Circuit breaker

Abstract

The utility model discloses a circuit breaker, which belongs to the technical field of low-voltage electrical appliances, and comprises a base, a contact assembly and a micro-motion assembly, and the base is provided with a phase line channel; the contact assembly and the micro-motion assembly are both arranged in the phase line channel, the micro-motion assembly and the contact assembly are arranged side by side, the contact assembly comprises a rotating shaft, and the rotating shaft rotates to enable the circuit breaker to have a switching-on state and a switching-off state; the micro-motion assembly comprises a micro-switch, a push rod and an elastic piece, the elastic piece is connected with the push rod, the elastic piece enables the push rod to have the tendency of triggering the micro-switch to rotate, the elastic piece enables the push rod to be in contact with the rotating shaft, and the rotating shaft rotates to drive the push rod to rotate. According to the circuit breaker provided by the utility model, the micro-motion assembly and the contact assembly are arranged in the phase line channel side by side along the first direction, the matching position of the push rod and the rotating shaft can be optimized, the size of the push rod is reduced, the micro-motion switch can be triggered or reset by rotating the push rod by a small angle, and the response speed is high.

Description

Technical Field

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

[0002] A low-voltage circuit breaker is a switch that can connect and disconnect not only normal load current and overload current, but also short-circuit current. A circuit breaker is usually equipped with a micro switch. During the opening and closing process of the circuit breaker, the rotating shaft of the circuit breaker will trigger or disconnect the micro switch, thereby realizing that the circuit breaker sends a signal through the auxiliary switch to display the opening and closing information of the circuit breaker.

[0003] In the prior art, the micro switch is usually located above the moving contact mechanism in the height direction of the circuit breaker base, and the shaft needs to rotate a large stroke to trigger the micro switch, and the response speed is slow. Therefore, a circuit breaker is urgently needed to solve the above technical problems. Utility Model Content

[0004] The utility model aims to provide a circuit breaker which can shorten the stroke of triggering a micro switch and has a fast response speed.

[0005] To achieve this purpose, the utility model adopts the following technical solutions:

[0006] A circuit breaker is provided, comprising:

[0007] A base, wherein a phase line channel is provided on the base, and the phase line channel is extended along a first direction;

[0008] A contact assembly is arranged in the phase line channel, and the contact assembly comprises a rotating shaft, and the rotating shaft rotates to make the circuit breaker have a closed state and an open state;

[0009] A micro-motion assembly is arranged in the phase line channel, and the micro-motion assembly and the contact assembly are arranged side by side along the first direction. The micro-motion assembly includes a micro-switch, a push rod and an elastic member. The elastic member is connected to the push rod. The elastic member enables the push rod to have a tendency to rotate toward triggering the micro-switch, and the elastic member enables the push rod to maintain contact with the rotating shaft. The rotation of the rotating shaft can drive the push rod to rotate; wherein,

[0010] In the closed state, the micro switch remains in the triggered state;

[0011] In the open state, the micro switch remains in the reset state.

[0012] Optionally, the micro-motion assembly further comprises a bracket detachably arranged in the phase line channel, and the micro-switch, the push rod and the elastic member are arranged on the bracket.

[0013] Optionally, a fixing groove is provided on the bracket, two positioning columns are provided on the bottom surface of the fixing groove, a plurality of clips are provided at the end of the fixing groove, the micro switch is arranged in the fixing groove, and the positioning columns are respectively passed through the mounting holes of the micro switch, and the clips are clipped with the micro switch.

[0014] Optionally, a fixing groove is provided on the bracket, the micro switch is arranged in the fixing groove, a first wire groove is provided on the side of the bracket facing the bottom of the base, a second wire groove connected to the phase line channel is provided at the bottom of the base, and the signal line of the micro switch is sequentially passed through the first wire groove and the second wire groove.

[0015] Optionally, the elastic member is configured as a torsion spring, an extension plate is provided on the bracket, a shaft portion is provided on the extension plate, the push rod and the elastic member are both sleeved on the shaft portion, and two ends of the elastic member are respectively abutted against the push rod and the extension plate.

[0016] Optionally, a protrusion is provided at the end of the shaft portion extending radially, a circular hole is provided on the push rod, a clearance groove for the protrusion to pass through is provided on the inner surface of the circular hole, the shaft portion passes through the circular hole, and the protrusion abuts against the side of the push rod facing away from the extension plate.

[0017] Optionally, a surrounding plate is provided in the phase line channel, and a mounting groove is formed between the surrounding plate and the inner surface of the phase line channel, the micro-motion assembly is arranged in the mounting groove, and one of the two inner side surfaces of the mounting groove arranged opposite to each other along the second direction is fitted with the bracket, and the other is fitted with the micro-switch.

[0018] Optionally, a fastener is further included, and a fixing plate is provided on the bracket, the fixing plate is overlapped on the enclosure, and the fastener passes through the fixing plate and is threadedly connected to the enclosure.

[0019] Optionally, the mounting groove is provided with a positioning hole between a side surface along the first direction toward the contact assembly and the bottom surface of the mounting groove, and the bracket is provided with a positioning plate corresponding to the positioning hole, and the positioning plate is inserted into the positioning hole.

[0020] Optionally, the rotating shaft is provided with a push portion, the push portion comprising an action arc surface and a retaining arc surface connected to the action arc surface; wherein,

[0021] The rotating shaft can contact the push rod through the action arc surface to drive the push rod to rotate;

[0022] The rotating shaft can contact the push rod through the retaining arc surface, so that the micro switch remains in a reset state.

[0023] Beneficial effects:

[0024] In the circuit breaker provided by the utility model, the micro-motion assembly and the contact assembly are arranged side by side in the phase line channel along the first direction, so that the distance between the micro-motion assembly and the contact assembly can be shortened, the matching position of the push rod and the rotating shaft can be optimized, the size of the push rod can be reduced, and the push rod can be driven to rotate by the rotation of the rotating shaft. The push rod can trigger or reset the micro switch by rotating a small angle, that is, the stroke of the push rod triggering the micro switch is shortened, and the response speed is fast. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural schematic diagram of the circuit breaker provided by the utility model;

[0026] Figure 2 It is a schematic diagram of a part of the structure of the circuit breaker provided by the utility model;

[0027] Figure 3 It is a partial structural enlarged schematic diagram of the circuit breaker provided by the utility model;

[0028] Figure 4 It is a structural schematic diagram of the micro-motion assembly provided by the utility model;

[0029] Figure 5 It is a structural schematic diagram of the bracket provided by the utility model;

[0030] Figure 6 It is a structural schematic diagram of the push rod provided by the utility model;

[0031] Figure 7 It is an enlarged schematic diagram of the local structure of the base provided by the utility model;

[0032] Figure 8 It is a partial cross-sectional view of the base provided by the utility model;

[0033] Fig. 9 It is another partial structural schematic diagram of the circuit breaker provided by the utility model.

[0034] In the figure:

[0035] 100, base; 101, phase line channel; 102, second line duct; 110, enclosure; 111, mounting groove; 112, groove; 113, step groove; 114, second notch; 115, positioning groove; 1151, threaded hole; 116, positioning hole; 120, partition; 121, opening groove;

[0036] 200, contact assembly; 210, rotating shaft; 211, pushing portion; 2111, action arc surface; 2112, holding arc surface; 220, moving contact; 230, double torsion spring;

[0037] 300, micro-motion assembly; 310, micro-switch; 311, mounting hole; 312, contact foot; 320, push rod; 321, arc-shaped concave surface; 322, convex block; 323, round hole; 324, clearance groove; 330, elastic member; 340, bracket; 341, fixing groove; 3411, first notch; 342, positioning column; 343, buckle; 344, fixing block; 345, first wire groove; 346, extension plate; 347, shaft; 3471, protrusion; 348, fixing plate; 349, positioning plate;

[0038] 400, static contact;

[0039] 500. Arc extinguishing assembly. DETAILED DESCRIPTION

[0040] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0041] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0042] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0043] In the description of this embodiment, the terms "upper", "lower", "right", etc., are based on the directions or positions shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0044] Reference Figure 1 and Figure 2 As shown, this embodiment provides a circuit breaker, which includes a base 100 , a contact assembly 200 and a micro-motion assembly 300 .

[0045] Specifically, a phase line channel 101 is provided on the base 100, and the phase line channel 101 is extended along the first direction; the contact assembly 200 is arranged in the phase line channel 101, and the contact assembly 200 includes a rotating shaft 210, and the rotating shaft 210 rotates to make the circuit breaker have a closed state and an open state; the micro-motion assembly 300 is arranged in the phase line channel 101, and the micro-motion assembly 300 and the contact assembly 200 are arranged side by side along the first direction, and the micro-motion assembly 300 includes a micro switch 310, a push rod 320 and an elastic member 330, and the elastic member 330 is connected to the push rod 320, and the elastic member 330 makes the push rod 320 have a tendency to rotate toward triggering the micro switch 310, and the elastic member 330 keeps the push rod 320 in contact with the rotating shaft 210, and the rotation of the rotating shaft 210 can drive the push rod 320 to rotate. Among them, in the closed state, the micro switch 310 maintains a triggered state; in the open state, the micro switch 310 maintains a reset state. in, Figure 1 The a direction in the figure is the first direction, and the first direction may be the length direction of the base 100 .

[0046] Exemplarily, when the rotating shaft 210 rotates and switches from the closed state to the open state, the rotating shaft 210 pushes the first end of the push rod 320 and forces the push rod 320 to rotate, and the second end of the push rod 320 rotates toward the micro switch 310 and triggers the micro switch 310.

[0047] Exemplarily, when the rotating shaft 210 rotates and switches from the open state to the closed state, the rotating shaft 210 gives way to the first end of the push rod 320. Under the action of the elastic member 330, the push rod 320 rotates, and the first end of the push rod 320 is tightly against the rotating shaft 210, and the second end of the push rod 320 gives way to the micro switch 310 until the micro switch 310 is reset.

[0048] In this embodiment, the micro-motion assembly 300 and the contact assembly 200 are arranged side by side in the phase line channel 101 along the first direction, which can shorten the distance between the micro-motion assembly 300 and the contact assembly 200, optimize the matching position of the push rod 320 and the rotating shaft 210, reduce the size of the push rod 320, and drive the push rod 320 to rotate by the rotation of the rotating shaft 210. The push rod 320 can trigger or reset the micro switch 310 by rotating a smaller angle, that is, shorten the stroke of the push rod 320 to trigger the micro switch 310, and the response speed is fast.

[0049] In this embodiment, refer to Figure 2 As shown, the rotating shaft 210 is provided with a push portion 211, and the push portion 211 includes an action arc surface 2111 and a retaining arc surface 2112 connected to the action arc surface 2111. The rotating shaft 210 can contact the push rod 320 through the action arc surface 2111 to drive the push rod 320 to rotate; the rotating shaft 210 can contact the push rod 320 through the retaining arc surface 2112 to keep the micro switch 310 in a reset state. The push portion 211 is arranged in an arc shape, which effectively prevents the transmission between the rotating shaft 210 and the push portion 211 from being stuck.

[0050] Exemplarily, the first end of the push rod 320 is provided with an arc-shaped concave surface 321, and the arc-shaped concave surface 321 is tangent to the retaining arc surface 2112. In this embodiment, when the rotating shaft 210 rotates, the arc-shaped concave surface 321 and the retaining arc surface 2112 move relative to each other, but the push rod 320 does not rotate, which effectively prevents the push rod 320 from abutting against the inner surface of the phase line channel 101 and effectively improves the service life of the elastic member 330.

[0051] In this embodiment, refer to Figures 3 to 5 As shown, the micro-motion assembly 300 further includes a bracket 340 detachably disposed in the phase line channel 101, and a micro-switch 310, a push rod 320, and an elastic member 330 are disposed on the bracket 340. In this embodiment, the micro-switch 310, the push rod 320, and the elastic member 330 can be assembled on the bracket 340 first, and then the entire micro-motion assembly 300 can be assembled in the phase line channel 101, which is convenient for assembly.

[0052] Specifically, the bracket 340 is provided with a fixing groove 341, and the micro switch 310 is arranged in the fixing groove 341, so as to facilitate the fixing of the micro switch 310. Exemplarily, the fixing groove 341 can be arranged on one side of the bracket 340 along the second direction. Figure 1 The b direction in the figure is the second direction, and the second direction may be the width direction of the base 100 .

[0053] Specifically, the micro switch 310 is provided with two mounting holes 311, two positioning posts 342 are provided on the bottom surface of the fixing groove 341, and a plurality of buckles 343 are provided at the end of the fixing groove 341. The micro switch 310 is arranged in the fixing groove 341, and the positioning posts 342 are correspondingly arranged in the mounting holes 311 of the micro switch 310 one by one. The buckles 343 are engaged with the micro switch 310 to realize the connection between the micro switch 310 and the bracket 340, which is convenient, stable and reliable. Exemplarily, there are two buckles 343 and they are respectively arranged on the opposite sides of the bracket 340 along the third direction. Among them, Figure 1 The c direction in the figure is the third direction, and the third direction may be the height direction of the base 100 .

[0054] Specifically, the micro switch 310 is provided with three contact pins 312 for electrically connecting the signal line. The bottom of the fixing slot 341 is provided with a fixing block 344 between two adjacent contact pins 312 of the micro switch 310 to limit the micro switch 310 and effectively prevent the positioning column 342 from breaking.

[0055] Specifically, a first wire groove 345 is provided on one side of the bracket 340 facing the bottom of the base 100, and a second wire groove 102 connected to the phase line channel 101 is provided at the bottom of the base 100. The signal line of the micro switch 310 is sequentially passed through the first wire groove 345 and the second wire groove 102 to facilitate the routing of the signal line.

[0056] In a possible implementation, Figures 4 to 6 As shown, the elastic member 330 is configured as a torsion spring, an extension plate 346 is provided on the bracket 340, a shaft 347 is provided on the extension plate 346, the push rod 320 and the elastic member 330 are both sleeved on the shaft 347, and the two ends of the elastic member 330 are respectively abutted against the push rod 320 and the extension plate 346. In this embodiment, the elastic member 330 is placed between the push rod 320 and the extension plate 346. During assembly, the elastic member 330 is pressed by the push rod 320 to facilitate the assembly of the micro-motion assembly 300 in the phase line channel 101. Of course, the elastic member 330 can also be configured as a tension spring or other elastic member 330, which is not limited in this application.

[0057] Exemplarily, a protrusion 322 is provided on the side of the second end of the push rod 320 facing the extension plate 346 , and the protrusion 322 is used to limit the spring arm of the torsion spring.

[0058] Exemplarily, the bottom surface of the fixing groove 341 extends toward the contact assembly 200 along the first direction to form an extension plate 346, so that the push rod 320 is closer to the rotating shaft 210. In this embodiment, exemplarily, a first notch 3411 is provided on one side of the fixing groove 341 along the first direction toward the contact assembly 200 to form a gap so that the second end of the push rod 320 can trigger the micro switch 310.

[0059] For example, a protrusion 3471 is provided at the end of the shaft portion 347 along the radial direction, a circular hole 323 is provided on the push rod 320, and a clearance groove 324 for the protrusion 3471 to pass through is provided on the inner surface of the circular hole 323, and the shaft portion 347 passes through the circular hole 323, and the protrusion 3471 abuts against the side of the push rod 320 that is away from the extension plate 346. In this embodiment, during assembly, the protrusion 3471 is first aligned with the clearance groove 324 and the shaft portion 347 is passed through the circular hole 323, and then the push rod 320 is rotated to cause a misalignment between the protrusion 3471 and the clearance groove 324, and the assembly between the push rod 320 and the bracket 340 is completed. In addition, within the angle range of the rotation shaft 210 driving the push rod 320 to rotate, the protrusion 3471 and the clearance groove 324 remain misaligned, and the protrusion 3471 blocks the push rod 320 to prevent the push rod 320 from being separated from the shaft portion 347.

[0060] In this embodiment, refer to Figure 3 and Figure 7 As shown, a surrounding plate 110 is provided in the phase line channel 101, and a mounting groove 111 is formed between the surrounding plate 110 and the inner surface of the phase line channel 101, and a micro-motion assembly 300 is arranged in the mounting groove 111, and one of the two inner side surfaces of the mounting groove 111 that are relatively arranged along the second direction is fitted with the bracket 340, and the other is fitted with the micro-switch 310 to realize the positioning of the micro-switch 310 along the second direction, so as to effectively prevent the micro-switch 310 from shaking and affecting the triggering effect.

[0061] Specifically, a groove 112 is provided on the side of the mounting groove 111 that is in contact with the micro switch 310 along the second direction to give way to the buckle 343. Further, a stepped groove 113 is provided on the side of the mounting groove 111 that is in contact with the micro switch 310 along the second direction. The stepped groove 113 is located on the side of the groove 112 that is in contact with the contact assembly 200 along the first direction. The stepped groove 113 is provided to give way to the second end of the push rod 320 to prevent the push rod 320 from contacting and rubbing with the side of the mounting groove 111.

[0062] Specifically, a second notch 114 is provided on one side of the enclosure 110 along the first direction toward the contact assembly 200 to form a gap so that the second end of the push rod 320 can trigger the micro switch 310 .

[0063] In a feasible embodiment, the circuit breaker further includes a fastener (not shown), a fixing plate 348 is provided on the bracket 340, the fixing plate 348 is overlapped on the enclosure 110, the fastener passes through the fixing plate 348 and is threadedly connected to the enclosure 110 to fix the bracket 340, thereby facilitating the assembly of the bracket 340 on the base 100.

[0064] Illustratively, the fastener may be a bolt.

[0065] Exemplarily, a positioning groove 115 is provided on the top of the enclosure 110, a threaded hole 1151 is provided on the bottom surface of the positioning groove 115, and a fastener is threadedly connected to the threaded hole 1151. In this embodiment, the positioning groove 115 can facilitate the positioning of the bracket 340, and can limit the bracket 340, so that the bracket 340 is more firmly fixed on the base 100.

[0066] In a possible implementation, Figure 5 , Figure 7 and Figure 8 As shown, the mounting groove 111 is provided with a positioning hole 116 between a side surface facing the contact assembly 200 along the first direction and the bottom surface of the mounting groove 111, and the bracket 340 is provided with a positioning plate 349 corresponding to the positioning hole 116, and the positioning plate 349 is inserted into the positioning hole 116, which facilitates the positioning and assembly of the bracket 340 while making the connection between the bracket 340 and the base 100 more stable and reliable, and effectively preventing the bracket 340 from tilting. Among them, the extension plate 346 extends along one side of the first direction to form the positioning plate 349.

[0067] In this embodiment, refer to Figure 1 , Figure 8 and Fig. 9 As shown, the contact assembly 200 also includes a moving contact 220 arranged on the rotating shaft 210, and a stationary contact 400 is provided in the phase line channel 101. The moving contact 220 is driven to rotate by the rotating shaft 210 to make the moving contact 220 contact or separate with the stationary contact 400, thereby realizing the closing or opening of the circuit breaker.

[0068] Specifically, a double torsion spring 230 may be disposed between the rotating shaft 210 and the moving contact 220 to ensure that the contact between the moving contact 220 and the stationary contact 400 is stable and reliable.

[0069] Specifically, an arc extinguishing assembly 500 composed of a plurality of arc extinguishing grids may be provided at the stationary contact 400 of the phase line channel 101 to achieve a good arc extinguishing effect.

[0070] Exemplarily, the base 100 is provided with a plurality of phase line channels 101 spaced apart along the second direction, and each phase line channel 101 is provided with a group of moving contacts 220, a stationary contact 400 and an arc extinguishing assembly 500. The plurality of moving contacts 220 are all provided on the rotating shaft 210, and the micro-movement assembly 300 is provided in one of the phase line channels 101. Specifically, adjacent phase line channels 101 are separated by a partition 120, and an open groove 121 is provided on the partition 120, and the rotating shaft 210 is rotatably arranged in the open groove 121, wherein the groove bottom surface of the open groove 121 is arc-shaped, and the peripheral cross-section of the rotating shaft 210 and the open groove 121 is arc-shaped, so as to realize the rotation connection between the rotating shaft 210 and the base 100.

[0071] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the scope of protection of the present invention. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the scope of protection of the claims of the present invention.

Claims

1. A circuit breaker, characterized in that: include: A base (100), wherein a phase line channel (101) is provided on the base (100), and the phase line channel (101) is extended along a first direction; A contact assembly (200) is arranged in the phase line channel (101), the contact assembly (200) comprising a rotating shaft (210), and the rotating shaft (210) rotates to enable the circuit breaker to have a closed state and an open state; A micro-motion assembly (300) is arranged in the phase line channel (101), and the micro-motion assembly (300) and the contact assembly (200) are arranged side by side along a first direction. The micro-motion assembly (300) comprises a micro-switch (310), a push rod (320) and an elastic member (330). The elastic member (330) is connected to the push rod (320). The elastic member (330) enables the push rod (320) to have a tendency to rotate toward triggering the micro-switch (310). The elastic member (330) enables the push rod (320) to maintain contact with the rotating shaft (210). The rotation of the rotating shaft (210) can drive the push rod (320) to rotate; wherein, In the closed state, the micro switch (310) remains in a triggered state; In the open state, the micro switch (310) remains in the reset state.

2. The circuit breaker according to claim 1, characterized in that: The micro-motion assembly (300) further comprises a bracket (340) detachably arranged in the phase line channel (101), and the micro-switch (310), the push rod (320) and the elastic member (330) are arranged on the bracket (340).

3. The circuit breaker according to claim 2, characterized in that: The bracket (340) is provided with a fixing groove (341), two positioning columns (342) are provided on the bottom surface of the fixing groove (341), a plurality of buckles (343) are provided at the end of the fixing groove (341), the micro switch (310) is arranged in the fixing groove (341), and the positioning columns (342) are respectively passed through the mounting holes (311) of the micro switch (310), and the buckles (343) are buckled with the micro switch (310).

4. The circuit breaker according to claim 2, characterized in that: The bracket (340) is provided with a fixing groove (341), the micro switch (310) is arranged in the fixing groove (341), a first wire groove (345) is provided on one side of the bracket (340) facing the bottom of the base (100), a second wire groove (102) connected to the phase line channel (101) is provided at the bottom of the base (100), and a signal line of the micro switch (310) is sequentially passed through the first wire groove (345) and the second wire groove (102).

5. The circuit breaker according to claim 2, characterized in that: The elastic member (330) is configured as a torsion spring, an extension plate (346) is provided on the bracket (340), a shaft (347) is provided on the extension plate (346), the push rod (320) and the elastic member (330) are both sleeved on the shaft (347), and two ends of the elastic member (330) are respectively abutted against the push rod (320) and the extension plate (346).

6. The circuit breaker according to claim 5, characterized in that: A protrusion (3471) is radially extended at the end of the shaft portion (347), a circular hole (323) is provided on the push rod (320), and a clearance groove (324) for the protrusion (3471) to pass through is provided on the inner surface of the circular hole (323), the shaft portion (347) passes through the circular hole (323), and the protrusion (3471) abuts against the side of the push rod (320) facing away from the extension plate (346).

7. The circuit breaker according to claim 2, characterized in that: A panel (110) is provided in the phase line channel (101), a mounting groove (111) is formed between the panel (110) and the inner surface of the phase line channel (101), the micro-switch assembly (300) is arranged in the mounting groove (111), and one of two inner side surfaces of the mounting groove (111) arranged opposite to each other along the second direction is fitted with the bracket (340), and the other is fitted with the micro-switch (310).

8. The circuit breaker according to claim 7, characterized in that: It also includes a fastener, wherein a fixing plate (348) is provided on the bracket (340), the fixing plate (348) is overlapped on the enclosure (110), and the fastener passes through the fixing plate (348) and is threadedly connected to the enclosure (110).

9. The circuit breaker according to claim 7, characterized in that: The mounting groove (111) is provided with a positioning hole (116) between a side surface along the first direction toward the contact assembly (200) and the bottom surface of the mounting groove (111); the bracket (340) is provided with a positioning plate (349) corresponding to the positioning hole (116); and the positioning plate (349) is inserted into the positioning hole (116).

10. The circuit breaker according to any one of claims 1 to 9, characterized in that: The rotating shaft (210) is provided with a push portion (211), and the push portion (211) comprises an action arc surface (2111) and a retaining arc surface (2112) connected to the action arc surface (2111); wherein: The rotating shaft (210) can contact the push rod (320) through the action arc surface (2111) to drive the push rod (320) to rotate; The rotating shaft (210) can contact the push rod (320) through the retaining arc surface (2112), so that the micro switch (310) remains in a reset state.

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