leakage protection circuit breaker

Abstract

An electric leakage protector, including a shell assembly, the shell assembly includes a protective shell, the upper portion of the protective shell is provided with a first wire, the first wire extends from the upper portion of the protective shell to the outside, the first wire is electrically connected with one end of an electromagnetic coil, the other end of the electromagnetic coil is connected with a contact plate; the bottom of the protective shell is provided with a second wire, the second wire extends from the lower portion of the protective shell to the outside, the second wire is connected with a contact plate through a conveying line. Relative to the prior art, the technical effects of the utility model are that, the utility model is closely cooperated through the electromagnetic coil, the sliding column, the pin and the control board and other components, when the circuit appears short circuit or high load, the current changes instantaneously, the electromagnetic coil magnetic field changes, stronger magnetic attraction force is generated to the sliding column, and the electric safety is greatly improved.

Description

Technical Field

[0001] This utility model belongs to the field of low-voltage electrical appliances, specifically a leakage current protection circuit breaker. Background Technology

[0002] Residual current circuit breakers are widely used in industrial, commercial, and residential fields. When leakage, overload, or short circuit occurs in the circuit, the residual current circuit breaker can quickly cut off the fault power supply within a very short time and protect the safety of people and electrical equipment.

[0003] Chinese patent CN201810528024.2 discloses a residual current circuit breaker, including a circuit breaker and a handle, an operating mechanism, an overload protection unit, and a short-circuit protection unit disposed within the circuit breaker housing. The residual current protection unit and the short-circuit protection unit are respectively disposed on one side of the operating mechanism, and the overload protection unit is disposed on the other side of the operating mechanism. The residual current protection unit includes a current transformer and a trip unit. The current transformer is disposed below the short-circuit protection unit. By placing the current transformer of the residual current protection unit below the short-circuit protection unit, not only can the residual current protection function be added while ensuring current carrying capacity and space dimensions, but it also has the characteristics of simple structure and can effectively reduce manufacturing costs.

[0004] Based on the aforementioned existing technologies, there are potential hazards in the circuit system during application. With prolonged operation, the insulation material of the equipment loses its insulating properties due to aging, wear, moisture, and overheating, leading to direct contact between conductors at different potentials and causing short circuits. Simultaneously, exceeding the rated load of the equipment can cause excessive current and equipment overheating, accelerating insulation aging and even damage, further triggering short circuits, damaging circuit breakers, and potentially causing fires. When a short circuit or excessive load interrupts the circuit, an electric arc is generated. However, existing technologies cannot flexibly and quickly adjust the arc-extinguishing mechanism according to the arc size, making rapid and effective arc extinguishing difficult. This results in arc erosion of the circuit breaker, shortening its lifespan or even causing it to burn out, affecting the stable operation of the circuit system. Utility Model Content

[0005] The technical problem to be solved by this utility model is: how to design a leakage current protection circuit breaker that can respond to leakage current in a very short time and effectively avoid electric shock accidents caused by leakage current.

[0006] The specific technical solution of this utility model is as follows:

[0007] A residual current circuit breaker includes a housing assembly, which includes a protective shell. A first conductor is located at the upper part of the protective shell, extending to the outside. The first conductor is electrically connected to one end of an electromagnetic coil, and the other end of the electromagnetic coil is connected to a contact plate. A second conductor is located at the bottom of the protective shell, extending to the outside. The second conductor is connected to a contact plate via a transmission line. A sliding post, made of magnetic material, is inserted inside the electromagnetic coil. One end of a push rod is fixed at the end of the sliding post. A lever is located on the outward extension line of the push rod and rotatably connected to the housing assembly. One end of a rectangular ring is hinged to the housing assembly, and the other end of the rectangular ring is hinged to one end of a control plate. The other end of the control plate presses against one end of the control plate. The middle part of the control plate is rotatably connected to the housing assembly, forming a four-bar linkage with the lever, rectangular ring, control plate, and housing assembly. A guide plate is located at the end of the contact plate away from the limiting ring, and the side of the guide plate away from the contact plate is attached to the inner wall of the protective shell. The guide plate is made of elastic material.

[0008] The protective shell has a conductive plate inside, and a first fixing sleeve is fixed to one side of the conductive plate. The first fixing sleeve is connected to a first wire. An electromagnetic coil is connected to the outer surface of the conductive plate through a wire. A dividing plate is provided at one end of the electromagnetic coil, and a limiting plate is provided at the other end of the electromagnetic coil. The end of the push rod away from the sliding column passes through the limiting plate. A bracket is fixed on the limiting plate. The side of the bracket near the sliding column is set as arc. The limiting plate limits the sliding column through the bracket.

[0009] A third compression spring is provided on the outer surface of the top rod; a rectangular ring is connected to one end of the first compression spring, and one end of the first compression spring is connected to the other side of the limiting plate; a limiting ring is movably provided at the bottom of the control plate, one end of the limiting ring is hinged to the electrical plate, the other end of the limiting ring is a rod, and a second compression spring is sleeved on the outer surface of the rod, and the end of the second compression spring away from the limiting ring is connected to the bottom of the control plate.

[0010] The protective housing has a grounding plate located inside the contact plate and below it. A conveyor line is located at the bottom of the grounding plate, with one end of the conveyor line connected to the grounding plate and the other end connected to a connecting plate. The connecting plate is located at the bottom of the grounding plate and is electrically connected to the second conductor. The grounding plate is fixedly installed inside the protective housing. A second fixing sleeve is located at the bottom of the connecting plate and is used to limit the end of the second conductor.

[0011] An arc-extinguishing component is installed inside the protective housing, and the arc-extinguishing component is located inside the housing component.

[0012] The arc extinguishing assembly includes multiple sets of metal grids. One side of each metal grid has a protrusion, and a sliding plate is movably mounted on the metal grid through the protrusion. One side of the sliding plate is fixedly mounted on the inner wall of the protective shell, and the other side of the sliding plate is connected to the dividing plate. There are six sets of metal grids. Each set of metal grids is slidably connected to the sliding plate through the protrusion. The outer surface of each set of protrusions is provided with the same first return spring, and each first return spring is made of an elastic material.

[0013] The bottom of the dividing plate is provided with a contact plate. The end of the contact plate away from the dividing plate is connected to the control line. A reset bead is fixed on the outer surface of the control line. A third reset spring is provided on the side of the reset bead facing the dividing plate. The end of the third reset spring away from the reset bead is connected to the bottom of the dividing plate.

[0014] The top of the dividing plate is equipped with a mounting plate, and the bottom of the mounting plate is connected to the dispersing plate via a second return spring. The bottom of the dispersing plate is equipped with multiple triangular protrusions, and the mounting plate is fixed inside the protective shell.

[0015] A control line is provided on the outer surface of the sliding column near the bracket, and the control line runs longitudinally through the dividing plate. An elastic plate is provided inside the dividing plate for rotation, and a drive rod is slidably provided on the right side of the elastic plate. The bottom of the drive rod is fixedly connected to the outer surface of the sliding column. A bracket is provided on the side of the limiting plate facing the sliding column, and the bracket is in close contact with the outer surface of the sliding column.

[0016] Compared to existing technologies, the technical advantages of this invention are as follows: Through the close collaboration of components such as the electromagnetic coil, sliding column, pin, and control board, when a short circuit or high load occurs in the circuit, the current changes instantaneously, altering the magnetic field of the electromagnetic coil and generating a stronger magnetic attraction on the sliding column. This overcomes the spring force, causing the sliding column to move the pin. The pin then touches the control board, which quickly changes the contact state between the grounding plate and the contact plate, cutting off the circuit. This allows for a rapid response to leakage current, effectively preventing electric shock accidents caused by leakage current, providing a solid guarantee for personnel safety and normal equipment operation, and greatly improving electrical safety. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of a utility model.

[0018] Figure 2 This is a front view schematic diagram of the utility model.

[0019] Figure 3 This is a cross-sectional schematic diagram of the utility model (I).

[0020] Figure 4 This is a schematic diagram of the sliding column and related structures.

[0021] Figure 5This is a schematic diagram of a metal grid.

[0022] Figure 6 This is a schematic diagram of the sealing plate.

[0023] Figure 7 This is a schematic diagram of the control panel.

[0024] Figure 8 This is a schematic diagram of the paddle's initial state.

[0025] Figure 9 This is a cross-sectional schematic diagram (II) of the utility model.

[0026] Figure 10 for Figure 9 Enlarged structural diagram at point A in the middle.

[0027] Figure 11 yes Figure 9 Enlarged structural diagram at point B. Detailed Implementation

[0028] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0029] like Figure 1-3 A residual current circuit breaker includes a housing assembly 1, which includes a protective housing 101.

[0030] The upper part of the protective housing 101 is provided with a first wire 102. The first wire 102 extends from the upper part of the protective housing 101 to the outside. The first wire 102 is electrically connected to one end of the electromagnetic coil 150, and the other end of the electromagnetic coil 150 is connected to a contact plate 116.

[0031] The bottom of the protective housing 101 is provided with a second wire 103. The second wire 103 extends from the bottom of the protective housing 101 to the outside. The second wire 103 is connected to the junction plate 114 through the conveyor line 113. The conveyor line 113 is an elastic element.

[0032] Whether the contact plate 116 and the grounding plate 114 are connected determines whether the first conductor 102 and the second conductor 103 are connected, and thus determines whether power can be transmitted.

[0033] An electromagnetic coil 150 is provided with a sliding post 119 that can slide along it. The sliding post 119 is made of magnetic material. One end of the push rod 123 is fixed at the end of the sliding post 119. A lever 106 is provided on the outward extension line of the push rod 123. The lever 106 is rotatably connected to the housing assembly 1. One end of the housing assembly 1 is hinged to a rectangular ring 107. The other end of the rectangular ring 107 is hinged to one end of the control plate 109. The other end of the control plate 109 is pressed against one end of the control plate 109.

[0034] The control plate 109 is rotatably connected to the housing assembly 1 at its center, making the paddle 106, rectangular ring 107, control plate 109 and housing assembly 1 a four-bar linkage.

[0035] A guide plate 115 is provided at one end of the power receiving plate 114 away from the limiting ring 111, and the side of the guide plate 115 away from the power receiving plate 114 is attached to the inner wall of the protective shell 101. The guide plate 115 is made of an elastic material.

[0036] like Figure 3 For stable sliding, a conductive plate 104 is provided inside the protective shell 101. A first fixing sleeve 105 is fixed to one side of the conductive plate 104. A first wire 102 is connected inside the first fixing sleeve 105. An electromagnetic coil 150 is connected to the outer surface of the conductive plate 104 through a wire. A dividing plate 121 is provided at one end of the electromagnetic coil 150, and a limiting plate 117 is provided at the other end of the electromagnetic coil 150. The end of the top rod 123 away from the sliding column 119 passes through the limiting plate 117. A bracket 118 is fixed on the limiting plate 117. The side of the bracket 118 near the sliding column 119 is set as arc. The limiting plate 117 limits the sliding column 119 through the bracket 118.

[0037] like Figure 4 To facilitate reset, a third compression spring 122 is provided on the outer surface of the push rod 123.

[0038] like Figure 3 To ensure stable operation, the rectangular ring 107 is connected to one end of the first compression spring 108, and one end of the first compression spring 108 is connected to the other side of the limiting plate 117.

[0039] like Figure 3 A limiting ring 111 is movably provided at the bottom of the control board 109. One end of the limiting ring 111 is hinged to the power contact plate 114. The other end of the limiting ring 111 is a rod, and a second compression spring 110 is sleeved on the outer surface of the rod. The end of the second compression spring 110 away from the limiting ring 111 is connected to the bottom of the control board 109.

[0040] The protective housing 101 has a grounding plate 114 located inside the contact plate 116, and the grounding plate 114 is located below the contact plate 116. The bottom of the grounding plate 114 has a conveyor line 113, and one end of the conveyor line 113 near the grounding plate 114 is electrically connected to the grounding plate 114. The other end of the conveyor line 113 is electrically connected to the connecting plate 112, which is located at the bottom of the grounding plate 114. The connecting plate 112 is electrically connected to the second conductor 103, and the grounding plate 114 is fixedly installed inside the protective housing 101. The bottom of the connecting plate 112 has a second fixing sleeve, which is used to limit the end of the second conductor 103.

[0041] like Figure 1-9 The protective housing 101 is provided with an arc extinguishing component 2, which is located inside the housing assembly 1. The housing assembly 1 eliminates the electric arc generated inside by the arc extinguishing component 2.

[0042] like Figure 5 The arc extinguishing component 2 includes multiple sets of metal grid plates 201. One side of each metal grid plate 201 has a protrusion 203. A sliding plate 202 is movably mounted on the metal grid plate 201 through the protrusion 203. One side of the sliding plate 202 is fixedly mounted on the inner wall of the protective shell 101, and the other side of the sliding plate 202 is connected to the dividing plate 121. There are six sets of metal grid plates 201. Each set of metal grid plates 201 is slidably connected to the sliding plate 202 through the protrusion 203. The outer surface of each set of protrusion 203 is provided with the same first return spring 204. The material of each first return spring 204 is set to an elastic material.

[0043] The top of the dividing plate 121 is provided with a mounting plate 120. The bottom of the mounting plate 120 is connected to the dispersing plate 124 through a second return spring 171. The bottom of the dispersing plate 124 is provided with multiple triangular protrusions, and the mounting plate 120 is fixed inside the protective shell 101.

[0044] A control line 190 is provided on the outer surface of the sliding column 119 near the bracket 118, and the control line 190 extends longitudinally through the dividing plate 121. An elastic plate 170 is rotatably provided inside the dividing plate 121, and a drive rod 125 is slidably provided on the right side of the elastic plate 170. The bottom of the drive rod 125 is fixedly connected to the outer surface of the sliding column 119. A bracket 118 is provided on the side of the limiting plate 117 facing the sliding column 119, and the bracket 118 is in close contact with the outer surface of the sliding column 119.

[0045] like Figure 10 The bottom of the dividing plate 121 is provided with a contact plate 116. The end of the contact plate 116 away from the dividing plate 121 is connected to the control line 190. A reset bead 192 is fixedly provided on the outer surface of the control line 190. A third reset spring 191 is provided on the side of the reset bead 192 facing the dividing plate 121. The end of the third reset spring 191 away from the reset bead 192 is connected to the bottom of the dividing plate 121.

[0046] like Figure 1-11 Its working principle is as follows:

[0047] S100, under normal use:

[0048] First, insert the first wire 102 and the second wire 103 into the top and bottom of the protective housing 101 respectively, and limit and fix the power connection terminals of the first wire 102 and the second wire 103 through the first fixing sleeve 105 and the second fixing sleeve inside the protective housing 101 respectively.

[0049] Subsequently, the lever 106 is moved. In the initial state (before moving), the lever 106 is located near the bottom of the protective housing 101. When the lever 106 is moved counterclockwise (i.e., the lever 106 rotates towards the top of the protective housing 101), it eventually reaches the desired position. Figure 9 In this state, as the paddle 106 rotates, the lower end of the rectangular ring 107 moves downward, applying downward pressure to the end of the control plate 109 near the paddle 106. This causes the control plate 109 to rotate clockwise, with the end of the control plate 109 near the paddle 106 moving downward and the end of the control plate 109 away from the paddle 106 moving upward (lever principle). Due to the clockwise rotation of the control plate 109, the connection between the control plate 109 and the second compression spring 110 at the bottom of the control plate 109 is less than the initial distance. This, combined with the limiting ring 111, generates a squeezing force on the second compression spring 110, causing the second compression spring 110 to be in a compressed state. In the retracted state, the rectangular ring 107 exerts an upward thrust on the paddle 106. However, when the paddle 106 rotates to a certain angle, the connection point between the paddle 106 and the rectangular ring 107 crosses the quadrant point. At this time, the rectangular ring 107 applies force to the paddle 106, causing the paddle 106 to rotate counterclockwise. The position of the paddle 106 is fixed by the limiting of the protective shell 101. At this time, the end of the control plate 109 away from the paddle 106 will be higher than the initial position. This, combined with the elasticity of the guide plate 115 and the pressure of the second compression spring 110, makes the contact plate 114 also located in a high position, and its surface will be in contact with the contact plate 116.

[0050] As the control plate 109 rotates clockwise, the connection between the rectangular ring 107 and the first compression spring 108 becomes greater than the initial distance, causing the first compression spring 108 to move from its original neutral state to a stretched state.

[0051] Then, the first conductor 102 will form a path with the conductor plate through the first fixing sleeve 105 to the input end of the electromagnetic coil 150, while the output end of the electromagnetic coil 150 is electrically connected to the contact plate 116. At the same time, the contact plate 116 and the receiving plate 114 are in contact with each other, and the conveying line 113 is electrically connected to the surface of the connecting plate 112. This allows the conveying line 113 at the bottom of the receiving plate 114 to transmit the power in the first conductor 102 to the connecting plate 112, and then through the connecting plate 112 and the second fixing sleeve to the inside of the second conductor 103, thereby completing the purpose of power transmission.

[0052] S200, When a short circuit occurs:

[0053] If a short circuit occurs between the first conductor 102 and the second conductor 103, the instantaneous increase in current will cause the electromagnetic coil 150 to generate a high magnetic attraction force on the sliding column 119. This magnetic attraction force will overcome the elastic force of the third compression spring 122, causing the sliding column 119 to move laterally along the support 118 and the electromagnetic coil 150 (that is...). Figure 9 (To the right), then the push rod 123 will penetrate the limiting plate 117 and contact the surface of the paddle 106. The push rod 123 and the surface of the paddle 106 will contact and apply pressure to it, causing the paddle 106 to rotate clockwise, and causing the rectangular ring 107 to gradually rotate, changing the direction of the force transmitted to the paddle 106. When the paddle 106 rotates to a certain angle, the connection point between the paddle 106 and the rectangular ring 107 crosses the quadrant point. At this time, the rectangular ring 107 applies force to the paddle 106, which will drive the paddle 106 to rotate clockwise. The lower end of the rectangular ring 107 moves upward and applies a downward pulling force to the end of the control plate 109 near the paddle 106. Then, through the mutual cooperation of the first compression spring 108 and the second compression spring 110, the control plate 109 rotates clockwise. The end of the control plate 109 near the paddle 106 moves downward and the end of the control plate 109 away from the paddle 106 moves upward, thereby completing the reset of the control plate 109.

[0054] At the same time, paddle 106 will rotate clockwise and return to its initial state (see details). Figure 8 During this process, as the control board 109 returns to its initial position, the end of the control board 109 furthest from the lever 106 reaches a low position (see [link to specific details]). Figure 8 When the pressure is applied, the grounding plate 114 is also in a low position, and its surface is separated from the contact plate 116. The grounding plate 114 is no longer in contact with the contact plate 116, thereby achieving the purpose of leakage protection.

[0055] It should be noted that the conveyor line 113 is made of a flexible material. This way, when the contact plate 114 and the contact plate 116 are no longer in contact (i.e., the contact plate 114 will rotate towards the connecting plate 112), the conveyor line 113 will not be damaged due to frequent bending. In addition, the guide plate 115 and the contact plate 114 are fixedly connected, and the guide plate 115 itself has a certain degree of elasticity. When the control plate 109 rotates counterclockwise and does not contact the contact plate 114 or reduces the pressure between the control plate 109 and the contact plate 114, the contact plate 114 will move upward in coordination with the elasticity of the guide plate 115 and come into contact with the bottom of the contact plate 116.

[0056] S300, Arc occurs

[0057] When the grounding plate 114 and the contact plate 116 are no longer in contact, the current will not disappear instantaneously due to its continuity and inertia. In the extremely short instant when the contact plate 116 and the grounding plate 114 separate, the air between the two plates is broken down under the action of a strong electric field. Air is a good insulator, but under the action of high voltage and strong electric field, electrons in air molecules will be forcibly stripped off, forming a large number of free electrons and ions. These charged particles move at high speed under the action of electric field, forming a conductive channel, which in turn produces a high-temperature, luminous electric arc phenomenon. When the grounding plate 114 and the contact plate 116 are no longer in contact, the electric arc will be generated between the grounding plate 114 and the contact plate 116.

[0058] S400, Arc Extinguishing

[0059] This device can extinguish arcs, as follows:

[0060] As the sliding column 119 moves laterally, it generates a traction force on the control line 190 (see [link]). Figure 10 Subsequently, the control line 190 moves relative to the sliding column 119 in the direction and distance of movement, pulling one end of the contact plate 116 (the end away from the dividing plate 121) upward. At this time, the control line 190 controls the reset bead 192 to move towards the upper dividing plate 121, and by applying traction force to the control line 190, the contact plate 116 is controlled to bend upward and come into contact with the arc extinguishing component 2. Under the guidance of the guide plate 115 and / or the contact plate 116, the arc moves towards the arc extinguishing component 2, and when the arc enters... Once inside the metal grid 201, the arc is instantly divided by multiple metal grids 201 because there are six sets of metal grids 201. The metal grids 201 have high thermal conductivity, which can quickly conduct away the heat generated by the arc to achieve cooling. On the other hand, when the charged particles in the arc come into contact with the metal grids 201, the metal grids 201 absorb the energy of these charged particles and recombine them into neutral particles, i.e., the deionization process, which reduces the number of charged particles in the arc, weakens the energy of the arc, and ultimately achieves the purpose of extinguishing the arc.

[0061] It should be noted that when the sliding column 119 is not attracted by magnetic force, the third compression spring 122 is used to reset the sliding column 119. After the sliding column 119 returns to its initial position, the drive rod 125 forces the elastic plate 170 to rotate inside the dividing plate 121, and the left end of the elastic plate 170 moves away from the dispersing plate 124 and returns to its initial state. Then, under the action of the second reset spring 171, the dispersing plate 124 moves away from the metal grid 201, so the metal grid 201 is in its initial state (undivided state, i.e., the state in which they are close to each other by the action of the first compression spring). In the initial state, the third... The first return spring 204 is in a stretched state, meaning that the multiple sets of metal grid plates 201 are always tending to approach each other through the first return spring 204. The dispersion plate 124, together with multiple triangular protrusions 203, prevents two adjacent metal grid plates 201 from approaching each other, thus limiting the two adjacent metal grid plates 201. In addition, when the position of the sliding column 119 returns to the initial state, the control line 190 no longer has traction. Then, under the action of the return bead 192 and the third return spring 191, the contact plate 116 also returns to the initial state (no longer bending, and no longer in contact with the metal grid plates 201).

[0062] As the sliding column 119 slides laterally, the drive rod 125 on the sliding column 119 moves laterally along with the sliding column 119, causing the elastic plate 170 to rotate inside the dividing plate 121. During rotation, the other end of the elastic plate 170 gradually applies pressure to the top of the dispersing plate 124, forcing the dispersing plate 124 to move towards the metal grid 201. The triangular protrusions at the bottom of the dispersing plate 124 then compress multiple sets of metal grids 201, forming a division. Due to the triangular protrusions at the bottom of the dispersing plate 124... One triangular protrusion has an obtuse angle, while the rest of the triangular protrusions are set to acute angles. In this way, the dispersion plate 124 applies pressure to multiple sets of metal grids 201, dividing the multiple metal grids 201 into three large regions. As two adjacent metal grids 201 rapidly approach each other, the high-intensity electric arc is quickly divided into multiple short arcs. The electric field intensity of the arc column of the short arc is lower, and the energy required to maintain the arc combustion is also less. The total voltage drop after multiple short arcs are connected in series increases, making it difficult for the arc to maintain combustion under a lower power supply voltage, thereby achieving the effect of rapid arc extinguishing.

[0063] Features of this application:

[0064] S1. External power current is introduced through the first wire 102. The current is conducted to the electromagnetic coil 150 through the conductive plate 104, so that the electromagnetic coil 150 generates a stable magnetic field. Under the cooperation of this magnetic field and the elastic force of the third compression spring 122, the sliding column 119 remains relatively stationary in the inner diameter of the electromagnetic coil 150. The push rod 123 is pushed by the third compression spring 122 to maintain a specific contact relationship with the dividing plate 121, so that the current can be transmitted to the second wire 103 through the electromagnetic coil 150 and the conductive plate 104, thus achieving the effect of ensuring the safe and stable transmission of power within the protective shell 101 and solving the problem of stable power supply.

[0065] S2. During use, the length of the first compression spring 108 changes due to the external force caused by changes in the circuit state. When the spring 108 is stretched, it pulls the rectangular ring 107 to make the lever 106 rotate counterclockwise. The lever 106 drives the control plate 109 to rotate clockwise around the axis through the rectangular ring 107. At the same time, the rotation of the control plate 109 applies a force to the limit ring 111, so that the second compression spring 110 and the limit ring 111 work together to limit the rotation speed and angle of the control plate 109. This allows the circuit on / off control to be flexibly adjusted according to changes in circuit parameters, solving the problem that the circuit cannot be accurately controlled for on / off according to different working conditions.

[0066] S3. During normal operation, the electromagnetic coil 150 has a stable magnetic field, the sliding column 119 and the top rod 123 remain relatively stationary, and the contact plate 116 separates from the junction plate 114. When abnormalities such as circuit leakage occur, the change in the magnetic field of the electromagnetic coil 150 causes the sliding column 119 to move, which in turn drives the top rod 123 to contact the control plate 109. The control plate 109 rotates around the axis under force, causing the contact plate 116 to contact the junction plate 114. The current flows through the output end of the electromagnetic coil 150, the contact plate 116, the junction plate 114, the conveyor line 113, and the connecting plate 112 to the end of the second conductor 103. The second fixing sleeve limits the end of the second conductor 103, thereby enabling the circuit to be precisely controlled based on the principle of electromagnetic induction. This achieves rapid response to leakage and circuit cut-off, ensuring the safety of equipment and personnel, enhancing the stability of circuit connections, and solving the problems of untimely leakage protection and unstable conductor connections.

[0067] S4. During normal operation, the first compression spring 108 and the second compression spring 110 are in a neutral state, the lever 106 and the control board 109 are in a specific position, and the contact plate 114 is separated from the contact plate 116. When the circuit is abnormal, the state of the first compression spring 108 changes, causing the lever 106 and the control board 109 to rotate, which in turn changes the state of the second compression spring 110. The control board 109 rotates until the contact plate 114 contacts the contact plate 116. This allows the operator to visually judge the circuit status by observing the spring states, and the circuit can be turned on or off in a timely and accurate manner according to the actual situation. This achieves the effect of facilitating circuit maintenance and management, improving the practicality and reliability of the leakage current protection circuit breaker, and solving the problems of difficult circuit status judgment and untimely and inaccurate control.

[0068] S5. During use, when a circuit malfunction causes a change in the magnetic field of the electromagnetic coil 150, the sliding column 119 begins to move under the electromagnetic force generated by the changing magnetic field. The arc-shaped bracket 118 on one side of the limiting plate 117 fits tightly with the outer surface of the sliding column 119, restricting the sliding column 119 from moving along a specific arc trajectory. The top mounting plate 120 of the dividing plate 121 securely installs the dividing plate 121 inside the protective housing 101, providing a mounting base for components such as the sliding column 119. This allows the sliding column 119 to accurately respond to changes in electromagnetic force, converting the changes in electromagnetic force into mechanical displacement, thereby improving the reliability of the leakage protection device and solving the problem of unreliable leakage protection caused by inaccurate component operation.

[0069] For other details, please refer to the existing technology.

[0070] The above description is only a preferred embodiment of the present utility model. It should be noted that those skilled in the art can make several changes and improvements without departing from the overall concept of the present utility model, and these should also be considered within the protection scope of the present utility model.

Claims

1. A residual current circuit breaker, comprising a housing assembly (1), the housing assembly (1) including a protective housing (101), characterized in that: The upper part of the protective shell (101) is provided with a first wire (102), which extends from the upper part of the protective shell (101) to the outside. The first wire (102) is electrically connected to one end of the electromagnetic coil (150), and the other end of the electromagnetic coil (150) is connected to a contact plate (116). The bottom of the protective housing (101) is provided with a second conductor (103), which extends from the bottom of the protective housing (101) to the outside. The second conductor (103) is connected to a junction box (114) through a transmission line (113). An electromagnetic coil (150) is provided with a sliding post (119) that can slide along it. The sliding post (119) is made of magnetic material. One end of the top rod (123) is fixed at the end of the sliding post (119). A paddle (106) is provided on the outward extension line of the top rod (123). The paddle (106) is rotatably connected to the housing assembly (1). One end of the housing assembly (1) is hinged to a rectangular ring (107). The other end of the rectangular ring (107) is hinged to one end of the control plate (109). The other end of the control plate (109) is pressed against one end of the control plate (109). The middle part of the control plate (109) is rotatably connected to the housing assembly (1), so that the paddle (106), the rectangular ring (107), the control plate (109) and the housing assembly (1) form a four-bar linkage; A guide plate (115) is provided at the end of the power contact plate (114) away from the limit ring (111), and the side of the guide plate (115) away from the power contact plate (114) is attached to the inner wall of the protective shell (101). The guide plate (115) is made of an elastic material.

2. The residual current circuit breaker as described in claim 1, characterized in that: The protective shell (101) has a conductive plate (104) inside. A first fixing sleeve (105) is fixed on one side of the conductive plate (104). A first wire (102) is connected inside the first fixing sleeve (105). An electromagnetic coil (150) is connected to the outer surface of the conductive plate (104) by a wire. A dividing plate (121) is provided at one end of the electromagnetic coil (150). A limiting plate (117) is provided at the other end of the electromagnetic coil (150). The end of the top rod (123) away from the sliding column (119) passes through the limiting plate (117). A bracket (118) is fixed on the limiting plate (117). The side of the bracket (118) near the sliding column (119) is set as arc. The limiting plate (117) limits the sliding column (119) through the bracket (118).

3. The residual current circuit breaker as described in claim 2, characterized in that: A third compression spring (122) is provided on the outer surface of the push rod (123); A rectangular ring (107) is connected to one end of a first compression spring (108), and one end of the first compression spring (108) is connected to the other side of a limiting plate (117); A limiting ring (111) is movably provided at the bottom of the control board (109). One end of the limiting ring (111) is hinged to the power contact plate (114). The other end of the limiting ring (111) is a rod, and a second compression spring (110) is sleeved on the outer surface of the rod. The end of the second compression spring (110) away from the limiting ring (111) is connected to the bottom of the control board (109).

4. The residual current circuit breaker as described in claim 3, characterized in that: The protective housing (101) has a grounding plate (114) inside near the contact plate (116), and the grounding plate (114) is located below the contact plate (116). The bottom of the grounding plate (114) has a conveyor line (113), and one end of the conveyor line (113) near the grounding plate (114) is electrically connected to the grounding plate (114). The other end of the conveyor line (113) is electrically connected to the connecting plate (112). The connecting plate (112) is located at the bottom of the grounding plate (114). The connecting plate (112) is electrically connected to the second conductor (103), and the grounding plate (114) is fixedly installed inside the protective housing (101). The bottom of the connecting plate (112) has a second fixing sleeve, which is used to limit the end of the second conductor (103).

5. The residual current circuit breaker as described in claim 4, characterized in that: The protective housing (101) is provided with an arc extinguishing component (2), which is located inside the housing assembly (1).

6. The residual current circuit breaker as described in claim 5, characterized in that: The arc extinguishing assembly (2) includes multiple sets of metal grids (201). One side of the metal grid (201) is provided with a protrusion (203). The metal grid (201) is movably provided with a sliding plate (202) through the protrusion (203). One side of the sliding plate (202) is fixedly set on the inner wall of the protective shell (101). The other side of the sliding plate (202) is connected to the dividing plate (121). There are six sets of metal grids (201). Each set of metal grids (201) is slidably connected to the sliding plate (202) through the protrusion (203). The outer surface of each set of protrusions (203) is provided with the same first return spring (204). The material of each first return spring (204) is set to elastic material.

7. The residual current circuit breaker as described in claim 6, characterized in that: The bottom of the dividing plate (121) is provided with a contact plate (116). The end of the contact plate (116) away from the dividing plate (121) is connected to the control line (190). The outer surface of the control line (190) is fixedly provided with a reset bead (192). The side of the reset bead (192) facing the dividing plate (121) is provided with a third reset spring (191). The end of the third reset spring (191) away from the reset bead (192) is connected to the bottom of the dividing plate (121).

8. The residual current circuit breaker as described in claim 7, characterized in that: The top of the dividing plate (121) is provided with a mounting plate (120), the bottom of the mounting plate (120) is connected to the dispersing plate (124) through a second return spring (171), and the bottom of the dispersing plate (124) is provided with multiple triangular protrusions, and the mounting plate (120) is fixed inside the protective shell (101).

9. The residual current circuit breaker as described in claim 8, characterized in that: A control line (190) is provided on the outer surface of the sliding column (119) near the bracket (118), and the control line (190) runs longitudinally through the dividing plate (121). An elastic plate (170) is provided inside the dividing plate (121) for rotation, and a drive rod (125) is provided on the right side of the elastic plate (170). The bottom of the drive rod (125) is fixedly connected to the outer surface of the sliding column (119). A bracket (118) is provided on the side of the limiting plate (117) facing the sliding column (119), and the bracket (118) is in close contact with the outer surface of the sliding column (119).

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