A connection structure for a varistor and a thermal protection device, and a surge protector.

Abstract

This invention discloses a surge protector and its connection structure with a varistor and a thermal protection device, comprising: a varistor having a central hole at its center, a first connecting electrode at one end, and a second connecting electrode at the other end; a resistive insulating partition embedded in the central hole of the varistor, the resistive insulating partition also having a central hole; and a thermal protection device including a tripping electrode and a tripping elastic element disposed within the central hole of the insulating partition. The tripping electrode is soldered to the first connecting electrode to form a thermal release point. One end of the tripping elastic element is connected to the resistive insulating partition, and the other end is connected to the tripping electrode to push the tripping electrode away from the first connecting electrode. This invention can improve the response speed of the thermal protection device and reduce the size of the connection structure between the varistor and the thermal protection device while ensuring the current carrying capacity of the varistor.

Description

Technical Field

[0001] This invention relates to the field of surge protector technology, and in particular to a connection structure between a varistor and a thermal protection device, and a surge protector. Background Technology

[0002] Varistors are the core component of surge protectors for low-voltage electrical equipment, and therefore a key factor determining the performance of surge protectors. The core function of a surge protector is protection against lightning and operational overvoltages; high volumetric current carrying capacity and rapid thermal tripping capability are future development requirements. Surge protectors typically employ a structure where the varistor and thermal protection device are connected in series. Sufficient space must be reserved outside the varistor for the thermal protection device during product design.

[0003] The current level of varistor technology can no longer meet the requirements of surge protection for low-voltage electrical equipment, which requires large current carrying capacity, small size, high reliability, and self-protection. To meet these requirements, the industry's usual solution is to increase the voltage gradient of the varistor and reduce its thickness. However, the thermal protection device has always been placed on the outside of the varistor without any breakthrough or improvement.

[0004] Currently, as high-tech equipment such as 5G has increasingly higher power requirements, and power supply equipment is becoming more sophisticated and smaller in size, the requirements for surge protectors are also increasing. The traditional protection solutions of varistors and external thermal protection devices can no longer meet the needs of these devices in terms of size.

[0005] Therefore, how to improve the response speed of the thermal protection device and reduce the volume of the connection structure between the varistor and the thermal protection device while ensuring the current carrying capacity of the varistor is a technical problem that needs to be solved by those skilled in the art. Summary of the Invention

[0006] In view of this, the purpose of the present invention is to provide a connection structure between a varistor and a thermal protection device, so as to improve the response speed of the thermal protection device and reduce the volume of the connection structure between the varistor and the thermal protection device while ensuring the current carrying capacity of the varistor.

[0007] Another object of the present invention is to provide a surge protector having the above-described connection structure of a varistor and a thermal protection device.

[0008] To achieve the above objectives, the present invention provides the following technical solution:

[0009] A connection structure for a varistor and a thermal protection device, comprising:

[0010] A varistor, wherein a varistor center hole is provided in the center of the varistor, a first connecting electrode is provided at one end of the varistor, and a second connecting electrode is provided at the other end;

[0011] A resistive insulating partition is embedded in the central hole of the varistor, and the resistive insulating partition has a central insulating partition hole;

[0012] The thermal protection device includes a tripping electrode and a tripping elastic element disposed in the central hole of the insulating partition. The tripping electrode is connected to the first connecting electrode by solder to form a thermal separation point. One end of the tripping elastic element is connected to the resistive insulating partition, and the other end is connected to the tripping electrode to push the tripping electrode to move away from the first connecting electrode.

[0013] Optionally, in the above-mentioned connection structure of varistor and thermal protection device, the thermal protection device further includes a tripping electrode partition, and the tripping elastic element is connected to the tripping electrode through the tripping electrode partition;

[0014] The tripping electrode partition is fixedly connected to the tripping electrode.

[0015] Optionally, in the above-mentioned connection structure of varistor and thermal protection device, the tripping electrode includes a tripping electrode base plate and a tripping electrode terminal connected to the tripping electrode base plate, and the tripping electrode base plate is connected to the first connecting electrode by solder to form a thermal detachment point;

[0016] The tripping electrode partition includes a tripping partition cylinder and a tripping partition positioning part. The tripping partition cylinder is sleeved on the outside of the tripping electrode terminal. The first end of the tripping electrode partition is fixed to the tripping electrode base plate. The tripping partition positioning part is disposed on the tripping electrode partition and is used to abut against the tripping elastic element.

[0017] Optionally, in the above-mentioned connection structure of varistor and thermal protection device, the resistive insulating partition has an annular groove, the tripping elastic element is disposed in the annular groove, the positioning part of the tripping partition extends into the annular groove and abuts against the tripping elastic element.

[0018] Optionally, in the above-described connection structure between the varistor and the thermal protection device, the resistive insulating partition includes:

[0019] An insulating partition outer sleeve is fitted to the inner wall of the central hole of the varistor;

[0020] An inner sleeve of the insulating partition is located inside the outer sleeve of the insulating partition and forms the annular groove between them. The ends of the outer sleeve and the inner sleeve near the first connecting electrode are connected by a bottom plate of the insulating partition. The bottom plate of the insulating partition is supported on the first connecting electrode. One end of the tripping elastic element abuts against the bottom plate of the insulating partition. A sliding groove is provided on the inner sleeve of the insulating partition to slide and engage with the positioning part of the tripping partition.

[0021] Optionally, in the above-described connection structure of the varistor and thermal protection device, the resistive insulating partition further includes a resistive insulating cover plate connected to the end of the outer sleeve of the insulating partition that is away from the first connecting electrode, and the resistive insulating cover plate is attached to the second connecting electrode.

[0022] Optionally, in the above-mentioned connection structure of varistor and thermal protection device, there are multiple tripping baffle positioning parts, which are arranged symmetrically along the axis of the tripping baffle cylinder.

[0023] Optionally, in the above-described connection structure between the varistor and the thermal protection device, the outer contour of the varistor is cylindrical, and the central hole of the varistor is a circular hole; or,

[0024] The outer contour of the varistor is a prismatic structure, and the central hole of the varistor is a circular hole; or...

[0025] The outer contour of the varistor is a prismatic structure, and the central hole of the varistor is a square hole.

[0026] Optionally, in the above-mentioned connection structure of varistor and thermal protection device, the melting temperature of the solder between the tripping electrode and the first connecting electrode is a first temperature;

[0027] The melting temperature of the solder between the varistor and the first connecting electrode and the second connecting electrode is the second temperature;

[0028] The first temperature is not greater than the second temperature, and the difference between the first temperature and the second temperature is less than a preset value.

[0029] The varistor and thermal protection device connection structure provided by this invention features a central hole in the varistor. Due to the skin effect of surge current, the utilization rate of the middle portion of the varistor is low. Therefore, the current-carrying capacity of the varistor can be ensured by adjusting the area of ​​the central hole. A resistive insulating partition with a central hole is placed inside the central hole of the varistor, and the thermal protection device is housed within this central hole. In other words, this invention places the thermal protection device inside the central hole of the varistor, so the heat generated by the varistor can directly heat the thermal protection device. By adjusting the solder material and solder area of ​​the thermal protection device, the thermal tripping response speed and solder joint strength of the thermal protection device under overload conditions can be adjusted. This ensures both the current-carrying capacity of the varistor and improves the response speed of the thermal protection device. Furthermore, by using an internal hole in the varistor to install the thermal protection device, space is saved compared to an externally installed thermal protection device. This structure also saves space, increases the volumetric current-carrying capacity ratio of the final product, and facilitates miniaturization of the final product.

[0030] A surge protector includes a varistor and thermal protection device connection structure as described in any of the preceding claims.

[0031] The surge protector provided by the present invention has all the technical effects of the above-mentioned varistor and thermal protection device connection structure, which will not be repeated here. Attached Figure Description

[0032] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0033] Figure 1 A cross-sectional view of the connection structure between the varistor and the thermal protection device in normal state, provided in an embodiment of the present invention;

[0034] Figure 2 This is a cross-sectional view of the connection structure between the varistor and the thermal protection device in the tripping state provided in an embodiment of the present invention;

[0035] Figure 3 This is a cross-sectional view of the connection structure between the tripping electrode and the tripping electrode partition provided in an embodiment of the present invention;

[0036] Figure 4 This is a cross-sectional view of the connection structure between the resistive insulating partition and the tripping electrode partition provided in an embodiment of the present invention;

[0037] Figure 5 This is a schematic diagram of the connection structure between the varistor and the thermal protection device provided in an embodiment of the present invention.

[0038] The meanings of the various reference numerals in the figure are as follows:

[0039] 101 is a varistor;

[0040] 102 is a resistance insulating partition, 1021 is an annular groove, 1022 is an outer sleeve of the insulating partition, 1023 is an inner sleeve of the insulating partition, 1024 is a resistance insulating cover plate, and 1025 is a bottom plate of the insulating partition.

[0041] 103 is the second connecting electrode;

[0042] 104 is the first connecting electrode;

[0043] 105 is the trip electrode, 1051 is the trip electrode terminal, and 1052 is the trip electrode base plate.

[0044] 106 is the tripping electrode partition, 1061 is the tripping partition cylinder, 1062 is the tripping partition positioning part; 107 is the tripping elastic element. Detailed Implementation

[0045] The core of this invention is to provide a connection structure between a varistor and a thermal protection device, so as to improve the response speed of the thermal protection device and reduce the volume of the connection structure between the varistor and the thermal protection device while ensuring the current carrying capacity of the varistor.

[0046] Another core aspect of this invention is to provide a surge protector having the aforementioned connection structure of a varistor and a thermal protection device.

[0047] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0048] like Figure 1 As shown, an embodiment of the present invention discloses a connection structure for a varistor and a thermal protection device, including a varistor 101, a resistive insulating partition 102, and a thermal protection device.

[0049] The varistor 101 has a central hole at its center, a first connecting electrode 104 at one end, and a second connecting electrode 103 at the other end. Specifically, the first connecting electrode 104 and the second connecting electrode 103 can be soldered to the end faces of both ends of the varistor 101.

[0050] A central hole is provided at the center of the varistor 101. Due to the skin effect of surge current, that is, when there is alternating current or alternating electromagnetic field in a conductor, the current distribution inside the conductor is uneven, and the current is concentrated in the "skin" part of the conductor. In other words, the current is concentrated in a thin layer on the outer surface of the conductor. The closer to the conductor surface, the greater the current density, while the current inside the conductor is actually smaller. Therefore, setting a central hole in the center of the varistor 101 will not significantly affect the current-carrying capacity of the varistor. Only by slightly increasing the outer dimensions of the varistor 101, the current-carrying capacity of the varistor 101 can be guaranteed. Alternatively, by adjusting the composition and voltage gradient of the varistor 101, the surge impact capability of the varistor 101 can be guaranteed without increasing the volume of the connection structure between the varistor 101 and the thermal protection device.

[0051] The resistive insulating partition 102 is embedded in the central hole of the varistor, and the resistive insulating partition 102 has an insulating partition central hole. The resistive insulating partition 102 can be made of thermally conductive ceramic or similar thermally conductive insulating materials to insulate the thermal protection device from the varistor 101, avoid flashover, breakdown and other defects, and has strong adhesion, temperature resistance and flame retardancy, and a similar coefficient of thermal expansion.

[0052] The thermal protection device includes a tripping electrode 105 and a tripping elastic element 107 disposed in the central hole of an insulating partition. The tripping electrode 105 is connected to the first connecting electrode 104 by solder to form a thermal release point. One end of the tripping elastic element 107 is connected to the resistive insulating partition 102, and the other end is connected to the tripping electrode 105 to push the tripping electrode 105 away from the first connecting electrode 104.

[0053] The solder strength used between the tripping electrode 105 and the first connecting electrode 104 should ensure that it can withstand normal surge impact and normal heating conditions without tripping; when the varistor 101 enters a failure state and heats up abnormally due to transient overvoltage, impact overload, thermal collapse, etc., it should quickly act to quickly separate the tripping electrode 105 from the first connecting electrode 104.

[0054] The tripping electrode 105 and the second connecting electrode 103 are the two electrodes connecting the varistor and thermal protection device to the external environment, respectively connected to the two ends of the equipment or circuit to be protected. That is, the first connecting electrode 104 is connected to the circuit to be protected through the tripping electrode 105. When the tripping electrode 105 is disconnected from the first connecting electrode 104 (e.g., when the tripping electrode 105 is disconnected from the first connecting electrode 104), the tripping electrode 105 will trip. Figure 2 As shown in the diagram, this disconnects the first connecting electrode 104 from the circuit to be protected, thereby achieving the protection effect. The specific thermal tripping of the varistor is the same as in the prior art, and will not be described in detail here.

[0055] like Figure 2 As shown, when the varistor 101 overheats abnormally, the solder between the tripping electrode 105 and the first connecting electrode 104 melts due to the heat. The tripping elastic element 107 provides the power to make the tripping electrode 105 slide along the central hole of the insulating partition of the resistive insulating partition 102, resulting in the separation of the tripping electrode 105 from the first connecting electrode 104, thus realizing the "tripping state".

[0056] The connection structure between the varistor and the thermal protection device provided by the present invention has a varistor center hole in the center of the varistor 101. Since the surge current has a skin effect, the utilization rate of the middle part of the varistor 101 is low. Therefore, the current carrying capacity of the varistor 101 can be guaranteed by adjusting the area of ​​the varistor center hole.

[0057] A resistive insulating partition 102 is disposed within the central hole of the varistor. This insulating partition 102 has a central hole, and a thermal protection device is disposed within this central hole. In other words, this invention places the thermal protection device within the central hole of the varistor, so the heat generated by the varistor 101 can directly heat the thermal protection device. By adjusting the solder material and solder area of ​​the thermal protection device, the thermal tripping response speed and solder joint strength of the thermal protection device when the varistor 101 is overloaded can be adjusted. This ensures the current carrying capacity of the varistor 101 while improving the response speed of the thermal protection device. Furthermore, because the thermal protection device is installed within the varistor 101 through a hole, space is saved for externally installed thermal protection devices. Therefore, this structure also saves space, increases the volumetric current carrying capacity ratio of the final product, and facilitates the miniaturization of the final product.

[0058] In one specific embodiment of the present invention, the thermal protection device may further include a tripping electrode partition 106, and a tripping elastic element 107 is connected to a tripping electrode 105 through the tripping electrode partition 106. The tripping electrode partition 106 is fixedly connected to the tripping electrode 105, thereby driving the tripping electrode 105 to move.

[0059] The trip electrode separator 106 can be made of the same material as the resistor insulation separator 102, that is, made of thermally conductive ceramic or similar thermally conductive insulating materials, to insulate it from the varistor 101. It has good insulation performance and will not cause defects such as flashover or breakdown due to the fixing method. It has strong adhesion and is temperature and flame retardant.

[0060] like Figure 3 As shown, in this embodiment, the tripping electrode 105 includes a tripping electrode base plate 1052 and a tripping electrode terminal 1051 connected to the tripping electrode base plate 1052. The tripping electrode 105 is an integral structure. The tripping electrode base plate 1052 is connected to the first connecting electrode 104 by solder to form a thermal release point. That is, the tripping electrode 105 is provided with a tripping electrode base plate 1052 with a large area, so that it can be easily connected to the first connecting electrode 104 by solder to form a more stable structure, effectively improving the welding strength and reliability of the thermal release point.

[0061] like Figure 3 and Figure 5As shown, the tripping electrode partition 106 includes a tripping partition cylinder 1061 and a tripping partition positioning part 1062. The tripping partition cylinder 1061 is sleeved on the outside of the tripping electrode terminal 1051. The first end of the tripping electrode partition 106 is fixed to the tripping electrode base plate 1052, and the tripping partition positioning part 1062 is disposed on the tripping electrode partition 106 for abutting with the tripping elastic element 107. Specifically, the tripping partition positioning part 1062 can be disposed at the second end of the tripping electrode partition 106. The tripping electrode partition 106 can also be an integral structure. In this embodiment, the tripping partition positioning part 1062 is disposed at the second end of the tripping electrode partition 106, which facilitates abutting with the tripping elastic element 107.

[0062] To facilitate the positioning of the tripping elastic element 107 and prevent it from dislodging from its original position during reset, in a specific embodiment of the present invention, the resistive insulating partition 102 has an annular groove 1021. The tripping elastic element 107 is disposed within the annular groove 1021, and the positioning part 1062 of the tripping partition extends into the annular groove 1021 and abuts against the tripping elastic element 107. The sidewall of the annular groove 1021 has a limiting effect on the tripping elastic element 107, preventing it from shifting and disengaging from the tripping electrode partition 106.

[0063] like Figure 4 As shown, the resistive insulating partition 102 includes an insulating partition outer sleeve 1022 and an insulating partition inner sleeve 1023.

[0064] The insulating partition outer sleeve 1022 is attached to the inner wall of the central hole of the varistor, and the insulating partition inner sleeve 1023 is located inside the insulating partition outer sleeve 1022 and has a gap with the insulating partition outer sleeve 1022 to form an annular groove 1021.

[0065] The ends of the insulating partition outer sleeve 1022 and the insulating partition inner sleeve 1023 near the first connecting electrode 104 are connected by the insulating partition bottom plate 1025. The insulating partition bottom plate 1025 is supported on the first connecting electrode 104. One end of the tripping elastic member 107 abuts against the insulating partition bottom plate 1025. The insulating partition inner sleeve 1023 is provided with a sliding groove that slides in cooperation with the tripping partition positioning part 1062.

[0066] External pressure is applied to press down the trip electrode separator 106, causing the trip electrode 105 to adhere to the first connecting electrode 104 until it is in contact with the first connecting electrode 104. Solder is then added, and through a welding process, the trip electrode 105 and the first connecting electrode 104 are welded together. Figure 1The "normal state" is shown. When the trip electrode partition 106 slides up and down, the trip partition positioning part 1062 slides with the slide groove, which has a limiting function for the sliding direction of the trip electrode partition 106, so that the trip electrode partition 106 moves in the set direction, improving the stability of the trip electrode partition 106 when sliding.

[0067] like Figure 4 and Figure 5 As shown, in this embodiment, the resistive insulating partition 102 further includes a resistive insulating cover plate 1024 connected to the end of the insulating partition outer sleeve 1022 that is away from the first connecting electrode 104, and the resistive insulating cover plate 1024 is attached to the second connecting electrode 103.

[0068] In a specific embodiment of the present invention, multiple tripping baffle positioning parts 1062 can be provided, and they are arranged symmetrically along the central axis of the tripping baffle cylinder 1061. For example... Figure 5 In the illustrated scheme, there are two tripping partition positioning parts 1062. Of course, the number of tripping partition positioning parts 1062 can also be other, such as three or four. This embodiment does not limit the number of tripping partition positioning parts 1062.

[0069] It should be noted that the outer contour of the varistor 101 can be cylindrical, with a circular hole at its center; alternatively, the outer contour of the varistor 101 can be prismatic, with a circular hole at its center; or alternatively, the outer contour of the varistor 101 can be prismatic, with a square hole at its center. This embodiment does not limit the shape of the inner and outer contours of the varistor 101.

[0070] The melting temperature of the solder between the tripping electrode 105 and the first connecting electrode 104 is the first temperature; the melting temperature of the solder between the varistor 101 and the first connecting electrode 104 and the second connecting electrode 103 is the second temperature. In this embodiment, the first temperature can be designed to be no greater than the second temperature, and the difference between the first temperature and the second temperature is less than a preset value, so that the first temperature and the second temperature are kept as close as possible or equal.

[0071] In this embodiment, the melting temperature of the solder used between the tripping electrode 105 and the first connecting electrode 104 can be close to or the same as the melting temperature of the solder used between the first connecting electrode 104, the second connecting electrode 103 and the varistor 101, so as to achieve a sufficiently high soldering connection strength and reliability, and to ensure effective thermal tripping.

[0072] This invention also discloses a surge protector, which includes a varistor and thermal protection device connection structure as described above. Therefore, it has all the technical effects of the above-mentioned varistor and thermal protection device connection structure, which will not be repeated here.

[0073] It should be noted that the various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0074] As indicated in this application and claims, unless the context clearly indicates otherwise, the words "a," "an," "a," and / or "the" are not specifically singular and may include the plural. Generally, the terms "comprising" and "including" only indicate the inclusion of expressly identified steps and elements, which do not constitute an exclusive list, and the method or apparatus may also include other steps or elements. An element defined by the phrase "comprising an..." does not exclude the presence of other identical elements in the process, method, product, or apparatus that includes the element.

[0075] Hereinafter, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.

[0076] This article uses specific examples to illustrate the principles and implementation methods of the present invention. The descriptions of the above embodiments are only for the purpose of helping to understand the core ideas of the present invention. It should be noted that those skilled in the art can make several improvements and modifications to the present invention without departing from the principles of the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

Claims

1. A connection structure for a varistor and a thermal protection device, characterized in that, The application relates to a thermal protection device for a varistor (101) with a varistor center hole in the center of the varistor (101), a first connecting electrode (104) at one end of the varistor (101) and a second connecting electrode (103) at the other end of the varistor (101). The thermal protection device comprises a tripping electrode (105) and a tripping elastic element (107) arranged in the insulating partition center hole, the tripping electrode (105) is connected with the first connecting electrode (104) through soldering to form a thermal disengagement point, one end of the tripping elastic element (107) is connected with the resistance insulating partition (102), and the other end of the tripping elastic element (107) is connected with the tripping electrode (105) to push the tripping electrode (105) to move away from the first connecting electrode (104). The thermal protection device further comprises a tripping electrode partition (106), and the tripping elastic element (107) is connected with the tripping electrode (105) through the tripping electrode partition (106). The tripping electrode partition (106) is fixedly connected with the tripping electrode (105).

2. The piezoresistor and thermal protection device connection structure according to claim 1, characterized by The tripping electrode (105) comprises a tripping electrode bottom plate (1052) and a tripping electrode terminal post (1051) connected with the tripping electrode bottom plate (1052), the tripping electrode bottom plate (1052) is connected with the first connecting electrode (104) through soldering to form a thermal disengagement point. The tripping electrode partition (106) comprises a tripping partition cylinder (1061) and a tripping partition positioning part (1062), the tripping partition cylinder (1061) is sleeved outside the tripping electrode terminal post (1051), a first end of the tripping electrode partition (106) is fixed on the tripping electrode bottom plate (1052), and the tripping partition positioning part (1062) is arranged on the tripping electrode partition (106) and used for abutting against the tripping elastic element (107).

3. The piezoresistor and thermal protection device connection structure according to claim 2, characterized by The resistance insulating partition (102) has an annular groove (1021), the tripping elastic element (107) is arranged in the annular groove (1021), the tripping partition positioning part (1062) extends into the annular groove (1021) and abuts against the tripping elastic element (107). The resistance insulating partition (102) comprises:

4. The piezoresistor and thermal protection device connection structure according to claim 3, characterized by an insulating partition outer sleeve (1022) adhered to the inner wall of the varistor center hole.

5. The piezoresistor and thermal protection device connection structure according to claim 4, characterized by ​ ​ An insulating partition inner sleeve (1023) is located inside the insulating partition outer sleeve (1022) and forms the annular groove (1021) with the insulating partition outer sleeve (1022), one end of the insulating partition outer sleeve (1022) and the insulating partition inner sleeve (1023) close to the first connecting electrode (104) is connected by an insulating partition bottom plate (1025), the insulating partition bottom plate (1025) is supported on the first connecting electrode (104), one end of the tripping elastic member (107) abuts on the insulating partition bottom plate (1025), and a sliding groove is formed on the insulating partition inner sleeve (1023) and slidably connected with the tripping partition positioning portion (1062).

6. The piezoresistor and thermal protection device connection structure according to claim 5, wherein The resistance insulating partition (102) further comprises a resistance insulating cover plate (1024) connected to one end of the insulating partition outer sleeve (1022) away from the first connecting electrode (104), and the resistance insulating cover plate (1024) is attached to the second connecting electrode (103).

7. The piezoresistor and thermal protection device connection structure according to claim 5, wherein The tripping partition positioning portion (1062) is multiple and is arranged in a central symmetry along the axis of the tripping partition cylinder (1061).

8. The piezoresistive and thermal protection device connection structure according to any one of claims 1 to 7, characterized in that The outer contour of the piezoresistor (101) is cylindrical, and the piezoresistor center hole is a circular hole; or The outer contour of the piezoresistor (101) is a prism structure, and the piezoresistor center hole is a circular hole; or The outer contour of the piezoresistor (101) is a prism structure, and the piezoresistor center hole is a square hole.

9. The piezoresistive and thermal protection device connection structure according to any one of claims 1 to 7, wherein The melting temperature of the solder between the tripping electrode (105) and the first connecting electrode (104) is a first temperature; The melting temperature of the solder between the piezoresistor (101) and the first connecting electrode (104) and the second connecting electrode (103) is a second temperature; The first temperature is not greater than the second temperature, and the difference between the first temperature and the second temperature is less than a preset value.

10. A surge protector, characterized by, A piezoresistor and thermal protection device connection structure comprising any one of claims 1-9.

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