A monitoring assembly and back-up protector

Abstract

The application provides a monitoring assembly and a backup protector. The monitoring assembly comprises a monitoring assembly shell, a monitoring wrench and a connecting rod. The monitoring wrench is rotatably arranged on the monitoring assembly shell. The connecting rod is connected with the monitoring wrench. The connecting rod comprises a first rotating shaft end and a second rotating shaft end. When the monitoring wrench is rotated to an open position corresponding to the closed state of the backup protector, the axis center line of the first rotating shaft end and the second rotating shaft end is below the axis center of the first positioning shaft of the monitoring assembly shell. The reverse pushing force of the connecting rod on the monitoring wrench and the restoring force of the wrench torsional spring form a self-locking state, so that the monitoring wrench is kept in the open position. Further, the small movement of the monitoring wrench is converted into the large switching displacement of the switch elastic sheet by the push rod, and the switch elastic sheet is switched between different connection states to output corresponding monitoring signals. Through the above structure, the monitoring wrench can be stably kept and quickly switched, and the reliability of the conversion of the mechanical state of the backup protector and the monitoring signal is improved.

Description

Technical Field

[0001] This invention relates to the field of lightning protection equipment, specifically to a monitoring component and a backup protector. Background Technology

[0002] Transient surges caused by lightning overvoltages, power system operational overvoltages, and abnormal voltage fluctuations are significant factors leading to equipment damage. Currently, surge protectors are widely used in power lines and signal lines to suppress transient overvoltages caused by lightning strikes or grid fluctuations, protecting downstream equipment. To prevent short circuits, arcing, or even safety accidents caused by continuous fault current after surge protector failure, a backup protector is typically installed upstream of the surge protector. This backup protector quickly disconnects the fault circuit in case of abnormal faults, improving system operational safety.

[0003] With the rapid development of DC applications such as photovoltaic power generation, energy storage systems, DC charging equipment, and data centers, the application scope of DC power distribution systems is constantly expanding, placing higher demands on the reliability and intelligent monitoring capabilities of backup protectors. Because DC current does not have a natural zero-crossing point, the arc generated during DC fault interruption is difficult to extinguish on its own, easily leading to problems such as contact erosion, arc reignition, and interruption failure. Therefore, existing backup protectors typically require specialized arc-extinguishing and rapid interruption structures to improve fault current interruption capabilities.

[0004] In practical applications, existing backup protectors and monitoring components typically employ relatively independent detection structures. The monitoring component senses the backup protector's operating status through a separate detection mechanism. This not only increases the overall structural complexity and installation space but also may lead to asynchrony between the independent detection mechanism and the actual actions of the backup protector during closing, opening, or fault tripping. When the actual protection status of the backup protector differs from the status signal output by the monitoring component, it can easily cause misjudgments of the backup protector's operating status by the external control system, affecting the timeliness of remote monitoring and fault handling. Summary of the Invention

[0005] In view of this, the present invention aims to provide a monitoring component for a backup protector. The backup protector includes a tripping mechanism wrench, and the monitoring component includes a monitoring component housing, a monitoring wrench, and a connecting rod. The monitoring wrench is rotatably disposed in the monitoring component housing and extends through an opening on one side of the housing, and is throttle-connected to the tripping mechanism wrench, so as to rotate with the tripping mechanism wrench between an open position corresponding to the backup protector's closed state and a closed position corresponding to the backup protector's open state. The monitoring component housing is provided with a first positioning shaft, and the monitoring wrench includes a wrench positioning hole, a first connecting rod positioning hole, and a wrench torsion spring. The wrench positioning hole is fitted onto the first positioning shaft to allow the monitoring wrench to rotate. The hand rotates around the first positioning axis; the connecting rod includes a connecting rod body and a first rotating shaft end and a second rotating shaft end respectively disposed at both ends of the connecting rod body. The first rotating shaft end is rotatably sleeved in the first connecting rod positioning hole so as to rotate around the first positioning axis with the monitoring component; when the monitoring wrench rotates to the open position corresponding to the closed state of the backup protector, the axis connecting the first rotating shaft end and the second rotating shaft end is located below the axis of the first positioning axis, so that the reverse pushing force of the connecting rod on the monitoring wrench and the restoring force of the wrench torsion spring form a self-locking state, thereby keeping the monitoring wrench in the open position.

[0006] Optionally, the wrench torsion spring is arranged around the wrench positioning hole, with one end of the wrench torsion spring fixed to the monitoring wrench and the other end fixed to the inner wall of the monitoring component housing, so as to provide the restoring force to the monitoring wrench.

[0007] Optionally, the distance X between the axis of the first positioning shaft and the line connecting the axes of the first rotating shaft end and the second rotating shaft end is 1mm to 2mm.

[0008] Optionally, the connecting rod body is a V-shaped connecting rod structure, with the opening of the V-shaped connecting rod structure facing the opening of the monitoring component housing, so as to form a clearance space when the first rotating shaft end moves with the monitoring wrench, thereby avoiding the connecting rod body from colliding with the side wall of the opening of the monitoring component housing, and the included angle of the opening of the V-shaped connecting rod structure is 110° to 130°.

[0009] Optionally, the monitoring component further includes a lever, and the housing of the monitoring component is also provided with a second positioning shaft. The lever is provided with a lever positioning hole and a connecting rod limiting groove. The lever positioning hole is sleeved on the second positioning shaft so that the lever can rotate around the second positioning shaft. The second rotating shaft end is movably disposed in the connecting rod limiting groove so that the lever can rotate when the second rotating shaft end moves.

[0010] Optionally, the lever includes a first support rod and a second support rod connected to each other, with the first support rod located above the second support rod; the first support rod includes an upper end, a lever positioning hole, and a connecting rod limiting groove, with the connecting rod limiting groove disposed at the upper end; the second support rod includes a lower end, with a first distance between the lower end and the lever positioning hole being greater than a second distance between the upper end and the lever positioning hole, so that when the upper end of the lever moves left and right a small distance, it drives the lower end of the lever to move left and right a large distance in the opposite direction.

[0011] Optionally, the monitoring component further includes a tension spring and a signal transmission component, and the monitoring component housing further includes a third positioning shaft; the second support rod further includes a sleeve shaft, a sinking platform, a first limiting shaft and a second limiting shaft, the sleeve shaft is disposed on the side of the second support rod facing the third positioning shaft, one end of the tension spring is sleeved on the sleeve shaft and the other end is sleeved on the third positioning shaft; the sinking platform is disposed on the side of the second support rod facing the signal transmission component, the first limiting shaft and the second limiting shaft are disposed on the sinking platform, and a spring limiting gap is formed between the first limiting shaft and the second limiting shaft.

[0012] Optionally, the signal transmission component includes a first terminal, a second terminal, a third terminal, and a switch spring; the first terminal, the second terminal, and the third terminal are arranged sequentially from top to bottom and are air-spaced with each other; the fixed end of the switch spring is fixedly connected to the first terminal; the middle part of the switch spring is disposed in the spring limiting gap; and the free end of the switch spring is located between the second terminal and the third terminal, so as to switch between contacting the second terminal and contacting the third terminal when the lever is rotated.

[0013] The present invention also provides a backup protector, including a backup protection component and a monitoring component as described in any of the above claims; the backup protection component further includes a backup protection housing and the tripping mechanism wrench, the tripping mechanism wrench extending through an opening on one side of the backup protection housing and rotatably disposed relative to the backup protection housing; the monitoring component is disposed on one side of the backup protection component, the monitoring wrench is throttle-connected to the tripping mechanism wrench so that the monitoring wrench rotates with the tripping mechanism wrench; the tripping mechanism wrench has a mounting hole on the side facing the monitoring component, and a convex shaft on the side facing the tripping mechanism wrench, the convex shaft being inserted into the mounting hole.

[0014] Optionally, the backup protective housing has two hook slots and one slot. The two hook slots are respectively located on the two sides of the backup protective housing adjacent to the side where the tripping mechanism wrench is located, and the slot is located on the side of the backup protective housing opposite to the side where the tripping mechanism wrench is located. The monitoring component housing has two hooks and one snap-fit ​​element. The two hooks are respectively hooked into the two hook slots, and the snap-fit ​​element is snapped into the slot.

[0015] This invention utilizes the mechanical linkage between the backup protection component and the monitoring component to synchronously transmit the closing and opening actions of the backup protector to the monitoring component. The corresponding electrical signals are then output through the signal transmission component, thereby achieving synchronous conversion between the mechanical state of the backup protector and external monitoring signals, improving the accuracy and reliability of state monitoring. In particular, this invention, through the centering position relationship of the linkage, enables the monitoring wrench to form a stable self-locking state at the corresponding closing position, and can quickly release the self-locking state during opening, thus improving the reliability of maintaining the closing state and switching between opening states.

[0016] Meanwhile, the present invention forms a multi-level mechanical linkage by monitoring the wrench, connecting rod and lever, and through the displacement amplification effect of the lever, converts the small movement of the monitoring wrench into a large switching displacement of the switch spring, increasing the contact switching margin; furthermore, by bidirectional limiting and driving the switch spring, the action determinism of the signal transmission component and the reliability of contact switching are improved.

[0017] Furthermore, the present invention creates clearance space through a V-shaped linkage structure, reducing interference between the linkage and the monitoring component housing during linkage. The monitoring component is detachably installed on one side of the backup protection component through a hook-and-loop structure, thereby achieving status monitoring without changing the main tripping structure inside the backup protection component and improving the ease of installation and maintenance of the monitoring component. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings of the embodiments will be briefly described below. Obviously, the drawings described below only relate to some embodiments of the present invention and are not intended to limit the present invention.

[0019] Figure 1 This is a schematic diagram of the backup protector provided in an embodiment of the present invention.

[0020] Figure 2 This is a schematic diagram of the backup protection component and the monitoring component in the backup protector after being separated from each other, taken from the first angle.

[0021] Figure 3 This is a schematic diagram of the backup protection component and the monitoring component in the backup protector from a second angle.

[0022] Figure 4 A schematic diagram of the internal structure of the monitoring component after part of the housing has been opened and the monitoring wrench has been turned to the open position.

[0023] Figure 5 A schematic diagram of the internal structure of the monitoring component when the monitoring wrench is turned to the closed position after part of the housing is opened.

[0024] Figure 6 This is a schematic diagram of the lever structure of the monitoring component.

[0025] Figure 7 This is a schematic diagram and equivalent circuit diagram of the lever, tension spring and signal transmission component in the monitoring assembly when the monitoring wrench is in the open state.

[0026] Figure 8 This is a schematic diagram and equivalent circuit diagram of the linkage rod, tension spring and signal transmission component in the monitoring component when the monitoring wrench is closed.

[0027] Figure 9 This is a schematic diagram of the front and back of the lever and signal transmission component in the monitoring assembly when the monitoring wrench is in the open state.

[0028] Figure 10 This is a schematic diagram of the front and back of the lever and signal transmission component in the monitoring assembly when the monitoring wrench is closed. Detailed Implementation

[0029] To make the objectives, technical solutions, and effects of the present invention clearer, 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.

[0030] Please refer to Figure 1-3 An embodiment of the present invention provides a backup protector 999 including a backup protection component 100 and a monitoring component 200. The monitoring component 200 is detachably installed on one side of the backup protection component 100 and can move synchronously with the closing and opening states of the backup protection component 100, and can provide corresponding electrical signals to the outside. In some practical application scenarios, the monitoring component 200 is used as a remote signaling component.

[0031] The backup protection assembly 100 includes a backup protection housing 110 and a tripping mechanism wrench 120. The backup protection housing 110 is used to carry the various components of the backup protection assembly 100. The tripping mechanism wrench 120 extends through an opening on one side of the backup protection housing 110 and is rotatably configured relative to the backup protection housing 110. As the user moves the tripping mechanism wrench 120, switching it between a first position and a second position of the backup protection housing 110, the backup protection assembly 100 switches between an open state and a closed state. In this embodiment, the first position is when the tripping mechanism wrench 120 is pulled towards the upper side of the housing 100, and the second position is when the tripping mechanism wrench 120 is pulled towards the lower side of the backup protection housing 110. The tripping mechanism wrench 120 has a mounting hole 122 on the side facing the monitoring assembly 200. The housing 110 includes two mounting slots 112 and a locking slot 114. Two mounting slots 112 are respectively disposed on the two sides of the backup protective housing 110 adjacent to the side where the tripping mechanism wrench 120 is located, and a slot 114 is disposed on the other side of the backup protective housing 110 opposite to the side where the tripping mechanism wrench 120 is located.

[0032] The monitoring component 200 includes a monitoring component housing 210 and a monitoring wrench 220. The monitoring component housing 210 and the backup protective housing 110 have substantially the same shape in the thickness direction, allowing them to be connected to each other in the thickness direction. The monitoring wrench 220 extends from an opening on one side of the monitoring component housing 210 and is rotatably mounted relative to the housing 210. The monitoring wrench 220 is positioned corresponding to the tripping mechanism wrench 120 to achieve synchronous rotation with it. The monitoring wrench 220 includes a convex shaft 222, which is located adjacent to the tripping mechanism wrench 120 for insertion into the mounting hole 122 of the tripping mechanism wrench 120. The monitoring component housing 210 includes two hooks 212 and a snap-fit ​​member 214. Two hooks 212 are respectively positioned on opposite sides of the monitoring component housing 210, adjacent to the side where the monitoring wrench 220 is located, and near the side of the backup protection component 100, to be respectively hooked into the two hooking slots 112. A snap-fit ​​component 214 is provided on the side of the monitoring component housing 210 opposite to the side where the monitoring wrench 220 is located, to be correspondingly snapped into the snap-fit ​​slot 114.

[0033] Please refer to Figure 4-5The internal structure visible after the monitoring component housing 210 is partially opened includes a first positioning shaft 211, a second positioning shaft 213, and a third positioning shaft 215. The first positioning shaft 211 is located at the upper center of the housing 210, the second positioning shaft 213 is located at the upper right side of the housing 210, and the third positioning shaft 215 is located at the middle right side of the housing 210. The monitoring wrench 220 also includes a wrench positioning hole 224, a first connecting rod positioning hole 226, and a wrench torsion spring 228. The monitoring wrench 220 is fitted onto the first positioning shaft 211 through the wrench positioning hole 224, allowing the monitoring wrench 220 to rotate around the first positioning shaft 211. The first connecting rod positioning hole 226 is located on the monitoring wrench 220, on one side of the wrench positioning hole 224, and rotates with the monitoring wrench 220 around the first positioning shaft 211. A torsion spring 228 is arranged around the wrench positioning hole 224. One end of the spring is fixed to the monitoring wrench 220, and the other end is fixed to the inner wall of the monitoring component housing 210. The spring provides spring torque to the monitoring wrench 220, so that the monitoring wrench 220 has a restoring force after being turned by an external force.

[0034] See in combination Figure 4-6 The monitoring component 200 also includes a connecting rod 230, a lever 240, a tension spring 250, and a signal transmission component 260. The connecting rod 230, lever 240, tension spring 250, and signal transmission component 260 are installed inside the monitoring component housing 210. The connecting rod 230 includes a connecting rod body 232, a first rotating shaft end 234, and a second rotating shaft end 236. The first rotating shaft end 234 and the second rotating shaft end 236 are respectively located at both ends of the connecting rod body 232 and extend towards the monitoring component housing 210 from both ends of the connecting rod body 232. The first rotating shaft end 234 is rotatably fitted into the first connecting rod positioning hole 226 so as to rotate with the monitoring wrench 220 around the first positioning shaft 211. The second rotating shaft end 236 is movably fitted into the upper end 2421 of the lever 240 so as to drive the upper end 2421 of the lever 240 to swing left and right. In this embodiment, the connecting rod body 232 is a V-shaped connecting rod structure, with the V-shaped opening facing upwards. This allows for clearance between the connecting rod 230's first pivot end 234 and the right side wall of the monitoring component housing 210's opening when the connecting rod 230 is moved upwards and to the left by the monitoring wrench 220, thus avoiding mutual contact. The included angle M of the V-shaped opening ranges from 110° to 130°. If the angle is less than 110°, the connecting rod 230 is prone to plastic deformation under pressure at both ends; if the angle is greater than 130°, the connecting rod 230 is likely to contact the right side wall of the monitoring component housing 210's opening. In other embodiments, the connecting rod body 232 can also adopt other shapes, such as a straight rod structure or an S-shaped structure, as long as the connecting rod body 232 can avoid contact with the right side wall of the monitoring component housing 210's opening when moving upwards and to the left.

[0035] When the monitoring wrench 220 is turned to the open position, that is, when the monitoring wrench 220 is in the open state, Figure 4 In the right-hand position, the line connecting the axes of the first rotating shaft end 234 and the second rotating shaft end 236 is lower than the axis of the first positioning shaft 211. This allows the connecting rod 230 to form a self-locking state with the reverse pushing force of the monitoring wrench 220 and the restoring force of the wrench torsion spring 228 when the monitoring wrench 220 rotates to the open position, thus locking the monitoring wrench 220. The opening position of the monitoring wrench 220 corresponds to the closed state of the backup protection component 100. When the monitoring wrench 220 is subjected to the opening force of the backup protection component 100, it rotates away from the open position, causing the first rotating shaft end 234 of the connecting rod 230 to rotate upwards. This releases the self-locking state between the reverse pushing force of the connecting rod 230 and the restoring force of the wrench torsion spring 228. Under the combined action of the restoring force of the wrench torsion spring 228 and the reverse pushing force of the connecting rod 230, the monitoring wrench 220 quickly rotates to the closed position. Figure 4 The left-hand position indicates that the monitoring wrench 220 is in the closed state. In this invention, the distance X between the center of the first positioning shaft 211 and the line connecting the centers of the first rotating shaft end 234 and the second rotating shaft end 236 is within the range of 1-2 mm. If X is less than 1 mm, the distance is too close, the locking state of the monitoring wrench 220 is unstable, and even slight vibration may cause the monitoring wrench 220 to disengage; if X is greater than 2 mm, the required opening force is too large, affecting the smoothness of the linkage between the backup protection component 100 and the monitoring component 200.

[0036] The lever 240 includes a first support rod 242 and a second support rod 244. The first support rod 242 is connected to the second support rod 243, with the first support rod 242 positioned above the second support rod 243. The first support rod 242 includes an upper end 2421, a lever positioning hole 2422, and a connecting rod limiting groove 2424. The upper end 2421 is located at the top of the first support rod 242, the lever positioning hole 2422 is positioned slightly above the middle of the first support rod 242, and the connecting rod limiting groove 2424 is located within the upper end 2421. The lever positioning hole 2422 is fitted onto a second positioning shaft 213, allowing the lever 240 to rotate around the second positioning shaft 213. The connecting rod limiting groove 2424 is located above the lever positioning hole 2422 and has a slot of a preset length so that the second rotating shaft end 236 can be movably fitted into the connecting rod limiting groove 2424. When the second rotating shaft end 236 moves left and right, it pushes and pulls the two end walls of the connecting rod limiting groove 2424 to drive the upper end 2421 of the lever 240 to move left and right.

[0037] The second support rod 244 includes a lower end 2441, a sleeve shaft 2442, a sinking platform 2443, a first limiting shaft 2444, and a second limiting shaft 2446. The lower end 2441 and the upper end 2421 are respectively located at the upper and lower ends of the lever 240. The first distance between the lower end 2441 and the lever positioning hole 242 is greater than the second distance between the upper end 2421 and the lever positioning hole 242, thus enabling the upper end 2421 of the lever 240 to move a small distance left or right, thereby driving the lower end 2441 to move a larger distance left or right in the opposite direction. The sleeve shaft 2442 is located on the side of the second support rod 244 facing the third positioning shaft 215. The first end of the tension spring 250 is sleeved on the sleeve shaft 2442, and the second end is sleeved on the third positioning shaft 215, so as to elastically connect the second support rod 244 to the monitoring component housing 210. The sinking platform 2443 is located on the side of the second support rod 244 facing the signal transmission component 260. The sunken platform 2443 is provided with two adjacent first limiting shafts 2444 and second limiting shafts 2446. Both the first limiting shafts 2444 and the second limiting shafts 2446 extend toward the first side of the linkage rod 240, and a spring-loaded limiting gap 2449 is sandwiched between them.

[0038] See in combination Figure 7 , 8 The signal transmission component 260 includes a first terminal 262, a second terminal 264, a third terminal 266, and a switch spring 268. The first terminal 262, second terminal 264, and third terminal 266 are arranged sequentially from top to bottom, with air gaps between them. The fixed end of the switch spring 268 is fixedly connected to the first contact 2622 of the first terminal 262, and the free end switches between the second terminal 264 and the third terminal 266, thereby switching between a first connection circuit between the first terminal 262 and the second terminal 264 and a second connection circuit between the first terminal 262 and the third terminal 266. The second contact 2642 of the second terminal 264 and the third contact 2662 of the third terminal 266 are arranged adjacent to each other at intervals.

[0039] See in combination Figure 9The middle portion of the switch spring 268 is clamped in the spring limiting gap 2449 between the first limiting shaft 2444 and the second limiting shaft 2446 of the lever 240. As the lever 240 moves back and forth, the first limiting shaft 2444 and the second limiting shaft 2446 alternately apply forces to the switch spring 268, wherein the first limiting shaft 2444 applies a pushing force to the switch spring 268, and the second limiting shaft 2446 applies a pulling force to the switch spring 268. The free end of the switch spring 268 is movably clamped between the second connecting contact 2642 and the third connecting contact 2662, and as the first limiting shaft 2444 and the second limiting shaft 2446 alternately apply forces to the switch spring 268, the free end of the switch spring 268 switches between contacting the second connecting contact 2642 and contacting the third connecting contact 2662. The free end of the switch spring 268 is provided with a spring contact 2682 to better connect the second contact 2642 and the third contact 2662.

[0040] See in combination Figure 1-3 When the backup protection component 100 is closed, the tripping mechanism wrench 120 rotates to the second position, that is, the tripping mechanism wrench 120 is pulled towards the lower side of the backup protection housing 110; the monitoring wrench 220 rotates to the open position along with the tripping mechanism wrench 120, that is... Figure 4 As shown on the right side; the reverse pushing force of the connecting rod 230 on the monitoring wrench 220 and the restoring force of the wrench torsion spring 228 form a self-locking state, and the monitoring wrench 220 is in a locked state at this time; the tension spring 250 is stretched to generate a restoring force; the spring contact 2682 of the switch spring 268 abuts against the third connecting contact 2662 of the third terminal 266; the second connection circuit between the first terminal 262 and the third terminal 266 is connected. When the backup protection component 100 is tripped, the tripping mechanism wrench 120 rotates to the first position, that is, the tripping mechanism wrench 120 is pulled towards the upper side of the backup protection housing 110; the monitoring wrench 220 rotates to the closed position along with the tripping mechanism wrench 120, that is... Figure 4 As shown in the left position; the monitoring wrench 220 rotates around the first positioning shaft 211, causing the first rotating shaft end 234 of the connecting rod 230 to move to the upper left, and then pulls the left end wall of the limiting groove 2424 of the lever 240 through the second rotating shaft end 236, causing the upper end 2421 of the lever 240 to move to the left and the lower end 2441 to move to the right, so that the spring contact 2682 of the switch spring 2466 abuts against the second connecting contact 2642 of the second terminal 264; the first connection circuit between the first terminal 262 and the second terminal 264 is connected.

[0041] This invention provides a backup protector 999. Through a mechanical linkage structure between the backup protection component 100 and the monitoring component 200, the closing and opening actions of the backup protection component 100 are synchronously transmitted to the monitoring component 200. A corresponding electrical signal is output through the signal transmission component 260, thereby achieving synchronous conversion between the mechanical state of the backup protector 999 and external monitoring signals, improving the accuracy and reliability of the backup protector 999's state monitoring. Specifically, the monitoring wrench 220 is inserted into the mounting hole 122 of the tripping mechanism wrench 120 via a convex shaft 222, allowing the tripping mechanism wrench 120 to directly drive the monitoring wrench 220 to rotate synchronously. Simultaneously, the monitoring component housing 210 engages with the mounting groove 112 on the backup protection housing 110 via a hook 212 and with the slot 114 via a snap-fit ​​component 214, enabling the monitoring component 200 to be stably and conveniently installed on one side of the backup protection component 100. This achieves the state monitoring function without altering the main internal tripping structure of the backup protection component 100.

[0042] Furthermore, the core technical effect of this invention lies in the fact that, through the multi-stage mechanical linkage structure formed between the monitoring wrench 220, connecting rod 230, lever 240, tension spring 250, and signal transmission component 260, the small-amplitude rotation of the monitoring wrench 220 is converted into a more significant lateral displacement of the switch spring 268, thereby reliably driving the switch spring 268 to switch between the second terminal 264 and the third terminal 266, realizing a reliable switch between the first connection circuit and the second connection circuit. Specifically, the distance between the lower end 2441 of the lever 240 and the lever positioning hole 2422 is greater than the distance between the upper end 2421 and the lever positioning hole 2422, creating a displacement amplification structure for the lever 240. Therefore, a small displacement generated by the monitoring wrench 220 and connecting rod 230 can drive the switch spring 268 to generate a large switching displacement, which helps to increase the switching margin between the switch spring 268 and the second or third contact head 2642, reducing unreliable signal switching problems caused by mechanical clearance, assembly errors, or insufficient travel.

[0043] Furthermore, the connecting rod 230 adopts a V-shaped connecting rod structure, with the V-shaped opening facing the opening of the monitoring component housing 210. This allows the connecting rod body 232 to create clearance space when the first rotating shaft end 234 moves to the upper left with the monitoring wrench 220, thereby preventing interference between the connecting rod 230 and the side wall at the opening of the monitoring component housing 210. This ensures the linkage stroke while improving the smoothness of the movement between the monitoring wrench 220 and the connecting rod 230. The included angle of the V-shaped opening is set to 110° to 130°, which can balance the movement space and structural strength of the connecting rod 230 within the compact monitoring component housing 210, reducing the possibility of jamming during linkage.

[0044] Furthermore, when the monitoring wrench 220 is rotated to the open position corresponding to the closed state of the backup protection component 100, the axis connecting the first rotating shaft end 234 and the second rotating shaft end 236 of the connecting rod 230 forms a specific over-center position relationship relative to the first positioning shaft 211, and the distance X between the axis of the first positioning shaft 211 and the axis connecting line is set to 1mm to 2mm, so that the reverse force formed by the connecting rod 230 on the monitoring wrench 220 and the restoring force of the wrench torsion spring 228 form a stable self-locking state, thereby enabling the monitoring wrench 220 to remain in the open position. Therefore, when the backup protection component 100 is in the closed state, the risk of the monitoring wrench 220 disengaging from the open position due to vibration, impact, or elastic restoring force can be reduced. When the backup protection component 100 performs a tripping action, after the monitoring wrench 220 passes the aforementioned equilibrium position, the self-locking state can be quickly released, and under the combined action of the wrench torsion spring 228 and the connecting rod 230, it can quickly rotate to the closed position, thereby improving the reliability of maintaining the closed state and switching the tripping state. By limiting X to the range of 1mm to 2mm, a better balance can be achieved between locking stability and tripping driving force, avoiding the problems of unstable locking due to too small a distance or increased resistance to tripping operation due to too large a distance.

[0045] Meanwhile, the present invention forms a spring-limiting gap 2449 through the first limiting shaft 2444 and the second limiting shaft 2446 on the lever 240, so that the middle part of the switch spring 268 is located between the first limiting shaft 2444 and the second limiting shaft 2446. The first limiting shaft 2444 and the second limiting shaft 2446 respectively apply pushing and pulling forces to the switch spring 268, enabling the switch spring 268 to switch bidirectionally between the second connecting contact 2642 and the third connecting contact 2662. Compared with a structure that relies solely on unidirectional pushing of the switch spring 268, the present invention can simultaneously utilize the first limiting shaft 2444 and the second limiting shaft 2446 to control the direction of the switch spring 268, giving the switch spring 268 a clear mechanical driving relationship between the two connection states, thus improving the operational certainty of the signal transmission component 260 and the reliability of contact switching.

[0046] Although descriptions and illustrations of relevant embodiments of the present invention have been given, those skilled in the art should understand that these descriptions and illustrations do not constitute a limitation on the scope of the present invention. Various changes in form and detail can be made to the present invention without departing from the concept and scope thereof. Therefore, the scope of this disclosure is not limited to the above embodiments, but should be determined by the claims and their equivalents.

Claims

1. A monitoring component for a backup protector, the backup protector including a tripping mechanism wrench, characterized in that, The monitoring component includes a monitoring component housing, a monitoring wrench, and a connecting rod; The monitoring wrench is rotatably mounted on the monitoring component housing and extends through an opening on one side of the monitoring component housing. It is connected to the tripping mechanism wrench so that it rotates with the tripping mechanism wrench between the open position corresponding to the closed state of the backup protector and the closed position corresponding to the open state of the backup protector. The monitoring component housing is provided with a first positioning shaft, and the monitoring wrench includes a wrench positioning hole, a first connecting rod positioning hole and a wrench torsion spring. The wrench positioning hole is sleeved on the first positioning shaft so that the monitoring wrench can rotate around the first positioning shaft. The connecting rod includes a connecting rod body and a first rotating shaft end and a second rotating shaft end respectively disposed at both ends of the connecting rod body. The first rotating shaft end is rotatably sleeved in the first connecting rod positioning hole so as to rotate around the first positioning shaft with the monitoring component. When the monitoring wrench is rotated to the open position corresponding to the closed state of the backup protector, the axis connecting the first shaft end and the second shaft end is located below the axis of the first positioning shaft, so that the reverse pushing force of the connecting rod on the monitoring wrench and the restoring force of the wrench torsion spring form a self-locking state, thereby keeping the monitoring wrench in the open position.

2. The monitoring component according to claim 1, characterized in that: The wrench torsion spring is arranged around the wrench positioning hole. One end of the wrench torsion spring is fixed to the monitoring wrench, and the other end is fixed to the inner wall of the monitoring component housing to provide the restoring force to the monitoring wrench.

3. The monitoring component according to claim 1, characterized in that: The distance X between the axis of the first positioning shaft and the line connecting the axes of the first rotating shaft end and the second rotating shaft end is 1mm to 2mm.

4. The monitoring component according to claim 1, characterized in that: The main body of the connecting rod is a V-shaped connecting rod structure, with the opening of the V-shaped connecting rod structure facing the opening of the monitoring component housing, so as to form a clearance space when the first rotating shaft end moves with the monitoring wrench, thereby avoiding the main body of the connecting rod from colliding with the side wall of the opening of the monitoring component housing, and the included angle of the opening of the V-shaped connecting rod structure is 110° to 130°.

5. The monitoring component according to claim 1, characterized in that: The monitoring component also includes a lever, and the housing of the monitoring component is further provided with a second positioning shaft. The lever is provided with a lever positioning hole and a connecting rod limiting groove. The lever positioning hole is sleeved on the second positioning shaft so that the lever can rotate around the second positioning shaft. The second rotating shaft end is movably disposed in the connecting rod limiting groove so that the lever can rotate when the second rotating shaft end moves.

6. The monitoring component according to claim 5, characterized in that: The lever includes a first support and a second support connected to each other, with the first support located above the second support. The first support rod includes an upper end, a lever positioning hole, and a connecting rod limiting groove, with the connecting rod limiting groove disposed at the upper end; the second support rod includes a lower end, with a first distance between the lower end and the lever positioning hole being greater than a second distance between the upper end and the lever positioning hole, so that when the upper end of the lever moves a small distance to the left or right, it drives the lower end of the lever to move a large distance to the left or right in the opposite direction.

7. The monitoring component according to claim 6, characterized in that: The monitoring component also includes a tension spring and a signal transmission component, and the housing of the monitoring component also includes a third positioning shaft; The second support rod also includes a sleeve shaft, a sinking platform, a first limiting shaft and a second limiting shaft. The sleeve shaft is disposed on the side of the second support rod facing the third positioning shaft. One end of the tension spring is sleeved on the sleeve shaft and the other end is sleeved on the third positioning shaft. The sinking platform is located on the side of the second support rod facing the signal transmission component. The first limiting shaft and the second limiting shaft are located on the sinking platform, and a spring-loaded limiting gap is formed between the first limiting shaft and the second limiting shaft.

8. The monitoring component according to claim 7, characterized in that: The signal transmission component includes a first terminal, a second terminal, a third terminal, and a switch spring; The first terminal, the second terminal, and the third terminal are arranged sequentially from top to bottom and are separated by air gaps. The fixed end of the switch spring is fixedly connected to the first terminal, the middle part of the switch spring is disposed in the spring limiting gap, and the free end of the switch spring is located between the second terminal and the third terminal, so that when the lever is rotated, it switches between contacting the second terminal and contacting the third terminal.

9. A backup protector, characterized in that, Includes a backup protection component and a monitoring component as described in any one of claims 1-8; The backup protection assembly also includes a backup protection housing and the tripping mechanism wrench. The tripping mechanism wrench extends through an opening on one side of the backup protection housing and is rotatably configured relative to the backup protection housing. The monitoring component is disposed on one side of the backup protection component, and the monitoring wrench is throttle-connected to the tripping mechanism wrench so that the monitoring wrench rotates with the tripping mechanism wrench; The tripping mechanism wrench has a mounting hole on the side facing the monitoring component, and the monitoring wrench has a convex shaft on the side facing the tripping mechanism wrench, which is inserted into the mounting hole.

10. The backup protector according to claim 9, characterized in that: The backup protective housing is provided with two hook slots and one slot. The two hook slots are respectively provided on the two sides of the backup protective housing adjacent to the side where the release mechanism wrench is located. The slot is provided on the side of the backup protective housing opposite to the side where the release mechanism wrench is located. The monitoring component housing is provided with two hooks and one snap-fit ​​component. The two hooks are respectively hooked into the two hook slots, and the snap-fit ​​component is respectively snapped into the snap-fit ​​slots.

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