CN114006361B

CN114006361B - Surge protector

Info

Publication number: CN114006361B
Application number: CN202111657806.4A
Authority: CN
Inventors: 陆永欢; 陈雷; 任华山; 全愉; 高煊慧
Original assignee: Phoenix Contact Asia Pacific Nanjing Co Ltd
Current assignee: Phoenix Contact Asia Pacific Nanjing Co Ltd
Priority date: 2021-12-31
Filing date: 2021-12-31
Publication date: 2022-04-22
Anticipated expiration: 2041-12-31
Also published as: CN114006361A; DE102023200005A1

Abstract

The invention relates to a surge protector, comprising: a housing; a first stacked layer composed of a plurality of first insulating frames and a plurality of electrode sheets, the plurality of first insulating frames accommodating the electrode sheets, respectively, and being stacked on each other, the first stacked layer being disposed within a first portion of the case; a second stacked layer composed of a plurality of second insulating frames, a plurality of electrode tabs, and an electrode frame, the plurality of second insulating frames and the electrode frame respectively accommodating the electrode tabs and being stacked on each other, the second stacked layer being disposed in a second portion of the case that is separate from the first portion; and a conductive bridge structure electrically coupling an electrode pad in the first stack layer with the electrode frame.

Description

Surge protector

Technical Field

The present invention relates to the field of electrical equipment, and more particularly, to a surge protector.

Background

With the rapid development of the communication industry, the rapid development of the terminal and the mobile internet service is raising higher challenges to the evolution of the mobile network in the coming 5G era, and in order to achieve the high speed and intelligentization of communication, more intensive mobile base stations are needed, and these numerous mobile base stations are objectively restricted by the installation position, so that the equipment is required to have the characteristics of being ultra-thin, ultra-small, easy to install, easy to produce and high in performance, and therefore, more and more matched part products suitable for the miniaturized base stations with deep coverage, easy to deploy and low energy consumption are continuously emerging, and a miniaturized onboard surge protector (also called a lightning protector, hereinafter abbreviated as SPD) is one of the miniaturized onboard surge protectors.

The early mobile base station mostly adopts guide rail installation plug-in SPDs, and the SPDs are based on piezoresistors, gaps and gas discharge tube principles, have the characteristics of large through-flow capacity, function state indication, convenient replacement and the like, but have larger size due to the limitation of structures and components; with the further development of the communication industry, the plug-in SPD installed on the guide rail is gradually replaced by a PCB installed SPD with a smaller volume, and the PCB welding installation product still adopts the design of a piezoresistor and a gas discharge tube, but the requirement of miniaturization can be realized to a certain extent by removing the guide rail and the plug-in base.

The current PCB-mounted SPD solution includes a varistor that is used to form a series circuit with the gas discharge tube. Specifically, the gas discharge tube is mostly single discharge gap generally, and to alternating current system, generally can adopt the alternating current zero crossing to carry out the arc extinguishing, and to direct current system, because the arc voltage drop after the switch-on of single gap is very low (generally only tens volts), can't cut off the direct current afterflow, causes the gas discharge tube to last low resistance and switches on, leads to overheated and damages. The series circuit of the piezoresistor and the gas discharge tube is adopted, and the follow current can be cut off under certain conditions.

With the application of high voltage direct current in the communications industry, miniaturization is challenged when a PCB-mounted SPD solution is used to achieve higher current flow and higher operating voltage. Specifically, because PCB-mounted SPDs are based on varistor and gas discharge tube designs, the area of the varistor is proportional to the current and the thickness is proportional to the voltage, and when the voltage is higher and the current is larger, a thicker, larger varistor must be used to meet the parameter requirements.

Therefore, there is a need to design a lightning protection device with high current and high operating voltage, while having a small volume and having dc free-wheeling cutoff capability.

Disclosure of Invention

The surge protector comprises a plurality of first insulation frames, a plurality of second insulation frames, a plurality of conductive bridging structures and a plurality of first stacking layers, wherein the plurality of first insulation frames are a, the plurality of second insulation frames are B, the first stacking layers comprise a plurality of insulation frames and a +1 electrode plates sequentially separated by the a insulation frames, the second stacking layers comprise B insulation frames and B +2 electrode plates sequentially separated by the B insulation frames and the electrode frames, and the conductive bridging structures electrically couple the electrode plate closest to the inside of the housing in the first stacking layers with the electrode frames.

In the surge protector, the electrode frame is arranged between the two insulating frames.

The surge protector as described above, further comprising a plurality of electrodes for extraction, the plurality of electrodes comprising: a first electrode electrically coupled with an electrode pad of the first stack layer that is furthest from the housing interior; a second electrode electrically coupled with an electrode pad of the second stacked layer that is furthest from the interior of the housing; and a third electrode electrically coupled with an electrode pad of the second stacked layer that is closest to the interior of the housing.

In the surge protector, the first electrode includes one of an L electrode and an N electrode, and the second electrode includes the other of the L electrode and the N electrode, or the first electrode includes one of a positive electrode and a negative electrode, the second electrode includes the other of the positive electrode and the negative electrode, and the third electrode includes a ground electrode.

In the surge protector described above, the number of insulating frames of the second stacked layer is larger than the number of insulating frames of the first stacked layer.

In the surge protector described above, the electrode frame is provided at an intermediate position of the second stacked layer.

The surge protector as described above, the housing includes a shell and a bottom case; the bottom case includes: a base, a first sidewall and a second sidewall extending from the base, and an insulating spacer positioned between and substantially perpendicular to the first and second sidewalls, the insulating spacer, the first sidewall and the second sidewall configured to form a first cavity and a second cavity within the bottom shell; the first stacking layer is disposed within a first cavity of the bottom case, and the second stacking layer is disposed within a second cavity of the bottom case.

A surge protector as described above, the electrically conductive bridging structure comprising first and second sheet structures angled with respect to each other; a first mounting hole is formed in the first side wall of the bottom shell; the first sheet structure of the conductive bridge structure extends from outside the first side wall into the first cavity through the first mounting hole, and one side of the first sheet structure of the conductive bridge structure abuts against the insulating separator plate and the other side is electrically coupled with the electrode sheet of the first stacked layer closest to the insulating separator plate.

The surge protector as described above, wherein the electrode sheet of the first stacked layer closest to the insulating separator is stacked with a first metal sheet; the other side of the first sheet structure of the conductive bridging structure is in electrical contact with the first metal sheet so as to be electrically coupled with an electrode sheet of the first stacked layer closest to the insulating separator.

The surge protector as described above, wherein the second sheet structure of the conductive bridging structure extends along the outside of the first sidewall; the second sheet structure of the conductive bridging structure comprises a first hole; the electrode frame includes an extension structure extending from the second cavity outside the first sidewall; wherein the extension structure of the electrode frame is inserted into and welded to the first hole on the second sheet structure of the conductive bridging structure, thereby achieving electrical connection of the conductive bridging structure and the electrode frame.

The surge protector of the above, wherein the second sheet structure of the conductive bridging structure further comprises a second aperture; the first side wall of the bottom shell comprises a protruding structure matched with the second hole in shape on the outer side, so that the protruding structure can be inserted into the second hole, and the conductive bridging structure is fixed.

In the surge protector, the second side wall of the bottom shell is provided with a second mounting hole; the third electrode extends into the second cavity from outside the second sidewall through the second mounting hole, and one side of the third electrode abuts against the insulating separator and the other side is electrically coupled with an electrode pad of the second stacked layer closest to the insulating separator.

In the surge protector described above, a second metal piece is stacked on the electrode piece of the second stacked layer closest to the insulating separator, and the other side of the third electrode is in electrical contact with the second metal piece so as to be electrically coupled with the electrode piece of the second stacked layer closest to the insulating separator.

As described above, the surge protector, the third electrode includes the conductive terminal extending from the base of the bottom case.

The surge protector as described above, further comprising a pair of fixing plates, wherein a first fixing plate is fixed to first ends of first and second sidewalls of the bottom case by a fastener, and a second fixing plate is fixed to second ends of the first and second sidewalls of the bottom case by a fastener.

In the surge protector described above, the second electrode is in electrical contact with the electrode tab of the second stacked layer that is farthest from the insulating separator, and the second electrode is fixed between the electrode tab and the second fixing plate by the fastener.

In the surge protector described above, at least a part of the first electrode is welded to the first fixing plate.

The surge protector as described above, the first electrode comprising: the fixing plate comprises a main body part, a welding part, a bent part for connecting the main body part and the welding part, and a pin extending from the main body part, wherein the bent part enables the main body part and the welding part to be staggered in parallel, and the welding part is welded on the first fixing plate.

In the surge protector, the welding portion of the first electrode is welded to the first fixing plate by low-temperature solder, so that the low-temperature solder is melted when the surge protector is overheated due to overload.

The surge protector as described above, further comprising: a spring; and the arc isolation plate is arranged between the first electrode and the first fixing plate, a structure for fixing one end of the spring is arranged on the arc isolation plate, the other end of the spring is fixed on the first fixing plate, when the spring is fixed on the first fixing plate and the arc isolation plate, the spring is in a stretching state, when the low-temperature soldering tin is melted, the welding part of the first electrode is separated from the first fixing plate, and at the moment, the spring pulls the arc isolation plate to move and pass through the welding part of the first electrode and the welding point of the first fixing plate, so that the first electrode is disconnected from a circuit.

The surge protector comprises a main body structure and an extension structure extending at an angle with the main body structure, wherein at least the extension structure of the flash barrier has color; the shell is provided with a hole, and the position of the hole is configured to enable the extension structure with the color of the flash barrier to be seen through the hole when the spring pulls the flash barrier to move and stop at the final position.

The surge protector further comprises a PCB, a capacitor is welded on the first side of the PCB, and a trigger elastic sheet is welded on the second side of the PCB.

As described above, each of the pair of fixing plates includes the solder leg, and the PCB board is soldered and fixed to the fixing plate by the solder leg.

In the surge protector described above, the electrode sheet includes a graphite sheet.

Drawings

To further clarify embodiments of the present invention, a more particular description of embodiments of the present invention will be rendered by reference to the appended drawings. It is appreciated that these drawings depict only typical embodiments of the invention and are therefore not to be considered limiting of its scope as claimed.

Fig. 1 is a schematic structural view of an assembled surge protector according to an embodiment of the present invention;

figure 2 shows an exploded view of the surge protector shown in figure 1;

fig. 3 shows a first schematic view of a bottom shell portion of a housing of a surge protector according to an embodiment of the invention;

fig. 4A shows a second schematic view of a bottom shell portion of a housing of a surge protector according to an embodiment of the invention;

fig. 4B shows a third schematic view of a bottom shell portion of a housing of a surge protector according to an embodiment of the invention;

fig. 4C shows a fourth schematic view of a bottom shell portion of a housing of a surge protector according to an embodiment of the invention;

fig. 5 shows a top cross-sectional view of an assembled surge protector according to an embodiment of the invention;

FIG. 6 shows a schematic view of a surge protector with the housing assembled and removed in accordance with an embodiment of the invention;

fig. 7 shows a schematic diagram of a conductive bridging structure of a surge protector according to an embodiment of the invention;

fig. 8 shows a schematic view of a fixing plate of a surge protector according to an embodiment of the present invention;

fig. 9 shows a schematic diagram of one of the electrodes of a surge protector according to an embodiment of the invention; and is

Fig. 10 shows a schematic view of an arc barrier of a surge protector according to an embodiment of the invention.

Detailed Description

The following detailed description refers to the accompanying drawings. The drawings show, by way of illustration, specific embodiments in which the claimed subject matter may be practiced. It is to be understood that the following detailed description is intended for purposes of illustration, and is not to be construed as limiting the invention; those skilled in the art, having the benefit of this disclosure, may effect numerous modifications thereto and changes may be made without departing from the scope and spirit of the claimed subject matter.

In the following detailed description, numerous specific details are set forth in order to provide a thorough understanding of various described embodiments. It will be apparent, however, to one skilled in the art that the various embodiments described may be practiced without these specific details. Unless defined otherwise, technical and scientific terms used herein shall have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs. The term "coupled" may include an electrical connection or contact, either direct or indirect.

The terms "first," "second," and the like in the description and in the claims of the present application do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. An embodiment is an example implementation or example. Reference in the specification to "an embodiment," "one embodiment," "some embodiments," "various embodiments," or "other embodiments" means that a particular feature, structure, or characteristic described in connection with the embodiments is included in at least some embodiments, but not necessarily all embodiments, of the technology. The various appearances "an embodiment," "one embodiment," or "some embodiments" are not necessarily all referring to the same embodiments. Elements or aspects from one embodiment may be combined with elements or aspects of another embodiment.

Based on the situation described in the background section, and in consideration of the complex situation of field wiring, the invention provides a surge protector with bridging electrodes, wherein the number of gap layers is increased by the bridging electrodes between each electrode, and the external dimension of a product is effectively reduced while the electrical performance of the product is improved. Meanwhile, the surge protector is provided with an arc isolation device on the L electrode side, so that the direct current follow current cutting-off capability is improved. The invention will be further described with reference to the accompanying drawings.

Reference is first made to fig. 1 and 2. Fig. 1 is a schematic diagram of the structure of an assembled surge protector 100 according to an embodiment of the invention, and fig. 2 is an exploded view of the surge protector 100 shown in fig. 1. In general, a surge protector 100 according to the present invention may include: the electrode assembly includes a case, an electrode frame 16, a stacked structure in which a plurality of insulating frames 18, electrode sheets 17 respectively disposed in the respective insulating frames 18 and the electrode frame 16 are stacked, and a conductive bridge structure 15.

The housing may be an insulating housing comprising an industrial flame retardant grade insulating material. In a particular embodiment, the material of the housing may include one or more of a ceramic material, a polymeric insulating material. The material has the characteristics of various shapes, impact resistance and the like, and can ensure safe and insulated electrical performance with other electronic components in the using process of the product, and the material has good processability and is safe and reliable.

The surge protector 100 may include a multi-layered gap, and as shown in fig. 2 and 5, a multi-layered stack structure formed by stacking a plurality of insulating frames 18 and electrode sheets 17 respectively provided in the respective insulating frames 18. The material of the insulating frame 18 may include one or more of a polymer insulating material, rubber, PTFE, ceramic. The material of the electrode sheet 17 may be selected from materials having high temperature resistance, arc resistance, high current density resistance, and the like. The material of the electrode sheet 17 may be a metal or non-metal material. For example, the material of the electrode sheet 17 may be graphite or a metal material or a metal alloy material. In a preferred embodiment, the electrode sheet 17 may comprise a graphite sheet.

According to an embodiment of the present invention, the stacked structure may include two sets, i.e., a first stacked layer and a second stacked layer (which will be described below in conjunction with fig. 5), each set of the stack may include a plurality of insulating frames 18 and a corresponding plurality of electrode sheets 17. The number of layers in the two sets of stacks may be different. The two sets of stacks may be placed in separate different parts of the housing. By "separate" is meant that the two parts of the housing are electrically isolated from each other. Any suitable technique may be used to electrically isolate the two portions of the housing. Hereinafter, preferred embodiments according to the present invention will be described.

Fig. 5 shows a top cross-sectional view of an assembled surge protector 100 according to an embodiment of the present invention. As shown in connection with fig. 5, surge protector 100 includes two sets of stacks separated using an insulating separator plate 212 described in more detail below, namely a first stack layer on the left and a second stack layer on the right in fig. 5.

The electrode frame 16 may be disposed in a second stacked layer, for example, between two insulating frames. The electrode frame 16 may preferably comprise a low impedance conductive material. The electrode frame 16 may be a sheet-like structure. Both sides of the electrode frame 16 may be electrically coupled or directly electrically contacted with one electrode pad 17, respectively. The main body portion of the electrode frame 16 may have substantially the same size as the insulating frame 18 so as to be stacked in the second stacked layer, and the electrode sheet 17 may be incorporated into the electrode frame 18, as shown in fig. 5. Preferably, the electrode frame 16 may be disposed at an intermediate position of the second stacked layer.

The number of the insulating frames 18 of the first stacked layer may be a, and the number of the insulating frames 18 of the second stacked layer may be B. The first stack layer may include a number of insulating frames 18 and a +1 electrode pads 17 sequentially separated by the a number of insulating frames 18, wherein the electrode pad 17 closest to the insulating separator 212 may be placed in a shape similar to the insulating frame 18 formed by the separator 212, as shown in connection with fig. 4C and 5. The second stacked layer may include B insulating frames 18 and B +2 electrode pads 17 sequentially partitioned by the B insulating frames 18 and the electrode frames 16. Similarly, the electrode pads 17 of the second stacked layer closest to the insulating separator 212 may be placed in a shape similar to the insulating frame 18 formed by the separator 212.

As further shown in connection with fig. 5, the conductive bridge structure 15 may be configured to electrically couple the electrode tabs 17 of the first stacked layer that are closest to the interior of the housing (e.g., closest to the insulating separator 212) to the electrode frame 16 disposed within the second stacked layer, as described in more detail below. The conductive bridging structure 15 may preferably comprise a low impedance conductive material.

In a further embodiment, the housing may comprise a shell 1 and a bottom shell 2. In an exemplary embodiment, the housing 1 may be a pentahedral shell, some of which may be provided with holes, as described in more detail below. The housing 1 may be mounted on the bottom case 2. Fig. 3 and 4C are schematic views of a portion of the bottom case 2 of the surge protector according to the embodiment of the present invention. As shown in conjunction with fig. 3 and 4C, the bottom chassis 2 may include a base 206, first and

second sidewalls

208 and 210 extending from the base 206, and an insulating spacer 212 (fig. 4C) positioned between and substantially perpendicular to the first and

second sidewalls

208 and 210. The insulating partition plate 212, the first sidewall 208, and the second sidewall 210 may be configured to form the first cavity 201 and the second cavity 202 within the bottom chassis 2. The material of the insulating isolation plate 212 may comprise an insulating material, for example, having the same material as the housing material described above, or may comprise another insulating material.

The first and second stacked layers described above may be placed within the first and

second cavities

201 and 202, respectively. The number of layers (the number of the insulating frames and the number of the electrode sheets) of each of the first stacked layer and the second stacked layer may be designed according to actual requirements. In a preferred embodiment of the present invention, the number of layers of the second stack of layers disposed within the second cavity 202 may be greater than the number of layers of the first stack of layers disposed within the first cavity 20. As one non-limiting example, as shown in fig. 5, the first stacked layer may include 5-layer gaps (5 insulating frames 17, 6 electrode sheets 18), and the second stacked layer may include 9-layer gaps. The electrode frame 16 described above may preferably be configured to divide the second stacked layer within the second cavity 202 into a left 5-layer gap (5 insulating frames 17, 6 electrode tabs 18) and a right 4-layer gap (4 insulating

frames

17, 5 electrode tabs 18). Both sides of the electrode frame 16 may be in direct electrical contact with the electrode pads 18 on both sides. Accordingly, the volume of the second cavity 202 for accommodating the second stacked layer may be greater than the volume of the first cavity 201 for accommodating the first stacked layer.

As shown in fig. 1, the surge protector 100 according to the present invention may preferably include three electrodes for extraction: a first electrode 11, a second electrode 12, and a third electrode 13. The first electrode 11 may comprise the L-electrode in an alternating current circuit and the second electrode 12 may comprise the N-electrode in an alternating current circuit. Alternatively, the first electrode 11 may comprise a positive electrode in a direct current circuit, and the second electrode 12 may comprise a negative electrode in a direct current circuit. The third electrode 13 may include a ground electrode (hereinafter, referred to as a PE electrode). Alternatively, the first electrode 11 may comprise the N electrode in an alternating current circuit and the second electrode 12 may comprise the L electrode in an alternating current circuit. Alternatively, the first electrode 11 may comprise a negative electrode in a direct current circuit, and the second electrode 12 may comprise a positive electrode in a direct current circuit. For convenience of explanation, the present application will be described with the former case as an example. As shown in connection with fig. 5, the first electrode 11 may be configured to electrically couple with an electrode pad of the first stack layer that is closest to the outside of the housing (e.g., farthest from the insulating separator 212). The third electrode 13 may be configured to be electrically coupled with an electrode pad of the second stacked layer that is closest to the interior of the case (e.g., closest to the insulating separator 212). The second electrode 12 may be configured to electrically couple with an electrode pad of the second stacked layer that is closest to the exterior of the housing (e.g., furthest from the insulating separator 212).

As shown in fig. 1, the surge protector 100 may further include a pair of fixing plates 7. Fig. 8 shows a schematic view of the fixing plate 7 of the surge protector 100 according to an embodiment of the present invention, as shown, the fixing plate 7 may preferably include a welding foot 71. The fixing plate 7 may preferably comprise a high-strength conductive material. Referring to fig. 1, one fixing plate 7 (first fixing plate) is fixed to one end (e.g., the end in the a direction shown in fig. 1) of the first and second side walls of the bottom case 2 by a fastener 9, and the other fixing plate 7 (second fixing plate) is fixed to the other end (e.g., the end in the B direction shown in fig. 1) of the first and second side walls of the bottom case 2 by a fastener 9. The fastener 9 may be any type of fastener available in the art, and the present invention is not limited thereto. In a preferred embodiment, the fasteners 9 may be screws or rivets. In an alternative embodiment, instead of using the fasteners 9 to secure the fixing plate 7 to the bottom case 2, the fixing plate 7 may be secured to the bottom case 2 by welding, gluing, bonding, or the like.

As shown in fig. 2, the surge protector 100 may further include a printed circuit board (hereinafter, referred to as a PCB board) 5 as a trigger circuit board. A plurality of capacitors 4 are welded on the first side of the PCB 5, and a plurality of trigger springs (not shown in fig. 2) are welded on the second side of the PCB 5. The PCB board 5 can be electrically connected to the two sets of stacks by the trigger spring. The capacitor 4 and the trigger spring plate can be arranged, one end of the trigger spring plate is fixed on the PCB, and the other end of the trigger spring plate is in contact with the electrode plate 17, so that the surge protector can protect connected electrical equipment, and the surge protector can be realized by a person skilled in the art. The trigger spring piece can comprise any one of an elastic metal sheet, a metal pin header, a metal spring pin and the like. Both ends of the PCB board 5 in the a and B directions may be soldered to soldering pins 71 of the fixing plate 7 (as shown in fig. 8), thereby being fixed to the bottom chassis 2 and electrically connected to the two sets of stacks. In addition, a pressing plate 6 may be installed between the PCB board 5 and the insulating frame 18 to make the installation structure more stable.

Fig. 7 shows a schematic diagram of a conductive bridging structure 15 of a surge protector according to an embodiment of the invention. As shown in fig. 7, the conductive bridging structure 15 according to the present invention may preferably include a first sheet structure 152 and a second sheet structure 154 that are angled with respect to each other. Further preferably, the angle formed by the first sheet structure 152 and the second sheet structure 154 is about 90 degrees. As shown in fig. 3, the first sidewall 208 of the bottom chassis 2 is provided with a first mounting hole 204. The first sheet structure 152 of the conductive bridge structure 15 extends from outside the first sidewall 208 into the first cavity 201 through the first mounting hole 204, and, as shown in connection with fig. 5, one side of the first sheet structure 152 of the conductive bridge structure 15 abuts against the insulating spacer 212 and the other side is electrically coupled with the electrode sheet of the first stack layer closest to the insulating spacer 212. In a preferred embodiment of the present invention, the first metal sheet 14A may be stacked on the electrode sheet of the first stacked layer closest to the insulating isolation plate 212. The first sheet structure 152 of the conductive bridge structure 15 is in electrical contact with the metal sheet 14A, so that the first sheet structure 152 of the conductive bridge structure 15 can be electrically coupled with the electrode sheet of the first stacked layer closest to the insulating separator 212 via the metal sheet 14A.

The second sheet structure 154 of the conductive bridging structure 15 may extend along the outside of the first sidewall 208. The second sheet structure 154 of the conductive bridge structure 15 may include a first hole 1542. The electrode frame 16 may include an extension structure 1602 (shown in fig. 2) extending from a body portion of the electrode frame 16, and the extension structure 1602 may extend from the second cavity 202 to outside the first sidewall 208. The extension structure 1602 of the electrode frame 16 may be inserted into and welded to the first hole 1542 of the second sheet structure of the conductive bridge structure 15, thereby achieving electrical connection of the conductive bridge structure 15 and the electrode frame 16.

The second sheet structure 154 of the conductive bridge structure 15 may also include a second aperture 1544. Protruding structure 2082 with a shape matching second hole 1544 may be included on first sidewall 208 of bottom case 2, such that protruding structure 2082 can be inserted into second hole 1544, thereby serving to fix conductive bridging structure 15.

Fig. 4A to 4C respectively show additional schematic views of a bottom case portion of a housing of a surge protector according to an embodiment of the present invention. As shown in fig. 4A, the second sidewall 210 of the bottom chassis 2 may be provided with a second mounting hole 203. In a preferred embodiment, the third electrode 13 may be a structure in which a plurality of electrode sheets are combined or integrally formed, as shown in fig. 2. The third electrode 13 may extend from outside the second sidewall 210 into the second cavity through the second mounting hole 203, and one side of the third electrode 13 may abut against the insulating separator 212 (as shown in conjunction with fig. 4C) and the other side may be electrically coupled with the electrode pad 17 of the second stacked layer closest to the insulating separator 212.

In a preferred embodiment, the electrode tab 17 of the second stacked layer closest to the insulating separator 212 may have a second metal piece 14B stacked thereon, as shown in conjunction with fig. 5. The above-mentioned other side of the third electrode 13 may be in electrical contact with the second metal sheet 14B, so that the third electrode 13 may be electrically coupled with the electrode pad of the second stacked layer closest to the insulating separator 212 through the second metal sheet 14B.

Third electrode 13 the combination of the plurality of sheet structures described above enables third electrode 13 to extend further along second sidewall 210 of bottom case 2, and base 206, and may include conductive terminal 1302 extending from base 206 of bottom case 2, as shown in fig. 4B, for further electrical connection.

As shown in connection with fig. 2 and 5, the second electrode 12 may be in electrical contact with an electrode tab of the second stacked layer that is furthest from the interior of the housing (e.g., furthest from the insulating separator 212), and the second electrode 12 may be secured between the electrode tab and the securing plate 7 by a fastener 9 or other securing means described above.

As described above, the first electrode 11 may be configured to be electrically coupled with the electrode sheet 17 of the first stacked layer that is farthest from the inside of the housing (for example, farthest from the insulating separator 212). The first electrode may be configured to disconnect from the circuit when the surge protector is overloaded causing overheating, thereby protecting the electrical equipment.

Fig. 9 shows a schematic view of the first electrode 11 of the surge protector according to an embodiment of the invention. At least a portion of the first electrode 11 may be welded to the fixed plate 7. As shown in fig. 9, in a preferred embodiment of the present invention, the first electrode 11 may include: a body portion 1102, a weld portion 1104, a bend portion 1106 connecting the body portion 1102 and the weld portion 1104, and pins 1108 extending from the body portion 1102. The bent portion 1106 is angled (preferably, obtuse) with respect to the body portion 1102 and the weld portion 1104, respectively, i.e., the body portion 1102 and the weld portion 1104 may be offset in parallel.

The welding portion 1104 may be welded to the first fixing plate 7. In a preferred embodiment, the welding portion 1104 of the first electrode 11 may be welded to the fixing plate 7 by low temperature solder so that the low temperature solder can be melted when the surge protector is overloaded and overheated.

The surge protector may further include: spring 8 and flash barrier 3. The arc barrier 3 may preferably comprise a high temperature resistant insulating material including, but not limited to, engineering plastics, ceramic materials, mica, and the like. The arc-isolating plate 3 is mounted between the first electrode 11 and the first fixing plate 7 (as shown in fig. 6). Figure 10 shows a schematic view of the flash barrier 3 according to an embodiment of the invention in more detail. The arc chute 3 may comprise a body structure 302. The arc-isolating plate 3 may be provided with a structure 304 for fixing one end of the spring thereon, and the other end of the spring 8 is fixed on the fixing plate 7. The arc barrier 3 may be provided with a pair of flange structures 306 on which the main portion 1102 of the first electrode 11 is placed. When the two ends of the spring 8 are respectively fixed on the fixed plate 7 and the flash barrier 3, the spring 8 is in a stretching state. When the low-temperature solder is melted, the welding portion 1104 of the first electrode 11 is separated from the fixing plate 7, at this time, the spring 8 pulls the arc barrier 3 to move in the direction C shown in fig. 6, and the arc barrier 3 moves through the welding point of the welding portion 1104 of the first electrode 11 and the fixing plate 7, disconnecting the first electrode 11 from the circuit, thereby protecting the electrical equipment.

In an embodiment of the present invention, the flash barrier 3 may further include an extension structure 308 extending at an angle (e.g., about 90 degrees) to the main structure 302. At least the extension 308 of the flash barrier 3 may be coloured, for example coated with a colour. The extended structure 308 of the flash barrier 3 may be provided in a different color from that of the PCB panel 5. Preferably, the extension structure 308 of the arc barrier 3 may be red in color. The housing 1 may be provided with an aperture 102. The position of the holes 102 is such that: when the spring 8 pulls the flash barrier 3 to move and stop at the final position, the user can see the extended structure 308 of the moving flash barrier 3 with color, such as the red color mentioned above, from the hole 102, and further warn the user of the current state of the surge protector, that is, the surge protector circuit is overloaded and the circuit is overheated, and the first electrode 11 is disconnected from the surge protector circuit.

As can be appreciated by those skilled in the art, the larger the number of layers of the gap of the surge protector, the higher the voltage it can withstand and the larger the through-current. In the present invention, the use of the conductive bridging structure 15 can reduce the number of layers in the gap, thereby achieving improved electrical performance in a smaller instrument volume. For example, as one non-limiting example, as shown above in connection with fig. 5, the first stacked layer includes 5-layer gaps and the second stacked layer includes 9-layer gaps, and the electrode frame 16 separates the second stacked layer into a left five-layer gap and a right four-layer gap. By electrically connecting the two stacked layers with the conductive bridging structure 15, a 9-layer gap from the L electrode to the PE electrode, and a 9-layer gap from the N electrode to the PE electrode, for example, can be achieved. In the present invention, this situation only requires that the surge protector include 14 layers of gaps. Whereas in the prior art, an 18-layer gap may be required if desired to achieve the same effect.

Accordingly, the present invention proposes a surge protector having the gap stack structure described according to the embodiment of the present invention, thereby achieving stacking of more gap structures, particularly lower in height, in a smaller surge protector space size. Therefore, the surge protector has high through current and high working voltage and simultaneously has a lightning protector with smaller volume. In addition, the surge protector is provided with a tripping device, so that rapid thermal tripping and breaking are realized; the surge protector also has a window state display function, so that a user can directly and quickly know the state of the surge protector from the window. In addition, the surge protector of this application has adopted pin welding form. Therefore, the surge protector can meet the requirements of high integration, miniaturization and batch wave soldering production of the conventional industrial power supply.

The basic concept of the present invention has been described above. It will be apparent to those skilled in the art that the foregoing disclosure is by way of example only, and is not intended to limit the present application. Various modifications, improvements and adaptations to the present application may occur to those skilled in the art, although not explicitly described herein. Such modifications, improvements and adaptations are proposed in the present application and thus fall within the spirit and scope of the embodiments of the present application.

Claims

1. A surge protector, comprising:

a housing;

a first stacked layer composed of a plurality of first insulating frames and a plurality of electrode sheets, the plurality of first insulating frames accommodating the electrode sheets, respectively, and being stacked on each other, the first stacked layer being disposed within a first portion of the case;

a second stacked layer composed of a plurality of second insulating frames, a plurality of electrode tabs, and an electrode frame, the plurality of second insulating frames and the electrode frame respectively accommodating the electrode tabs and being stacked on each other, the second stacked layer being disposed in a second portion of the case that is separate from the first portion; and

a conductive bridge structure electrically coupling an electrode pad in the first stack layer with the electrode frame.

2. The surge protector of claim 1, wherein the plurality of first insulating frames is a in number, the plurality of second insulating frames is B in number, the first stacked layer comprises a insulating frames and a +1 electrode pads sequentially separated by the a insulating frames, the second stacked layer comprises B insulating frames and B +2 electrode pads sequentially separated by the B insulating frames and the electrode frames, and the conductive bridge structure electrically couples the electrode pad in the first stacked layer that is closest to the inside of the housing with the electrode frame.

3. The surge protector of claim 1, wherein the electrode frame is disposed between two insulating frames.

4. The surge protector of claim 1, further comprising a plurality of electrodes for extraction, the plurality of electrodes comprising:

a first electrode electrically coupled with an electrode pad of the first stack layer that is furthest from the housing interior;

a second electrode electrically coupled with an electrode pad of the second stacked layer that is furthest from the interior of the housing; and

a third electrode electrically coupled with an electrode pad of the second stacked layer that is closest to the housing interior.

5. The surge protector of claim 4,

the first electrode includes one of an L electrode and an N electrode, the second electrode includes the other of the L electrode and the N electrode,

or,

the first electrode includes one of a positive electrode and a negative electrode, the second electrode includes the other of the positive electrode and the negative electrode,

the third electrode comprises a ground electrode.

6. The surge protector of claim 1,

the number of insulating frames of the second stacked layer is greater than the number of insulating frames of the first stacked layer.

7. The surge protector of claim 6, wherein the electrode frame is disposed at an intermediate position of the second stacked layer.

8. The surge protector as claimed in claim 4 or 5,

the shell comprises an outer shell and a bottom shell;

the bottom case includes: a base, a first sidewall and a second sidewall extending from the base, and an insulating spacer positioned between and substantially perpendicular to the first and second sidewalls, the insulating spacer, the first sidewall and the second sidewall configured to form a first cavity and a second cavity within the bottom shell;

the first stacking layer is disposed within a first cavity of the bottom case, and the second stacking layer is disposed within a second cavity of the bottom case.

9. The surge protector of claim 8,

the conductive bridging structure comprises a first sheet structure and a second sheet structure which form an angle with each other;

a first mounting hole is formed in the first side wall of the bottom shell;

the first sheet structure of the conductive bridge structure extends from outside the first side wall into the first cavity through the first mounting hole, and one side of the first sheet structure of the conductive bridge structure abuts against the insulating separator plate and the other side is electrically coupled with the electrode sheet of the first stacked layer closest to the insulating separator plate.

10. The surge protector of claim 9,

a first metal sheet is stacked on the electrode sheet of the first stacking layer closest to the insulating isolation plate;

the other side of the first sheet structure of the conductive bridging structure is in electrical contact with the first metal sheet so as to be electrically coupled with an electrode sheet of the first stacked layer closest to the insulating separator.

11. The surge protector of claim 9,

the second sheet structure of the conductive bridging structure extends along the outside of the first side wall;

the second sheet structure of the conductive bridging structure comprises a first hole;

the electrode frame includes an extension structure extending from the second cavity outside the first sidewall;

wherein the extension structure of the electrode frame is inserted into and welded to the first hole on the second sheet structure of the conductive bridging structure, thereby achieving electrical connection of the conductive bridging structure and the electrode frame.

12. The surge protector of claim 11,

the second sheet structure of the conductive bridging structure further comprises a second hole;

the first side wall of the bottom shell comprises a protruding structure matched with the second hole in shape on the outer side, so that the protruding structure can be inserted into the second hole, and the conductive bridging structure is fixed.

13. The surge protector of claim 8,

a second mounting hole is formed in the second side wall of the bottom shell;

the third electrode extends into the second cavity from outside the second sidewall through the second mounting hole, and one side of the third electrode abuts against the insulating separator and the other side is electrically coupled with an electrode pad of the second stacked layer closest to the insulating separator.

14. The surge protector of claim 13,

a second metal sheet is stacked on an electrode sheet of the second stacked layer that is closest to the insulating separator, and the other side of the third electrode is in electrical contact with the second metal sheet to be electrically coupled with the electrode sheet of the second stacked layer that is closest to the insulating separator.

15. The surge protector of claim 13,

the third electrode includes a conductive terminal extending from the base of the bottom case.

16. The surge protector of claim 8,

the surge protector further includes a pair of fixing plates, wherein a first fixing plate is fixed at first ends of first and second sidewalls of the bottom case by a fastener, and a second fixing plate is fixed at second ends of the first and second sidewalls of the bottom case by a fastener.

17. The surge protector of claim 16, wherein the second electrode is in electrical contact with an electrode tab of the second stacked layer that is furthest from the insulating separator plate, and wherein the second electrode is secured between the electrode tab and the second retainer plate by the fastener.

18. The surge protector of claim 16, wherein at least a portion of the first electrode is welded to the first fixation plate.

19. The surge protector of claim 18,

the first electrode includes: a body portion, a soldering portion, a bent portion connecting the body portion and the soldering portion, and a pin extending from the body portion,

wherein the bent portion causes the main body portion and the welding portion to be offset in parallel, and

the welding portion is welded to the first fixing plate.

20. The surge protector of claim 19,

the welding part of the first electrode is welded on the first fixing plate through low-temperature soldering tin, so that the low-temperature soldering tin is melted after the surge protector is overloaded and overheated.

21. The surge protector of claim 20, wherein the surge protector further comprises:

a spring; and

the arc isolating plate is arranged between the first electrode and the first fixing plate, a structure for fixing one end of the spring is arranged on the arc isolating plate, the other end of the spring is fixed on the first fixing plate, when the spring is fixed on the first fixing plate and the arc isolating plate, the spring is in a stretching state,

wherein when the low-temperature solder is melted, the welding part of the first electrode is separated from the first fixing plate, and the spring pulls the flash barrier to move and move through the welding point of the welding part of the first electrode and the first fixing plate, thereby disconnecting the first electrode from the circuit.

22. The surge protector of claim 21,

the arc separation plate comprises a main body structure and an extension structure extending at an angle with the main body structure, and at least the extension structure of the arc separation plate has a color;

the shell is provided with a hole, and the position of the hole is configured to enable the extension structure with the color of the flash barrier to be seen through the hole when the spring pulls the flash barrier to move and stop at the final position.

23. The surge protector of claim 16, further comprising a PCB board, wherein a capacitor is soldered to a first side of the PCB board, and wherein a trigger spring is soldered to a second side of the PCB board.

24. The surge protector of claim 23, wherein each of the pair of fixing plates includes a solder tail, and the PCB board is soldered and fixed to the fixing plate by the solder tail.

25. The surge protector of claim 1, wherein the electrode sheets comprise graphite sheets.