Manual emergency opening device for circuit breaker and circuit breaker

Abstract

The utility model provides a manual emergency opening device for a circuit breaker and the circuit breaker. The circuit breaker is provided with a trigger used for switching on and switching off, the manual emergency switching-off device comprises a fixed sleeve which is provided with a sleeve through hole, the sleeve through hole comprises a first section and a second section, and a step part between the first section and the second section forms a spring support; the actuating rod can move between an initial position and a triggering position along the sleeve through hole, in the initial position, the actuating rod does not act on the trigger, and in the triggering position, the actuating rod triggers the trigger to open the circuit breaker; and the spring piece is arranged on the periphery of the actuating rod, the first spring end abuts against the spring positioning part of the actuating rod, and the second spring end abuts against the spring support, so that when the actuating rod moves from the initial position to the triggering position, the spring piece is compressed, and when the actuating rod is released, the spring piece enables the actuating rod to return to the initial position. The opening device is simple in structure, convenient to assemble and safe to operate.

Description

Technical Field

[0001] This application relates to the field of switching equipment for electrical systems. Specifically, this application relates to a manual emergency tripping device for a circuit breaker and a circuit breaker. Background Technology

[0002] A manual circuit breaker is a device used to disconnect a circuit manually in an emergency. It is commonly used in high-voltage switchgear to ensure rapid circuit disconnection in the event of power loss or malfunction, thus protecting equipment and personnel. Existing emergency manual circuit breakers generally use tripping coils, which are complex in structure and expensive. Utility Model Content

[0003] The purpose of this utility model is to solve the problems of complex structure and high price of emergency tripping devices in the prior art. This application aims to provide a manual emergency tripping device for circuit breakers, which has a simple structure, is easy to assemble and has a low cost.

[0004] According to one aspect of the embodiments of this application, a manual emergency tripping device for a circuit breaker is provided, the circuit breaker having a trigger for closing and opening the circuit breaker. Specifically, the manual emergency tripping device includes: a fixed sleeve fixedly mounted relative to the trigger, the fixed sleeve having a sleeve through-hole forming therein, the sleeve through-hole including a first section and a second section, the diameter of the first section being larger than the diameter of the second section, the second section leading to the trigger, and a step portion between the first section and the second section forming a spring support; and an actuating rod positioned in the sleeve through-hole of the fixed sleeve and extending toward the trigger, the actuating rod being axially capable along the sleeve through-hole between an initial position and a triggered position. In the initial position, the actuating rod does not activate the trigger. In the triggered position, the actuating rod is manually moved by the operator to trigger the trigger, causing the circuit breaker to trip. The actuating rod has a spring positioning portion and a spring member sleeved on the outer periphery of the actuating rod. The spring member has a first spring end and a second spring end opposite to each other. The first spring end abuts against the spring positioning portion of the actuating rod, and the second spring end abuts against the spring support of the fixed sleeve. This allows the spring member to be compressed when the operator moves the actuating rod from the initial position to the triggered position, and the spring member's rebound force returns the actuating rod to the initial position when the operator releases the actuating rod.

[0005] In this way, the manual emergency tripping device of this application has a simple structure, is easy to assemble, and has a low cost.

[0006] According to an exemplary embodiment of this application, the manual emergency trip device further includes a pressing component adapted for manual pressing by an operator, the pressing component comprising: a columnar portion having an outer diameter greater than the outer diameter of the actuating rod, and an end of the actuating rod opposite to the trigger being fixedly mounted on one end of the columnar portion; and an insulating cap having at least partially been made of plastic material and being antistatic, the insulating cap being fixedly mounted on the other end of the columnar portion.

[0007] In this way, the manual emergency trip device of this application is very easy for the operator to operate, and the insulating cap is at least partially made of plastic material and is anti-static, which makes it safer for the operator to press it.

[0008] According to an exemplary embodiment of this application, the insulating cap has a screw portion, and the other end of the columnar portion has a first threaded hole adapted to the screw portion, so that the insulating cap and the columnar portion are installed together by a threaded connection.

[0009] In this way, the insulating cap and the columnar part are installed together by means of a threaded connection, which makes the manual emergency tripping device of this application simple to assemble and low in cost.

[0010] According to an exemplary embodiment of this application, a pair of recesses are arranged on the outer periphery of the columnar portion, the shape of which is adapted to be operated by a wrench when installing or removing the manual emergency tripping device.

[0011] In this way, the manual emergency tripping device of this application can be easily operated with a wrench during installation and removal, and is simple to operate and easy to assemble.

[0012] According to an exemplary embodiment of this application, the actuating rod is a screw member including a first end and a second end opposite to each other, the actuating rod having a first threaded section extending from the first end; and the columnar portion having a second threaded hole adapted to the first threaded section, the actuating rod and the columnar portion being fixed together by the engagement of the first threaded section and the second threaded hole.

[0013] In this way, the manual emergency tripping device of this application uses a screw component to form the actuating rod, making the structure simpler and easier to obtain, and facilitating the installation of the actuating rod and the columnar part together by means of a threaded connection, thus simplifying the assembly process.

[0014] According to an exemplary embodiment of this application, the actuating rod has a second threaded section extending from the second end; and the manual emergency tripping device further includes a nut adapted to the second threaded section, the outer diameter of the nut being larger than the diameter of the second section of the sleeve through hole of the fixing sleeve, such that when the actuating rod is in the initial position, one end face of the nut abuts against the end face of the fixing sleeve to fix the axial position of the actuating rod.

[0015] In this way, the actuator rod of the manual emergency tripping device of this application has a simple structure and is easy to obtain, and the axial positioning of the actuator rod in the initial position can be easily achieved through the cooperation of the actuator rod and the nut.

[0016] According to an exemplary embodiment of this application, the number of nuts is two, and the two nuts are screwed adjacent to each other onto the second threaded section of the actuating rod, and the fixing sleeve, the actuating rod, the columnar portion of the pressing member, and the nuts are made of aluminum or stainless steel.

[0017] In this way, the manual emergency tripping device of this application uses two nuts to more securely achieve axial positioning of the actuating rod in the initial position. The fixed sleeve, the actuating rod, the columnar part of the pressing component, and the nuts are made of aluminum or stainless steel, which has good corrosion resistance.

[0018] According to an exemplary embodiment of this application, the spring positioning portion on the actuating rod includes: a retaining ring, fixedly mounted on a groove on the outer surface of the actuating rod; and a bushing, slidably sleeved on the outer periphery of the actuating rod, the bushing including a bushing body and a bushing flange extending radially outward from the bushing body, the spring being partially sleeved on the outer periphery of the bushing body, and the first spring end abutting against the bushing flange.

[0019] In this way, the spring positioning part is realized by using circlips and bushings that are readily available on the market. This makes the spring positioning part simple in structure, easy to assemble and low in cost, while ensuring stable positioning of the spring.

[0020] According to an exemplary embodiment of this application, the circuit breaker includes a mounting plate having a first through hole facing the trigger, a fixing sleeve being fixedly mounted at the first through hole, the fixing sleeve and the trigger being located on opposite sides of the mounting plate; one end of the fixing sleeve is inserted into the first through hole, and the fixing sleeve includes a radially outwardly extending mounting flange abutting against a corresponding side of the mounting plate and being fastened to the mounting plate by a plurality of threaded members.

[0021] In this way, by utilizing the mounting flange and other features of the fixed sleeve, a stable installation of the fixed sleeve is achieved, ensuring the stability and safety of the operation of the manual emergency tripping device of this application.

[0022] According to another aspect of this application, a circuit breaker is also provided, including an electrically operated emergency tripping device, and in particular, the circuit breaker also includes any of the aforementioned manually operated emergency tripping devices for circuit breakers.

[0023] In summary, the manual emergency tripping device for circuit breakers and the related circuit breakers of this application achieve superior technical effects compared to the prior art. In particular, the manual emergency tripping device of this application has a simple structure, is easy to assemble, and has a low cost, while ensuring the safety of the operator when pressing it. Attached Figure Description

[0024] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0025] Figure 1 This is a schematic perspective view of a portion of the structure of a circuit breaker according to an exemplary embodiment of this application, including a mounting plate and a manual emergency tripping device mounted on the mounting plate;

[0026] Figure 2 This is another schematic perspective view of a portion of the structure of a circuit breaker according to an exemplary embodiment of this application, including a mounting plate and a manual emergency tripping device mounted on the mounting plate;

[0027] Figure 3 This is a schematic exploded view of a portion of the structure of a circuit breaker according to an exemplary embodiment of this application, including a mounting plate and a manual emergency tripping device mounted on the mounting plate;

[0028] Figure 4 This is a schematic cross-sectional view of a manual emergency tripping device for a circuit breaker according to an exemplary embodiment of this application;

[0029] Figure 5 This is a schematic cross-sectional view of the columnar portion of a manual emergency tripping device for a circuit breaker according to an exemplary embodiment of this application;

[0030] Figure 6 This is a schematic side view of the columnar portion of a manual emergency tripping device for a circuit breaker according to an exemplary embodiment of this application;

[0031] Figure 7 This is a schematic cross-sectional view of the fixing sleeve of a manual emergency tripping device for a circuit breaker according to an exemplary embodiment of this application;

[0032] Figure 8 This is a schematic top view of the fixing sleeve of a manual emergency tripping device for a circuit breaker according to an exemplary embodiment of this application;

[0033] Figure 9 This is a schematic front view of the actuator rod of a manual emergency tripping device for a circuit breaker according to an exemplary embodiment of this application;

[0034] Figure 10 This is a schematic cross-sectional view of a bushing for a manual emergency tripping device for a circuit breaker according to an exemplary embodiment of this application;

[0035] Figure 11 This is a schematic front view of the insulating cap of a manual emergency tripping device for a circuit breaker according to an exemplary embodiment of this application;

[0036] Figure 12 This is a schematic front view of a snap ring for a manual emergency tripping device for a circuit breaker according to an exemplary embodiment of this application.

[0037] The reference numerals in the attached figures are as follows:

[0038] 10. Columnar part

[0039] 11. First threaded hole

[0040] 12. Second threaded hole

[0041] 13. Depression

[0042] 20. Actuating rod

[0043] 21. First threaded section

[0044] 22. Second thread section

[0045] 23. Snap ring

[0046] 24. Card slot

[0047] 25. Bushing

[0048] 251. Bushing body

[0049] 252. Bushing flange

[0050] 30. Spring components

[0051] 40. Fixing sleeve

[0052] 41. Sleeve through hole

[0053] 42. First Section

[0054] 43. Second Section

[0055] 44. Install flanges

[0056] 45. Spring support

[0057] 46. ​​Bolt holes

[0058] 50. Insulating cap

[0059] 51. Screw section

[0060] 52. Press the contact part

[0061] 60. Nuts

[0062] 70. Mounting plate

[0063] 71. First through hole

[0064] 72. Second through hole

[0065] 73. Third through hole

[0066] 74. Threaded components Detailed Implementation

[0067] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present application. The nouns and pronouns related to persons in this patent application are not limited to specific genders.

[0068] Reference Figure 1 This illustration shows a schematic perspective view of a portion of the structure of a circuit breaker according to an exemplary embodiment of this application, including a mounting plate 70 and a manual emergency tripping device mounted on the mounting plate 70. The circuit breaker has a trigger for closing and opening the circuit breaker. The trigger is not shown in the accompanying drawings; it is, for example, in the form of a lever, which, when actuated, performs the tripping action. The trigger is a known component and therefore will not be described in detail herein to avoid obscuring the subject matter.

[0069] Reference Figures 1 to 3 As can be seen, the manual emergency tripping device according to one embodiment of this application mainly includes components such as a fixed sleeve 40, an actuating rod 20, a spring 30, a columnar part 10, and an insulating cap 50.

[0070] Reference Figure 3The retaining sleeve 40 is mounted on the mounting plate 70, and the retaining sleeve 40 is fixedly mounted relative to the trigger. (See reference...) Figure 7 A sleeve through hole 41 is formed in the fixed sleeve 40. The sleeve through hole 41 includes a first section 42 and a second section 43. The diameter of the first section 42 is larger than the diameter of the second section 43. The second section 43 leads to the trigger. A spring support 45 is formed at the step portion between the first section 42 and the second section 43.

[0071] Reference Figure 4 The actuating rod 20 is positioned in the sleeve through-hole 41 of the fixed sleeve 40 and extends toward the trigger. The actuating rod 20 can move axially along the sleeve through-hole 41 between an initial position and a triggered position. In the initial position, the actuating rod 20 does not act on the trigger. In the triggered position, the actuating rod 20 is manually moved by the operator to trigger the trigger, thereby tripping the circuit breaker. The actuating rod 20 has a spring-loaded positioning part. It is understood that axial movement here refers to the movement of the actuating rod 20 along the sleeve through-hole 41 in the axial direction, which is the direction of the length extension of the actuating rod and is the same direction as the extension of the central axis of the sleeve through-hole 41.

[0072] Reference Figure 4 The spring element 30 is sleeved on the outer periphery of the actuating rod 20. The spring element 30 has a first spring end and a second spring end that are opposite to each other. The first spring end abuts against the spring positioning part of the actuating rod 20, and the second spring end abuts against the spring support 45 of the fixed sleeve 40. Figure 7 The spring support 45 is shown in the figure, which causes the spring 30 to be compressed when the operator moves the actuator 20 from the initial position to the trigger position, and the spring force of the spring 30 causes the actuator 20 to return to the initial position when the operator releases the actuator 20.

[0073] Reference Figure 3 and Figure 4 As can be seen, the columnar portion 10 and the insulating cap 50 together form a pressing component suitable for manual pressing by an operator. The outer diameter of the columnar portion 10 is larger than the outer diameter of the actuator rod 20; specifically, the outer diameter of the columnar portion 10 can be in the range of 3 to 6 times the outer diameter of the actuator rod 20. For example, the outer diameter of the actuator rod 20 can be 5 mm, while the outer diameter of the columnar portion 10 can be 28 mm. The end of the actuator rod 20 opposite to the trigger is fixedly mounted to one end of the columnar portion 10. The insulating cap 50 is at least partially made of plastic material and is anti-static; the insulating cap 50 is fixedly mounted to the other end of the columnar portion 10, making it safer for the operator to press.

[0074] Reference Figure 11The insulating cap 50 may include a screw portion 51 and a pressing contact portion 52, and the other end of the columnar portion 10 has a first threaded hole 11 adapted to the screw portion 51. Figure 5 (As shown), the insulating cap 50 and the columnar portion 10 are securely mounted together by a threaded connection. During operation, the operator contacts the pressing contact portion 52, the outer surface of which may include an antistatic plastic material to improve safety.

[0075] Reference Figure 3 and Figure 6 A pair of recesses 13 are arranged on the outer periphery of the columnar portion 10. The shape of the recesses 13 is suitable for operation with a wrench when installing or removing the manual emergency tripping device. (Refer to...) Figure 5 The inner diameter of the first threaded hole 11 in the columnar portion 10 can be 10 mm, while the inner diameter of the second threaded hole 12 can be 5 mm. (Refer to...) Figure 6 The depth of each recess 13 can be, for example, 2 millimeters.

[0076] Reference Figure 9 The actuating rod 20 may be a screw member, which includes opposite first and second ends. The actuating rod 20 has a first threaded section 21 extending from the first end and a second threaded section 22 extending from the second end. The columnar portion 10 has a second threaded hole 12 adapted to the first threaded section 21. Figure 5 (As shown in the diagram), the actuating rod 20 and the columnar portion 10 are fixed together by the engagement of the first threaded section 21 with the second threaded hole 12. The total length of the actuating rod 20 can be in the range of 80 mm to 100 mm, for example, 86 mm. The length of the first threaded section 21 can be, for example, 20 mm, and the length of the second threaded section 22 can be, for example, 25 mm.

[0077] Reference Figure 4 The manual emergency tripping device also includes a nut 60 adapted to the second threaded section 22. The outer diameter of the nut 60 is larger than the diameter of the second section 43 of the sleeve through hole 41 of the fixing sleeve, so that when the actuating rod 20 is in the initial position, one end face of the nut 60 abuts against the end face of the fixing sleeve 40. Of course, a washer can be provided to fix the axial position of the actuating rod 20. There can be two nuts 60, which are screwed adjacent to each other onto the second threaded section 22 of the actuating rod 20. The fixing sleeve 40, the actuating rod 20, the columnar part 10 of the pressing component, and the nut 60 can be made of corrosion-resistant aluminum or stainless steel.

[0078] Reference Figure 4 , Figure 10 and Figure 12The spring positioning part on the actuator rod 20 includes a retaining ring 23 and a bushing 25. The retaining ring 23 is fixedly mounted on a groove 24 on the outer surface of the actuator rod 20. Figure 9 A slot 24 is shown. The distance between the slot 24 and the second end of the actuator 20 can be, for example, 57 mm.

[0079] Reference Figure 10 and Figure 4 The bushing 25 is slidably fitted on the outer periphery of the actuating rod 20. The bushing 25 includes a bushing body 251 and a bushing flange 252 extending radially outward from the bushing body 251. The spring 30 is partially fitted on the outer periphery of the bushing body 251, and the first spring end abuts against the bushing flange 252.

[0080] Reference Figure 2 The circuit breaker includes a mounting plate 70 with a first through hole 71, a second through hole 72, and a third through hole 73. The first through hole 71, the second through hole 72, and the third through hole 73 all face the trigger, allowing the trigger to be operated using corresponding tripping devices passing through the first through hole 71, the second through hole 72, and the third through hole 73. Specifically, the first through hole 71 can be used to install the manual emergency tripping device of this application, while the third through hole 73 can be used to install an electrically actuated electric tripping device, such as a tripping coil, which can operate the trigger according to an electrical signal. The second through hole 72 can be used to install a spare electric tripping device.

[0081] Reference Figure 1 and Figure 2 As can be seen, the fixing sleeve 40 is fixedly installed at the first through hole 71 of the mounting plate 70. The fixing sleeve 40 and the trigger (not shown) are located on opposite sides of the mounting plate 70. One end of the fixing sleeve 40 is inserted into the first through hole 71, and the fixing sleeve 40 includes a radially outwardly extending mounting flange 44. The mounting flange 44 abuts against the corresponding side of the mounting plate 70 and is secured by a plurality of threaded members 74. Figure 1 (As shown) It is fastened to the mounting plate 70. The threaded member 74 may include two pairs of bolts and nuts, symmetrically arranged on both sides of the mounting flange 44. From Figure 8 As can be seen, the mounting flange 44 has two bolt holes 46 for mounting the threaded component 74.

[0082] Reference Figure 7The structure of the fixing sleeve 40 can be clearly seen. The outer diameter of the mounting flange 44 of the fixing sleeve 40 can be 50 mm, and the thickness of the mounting flange 44 can be 5 mm. The distance between the surface of the mounting flange 44 facing the mounting plate 70 and the end surface of the end of the fixing sleeve 40 inserted into the first through hole 71 can be 2 mm. That is to say, the length of the portion of the fixing sleeve 40 inserted into the first through hole 71 is approximately 2 mm.

[0083] This application also includes a circuit breaker, which may include a mounting plate 70 and an electrically operated emergency tripping device (not shown). In particular, the circuit breaker also includes a manually operated emergency tripping device for a circuit breaker according to any of the above-described methods.

[0084] The manual emergency tripping device of this application is made of aluminum or stainless steel, which provides good corrosion resistance. Furthermore, the device uses a screw-type actuator 20 to connect the cylindrical part 10 to the fixed sleeve 40, creating a gap between them to allow for the compression distance of the spring 30, resulting in a larger pressing stroke. The pressing stroke can be adjusted via the screw component. An anti-static insulating cap 50 is added to the pressing point for enhanced operator safety. Moreover, the manual emergency tripping device of this application is cheaper than a coil-type device.

[0085] The above description is only a preferred embodiment of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this application, and these improvements and modifications should also be considered within the scope of protection of this application.

Claims

1. A manual emergency tripping device for a circuit breaker, the circuit breaker having a trigger for closing and opening the circuit breaker, characterized in that, The manual emergency tripping device includes: A fixed sleeve (40) is fixedly installed relative to the trigger. A sleeve through hole (41) is formed in the fixed sleeve (40). The sleeve through hole (41) includes a first section (42) and a second section (43). The diameter of the first section (42) is larger than the diameter of the second section (43). The second section (43) leads to the trigger. A spring support (45) is formed at the step portion between the first section (42) and the second section (43). An actuating rod (20) is positioned in the sleeve through-hole (41) of the fixed sleeve (40) and extends toward the trigger. The actuating rod (20) is axially movable along the sleeve through-hole (41) between an initial position and a triggered position. In the initial position, the actuating rod (20) does not act on the trigger. In the triggered position, the actuating rod (20) is manually moved by the operator to trigger the trigger, thereby tripping the circuit breaker. The actuating rod (20) has a spring-loaded positioning portion. A spring element (30) is sleeved on the outer periphery of the actuating rod (20). The spring element (30) has a first spring end and a second spring end that are opposite to each other. The first spring end abuts against the spring positioning part of the actuating rod (20), and the second spring end abuts against the spring support (45) of the fixed sleeve (40). This allows the spring element (30) to be compressed when the operator moves the actuating rod (20) from the initial position to the trigger position, and the spring force of the spring element (30) to return the actuating rod (20) to the initial position when the operator releases the actuating rod (20).

2. The manual emergency tripping device for a circuit breaker according to claim 1, characterized in that, The manual emergency tripping device further includes a pressing component suitable for manual pressing by an operator, the pressing component comprising: A columnar portion (10), the outer diameter of which is larger than the outer diameter of the actuating rod (20), and the end of the actuating rod (20) opposite to the trigger is fixedly mounted on one end of the columnar portion (10); and An insulating cap (50), which is at least partially made of plastic material and is antistatic, is fixedly mounted to the other end of the columnar portion (10).

3. The manual emergency tripping device for a circuit breaker according to claim 2, characterized in that, The insulating cap (50) has a screw portion (51), and the other end of the columnar portion (10) has a first threaded hole (11) adapted to the screw portion (51) so that the insulating cap (50) and the columnar portion (10) are installed together by a threaded connection.

4. The manual emergency tripping device for a circuit breaker according to claim 3, characterized in that, A pair of recesses (13) are arranged on the outer periphery of the columnar part (10), the shape of which is adapted to be operated by a wrench when installing or removing the manual emergency trip device.

5. The manual emergency tripping device for a circuit breaker according to claim 2, characterized in that, The actuating rod (20) is a screw member, the screw member having opposite first and second ends, and the actuating rod (20) having a first threaded section (21) extending from the first end; Furthermore, the columnar portion (10) has a second threaded hole (12) adapted to the first threaded section (21), and the actuating rod (20) and the columnar portion (10) are fixed together by the engagement of the first threaded section (21) and the second threaded hole (12).

6. The manual emergency tripping device for a circuit breaker according to claim 5, characterized in that, The actuating rod (20) has a second threaded section (22) extending from the second end; Furthermore, the manual emergency trip device also includes a nut (60) adapted to the second threaded section, the outer diameter of the nut (60) being larger than the diameter of the second section (43) of the sleeve through hole (41) of the fixed sleeve, so that when the actuating rod (20) is in the initial position, one end face of the nut (60) abuts against the end face of the fixed sleeve (40) to fix the axial position of the actuating rod (20).

7. The manual emergency tripping device for a circuit breaker according to claim 6, characterized in that, The number of nuts (60) is two, and the two nuts (60) are screwed adjacent to each other on the second thread section (22) of the actuating rod (20), and the fixing sleeve (40), the actuating rod (20), the columnar part (10) of the pressing member and the nuts (60) are made of aluminum or stainless steel.

8. The manual emergency tripping device for a circuit breaker according to any one of claims 1 to 7, characterized in that, The spring positioning part on the actuating rod (20) includes: A retaining ring (23) is fixedly mounted on a retaining groove (24) on the outer surface of the actuating rod (20); and A bushing (25) is slidably fitted on the outer periphery of the actuating rod (20). The bushing (25) includes a bushing body (251) and a bushing flange (252) extending radially outward from the bushing body (251). The spring (30) is partially fitted on the outer periphery of the bushing body (251), and the first spring end abuts against the bushing flange (252).

9. The manual emergency tripping device for a circuit breaker according to any one of claims 1 to 7, characterized in that, The circuit breaker includes a mounting plate (70) having a first through hole (71) facing the trigger, a fixing sleeve (40) being fixedly mounted at the first through hole (71), and the fixing sleeve (40) and the trigger being located on opposite sides of the mounting plate (70); One end of the fixing sleeve (40) is inserted into the first through hole (71), and the fixing sleeve (40) includes a radially outwardly extending mounting flange (44), which abuts against the corresponding side of the mounting plate (70) and is fastened to the mounting plate (70) by a plurality of threaded members (74).

10. A circuit breaker, including an electrically operated emergency tripping device, characterized in that, The circuit breaker further includes a manual emergency tripping device for the circuit breaker according to any one of claims 1 to 9.

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