Varistor module and surge protector

Abstract

The present invention provides a varistor module and a surge protector, comprising a base, a micro switch, a shell, a varistor, a first electrode, a second electrode, a first conductive sheet, a second conductive sheet and a support frame arranged in the shell; the varistor, the first electrode and the second electrode are all arranged on the support frame; the varistor is provided with a first conductive terminal and a second conductive terminal; the first conductive sheet is conductively connected to the first conductive terminal in a disconnectable manner and is conductively connected to the first electrode; the second conductive sheet is conductively connected to the second conductive terminal and the second electrode respectively; the first electrode and the second electrode are conductively connected to the circuit in the base; the varistor presses against or disengages from the micro switch to close or open the micro switch. In the varistor and surge protector provided by the present invention, the first conductive sheet and the second conductive sheet are not easily deformed, and the robot can easily grasp and position them, which is convenient for realizing automation, and improves the assembly efficiency, stability and sensitivity of the varistor and the surge protector.

Description

Technical Field

[0001] The present invention belongs to the technical field of overcurrent protection, and more specifically, relates to a voltage-sensitive module and a surge protector. Background Art

[0002] In the power system, there are often overvoltages caused by lightning induction, capacitive load switching on, inductive load switching off, etc. These overvoltages can damage electrical equipment. Surge protectors (SPDs, commonly known as lightning arresters) are usually connected in parallel with electrical equipment in the circuit, using the voltage-sensitive characteristics of SPDs to protect electrical equipment from various overvoltages, especially expensive, precise and uninterruptible electrical equipment, such as communication base station rooms, financial systems, stock trading systems, high-value electrical equipment and other electrical-related equipment and systems. Using surge protectors can protect these equipment and systems from transient overvoltages caused by lightning or other reasons.

[0003] The varistor in the prior art includes a shell, an electrode, a braided belt and a varistor, wherein the electrode is arranged on the shell for conductive connection with the electrical equipment; the braided belt includes multiple conductive wires, the varistor is arranged in the shell, and the two ends of the braided belt are conductively connected to the electrode and the varistor respectively; when the braided belt is used to conductively connect the electrode and the varistor, since the braided belt has a large plasticity and is composed of multiple conductive wires, it is not easy to be grasped by a robot arm and is not easy to position, so manual operation is required, resulting in low efficiency and high cost of the conductive connection between the electrode and the varistor, thereby reducing the assembly efficiency of the varistor module and increasing the assembly production cost of the varistor module. Summary of the invention

[0004] The object of the present invention is to provide a varistor module and a surge protector to solve the technical problem of low assembly efficiency of the varistor module in the prior art.

[0005] To achieve the above object, the technical solution adopted by the present invention is: to provide a pressure-sensitive module, including a housing, a pressure-sensitive resistor, a first electrode, a second electrode, a first conductive sheet, a second conductive sheet and a support frame arranged in the housing;

[0006] The varistor, the first electrode and the second electrode are all arranged on the support frame;

[0007] The varistor is provided with a first conductive terminal and a second conductive terminal;

[0008] The first conductive sheet is detachably conductively connected to the first conductive terminal and is conductively connected to the first electrode; the second conductive sheet is conductively connected to the second conductive terminal and the second electrode respectively.

[0009] Furthermore, the first electrode is clamped on the support frame and cooperates with the support frame to clamp the first conductive sheet;

[0010] The second electrode is clamped on the support frame and cooperates with the support frame to clamp the second conductive sheet.

[0011] Furthermore, the support frame is provided with a first card slot and a second card slot, the first electrode is provided with a first card protrusion, and the second electrode is provided with a second card protrusion;

[0012] The first latching protrusion can be latched in the first latching slot, and the second latching protrusion can be latched in the second latching slot.

[0013] Furthermore, a communication hole is provided on a side of the support frame, and a connection end of the first conductive sheet and the first conductive terminal is provided on two sides of the support frame;

[0014] The first conductive sheet and / or the first conductive terminal extend into the connecting hole so that the first conductive sheet and the first conductive terminal are disconnectably connected.

[0015] Furthermore, it also includes a spring and a rotating sheet rotatably arranged on the support frame, wherein the spring is arranged on a side of the support frame opposite to the varistor;

[0016] The spring is connected to the rotating sheet and the supporting frame respectively;

[0017] Under the elastic force of the spring, the rotating piece abuts against the disconnectable position of the first conductive piece and the first conductive terminal.

[0018] Furthermore, the housing is provided with an observation hole, the rotating sheet is provided with a marking area, and the marking area is provided with at least two different colors;

[0019] When the spring drives the rotating piece to rotate, the color change of the marking area can be observed through the observation hole.

[0020] Further, a portion of the first conductive sheet located on a side surface of the support frame is separated from the support frame.

[0021] Furthermore, two opposite sides of the shell are provided with avoidance grooves, and the first electrode and the second electrode extend out of the avoidance grooves respectively.

[0022] The present invention also provides a surge protector, comprising a base, a micro switch and the pressure-sensitive module described in any one of the above technical solutions, wherein the micro switch is arranged on the base;

[0023] The base is provided with a plug-in position, and the pressure-sensitive module is plugged into the plug-in position;

[0024] The first electrode and the second electrode are both conductively connected to the circuit in the base;

[0025] The pressure-sensitive module presses the micro switch to close the micro switch;

[0026] When the first conductive sheet is disconnected from the first conductive terminal, the pressure-sensitive module is separated from the micro switch to change the state of the micro switch.

[0027] Furthermore, it also includes a positioning column arranged on the plug-in position, and the pressure-sensitive module is provided with a positioning hole, and the positioning column can extend into the positioning hole.

[0028] The beneficial effects of the varistor and surge protector provided by the present invention are as follows: compared with the prior art, when the varistor of the present invention is subjected to an excessive voltage, the varistor can perform voltage clamping and absorb excess current to protect electrical equipment; the first conductive sheet is disconnectably conductively connected to the first conductive terminal on the varistor, and the second conductive sheet is conductively connected to the second conductive terminal on the varistor. When the voltage from the first conductive sheet through the first conductive terminal is too high, the first conductive sheet and the first conductive terminal will be disconnected due to overload heating of the varistor, thereby causing the micro switch in the surge protector to change state and transmit fault information of the surge protector to the user so that the user can handle it in time; the first electrode and the second electrode facilitate conductive connection of the varistor with the external circuit, simplifying the conductive connection method of the varistor with the external circuit; since the first conductive sheet and the second conductive sheet are respectively an integral whole, compared with the braided belt in the prior art, the first conductive sheet and the second conductive sheet are not easy to deform, and are easy to grasp and position, so they can be grasped or positioned with the assistance of a machine to achieve automated assembly, improve the assembly efficiency of the varistor, and also improve the stability and sensitivity of the varistor. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0030] Figure 1 A schematic diagram of the structure of a surge protector provided by an embodiment of the present invention;

[0031] Figure 2 for Figure 1 The schematic diagram of the partial structure of the surge protector shown Figure 1 ;

[0032] Figure 3for Figure 1 The schematic diagram of the partial structure of the surge protector shown Figure 2 ;

[0033] Figure 4 for Figure 1 Structural diagram of the medium pressure sensitive module;

[0034] Figure 5 for Figure 4 The local structure of the pressure-sensitive module shown Figure 1 ;

[0035] Figure 6 for Figure 4 The local structure of the pressure-sensitive module shown Figure 2 ;

[0036] Figure 7 for Figure 4 A schematic diagram of the structure of the middle and upper shell;

[0037] Figure 8 It is a schematic diagram of the structure of the varistor and the second conductive sheet.

[0038] Among them, the reference numerals in the figure are:

[0039] 1. Pressure-sensitive module; 11. Shell; 111. Upper shell; 1111. Observation hole; 1112. Avoidance groove; 112. Lower shell; 1121. Through groove; 12. Varistor; 121. First conductive terminal; 13. First electrode; 131. First latching protrusion; 14. Second electrode; 141. Second latching protrusion; 15. First conductive sheet; 16. Second conductive sheet; 17. Support frame; 171. First latching slot; 172. Second latching slot; 173. Connecting hole; 18. Spring; 19. Rotating sheet; 191. Marking area; 2. Base; 21. Plug-in position; 211. Slot; 3. Micro switch; 4. Positioning column; 5. Abutment column. DETAILED DESCRIPTION

[0040] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0041] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0042] It should be understood that the orientation or position relationship indicated by terms such as "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0043] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0044] See also Figure 4 , Figure 6 and Figure 8 The pressure-sensitive module provided by the present invention is now described. The pressure-sensitive module includes a housing 11, a varistor 12, a first electrode 13, a second electrode 14, a first conductive sheet 15, a second conductive sheet 16, and a support frame 17 disposed in the housing 11;

[0045] The varistor 12, the first electrode 13 and the second electrode 14 are all arranged on the support frame 17;

[0046] The varistor 12 is provided with a first conductive terminal 121 and a second conductive terminal (not shown in the figure);

[0047] The first conductive sheet 15 is detachably conductively connected to the first conductive terminal 121 and conductively connected to the first electrode 13 ; the second conductive sheet 16 is conductively connected to the second conductive terminal and the second electrode 14 , respectively.

[0048] Compared with the prior art, the varistor 12 provided by the present invention can perform voltage clamping when subjected to excessive voltage, absorbing excess current to protect electrical equipment; the first conductive sheet 15 is disconnectably conductively connected to the first conductive terminal 121 on the varistor 12, and the second conductive sheet 16 is conductively connected to the second conductive terminal on the varistor 12. When the voltage from the first conductive sheet 15 through the first conductive terminal 121 is too high, the first conductive sheet 15 and the first conductive terminal 121 are disconnected due to overload and heating of the varistor 12, thereby causing the micro switch 3 in the surge protector to switch state. state, transmitting the fault information of the surge protector to the user so that the user can handle it in time; the first electrode 13 and the second electrode 14 facilitate the conductive connection between the pressure-sensitive module 1 and the external circuit, simplifying the conductive connection method between the pressure-sensitive module 1 and the external circuit; since the first conductive sheet 15 and the second conductive sheet 16 are respectively an integral whole, compared with the braided belt in the prior art, the first conductive sheet 15 and the second conductive sheet 16 are not easy to deform, easy to grasp and position, and therefore can be grasped or positioned with the assistance of a machine to realize automated assembly, thereby improving the assembly efficiency of the pressure-sensitive module 1, and at the same time also improving the stability and sensitivity of the pressure-sensitive module 1.

[0049] Specifically, the thickness of the first conductive sheet 15 and the second conductive sheet 16 are both in the range of 0.3 mm to 10 mm.

[0050] Specifically, the first conductive sheet 15 and the first conductive terminal 121 are soldered by low-temperature solder. When the varistor 12 is overloaded and heated, the low-temperature solder melts and the first conductive sheet 15 and the first conductive terminal 121 are disconnected.

[0051] For further information, see Figure 5 and Figure 6 As a specific embodiment of the pressure-sensitive module provided by the present invention, the first electrode 13 is clamped on the support frame 17, and cooperates with the support frame 17 to clamp the first conductive sheet 15. When assembling the pressure-sensitive module 1, the first electrode 13 can be directly clamped on the support frame 17 by pressing, pushing, etc., and it is only necessary to place the first conductive sheet 15 between the support frame 17 and the first electrode 13. When the first electrode 13 is clamped on the support frame 17, the first conductive sheet 15 will be abutted to clamp the first conductive sheet 15 through the first electrode 13 and the support frame 17, so that the first conductive sheet 15 is conductively connected to the first electrode 13, which simplifies the connection method and improves the assembly efficiency;

[0052] The second electrode 14 is clamped on the support frame 17 and cooperates with the support frame 17 to clamp the second conductive sheet 16. When assembling the pressure-sensitive module 1, the second electrode 14 can be directly clamped on the support frame 17 by pressing, pushing, etc., and it is only necessary to place the second conductive sheet 16 between the support frame 17 and the second electrode 14. When the second electrode 14 is clamped on the support frame 17, the second conductive sheet 16 will be abutted to clamp the second conductive sheet 16 through the cooperation of the second electrode 14 and the support frame 17, so that the second conductive sheet 16 is conductively connected to the second electrode 14, which simplifies the connection method and improves the assembly efficiency.

[0053] For further information, see Figure 5 and Figure 6 As a specific embodiment of the pressure-sensitive module provided by the present invention, the support frame 17 is provided with a first card slot 171 and a second card slot 172, the first electrode 13 is provided with a first card protrusion 131, and the second electrode 14 is provided with a second card protrusion 141;

[0054] The first latching protrusion 131 can be latched into the first latching groove 171, and the second latching protrusion 141 can be latched into the second latching groove 172. When assembling the support frame 17, the first electrode 13 and the second electrode 14, it is only necessary to slide the first latching protrusion 131 into the first latching groove 171 and the second latching protrusion 141 into the second latching groove 172, so that the first electrode 13 and the second electrode 14 can be respectively latched onto the support frame 17, thereby improving the assembly efficiency of the pressure-sensitive module 1.

[0055] Specifically, one end of the first card slot 171 and one end of the second card slot 172 are provided with a limit block (not shown in the figure), which is used to limit the sliding of the first card protrusion 131 and the second card protrusion 141 respectively, so that the first card protrusion 131 can only slide in from one end of the first card slot 171, and the second card protrusion 141 can only slide in from one end of the second card slot 172, ensuring the stability of the first electrode 13 and the second electrode 14 being connected to the support frame 17.

[0056] For further information, see Figure 5 , Figure 6 and Figure 8 As a specific embodiment of the pressure-sensitive module provided by the present invention, a connecting hole 173 is provided on the side of the support frame 17, and the connection end of the first conductive sheet 15 with the first conductive terminal 121 and the first conductive terminal 121 are respectively provided on both sides of the support frame 17;

[0057] At least one of the first conductive sheet 15 and the first conductive terminal 121 extends into the connecting hole 173 so that the first conductive sheet 15 and the first conductive terminal 121 can be disconnectably connected. The support frame 17 can isolate the other positions of the varistor 12 except the first conductive terminal 121 from the first conductive sheet 15, thereby preventing the first conductive sheet 15 from conducting electricity with other positions of the varistor 12 except the first conductive terminal 121, thereby preventing damage to the varistor module 1, thereby improving the safety and stability of the varistor 1.

[0058] For further information, see Figure 5 , Figure 6 and Figure 8 , as a specific embodiment of the pressure-sensitive module provided by the present invention, further comprising a spring 18 and a rotating piece 19 rotatably arranged on a support frame 17, wherein the spring 18 is arranged on a side of the support frame 17 opposite to the pressure-sensitive resistor 12;

[0059] The spring 18 is connected to the rotating piece 19 and the supporting frame 17 respectively;

[0060] Under the elastic force of the spring 18, the rotating piece 19 abuts against the disconnectable position of the first conductive piece 15 and the first conductive terminal 121. When a large voltage passes through the varistor module 1, the varistor 12 absorbs excess current, so that the temperature of the connection position between the first conductive piece 15 and the first conductive terminal 121 increases until the varistor 12 is disconnected due to overload and heating. Since the rotating piece 19 abuts against the disconnectable position of the first conductive piece 15 and the first conductive terminal 121 under the elastic force of the spring 18, and the connection position between the first conductive piece 15 and the first conductive terminal 121 that prevents the rotating piece 19 from rotating is disconnected due to overload and heating of the varistor 12, the spring 18 drives the rotating piece 19 to rotate and blocks the connecting hole 173, so as to physically isolate the first conductive piece 15 and the first conductive terminal 121, thereby playing the role of arc extinguishing and increasing the creepage distance, so as to completely prevent the first conductive piece 15 from being electrically connected to the first conductive terminal 121.

[0061] Specifically, the first conductive sheet 15 is welded to the first conductive terminal 121 .

[0062] For further information, see Figure 4 and Figure 5 As a specific embodiment of the pressure-sensitive module provided by the present invention, the housing 11 is provided with an observation hole 1111, the rotating piece 19 is provided with a marking area 191, and the marking area 191 is provided with at least two different colors;

[0063] When the spring 18 drives the rotating piece 19 to rotate, the color change of the identification area 191 can be viewed through the observation hole 1111. The user can observe the color change of the identification area 191 through the observation hole 1111. If the user can see the color indicating the undisconnection on the identification area 191 through the observation hole 1111, it means that the first conductive sheet 15 and the first conductive terminal 121 are not disconnected, and the pressure-sensitive module 1 can still be used normally; if the user can see the color indicating the disconnection on the identification area 191 through the observation hole 1111, it means that the first conductive sheet 15 and the first conductive terminal 121 have been disconnected, causing the spring 18 to drive the rotating piece 19 to rotate, so that the user can see the identification area 191 displays the color indicating the disconnection through the observation hole 1111, and the pressure-sensitive module 1 needs to be replaced at this time; therefore, by setting the observation hole 1111 on the housing 11 and setting the identification area 191 on the rotating piece 19, the user can be informed of the use status of the pressure-sensitive module 1 in time, thereby reminding the user to replace the pressure-sensitive module 1 in time.

[0064] Specifically, the color indicating that the marking area 191 has not been detached is green, and the color indicating that the marking area has been detached is red, so that the user can observe the marking area 191 through the observation hole 1111.

[0065] For further information, see Figure 5 , Figure 6 and Figure 8 As a specific embodiment of the pressure-sensitive module provided by the present invention, the part of the first conductive sheet 15 located on the side of the support frame 17 is separated from the support frame 17, avoiding direct contact between the first conductive sheet 15 and the support frame 17, increasing the creepage distance from the first conductive terminal 121 to the first conductive sheet 15, and reducing the probability of conductive connection between the first conductive sheet 15 and the first conductive terminal 121 in a humid environment, thereby improving the performance of the pressure-sensitive module 1.

[0066] For further information, see Figure 4 , Figure 5 and Figure 7 As a specific embodiment of the pressure-sensitive module provided by the present invention, avoidance grooves 1112 are provided on opposite sides of the shell 11, and the first electrode 13 and the second electrode 14 extend out of the avoidance grooves 1112 respectively, so that the first electrode 13 and the second electrode 14 are conveniently plugged into the electrical equipment, so that the user can replace the pressure-sensitive module 1; and the avoidance grooves 1112 are arranged on opposite sides of the shell 11, so that the electrical equipment can limit the first electrode 13 and the second electrode 14, so that the pressure-sensitive module 1 can be stably plugged into the electrical equipment.

[0067] See also Figure 1 and Figure 2 The present invention further provides a surge protector, which comprises a base 2, a micro switch 3 and the pressure-sensitive module 1 described in any of the above embodiments, wherein the micro switch 3 is arranged on the base 2;

[0068] The base 2 is provided with a plug-in position 21, and the pressure-sensitive module 1 is plugged into the plug-in position 21;

[0069] The first electrode 13 and the second electrode 14 are both conductively connected to the circuit in the base 2;

[0070] The pressure-sensitive module 1 presses the micro switch 3 to keep the micro switch 3 in the initial state;

[0071] When the first conductive sheet 15 is disconnected from the first conductive terminal 121, the pressure sensitive module 1 is separated from the micro switch 3 to change the state of the micro switch 3. At this time, the state of the micro switch 3 is exactly opposite to its initial state, that is, the initial state of normally open is converted to normally closed, and the initial state of normally closed is converted to normally open.

[0072] Compared with the prior art, the surge protector provided by the present invention is convenient for automated assembly because the first conductive sheet 15 and the second conductive sheet 16 are respectively an integral whole, which is convenient for machine grasping or positioning, so as to improve the assembly efficiency of the varistor 1, thereby improving the assembly efficiency of the surge protector; the first electrode 13 and the second electrode 14 are conductively connected to the circuit in the base 2 so as to connect the circuit in the varistor 1 with the circuit in the base 2; when the varistor 1 is plugged into the plug-in position 21 on the base 2, the varistor 1 presses the micro switch 3 so that the micro switch 3 maintains its initial state; when the voltage is too large, the first conductive sheet 15 is disconnected from the first conductive terminal 121, so that the varistor 1 is safely disconnected from the power grid to avoid fire caused by overload and short circuit of the varistor 1, and at the same time, the varistor 1 is separated from the micro switch 3 so that the micro switch 3 changes state, and the information of the failure of the surge protector is transmitted to the background monitoring, prompting the user to replace or maintain the surge protector.

[0073] Specifically, see Figure 2 , Figure 3 and Figure 5 , and also includes a post 5 arranged on the plug-in position 21, the post 5 can move along its axial direction, and the shell 11 is also provided with a through slot 1121, one end of the rotating piece 19 can extend into the through slot 1121, and the two ends of the post 5 are respectively in contact with the micro switch 3 and the rotating piece 19; when the first conductive sheet 15 is disconnected from the first conductive terminal 121, the rotating piece 19 moves in a direction away from the micro switch 3, and the post 5 moves in a direction away from the micro switch 3 to make the micro switch 3 change state.

[0074] Specifically, the housing 11 includes an upper housing 111 and a lower housing 112 covering the upper housing 111 , so as to facilitate installation of the support frame 17 .

[0075] Specifically, the observation hole 1111 and the avoidance groove 1112 are both provided on the upper shell 111 , and the through groove 1121 is provided on the lower shell 112 .

[0076] Specifically, when the first conductive sheet 15 is disconnected from the first conductive terminal 121 , the rotating sheet 19 moves in a direction away from the micro switch 3 driven by the spring 18 .

[0077] Specifically, the three terminals of the micro switch 3 form two circuits of normally open and normally closed. When the pressure sensitive module 1 is inserted into the plug-in position 21, the micro switch 3 is in the initial state (i.e., normally open and normally closed). When the pressure sensitive module 1 is unplugged from the plug-in position 21, the micro switch 3 is converted to another state (i.e., normally closed and normally open).

[0078] Specifically, see Figure 3 and Figure 4 A slot 211 is provided on the plug-in position 21 , and the first electrode 13 and the second electrode 14 can be slidably disposed in the slot 211 to improve the insertion efficiency of the pressure-sensitive module 1 and also improve the stability of the pressure-sensitive module 1 when inserted into the plug-in position 21 .

[0079] For further information, see Figure 5 and Figure 8 As a specific embodiment of the surge protector provided by the present invention, it also includes a positioning column 4 arranged on the plug-in position 21, and a positioning hole (not shown in the figure) is provided on the shell 11. The positioning column 4 can extend into the positioning hole to quickly position the varistor module 1 at the plug-in position 21, thereby improving the efficiency of inserting the varistor module 1 into the plug-in position 21; at the same time, the positioning column 4 also has an anti-mistake effect, avoiding the varistor module 1 from being installed incorrectly and affecting the normal use of the surge protector.

[0080] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A varistor module, comprising a housing and a varistor, characterized in that: It also includes a first electrode, a second electrode, a first conductive sheet, a second conductive sheet and a support frame arranged in the housing; The varistor, the first electrode and the second electrode are all arranged on the support frame; The varistor is provided with a first conductive terminal and a second conductive terminal; The first conductive sheet is detachably conductively connected to the first conductive terminal and conductively connected to the first electrode; the second conductive sheet is conductively connected to the second conductive terminal and the second electrode respectively; The first electrode is clamped on the support frame and cooperates with the support frame to clamp the first conductive sheet; The second electrode is clamped on the support frame and cooperates with the support frame to clamp the second conductive sheet; The support frame is provided with a first clamping slot and a second clamping slot, the first electrode is provided with a first clamping protrusion, and the second electrode is provided with a second clamping protrusion; The first locking protrusion can be locked in the first locking slot, and the second locking protrusion can be locked in the second locking slot; A connecting hole is provided on the side of the support frame, and the connecting end between the first conductive sheet and the first conductive terminal and the first conductive terminal are respectively provided on both sides of the support frame; The first conductive sheet and / or the first conductive terminal extend into the connecting hole so that the first conductive sheet and the first conductive terminal are disconnectably connected.

2. The pressure sensitive module according to claim 1, characterized in that: It also includes a spring and a rotating sheet rotatably arranged on the support frame, wherein the spring is arranged on a side of the support frame opposite to the varistor; The spring is connected to the rotating sheet and the supporting frame respectively; Under the elastic force of the spring, the rotating piece abuts against the disconnectable position of the first conductive piece and the first conductive terminal.

3. The pressure sensitive module according to claim 2, characterized in that: The housing is provided with an observation hole, the rotating sheet is provided with a marking area, and the marking area is provided with at least two different colors; When the spring drives the rotating piece to rotate, the color change of the marking area can be observed through the observation hole.

4. The pressure sensitive module according to claim 2, characterized in that: A portion of the first conductive sheet located on a side surface of the support frame is separated from the support frame.

5. The pressure sensitive module according to claim 1, characterized in that: Avoidance grooves are provided on opposite sides of the shell, and the first electrode and the second electrode extend out of the avoidance grooves respectively.

6. Surge protector, characterized in that: It comprises a base, a micro switch and the pressure-sensitive module according to any one of claims 1 to 5, wherein the micro switch is arranged on the base; The base is provided with a plug-in position, and the pressure-sensitive module is plugged into the plug-in position; The first electrode and the second electrode are both conductively connected to the circuit in the base; The pressure-sensitive module presses the micro switch to keep the micro switch in an initial state; When the first conductive sheet is disconnected from the first conductive terminal, the pressure-sensitive module is separated from the micro switch to change the state of the micro switch.

7. The surge protector according to claim 6, characterized in that: It also includes a positioning column arranged on the plug-in position, and the pressure-sensitive module is provided with a positioning hole, and the positioning column can extend into the positioning hole.

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