Extension handle, circuit breaker assembly and electrical device

Abstract

An extended handle for operating a circuit breaker includes a transmission shaft having one end configured to be connected to the circuit breaker, and a handle module. The handle module comprises a module shell, the module shell is provided with a front face, and the front face is provided with a first opening and a second opening. A transmission mechanism having a first pivoting portion provided with an operation hole configured to accommodate an operation key, the first pivoting portion being pivotally mounted in the first opening, the first pivoting portion being coupled to the other end of the transmission shaft; the state switching piece comprises a receiving hole and a second pivoting part, the state switching piece is mounted outside the module shell, and the second pivoting part can be pivotally mounted in the second opening, so that the state switching piece can be switched among an automatic position, a manual position and a padlock position; the first sealing piece is arranged between the first opening and the first pivoting part; the second sealing piece is arranged between the second opening and the second pivoting part; and the third sealing element is arranged around the module shell.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the electrical field, in particular to an extension handle, a circuit breaker assembly comprising the extension handle and an electrical device comprising the circuit breaker assembly. BACKGROUND

[0002] Circuit breakers are common electrical devices, which are used to automatically cut off the circuit when an excessive abnormal current flows in the circuit (e.g. overload or short circuit) to protect the safety of the devices and people. For some circuit breakers, an operating handle needs to be configured to operate the circuit breaker, for example, a push handle which can be pushed up and down is configured to implement the tripping and closing operation of the circuit breaker, or a rotary handle is configured to implement the tripping and closing operation of the circuit breaker. In particular, for some circuit breakers, an electric operating mechanism is also provided, which provides power through a motor to operate the tripping and closing of the circuit breaker.

[0003] However, for some practical application scenarios, it is necessary to physically separate the operation of the circuit breaker, for example, the circuit breaker is installed inside an electrical device such as an electrical cabinet, and due to various reasons, the electrical device cannot be opened or is not frequently opened to operate the internal circuit breaker. In particular, there may be a humid environment that requires waterproof protection of the circuit breaker to ensure electrical safety, and physical separation of the operation is extremely advantageous in this scenario. In addition, since the status indication of the circuit breaker is extremely important for electrical safety, in addition to physically separating the operation of the circuit breaker, it is also necessary to physically separate the real-time indication of the status inside the circuit breaker.

[0004] Therefore, there is a need for an extension handle and a circuit breaker assembly that can solve the above problems. SUMMARY

[0005] The present disclosure aims to at least solve the drawbacks existing in the prior art, and proposes an extension handle for operating a circuit breaker, comprising a transmission shaft configured to be connected to the circuit breaker at one end, and a handle module. The handle module comprises a module housing having a front face provided with a first opening and a second opening; a transmission mechanism having a first pivot portion provided with an operation hole configured to accommodate an operation key, the first pivot portion being pivotably mounted in the first opening so that the operation key can be inserted into the operation hole from the first opening, the first pivot portion being coupled to the other end of the transmission shaft so that the transmission shaft can be driven to rotate via the transmission mechanism by rotating the operation key, and in turn switching the state of the circuit breaker; a state switching piece comprising an access hole and a second pivot portion, the state switching piece being mounted outside the module housing, and the second pivot portion being pivotably mounted in the second opening so that the state switching piece can be switched between an automatic position, a manual position and a padlock position, the state switching piece being configured to align the access hole with the first opening when switched to the manual position.

[0006] For example, according to some embodiments of the present disclosure, the handle module further comprises the first sealing member arranged between the first opening and the first pivot portion for liquid sealing; and a second sealing member arranged between the second opening and the second pivot portion for liquid sealing.

[0007] For example, according to some embodiments of the present disclosure, the handle module further comprises a third sealing member arranged around the module housing

[0008] For example, according to some embodiments of the present disclosure, the transmission mechanism is arranged so that the first pivot portion and the transmission shaft rotate synchronously.

[0009] For example, according to some embodiments of the present disclosure, the module housing is further provided with an at least partially transparent indication window, and the handle module is further provided with an indication piece provided with different indication marks, the indication piece being coupled with the transmission mechanism and being driven thereby. When the transmission shaft is pivoted by different angles, the different indication marks of the indication piece are aligned with the indication window.

[0010] For example, according to some embodiments of the present disclosure, the operation key is detachably inserted into the operation hole and / or the transmission shaft is detachably coupled to the handle module.

[0011] For example, according to some embodiments of the present disclosure, the handle module further comprises a micro switch arranged in the module housing, the micro switch is fixed to the module housing and communicatively connected to the circuit breaker, and a toggle lever coupled with the state switching piece and driven thereby. When the state switching piece is switched to the automatic position, the toggle lever is driven to switch the state of the micro switch.

[0012] For example, according to some embodiments of the present disclosure, the handle module further comprises a padlock piece arranged in the module housing, the padlock piece is capable of being at least partially withdrawn from inside the module housing through the front face, and when the padlock piece is withdrawn, the transmission mechanism is locked and unable to move, wherein when the state switching piece is switched to the padlock position, the access hole is aligned with the padlock piece, so that the padlock piece can be withdrawn.

[0013] For example, according to some embodiments of the present disclosure, the cross-sectional profile of the transmission shaft perpendicular to the axial direction is asymmetric.

[0014] The present disclosure also proposes a circuit breaker assembly comprising the extended handle of any of the preceding embodiments, and the circuit breaker.

[0015] For example, according to some embodiments of the present disclosure, the indication piece indicates the open state and the closed state of the circuit breaker.

[0016] For example, according to some embodiments of the present disclosure, when the state switching piece is switched to the automatic position, the circuit breaker is switched to an automatic operation mode.

[0017] The present disclosure also proposes an electrical device comprising a housing provided with a mounting opening, and the circuit breaker according to any of the preceding embodiments, the circuit breaker is arranged in the housing. The handle module is mounted in the mounting opening, so that the front face of the module housing is exposed outside the housing, and the third sealing piece is arranged between the mounting opening and the handle module to seal against liquid. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 A perspective schematic view showing part of the structure of an electrical device according to an embodiment of the present disclosure, wherein only one wall of the housing of the electrical device is shown for illustration;

[0019] Figure 2 A cross-sectional view showing part of the structure of an electrical device according to Figure 1 ;

[0020] Figure 3 A plan schematic view showing the front face of a module housing according to an embodiment of the present disclosure;

[0021] Figure 4Fig. 6 shows a perspective view of a part of the internal structure of the handle module according to one embodiment of the present disclosure, wherein for demonstration, the module housing is hidden;

[0022] Figure 5a Fig. 7 shows a perspective view of the state switching piece according to one embodiment of the present disclosure, Figure 5b Fig. 8 shows a perspective view of the dialing lever according to one embodiment of the present disclosure;

[0023] Figure 6a Fig. 9 shows Figure 4 Fig. 10 shows a plan view of the structure shown, wherein the state switching piece is in the automatic position; Figure 6b Fig. 11 shows a plan view of the relative positions of the dialing lever and the micro switch, wherein the state switching piece is in the automatic position;

[0024] Figure 7a Fig. 12 shows Figure 4 Fig. 13 shows a plan view of the structure shown, wherein the state switching piece is in the manual position; Figure 7b Fig. 14 shows a plan view of the relative positions of the dialing lever and the micro switch, wherein the state switching piece is in the manual position;

[0025] Figure 8a Fig. 15 shows Figure 4 Fig. 16 shows a plan view of the structure shown, wherein the state switching piece is in the padlock position; Figure 8b Fig. 17 shows a plan view of the relative positions of the dialing lever and the micro switch, wherein the state switching piece is in the padlock position;

[0026] Figure 9 Fig. 18 shows Figure 2 Fig. 19 shows an enlarged perspective view of the extended handle mounted on the housing in Fig. 18;

[0027] Figure 10 Fig. 20 shows an exploded perspective view of the module housing, the third sealing piece and the housing.

[0028] Reference signs

[0029] 1 transmission shaft,

[0030] 2 handle module, 21 module housing, 210 front face, 211 first opening, 212 second opening, 213 third opening, 214 side face, 22 transmission mechanism, 221 first pivot part, 222 operation hole, 23 state switching piece, 231 access hole, 232 second pivot part, 241 first sealing piece, 242 second sealing piece, 243 third sealing piece, 25 micro switch, 26 dialing lever, 261 dialing part, 262 rotating part, 27 padlock piece, 3 circuit breaker,

[0031] 4 housing, 41 mounting opening DETAILED DESCRIPTION

[0032] In order to make the purpose, scheme and advantages of the technical solutions of the present disclosure clearer, the technical solutions of the embodiments of the present disclosure will be described clearly and completely below in conjunction with the drawings of specific embodiments of the present disclosure. Unless otherwise specified and limited, the terms used herein have the meanings commonly understood in the art. The same reference signs in the drawings represent the same components.

[0033] In the description of the present disclosure, it should be noted that unless otherwise explicitly specified and limited, the terms “mounting”, “connection”, “connecting” should be understood broadly, for example, can be fixed connection, can also be detachable connection, or integrally connected; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be the communication inside two elements. For those skilled in the art, the specific meanings of the above terms in the present disclosure can be understood according to the specific circumstances.

[0034] The present disclosure proposes a waterproof protection solution for circuit breakers with both manual operation and automatic operation modes, which realizes the physical separation operation of the circuit breaker by configuring an extension handle.

[0035] Specifically, the present disclosure proposes an extension handle for operating a circuit breaker, a circuit breaker assembly comprising the extension handle, and an electrical device comprising the circuit breaker assembly. Figure 1 A perspective schematic view of a partial structure of an electrical device according to an embodiment of the present disclosure is shown, wherein only one wall of the housing 4 of the electrical device is shown for demonstration; Figure 2 A cross-sectional view of a partial structure of an electrical device according to Figure 1 The electrical device may, for example, be any electrical device with a circuit breaker installed inside, such as an electrical cabinet, a distribution box, etc. The electrical device comprises a housing 4, which can be provided with a mounting opening 41 for mounting the extension handle according to the present disclosure, as shown in Figure 9 The mounting opening 41, for example, matches the profile of the module housing 21 of the handle module 2. The circuit breaker 3 is arranged inside the housing 4, and in particular, is spaced apart from the mounting opening 41 by a certain distance, thereby further enhancing the waterproof protection of the circuit breaker 3.

[0036] The circuit breaker 3 can be switched between a manual operation mode or an automatic operation mode. In the manual operation mode, the operation of the circuit breaker 3 can be realized by rotating the transmission shaft 1 coupled thereto to provide power. The circuit breaker 3 can also be provided with an electrically operated mechanism, which can operate the opening and closing of the circuit breaker by providing power through a motor when the circuit breaker 3 is switched to the electric mode.

[0037] The extension handle according to the present disclosure comprises a transmission shaft 1 and a handle module 2, both ends of the transmission shaft 1 are coupled to the handle module 2 and the circuit breaker 3, respectively. In particular, asFigure 1 and Figure 2 As shown, the handle module 2 is mounted on the housing 4 of the electrical device, while the circuit breaker 3 is arranged inside the housing 4. Rotation of the drive shaft 1 enables operation of the circuit breaker 3; for example, different rotation angles of the drive shaft 1 can switch the circuit breaker 3 to different states, such as switching it to a closed or open state. This allows for physically isolated operation of the circuit breaker 3, which is beneficial for waterproof protection of the circuit breaker 3.

[0038] In particular, the drive shaft 1 is detachably mounted to the handle module 2, thereby facilitating transport and replacement. The cross-sectional profile of the drive shaft 1 perpendicular to the axial direction may have a polygonal shape to facilitate torque transmission. For example, the cross-sectional profile of the drive shaft 1 perpendicular to the axial direction may be asymmetrical, thereby preventing mistaken installation, i.e., preventing incorrect installation of the corresponding angles of the circuit breaker 3 and the indicator (described later) within the handle module 2.

[0039] Specifically, the handle module 2 according to this disclosure may include a module housing 21, a transmission mechanism 22, a state switching element 23, a micro switch 25, a lever 26, and a padlock element 27, wherein the transmission mechanism 22, the micro switch 25, the lever 26, and the padlock element 27 may be disposed inside the module housing 21, and the state switching element 23 may be disposed outside the module housing 21.

[0040] Figure 3 The diagram shows a plan view of the front side 210 of the module housing 21 according to an embodiment of the present disclosure. The front side 210 may be provided with a first opening 211, a second opening 212, and a third opening 213, for accommodating the first pivot portion 221 of the transmission mechanism 22, the second pivot portion 232 of the state switching member 23, and the padlock member 27, respectively. The front side 210 refers to the surface facing and exposed to the outside of the housing 4 when the handle module 2 is mounted on the housing 4.

[0041] Transmission mechanism 22 is used to transmit torsional motion from operating key (not shown), such as Figure 4 and Figure 6b As shown, it may have a first pivot portion 221, one end of which may be provided with an operation hole 222 configured to receive an operation key. The operation hole 222 may be polygonal, for example... Figure 6b The irregular polygon shown can thus be used to transmit torque from the operating key. One end of the first pivoting portion 221, having an operating hole 222, is pivotally mounted in the first opening 211, allowing the operating key to be inserted from the first opening 211 into the operating hole 222 to actuate the transmission mechanism. The operating key is detachably inserted into the operating hole 222.

[0042] The other end of the first pivot part 221 can be coupled to the end of the transmission shaft 1 opposite to the circuit breaker 3, in particular, the first pivot part 221 can comprise a coupling hole (not shown) conforming to the cross-sectional profile of the transmission shaft 1 perpendicular to the axial direction to accommodate the end of the transmission shaft 1. Thus, by rotating the operation key, the transmission shaft 1 can be driven to rotate via the transmission mechanism 22, and further to realize the operation of the circuit breaker 3, for example, switching the state of the circuit breaker 3.

[0043] In particular, the transmission mechanism 22 can be configured to synchronize the rotation of the first pivot part 221 and the transmission shaft 1, that is, the first pivot part 221 can drive the transmission shaft 1 to rotate synchronously, and the transmission shaft 1 can also drive the transmission shaft 1 to rotate synchronously in reverse. In particular, when the circuit breaker 3 is electrically operated, the circuit breaker 3 also drives the transmission shaft 1 to rotate, and further drives the first pivot part 221 to rotate, so that the state inside the circuit breaker can be transmitted to the handle module 2 via the transmission shaft 1 to realize real-time state indication. Specifically, the module housing 21 can also be provided with at least partially transparent indication windows (not shown), and the handle module 2 can also be provided with an indication member (not shown). The indication member can be provided with different indication marks, and the indication member is coupled with the transmission mechanism 22 and is driven. When the transmission shaft 1 is pivoted by different angles, the different indication marks of the indication member are aligned with the indication windows to indicate the state of the circuit breaker 3, for example, the closed state and the open state. Thus, the indication member can realize state indication in both manual operation mode and automatic operation mode. The extended handle according to the present disclosure can transmit the state of the internal circuit breaker to the handle module in real time, so that the operator can know the state of the internal circuit breaker through the handle module installed on the electrical device shell

[0044] As shown in Figure 4 and Figure 5a , the state switching member 23 can comprise a dialing disc for dialing, and the dialing disc is provided with an access hole 231 and a second pivot part 232, in particular, the second pivot part 232 is eccentrically arranged on the dialing disc, and the access hole 231 can be an elliptical long hole penetrating the dialing disc. The state switching member 23 can be installed outside the module housing 21, for example, the second pivot part 232 can be pivotally installed in the second opening 212 of the module housing 21 to realize the installation. The dialing disc can be manually dialed to pivot around the second pivot part 232, as shown in Figure 6a 、 7a and 8a, thereby the state switching member 23 can be switched between the automatic position, the manual position and the padlock position.

[0045] The state switching member 23 can also be configured to be switched to the manual position (as shown in Figure 7aWhen the state switching piece 23 is switched to the locked position, the access hole 231 is aligned with the first opening 211, thus in this position, the operating key can be inserted into the operating hole 222 to actuate the transmission mechanism 22 and further operate the circuit breaker via the transmission shaft 1. Conversely, when the state switching piece 23 is switched to the other position, the access hole 231 is not aligned with the first opening 211, i.e. the knob of the state switching piece 23 blocks the first opening 211, thus the operating key cannot be inserted into the operating hole 222, thus in the locked and automatic operation, manual operation cannot be performed, realizing state interlocking, ensuring safety.

[0046] Further, as shown in Figure 8a , the state switching piece 23 can also be arranged such that when it is switched to the locked position, the access hole 231 is aligned with the third opening 213, thus in this position, the padlock piece 27 can be pulled out. Specifically, the handle module 2 further comprises a padlock piece 27 arranged in the module housing 21, as shown in Figure 4 , Figure 6a and Figure 8a , at least part of the padlock piece 27 is accommodated in the third opening 213 on the front face 210, so that at least part of the padlock piece 27 can be pulled out from the inside of the module housing 21 at the third opening 213 of the front face 210. When the padlock piece 27 is pulled out, the transmission mechanism 22 is locked and cannot move, and a lock can be hung on the padlock piece 27 to keep the padlock piece 27 in the pulled-out state, thereby ensuring that the transmission mechanism 22 is locked, i.e. ensuring that the transmission shaft 1 is locked and ensuring that the circuit breaker 3 is locked (locked in the open state), thereby ensuring that the circuit is not powered, for example, which can be used when repairing or maintaining to ensure the safety of the operator.

[0047] When the state switching piece 23 is switched to the automatic position, the circuit breaker 3 is switched to the automatic operation mode, as shown in Figure 6a and Figure 6b . Specifically, the handle module 2 further comprises a micro switch 25 for communication connection with the circuit breaker 3, which can be fixed to the inside of the module housing 21, and the micro switch can be in wired or wireless communication connection with the circuit breaker 3. Thus, by switching the state of the micro switch 25 (for example, from the open state to the closed state or from the closed state to the open state), a signal can be transmitted to the circuit breaker 3, thereby switching the circuit breaker 3 to the automatic operation mode.

[0048] The micro switch 25 can be switched by another toggle lever 26, as shown in Figure 5bAs shown, the lever 26 comprises a rotating part 262 and a sector-shaped levering part 261. The lever 26 is coupled to the second pivot part 232 of the state switching member 23, for example via the rotating part 262, and rotates synchronously with the state switching member 23, for example. Thus, the lever 26 can be rotated by levering the state switching member 23. For example, as shown in Figs. 8a, 8b and 8c, the levering part 261 abuts against the micro switch 25 when the state switching member 23 is in the manual position and the lock position, so that the micro switch 25 is closed; and the levering part 261 is separated from the micro switch 25 when the state switching member 23 is in the automatic position, so that the micro switch 25 is opened. Thus, the micro switch 25 is switched when the state switching member 23 is rotated to different positions, and the signal generated thereby can be transmitted to the circuit breaker 3, so that the circuit breaker 3 can be switched between the manual operation mode and the automatic operation mode. Figure 6b 、 7b As shown in Figs. 8a, 8b and 8c, the levering part 261 abuts against the micro switch 25 when the state switching member 23 is in the manual position and the lock position, so that the micro switch 25 is closed; and the levering part 261 is separated from the micro switch 25 when the state switching member 23 is in the automatic position, so that the micro switch 25 is opened. Thus, the micro switch 25 is switched when the state switching member 23 is rotated to different positions, and the signal generated thereby can be transmitted to the circuit breaker 3, so that the circuit breaker 3 can be switched between the manual operation mode and the automatic operation mode.

[0049] The extended handle according to the present disclosure can physically and spatially control the circuit breaker inside the electrical device, and the control of the circuit breaker inside the electrical device can be achieved without opening the electrical device, which is conducive to ensuring the stability and safety of the internal structure of the electrical device; the circuit breaker can be physically and spatially separated from the environment, for example, a humid environment, which is conducive to the safety of electricity use; and the switching between manual operation and electric operation can be achieved on the handle module, in particular, the closing operation and the opening operation can be achieved on the handle module in the manual operation.

[0050] As described above, the handle module 2 is mounted to the housing 4, and the outside of the housing 4 can be a humid environment. In order to ensure that the inside of the housing of the electrical device always remains dry, the handle module 2 needs to be provided with liquid sealing. For the first opening 211 and the second opening 212, each of which accommodates the first pivot part 221 and the second pivot part 232 which can be pivotally moved, water is particularly likely to enter at these two positions. For this purpose, as shown in Figs. 9a and 9b, a first sealing member 241 can be provided between the first opening 211 and the first pivot part 221, and a second sealing member 242 can be provided between the second opening 212 and the second pivot part 232, to achieve liquid sealing, in particular, the liquid sealing can be at least IP4 level. Figure 9

[0051] Further, the position between the module housing 21 and the mounting opening 41 on the housing 5 is also a position where water is likely to enter. Thus, a third sealing member 243 needs to be provided on the side surface 214 of the module housing 21 surrounding the front surface 210, as shown in Figs. 10a and 10b, to achieve liquid sealing, in particular, the liquid sealing can be at least IP4 level. Figure 10 ​The first seal 241, the second seal 242 and the third seal 243 are arranged between the module housing 21 and the mounting opening 41, so that a liquid seal is formed between the module housing 21 and the mounting opening 41, in particular the liquid seal can be at least IP4 level. The present disclosure does not limit the specific form of the first seal 241, the second seal 242 and the third seal 243, which may, for example, be a rubber ring or other commonly used seal in the art, as long as the liquid seal function can be achieved.

[0052] The extension handle according to the present disclosure can physically separate the circuit breaker inside the electrical device, which is beneficial to physically separate the circuit breaker from the humid environment and is beneficial to the safety of electricity use; further, the extension handle is waterproof, which ensures that the inside of the electrical device is always dry and ensures the safety of electricity use; and the manual operation and the electric operation can be switched on the handle module; and the state of the internal circuit breaker can be transmitted to the handle module in real time, so that the operator can know the state of the internal circuit breaker through the handle module installed on the electrical device shell.

[0053] It should be understood that the above description is intended to explain and not limit. For example, the above-described embodiments (and / or aspects thereof) can be used in combination with each other. In addition, many modifications can be made to adapt a particular situation or material to the teachings of the present disclosure without departing from the scope thereof. The functions or performance of various elements or modules described herein are for illustration only and are by no means limiting, but are merely exemplary embodiments. After reading the above description, many other embodiments and modifications within the spirit and scope of the claims will be apparent to those skilled in the art. Therefore, the scope of the present disclosure should be determined with reference to the appended claims and the full scope of equivalents to which these claims are entitled.

[0054] In the appended claims, the terms "comprise" and "wherein" are used as simple English equivalents of the respective terms "include" and "comprising." Furthermore, in the following claims, the terms "first," "second," and "third," etc. are used merely as labels, and are not intended to impose numerical requirements on their objects.

Claims

1. An extension handle for operating a circuit breaker, comprising: The drive shaft, one end of which is configured to be connected to a circuit breaker, Handle module, including The module housing has a front side, which is provided with a first opening and a second opening. The transmission mechanism has a first pivot portion with an operating hole configured to receive an operating key. The first pivot portion is pivotally mounted in a first opening, allowing the operating key to be inserted into the operating hole from the first opening. The first pivot portion is connected to the other end of the drive shaft, such that rotating the operating key can drive the drive shaft to rotate via the transmission mechanism, thereby switching the state of the circuit breaker. A state switching element includes a receiving hole and a second pivot portion. The state switching element is mounted outside the module housing, and the second pivot portion is pivotally mounted in a second opening, such that the state switching element can switch between an automatic position, a manual position, and a padlock position. The state switching element is configured such that when switched to the manual position, the receiving hole is aligned with the first opening.

2. The extension handle according to claim 1, wherein, The transmission mechanism is configured to allow the first pivot and the transmission shaft to rotate synchronously.

3. The extension handle according to claim 2, wherein, The module housing is also provided with at least a partially transparent indicator window. The handle module is also equipped with an indicator, which has different indicator marks. The indicator is connected to and driven by the transmission mechanism. As the drive shaft pivots at different angles, different indicator marks of the indicator align with the indicator window.

4. The extension handle according to claim 1, wherein, The handle module also includes A first seal is disposed between the first opening and the first pivot portion to provide a liquid seal. A second seal is disposed between the second opening and the second pivot portion to provide a liquid seal.

5. The extension handle according to claim 4, wherein, A third seal is provided around the module housing.

6. The extension handle according to claim 1, wherein, The operating key is detachably inserted into the operating hole and / or the drive shaft is detachably connected to the handle module.

7. The extension handle according to claim 1, wherein, The handle module also includes a micro switch and a lever disposed within the module housing. The micro switch is fixed to the module housing and communicatively connected to the circuit breaker. The lever is connected to and actuated by the state switching element. When the state switching element switches to the automatic position, it drives the lever to switch the state of the micro switch.

8. The extension handle according to claim 7, wherein, The handle module also includes a padlock disposed within the module housing. The padlock is at least partially retractable from the module housing from the front. When the padlock is retracted, the transmission mechanism is locked and cannot move. When the state switching component is switched to the padlock position, the receiving hole is aligned with the padlock component, so that the padlock component can be pulled out.

9. The extension handle according to claim 1, wherein, The cross-sectional profile of the drive shaft perpendicular to the axial direction is asymmetrical.

10. A circuit breaker assembly, comprising: The extension handle according to any one of claims 1-9, The circuit breaker.

11. The circuit breaker assembly of claim 10, wherein, The indicator shows the open and closed states of the circuit breaker.

12. The circuit breaker assembly of claim 10, wherein, When the state switching element switches to the automatic position, the circuit breaker switches to automatic operation mode.

13. An electrical device comprising The outer casing has an installation opening. The circuit breaker according to any one of claims 10-12, wherein the circuit breaker is disposed in the housing. in, The handle module is installed in the mounting opening such that the front of the module housing is exposed outside the outer shell, and the third seal is disposed between the mounting opening and the handle module for liquid sealing.

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