Surge protector

Abstract

The utility model relates to the field of circuit break protectors, in particular to a surge protector. Comprising a housing which comprises a line pin and a grounding pin; the surge protection assembly is arranged in the shell and is welded with the grounding pin through low-melting-point metal; the tripping assembly is arranged in the shell and comprises a circuit breaking component which is arranged in the shell in a sliding mode, a spring is arranged between one end of the circuit breaking component and the shell, and the other end of the circuit breaking component abuts against the metal welding position; the indicating part is hinged in the shell, one side of one end of the indicating part is opposite to the circuit breaking component, the other end of the indicating part is provided with an indicator, and a window is arranged on the shell; when the metal welding fails, the circuit breaking component is inserted between the surge protection assembly and the grounding pin, and the indicating component is pushed to enable the indicator to move at the position of the window; according to the utility model, the indicating component and the circuit breaking component are arranged in a split manner, the installation volume is reduced, the installation is convenient, and components can be replaced independently.

Description

Technical Field

[0001] The utility model relates to the field of circuit breakers, in particular to a surge protector. Background Art

[0002] A surge protective device (SPD), also called a lightning arrester, is an electronic device that provides safety protection for various electronic devices, instruments, and communication lines. When a spike current or voltage suddenly occurs in an electrical circuit or communication line due to external interference, the surge protector can conduct and divert the current in an extremely short time, thereby avoiding damage to other devices in the circuit caused by the surge.

[0003] Most of the existing SPDs use a metal oxide varistor (MOV) with advantages such as fast response, low residual voltage, and strong impact resistance as the surge protection component. However, when the MOV element is working, it will generate heat, causing the working chamber where the varistor is located to generate heat. When the heat is too large, it may cause a fire. Especially when the MOV is impacted by an electrical surge and transient overvoltage, it will significantly deteriorate itself and is prone to combustion, resulting in the SPD catching fire and thus triggering dangers such as electrical fires.

[0004] To solve the above problems, a low-temperature solder joint tripping technology has been proposed, that is, a thermal tripping device based on the principle that low-temperature solder melts when encountering high temperature is installed at the varistor pin. And when the varistor generates heat, the temperature is transmitted to the low-temperature solder joint, and the solder melts, causing the tripping mechanism connected to the solder joint to act, thereby disconnecting the varistor circuit and making the line out of danger.

[0005] Currently, the circuit-breaking component and the indicating component of the surge protector are integrated, occupying a large space, and when a part is damaged, the whole needs to be replaced.

[0006] Therefore, there is an urgent need to provide an improved technical solution to solve the above technical problems. Summary of the Utility Model

[0007] The purpose of the utility model is to provide a technical effect of a surge protector in which the indicating component and the circuit-breaking component are separated for the above-mentioned existing technical problems.

[0008] In view of this, the utility model provides a surge protector, which is characterized by comprising:

[0009] A housing, the housing includes a line pin and a ground pin;

[0010] A surge protection component, the surge protection component is arranged in the housing and is welded to the ground pin through a low-melting-point metal;

[0011] The tripping component is arranged inside the housing and includes:

[0012] A circuit-breaking member which is slidably arranged inside the housing, and a spring is provided between one end of the circuit-breaking member and the housing, and the other end abuts against the metal welding position;

[0013] An indicating component which is hingedly arranged inside the housing, one side of one end of the indicating component faces the circuit-breaking member, the other end is provided with an indicating mark, and a window is provided on the housing;

[0014] When the metal welding fails, the circuit-breaking member is inserted between the surge protection component and the grounding pin, and pushes the indicating component to move the indicating mark at the window.

[0015] Furthermore, the housing includes an upper housing and a base. The surge protection component, the tripping component, the circuit-breaking member and the indicating component are all arranged on the base, and the upper housing is buckled on the base.

[0016] Furthermore, two windows are provided on the housing, and correspondingly two sets of surge protection components, tripping components, circuit-breaking members and indicating components are provided, and a partition plate connected to the base is provided between the two sets of surge protection components.

[0017] Furthermore, a hinge plate is provided on the base, the indicating component is hinged on the hinge plate, and a baffle is provided at the upper end of the hinge plate, and a clamping plate on one side of the baffle is provided at the upper end of the indicating component. When the circuit-breaking member pushes the lower end of the indicating component, the clamping plate moves from one side of the baffle to the other side.

[0018] Furthermore, the circuit-breaking member includes:

[0019] A sliding block, one end of the sliding block is provided with a mounting rod for installing a spring, the other end is provided with a blocking plate, and a push rod extending towards the indicating component is provided on the sliding block.

[0020] Furthermore, the grounding pin includes a connecting plate which is welded to the surge protection component, and a first inclined surface is provided at the end of the connecting plate, and a second inclined surface is provided on the circuit-breaking member, and the first inclined surface abuts against the second inclined surface.

[0021] Furthermore, the connection between the indicating component and the housing is a detachable clamping connection.

[0022] The beneficial effects of the present utility model are:

[0023] 1. The present utility model separates the indicating component and the circuit-breaking member, reduces the installation volume, and is convenient for installation, and the components can be replaced separately.

[0024] 2. The present utility model is provided with two sets of surge protection components, tripping components, circuit-breaking members and indicating components, so that this surge protector can include two different circuit systems.

[0025] 3. The cooperation of the baffle and the clamping plate in the present utility model is to prevent the indicating mark from returning to the normal position and prevent incorrect indication of the indicating mark. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is a three-dimensional structural schematic diagram of the present utility model;

[0027] Figure 2 is a structural schematic diagram of the position of the clamping plate of the present utility model;

[0028] Figure 3 is a three-dimensional structural schematic diagram of the present utility model in a left oblique view;

[0029] Figure 4 is a three-dimensional structural schematic diagram of the housing of the present utility model.

[0030] The marks in the figure are represented as:

[0031] 1. Housing; 101. Upper housing; 102. Base; 1021. Hinge plate; 1022. Hinge shaft; 2. Circuit pin; 3. Ground pin; 301. Connecting plate; 4. Open-circuit member; 401. Sliding block; 402. Mounting rod; 403. Blocking plate; 404. Push rod; 5. Metal welding; 6. Indication component; 601. Indication mark; 602. Card slot; 7. Window; 8. Baffle; 9. Clamping plate; 10. Second inclined surface; 11. Surge protection component. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0032] Next, the technical solutions in the embodiments of the present application will be clearly described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art belong to the scope of protection of the present application.

[0033] As mentioned above, a surge protector is a device used to protect electronic devices from sudden voltage surges or current surges in the power system. It is usually used to prevent damage to devices caused by overvoltage or current surges, such as lightning strikes, power grid failures, power switch operations, etc.

[0034] The surge protection component of a surge protector is the core component of the surge protector. It is usually in a non-conductive state when the voltage in the arranged circuit is within the normal range. Here, non-conductive can refer to the situation where only a very weak current can be conducted or no current is conducted. The surge protection component can quickly become conductive when the voltage in the circuit exceeds its rated value, guiding the energy of the overvoltage to the ground to protect the device from damage. The surge protection component can include a metal oxide varistor (MOV), a transient voltage suppressor (TVS), or a combination thereof, etc.

[0035] In the following, the concept of the present disclosure will be mainly described by taking the MOV type surge protector as an example. It should be understood that the embodiments using other types of surge protection components are similar and will not be separately elaborated hereinafter.

[0036] A surge protector generally includes a normal operating state, an overvoltage state, and a tripping state. In the normal operating state, the varistor is in a high-resistance state and does not affect the normal operation of the circuit where it is located. The resistance value will remain at a high level within the set voltage range. When the circuit suffers a sudden overvoltage, such as a lightning strike or a power system fault, the voltage rises sharply. When the line voltage exceeds the threshold voltage (also known as the rated voltage), the surge protector enters the overvoltage state. Once the voltage of the line exceeds the rated voltage of the varistor, the resistance begins to change.

[0037] In this process, the varistor diverts the overvoltage to the ground, preventing the overvoltage from continuing to be transmitted to the protected device. The overvoltage state generally lasts for a short time. Once the voltage drops below the set threshold, the resistance value of the varistor will rise again. It should be noted that the varistor type surge protector may gradually deteriorate after experiencing multiple overvoltage events, resulting in a decrease in its protection ability. Therefore, in order to be able to use an effective surge protector to protect the circuit, a low-temperature solder joint is usually set in the surge protector so that when the surge protection component deteriorates to a certain extent, the low-temperature solder joint can melt and cause the surge protector to trip, thereby prompting the user to replace it in time.

[0038] Embodiment 1:

[0039] This embodiment provides a surge protector, including:

[0040] A housing 1, the housing 1 includes a line pin 2 and a ground pin 3;

[0041] A surge protection component 11, the surge protection component 11 is arranged in the housing 1 and is welded to the ground pin 3 through a low-melting-point metal 5;

[0042] A tripping component, the tripping component is arranged in the housing 1 and includes:

[0043] The open - circuit member 4 is slidably arranged in the housing 1, and a spring (not shown) is provided between one end of the open - circuit member 4 and the housing 1, and the other end abuts against the metal welding 5 position;

[0044] The indicating member 6 is hingedly arranged in the housing 1, one side of one end of the indicating member 6 faces the open - circuit member 4, the other end is provided with an indicating mark 601, and a window 7 is provided on the housing 1;

[0045] When the metal welding 5 fails, the open - circuit member 4 is inserted between the surge protection component 11 and the grounding pin 3, and pushes the indicating member 6 to move the indicating mark 601 at the window 7.

[0046] The housing 1 includes an accommodation space, and circuit pins 2 and grounding pins 3 extending outward are provided at the bottom of the housing 1. The circuit pins 2 and the grounding pins 3 are respectively connected to the respective phases of the corresponding circuits. The surge protection component 11 is a publicly known technology, without limitation and without specific description. The joint of the surge protection component 11 is soldered to the grounding pin 3, and there is a certain gap between the joint of the surge protection component 11 and the grounding pin 3. The provided open - circuit member 4 is slidably arranged left - and - right on the base 102 of the housing 1. A sliding groove is provided on the base 102. The open - circuit member 4 is made of insulating material. The left end of the open - circuit member 4 abuts against the metal welding 5, and a compressed spring is provided between the right end of the open - circuit member 4 and the sliding groove wall. And a hinged portion for installing the indicating member 6 is provided on the housing 1, which can be arranged on the housing 1 or on the base 102 included in the housing 1. In this embodiment, the hinged portion is arranged on the upward - extending hinged plate 1021 of the base 102. The middle - lower position of the indicating member 6 is hinged on the hinged plate 1021, and an indicating mark 601 is provided on the upper - end face of the indicating member 6. The indicating mark 601 has a color. A window 7 is opened on the housing 1 opposite to the indicating mark 601. When the metal welding 5 fails, the open - circuit member 4 is inserted between the surge protection component 11 and the grounding pin 3, and the open - circuit member 4 pushes the indicating member 6 to move the indicating mark 601 at the window 7, so that the color of the indicating mark 601 in the window 7 changes, to remind the personnel that this surge protector has failed.

[0047] The above - mentioned structure separates the indicating member 6 and the open - circuit member 4, reduces the installation volume, and is convenient for installation. The components can be replaced separately; and the structural layout optimizes the installation structure, and can be adapted to install two lightning protection chips. The installation structures of the lightning protection chips and between the lightning protection chips and the surge protector are all prior arts, and the specific structures and installation methods will not be discussed further.

[0048] Embodiment 2:

[0049] This embodiment provides a surge protector. In addition to including the technical solutions of the above embodiments, it also has the following technical features.

[0050] The housing 1 includes an upper housing 101 and a base 102. The surge protection component 11, the tripping component, the circuit breaker member 4, and the indicating component 6 are all arranged on the base 102, and the upper housing 101 is buckled on the base 102.

[0051] The housing 1 includes an upper housing 101 and a base 102. The upper housing 101 is buckled on the base 102. The upper housing 101 and the base 102 are connected by a plurality of buckles, and the surge protection component 11, the tripping component, the circuit breaker member 4, and the indicating component 6 are all arranged on the base 102, making the structure convenient for installation, and the upper housing 101 has functions such as protection, dust prevention, and waterproofing.

[0052] Embodiment 3:

[0053] This embodiment provides a surge protector. In addition to including the technical solutions of the above embodiments, it also has the following technical features.

[0054] Two windows 7 are provided on the housing 1, and correspondingly, two sets of surge protection components 11, tripping components, circuit breaker members 4, and indicating components 6 are provided, and a partition plate connected to the base 102 is provided between the two sets of surge protection components 11.

[0055] Two sets of surge protection components 11, tripping components, circuit breaker members 4, and indicating components 6 are provided, so that this surge protector can include two different circuit systems.

[0056] Embodiment 4:

[0057] This embodiment provides a surge protector. In addition to including the technical solutions of the above embodiments, it also has the following technical features.

[0058] A hinge plate 1021 is provided on the base 102. The indicating component 6 is hinged on the hinge plate 1021, and a baffle 8 is provided at the upper end of the hinge plate 1021, and a clamping plate 9 on one side of the baffle 8 is provided at the upper end of the indicating component 6. When the circuit breaker member 4 pushes the lower end of the indicating component 6, the clamping plate 9 moves from one side of the baffle 8 to the other side.

[0059] The base 102 is provided with a hinge plate 1021. The hinge plate 1021 is arranged on the left side of the base 102 and extends upward. And a hinge shaft 1022 is provided on the left side of the hinge plate 1021. The indicating member 6 is hinged on the hinge shaft 1022. A baffle 8 is arranged at the upper end of the hinge plate 1021, and a clamping plate 9 is arranged on the left side of the baffle 8 at the upper end of the indicating member 6. When the metal welding 5 fails, the breaking member 4 pushes the lower end of the indicating member 6, and the clamping plate 9 moves from the left side to the right side of the baffle 8. The baffle 8 can generate a certain amount of deformation. The cooperation of the baffle 8 and the clamping plate 9 is set to prevent the indicating mark 601 from returning to the normal position and prevent the indicating mark 601 from giving a wrong indication.

[0060] Embodiment 5:

[0061] This embodiment provides a surge protector. In addition to including the technical solutions of the above embodiments, it also has the following technical features.

[0062] The breaking member 4 includes:

[0063] A sliding block 401. One end of the sliding block 401 is provided with a mounting rod 402 for installing a spring, the other end is provided with a blocking plate 403, and a pushing rod 404 extending towards the indicating member 6 is provided on the sliding block 401.

[0064] The mounting rod 402 is inserted into the spring, which can fix the spring on the sliding block 401, making the structure more stable. The provided blocking plate 403 is in a plate-like structure, which is more convenient to insert between the grounding pin 3 and the surge protection component 11. The provided pushing rod 404 can shorten the sliding distance of the sliding block 401 and push the indicating member 6 more efficiently.

[0065] Embodiment 6:

[0066] This embodiment provides a surge protector. In addition to including the technical solutions of the above embodiments, it also has the following technical features.

[0067] The grounding pin 3 includes a connecting plate 301. The connecting plate 301 is welded to the surge protection component 11, and a first inclined surface is provided at the end of the connecting plate 301. A second inclined surface is provided on the breaking member 4, and the first inclined surface abuts against the second inclined surface.

[0068] The cooperation and sliding of the provided first inclined surface and the second inclined surface can make the breaking member 4 more convenient to insert between the grounding pin 3 and the surge protection component 11, making the blocking quality higher.

[0069] Embodiment 7:

[0070] This embodiment provides a surge protector. In addition to including the technical solutions of the above embodiments, it also has the following technical features.

[0071] The connection between the indicating component 6 and the housing 1 is a detachable snap connection.

[0072] The housing 1 includes a hinge shaft 1022, and a circular clamping groove 602 is provided on the indicating component 6. The clamping groove 602 is snapped onto the hinge shaft 1022 to facilitate the disassembly of the indicating component 6.

[0073] The embodiments of the present application have been described above in conjunction with the accompanying drawings. Without conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application is not limited to the above specific embodiments. The above specific embodiments are merely illustrative and not restrictive. Under the inspiration of the present application, those of ordinary skill in the art can also make many forms without departing from the purpose of the present application and the scope protected by the claims, and all belong to the protection scope of the present application.

Claims

1. A surge protector, characterized in that: include: A housing (1), the housing (1) comprising a line pin (2) and a ground pin (3); A surge protection component (11), the surge protection component (11) is arranged in the housing (1) and is welded to the ground pin (3) via a low melting point metal (5); A trip assembly is arranged in a housing (1) and comprises: A circuit breaker component (4), the circuit breaker component (4) is slidably disposed in the housing (1), a spring is disposed between one end of the circuit breaker component (4) and the housing (1), and the other end abuts against a metal welding (5) position; An indicating component (6), the indicating component (6) is hingedly arranged in the housing (1), one side of one end of the indicating component (6) faces the circuit breaker component (4), the other end is provided with an indicating mark (601), and a window (7) is provided on the housing (1); When the metal weld (5) fails, the circuit breaker (4) is inserted between the surge protection assembly (11) and the ground pin (3), and pushes the indicating component (6) to move the indicating mark (601) to a position in the window (7).

2. A surge protector according to claim 1, characterized in that: The housing (1) comprises an upper housing (101) and a base (102); a surge protection assembly (11), a trip assembly, a circuit breaker component (4) and an indication component (6) are all arranged on the base (102), and the upper housing (101) is buckled on the base (102).

3. A surge protector according to claim 1, characterized in that: Two windows (7) are provided on the housing (1), and two groups of surge protection components (11), tripping components, circuit breaker components (4) and indicating components (6) are provided correspondingly, and a partition plate connected to the base (102) is provided between the two groups of surge protection components (11).

4. A surge protector according to claim 2, characterized in that: A hinged plate (1021) is provided on the base (102), the indicating component (6) is hinged on the hinged plate (1021), a baffle (8) is provided at the upper end of the hinged plate (1021), and a clamping plate (9) is provided at the upper end of the indicating component (6) on one side of the baffle (8), and when the circuit breaker component (4) pushes the lower end of the indicating component (6), the clamping plate (9) moves from one side of the baffle (8) to the other side.

5. A surge protector according to claim 1, characterized in that: The circuit breaker component (4) comprises: A sliding block (401) is provided with a mounting rod (402) for mounting a spring at one end of the sliding block (401) and a blocking plate (403) at the other end. A pushing rod (404) extending toward the indicating component (6) is provided on the sliding block (401).

6. A surge protector according to claim 1 or 5, characterized in that: The ground pin (3) comprises a connecting plate (301), the connecting plate (301) is welded to the surge protection assembly (11), and a first inclined surface is provided at the end of the connecting plate (301), a second inclined surface is provided on the disconnecting member (4), and the first inclined surface and the second inclined surface are in conflict.

7. A surge protector according to claim 1, characterized in that: The connection between the indicating component (6) and the housing (1) is a detachable snap connection.

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