A board-mounted surge protector with remote signaling alarm function for PCB welding

Abstract

This utility model discloses an onboard surge protector with remote signaling alarm function for PCB soldering, comprising a module shell, an inner module shell, a varistor chip, a large plug, a small plug, a trip piece, an indicator, a tension spring, and a micro switch. The large and small plugs are elastic structures used for PCB board mounting and soldering. The varistor chip is mounted in the pin holes of the inner module shell and connected to the small plug and the trip piece via solder. The trip piece is connected to the varistor chip via low-temperature solder; it melts upon overheating, triggering tripping, and the tension spring and indicator work together to achieve the tripping action. The micro switch is triggered upon tripping, outputting an alarm signal, and the module shell has a tripping indicator window. Its surge protection capability ranges from a rated discharge current of 20kA and a maximum discharge current of 40kA to a rated discharge current of 30kA and a maximum discharge current of 60kA. It is suitable for onboard installation on low-voltage AC and DC photovoltaic systems, solving the problems of large size, single alarm function, and low surge current protection.

Description

Technical Field

[0001] This utility model relates to the field of surge protector technology, and in particular to an onboard surge protector with remote signaling alarm function for PCB soldering. Background Technology

[0002] Surge protectors, also known as lightning arresters, are electronic devices that provide safety protection for various electronic equipment, instruments, and communication lines. When a surge current or voltage spike suddenly occurs in an electrical circuit or communication line due to external interference, it can conduct and divert the current in a very short time, preventing the surge from damaging other equipment in the circuit.

[0003] With the miniaturization of electronic and communication equipment and the requirement for overall cost control, the market demand for a new generation of miniature high-current surge protection modules that can be directly installed on the power boards (PCBs) of AC or DC photovoltaic systems is becoming increasingly urgent.

[0004] However, traditional surge protectors are bulky, resulting in large design space requirements and high design complexity. For onboard surge protectors, while possessing high current-carrying capacity, miniaturization is also necessary. This necessitates strict consideration of space constraints when designing each module, while simultaneously meeting the functional requirements of onboard surge protectors for low-voltage AC systems or DC photovoltaic power systems. This places even higher demands on the design of surge protectors. Utility Model Content

[0005] The problem this invention aims to solve is to propose an onboard surge protector with remote signaling alarm function for PCB soldering, which aims to address the technical problems of large size, single alarm mode, and low lightning current protection of existing low-voltage power supply surge protection modules.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: an onboard surge protector with remote signaling alarm function for PCB soldering, comprising:

[0007] Module outer shell and module inner shell;

[0008] A pressure-sensitive chip is installed in two pin holes in the inner shell of the module;

[0009] The large plug and the small plug are respectively located on the right and left sides of the module's inner shell. The large plug is connected to the trip piece via a copper braid, and the small plug is connected to a pin of the varistor chip via solder.

[0010] The trip piece is installed on the positioning post at the upper end of the module's inner shell and is connected to another pin of the varistor chip via low-temperature soldering.

[0011] The indicator and the tension spring, one end of the tension spring is hooked into the round hole at the end of the indicator, and the other end is hooked into the round hole at the end of the large plug. The other round hole of the indicator is inserted into the positioning post at the lower end of the inner shell of the module.

[0012] The micro switch is installed at the lower end of the module's inner shell. When the trip piece trips, it contacts the end of the trip piece and sends an alarm signal.

[0013] Preferably, in the above-mentioned onboard surge protector with remote signaling alarm function for PCB soldering, the large plug and the small plug are elastic structures used for PCB board mounting, fixing and soldering.

[0014] Preferably, in the above-mentioned onboard surge protector with remote signaling alarm function for PCB soldering, the tension spring applies tension to the indicator when the varistor chip is working normally. When the varistor chip heats up, the indicator pushes the trip piece to move in an arc around the positioning post, thereby disconnecting from the pins of the varistor chip.

[0015] Preferably, in the above-mentioned onboard surge protector with remote signaling alarm function for PCB soldering, the micro switch has normally open and normally closed contacts, and a tripping indicator window is provided above the module to identify whether the module has failed.

[0016] Preferably, the above-mentioned onboard surge protector with remote signaling alarm function for PCB soldering has a lightning protection capability of rated discharge current of 20 kA and maximum discharge current of 40 kA to rated discharge current of 30 kA and maximum discharge current of 60 kA, and is suitable for onboard installation on PCBs of low-voltage AC systems or DC photovoltaic systems.

[0017] Preferably, in the above-mentioned onboard surge protector with remote signaling alarm function for PCB soldering, the trip plate and the varistor chip are connected by low-temperature solder. When the varistor chip overheats, the low-temperature solder melts and triggers the trip protection.

[0018] The advantages and beneficial effects of this utility model are:

[0019] This utility model proposes an onboard surge protector with remote signaling alarm function for PCB soldering. Its module structure is compact and small in size. By optimizing the layout and connection of each component, it achieves miniaturization while meeting the functional requirements of onboard surge protectors for low-voltage AC systems or DC photovoltaic systems. This makes it easier to install on the PCB board and adapts to the trend of miniaturization in electronic and communication equipment.

[0020] This invention employs a microswitch as the alarm element, which has normally open and normally closed contacts, providing users with a flexible alarm signal selection. Simultaneously, a tripping indicator window is provided above the module, allowing for direct identification of module failure. This dual alarm mechanism, combining electrical signal alarm and visual alarm, overcomes the shortcomings of existing technologies with their single alarm method. It facilitates users in obtaining timely and accurate information about the surge protector's operating status, improving the convenience and timeliness of equipment maintenance.

[0021] This utility model's surge protector has strong lightning protection capabilities, with a rated discharge current of up to 20,000 amps and a maximum discharge current of up to 40,000 amps. It is suitable for PCB mounting in low-voltage AC systems or DC photovoltaic systems. The varistor chip has a reasonable layout design, which can quickly conduct and divert the surge energy to the ground when encountering instantaneous overvoltages such as lightning strikes, protecting downstream electrical equipment and improving the reliability and stability of the equipment in complex electromagnetic environments.

[0022] This invention connects the trip piece and the varistor chip via low-temperature solder. When the varistor chip overheats, the low-temperature solder melts, and the tension of the spring pushes the trip piece to move in an arc around the positioning post via an indicator, achieving electrical tripping by disconnecting it from the pins of the varistor chip. After tripping, the elastic structure of the large and small plugs remains mechanically fixed, preventing the module from falling off the PCB board and ensuring that the electrical circuit is disconnected, preventing further expansion of the fault, thereby ensuring the safe operation of the low-voltage AC system and the DC photovoltaic system.

[0023] This utility model uses a flexible structure with a large plug and a small plug. This design makes it easier to install, fix, and solder on the PCB board, improving production efficiency, reducing installation difficulty and cost, and enhancing the product's practicality and market competitiveness. Attached Figure Description

[0024] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0025] Figure 2 This is a frontal three-dimensional internal structure schematic diagram of this utility model;

[0026] Figure 3 This is a bottom-view three-dimensional structural diagram of the present invention;

[0027] Figure 4 This is a three-dimensional structural diagram of the utility model, copper braided belt, and [other components].

[0028] In the diagram: 1. Module outer shell; 2. Module inner shell; 3. Pressure-sensitive chip; 4. Small plug; 5. Large plug; 6. Tripping piece; 7. Indicator; 8. Tension spring; 9. Micro switch. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0030] like Figures 1 to 4 As shown, an onboard surge protector with remote signaling alarm function for PCB soldering includes a module housing 1 and a module inner housing 2.

[0031] The pressure-sensitive chip 3 is installed in the two pin holes of the inner shell 2 of the module;

[0032] The large plug 5 and the small plug 4 are respectively located on the right and left sides of the inner shell 2 of the module. The large plug 5 is connected to the trip piece 6 through a copper braided strip, and the small plug 4 is connected to one pin of the pressure-sensitive chip 3 through solder.

[0033] The trip piece 6 is installed on the positioning post at the upper end of the inner shell 2 of the module and is connected to another pin of the varistor chip 3 by low-temperature soldering.

[0034] The indicator 7 and the tension spring 8 are connected. One end of the tension spring 8 is hooked into the round hole at the end of the indicator 7, and the other end is hooked into the round hole at the end of the large plug 5. The other round hole of the indicator 7 is inserted into the positioning post at the lower end of the inner shell 2 of the module.

[0035] The micro switch 9 is installed at the lower end of the inner shell 2 of the module. When the trip piece 6 trips, it contacts the end of the trip piece 6 and sends an alarm signal.

[0036] The large plug 5 and the small plug 4 are spring-loaded structures used for PCB board mounting, fixing, and soldering.

[0037] When the pressure-sensitive chip 3 is working normally, the tension spring 8 applies tension to the indicator 7. When the pressure-sensitive chip 3 heats up, the indicator 7 pushes the trip piece 6 to move in an arc around the positioning post, thereby disconnecting from the pin of the pressure-sensitive chip 3.

[0038] The micro switch 9 has normally open and normally closed contacts, and a trip indicator window is set on the top of the module to identify whether the module has failed.

[0039] The surge protector has a lightning protection capability of rated discharge current of 20 kA and maximum discharge current of 40 kA to rated discharge current of 30 kA and maximum discharge current of 60 kA. It is suitable for PCB board mounting in low-voltage AC systems or DC photovoltaic systems.

[0040] The trip piece 6 is connected to the varistor chip 3 via low-temperature solder. When the varistor chip 3 overheats, the low-temperature solder melts, triggering trip protection. The module housing 1 is used to encapsulate and protect the internal components and has a trip indicator window to display the module's operating status. The module inner housing 2 supports and fixes the varistor chip, plug, trip piece, and other internal components, providing a structural mounting base. The varistor chip 3 is installed in the two pin holes of the module inner housing, used to quickly conduct and shunt current when surge voltage or current occurs, protecting downstream equipment. The large plug 5 is located on the right side of the module inner housing and is a spring structure used for PCB board mounting, fixing, and soldering. It is connected to the trip piece via copper braided straps to form an electrical path. The small plug 4 is located on the left side of the module inner housing and is a spring structure used for PCB board mounting, fixing, and soldering. It is electrically connected to one pin of the varistor chip via solder. The trip piece 6 is installed on the upper positioning post of the module inner housing and is connected to the other pin of the varistor chip via low-temperature solder. When overheated, the low-temperature solder melts, triggering tripping and disconnecting the circuit. One end of the indicator 7 is inserted into the positioning post at the lower end of the module's inner shell, and the other end is connected to the large plug via a tension spring. It is used to indicate the module's failure status through position changes during tripping. One end of the tension spring 8 is hooked into the circular hole at the end of the indicator, and the other end is hooked into the circular hole at the end of the large plug. It is used to apply tension when the pressure-sensitive chip is working normally, and pushes the indicator to actuate the trip piece during tripping. The microswitch 9 is installed at the lower end of the module's inner shell. When the trip piece trips, it contacts the microswitch's end, outputting an alarm signal through normally open / normally closed contacts to achieve remote alarm functionality.

[0041] Working Principle: When the surge protector of this invention is installed on a PCB board, the elastic structure of the small plug 4 and the large plug 5 is fixed to the circuit board by welding, forming an electrical connection circuit. The varistor chip 3 is installed in the pin hole of the inner shell 2 of the module, one end of which is connected to the small plug 4 by solder, and the other end is connected to the trip piece 6 by low-temperature solder. The trip piece 6 is installed on the positioning post at the upper end of the inner shell 2 of the module. One end of the tension spring 8 is hooked into the round hole at the end of the indicator 7, and the other end is hooked into the round hole at the end of the large plug 5, so that the indicator 7 applies a pulling force to the trip piece 6, ensuring that the low-temperature solder connection between the trip piece 6 and the varistor chip 3 is in a conductive state.

[0042] When a surge voltage or current occurs in the circuit, the varistor chip 3 quickly conducts and diverts the surge energy to the ground, protecting the downstream electrical equipment. At this time, the tension of the tension spring 8 maintains the connection state of the trip piece 6 through the indicator 7, the micro switch 9 is not triggered, and the trip indicator window on the top of the module housing 1 shows the normal working status.

[0043] In some practical applications, the tripping and alarm process under abnormal working conditions is as follows;

[0044] 1. Overheat trigger tripping: When the varistor chip 3 heats up due to continuous overcurrent or aging, and the temperature reaches the melting point of the low-temperature solder, the low-temperature solder between the tripping piece 6 and the varistor chip 3 melts, and the connection is broken.

[0045] 2. Mechanical tripping action: After the low-temperature solder melts, the tension of the tension spring 8 is unrestrained. The indicator 7 pushes the tripping piece 6 to move in an arc around the positioning post at the upper end of the module inner shell 2, so that the tripping piece 6 is completely separated from the pin of the pressure-sensitive chip 3, realizing electrical tripping and preventing the fault from spreading.

[0046] 3. Remote alarm triggering: When the trip piece 6 trips, its end contacts the micro switch 9 installed at the lower end of the module inner shell 2. The normally open / normally closed contacts of the micro switch 9 are activated, and an alarm signal (such as a switching signal) is output through the circuit. At the same time, the position change of the indicator 7 is displayed through the trip indicator window of the module outer shell 1, which makes it easy for users to intuitively judge whether the module has failed.

[0047] 4. Structural protection mechanism: After tripping, the spring structure of the large plug 5 and the small plug 4 remains mechanically fixed to ensure that the module will not fall off the PCB board. At the same time, the electrical circuit is disconnected to prevent the fault from escalating further.

[0048] In some practical applications, the synergistic effects of core technological features are as follows;

[0049] Connection between pressure-sensitive chip 3 and trip piece 6: Low-temperature solder serves as both an electrical connection medium and a temperature-sensitive triggering element, enabling automatic tripping in case of overheating.

[0050] Mechanical transmission between tension spring 8 and indicator 7: The normal connection is maintained by mechanical tension, and power is provided when the trip is triggered to push the trip plate 6 to move. At the same time, the status is visualized through indicator 7.

[0051] The alarm logic of micro switch 9: The mechanical movement of trip piece 6 directly triggers the electrical alarm signal, forming a complete protection chain of "overcurrent-overheat-trip-alarm".

[0052] In some practical applications, the implementation logic of the technical effect is as follows;

[0053] Miniaturization and high current compatibility: The modular structure design effectively reduces the product size, while the layout design of the varistor chip 3 enables it to meet the requirements of rated discharge current of 20 kA and maximum discharge current of 40 kA to 30 kA and maximum discharge current of 60 kA.

[0054] Dual alarm mechanism: The electrical signal alarm of micro switch 9 is combined with the visual alarm of the trip indicator window, which solves the problem of the single alarm method in the existing technology.

[0055] Automatic trip protection: The linkage design of low-temperature solder and tension spring 8 ensures rapid disconnection in case of varistor chip 3 failure, avoiding short circuit risk and meeting the safety requirements of low-voltage AC system and DC photovoltaic system.

[0056] In the description of this utility model, it should be understood that the terms "upper," "lower," "left," and "right," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or a specific orientational structure and operation. Therefore, they should not be construed as limitations on this utility model. Furthermore, "first" and "second" are only for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "multiple" means two or more.

[0057] It should be noted that all standard parts used in this utility model can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art, which will not be described in detail here.

[0058] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0059] The above description provides a detailed account of one embodiment of the present invention. However, this description is merely a preferred embodiment and should not be construed as limiting the scope of the present invention. All equivalent variations and improvements made within the scope of the claims of the present invention should still fall within the patent coverage of the present invention.

Claims

1. An onboard surge protector with remote signaling alarm function for PCB soldering, characterized in that, include: Module outer shell (1) and module inner shell (2); A pressure-sensitive chip (3) is installed in the two pin holes of the inner shell (2) of the module; The large plug (5) and the small plug (4) are respectively located on the right and left sides of the inner shell (2) of the module. The large plug (5) is connected to the trip piece (6) by a copper braided strip, and the small plug (4) is connected to one pin of the pressure-sensitive chip (3) by solder. The trip piece (6) is installed on the positioning post at the upper end of the inner shell (2) of the module and is connected to another pin of the pressure-sensitive chip (3) by low-temperature soldering; The indicator (7) and the tension spring (8) are connected. One end of the tension spring (8) is hooked into the round hole at the end of the indicator (7), and the other end is hooked into the round hole at the end of the large plug (5). The other end of the indicator (7) is inserted into the positioning post at the lower end of the inner shell (2) of the module. The micro switch (9) is installed at the lower end of the inner shell (2) of the module. When the trip piece (6) trips, it contacts the end of the trip piece (6) and sends an alarm signal.

2. The onboard surge protector with remote signaling alarm function for PCB soldering according to claim 1, characterized in that: The large plug (5) and the small plug (4) are elastic structures used for the installation, fixing and soldering of the PCB board.

3. The onboard surge protector with remote signaling alarm function for PCB soldering according to claim 1, characterized in that: The tension spring (8) applies tension to the indicator (7) when the pressure-sensitive chip (3) is working normally. When the pressure-sensitive chip (3) heats up, the indicator (7) pushes the trip piece (6) to move in an arc around the positioning post, thereby disconnecting from the pin of the pressure-sensitive chip (3).

4. The onboard surge protector with remote signaling alarm function for PCB soldering according to claim 1, characterized in that: The micro switch (9) has normally open and normally closed contacts, and a tripping indicator window is provided above the module to identify whether the module has failed.

5. A board-mounted surge protector with remote signaling alarm function for PCB soldering according to claim 1, characterized in that: The surge protector has a lightning protection capability of rated discharge current of 20 kA and maximum discharge current of 40 kA to rated discharge current of 30 kA and maximum discharge current of 60 kA, and is suitable for PCB board mounting in low-voltage AC systems or DC photovoltaic systems.

6. The onboard surge protector with remote signaling alarm function for PCB soldering according to claim 1, characterized in that: The trip piece (6) is connected to the pressure-sensitive chip (3) by low-temperature solder. When the pressure-sensitive chip (3) overheats, the low-temperature solder melts and triggers the trip protection.

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