Circuit breaker with arc fault protection function

Abstract

The utility model discloses a circuit breaker with an arc fault protection function, which comprises a circuit breaker shell in which an actuating mechanism, an electromagnetic mechanism, a power taking mechanism and a circuit board are respectively connected, and is characterized in that the actuating mechanism comprises a contact seat and a lock catch which are connected with each other, a first tripping part is formed on one side of the lock catch, and a second tripping part is formed on the other side of the lock catch; a second tripping part is formed on the other side of the lock catch, and the outside of the second tripping part is connected with a tripping rod; the electromagnetic mechanism comprises a first tripper and a second tripper which are split, the first tripper is located on the outer side of the first tripping part, and the second tripper is located on the outer side of the tripping rod; the circuit board extends to the outer sides of the executing mechanism, the electromagnetic mechanism and the power taking mechanism and is arranged side by side with the executing mechanism, the electromagnetic mechanism and the power taking mechanism inside and outside in the thickness direction of the circuit breaker, and the end part of the power taking mechanism is buckled and connected to the circuit board. According to the utility model, the wiring difficulty of the circuit board can be reduced, and the utilization rate of the internal space of the circuit breaker is improved.

Description

Technical Field

[0001] The utility model relates to a circuit breaker, in particular to a circuit breaker with an arc fault protection function. Background Art

[0002] The leakage protection mechanism and short-circuit protection mechanism of the traditional circuit breaker are split structures and are arranged side by side in the circuit breaker housing on one side of the actuator. When leakage or short circuit occurs in the external circuit, the corresponding protection mechanism can be triggered to push the actuator, 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 reducing the space utilization rate.

[0003] 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 used for short-circuit protection around the outside of the iron core coil used for leakage protection, the two sets of releases can be integrated on the same electromagnetic mechanism. 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.

[0004] However, the defect of this structure is that 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 coils during layout and unable to extend to the electromagnetic mechanism, actuator and other positions, which has certain layout restrictions. If the circuit board is directly installed on the outside of the electromagnetic mechanism and covers it, it will inevitably cause a significant increase in the overall thickness of the circuit breaker and cause gaps to form in other parts of the circuit breaker except the electromagnetic mechanism, that is, the internal space of the circuit breaker cannot be utilized to the maximum extent.

[0005] In addition, the power-taking mechanism, test button and other components in the current circuit breaker need to be distributed in the surrounding area of ​​the electromagnetic mechanism and the actuator, and connected to the circuit board. However, due to the limitations of the above structure, the circuit board, power-taking mechanism, test button and other components in the current circuit breaker are staggered left and right along the length direction of the circuit breaker, which causes the above components to be connected to the circuit board through 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. This wiring method will cause 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.

[0006] Therefore, the arrangement of the electromagnetic mechanism, the power supply mechanism and the circuit board in the existing circuit breaker has the problem of complex circuit structure and great wiring difficulty. Utility Model Content

[0007] The purpose of the utility model is to provide a circuit breaker with arc fault protection function, which can reduce the wiring difficulty of the circuit board and improve the space utilization rate inside the circuit breaker.

[0008] The technical solution of the utility model: a circuit breaker with arc fault protection function, comprising a circuit breaker housing, wherein an actuator, an electromagnetic mechanism, a power-taking mechanism and a circuit board are respectively connected in the circuit breaker housing, wherein the actuator comprises a contact seat and a lock that are connected to each other, wherein one side of the lock forms a first tripping part, and the other side of the lock forms a second tripping part, and the outside of the second tripping part is connected to a tripping rod; the electromagnetic mechanism comprises a split first tripper and a second tripper, wherein the first tripper is located on the outside of the first tripping part, and the second tripper is located on the outside of the tripping rod; the circuit board extends to the outside of the actuator, the electromagnetic mechanism and the power-taking mechanism and is arranged side by side with the actuator, the electromagnetic mechanism and the power-taking mechanism along the thickness direction of the circuit breaker, and the end of the power-taking mechanism is snap-fitted and connected to the circuit board;

[0009] When the circuit breaker has leakage and fault arc problems, the second releaser pushes the trip rod after being triggered, so that the trip rod triggers the locking action through the second tripping part after being pushed, and the actuator is opened;

[0010] 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.

[0011] In the aforementioned circuit breaker with arc fault protection function, the second tripping portion includes a sliding groove located on one side of the lock, and one end of the sliding groove forms a first triggering portion that cooperates with the tripping rod.

[0012] In the aforementioned circuit breaker with arc fault protection function, 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.

[0013] In the aforementioned circuit breaker with arc fault protection function, the power taking mechanism includes a contact piece arranged in the circuit breaker housing, one side of the contact piece forms a first power connection terminal, the other side of the contact piece forms an extrusion portion, one side of the extrusion portion is provided with a second trigger portion connected to the contact seat, the other side of the extrusion portion is provided with a first power taking shaft, the first power taking shaft is provided with a second power connection terminal, the outsides of the first power connection terminal and the second power connection terminal are respectively buckled and connected to the circuit board, one side of the circuit board is connected with a power taking lead, and the power taking lead and the second power connection terminal are electrically connected to each other via the circuit board;

[0014] When the circuit breaker is in the closed state, the contact seat squeezes and deforms the extrusion part through the second trigger part, so that the extrusion part fits with the first power-taking axis after deformation, thereby electrically connecting the circuit board and the power-taking lead wire;

[0015] After the circuit breaker is opened, the contact seat moves to drive the second trigger part to separate from the extrusion part, so that the extrusion part is separated from the first power-taking shaft after losing the extrusion, thereby disconnecting the circuit board and the power-taking lead.

[0016] In the aforementioned circuit breaker with arc fault protection function, the circuit breaker housing includes two groups of split inner housings and outer housings, a first installation cavity is formed between the inner housing and the outer housing, a second installation cavity is formed between the two groups of inner housings, the first installation cavity is symmetrically arranged on the inner and outer sides of the second installation cavity, the actuator and the first release are both located in the first installation cavity, and the trip rod, the power taking mechanism, the second release and the circuit board are all located in the second installation cavity.

[0017] In the aforementioned circuit breaker with arc fault protection function, mutually matching card slots and card blocks are respectively provided on the surrounding side walls of the two inner shells, and the two inner shells are buckled with each other through the card slots and card blocks when connected.

[0018] In the aforementioned circuit breaker with arc fault protection function, a test button made of a light-transmitting material is connected to the side wall of the first installation cavity, an opening is provided on the inner shell on one side of the test button, and an indication module is provided on the circuit board outside the opening. The light emitted by the indication module passes through the inner shell through the opening and shines on the test button, so that the test button has a display function; the test button includes a pressing portion and a sliding portion connected to each other, a snap-fit ​​block that can be deformed inwardly is provided in the middle of the sliding portion, and the lower end of the sliding portion extends to the inner side of the circuit breaker housing and is interlocked with the circuit breaker housing through the snap-fit ​​block.

[0019] In the aforementioned circuit breaker with arc fault protection function, a through shrinkage groove is provided in the middle of the sliding part, the locking block is arranged on the sliding part on one side of the shrinkage groove, a pressing cavity slidably connected to the sliding part is provided on the circuit breaker housing, and a locking plate for snap-fitting and connecting the locking block is provided at the outer end of the pressing cavity.

[0020] In the aforementioned circuit breaker with arc fault protection function, a limiting groove for slidingly connecting the pressing part is provided on the circuit breaker housing outside the pressing cavity, and the clamping plate is located at the interval between the limiting groove and the pressing cavity.

[0021] In the aforementioned circuit breaker with arc fault protection function, a button spring is connected to the circuit breaker housing inside the test button, and the lower end of the sliding part and the button spring are in contact with each other.

[0022] Compared with the prior art, the utility model has the following characteristics:

[0023] (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 after being pushed; 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, the driving coil wrapped outside the first release is removed, the space occupied by the first release in the thickness direction is reduced, and the height of each component in the first installation cavity is consistent, which is convenient for manufacturers to install and layout the circuit board;

[0024] (2) On the basis of the above, the present application can facilitate the wiring of circuit breaker components such as the power taking mechanism and the test button by arranging the circuit board in the second installation cavity and extending it to the outside of the first release and the actuator; at the same time, by installing the second release in the second installation cavity below the actuator, the utilization rate of the internal space of the circuit breaker can be improved and the occupation of the second release in the height direction of the circuit breaker can be reduced;

[0025] (3) The utility model uses the structural coordination between the contact piece and the second trigger part to enable the actuator to extrude the extrusion part through the second trigger part in the closed state, so that the extrusion part is pressed and deformed to fit the first power-taking shaft, thereby realizing the electrical connection between the circuit board and the power-taking lead; when the actuator is triggered to open the switch, the second trigger part is immediately separated from the contact piece, so that the contact piece rebounds to a state of being separated from the first power-taking shaft after losing the limit, that is, the circuit board and the power-taking lead are disconnected; and under the above coordination, the opening and closing of the circuit board connection circuit can be controlled by the actuator, thereby effectively preventing the circuit breaker handle from affecting the disconnection of the power-taking mechanism after being obstructed by the outside, thereby improving the functional stability of the power-taking mechanism;

[0026] At the same time, by extending the circuit board to the outside of the power taking mechanism and cooperating with the arrangement of the first power connection terminal and the second power connection terminal in the power taking mechanism, the power taking mechanism can directly extend the first power connection terminal and the second power connection terminal into the second installation cavity when connected and buckle the circuit board, and then the welding equipment realizes the electrical connection between the first power connection terminal and the circuit board, and the second power connection terminal and the power taking lead through welding, that is, the soft wire structure used for connection is removed and the wiring of the manufacturer is convenient;

[0027] (4) By using the contact piece to fit the first power-taking shaft to realize power-on, compared with the existing power-on method through the torsion spring, on the one hand, the pressure and contact area applied by the contact piece to the first power-taking shaft after being compressed and deformed can be increased, thereby improving the fit stability between the contact piece and the first power-taking shaft; on the other hand, by the method of realizing power-on by squeezing the second trigger part, the contact piece can be rigidly limited in the closed state of the circuit breaker, thereby reducing the possibility of loosening and separation of the contact piece, and further improving its power-on stability;

[0028] (5) Since the circuit board of the utility model will completely cover the electromagnetic mechanism and actuator area of ​​the circuit breaker after installation, it is difficult to install the existing test button in combination with the circuit board. To address this problem, the present application optimizes the connection structure of the test button and the indication module so that the test button can be directly inserted and fastened to the circuit breaker housing from the outside during installation, that is, there is no need to install the test button from the inside of the circuit breaker, which facilitates the manufacturer to install the circuit board and the test button in sequence. At the same time, by extending the circuit board to the outside of the test button and integrating the indication module, the connection line between the existing indication module and the circuit board can be omitted, further reducing the complexity of the circuit in the circuit breaker.

[0029] Therefore, the utility model can reduce the difficulty of wiring the circuit board and improve the space utilization rate inside the circuit breaker. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is a schematic diagram of the structure of the utility model at the second installation cavity;

[0031] Figure 2 It is an exploded view of the trip lever and actuator;

[0032] Figure 3 It is a schematic diagram of the connection between the trip rod and the actuator;

[0033] Figure 4 It is a schematic diagram of the installation of the circuit board on the inner housing;

[0034] Figure 5 This is a schematic diagram of the structure of the utility model at the first installation cavity;

[0035] Figure 6 It is an exploded view of the power taking mechanism;

[0036] Figure 7 It is a schematic diagram of the structure of the contact piece and the contact seat when the circuit breaker is in the open state;

[0037] Figure 8 It is a schematic diagram of the structure of the contact piece and the contact seat in the closed state;

[0038] Fig. 9It is a schematic diagram of the structure of the circuit board and the circuit breaker housing after being disassembled;

[0039] Fig.10 is a cross-sectional view of the test button on the circuit breaker housing.

[0040] The markings in the accompanying drawings are: 1-circuit board, 2-contact seat, 3-lock, 4-trip rod, 5-first trip device, 6-second trip device, 7-contact piece, 8-second trigger part, 9-first power shaft, 10-power lead, 11-inner shell, 12-outer shell, 13-card slot, 14-card block, 15-test button, 16-pressing cavity, 17-clamping plate, 18-limiting slot, 19-button spring , 20-second power-taking axis, 101-indicator module, 301-first tripping part, 302-second tripping part, 303-slide groove, 304-first triggering part, 401-trigger rod, 402-push plate, 701-first power connection end, 702-squeezing part, 901-second power connection end, 111-opening, 151-pressing part, 152-sliding part, 153-engaging block, 154-contraction groove. DETAILED DESCRIPTION

[0041] 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.

[0042] Embodiment. A circuit breaker with arc fault protection function, comprising: Figure 1 As shown, it includes a circuit breaker housing, in which an actuator, an electromagnetic mechanism, a power-taking mechanism and a circuit board 1 are respectively connected, and the outside of the actuator is connected to a handle via a handle connecting rod. The actuator includes a contact seat 2 and a lock 3 connected to each other, and the contact seat 2 and the lock 3 are connected to each other in a conventional manner and limit the handle connecting rod. When the lock 3 rotates to open the gate, the lock 3 releases the limit on the handle connecting rod and enables the handle to open the gate under the action of the handle spring;

[0043] A first release part 301 is formed on one side of the lock 3, and a second release part 302 is formed on the other side of the lock 3. A release rod 4 is connected to the outside of the second release part 302. The electromagnetic mechanism includes a split first release 5 and a second release 6. The first release 5 is located on the outside of the first release part 301, and the second release 6 is located on the outside of the release rod 4. The circuit board 1 extends to the outside of the actuator, the electromagnetic mechanism and the power-taking mechanism and is arranged side by side with the actuator, the electromagnetic mechanism and the power-taking mechanism in the thickness direction of the circuit breaker. The end of the power-taking mechanism is buckled and connected to the circuit board 1.

[0044] When the circuit breaker has leakage and fault arc problems, the second release 6 pushes the trip rod 4 after being triggered, so that the trip rod 4 triggers the lock 3 to act through the second trip part 302 after being pushed, and the actuator is opened;

[0045] When a short circuit occurs in the circuit breaker, the first release 5 pushes the first tripping part 301 after being triggered, so that the lock 3 performs an opening action after being pushed, thereby realizing the opening of the actuator.

[0046] The second release portion 302 includes a slide groove 303 located at one side of the lock buckle 3 , and one end of the slide groove 303 forms a first trigger portion 304 that cooperates with the release rod 4 .

[0047] The trip rod 4 is rotatably connected to the circuit breaker housing, a reset spring is connected between the trip rod 4 and the circuit breaker housing, a trigger rod 401 is provided on one side of the trip rod 4, the end of the trigger rod 401 extends into the slide groove 303, and a push plate 402 cooperating with the second release 6 is provided on the other side of the trip rod 4; the trip rod 4 rotates after being pushed by the second release 6, and the trigger rod 401 squeezes the first trigger part 304 during the rotation process, so that the first trigger part 304 triggers the lock 3 to open the gate after being squeezed.

[0048] The power-taking mechanism includes a contact piece 7 arranged in the circuit breaker housing, the contact piece 7 is a metal spring with a conductive function, one side of the contact piece 7 forms a first power connection terminal 701, the other side of the contact piece 7 forms an extrusion portion 702, one side of the extrusion portion 702 is provided with a second trigger portion 8 connected to the contact seat 2, the other side of the extrusion portion 702 is provided with a first power-taking shaft 9, and the extrusion portion 702 is separated from the first power-taking shaft 9 in a natural state; the first power-taking shaft 9 is provided with a second power connection terminal 901, the outside of the first power connection terminal 701 and the second power connection terminal 901 are respectively buckled and connected to the circuit board 1, one side of the circuit board 1 is connected with a power-taking lead 10, the outside of the power-taking lead 10 is connected to the wiring terminal, and the power-taking lead 10 and the second power connection terminal 901 are electrically connected to each other via the circuit board 1;

[0049] When the circuit breaker is in the closed state, the contact holder 2 is squeezed and deformed by the second triggering part 8 on the extrusion part 702, so that the extrusion part 702 fits with the first power-taking shaft 9 after deformation, thereby electrically connecting the circuit board 1 and the power-taking lead 10 to each other;

[0050] After the circuit breaker is opened, the contact seat 2 moves to drive the second trigger part 8 to separate from the extrusion part 702, so that the extrusion part 702 is separated from the first power-taking shaft 9 after losing the extrusion, thereby disconnecting the circuit board 1 and the power-taking lead 10 from each other.

[0051] The circuit breaker housing is provided with a mounting groove for limiting the contact piece 7, and the contact piece 7 is buckled and connected to the circuit breaker housing through the mounting groove.

[0052] A protective cover is provided between the contact piece 7 and the circuit board 1, and the outside of the protective cover is detachably connected to the circuit breaker housing or the circuit board 1. The contact piece 7 and the end of the first power-taking shaft 9 respectively form a first power connection terminal 701 and a second power connection terminal 901 after passing through the protective cover.

[0053] The circuit breaker housing includes two groups of split inner housings 11 and outer housings 12, a first installation cavity is formed between the inner housing 11 and the outer housing 12, a second installation cavity is formed between the two groups of inner housings 11, the first installation cavity is symmetrically arranged on the inner and outer sides of the second installation cavity, the number of the actuators and the first release 5 is two groups and they are respectively located in the first installation cavities on both sides, the two groups of actuators are transmission connected and realize closing and opening actions at the same time; the trip rod 4, the power taking mechanism, the second release 6 and the circuit board 1 are all located in the second installation cavity; the inner housing 11 is provided with an arc groove for the trigger rod 401 to pass through.

[0054] Mutually matching clamping grooves 13 and clamping blocks 14 are respectively provided on the surrounding side walls of the two inner shells 11 . When the two inner shells 11 are connected, they are buckled with each other through the clamping grooves 13 and the clamping blocks 14 .

[0055] The circuit board 1 can be configured as a split structure as required, and can be staggered inside and outside according to the installation height of the components in the second installation cavity, thereby maximizing the use of the internal space of the circuit breaker.

[0056] A test button 15 made of a light-transmitting material is connected to the side wall of the first installation cavity, an opening 111 is provided on the inner shell 11 on one side of the test button 15, an indication module 101 is provided on the circuit board 1 outside the opening 111, and light emitted by the indication module 101 passes through the inner shell 11 through the opening 111 and irradiates the test button 15, so that the test button 15 has a display function, and the indication module 101 can optionally use an LED lamp, and the outside of the LED lamp is connected to a fault indication unit integrated on the circuit board 1; the test button 15 includes a pressing portion 151 and a sliding portion 152 that are connected to each other, a snap-fit ​​block 153 that can be deformed inwardly is provided in the middle of the sliding portion 152, and the lower end of the sliding portion 152 extends to the inner side of the circuit breaker housing and is snap-fitted with the circuit breaker housing through the snap-fit ​​block 153.

[0057] A through contraction groove 154 is provided in the middle of the sliding portion 152, and the locking block 153 is arranged on the sliding portion 152 on one side of the contraction groove 154. A pressing cavity 16 slidably connected to the sliding portion 152 is provided on the circuit breaker housing, and a locking plate 17 is provided at the outer end of the pressing cavity 16 to be snap-fitted and connected to the locking block 153.

[0058] A limiting groove 18 slidably connected to the pressing portion 151 is provided on the circuit breaker housing outside the pressing cavity 16, and the locking plate 17 is located at the interval between the limiting groove 18 and the pressing cavity 16. A limiting step is formed between the pressing portion 151 and the sliding portion 152. When the test button 15 is fully buckled, the inner end of the pressing portion 151 is fitted to the bottom surface of the limiting groove 18 via the limiting step to form a limit.

[0059] A button spring 19 is connected to the circuit breaker housing inside the test button 15, the lower end of the sliding part 152 and the button spring 19 are in contact with each other, the outside of the button spring 19 is electrically connected to the circuit board 1, one end of the button spring 19 is in contact with the circuit breaker housing and forms a limit for the rotation position of the button spring 19, and the other end of the button spring 19 is provided with a second power-taking shaft 20 electrically connected to the circuit board 1 on the outside, the second power-taking shaft 20 is snap-fitted and connected to the circuit board 1 and welded to the circuit board 1, and the button spring 19 and the second power-taking shaft 20 are separated from each other under normal conditions.

[0060] Working principle of the utility model: The utility model arranges the actuator, the first release 5 and the test button 15 in the first installation cavity, and arranges the contact piece 7, the second release 6 and the circuit board 1 in the second installation cavity, so that the circuit board 1 can cover the actuator and the first release 5 area of ​​the circuit breaker after arrangement. On this basis, by directly fastening and connecting the first power-taking shaft 9, the contact piece 7 and the second power-taking shaft 20 to the circuit board 1 and connecting the circuit board 1 by soldering, the circuit breaker soft wire connection structure can be effectively reduced, and the manufacturer can perform welding from the outside through welding equipment after the circuit board 1 is installed, thereby improving its welding efficiency and reducing labor costs.

[0061] When the circuit breaker is in the closed state, the second triggering part 8 on the actuator squeezes the extrusion part 702 of the contact piece 7, so that the extrusion part 702 fits with the first power-taking axis 9 after being deformed by pressure, so that the circuit board 1 can draw power from the power-taking lead 10.

[0062] When a short circuit occurs in the external circuit, the first release 5 pushes the first release part 302 after being triggered, so that the lock buckle 3 rotates to open the gate after being pushed. When the lock buckle 3 rotates to open the gate, the slide groove 303 rotates relative to the trigger rod 401, and a space is reserved for avoiding the trigger rod 401, so that the trigger rod 401 does not contact the lock buckle 3 to form an obstacle during the rotation and opening process of the lock buckle 3, thereby ensuring the stability of the action of the lock buckle 3.

[0063] When leakage occurs in the external circuit, the second release 6 detects it and drives the push rod to push out, thereby pushing the push plate 402. After being pushed, the push plate 402 drives the trip rod 4 to rotate to overcome the elastic force of the reset spring, and the trigger rod 401 squeezes the first trigger part 304 during the rotation process, so that the lock buckle 3 rotates to open the gate after being squeezed.

[0064] After the circuit breaker is opened, the opening action of the actuator will drive the second trigger part 8 to move away from the extrusion part 702, thereby releasing the extrusion limit of the extrusion part 702. After the limit is released, the extrusion part 702 rebounds to a natural state and then separates from the first power-taking shaft 9, thereby disconnecting the circuit board and the power-taking lead 10 from each other.

[0065] The test button 15 is arranged in the first installation cavity on one side, and is directly inserted into the pressing cavity 16 from the outside of the circuit breaker housing during installation, so that the engaging block 153 is blocked by the engaging plate 17 during the insertion process and shrinks inwards and then engages with the inner side of the engaging plate 17, that is, the test button 15 is limited by the cooperation of the engaging plate 17 and the engaging block 153 to prevent the test button 15 from being released. After being buckled in, the test button 15 is attached to the button spring 19 below through the sliding portion 152, and can slide downward along the pressing cavity 16 under the action of pressing, driving the button spring 19 to bend and deform, thereby realizing the press test function.

[0066] During the test, the operator presses the test button 15, so that the test button 15 slides downward after being pressed and drives the button spring 19 to deform until it contacts the second power-taking shaft 20 to achieve line conduction. After the line is connected, the circuit board 1 is triggered and generates a real leakage state, thereby driving the circuit breaker to trip and achieve the test effect. After the test is completed, the button spring 19 rebounds and drives the test button 15 to rise, completing the reset. When the fault indication unit detects a fault, the control indication module 101 emits light, and the light generated by the indication module 101 passes through the opening 111 to irradiate the test button 15, and is transmitted to the outside through the transparent test button 15, so that outsiders can observe the fault condition of the circuit breaker through the test button 15, thereby realizing the fault display function.

Claims

1. A circuit breaker with arc fault protection function, comprising a circuit breaker housing, wherein an actuator, an electromagnetic mechanism, a power supply mechanism and a circuit board (1) are respectively connected in the circuit breaker housing, characterized in that: The actuator comprises a contact seat (2) and a lock (3) connected to each other, one side of the lock (3) forms a first release portion (301), the other side of the lock (3) forms a second release portion (302), and the outside of the second release portion (302) is connected to a release rod (4); the electromagnetic mechanism comprises a split first release (5) and a second release (6), the first release (5) is located outside the first release portion (301), and the second release (6) is located outside the release rod (4); the circuit board (1) extends to the outside of the actuator, the electromagnetic mechanism and the power taking mechanism and is arranged side by side with the actuator, the electromagnetic mechanism and the power taking mechanism in an inner and outer manner along the thickness direction of the circuit breaker, and the end of the power taking mechanism is snap-connected to the circuit board (1); When the circuit breaker has leakage and fault arc problems, the second release (6) pushes the tripping rod (4) after being triggered, so that the tripping rod (4) triggers the lock (3) to act through the second tripping part (302) after being pushed, thereby realizing the opening of the actuator; When a short circuit occurs in the circuit breaker, the first release (5) pushes the first release part (301) after being triggered, so that the lock (3) performs an opening action after being pushed, thereby realizing the opening of the actuator.

2. A circuit breaker with arc fault protection function according to claim 1, characterized in that: The second release portion (302) comprises a slide groove (303) located on one side of the lock (3), and one end of the slide groove (303) forms a first trigger portion (304) that cooperates with the release rod (4).

3. A circuit breaker with arc fault protection function according to claim 2, characterized in that: The trip rod (4) is rotatably connected to the circuit breaker housing, a reset spring is connected between the trip rod (4) and the circuit breaker housing, a trigger rod (401) is provided on one side of the trip rod (4), the end of the trigger rod (401) extends into the slide groove (303), and a push plate (402) cooperating with the second tripper (6) is provided on the other side of the trip rod (4).

4. A circuit breaker with arc fault protection function according to claim 1, characterized in that: The power supply mechanism comprises a contact piece (7) arranged in the circuit breaker housing, one side of the contact piece (7) forms a first power connection terminal (701), the other side of the contact piece (7) forms an extrusion portion (702), one side of the extrusion portion (702) is provided with a second trigger portion (8) connected to the contact seat (2), the other side of the extrusion portion (702) is provided with a first power supply shaft (9), the first power supply shaft (9) is provided with a second power connection terminal (901), the outsides of the first power connection terminal (701) and the second power connection terminal (901) are respectively buckled and connected to the circuit board (1), one side of the circuit board (1) is connected with a power supply lead (10), and the power supply lead (10) and the second power connection terminal (901) are electrically connected to each other via the circuit board (1); When the circuit breaker is in a closed state, the contact seat (2) squeezes and deforms the extrusion portion (702) via the second trigger portion (8), so that the extrusion portion (702) fits with the first power-taking shaft (9) after deformation, thereby electrically connecting the circuit board (1) and the power-taking lead (10). After the circuit breaker is opened, the contact seat (2) moves to drive the second triggering part (8) to separate from the squeezing part (702), so that the squeezing part (702) is separated from the first power-taking shaft (9) after losing the squeezing, thereby disconnecting the circuit board (1) and the power-taking lead (10).

5. A circuit breaker with arc fault protection function according to claim 1, characterized in that: The circuit breaker housing comprises two groups of split inner housings (11) and outer housings (12); a first installation cavity is formed between the inner housing (11) and the outer housing (12); a second installation cavity is formed between the two groups of inner housings (11); the first installation cavity is symmetrically arranged on both sides of the inside and outside of the second installation cavity; the actuator and the first release (5) are both located in the first installation cavity; and the trip rod (4), the power taking mechanism, the second release (6) and the circuit board (1) are all located in the second installation cavity.

6. A circuit breaker with arc fault protection function according to claim 5, characterized in that: Mutually matching clamping grooves (13) and clamping blocks (14) are respectively provided on the surrounding side walls of the two inner shells (11); when the two inner shells (11) are connected, they are buckled together via the clamping grooves (13) and the clamping blocks (14).

7. A circuit breaker with arc fault protection function according to claim 5, characterized in that: A test button (15) made of a light-transmitting material is connected to the side wall of the first installation cavity; an opening (111) is provided on the inner shell (11) on one side of the test button (15); an indication module (101) is provided on the circuit board (1) outside the opening (111); light emitted by the indication module (101) passes through the inner shell (11) through the opening (111) and irradiates the test button (15), so that the test button (15) has a display function; the test button (15) comprises a pressing portion (151) and a sliding portion (152) connected to each other; a snap-fit ​​block (153) that can be deformed inwards is provided in the middle of the sliding portion (152); the lower end of the sliding portion (152) extends to the inner side of the circuit breaker housing and is snap-fitted with the circuit breaker housing via the snap-fit ​​block (153).

8. A circuit breaker with arc fault protection function according to claim 7, characterized in that: A through contraction groove (154) is provided in the middle of the sliding portion (152); the engaging block (153) is arranged on the sliding portion (152) on one side of the contraction groove (154); a pressing cavity (16) slidably connected to the sliding portion (152) is provided on the circuit breaker housing; and an engaging plate (17) is provided at the outer end of the pressing cavity (16) for buckling and connecting to the engaging block (153).

9. A circuit breaker with arc fault protection function according to claim 8, characterized in that: A limiting groove (18) slidably connected to the pressing portion (151) is provided on the circuit breaker housing outside the pressing cavity (16), and the clamping plate (17) is located at the interval between the limiting groove (18) and the pressing cavity (16).

10. A circuit breaker with arc fault protection function according to claim 7, characterized in that: A button spring (19) is connected to the circuit breaker housing inside the test button (15), and the lower end of the sliding part (152) and the button spring (19) are in contact with each other.

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