A plastic shell circuit breaker with overload alarm and optional trip function

Abstract

The utility model relates to the technical field of circuit breaker, and disclose a kind of overload alarm undetach function selectable moulded case circuit breaker, including circuit breaker main body and wiring terminal being installed on circuit breaker main body, the top and bottom of circuit breaker main body are all fixed with mounting frame, the side of mounting frame close to circuit breaker main body is fixed with multiple pivots, the number and position of pivot are matched with the number and position of wiring terminal, the outside sleeve of each pivot is equipped with rotating block, the side of rotating block away from pivot is slidably connected with protection plate, the side of protection plate away from pivot is equipped with fixed component. This kind of overload alarm undetach function selectable moulded case circuit breaker, the wiring end and side edge of wiring terminal are protected by protection plate and fixed plate, so as to avoid dust into wiring terminal inside, lead to wiring terminal be corroded damage.

Description

Technical Field

[0001] This utility model relates to the field of circuit breaker technology, specifically to a molded case circuit breaker with optional overload alarm and non-tripping function. Background Technology

[0002] Residual current circuit breakers, also known as leakage circuit breakers, are protective devices used to prevent safety accidents caused by leakage current in electrical installations. They mainly work by monitoring the difference between the current in the phase line and the neutral line in the circuit. Current circuit breakers have an optional overload alarm without tripping function. When the main circuit load is overloaded, it can output an alarm signal, but when the main circuit load has a short circuit fault, it can immediately disconnect the circuit.

[0003] For example, patent CN210778440U discloses a molded case circuit breaker with optional overload alarm non-tripping function, including a base, an operating mechanism, a traction rod mounted on the operating mechanism, and a thermal overload mechanism. The thermal overload mechanism is linked to a thermal overload alarm signal acquisition module. The key feature is that it also includes an adjustment device, which can drive the adjustment rod in the thermal overload alarm signal acquisition module to correspondingly link or disengage with the traction rod, thus switching between the circuit breaker's overload alarm tripping or overload alarm non-tripping functions. The overload alarm non-tripping function of the molded case circuit breaker can be selected according to requirements. Even in the overload alarm non-tripping state, it can still achieve short-circuit instantaneous protection to avoid major accidents. The entire structure is simple, reliable, and easy to operate.

[0004] The aforementioned circuit breakers still have certain defects: Currently, the terminals at the top and bottom of the circuit breaker are completely exposed. During normal operation of the circuit breaker, static electricity will be generated on the surface of the terminals due to the electric field. This makes it easy for dust and impurities in the surrounding environment to be attracted to the terminals. Over time, these attached dust and impurities will not only affect the cleanliness of the terminals, but may also cause corrosion, thereby damaging the performance of the terminals and shortening the service life of the circuit breaker. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a molded case circuit breaker with optional overload alarm and non-tripping function, which makes the terminals less susceptible to dust accumulation and corrosion damage, resulting in a longer service life.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a molded case circuit breaker with optional overload alarm and non-tripping function, comprising a circuit breaker body and terminals mounted on the circuit breaker body. A mounting frame is fixedly connected to both the top and bottom of the circuit breaker body. Multiple rotating shafts are fixedly connected to the side of the mounting frame closest to the circuit breaker body. The number and position of the rotating shafts match the number and position of the terminals. Each rotating shaft has a rotating block on its outer sleeve. A protective plate is slidably connected to the side of the rotating block away from the rotating shaft. A fixing component is installed on the side of the protective plate away from the rotating shaft.

[0007] Furthermore, the fixing assembly includes a fixing plate, a sliding rod, and an insulating elastic element. A plurality of equally spaced fixing plates are slidably connected to the end of the protective plate away from the rotating shaft. A sliding rod is fixedly connected to the side of the fixing plate away from the rotating shaft. The sliding rod is slidably connected to the protective plate. An insulating elastic element is sleeved on the end of the sliding rod away from the protective plate. One end of the insulating elastic element is fixedly connected to the fixing plate, and the other end of the insulating elastic element is fixedly connected to the protective plate.

[0008] Furthermore, multiple fixing frames are fixed to the top and bottom of the circuit breaker body. The number and position of the fixing frames match the number and position of the protective plates. The fixing frames are U-shaped, and elastic locking blocks matching the protective plates are fixed to both ends of the fixing frames.

[0009] Furthermore, the protective plate has an anti-detachment groove on the side away from the fixed frame, and an anti-detachment block is slidably connected inside the anti-detachment groove. A push plate is fixed to the side wall of the anti-detachment block, and the push plate matches the elastic locking block.

[0010] Furthermore, the end of the anti-detachment block is trapezoidal, and the push plate is T-shaped.

[0011] Furthermore, a handle is fixed to the side of the push plate away from the anti-detachment block.

[0012] Furthermore, a groove is provided at the end of the rotating block away from the rotating shaft, and a slider is slidably connected inside the groove, the slider being fixedly connected to the protective plate.

[0013] Compared with the prior art, the present invention has the following beneficial effects: This type of molded case circuit breaker with optional overload alarm non-tripping function protects the terminals and sides of the wiring terminals with protective plates and fixing plates, thereby preventing dust from entering the wiring terminals and causing corrosion and damage. At the same time, after the wire is inserted into the wiring terminal, the fixing plate and fixing frame will clamp and fix the wire, making it less likely for the wire to fall out of the wiring terminal, making the circuit breaker body more stable during operation. Attached Figure Description

[0014] Figure 1This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the installation frame of this utility model; Figure 3 This is a schematic diagram of the connection structure between the rotating block and the protective plate of this utility model; Figure 4 This is a schematic diagram of the structure of the fixing frame of this utility model; Figure 5 This is a schematic diagram of the push plate of this utility model.

[0015] In the diagram: 1. Circuit breaker body; 2. Terminal block; 3. Mounting frame; 4. Shaft; 5. Rotating block; 6. Slide groove; 7. Sliding block; 8. Protective plate; 9. Fixing frame; 10. Fixing plate; 11. Slide rod; 12. Insulating elastic element; 13. Anti-disengagement groove; 14. Anti-disengagement block; 15. Push plate; 16. Handle; 17. Elastic locking block. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0017] Please see Figure 1-5 A molded case circuit breaker with optional overload alarm and non-tripping function includes a circuit breaker body 1 and terminals 2 mounted on the circuit breaker body 1. Mounting frames 3 are fixed to the top and bottom of the circuit breaker body 1. Multiple rotating shafts 4 are fixed to the side of the mounting frame 3 near the circuit breaker body 1. The number and position of the rotating shafts 4 match the number and position of the terminals 2. Each rotating shaft 4 has a rotating block 5 on its outer sleeve. A protective plate 8 is slidably connected to the side of the rotating block 5 away from the rotating shaft 4. A fixing component is installed on the side of the protective plate 8 away from the rotating shaft 4.

[0018] The molded case circuit breaker with optional overload alarm non-tripping function in this utility model protects the terminals and sides of the wiring terminal 2 with a protective plate 8 and a fixing component, thereby preventing dust from entering the wiring terminal 2 and causing corrosion and damage, thus extending the service life of the wiring terminal 2. At the same time, after the wire is inserted into the wiring terminal 2, the fixing component clamps and fixes the wire, making it less likely for the wire to fall out of the wiring terminal 2, making the circuit breaker body 1 more stable during operation. In addition, the structure of the circuit breaker body 1 and wiring terminal 2 in this utility model is similar to the structure of a molded case circuit breaker with optional overload alarm non-tripping function disclosed in patent patent authorization announcement number CN210778440U, so it will not be described in detail here.

[0019] like Figure 1 and Figure 3As shown, the fixing assembly includes a fixing plate 10, a sliding rod 11, and an insulating elastic element 12. Multiple equidistantly distributed fixing plates 10 are slidably connected to one end of the protective plate 8 away from the rotating shaft 4. A sliding rod 11 is fixedly connected to one side of the fixing plate 10 away from the rotating shaft 4. The sliding rod 11 is slidably connected to the protective plate 8. An insulating elastic element 12 is sleeved on one end of the sliding rod 11 away from the protective plate 8. One end of the insulating elastic element 12 is fixedly connected to the fixing plate 10, and the other end of the insulating elastic element 12 is fixedly connected to the protective plate 8.

[0020] Specifically, when it is necessary to connect the guide wire to the inside of the terminal 2, the protective plate 8 can be rotated first so that the protective plate 8 is no longer in contact with the terminal 2. Then the wire can be connected to the inside of the terminal 2. After the wiring is completed, the protective plate 8 can be rotated back to its original position. At this time, the wire will block the fixing plate 10, and the fixing plate 10 will move away from the wire, so that the wire is between the fixing frame 9 and the fixing plate 10. At the same time, under the action of the insulating elastic element 12, the fixing plate 10 has a tendency to move towards the wire, thereby clamping and fixing the wire and preventing the wire from detaching from the terminal 2 on its own.

[0021] like Figure 1 and Figure 4 As shown, multiple fixing frames 9 are fixed to the top and bottom of the circuit breaker body 1. The number and position of the fixing frames 9 match the number and position of the protective plates 8. The fixing frames 9 are U-shaped, and elastic clips 17 matching the protective plates 8 are fixed to both ends of the fixing frames 9.

[0022] Specifically, when the protective plate 8 is rotated to a position flush with the mounting frame 3, the elastic locking block 17 will lock on both sides of the protective plate 8, thereby restricting the protective plate 8 and preventing it from shifting, which would cause the protective plate 8 to lose its protective effect.

[0023] like Figure 3 and Figure 5 As shown, the protective plate 8 has an anti-detachment groove 13 on the side away from the fixed frame 9. An anti-detachment block 14 is slidably connected inside the anti-detachment groove 13. A push plate 15 is fixed to the side wall of the anti-detachment block 14. The push plate 15 matches the elastic locking block 17.

[0024] Specifically, when it is necessary to rotate the protective plate 8 away from the terminal 2, the push plate 15 can be pushed, and the elastic block 17 can be pushed upward by the push plate 15, so that the elastic block 17 can no longer restrict the protective plate 8, making it easier for the protective plate 8 to rotate.

[0025] like Figure 3 and Figure 5 As shown, the end of the anti-detachment block 14 is trapezoidal, and the push plate 15 is T-shaped. The trapezoidal anti-detachment block 14 has a better restraining effect and can prevent the push plate 15 from being lost or damaged. At the same time, the T-shaped push plate 15 requires less material and has a lower cost.

[0026] like Figure 3 As shown, a handle 16 is fixedly attached to the side of the push plate 15 away from the anti-detachment block 14. Pushing the push plate 15 with the handle 16 makes it easier and less strenuous to move.

[0027] like Figure 3 As shown, a groove 6 is provided at the end of the rotating block 5 away from the rotating shaft 4, and a slider 7 is slidably connected inside the groove 6. The slider 7 is fixedly connected to the protective plate 8.

[0028] Specifically, the protective plate 8 is connected to the rotating block 5 through the slider 7 and the groove 6, making the installation and disassembly of the protective plate 8 simpler and more convenient. In this way, when the fixed plate 10 or the protective plate 8 has an adverse effect on the wiring of the terminal 2, the protective plate 8 and the fixed plate 10 can be removed at any time.

[0029] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention.

Claims

1. A molded case circuit breaker with optional overload alarm and non-tripping function, comprising a circuit breaker body (1) and terminals (2) mounted on the circuit breaker body (1), characterized in that, The top and bottom of the circuit breaker body (1) are fixedly connected to an installation frame (3). The side of the installation frame (3) close to the circuit breaker body (1) is fixedly connected to a plurality of rotating shafts (4). The number and position of the rotating shafts (4) match the number and position of the terminals (2). Each rotating shaft (4) is provided with a rotating block (5) on its outer sleeve. A protective plate (8) is slidably connected to the side of the rotating block (5) away from the rotating shaft (4). A fixing component is installed on the side of the protective plate (8) away from the rotating shaft (4).

2. A molded case circuit breaker with optional overload alarm and non-tripping function according to claim 1, characterized in that, The fixing assembly includes a fixing plate (10), a sliding rod (11), and an insulating elastic element (12). The end of the protective plate (8) away from the rotating shaft (4) is slidably connected to a plurality of equally spaced fixing plates (10). The side of the fixing plate (10) away from the rotating shaft (4) is fixedly connected to the sliding rod (11). The sliding rod (11) is slidably connected to the protective plate (8). The end of the sliding rod (11) away from the protective plate (8) is fitted with an insulating elastic element (12). One end of the insulating elastic element (12) is fixedly connected to the fixing plate (10), and the other end of the insulating elastic element (12) is fixedly connected to the protective plate (8).

3. A molded case circuit breaker with optional overload alarm and non-tripping function according to claim 1, characterized in that, The top and bottom of the circuit breaker body (1) are fixed with multiple fixed frames (9). The number and position of the fixed frames (9) match the number and position of the protective plates (8). The fixed frames (9) are U-shaped. Both ends of the fixed frames (9) are fixed with elastic blocks (17) that match the protective plates (8).

4. A molded case circuit breaker with optional overload alarm and non-tripping function according to claim 3, characterized in that, The protective plate (8) has an anti-detachment groove (13) on the side away from the fixed frame (9). An anti-detachment block (14) is slidably connected inside the anti-detachment groove (13). A push plate (15) is fixed to the side wall of the anti-detachment block (14). The push plate (15) matches the elastic locking block (17).

5. A molded case circuit breaker with optional overload alarm and non-tripping function according to claim 4, characterized in that, The end of the anti-detachment block (14) is trapezoidal, and the push plate (15) is T-shaped.

6. A molded case circuit breaker with optional overload alarm and non-tripping function according to claim 4, characterized in that, A handle (16) is fixed to the side of the push plate (15) away from the anti-detachment block (14).

7. A molded case circuit breaker with optional overload alarm and non-tripping function according to claim 1, characterized in that, The rotating block (5) has a groove (6) at one end away from the rotating shaft (4), and a slider (7) is slidably connected inside the groove (6). The slider (7) is fixedly connected to the protective plate (8).

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