Circuit breaker electronic board integrated structure

Abstract

The technical scheme belongs to the technical field of circuit breakers, and particularly relates to a circuit breaker electronic board integrated structure which comprises a shell with a mounting cavity and a circuit board mounted in the mounting cavity. The release is fixed on the circuit board and is used for attracting an armature to be closed after being electrified; the test assembly comprises a test button which slides in the mounting cavity; the test resistor is mounted on the circuit board; the shell is provided with a fixing column used for sleeving the button torsion spring, an upper contact pin of the button torsion spring acts on the test button to apply pre-compression, and a lower contact pin at the other end of the button torsion spring abuts against the test resistor; when the test button is pressed, the test button drives the button torsion spring to enable the contact pin on the button torsion spring to be in contact with the test spring, the button torsion spring, the test spring and the test resistor are matched and connected to form a test loop, complex wiring of a traditional circuit breaker is simplified, and abrasion and fault risks caused by disordered lines are reduced. The use stability is improved.

Description

Technical Field

[0001] This technical solution relates to the field of circuit breaker technology, and specifically refers to an integrated structure for a circuit breaker electronic board. Background Technology

[0002] A circuit breaker is a circuit protection device that uses an electromagnetic system to engage when a large current is applied during a short circuit, causing the armature to move under force. During this movement, the armature pushes the control mechanism to disengage and disconnect the energized circuit, automatically providing protection against undervoltage, overload, and short circuit.

[0003] For example, Chinese patent CN203787366U discloses a residual current circuit breaker, which includes an insulating shell, mechanical components, an electromagnetic trip unit, a circuit board, and a testing device. The testing device includes a test button, a torsion spring, a conductive sheet, and a test resistor. The test button is disposed on the insulating shell, the conductive sheet is disposed inside the insulating shell, the test resistor is disposed on the circuit board, the conductive sheet is connected to one end of the test resistor, and the circuit board is connected to the electromagnetic trip unit.

[0004] Currently, in the aforementioned small residual current circuit breaker products, after the circuit boards, trip units, and testing devices are placed in designated locations and connected to each other, the wiring layout of each connection line is prone to be chaotic, leading to problems such as broken wires and poor connections, increasing the failure rate, and affecting the reliability of the product, which needs to be improved. Summary of the Invention

[0005] This technical solution aims to address the problem of messy wiring and easy damage to circuit boards, trip units, and test devices within circuit breakers, which leads to a high failure rate. It provides an integrated electronic board structure for circuit breakers.

[0006] The purpose of this technical solution is achieved as follows:

[0007] An integrated structure for a circuit breaker electronic board includes a housing, the housing having a mounting cavity, the mounting cavity having a button opening corresponding to the side wall of the housing, and a circuit board installed in the mounting cavity.

[0008] A trip unit, fixed to the circuit board, is used to attract and close the armature upon energization; and

[0009] Test components, the test components include:

[0010] A test button is located at the button opening and is slidably disposed relative to the housing;

[0011] A test resistor, which is mounted on the circuit board;

[0012] A button torsion spring, wherein the housing is provided with a fixing post for the button torsion spring to be sleeved, the upper contact of the button torsion spring applies a preload to the test button, and the lower contact at the other end abuts against the test resistor;

[0013] A test spring is connected at one end to the circuit board. When the test button is pressed, the test button drives the button torsion spring so that its upper contact pin contacts the test spring. The button torsion spring, the test spring, and the test resistor work together to form a test circuit.

[0014] Through the above technical solution, when a circuit breaker electronic board integrated structure is in normal use, the test resistor, trip unit, and test spring are directly connected to the circuit board, and the circuit board is installed in the mounting cavity of the housing. The button torsion spring is sleeved on the fixing post of the housing, and its upper contact applies pre-pressure to the test button to ensure that the button protrudes through the button opening from the outer wall of the housing. The lower contact of the button torsion spring is always connected to the test resistor. By pressing the test button, the test button presses down the upper contact of the button torsion spring until it abuts against the test spring to form a test circuit, which can energize the trip unit to attract the armature and realize the closing operation. This reduces the complex wiring and connection points in traditional circuit breakers, reduces physical wear and failure risk caused by messy wiring, and improves the accuracy and stability of use.

[0015] Preferably, the trip unit includes an outer frame and a stationary iron core. The outer frame is provided with a plug pin, and the circuit board is provided with a corresponding connection hole. The plug pin passes through the connection hole and is then fixed.

[0016] Through the above technical solution, the trip unit consists of an outer frame and a stationary iron core. The plug pins are welded through the corresponding connection holes to achieve plug-in fixation and electrical connection on the circuit board, which simplifies the assembly process, ensures close cooperation, and enhances the stability of the electrical connection between the trip unit and the circuit board.

[0017] Preferably, the connector pin includes a positioning pin and a fixing pin. The positioning pin has an inclined annular surface that tapers away from the outer frame.

[0018] With the above technical solution, the fixed foot passes through the position of the connecting hole. Based on the inclined annular surface of the positioning foot, a tapered guide surface is formed, which makes the guide positioning foot fit into the connecting hole more smoothly, reduces assembly resistance and friction, and improves the efficiency and accuracy of plug-in assembly.

[0019] Preferably, the circuit board also has a through hole one for the fixing post to pass through; the circuit board also has a through hole two for the connecting end of the test spring to pass through and connect.

[0020] The circuit board has a through hole three, which is used for the connection terminal of the test resistor to pass through and connect.

[0021] Through the above technical solution, the first through hole on the circuit board allows the fixing post to pass through. The fixing post serves as the support post for the button torsion spring and restricts the swing of the circuit board to a certain extent. The connecting end of the test spring passes through the second through hole and connects to the corresponding contact on the circuit board. The connecting end of the test resistor passes through the third through hole and connects to the corresponding contact on the circuit board, thus satisfying the electrical connection of the test circuit, realizing stable connection and reliable cooperation between various components, and improving the performance and reliability of the entire circuit board.

[0022] Preferably, the housing includes a housing base, an outer cover disposed on the housing base, and a housing cover disposed on the outer cover. The housing base is provided with the fixing post, and the housing base is provided with an orientation block, and the orientation block is provided with an orientation groove.

[0023] The test button has an anti-detachment part that protrudes from the opposite side walls of the test button along the sliding direction. The anti-detachment part is embedded in the directional groove, and the groove direction of the directional groove is parallel to the sliding direction of the test button. The circuit board has a clearance groove at the position corresponding to the directional block.

[0024] With the above technical solution, the orientation block protrudes relative to the housing and is placed exactly in the appropriate relief groove on the circuit board, optimizing the layout. The inner wall of the relief groove can abut against the orientation block, further improving the stability of the circuit board.

[0025] The anti-detachment part on one side of the test button is embedded in the appropriate directional groove. The upper end of the test button protrudes out of the housing after passing through the button opening. Then, the outer cover is installed. The anti-detachment part on the other opposite side abuts against the lower end face of the outer cover along the movement direction of the test button to restrict the test button from detaching from the button opening and prevent the test button from being lost. Based on the matching of the groove direction of the directional groove with the sliding direction of the test button, the relative sidewalls in the directional groove along the sliding direction of the test button form a swing limit for the test button, improving the movement guidance and accuracy of the test button during the pressing and resetting process.

[0026] Preferably, the circuit board is connected with power lines and current transformer lines, and a wiring groove is formed between the housing and the outer cover for the power lines and current transformer lines to pass through.

[0027] Through the above technical solution, the wiring trough provides sufficient channel space for power lines and transformer lines, avoiding wear and interference caused by pressing on the lines during the installation of the outer cover. At the same time, the space of the wiring trough ensures that the lines are more stable after passing through, preventing the lines from becoming loose or damaged due to vibration or external force.

[0028] Preferably, the outer cover is provided with structural ribs, which are distributed on the side of the trip unit away from the circuit board;

[0029] The structural reinforcement is provided with a receiving part, which has a receiving hole for the outer end of the fixed column to pass through.

[0030] Through the above technical solution, the structural ribs enhance the structural strength of the outer cover, and the distribution of the structural ribs forms a blocking and limiting effect on the trip unit, preventing it from accidentally detaching from the circuit board due to external factors such as vibration and impact, thereby improving the installation stability of the trip unit; the receiving hole of the receiving part is aligned with the end of the fixing post for it to pass through, thereby limiting the button torsion spring sleeved on the fixing post from detaching from the fixing post, thereby improving the installation stability.

[0031] The key and beneficial technical effects of this technical solution compared to existing technologies are:

[0032] 1. This technical solution integrates the test resistor, trip unit, and test spring directly onto the circuit board, which is then installed inside the housing. Simultaneously, a torsion spring is used to apply pre-pressure to the test button, causing it to protrude outside the housing. When the test button is pressed, a test circuit is formed, energizing and closing the trip unit. This simplifies the complex wiring of traditional circuit breakers, reduces physical wear and failure risks caused by messy wiring, and improves the accuracy and stability of use. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the overall structure of this embodiment;

[0034] Figure 2 This is a schematic diagram of the outer cover layer structure in this embodiment;

[0035] Figure 3 This is a schematic diagram of the shell layer structure in this embodiment;

[0036] Figure 4 This is a partial structural diagram of the orientation block in the embodiment;

[0037] Figure 5 This is a schematic diagram of the assembly structure of the circuit board and test components in the embodiment;

[0038] Figure 6 This embodiment Figure 5 Partial structural diagram;

[0039] Figure 7 This embodiment Figure 6 Another perspective illustration;

[0040] Figure 8 This is a schematic diagram of the overall structure of the circuit board in the embodiment;

[0041] Figure 9 This is a schematic diagram of the overall structure of the trip unit in the embodiment.

[0042] Reference numerals: 1. Housing; 11. Housing base; 12. Outer cover; 13. Housing cover; 2. Mounting cavity; 3. Circuit board; 4. Trip unit; 41. Outer frame; 42. Static iron core; 5. Test assembly; 51. Test button; 52. Test resistor; 53. Button torsion spring; 54. Test spring; 6. Fixing post; 7. Anti-disengagement part; 8. Plug-in pin; 81. Positioning pin; 82. Fixing pin; 9. Connecting hole; 10. Inclined toroidal surface; 14. Through hole one; 15. Through hole two; 16. Through hole three; 17. Orienting block; 18. Orienting groove; 19. Leaving groove; 20. Power cord; 21. Current transformer wire; 22. Wiring groove; 23. Structural rib; 24. Receiving part; 25. Receiving hole; 26. Button port. Detailed Implementation

[0043] The specific implementation of this technical solution will be further described in detail below with reference to the accompanying drawings.

[0044] Example:

[0045] See Figure 1 An integrated structure for a circuit breaker electronic board includes a housing 1. The housing 1 includes a housing base 11, an outer cover 12, and a housing cover 13. One side of the housing base 11 is spliced ​​onto the circuit breaker. The outer cover 12 is installed on the side of the housing base 11 away from the circuit breaker. The housing cover 13 is installed on the side of the outer cover 12 away from the housing base 11, thereby covering the outer side of the outer cover 12.

[0046] See Figure 3 , Figure 7 and Figure 9 The housing 1 has a mounting cavity 2, which is disposed corresponding to the inner wall of the housing 1. It also includes a circuit board 3 and a trip unit 4. The shape of the circuit board 3 is adapted to the mounting cavity 2 and is installed in the mounting cavity 2. The trip unit 4 is mounted on the circuit board 3 and includes an outer frame 41 and a stationary iron core 42. The stationary iron core 42 passes through the inner side of the outer frame 41. The outer frame 41 protects and fixes the coil, stationary iron core 42 and other components inside the trip unit 4, which together form a magnetic circuit. The stationary iron core 42 provides magnetic poles as part of the magnetic circuit, which are used to attract the armature to close after energization. The outer frame 41 is provided with a connector pin 8. Includes positioning feet 81 and fixing feet 82. In this embodiment, the outer frame 41 is provided with two fixing feet 82 at one end and one positioning foot 81 at the other end. The circuit board 3 is provided with three connecting holes 9. The two fixing feet 82 are passed through the two connecting holes 9. The positioning foot 81 has an inclined annular surface 10. The inclination direction causes the positioning foot 81 to be gradually reduced in the direction away from the outer frame 41. The positioning foot 81 is then guided by the inclined annular surface 10 and embedded into another connecting hole 9. The fixing foot 82 is welded to the circuit board 3 to realize the installation of the trip unit 4.

[0047] See Figures 4-7It also includes a test component 5, which includes a test button 51, a test resistor 52, a button torsion spring 53, and a test spring 54. The housing 11 has a fixing post 6 extending away from the housing 1 and into the mounting cavity 21. The circuit board 3 has a through hole 14 for the fixing post 6 to pass through, and the button torsion spring 53 is fitted onto the fixing post 6. Figure 8 As shown, circuit board 3 has a second through hole 15, and the connecting end of the test spring passes through the second through hole 15 and is connected; circuit board 3 also has a third through hole 16, and the connecting end of the test resistor 52 passes through the third through hole 16 and is connected; the upper contact of the button torsion spring 53 applies pre-pressure to the test button 51, and the lower contact of the other end abuts against the test resistor 52, always connected to the test resistor 52. When the test button 51 is pressed, the test button 51 drives the button torsion spring 53 so that its upper contact contacts the test spring 54. The button torsion spring 53, the test spring 54 and the test resistor 52 cooperate to form a test circuit.

[0048] The circuit board 3 is connected to a power line 20 and a current transformer line 21. A wiring groove 22 is formed between the housing 11 and the outer cover 12 to allow the power line 20 and the current transformer line 21 to pass through. In this embodiment, the wiring groove 22 is opened in the housing 11. The wiring groove 22 and the corresponding plane side wall of the outer cover 12 form a channel for the lines to pass through. The power line 20 is used to connect to the power supply, and the current transformer line 21 is used to connect to the current transformer. After the current transformer senses the residual current signal and meets the triggering conditions of the electronic component board, the trip unit attracts the armature. Alternatively, the wiring groove 22 can also be opened on one side of the outer cover 12 or partially opened on the opposite end faces of the housing 11 and the outer cover 12.

[0049] The side wall of the housing 1 has a button opening 26. In this embodiment, the button opening 26 is formed by splicing the grooves on the opposite sides of the side wall of the housing 11 and the outer cover 12. It also includes a test component 5, which includes a test button 51, which is slidably disposed relative to the housing 1 and engaged in the button opening 26, so that the lower end is located in the mounting cavity 2 and the upper end can protrude from the side wall of the housing 1. The test button 51 can slide to switch between an open state and a closed state. Alternatively, the button opening 26 can also be directly opened on the side wall of the housing 11 or the side wall of the outer cover 12.

[0050] The test button 51 has an anti-detachment part 7, which includes two parts, each protruding from the opposite outer wall of the test button 51 along the sliding direction. After the side of the test button 51 is inserted into the groove in the housing 11, the outer cover 12 is then closed. The groove on the side wall of the outer cover 12 and the groove in the housing 11 are joined to form the button opening 26. Since the channel cross-section of the button opening 26 matches the cross-sectional size of the upper part of the test button 51, the anti-detachment parts 7 on both sides abut against the opposite sides of the housing 11 and the inner side of the outer cover 12 when the test button 51 slides. The end face is designed to limit its sliding out of the mounting cavity 2; the housing 11 is provided with a directional block 17, which protrudes and is fixed to the inner side wall of the housing 11 on the side of the mounting cavity 2, and its position corresponds to the test button 51. The directional block 17 has a directional groove 18, the groove direction is parallel to the sliding direction of the test button 51, and a through opening is left on the side facing the test button 51. When the test button 51 is installed, its lower end side is just embedded in the directional groove 18, so that when sliding along the direction of the directional groove 18, the swing of its lower end in the mounting cavity 2 is limited, thereby improving stability.

[0051] See Figure 2 The outer cover 12 is provided with structural ribs 23, and the structural ribs 23 are provided with receiving parts 24. The receiving parts 24 are set at the nodes of the structural ribs 23, and they are provided with receiving holes 25. When the outer cover 12 is installed, some of the structural ribs 23 are distributed on the outside of the trip unit 4 away from the circuit board 3, forming a blocking effect on the trip unit 4 to limit its swing. The receiving holes 25 are aligned with the position of the fixing post 6. The end of the fixing post 6 passes through the receiving holes 25, thereby limiting the release of the button torsion spring 53 and improving the stability of use.

[0052] The specific work process of this plan is as follows:

[0053] This technical solution directly connects the test resistor 52, trip unit 4, and test spring 54 to the circuit board 3, and then installs the circuit board 3 inside the mounting cavity 2 of the housing 1. The button torsion spring 53 is sleeved on the fixing post 6 of the housing 1, and its upper contact applies pre-pressure to the test button 51 to ensure that the button protrudes from the outer wall of the housing 1 through the button opening 26. The lower contact of the button torsion spring 53 is always connected to the test resistor 52. By pressing the test button 51, the test button 51 presses down on the upper contact of the button torsion spring 53 until it abuts against the test spring 54 to form a test circuit, which energizes the trip unit 4 to attract the armature and achieve the closing operation. This reduces the complex wiring and connection points in traditional circuit breakers, reduces physical wear and failure risks caused by messy wiring, and improves the accuracy and stability of use.

[0054] The foregoing has shown and described the basic principles, main features, and advantages of this technical solution. Those skilled in the art should understand that this technical solution is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this technical solution. Various changes and modifications can be made to this technical solution without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed technical solution. The scope of protection of this technical solution is defined by the appended claims and their equivalents.

Claims

1. An integrated structure for a circuit breaker electronic board, comprising a housing (1), the housing (1) having a mounting cavity (2), the mounting cavity (2) having a button opening (26) corresponding to the side wall of the housing (1), characterized in that: Also includes Circuit board (3), which is installed in the mounting cavity (2); The trip unit (4) is fixed on the circuit board (3) and is used to attract the armature to close after being powered on; as well as Test component (5), said test component (5) includes: A test button (51) is provided at the button opening (26) and is slidably disposed relative to the housing (1); Test resistor (52), which is mounted on the circuit board (3); Button torsion spring (53), the housing (1) is provided with a fixing post (6) for the button torsion spring (53) to be sleeved, the upper contact of the button torsion spring (53) acts on the test button (51) to apply preload, and the lower contact of the other end abuts against the test resistor (52); The test spring (54) has one end connected to the circuit board (3). When the test button (51) is pressed, the test button (51) drives the button torsion spring (53) to make its upper contact contact with the test spring (54). The button torsion spring (53), the test spring (54) and the test resistor (52) work together to form a test circuit.

2. The integrated structure of a circuit breaker electronic board according to claim 1, characterized in that: The trip unit (4) includes an outer frame (41) and a stationary iron core (42). The outer frame (41) is provided with a plug pin (8). The circuit board (3) is provided with a corresponding connection hole (9). The plug pin (8) passes through the connection hole (9) and is then fixed.

3. The integrated structure of a circuit breaker electronic board according to claim 2, characterized in that: The plug-in pin (8) includes a positioning pin (81) and a fixing pin (82). The positioning pin (81) has an inclined annular surface (10) which is tapered away from the outer frame (41).

4. The integrated structure of a circuit breaker electronic board according to claim 1, characterized in that: The circuit board (3) is also provided with a through hole (14), which is used for the fixing post (6) to pass through; The circuit board (3) has a through hole two (15), which is used for the connection end of the test spring (54) to pass through and connect; The circuit board (3) has a through hole three (16) for the connection terminal of the test resistor (52) to pass through and connect.

5. The integrated structure of a circuit breaker electronic board according to claim 1, characterized in that: The housing (1) includes a housing base (11), an outer cover (12) disposed on the housing base (11), and a housing cover (13) disposed on the outer cover (12). The housing base (11) is provided with the fixing post (6), and the housing base (11) is provided with an orientation block (17). The orientation block (17) is provided with an orientation groove (18). The test button (51) has an anti-detachment part (7), which protrudes from the opposite side walls of the test button (51) along the sliding direction. The anti-detachment part (7) is embedded in the directional groove (18), and the groove direction of the directional groove (18) is parallel to the sliding direction of the test button (51). The circuit board (3) has a clearance groove (19) corresponding to the position of the directional block (17).

6. The integrated structure of a circuit breaker electronic board according to claim 5, characterized in that: The circuit board (3) is connected to a power line (20) and a transformer line (21). A wiring groove (22) is formed between the housing (11) and the outer cover (12) for the power line (20) and the transformer line (21) to pass through.

7. The integrated structure of a circuit breaker electronic board according to claim 5, characterized in that: The outer cover (12) is provided with structural ribs (23), which are distributed on the side of the trip unit (4) away from the circuit board (3); The structural reinforcement (23) is provided with a receiving part (24), which has a receiving hole (25) for the outer end of the fixed column (6) to pass through.

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