SMD (Surface Mount Device) surge protector and electronic equipment

Abstract

The utility model provides a surface-mounted surge protector and electronic equipment, and the surface-mounted surge protector comprises a housing assembly which is provided with a bottom plate and is internally provided with a sealed cavity; one end of the first patch pin electrode is located in the closed cavity, the other end of the first patch pin electrode is provided with a first bent part, the first bent part penetrates through the bottom plate and is located outside the closed cavity, and the surface, away from the bottom plate, of the first bent part is parallel to the bottom plate; one end of the second patch pin electrode is located in the closed cavity, the other end of the second patch pin electrode is provided with a second bent part, the second bent part penetrates through the bottom plate and is located outside the closed cavity, and the surface, away from the bottom plate, of the second bent part is parallel to the bottom plate. According to the invention, the SMD surge protector can be welded on the circuit board by adopting a surface mounting technology, and a plug-in design is not needed, so that the size of the product is greatly reduced, the installation is convenient, and the production efficiency can be greatly improved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of electricity, and more particularly relates to a patch type surge protector and electronic equipment. BACKGROUND

[0002] With the wide application and the continuous improvement of the integration degree of electronic equipment, the importance of circuit protection technology is increasingly prominent. As a kind of key circuit protection element, surge protector (SPD) is widely used in communication, power, industrial control and household appliances, etc. for resisting the damage of transient overvoltage (such as lightning, power grid fluctuation, etc.) to electronic equipment.

[0003] The traditional surge protector is mostly in the form of DIP (Dual In-line Package) package, which is characterized by connecting the pins with the circuit board through plugging. However, the DIP package has the following limitations:

[0004] Large volume: DIP package occupies more circuit board space, which is not conducive to the miniaturization and high-density integration requirements of modern electronic equipment.

[0005] Complex installation: DIP package needs to be installed through plugging, which increases the complexity and labor cost of installation.

[0006] Limitation of welding process: DIP package usually adopts wave soldering process, which may cause internal trip point separation due to uneven temperature during welding, affecting the reliability and stability of the product.

[0007] Insufficient heat dissipation performance: DIP package has limited internal space and poor heat dissipation performance, which is prone to cause the melting of internal trip points of the surge protector due to high temperature, resulting in trip phenomenon. INVENTION CONTENTS

[0008] The purpose of the embodiments of the application is to provide a patch type surge protector and electronic equipment to solve the technical problems of large volume, complex installation, low stability and easy to cause trip phenomenon in the welding process of the surge protector in the prior art.

[0009] To achieve the above purpose, the technical scheme adopted by the application is: in the first aspect, a patch type surge protector is provided, comprising:

[0010] A housing assembly having a bottom plate, a sealed cavity is arranged in the housing assembly;

[0011] A first patch pin electrode, one end of the first patch pin electrode is located in the sealed cavity, the other end of the first patch pin electrode has a first bending part, the first bending part passes through the bottom plate and is located outside the sealed cavity, and a surface of the first bending part away from the bottom plate is parallel to the bottom plate;

[0012] A second patch pin electrode, one end of the second patch pin electrode is located in the sealed cavity, the other end of the second patch pin electrode has a second bending part, the second bending part passes through the bottom plate and is located outside the sealed cavity, and a surface of the second bending part away from the bottom plate is parallel to the bottom plate.

[0013] As an optional implementation of the first aspect, the shell assembly comprises a shell and a mounting seat;

[0014] The mounting seat is arranged in the shell, the mounting seat has a partition plate perpendicular to the bottom plate, and the partition plate and the bottom plate divide the sealed cavity into a first cavity and a second cavity which are away from each other;

[0015] The first cavity is provided with a pressure-sensitive resistor, and the second cavity is provided with the first patch pin electrode, the second patch pin electrode, a tripping electrode and a tripping mechanism.

[0016] As an optional implementation of the first aspect, the pressure-sensitive resistor has a first electrode and a second electrode, and the first electrode and the second electrode pass through the partition plate and are located in the second cavity;

[0017] One end of the tripping electrode is welded to the first electrode, and the other end of the tripping electrode is connected to one end of the first patch pin electrode;

[0018] One end of the second patch pin electrode is connected to the second electrode;

[0019] The tripping mechanism is used for changing the pressure-sensitive resistor from a first state to a second state, the first state is that one end of the tripping electrode is in contact with the first electrode, and the second state is that one end of the tripping electrode is separated from the first electrode.

[0020] As an optional implementation of the first aspect, the tripping mechanism comprises a swing rod and an elastic piece, a middle part of the swing rod is rotatably installed on the partition plate, one end of the swing rod abuts against one end of the tripping electrode, the other end of the swing rod is connected to one end of the elastic piece, and the other end of the elastic piece is fixed on the partition plate.

[0021] As an optional implementation of the first aspect, it further comprises a first alarm electrode and a second alarm electrode;

[0022] One end of the first alarm electrode and one end of the second alarm electrode are located in the second cavity, and the one end of the first alarm electrode and the one end of the second alarm electrode are in contact and abut against the other end of the swing rod when the pressure-sensitive resistor is in the first state, and the one end of the first alarm electrode and the one end of the second alarm electrode are separated when the pressure-sensitive resistor is in the second state.

[0023] The other end of the first alarm electrode has a third bending part, the third bending part passes through the bottom plate and is located outside the sealed cavity, and a surface of the third bending part away from the bottom plate is parallel to the bottom plate.

[0024] The other end of the second alarm electrode has a fourth bending part, the fourth bending part passes through the bottom plate and is located outside the sealed cavity, and a surface of the fourth bending part away from the bottom plate is parallel to the bottom plate.

[0025] As an optional implementation of the first aspect, a flow guide plate is arranged in the second cavity, and the flow guide plate is arranged between the second electrode and the first alarm electrode and / or the second alarm electrode.

[0026] As an optional implementation of the first aspect, the first bending part has a first gap between a surface of the first bending part close to the bottom plate and the bottom plate, the second bending part has a second gap between a surface of the second bending part close to the bottom plate and the bottom plate, the third bending part has a third gap between a surface of the third bending part close to the bottom plate and the bottom plate, and the fourth bending part has a fourth gap between a surface of the fourth bending part close to the bottom plate and the bottom plate.

[0027] As an optional implementation of the first aspect, silica gel is arranged in the first cavity.

[0028] As an optional implementation of the first aspect, a heat insulation plate is arranged in the second cavity close to the first patch pin electrode, and the heat insulation plate, the first patch pin electrode, the partition plate, the shell and the bottom plate enclose a heat insulation cavity.

[0029] As an optional implementation of the first aspect, a first side plate is further arranged on the mounting seat, and a first positioning plate and a second positioning plate are arranged in the second cavity.

[0030] A first positioning groove for fixing the first patch pin electrode is formed between the first side plate and the first positioning plate.

[0031] A second positioning groove for fixing the tripping electrode is formed between the first side plate and the second positioning plate.

[0032] As an optional implementation of the first aspect, the mounting seat is further provided with a second side plate, and the second cavity is provided with a third positioning plate;

[0033] The second side plate and the third positioning plate form a third positioning groove for fixing the second patch pin electrode;

[0034] The third positioning plate close to the second patch pin electrode is provided with a thickened portion.

[0035] In a second aspect, an electronic device is provided, which comprises the patch-type surge protector according to any one of the first aspect.

[0036] The patch-type surge protector according to the embodiments of the present application can be welded on a circuit board by using surface mounting technology, without the need for plug-in design, thereby greatly reducing the size of the product, facilitating installation, and greatly improving production efficiency and reducing labor costs. In addition, the increase in the welding area of the two patch pin electrodes does not result in an increase in the size of the patch-type surge protector. By increasing the welding area of the patch pin electrodes, the temperature of the tripping welding point in the sealed cavity is less than the temperature of the patch pin electrode welding point when the patch pin electrodes are welded, thereby improving the firmness of the tripping welding point. The larger mounting plane area also enables the patch-type surge protector to withstand higher current impact, thereby improving the overall protection performance. BRIEF DESCRIPTION OF DRAWINGS

[0037] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiments or prior art description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0038] Figure 1 A structural schematic diagram of a patch-type surge protector provided by the embodiments of the present application is shown in FIG. 1.

[0039] Figure 2 An exploded structural schematic diagram of a patch-type surge protector provided by the embodiments of the present application is shown in FIG. 2. Figure 1 ;

[0040] Figure 3 An exploded structural schematic diagram of a patch-type surge protector provided by the embodiments of the present application is shown in FIG. 3. Figure 2 ;

[0041] Figure 4 A front structural schematic diagram of a patch-type surge protector provided by the embodiments of the present application is shown in FIG. 4.

[0042] Figure 5A structural schematic view of a shell provided for an embodiment of the present application is shown in FIG. 1.

[0043] Figure 6 A structural schematic view of a mounting seat provided for an embodiment of the present application is shown in FIG. 2. Figure 1

[0044] Figure 7 A structural schematic view of a piezoresistor provided for an embodiment of the present application is shown in FIG. 3.

[0045] Figure 8 A structural schematic view of a mounting seat provided for an embodiment of the present application is shown in FIG. 4. Figure 2

[0046] Figure 9 A sectional view of a patch type surge protector provided for an embodiment of the present application is shown in FIG. 5.

[0047] Figure 10 A structural schematic view of a patch type surge protector without a shell provided for an embodiment of the present application is shown in FIG. 6.

[0048] Figure 11 A structural schematic view of a swing lever provided for an embodiment of the present application is shown in FIG. 7.

[0049] In the figures, various reference signs are used:

[0050] ​​1 - housing, 101 - card slot, 102 - reinforcing rib, 103 - chamfer, 104 - support foot, 2 - first patch pin electrode, 201 - first bending part, 202 - first mounting plane, 3 - second patch pin electrode, 301 - second bending part, 302 - second mounting plane, 4 - first alarm electrode, 401 - third bending part, 402 - third mounting plane, 5 - second alarm electrode, 501 - fourth bending part, 502 - fourth mounting plane, 6 - tripping electrode, 7 - swing lever, 701 - shaft hole, 702 - connecting block, 8 - pressure sensitive resistor, 801 - first electrode, 802 - second electrode, 803 - positioning groove, 9 - mounting seat, 901 - partition plate, 902 - rotating shaft, 903 - support column, 904 - first through hole, 905 - second through hole, 906 - bottom plate, 907 - heat insulation plate, 908 - flow guide plate, 909 - first support block, 910 - second support block, 911 - first side plate, 912 - second side plate, 913 - buckle, 914 - first positioning plate, 915 - second positioning plate, 916 - third positioning plate, 917 - thickened part, 918 - first notch, 919 - second notch, 920 - first groove, 921 - second groove, 922 - third groove, 923 - fourth groove, 924 - fifth groove, 925 - sixth groove, 926 - first limiting block, 927 - second limiting block, 928 - positioning boss, 929 - heat insulation cavity, 930 - first positioning groove, 931 - second positioning groove, 932 - third positioning groove, 10 - spring, 11 - second cavity, 12 - first cavity, 13 - first gap, 14 - second gap, 15 - third gap, 16 - fourth gap, 17 - heat dissipation channel. DETAILED DESCRIPTION

[0051] In order to make the technical problems to be solved, technical solutions and beneficial effects of the present application clearer, the present application will be further described in detail below in combination with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and not used to limit the present application.

[0052] In the description of the embodiments of the present application, the term "a plurality of" refers to two or more (including two).

[0053] It should be noted that when an element is referred to as "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0054] It should be noted that in the embodiments of the present application, one end of an element can be understood as a first end of the element, and the other end of the element can be understood as a second end of the element.

[0055] In the description of the embodiments of the present application, unless specifically defined and limited otherwise, the terms "mounting", "connection", "connecting", "fixed", and the like should be interpreted broadly, for example, can be fixed connection, can also be detachable connection, or integrated; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0056] It should be understood that in the embodiments of the present application, "electrical connection" can be understood as physical contact and electrical conduction of components; it can also be understood as the form of connection between different components through the entity circuit of the copper foil or wire of the printed circuit board (PCB) that can transmit electrical signals in the circuit structure.

[0057] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0058] In addition, the terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically defined.

[0059] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship between the associated objects, which means that there can be three relationships, for example, A and / or B, which can mean that there are three cases of A alone, A and B together, and B alone. In addition, the character " / " in this paper generally represents that the front and rear associated objects have an "or" relationship.

[0060] Reference to“an embodiment” herein means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment. The appearances of the phrase“in one embodiment” in various places in the specification are not necessarily referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. As will be apparent to those of ordinary skill in the art, embodiments described herein can be combined with other embodiments in any way deemed suitable by those of ordinary skill in the art.

[0061] Referring to Figure 1 , a patch type surge protector provided by the embodiment of the present application is described as follows. The patch type surge protector comprises a shell assembly having a bottom plate 906, and a sealed cavity is arranged in the shell assembly. One end of a first patch pin electrode 2 is located in the sealed cavity, and the other end of the first patch pin electrode 2 has a first bending part 201. The first bending part 201 passes through the bottom plate 906 of the shell assembly and is located outside the sealed cavity, and a surface of the first bending part 201 away from the bottom plate 906 is parallel to the bottom plate 906. One end of a second patch pin electrode 3 is located in the sealed cavity, and the other end of the second patch pin electrode 3 has a second bending part 301. The second bending part 301 passes through the bottom plate 906 of the shell assembly and is located outside the sealed cavity, and a surface of the second bending part 301 away from the bottom plate 906 is parallel to the bottom plate 906.

[0062] Referring to Figure 2 , Figure 3 The other end of the first patch pin electrode 2 is bent into the first bending part 201, and a surface of the first bending part 201 away from the bottom plate 906 is a first patch mounting plane 202. The first patch mounting plane 202 is used for patch mounting and welding with a circuit board. Therefore, the patch type surge protector of the embodiment of the present application is an SMD (Surface Mount Device) surge protector.

[0063] It should be noted that the patch type surge protector of the embodiment of the present application is different from the welding method of the existing DIP (Dual In-line Package) surge protector. The existing DIP surge protector adopts wave soldering, while the patch type surge protector of the present application can adopt reflow soldering process. Reflow soldering is to mount the patch type surge protector on the circuit board, and the solder is melted by high-temperature gas to realize welding. In the welding process, the welding point between the first bending part 201 and the circuit board is directly exposed to the high-temperature gas, so that the welding point between the first bending part 201 and the circuit board will quickly melt to complete the welding. The trip welding point in the sealed cavity is welded by tin paste, but since the trip welding point is located in the sealed cavity, the shell assembly plays a heat insulation role, so the trip welding point is less heated and melts slowly, so that the trip welding point will not melt before the welding point between the first bending part 201 and the circuit board is welded, so that the trip phenomenon will not occur. In addition, the reflow soldering process can greatly improve the production efficiency, reduce the labor cost and facilitate the installation.

[0064] Compared with the existing DIP surge protector, the patch type surge protector of the present application has the advantage of smaller volume, because the patch type surge protector adopts surface mount technology and can be directly welded on the circuit board, without the need to design plug-in pin electrodes, thereby greatly reducing the volume of the product.

[0065] The design of the first bending part 201 can increase the area of the first mounting plane 202 without increasing the volume of the patch type surge protector, that is, increase the welding area between the first bending part 201 and the circuit board. Increasing the area of the first mounting plane 202 can make the patch type surge protector have less heat transferred to the trip welding point during reflow soldering, so that the temperature of the trip welding point is less than the welding temperature of the first bending part 201 and the circuit board, ensuring the firmness of the trip welding point, thereby realizing electrical connection. The larger area of the first mounting plane 202 also enables the patch type surge protector to withstand higher current impact, improving the overall protection performance.

[0066] Optionally, referring to Figure 4 , the first bending part 201 has a first gap 13 between one surface close to the bottom plate 906 and the bottom plate 906, which can reduce the heat transferred to the bottom plate 906 during reflow soldering of the patch type surge protector, so that the temperature of the trip welding point in the sealed cavity does not rise rapidly to cause the trip welding point to trip.

[0067] Similarly, the other end of the second patch pin electrode 3 is bent into a second bent portion 301, and a surface of the second bent portion 301 away from the bottom plate 906 is a second patch mounting plane 302. The second bent portion 301 has a second gap 14 between a surface close to the bottom plate 906 and the bottom plate 906. The design principle and effect of the second patch pin electrode 3 are the same as those of the first patch pin electrode 2, and will not be described here.

[0068] As an optional embodiment, referring to Figure 2 、 Figure 3 , the shell assembly includes a shell and a mounting seat 9; the mounting seat 9 is arranged in the shell, and the mounting seat 9 has a partition plate 901 perpendicular to the bottom plate 906, and the partition plate 901 and the bottom plate 906 divide the closed cavity into the first cavity 12 and the second cavity 11 which are away from each other; the pressure-sensitive resistor 8 is arranged in the first cavity 12, and the first patch pin electrode 2, the second patch pin electrode 3, the tripping electrode 6 and the tripping mechanism are arranged in the second cavity 11.

[0069] Optionally, when the second cavity 11 is designed, the space of the second cavity 11 can be arranged to be larger, and the larger space is more conducive to heat dissipation and heat insulation inside the second cavity 11, thereby reducing the risk of tripping failure of the tripping solder joint in the soldering process.

[0070] Referring to Figure 5 、 Figure 6 , the shell 1 is a box-shaped structure with one side open, and the open side of the shell 1 is arranged opposite to the bottom plate 906. The shell 1 is provided with a clamping groove 101, and the mounting seat 9 is provided with a clamping buckle 913 matched with the clamping groove 101. The mounting seat 9 is fixed in the shell 1 through the cooperation of the clamping buckle 913 and the clamping groove 101, forming a closed closed cavity. The bottom plate 906 and the partition plate 901 of the mounting seat 9 can be integrally formed.

[0071] Referring to Figure 5 , a plurality of reinforcing ribs 102 are arranged on the inner side wall of the shell 1. The mechanical strength of the shell 1 is improved, and at the same time, the gaps formed between the reinforcing ribs 102 reduce the contact area between the shell 1 and the mounting seat 9, effectively reducing heat conduction. Therefore, in the reflow soldering process, the influence of the circulating high-temperature gas on the internal components is reduced, and in particular, the risk of failure of the tripping solder joint caused by the influence of the high-temperature gas is reduced.

[0072] The reinforcing rib 102 close to the open side can be provided with a chamfer 103. The design of the chamfer 103 helps the mounting seat 9 to be smoothly inserted into the shell 1 and fixed.

[0073] The open side edges of the housing 1 are provided with support feet 104, so that the support feet 104 provide stable support when welding the patch-type surge protector, avoiding poor welding caused by electrode tilting. In addition, the gaps between adjacent support feet 104 form heat dissipation channels 17, which allow the heat generated during welding to not accumulate between the circuit board and the bottom plate 906, reducing the heat transfer to the bottom plate 906 and further to the sealed cavity, causing the temperature of the tripping solder joint to rise.

[0074] The housing 1 and the mounting seat 9 are made of high-temperature-resistant materials, such as polyphenylene sulfide (PPS), polyether ether ketone (PEEK), ceramics, etc., so as not to deform during reflow soldering, improving the durability and safety of the product, and the high-temperature-resistant materials also reduce the heat transfer efficiency.

[0075] The embodiment effectively isolates electrical interference by placing the pressure-sensitive resistor 8 in the first cavity 12 and placing the first patch pin electrode 2, the second patch pin electrode 3, the tripping electrode 6, and the tripping mechanism in the second cavity 11, improving the protection performance. The tripping mechanism quickly disconnects the circuit when overloaded to ensure safety. The overall design is compact, allowing more space to be provided in the second cavity 11, thereby advantageously solving the problem of heat dissipation and heat insulation inside the second cavity 11.

[0076] As an optional implementation, referring to Figure 6-9 , the pressure-sensitive resistor 8 has a first electrode 801 and a second electrode 802, the first electrode 801 and the second electrode 802 pass through the partition plate 901 and are located in the second cavity 11; one end of the tripping electrode 6 is welded to the first electrode 801, and the other end of the tripping electrode 6 is connected to one end of the first patch pin electrode 2; one end of the second patch pin electrode 3 is connected to the second electrode 802; the tripping mechanism is used to change the pressure-sensitive resistor 8 from a first state to a second state, the first state being a state in which one end of the tripping electrode 6 is in contact with the first electrode 801, and the second state being a state in which one end of the tripping electrode 6 is separated from the first electrode 801.

[0077] Referring to Figure 6 , the partition plate 901 is provided with a first through hole 904 and a second through hole 905, the first through hole 904 being used for the first electrode 801 to pass through, and the second through hole 905 being used for the second electrode 802 to pass through. Referring to Figure 7 , the side of the pressure-sensitive resistor 8 close to the partition plate 901 is also provided with a positioning groove 803. Referring to Figure 8 , the partition plate 901 located in the first cavity 12 is also provided with a positioning boss 928 matched with the positioning groove 803, and the pressure-sensitive resistor 8 is accurately fixed by the positioning groove 803 and the positioning boss 928, realizing the pre-positioning of the pressure-sensitive resistor 8.

[0078] Referring to Figure 9, one end of the tripping electrode 6 is soldered with the first electrode 801 by tin paste, and the soldering point is a tripping soldering point. The other end of the tripping electrode 6 is soldered with one end of the first patch pin electrode 2 by tin, and one end of the second patch pin electrode 3 is soldered with the second electrode 802 by tin. The silicone is poured into the first cavity 12 containing the pressure sensitive resistor 8 to seal, and the packaging of the pressure sensitive resistor 8 is completed.

[0079] The pressure sensitive resistor 8 is a nonlinear element, whose resistance changes significantly with voltage, which can effectively absorb transient overvoltage and protect the circuit from damage. In the normal working voltage state, the pressure sensitive resistor 8 maintains a high resistance state and almost does not conduct electricity, at this time, the pressure sensitive resistor 8 is in the first state, that is, the state that one end of the tripping electrode 6 is in contact with the first electrode 801. When the pressure sensitive resistor deteriorates or long-term overvoltage, the resistance of the pressure sensitive resistor 8 decreases, and the current is quickly discharged to prevent voltage impact. In this process, the pressure sensitive resistor 8 generates heat, and the soldering point of one end of the tripping electrode 6 and the first electrode 801 is melted by heat, and the pressure sensitive resistor 8 switches to the second state, that is, the state that one end of the tripping electrode 6 is separated from the first electrode 801, thereby cutting off the circuit and avoiding damage to the equipment in the circuit.

[0080] As an optional implementation, referring to Figure 6 , Figure 10 The tripping mechanism includes a swing rod 7 and a spring, the middle part of the swing rod 7 is rotatably installed on the partition plate 901, one end of the swing rod 7 abuts against one end of the tripping electrode 6, and the other end of the swing rod 7 is connected with one end of the spring, and the other end of the spring is fixed on the partition plate 901.

[0081] Optionally, the spring is a spring 10, and in this embodiment, the spring 10 is in a stretched state in the first state.

[0082] Referring to Figure 6 , the partition plate 901 located in the second cavity is provided with a rotating shaft 902, referring to Figure 11 , the swing rod 7 is provided with an axle hole 701, and the axle hole 701 cooperates with the rotating shaft 902, so that the swing rod 7 can rotate around the rotating shaft 902. One end of the swing rod 7 abuts against one end of the tripping electrode 6, and the other end of the swing rod 7 is provided with a connecting block 702, and one end of the spring 10 is sleeved on the connecting block 702. The partition plate 901 located in the second cavity is also provided with a support 903, and the other end of the spring 10 is sleeved on the support 903.

[0083] Under the normal working voltage, the spring 10 maintains a stretched state, one end of the swing rod 7 abuts against one end of the tripping electrode 6, and the pressure sensitive resistor 8 maintains the first state. When the voltage suddenly rises, the resistance of the pressure sensitive resistor 8 suddenly drops, the tripping soldering point between the tripping electrode 6 and the first electrode 801 melts, and the swing rod 7 rotates under the action of the spring 10 according to Figure 10Rotate counterclockwise to separate the tripping electrode 6 from the first electrode 801, cut off the circuit, and prevent damage to the equipment in the circuit.

[0084] As an optional implementation, see [link to implementation details]. Figure 2 , Figure 10 The patch surge protector of this embodiment also includes a first alarm electrode 4 and a second alarm electrode 5; one end of the first alarm electrode 4 and one end of the second alarm electrode 5 are located in the second cavity. When the varistor 8 is in the first state, one end of the first alarm electrode 4 and one end of the second alarm electrode 5 are in contact and abut against the other end of the swing arm 7. When the varistor 8 is in the second state, one end of the first alarm electrode 4 and one end of the second alarm electrode 5 are separated; the other end of the first alarm electrode 4 has a third bend 401, which passes through the base plate 906 and is located outside the sealed cavity, and a surface of the third bend 401 away from the base plate 906 is parallel to the base plate 906; the other end of the second alarm electrode 5 has a fourth bend 501, which passes through the base plate 906 and is located outside the sealed cavity, and a surface of the fourth bend 501 away from the base plate 906 is parallel to the base plate 906.

[0085] See Figure 6 A third groove 922 and a fourth groove 923 are provided on the bottom plate 906 corresponding to the second cavity, and a first support block 909 and a second support block 910 are provided on the partition plate 901 corresponding to the second cavity. See also Figure 10 In the first state, the third bend 401 of the first alarm electrode 4 passes through the third groove 922. After being bent, the middle part of the first alarm electrode 4 abuts against the first support block 909, and one end of the first alarm electrode 4 abuts against one end of the connecting block 702 of the swing arm 7. The fourth bend 501 of the second alarm electrode 5 passes through the fourth groove 923. After being bent, the middle part of the second alarm electrode 5 abuts against the second support block 910, and one end of the second alarm electrode 5 abuts against one end of the first alarm electrode 4. When the voltage is abnormal, the varistor 8 heats up and the trip solder joint melts, the varistor 8 switches to the second state, and the first alarm electrode 4 and the second alarm electrode 5 separate. At this time, the alarm circuit is activated and an alarm signal is issued to indicate that the system voltage is abnormal. Through this design, the surface-mount surge protector can not only effectively cut off the faulty circuit, but also promptly notify maintenance personnel to ensure the safe and stable operation of the system.

[0086] See Figure 6, in order to improve the installation stability of the first alarm electrode 4 and the second alarm electrode 5, a fifth groove 924 and a sixth groove 925 are also formed on the bottom plate 906 corresponding to the second cavity, and a first limiting block 926 and a second limiting block 927 are arranged on the partition plate 901 corresponding to the second cavity. The end of the third bending part 401 passes through the fifth groove 924 and is fixed by the channel formed between the first limiting block 926 and the bottom plate 906, so that the first alarm electrode 4 does not displace under vibration or impact, causing false alarm. Similarly, the end of the fourth bending part 501 passes through the sixth groove 925 and is fixed by the channel formed between the second limiting block 927 and the bottom plate 906.

[0087] Referring to Figure 10 , one surface of the third bending part 401 away from the bottom plate 906 is a third mounting plane 402, and the third mounting plane 402 is welded with the circuit board through tin paste. Referring to Figure 4 , one surface of the third bending part 401 close to the bottom plate 906 has a third gap 15 with the bottom plate 906, and the design of the third gap 15 can reduce the heat entering the second cavity. Similarly, one surface of the fourth bending part 501 away from the bottom plate 906 is a fourth mounting plane 502, and one surface of the fourth bending part 501 close to the bottom plate 906 has a fourth gap 16 with the bottom plate 906.

[0088] As an optional embodiment, referring to Figure 10 , a flow guide plate 908 is arranged in the second cavity, and the flow guide plate 908 is arranged between the second electrode 802 and the first alarm electrode 4 and / or the second alarm electrode 5.

[0089] Referring to Figure 10 , the second electrode 802 is located above the first alarm electrode 4 and the second alarm electrode 5, and when the tripping electrode 6 and the first electrode 801 are welded or the tripping electrode 6 and the first electrode 801 are melted by heat, tin paste may fall. In order to prevent the tin paste from falling on the first alarm electrode 4 and the second alarm electrode 5, the flow guide plate 908 can effectively guide the tin paste flow to avoid short circuit or false alarm, improve the safety of the welding process and the reliability of the alarm.

[0090] As an optional embodiment, referring to Figure 10 , a heat insulation plate 907 is arranged in the second cavity close to the first patch pin electrode 2, and the heat insulation plate 907, the first patch pin electrode 2, the partition plate 901, the shell and the bottom plate 906 form a heat insulation cavity 929.

[0091] Specifically, the heat insulation plate 907 is in L-shaped structure, and the heat insulation cavity 929 is a closed cavity. The heat insulation cavity 929 can effectively isolate the heat generated by the first patch pin electrode 2, reduce the heat transfer to the second cavity 11, cause the melting of the trip-off welding point between the trip-off electrode 6 and the first electrode 801 due to the heat, and thus avoid the false triggering of the trip-off mechanism.

[0092] As an optional embodiment, referring to Figure 6 , the mounting seat 9 is further provided with a first side plate 911, and the second cavity is provided with a first positioning plate 914 and a second positioning plate 915. The first side plate 911 and the first positioning plate 914 form a first positioning groove 930 for fixing the first patch pin electrode 2. The first side plate 911 and the second positioning plate 915 form a second positioning groove 931 for fixing the trip-off electrode 6.

[0093] Specifically, referring to Figure 6 , the bottom plate 906 is provided with a first recess 920 and a second recess 921. The first recess 920 is configured to allow the first patch pin electrode 2 to pass through. The second recess 921 is configured to allow the second patch pin electrode 3 to pass through.

[0094] The first side plate 911 is perpendicular to the partition plate 901 and the bottom plate 906. The first positioning groove 930 is oppositely arranged with the first recess 920. The first patch pin electrode 2 is fixed in the first positioning groove 930 and the first recess 920.

[0095] Referring to Figure 6 , the first side plate 911, the first positioning plate 914, and the second positioning plate 915 have a first gap 918 therebetween. Referring to Figure 10 , one end of the first patch pin electrode 2 and the other end of the trip-off electrode 6 are located in the first gap 918, thereby facilitating the welding operation of the electrodes.

[0096] As an optional embodiment, referring to Figure 6 , the mounting seat 9 is further provided with a second side plate 912, and the second cavity is provided with a third positioning plate 916. The second side plate 912 and the third positioning plate 916 form a third positioning groove 932 for fixing the second patch pin electrode 3. The third positioning plate 916 close to the second patch pin electrode 3 is provided with a thickened portion 917.

[0097] Specifically, the second side plate 912 is provided with a second gap 919. The second through hole 905 is arranged opposite to the second gap 919. One end of the second patch pin electrode 3 and the second electrode 802 are welded in the second gap 919.

[0098] The third positioning plate 916 close to the second patch pin electrode 3 is provided with a thickened part 917, which is designed to reduce the heat transferred into the second cavity, enhance the heat insulation effect, and reduce the risk of the trip electrode 6 and the first electrode 801 tripping.

[0099] The embodiments of the present application also provide an electronic device, which comprises the patch base surge protector.

[0100] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should be covered in the scope of the claims and the specification of the present application. Especially, as long as there is no structural conflict, each technical feature mentioned in each embodiment can be combined in any way. The present application is not limited to the specific embodiments disclosed in the text, but includes all technical solutions falling within the scope of the claims.

Claims

1. A patch surge protector, characterized by, The application relates to a shell assembly and a pressure-sensitive resistor. The shell assembly comprises a bottom plate, and a sealed cavity is arranged in the shell assembly. One end of a first patch pin electrode is arranged in the sealed cavity, and the other end of the first patch pin electrode has a first bending part which is arranged outside the sealed cavity through the bottom plate and is parallel to one surface of the bottom plate. One end of a second patch pin electrode is arranged in the sealed cavity, and the other end of the second patch pin electrode has a second bending part which is arranged outside the sealed cavity through the bottom plate and is parallel to one surface of the bottom plate.

2. The patch surge protector of claim 1, wherein, The shell assembly comprises a shell and a mounting base. The mounting base is arranged in the shell, and the mounting base has a partition plate which is perpendicular to the bottom plate, and the partition plate and the bottom plate divide the sealed cavity into a first cavity and a second cavity which are opposite to each other. A pressure-sensitive resistor is arranged in the first cavity, and the second cavity is provided with the first patch pin electrode, the second patch pin electrode, a tripping electrode and a tripping mechanism.

3. The patch surge protector of claim 2, wherein, The pressure-sensitive resistor has a first electrode and a second electrode, and the first electrode and the second electrode are arranged in the second cavity through the partition plate. One end of the tripping electrode is welded to the first electrode, and the other end of the tripping electrode is connected to one end of the first patch pin electrode. One end of the second patch pin electrode is connected to the second electrode. The tripping mechanism is used for changing the pressure-sensitive resistor from a first state to a second state, the first state is that one end of the tripping electrode is in contact with the first electrode, and the second state is that one end of the tripping electrode is separated from the first electrode.

4. The patch surge protector of claim 3, wherein, The tripping mechanism comprises a swing rod and an elastic piece, the middle part of the swing rod is rotatably arranged on the partition plate, one end of the swing rod is abutted against one end of the tripping electrode, the other end of the swing rod is connected to one end of the elastic piece, and the other end of the elastic piece is fixed on the partition plate.

5. The patch surge protector of claim 4, wherein, The application further comprises a first alarm electrode and a second alarm electrode. One end of the first alarm electrode and one end of the second alarm electrode are arranged in the second cavity, one end of the first alarm electrode and one end of the second alarm electrode are in contact and abut against the other end of the swing rod when the pressure-sensitive resistor is in the first state, and one end of the first alarm electrode and one end of the second alarm electrode are separated when the pressure-sensitive resistor is in the second state. The other end of the first alarm electrode has a third bending part which is arranged outside the sealed cavity through the bottom plate and is parallel to one surface of the bottom plate. The other end of the second alarm electrode has a fourth bending part which is arranged outside the sealed cavity through the bottom plate and is parallel to one surface of the bottom plate.

6. The patch surge protector of claim 5, wherein, A flow guide plate is arranged in the second cavity and between the second electrode and the first alarm electrode and / or the second alarm electrode.

7. The patch surge protector of claim 5, wherein, The first bending part has a first gap between a surface close to the bottom plate and the bottom plate, the second bending part has a second gap between a surface close to the bottom plate and the bottom plate; the third bending part has a third gap between a surface close to the bottom plate and the bottom plate, and the fourth bending part has a fourth gap between a surface close to the bottom plate and the bottom plate.

8. The patch surge protector of claim 2, wherein, The first cavity is provided with silica gel.

9. The patch surge protector of any of claims 2-8, wherein, A heat insulation plate is arranged in the second cavity close to the first patch pin electrode, and the heat insulation plate, the first patch pin electrode, the partition plate, the shell and the bottom plate enclose a heat insulation cavity.

10. The patch surge protector of any of claims 2-8, wherein, The mounting seat is further provided with a first side plate, and the second cavity is provided with a first positioning plate and a second positioning plate; The first side plate and the first positioning plate form a first positioning groove for fixing the first patch pin electrode; The first side plate and the second positioning plate form a second positioning groove for fixing the tripping electrode.

11. The patch surge protector of any of claims 2-8, wherein, The mounting seat is further provided with a second side plate, and the second cavity is provided with a third positioning plate; The second side plate and the third positioning plate form a third positioning groove for fixing the second patch pin electrode; The third positioning plate close to the second patch pin electrode is provided with a thickened part.

12. An electronic device, comprising: The patch type surge protector comprises the patch type surge protector according to any one of claims 1-11.

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