Linkage mechanism, base and surge protection device

Abstract

The application discloses a linkage mechanism, a base and a surge protection device, wherein the linkage mechanism comprises a linkage swing lever and a transmission component; the linkage swing lever is arranged to be rotatably connected, the linkage swing lever is provided with a triggering part capable of triggering a switch when rotating and at least two stress parts arranged at one side of the rotating axis of the linkage swing lever; wherein one transmission component is arranged corresponding to each stress part, and any one of the transmission components is arranged to exert a pushing force on the stress part to make the linkage swing lever rotate, so that the triggering part triggers the switch. In the surge protection device, the linkage mechanism provided by the application can send a module failure signal when any one of the surge protection modules fails, only one micro switch is arranged, the structure of the surge protection device can be simplified, the volume can be reduced, and the cost can be reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of overvoltage and overcurrent protection, in particular to a linkage mechanism, a base and a surge protection device. BACKGROUND

[0002] Lightning is one of the top ten natural disasters. With the progress of technology, equipment is becoming more and more intelligent and integrated, and more and more sensitive to lightning-caused transient overvoltage - surge. In addition, the start and stop of high-power equipment can also produce surges. Surge protectors (or surge protection devices) can prevent damage to equipment caused by surges and are widely used in communication, construction, rail transit, power, new energy, petroleum and chemical industries. When a sharp current or voltage is generated in an electrical circuit due to lightning or external interference, the surge protector can conduct in a very short time, discharge the current and limit the voltage to a low level, thereby avoiding damage to other equipment in the circuit caused by surges.

[0003] The surge protector for power distribution system includes a surge protection module and a base, the surge protection module is plugged into the base, a pressure sensitive resistor is provided in the surge protection module and is welded with a circuit, the pressure sensitive resistor has a very large resistance under normal working conditions, equivalent to a circuit breaking state, and when the voltage in the circuit exceeds a predetermined value, the resistance of the pressure sensitive resistor sharply decreases and is in a conducting state, which can discharge a large amount of current and limit the overvoltage level. However, after a long period of use, the pressure sensitive resistor will gradually age, the leakage current will gradually increase, the thermal balance will be destroyed, and the temperature of the product will continuously rise. In order to prevent fire accidents caused by overheating of the pressure sensitive resistor, a thermal protection tripping device is usually provided in the surge protector to disconnect the welding of the pressure sensitive resistor and the circuit when the temperature rises. After the pressure sensitive resistor is disconnected from the circuit, the surge protector is already invalid and will lose its protection effect on the equipment. The invalid surge protector is provided with a state indicator to prompt maintenance personnel to replace it in time.

[0004] In some unattended occasions, a remote signaling device is usually designed on the base of the surge protector to realize remote indication of the invalid state of the surge protector.

[0005] At present, two or more surge protection modules are usually plugged into the base in a surge protector, and a remote signaling device needs to be provided for each surge protection module, which not only leads to complex structure and large size of the surge protection module, but also has problems of long production cycle and high cost. SUMMARY

[0006] The purpose of the present application is to solve the problems of complex structure, large size, long production cycle and high cost of the current surge protector.

[0007] To achieve the above objectives, the present invention provides a linkage mechanism, which includes a linkage lever and a transmission component;

[0008] The linkage lever is configured to be rotatably connected, and the linkage lever is provided with an actuating part that can activate the switch when rotated, and at least two force-bearing parts spaced apart on one side of the rotation axis of the linkage lever.

[0009] Each of the force-bearing parts is provided with a transmission component, and any one of the transmission components is configured to apply a thrust to the force-bearing part, causing the linkage lever to rotate, thereby triggering the switch.

[0010] Preferably, the actuating part and the force-receiving part are respectively disposed on opposite sides of the linkage lever.

[0011] Preferably, the transmission component includes a transmission body and a spring connected to the transmission body;

[0012] The transmission main component is configured such that when the transmission main component is restricted by pressure, it does not apply a thrust to the linkage rocker arm, and the spring is compressed to a contracted state by the transmission main component. When the transmission main component is released from the pressure, the spring pushes the transmission main component to move through its elastic force. The movement of the transmission main component applies a thrust to the force-bearing part of the linkage rocker arm, thereby pushing the linkage rocker arm to rotate.

[0013] Preferably, the transmission component includes

[0014] The middle part is configured as the force-receiving part for pushing the linkage lever;

[0015] A first column is located on the side of the middle portion facing the force-bearing portion, and the first column is configured to withstand pressure in a direction away from the force-bearing portion.

[0016] The second column is disposed on the side of the middle part away from the force-bearing part, and the spring is sleeved on the second column.

[0017] According to another aspect of the present invention, a base for a surge protection device is also provided, the base having a plug hole for plugging in a surge protection module, and further including a remote signaling mechanism for indicating the operating status of the surge protection module;

[0018] The remote signaling mechanism includes a micro switch and a linkage mechanism as described above. The surge protection module is configured to be linked with the transmission body of the linkage mechanism. When the surge protection module is in a failed state, the transmission body of the linkage mechanism pushes the linkage lever to rotate under the elastic force of the spring. The linkage lever touches the micro switch, and the micro switch sends a signal indicating that the surge protection module has failed.

[0019] Preferably, the base is further provided with a remote signaling terminal block and a remote signaling connection terminal for connecting to the remote signaling terminal block, wherein the remote signaling terminal block is connected to the micro switch to remotely transmit the signal emitted by the micro switch through the remote signaling terminal block and the remote signaling connection terminal.

[0020] According to another aspect of the present invention, a surge protection device is also provided, the surge protection device comprising at least two surge protection modules and a base as described above, each of the surge protection modules being inserted into a plug hole in the base via a pin, wherein each of the transmission body components on the base corresponds to one of the surge protection modules;

[0021] When one of the surge protection modules is in a failed state, the transmission main component corresponding to that surge protection module pushes the linkage swing arm to rotate, and the linkage swing arm touches the micro switch.

[0022] Preferably, each surge protection module includes a support frame, a varistor mounted on a first side of the support frame, and an electrode connector mounted on a second side of the support frame. The varistor is provided with a first electrode and a second electrode. The first electrode is provided with a first pin for insertion. The second electrode is welded to the electrode connector through an electrode through-hole on the support frame. The electrode connector is provided with a second pin for insertion.

[0023] The surge protection module further includes a tripping mechanism, which includes a rotating body and a storage spring. The rotating body is rotatably mounted on the second side of the support frame. When the electrode connector and the second electrode are in a welding state, the rotating body is restricted to a first position. The storage spring is disposed between the rotating body and the support frame and is in a compressed or stretched storage state. When the solder between the electrode connector and the second electrode melts, the storage spring drives the rotating body to rotate to a second position through its elastic force. In the second position, the rotating body rotates to block the connection between the electrode connector and the second electrode.

[0024] A limiting surface is formed on the rotating body. When the rotating body is in the first position, the limiting surface of the rotating body presses against the transmission main body in the base, causing the transmission main body to be under pressure. The spring on the transmission main body is compressed between the transmission main body and the base, and the micro switch sends a first state signal. When the rotating body rotates to the second position, the transmission main body is released from the pressure of the rotating body. The transmission main body moves under the elastic force of the spring. The transmission main body pushes the corresponding force-bearing part to make the linkage swing rod rotate. The triggering part triggers the micro switch when rotating, and the micro switch sends a second state signal.

[0025] The technical solution provided by this invention can send a module failure signal when any surge protection module fails by setting only one micro switch, without having to set a micro switch for each surge protection module. This not only simplifies the structure of the surge protection device and reduces its size, but also reduces the cost. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of a linkage mechanism with two force-bearing parts according to one embodiment of the present invention;

[0027] Figure 2 This is a schematic diagram of a linkage mechanism with four force-bearing parts according to another embodiment of the present invention;

[0028] Figure 3 This is a schematic diagram of the base of a surge protection device according to one embodiment of the present invention;

[0029] Figure 4 This is a schematic diagram showing the base in a separated state;

[0030] Figure 5 A schematic diagram of the remote signaling mechanism installed in the base;

[0031] Figure 6 This is a schematic diagram showing the connection between two surge protection modules and the base;

[0032] Figure 7 This is a schematic diagram showing the connection between the four surge protection modules and the base;

[0033] Figure 8 For remote signaling agencies to install Figure 7 A schematic diagram of the base shown;

[0034] Figure 9 This is a schematic diagram of the internal structure of the surge protection module (with the tripping mechanism in the first state);

[0035] Figure 10This is a schematic diagram of the internal structure of the surge protection module (the tripping mechanism is in the second state);

[0036] Figure 11 This is a schematic diagram of a varistor mounted on a support frame.

[0037] Figure 12 This is a schematic diagram of a varistor viewed from one side.

[0038] Figure 13 This is a schematic diagram showing the second electrode of the varistor located at the electrode through-hole of the carrier frame;

[0039] Figure 14 This is a cross-sectional structural diagram of a surge protection device (in normal operating condition);

[0040] Figure 15 This is a cross-sectional schematic diagram of a surge protection device (in a failed state).

[0041] Explanation of reference numerals in the attached figures:

[0042] 1-Surge protection module; 11-Housing; 111-Status display hole; 12-Support frame; 121-Electrode through hole; 122-Rotating shaft; 123-First spring connection; 124-First status indicator; 125-Positioning post; 126-Through hole; 127-First support; 128-Second support; 13-Varistor; 131-First electrode; 1311-First pin; 132-Second electrode; 1321-Welding part; 14-Electrode connector; 141-Second pin; 142-Welding end; 143-Positioning groove; 15-Rotating part; 151-Limit 152-Second Status Indicator; 154-Arc Isolation Plate; 155-Second Spring Connection; 16-Storage Spring; 2-Base; 21-Top Cover; 211-Opening; 212-Wiring Hole; 22-Mounting Body; 23-Micro Switch; 24-Linkage Swing Rod; 241-Actuating Part; 242-Force Receiving Part; 243-Rotating Shaft; 25-Transmission Body; 251-Intermediate Part; 252-First Column; 253-Second Column; 26-Spring; 27-First Wiring Board; 28-Second Wiring Board; 29-Wire Press Frame; 3-Remote Signaling Terminal Base; 4-Remote Signaling Connection Terminal. Detailed Implementation

[0043] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the examples set forth herein; rather, they are provided to make this disclosure more comprehensive and complete, and to fully convey the concept of the exemplary embodiments to those skilled in the art. The drawings are merely illustrative of this disclosure and are not necessarily drawn to scale. The same reference numerals in the drawings denote the same or similar parts, and therefore repeated descriptions of them will be omitted.

[0044] Furthermore, the described features, structures, or characteristics can be combined in any suitable manner in one or more embodiments. Numerous specific details are provided in the following description to give a full understanding of embodiments of this disclosure. However, those skilled in the art will recognize that the technical solutions of this disclosure can be practiced with one or more of the specific details omitted, or other methods, components, apparatuses, steps, etc., can be employed. In other instances, well-known structures, methods, apparatuses, implementations, materials, or operations are not shown or described in detail to avoid obscuring various aspects of this disclosure.

[0045] For ease of explanation, spatial relative terms such as “up,” “down,” “left,” and “right” may be used herein to describe the relationship of one element or feature shown in the figures relative to another element or feature. It should be understood that, in addition to the orientations shown in the figures, spatial terms are intended to include different orientations of the device in use or operation. For example, if the device in the figure is inverted, an element described as being “down” of another element or feature would be positioned “up” of that other element or feature. Therefore, the exemplary term “down” can encompass both up and down orientations. The device may also be positioned in other ways, such as rotated 90 degrees or in other orientations, and the spatial relative descriptions used herein will be interpreted accordingly.

[0046] This invention provides a linkage mechanism, such as Figure 1 and Figure 2 As shown, the linkage mechanism includes a linkage lever 24 and a transmission component;

[0047] The linkage lever 24 is configured to be rotatably connected, such as... Figure 1 The display shows that the linkage lever 24 is provided with a rotating shaft 243, through which it can be rotatably connected to other structures. The linkage lever 24 is provided with an actuating part 241 that can activate a switch when rotated, and at least two force-receiving parts 242 are spaced apart on one side of the rotation axis of the linkage lever 24.

[0048] Each of the force-receiving parts 242 is provided with a transmission component. The transmission component is configured such that when any one of the transmission components applies a pushing force to the force-receiving part 242, the linkage lever 24 rotates, thereby triggering the switch by the actuating part 241. Figure 1 The image shows that the linkage lever 24 has two force-receiving parts 242. Figure 2 The image shows that the linkage lever 24 has four force-receiving parts 242. Of course, other numbers of force-receiving parts can also be provided, and a transmission component is provided for each force-receiving part 242.

[0049] The linkage lever provided by this invention is suitable for use in the remote signaling mechanism of a surge protection device. When at least two surge protection modules 1 are installed on the base 2 of the surge protection device, if any one of the surge protection modules fails (i.e., the varistor in the surge protection module is disconnected from the circuit), the tripping mechanism in the surge protection module 1 is activated. The activation of the tripping mechanism is transmitted to the transmission component corresponding to the surge protection module 1. The transmission component pushes a force-receiving part 242 of the corresponding linkage lever 24, thereby causing the linkage lever 24 to rotate and trigger a switch (usually a micro switch), sending a signal that the surge protection module has failed.

[0050] In other words, by incorporating the linkage mechanism provided by this invention into the surge protection device, only one microswitch is needed to issue a module failure signal when any surge protection module fails, without the need to set up a microswitch for each surge protection module. This not only simplifies the structure of the surge protection device and reduces its size, but also reduces costs.

[0051] Preferably, the actuating part 241 and the force-receiving part 242 are respectively disposed on opposite sides of the linkage lever 24. When the force-receiving part 242 flips in one direction (e.g., upward), the actuating part 241 flips in the opposite direction (e.g., downward), thereby actuating the switch.

[0052] In a preferred embodiment, the transmission component includes a transmission body 25 and a spring 26 connected to the transmission body 25;

[0053] The transmission main component 25 is configured such that when the transmission main component 25 is restricted by pressure, such as Figure 1 and Figure 2 When a downward pressure is applied to the transmission main frame 25, the transmission main frame 25 does not apply a thrust to the linkage rocker arm 24, and the spring 26 is compressed to a contracted state by the transmission main frame 25. When the transmission main frame 25 is released from the pressure, the spring 26 pushes the transmission main frame 25 to move through its elastic force. Figure 1 and Figure 2(Moving upwards), the movement of the transmission main body 25 applies a thrust to the force-receiving part 242 of the linkage rocker arm 24, thereby pushing the linkage rocker arm 24 to rotate.

[0054] Preferably, the transmission main body 25 includes:

[0055] The middle part 251 is configured as the force-receiving part 242 for pushing the linkage lever 24;

[0056] The first column 252 is located on the side of the middle part 251 facing the force-bearing part, and the first column 252 is configured to withstand pressure in a direction away from the force-bearing part 242.

[0057] The second column 253 is disposed on the other side of the middle part 251, and the spring 26 is sleeved on the second column 253.

[0058] In this way, when pressure is applied to the first column 252 in a direction away from the force-bearing part 242, the middle part 251 disengages from the force-bearing part 242 of the linkage lever 24, preventing the linkage lever 24 from rotating, and at the same time, the spring 26 sleeved on the second column 253 is compressed by the middle part 251 to contract.

[0059] After the pressure applied to the first column 252 is removed, the middle part 251 moves toward the force-receiving part 242 under the elastic force of the spring 26, thereby pushing the corresponding force-receiving part 251 and causing the swing rod 24 to rotate.

[0060] According to another aspect of the present invention, a base 2 for a surge protection device is also provided, the base 2 having a plug hole for a surge protection module 1 to be plugged in, and further including a remote signaling mechanism for indicating the working status of the surge protection module 1;

[0061] Figure 3 and Figure 4 This is a schematic diagram of the structure of base 2. Figure 6 This is a schematic diagram showing the two surge protection membrane blocks 1 being inserted into the base 2; Figure 5 and Figure 8 This is a schematic diagram showing a remote signaling mechanism mounted on a base. Figure 7 This is a schematic diagram showing the four surge protection modules plugged into the base 2.

[0062] like Figure 4 and Figure 5As shown, the remote signaling mechanism includes a micro switch 23 and a linkage mechanism as described above. The surge protection module 1 is configured to be linked with the transmission body 25 of the linkage mechanism. When one of the surge protection modules 1 is in a failed state, the corresponding transmission body 25 pushes the linkage lever 24 to rotate under the elastic force of the spring 26. The linkage lever 24 touches the micro switch 23, and the micro switch 23 sends a signal indicating that the surge protection device has failed.

[0063] Specifically, the base 2 includes a mounting body 22 and an upper cover 21 covering the mounting body 22. The upper cover 21 can be fixed to the mounting body 22 by snap-fit ​​or other means. A first terminal block 27 and a second terminal block 28 are mounted on the mounting body 22. A limiting groove can be provided on the mounting body 22 to limit the first terminal block 28 and the second terminal block 29. The first terminal block 28 and the second terminal block 29 are respectively provided with plug holes for two pins of each surge protection module 1. The upper cover 21 is provided with an opening 211 corresponding to the plug holes on the first terminal block 27 and the second terminal block 28. The plug holes on the first terminal block 27 and the second terminal block 28 and the corresponding opening 211 on the upper cover 21 form plug holes for the pins of the surge protection module 1 to be plugged in. The first terminal block 27 and the second terminal block 28 are electrically connected to the line through the wire clamping frame 29 and the bolts provided on it. Specifically, the line can be electrically connected to the first terminal block 27 and the second terminal block 28 through the wiring hole 212 above the base 2.

[0064] like Figure 5 As shown, the micro switch 23 in the remote signaling mechanism is fixedly mounted on the mounting body 22 of the base 2; the linkage lever 24 is rotatably mounted on the mounting body 22 via a rotating shaft 243, and the actuating part 241 of the linkage lever 24 corresponds to the micro switch 23. A transmission body component 25 is provided for each force-bearing part 242 of the linkage lever 24, and a spring 26 is provided between the transmission body component 25 and the mounting body 22. The connection between the transmission body component 25 and the spring 26 is as follows: Figure 1 As shown, the first column 252 of the transmission main body 25 extends upward from the housing 21 of the base 2 (as shown). Figure 3As shown, when the surge protection module 1 is installed on the base 1, the tripping mechanism in the surge protection module 1 can apply pressure to the first main body 252. When the surge protection module 1 fails and the tripping mechanism changes state, the pressure acting on the transmission main body 25 is eliminated. The transmission main body 25 moves upward under the elastic force of the spring 26, thereby pushing the force-receiving part 242 of the linkage lever 24 upward. The linkage lever 24 rotates and causes the trigger part 241 to trigger the micro switch 23, sending a signal that the surge protection module 1 has failed. Regardless of how many surge protection modules 1 are installed on the base 1, the linkage lever 24 will trigger the micro switch 23 when any one of the surge protection modules 1 fails.

[0065] in, Figure 5 The linkage lever 24 installed on the base corresponds to two transmission main components 25. Figure 8 The linkage lever 24 installed on the base corresponds to the four transmission main components 25.

[0066] In this embodiment, the base 2 is further provided with a remote signaling terminal block 3 and a remote signaling connection terminal 4 for connecting to the remote signaling terminal block 3. The remote signaling terminal block 3 is connected to the micro switch 23 so as to remotely transmit the signal emitted by the micro switch 23 through the remote signaling terminal block 3 and the remote signaling connection terminal 4.

[0067] According to another aspect of the present invention, a surge protection device is also provided, the surge protection device comprising a surge protection module 1 and a base 2 as described above;

[0068] Each surge protection module 1 is inserted into the insertion hole of the base 2 via a pin, wherein each of the transmission main components 25 on the base 2 corresponds to one surge protection module 1;

[0069] When one of the surge protection modules 1 is in a failed state, the transmission main body 25 corresponding to the surge protection module 1 pushes the linkage swing rod 24 to rotate, and the linkage swing rod 24 touches the micro switch 23.

[0070] Specifically, such as Figure 9 and Figure 10 As shown, each surge protection module 1 includes a support frame 12, a varistor 13 mounted on a first side of the support frame 12, and an electrode connector 14 mounted on a second side of the support frame 12. The varistor 13 is provided with a first electrode 131 and a second electrode 1323. The structure of the varistor 13 is as follows: Figure 11 and Figure 12As shown, the first electrode 131 is provided with a first pin 1311 for insertion, and the second electrode 132 is welded to the electrode connector 14 through an electrode through hole 121 on the support frame 12. The second electrode 132 is provided with a welding portion 1321 protruding towards the electrode through hole 121 (see reference). Figure 12 and 13 The welding end 142 of the electrode connector 14 is welded to the welding part 1321. The electrode connector 14 is positioned on the support frame 12 through the positioning groove 143 provided thereon and the positioning post 125 on the support frame 12. The electrode connector 14 is provided with a second pin 141 for insertion. The first pin 1311 and the second pin 141 are used to insert into the insertion hole of the base 2.

[0071] The surge protection module also includes a tripping mechanism, which includes a rotating body 15 and a accumulating spring 16. The rotating body 15 is rotatably mounted on the second side of the support frame 12 via a rotating shaft 122. When the electrode connector 14 is welded to the second electrode 132, the rotating body 15 is restricted to a first position. The accumulating spring 16 is disposed between the rotating body 15 and the support frame 12 and is in a compressed or stretched accumulating state. Specifically, one end of the accumulating spring 16 is connected to the first spring connecting part 123 of the support frame 12, and the other end is connected to the second spring connecting part 155 of the rotating body 15.

[0072] When the solder between the electrode connector 14 and the second electrode 132 melts, the energy storage spring 16 drives the rotating body 15 to rotate to a second position through its elastic force. In the second position, the rotating body 15 rotates to block the connection between the electrode connector 14 and the second electrode 132. The rotating body 15 is provided with an arc-blocking plate 154. In the second position, the arc-blocking plate 154 on the rotating body 15 is located at the electrode through hole 121, realizing the arc-extinguishing function and cutting off any possible solder adhesion, making the tripping more reliable.

[0073] like Figure 14 As shown, a limiting surface 151 is formed on the rotating body 15. The first column 252 of the transmission main body 25 in the base 2 passes through the upper cover 21 of the base 2 and contacts the limiting surface 151 through the through hole 126 on the support frame 12. When the rotating body 151 is in the first position, the limiting surface 151 of the rotating body 15 presses on the first column 252 of the transmission main body 25, so that the transmission main body 25 is in a compressed state. The spring 26 is compressed between the transmission main body 25 and the base 2, and the micro switch 23 sends out a first state signal.

[0074] like Figure 15As shown, when the surge protection module fails and the rotating body 15 rotates to the second position, the transmission main body 25 is released from the pressure of the rotating body 15. The transmission main body 25 moves under the elastic force of the spring 26. The transmission main body 15 pushes the corresponding force-receiving part 242 to make the linkage swing rod 24 rotate. When the linkage swing rod 241 rotates, the trigger part 241 triggers the micro switch 23, and the micro switch 23 sends out the second state signal.

[0075] The surge protection module 1 also includes a housing 11, such as Figure 9 and Figure 10 As shown, the housing 11 is provided with a status display hole 111; the support frame 12 is provided with a first status indicator 124. When the rotating body 15 is in the first position, the status display hole 111 displays the first status indicator 124, indicating that the surge protection module 1 is in normal working condition; the rotating part 15 is provided with a second status indicator 152. When the rotating body 15 rotates to the second position, the status display hole 111 displays the second status indicator 152, indicating that the surge protection module 1 is in a failed state.

[0076] Those skilled in the art will understand that the tripping mechanism in the surge protection module 1 that cooperates with the base 2 is not limited to the structural form described above in this embodiment. Other forms of tripping mechanisms that can change state to isolate the electrode connector 14 and the second electrode 132 when the solder between the electrode connector 14 and the second electrode 132 melts are also acceptable. For example, a translation component that can translate relative to the support frame 12 can be provided, and a spring can be provided between the translation component and the support frame 12. When the electrode connector 14 and the second electrode 132 are in the welding state, the translation component is restricted to a first position, and the spring is in a compressed or stretched storage state. When the welding melts, the translation component moves under the elastic force of the spring to isolate the welded part between the electrode connector 14 and the second electrode 132.

[0077] It is also understood that the transmission components in the linkage mechanism linked with the surge protection module are not limited to... Figure 1 The structure shown can be any other structure that can trigger the action of the transmission component when the tripping mechanism changes state, thereby allowing the transmission component to push the linkage lever 24.

[0078] The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings; however, the present invention is not limited thereto. Within the scope of the inventive concept, various simple modifications can be made to the technical solutions of the present invention, including combinations of various specific technical features in any suitable manner. To avoid unnecessary repetition, the present invention will not describe the various possible combinations separately. However, these simple modifications and combinations should also be considered as the content disclosed in the present invention and are all within the protection scope of the present invention.

Claims

1. A linkage mechanism, characterized in that, The linkage mechanism includes a linkage lever and a transmission component; The linkage lever is configured to be rotatably connected, and the linkage lever is provided with an actuating part that can activate the switch when rotated, and at least two force-bearing parts spaced apart on one side of the rotation axis of the linkage lever. Each of the force-bearing parts is provided with a transmission component. When any one of the transmission components applies a thrust to the force-bearing part, it can cause the linkage swing arm to rotate, thereby triggering the switch to send a signal indicating that the surge protection device has failed. The status display hole provided on the housing indicates whether the surge protection device is in normal working condition or in a failed condition. The actuating part and the force-receiving part are respectively arranged on opposite sides of the linkage lever; The transmission component includes a main transmission component and a spring connected to the main transmission component; The transmission main component is configured such that when the transmission main component is restricted by pressure, the transmission main component does not apply a thrust to the linkage swing rod, and the spring is compressed to a contracted state by the transmission main component. When the transmission main component is released from the pressure, the spring pushes the transmission main component to move through its elastic force. The movement of the transmission main component applies a thrust to the force-bearing part of the linkage swing rod to push the linkage swing rod to rotate. The middle part is configured as the force-receiving part for pushing the linkage lever; A first column is located on the side of the middle portion facing the force-bearing portion, and the first column is configured to withstand pressure in a direction away from the force-bearing portion. The second column is disposed on the side of the middle part away from the force-bearing part, and the spring is sleeved on the second column; When a pressure is applied to the first column in a direction away from the force-bearing part, the middle part disengages from the force-bearing part of the linkage lever, preventing the linkage lever from rotating. At the same time, the spring fitted on the second column is compressed by the middle part and contracts. After the pressure applied to the first column is removed, the middle part moves toward the force-bearing part under the elastic force of the spring, thereby pushing the corresponding force-bearing part and causing the swing arm to rotate.

2. A base for a surge protection device, characterized in that, The base is provided with a plug hole for the pin of the surge protection module to be plugged in, and also includes a remote signaling mechanism for indicating the working status of the surge protection module; The remote signaling mechanism includes a micro switch and a linkage mechanism according to claim 1. The surge protection module is configured to be linked with the transmission body of the linkage mechanism. When the surge protection module is in a failed state, the transmission body of the linkage mechanism pushes the linkage lever to rotate under the elastic force of the spring. The linkage lever touches the micro switch, and the micro switch sends a signal indicating that the surge protection module has failed.

3. The base according to claim 2, characterized in that, The base is also provided with a remote signaling terminal block and a remote signaling connection terminal for connecting to the remote signaling terminal block. The remote signaling terminal block is connected to the micro switch to remotely transmit the signal emitted by the micro switch through the remote signaling terminal block and the remote signaling connection terminal.

4. A surge protection device, characterized in that, The surge protection device includes at least two surge protection modules and a base according to claim 2 or 3, wherein each surge protection module is inserted into a plug hole of the base via a pin, and each of the transmission main components on the base corresponds to one surge protection module; When one of the surge protection modules is in a failed state, the transmission main component corresponding to that surge protection module pushes the linkage swing arm to rotate, and the linkage swing arm touches the micro switch.

5. The surge protection device according to claim 4, characterized in that, Each surge protection module includes a support frame, a varistor mounted on a first side of the support frame, and an electrode connector mounted on a second side of the support frame. The varistor is provided with a first electrode and a second electrode. The first electrode is provided with a first pin for insertion. The second electrode is welded to the electrode connector through an electrode through-hole on the support frame. The electrode connector is provided with a second pin for insertion. The surge protection module further includes a tripping mechanism, which includes a rotating body and a storage spring. The rotating body is rotatably mounted on the second side of the support frame. When the electrode connector and the second electrode are in a welding state, the rotating body is restricted to a first position. The storage spring is disposed between the rotating body and the support frame and is in a compressed or stretched storage state. When the solder between the electrode connector and the second electrode melts, the storage spring drives the rotating body to rotate to a second position through its elastic force. In the second position, the rotating body rotates to block the connection between the electrode connector and the second electrode. A limiting surface is formed on the rotating body. When the rotating body is in the first position, the limiting surface of the rotating body presses on the transmission main body in the base, causing the transmission main body to be under pressure. The spring on the transmission main body is compressed between the transmission main body and the base, and the micro switch sends a first state signal. When the rotating body rotates to the second position, the transmission main body is released from the pressure of the rotating body. The transmission main body moves under the elastic force of the spring. The transmission main body pushes the corresponding force-bearing part to make the linkage swing rod rotate. The triggering part triggers the micro switch when rotating, and the micro switch sends a second state signal.

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