A modular circuit breaker with quickly replaceable contact modules

Abstract

The utility model relates to circuit breaker technical field discloses a modularization circuit breaker of quick replacement contact module, including the circuit breaker body for controlling and protecting circuit, the both sides fixed setting of circuit breaker body upper end are used for the clamping structure of quick replacement contact module, the inner chamber fixed connection of circuit breaker body top end has the display screen for showing circuit information, the inner chamber fixed connection of circuit breaker body top end has the control switch for adjusting circuit breaker opening and closing, the inner chamber fixed connection of circuit breaker body top end has the warning light for prompting staff circuit breaker body working condition, through fixed column will contact module component stable installation on circuit breaker body, guarantee the connection firmness and provide the basis for quick replacement, the limit slot cooperation with the limit ball realizes accurate positioning, strengthens the connection reliability, the inner contact head guarantees circuit conduction, and the sliding cooperation of its with the clamping inner column, connection main column is convenient for contact module dismounting.

Description

Technical Field

[0001] This utility model relates to the field of circuit breaker technology, specifically to a modular circuit breaker with a quick-change contact module. Background Technology

[0002] A circuit breaker is a switching device that can close, carry, and interrupt current under normal circuit conditions and close, carry, and interrupt current under abnormal circuit conditions within a specified time. However, when a circuit breaker is used for a long time, the contact module needs to be replaced. The replacement of contacts for existing circuit breakers is cumbersome and time-consuming.

[0003] For example, CN221727036U discloses a modular circuit breaker, including a circuit breaker body. A current transformer is embedded in the front side of the circuit breaker body near the bottom. Two mounting slots are opened on the front side of the circuit breaker body. Mounting brackets are movably inserted into the inner cavity of each of the two mounting slots. A positioning mechanism is provided between each mounting bracket and the inner wall of the mounting slot. A control module and a communication module are fixedly installed inside the two mounting brackets, respectively. By setting rectangular blocks, rectangular holes, and springs, when disassembling and maintaining the control module and communication module, the corresponding two rectangular blocks can be pressed to pull the rectangular blocks out of the rectangular holes. At the same time, the rectangular blocks compress the springs inside the rectangular slots, and then the control module or communication module, along with the mounting brackets, can be pulled out from the mounting slots. Disassembly is convenient, and there is no need to worry about the loss of mounting parts, resulting in better performance.

[0004] However, circuit breakers require contact module replacement after prolonged use, and existing circuit breaker contact replacement procedures are cumbersome and time-consuming. Workers often need to disassemble multiple components such as the external protective casing and connecting wires, and precisely align the internal mechanical structure during this process. Even slight deviations can affect the subsequent operation of the circuit breaker. In industrial settings requiring continuous power supply, this inevitably leads to production interruptions, increasing labor costs and potentially causing a chain reaction of problems such as equipment downtime and production delays. Therefore, those skilled in the art provide a modular circuit breaker with quickly replaceable contact modules to solve the problems mentioned in the background section. Utility Model Content

[0005] The purpose of this invention is to provide a modular circuit breaker with quick contact module replacement, which solves the problem that existing circuit breakers require contact module replacement after long-term use, and that the replacement of contacts is cumbersome and time-consuming.

[0006] This utility model provides the following technical solution: a modular circuit breaker with quick-change contact modules, including a circuit breaker body for controlling and protecting the circuit, with snap-fit ​​structures for quick-change of contact modules fixedly provided on both sides of the upper end of the circuit breaker body, a display screen for displaying circuit information fixedly connected to the inner cavity of the top of the circuit breaker body, a control switch for adjusting the opening and closing of the circuit breaker fixedly connected to the inner cavity of the top of the circuit breaker body, and a warning light for indicating the working status of the circuit breaker body to the operator.

[0007] As a preferred embodiment of the above technical solution, the snap-fit ​​structure includes a fixing post, which is fixedly connected to both sides of the top of the circuit breaker body. A contact module assembly is fixedly connected to the bottom of the fixing post, and the bottom of the contact module assembly is fixedly connected to the circuit breaker body.

[0008] As a preferred embodiment of the above technical solution, a connecting column is fixedly connected to the inner cavity of the fixed column, a snap-fit ​​outer column is fixedly connected to the inner surface of the connecting column, and a connecting main column is slidably connected to the center of the inner surface of the snap-fit ​​outer column.

[0009] As a preferred embodiment of the above technical solution, a first spring for resetting the snap-fit ​​outer column is fixedly connected to one side of the center of the outer surface of the connecting main column, and the first spring is slidably connected between the snap-fit ​​outer column and the connecting main column.

[0010] As a preferred embodiment of the above technical solution, the inner cavity at the upper end of the connecting main column is provided with a limiting groove symmetrically arranged along the circumference, and the inner cavity of the limiting groove is slidably connected to a limiting ball.

[0011] As a preferred embodiment of the above technical solution, two sets of symmetrically arranged and relatively connected inner contact heads are slidably connected at the center of the inner cavity of the connecting main column. The bottom end of the inner contact head is fixedly connected to the contact module assembly. A snap-fit ​​inner column is slidably connected to the outer surface of the upper end of the inner contact head. The bottom end of the snap-fit ​​inner column is slidably connected to the inner cavity at the upper end of the connecting main column.

[0012] As a preferred embodiment of the above technical solution, a second spring is fixedly connected to the center of the inner cavity at the top of the snap-fit ​​inner post, and the snap-fit ​​inner post is fixedly connected to the top of the snap-fit ​​inner post through the second spring. A snap-fit ​​groove for tightly engaging with the limiting ball is provided at the center of the outer surface of the snap-fit ​​inner post.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] This invention features a snap-fit ​​structure. When the contact module needs to be replaced, an external force is applied to the snap-fit ​​inner post to overcome the elastic force of the second spring, causing the snap-fit ​​inner post to slide upward. At this time, the snap-fit ​​groove separates from the limiting ball, and the limiting ball slides inward into the limiting groove. Under the external force, the connecting main post slides relative to the snap-fit ​​outer post, compressing the first spring and thus driving the contact module assembly to move outward, separating the inner contact head from the snap-fit ​​inner post, thereby disassembling the old contact module assembly. When installing the new contact module assembly, the connecting main post is aligned with the snap-fit ​​outer post and pushed, causing the connecting main post to slide inward relative to the snap-fit ​​outer post and compress the first spring. Simultaneously, the snap-fit ​​inner post is pressed down to slide downward, pushing the limiting ball to move outward into the limiting groove. When the snap-fit ​​groove aligns with the limiting ball, the limiting ball enters the snap-fit ​​groove and is fixed. After releasing the external force, the first spring returns to its original position, and the inner contact head makes tight contact with the snap-fit ​​inner post, completing the replacement process.

[0015] Based on the aforementioned beneficial effects, when the circuit breaker is operating normally, the circuit breaker body undertakes the core functions of controlling and protecting the circuit. Through its internal structure, it achieves circuit on / off control and provides protection against overload, short circuit, and other faults. The snap-fit ​​structure achieves a stable connection through the cooperation of components such as the fixing post, connecting post, snap-fit ​​outer post, and connecting main post: the fixing post fixes the contact module assembly to the circuit breaker body; the connecting main post slides with the snap-fit ​​outer post; a first spring ensures the reset after relative movement; a limit ball slides within a limit groove and tightly engages with the snap-fit ​​groove of the snap-fit ​​inner post; a second spring provides continuous elasticity to the snap-fit ​​inner post, ensuring the stable fixing of the contact module assembly; and the inner contact ensures normal circuit conduction. Simultaneously, the display screen shows circuit information in real time, the control switch is used for manual adjustment of the circuit breaker's opening and closing, and the warning light indicates the circuit breaker's operating status, all working together to ensure the stable operation of the circuit breaker. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of a modular circuit breaker with quick-change contact modules.

[0017] Figure 2 This is a schematic diagram of the display screen connection for a modular circuit breaker with quick-change contact modules;

[0018] Figure 3 This is a schematic diagram of the snap-fit ​​connection column of a modular circuit breaker with quick-change contact modules;

[0019] Figure 4 This is a schematic diagram of the snap-fit ​​structure and snap-fit ​​inner column connection of a modular circuit breaker with quick-change contact modules.

[0020] In the diagram: 1. Circuit breaker body; 2. Snap-fit ​​structure; 21. Fixing post; 22. Contact module assembly; 23. Connecting post; 24. Snap-fit ​​outer post; 25. Connecting main post; 26. First spring; 27. Limiting groove; 28. Limiting ball; 29. ​​Inner contact head; 210. Snap-fit ​​inner post; 211. Second spring; 212. Snap-fit ​​groove; 3. Display screen; 4. Control switch; 5. Warning light. Detailed Implementation

[0021] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0022] Please see Figure 1 - Figure 4 As shown, this utility model provides a technical solution: a modular circuit breaker with quick-change contact modules, including a circuit breaker body 1 for controlling and protecting the circuit, with snap-fit ​​structures 2 for quick-change of contact modules fixedly installed on both sides of the upper end of the circuit breaker body 1, a display screen 3 for displaying circuit information fixedly connected to the inner cavity at the top of the circuit breaker body 1, a control switch 4 for adjusting the opening and closing of the circuit breaker fixedly connected to the inner cavity at the top of the circuit breaker body 1, and a warning light 5 for informing the operator of the working status of the circuit breaker body 1.

[0023] The circuit breaker body 1 serves as the core foundation for controlling and protecting the circuit. The snap-fit ​​structures 2 on both sides enable quick replacement of the contact modules, significantly improving maintenance efficiency and reducing downtime. The display screen 3 can show circuit information in real time, allowing staff to monitor the circuit's operating status. The control switch 4 facilitates manual adjustment of the circuit breaker's opening and closing, enhancing operational flexibility. The warning light 5 provides a clear indication of the circuit breaker's operating status, facilitating timely fault detection and handling. During normal operation, the circuit breaker body 1 uses its internal structure to control the circuit's on / off state and provide overload and short-circuit protection. The snap-fit ​​structure 2, through the cooperation of components such as the fixing post 21, connecting post 23, snap-fit ​​outer post 24, connecting main post 25, limit ball 28, and springs, stably fixes the contact module assembly 22, ensuring normal circuit conduction. When it is necessary to replace the contact module, external force is applied to the snap-fit ​​inner post 210 to overcome the elasticity of the second spring 211, causing the limit ball 28 to separate from the snap-fit ​​groove 212. Then, with the reset action of the first spring 26 and the relative sliding of the components, the contact module can be quickly disassembled and installed.

[0024] As one implementation method in this embodiment, please refer to Figure 1 - Figure 3 As shown, the snap-fit ​​structure 2 includes a fixing post 21, which is fixedly connected to both sides of the top of the circuit breaker body 1. The bottom end of the fixing post 21 is fixedly connected to a contact module assembly 22, and the bottom end of the contact module assembly 22 is fixedly connected to the circuit breaker body 1.

[0025] The contact module assembly 22 is stably installed on the circuit breaker body 1 by fixing column 21, which not only ensures the stability of the connection between the contact module assembly 22 and the circuit breaker body 1, but also provides basic structural support for the rapid replacement of the contact module in the future, making the installation position of the contact module assembly 22 clear and reliable.

[0026] As one implementation method in this embodiment, please refer to Figure 1 - Figure 3 As shown, a connecting column 23 is fixedly connected to the inner cavity of the fixed column 21, and a snap-fit ​​outer column 24 is fixedly connected to the inner surface of the connecting column 23. A connecting main column 25 is slidably connected at the center of the inner surface of the snap-fit ​​outer column 24.

[0027] The connection structure formed by the cooperation of the connecting post 23, the snap-fit ​​outer post 24 and the connecting main post 25 provides a relatively sliding connection structure, which provides room for the disassembly and installation of the contact module, making the replacement process smooth and avoiding the disassembly difficulties caused by the fixed connection.

[0028] As one implementation method in this embodiment, please refer to Figure 1 - Figure 4 As shown, a first spring 26 for resetting the snap-fit ​​outer column 24 is fixedly connected to one side of the center of the outer surface of the connecting main column 25. The first spring 26 is slidably connected between the snap-fit ​​outer column 24 and the connecting main column 25.

[0029] The first spring 26 can automatically reset the outer post 24 and the connecting main post 25 to their initial positions after relative movement, ensuring the stability and consistency of the snap-fit ​​structure 2 after each operation, reducing connection failures caused by structural position offset, and simplifying the operation steps when replacing the contact module.

[0030] As one implementation method in this embodiment, please refer to Figure 3 - Figure 4 As shown, the inner cavity of the main column 25 is provided with a limiting groove 27 symmetrically arranged along the circumference, and the inner cavity of the limiting groove 27 is slidably connected to a limiting ball 28.

[0031] The limiting groove 27 provides a stable sliding track for the limiting ball 28, which can play a positioning and limiting role during the snap-fit ​​process, ensuring that the connection position between the snap-fit ​​inner post 210 and the connecting main post 25 is accurate, enhancing the reliability of the snap-fit ​​structure 2, and preventing the contact module from becoming loose during the operation of the circuit breaker.

[0032] As one implementation method in this embodiment, please refer to Figure 3 - Figure 4As shown, two sets of symmetrically arranged and relatively connected inner contact heads 29 are slidably connected at the center of the inner cavity of the connecting main column 25. The bottom end of the inner contact head 29 is fixedly connected to the contact module assembly 22. The outer surface of the upper end of the inner contact head 29 is slidably connected to the snap-fit ​​inner column 210. The bottom end of the snap-fit ​​inner column 210 is slidably connected to the inner cavity of the upper end of the connecting main column 25.

[0033] The inner contact 29 is fixedly connected to the contact module assembly 22, ensuring the continuity of the circuit connection. The sliding connection between the snap-fit ​​inner post 210 and the inner contact 29 and the connecting main post 25 allows the inner contact 29 to be separated and combined with other components by sliding the snap-fit ​​inner post 210 when replacing the contact module. This facilitates the quick disassembly and installation of the contact module. At the same time, the two sets of symmetrical inner contacts 29 also improve the stability of the circuit connection.

[0034] As one implementation method in this embodiment, please refer to Figure 3 - Figure 4 As shown, a second spring 211 is fixedly connected to the center of the inner cavity at the top of the snap-fit ​​inner post 210. The snap-fit ​​inner post 210 is fixedly connected to the top of the snap-fit ​​inner post 210 through the second spring 211. A snap-fit ​​groove 212 for tightly engaging with the limiting ball 28 is provided at the center of the outer surface of the snap-fit ​​inner post 210.

[0035] The second spring 211 provides continuous elastic force to the inner locking post 210, allowing the locking groove 212 on the inner locking post 210 to make close contact with the limiting ball 28, thereby firmly fixing the inner locking post 210 inside the connecting main post 25 and ensuring stable connection of the contact module in the working state. When the contact module needs to be replaced, applying external force to overcome the elastic force of the second spring 211 can separate the locking groove 212 from the limiting ball 28, facilitating disassembly and realizing the function of quick replacement.

[0036] Working Principle: During normal operation, the circuit breaker body 1 performs the core functions of controlling and protecting the circuit. Its internal structure controls the circuit's on / off state and provides protection against overload, short circuit, and other faults. The snap-fit ​​structure 2 achieves a stable connection through the cooperation of components such as the fixing post 21, connecting post 23, snap-fit ​​outer post 24, and connecting main post 25. The fixing post 21 secures the contact module assembly 22 to the circuit breaker body 1. The connecting main post 25 slides against the snap-fit ​​outer post 24. The first spring 26 ensures the reset after relative movement. The limiting ball 28 slides within the limiting groove 27 and tightly engages with the snap-fit ​​groove 212 of the snap-fit ​​inner post 210. The second spring 211 provides continuous elasticity to the snap-fit ​​inner post 210, ensuring the stable fixation of the contact module assembly 22. The inner contact 29 ensures normal circuit continuity. Simultaneously, the display screen 3 shows real-time circuit information, the control switch 4 is used for manual adjustment of the circuit breaker's opening and closing, and the warning light 5 indicates the circuit breaker's operating status, all working together to ensure the stable operation of the circuit breaker.

[0037] When the contact module needs to be replaced, an external force is applied to the inner locking post 210 to overcome the elastic force of the second spring 211, causing the inner locking post 210 to slide upward. At this time, the locking groove 212 separates from the limiting ball 28, and the limiting ball 28 slides inward toward the limiting groove 27. Under the external force, the connecting main post 25 slides relative to the outer locking post 24, the first spring 26 is compressed, and thus the contact module assembly 22 moves outward, causing the inner contact head 29 to separate from the inner locking post 210, thereby realizing the disassembly of the old contact module assembly 22. When installing the new contact module assembly 22, align the connecting main post 25 with the snap-fit ​​outer post 24 and push it to make the connecting main post 25 slide inward relative to the snap-fit ​​outer post 24 and compress the first spring 26. At the same time, press the snap-fit ​​inner post 210 to make it slide downward and push the limiting ball 28 to move outward of the limiting groove 27. When the snap-fit ​​groove 212 corresponds to the limiting ball 28, the limiting ball 28 enters the snap-fit ​​groove 212 to complete the fixation. After releasing the external force, the first spring 26 returns to its original position, and the inner contact head 29 makes tight contact with the snap-fit ​​inner post 210, completing the replacement process.

[0038] The above embodiments are only used to illustrate the technical solution of this utility model, and are not intended to limit it.

Claims

1. A modular circuit breaker with quickly replaceable contact modules, characterized in that: The circuit breaker body (1) is used for controlling and protecting the circuit. The upper sides of the circuit breaker body (1) are fixedly provided with snap-fit ​​structures (2) for quick replacement of contact modules. The inner cavity at the top of the circuit breaker body (1) is fixedly connected with a display screen (3) for displaying circuit information. The inner cavity at the top of the circuit breaker body (1) is fixedly connected with a control switch (4) for adjusting the opening and closing of the circuit breaker. The inner cavity at the top of the circuit breaker body (1) is fixedly connected with a warning light (5) for indicating the working status of the circuit breaker body (1) to the operator.

2. A modular circuit breaker with quickly replaceable contact modules according to claim 1, characterized in that: The snap-fit ​​structure (2) includes a fixing post (21), which is fixedly connected to both sides of the top of the circuit breaker body (1). The bottom end of the fixing post (21) is fixedly connected to a contact module assembly (22), and the bottom end of the contact module assembly (22) is fixedly connected to the circuit breaker body (1).

3. A modular circuit breaker with quickly replaceable contact modules according to claim 2, characterized in that: The inner cavity of the fixed column (21) is fixedly connected to the connecting column (23), the inner surface of the connecting column (23) is fixedly connected to the snap-fit ​​outer column (24), and the center of the inner surface of the snap-fit ​​outer column (24) is slidably connected to the connecting main column (25).

4. A modular circuit breaker with quickly replaceable contact modules according to claim 3, characterized in that: A first spring (26) for resetting the snap-fit ​​outer column (24) is fixedly connected to one side of the center of the outer surface of the connecting main column (25). The first spring (26) is slidably connected between the snap-fit ​​outer column (24) and the connecting main column (25).

5. A modular circuit breaker with quickly replaceable contact modules according to claim 4, characterized in that: The inner cavity at the upper end of the connecting main column (25) is provided with a limiting groove (27) symmetrically arranged along the circumference, and the inner cavity of the limiting groove (27) is slidably connected to a limiting ball (28).

6. A modular circuit breaker with quickly replaceable contact modules according to claim 5, characterized in that: Two sets of symmetrically arranged, oppositely connected inner contact heads (29) are slidably connected at the center of the inner cavity of the connecting main column (25). The bottom end of the inner contact head (29) is fixedly connected to the contact module assembly (22). The outer surface of the upper end of the inner contact head (29) is slidably connected to a snap-fit ​​inner column (210). The bottom end of the snap-fit ​​inner column (210) is slidably connected to the inner cavity of the upper end of the connecting main column (25).

7. A modular circuit breaker with quickly replaceable contact modules according to claim 6, characterized in that: A second spring (211) is fixedly connected to the center of the inner cavity at the top of the snap-fit ​​inner post (210). The snap-fit ​​inner post (210) is fixedly connected to the top of the snap-fit ​​inner post (210) through the second spring (211). A snap-fit ​​groove (212) for tightly engaging with the limiting ball (28) is provided at the center of the outer surface of the snap-fit ​​inner post (210).

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