Test mechanism and residual-current circuit breaker

Abstract

The utility model provides a test mechanism and electric leakage circuit breaker relates to circuit breaker technical field, test mechanism includes electronic component board, with electronic component board connected static contact piece, with electronic component board connected button spring, movable contact piece, the static contact piece is equipped with contact and spring contact area, the movable contact piece is connected with circuit breaker wiring structure, the contact is equipped with the spring contact area, the circuit breaker wiring structure is equipped with the spring contact area, and the circuit breaker wiring structure is equipped with the spring contact area. When a handle of the circuit breaker is operated, the movable contact piece can be connected with the contact, and the button spring can be connected with the spring contact area after acting to form a test circuit. When a circuit is subjected to action protection due to electric leakage faults, an electric leakage mechanism can act quickly to promote a circuit breaker handle to be disconnected quickly, a moving contact and a static contact to be separated, a moving contact piece to be restored immediately and a power supply live wire end to be disconnected, so that power supply of an electronic component board is cut off, and burnout of a product release coil caused by reverse connection of incoming and outgoing lines is avoided, namely, the incoming and outgoing lines can be connected randomly; and the requirement on a wiring mode is low.

Description

Technical Field

[0001] The utility model relates to the technical field of circuit breakers, in particular to a testing mechanism and a leakage circuit breaker. Background Art

[0002] In the test module of a traditional circuit breaker, leads need to be set between the electronic component board and the test button and the conductive pin respectively. Both ends of each lead need to be welded, which requires four welding points, resulting in low assembly efficiency and high cost of the circuit breaker. The large number of leads also makes the internal structure of the circuit breaker complicated. In addition, traditional circuit breakers have requirements for the connection positions of the incoming and outgoing lines. When the connection is reversed, it is easy to cause the product tripping coil to burn out. In view of the above defects, the present application is proposed. Utility Model Content

[0003] The utility model aims to provide a test mechanism and a leakage circuit breaker, which solves the problem that the circuit breaker test module at the current stage has high requirements on the wiring mode of the incoming and outgoing lines.

[0004] In order to solve the above problems, the utility model provides a test mechanism, including an electronic component board, a static contact piece connected to the electronic component board, a button spring connected to the electronic component board, and a moving contact piece, wherein the static contact piece is provided with a contact point and a spring contact area, and the moving contact piece is connected to the circuit breaker wiring structure, and the moving contact piece can be connected to the contact point when the circuit breaker handle is operated, and the button spring can be connected to the spring contact area after actuation to form a test path.

[0005] According to an embodiment of the utility model, the test mechanism further comprises a test button, and the test button is provided with a groove, and the button spring enters the groove when the test button is pressed.

[0006] According to an embodiment of the present invention, the movable contact piece is an elastic piece, and when the circuit breaker handle is switched from a closed state to an open state, the movable contact piece automatically recovers and separates from the contact point.

[0007] According to an embodiment of the utility model, the button spring is plug-connected to the electronic component board.

[0008] According to an embodiment of the present invention, the stationary contact piece is plug-connected to the electronic component board.

[0009] According to an embodiment of the utility model, a square plugging hole which penetrates through and has an open end is provided on the electronic component board, and the static contact piece is installed in the square plugging hole.

[0010] According to an embodiment of the present invention, the contact points and the spring contact areas are arranged sequentially in the horizontal direction.

[0011] According to an embodiment of the present invention, the length of the spring contact area is greater than the diameter of the button spring.

[0012] According to an embodiment of the present utility model, the plug-in end of the stationary contact piece has a limiting structure.

[0013] A leakage circuit breaker comprises the above-mentioned testing mechanism.

[0014] The beneficial effect of the utility model is that the button spring and the static contact piece are all plug-in connected to the electronic component board. With this structural layout design, there is no need for lead connection, which reduces soldering points, saves costs, improves product assembly efficiency, and makes the product more concise inside. When the circuit is protected by a leakage fault, the leakage mechanism will act quickly, prompting the circuit breaker handle to disconnect quickly, the moving and static contacts to separate, the moving contact piece to recover immediately, the live wire end of the power supply is disconnected, and the power supply of the electronic component board is also disconnected, avoiding the burning of the product release coil due to the wrong connection of the incoming and outgoing lines, that is, the incoming and outgoing lines can be connected at will, and the requirements for the wiring method are low. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0016] Figure 1 It is a schematic diagram of the overall structure of the leakage circuit breaker;

[0017] Figure 2 It is a schematic diagram of the test mechanism structure;

[0018] Figure 3 It is a schematic diagram of the test mechanism structure;

[0019] Figure 4 It is a schematic diagram of the static contact structure. DETAILED DESCRIPTION

[0020] The following description is only used to disclose the utility model so that those skilled in the art can implement the utility model. The embodiments described below are only for example, and those skilled in the art can think of other obvious variations. The basic principles of the utility model defined in the following description can be applied to other embodiments, variations, improvements, equivalents, and other solutions that do not deviate from the spirit and scope of the utility model.

[0021] [Example 1]

[0022] A testing organization, such as Figure 1-Figure 31. It comprises an electronic component board 1, a stationary contact piece 6 connected to the electronic component board 1, a button spring 2 connected to the electronic component board 1, and a moving contact piece 5. The stationary contact piece 6 is provided with a contact point 61 and a spring contact area 62. The moving contact piece 5 is connected to the circuit breaker wiring structure. When the circuit breaker handle 4 is operated, the circuit breaker handle 4 is provided with a structure for pushing the moving contact piece 5, so that the moving contact piece 5 can be connected to the contact point 61. After the button spring 2 is actuated, it can be connected to the spring contact area 62 to form a test path. After the moving contact piece 5 is disconnected from the contact point 61, the power supply of the electronic component board 1 is disconnected.

[0023] In order to avoid interference, the contact point 61 and the spring contact area 62 are arranged in sequence in the horizontal direction. Further, the contact point 61 and the spring contact area 62 can be arranged at different heights.

[0024] The test mechanism further comprises a test button 3 , on which a groove 31 is arranged. When the test button 3 is pressed, the button spring 2 enters the groove 31 , which plays a role in limiting and stabilizing the button spring 2 .

[0025] The movable contact piece 5 is made of an elastic piece, preferably a stainless steel spring piece with a thickness of 0.25-0.3 mm. When the circuit breaker handle 4 is switched from a closed state to an open state, the movable contact piece 5 automatically recovers and disengages from the contact point 61 .

[0026] The button spring 2 and the static contact piece 6 are plug-in connected to the electronic component board 1. With this structural layout design, no lead connection is required, the number of solder joints is reduced, the risk of desoldering is reduced, the product assembly efficiency is improved, the cost saving effect is achieved, and the product interior is more concise. Preferably, as Figure 4 The plug-in portion of the static contact piece 6 adopts a sheet-like structure, which can make contact with the electronic component board 1. The electronic component board 1 is provided with a square plug-in hole 11 which penetrates through and is open at one end. The static contact piece 6 can be conveniently installed in the square plug-in hole 11 from the top opening. In other embodiments, the plug-in end of the static contact piece 6 can be provided with a stepped limiting structure or a protrusion, which is used to play a limiting role when the static contact piece 6 is installed on the electronic component board 1, and limit the depth of the static contact piece 6 inserted into the square plug-in hole 11. The limiting structure can also be provided on the electronic component board 1.

[0027] In order to ensure that the button spring 2 can stably contact the spring contact area 62, the length of the spring contact area 62 is greater than the diameter of the button spring 2, and can be more than 3 times the diameter of the button spring 2, thereby reducing the requirements for product assembly accuracy.

[0028] During the use of the circuit breaker, when the circuit breaker handle 4 is closed, the moving and static contacts in the circuit breaker are connected, and at the same time, the structure on the circuit breaker handle 4 will push the moving contact piece 5, so that the moving contact piece 5 is connected with the contact 61 on the static contact piece 6, and the live wire end of the power supply is connected; when the line is protected due to a leakage fault, the leakage mechanism will act quickly, prompting the circuit breaker handle 4 to be quickly disconnected, the moving and static contacts to separate, the moving contact piece 5 to be immediately restored, the live wire end of the power supply is disconnected, and the power supply of the electronic component board 1 is disconnected. The biggest advantage of this design is: it avoids the burning of the product release coil caused by the wrong connection of the incoming and outgoing lines, that is, the incoming and outgoing lines can be connected at will, regardless of whether the live wire is top-in and bottom-out or bottom-in and top-out, after the circuit breaker handle 4 is actuated to separate the moving and static contacts, the moving contact piece 5 and the static contact piece 6 can be separated, and the power supply of the electronic circuit board is disconnected, thereby avoiding the problem of coil burning. Therefore, there is no clear regulation on whether the product is connected in the upper or lower wiring mode.

[0029] Test process: When the product is in normal working state, press the test button 4, the test button 4 pushes the button spring 2 to contact the spring contact area 62 of the static contact piece 6, and then the test device circuit is turned on. At this time, the magnetic ring detects the current imbalance and outputs an induction signal to the electronic component board. The electronic component board can provide a working voltage to the release coil assembly through internal signal operation amplification processing. The electromagnetic force prompts the moving iron core to work and push the operating mechanism to lock, the contacts are disconnected, and the power is cut off.

[0030] A leakage circuit breaker comprises the above-mentioned testing mechanism.

[0031] Those skilled in the art should understand that the embodiments of the present invention described above and shown in the accompanying drawings are only examples and do not limit the present invention. The purpose of the present invention has been fully and effectively achieved. The functions and structural principles of the present invention have been demonstrated and explained in the embodiments. Without departing from the principles, the embodiments of the present invention may be deformed and modified in any way.

Claims

1. A testing mechanism, characterized in that: The invention comprises an electronic component board (1), a stationary contact piece (6) connected to the electronic component board (1), a button spring (2) connected to the electronic component board (1), and a moving contact piece (5); the stationary contact piece (6) is provided with a contact point (61) and a spring contact area (62); the moving contact piece (5) is connected to a circuit breaker wiring structure; when a circuit breaker handle is operated, the moving contact piece (5) can be connected to the contact point (61); and the button spring (2) can be connected to the spring contact area (62) after being actuated, thereby forming a test path.

2. A test mechanism according to claim 1, characterized in that: The test mechanism also includes a test button (3), on which a groove (31) is provided. When the test button (3) is pressed, the button spring (2) enters the groove (31).

3. A test device according to claim 1 or 2, characterized in that: The movable contact piece (5) is an elastic piece, and when the circuit breaker handle is switched from a closed state to an open state, the movable contact piece (5) automatically recovers and is separated from the contact point (61).

4. A test mechanism according to claim 3, characterized in that: The button spring (2) is plug-connected to the electronic component board (1).

5. A test mechanism according to claim 4, characterized in that: The stationary contact piece (6) is plug-connected to the electronic component board (1).

6. A test mechanism according to claim 5, characterized in that: The electronic component board (1) is provided with a square plug hole (11) which penetrates through and is open at one end, and the static contact piece (6) is installed in the square plug hole (11).

7. A test device according to any one of claims 4 to 6, characterized in that: The contact point (61) and the spring contact area (62) are arranged in sequence in the horizontal direction.

8. A test device according to any one of claims 4 to 6, characterized in that: The length of the spring contact area (62) is greater than the diameter of the button spring (2).

9. A test device according to claim 5 or 6, characterized in that: The plug-in end of the stationary contact piece (6) has a limiting structure.

10. A leakage circuit breaker, characterized in that: A test device comprising any one of claims 1 to 9.

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