Externally-hung accessory applied to circuit breaker, intelligent circuit breaker and method

Abstract

The invention discloses an external accessory applied to a circuit breaker, an intelligent circuit breaker and a method, and belongs to the technical field of circuit breakers. A plug-in accessory applied to a circuit breaker comprises an accessory body connected with a circuit breaker body in an inserted mode, the accessory body comprises a base plate, the base plate movably abuts against the circuit breaker body, and a connecting block is fixedly arranged on the base plate; the circuit base is arranged in the connecting block in a sliding manner, a plurality of contact pins electrically connected with the circuit breaker body are arranged on the circuit base, and a damping spring is arranged between the circuit base and the connecting block; and a positioning mechanism. Through cooperation of the positioning mechanism and the linkage cleaning assembly, stable and reliable self-adaptive locking can be achieved at the moment when the plug-in accessory is connected with the circuit breaker in an inserted mode, automatic cleaning of the interface can be completed in a linkage mode, and therefore the connection reliability and safety of an intelligent circuit breaker system are comprehensively improved, and the service life of the intelligent circuit breaker system is comprehensively prolonged.

Description

Technical Field

[0001] This invention relates to the field of circuit breaker technology, and in particular to an external accessory for circuit breakers, a smart circuit breaker, and a method thereof. Background Technology

[0002] A circuit breaker is a switching device capable of closing, carrying, and interrupting current under normal circuit conditions, and capable of closing, carrying, and interrupting current under abnormal circuit conditions within a specified time. Currently, to further enhance the functionality of circuit breakers, accessories are often added, which enable various protective characteristics required by the circuit breaker to be achieved.

[0003] These external accessories mostly use plug-in connections with the circuit breaker body, that is, electrical connection is achieved by the male pins on the accessory mating with the female sockets on the circuit breaker body. However, existing plug-in connection schemes have several technical problems that urgently need to be solved. First, the mechanical stability of the connection is insufficient. Common clip or screw fixing methods are prone to loosening under long-term vibration or temperature changes, resulting in poor contact between the pins and sockets, increased contact resistance, and thus the risk of local overheating, arcing, or even power outage, seriously affecting the reliability of power supply. Second, the installation fault tolerance is poor. Due to manufacturing tolerances and wear, the dimensions of the mounting slots on the circuit breaker body may have slight differences, and traditional rigid locking mechanisms cannot adaptively compensate for these tolerances, resulting in some accessories having loose parts after installation, failing to achieve uniform and tight locking. Third, the dustproof and cleaning capabilities are lacking. The plug interfaces exposed to the air are prone to accumulating dust and impurities. If they are not cleaned before plugging, they will directly affect the conductivity, and currently there is a lack of a mechanism for automatically and effectively cleaning the interfaces during the connection process. Summary of the Invention

[0004] The purpose of this invention is to solve the problems existing in the prior art, and to propose an external accessory for circuit breakers, a smart circuit breaker, and a method thereof.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: An external accessory for a circuit breaker includes an accessory body that plugs into the circuit breaker body, the accessory body comprising: A base plate, which movably abuts against the circuit breaker body, and a connecting block is fixedly provided on the base plate; A circuit base is slidably disposed within a connecting block. The circuit base is provided with a plurality of pins electrically connected to the circuit breaker body. A shock-absorbing spring is provided between the circuit base and the connecting block. And a positioning mechanism, the positioning mechanism including a second positioning component disposed in the connecting block and driven by the circuit base and a first positioning component disposed on the circuit base for locking the circuit base and the connecting block, the second positioning component being used to lock the accessory body and the circuit breaker body; The connecting block also includes a linkage cleaning component for assisting the insertion of the pins into the circuit breaker body.

[0006] Preferably, the first positioning component includes a movable groove formed on the circuit base, a first positioning block slidably connected in the movable groove, and a first elastic element disposed between the first positioning block and the inner wall of the movable groove, wherein the substrate is provided with a first positioning groove that cooperates with the first positioning block. The top of the first positioning block away from the first elastic element has a pressing slope, and the end of the first positioning block near the first elastic element passes through the bottom of the circuit base and is connected to a push plate.

[0007] Preferably, the second positioning component includes a receiving groove formed in the connecting block, a fixing rod fixed in the receiving groove, a second positioning block slidably connected between the receiving groove and the fixing rod, and a connecting rod hinged between the second positioning block and the circuit base.

[0008] Preferably, the second positioning block includes a sleeve slidably connected to the outside of the fixed rod, a fixed seat fixedly mounted on the sleeve, a housing fixedly connected to the fixed seat, a movable seat slidably connected to the housing and hinged to the connecting rod, a second elastic element disposed between the housing and the movable seat, a first connecting rod circumferentially hinged to the fixed seat, a second connecting rod circumferentially hinged to the movable seat, and an anti-loosening plate disposed between the first connecting rod and the second connecting rod. The anti-loosening plate is provided with an anti-slip pad and is slidably connected to the housing.

[0009] Preferably, the anti-loosening plate has a groove, a slider is slidably connected in the groove, a third elastic element is provided between the slider and the inner wall of the groove, and the end of the second connecting rod away from the moving seat is movably connected to the slider.

[0010] Preferably, the connecting block has a cavity for accommodating the pin, the top of the cavity is provided with a sealing film, and the center of the sealing film has a closing slit.

[0011] Preferably, the linkage cleaning component includes a pneumatic groove formed on the connecting block, a cover plate disposed on the top of the pneumatic groove, a partition plate fixed on the cover plate, a piston plate slidably connected between the partition plate and the inner wall of the pneumatic groove, a fourth elastic element disposed between the piston plate and the inner wall of the pneumatic groove, and a pusher disposed on the circuit base and moving against the piston plate. The partition divides the pneumatic slot into an outer cavity and an inner cavity. The bottoms of the outer cavity and the inner cavity are interconnected. The piston plate is slidably connected in the inner cavity. The cover plate has a feed chute at the outer cavity.

[0012] Preferably, the pusher includes a push rod fixedly connected to the circuit base and a conical block disposed at the end of the push rod, and the piston plate is provided with a concave hole that cooperates with the conical block.

[0013] A smart circuit breaker includes an external accessory for the circuit breaker and a circuit breaker body as described above. The outer side of the circuit breaker body is provided with a mounting groove for placing a connecting block and a circuit socket. The inner wall of the mounting groove is provided with a second positioning groove that cooperates with a second positioning block. A socket electrically connected to a pin is also fixed in the mounting groove.

[0014] This invention also discloses a method for using a smart circuit breaker, comprising the following steps: S1: Align the connecting block and circuit socket of the accessory body with the mounting slot of the circuit breaker body and insert them until the base plate contacts the housing of the circuit breaker body. At this time, the pin has not yet been inserted into the socket and the second positioning block has not entered the second positioning slot. S2: By pushing the circuit seat, the circuit seat drives the conical block of the pusher to move. The conical block inserts into the concave hole of the piston plate and forms a seal. Continue to push the piston plate to compress the fourth elastic element. The piston plate moves upward, causing the cavity of the pneumatic groove to generate negative pressure. This negative pressure acts on the pin and socket area through the feed groove, sucking away the light dust on the surface. S3: When the circuit base moves, the pressing slope on the first positioning block contacts the edge of the first positioning groove on the substrate. The slope is subjected to force, causing the first positioning block to overcome the force of the first elastic element and retract into the movable groove. The circuit base pushes the movable seat in the second positioning assembly through the connecting rod. The movable seat first drives the sleeve to slide along the fixed rod, so that the entire second positioning block extends outward and enters the second positioning groove on the side wall of the mounting groove. When the outer casing can no longer move forward after hitting the bottom of the second positioning groove, the connecting rod continues to push the movable seat, and the movable seat begins to move relative to the fixed seat, compressing the second elastic element. The relative movement of the movable seat and the fixed seat transmits the force to the anti-loosening plate through the first and second connecting rods, pushing the anti-loosening plate to slide outward radially along the outer casing. Due to tolerances, some anti-loosening plates will contact the inner wall of the second positioning groove first. For these anti-loosening plates that contact first, the second connecting rod connected to them will push the slider to slide in the groove and deform the third elastic element, while the anti-loosening plate itself stops moving. For those that do not contact the inner wall of the second positioning groove, their anti-loosening plates continue to move outward until the anti-slip pads on all anti-loosening plates are tightly fitted with the inner wall of the second positioning groove, thus realizing the self-adaptive tightening of the second positioning block. S4: When the circuit base is pressed to the lowest point and the pin is fully inserted into the socket, the first positioning block is aligned with the first positioning groove on the substrate. The restoring force of the first elastic element pushes the first positioning block to quickly spring into the first positioning groove, the circuit base and the substrate are locked, the pressing stops, and the installation is completed. S5: When it is necessary to disassemble the accessory body, push the push plate with your finger. The push plate will drive the first positioning block to overcome the force of the first elastic element and retract from the first positioning groove. After the first positioning block is unlocked, the shock-absorbing spring, which has been in a compressed state, will push the circuit seat to reset. The circuit seat will move relative to the connecting block, and drive the pin to be smoothly pulled out of the socket. At the same time, the circuit base pulls the second positioning component through the connecting rod, so that the moving base and the fixed base are relatively reset, the second elastic element extends, the first connecting rod and the second connecting rod retract, driving all the anti-loosening plates to retract radially and detach from the inner wall of the second positioning groove, and the entire second positioning block exits from the second positioning groove; When the circuit base drives the pusher to reset, the conical block exits from the concave hole of the piston plate. The piston plate is reset under the action of the fourth elastic element. The presence of the concave hole makes it difficult for the dust sucked into the pneumatic groove cavity to be sprayed out from the feed groove in reverse. Instead, it is left at the bottom of the cavity, thus avoiding secondary pollution.

[0015] Compared with the prior art, the present invention provides an external accessory for circuit breakers, a smart circuit breaker, and a method, which has the following beneficial effects: 1. In this invention, by pushing the circuit seat to move, the connecting rod pushes the moving seat, and then the first and second connecting rods drive multiple anti-loosening plates to move outward. Each anti-loosening plate forms an independent motion unit through its slider, groove and third elastic element. When an anti-loosening plate first contacts the inner wall of the second positioning groove, its corresponding second connecting rod will push the slider to compress the third elastic element instead of forcibly pushing the anti-loosening plate. The anti-loosening plates that have not been contacted will continue to move until they are all tightly fitted. This ensures that even if the size of the mounting groove is uneven, uniform and full-circumference flexible tightening can be achieved, eliminating connection gaps, realizing intelligent compensation for manufacturing tolerances and all-round adaptive locking, and solving the problem of connection misalignment caused by processing errors or wear. Compared with traditional snap-fit ​​fixing, the adaptive tightening structure greatly reduces the loosening rate of accessories and solves the problem that traditional rigid locking is prone to loosening under long-term vibration or temperature difference.

[0016] 2. In this invention, when the circuit base moves, it drives the pusher to move, the conical block is embedded in the concave hole of the piston plate to form a seal, and pushes the piston plate against the fourth elastic element to move upward. This action increases the volume of the inner cavity of the pneumatic groove, generating an instantaneous negative pressure. This negative pressure acts on the pin and socket area below through the feed groove, adsorbing and removing dust and light impurities on the surface before they come into contact, ensuring that each connection starts with a clean interface, significantly reducing contact resistance and improving the long-term reliability of the electrical connection.

[0017] 3. In this invention, when the push plate unlocks the first positioning block, the circuit base moves upward and resets under the action of the shock-absorbing spring. The conical block of the pusher then exits from the concave hole of the piston plate. The piston plate is pushed downward and resets under the push of the fourth elastic element. Since the conical block has disengaged, the compressed air is mainly discharged from the concave hole channel when the piston plate moves downward, rather than through the narrow feed trough in the opposite direction. This makes it easy to safely trap and seal the adsorbed dust at the bottom of the pneumatic trough, achieving harmless maintenance and preventing secondary leakage of adsorbed impurities during the cleaning process, which would cause pollution.

[0018] 4. In this invention, by integrating locking and cleaning functions into a simple press-and-release action, the process links the adaptive tightening of the second positioning component and the negative pressure suction of the cleaning component, with the spring-loaded locking of the first positioning block serving as the termination signal. During disassembly, a single push of the push plate can release the lock of the first positioning component, and then all components automatically and sequentially reset under the restoring force of the shock-absorbing spring. The integrated and automated design simplifies multiple complex operations into two intuitive steps, requiring no tools, significantly reducing the skill requirements of operators, and greatly shortening installation and maintenance time, thereby improving operational convenience and maintenance efficiency. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the circuit breaker body of the present invention; Figure 2 This is a partial cross-sectional view of the circuit breaker body and accessory body of the present invention. Figure 1 ; Figure 3 This is a partial cross-sectional view of the circuit breaker body and accessory body of the present invention. Figure 2 ; Figure 4 This is a partial cross-sectional view of the circuit breaker body and accessory body of the present invention. Figure 3 ; Figure 5 for Figure 4 Enlarged structural diagram of section A in the middle; Figure 6 This is a schematic diagram of the overall structure of the accessory body of the present invention; Figure 7This is a partial cross-sectional view of the accessory body of the present invention. Figure 1 ; Figure 8 This is a partial cross-sectional view of the accessory body of the present invention. Figure 2 ; Figure 9 This is a cross-sectional structural diagram of the second positioning seat of the present invention; Figure 10 This is a partial cross-sectional structural diagram of the connecting block of the present invention; Figure 11 for Figure 10 Enlarged structural diagram of section B.

[0020] In the diagram: 1. Circuit breaker body; 2. Accessory body; 201. Base plate; 2011. First positioning groove; 202. Connecting block; 203. Circuit socket; 2031. Pin; 3. Movable groove; 301. First positioning block; 302. First elastic element; 303. Push plate; 4. Receiving groove; 401. Fixed rod; 402. Second positioning block; 4021. Sleeve; 4022. Fixed seat; 4023. Housing; 4024. Moving seat; 4025. Second elastic element; 4026. First connecting rod; 4027. 1. Second connecting rod; 4028. Anti-loosening plate; 4029. Anti-slip pad; 403. Connecting rod; 5. Slide groove; 501. Slider; 502. Third elastic element; 6. Cavity; 601. Sealing film; 602. Closing seam; 7. Pneumatic groove; 701. Cover plate; 702. Partition plate; 703. Piston plate; 7031. Concave hole; 704. Fourth elastic element; 705. Pushing component; 7051. Push rod; 7052. Conical block; 8. Feed groove; 9. Mounting groove; 901. Second positioning groove; 10. Socket. Detailed Implementation

[0021] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0022] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0023] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 6 and Figure 7 As shown, this embodiment proposes an external accessory for a circuit breaker, including an accessory body 2 that is inserted into the circuit breaker body 1. The accessory body 2 includes: a base plate 201, a circuit base 203, and a positioning mechanism; the base plate 201 movably abuts against the circuit breaker body 1, and a connecting block 202 is fixedly provided on the base plate 201; the circuit base 203 is slidably disposed within the connecting block 202, and the circuit base 203 is provided with a plurality of pins 2031 electrically connected to the circuit breaker body 1; a shock-absorbing spring is provided between the circuit base 203 and the connecting block 202, the spring on one hand... The circuit breaker provides a reset spring force for the circuit breaker 203 and also buffers the impact during insertion. The positioning mechanism includes a second positioning component disposed in the connecting block 202 and driven by the circuit breaker 203, and a first positioning component disposed on the circuit breaker 203 for locking the circuit breaker 203 and the connecting block 202. The second positioning component is used to lock the accessory body 2 and the circuit breaker body 1. The connecting block 202 is also provided with a linkage cleaning component for assisting the insertion of the pin 2031 and the circuit breaker body 1. The core linkage component is made of a combination of engineering plastic and alloy materials. Specifically, the accessory body 2 is aligned with the mounting position on the circuit breaker body 1, so that the connecting block 202 enters the predetermined area, the base plate 201 contacts the surface of the circuit breaker, and pressure is applied to the circuit seat 203. The circuit seat 203 begins to slide relative to the connecting block 202, compressing the shock-absorbing spring between them. This action is the driving force for all subsequent functions. The movement of the circuit seat 203 drives the linkage cleaning component to start working through the mechanical structure, performing a cleaning procedure on the pin 2031 and the circuit breaker insertion area. At the same time, the movement of the circuit seat 203 also drives the second positioning component to start moving, causing it to move outward from the connecting block 202, preparing for locking the accessory and the circuit breaker. In the initial sliding stage, the first positioning component is in a compressed state due to the force, allowing the circuit seat 203 to move. When the circuit seat 203 is pressed to the bottom, the pin 2031 is inserted into the insertion area of ​​the circuit breaker to achieve electrical connection. At the same time, the second positioning component is engaged with the locking groove on the circuit breaker, completing the mechanical locking of the accessory and the circuit breaker. The entire installation process requires only a single press to automatically complete the cleaning, insertion, and double locking steps sequentially. Disassembly also requires only a single release action to automatically pop open, greatly simplifying the process, reducing the skill requirements for operators, and significantly improving installation and maintenance efficiency. It solves the obvious defects of rotating structures, such as threads or knobs easily loosening under vibration and slow operation speed, which do not meet the needs of rapid installation and maintenance of smart circuit breakers. The positioning mechanism effectively prevents loosening caused by vibration, ensuring the long-term stability of electrical connections. Furthermore, the cleaning function is mechanically linked with the installation action, automatically cleaning the electrical contact surfaces during the physical process of insertion, eliminating the need for pre-manual treatment and fundamentally avoiding poor contact problems caused by dust and impurities, thus improving the initial reliability of the connection. The self-adaptive tightening structure ensures the stability of the mechanical connection, while the negative pressure cleaning component ensures the reliability of the electrical connection. The combination of these two aspects significantly reduces the overall failure rate of the smart circuit breaker.

[0024] like Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, in a preferred embodiment, based on the above method, the first positioning component further includes a movable groove 3 formed on the circuit base 203, a first positioning block 301 slidably connected in the movable groove 3, and a first elastic element 302 disposed between the first positioning block 301 and the inner wall of the movable groove 3. A first positioning groove 2011 that cooperates with the first positioning block 301 is formed on the substrate 201. The top of the first positioning block 301, which is away from the first elastic element 302, has a pressing slope. The end of the first positioning block 301, which is close to the first elastic element 302, passes through the bottom of the circuit base 203 and is connected to the push plate 303. Specifically, when the circuit base 203 slides to a predetermined position relative to the substrate 201 under external pressure, the locking end of the first positioning block 301 aligns with the first positioning groove 2011 on the substrate 201. Previously, the pressing slope of the first positioning block 301 was pressed during contact with the lower surface of the substrate 201, forcing the first positioning block 301 to compress the first elastic element 302 and retract into the movable groove 3. After aligning with the first positioning groove 2011, the elastic force of the continuously pressed first elastic element 302 is released instantaneously, driving the first positioning block 301 to pop out rapidly, so that its locking end is embedded in the first positioning groove 2011. In the slot 2011, the circuit base 203 and the substrate 201 are firmly locked together by the pin-slot structure and cannot move relative to each other. When unlocking is required, the pushing force is transmitted through the push plate 303 to overcome the elastic force of the first elastic element 302 and push the entire first positioning block 301 to slide inward along the movable slot 3, so that its locking end completely exits from the first positioning slot 2011. After the first positioning block 301 is disengaged from the first positioning slot 2011, the mechanical interlock between the circuit base 203 and the substrate 201 is released, and the circuit base 203 can be reset under the action of the shock-absorbing spring.

[0025] like Figure 2 , Figure 3 , Figure 4 , Figure 7 , Figure 8 and Figure 9 As shown, in a preferred embodiment, based on the above method, the second positioning component further includes a receiving groove 4 in the connecting block 202, a fixing rod 401 fixed in the receiving groove 4, a second positioning block 402 slidably connected between the receiving groove 4 and the fixing rod 401, and a connecting rod 403 hinged between the second positioning block 402 and the circuit base 203. Furthermore, the second positioning block 402 includes a sleeve 4021 slidably connected to the outside of the fixed rod 401, a fixed seat 4022 fixedly mounted on the sleeve 4021, a housing 4023 fixedly connected to the fixed seat 4022, a movable seat 4024 slidably connected to the housing 4023 and hinged to the connecting rod 403, a second elastic element 4025 disposed between the housing 4023 and the movable seat 4024, a first connecting rod 4026 circumferentially hinged to the fixed seat 4022, and a second elastic element 4025 circumferentially hinged to the movable seat 4024. The connecting rod 4027 and the anti-loosening plate 4028 disposed between the first connecting rod 4026 and the second connecting rod 4027 are provided with an anti-slip pad 4029. The anti-loosening plate 4028 is slidably connected to the housing 4023. The anti-slip pad 4029 not only increases the friction but also plays a buffering and protective role, avoiding hard contact between the metal parts and the circuit breaker slot wall, preventing crushing or scratching of the slot wall, allowing local movement separation, preventing the overall mechanism from failing due to single-point resistance, and making the locking force distribution more gentle and uniform, thus improving the durability of the product. Specifically, when the circuit base 203 is pressed down, the connecting rod 403, which is hinged to it, pushes the movable base 4024. The movement of the movable base 4024 causes the entire second positioning block 402 to overcome resistance and slide as a whole along the fixed rod 401 towards the outside of the connecting block 202 until the front end of its outer casing 4023 enters or contacts the second positioning groove 901 on the circuit breaker body 1. When the second positioning block 402 can no longer move forward, that is, when the outer casing 4023 abuts against the bottom of the second positioning groove 901, as the circuit base 203 continues to move, the connecting rod 403 continues to push the movable base 4024 to slide relative to the fixed base 4022 inside the outer casing 4023, thereby compressing the second elastic element. The relative proximity between the movable seat 4024 and the fixed seat 4022 forces the first link 4026 and the second link 4027, which are hinged between the two, to unfold like scissors, pushing the anti-loosening plate 4028, which they are hinged together, outward along the radial direction of the outer shell 4023. Multiple anti-loosening plates 4028 move outward synchronously and are tightly pressed against the inner wall of the second positioning groove 901 by the anti-slip rubber pads 4029 on their surfaces, forming a strong radial clamping force and completing the locking. The linear motion of the circuit seat 203 is directly and efficiently converted into the compound motion of the second positioning block 402 through the connecting rod 403. It first advances linearly and then expands radially, resulting in a compact structure, low power loss, and rapid response.

[0026] It should be noted that the anti-loosening plate 4028 is provided with a sliding groove 5, and a slider 501 is slidably connected in the sliding groove 5. A third elastic element 502 is provided between the slider 501 and the inner wall of the sliding groove 5. The end of the second connecting rod 4027 away from the moving seat 4024 is movably connected to the slider 501. Specifically, when the second positioning component begins to radially tighten, the moving seat 4024 moves, pushing the anti-loosening plate 4028 outward via the first link 4026 and the second link 4027. The thrust of the second link 4027 acts directly on the slider 501 hinged to it, and the thrust is transmitted to the entire anti-loosening plate 4028 through the slider 501, driving it to slide radially outward along the outer shell 4023. If an anti-loosening plate 4028 contacts the inner wall of the circuit breaker's second positioning groove 901 prematurely during its stroke and cannot continue to move, the second link 4027 will not stop pushing. At this time, the continuous thrust will force the slider 501 to compress the third elastic element 502 within the groove 5 and slide relative to the already stationary anti-loosening plate 4028. This sliding process allows the second link... 4027 continues its movement without the entire linkage mechanism being jammed or damaged due to the obstruction of the anti-loosening plate 4028; ultimately, regardless of whether the anti-loosening plates 4028 reach the groove wall in advance, the sliders 501 on them will move under the push of the connecting rod and compress the third elastic element 502 to a certain extent; even if the first positioning block 301 wobbles slightly in the first positioning groove 2011, causing the connecting rod 403 to release the thrust on the moving seat 4024, it will only cause the slider 501 to return to its original position in the sliding groove 5, while the anti-loosening plate 4028 will still maintain a tight contact with the second positioning groove 901; this ensures that under the condition of dimensional tolerance, all anti-loosening plates 4028 can contribute effective clamping force, solving the problem of uneven locking force caused by tolerance.

[0027] like Figure 6 and Figure 7 As shown, in a preferred embodiment, based on the above method, the connecting block 202 further includes a cavity 6 for accommodating the pin 2031. A sealing film 601 is provided on the top of the cavity 6, and a closing slit 602 is provided in the center of the sealing film 601. The sealing film 601 is made of wear-resistant silicone rubber. Specifically, by providing a sealing film 601 on the top of the cavity 6, external dust and impurities can be prevented from adhering to the surface of the pin 2031. The closing slit 602 facilitates the pin 2031 passing through the sealing film 601, and the closing slit 602 automatically opens when pushed up by the pin 2031.

[0028] like Figure 10 and Figure 11As shown, in a preferred embodiment, based on the above method, the linkage cleaning component further includes a pneumatic groove 7 formed on the connecting block 202, a cover plate 701 set on the top of the pneumatic groove 7, a partition plate 702 fixed on the cover plate 701, a piston plate 703 slidably connected between the partition plate 702 and the inner wall of the pneumatic groove 7, a fourth elastic element 704 set between the piston plate 703 and the inner wall of the pneumatic groove 7, and a pusher 705 set on the circuit base 203 and moving against the piston plate 703. The cover plate 701 is removable to clean the dust and impurities in the pneumatic groove 7. The partition 702 divides the pneumatic slot 7 into an outer cavity and an inner cavity. The bottoms of the outer cavity and the inner cavity are connected to each other. The piston plate 703 is slidably connected in the inner cavity. The cover plate 701 has a feed chute 8 at the outer cavity. Furthermore, the pusher 705 includes a push rod 7051 fixedly connected to the circuit base 203 and a tapered block 7052 disposed at the end of the push rod 7051, and the piston plate 703 is provided with a concave hole 7031 that cooperates with the tapered block 7052. Specifically, before the accessory is installed, the piston plate 703 is located on the lower side of the inner cavity, and the conical block 7052 of the pusher 705 is not in contact with the piston plate 703. When the circuit seat 203 is pressed for installation, the pusher 705 fixed on it moves accordingly, and the conical block 7052 at the end of the push rod 7051 is inserted into and tightly embedded in the concave hole 7031 of the piston plate 703, forming an effective seal. As the circuit seat 203 continues to be pressed down, the pusher 705 pushes the piston plate 703, causing it to overcome the elastic force of the fourth elastic element 704 and slide in the inner cavity. The movement of the stopper plate 703 increases the volume of the space below it, thus creating negative pressure. Since the inner cavity is connected to the outer cavity through the space at the bottom of the partition plate 702, this negative pressure is transmitted to the upper space of the entire pneumatic slot 7. The negative pressure draws air outward through the feed trough 8, thereby drawing dust and light impurities located outside the feed trough 8, directly opposite the pin 2031 and the circuit breaker insertion area, into the outer and inner cavities of the pneumatic slot 7. This process is completed before the pin 2031 is fully inserted, achieving cleaning before connection without any physical scratching of the pin 2031 and the socket 10. Regarding abrasion damage, it should be noted that existing cleaning devices are mostly independent peripherals. This application links the cleaning function with the plugging action, requiring no additional operation. If a brush is used, the bristles are prone to leaving residual impurities or abrading the surface of the pin 2031, which increases the contact resistance. The negative pressure suction cleaning component effectively reduces the interface contact resistance. When the accessory is disassembled, the circuit base 203 resets, the pusher 705 resets accordingly, and the cone block 7052 exits from the concave hole 7031 of the piston plate 703. The piston plate 703 is subjected to the restoring force of the fourth elastic element 704. When the piston plate 703 returns to its initial position at the top of the inner cavity, it will compress the air below it. However, since the conical block 7052 has already returned to its initial position relative to the piston plate 703 under the action of the damping spring along with the circuit seat 203, the concave hole 7031 forms a channel, and the compressed air will be discharged preferentially through the concave hole 7031. Since the feed trough 8 has a small diameter and a relatively tortuous path, most of the dust that is sucked in will settle at the bottom of the pneumatic trough 7 under the action of the airflow, instead of being forcefully blown out from the feed trough 8 in the opposite direction, thus effectively avoiding secondary pollution of the cleaned items.

[0029] like Figure 1 , Figure 2 and Figure 3As shown, this embodiment proposes a smart circuit breaker, including an external accessory for the circuit breaker and a circuit breaker body 1. The outer side of the circuit breaker body 1 is provided with an installation groove 9 for placing a connecting block 202 and a circuit base 203. The inner wall of the installation groove 9 is provided with a second positioning groove 901 that cooperates with the second positioning block 402, providing physical guidance, mechanical locking points and electrical interfaces for the installation of the accessory. A socket 10 electrically connected to the pin 2031 is also fixed in the installation groove 9. The internal metal spring of the socket 10 is connected to the circuit inside the circuit breaker body 1. Its interface definition (such as the number of pins, arrangement and electrical parameters) is completely matched with the configuration of the pin 2031 on the accessory, and is used to establish an electrical connection after the accessory is installed in place.

[0030] The present invention also discloses a method of using the smart circuit breaker described above, comprising the following steps: S1: Align the connecting block 202 and the circuit socket 203 of the accessory body 2 with the mounting groove 9 of the circuit breaker body 1 and insert them until the base plate 201 contacts the housing of the circuit breaker body 1. At this time, the pin 2031 has not yet been inserted into the socket 10 and the second positioning block 402 has not entered the second positioning groove 901. S2: By pushing the circuit base 203, the circuit base 203 drives the conical block 7052 of the pusher 705 to move. The conical block 7052 inserts into the concave hole 7031 of the piston plate 703 and forms a seal. The piston plate 703 continues to be pushed, compressing the fourth elastic element 704. The upward movement of the piston plate 703 causes the cavity of the pneumatic groove 7 to generate negative pressure. This negative pressure acts on the area of ​​the pin 2031 and the socket 10 through the feed groove 8, sucking away the light dust on the surface. S3: When the circuit base 203 moves, the pressing slope on the first positioning block 301 contacts the edge of the first positioning groove 2011 on the substrate 201. The slope is subjected to force, causing the first positioning block 301 to overcome the force of the first elastic element 302 and retract into the movable groove 3. The circuit base 203 pushes the movable base 4024 in the second positioning assembly through the connecting rod 403. The movable base 4024 first drives the sleeve 4021 to slide along the fixed rod 401, so that the entire second positioning block 402 extends outward and enters the second positioning groove 901 on the side wall of the mounting groove 9. When the outer casing 4023 can no longer move forward after hitting the bottom of the second positioning groove 901, the connecting rod 403 continues to push the movable seat 4024. The movable seat 4024 begins to move relative to the fixed seat 4022, compressing the second elastic element 4025. The relative movement of the movable seat 4024 and the fixed seat 4022 transmits the force to the anti-loosening plate 4028 through the first connecting rod 4026 and the second connecting rod 4027, pushing the anti-loosening plate 4028 to slide radially outward along the outer casing 4023. Due to tolerances, some anti-loosening plates 4028 will first contact the inner wall of the second positioning groove 901. For these anti-loosening plates 4028 that contact first, the second connecting rod 4027 connected to them will push the slider 501 to slide in the groove 5 and deform the third elastic element 502, while the anti-loosening plate 4028 itself will stop moving. For those that do not contact the inner wall of the second positioning groove 901, their anti-loosening plates 4028 continue to move outward until the anti-slip pads 4029 on all anti-loosening plates 4028 are tightly fitted with the inner wall of the second positioning groove 901, thus realizing the self-adaptive tightening of the second positioning block 402. S4: When the circuit base 203 is pressed to the lowest point, the pin 2031 is fully inserted into the socket 10. At this time, the first positioning block 301 is aligned with the first positioning groove 2011 on the substrate 201. The restoring force of the first elastic element 302 pushes the first positioning block 301 to quickly spring into the first positioning groove 2011. The circuit base 203 and the substrate 201 are locked, the pressing stops, and the installation is completed. S5: When it is necessary to disassemble the accessory body 2, push the push plate 303 with your finger. The push plate 303 drives the first positioning block 301 to overcome the force of the first elastic element 302 and retract from the first positioning groove 2011. After the first positioning block 301 is unlocked, the shock-absorbing spring that has been in a compressed state pushes the circuit seat 203 to reset. The circuit seat 203 moves relative to the connecting block 202, driving the pin 2031 to be smoothly pulled out from the socket 10. At the same time, the circuit base 203 pulls the second positioning component through the connecting rod 403, so that the moving base 4024 and the fixed base 4022 are relatively reset, the second elastic element 4025 extends, the first connecting rod 4026 and the second connecting rod 4027 retract, and drive all the anti-loosening plates 4028 to radially retract and separate from the inner wall of the second positioning groove 901, and the entire second positioning block 402 exits from the second positioning groove 901; When the circuit base 203 drives the pusher 705 to reset, the conical block 7052 exits from the concave hole 7031 of the piston plate 703. The piston plate 703 is reset under the action of the fourth elastic element 704. The presence of the concave hole 7031 makes it difficult for the dust sucked into the inner cavity of the pneumatic groove 7 to be sprayed out in reverse from the feed groove 8, but is left at the bottom of the cavity, thereby avoiding secondary pollution.

[0031] The accompanying drawings in this application are for illustrative purposes only. The dimensions and shapes of the components shown are not actual limitations but are merely schematic representations. In actual implementation, the components can be reasonably configured and adjusted according to specific needs and actual conditions.

[0032] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. An external accessory for a circuit breaker, comprising an accessory body (2) that plugs into the circuit breaker body (1), characterized in that, The accessory body (2) includes: The base plate (201) is movable against the circuit breaker body (1), and a connecting block (202) is fixed on the base plate (201). Circuit base (203), the circuit base (203) is slidably disposed in the connecting block (202), the circuit base (203) is provided with a plurality of pins (2031) electrically connected to the circuit breaker body (1), and a shock-absorbing spring is provided between the circuit base (203) and the connecting block (202); And a positioning mechanism, the positioning mechanism including a second positioning component disposed in the connecting block (202) and driven by the circuit seat (203) and a first positioning component disposed on the circuit seat (203) for locking the circuit seat (203) and the connecting block (202), the second positioning component being used to lock the accessory body (2) and the circuit breaker body (1). The connecting block (202) is also provided with a linkage cleaning component for assisting the insertion of the pin (2031) and the circuit breaker body (1).

2. An external accessory for a circuit breaker according to claim 1, characterized in that, The first positioning component includes a movable groove (3) formed on the circuit base (203), a first positioning block (301) slidably connected in the movable groove (3), and a first elastic element (302) disposed between the first positioning block (301) and the inner wall of the movable groove (3). The substrate (201) is provided with a first positioning groove (2011) that cooperates with the first positioning block (301). The first positioning block (301) has a pressing slope at the top of the end away from the first elastic element (302), and the end of the first positioning block (301) near the first elastic element (302) passes through the bottom of the circuit base (203) and is connected to the push plate (303).

3. An external accessory for a circuit breaker according to claim 2, characterized in that, The second positioning component includes a receiving groove (4) in the connecting block (202), a fixing rod (401) fixed in the receiving groove (4), a second positioning block (402) slidably connected between the receiving groove (4) and the fixing rod (401), and a connecting rod (403) hinged between the second positioning block (402) and the circuit base (203).

4. An external accessory for a circuit breaker according to claim 3, characterized in that, The second positioning block (402) includes a sleeve (4021) slidably connected to the outside of the fixed rod (401), a fixed seat (4022) fixed on the sleeve (4021), a housing (4023) fixedly connected to the fixed seat (4022), a movable seat (4024) slidably connected to the housing (4023) and hinged to the connecting rod (403), and a second elastic element (4025) disposed between the housing (4023) and the movable seat (4024). The first connecting rod (4026) is evenly hinged to the fixed seat (4022) in a circular manner, the second connecting rod (4027) is evenly hinged to the movable seat (4024) in a circular manner, and the anti-loosening plate (4028) is disposed between the first connecting rod (4026) and the second connecting rod (4027). The anti-loosening plate (4028) is provided with an anti-slip rubber pad (4029), and the anti-loosening plate (4028) is slidably connected to the outer shell (4023).

5. An external accessory for a circuit breaker according to claim 4, characterized in that, The anti-loosening plate (4028) has a groove (5), and a slider (501) is slidably connected in the groove (5). A third elastic element (502) is provided between the slider (501) and the inner wall of the groove (5). The end of the second connecting rod (4027) away from the moving seat (4024) is movably connected to the slider (501).

6. An external accessory for a circuit breaker according to claim 5, characterized in that, The connecting block (202) has a cavity (6) for accommodating the pin (2031), and a sealing film (601) is provided on the top of the cavity (6). A closing slit (602) is provided in the center of the sealing film (601).

7. An external accessory for a circuit breaker according to claim 6, characterized in that, The linkage cleaning assembly includes a pneumatic groove (7) opened on the connecting block (202), a cover plate (701) set on the top of the pneumatic groove (7), a partition plate (702) fixed on the cover plate (701), a piston plate (703) slidably connected between the partition plate (702) and the inner wall of the pneumatic groove (7), a fourth elastic element (704) set between the piston plate (703) and the inner wall of the pneumatic groove (7), and a pusher (705) set on the circuit base (203) and movingly abutting against the piston plate (703); The partition (702) divides the pneumatic groove (7) into an outer cavity and an inner cavity. The bottom of the outer cavity and the inner cavity are connected to each other. The piston plate (703) is slidably connected in the inner cavity. The cover plate (701) has a feed groove (8) at the outer cavity.

8. An external accessory for a circuit breaker according to claim 7, characterized in that, The pusher (705) includes a push rod (7051) fixedly connected to the circuit base (203) and a conical block (7052) disposed at the end of the push rod (7051). The piston plate (703) is provided with a plurality of concave holes (7031) that cooperate with the conical block (7052) evenly in a circular pattern. The flow cross-sectional area of ​​the feed groove (8) is smaller than the opening area of ​​the concave holes (7031).

9. A smart circuit breaker, comprising an external accessory for the circuit breaker as described in claim 8 and a circuit breaker body (1), characterized in that, The circuit breaker body (1) has an installation groove (9) on its outer side for placing a connecting block (202) and a circuit socket (203). The inner wall of the installation groove (9) has a second positioning groove (901) that cooperates with the second positioning block (402). The installation groove (9) also has a socket (10) that is electrically connected to the pin (2031).

10. A method of using the intelligent circuit breaker according to claim 9, characterized in that, Includes the following steps: S1: Align the connecting block (202) and circuit socket (203) of the accessory body (2) with the mounting groove (9) of the circuit breaker body (1) and insert them until the base plate (201) contacts the housing of the circuit breaker body (1). At this time, the pin (2031) has not yet been inserted into the socket (10) and the second positioning block (402) has not entered the second positioning groove (901). S2: By pushing the circuit seat (203), the circuit seat (203) drives the conical block (7052) of the pusher (705) to move. The conical block (7052) inserts into the concave hole (7031) of the piston plate (703) and forms a seal. Continue to push the piston plate (703) to compress the fourth elastic element (704). The piston plate (703) moves upward, causing the cavity of the pneumatic groove (7) to generate negative pressure. This negative pressure acts on the area of ​​the pin (2031) and the socket (10) through the feed groove (8) to suck away the light dust on the surface. S3: When the circuit base (203) moves, the pressing slope on the first positioning block (301) contacts the edge of the first positioning groove (2011) on the substrate (201). The slope is subjected to force, causing the first positioning block (301) to overcome the force of the first elastic element (302) and retract into the movable groove (3). The circuit base (203) pushes the movable base (4024) in the second positioning assembly through the connecting rod (403). The movable base (4024) first drives the sleeve (4021) to slide along the fixed rod (401), so that the entire second positioning block (402) extends outward and enters the second positioning groove (901) on the side wall of the mounting groove (9). When the outer casing (4023) can no longer move forward against the bottom of the second positioning groove (901), the connecting rod (403) continues to push the movable seat (4024), and the movable seat (4024) begins to move relative to the fixed seat (4022), compressing the second elastic element (4025). The relative movement of the movable seat (4024) and the fixed seat (4022) transmits the force to the anti-loosening plate (4028) through the first connecting rod (4026) and the second connecting rod (4027), pushing the anti-loosening plate (4028) to slide radially outward along the outer casing (4023); Due to tolerances, some anti-loosening plates (4028) will first contact the inner wall of the second positioning groove (901). For these anti-loosening plates (4028) that contact first, the second connecting rod (4027) connected to them will push the slider (501) to slide in the groove (5) and deform the third elastic element (502), while the anti-loosening plate (4028) itself stops moving. For those that do not contact the inner wall of the second positioning groove (901), their anti-loosening plates (4028) continue to move outward until the anti-slip pads (4029) on all anti-loosening plates (4028) are tightly fitted with the inner wall of the second positioning groove (901), thus realizing the adaptive tightening of the second positioning block (402). S4: When the circuit base (203) is pressed to the lowest point, the pin (2031) is fully inserted into the socket (10). At this time, the first positioning block (301) is aligned with the first positioning groove (2011) on the substrate (201). The restoring force of the first elastic element (302) pushes the first positioning block (301) to spring into the first positioning groove (2011) quickly. The circuit base (203) and the substrate (201) are locked, the pressing stops, and the installation is completed. S5: When it is necessary to disassemble the accessory body (2), push the push plate (303) with your finger. The push plate (303) drives the first positioning block (301) to overcome the force of the first elastic element (302) and retract from the first positioning groove (2011). After the first positioning block (301) is unlocked, the shock-absorbing spring that has been in a compressed state pushes the circuit seat (203) to reset. The circuit seat (203) moves relative to the connecting block (202), driving the pin (2031) to be smoothly pulled out from the socket (10). At the same time, the circuit base (203) pulls the second positioning component through the connecting rod (403), so that the moving base (4024) and the fixed base (4022) are relatively reset, the second elastic element (4025) extends, the first connecting rod (4026) and the second connecting rod (4027) retract, driving all the anti-loosening plates (4028) to radially retract and detach from the inner wall of the second positioning groove (901), and the entire second positioning block (402) exits from the second positioning groove (901); When the circuit base (203) drives the pusher (705) to reset, the conical block (7052) exits from the concave hole (7031) of the piston plate (703). The piston plate (703) is reset under the action of the fourth elastic element (704). The presence of the concave hole (7031) makes it difficult for the dust sucked into the inner cavity of the pneumatic groove (7) to be sprayed out in reverse from the feed groove (8), but is left at the bottom of the cavity, thereby avoiding secondary pollution.

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