggle member 21 and the second toggle member 22 are both located on the same side of the operating mechanism 3, and a gap for mounting a micro switch 23 is reserved between the first toggle member 21 and the second toggle member 22. The triggering portion of at least one micro switch 23 is located on the moving track of the first toggle member 21, and the triggering portion of at least another micro switch 23 is located on the moving track of the second toggle member 22. Furthermore, a reset elastic member 25 is also connected to the second toggle member 22, and the reset elastic member 25 drives the second toggle member 22 to reset.

[0037] Combination Figure 1-7 A specific embodiment of a circuit breaker is provided, and this embodiment takes a plug-in circuit breaker as an example.

[0038] like Figure 1 As shown, the circuit breaker includes a shell, one end of the shell is provided with an operating hole as an operating end, and the other end of the shell opposite to the operating end is provided with at least one pair of wiring sockets as a wiring terminal. In this embodiment, the shell includes a pair of spaced end covers. For the convenience of description, the pair of end covers are respectively a first end cover 111 and a second end cover 112. The first end cover 111 serves as an operating end and is provided with an operating hole, and the second end cover 112 serves as a wiring terminal and is provided with at least one pair of wiring sockets. Two pairs of side walls are connected between the pair of end covers, wherein a pair of spaced side walls are first side walls 113, and a plurality of spaced heat dissipation holes can be provided on the first side wall 113, and the other pair of spaced side walls are second side walls 114.

[0039] An inner shell 12 is also provided in the outer shell, and an operating mechanism 3 is provided between the inner shell 12 and the first end cover 111. The operating mechanism 3 can adopt the existing technology. Specifically, the operating mechanism 3 includes a pair of side plates arranged at intervals, and the side plates can be supported between the inner shell 12 and the first end cover 111. A rocker arm, a jump buckle shaft 31 and a lock buckle shaft are rotatably provided between the pair of side plates, and the jump buckle shaft 31 and the lock buckle shaft are respectively located on opposite sides of the rocker arm, and the jump buckle shaft 31 and the lock buckle shaft are respectively connected with a jump buckle 32 and a lock buckle, and the jump buckle 32 is snap-fitted with one end of the lock buckle, and a connecting rod assembly is connected to the jump buckle 32. Usually, the connecting rod assembly includes an upper connecting rod and a lower connecting rod, wherein one end of the upper connecting rod is connected to the jump buckle 32, a rocker arm spring is connected between the hinge between the upper connecting rod and the lower connecting rod and the rocker arm, the lock buckle is matched with a re-buckle limiter rotatably provided between a pair of side plates, and the lower connecting rod is directly or indirectly connected to the rotating shaft 41. In addition, a traction rod is provided on one side of the operating mechanism 3, and the traction rod is used to drive the re-lock, so that the re-lock and the lock buckle 32 are released from the limit fit, and the lock buckle 32 and the jump buckle are released from the buckle fit, so as to realize the disengagement of the operating mechanism 3.

[0040] At least one circuit breaker pole is arranged in the outer shell, each circuit breaker pole includes a pair of wiring terminals and a contact mechanism connected between the pair of wiring terminals, the wiring terminals are arranged at one end of the inner shell 12 close to the wiring terminals, the inner shell 12 is provided with a through hole for exposing the wiring terminals, so that each wiring terminal corresponds to a wiring socket respectively, of course, the wiring terminals can also be arranged between the inner shell 12 and the outer shell; the contact mechanism includes a rotating shaft 41, a moving contact and a stationary contact, wherein the rotating shaft 41 is rotatably assembled on the inner shell 12 close to the operating end, the rotating shaft 41 is linked with the lower connecting rod in the operating mechanism 3, the moving contact is connected to the rotating shaft 41, the stationary contact is fixed to the middle part of the inner shell 12 and is spaced opposite to the moving contact, a groove as a matching part is provided on the side of the rotating shaft 41 facing away from the moving contact, and an accessory groove is provided at one end of the inner shell 12 close to the operating end. In this embodiment, a through hole is provided at the bottom of the accessory groove, and the matching part can be exposed from the through hole.

[0041] An auxiliary switch module for outputting a pre-closing or pre-opening signal is also provided on one side of the operating mechanism 3. The auxiliary switch module is located between the inner shell 12 and the first end cover 111 between the accessory slot and the operating mechanism 3. The auxiliary switch module includes at least two micro switches 23 arranged in parallel. A first toggle member 21 is connected to the tripping shaft 31. A second toggle member 22 is rotatably provided on one side of the operating mechanism 3 and the second toggle member 22 is linked to the rotating shaft 41. Preferably, the first toggle member 21 and the second toggle member 22 are both located outside a pair of side panels, and the micro switches 23 arranged in parallel are arranged between the first toggle member 21 and the second Between the two toggle members 22, the triggering part of at least one microswitch 23 is located on the moving track of the first toggle member 21. During the closing process, the first toggle member 21 first triggers the triggering part of at least one microswitch 23, so that the auxiliary switch module outputs a pre-closing signal, and then the moving contact contacts the static contact. At least another triggering part of the microswitch 23 is located on the moving track of the second toggle member 22. During the opening process, the second toggle member 22 first triggers the triggering part of another microswitch 23 as the shaft 41 rotates to open the switch, so that the auxiliary switch outputs a pre-opening signal, and then the moving contact separates from the static contact.

[0042] Preferably, the micro switch 23 is arranged on one side of the operating mechanism 3 through a bracket 24, and two adjacent micro switches 23 are separated by a partition plate on the bracket 24. Figure 3-5 A support 24 structure applied to this embodiment is provided. The support 24 is fixed to one side of the operating mechanism 3, that is, the support 24 is arranged side by side outside a pair of side plates. The support 24 includes a first assembly groove 241 and a second assembly groove 242. Figure 5The first assembly groove 241 and the second assembly groove 242 are both rectangular grooves, and the opening of the first assembly groove 241 and the opening of the second assembly groove 242 are located on the same side of the bracket 24. In the present embodiment, the openings of the first assembly groove 241 and the second assembly groove 242 are both facing the first end cover 111, wherein the first groove bottom of the first assembly groove 241 is higher than the second groove bottom of the second assembly groove 242, so that the first groove bottom and the second groove bottom are connected to form a step surface, and a matching hole is provided in the first groove bottom so that the triggering part of the micro switch 23 is exposed from the matching hole, and the first toggle member 21 and the second toggle member 22 trigger the micro switch 23 from outside the first groove bottom; the second assembly groove 242 can be used to assemble a shunt release, or a release with other functions, or an accessory module in other circuit breakers, thereby realizing modularization.

[0043] In addition, in this embodiment, a plurality of spaced-apart partitions are provided in the first assembly groove 241 , and the space in the first assembly groove 241 is divided into a plurality of independent spaces by the partitions, so that two adjacent micro switches 23 are separated by the partitions.

[0044] Of course, the bracket 24 may not be provided, and the micro switch 23 may be directly provided at the outer end of the inner shell 12 adjacent to the operating end. The micro switch 23 may be fixed on the inner shell 12. However, this structure is not conducive to forming a modular auxiliary switch module, and the disassembly and assembly are cumbersome.

[0045] Combination Figure 2 , 4 6 provides a specific structure of the first toggle member 21 applied to the present embodiment. The first toggle member 21 includes a rod-shaped body, one end of the rod-shaped body is provided with a first connecting portion 211, and a first connecting hole (not shown) is opened on a side of the first connecting portion 211 facing the tripping shaft 31. Figure 6 In the figure, the first connecting hole is rotatably connected to one end of the tripping shaft 31 that rotates through the side plate, and the other end of the rod-shaped body is bent to form a first driving part 212 for triggering the micro switch 23, and the first driving part 212 and the first connecting part 211 are respectively located on the opposite sides of the rod-shaped body. The first driving part 212 and the first connecting part 211 make the first toggle member 21 as a whole Z-shaped, and the first driving part 212 extends outside the bottom of the first groove and is spaced opposite to the bottom of the first groove.

[0046] In this embodiment, one end of the second toggle member 22 is rotatably connected, and the other end of the second toggle member 22 is linked to the matching part of the rotating shaft 41, and the middle part of the second toggle member 22 is spaced apart from the triggering part of at least one micro switch 23. Preferably, a reset elastic member 25 is installed at one rotating end of the second toggle member 22, and the reset elastic member 25 provides a reset force for the second toggle member 22.

[0047] Combination Figure 4 , 7A specific structure of a second toggle member 22 applied to the present embodiment is provided. The second toggle member 22 includes a pair of connecting arms arranged at intervals. One end of the pair of connecting arms serves as a second connecting portion 221 and is provided with a second connecting hole. A connecting shaft is provided in the second connecting hole. The second toggle member 22 can be rotatably arranged outside the first groove bottom through the pair of connecting arms and the connecting shaft. The other ends of the pair of connecting arms are connected together to form a second driving portion 222. The second driving portion 222 is spaced relative to the first groove bottom and is used to trigger the micro switch 23. The second driving portion 222 is connected to a curved arm, which serves as a linkage portion 223 and is linked to the rotating shaft 41. Figure 7 In the figure, one end of one of the connecting arms extends in parallel and then deflects in a direction away from the second driving part 222 to form a linkage part 223. The end of the linkage part 223 is a cone with a gradually decreasing width, which facilitates the linkage part 223 to extend into the accessory slot and be plugged into the matching part.

[0048] Furthermore, a torsion spring serving as a reset elastic member 25 is sleeved on the connecting shaft, one elastic arm of the torsion spring abuts against the second toggle member 22, and the other elastic arm abuts against a component fixed in the outer shell or a side wall of the outer shell, thereby causing the torsion spring to undergo elastic deformation to provide an elastic reset force for the second toggle member 22.

[0049] In the present embodiment, a wiring cavity is provided between the outer wall of the inner shell 12 and the inner wall of the outer shell, and one end of the wiring cavity is adjacent to the accessory slot. The wiring cavity of the present embodiment is divided into a first wiring cavity and a second wiring cavity, and the first wiring cavity and the second wiring cavity are respectively provided along the two adjacent outer walls of the inner shell 12, that is, the first wiring cavity is located between the first side wall 113 and the outer wall of the inner shell 12, and the second wiring cavity is located between the second side wall 114 and the outer wall of the inner shell 12. A circuit board of a control module can be provided in the second wiring cavity, and a micro switch 23 of an auxiliary switch device can be connected to the circuit board. Preferably, a wiring board 115 is provided in the second wiring cavity, and a plurality of spaced-apart wire positioning portions are provided on the side of the wiring board 115 facing the outer shell. For example, two columns of spaced-apart wire positioning portions are provided on the wiring board 115, and the two columns of wire positioning portions are respectively provided along two sides of the wiring board 115 and are staggered relative to each other.

[0050] Of course, the outer shell may not be provided with the inner shell 12, and the circuit breaker pole and the auxiliary switch module may be directly assembled, but it is not conducive to forming a modular structure in the outer shell, which causes inconvenience in assembly and disassembly. In addition, each circuit breaker pole may also be provided with an arc extinguishing system, a short circuit protection mechanism and an overload protection mechanism, and the specific structure thereof may refer to the prior art, and the short circuit protection mechanism may trigger the operating mechanism 3 to trip by driving the traction rod to rotate.

[0051] It should be noted that in the description of the present invention, the terms "upper", "lower", "left", "right", "inner", "outer", etc. indicate directions or positional relationships based on directions or positional relationships shown in the drawings, or directions or positional relationships that are usually placed when in use, and are only for the convenience of description, rather than indicating that the device or element referred to must have a specific direction, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish descriptions, and cannot be understood as indicating relative importance.

[0052] The above contents are further detailed descriptions of the present invention in combination with specific preferred implementations, and the specific implementation of the present invention cannot be considered to be limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as falling within the protection scope of the present invention.

Claims

1. A circuit breaker, comprising a housing, wherein an operating mechanism (3) and at least one circuit breaker pole are arranged in the housing, wherein the operating mechanism (3) comprises a pair of spaced side plates, wherein a rocker arm is rotatably mounted on the pair of side plates, wherein a tripping shaft (31) and a locking shaft are rotatably mounted between the pair of side plates, wherein a tripping shaft (31) is connected to a tripping shaft (32), wherein a locking shaft is connected to a locking shaft, wherein the tripping shaft (32) and the locking shaft are snap-fitted with each other, wherein the circuit breaker pole comprises a contact mechanism, wherein the contact mechanism comprises a rotating shaft (41), a moving contact and a stationary contact, wherein a connecting rod assembly is connected between the tripping shaft (32) and the rotating shaft (41), wherein a rocker arm spring is connected between the rocker arm and the connecting rod assembly, wherein the moving contact is connected to the rotating shaft (41) and cooperates with the stationary contact, wherein an auxiliary switch module for outputting a pre-closing or pre-opening signal is further arranged in the housing, wherein: The auxiliary switch module comprises at least two micro switches (23) arranged in parallel, wherein during a closing process, at least one micro switch (23) is triggered by a tripping shaft (31) before a moving contact contacts a stationary contact, and during an opening process, at least another micro switch (23) is triggered by a rotating shaft (41) before a moving contact separates from a stationary contact.

2. The circuit breaker according to claim 1, characterized in that: The tripping shaft (31) is connected to a first toggle member (21), a second toggle member (22) is rotatably provided on one side of the operating mechanism (3), the second toggle member (22) is linked to the rotating shaft (41), the triggering part of at least one micro switch (23) is located on the moving track of the first toggle member (21), and the triggering part of at least another micro switch (23) is located on the moving track of the second toggle member (22).

3. The circuit breaker according to claim 2, characterized in that: The micro switch (23) is arranged between the first toggle member (21) and the second toggle member (22).

4. The circuit breaker according to claim 2, characterized in that: One end of the second toggle member (22) is rotatably connected and equipped with a reset elastic member (25), and the other end of the second toggle member (22) is linked to the matching part of the rotating shaft (41), and the middle part of the second toggle member (22) is spaced apart from the triggering part of at least one micro switch (23).

5. The circuit breaker according to claim 2, characterized in that: The first toggle member (21) comprises a rod-shaped body, one end of the rod-shaped body is provided with a first connecting portion (211), the first connecting portion (211) is provided with a first connecting hole, the first connecting hole is connected to the tripping shaft (31), the other end of the rod-shaped body is bent to form a first driving portion (212) for triggering the micro switch (23), and the first driving portion (212) and the first connecting portion (211) are respectively located on opposite sides of the rod-shaped body.

6. The circuit breaker according to claim 2, characterized in that: The second toggle member (22) comprises a pair of connecting arms arranged at intervals, one end of the pair of connecting arms being provided with a second connecting hole as a second connecting portion (221), a connecting shaft being connected between the pair of second connecting holes, a reset elastic member (25) being sleeved on the connecting shaft, the other ends of the pair of connecting arms being connected together to form a second driving portion (222), the second driving portion (222) being connected with a bent arm, the bent arm being connected to the rotating shaft (41) in a linkage manner as a linkage portion (223).

7. The circuit breaker according to claim 2, characterized in that: One end of the shell is provided with an operating hole as an operating end, and a connecting piece connected to the operating mechanism (3) extends out of the shell from the operating hole. An inner shell (12) is also provided inside the shell, and the micro switch (23) is provided at an outer end of the inner shell (12) adjacent to the operating end.

8. The circuit breaker according to claim 7, characterized in that: An attachment groove is provided at one end of the inner shell (12) close to the operating end, and the linkage portion (223) of the second toggle member (22) extends into the attachment groove and is linked to the matching portion of the rotating shaft (41).

9. The circuit breaker according to claim 8, characterized in that: A wiring cavity is reserved between the inner shell (12) and the outer shell, one end of the wiring cavity is adjacent to the accessory slot, and a wiring board (115) is arranged in the wiring cavity.

10. The circuit breaker according to claim 1, characterized in that: A bracket (24) is fixed on one side of the operating mechanism (3), the micro switches (23) are arranged on the bracket (24), and two adjacent micro switches (23) are separated by a partition plate on the bracket (24).

11. The circuit breaker according to claim 10, characterized in that: The bracket (24) comprises a first assembly groove (241) and a second assembly groove (242); an opening of the first assembly groove (241) and an opening of the second assembly groove (242) are located on the same side of the bracket (24); a first groove bottom of the first assembly groove (241) is higher than a second groove bottom of the second assembly groove (242), so that the first groove bottom and the second groove bottom are connected to form a step surface; a matching hole is provided at the first groove bottom, and a trigger portion of the micro switch (23) is exposed from the matching hole.

Images