A circuit breaker

Abstract

The utility model relates to a circuit breaker, wherein a tripper is arranged in a lower shell, a mounting panel is arranged on one side of the lower shell, the mounting panel is provided with an upper shell, the mounting panel is provided with a locking structure, a switching push plate, and a test button assembly, the locking structure is linked with the switching push plate, the test button assembly is linked with the tripper, and the locking structure is provided with a linkage structure for simultaneously controlling the states of the switching push plate and the test button assembly; when the locking structure is opened, the switching push plate can be normally switched on and off, and the test button assembly can be normally powered off for testing; when the locking structure is locked, the locking structure causes the test button assembly to be pressed through the linkage structure to trip the circuit breaker, the switching push plate is closed and locked, and physical power off is achieved, thereby avoiding problems caused by circuit power off and ensuring the personal safety of workers during maintenance.

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] Circuit breakers are indispensable protective components in power systems. They can not only effectively control power transmission, but also respond quickly when circuit abnormalities occur to protect personnel safety and equipment integrity. Circuit breakers can be used to manually or remotely control the connection and disconnection of circuits to achieve control of power systems. At the same time, when circuit overloads, short circuits, undervoltage and other faults occur, circuit breakers can automatically cut off power supply to protect lines from damage. Compared with fuses, circuit breakers generally do not require replacement of parts after breaking the fault current, which is convenient for maintenance and use.

[0003] The announcement number is: CN214956692U discloses an electric operating device for a circuit breaker, wherein when the switching push plate is located at the first position (second position), the electric operating device switches to a manual working state (automatic working state), and the power circuit and / or the signal circuit are disconnected (or the power circuit and / or the signal circuit are turned on); when the switching push plate is located at the second position and the locking structure switches from the unlocked state to the locked state, the locking switching push plate simultaneously drives the power circuit and / or the signal circuit to be turned off; when the switching push plate is located at the first position and the locking structure switches from the unlocked state to the locked state, the locking structure drives the switching push plate to move from the first position to the second position and locks the switching push plate, and simultaneously drives the power circuit and / or the signal circuit to be turned off; the electric operating device for the circuit breaker of the utility model ensures that when the electric operating device is locked, the circuit breaker cannot be closed by manual operation. The technology adopts the driving circuit to control the conduction and disconnection of the circuit, but there are certain safety hazards in the circuit control. For example, if a problem occurs in a certain component of the circuit, the circuit fails and the circuit breaker is automatically closed, which will cause safety hazards. Therefore, there is still a certain room for modification of the technology. Summary of the invention

[0004] The technical problem to be solved by the utility model is to provide a circuit breaker in view of the deficiencies of the above-mentioned prior art.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solution: a circuit breaker, comprising a lower shell, a trip device is arranged in the lower shell, a mounting panel is arranged on one side of the lower shell, the mounting panel is provided with an upper shell, the mounting panel is provided with a locking structure, a switching push plate, and a test button assembly, the locking structure is linked to the switching push plate, and is characterized in that: the test button assembly is linked to the trip device, and the locking structure is provided with a linkage structure for simultaneously controlling the states of the switching push plate and the test button assembly; when the locking structure is opened, the switching push plate can be normally switched on and off, and the test button assembly can be normally powered off for testing; when the locking structure is locked, the locking structure causes the test button assembly to be pressed through the linkage structure to trip the circuit breaker, and the switching push plate is closed and locked to achieve power off.

[0006] By adopting the above technical solution, the test button assembly is linked with the circuit breaker releaser, so that the test button has the function of physically tripping and disconnecting the power supply. The test button of the circuit breaker on the market is basically useless during maintenance. During maintenance, the technical locking structure is linked with the test button assembly through the linkage structure, so that the circuit breaker can be physically powered off through the locking structure, avoiding the problems caused by power outages in the circuit, and ensuring the personal safety of the staff during maintenance. At the same time, the structure can also be linked to lock the switching push plate, so that the switching push plate cannot be opened, avoiding someone from turning the main shaft of the circuit breaker electric operating device to close the switch and energize it during maintenance, further ensuring the safety of the staff.

[0007] The above-mentioned circuit breaker can be further configured as follows: the linkage structure includes a first linkage member and a second linkage member, the first linkage member is sleeved on the locking structure, the second linkage member is fixedly connected to the locking structure through a fixing component, the first linkage member is fixedly connected to the switching push plate to form a linkage groove, one side of the second linkage member is provided with a linkage block that can cooperate with the linkage groove to cause the switching push plate to move, and the second linkage member is also provided with a pressing structure that can press the linkage test button assembly when the locking structure is rotated and locked.

[0008] By adopting the above technical solution, when the rotation locking structure is locked, since the second linkage member is fixedly installed on the locking structure, the rotation of the locking structure drives the linkage to push the linkage quickly toward the linkage groove, so that the switching push plate is moved to the electric operating device, the electric operating device is turned off, and locked by the linkage block to prevent someone from going to the electric operating device during maintenance by the staff. At the same time, the second linkage member is also provided with a pressing structure. When the locking structure is rotated, the pressing structure presses the test button assembly, so that the test button assembly is linked to the circuit breaker release to physically cut off the power, and the staff can safely perform maintenance operations.

[0009] The above-mentioned circuit breaker can be further configured as follows: the pressing structure includes a pressing block arranged on one side of the linkage test button assembly, the second linkage member is provided with an inclined protrusion capable of pressing the pressing block downward, and the pressing block abuts against the inclined protrusion.

[0010] By adopting the above technical solution, the inclined protrusion provided by the second linkage part abuts against the pressing block provided by the test button assembly. When the locking structure is rotated, the inclined protrusion presses the pressing block downward, and the pressing block drives the test button assembly downward. Since the test button assembly is linked to the circuit breaker releaser, the circuit breaker can be physically tripped while the locking structure is rotated, thereby ensuring the safety of maintenance personnel during maintenance.

[0011] The above-mentioned circuit breaker can be further configured as follows: the fixing component includes a clamping end arranged at the bottom end of the locking structure, a first abutting surface is arranged around the bottom end between the locking structure and the clamping end, a first connecting cavity is arranged at one end of the second linkage member, a clamping interface for clamping the clamping end is arranged in the first connecting cavity, and an abutting groove for limiting the abutment of the first abutting surface is also arranged at the clamping interface, a second connecting cavity for installing a connecting member is arranged at one end of the second linkage member away from the first connecting cavity, the connecting member is provided with a second abutting surface in the second connecting cavity, and the connecting member is fixedly connected to the locking structure.

[0012] By adopting the above technical solution, the second linkage member is provided with a connecting cavity, and a card interface which is engaged with the locking structure is provided in the connecting cavity, so that when the locking structure rotates, it can drive the second linkage member to rotate together. The second linkage member is fixedly connected to the locking structure through a connecting member, which is convenient for installation and disassembly. The two ends of the second linkage member are respectively limited by the first abutment surface and the second abutment surface for abutment, ensuring that the second linkage member will not loosen or shift during use.

[0013] The above-mentioned circuit breaker can be further configured as follows: the test button assembly includes a button rod and a connecting rod, the button rod is movably mounted on the upper shell, the button rod sleeve is provided with an elastic member, the bottom end of the button rod is fixedly connected with the connecting rod, the pressing block is fixedly connected to the connecting rod, the connecting rod is passed through the mounting panel and extends into the lower shell, the releaser is provided with a release pressing end, and one end of the connecting rod extending into the lower shell is provided with a linkage end that abuts and links with the release pressing end.

[0014] By adopting the above technical solution, a connecting rod is provided at the bottom end of the button rod, and the connecting rod is provided with a pressing block which is linked with the locking structure. The connecting rod extends into the lower shell body and a linkage end is set to abut against the release pressing end of the release. When the locking structure is rotated, the pressing block causes the connecting rod to press the button, and the linkage end presses the release pressing end of the release to complete the release, so that the locking structure is locked, and the circuit breaker is physically tripped and the power is cut off, thereby ensuring the safety of maintenance personnel.

[0015] The above-mentioned circuit breaker can be further configured as follows: the upper shell is provided with an arc-shaped groove, and the switching push plate is provided with a limit block in the arc-shaped groove.

[0016] By adopting the above technical solution, the switching push plate is provided with a limit block, so that the switching push plate can perform circular limited movement in the arc groove of the upper shell, making the product more stable to use, and the setting of the arc groove also facilitates the linkage of the locking structure.

[0017] The above-mentioned circuit breaker may be further configured such that: the diameter of the first linkage member is larger than the diameter of the locking structure.

[0018] By adopting the above technical solution, the diameter of the first linkage member is larger than the diameter of the locking structure, so that the push plate can be easily switched between the closed / open states when the locking structure is not locked.

[0019] The above-mentioned circuit breaker can be further configured as follows: the installation panel is provided with a mounting frame, the mounting frame is installed with a status signal collector, a locking signal collector, and a test button signal collector, the switching push plate is in a closed state so that the status signal collector is pressed to transmit a signal, and when the locking structure is locked, it drives the linkage block and the locking signal collector to press and transmit a signal, and the connecting rod is provided with a third linkage part, and when the connecting rod is pressed, it drives the third connecting part to press the test button signal collector to transmit a signal.

[0020] By adopting the above technical solution, the status signal collector, the locking signal collector, and the test button signal collector can all generate linkage pressing with the corresponding linkage parts under specific conditions, and transmit the current working status signal to the host, making it convenient for operators to remotely view the current working status of the circuit breaker.

[0021] The above-mentioned circuit breaker may be further configured as follows: the locking structure comprises a lock core and a lock sleeve, and the lock core is rotatably disposed in the lock sleeve.

[0022] By adopting the above technical solution, the combination of the lock core and the lock sleeve can usually provide higher security performance. The complex mechanical structure inside the lock core is difficult to pry or destroy, thereby protecting the lock from being illegally opened. The lock sleeve serves as an outer shell, which can protect the lock core from damage by the external environment, such as water, dust and dirt, thereby extending the service life of the lock. The lock core rotates in the lock sleeve, which can ensure the stability of the entire lock body structure when locked, and prevent accidental unlocking due to vibration or external force.

[0023] The above-mentioned circuit breaker may be further configured as follows: the locking sleeve is located between the first linkage member and the second linkage member and is also sleeved with a sealing member.

[0024] By adopting the above technical solution, the seal can form an effective seal between the two parts to prevent liquid leakage, and the seal can prevent the intrusion of external dust, moisture and other impurities, protect the internal lock sleeve from contamination and damage, and improve the reliability and durability of the locking structure.

[0025] The beneficial effects of the utility model are as follows: the test button has the function of physically tripping and disconnecting the power supply. During maintenance, the technical locking structure is linked with the test button assembly through a linkage structure, so that the circuit breaker can be physically powered off through the locking structure, and the linkage switching push plate can be prevented from turning the main shaft of the circuit breaker's electric operating device to close the switch and energize it during maintenance, thereby avoiding problems caused by circuit power failure and ensuring the personal safety of the staff during maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic diagram of the structure of the utility model

[0027] Figure 2 This is the internal structure diagram of the utility model

[0028] Figure 3 This is the linkage structure diagram of the utility model

[0029] Figure 4 Exploded diagram of the linkage structure of the utility model

[0030] Figure 5 This is the internal structure diagram of the second linkage member of the utility model

[0031] Figure 6 This is the bottom structure diagram of the second linkage member of the utility model

[0032] Figure 7 This is an exploded diagram of the test button component structure of the utility model

[0033] Figure 8 This is the installation diagram of the signal collector of the utility model

[0034] In the figure, 1-lower shell, 2-tripper, 3-installation panel, 4-upper shell, 5-locking structure, 6-switching push plate, 7-test button assembly, 8-first linkage member, 9-second linkage member, 10-linkage groove, 11-linkage block, 12-pressing block, 13-inclined protrusion, 14-card connection end, 15-first abutting surface, 16-first connecting cavity, 17-card interface, 18-abutting groove, 19-second connecting cavity, 20-connecting member, 21-second abutting surface, 22-mounting frame, 23-status signal collector, 24-locking signal collector, 25-test button signal collector, 26-sealing member, 201-tripping pressing end, 401-arc groove, 501-lock cylinder, 502-lock sleeve, 601-limiting block, 701-button rod, 702-elastic member, 703-connecting rod, 704-linkage end. DETAILED DESCRIPTION

[0035] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed, but such modifications are protected by patent law as long as they are within the scope of the claims of the present invention.

[0036] like Figure 1-4The utility model provides the following technical solution: a circuit breaker, comprising a lower housing 1, a trip device 2 is arranged in the lower housing 1, a mounting panel 3 is arranged on one side of the lower housing 1, the mounting panel 3 is provided with an upper housing 4, the mounting panel 3 is provided with a locking structure 5, a switching push plate 6, and a test button assembly 7, the locking structure 5 is linked with the switching push plate 6, and is characterized in that: the test button assembly 7 is linked with the trip device 2, the locking structure 5 is provided with a linkage structure for simultaneously controlling the states of the switching push plate 6 and the test button assembly 7; when the locking structure 5 is opened, the switching push plate 6 can be normally switched on and off, and the test button assembly 7 can be normally powered off for testing;When the locking structure 5 is locked, the locking structure 5 uses the linkage structure to press the test button assembly 7 to trip the circuit breaker, switch the push plate 6 to close and lock, and realize power off. The test button assembly 7 is linked with the circuit breaker tripper 2, so that the test button has the function of physically tripping and disconnecting the power supply. The test button of the circuit breaker on the market is basically useless during maintenance. During maintenance, the locking structure 5 of this technology is linked with the test button assembly 7 through the linkage structure, so that the circuit breaker can be physically powered off through the locking structure 5, avoiding the problems caused by circuit power off, ensuring the personal safety of the staff during maintenance, and the structure can also be linked to the lock. The switching push plate 6 is fixed so that the switching push plate 6 cannot be opened, which prevents the staff from turning the main shaft of the circuit breaker electric operating device to close the switch and energize it during maintenance, further ensuring the safety of the staff. The linkage structure includes a first linkage member 8 and a second linkage member 9. The first linkage member 8 is sleeved on the locking structure 5, and the second linkage member and the locking structure 5 are fixedly installed through a fixing component. The first linkage member 8 is fixedly connected to the switching push plate 6 to form a linkage groove 10. A linkage block 11 that can cooperate with the linkage groove 10 to cause the switching push plate 6 to move is provided on one side of the second linkage member 9. The second linkage member 9 is also provided with a locking structure 5 to rotate and lock When the locking structure 5 is rotated and locked, since the second linkage member 9 is fixedly installed on the locking structure 5, the locking structure 5 rotates and drives the linkage fast push to the linkage slot 10, so that the switching push plate 6 moves to the electric operating device, turns off the electric operating device, and locks it through the linkage block 11 to prevent someone from going to the electric operating device during maintenance. At the same time, the second linkage member 9 is also provided with a pressing structure. When the locking structure 5 is rotated, the pressing structure presses the test button assembly 7, so that the test button assembly 7 is linked to the circuit breaker release 2 and physically powers off, so that the staff can safely perform maintenance operations. The pressing structure includes a pressing block 12 arranged on one side of the linkage test button assembly 7. The second linkage member 9 is provided with an inclined surface protrusion 13 capable of pressing the pressing block 12 downward. The pressing block 12 abuts against the inclined surface protrusion 13. The inclined surface protrusion 13 provided by the second linkage member 9 abuts against the pressing block 12 provided by the test button assembly 7. When the locking structure 5 is rotated, the inclined surface protrusion 13 presses the pressing block 12 downward, and the pressing block 12 drives the test button assembly 7 to be pressed downward. Since the test button assembly 7 is linked to the circuit breaker release 2, the circuit breaker can be physically tripped while the locking structure 5 is rotated, thereby ensuring the safety of the maintenance personnel during maintenance. ;

[0037] like Figure 1 and Figure 4-8A circuit breaker shown in the figure, the fixing assembly includes a clamping end 14 arranged at the bottom end of the locking structure 5, a first abutting surface 15 is arranged around the bottom end between the locking structure 5 and the clamping end 14, a first connecting cavity 16 is arranged at one end of the second linkage member 9, a clamping interface 17 for clamping the clamping end 14 is arranged in the first connecting cavity 16, and an abutting groove 18 for limiting abutment of the first abutting surface 15 is arranged at the clamping interface 17, a second connecting cavity 19 for installing a connecting member 20 is arranged at one end of the second linkage member 9 away from the first connecting cavity 16, the connecting member 20 is located in the second connecting cavity 19 and is provided with a second abutting surface 21, the connecting member 20 is fixedly connected to the locking structure 5, the second linkage member 9 is provided with a connecting cavity, and a clamping interface 17 for clamping the locking structure 5 is arranged in the connecting cavity, so that the locking structure When the structure 5 rotates, it can drive the second linkage member 9 to rotate together. The second linkage member 9 is fixedly connected to the locking structure 5 through the connecting member 20, which is convenient for installation and disassembly. The two ends of the second linkage member 9 are respectively limited and abutted by the first abutting surface 15 and the second abutting surface 21, ensuring that the second linkage member 9 will not loosen or shift during use. The test button assembly 7 includes a button rod 701 and a connecting rod 703. The button rod 701 is movably installed on the upper shell 4. The button rod 701 is sleeved with an elastic member 702. The bottom end of the button rod 701 is fixedly connected with the connecting rod 703. The pressing block 12 is fixedly connected to the connecting rod 703. The connecting rod 703 is penetrated by the installation panel 3 and extends to the lower shell 1. The releaser 2 is provided with a release pressing end 201. The connecting rod 703 extends to the lower shell 1. One end of the housing 1 is provided with a linkage end 704 that abuts and links with the release pressing end 201, and the bottom end of the button rod 701 is provided with a connecting rod 703. The connecting rod 703 is provided with a pressing block 12 that links with the locking structure 5. The connecting rod 703 extends to the lower housing 1 and is provided with a linkage end 704 that abuts with the release pressing end 201 of the releaser 2. When the locking structure 5 is rotated, the pressing block 12 causes the connecting rod 703 to press the button, and the linkage end 704 presses the release pressing end 201 of the releaser 2 to complete the tripping, forming a physical tripping and power-off of the circuit breaker when the locking structure 5 is locked, thereby ensuring the safety of maintenance personnel. The upper housing 4 is provided with an arc groove 401, and the switching push plate 6 is provided with a limit block 601 in the arc groove 401. The switching push plate 6 is provided with a limit block 601, so that the switch The push plate 6 can be moved in a circular limit position in the arc groove 401 of the upper shell 4, making the product more stable to use. The setting of the arc groove 401 is also more convenient for the linkage of the locking structure 5. The diameter of the first linkage member 8 is larger than the diameter of the locking structure 5. The diameter of the first linkage member 8 is larger than the diameter of the locking structure 5, which can facilitate the manual switching of the push plate 6 between the closed / open two different states when the locking structure 5 is not locked. The installation panel 3 is provided with a mounting frame 22, which is equipped with a status signal collector 23, a locking signal collector 24, and a test button signal collector 25. Switching the push plate 6 to the closed state causes the status signal collector 23 to press and transmit a signal. When the locking structure 5 is locked, the linkage block 11 and the locking signal collector 24 are driven to press and transmit a signal.The connecting rod 703 is provided with a third linkage member. When the connecting rod 703 is pressed, the third connecting member 20 is driven to press the test button signal collector 25 to transmit a signal. The status signal collector 23, the locking signal collector 24, and the test button signal collector 25 can all produce linkage pressing with the corresponding linkage members under a specific state, and transmit the current working state signal to the host, so that the operator can view the current working state of the circuit breaker remotely. The locking structure 5 includes a lock core 501 and a lock sleeve 502. The lock core 501 is rotatably arranged in the lock sleeve 502. The combination of the lock core 501 and the lock sleeve 502 can usually provide higher safety performance. The complex mechanical structure inside the lock core 501 is difficult to be pried open or destroyed, thereby ensuring The lock is not easily opened illegally. The lock sleeve 502, as a shell, can protect the lock core 501 from damage by the external environment, such as water, dust and dirt, and extend the service life of the lock. The lock core 501 rotates in the lock sleeve 502, which can ensure the stability of the entire lock body structure when locked, and prevent accidental unlocking due to vibration or external force. The lock sleeve 502 is located between the first linkage member 8 and the second linkage member 9 and is also provided with a seal 26. The seal 26 can form an effective seal between the two parts to prevent liquid leakage, and the seal 26 can prevent the intrusion of dust, moisture and other impurities from the outside, protect the internal lock sleeve 502 from pollution and damage, and improve the reliability and durability of the locking structure 5.

[0038] The beneficial effects of the utility model are as follows: the test button has the function of physically tripping and disconnecting the power supply. During maintenance, the technical locking structure 5 is linked with the test button assembly 7 through the linkage structure, so that the circuit breaker can be physically powered off through the locking structure 5, and can also be linked to the switching push plate 6 to avoid the staff from turning the main shaft of the circuit breaker's electric operating device to close the switch and energize it during maintenance, thereby avoiding the problems caused by circuit power failure and ensuring the personal safety of the staff during maintenance.

Claims

1. A circuit breaker, comprising a lower housing, a tripper is arranged in the lower housing, a mounting panel is arranged on one side of the lower housing, the mounting panel is provided with an upper housing, the mounting panel is provided with a locking structure, a switching push plate, and a test button assembly, the locking structure is linked to the switching push plate, and is characterized in that: The test button assembly is linked to the release, and the locking structure is provided with a linkage structure for simultaneously controlling the status of the switching push plate and the test button assembly; when the locking structure is opened, the switching push plate can be normally switched on and off, and the test button assembly can be normally powered off for testing; when the locking structure is locked, the locking structure causes the test button assembly to be pressed through the linkage structure to trip the circuit breaker, and the switching push plate is closed and locked to achieve power off.

2. A circuit breaker according to claim 1, characterized in that: The linkage structure includes a first linkage member and a second linkage member. The first linkage member is sleeved on the locking structure. The second linkage member is fixedly connected to the locking structure through a fixing assembly. The first linkage member is fixedly connected to the switching push plate to form a linkage groove. One side of the second linkage member is provided with a linkage block that can cooperate with the linkage groove to cause the switching push plate to move. The second linkage member is also provided with a pressing structure that can press the linkage test button assembly when the locking structure is rotated and locked.

3. A circuit breaker according to claim 2, characterized in that: The pressing structure comprises a pressing block arranged on one side of the linkage test button assembly, the second linkage member is provided with an inclined surface protrusion capable of pressing the pressing block downward, and the pressing block abuts against the inclined surface protrusion.

4. A circuit breaker according to claim 2, characterized in that: The fixing component includes a clamping end arranged at the bottom end of the locking structure, a first abutting surface is arranged around the bottom end between the locking structure and the clamping end, a first connecting cavity is arranged at one end of the second linkage member, a clamping interface for clamping the clamping end is arranged in the first connecting cavity, and an abutting groove for limiting the abutment of the first abutting surface is arranged at the clamping interface, a second connecting cavity for installing a connecting member is arranged at one end of the second linkage member away from the first connecting cavity, the connecting member is provided with a second abutting surface in the second connecting cavity, and the connecting member is fixedly connected to the locking structure.

5. A circuit breaker according to claim 3, characterized in that: The test button assembly includes a button rod and a connecting rod. The button rod is movably mounted on the upper shell, the button rod sleeve is provided with an elastic member, the bottom end of the button rod is fixedly connected to the connecting rod, the pressing block is fixedly connected to the connecting rod, the connecting rod is passed through the mounting panel and extends into the lower shell, the releaser is provided with a release pressing end, and one end of the connecting rod extending into the lower shell is provided with a linkage end that abuts and links with the release pressing end.

6. A circuit breaker according to claim 5, characterized in that: The upper shell is provided with an arc-shaped groove, and the switching push plate is provided with a limit block in the arc-shaped groove.

7. A circuit breaker according to claim 2, characterized in that: The diameter of the first linkage member is greater than the diameter of the locking structure.

8. A circuit breaker according to claim 5, characterized in that: The mounting panel is provided with a mounting frame, on which a status signal collector, a locking signal collector, and a test button signal collector are installed. The switching push plate to the closed state causes the status signal collector to press and transmit a signal. When the locking structure is locked, it drives the linkage block and the locking signal collector to press and transmit a signal. The connecting rod is provided with a third linkage part. When the connecting rod is pressed, it drives the third connecting part to press the test button signal collector to transmit a signal.

9. A circuit breaker according to any one of claims 1 to 4, characterized in that: The locking structure comprises a lock core and a lock sleeve, wherein the lock core is rotatably arranged in the lock sleeve.

10. A circuit breaker according to claim 9, characterized in that: The lock sleeve is located between the first linkage member and the second linkage member and is also sleeved with a sealing member.

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