A misoperation-proof plastic housing circuit breaker

Abstract

The application provides a plastic shell circuit breaker with mistaken operation prevention, and relates to the technical field of circuit breakers. The circuit breaker comprises a flame-retardant shell, a panel and an operating mechanism, the operating mechanism is installed in the flame-retardant shell, and further comprises a toggle lever, a support frame, an operating slider, a pressing key, an elastic member, a locking assembly and an arc-shaped piece. The toggle lever cooperates with the operating mechanism and is used for controlling the on-off of a circuit. The middle part of the support frame is connected with a magnetic block. The lower end of the operating slider can abut against the operating mechanism. The pressing keys are symmetrically installed on the two sides of the toggle lever. One end of the elastic member is connected with the pressing keys, and the other end is connected with the operating slider. The locking assembly is arranged between the two pressing keys and is used for locking the distance between the two pressing keys. The arc-shaped piece is arranged in the toggle lever, one end of the arc-shaped piece is fixedly connected with an inclined table, and the inclined table is used for pushing the operating slider to slide towards the operating mechanism. The above components are arranged to achieve the mistaken touch prevention function and improve the safety of the circuit breaker.

Description

Technical Field

[0001] This invention relates to the field of circuit breaker technology, and more particularly to a plastic-cased circuit breaker designed to prevent misoperation. Background Technology

[0002] In low-voltage power distribution systems, molded case circuit breakers are widely used for overload and short-circuit protection of lines. The reliability and safety of their operating mechanisms directly affect equipment operation and personal safety. In existing circuit breakers, the operating mechanism controls circuit on / off via a lever located within the panel; users can directly operate the circuit by moving the lever.

[0003] However, in practical use, the operating lever is easily accidentally touched and misoperated, leading to unexpected circuit connection or disconnection, thus affecting the stability of the electrical system. Simultaneously, due to the lack of effective mechanical locking or anti-misoperation structures, the operating mechanism cannot be reliably locked under specific operating conditions, posing a significant safety hazard. Although some existing technologies have simple anti-misoperation mechanisms, they lack adaptable switchable mechanical anti-misoperation locking functions, and their simple anti-misoperation control functions are limited and cannot be adjusted as needed, failing to support adaptable switching based on operating conditions. Conventional anti-misoperation structures are mostly fixed in mode, unable to flexibly enable or disable the anti-misoperation function according to actual operation and maintenance needs, and cannot automatically release the anti-misoperation restriction when the operator manually disconnects the power, resulting in poor adaptability and practicality.

[0004] Therefore, there is a need for a plastic-cased circuit breaker that can overcome the above-mentioned defects and prevent misoperation. Summary of the Invention

[0005] The purpose of this invention is to provide a plastic-cased circuit breaker that prevents misoperation, in order to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a plastic-cased circuit breaker with anti-misoperation features, comprising a flame-retardant casing, a panel, and an operating mechanism. The panel is installed on one side of the flame-retardant casing, and the operating mechanism is installed inside the flame-retardant casing. The circuit breaker also includes a toggle lever, which is disposed inside the panel and works in conjunction with the operating mechanism to control the on / off state of the circuit. The support frame is fixedly connected inside the lever, and a magnetic block is fixedly connected in the middle. The magnetic block attracts the operating mechanism and keeps the middle of the support frame in contact with the operating mechanism. The operating slider is slidably mounted in the middle of the support frame, and its lower end can abut against the operating mechanism; The push button is symmetrically slidably mounted on both sides of the lever and is located on the side of the panel away from the flame-retardant housing; The elastic element has one end fixedly connected to the corresponding pressing button and the other end fixedly connected to the operating slider; A locking component, located between two pressing buttons, is used to lock the distance between the two pressing buttons and control the sliding distance of the operating slider relative to the support frame; The arc-shaped component is slidably disposed inside the lever and is positioned in a U-shape on both sides of the support frame. An inclined platform is fixedly connected to the end of the arc-shaped component near the operating slider, which is used to push the operating slider to slide towards the operating mechanism.

[0007] Preferably, the operating mechanism includes: an operating lever, which is used to trigger the circuit switching of the operating mechanism; The control lever is in contact with the magnetic block; The operating slider can slide to one side of the operating mechanism and then abut against the operating lever.

[0008] Preferably, the locking assembly includes: a fixed cylinder, which is fixedly connected to one side of any pressing key and placed inside the toggle lever; An annular spring is fixedly connected to the end of a fixed cylinder, and has multiple notches in the middle. A fixed rod is fixedly connected to one side of another pressing key and is coaxial with the fixed cylinder. A snap ring is fixedly connected to the side of the fixed rod close to the fixed cylinder. The snap ring can pass over the annular spring and be placed inside the fixed cylinder. The unlocking ring has a sliding sleeve on the outside of the fixed rod; The support sleeve is fitted onto the outside of the fixing rod, and a permanent magnet is provided on the side near the unlocking ring.

[0009] Preferably, a buffer groove is provided on one side of the snap ring, and the side of the unlocking ring corresponding to the buffer groove can slide into the buffer groove; The permanent magnet attracts the unlocking ring, allowing it to remain in contact with the end of the support sleeve.

[0010] Preferably, it further includes: an elastic segment, which is fixedly connected to the end of the arc-shaped member away from the inclined platform; The reset boss is fixedly connected to the middle of the arc-shaped part, and the end of the operating slider is placed between the reset boss and the inclined platform to pull the arc-shaped part to reset.

[0011] Preferably, a limiting groove is provided in the panel at the position corresponding to the elastic segment.

[0012] Preferably, it further includes: a limiting platform, which is fixedly connected inside the actuating rod and is located on the side away from the arc-shaped part; The limiting platform can push the arc-shaped component to make the elastic segment slide out of the limiting groove.

[0013] Preferably, the operating slider has a push shaft in the middle; The inclined platform pushes the operating slider to slide towards the side of the operating mechanism by pushing the shaft, and makes the operating slider contact the operating lever.

[0014] Preferably, after the operating lever separates from the magnetic block, the magnetic block can be influenced by magnetic force to re-contact the operating lever.

[0015] Preferably, it further includes: a status indicator, which is fixedly connected to the middle of the lever, and two are symmetrically arranged; Different status indicators for different angles of the lever are located inside the panel.

[0016] This invention provides a plastic-cased circuit breaker designed to prevent misoperation, which has at least the following advantages: 1. This invention effectively prevents accidental activation by setting up a toggle lever, a magnetic block, and an operating slider. During use, the magnetic block is in contact with the operating lever, and the operating slider is in a retracted state and not in contact with the operating mechanism. At this time, even if the toggle lever is accidentally moved by an external force, the toggle lever itself can swing freely without triggering the operating mechanism. After the external force disappears, the magnetic block attracts the operating lever again to reset the toggle lever.

[0017] 2. This invention, by incorporating a press button, an elastic element, and a locking assembly, adds the ability to select whether to enable or disable the anti-accidental touch function based on actual needs. When using the invention, to disable the anti-accidental touch function, manually press the press buttons on both sides to allow the locking ring to pass over the annular spring and enter the fixed cylinder. At this time, the press buttons on both sides are in a close position, and the elastic element causes the operating slider to slide towards the operating mechanism, placing the operating lever between the operating slider and the magnetic block. When the anti-accidental touch function needs to be enabled, press the press buttons on both sides again to allow the unlocking ring to pass over the annular spring and enter the fixed cylinder. Then release the press buttons. Under the push of the return spring, the press buttons on both sides move away from each other, and the inclined surface of the unlocking ring's end face pushes the annular spring to deform, causing the unlocking ring and locking ring to slide out of the fixed cylinder. The elastic element then causes the operating slider to move away from the operating mechanism and disengage from the operating lever, at which point the anti-accidental touch function is enabled.

[0018] 3. This invention achieves the purpose of disabling the anti-accidental touch function when the circuit is actively disconnected by setting a limiting groove, a reset boss and an arc-shaped component. When the circuit breaker is actively disconnected, the operating rod pushes the toggle lever to flip. During the initial flip, the inclined platform pushes the operating slider to slide to one side of the operating rod, so that the operating rod is placed between the operating slider and the magnetic block. The toggle lever continues to flip so that the elastic section slides out of the limiting groove. The toggle lever is pushed by the operating rod to flip to the downward position. At this time, the toggle lever can be manually pulled to make the operating mechanism reach the ready-to-close state without pressing the button. Attached Figure Description

[0019] Figure 1 This is a schematic diagram illustrating the usage state of the present invention.

[0020] Figure 2 This is a schematic diagram showing the disassembled state of the panel and the flame-retardant outer shell in this invention.

[0021] Figure 3 This is a cross-sectional view of the panel in this invention.

[0022] Figure 4 This is a schematic diagram of the internal state of the panel when the circuit of the present invention is turned on.

[0023] Figure 5 This is a schematic diagram of the internal state of the panel when the circuit is about to be closed according to the present invention.

[0024] Figure 6 For the present invention Figure 5 A magnified view of a portion of region A in the middle.

[0025] Figure 7 This is a schematic diagram of the internal structure of the lever in this invention.

[0026] Figure 8 This is a schematic diagram of the arc-shaped component in this invention.

[0027] Figure 9 This is a schematic diagram illustrating the cooperation relationship between the arc-shaped component and the actuating lever in this invention.

[0028] Figure 10 This is a schematic diagram showing the anti-accidental touch function of the present invention in the enabled state.

[0029] Figure 11 For the present invention Figure 10 A magnified view of a portion of region B in the middle.

[0030] Figure 12 This is a schematic diagram of the anti-accidental touch function of the present invention in the off state.

[0031] In the picture: 1. Flame-retardant outer shell; 2. Panel; 21. Limiting groove; 3. Operating mechanism; 31. Operating lever; 4. Toggle lever; 41. Limiting platform; 5. Support frame; 6. Magnetic block; 7. Operating slider; 71. Push shaft; 8. Press button; 9. Elastic element; 10. Locking assembly; 101. Fixed cylinder; 102. Annular spring; 103. Fixed rod; 104. Snap ring; 1041. Buffer groove; 105. Unlocking ring; 106. Support sleeve; 107. Permanent magnet; 108. Return spring; 11. Arc-shaped element; 111. Inclined platform; 112. Elastic segment; 113. Return boss; 12. Status indicator. Detailed Implementation

[0032] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] This invention provides, for example Figures 1 to 12 The circuit breaker with a plastic housing designed to prevent misoperation includes a flame-retardant housing 1, a panel 2, and an operating mechanism 3. The panel 2 is installed on one side of the flame-retardant housing 1, and the operating mechanism 3 is installed inside the flame-retardant housing 1. Multiple input and output terminals are fixedly installed on the upper and lower sides of the flame-retardant housing 1 for connecting input and output cables. The circuit breaker also includes: a toggle lever 4, rotatably mounted inside the panel 2, which works in conjunction with the operating mechanism 3 to control the circuit's on / off state; a support frame 5, fixedly connected inside the toggle lever 4, with a magnetic block 6 fixedly connected to its center. The magnetic block 6 attracts the operating mechanism 3, and the magnetic attraction of the magnetic block 6 keeps the center of the support frame 5 in contact with the operating mechanism 3, thus allowing the toggle lever 4 to contact the operating mechanism 3 and enabling external observation of the circuit breaker's on / off state; and an operating slider 7, slidably mounted in the center of the support frame 5. The lever 4 is symmetrically slidably mounted on both sides of the lever 4 and placed on the side of the panel 2 away from the flame-retardant housing 1 for manual operation by the user; the elastic element 9 is fixedly connected at one end to the corresponding button 8 and at the other end to the operating slider 7, for transmitting force between the button 8 and the operating slider 7; the locking component 10 is disposed between the two buttons 8 for locking the distance between the two buttons 8, thereby controlling the sliding distance of the operating slider 7 relative to the support frame 5; the arc-shaped element 11 is slidably disposed inside the lever 4 and is placed in a U-shape on both sides of the support frame 5, with a ramp 111 fixedly connected at the end of the arc-shaped element 11 near the operating slider 7, the ramp 111 being used to push the operating slider 7 to slide toward the operating mechanism 3.

[0034] During use, since the elastic element 9 is not compressed by the pressing key 8, the operating slider 7 is in the retracted state and does not contact the operating mechanism 3. At this time, even if the toggle lever 4 is accidentally moved by external force, the toggle lever 4 itself can swing freely without being triggered, and the operating mechanism 3 will not be activated.

[0035] When it is necessary to manually shut off the circuit breaker, the operator simultaneously and symmetrically presses the two buttons 8, and the force is transmitted to the operating slider 7 through the elastic element 9, causing it to slide towards the side of the operating mechanism 3 and make contact with the operating mechanism 3. Then, the operator pulls the lever 4 to trigger the operating mechanism 3 and disconnect the circuit connection.

[0036] When closing the circuit is required, manually press the button 8 and pull down the lever 4 to bring the operating mechanism 3 to the ready-to-close state. Then push the lever 4 upward, and the magnetic block 6 will push the operating mechanism 3 to slide upward to complete the closing operation.

[0037] Specifically, the operating mechanism 3 includes: an operating lever 31, which is used to trigger the circuit switching of the operating mechanism 3. The operating lever 31 directly triggers the contact system inside the operating mechanism 3 to realize the circuit switching; the operating lever 31 is attached to the magnetic block 6 and is kept in contact by magnetic attraction; the operating slider 7 can slide to one side of the operating mechanism 3 and then abut against the operating lever 31.

[0038] When the operating slider 7 is not pushed down by the pressed button 8, even if the lever 4 rotates, the operating slider 7 will only pass over the operating lever 31 and cannot exert any substantial force on it, thus ensuring the reliability of the idle stroke. When the operating slider 7 is pressed down and abuts against the operating lever 31, the support frame 5, the operating slider 7, and the operating lever 31 form a rigid force transmission chain, ensuring the rigid linkage between the lever 4 and the operating mechanism 3, so that the transmission of operating force is without delay or play, improving the operating feel and reliability.

[0039] More specifically, the locking assembly 10 includes: a fixed cylinder 101, which is fixedly connected to one side of any of the pressing keys 8 and placed inside the toggle lever 4; an annular spring 102, which is fixedly connected to the end of the fixed cylinder 101 and has multiple notches in the middle to form a ring of elastic claw structure; a fixed rod 103, which is fixedly connected to one side of another oppositely arranged pressing key 8 and is coaxial with the fixed cylinder 101, and a snap ring 104 is fixedly connected to the side of the fixed rod 103 near the fixed cylinder 101, the snap ring 104 can pass over the annular spring 102 and be placed inside the fixed cylinder 101; an unlocking ring 105, which is slidably fitted on the outside of the fixed rod 103 and can move along the axial direction of the fixed rod 103; and a support sleeve 106, which is fitted on the outside of the fixed rod 103 and has a permanent magnet 107 on the side near the unlocking ring 105.

[0040] When the anti-accidental touch function needs to be deactivated, manually press the two buttons 8 close to each other. The fixing rod 103 drives the locking ring 104 to insert into the fixing cylinder 101. The outer edge of the locking ring 104 presses the annular spring 102, causing it to expand elastically. When the locking ring 104 completely passes the annular spring 102, the annular spring 102 springs back to its original position, locking the locking ring 104 inside the fixing cylinder 101, thus locking the relative position of the two buttons 8. At this time, the two buttons 8 are in a position close to each other. The buttons 8 push the operating slider 7 to contact the operating rod 31 through the elastic element 9. At this time, it is not necessary to press the two buttons 8. Pulling down the operating rod 31 can also disconnect the circuit of the operating mechanism 3.

[0041] When the anti-accidental touch function needs to be restored, an external force is applied to bring the two pressing buttons 8 closer together, causing one side of the unlocking ring 105 to push the annular spring 102 to deform and the unlocking ring 105 to enter the fixed cylinder 101. Then, the pressure on the pressing buttons 8 is released, and the elastic element 9 generates a pushing force to push back to both sides, so that the annular spring 102 and the side of the unlocking ring 105 away from the locking ring 104 come into contact. The restoring force of the elastic element 9 pushes the pressing buttons 8 on both sides away from each other, causing the annular spring 102 to deform. Then, the unlocking ring 105 and the locking ring 104 slide out of the fixed cylinder 101, and the pressing buttons 8 on both sides return to their initial positions. At this time, the operating slider 7 slides away from the operating mechanism 3, so that its end does not come into contact with the operating lever 31.

[0042] It should be noted that a reset spring 108 is provided between the two pressing keys 8, which is sleeved on the outside of the fixed cylinder 101 and the support sleeve 106, and is used to apply a pushing force that moves away from each other to the two pressing keys 8.

[0043] Specifically, a buffer groove 1041 is provided on one side of the snap ring 104, and the side of the unlocking ring 105 corresponding to the buffer groove 1041 can slide into the buffer groove 1041; the permanent magnet 107 attracts the unlocking ring 105, so that it can keep in contact with the end of the support sleeve 106.

[0044] When unlocking, the unlocking ring 105 is pushed into the buffer groove 1041, and the annular spring 102 passes over the unlocking ring 105. When the two pressing buttons 8 move away from each other, the unlocking ring 105 is released from the attraction of the permanent magnet 107 and one side enters the locking ring 104. Then, under the guidance and push of the inclined surface on one side of the unlocking ring 105, the annular spring 102 expands, so that the unlocking ring 105 and the locking ring 104 are separated from the fixed cylinder 101.

[0045] More specifically, it also includes: an elastic segment 112, which is fixedly connected to the end of the arc-shaped member 11 away from the inclined platform 111, and is bent; a reset boss 113, which is fixedly connected to the middle of the arc-shaped member 11, and the end of the operating slider 7 is placed between the reset boss 113 and the inclined platform 111 for pulling the arc-shaped member 11 to reset.

[0046] Specifically, a limiting groove 21 is provided in the panel 2 at the position corresponding to the elastic segment 112.

[0047] During operation, when the circuit breaker is actively disconnected, the operating lever 31 pushes the toggle lever 4 downward through the magnetic block 6. Initially, the elastic segment 112 at the end of the arc-shaped component 11 is placed in the limiting groove 21, and the arc-shaped component 11 will not rotate. At this time, under the reaction force of the arc-shaped component 11, the arc-shaped component 11 is subjected to the downward rotating pressure of the toggle lever 4, and the pushing shaft 71 squeezes the inclined platform 111, causing it to slide towards the side of the operating lever 31 until the operating slider 7 contacts the operating lever 31. At this time, the operating lever 31 is placed between the operating slider 7 and the magnetic block 6. As the toggle lever 4 continues to rotate, the elastic segment 112 slides out of the limiting groove 21. At this time, the toggle lever 4 is pushed and rotated to a lower position by the operating lever 31.

[0048] When closing is required, the toggle lever 4 can be pulled down manually without pressing the button 8 to bring the operating mechanism 3 to the closing state. Then, the toggle lever 4 is pushed up to complete the closing, making the circuit breaker circuit conductive. At the same time, the push shaft 71 slides along the inclined platform 111 and returns to the side away from the operating lever 31. Then, the push shaft 71 pushes the reset boss 113 and drives the arc-shaped part 11 to flip upward synchronously until the elastic section 112 enters the limit groove 21, preparing for the next circuit disconnection.

[0049] More specifically, it also includes: a limiting platform 41, which is fixedly connected inside the actuating rod 4 and is located on the side away from the arc-shaped member 11; the limiting platform 41 can push the arc-shaped member 11 to make the elastic segment 112 slide out of the limiting groove 21.

[0050] In the initial state, when the lever 4 is in the state of the operating mechanism 3 conducting circuit, the limiting platform 41 does not contact the arc-shaped component 11. After the lever 4 has rotated a certain distance, the limiting platform 41 will push the arc-shaped component 11 from one side, forcing the arc-shaped component 11 to displace, thereby causing the elastic segment 112 to slide out of the limiting groove 21 on the panel 2.

[0051] Specifically, the operating slider 7 has a cylindrical push shaft 71 in the middle; the inclined platform 111 pushes the operating slider 7 to slide towards the side close to the operating mechanism 3 through the push shaft 71, and makes the operating slider 7 contact the operating rod 31.

[0052] During operation, the inclined platform 111 on the arc-shaped component 11 pushes the push shaft 71 to push the operating slider 7 to slide towards the operating mechanism 3, and finally makes the operating slider 7 firmly contact the operating rod 31.

[0053] More specifically, after the operating lever 31 separates from the magnetic block 6, the magnetic block 6 can re-engage with the operating lever 31 due to magnetic force. When the circuit breaker operates normally, the operating lever 31 moves with the operating mechanism 3. After the external force disappears, the operating lever 31 and the magnetic block 6 may temporarily separate. However, due to the strong magnetic attraction of the magnetic block 6, once the operating lever 31 returns to the vicinity of the position corresponding to the magnetic block 6, the magnetic block 6 will attract the operating lever 31 back into place, causing the two to re-adhere.

[0054] Specifically, it also includes: a status indicator 12, which is fixedly connected to the middle of the lever 4, and two are symmetrically arranged; different status indicators 12 are placed inside the panel 2 when the lever 4 is at different angles. When the lever 4 is at different rotation angles, the different status indicators 12 will be aligned with the transparent window on the panel 2, so as to clearly display the current working status on the outside of the circuit breaker.

[0055] In summary, during use, first select whether the anti-accidental touch function is needed based on requirements. If the anti-accidental touch function is not needed, manually press the button 8 to make the two buttons 8 on both sides move towards each other, compressing the elastic element 9. Since the other end of the elastic element 9 is connected to the operating slider 7, the operating slider 7 receives a downward component force and begins to slide towards the operating mechanism 3 until its lower end abuts against the operating rod 31, and the locking ring 104 passes over the annular spring 102 and enters the fixed cylinder 101. At this time, the operating slider 7 remains in contact with the operating rod 31, and the anti-accidental touch function is currently disabled. This is suitable for circuit breakers installed in locations where accidental touch will not occur, such as high places or in distribution boxes with separate protection.

[0056] Based on the above, when the anti-accidental touch function needs to be activated, by pressing the two pressing buttons 8 deeply again, the unlocking ring 105 passes over the annular spring 102 and enters the fixed cylinder 101. At this time, the reset spring 108 pushes the two pressing buttons 8 away from each other and resets. The elastic element 9 pulls the operating slider 7 away from the operating lever 31, so that the operating slider 7 is disengaged from the operating lever 31.

[0057] When the locking ring 104 is not placed inside the fixed cylinder 101, the circuit breaker has an anti-accidental contact function. At this time, the operating slider 7 is not in contact with the operating lever 31. When an external force moves the lever 4, the lever 4 itself can swing freely, and the operating mechanism 3 will not be triggered. At the same time, due to the setting of the magnetic block 6, when the external force that triggers the lever 4 to flip disappears, the magnetic block 6 attracts the end of the operating lever 31, causing the magnetic block 6 to flip back to the state of contact with the operating lever 31. When the circuit breaker needs to be disconnected in the anti-accidental contact state, press the two pressing keys 8 symmetrically at the same time. The force is transmitted to the operating slider 7 through the elastic element 9, causing it to slide towards the side close to the operating mechanism 3 and contact the operating lever 31. Then, pull the lever 4 to trigger the operating mechanism 3 and disconnect the circuit connection. Similarly, when closing, press the pressing keys 8 on both sides at the same time and pull the lever 4 down to make the operating mechanism 3 reach the ready-to-close state. Then, manually push the lever 4 up to make the circuit conduct.

[0058] When the circuit breaker experiences a short circuit or overload, it will actively disconnect the circuit connection. At this time, the operating lever 31 pushes the toggle lever 4 to flip via the magnetic block 6. Initially, the elastic segment 112 at the end of the arc-shaped component 11 is placed in the limiting groove 21, fixing the arc-shaped component 11 relative to the panel 2. At this time, the push shaft 71 slides along the inclined platform 111 and pushes the operating slider 7 to slide towards the operating lever 31, so that the operating slider 7 contacts the operating lever 31, and the operating lever 31 is placed between the operating slider 7 and the magnetic block 6. As the toggle lever 4 continues to flip, the limiting platform 41 abuts against the end of the arc-shaped component 11, causing the elastic segment 112 to slide out of the limiting groove 21. Subsequently, the toggle lever 4 is pushed by the operating lever 31 to flip to a lower position.

[0059] When closing the circuit, pull the lever 4 downwards to bring the operating mechanism 3 to the closing position. Then push the lever 4 upwards. During the upward push of the lever 4, the push shaft 71 slides along the inclined platform 111 and restores the operating slider 7 to the side away from the operating lever 31. Then the push shaft 71 pushes the reset boss 113 and drives the arc-shaped part 11 to flip upwards synchronously until the elastic section 112 enters the limit groove 21 and the position of the arc-shaped part 11 is fixed, preparing for the next circuit disconnection. Continue to push the lever 4 upwards to push the operating lever 31 through the magnetic block 6, so that the operating mechanism 3 completes the closing and the circuit breaker circuit is turned on.

[0060] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A circuit breaker with a plastic housing to prevent misoperation, comprising a flame-retardant housing (1), a panel (2), and an operating mechanism (3), wherein the panel (2) is installed on one side of the flame-retardant housing (1), and the operating mechanism (3) is installed inside the flame-retardant housing (1), characterized in that, Also includes: The lever (4) is located inside the panel (2) and works in conjunction with the operating mechanism (3) to control the circuit on and off. The support frame (5) is fixedly connected inside the lever (4), and a magnetic block (6) is fixedly connected in the middle. The magnetic block (6) attracts the operating mechanism (3) and keeps the middle of the support frame (5) in contact with the operating mechanism (3). The operating slider (7) is slidably mounted in the middle of the support frame (5), and its lower end can abut against the operating mechanism (3); The press key (8) is symmetrically slidably installed on both sides of the toggle lever (4) and placed on the side of the panel (2) away from the flame-retardant shell (1); The elastic element (9) has one end fixedly connected to the corresponding pressing key (8) and the other end fixedly connected to the operating slider (7); A locking component (10) is provided between two pressing keys (8) to lock the distance between the two pressing keys (8) and control the sliding distance of the operating slider (7) relative to the support frame (5); The arc-shaped component (11) is slidably disposed inside the lever (4) and is placed in a U-shape on both sides of the support frame (5). The end of the arc-shaped component (11) near the operating slider (7) is fixedly connected to a ramp (111) for pushing the operating slider (7) to slide towards the operating mechanism (3).

2. The anti-misoperation plastic-cased circuit breaker according to claim 1, characterized in that, The operating mechanism (3) includes: an operating lever (31) for triggering the circuit switching of the operating mechanism (3); The operating lever (31) is in contact with the magnetic block (6); The operating slider (7) can slide to the side of the operating mechanism (3) and then come into contact with the operating lever (31).

3. The anti-misoperation plastic-cased circuit breaker according to claim 1, characterized in that, The locking assembly (10) includes: a fixed cylinder (101) which is fixedly connected to one side of any pressing key (8) and placed inside the toggle lever (4); An annular spring (102) is fixedly connected to the end of the fixed cylinder (101) and has multiple notches in the middle; A fixing rod (103) is fixedly connected to one side of another pressing key (8) and coaxial with the fixing cylinder (101). A snap ring (104) is fixedly connected to the side of the fixing rod (103) close to the fixing cylinder (101). The snap ring (104) can pass over the annular spring (102) and be placed inside the fixing cylinder (101). The unlocking ring (105) is slidably fitted on the outside of the fixing rod (103); The support sleeve (106) is fitted on the outside of the fixing rod (103) and has a permanent magnet (107) on the side near the unlocking ring (105).

4. A plastic-cased circuit breaker with anti-misoperation features according to claim 3, characterized in that, A buffer groove (1041) is provided on one side of the snap ring (104), and the side of the unlocking ring (105) corresponding to the buffer groove (1041) can slide into the buffer groove (1041). The permanent magnet (107) attracts the unlocking ring (105), enabling it to remain in contact with the end of the support sleeve (106).

5. A circuit breaker with a plastic housing for preventing misoperation according to claim 2, characterized in that, Also includes: The elastic segment (112) is fixedly connected to the end of the arc-shaped member (11) away from the inclined platform (111); The reset boss (113) is fixedly connected to the middle of the arc-shaped part (11). The end of the operating slider (7) is placed between the reset boss (113) and the inclined platform (111) to pull the arc-shaped part (11) to reset.

6. A plastic-cased circuit breaker with anti-misoperation features according to claim 5, characterized in that, A limiting groove (21) is provided at the position corresponding to the elastic segment (112) inside the panel (2).

7. A plastic-cased circuit breaker with anti-misoperation features according to claim 6, characterized in that, Also includes: The limiting platform (41) is fixedly connected inside the lever (4) and is located on the side away from the arc-shaped part (11); The limiting stage (41) can push the arc-shaped part (11) to make the elastic segment (112) slide out of the limiting groove (21).

8. A plastic-cased circuit breaker with anti-misoperation features according to claim 2, characterized in that, The operating slider (7) is provided with a push shaft (71) in the middle. The ramp (111) pushes the operating slider (7) to slide towards the side of the operating mechanism (3) via the push shaft (71), and makes the operating slider (7) contact the operating lever (31).

9. A plastic-cased circuit breaker with anti-misoperation features according to claim 2, characterized in that, After the operating lever (31) separates from the magnetic block (6), the magnetic block (6) can be affected by the magnetic force and come into contact with the operating lever (31) again.

10. A plastic-cased circuit breaker with anti-misoperation features according to claim 1, characterized in that, Also includes: The status indicator (12) is fixedly connected to the middle of the lever (4), and two are provided symmetrically. The indicator (12) for different states of the lever (4) at different angles is placed inside the panel (2).

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