A varistor and surge protector

Abstract

This utility model belongs to the field of electrical equipment technology and discloses a varistor and a surge protector. The varistor includes a varistor resistor, a first electrode, a second electrode, and a third electrode. The first electrode includes a first connecting portion and a first contact portion connected together. The second electrode includes a second connecting portion and a second contact portion connected together. The first and second contact portions are fixedly attached to opposite sides of the varistor resistor. The third electrode includes a third connecting portion disposed between the first and second connecting portions. The first connecting portion is provided with a positioning head for positioning the second and third connecting portions. The surge protector includes the aforementioned varistor. The varistor and surge protector provided by this utility model can achieve reliable positioning between multiple electrodes without the need for an external positioning structure, reducing production costs, improving production efficiency, ensuring accurate and reliable positioning after welding, and ensuring good conductivity.

Description

Technical Field

[0001] This utility model relates to the field of electrical equipment technology, and in particular to a varistor and surge protector. Background Technology

[0002] Surge protectors, also known as lightning arresters or surge protectors (SPDs), are suitable for AC 50 / 60Hz or DC power supply systems or communication systems with a rated voltage below 2000V. The working principle of a surge protector is as follows: when there is no surge in the system, it maintains high impedance; when a surge voltage reaches the threshold voltage of the protected element, its impedance decreases as the surge current and voltage increase, dissipating surge energy and limiting the voltage at its output terminal within a specified range, thereby protecting the downstream equipment from the impact of surge current and transient overvoltages.

[0003] In surge protectors, the varistor is a crucial internal protective component. High-current-capacity varistors often employ a structure of two resistive elements connected in parallel. The two elements are respectively connected to a first electrode and a second electrode, with a third electrode between them for connecting to external circuitry. In existing technology, the first, second, and third electrodes are fixed by welding. Before welding, external clamps or other positioning structures are required for initial fixation, which increases production costs and impacts production efficiency. Utility Model Content

[0004] The purpose of this invention is to provide a pressure-sensitive element in which reliable positioning of the three electrodes can be achieved without the need for an external positioning structure, thereby reducing production costs, improving production efficiency, ensuring accurate and reliable positioning after welding, and ensuring good conductivity.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] A pressure-sensitive element, comprising:

[0007] Varistor;

[0008] The first electrode includes a first connecting portion and a first contact portion that are connected to each other;

[0009] The second electrode includes a second connecting portion and a second contact portion connected together, and the first contact portion and the second contact portion are fixedly attached to opposite sides of the varistor;

[0010] The third electrode includes a third connecting portion, which is disposed between the first connecting portion and the second connecting portion. The first connecting portion is provided with a positioning head, which is used to position the second connecting portion and the third connecting portion.

[0011] Preferably, two sets of positioning heads are provided at intervals, and the third connecting part is provided with a positioning hole. The positioning head passes through the positioning hole, and the second connecting part abuts between the passing ends of the two sets of positioning heads.

[0012] Preferably, the second connecting part has at least one groove corresponding to the positioning head, and the positioning head is located in the groove.

[0013] Preferably, the number of positioning heads is set to two, the distance between the two positioning heads is a1, and the distance from the bottom of the groove to the opposite side end face of the second connecting part is a2, then a1≥a2.

[0014] Preferably, the positioning head is formed by bending and extending from the edge of the first connecting portion.

[0015] Preferably, the first electrode further includes a first support portion, which extends onto the first contact portion, and the first connecting portion is bent onto the first support portion;

[0016] And / or, the second electrode further includes a second support portion, which extends onto the second contact portion, and the second connecting portion is bent onto the second support portion.

[0017] Preferably, the first contact portion is welded to the first side of the varistor, and the second contact portion is welded to the second side of the varistor;

[0018] The first connecting part is welded to the first side of the third connecting part, and the second connecting part is welded to the second side of the third connecting part.

[0019] This utility model also provides a surge protector, which includes the above-mentioned varistor. It has a simple structure and can achieve reliable positioning between the three electrodes without the need for an external positioning structure, thus ensuring good conductivity.

[0020] A surge protector, comprising the varistor element described in any one of the preceding claims, further comprising:

[0021] A support member, on which the pressure-sensitive element is fixed;

[0022] The indicator includes a first drive unit, a second drive unit, and an indicator unit connected in sequence, wherein the second drive unit is inclined away from the support member;

[0023] A push rod is movably mounted on the support member. The indicator is located between the support member and the push rod. A conductive sheet is provided on the push rod. The conductive sheet is connected to the fourth electrode of the varistor by low-temperature soldering. The push rod presses against the first driving part to hold the indicator in the first indicating position.

[0024] An elastic element is provided, with one end connected to the support member and the other end connected to the push rod. The elastic element is used to drive the push rod to move when the low-temperature solder between the conductive sheet and the fourth electrode melts, so as to separate the conductive sheet from the fourth electrode and cause the push rod to press against the second driving part to drive the indicator part to move to the second indicator position.

[0025] Preferably, the indicator further includes a hinge shaft disposed between the first driving part and the second driving part, the hinge shaft being hinged to the support member.

[0026] Preferably, the indicator further includes an elastic portion disposed between the second driving portion and the indicator portion.

[0027] Preferably, the surge protector has an indicator window, and the indicator part is provided with a perforated hole;

[0028] When in the first indicator position, the cutout hole is offset from the indicator window;

[0029] When in the second indicator position, the cutout hole coincides with the indicator window.

[0030] Beneficial effects:

[0031] The pressure-sensitive element provided by this utility model has a positioning head on the first connecting part. When the three electrodes are connected, the positioning head positions the second and third connecting parts. The positioning of the three electrodes can be achieved without the need for external positioning fixtures or other components, thereby reducing production costs, improving production efficiency, and ensuring that the relative positions of the three electrodes are accurate and reliable before welding. This ensures the welding quality between the first, second, and third electrodes and guarantees good conductivity.

[0032] This utility model also provides a surge protector. The surge protector utilizes the aforementioned varistor, has a simple structure, and achieves reliable positioning between the three electrodes without the need for external positioning structures, ensuring good conductivity. Specifically, when the surge protector is in normal operation, the conductive sheet is soldered to the fourth electrode, causing the push rod to press against the first driving part, keeping the indicator at the first indicating position. When the varistor deteriorates or is overloaded, its temperature rises to the melting temperature of the low-temperature alloy solder, causing the aforementioned low-temperature solder to melt. At this time, the elastic element, under the action of elastic force, drives the push rod to move, specifically from above the first driving part to above the second driving part. During this process, the pressure on the first driving part is released, and the push rod then presses against the second driving part. Since the second driving part is inclined away from the support member compared to the first driving part, when the push rod presses against the second driving part, the second driving part moves towards the side closer to the support member and drives the indicator to move, causing the indicator to move from the first indicating position to the second indicating position, thus achieving the switching of the indicating position. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the structure of the pressure-sensitive element provided by this utility model;

[0034] Figure 2 This is an exploded view of the pressure-sensitive element provided by this utility model;

[0035] Figure 3 This is a schematic diagram of the surge protector provided by this utility model;

[0036] Figure 4 This is a partial structural schematic diagram of the surge protector provided by this utility model;

[0037] Figure 5 This is a schematic diagram of the structure of the indicator element of the surge protector provided by this utility model;

[0038] Figure 6 This is a schematic diagram of the indicator provided by this utility model in the first indicator position;

[0039] Figure 7 This is a schematic diagram of the indicator provided by this utility model in the second indicator position.

[0040] In the picture:

[0041] 1. Varistor; 11. Varistor; 12. First electrode; 121. First connecting part; 1211. Positioning head; 122. First contact part; 123. First support part; 13. Second electrode; 131. Second connecting part; 1311. Groove; 132. Second contact part; 133. Second support part; 14. Third electrode; 141. Third connecting part; 1411. Positioning hole; 142. Third contact part; 15. Fourth electrode;

[0042] 2. Support component; 21. Clearance groove; 22. First conductive contact;

[0043] 3. Indicator; 31. First drive unit; 32. Second drive unit; 33. Indicator; 331. Hollow hole; 34. Hinge shaft; 35. Elastic part;

[0044] 4. Push rod; 41. Conductive sheet;

[0045] 5. Elastic components;

[0046] 6. Outer shell; 61. Indicator window. Detailed Implementation

[0047] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0048] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0049] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0050] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, 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 utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0051] This embodiment provides a pressure-sensitive element 1. (Refer to...) Figures 1 to 2 As shown. The varistor 1 includes a varistor 11, a first electrode 12, a second electrode 13, and a third electrode 14. The first electrode 12 includes a first connecting portion 121 and a first contact portion 122 connected together; the second electrode 13 includes a second connecting portion 131 and a second contact portion 132 connected together, the first contact portion 122 and the second contact portion 132 being fixedly attached to opposite sides of the varistor 11; the third electrode 14 includes a third connecting portion 141, the third connecting portion 141 being disposed between the first connecting portion 121 and the second connecting portion 131, and the first connecting portion 121 being provided with a positioning head 1211, the positioning head 1211 being used to position the second connecting portion 131 and the third connecting portion 141.

[0052] In this embodiment, a positioning head 1211 is provided on the first connecting part 121. When the three electrodes are connected, the third connecting part 141 is supported on the first connecting part 121, and the second connecting part 131 is supported on the third connecting part 141. The positioning head 1211 positions the second connecting part 131 and the third connecting part 141. The positioning of the three electrodes can be achieved without the need for external positioning fixtures or other components, which reduces production costs, improves production efficiency, and ensures that the relative positions of the three electrodes are accurate and reliable before welding. This ensures the welding quality between the first electrode 12, the second electrode 13, and the third electrode 14, and ensures good conductivity.

[0053] In this embodiment, two sets of positioning heads 1211 are spaced apart, and the third connecting part 141 is provided with a corresponding positioning hole 1411. The positioning head 1211 passes through the positioning hole 1411, and the second connecting part 131 abuts between the through ends of the two sets of positioning heads 1211. Specifically, when the first electrode 12, the second electrode 13, and the third electrode 14 are assembled, the third electrode 14 is first supported on the first electrode 12. During this process, the positioning head 1211 passes through the corresponding positioning hole 1411 to achieve positioning between the first electrode 12 and the third electrode 14. Then, the second electrode 13 is supported on the third electrode 14, so that the second connecting part 131 is located between the two sets of positioning heads 1211, and the second connecting part 131 abuts between the through ends of the two sets of positioning heads 1211, thereby achieving effective positioning between the first electrode 12, the second electrode 13, and the third electrode 14.

[0054] For example, each group of positioning heads 1211 has one, and the number of positioning holes 1411 opened on the third connecting part 141 corresponds one-to-one with the number of positioning heads 1211.

[0055] Furthermore, at least one groove 1311 corresponding to the positioning head 1211 is provided on the second connecting part 131, and the positioning head 1211 is located in the groove 1311. The cooperation between the groove 1311 and the positioning head 1211 can increase the welding area between the first connecting part 121 and the second connecting part 131, and ensure a reliable welding effect between the first connecting part 121 and the second connecting part 131.

[0056] Furthermore, the number of positioning heads 1211 is set to two, the distance between the two positioning heads 1211 is a1, and the distance from the bottom of the groove 1311 to the opposite end face of the second connecting part 131 is a2, so a1≥a2. This setting is equivalent to the distance between the two positioning heads 1211 being greater than or equal to the distance from the bottom of the groove 1311 to the opposite end face of the second connecting part 131. This setting ensures that the dimensions of the first connecting part 121 and the second connecting part 131 are matched when assembled, which can ensure that the second connecting part 131 is inserted between the two positioning heads 1211 and a certain gap is left, which facilitates the reliable subsequent welding work.

[0057] In some other alternative embodiments, the third connecting part 141 is provided with a first positioning hole 1411 (not shown), and the second connecting part 131 is provided with a second positioning hole 1411 (not shown). When the first electrode 12, the second electrode 13, and the third electrode 14 are assembled, the third connecting part 141 is fixedly supported on the first connecting part 121, and the second connecting part 131 is fixedly supported on the third connecting part 141. The positioning head 1211 passes through the first positioning hole 1411 and the second positioning hole 1411, thereby also realizing effective positioning between the first electrode 12, the second electrode 13, and the third electrode 14.

[0058] In this embodiment, the positioning head 1211 is formed by bending and extending the edge of the first connecting part 121, which has a simple structure and is easy to form.

[0059] In this embodiment, the first electrode 12 further includes a first support portion 123, which extends onto the first contact portion 122, and the first connecting portion 121 is bent onto the first support portion 123; and / or, the second electrode 13 further includes a second support portion 133, which extends onto the second contact portion 132, and the second connecting portion 131 is bent onto the second support portion 133. Specifically, both the first support portion 123 and the second support portion 133 extend vertically, and both the first connecting portion 121 and the second connecting portion 131 extend horizontally. The arrangement of the first support portion 123 and the second support portion 133 allows for clearance from the varistor 11, creating a certain distance between the first connecting portion 121 and the second connecting portion 131 and the varistor 11, thus providing space for the arrangement of the third electrode 14 and the placement of the third connecting portion 141.

[0060] Furthermore, the first support portion 123 protrudes outward toward the side opposite to the varistor 11. This arrangement allows for a slightly larger gap between the first support portion 123 and the second support portion 133, providing sufficient space for the placement of the third electrode 14 and the third connecting portion 141.

[0061] In this embodiment, the first contact portion 122 is welded to the first side of the varistor 11, and the second contact portion 132 is welded to the second side of the varistor 11; the first connecting portion 121 is welded to the first side of the third connecting portion 141, and the second connecting portion 131 is welded to the second side of the third connecting portion 141. This welding arrangement ensures reliable and effective fixing while also providing reliable conductivity for the aforementioned conductive components.

[0062] This embodiment also provides a surge protector. (Refer to...) Figures 1 to 7 As shown, the surge protector includes the aforementioned varistor 1, and also includes a support 2, an indicator 3, a push rod 4, and an elastic element 5. The varistor 1 is fixed to the support 2. The indicator 3 includes a first drive section 31, a second drive section 32, and an indicator section 33 connected in sequence, with the second drive section 32 inclined away from the support 2. The push rod 4 is movably mounted on the support 2, and the indicator 3 is located between the support 2 and the push rod 4. The push rod 4 has a conductive sheet 41, which is low-temperature soldered to the fourth electrode 15 of the varistor 11, causing the push rod 4 to press against the first drive section 31 to hold the indicator section 33 in the first indicator position. One end of the elastic member 5 is connected to the support member 2, and the other end is connected to the push rod 4. The elastic member 5 is used to drive the push rod 4 to move when the low-temperature solder between the conductive sheet 41 and the fourth electrode 15 melts, so that the conductive sheet 41 and the fourth electrode 15 are separated, and the push rod 4 presses against the second driving part 32 to drive the indicator part 33 to move to the second indicator position.

[0063] In this embodiment, the surge protector uses the aforementioned varistor 1, which has a simple structure and can achieve reliable positioning between the three electrodes without the need for an external positioning structure, thus ensuring good conductivity. Specifically, when the surge protector is in normal working condition, the conductive sheet 41 is soldered to the fourth electrode 15, causing the push rod 4 to press against the first driving part 31, so that the indicator 33 is kept in the first indicator position; when the pressure-sensitive element 1 deteriorates or is overloaded and its temperature rises to the temperature at which the low-temperature alloy solder melts, the aforementioned low-temperature solder melts. At this time, the elastic element 5 drives the push rod 4 to move under the action of elastic force, specifically from above the first driving part 31 to above the second driving part 32. During the process, the pressure on the first driving part 31 is released and the push rod 4 is switched to press against the second driving part 32. Since the second driving part 32 is inclined away from the support member 2 compared to the first driving part 31, when the push rod 4 presses against the second driving part 32, the second driving part 32 moves towards the side closer to the support member 2 and drives the indicator 3 to move, so that the indicator 3 moves from the first indicator position to the second indicator position, thereby realizing the switching of the indicator position.

[0064] Specifically, the support member 2 is also provided with a first conductive contact 22 and a second conductive contact. The first conductive contact 22 is connected to the conductive sheet 41 and is electrically conductive. The third electrode 14 also includes a third contact portion 142 connected to the third connecting portion 141, and the varistor 11 is also provided with a second conductive contact, which is connected to the third contact portion 142. The surge protector is connected to the power circuit through the first conductive contact 22 and the second conductive contact. A conductive path is formed between the first conductive contact 22, the conductive sheet 41, the fourth electrode 15, the varistor 11, the third electrode 14, and the second conductive contact. When the low-temperature solder melts, the conductive sheet 41 separates from the fourth electrode 15, at which time the conductive path between the first conductive contact 22 and the second conductive contact is broken.

[0065] For example, the third contact portion 142 is inserted into the second conductive contact.

[0066] For example, the elastic element 5 is configured as a spring.

[0067] Furthermore, the indicator 3 also includes a hinge shaft 34 disposed between the first drive unit 31 and the second drive unit 32, and the hinge shaft 34 is hinged to the support member 2. Specifically, when the push rod 4 moves from above the first drive unit 31 to above the second drive unit 32, the push rod 4 pushes against the side of the second drive unit 32 near the support member 2 and swings. During this process, the hinge shaft 34 rotates relative to the support member 2 until the second drive unit 32 is in a vertical state, causing the indicator 33 to move from the first indicator position to the second indicator position above the support member 2.

[0068] It is worth mentioning that when the device is in the first indication position, it indicates that the surge protector is in normal working condition. When it is in the second indication position, it indicates that the varistor 1 inside the surge protector has deteriorated or failed, or that the circuit has tripped due to overload.

[0069] Specifically, the support member 2 is provided with a clearance groove 21, which is used for the connection part between the second drive unit 32 and the indicator unit 33 to pass through, so as to avoid interference with the movement of the indicator unit 33.

[0070] Furthermore, the indicator 3 also includes an elastic part 35 disposed between the second drive part 32 and the indicator part 33. Specifically, the elastic part 35 is configured as a thin sheet-like elastic plate. The provision of the elastic part 35 enables the second drive part 32 and the indicator part 33 to have a certain elastic deformation capability, allowing the indicator part 33 to undergo a certain angle change between the second drive part 32 and the second drive part 32 during the swinging process, thus preventing the indicator part 33 from flipping.

[0071] Furthermore, the surge protector has an indicator window 61, and the indicator part 33 has a cutout 331. When in the first indicator position, the cutout 331 and the indicator window 61 are offset; when in the second indicator position, the cutout 331 and the indicator window 61 coincide. Specifically, the indicator window 61 is formed on the housing 6 of the surge protector. When in the first indicator position, refer to... Figure 6 As shown, at this time, the cutout hole 331 and the indicator window 61 are misaligned; when it is in the second indicator position, refer to... Figure 7 As shown, at this time, the cutout hole 331 and the indicator window 61 are in an overlapping state.

[0072] For example, the area of ​​the indicator 33 and the area of ​​the support below the indicator 33 can be painted with different colors to distinguish the indication. Specifically, the indicator 33 can be painted green, and the area of ​​the support below the indicator 33 can be painted red. When in the first indication position, the cutout 331 and the indicator window 61 are offset, and the green part of the indicator 33 is seen through the indicator window 61; when in the second indication position, the cutout 331 and the indicator window 61 are aligned, and the red part of the support below the cutout 331 is seen through the indicator window 61, which facilitates quick differentiation of the indication status.

[0073] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A pressure-sensitive element, characterized in that, include: Varistor (11); The first electrode (12) includes a first connecting portion (121) and a first contact portion (122) connected to each other; The second electrode (13) includes a second connecting part (131) and a second contact part (132) connected together, and the first contact part (122) and the second contact part (132) are fixedly attached to opposite sides of the varistor (11); The third electrode (14) includes a third connecting part (141), which is disposed between the first connecting part (121) and the second connecting part (131). The first connecting part (121) is provided with a positioning head (1211), which is used to position the second connecting part (131) and the third connecting part (141).

2. The pressure-sensitive element according to claim 1, characterized in that, The positioning heads (1211) are arranged in two sets at intervals. The third connecting part (141) is provided with a positioning hole (1411) corresponding to the positioning head (1211) passing through the positioning hole (1411), and the second connecting part (131) abuts between the passing ends of the two sets of positioning heads (1211).

3. The pressure-sensitive element according to claim 2, characterized in that, The second connecting part (131) has at least one groove (1311) corresponding to the positioning head (1211), and the positioning head (1211) is located in the groove (1311).

4. The pressure-sensitive element according to claim 3, characterized in that, The number of positioning heads (1211) is set to two, the distance between the two positioning heads (1211) is a1, and the distance between the bottom of the groove (1311) and the opposite side end face of the second connecting part (131) is a2, then a1≥a2.

5. The pressure-sensitive element according to claim 1, characterized in that, The positioning head (1211) is formed by bending and extending the edge of the first connecting part (121).

6. The pressure-sensitive element according to claim 1, characterized in that, The first electrode (12) further includes a first support portion (123), which extends onto the first contact portion (122), and the first connecting portion (121) is bent onto the first support portion (123); And / or, the second electrode (13) further includes a second support portion (133), the second support portion (133) extending on the second contact portion (132), and the second connecting portion (131) bent on the second support portion (133).

7. The pressure-sensitive element according to claim 1, characterized in that, The first contact portion (122) is welded to the first side of the varistor (11), and the second contact portion (132) is welded to the second side of the varistor (11); The first connecting part (121) is welded to the first side of the third connecting part (141), and the second connecting part (131) is welded to the second side of the third connecting part (141).

8. A surge protector, characterized in that, Including the pressure-sensitive element (1) according to any one of claims 1-7, further comprising: Support member (2), the pressure-sensitive element (1) is fixed on the support member (2); The indicator (3) includes a first drive unit (31), a second drive unit (32) and an indicator unit (33) connected in sequence, wherein the second drive unit (32) is inclined in a direction away from the support member (2); A push rod (4) is movably mounted on the support member (2). The indicator (3) is located between the support member (2) and the push rod (4). A conductive sheet (41) is provided on the push rod (4). The conductive sheet (41) is connected to the fourth electrode (15) of the varistor (11) by low-temperature soldering, so that the push rod (4) presses against the first driving part (31) to keep the indicator part (33) in the first indicating position. An elastic element (5) is connected at one end to the support element (2) and at the other end to the push rod (4). The elastic element (5) is used to drive the push rod (4) to move when the low-temperature solder between the conductive sheet (41) and the fourth electrode (15) melts, so that the conductive sheet (41) and the fourth electrode (15) are separated, and the push rod (4) presses against the second driving part (32) to drive the indicator part (33) to move to the second indicator position.

9. The surge protector according to claim 8, characterized in that, The indicator (3) also includes a hinge shaft (34) disposed between the first drive part (31) and the second drive part (32), and the hinge shaft (34) is hinged to the support member (2).

10. The surge protector according to claim 8, characterized in that, The indicator (3) further includes an elastic part (35) disposed between the second drive part (32) and the indicator part (33).

11. The surge protector according to claim 8, characterized in that, The surge protector has an indicator window (61), and the indicator part (33) is provided with a cutout hole (331); When in the first indicator position, the cutout hole (331) and the indicator window (61) are misaligned; When in the second indicator position, the cutout (331) coincides with the indicator window (61).

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