Safety cover of circuit breaker

Abstract

The utility model belongs to the field of electrical technology, in particular to a safety cover of a circuit breaker, which comprises a cover body comprising a cover plate used for covering the upper part of a terminal connection space of the circuit breaker and an insertion plate which extends downwards from the lower surface of the cover plate and can be inserted into the terminal connection space; the guide part is arranged on the plugboard, and the guide part is matched with a guide structure preset in the circuit breaker terminal connection space so as to guide the cover body to move along the installation direction; and the lock catch assembly comprises at least one elastic clamping tongue arranged on the side wall of the plug board and an unlocking piece associated with the elastic clamping tongue, the elastic clamping tongue is clamped with a preset locking opening in the circuit breaker when the cover body moves to a preset position in the installation direction, and the unlocking piece is used for enabling the elastic clamping tongue to generate elastic deformation and be separated from the locking opening. According to the utility model, through the above structure, physical isolation of a circuit breaker terminal connection space is realized, accurate installation and stable locking of the cover body are achieved, and targeted protection is provided for a terminal connection area.

Description

Technical Field

[0001] This utility model belongs to the field of electrical technology, and specifically refers to a safety cover for a circuit breaker. Background Technology

[0002] Circuit breakers are core protective electrical appliances in low-voltage power distribution and consumption systems, and are widely used in industrial, construction, and new energy scenarios. They include DC circuit breakers adapted to DC circuits and DC circuit breakers that need to cope with higher arc extinguishing difficulties. Both types of circuit breakers can interrupt the current when the circuit is overloaded or short-circuited, to avoid equipment damage and prevent safety accidents, and ensure the safe operation of the circuit.

[0003] The terminal connection space of existing circuit breakers is the area where conductors connect to internal conductive components, making it susceptible to arcing due to loose conductors or high contact resistance. However, most circuit breakers lack dedicated protection for this area. While some circuit breakers have simple covers, these often suffer from inaccurate installation positioning, unreliable locking, and inconvenient disassembly, failing to provide effective protection while ensuring ease of operation and reliable maintenance. Therefore, a protective structure for the circuit breaker terminal connection space is urgently needed to ensure rapid disassembly and secure locking. Utility Model Content

[0004] This invention provides a circuit breaker safety cover that includes a cover body, a guide portion on the insert plate, and a locking assembly, thereby achieving physical isolation of the terminal connection space, accurate installation, and secure locking, thus solving the problems mentioned in the background art.

[0005] The purpose of this utility model is achieved as follows: a safety cover for a circuit breaker, comprising:

[0006] The cover includes a cover plate for covering the space above the circuit breaker terminal connection, and an insert plate extending downward from the lower surface of the cover plate and insertable into the terminal connection space.

[0007] A guide portion is provided on the insert plate, and the guide portion cooperates with a pre-set guide structure in the circuit breaker terminal connection space to guide the cover to move along the installation direction;

[0008] The locking assembly includes at least one elastic latch disposed on the side wall of the insert plate, and an unlocking member associated with the elastic latch. When the cover moves to a predetermined position along the installation direction, the elastic latch engages with a preset locking slot on the circuit breaker. The unlocking member is used to cause the elastic latch to elastically deform and disengage from the locking slot.

[0009] The present invention is further configured such that the guide portion is a guide protrusion formed on the insert plate.

[0010] The present invention is further configured such that the elastic latch includes:

[0011] The cantilever has a fixed end connected to the side wall of the insert plate and a free end extending along the installation direction.

[0012] The buckle connects to the free end of the cantilever and engages with the locking port when in a predetermined position.

[0013] The present invention is further configured such that the unlocking component includes:

[0014] The transmission section is connected to the cantilever.

[0015] The operating section is connected to the transmission section and extends above the cover plate;

[0016] By operating the operating section, the cantilever can be moved so that the latch can disengage from the locking port.

[0017] The present invention is further configured such that a pressing plate is formed at the top of the operating section to facilitate finger manipulation.

[0018] The present invention is further provided that the surface of the pressing plate is provided with anti-slip texture.

[0019] The present invention is further configured such that the elastic latches are configured as two, which are arranged opposite to each other on both sides of the insert plate.

[0020] The present invention is further provided that both the insert plate and the cover plate have heat dissipation holes on their surfaces.

[0021] By adopting the above technical solution, the beneficial effects that this utility model can achieve are:

[0022] 1. By covering the terminal connection space with a cover plate and inserting a plate into the terminal connection space, physical isolation of the area is achieved, arcing is suppressed, and the safety protection performance of the terminal connection area is improved.

[0023] 2. By cooperating with the pre-set guide structure of the circuit breaker through the guide part on the plug plate, the cover is guided to move accurately along the installation direction, ensuring that the cover accurately covers the terminal connection space, avoiding protection failure due to installation deviation, and improving the installation reliability of the safety cover.

[0024] 3. By engaging the elastic latch of the locking assembly with the circuit breaker locking port and then disengaging the elastic latch with the unlocking component, the cover can be securely locked and easily unlocked after installation, preventing accidental detachment and protection failure, and improving the stability of the safety cover during use. Attached Figure Description

[0025] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0026] Figure 2 This is an exploded structural diagram of the present invention;

[0027] Figure 3 This is a utility model Figure 2 A magnified structural diagram of part A;

[0028] Figure 4 This is a cross-sectional structural diagram of the present invention;

[0029] Figure 5 This is a utility model Figure 4 A magnified structural diagram of part B.

[0030] The attached figures are labeled as follows: 1. Circuit breaker; 2. Terminal connection space; 3. Cover; 30. Cover plate; 31. Insert plate; 4. Guide section; 40. Guide protrusion; 5. Guide structure; 6. Locking assembly; 60. Elastic latch; 600. Cantilever; 601. Snap-on; 61. Unlocking component; 610. Transmission section; 611. Operating section; 7. Locking stop; 8. Pressing plate; 9. Anti-slip texture; 10. Heat dissipation hole. Detailed Implementation

[0031] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. See also: Figure 1-5 :

[0032] Example 1:

[0033] This embodiment provides a safety cover for a circuit breaker, including:

[0034] The cover 3 includes a cover plate 30 for covering the upper part of the terminal connection space 2 of the circuit breaker 1, and an insert plate 31 extending downward from the lower surface of the cover plate 30 and insertable into the terminal connection space 2;

[0035] The guide part 4 is provided on the insert plate 31. The guide part 4 cooperates with the guide structure 5 preset in the terminal connection space 2 of the circuit breaker 1 to guide the cover 3 to move along the installation direction.

[0036] The locking assembly 6 includes at least one elastic latch 60 disposed on the side wall of the insert plate 31, and an unlocking member 61 associated with the elastic latch 60. When the cover 3 moves to a predetermined position along the installation direction, the elastic latch 60 engages with a preset locking slot 7 on the circuit breaker 1. The unlocking member 61 is used to cause the elastic latch 60 to elastically deform and disengage from the locking slot 7.

[0037] The terminal connection space 2 accommodates the connection of wires to the internal conductive components of the circuit breaker 1, and is used to organize wiring, prevent the connection parts from being exposed, and provide operating space. Its structure is a chamber of the circuit breaker 1, mostly a rectangular chamber with an outward opening. It is a channel for wire access, part of the circuit breaker 1, and is connected to the internal conductive system.

[0038] The cover plate 30 is used to form a top and bottom protective enclosure for the terminal connection space 2, preventing arc escape and foreign object intrusion; it includes an integrally formed cover plate 30 and a plug plate 31, the overall shape of which is adapted to the opening and internal contour of the terminal connection space 2, and cooperates with the circuit breaker 1 through the locking assembly 6.

[0039] The cover plate 30 is used to cover the opening above the terminal connection space 2 to prevent foreign objects from falling in, isolate personnel from accidental contact, and block the upward flow of electric arc; its structure is a plate-shaped structure adapted to the opening above the terminal connection space 2, which can completely cover the opening; it is located at the top of the cover body 3, and after installation, it fits the upper edge of the terminal connection space 2 and is fixed together with the cover body 3.

[0040] The insert plate 31 is used to insert into the terminal connection space 2 to form an internal protective barrier to block the spread of electric arc and to provide an installation carrier for the guide part 4 and the elastic latch 60. Its structure is a plate-shaped structure that adapts to the cross-section of the terminal connection space 2, extending downward from the lower surface of the cover plate 30 and completely extending into the terminal connection space 2.

[0041] The guide section 4, in conjunction with the guide structure 5 of the circuit breaker 1, determines the installation path of the cover 3, preventing the cover 3 from shifting during installation and ensuring that the insert plate 31 is inserted and the latch is aligned with the locking slot 7. Through its cooperation with the guide structure 5, it enables the cover 3 to move stably along the installation direction. The guide structure 5, in conjunction with the guide section 4, guides and positions the cover 3, providing a "track" for its installation. Its structure consists of protrusions or grooves on the inner wall of the terminal connection space 2, with a shape complementary to the guide section, and is integrally formed with the circuit breaker 1.

[0042] The locking assembly 6 is used to fix and separate the cover 3 from the circuit breaker 1, ensuring stable installation and convenient maintenance and disassembly. It consists of an interrelated elastic latch 60 and an unlocking component 61. The elastic latch 60 engages with the locking port 7 of the circuit breaker 1 to fix the cover 3, preventing the cover 3 from shifting or falling off and ensuring stable protection. The unlocking component 61 drives the elastic latch 60 to deform, causing the latch 601 to disengage from the locking port 7, providing a convenient unlocking path without additional tools. The locking port 7 cooperates with the elastic latch 60 and the latch 601 to provide a locking engagement point, restricting the movement of the cover 3 through mechanical engagement. It corresponds to the elastic latch 60 and is located in the predetermined installation position of the cover 3, integrally formed with the circuit breaker 1.

[0043] The predetermined position refers to the state where the cover 3 moves along the installation direction until the cover plate 30 completely covers the upper opening of the terminal connection space 2, and the insert plate 31 is fully inserted into the terminal connection space 2, while the elastic latch 60 and the locking port 7 are accurately aligned and engaged.

[0044] During installation, the above design involves aligning the guide section 4 of the insert plate 31 with the guide structure 5 of the circuit breaker 1, pushing the cover 3 along the installation direction, and guiding the guide section 4 along the guide structure 5; the insert plate 31 gradually extends into the terminal connection space 2, and the cover 30 simultaneously approaches; when the elastic latch 60 touches the periphery of the locking stop 7, it is deformed by compression, and after being pushed to the predetermined position, the latch returns to its original shape, causing the latch 601 to engage with the locking stop 7, completing the locking, and the safety cover enters the protective state. During disassembly, the operating section 611 of the unlocking component 61 on the cover 30 is operated, and the force is transmitted to the latch through the transmission section 610, causing it to deform, and the latch 601 disengages from the locking stop 7; the cover 3 is pulled in the opposite direction, the guide section 4 slides in the opposite direction, the insert plate 31 is pulled out, the cover 30 is disengaged, and the safety cover is separated from the circuit breaker 1.

[0045] The guide part 4 is a guide protrusion 40 formed on the insert plate 31. The purpose of the above design is to provide clear guidance for the installation of the cover 3 by setting the guide part 4 as a guide protrusion 40 on the insert plate 31. The guide protrusion 40 is a long strip structure protruding from the surface of the insert plate 31, integrally formed with the insert plate 31, and can cooperate with the groove-shaped guide structure 5 in the terminal connection space 2 of the circuit breaker 1. The protrusion is chosen instead of the groove for two reasons: first, it eliminates the need to cut grooves in the insert plate 31, which avoids weakening the structural strength of the insert plate 31 and reduces the risk of breakage; second, the protrusion fits stably with the groove, is not easy to get stuck due to dust accumulation, and the protruding shape makes it easy to intuitively align the installation direction, reducing the difficulty of operation, ensuring that the cover 3 is inserted smoothly, and ensuring the protective effect.

[0046] The elastic latch 60 includes a cantilever 600 and a buckle 601. The fixed end of the cantilever 600 is connected to the side wall of the insert plate 31, and the free end extends along the installation direction. The buckle 601 is connected to the free end of the cantilever 600 and engages with the locking port 7 when it is in a predetermined position. The purpose of the above design is to achieve stable locking of the cover 3 after it is installed in place by setting the elastic latch 60 to a structure containing the cantilever 600 and the buckle 601. The cantilever 600 is a long strip structure with one end fixed and the other end elastically deformable. The fixed end can be glued to the side wall of the insert plate 31, and the free end extends along the installation direction of the cover 3. The buckle 601 is a protrusion structure connected to the free end of the cantilever 600. Its shape is adapted to the locking port 7 of the circuit breaker 1, and it can engage with the locking port 7 when the cover 3 reaches the predetermined position. In this structure, the elongated shape of the cantilever 600 provides sufficient elastic deformation space, ensuring that the buckle 601 can be compressed and contracted when the cover 3 is installed, and automatically rebound and lock into the locking slot 7 after reaching the predetermined position; the buckle 601 and the cantilever 600 are usually integrally molded to ensure the locking strength, prevent the buckle 601 from falling off and causing locking failure, thereby preventing the cover 3 from accidentally shifting or falling off, and maintaining continuous protection of the terminal connection space 2 of the circuit breaker 1.

[0047] The unlocking component 61 includes a transmission section 610 and an operating section 611. The transmission section 610 is connected to the cantilever 600, and the operating section 611 is connected to the transmission section 610 and extends above the cover plate 30. By operating the operating section 611, the cantilever 600 can be moved to disengage the latch 601 from the locking port 7. The purpose of the above design is to facilitate the operation of the elastic latch 60 by setting the unlocking component 61 to include the transmission section 610 and the operating section 611, so as to release the lock between the cover 3 and the circuit breaker 1 and facilitate the disassembly of the cover 3. The transmission section 610 is a rod-shaped or plate-shaped structure adapted to the path from the insert plate 31 to the cover plate 30. One end is integrally formed with the cantilever 600 or connected with a pin, and the other end extends towards the cover plate 30. The operating section 611 is a plate-shaped structure connected to the transmission section 610, extending entirely above the cover plate 30, and integrally formed with the transmission section 610. In this structure, the transmission section 610 can transmit operating force, while the operating section 611 provides the user with an easy-to-apply force part. When the operating section 611 is operated, the cantilever 600 can be moved through the transmission section 610, causing the buckle 601 to disengage from the locking port 7. Unlocking can be completed without additional tools. At the same time, the design of the operating section 611 being located above the cover plate 30 avoids contact with the terminal connection space 2 during operation, ensuring safety during operation.

[0048] The top of the operating section 611 has a pressing plate 8 that facilitates finger manipulation. The purpose of this design is to provide a more easily accessible area for the user to apply force when operating the unlocking component 61 by setting the pressing plate 8 on the top of the operating section 611, thus reducing the difficulty of unlocking. The pressing plate 8 is a plate-like structure covering the top of the operating section 611, with an area larger than the cross-section of the top of the operating section 611. It is typically integrally formed with the operating section 611 or connected by screws. In this structure, the pressing plate 8 expands the operating contact area, allowing the finger to apply pressure or manipulation more easily without needing to precisely align with the operating section 611. Simultaneously, the rounded corner design improves the feel during operation, preventing discomfort or difficulty in applying force due to the small size of the operating section 611. This ensures that the user can smoothly move the operating section 611, the transmission section 610, and the cantilever 600 via the pressing plate 8, thereby unlocking the latch 601 from the locking port 7.

[0049] The surface of the pressing plate 8 is provided with anti-slip texture 9. The purpose of the above design is to enhance the friction between the fingers and the pressing plate 8 by setting anti-slip texture 9 on the surface of the pressing plate 8, so as to avoid slipping during operation. The anti-slip texture 9 is a concave-convex pattern formed on the surface of the pressing plate 8, such as parallel stripes, grid pattern, etc., and is integrally formed with the pressing plate 8. In this structure, the concave-convex pattern increases the roughness of the contact surface. When the fingers press or move the pressing plate 8, it can reduce the relative slippage between the fingers and the plate surface. Especially when the fingers are sweaty or oily, it can still ensure that the operating force is effectively transmitted to the pressing plate 8, and ensure that the pressing plate 8 can smoothly drive the operation section 611, the transmission section 610 and the cantilever 600 to move, so as to realize the unlocking action of the buckle 601 disengaging from the locking port 7.

[0050] Two elastic latches 60 are configured and positioned opposite each other on both sides of the insert plate 31. The purpose of this design is to make the locking of the cover 3 and the circuit breaker 1 more balanced and stable by setting two elastic latches 60 opposite each other on both sides of the insert plate 31, so as to avoid the cover 3 tilting or loosening due to force on one side. The two elastic latches 60 are located on the left and right sides of the insert plate 31 respectively, and are symmetrical in position. They are both connected to the side wall of the insert plate 31 through the fixed end of the cantilever 600, and the buckle 601 faces the locking port 7 on the inner wall of the terminal connection space 2 of the circuit breaker 1. This symmetrical layout allows the cover 3 to engage with the locking port 7 simultaneously on both sides via the buckle 601 after installation, forming an equal locking force from both sides of the insert plate 31. This prevents the cover 3 from shifting to one side or falling off due to vibration, accidental contact, or other factors. At the same time, it ensures that the force on both sides of the cover 3 is synchronized when unlocking, avoiding the cover 3 from tilting or getting stuck due to unlocking on one side first. It also ensures that the elastic latches 60 on both sides can disengage simultaneously when unlocking, allowing the cover 3 to be smoothly and straightly removed, greatly improving the smoothness of the disassembly operation and the user experience.

[0051] Both the insert plate 31 and the cover plate 30 have heat dissipation holes 10 on their surfaces. The purpose of this design is to protect the terminal connection space 2 while preventing heat accumulation from affecting its use by providing heat dissipation holes 10 on the surfaces of the insert plate 31 and the cover plate 30. The heat dissipation holes 10 are perforated structures that penetrate the thickness of the insert plate 31 and the cover plate 30, and are mostly circular or polygonal in shape, forming an integral structure with the insert plate 31 and the cover plate 30. This design allows the heat generated by the wires and terminal connection parts in the terminal connection space 2 to circulate with the outside air through the heat dissipation holes 10, reducing heat accumulation in the space. At the same time, the perforated structure does not compromise the overall protective properties of the insert plate 31 and the cover plate 30, preventing arcing and foreign object intrusion while also dissipating heat, preventing overheating from affecting the performance of the insulation components, and ensuring the stable use of the terminal connection space 2 of the circuit breaker 1.

[0052] During installation in this embodiment, the guide protrusion 40 on the insert plate 31 is first aligned with the preset groove in the terminal connection space 2 of the circuit breaker 1. The cover 3 is then pushed along the installation direction, causing the insert plate 31 to gradually insert into the terminal connection space 2, with the cover 30 covering the space. During this process, the guide protrusion 40 slides along the groove to guide the cover 3 to move smoothly. When the elastic latches 60 on both sides of the insert plate 31 contact the surrounding structure of the locking port 7 of the circuit breaker 1, the cantilever 600 of the latch is compressed and undergoes elastic deformation. After the cover 3 is pushed to the predetermined position, the cantilever 600 recovers its deformation, causing the buckle 601 at the free end to engage with the locking port 7, thus realizing the connection between the cover 3 and the circuit breaker 1. The circuit breaker 1 is locked; during daily use, the heat dissipation holes 10 on the surface of the plug plate 31 and the cover plate 30 allow the heat generated in the terminal connection space 2 to circulate with the outside air, avoiding heat accumulation; when it is necessary to remove the cover 3, the finger moves the pressing plate 8 with anti-slip texture 9 on the top of the operating section 611, the operating section 611 drives the connected transmission section 610, the transmission section 610 pulls the cantilever 600 of the elastic latch 60 to deform again, so that the latch 601 is disengaged from the locking port 7, and the cover 3 is pulled in the opposite direction of installation. The plug plate 31 slides out of the terminal connection space 2 along the groove with the guide protrusion 40, and the cover 30 is disengaged at the same time, completing the removal of the cover 3.

[0053] The above embodiments are merely preferred embodiments of the present utility model and are not intended to limit the scope of protection of the present utility model. Therefore, all equivalent changes made to the structure, shape, and principle of the present utility model should be covered within the scope of protection of the present utility model.

Claims

1. A safety cover for a circuit breaker, characterized in that, include: The cover (3) includes a cover plate (30) for covering the terminal connection space (2) of the circuit breaker (1) and an insert plate (31) extending downward from the lower surface of the cover plate (30) and insertable into the terminal connection space (2). The guide part (4) is provided on the plug plate (31). The guide part (4) cooperates with the guide structure (5) preset in the terminal connection space (2) of the circuit breaker (1) to guide the cover (3) to move along the installation direction. The latch assembly (6) includes at least one elastic latch (60) disposed on the side wall of the insert plate (31) and an unlocking member (61) associated with the elastic latch (60). When the cover (3) moves to a predetermined position along the installation direction, the elastic latch (60) engages with a preset locking slot (7) on the circuit breaker (1). The unlocking member (61) is used to cause the elastic latch (60) to elastically deform and disengage from the locking slot (7).

2. The safety cover of a circuit breaker according to claim 1, characterized in that, The guide part (4) is a guide protrusion (40) formed on the insert plate (31).

3. The safety cover for a circuit breaker according to claim 1, characterized in that, The resilient latch (60) includes: The cantilever (600) has a fixed end connected to the side wall of the insert plate (31) and a free end extending along the installation direction; The buckle (601) is connected to the free end of the cantilever (600) and engages with the locking port (7) in a predetermined position.

4. The safety cover of a circuit breaker according to claim 3, characterized in that, The unlocking component (61) includes: The transmission section (610) is connected to the cantilever (600); The operating section (611) is connected to the transmission section (610) and extends above the cover plate (30); By operating the operating segment (611), the cantilever (600) can be moved so that the buckle (601) disengages from the locking port (7).

5. A safety cover for a circuit breaker according to claim 4, characterized in that, The top of the operating section (611) has a pressing plate (8) that is easy to flick with a finger.

6. A safety cover for a circuit breaker according to claim 5, characterized in that, The surface of the pressing plate (8) is provided with anti-slip texture (9).

7. The safety cover of a circuit breaker according to claim 1, characterized in that, Two elastic latches (60) are configured and are positioned opposite each other on both sides of the insert plate (31).

8. A safety cover for a circuit breaker according to claim 1, characterized in that, Both the insert plate (31) and the cover plate (30) are provided with heat dissipation holes (10).

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