A circuit breaker protection structure
By designing a protective cover and limit block in the circuit breaker to block the gap between the handle and the middle cover, the problems of arc leakage and contaminant intrusion are solved, thereby improving the safety and service life of the circuit breaker.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHEJIANG TENGEN ELECTRIC
- Filing Date
- 2025-05-21
- Publication Date
- 2026-05-26
AI Technical Summary
The gap between the handle and the middle cover of a traditional circuit breaker allows high-temperature electric arcs to escape and contaminants to enter, threatening equipment safety and shortening product life.
A circuit breaker protection structure including a middle cover, a handle, and a protective cover is designed. The protrusion of the protective cover cooperates with the limiting block to block the gap between the handle and the middle cover, preventing arc leakage and contaminant entry.
It improves the safety and reliability of circuit breakers, prevents arcing and contaminant intrusion, and extends the service life of the products.
Smart Images
Figure CN224288181U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of low-voltage electrical technology, specifically to a circuit breaker protection structure. Background Technology
[0002] Due to space constraints, traditional circuit breakers have a large gap between the handle and the cover when the handle is in the latched or closed position. This gap leads to two main technical defects: First, when the circuit breaker interrupts a short-circuit current, the high-temperature arc generated inside may escape through the gap between the handle and the cover, causing external insulation degradation and even triggering a secondary short circuit, seriously threatening equipment and personnel safety. Second, during long-term use, external dust, moisture, and other contaminants can easily enter the circuit breaker through the gap, leading to contact oxidation, mechanism jamming, or decreased insulation performance, shortening product life and increasing maintenance costs. Utility Model Content
[0003] Therefore, the technical problem to be solved by this utility model is to overcome the defects in the prior art, thereby providing a circuit breaker protection structure that blocks the gap.
[0004] Therefore, this utility model provides a circuit breaker protection structure, including a middle cover, a handle, and a protective cover. The middle cover has a first through hole for the handle to move, and a first limiting block disposed near the middle of the inner wall of the first through hole. The handle is rotatable relative to the middle cover, and has a handle body and an operating rod integrally connected to the handle body. The handle body is located inside the middle cover, and the operating rod extends from the first through hole to the outside of the middle cover. The handle has a re-lock position, in which a first notch is provided between one side of the handle and the first through hole of the middle cover. The protective cover is driven by the handle and is movable relative to the handle. The side wall of the protective cover is provided with a boss that can cooperate with the first limiting block. In the re-lock position, the boss of the protective cover abuts against the first limiting block, and the protective cover is used to cover the first notch.
[0005] The middle cover has a second limiting block adjacent to the first notch, the handle has a closed position, in which the boss abuts against the second limiting block, and the protective cover is used to cover the second notch between the other side of the handle and the first through hole of the middle cover.
[0006] The protective cover has a second through hole in the middle for the operating rod to extend out. The operating rod can move within the second through hole and can drive the protective cover to move by abutting against the inner wall of the second through hole. The protective cover has a first protective part and a second protective part extending outward from both sides of the handle body, respectively. In the re-locking position, the first protective part is used to cover the first notch; in the closing position, the second protective part is used to cover the second notch.
[0007] The protective cover is slidably mounted on the handle via a slide rail structure.
[0008] The slide rail structure includes: two first slide grooves, respectively located on both sides of the handle body; two bosses, respectively located on both sides of the protective cover, and the inner wall of the bosses is provided with slide rods that slide in cooperation with the first slide grooves.
[0009] The top surface of the handle body is formed with a second slider, and the protective cover is formed with a second groove that is adapted to the second slider.
[0010] The middle cover has a second limiting block adjacent to the first notch, and the handle has a closed position, in which the boss abuts against the second limiting block.
[0011] The second notch is located between the other side of the handle and the first through hole of the middle cover. When the brake is closed, the end of the handle away from the protective cover is provided with a shielding part for blocking the second notch.
[0012] The technical solution of this utility model has the following advantages:
[0013] 1. The circuit breaker protection structure provided by this utility model includes a middle cover, a handle, and a protective cover. The protective cover is driven by the handle and can move relative to the handle. The side wall of the protective cover is provided with a boss that can cooperate with the first limiting block. In the re-locking position, the boss of the protective cover abuts against the first limiting block. The protective cover is used to block the first notch, thereby playing the role of dust prevention and arc prevention, improving safety and reliability, and extending the service life of the product.
[0014] 2. The circuit breaker protection structure provided by this utility model has a second through hole in the middle of the protective cover for the operating rod to extend out. The operating rod can move within the second through hole and can drive the protective cover to move by abutting against the inner wall of the second through hole. The protective cover has a first protective part and a second protective part extending outward from both sides of the handle body, respectively. In the re-engaged position, the first protective part is used to cover the first notch; in the closed position, the second protective part is used to cover the second notch. During assembly, the operating rod of the handle is simply passed through the second through hole in the middle of the protective cover. The above-mentioned protective cover has the advantage of simple structure.
[0015] 3. The circuit breaker protection structure provided by this utility model has a protective cover that is slidably mounted on the handle via a slide rail structure. The slide rail structure includes: two first slide grooves, which are respectively located on both sides of the handle body; and two bosses, which are respectively located on both sides of the protective cover. The inner wall of the bosses is provided with slide rods that slide in cooperation with the first slide grooves. The first slide grooves and bosses that cooperate with each other have the advantage of simple structure. Attached Figure Description
[0016] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.
[0017] Figure 1 A perspective view of the first embodiment of the circuit breaker (handle in the re-engaged position);
[0018] Figure 2 for Figure 1 Cross-sectional view;
[0019] Figure 3 This is a cross-sectional view of a circuit breaker (with the handle in the closed position).
[0020] Figure 4 This is an exploded structural diagram of the first embodiment of the handle and protective cover;
[0021] Figure 5 This is a three-dimensional view of the middle cover;
[0022] Figure 6 This is an assembly diagram of the second embodiment of the handle and the protective cover;
[0023] Figure 7 This is a schematic diagram of the exploded structure of the second embodiment of the handle and protective cover;
[0024] Figure 8 Another perspective view showing the handle and protective cover rotated through a certain angle;
[0025] Figure 9 This is a cross-sectional view of a second embodiment of a circuit breaker (with the handle in the re-engaged position);
[0026] Figure 10 This is a cross-sectional view of a second embodiment of a circuit breaker (with the handle in the closed position).
[0027] Explanation of reference numerals in the attached drawings: 1. Middle cover; 3. First through hole; 4. First limiting block; 5. Handle; 6. Handle body; 7. Operating rod; 8. Protective cover; 9. Boss; 11. First notch; 12. Second notch; 13. Second limiting block; 14. Second through hole; 15. First protective part; 16. Second protective part; 17. First slide groove; 18. Slide rod; 19. Second slider; 20. Second slide groove; 21. Covering part. Detailed Implementation
[0028] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.
[0029] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.
[0030] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0031] Furthermore, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.
[0032] Example 1
[0033] This embodiment provides a circuit breaker protection structure, such as Figure 1 and Figure 2 As shown, it includes a middle cover 1, a handle 5, and a protective cover 8.
[0034] Middle cover 1, such as Figure 2 and Figure 5As shown, it has a first through hole 3 for the handle 5 to move, and a first limiting block 4 disposed near the middle of the inner wall of the first through hole 3.
[0035] Handle 5, rotatable relative to the middle cover 1, has a handle body 6 and an operating rod 7 integrally connected to the handle body 6. The handle body 6 is located inside the middle cover 1, and the operating rod 7 extends from the first through hole 3 to the outside of the middle cover 1. The handle 5 has the following characteristics: Figure 2 The position shown is the re-cutting position, as follows: Figure 2 and Figure 3 As shown, a first notch 11 and a second notch 12 are respectively provided between the two sides of the handle 5 and the first through hole 3 of the middle cover 1, and the middle cover 1 has a second limiting block 13 adjacent to the first notch 11.
[0036] The protective cover 8 is driven by the handle 5 and can move relative to the handle 5. The side wall of the protective cover 8 is provided with a protrusion 9 that can cooperate with the first limiting block 4. In this embodiment, as... Figure 4 As shown, the protective cover 8 has a second through hole 14 in the middle for the operating rod 7 to extend out. The operating rod 7 can move within the second through hole 14 and can drive the protective cover 8 to move by abutting against the inner wall of the second through hole 14. The protective cover 8 has a first protective part 15 and a second protective part 16 extending outward from both sides of the handle body 6, respectively. Figure 2 When the protective cover 8 is in the re-fastening position as shown, the protrusion 9 abuts against the first limiting block 4, and the first protective part 15 of the protective cover 8 is used to cover the first notch 11; in such a position... Figure 3 When the circuit is closed as shown, the boss 9 abuts against the second limiting block 13, and the second protective part 16 of the protective cover 8 is used to block the second notch 12.
[0037] Example 2
[0038] This embodiment provides a circuit breaker protection structure, such as Figure 9 and Figure 10 As shown, it includes a middle cover 1, a handle 5, and a protective cover 8.
[0039] The middle cover 1 has a first through hole 3 for the handle 5 to move, and a first limiting block 4 disposed near the middle of the inner wall of the first through hole 3.
[0040] The handle 5 is rotatable relative to the middle cover 1. The handle 5 has a handle body 6 and an operating rod 7 integrally connected to the handle body 6. The handle body 6 is located inside the middle cover 1. The operating rod 7 extends from the first through hole 3 to the outside of the middle cover 1. The handle 5 has a re-fastening position. In the re-fastening position, a first notch 11 and a second notch 12 are respectively provided between the two sides of the handle 5 and the first through hole 3 of the middle cover 1. The middle cover 1 has a second limiting block 13 adjacent to the first notch 11.
[0041] The protective cover 8 is driven by the handle 5 and can move relative to the handle 5. The side wall of the protective cover 8 is provided with a protrusion 9 that can cooperate with the first limiting block 4. In this embodiment, the protective cover 8 is slidably mounted on the handle 5 via a slide rail structure, such as... Figure 6 , Figure 7 and Figure 8 As shown, the slide rail structure includes: two first slide grooves 17, respectively disposed on both sides of the handle body 6; two protrusions 9, respectively disposed on both sides of the protective cover 8, and a slide rod 18 on the inner wall of the protrusion 9 that slides in cooperation with the first slide grooves 17; a second slider 19 is formed on the top surface of the handle body 6, and a second slide groove 20 adapted to the second slider 19 is formed on the protective cover 8; the middle cover 1 has a second limiting block 13 adjacent to the first notch 11, wherein, in such a way... Figure 9 When the protective cover 8 is in the re-fastening position as shown, the protrusion 9 abuts against the first limiting block 4, and the protective cover 8 is used to cover the first notch 11; in the case of Figure 10 When the switch is closed as shown, the boss 9 abuts against the second limiting block 13, and the end of the handle 5 away from the protective cover 8 is provided with a blocking part 21 for blocking the second notch 12.
[0042] The circuit breaker protection structure provided by this utility model includes a middle cover 1, a handle 5, and a protective cover 8. The protective cover 8 is driven by the handle 5 and can move relative to the handle 5. The side wall of the protective cover 8 is provided with a boss 9 that can cooperate with the first limiting block 4. When in the re-locked position, the boss 9 of the protective cover 8 abuts against the first limiting block 4. The protective cover 8 is used to cover the first notch 11, thereby playing a role in dust prevention and arc prevention, improving safety and reliability, and extending the service life of the product.
[0043] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.
Claims
1. A circuit breaker guard structure, characterized by, include: The middle cover (1) has a first through hole (3) for the handle (5) to move, and a first limiting block (4) disposed near the middle of the inner wall of the first through hole (3); The handle (5) is rotatable relative to the middle cover (1). The handle (5) has a handle body (6) and an operating rod (7) integrally connected to the handle body (6). The handle body (6) is located inside the middle cover (1). The operating rod (7) extends from the first through hole (3) to the outside of the middle cover (1). The handle (5) has a re-fastening position. In the re-fastening position, a first notch (11) is provided between one side of the handle (5) and the first through hole (3) of the middle cover (1). The protective cover (8) is driven by the handle (5) and can move relative to the handle (5). The side wall of the protective cover (8) is provided with a boss (9) that can cooperate with the first limiting block (4). In the re-fastening position, the protrusion (9) of the protective cover (8) abuts against the first limiting block (4), and the protective cover (8) is used to cover the first notch (11).
2. The circuit breaker guard structure of claim 1, wherein, The middle cover (1) has a second limiting block (13) adjacent to the first notch (11), the handle (5) has a closed position, in which the boss (9) abuts against the second limiting block (13), and the protective cover (8) is used to cover the second notch (12) between the other side of the handle (5) and the first through hole (3) of the middle cover (1).
3. The circuit breaker guard structure of claim 2, wherein, The protective cover (8) has a second through hole (14) in the middle for the operating rod (7) to extend out. The operating rod (7) can move in the second through hole (14) and can drive the protective cover (8) to move by abutting against the inner wall of the second through hole (14). The protective cover (8) has a first protective part (15) and a second protective part (16) extending outward from both sides of the handle body (6). In the re-clamping position, the first protective part (15) is used to block the first notch (11); in the closing position, the second protective part (16) is used to block the second notch (12).
4. The circuit breaker protection structure according to claim 1, characterized in that, The protective cover (8) is slidably mounted on the handle (5) via a slide rail structure.
5. The circuit breaker protection structure according to claim 4, characterized in that, The slide rail structure includes: Two first grooves (17) are respectively provided on the two sides of the handle body (6); Two protrusions (9) are respectively provided on both sides of the protective cover (8), and the inner wall of the protrusion (9) is provided with a slide rod (18) that slides in cooperation with the first slide groove (17).
6. The circuit breaker protection structure according to claim 4, characterized in that, The top surface of the handle body (6) is formed with a second slider (19), and the protective cover (8) is formed with a second groove (20) that is adapted to the second slider (19).
7. The circuit breaker protection structure according to any one of claims 4-6, characterized in that, The middle cover (1) has a second limiting block (13) adjacent to the first notch (11), and the handle (5) has a closed position. In the closed position, the boss (9) abuts against the second limiting block (13).
8. The circuit breaker protection structure according to claim 7, characterized in that, The handle (5) has a second notch (12) between the other side of the handle (5) and the first through hole (3) of the middle cover (1). When the brake is closed, the end of the handle (5) away from the protective cover (8) is provided with a shielding part (21) for shielding the second notch (12).