Electronic leakage protection mechanism for circuit breaker

Abstract

The utility model discloses an electronic leakage protection mechanism for a circuit breaker, which comprises an actuating mechanism arranged in a circuit breaker shell, a handle is connected outside the actuating mechanism, the actuating mechanism comprises a contact seat (1) and a lock catch (2) which are connected with each other, a first tripping part (3) is formed on one side of the lock catch (2), and a second tripping part (4) is formed on the other side of the lock catch (2). A first tripping part (3) is formed on one side of the lock catch (2), a first tripper (4) connected with a circuit breaker shell is arranged outside the first tripping part (3), a second tripping part (5) is formed on the other side of the lock catch (2), a tripping rod (6) is connected outside the second tripping part (5), and a second tripper (7) connected with the circuit breaker shell is arranged outside the tripping rod (6). According to the utility model, the occupied space of the first release can be reduced, thereby facilitating wiring of a circuit board.

Description

Technical Field

[0001] The utility model relates to a leakage protection mechanism for a circuit breaker, in particular to an electronic leakage protection mechanism for a circuit breaker. Background Art

[0002] The leakage protection mechanism and short-circuit protection mechanism traditionally used in circuit breakers are split structures and are arranged side by side in the circuit breaker housing on one side of the actuator, so that when leakage or short circuit problems occur in the external circuit, the corresponding protection mechanism can be triggered to act and the actuator can be pushed, so that the actuator can complete the opening action after being pushed. However, this method will relatively occupy the space of the arc extinguishing mechanism below, thereby increasing the height of the circuit breaker and decreasing the space utilization rate. In response to the above problems, the electromagnetic mechanism of the current circuit breaker is shown in patent 202010971910.X. By winding the electromagnetic coil for short-circuit protection around the outside of the iron core coil for leakage protection, the two sets of releases can be integrated on the same electromagnetic mechanism, and when leakage or short circuit problems occur in the external circuit, the inner push rods are driven out to realize the opening action of the actuator, thereby effectively reducing the space occupied by the electromagnetic mechanism in the height direction of the circuit breaker.

[0003] However, the electromagnetic mechanism formed by the two sets of electromagnetic coils nested inside and outside will occupy the thickness space of the circuit breaker accordingly, resulting in the circuit board inside the circuit breaker being blocked by the external coil during layout and unable to extend to the electromagnetic mechanism, actuator and other positions, which has certain layout restrictions. At the same time, since the current power-taking mechanism, test button and other components need to be distributed in the surrounding areas of the electromagnetic mechanism and the actuator, and are interconnected with the circuit board, the above components need to be connected by a soft wire during installation, that is, one end of the soft wire is connected to the circuit board, and the other end of the soft wire extends along the peripheral gap of the circuit breaker toward the electromagnetic mechanism and completes the wiring, which causes the wires in the circuit breaker to be densely distributed and the layout to be messy, greatly increasing the difficulty of assembling the circuit breaker.

[0004] Therefore, the electromagnetic mechanism in the existing circuit breaker will hinder the circuit board, making it impossible for the circuit board to extend inward and complete the wiring. Utility Model Content

[0005] The purpose of the utility model is to provide an electronic leakage protection mechanism for a circuit breaker, which can reduce the occupied space of a first release, thereby facilitating the wiring of a circuit board.

[0006] The technical solution of the utility model is as follows: an electronic leakage protection mechanism for a circuit breaker comprises an actuator installed in a circuit breaker housing, the outside of the actuator is connected with a handle, the actuator comprises a contact seat and a lock that are connected to each other, one side of the lock forms a first tripping part, the outside of the first tripping part is provided with a first release connected to the circuit breaker housing, the other side of the lock forms a second tripping part, the outside of the second tripping part is connected with a tripping rod, and the outside of the tripping rod is provided with a second tripping device connected to the circuit breaker housing.

[0007] In the aforementioned electronic leakage protection mechanism for a circuit breaker, when a leakage problem occurs in the circuit breaker, the second release pushes the tripping rod after being triggered, so that the tripping rod triggers a locking action through the second tripping part after being pushed, thereby realizing the opening of the actuator;

[0008] When a short circuit occurs in the circuit breaker, the first releaser pushes the first release part after being triggered, so that the lock performs an opening action after being pushed, thereby realizing the opening of the actuator.

[0009] In the aforementioned electronic leakage protection mechanism for a circuit breaker, the second tripping portion includes a sliding groove located on one side of the lock, and one end of the sliding groove forms a triggering portion that cooperates with the tripping rod.

[0010] In the aforementioned electronic leakage protection mechanism for a circuit breaker, the trip rod is rotatably connected to the circuit breaker housing, a reset spring is connected between the trip rod and the circuit breaker housing, a trigger rod is provided on one side of the trip rod, the end of the trigger rod extends into the slide groove, and a push plate cooperating with the second releaser is provided on the other side of the trip rod.

[0011] The aforementioned electronic leakage protection mechanism for a circuit breaker also includes a circuit breaker housing, in which a circuit board is connected, one end of the circuit board extends to the outside of the first release and is arranged side by side inside and outside between the first release along the thickness direction of the circuit breaker.

[0012] In the aforementioned electronic leakage protection mechanism for a circuit breaker, the circuit breaker housing includes two groups of split inner and outer housings, a first installation cavity is formed between the inner and outer housings, and a second installation cavity is formed between the two groups of inner housings. The contact seat, the lock and the first release are all located in the first installation cavity, and the release rod, the second release and the circuit board are located in the second installation cavity.

[0013] Compared with the prior art, the utility model has the following characteristics:

[0014] (1) The utility model provides a first release and a second release, and the structure of the lock and the release rod is coordinated, so that the first release can trigger the lock in a conventional manner to realize the gate opening action, and the second release can push the release rod after being triggered, so that the release rod triggers the lock through the second release part to realize the gate opening action; under the above coordination, the first release and the second release can be separated from each other and respectively arranged on both sides of the actuator, that is, on the one hand, the driving coil wrapped outside the first release is removed, the occupied space of the first release is reduced, and the circuit board can be extended to the outside of the first release; on the other hand, the second release can be installed below the actuator, thereby improving the utilization rate of the internal space of the circuit breaker and reducing the occupation of the second release in the height direction of the circuit breaker;

[0015] (2) By defining the connection structure between the trip rod and the lock buckle, the lock buckle will not be hindered by the trip rod when it is pushed by the first trip device to open the gate; and when the trip rod pushes the lock buckle after being triggered, the lock buckle can be stably triggered, thereby ensuring the triggering stability of the lock buckle's gate opening action;

[0016] Therefore, the utility model can reduce the occupied space of the first release, thereby facilitating the wiring of the circuit board. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is an exploded view of the utility model;

[0018] Figure 2 It is a schematic diagram of the connection between the lock and the trip rod;

[0019] Figure 3 is a schematic diagram of the structure of the circuit breaker in the second installation cavity;

[0020] Figure 4 It is a schematic diagram of the structure of the inner housing and the circuit board after being connected;

[0021] Figure 5 It is a schematic diagram of the structure of the circuit breaker in the first installation cavity.

[0022] The markings in the accompanying drawings are: 1-contact seat, 2-lock, 3-first release part, 4-first release, 5-second release part, 6-trip rod, 7-second release, 8-slide slot, 9-trigger part, 10-trigger rod, 11-push plate, 12-circuit board, 13-inner shell, 14-outer shell. DETAILED DESCRIPTION

[0023] The present invention is further described below in conjunction with the accompanying drawings and embodiments, but they are not intended to limit the present invention.

[0024] Embodiment. An electronic leakage protection mechanism for a circuit breaker, comprising: Figure 1 As shown, it includes an actuator installed in the circuit breaker housing, and a handle is connected to the outside of the actuator. The actuator includes a contact seat 1 and a lock 2 that are connected to each other. The contact seat 1 and the lock 2 are connected to each other in a conventional manner and limit the handle connecting rod. When the lock 2 rotates to open the gate, the lock 2 releases the limit on the handle connecting rod and enables the handle to open the gate under the action of the handle spring;

[0025] A first tripping portion 3 is formed on one side of the lock 2, and a first tripping device 4 connected to the circuit breaker housing is provided outside the first tripping portion 3. A second tripping portion 5 is formed on the other side of the lock 2, and a tripping rod 6 is connected outside the second tripping portion 5, and a second tripping device 7 connected to the circuit breaker housing is provided outside the tripping rod 6.

[0026] When the circuit breaker has a leakage problem, the second release 7 pushes the trip rod 6 after being triggered, so that the trip rod 6 triggers the lock 2 through the second trip part 5 after being pushed, and the actuator is opened;

[0027] When a short circuit occurs in the circuit breaker, the first release 4 pushes the first tripping part 3 after being triggered, so that the lock 2 performs an opening action after being pushed, thereby realizing the opening of the actuator.

[0028] The second release portion 5 includes a slide groove 8 located at one side of the lock buckle 2 , and one end of the slide groove 8 forms a trigger portion 9 that cooperates with the release rod 6 .

[0029] The trip rod 6 is rotatably connected to the circuit breaker housing, a reset spring is connected between the trip rod 6 and the circuit breaker housing, a trigger rod 10 is provided on one side of the trip rod 6, the end of the trigger rod 10 extends into the slide groove 8, and a push plate 11 cooperating with the second release 7 is provided on the other side of the trip rod 6; the trip rod 6 rotates after being pushed by the second release 7, and the trigger rod 10 squeezes the trigger part 9 during the rotation process, so that the trigger part 9 triggers the lock 2 to open the gate after being squeezed.

[0030] It also includes a circuit breaker housing, in which a circuit board 12 is connected. One end of the circuit board 12 extends to the outside of the first release 4 and is arranged side by side with the first release 4 along the thickness direction of the circuit breaker.

[0031] The circuit breaker housing comprises two groups of split inner housings 13 and outer housings 14, a first installation cavity is formed between the inner housing 13 and the outer housing 14, and a second installation cavity is formed between the two groups of inner housings 13, the contact seat 1, the lock 2 and the first release 4 are all located in the first installation cavity; the release rod 6, the second release 7 and the circuit board 12 are located in the second installation cavity, and the inner housing 13 is provided with an arc groove for the trigger rod 10 to pass through; the inner housing 13 can be provided with openings in some areas as needed, so that some components can extend into the first installation cavity through the openings, that is, the utilization rate of the internal space of the circuit breaker is improved;

[0032] The circuit board 12 may be provided with a plurality of openings for connection. Components such as the power-taking mechanism and the testing mechanism that need to be connected to the circuit board may be directly mounted on the openings of the circuit board 12 through the inner shell 13 and connected to each other by soldering, thereby eliminating the need for connecting soft wires between the components and the circuit board 12. The circuit board 12 may also be provided with a split structure as required, and may be provided with an inner and outer staggered arrangement according to the installation height of the components in the second installation cavity, thereby maximizing the utilization of the internal space of the circuit breaker.

[0033] The working principle of the utility model is as follows: when a short circuit occurs in the external circuit, the first release 4 pushes the first release part 3 after being triggered, so that the lock buckle 2 rotates to open the gate after being pushed. When the lock buckle 2 rotates to open the gate, the slide groove 8 rotates relative to the trigger rod 10, and a space is reserved for avoiding the trigger rod 10, so that the trigger rod 10 will not contact the lock buckle 2 to form an obstacle during the rotation and opening process of the lock buckle 2, thereby ensuring the stability of the action of the lock buckle 2.

[0034] When leakage occurs in the external circuit, the second release 7 detects it and drives the ejector rod to push out, thereby pushing the ejector plate 11. After being pushed, the ejector plate 11 drives the trip rod 6 to rotate to overcome the elastic force of the reset spring, and the trigger rod 10 squeezes the trigger part 9 during the rotation process, so that the lock buckle 2 rotates to open the gate after being squeezed.

Claims

1. An electronic leakage protection mechanism for a circuit breaker, comprising an actuator installed in a circuit breaker housing, the actuator being externally connected to a handle, characterized in that: The actuator comprises a contact seat (1) and a lock (2) connected to each other, one side of the lock (2) forms a first release part (3), the outside of the first release part (3) is provided with a first release (4) connected to a circuit breaker housing, the other side of the lock (2) forms a second release part (5), the outside of the second release part (5) is connected to a release rod (6), and the outside of the release rod (6) is provided with a second release (7) connected to the circuit breaker housing.

2. The electronic leakage protection mechanism for circuit breaker according to claim 1, characterized in that: When the circuit breaker has a leakage problem, the second release (7) pushes the tripping rod (6) after being triggered, so that the tripping rod (6) triggers the lock (2) to act through the second tripping part (5), thereby realizing the opening of the actuator; When a short circuit occurs in the circuit breaker, the first release (4) pushes the first release part (3) after being triggered, so that the lock (2) performs an opening action after being pushed, thereby realizing the opening of the actuator.

3. The electronic leakage protection mechanism for circuit breaker according to claim 1, characterized in that: The second release portion (5) comprises a slide groove (8) located on one side of the lock buckle (2), and one end of the slide groove (8) forms a trigger portion (9) that cooperates with the release rod (6).

4. The electronic leakage protection mechanism for circuit breaker according to claim 3, characterized in that: The tripping rod (6) is rotatably connected to the circuit breaker housing, a reset spring is connected between the tripping rod (6) and the circuit breaker housing, a trigger rod (10) is provided on one side of the tripping rod (6), the end of the trigger rod (10) extends into the slide groove (8), and a push plate (11) cooperating with the second tripper (7) is provided on the other side of the tripping rod (6).

5. The electronic leakage protection mechanism for circuit breaker according to claim 1, characterized in that: It also comprises a circuit breaker housing, in which a circuit board (12) is connected, one end of the circuit board (12) extends to the outside of the first release (4) and is arranged side by side inside and outside the first release (4) along the thickness direction of the circuit breaker.

6. The electronic leakage protection mechanism for circuit breaker according to claim 5, characterized in that: The circuit breaker housing comprises two groups of split inner housings (13) and outer housings (14); a first installation cavity is formed between the inner housing (13) and the outer housing (14); a second installation cavity is formed between the two groups of inner housings (13); the contact seat (1), the lock (2) and the first release (4) are all located in the first installation cavity; and the release rod (6), the second release (7) and the circuit board (12) are located in the second installation cavity.

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