Surge protector

Abstract

The application discloses a surge protector and relates to the technical field of overvoltage protection devices. The surge protector comprises a first disconnection unit and a second disconnection unit in series. The first disconnection unit comprises a first pole piece of a pressure-sensitive resistor and an electrode piece electrically connected with an incoming line end, and the first pole piece and the electrode piece are connected by soldering to form a first breaking point. The second disconnection unit comprises a second pole piece of the pressure-sensitive resistor, a moving contact electrically connected with an outgoing line end and a disconnection mechanism, the moving contact is in contact with the second pole piece to form a second breaking point, the disconnection mechanism comprises a sliding block and an elastic piece, the electrode piece is fixed to the sliding block, and the sliding block is provided with a striker. When a surge occurs in a circuit, the soldering is melted to disconnect the first breaking point, the sliding block is slid under the action of the elastic piece, and the striker pushes the moving contact to separate from the second pole piece to disconnect the second breaking point. The surge protector provided by the application can improve the breaking capacity of the surge protector and reduce the risk of electrical accidents caused by untimely breaking.

Description

Technical Field

[0001] This application relates to the field of overvoltage protection equipment technology, specifically to a surge protector. Background Technology

[0002] Current surge protectors (SPDs) generally adopt a single-break structure. The core protection component, a varistor (MOV), is soldered to the electrode using low-temperature solder and then disengaged by a spring. When a surge occurs in the circuit, the varistor absorbs energy and heats up, melting the low-temperature solder. The spring then releases its elastic force, causing the varistor to separate from the electrode and cut off the circuit to achieve protection.

[0003] However, this solution has safety hazards. During the low-temperature solder melting process, wire drawing is likely to occur, which may cause the varistor to not be completely separated from the electrode. The current cannot be disconnected in time, which may lead to overcurrent, burn out the surge protector, or even induce circuit failure. It is difficult to meet the requirements of high reliability protection.

[0004] Therefore, there is an urgent need to propose a surge protector to solve the problems existing in the current technology. Summary of the Invention

[0005] The purpose of this application is to provide a surge protector that can improve the breaking capacity of the surge protector and reduce the risk of electrical accidents caused by untimely breaking.

[0006] This application provides a surge protector, including a first disconnect unit and a second disconnect unit connected in series. The first disconnect unit includes a first electrode of a varistor and an electrode plate electrically connected to the input terminal. The first electrode and the electrode plate are connected by solder to form a first break point. The second disconnect unit includes a second electrode of a varistor, a moving contact electrically connected to the output terminal, and a disconnect mechanism. The moving contact contacts the second electrode to form a second break point. The disconnect mechanism includes a slider and an elastic element. The electrode plate is fixed to the slider, and the slider is equipped with a striker. When a surge occurs in the circuit, the solder melts, causing the first break point to open. The slider slides under the action of the elastic element, and the striker pushes the moving contact to separate from the second electrode, thus opening the second break point.

[0007] Through the above solution, on the one hand, the solder melting triggering mechanism of the first release unit achieves a rapid response to surge current, providing an accurate trigger signal for the action of the second release unit. On the other hand, even if the first release unit fails to completely disconnect due to problems such as solder wire pulling or adhesion, the second release unit can still forcibly cut off the circuit under the linkage of the elastic element and the striker, effectively avoiding safety hazards such as product burnout and short circuit caused by single-point failure.

[0008] In some examples, the surge protector also includes a housing with a groove, the beginning of which is close to the first electrode and the end of which is close to the moving contact. A slider is slidably mounted in the groove, and an elastic element elastically connects the slider and the end of the groove.

[0009] The groove on the housing can effectively limit the position and movement direction of the slider and electrode, avoiding delays or jamming in the separation action of the electrode and the first electrode due to assembly errors or deviations in the movement direction. It ensures that the electrode can move smoothly along the preset trajectory with the slider after the solder is desoldered, reducing the risk of protection failure caused by component jamming, improving the reliability of the disengagement mechanism, and effectively enhancing the stability of the surge protector's protection response when a fault occurs.

[0010] Furthermore, the slide includes a first side plate and a second side plate arranged in parallel and spaced apart, and a limiting plate located between the two. The opposite side walls of the slider are slidably engaged with the first side plate and the second side plate, respectively. The slider is provided with a limiting groove adapted to the limiting plate, and the limiting plate can be embedded in the limiting groove to form a limiting engagement.

[0011] The first and second side plates, as the main structures of the slide groove, are arranged parallel to each other on the inner wall of the housing. They are characterized by simple structure and high strength, and can cooperate with the opposite side walls of the slider to limit the slider's offset in the direction perpendicular to the sliding direction, ensuring that the slider always slides along the preset trajectory. At the same time, the cooperation between the limiting plate and the limiting groove can further limit the slider's wobbling or offset, keeping the slider in the middle of the slide groove and preventing the slider from sliding and getting stuck due to tilting.

[0012] In some examples, the end of the chute is provided with a stop, which is located between the first side plate and the limiting plate, and between the second side plate and the limiting plate.

[0013] The stop block can provide precise limit on the sliding stroke of the slider, preventing the slider from disengaging from the end of the groove due to excessive energy release of the elastic element. This helps to improve the accuracy and reliability of the slider's movement and enhance the functional stability of the disengagement mechanism.

[0014] In some examples, the slider has a first connecting post on the side away from the bottom of the groove, and the limiting plate has a second connecting post. The first and second connecting posts are parallel, and the two ends of the elastic element are connected to the first and second connecting posts respectively.

[0015] The first and second connecting posts are collinearly arranged in the sliding direction of the slider, which ensures that the driving force provided by the elastic element to the slider is always along the direction of the slider sliding along the groove, avoiding the slider from getting stuck in the groove due to force deviation, and thus improving the reliability of the disengagement mechanism.

[0016] In some examples, the electrode sheet includes an integrally formed body and a side plate. The body has an assembly hole adapted to the first connecting post. The body is fixed to the first connecting post through the assembly hole. The slider has a snap-fit ​​groove on the side near the starting end of the slide groove. The side plate is snap-fitted and fixed to the snap-fit ​​groove.

[0017] The main body of the electrode plate is fitted with the first connecting post through the mounting hole, achieving a stable mechanical connection with the slider without the need for additional fasteners. This simplifies the assembly process and ensures that the slider can smoothly move the electrode plate away from the first electrode plate. The engagement between the side plate of the electrode plate and the slider's locking groove further provides lateral fixing force, effectively preventing the electrode plate from tilting or loosening during sliding or circuit vibration. This double fixing structure significantly improves the connection stability and synchronization of the electrode plate and the slider.

[0018] In some examples, the firing pin is integrally formed on the side of the slider facing the moving contact, and the firing pin extends along the sliding direction of the slider.

[0019] The striker is integrated onto the slider to provide sufficient structural strength. Furthermore, the striker extends along the sliding direction of the slider, allowing the linear motion of the slider to be directly converted into axial thrust of the striker onto the moving contact, thus improving the reliability of triggering the second break point.

[0020] In some examples, the surge protector also includes a latch and a trip latch that interlock with each other. The trip latch is linked to the moving contact. The latch has a receiving part corresponding to the striker. When the slider slides, the striker pushes against the receiving part to unlock the latch and the trip latch. The trip latch then causes the moving contact to separate from the second electrode.

[0021] The moving contact separates from the second electrode by unlocking the latch and the trip latch. On the one hand, the stable engagement of the latch and the trip latch prevents the moving contact from accidentally disengaging due to vibration or other factors during normal operation. On the other hand, the force transmission design of the striker and the receiving part ensures that the unlocking action is fast and without jamming, making the separation process of the moving contact from the second electrode efficient and controllable. This further ensures the redundancy and safety of the dual-disengagement protection and reduces the circuit risk caused by the failure of a single disengagement mechanism.

[0022] In some examples, the side of the receiving part closest to the firing pin is set as a curved surface.

[0023] When the striker moves linearly with the slider to push against the receiving part, the arc surface design can smoothly convert the axial linear thrust applied by the striker into a rotational torque that drives the latch to rotate around its own axis, avoiding the jamming and sticking problems that may occur in planar contact, and ensuring that the force transmission is lossless and does not deviate.

[0024] In some examples, a remote signaling switch is also included, which is located on the movement path of the moving contact away from the second pole, and the moving contact can push the remote signaling switch to start.

[0025] By employing a combination of a remote signaling switch and a moving contact, the system allows for rapid determination of whether the protector has been triggered by a surge, eliminating the need for manual disassembly and testing. This facilitates timely troubleshooting of circuit faults and replacement of faulty components. Furthermore, the triggering of the remote signaling switch and the disconnection of the second breakpoint occur simultaneously, ensuring the accuracy of the feedback signal and preventing misjudgments due to a single disconnection unit malfunction. Attached Figure Description

[0026] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is a schematic diagram of the surge protector in the closed state provided in the embodiment of this application.

[0028] Figure 2 This is a schematic diagram of the surge protector in the open state provided in the embodiment of this application.

[0029] Figure 3 An exploded view of the thermal detachment mechanism provided in an embodiment of this application.

[0030] Figure 4 Provided for the embodiments of this application Figure 3 Enlarged view of section B in the middle.

[0031] Figure 5 Provided for the embodiments of this application Figure 2 Sectional view at point AA.

[0032] Figure 6 This is a schematic diagram of the assembly of the slider and electrode sheet provided in an embodiment of this application.

[0033] Explanation of reference numerals in the attached drawings: 100, surge protector; 200, first disconnection unit; 300, second disconnection unit; 400, disconnection mechanism; 1, housing; 11, slide groove; 111, first side plate; 112, second side plate; 113, limiting plate; 114, stop block; 115, second connecting post; 2, varistor; 21, first electrode; 22, second electrode; 3, slider; 31, limiting groove; 32, first connecting post; 33, snap-fit ​​groove; 34, striking pin; 4, elastic element; 5, electrode plate; 51, main body; 511, mounting hole; 52, side plate; 6, moving contact; 7, latch; 71, receiving part; 8, trip latch; 9, remote signaling switch. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0035] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0036] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0037] In the description of this application, it should be noted that the terms "inner" and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use. They are used only for the convenience of describing this application and for 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 application. Furthermore, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0038] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "setup" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0039] Existing surge protectors typically employ a single-break structure design. Specifically, the core protection component, a varistor, is soldered to the electrode using low-temperature solder. When a surge occurs in the circuit, the varistor absorbs energy and heats up, causing the low-temperature solder to melt. This, combined with a spring drive, separates the varistor from the electrode, cutting off the circuit to achieve protection.

[0040] However, during the process of separating the varistor and the electrode, the molten solder is prone to wire drawing, which makes it impossible for the varistor and the electrode to be completely separated. The current cannot be disconnected in time, which in turn causes overcurrent, burns out the surge protector, and may even induce circuit faults, making it difficult to meet the requirements of high reliability protection.

[0041] Based on this, the present application provides a surge protector that can improve the breaking capacity of the surge protector and reduce the risk of electrical accidents caused by untimely breaking.

[0042] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings.

[0043] Reference Figure 1 and Figure 2 This embodiment provides a surge protector 100, including a first disconnection unit 200 and a second disconnection unit 300 connected in series. The first disconnection unit 200 includes a first electrode 21 of a varistor 2 and an electrode 5 electrically connected to the input terminal. The first electrode 21 and the electrode 5 are connected by solder to form a first break point. The second disconnection unit 300 includes a second electrode 22 of the varistor 2, a moving contact 6 electrically connected to the output terminal, and a disconnection mechanism 400. The moving contact 6 contacts the second electrode 22 to form a second break point. The disconnection mechanism 400 includes a slider 3 and an elastic element 4. The electrode 5 is fixed to the slider 3, and the slider 3 is provided with a striker 34. When a surge occurs in the circuit, the solder melts, causing the first break point to open. The slider 3 slides under the action of the elastic element 4, and the striker 34 pushes the moving contact 6 to separate from the second electrode 22, thereby opening the second break point.

[0044] Through the above solution, on the one hand, the solder melting triggering mechanism of the first disconnection unit 200 achieves a rapid response to surge current, providing an accurate trigger signal for the action of the second disconnection unit 300. On the other hand, even if the first disconnection unit 200 fails to completely disconnect due to problems such as solder wire pulling or adhesion, the second disconnection unit 300 can still forcibly cut off the circuit under the linkage of the elastic element 4 and the striker 34, effectively avoiding safety hazards such as product burnout and short circuit caused by single-point failure.

[0045] Reference Figure 1 and Figure 2 The first disconnection unit 200 serves as the first stage of protection for the surge protector 100. Its core components include the first electrode 21 of the varistor 2 and the electrode plate 5. The electrode plate 5 is directly electrically connected to the input terminal, ensuring that the surge current can flow directly through the varistor 2. The first electrode 21 and the electrode plate 5 are fixedly connected by low-temperature solder. This solder can maintain a stable connection under normal operating conditions, ensuring the reliability of circuit conduction.

[0046] Meanwhile, the melting point setting of the low-temperature solder is matched with the thermal response characteristics of the varistor 2. When a surge current occurs in the circuit, causing the temperature of the varistor 2 to rise, the low-temperature solder can melt in time to break the electrical connection between the electrode plate 5 and the first electrode plate 21, thereby breaking the first break point and preventing the surge current from causing damage to the circuit or equipment.

[0047] Reference Figure 1 and Figure 2 The second disconnection unit 300 serves as the second level of protection for the surge protector 100. Its main components include the second electrode 22 of the varistor 2, the moving contact 6, and the disconnection mechanism 400. The moving contact 6 is electrically connected to the output terminal. In the closed state, the moving contact 6 is in close contact with the second electrode 22, forming a conductive circuit with the first electrode 21, the electrode plate 5, and the input terminal.

[0048] The slider 3 and electrode 5 in the disengagement mechanism 400 are fixedly installed as one unit. Specifically, the fixed connection can be achieved by snap-fit, plug-in or adhesive. These connection methods can ensure that the electrode 5 and slider 3 form a stable integrated structure, ensure the synchronization of the action, and facilitate the slider 3 to move the electrode 5 away from the first electrode 21 in time when the solder melts, thereby reducing the risk that the electrode 5 and the first electrode 21 cannot be completely separated due to solder wire pulling.

[0049] The elastic element 4 can maintain an energy storage state when the circuit is in a normal state and apply elastic force to the slider 3 so that the slider 3 and the electrode plate 5 mounted on the slider 3 can move away from the first electrode plate 21 at the moment the solder melts. This is beneficial to improving the breaking speed of the first break point and reducing the risk of the circuit being damaged by surge current.

[0050] Reference Figure 1 and Figure 2 The striker 34 on the slider 3 corresponds to the position of the moving contact 6. After the first break point is broken, the slider 3 can push the contact 6 through the striker 34 during the sliding process, so that the moving contact 6 is separated from the second electrode 22, thereby cutting off the second break point. This effectively improves the reliability of circuit breaking. Even if the first break point cannot completely disconnect the circuit due to solder wire pulling, the circuit can still be completely disconnected through the synchronous breaking of the second break point, reducing the risk of residual conduction under surge faults.

[0051] Reference Figure 1 and Figure 2 In some examples, the surge protector 100 also includes a housing 1, which has a groove 11. The starting end of the groove 11 is close to the first electrode 21, and the end of the groove 11 is close to the moving contact 6. The slider 3 is slidably mounted in the groove 11, and the elastic element 4 elastically connects the slider 3 and the end of the groove 11.

[0052] The groove 11 on the housing 1 can effectively limit the position and movement direction of the slider 3 and the electrode 5, avoid delays or jamming in the separation action of the electrode 5 from the first electrode 21 due to assembly errors or deviations in the movement direction, ensure that the electrode 5 can move smoothly along the preset trajectory with the slider 3 after the solder is desoldered, reduce the risk of protection failure caused by component jamming, improve the operational reliability of the disengagement mechanism 400, and effectively enhance the protection response stability of the surge protector 100 when a fault occurs.

[0053] Among them, reference Figure 1 and Figure 2 The housing 1 serves as the main support 51 of the surge protector 100, providing a stable space for components such as the varistor 2, slider 3, elastic element 4, and electrode sheet 5. The groove 11 provided on the inner wall of the housing 1 can be a groove structure directly opened on the inner wall of the housing 1, or it can be formed by two parallel ridges protruding from the inner wall of the housing 1. Both structural forms can form a stable sliding guide structure.

[0054] The extension direction of the groove 11 is consistent with the preset sliding trajectory of the slider 3, that is, it extends from the position near the first electrode 21 of the varistor 2 (the starting end of the groove 11) to the position near the moving contact 6 (the ending end of the groove 11). In addition, the length of the groove 11 meets the maximum stroke of the slider 3, ensuring that the slider 3 can completely separate the electrode 5 and the first electrode 21 when sliding from the starting end to the ending end of the groove 11, thus ensuring the effective separation of the first break point.

[0055] Furthermore, referring to Figure 1 and Figure 2 The elastic element 4 can be a tension spring, which is connected between the slider 3 and the end of the groove 11. When the circuit is working normally, the slider 3 is located at the beginning of the groove 11, the electrode plate 5 is located at the same position as the slider 3 and is connected to the first electrode plate 21 by solder, and the tension spring is in a tensioned energy storage state at this time.

[0056] When a surge occurs in the circuit and causes the solder to melt, the elastic force applied by the elastic element 4 to the slider 3 is greater than the residual connection force between the electrode 5 and the first electrode 21. Under the action of the elastic force, the slider 3 will slide towards the end of the groove 11 and drive the electrode 5 away from the first electrode 21, so that the molten solder is completely disconnected, avoiding the situation where the solder wires are pulled and the electrode 5 and the first electrode 21 are still conducting, thus improving the reliability of the surge protector.

[0057] Furthermore, referring to Figures 1 to 4The slide 11 includes a first side plate 111 and a second side plate 112 arranged in parallel and spaced apart, and a limiting plate 113 located between the two. The two opposite side walls of the slider 3 are respectively slidably engaged with the first side plate 111 and the second side plate 112, and the slider 3 is provided with a limiting groove 31 adapted to the limiting plate 113. The limiting plate 113 can be embedded in the limiting groove 31 to form a limiting engagement.

[0058] The first side plate 111 and the second side plate 112, as the main structures of the slide groove 11, are arranged parallel to each other on the inner wall of the housing 1. They are characterized by simple structure and high strength, and can cooperate with the two side walls opposite to the slider 3 to limit the displacement of the slider 3 in the direction perpendicular to the sliding direction, ensuring that the slider 3 always slides along the preset trajectory. At the same time, the cooperation between the limiting plate 113 and the limiting groove 31 can further limit the shaking or displacement of the slider 3, so that the slider 3 is in the middle of the slide groove 11, and avoids the slider 3 from sliding and getting stuck due to tilting.

[0059] Specifically, refer to Figures 3 to 5 The first side plate 111 and the second side plate 112 are arranged parallel and spaced apart. The distance between the first side plate 111 and the second side plate 112 is adapted to the width of the slider 3, and the slider 3 maintains a clearance fit between the first side plate 111 and the second side plate 112 to facilitate smooth sliding between them. The protrusion height of the first side plate 111 and the second side plate 112 based on the inner wall of the housing 1 is at least greater than 1 / 2 of the height of the slider 3, so as to provide stable support for the slider 3, reduce the risk of the slider 3 disengaging from the slide groove 11, and improve the assembly stability of the disengagement mechanism 400. In addition, the first side plate 111, the second side plate 112 and the limiting plate 113 are integrally formed on the housing 1. The first side plate 111, the second side plate 112 and the limiting plate 113 are all vertically protruding based on the inner wall of the housing 1, which is simple in structure and easy to process.

[0060] The limiting plate 113 is arranged parallel to the first side plate 111 and the second side plate 112. Specifically, it can be located near the midpoint of the distance between the first side plate 111 and the second side plate 112. The length of the limiting plate 113 is shorter than that of the first side plate 111 and the second side plate 112. The limiting plate 113 extends from the middle of the slide groove 11 to the end of the slide groove 11.

[0061] Reference Figures 3 to 5 The limiting groove 31 is opened on the side of the slider 3 facing the end of the slide groove 11. The shape and size of the limiting groove 31 are matched with the limiting plate 113. In this embodiment, the limiting plate 113 is a rectangular plate structure, and the limiting groove 31 is a rectangular groove structure. The thickness of the limiting plate 113 and the height of the protrusion based on the inner wall of the shell 1 are matched with the width and depth of the limiting groove 31.

[0062] As the slider 3 slides towards the end of the slide groove 11, the limiting groove 31 can be inserted into the limiting plate 113, so that the limiting plate 113 can provide further limiting and support for the slider 3. Alternatively, when the circuit is in normal condition, the slider 3 is at the first end of the slide groove 11, at which time the limiting groove 31 and the limiting plate 113 are partially inserted together. In this way, from the moment the slider 3 starts to slide, the limiting plate 113 can limit the slider 3 by cooperating with the limiting groove 31, preventing the slider 3 from getting stuck or other problems during the initial sliding process. This helps to improve the timeliness and reliability of the slider 3 driving the electrode plate 5 to break the first break point.

[0063] In one optional embodiment, the inner sides of the first side plate 111 and the second side plate 112 are provided with protruding ridges extending along the sliding direction of the slider 3, and the two side walls of the slider 3 are provided with grooves that are adapted to the protruding ridges. The protruding ridges are embedded in the grooves to form a sliding guide fit (not shown in the figure).

[0064] For example, both the first side plate 111 and the second side plate 112 have a raised ridge along the extension direction of the slide groove 11 on the inner wall facing the slide groove 11. Correspondingly, the outer wall of the slider 3 has a groove that matches the raised ridge. After the raised ridge and the groove are assembled, the position and sliding direction of the slider 3 in the slide groove 11 can be further restricted, and the slide groove 11 can be prevented from sliding and getting stuck due to displacement.

[0065] It should be noted that the slider 3 can be designed as a hollow structure. The hollow design of the slider 3 can effectively reduce the weight of the slider 3 and reduce the resistance of the elastic element 4 when driving the slider 3, so that the slider 3 can slide along the groove 11 more quickly after the solder is desoldered, shorten the separation time of the electrode plate 5 and the first electrode plate 21, and improve the timeliness of the break.

[0066] The hollow part of the slider 3 is specifically hollowed out on the side of the slider 3 near the bottom of the slide groove 11, so that the slider 3 is U-shaped and inverted in the slide groove 11. This not only reduces the weight of the slider 3, but also ensures that the slider 3 can slide normally and stably in the slide groove 11. In addition, it can prevent local stress concentration of the slider 3, reduce wear between the slider 3 and the slide groove 11, and extend the service life.

[0067] Reference Figure 3 and Figure 4 In some examples, the end of the slide 11 is provided with a stop 114, which is located between the first side plate 111 and the limiting plate 113, and between the second side plate 112 and the limiting plate 113.

[0068] The setting of the stop block 114 can provide precise limit for the sliding stroke of the slider 3, and avoid excessive energy release of the elastic element 4, which would cause the slider 3 to disengage from the end of the slide groove 11. This is beneficial to improving the accuracy and reliability of the slider 3's movement and improving the functional stability of the disengagement mechanism 400.

[0069] The structure of the stop 114 is similar to that of the limiting plate 113. It is also a protruding structure on the inner wall of the shell 1, integrally formed with the shell 1, and has sufficient structural strength. While limiting the sliding position of the slider 3, it also has the characteristics of simple processing technology and low production cost.

[0070] Specifically, the stop block 114 is disposed at the end of the slide groove 11. In this embodiment, the stop block 114 is divided into two parts: one part of the stop block 114 is located between the first side plate 111 and the limiting plate 113, and the other part of the stop block 114 is located between the limiting plate 113 and the second side plate 112. When the slider 3 slides to the end of the slide groove 11, the side of the slider 3 facing the end of the slide groove 11 abuts against the stop block 114. At this time, the slider 3 moves to a preset position, and the electrode plate 5 is completely separated from the solder connection of the first electrode plate 21 under the action of the slider 3.

[0071] Reference Figure 3 and Figure 4 In some examples, the slider 3 is provided with a first connecting post 32 on the side opposite to the bottom of the slide groove 11, and the limiting plate 113 is provided with a second connecting post 115. The first connecting post 32 and the second connecting post 115 are parallel, and the two ends of the elastic member 4 are respectively connected to the first connecting post 32 and the second connecting post 115.

[0072] The first connecting post 32 and the second connecting post 115 are arranged collinearly in the sliding direction of the slider 3, which can ensure that the driving force provided by the elastic element 4 to the slider 3 can always be along the sliding direction of the slider 3 along the slide groove 11, avoiding the slider 3 from sliding and getting stuck in the slide groove 11 due to force deviation, which is beneficial to improving the reliability of the disengagement mechanism 400.

[0073] Specifically, refer to Figure 3 and Figure 4 The first connecting post 32 is located on the side of the slider 3 away from the bottom of the abutting groove 11, and the first connecting post 32 extends away from the slider 3 along the extension direction of the first side plate 111. The first connecting post 32 is integrally formed with the slider 3 to ensure that the first connecting post 32 has sufficient structural strength. The second connecting post 115 is disposed on the limiting plate 113. Similarly, the second connecting post 115 is located on the side of the limiting plate 113 away from the bottom of the groove 11, and the second connecting post 115 extends away from the limiting plate 113 along the extension direction of the limiting plate 113. The second connecting post 115 is integrally formed with the limiting plate 113 to ensure that the second connecting post 115 has sufficient structural strength.

[0074] In this embodiment, the elastic element 4 is a tension spring. The first end of the tension spring is attached to the first connecting post 32, and the second end of the tension spring is attached to the second connecting post 115. The first connecting post 32 and the second connecting post 115 are on the same straight line in the sliding direction of the slider 3. This ensures that the tension spring is also on this straight line, so that the elastic force provided by the tension spring is always in the direction of movement of the slider 3 along the slide groove 11. This ensures that the slider 3 can move smoothly along the slide groove 11, avoiding excessive friction or jamming between the slider 3 and the first side plate 111 or the second side plate 112 due to deviation in the force direction. This facilitates the smooth separation of the electrode plate 5 from the first electrode plate 21, improving the reliability of the disengagement mechanism 400.

[0075] Reference Figure 6 In some examples, the electrode sheet 5 includes an integrally formed main body 51 and side plate 52. The main body 51 is provided with an assembly hole 511 adapted to the first connecting post 32. The main body 51 is sleeved and fixed to the first connecting post 32 through the assembly hole 511. The slider 3 is provided with a snap-fit ​​groove 33 on the side near the starting end of the slide groove 11. The side plate 52 is snapped and fixed to the snap-fit ​​groove 33.

[0076] The main body 51 of the electrode plate 5 is fitted with the first connecting post 32 through the mounting hole 511, achieving a stable mechanical connection with the slider 3 without the need for additional fasteners. This simplifies the assembly process and ensures that the slider 3 can smoothly drive the electrode plate 5 away from the first electrode plate 21. The engagement between the side plate 52 of the electrode plate 5 and the locking groove 33 of the slider 3 further provides lateral fixing force, effectively preventing the electrode plate 5 from tilting or loosening during sliding or circuit vibration. This double fixing structure significantly improves the connection stability and synchronization of the electrode plate 5 and the slider 3.

[0077] The mounting hole 511 on the electrode plate 5 is adapted to the outer diameter of the first connecting post 32. During assembly, simply align the mounting hole 511 of the electrode plate 5 with the first connecting post 32 to complete the initial positioning. To further improve the connection reliability, an anti-detachment structure, such as an annular protrusion or a buckle, can be provided at the end of the first connecting post 32 to prevent the electrode plate 5 from falling off the connecting post during the sliding of the slider 3.

[0078] Meanwhile, this assembly structure, which uses the connecting post and the assembly hole 511, ensures that the installation position of the electrode sheet 5 is precisely aligned with the first connecting post 32. This indirectly guarantees the bonding accuracy between the electrode sheet 5 and the first electrode 21 of the varistor 2, preventing insufficient solder connection area due to electrode sheet 5 offset, which could lead to local overheating or abnormal desoldering. This provides a basic guarantee for the stable operation of the disengagement mechanism 400.

[0079] Among them, reference Figure 6The side plate 52 of the electrode sheet 5 is set at the edge of the main body 51 of the electrode sheet 5, and the side plate 52 is perpendicular to the main body 51. The main body 51 of the electrode sheet 5 is attached to the side of the slider 3 away from the bottom of the slide groove 11, and the side plate 52 is attached to the side wall of the slider 3 away from the side where the limiting groove 31 is set. This right-angle attachment setting can provide an accurate positioning and installation reference for the electrode sheet 5. Combined with the snap-fit ​​groove 33 on the side wall of the slider 3, the electrode sheet 5 can be stably assembled on the slider 3.

[0080] The snap-fit ​​groove 33 is set on the side wall of the slider 3 away from the limiting groove 31. Specifically, the snap-fit ​​groove 33 is composed of two parallel snap-fit ​​protrusions. The distance between the two snap-fit ​​protrusions is the same as the width of the side plate 52, which can form an interference fit. The side plate 52 can be inserted between the two snap-fit ​​protrusions to achieve snap-fit ​​fixation, effectively preventing the electrode plate 5 from being loosely installed on the slider 3.

[0081] Reference Figures 1 to 4 In some examples, the firing pin 34 is integrally formed on the side of the slider 3 facing the moving contact 6, and the firing pin 34 extends along the sliding direction of the slider 3.

[0082] The striker 34 is integrally mounted on the slider 3 to give the striker 34 sufficient structural strength. At the same time, the striker 34 extends along the sliding direction of the slider 3, so that the linear motion of the slider 3 can be directly converted into the axial thrust of the striker 34 on the moving contact 6, thereby improving the reliability of triggering the second break point.

[0083] Specifically, in combination Figure 6 The striker 34 is located on the side of the slider 3 near the second end of the slide groove 11, and is spaced apart from the limiting groove 31. The extension direction of the striker 34 is the same as the sliding direction of the slider 3, and the extension length of the striker 34 is sufficient to push the moving contact 6 to complete the opening action (the moving contact 6 separates from the second pole piece 22 and moves away from the second pole piece 22).

[0084] Reference Figure 1 and Figure 2 When the slider 3 slides from the beginning to the end of the groove 11 under the drive of the elastic element 4, on the one hand, it drives the electrode 5 away from the first electrode 21 of the varistor 2, cutting off the first break point between them. On the other hand, the striker 34 on the side of the slider 3 precisely pushes the moving contact 6 as the slider 3 reaches the end of the groove 11, forcing the moving contact 6 to separate from the second electrode 22 of the varistor 2, and simultaneously cutting off the conductive path of the second break point.

[0085] With the above solution, even if there is still a wire-like phenomenon between the solder between the electrode plate 5 and the first electrode plate 21 after they are separated, the detachment mechanism 400 can ensure that the circuit is completely disconnected through the cooperation of the striker 34 and the moving contact 6, thus avoiding the risk of residual conduction under surge faults.

[0086] Meanwhile, the integrated design of the striker 34 and the slider 3 eliminates the need for additional drive components. The dual circuit breaking can be achieved through the sliding stroke of the slider 3 alone, which simplifies the overall structure of the mechanism, reduces the number of failure points, and makes the transmission of the disengagement action more direct and the response faster.

[0087] Reference Figure 1 and Figure 2 In some examples, the surge protector 100 also includes a latch 7 and a trip latch 8 that are interlocked. The trip latch 8 is linked to the moving contact 6. The latch 7 is provided with a receiving part 71 corresponding to the striker 34. When the slider 3 slides, the striker 34 pushes against the receiving part 71 to unlock the latch 7 and the trip latch 8. The trip latch 8 causes the moving contact 6 to separate from the second electrode plate 22.

[0088] The moving contact 6 is separated from the second pole piece 22 by unlocking the latch 7 and the jumper 8. On the one hand, the stable engagement of the latch 7 and the jumper 8 can prevent the moving contact 6 from accidentally disengaging due to vibration or other factors during normal operation. On the other hand, the force transmission design of the striker 34 and the receiving part 71 ensures that the unlocking action is fast and without jamming, making the separation process of the moving contact 6 and the second pole piece 22 efficient and controllable. This further ensures the redundancy and safety of the dual-disengagement protection and reduces the circuit risk caused by the failure of a single disengagement mechanism.

[0089] Both the latch 7 and the trip latch 8 are rotatably mounted inside the housing 1 and are positioned to correspond to the movement path of the striker 34 on the slider 3. The trip latch 8 and the moving contact 6 are linked (e.g., fixedly connected via a hinge shaft or integrally formed) to ensure that the rotational motion of the trip latch 8 is directly transmitted to the moving contact 6. The side of the latch 7 facing the striker 34 has a receiving part 71 adapted to the striker 34. In the closed state, the latch 7 and the trip latch 8 remain stably engaged, and the mechanical limit ensures that the moving contact 6 is tightly pressed against the second electrode 22 of the varistor 2, guaranteeing the reliability of the circuit conduction.

[0090] When the solder in the first release unit 200 melts, the slider 3 slides along the groove 11 under the drive of the elastic element 4. The striker 34 on the slider 3 moves synchronously towards the latch 7 and pushes against the receiving part 71. The receiving part 71 converts the linear thrust of the striker 34 into the rotational torque of the latch 7, causing the latch 7 to rotate around its own axis and quickly release the engagement with the jumper 8. After the latch 7 and the jumper 8 are unlocked, the jumper 8 rotates rapidly under its own elastic restoring force, driving the moving contact 6 linked with it to move away from the second electrode 22, ultimately achieving reliable disconnection of the second break point.

[0091] Reference Figure 1 In some examples, the side of the receiving part 71 near the firing pin 34 is set as an arc surface.

[0092] When the striker 34 moves linearly with the slider 3 to push against the receiving part 71, the arc surface design can smoothly convert the axial linear thrust applied by the striker 34 into a rotational torque that drives the latch 7 to rotate around its own axis, avoiding the jamming and sticking problems that may occur in planar contact, and ensuring that the force transmission is lossless and does not deviate.

[0093] Meanwhile, the smooth arc-shaped contact can reduce friction and wear between the striker 34 and the receiving part 71, extend the service life of the component, and can accommodate the slight positional deviation that may occur during the sliding process of the striker 34, thereby improving the fault tolerance rate of the triggering action.

[0094] In critical scenarios where surge triggers tripping, the efficient force conversion brought by the curved surface allows the latch 7 to rotate and unlock quickly, ensuring that the trip latch 8 can promptly separate the moving contact 6 from the second electrode 22, which helps to enhance the protection reliability and redundancy safety of the entire surge protector 100.

[0095] Reference Figure 1 and Figure 2 In some examples, a remote signaling switch 9 is also included, which is located on the movement path of the moving contact 6 away from the second pole piece 22, and the moving contact 6 can push the remote signaling switch 9 to start.

[0096] By employing a combination of remote signaling switch 9 and moving contact 6, on the one hand, it eliminates the need for manual disassembly and inspection, allowing for rapid determination of whether the protector has been triggered by a surge through external signals, facilitating timely troubleshooting of circuit faults and replacement of failed components. On the other hand, the triggering of remote signaling switch 9 and the disconnection of the second breakpoint occur synchronously, ensuring the accuracy of the feedback signal and avoiding misjudgments of the status due to an abnormality in a single disconnection unit.

[0097] The remote signaling switch 9 is used for status feedback. The remote signaling switch 9 is set on the movement path of the moving contact 6 away from the second pole piece 22, and its trigger end faces the movement direction of the moving contact 6, thus matching the corresponding position of the moving contact 6.

[0098] When the moving contact 6 moves away from the second electrode 22 to disconnect the second break point, during the disconnection process, the moving contact 6 simultaneously pushes against the trigger terminal of the remote signaling switch 9, causing the remote signaling switch 9 to switch from the initial state to the activated state. The remote signaling switch 9 can be electrically connected to an external monitoring system, alarm device, or control platform, and its state switching signal can be fed back to the back end in real time, intuitively informing the surge protector 100 that it has tripped. This embodiment further improves the functional system of the surge protector 100 provided in this embodiment, enabling the protection action to not only be reliably executed but also to form effective feedback, which is beneficial to improving the ease of operation and maintenance and overall safety of the circuit system.

[0099] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A surge protector, characterized in that, include: The first and second disengagement units are connected in series, along with interlocking latches and jump latches; The first disconnection unit includes a first electrode of a varistor and an electrode plate electrically connected to the input terminal. The first electrode and the electrode plate are connected by solder to form a first break point. The second disconnection unit includes a second electrode of a varistor, a moving contact electrically connected to the output terminal, and a disconnection mechanism. The moving contact contacts the second electrode to form a second break point. The disconnection mechanism includes a slider and an elastic element. The electrode is fixed to the slider, the slider is provided with a striker, and the elastic element is elastically connected to the slider. The jumper is linked to the moving contact. When a surge occurs in the circuit, the solder melts and breaks the first break point. The slider slides under the action of the elastic element, and the striker pushes against the latch to unlock the latch from the jumper. The jumper causes the moving contact to separate from the second electrode.

2. The surge protector according to claim 1, characterized in that, It also includes a housing, which is provided with a sliding groove. The starting end of the sliding groove is close to the first electrode plate, and the end of the sliding groove is close to the moving contact. The slider is slidably mounted in the sliding groove, and the elastic element elastically connects the slider and the end of the sliding groove.

3. The surge protector according to claim 2, characterized in that, The firing pin is integrally formed on the side of the slider facing the moving contact, and the firing pin extends along the sliding direction of the slider.

4. The surge protector according to claim 2, characterized in that, The slide includes a first side plate and a second side plate arranged in parallel and spaced apart, and a limiting plate located between the two. The opposite side walls of the slider are respectively slidably engaged with the first side plate and the second side plate, and the slider is provided with a limiting groove adapted to the limiting plate. The limiting plate can be embedded in the limiting groove to form a limiting engagement.

5. The surge protector according to claim 4, characterized in that, The end of the chute is provided with a stop block, which is located between the first side plate and the limiting plate, and between the second side plate and the limiting plate.

6. The surge protector according to claim 4, characterized in that, The slider has a first connecting post on the side opposite to the bottom of the groove, and the limiting plate has a second connecting post. The first connecting post and the second connecting post are parallel, and the two ends of the elastic member are respectively connected to the first connecting post and the second connecting post.

7. The surge protector according to claim 6, characterized in that, The electrode sheet includes an integrally formed main body and a side plate. The main body is provided with an assembly hole adapted to the first connecting post. The main body is sleeved and fixed to the first connecting post through the assembly hole. The slider is provided with a snap-fit ​​groove on the side near the starting end of the slide groove. The side plate is snap-fitted and fixed to the snap-fit ​​groove.

8. The surge protector according to claim 3, characterized in that, The latch is provided with a receiving part corresponding to the striking pin, and the striking pin pushes against the receiving part.

9. The surge protector according to claim 8, characterized in that, The receiving part is configured with an arc surface on the side near the firing pin.

10. The surge protector according to any one of claims 1-9, characterized in that, It also includes a remote signaling switch, which is located on the movement path of the moving contact away from the second pole piece, and the moving contact can push the remote signaling switch to start.

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