Electric leakage circuit breaker with instantaneous function

Abstract

The utility model relates to a circuit breaker, in particular to an instantaneous residual-current circuit breaker, which solves the protection design problem of the circuit breaker. Comprising a shell, a switch, a release, a reset button and an electric leakage coil, a first movable iron core is arranged in the electric leakage coil, a first ejector rod connected with the first movable iron core is arranged in the electric leakage coil, the first ejector rod is in linkage fit with the release through the first movable iron core, and the release is in abutting linear linkage with the reset button. The indicating lever is movably assembled in the shell, the two ends of the indicating lever rotate relative to a connecting point, the reset button is of a strip-shaped structure distributed in a step mode, the reset button is provided with a high step position and a low step position, a traditional product is optimized and improved, a preset target is achieved through light touch linkage of an internal structure, and the safety of the product is improved. Comprising electric leakage protection, short-circuit protection and the like, the structural design is ingenious, the product size is reduced, the structural compactness and integrity are improved, the use safety is further ensured, and the cost is reduced.

Description

Technical Field

[0001] This utility model relates to a circuit breaker, and more particularly to a circuit breaker with instantaneous leakage current. Background Technology

[0002] A residual current circuit breaker (RCCB) is a safety device used to detect leakage current in a circuit and automatically cut off the power supply. It is primarily used to prevent electric shock and electrical fires and is widely used in homes, industries, and commercial establishments. RCCBs operate by monitoring the current balance in the circuit. Under normal circumstances, the current flowing into the circuit is equal to the current flowing out of the circuit. If a leakage current occurs (e.g., electric shock to a person or damage to equipment insulation), some current will return through other paths (such as a person or the ground), causing an imbalance between the inflow and outflow currents. Upon detecting this imbalance, the RCCB quickly cuts off the power supply to prevent further danger. Existing RCCBs with leakage protection, indicator lights, and instantaneous protection functions are relatively large and space-consuming, and there is room for improvement. Utility Model Content

[0003] To address the shortcomings of existing technologies, this utility model provides a circuit breaker with instantaneous leakage current.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a leakage current circuit breaker with instantaneous operation, comprising a housing, a closing mechanism, a trip unit, a reset button, and a leakage current coil. The leakage current coil contains a moving iron core, and a push rod connected to the moving iron core is also provided within the leakage current coil. The push rod engages with the trip unit via the moving iron core, and the trip unit is linearly linked with the reset button. The circuit breaker also includes an indicator lever movably mounted within the housing. The two ends of the indicator lever rotate relative to their connection points. The reset button is a stepped strip structure with a high-step position and a low-step position. The indicator lever has a protruding limiting portion, and the high-step position engages with the limiting portion on the rotation path of the indicator lever, limiting its position. The indicator lever is linked to the closing mechanism.

[0005] It also includes an instantaneous coil for detecting short-circuit high current. The instantaneous coil is equipped with a second moving iron core and a second connected push rod. The housing is also equipped with a rotatably connected pry lever. One end of the pry lever is linked to the first push rod, and the other end of the pry lever is linked to the second push rod through magnetic attraction.

[0006] The lever has a groove at one end near the top rod, and the groove has an arc-shaped structure adapted to the size of the top rod.

[0007] A torsion spring is provided between the closing lever and the indicator lever for linkage. The torsion spring has a U-shaped structure and a bent part in the middle.

[0008] The locking plate is sleeved on the indicator lever and rotates circumferentially. The locking plate has a contact end on the side near the torsion spring.

[0009] The indicator lever is provided with a mounting base for the insertion and mounting of a torsion spring, and the contact end and the mounting base are provided with arc surfaces that contact each other.

[0010] The side of the contact end is also provided with a protruding stop, and the mounting base and the stop are engaged and limited in the rotation path.

[0011] The beneficial effects of this utility model are as follows: The instantaneous leakage circuit breaker provided by this utility model optimizes and improves traditional products. It achieves preset goals, including leakage protection and short circuit protection, through the light-touch linkage of the internal structure. The ingenious structural design reduces the product size, improves the compactness and integrity of the structure, further ensures safety and reduces costs. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the combined structure of this utility model;

[0013] Figure 2 This is an exploded structural diagram of the present invention;

[0014] Figure 3 This is a schematic diagram of the internal front view structure of this utility model;

[0015] Figure 4 This is a top view of the internal structure of this utility model. Detailed Implementation

[0016] like Figures 1-4 As shown, a residual current circuit breaker (RCCB) with instantaneous operation includes a housing 1, a closing mechanism 2, a trip unit, a reset button 4, and a residual current coil 5. The residual current coil 5 contains a moving iron core, and a push rod 6 connected to the moving iron core is also located within the coil 5. The push rod 6 engages with the trip unit via the moving iron core, and the trip unit is linearly linked to the reset button 4. The linkage between the push rod 6 and the trip unit is a mature technology; here, the trip unit's operation is further enhanced by its interaction with the reset button 4. It should be noted that the trip unit only needs to contact the reset button 4 during rotation; the reset button 4 itself has a dedicated linear movement channel within the housing 1. This design fully utilizes the kinetic energy of the trip unit, resulting in optimized structural design and rational utilization.

[0017] It also includes an indicator lever 7 movably mounted within the housing 1. The two ends of the indicator lever 7 rotate relative to the connection point. The reset button 4 is a stepped strip structure with a high-step position 9 and a low-step position 10. The indicator lever 7 has a protruding limiting part 8. The high-step position 9 engages with the limiting part 8 on the rotation path of the indicator lever 7, limiting its movement. The indicator lever 7 and the closing switch 2 are linked and assembled. The reset button 4 directly blocks the rotation of the indicator lever 7 through the high-step position 9. The indicator lever 7 and the closing switch 2 are driven by a bridging connection. This structure is simple, reliable in transmission, and adjusts the rotation direction for output. For leakage protection, when leakage is detected, the tripping mechanism acts quickly, and the moving iron core in the leakage coil 5 moves. This drives the trip unit, which in turn drives the reset button 4. The reset button 4 rebounds, locking the indicator lever 7, thereby preventing the handle from closing the switch 2, thus achieving leakage protection. After eliminating the leakage fault, the reset button 4 is manually operated, and the handle is operated to reset the circuit breaker and restore power supply.

[0018] It also includes an instantaneous coil 11 for detecting large short-circuit currents. The instantaneous coil 11 contains a moving iron core and a connected push rod 12. The housing 1 also contains a rotatably connected lever 13. One end of the lever 13 is linked to the push rod 6, and the other end is magnetically linked to the push rod 12. For instantaneous protection, when a large short-circuit current is detected, the instantaneous coil 11 generates a strong magnetic field, attracting and actuating the closing mechanism 2. The closing mechanism 2 responds quickly, separating the contacts and cutting off the current. The contact system separates, and the circuit is broken. After the short-circuit fault is cleared, the circuit breaker can be manually reset by operating the handle to restore power.

[0019] The pry lever 13 has a groove 14 at one end near the push rod 12. The groove 14 has an arc-shaped structure adapted to the size of the push rod 12. This prevents strong impacts from high currents during short circuits, which could affect the service life of local components. A torsion spring 15 is provided between the closing lever 2 and the indicating lever 7 for linkage. The torsion spring 15 has a U-shaped structure and a bend in the middle. The torsion spring 15 is inserted into the closing lever 2, and the bend is designed to minimize the transmission angle, which helps to further reduce the design space.

[0020] The locking plate 16 is sleeved on the indicating lever 7 and rotates circumferentially. The locking plate 16 has a contact end 17 on the side near the torsion spring 15. The indicating lever 7 is provided with a mounting seat 18 for the torsion spring 15 to be inserted and installed. The contact end 17 and the mounting seat 18 are provided with arc surfaces that contact each other. The contact end 17 provides a more suitable contact linkage angle, and the arc surface increases the contact area. The mounting seat 18 can achieve blocking and limiting in the opposite direction. In order for the locking plate 16 to achieve a more efficient locking effect, a sliding post that slides and limits the locking plate 16 can be provided in the housing 1. Similarly, an arc-shaped sliding groove 19 is also provided on the locking plate 16. The above is only one embodiment and is not the only limitation. The side of the contact end 17 is also provided with a protruding stop 20. The mounting seat 18 and the stop 20 block and limit the rotation path. The stop 20 and the contact end 17 form a near right angle bayonet, which facilitates blocking and limiting further rotation.

[0021] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They 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. Therefore, they should not be construed as limitations on this utility model. At the same time, the basic principles, main features, and advantages of this utility model have been shown and described above, which should be understood by those skilled in the art.

Claims

1. A circuit breaker with instantaneous residual current circuit breaker, comprising a housing, a closing mechanism, a trip unit, a reset button, and a residual current coil, wherein the residual current coil contains a moving iron core, characterized in that, The leakage current coil is provided with a push rod connected to a moving iron core. The push rod is linked with the trip unit through the moving iron core. The trip unit is also linearly linked with the reset button. It also includes an indicator lever movably assembled in the housing. The two ends of the indicator lever rotate relative to the connection point. The reset button is a stepped strip structure with a high-step position and a low-step position. The indicator lever has a protruding limiting part. The high-step position is blocked and limited by the limiting part on the rotation path of the indicator lever. The indicator lever is linked with the closing device.

2. A circuit breaker with instantaneous residual current as described in claim 1, characterized in that, It also includes an instantaneous coil for detecting short-circuit high current. The instantaneous coil is equipped with a second moving iron core and a second connected push rod. The housing is also equipped with a rotatably connected pry lever. One end of the pry lever is linked to the first push rod, and the other end of the pry lever is linked to the second push rod through magnetic attraction.

3. A circuit breaker with instantaneous residual current as described in claim 2, characterized in that, The lever has a groove at one end near the top rod, and the groove has an arc-shaped structure adapted to the size of the top rod.

4. A circuit breaker with instantaneous residual current as described in claim 1, characterized in that, A torsion spring is provided between the closing lever and the indicator lever for linkage. The torsion spring has a U-shaped structure and a bent part in the middle.

5. A circuit breaker with instantaneous residual current as described in claim 4, characterized in that, It also includes a locking plate that is sleeved on the indicator lever and rotates circumferentially, the locking plate having a contact end near the torsion spring.

6. A circuit breaker with instantaneous residual current as described in claim 5, characterized in that, The indicator lever is provided with a mounting base for the insertion and mounting of a torsion spring, and the contact end and the mounting base are provided with arc surfaces that contact each other.

7. A circuit breaker with instantaneous residual current as described in claim 6, characterized in that, The side of the contact end is also provided with a protruding stop, and the mounting base and the stop are engaged and limited in the rotation path.

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