A surge protector

Abstract

The utility model relates to a kind of surge protectors, including base and surge protection module installed on base.Welding part is connected with sliding member in the fixed conductive sheet in surge protection module, after melting, sliding member moves under the action of push block and first tension spring, and partition plate enters between fixed conductive sheet and sliding member under the action of second tension spring.Partition plate is equipped with the wire breaking part for cutting or disturbing residual tin wire, and pin shaft on partition plate moves along the guide groove of locking piece and enters locking groove, and stop pawl resets under the action of torsion spring to limit pin shaft exit.The structure can improve the cutting effect of residual tin wire, and make partition plate stable and keep in partition position.

Description

Technical Field

[0001] This utility model relates to the technical field of circuit protection devices, specifically to a surge protector. Background Technology

[0002] Surge protectors are typically used to limit transient overvoltages and discharge surge currents to protect downstream electrical equipment. In some surge protectors, the surge protection module includes a fixed conductive plate, a sliding element, and a solder joint. The fixed conductive plate and the sliding element are electrically connected via the solder joint. When the surge protection element overheats abnormally, the solder joint melts, causing the sliding element to move relative to the fixed conductive plate, thus breaking the electrical connection and achieving thermal trip protection.

[0003] In existing structures, to reduce the impact of residual solder after the solder joint melts, a partition plate is usually installed. This partition plate, under the action of an elastic element, enters between the fixed conductive sheet and the sliding component to isolate the molten solder residue. However, after the solder joint melts, it may form filamentous residue. The end structure of conventional partition plates is relatively flat, making it difficult to effectively cut off this filamentous residue when entering between the fixed conductive sheet and the sliding component. This results in the risk of residual electrical connection remaining between the fixed conductive sheet and the sliding component.

[0004] Furthermore, after the partition plate is moved to the partition position, if it is only maintained by the force of the elastic element, the partition plate may be unstable due to the obstruction of residual solder, vibration of the mechanism, or the influence of assembly gaps, thus affecting the partition effect. Utility Model Content

[0005] The purpose of this invention is to provide a surge protector to improve the problems of insufficient isolation of residual solder wire after the solder joint melts and insufficient stability of the isolation plate.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A surge protector includes a base and a surge protection module mounted on the base. A fixed conductive sheet within the surge protection module is connected to a sliding member via a solder joint. After the solder joint melts, the sliding member tends to move relative to the fixed conductive sheet. A partition plate is connected to an elastic member and, under the action of the elastic member, tends to enter between the fixed conductive sheet and the sliding member. The partition plate has a wire break portion on its side facing the solder joint. A pin is provided on the partition plate. A locking member is provided within the surge protection module. The locking member forms a guide groove for the pin to move. One end of the guide groove, near the partition plate and entering between the fixed conductive sheet and the sliding member, communicates with a locking groove. The locking member forms a stop portion at the locking groove to restrict the pin from retracting from the locking groove back into the guide groove.

[0007] With the above structure, after the solder joint melts, the sliding member moves relative to the fixed conductive sheet, and the partition plate enters between the fixed conductive sheet and the sliding member under the action of the elastic member. The wire-breaking part on the partition plate can cut or break the residual solder wire formed after the solder joint melts, which helps to reduce residual electrical connections. At the same time, during the movement of the partition plate, the pin moves along the guide groove and enters the locking groove after the partition plate reaches the partition position. The anti-retraction part restricts the pin from returning to the guide groove, so that the partition plate can be held stably in the partition position.

[0008] Furthermore, the surge protection module includes a push block connected to a first tension spring, which, under the action of the first tension spring, tends to move the sliding member. The elastic member is a second tension spring connected to the partition plate. Thus, the sliding member and the partition plate can move under the action of their respective tension springs, with a clear action relationship and a relatively compact structure.

[0009] Furthermore, the partition plate is oscillating around a pivot point, and the guide groove is an arc-shaped groove adapted to the movement trajectory of the pin as the partition plate oscillates around the pivot point. This allows the pin to move smoothly with the oscillation of the partition plate, reducing jamming during its movement.

[0010] Furthermore, the anti-reverse part is a stop pawl disposed at the entrance of the locking groove, which at least partially blocks the entrance of the locking groove after the pin enters the locking groove. Therefore, the pin is less likely to retract after entering the locking groove, which helps improve the reliability of the partition plate.

[0011] Furthermore, the stop pawl is rotatably mounted on the locking member. The stop pawl is connected to a torsion spring and, under the action of the torsion spring, tends to reset towards blocking the entrance of the locking groove. Thus, when the pin enters the locking groove, it can push the stop pawl to move out of position. After the pin enters, the stop pawl can reset to form a limit. The structure is simple and the operation is reliable.

[0012] Furthermore, the broken wire portion is located at one end of the partition plate near the sliding member, and the broken wire portion has a pointed tip structure protruding towards the solder joint. Therefore, when the partition plate enters between the fixed conductive sheet and the sliding member, the broken wire portion more easily acts on the residual solder wire.

[0013] Furthermore, the broken wire portion comprises a plurality of tapered protrusions spaced apart along the width direction of the partition plate. The tips of the tapered protrusions are slightly higher than the upper end face of the partition plate near the sliding member. The sliding member has an arc-shaped transition surface on the side facing the partition plate. The distance between adjacent tapered protrusions is less than the effective contact width of the arc-shaped transition surface in the width direction of the partition plate. Thus, when the partition plate enters between the fixed conductive sheet and the sliding member, the tips of the tapered protrusions can first act on the residual solder wire; when the sliding member moves relative to the partition plate, the arc-shaped transition surface can cross the gap between adjacent tapered protrusions and pass over the broken wire portion.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows: the partition plate is provided with a wire-breaking part, which can cut or break the residual solder wire after the solder part melts, which is conducive to improving the thoroughness of the breakage; the partition plate is provided with a pin shaft, which cooperates with the guide groove, locking groove and anti-retraction part of the locking component, so that the partition plate can be mechanically limited after reaching the partition position, reducing the possibility of it exiting the partition position due to insufficient holding force of the elastic component, thereby improving the reliability of the partition holding after the surge protector is thermally tripped and the safety of use. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of a surge protector.

[0016] Figure 2 This is an internal schematic diagram of the overall structure of a surge protector.

[0017] Figure 3 for Figure 2 The diagram shows an enlarged schematic of the structure of area A of a surge protector.

[0018] Figure 4 This is a schematic diagram of the state of a surge protector after the solder joint has melted.

[0019] Figure 5 for Figure 4 The diagram shows an enlarged schematic of the structure of area B of a surge protector.

[0020] Attached icon numbers: 1. Base; 2. Surge protection module; 21. Push block; 22. Sliding component; 23. First tension spring; 24. Second tension spring; 25. Partition plate; 251. Pin; 252. Broken wire section; 26. Fixed conductive sheet; 27. Soldering section; 28. Locking component; 281. Guide groove; 282. Stop claw; 283. Torsion spring. Detailed Implementation

[0021] The technical solutions of this application will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. 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 this application.

[0022] like Figures 1 to 5 As shown, this embodiment discloses a surge protector, which includes a base 1 and a surge protection module 2 mounted on the base 1. The base 1 is used to support and install the surge protection module 2, and can cooperate with external lines or mounting structures. The surge protection module 2 can be inserted, snap-fitted, or otherwise mounted on the base 1, and the surge protection module 2 is provided with functional structures for realizing surge protection and thermal tripping.

[0023] Combination Figure 1 and Figure 2 As shown, a surge protection module 2 is installed on the base 1, serving as a relatively independent protection unit. The surge protection module 2 includes a push block 21, a slider 22, a first tension spring 23, a second tension spring 24, a partition plate 25, a fixed conductive sheet 26, a solder joint 27, and a locking element 28. The fixed conductive sheet 26 and the slider 22 are connected by the solder joint 27. When the surge protector is in normal operation, the solder joint 27 maintains the electrical connection between the fixed conductive sheet 26 and the slider 22, and also holds the slider 22 in place. When the surge protection element in the surge protection module 2 overheats abnormally, the heat is transferred to the solder joint 27, causing it to melt or soften, thereby releasing the connection between the fixed conductive sheet 26 and the slider 22.

[0024] A push block 21 is disposed within the surge protection module 2 and connected to a first tension spring 23. One end of the first tension spring 23 is connected to the push block 21, and the other end is connected to a relatively fixed position within the surge protection module 2, giving the push block 21 a tendency to move under the action of the first tension spring 23. The push block 21 cooperates with the slider 22. After the solder joint 27 melts, the push block 21 can drive the slider 22 to move relative to the fixed conductive sheet 26 under the action of the first tension spring 23. Specifically, under normal conditions, the solder joint 27 holds the slider 22 in the position connected to the fixed conductive sheet 26. Although the push block 21 is subjected to the action of the first tension spring 23, both the push block 21 and the slider 22 are in an initial held state because the slider 22 is restricted by the solder joint 27. When the solder joint 27 melts, the restriction on the slider 22 is released, and the push block 21 drives the slider 22 to move under the tension of the first tension spring 23, causing the slider 22 to disengage from the fixed conductive sheet 26, thereby achieving thermal tripping.

[0025] A partition plate 25 is disposed within the surge protection module 2 and connected to a second tension spring 24. One end of the second tension spring 24 is connected to the partition plate 25, and the other end is connected to a relatively fixed position within the surge protection module 2 or another position that can provide tensile support, causing the partition plate 25 to tend to move between the fixed conductive sheet 26 and the sliding member 22 under the action of the second tension spring 24. The partition plate 25 is mainly used to enter between the fixed conductive sheet 26 and the sliding member 22 after the solder joint 27 melts, to isolate any residual solder wires that may exist between them, and to form a physical isolation between them.

[0026] Combination Figure 2 and Figure 3 As shown, when the surge protector is in its initial state, the push block 21 abuts against or acts on the slider 22, and the slider 22 abuts against or limits the partition plate 25. At this time, the slider 22 is held in the position connected to the fixed conductive sheet 26 by the connection of the solder joint 27. Although the partition plate 25 is subjected to the tension of the second tension spring 24, the partition plate 25 cannot enter between the fixed conductive sheet 26 and the slider 22 because the slider 22 limits the partition plate 25. That is to say, in the initial state, the solder joint 27 indirectly restricts the movement of the partition plate 25 through the slider 22, and both the first tension spring 23 and the second tension spring 24 are in a pre-tensioned state or have a corresponding driving tendency.

[0027] like Figure 3As shown, the partition plate 25 has a wire-breaking section 252 at one end near the sliding member 22 and the solder joint 27. The wire-breaking section 252 is located on the side of the partition plate 25 facing the solder joint 27 and is used to cut, break, or scrape off any residual solder wires that may form after the solder joint 27 melts when the partition plate 25 enters between the fixed conductive sheet 26 and the sliding member 22. Compared to the conventionally straight or blunted end of a partition plate, the wire-breaking section 252 has a stronger local action capability, capable of cutting or destroying residual solder wires within a smaller contact area, reducing the possibility of residual solder wires continuing to bridge the fixed conductive sheet 26 and the sliding member 22.

[0028] In this embodiment, the wire-breaking portion 252 is configured as multiple tapered protrusions extending from the front end of the partition plate 25. These tapered protrusions are spaced apart along the width of the partition plate 25, with the tips slightly higher than the upper surface of the partition plate 25 near the sliding member 22. The tapered protrusions protrude towards the solder joint 27, allowing the partition plate 25 to swing upwards and approach the solder joint 27 area. The tapered protrusions can then contact the residual solder wire before the main body of the partition plate 25, and cut or break the residual solder wire through their protruding tips. Compared to the conventionally flat or blunted end of a partition plate, the wire-breaking portion 252 can act on the residual solder wire within a smaller contact area, causing the residual solder wire to break and no longer maintain the bridging state between the fixed conductive sheet 26 and the sliding member 22.

[0029] The sliding member 22 has an arc-shaped transition surface on the side facing the partition plate 25. This arc-shaped transition surface cooperates with the broken wire portion 252 and is used to pass over the broken wire portion 252 when the sliding member 22 is moved by the push block 21. The distance between adjacent conical protrusions is less than the effective contact width of the arc-shaped transition surface in the width direction of the partition plate 25. Thus, when the sliding member 22 slides relative to the partition plate 25 and passes over the broken wire portion 252, the arc-shaped transition surface crosses the gap between adjacent conical protrusions and moves along the outer surface of the conical protrusions, allowing the sliding member 22 to pass over the broken wire portion 252. The above structure ensures that the broken wire portion 252 cuts or breaks the residual solder wire while the sliding member 22 completes the disengagement action relative to the partition plate 25.

[0030] The partition plate 25 is also provided with a pin 251, which moves synchronously with the partition plate 25. A locking member 28 is fixedly provided inside the surge protection module 2, and the locking member 28 remains fixed relative to the surge protection module 2. A guide groove 281 is formed on the locking member 28, and the pin 251 extends into the guide groove 281 and can move along the guide groove 281. The guide groove 281 is used to limit the movement path of the partition plate 25, so that the partition plate 25 moves along a predetermined trajectory under the action of the second tension spring 24, preventing the partition plate 25 from swaying or deviating during operation.

[0031] Combination Figure 3 and Figure 5As shown, the guide groove 281 is an arc-shaped groove adapted to the movement trajectory of the pin 251 as it swings with the partition plate 25. Since the partition plate 25 does not move linearly under the action of the second tension spring 24, but swings around its pivot point, the movement trajectory of the pin 251 is also correspondingly arc-shaped. Setting the guide groove 281 as an arc-shaped groove adapted to this movement trajectory helps reduce friction and jamming between the pin 251 and the groove wall of the guide groove 281, allowing the partition plate 25 to swing more smoothly from its initial position to the partition position. The arc center of the guide groove 281 can correspond to the pivot point of the partition plate 25, and the radius of the guide groove 281 can be adapted to the distance between the pivot point of the partition plate 25 and the center of the pin 251. In this way, when the pin 251 moves within the guide groove 281, it will not significantly interfere with the natural swing trajectory of the partition plate 25, thereby improving the reliability of the partition plate 25's operation.

[0032] The locking member 28 also has a locking groove communicating with the guide groove 281. The locking groove is located at the end of the guide groove 281 near the partition plate 25 where it enters between the fixed conductive sheet 26 and the sliding member 22, which is the position reached by the pin 251 when the partition plate 25 moves to the vicinity of the partition position. When the partition plate 25 swings upward under the action of the second tension spring 24 and enters between the fixed conductive sheet 26 and the sliding member 22, the pin 251 moves along the guide groove 281; when the partition plate 25 reaches the predetermined partition position, the pin 251 enters the locking groove. After the pin 251 enters the locking groove, the partition plate 25 is mechanically limited by the locking groove and is not easily pulled back out of the partition position. Thus, the holding of the partition plate 25 no longer depends solely on the tension of the second tension spring 24, but is mechanically locked by the cooperation between the pin 251 and the locking groove.

[0033] To further restrict the pin 251 from retracting from the locking groove to the guide groove 281, the locking member 28 is provided with a stop pawl 282 at the entrance of the locking groove. The stop pawl 282 is positioned on the path of the pin 251 entering the locking groove and can make way when the pin 251 enters the locking groove, and reset to block the entrance of the locking groove after the pin 251 has entered. The stop pawl 282 is rotatably connected to the locking member 28 and is connected to a torsion spring 283. The torsion spring 283 causes the stop pawl 282 to tend to reset in the direction of blocking the entrance of the locking groove. In the reset state, the stop pawl 282 at least partially covers the entrance of the locking groove, thereby restricting the pin 251 that has entered the locking groove.

[0034] Specifically, such as Figure 5As shown, before the partition plate 25 reaches the locking position, the pin 251 moves along the guide groove 281. When the pin 251 moves to the entrance of the locking groove, it contacts the stop pawl 282 and pushes the stop pawl 282 to rotate against the force of the torsion spring 283, thus opening the entrance of the locking groove. Since the torque of the torsion spring 283 can be set to be relatively small, the pin 251 can smoothly push open the stop pawl 282 during the movement of the partition plate 25 driven by the second tension spring 24, and the partition plate 25 will not be affected by excessive resistance from the stop pawl 282 when it enters the partition position. After the pin 251 passes the stop pawl 282 and enters the locking groove, the stop pawl 282 resets under the action of the torsion spring 283 and blocks the entrance of the locking groove again. At this time, if the partition plate 25 is subjected to vibration, residual solder wire reaction force or other external force and has a tendency to retract, the pin 251 will be restricted by the stop pawl 282 and the locking groove wall, making it difficult to retract from the locking groove to the guide groove 281, thereby keeping the partition plate 25 in the partition position.

[0035] The free end of the stop pawl 282 can extend toward the entrance of the locking groove and cover at least a portion of the entrance in the reset state. The effective blocking length of the stop pawl 282 can be determined according to the diameter of the pin 251 and the size of the locking groove entrance, so that the pin 251 cannot be directly withdrawn without external force after entering the locking groove. The shape of the stop pawl 282 can be set as a plate, claw, or block, as long as it can form a stop and limit the pin 251 after it enters the locking groove. The torsion spring 283 is used to automatically reset the stop pawl 282, so that the locking member 28 has the effect of one-way entry and reverse stop. With this structure, the pin 251 experiences less resistance when entering the locking groove, and can be reliably restricted from exiting after entering the locking groove, ensuring both smooth operation and reliable locking.

[0036] Combination Figure 4 and Figure 5 As shown, after the solder joint 27 melts, the surge protector is in the tripped state. At this time, the push block 21 moves under the action of the first tension spring 23, and drives the sliding member 22 to move relative to the fixed conductive plate 26. During the movement, the sliding member 22 gradually disengages from the contact or limiting relationship formed by the partition plate 25. After the sliding member 22 disengages from the partition plate 25, the partition plate 25 swings upward under the action of the second tension spring 24 and enters the space between the fixed conductive plate 26 and the sliding member 22. When the partition plate 25 enters the gap, the broken wire part 252 at its front end first enters the area near the solder joint 27 to cut or break the remaining solder wire. Subsequently, the main body of the partition plate 25 further enters the space between the fixed conductive plate 26 and the sliding member 22, forming a physical isolation.

[0037] As the partition plate 25 swings upward, the pin 251 moves along the guide groove 281. Because the guide groove 281 matches the swing trajectory of the partition plate 25, the pin 251 can smoothly move from one end of the guide groove 281 to the end near the locking groove. When the partition plate 25 reaches the partition position, the pin 251 pushes open the stop pawl 282 and enters the locking groove. The stop pawl 282 resets under the action of the torsion spring 283, thus confining the pin 251 within the locking groove. Therefore, the partition plate 25 is held between the fixed conductive sheet 26 and the sliding member 22, and is less likely to be dislodged from the partition position due to the weakening of the tension of the second tension spring 24, mechanism vibration, residual solder adhesion, or external impact.

[0038] In this embodiment, the partition plate 25 achieves a dual improvement through the wire-breaking section 252 and the locking structure. On the one hand, the wire-breaking section 252 improves the problem of insufficient cutting ability of conventional partition plate end structures for filamentous residual solder, allowing the partition plate 25 to act more actively on the residual solder wire when entering between the fixed conductive sheet 26 and the sliding member 22, thus improving the reliability of the residual electrical connection being broken. On the other hand, the pin 251, guide groove 281, locking groove, stop pawl 282, and torsion spring 283 cooperate to form a mechanical retention of the partition plate 25 after reaching the partition position, reducing the instability caused by the partition plate 25 being held only by the second tension spring 24. With the above structure, the partition plate 25 can not only enter the separation area after the solder 27 melts, but also be locked after entering, thereby helping to maintain the electrical isolation state between the fixed conductive sheet 26 and the sliding member 22.

[0039] It should be noted that the specific number, arrangement, and protrusion height of the wire breakage portions 252 can be adjusted according to the relative positions of the fixed conductive sheet 26, the sliding member 22, and the soldering portion 27. The wire breakage portion 252 can be a single conical protrusion or multiple spaced conical protrusions. When multiple conical protrusions are arranged along the width direction of the partition plate 25, they can act on the residual solder wire over a wider range. The tip of the conical protrusion is slightly higher than the upper end face of the partition plate 25 near the sliding member 22, so that the wire breakage portion 252 acts on the residual solder wire before the main body end face of the partition plate 25. The protrusion height of the wire breakage portion 252, the spacing between adjacent conical protrusions, and the size of the arc transition surface are matched to allow the arc transition surface to cross the gap between adjacent conical protrusions and pass over the wire breakage portion 252 along the outer surface of the conical protrusions, while simultaneously allowing the wire breakage portion 252 to extend into the area where the residual solder wire is located to cut or break it. The specific dimensions can be designed according to the motion envelope range of the bottom arc transition surface of the slider 22, so that the slider 22 can pass over the broken wire part 252, while the broken wire part 252 can extend into the area where residual solder wire may exist.

[0040] It should also be noted that the arc shape of the guide groove 281 is designed to accommodate the swing trajectory of the partition plate 25. The guide groove 281 is not limited to a strictly standard circular arc; as long as it allows the pin 251 to move with the partition plate 25 and guides the pin 251 into the locking groove, it meets the usage requirements. The locking groove can be located at the end of the guide groove 281 and offset from the extension direction of the guide groove 281, making it difficult for the pin 251 to retract along its original path after entering the locking groove. The stop pawl 282 and the torsion spring 283 further improve the anti-retraction capability of the locking groove. The rotation axis and free end length of the stop pawl 282 and the torque of the torsion spring 283 can be matched and designed according to the diameter of the pin 251, the tension of the second tension spring 24, and the entrance size of the locking groove to ensure that the pin 251 can smoothly enter the locking groove and be reliably held after entering.

[0041] In the operation of this embodiment, the first tension spring 23 is mainly used to drive the push block 21 to move the sliding member 22, causing the sliding member 22 to disengage from the fixed conductive sheet 26; the second tension spring 24 is mainly used to drive the partition plate 25 into the space between the fixed conductive sheet 26 and the sliding member 22; the locking member 28 is mainly used to restrict the partition plate 25 from retracting after it is in place. The three functions work together, but their functional focuses are different. The first tension spring 23 and the second tension spring 24 provide the driving force for the action, while the locking member 28 provides the holding force after it is in place. In this way, the partition plate 25 does not need to rely entirely on the continuous tension of the second tension spring 24 to maintain the partition position, but can be held in the partition position by the mechanical cooperation between the pin 251 and the locking member 28.

[0042] In summary, the surge protector provided in this embodiment allows the sliding member 22 to detach from the fixed conductive sheet 26 under the action of the pushing block 21 and the first tension spring 23 after the solder joint 27 melts. The partition plate 25 can enter between the fixed conductive sheet 26 and the sliding member 22 under the action of the second tension spring 24. The wire-breaking part 252 can cut or break the residual solder wire formed after the solder joint 27 melts. The pin 251 can move along the guide groove 281 and enter the locking groove. The stop pawl 282 resets under the action of the torsion spring 283 to prevent the pin 251 from exiting the locking groove. This improves both the ability of the partition plate 25 to handle residual solder wire and the reliability of the partition plate 25 in the isolation position, thereby improving the disconnection reliability and safety of the surge protector after thermal tripping.

[0043] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A surge protector, comprising a base (1) and a surge protection module (2) mounted on the base (1), characterized in that: The fixed conductive sheet (26) in the surge protection module (2) is connected to the sliding member (22) through the solder joint (27). After the solder joint (27) melts, the sliding member (22) tends to move relative to the fixed conductive sheet (26). The partition plate (25) is connected to the elastic member and tends to enter between the fixed conductive sheet (26) and the sliding member (22) under the action of the elastic member. The partition plate (25) has a wire breakage part (252) on the side facing the soldering part (27). The partition plate (25) has a pin (251). The surge protection module (2) has a locking member (28). The locking member (28) has a guide groove (281) for the pin (251) to move. The guide groove (281) is connected to a locking groove at one end near the partition plate (25) between the fixed conductive sheet (26) and the sliding member (22). The locking member (28) has a backstop part at the locking groove for restricting the pin (251) from retracting from the locking groove to the guide groove (281).

2. The surge protector according to claim 1, characterized in that: The surge protection module (2) is provided with a push block (21). The push block (21) is connected to the first tension spring (23) and has the tendency to drive the sliding member (22) to move under the action of the first tension spring (23). The elastic member is the second tension spring (24) connected to the partition plate (25).

3. The surge protector according to claim 1, characterized in that: The partition plate (25) is oscillating around the pivot point, and the guide groove (281) is an arc-shaped groove that matches the motion trajectory of the pin (251) as the partition plate (25) oscillates around the pivot point.

4. The surge protector according to claim 3, characterized in that: The anti-reverse part is a stop pawl (282) provided at the entrance of the locking groove. The stop pawl (282) at least partially blocks the entrance of the locking groove after the pin (251) enters the locking groove.

5. The surge protector according to claim 4, characterized in that: The stop pawl (282) is rotatably disposed on the locking member (28). The stop pawl (282) is connected to the torsion spring (283) and has a tendency to reset in the direction of blocking the entrance of the locking groove under the action of the torsion spring (283).

6. The surge protector according to claim 1, characterized in that: The broken wire portion (252) is disposed at one end of the partition plate (25) near the sliding member (22), and the broken wire portion (252) has a pointed tip structure protruding toward the solder portion (27).

7. The surge protector according to claim 6, characterized in that: The broken wire portion (252) consists of a plurality of tapered protrusions spaced apart along the width direction of the partition plate (25). The tips of the tapered protrusions are higher than the upper end face of the partition plate (25) near the sliding member (22). The sliding member (22) has an arc transition surface on the side facing the partition plate (25). The distance between adjacent tapered protrusions is less than the effective contact width of the arc transition surface in the width direction of the partition plate (25).

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