A circuit breaker quick locking device with a password lock

Abstract

The utility model discloses a circuit breaker quick locking device with coded lock, and the circuit breaker is positioned and connected on the teaching display surface of teaching platform, the circuit breaker includes circuit breaker body and the switch rod that sets on the circuit breaker body, the locking device is positioned and connected on the teaching display surface and sets up to the circuit breaker body, the locking device includes sliding piece, coded lock and fixed sleeve, in the utility model, the cooperation of fixed sleeve, sliding piece, switch rod and coded lock can realize the operation of locking switch rod on the circuit breaker body, to reduce the risk of operation failure, different from prior art, the scheme realizes the safety interlock of circuit breaker operation through the mode that mechanical linkage and coded control are combined, and effectively avoids the teaching accident caused by misoperation.

Description

Technical Field

[0001] This utility model relates to the field of circuit breaker technology, specifically to a circuit breaker quick-locking device with a combination lock. Background Technology

[0002] Circuit breakers are crucial protection and control devices in power systems. Under normal conditions, they can close, carry, and interrupt circuit currents. In the event of abnormal conditions such as short circuits or overloads, they reliably interrupt fault currents within a specified time, thereby protecting power lines and connected electrical equipment, preventing the escalation of accidents, and ensuring the safe and stable operation of the power system. In the chain of power generation, transmission, and use, power distribution is a key link. As a widely used basic electrical appliance in power distribution systems, the performance of circuit breakers directly affects the reliability and safety of the entire power grid. From the earliest simple combination of knife switches and overcurrent trip units to today's intelligent devices with multiple protection functions including overload, short circuit, and undervoltage, the technological evolution of circuit breakers has consistently focused on improving breaking capacity, reliability, and intelligence.

[0003] In the teaching practice of electrical engineering, circuit breakers are an indispensable teaching tool. Students need to use them to gain a deep understanding of power distribution protection principles, electrical control logic, and safe operating procedures. The teaching process often involves students performing closing and opening operations of circuit breakers, identifying their structure (such as the contact system, arc extinguishing system, operating mechanism, and trip unit), and learning their coordination with disconnecting switches, fuses, and other equipment. These are crucial steps in cultivating students' engineering practice abilities. Furthermore, with technological advancements, virtual simulation teaching systems have been introduced to simulate the behavior of circuit breakers under various operating conditions, especially in dangerous scenarios such as high voltage or high current, providing students with a safe cognitive and operational environment.

[0004] However, in actual circuit breaker teaching operations, the following problems exist:

[0005] In current circuit breaker teaching operations, circuit breakers and other components are often installed on a teaching platform for centralized operation. However, some components are similar in size and appearance, making them prone to misoperation. If students accidentally operate the circuit breaker switch (such as opening or closing a disconnecting switch under load, or accidentally closing a faulty line), it may cause serious accidents such as arcing short circuits, equipment damage, or even electric shock. The risk of operational errors is even higher in real high-voltage or high-current experimental environments.

[0006] Therefore, how to overcome the shortcomings of the existing technology mentioned above has become the subject of this utility model. Utility Model Content

[0007] The purpose of this invention is to provide a circuit breaker quick-locking device with a combination lock.

[0008] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0009] A circuit breaker quick-locking device with a combination lock is disclosed. The circuit breaker is positioned and connected to the teaching display surface of a teaching platform. The circuit breaker includes a circuit breaker body and a switch lever disposed on the circuit breaker body. The locking device is positioned and connected to the teaching display surface and is disposed corresponding to the circuit breaker body. The locking device includes a sliding member, a combination lock, and a fixing sleeve. The sliding member is disposed on the teaching display surface corresponding to the circuit breaker body. The sliding member is slidably disposed relative to the circuit breaker body, and the sliding direction of the sliding member is parallel to the actuation direction of the switch lever. The combination lock is disposed on the teaching display surface. The combination lock is located on one side of the sliding track of the sliding member. The sliding member has a latch that can be adapted to the combination lock. The combination lock is configured to engage or disengage with the latch of the sliding member. The fixing sleeve is detachably positioned on the switch lever. The fixing sleeve and the sliding member are connected by a linkage to make the sliding member and the switch lever mechanically linked. When the combination lock engages with the latch, the movement of the sliding member and the switch lever is restricted. When the combination lock disengages from the latch, the movement of the sliding member and the switch lever is released to make them move synchronously.

[0010] In the above solution, the switch lever on the circuit breaker body can be locked by the cooperation of a fixed sleeve, a sliding component, a switch lever, and a combination lock, thereby reducing the risk of operational errors.

[0011] Specifically, the switch lever is first moved to the upper end by the traction of the fixed sleeve, so that the combination lock engages with the latch on the sliding member. At this time, the movement of the sliding member and the switch lever is restricted, and the switch lever cannot be moved arbitrarily. Then, once the operator needs to move the switch lever 12, it directly drives the combination lock to unlock and disengage from the latch. At this time, the movement of the sliding member and the switch lever is released, and the two can move synchronously. After that, the switch lever can be moved to the lower end.

[0012] Unlike existing technologies, this solution achieves safety interlocking of circuit breaker operation through a combination of mechanical linkage and password control, effectively preventing teaching accidents caused by misoperation. This design not only enhances the safety of teaching demonstrations but also integrates the management of operating permissions into the practical training process, reflecting the dual constraints of technology and responsibility.

[0013] A further technical solution involves using the teaching display surface as a reference, which is perpendicular to the horizontal plane, and the switch lever moving in the up-down direction; the sliding member includes a fixed cover, which is positioned above the circuit breaker body, and the inner wall shape of the fixed cover is adapted to the upper outer contour of the circuit breaker body; when the switch lever is moved to the upper position, an anti-collision gap is formed between the inner side wall of the upper end of the fixed cover and the upper end face of the circuit breaker body.

[0014] With the above design, a stable covering structure is formed between the fixed cover and the circuit breaker body, which not only ensures the linkage accuracy between the sliding component and the switch lever, preventing the sliding component from sliding easily, but also avoids structural interference caused by external forces during operation, thus reducing the probability of the sliding component being scraped off by external forces. At the same time, it creates favorable conditions for the stable engagement of the combination lock and the latch.

[0015] In a further technical solution, the length of the anti-collision gap is greater than or equal to the toggle stroke length of the switch lever.

[0016] Generally, it is preferred to be equal to, so that the sliding member can fully fit with the circuit breaker body and avoid shaking.

[0017] With the above design, rigid contact between the fixed cover and the circuit breaker body can be effectively avoided during the movement of the switch lever, ensuring that the sliding part runs smoothly along the preset trajectory. At the same time, it provides sufficient space for reliable engagement and disengagement between the latch and the combination lock, preventing insufficient engagement of the latch due to insufficient travel.

[0018] In a further technical solution, the side of the slider has two guide strips, which are respectively set on both sides of the slider's sliding trajectory; the teaching display surface is provided with two guide grooves, which are respectively set one-to-one with the two guide strips, and the guide strips are configured to be embedded in the guide grooves so as to enable the slider to slide relative to the circuit breaker body.

[0019] The above design effectively constrains the motion freedom of the slider, ensuring it slides along a preset straight path (the straight path formed when the switch lever slides up and down), preventing deviation or jamming. The fit between the guide bar and the guide groove is similar to the fitting method of a track and slide rail, achieving precise guidance and stable support.

[0020] A further technical solution includes a fixed cylinder with an opening on the upper outer wall of the sliding member, with the latch disposed inside the fixed cylinder and corresponding to the opening. An elastic element is installed inside the fixed cylinder, acting on the latch to give it a tendency to always slide out of the opening. A guide hole is provided on the outer side of the fixed cylinder, and a slider is provided on the fixed cylinder. The slider is positioned and connected to the latch, and its movement is limited by the guide hole of the fixed cylinder. The slider is configured to drive the latch to move along the internal axis of the fixed cylinder. The combination lock has a lock hole configured to accommodate the latch.

[0021] With the above design, the latch and combination lock can be quickly engaged and disengaged. Specifically, the elastic element provides a continuous extension preload to the latch, ensuring that the latch is always in a lockable state when no external force is applied, thus enhancing security and reliability. The slider moves linearly through the constraint of the guide hole, causing the latch to retract into the fixed cylinder, thereby disengaging from the combination lock's keyhole. When the password is verified correctly, the slider is controlled to drive the latch to overcome the elastic force of the elastic element and retract, completing the unlocking action.

[0022] In a further technical solution, the fixing sleeve is fitted onto the switch lever and connected to the switch lever via a connector; the length of the fixing sleeve is equal to the length of the switch lever.

[0023] The inner wall shape of the retaining sleeve matches the outer wall contour of the switch lever, ensuring a tight fit between the retaining sleeve and the switch lever.

[0024] With the above design, the fixed sleeve can completely cover the switch lever, improving the overall structure's protection and aesthetics, while preventing foreign objects from entering and obstructing movement; the connector (preferably a screw) ensures a secure connection between the fixed sleeve and the switch lever, preventing loosening due to vibration or external force; the fixed sleeve and the sliding component are linked together through a connecting structure, allowing the sliding component to move synchronously with the switch lever.

[0025] In a further technical solution, two connecting rods are provided, which are respectively located on both sides of the sliding track of the sliding member; one end of the connecting rod is hinged to the fixed sleeve, and the other end is hinged to the outer wall of the sliding member.

[0026] With the above design, a double-link linkage structure can be formed, which effectively enhances transmission stability and avoids the phenomenon of uneven load or jamming caused by single-point force. The two links work together during the movement to ensure that the sliding part moves up and down along the length of the guide groove.

[0027] The terms "first," "second," etc., used in this article do not specifically refer to order or sequence, nor are they intended to limit this case; they are merely used to distinguish components or operations described using the same technical terms.

[0028] The terms "connection" or "positioning" as used in this article can refer to two or more components or devices making direct physical contact with each other, or making indirect physical contact with each other, or to two or more components or devices operating or moving with each other.

[0029] The terms “include,” “including,” and “have” used in this article are all open-ended, meaning they include but are not limited to.

[0030] Unless otherwise specified, the terms used herein generally have their ordinary meaning in the context of the art, the subject matter, and the specific context. Certain terms used to describe this case will be discussed below or elsewhere in this specification to provide additional guidance to those skilled in the art in describing this case.

[0031] The terms “front,” “back,” “up,” “down,” “left,” and “right” used in this article are directional terms. In this case, they are only used to describe the positional relationship between the structures and are not intended to limit the specific direction of the protection scheme or its actual implementation.

[0032] The working principle and advantages of this utility model are as follows:

[0033] In this invention, the switch lever on the circuit breaker body can be locked by the cooperation of a fixed sleeve, a sliding part, a switch lever, and a combination lock, thereby reducing the risk of operational errors.

[0034] Specifically, the switch lever is first moved to the upper end by the traction of the fixed sleeve, so that the combination lock engages with the latch on the sliding part. At this time, the movement of the sliding part and the switch lever is restricted, and the switch lever cannot be moved at will. Then, once the operator needs to move the switch lever, it directly drives the combination lock to unlock and disengage from the latch. At this time, the movement of the sliding part and the switch lever is released, and the two can move synchronously. After that, the switch lever can be moved to the lower end.

[0035] Unlike existing technologies, this solution combines mechanical linkage with password lock control to achieve a safe interlock for circuit breaker operation, effectively preventing teaching accidents caused by misoperation. This design not only enhances the safety of teaching demonstrations but also integrates the management of operating permissions into the practical training process, reflecting the dual constraints of technology and responsibility. Attached Figure Description

[0036] Appendix Figure 1 This is a schematic diagram of the overall structure in an embodiment of the present utility model;

[0037] Appendix Figure 2 This is a schematic diagram of the sliding component structure in an embodiment of the present utility model;

[0038] Appendix Figure 3 This is a cross-sectional view of the fixing cover in an embodiment of the present utility model;

[0039] Appendix Figure 4 This is a schematic diagram of the longitudinal section structure of the switch lever in the embodiment of the present utility model when it is at the upper end;

[0040] Appendix Figure 5 This is a schematic diagram of the guide sliding hole structure in an embodiment of this utility model.

[0041] In the attached diagrams above: 1. Circuit breaker; 11. Circuit breaker body; 12. Switch lever;

[0042] 2. Sliding component; 21. Lock; 22. Fixing cover; 23. Anti-collision gap; 24. Guide strip; 25. Fixing cylinder; 26. Elastic component; 27. Guide slide hole; 28. Sliding block;

[0043] 3. Combination lock; 31. Keyhole;

[0044] 4. Fixing sleeve;

[0045] 5. Connecting rod;

[0046] 6. Teaching display surface; 61. Guide slot. Detailed Implementation

[0047] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0048] Example: The present invention will be clearly described below with illustrations and detailed description. Any person skilled in the art who understands the examples of the present invention can make changes and modifications based on the technology taught in the present invention without departing from the spirit and scope of the present invention.

[0049] The terminology used herein is for the purpose of describing specific embodiments only and is not intended to limit the scope of this work. Singular forms such as “a,” “this,” “this,” “the,” and “the” as used herein also include plural forms.

[0050] See appendix Figure 1 - Figure 5As shown, a circuit breaker quick-locking device with a combination lock 3 is disclosed. The circuit breaker 1 is positioned and connected to the teaching display surface 6 of a teaching platform. The circuit breaker 1 includes a circuit breaker body 11 and a switch lever 12 disposed on the circuit breaker body 11. The locking device is positioned and connected to the teaching display surface 6 and is disposed corresponding to the circuit breaker body 11. The locking device includes a sliding member 2, a combination lock 3, and a fixing sleeve 4. The sliding member 2, corresponding to the circuit breaker body 11, is provided on the teaching display surface 6. The sliding member 2 is slidably disposed relative to the circuit breaker body 11, and the sliding direction of the sliding member 2 is parallel to the toggle direction of the switch lever 12. The combination lock 3 is provided on the teaching display surface 6. The combination lock 3 is located on one side of the sliding track of the sliding member 2. The sliding member 2 has a latch 21 that can be adapted to the combination lock 3. The combination lock 3 is configured to engage or disengage with the latch 21 of the sliding member 2. The fixing sleeve 4 is detachably connected to the switch lever 12. The fixing sleeve 4 is connected to the sliding member 2 through a connecting rod 5 so that the sliding member 2 and the switch lever 12 form a mechanical linkage. When the combination lock 3 engages with the latch 21, the movement of the sliding member 2 and the switch lever 12 is restricted. When the combination lock 3 disengages from the latch 21, the movement of the sliding member 2 and the switch lever 12 is released so that the two can move synchronously.

[0051] In this utility model, the combination lock 3 can be selected from the combination lock 3 on the combination box, the combination lock 3 on the pencil case, or the electronic combination lock 3, etc. Since the combination lock 3 is existing technology, it will not be described in detail here. When the combination lock 3 is working, it can lock the latch 21. Only when the corresponding password is entered will the lock 21 be unlocked.

[0052] In this invention, the switch lever 12 on the circuit breaker body 11 can be locked by the cooperation of the fixed sleeve 4, the sliding member 2, the switch lever 12 and the combination lock 3, so as to reduce the risk of operation error.

[0053] Specifically, the switch lever 12 is first moved to the upper end by the traction of the fixed sleeve 4, so that the combination lock 3 engages with the latch 21 on the sliding member 2. At this time, the movement of the sliding member 2 and the switch lever 12 is restricted, and the switch lever 12 cannot be moved at will. Then, once the operator needs to move the switch lever 12, the combination lock 3 is directly driven to unlock and disengage from the latch 21. At this time, the movement of the sliding member 2 and the switch lever 12 is released, and the two can move synchronously. Then, the switch lever 12 can be moved to the lower end.

[0054] It is important to note that when the switch lever 12 is moved to the upper or lower position, it means that the circuit breaker 1 is in the open and closed state, respectively. Under normal circumstances, the circuit breaker is in the open (or closed) state to ensure that the circuit is conducting and that power can be transmitted normally. The circuit breaker will only close (or disconnect) when a circuit fault occurs (such as a short circuit or overload) or when manual disconnection of the circuit is required.

[0055] Unlike existing technologies, this solution combines mechanical linkage with password lock control to achieve a safe interlock for circuit breaker operation, effectively preventing teaching accidents caused by misoperation. This design not only enhances the safety of teaching demonstrations but also integrates the management of operating permissions into the practical training process, reflecting the dual constraints of technology and responsibility.

[0056] A further technical solution involves using the teaching display surface 6 as a reference, which is perpendicular to the horizontal plane, and the switch lever 12 moving in the up-down direction; the sliding member 2 includes a fixed cover 22, which covers the circuit breaker body 11, and the inner wall shape of the fixed cover 22 is adapted to the upper outer contour of the circuit breaker body 11; when the switch lever 12 is moved to the upper position, an anti-collision gap 23 is formed between the inner side wall of the upper end of the fixed cover 22 and the upper end face of the circuit breaker body 11.

[0057] With the above design, a stable covering structure is formed between the fixed cover 22 and the circuit breaker body 11, which not only ensures the linkage accuracy between the sliding member 2 and the switch lever 12, so that the sliding member 2 will not slide easily, but also avoids structural interference caused by external forces during operation, thereby reducing the probability of external forces scraping the sliding member 2 off. At the same time, it creates favorable conditions for the stable engagement of the combination lock 3 and the latch 21.

[0058] In a further technical solution, the length of the anti-collision gap 23 is greater than or equal to the toggle stroke length of the switch lever 12.

[0059] Generally, it is preferred to be equal to, so that the sliding member 2 can fully fit with the circuit breaker body 11, avoiding the occurrence of shaking.

[0060] With the above design, rigid contact between the fixed cover 22 and the circuit breaker body 11 can be effectively avoided during the movement of the switch lever 12, ensuring that the sliding member 2 runs smoothly along the preset trajectory. At the same time, it provides sufficient space for reliable engagement and disengagement between the latch 21 and the combination lock 3, preventing insufficient engagement of the latch 21 due to insufficient travel.

[0061] In a further technical solution, the side of the slider 2 has two guide bars 24, which are respectively arranged on both sides of the sliding trajectory of the slider 2; the teaching display surface 6 is provided with two guide grooves 61, which are respectively arranged in a one-to-one correspondence with the two guide bars 24, and the guide bars 24 are configured to be embedded in the guide grooves 61 so as to enable the slider 2 to slide relative to the circuit breaker body 11.

[0062] The above design effectively constrains the motion freedom of the slider 2, ensuring that it slides along a preset straight path (the preset path is the straight path formed by the switch lever 12 when it slides up and down), avoiding deviation or jamming. The fit between the guide bar 24 and the guide groove 61 can be compared with the fitting method of the track and slide rail, achieving precise guidance and stable support.

[0063] A further technical solution is provided in which a fixed cylinder 25 with an opening is provided on the upper outer side wall of the sliding member 2, the latch 21 is disposed inside the fixed cylinder 25 and corresponding to the opening, an elastic member 26 is installed inside the fixed cylinder 25, the elastic member 26 acts on the latch 21 so that the latch 21 has a tendency to always slide out of the opening; a guide sliding hole 27 is provided on the outer side of the fixed cylinder 25, and a slider 28 is provided on the fixed cylinder 25. The slider 28 is positioned and connected to the latch 21, and its movement is limited by the guide sliding hole 27 on the fixed cylinder 25. The slider 28 is configured to drive the latch 21 to move along the internal axis of the fixed cylinder 25; the combination lock 3 has a lock hole 31, which is configured to accommodate the latch 21.

[0064] With the above design, the latch 21 can be quickly engaged and disengaged from the combination lock 3. Specifically, the elastic element 26 provides a continuous extension preload to the latch 21, ensuring that the latch 21 is always in a lockable state when no external force is applied, thus enhancing safety and reliability. The slider 28 moves linearly under the constraint of the guide hole 27, causing the latch 21 to retract into the fixed cylinder 25, thereby disengaging from the lock hole 31 of the combination lock 3. When the password verification is correct, the slider 28 controls the latch 21 to overcome the elastic force of the elastic element 26 and retract, completing the unlocking action.

[0065] In a further technical solution, the fixing sleeve 4 is fitted over the switch toggle lever 12 and connected to the switch toggle lever 12 via a connector; the length of the fixing sleeve 4 is equal to the length of the switch toggle lever 12.

[0066] The inner wall shape of the fixed sleeve 4 matches the outer wall contour of the switch lever 12, ensuring a tight fit between the fixed sleeve 4 and the switch lever 12.

[0067] With the above design, the fixed sleeve 4 can completely cover the switch lever 12, improving the overall structure's protection and aesthetics, while preventing foreign objects from entering and obstructing movement; the connector (preferably a screw) ensures a secure connection between the fixed sleeve 4 and the switch lever 12, preventing loosening due to vibration or external force; the fixed sleeve 4 and the sliding member 2 are linked together through the connection structure, so that the sliding member 2 moves synchronously with the switch lever 12.

[0068] In a further technical solution, two connecting rods 5 are provided, which are respectively arranged on both sides of the sliding track of the sliding member 2; one end of the connecting rod 5 is hinged to the fixed sleeve 4, and the other end is hinged to the outer wall of the sliding member 2.

[0069] With the above design, a double linkage structure of 5 can be formed, which effectively enhances the transmission stability and avoids the phenomenon of uneven load or jamming caused by single-point force. The two linkages 5 cooperate with each other during the movement to ensure that the sliding part 2 moves up and down along the length direction of the guide groove 61.

[0070] It should be noted that, in order to further reduce the risk of operational errors, the latch 21 can be locked again by the combination lock 3 after the switch lever 12 slides from the top to the bottom. To achieve this, a second fixed cover 22 and a second combination lock 3 can be set below the circuit breaker body 11, and a second latch 21 can be set on the second fixed cover 22. That is, after the switch lever 12 slides from the top to the bottom, the second latch 21 and the second combination lock 3 are matched and locked.

[0071] Alternatively, a second keyhole 31 may be provided on the only combination lock 3 described in this application. After the switch lever 12 slides from top to bottom, the second keyhole 31 is aligned with the latch 21 to complete the matching and locking.

[0072] Working principle:

[0073] For example, when the switch lever 12 is moved to the upper end, the circuit breaker 1 is in the open state; when it is moved to the lower end, the circuit breaker 1 is in the closed state.

[0074] Therefore, as Figure 2 As shown, when the switch lever 12 is at the upper end, the latch 21 is inserted into the lock hole 31 under the action of the elastic element 26 (spring) to achieve locking. At this time, the combination lock 3 latches the latch 21, so that the fixed cover 22, the fixed sleeve 4 and the switch lever 12 can no longer move up and down.

[0075] The operator then enters the password. When the password is verified correctly, the lock 21 is released, and the slider 28 can be slid directly. The slider 28 then moves in a straight line under the constraint of the guide hole 27, causing the lock 21 to retract into the fixed cylinder 25, thus disengaging from the lock hole 31 of the combination lock 3.

[0076] Then, the operator can pull the switch lever 12 to the lower end by moving the sliding sleeve. When the sliding sleeve moves, it will bring the fixed cover 22 down through the connecting rod 5. At this time, due to the cooperation between the guide bar 24 and the guide groove 61, the degree of freedom of movement of the fixed cover 22 is restricted, so that the fixed cover 22 can only slide along the preset straight path, that is, the straight path formed by the switch lever 12 when it slides up and down.

[0077] The above embodiments are only for illustrating the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be construed as limiting the scope of protection of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be included within the scope of protection of this utility model.

Claims

1. A circuit breaker quick-locking device with a combination lock, wherein the circuit breaker (1) is positioned and connected to the teaching display surface (6) of a teaching platform, the circuit breaker (1) includes a circuit breaker body (11) and a switch lever (12) disposed on the circuit breaker body (11), and the locking device is positioned and connected to the teaching display surface (6) and is disposed corresponding to the circuit breaker body (11), characterized in that: The locking device includes a sliding member (2), a combination lock (3), and a fixing sleeve (4); A sliding member (2) corresponding to the circuit breaker body (11) is provided on the teaching display surface (6). The sliding member (2) is slidably disposed relative to the circuit breaker body (11), and the sliding direction of the sliding member (2) is parallel to the toggle direction of the switch lever (12). The combination lock (3) is provided on the teaching display surface (6). The combination lock (3) is located on one side of the sliding track of the slider (2). The slider (2) has a latch (21) that can be adapted to the combination lock (3). The combination lock (3) is configured to selectively engage or disengage with the latch (21) of the slider (2). The fixed sleeve (4) is detachably connected to the switch lever (12). The fixed sleeve (4) is connected to the sliding member (2) through the connecting rod (5) so that the sliding member (2) and the switch lever (12) form a mechanical linkage. When the combination lock (3) is engaged with the latch (21), the movement of the sliding member (2) and the switch lever (12) is restricted; When the combination lock (3) is disengaged from the latch (21), the movement of the sliding member (2) and the switch lever (12) is released so that the two can move synchronously.

2. The circuit breaker quick-locking device with combination lock according to claim 1, characterized in that: With the teaching display surface (6) as the reference, the teaching display surface (6) is perpendicular to the horizontal plane, and the switch lever (12) is moved in the up and down direction; The sliding member (2) includes a fixing cover (22), which covers the circuit breaker body (11) above it, and the inner wall shape of the fixing cover (22) is adapted to the upper outer contour of the circuit breaker body (11). When the switch lever (12) is moved to the top, an anti-collision gap (23) is formed between the inner side wall of the upper end of the fixed cover (22) and the upper end face of the circuit breaker body (11).

3. The circuit breaker quick-locking device with a combination lock according to claim 2, characterized in that: The length of the anti-collision gap (23) is greater than or equal to the toggle stroke length of the switch lever (12).

4. The circuit breaker quick-locking device with combination lock according to claim 1, characterized in that: The slider (2) has two guide bars (24) on its side, and these two guide bars (24) are respectively arranged on both sides of the sliding track of the slider (2); The teaching display surface (6) is provided with two guide grooves (61), and the two guide grooves (61) are respectively configured to correspond one-to-one with the two guide bars (24). The guide bars (24) are configured to be embedded in the guide grooves (61) so as to enable the sliding member (2) to slide relative to the circuit breaker body (11).

5. The circuit breaker quick-locking device with combination lock according to claim 1, characterized in that: The upper outer wall of the sliding member (2) is provided with a fixed cylinder (25) with an opening. The latch (21) is provided inside the fixed cylinder (25) and is provided with a corresponding opening. An elastic member (26) is installed inside the fixed cylinder (25). The elastic member (26) acts on the latch (21) so that the latch (21) has a tendency to always slide out of the opening. The fixed cylinder (25) has a guide slide hole (27) on its outer side and a slider (28) on its fixed cylinder (25). The slider (28) is positioned and connected to the latch (21). Its movement is limited by the guide slide hole (27) on the fixed cylinder (25). The slider (28) is configured to drive the latch (21) to move along the internal axis of the fixed cylinder (25). The combination lock (3) has a keyhole (31) configured to receive the latch (21).

6. The circuit breaker quick-locking device with combination lock according to claim 1, characterized in that: The fixing sleeve (4) is covered on the switch lever (12) and connected to the switch lever (12) through a connector; The length of the fixed sleeve (4) is equal to the length of the switch lever (12).

7. The circuit breaker quick-locking device with combination lock according to claim 1, characterized in that: There are two connecting rods (5), which are respectively located on both sides of the sliding trajectory of the slider (2); One end of the connecting rod (5) is hinged to the fixed sleeve (4), and the other end is hinged to the outer wall of the sliding member (2).

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