A thermal trip structure and a surge protector using the same

Abstract

The present invention discloses a thermal trip structure and surge protector thereof. Upon receiving an abnormal temperature rise signal, the structure promptly activates a circuit-breaking protection circuit. The structure comprises a power element and a conductor. The conductor is a conductor structure comprising an input terminal and an output terminal. The power element, disposed within the conductor, causes the conductor to have a tendency to move out of the circuit. At least one of the input terminal and the output terminal of the conductor is connected to an external conductor via a low-melting-point conductive material. Upon melting due to heat, the low-melting-point conductive material loses its restraint on the conductor. By embedding the power element within the conductor, the structure is not only compact and easy to install, but also can act directly on the conductor, resulting in high stability.

Description

Technical Field

[0001] The invention belongs to the technical field of lightning protection equipment, and particularly relates to a thermal trip structure and a surge protector using the same. Background Art

[0002] A surge protector, also known as a lightning arrester, is an electronic device that provides safety protection for various electronic devices, instruments, and communication lines. In low-voltage power distribution systems, when external interference suddenly generates a spike in current or voltage in an electrical circuit or communication line, such as an overvoltage caused by lightning, the surge protector can quickly conduct and divert the current, thus preventing the surge from damaging other equipment in the circuit.

[0003] Surge protectors typically incorporate a trip mechanism to prevent overheating and fire in internal components. A trip mechanism is a crucial component of the operating system that automatically trips switches or other electrical components. Common trip mechanisms are typically found within circuit breakers. During the closing process and in the closed position, the trip mechanism acts as a fulcrum. When the circuit breaker automatically trips, the trip mechanism, controlled by the trip device, releases this fulcrum, allowing the circuit breaker to enter a free-open state.

[0004] Thermal trip structures are often used in surge protectors. These structures collect temperature change signals from functional components within the surge protector. When an abnormal temperature rise occurs, this heat transfer causes specific components within the thermal trip structure to rise in temperature simultaneously, resulting in a physical change. This in turn causes the components that were originally intended to trip to trip. Existing thermal trip structures must be fitted closely to the functional components, but in order to achieve a good tripping effect, they require a large size or range of motion. Furthermore, since they rely on an external, independent power source to provide the tripping force, they are not suitable for smaller installation spaces. Summary of the Invention

[0005] In order to solve the problems existing in the prior art, the present invention provides a thermal trip structure and a surge protector using the same.

[0006] The technical solution adopted in the present invention is:

[0007] A thermal tripping structure, which promptly trips the circuit breaker upon receiving an abnormal temperature rise signal, comprises a power body and a conductor. The conductor is a conductor structure comprising an input end and an output end. The power body disposed inside the conductor causes the conductor to have a tendency to move out of the circuit.

[0008] At least one of the input end and the output end of the conductor is connected to an external conductor through a low-melting-point conductive material, and the low-melting-point conductive material loses its restriction on the conductor after being melted by heat.

[0009] Thermal trip mechanisms are a common operating element in circuit protection devices. These devices include types that only provide power to the operating mechanism, as well as types that also function as a conductive element. These devices are commonly installed in various electrical devices to prevent overheating and fire in their functional components.

[0010] The main causes of heat and fire in electrical equipment are faults such as leakage current, overload, overvoltage surge, etc. in the circuit, which causes the excessive conversion of electrical energy into heat energy in other functional components such as current limiting and voltage limiting. After a certain period of time, the fault persists, and the temperature continues to rise, causing the equipment itself or external structures to catch fire.

[0011] In order to prevent abnormal heating and fire of internal functional components, the most effective way is to cut off the circuit. However, since the corresponding functional components cannot cut off the power supply through their own actions, they need to be protected by multiple external protective devices.

[0012] The protective equipment primarily consists of a signal receiving structure and an action mechanism. Upon receiving an abnormal signal, the action mechanism disconnects the corresponding functional component from the circuit. The so-called signal is the fault signal, which includes parameters such as current, voltage, temperature, and magnetic field that can change with the occurrence of a fault. By summarizing the signal variation patterns of different faults, a judgment can be made using existing patterns or deep learning models. A fault is determined when the characteristic value matches the fault threshold.

[0013] Most of these technologies utilize complex circuit control equipment for data analysis and are often used in medium- to large-scale electrical equipment. However, many small, low-voltage electrical devices lack the capability to install active circuit breakers. To reduce costs and improve reliability, passive tripping mechanisms are used.

[0014] The signal receiving structure in the passive protection structure is mostly connected to the circuit using an electromagnetic coil structure. Once a fault current occurs in the circuit, the current passes through the electromagnetic coil, causing the armature inside it to move, and the armature pushes the component to shift and break the circuit.

[0015] The fault current that causes the fire may not generate enough force in the electromagnetic coil to disconnect the circuit breaker, and the functional components will continue to heat up. A thermal trip structure is used to receive the thermal signal and automatically disconnect the circuit breaker when the temperature rises to the threshold.

[0016] To achieve instant disconnection, existing thermal trip structures are typically placed close to functional components, allowing the thermal signal to quickly reach the receiving structure. A thermal signal is a change in the receiving structure's temperature caused by heat conduction through a medium. Temperature changes can cause physical changes in specific materials, such as the low-melting-point conductive material used in this invention. This structure is first bonded to the external conductor. When the temperature rises to its melting point, the structure melts and detaches, causing the side that was initially detaching to return to its original position, thus achieving the desired tripping effect.

[0017] Since it needs to be fitted onto functional components, but at the same time in order to have a better breaking effect, its volume or range of motion is large, and the separation tendency is provided by an independent external power body, it cannot be applied to a smaller installation space.

[0018] By embedding the power body inside the conductor, the present invention is not only small in size and easy to install, but also can directly act on the conductor and has high stability.

[0019] Furthermore, the power body and the conductor are both connected to the same fixed structure, the conductor is rotatably connected to the fixed structure, and the power body is movably connected to the fixed structure and can move in a straight line;

[0020] The movement direction of the power body is perpendicular to the rotation axis of the conductor, and one end of the power body is in contact with the end of the conductor away from the rotation axis, and the spatial angle between the contact end surface and the movement direction of the power body is an acute angle.

[0021] The power element is a structure installed within a conductor to perform its actions. Because the power element can always provide a certain amount of power when the conductor is in a normal state, it always remains connected or attached to the conductor. The power element provides motive force through its internal structure. If a force is needed to propel the conductor, the end away from the conductor is fixed to another structure, thereby propelling the conductor relative to the structure.

[0022] Conductors have more modes of movement, with rotation resulting in less displacement. Since conductors have input and output terminals, each connected to an external conductor, forming a series circuit, if the conductor moves, the optimal solution is to weld either the input or output terminal to the external conductor with a low-melting-point material, while connecting the other terminal with a flexible material or a structure that can simultaneously move and maintain electrical connection.

[0023] In this solution, since the conductor is pivotally connected to a fixed structure and the pivoting connection is provided with a rotation axis, the portion closest to the axis of rotation experiences the least displacement during movement. This portion is then connected to the external conductor using a soft conductive material. The portion farther from the axis of rotation experiences the greatest displacement, and this portion is welded to the external conductor using a low-melting-point conductive material. This solution ensures a stable tripping effect, with a larger distance between the two ends of the conductor connected by the low-melting-point conductive material after outward rotation, and less displacement at the other end. This ensures that the required soft material is used, while ensuring no resistance to the conductor's movement, resulting in lower costs.

[0024] It is worth noting that in order to achieve efficient tripping in a small space, the power element needs to maintain a relatively stable thrust within a certain displacement range. This is achieved by using a built-in compressed elastic material as the motive force and setting the appropriate length to minimize the attenuation of the elastic force during movement.

[0025] However, since the conductor is designed to rotate, the contact surface between the linearly moving power element and the conductor must be an inclined surface to achieve effective transmission. Compared to the prior art, since the power element is housed within the conductor and configured for linear motion, the inclined surface structure ensures that the thrust component applied to the conductor is more uniform within the power element's displacement range. Furthermore, by setting an appropriate angle, the thrust component is sufficient to prevent false tripping during disconnection. If the angle is greater than 90 degrees, even if the low-melting-point conductive material on one side of the conductor melts, the power element will not be able to move.

[0026] Furthermore, the conductor is covered on the power body, and a avoidance groove is provided on the power body for any external conductor to pass through, and the low-melting-point conductive material covers the surface of the conductor around the external conductor and the avoidance groove;

[0027] When the low-melting-point conductive material melts, the power body moves to cause the external conductor passing through the avoidance groove to move to a position not covered by the conductive body to achieve tripping.

[0028] Furthermore, the conductor is a rotatable structure, and the power body is a torsion spring structure arranged on the rotating installation position of the conductor, and the power body continuously applies a torsional force to the conductor in the tripping direction.

[0029] Furthermore, the power body includes a main body and a spring arranged in the main body. When the conductor is fixed to the external conductor through the low-melting-point conductive material, the spring is compressed between the main body and the fixed structure.

[0030] Furthermore, the conductor is a bent metal sheet structure, and a through slot for placing the power body is provided on the conductor. The end of the through slot away from the rotating shaft is an inclined surface that fits with the power body for transmission.

[0031] Furthermore, it also includes a feedback component, wherein the feedback component has a built-in power source;

[0032] The feedback component has a motion tendency through the power source and is connected to the power body for limiting;

[0033] When the power body moves, the feedback component moves synchronously and feeds back the failure information of the thermal trip structure to the outside through the change of the external mark.

[0034] Furthermore, the feedback assembly includes a rotatable feedback body and a helical torsion spring disposed within the feedback body;

[0035] The feedback body is provided with a soft connection structure connected with the power body.

[0036] Furthermore, the soft connection structure is a connection belt, one end of which is provided with an enlarged end, which is clamped and limited by a clamping groove provided on the feedback body and partially wrapped around the outside of the feedback body;

[0037] A pulling hole is provided on the side away from the expanded end. One end of the power body extends out of the conductor and a pulling hook is provided at the end thereof to match the pulling hole.

[0038] A surge protector is provided with the above-mentioned thermal trip structure inside, including a shell as a fixed structure, a varistor is provided in the shell, the input end of the varistor is connected to the external circuit, the output end of the varistor is connected to the input end of the conductor by low-temperature soldering, and the output end of the conductor is connected to the external circuit.

[0039] The beneficial effects of the present invention are:

[0040] (1) The present invention uses a spring with a certain length to compress and form a power reserve. However, the inclined surface structure design enables the originally large elastic force to be reduced in the form of inclined surface force component. In addition, the present invention can be arranged inside the conductor and push it to rotate outward, thereby achieving a better breaking effect.

[0041] (2) The present invention uses a spring with a certain compression or extension length to provide thrust to the power body. In order to ensure a good breaking effect, the spring thrust needs to change less when the power body is in motion. Therefore, the spring thrust is relatively large in the initial stage. Through the fit of the inclined surface and the wedge surface, the spring thrust does not directly act on the conductor to rotate it. Instead, it reduces the thrust through a component force at a certain angle, while satisfying the direction of rotation of the conductor. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 1 is a schematic diagram of the structure of one side of the surge protector in Example 5 and Example 6 of the present invention, wherein the thermal trip structure is arranged on the side of the varistor;

[0043] Figure 2 This invention Figure 1 Axonometric diagram from another angle;

[0044] Figure 3 Schematic diagram of the thermal trip structure with a varistor in Examples 5 and 6 of the present invention, which also shows a linked feedback body;

[0045] Figure 4 This invention Figure 3 Another angle of the display;

[0046] Figure 5 This invention Figure 4 A schematic diagram of the enlarged part of the middle part A;

[0047] Figure 6 This is the display diagram A of the present invention in which the conductor and the power body are separated separately;

[0048] Figure 7 In the present invention Figure 6 The other side angle display diagram;

[0049] Figure 8 This is a structural diagram showing a single power body in the present invention;

[0050] Figure 9 This is a schematic structural diagram of the state in which the power body pushes the conductor to rotate outward in the present invention;

[0051] Figure 10 It is a structural diagram of one side of the SCB module in Example 6 of the present invention.

[0052] In the figure: 1-power body, 2-conductor, 3-feedback body, 4-helical torsion spring, 5-connecting belt, 6-clamping groove, 7-pull hole, 8-pull hook, 9-housing, 10-varistor. DETAILED DESCRIPTION

[0053] The present invention will be further explained below with reference to the accompanying drawings and specific embodiments.

[0054] To make the objectives, technical solutions, and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Generally, the components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0055] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for protection, but merely represents selected embodiments of the present application. All other embodiments obtained by persons of ordinary skill in the art based on the embodiments in the present application without making any creative efforts shall fall within the scope of protection of the present application.

[0056] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0057] In the description of this application, it should be noted that if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the accompanying drawings, or the orientation or position relationship in which the product of the application is usually placed when in use. It is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, it cannot be understood as a limitation on this application. In addition, if the terms "first", "second", etc. appear in the description of this application, they are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0058] Furthermore, the use of terms such as "horizontal" and "vertical" in the description of this application does not necessarily imply that a component must be absolutely horizontal or suspended, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical" and does not mean that the structure must be completely horizontal, but rather that it can be slightly tilted.

[0059] It should also be noted that, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood broadly. For example, they may refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. A person of ordinary skill in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0060] Example 1:

[0061] A thermal trip structure includes a power body 1 and a conductor 2. The conductor 2 is a conductor structure including an input end and an output end. The power body 1 is arranged inside the conductor 2, so that the conductor 2 has a movement tendency to disconnect from the circuit; at least one of the input end and the output end of the conductor 2 is connected to an external conductor through a low-melting-point conductive material. After the low-melting-point conductive material is melted by heat, it loses its restriction on the conductor 2.

[0062] To achieve instant disconnection, existing thermal trip structures are typically placed close to functional components, allowing the thermal signal to quickly reach the receiving structure. A thermal signal is a change in the receiving structure's temperature caused by heat conduction through a medium. Temperature changes can cause physical changes in specific materials, such as the low-melting-point conductive material used in this invention. First, conductor 2 is bonded to the external conductor. When the temperature rises to its melting point, the structure melts and detaches, causing the side of the structure that was initially detaching to return to its original position, thus achieving the tripping effect.

[0063] Specifically, the power body 1 and the conductor 2 in this embodiment are both connected to the same fixed structure, the conductor 2 is rotatably connected to the fixed structure, and the power body 1 is movably connected to the fixed structure and can move in a straight line; the movement direction of the power body 1 is perpendicular to the rotation axis of the conductor 2, and one end of the power body 1 is in contact with the end of the conductor 2 away from the rotation axis, and the spatial angle between the contact end surface and the movement direction of the power body 1 is an acute angle.

[0064] Power element 1 is a structure installed within conductor 2 and operates within it. Since power element 1 can always provide a certain amount of power to conductor 2 in its normal state, it always remains connected or in contact with conductor 2. Power element 1 provides motive force through its internal structure. If a force is needed to propel conductor 2, its end away from contact with conductor 2 is fixed to another structure, thereby propelling conductor 2 relative to that structure.

[0065] Conductor 2 has more modes of movement, with rotational movement resulting in less displacement. Since conductor 2 has an input and output terminal, each connected to an external conductor, forming a series circuit, if conductor 2 moves, the optimal solution is to weld either the input or output terminal to the external conductor with a low-melting-point material, while the other terminal is connected with a flexible material or a structure capable of simultaneous displacement while maintaining electrical connection.

[0066] In this solution, since conductor 2 is pivotally connected to a fixed structure and the pivoting connection is provided with a rotation axis, the portion closest to the axis of rotation experiences the least displacement during movement. This portion is then connected to the external conductor using a soft conductive material. Displacement is greatest at the end farther from the axis of rotation, where it is welded to the external conductor using a low-melting-point conductive material. This solution ensures a stable tripping effect, with a larger distance between the two ends connected by the low-melting-point conductive material after the conductor 2 rotates outward, and less displacement at the other end. This ensures that less soft material is used, while ensuring no resistance to the movement of the conductor 2, resulting in lower costs.

[0067] It is worth noting that in order to achieve an efficient tripping effect in a small space, it is necessary to make the power body 1 maintain a relatively stable thrust within a certain displacement range. By using a built-in compressed elastic material as the motive force and setting an appropriate length, the elastic force of the power body 1 is less attenuated during movement.

[0068] However, since the conductor 2 is designed to rotate, the contact surface between the linearly moving power element 1 and the conductor 2 must be an inclined surface to achieve effective transmission. Compared to the prior art, since the power element 1 is housed within the conductor 2 and configured for linear motion, the inclined surface structure ensures that the thrust component applied to the conductor 2 is relatively uniform within the displacement range of the power element 1. Furthermore, by setting an appropriate angle, the thrust component is sufficient to prevent false tripping during disconnection. If the angle is greater than 90 degrees, even if the low-melting-point conductive material on one side of the conductor 2 melts, the power element 1 will not be able to move.

[0069] Example 2:

[0070] This embodiment also discloses a thermal trip structure, specifically including a power body 1 and a conductor 2. The conductor 2 is a conductor structure including an input end and an output end. The power body 1 is arranged inside the conductor 2, so that the conductor 2 has a movement tendency to disconnect from the circuit; one end of the input end of the conductor 2 is connected to the external conductor through a low-melting-point conductive material. After the low-melting-point conductive material is melted by heat, it loses its restraint on the conductor 2.

[0071] The power body 1 and the conductor 2 are both connected to the same fixed structure, the conductor 2 is rotatably connected to the fixed structure, and the power body 1 is movably connected to the fixed structure and can move in a straight line; the movement direction of the power body 1 is perpendicular to the rotation axis of the conductor 2, and one end of the power body 1 is in contact with the end of the conductor 2 away from the rotation axis, and the spatial angle between the contact end surface and the movement direction of the power body 1 is an acute angle.

[0072] The conductor 2 is covered on the power body 1, and a avoidance groove is provided on the power body 1 for any external conductor to pass through, and the low-melting-point conductive material covers the surface of the conductor 2 around the external conductor and the avoidance groove;

[0073] When the low-melting-point conductive material melts, the power body 1 moves to cause the external conductor passing through the avoidance groove to move to a position not covered by the conductor 2 to achieve tripping.

[0074] Example 3:

[0075] This embodiment is optimized and limited based on the above-mentioned embodiment 1. The conductor 2 is a rotatable structure, and the power body 1 is a torsion spring structure arranged on the rotating mounting position of the conductor 2. The power body 1 continuously applies a torsional force to the conductor 2 in the tripping direction.

[0076] The power body 1 includes a main body and a spring arranged in the main body. When the conductor 2 is fixed to the external conductor through the low-melting-point conductive material, the spring is compressed between the main body and the fixed structure.

[0077] The conductor 2 is a bent metal sheet structure, and a through slot is provided on the conductor 2 for placing the power body 1. The end of the through slot away from the rotating shaft is an inclined surface that fits with the power body 1 for transmission.

[0078] The thermal trip structure in this embodiment further includes a feedback component, which has a built-in power source. The feedback component has a movement tendency through the power source and is connected to the power body 1 for a limit position. When the power body 1 moves, the feedback component moves synchronously and feeds back the failure information of the thermal trip structure to the outside through the change of an external mark.

[0079] The feedback assembly includes a rotatable feedback body 3 and a helical torsion spring 4 arranged in the feedback body 3; the feedback body 3 is provided with a soft connection structure connected to the power body 1.

[0080] The soft connection structure is a connecting belt 5, one end of which is provided with an enlarged end, which is clamped and limited by the clamping groove 6 provided on the feedback body 3 and partially wrapped around the outside of the feedback body 3;

[0081] A pulling hole 7 is provided on the side away from the expanded end. One end of the power body 1 extends out of the conductor 2 and a pulling hook 8 is provided at its end to cooperate with the pulling hole 7.

[0082] Example 4:

[0083] This embodiment discloses a surge protector having a thermal trip structure inside, including a shell 9 as a fixed structure, a varistor 10 is provided in the shell 9, the input end of the varistor 10 is connected to the external circuit, the output end of the varistor 10 is connected to the input end of the conductor 2 by low-temperature soldering, and the output end of the conductor 2 is connected to the external circuit.

[0084] The thermal tripping structure includes a conductor 2 electrically connected to the output end of the varistor 10 via a low melting point material, and a power body 1 is provided inside the conductor 2 to continuously provide a driving force for the conductor 2 to move toward the tripping direction.

[0085] The thermal tripping structure uses a linear sliding action mode for tripping. The power body 1 includes a main body of a strip structure, which is slidably connected to the housing 9 through a connecting rod.

[0086] A spring is sleeved onto the connecting rod, creating a gap between the main body and the base frame when the spring is reset. A conductor 2 is mounted at the end of the main body. This conductor 2 is a sheet metal structure bolted to the end of the insulating material. One side of the conductor 2 is securely connected to the lead-out angle of the varistor 10 via low-temperature soldering. A soft, bent metal wire is also attached to the conductor 2, connecting it to the surge protector's output terminal.

[0087] When the conductor 2 is fixedly connected to the lead-out angle of the varistor 10, the main body of the power body 1 is compressed to fit with the chassis. At this time, the spring is compressed and always gives the main body an elastic force to disconnect, but is in a stable state due to the limitation of the low-temperature soldering.

[0088] When the varistor 10 is abnormally overheated, the temperature is transferred to the low-temperature solder connection and melts it. The conductor 2 loses connection with the varistor 10, and the power body 1 pushes the conductor 2 to move outward, causing a short circuit in the entire surge protector, thereby achieving the effect of protecting the connected circuit.

[0089] Example 5:

[0090] This embodiment discloses a surge protector, such as Figure 1-9 As shown, a thermal trip structure is provided inside, including a shell 9 as a fixed structure, a varistor 10 is provided in the shell 9, the input end of the varistor 10 is connected to the external circuit, the output end of the varistor 10 is connected to the input end of the conductor 2 by low-temperature soldering, and the output end of the conductor 2 is connected to the external circuit.

[0091] The thermal tripping structure includes a conductor 2 electrically connected to the output end of the varistor 10 via a low melting point material, and a power body 1 is provided inside the conductor 2 to continuously provide a driving force for the conductor 2 to move toward the tripping direction.

[0092] The conductor 2 is a rotatable structure, and the power element 1 is a torsion spring structure mounted on the rotating mounting position of the conductor 2. The power element 1 continuously applies a torsional force to the conductor 2 in the tripping direction. The power element 1 comprises a main body and a spring disposed within the main body. When the conductor 2 is fixed to an external conductor via a low-melting-point conductive material, the spring is compressed between the main body and the fixed structure.

[0093] The conductor 2 is a bent metal sheet structure, and a through slot is provided on the conductor 2 for placing the power body 1. The end of the through slot away from the rotating shaft is an inclined surface that fits with the power body 1 for transmission.

[0094] The thermal trip mechanism in this embodiment also includes a feedback assembly with a built-in power source. This feedback assembly, driven by the power source, is capable of motion and is connected to the power element 1 for position limiting. When the power element 1 operates, the feedback assembly synchronizes with the operation and provides feedback of thermal trip mechanism failure information via changes in an external indicator. The feedback assembly includes a rotatable feedback element 3 and a helical torsion spring 4 disposed within the feedback element 3. The feedback element 3 is provided with a flexible connection structure that connects to the power element 1.

[0095] The soft connection structure is a connecting belt 5, one end of which is provided with an enlarged end, which is clamped and limited by the clamping groove 6 provided on the feedback body 3 and partially wrapped around the outside of the feedback body 3; a pulling hole 7 is provided on the side away from the enlarged end, and one end of the power body 1 extends out of the outside of the conductor 2 and is provided with a pulling hook 8 at its end that cooperates with the pulling hole 7.

[0096] Example 6:

[0097] This embodiment discloses a highly integrated circuit protection device, such as Figure 1-10 The figure shows a plug-in module that integrates an SPD module and an SCB module. The plug-in structure consists of two plug-in parts: a base and a plug-in box. The base is a concave-shaped structure with terminal blocks on both sides for connecting to the circuit. The central groove has two metal pin sockets and multiple jacks for accommodating anti-reverse insertion structures.

[0098] The plug-in box is a rectangular structure with two metal feet and two anti-reverse plugs at the bottom. By inserting the plug-in box into the groove of the base, a complete circuit protection device is formed. The detachable structural design facilitates the replacement of consumable parts and improves usability.

[0099] The plug-in box primarily consists of a housing 9 and a mounting bracket. One side of the housing 9 is open for easy insertion of the mounting bracket. A base plate seals the opening of the housing 9. The mounting bracket divides the internal space of the box into two chambers, one housing the SCB module and the other housing the SPD module. The two metal pins on the box are designated as input and output terminals. The input terminal extends into the box and connects to the SCB module, while the output terminal extends into the box and connects to the SPD module, connecting the SCB and SPD modules in series to form a complete circuit.

[0100] The SCB module on one side consists of a gas discharge tube, an electromagnetic release, a switch assembly, a handle, and a control circuit board. The inner wall of the mounting bracket on this side features a cylindrical mounting area for the gas discharge tube and a rectangular mounting area for the electromagnetic release. The gas discharge tube is cylindrical in shape, with metal electrode discs on both circular sides. In the diagram, one metal electrode disc is positioned inward, electrically connected to the metal pin at the access port. This inner disc is also connected to the electromagnetic coil of the electromagnetic release via a wire.

[0101] The metal electrode disk outside the air release tube is also connected to the other end of the electromagnetic coil through a wire, so that the air release tube and the electromagnetic coil are connected in parallel. A static contact (4.5) is also provided on the outer metal electrode disk, which is connected to the switch assembly in a closed state.

[0102] The switch assembly includes an active rod, a push rod, and a connecting rod. The active rod is provided with a strip-shaped through-hole, and a rotating shaft is provided on the inner wall of the fixed frame, which penetrates the strip-shaped through-hole. The active rod can not only rotate around the rotating shaft, but also slide along the extension direction of the strip-shaped through-hole with the rotating shaft as the fixed point, thereby achieving the effect of position adjustment to change between the locked state and the unlocked state. Since the switch assembly is divided into locked and unlocked states during operation, when it contacts and connects with the static contact, the component locks to form a limit, so that the connection can be maintained in a stable state without the influence of external forces. If the locked state is destroyed by external forces, it will be pulled to one side by the rebound structure provided inside.

[0103] The upper end of the active rod is connected to the connecting rod, and the other end of the connecting rod is connected to the handle. The movement of the active rod is controlled by rotating the handle. At the same time, the electromagnetic release is activated when a continuous power frequency current appears in the access line, causing the internal movable armature to move outward and push the push rod to rotate. The push rod pushes the active rod to move in the disconnecting direction.

[0104] The active rod has a sheet metal movable contact at the end away from the upper connecting rod. The side mounting bracket has multiple through-holes, including one near the active rod for the SPD access terminal. A soft metal conductor connects the movable contact to the SPD module access terminal in series.

[0105] The SPD module is a varistor 10. The side bracket has a dedicated mounting location for the varistor 10. This location is a thin, annular raised structure with multiple movable buckles for clamping the varistor 10. Metal rings are located on the larger surfaces of both sides of the varistor 10 for connecting to external circuits.

[0106] The inner metal ring has an input terminal that passes through the mounting bracket and connects to the moving contact, while the outer metal ring has an output terminal that passes through the thin-walled structure of the mounting base. The mounting bracket on this side also houses the thermal release mechanism and the feedback assembly. The feedback assembly is a rotatable cylindrical structure with an internal torsion spring for rebound force. It is located at the top, near the viewing window on the housing 9.

[0107] The thermal trip structure includes a conductor 2 and a power body 1, wherein one end of the power body 1 is hinged to the fixed frame, and the other end is connected to the feedback component via a ribbon connector. The conductor 2 is fixedly connected to the outlet end of the metal ring by low-temperature soldering. Once the varistor 10 heats up abnormally, causing the low-temperature solder to partially melt, the power body 1 is pushed upward by the internal spring, pushing the conductor 2 and the varistor 10 apart. At the same time, the tension limiting the feedback component is lost, and the feedback component rotates. The color change of the feedback component can be seen in the external window, indicating that the internal thermal trip structure has been activated and needs to be replaced in time.

[0108] The bottom of the thermal trip structure is connected to the metal pin of the output terminal through a soft conductor 2, thus forming a complete circuit for the entire device.

[0109] Unlike existing switch components, by simplifying the components, the space occupancy rate can be reduced as much as possible while retaining its stable tripping function, and the operational stability can be improved and the manufacturing cost can be reduced by reducing the number of components.

[0110] The active rod is a rod structure with a certain length. A strip-shaped through hole is provided in the middle to facilitate the rotation effect of the rotating shaft of the fixed frame to pass through. A displacement hole is also opened in the middle position. A first tension spring is connected to the displacement hole to provide a release recovery force.

[0111] The present invention is not limited to the above optional embodiments. Anyone can derive various other forms of products based on the teachings of the present invention. The above specific embodiments should not be construed as limiting the scope of protection of the present invention. The scope of protection of the present invention shall be based on the scope defined in the claims, and the description can be used to interpret the claims.

Claims

1. A thermal tripping structure that promptly activates a circuit breaker protection circuit upon receiving an abnormal temperature rise signal, comprising a power body (1) and a conductor (2), characterized in that: The conductor (2) is a conductor structure including an input end and an output end, and the power body (1) arranged inside the conductor (2) enables the conductor (2) to have a movement tendency to leave the circuit; At least one of the input end and the output end of the conductor (2) is connected to an external conductor via a low-melting-point conductive material, and the low-melting-point conductive material loses its restriction on the conductor (2) after being melted by heat; Also included is a feedback component, wherein the feedback component has a built-in power source; The feedback component has a motion tendency through the power source and is connected to the power body (1) for limiting; When the power body (1) is in motion, the feedback component is in synchronous motion and provides external feedback of thermal trip structure failure information through changes in an external marker; The feedback assembly comprises a rotatable feedback body (3) and a helical torsion spring (4) arranged in the feedback body (3); The feedback body (3) is provided with a soft connection structure connected to the power body (1); The soft connection structure is a connection belt (5), one end of which is provided with an enlarged end, which is clamped and limited by a clamping groove (6) provided on the feedback body (3) and partially wrapped around the outside of the feedback body (3); A pulling hole (7) is provided on the side away from the expanded end, one end of the power body (1) extends outside the conductor (2) and a pulling hook (8) is provided at the end thereof to cooperate with the pulling hole (7); The heat causes the low-temperature solder to partially melt, and the power body (1) is pushed upward by the internal spring, pushing the conductor (2) and the varistor (10) apart. At the same time, the tension limiting the feedback component is lost, and the feedback component rotates. The color change of the feedback component is observed in the external window, confirming that the internal thermal release structure has been activated; The power body (1) and the conductor (2) are both connected to the same fixed structure, the conductor (2) is rotatably connected to the fixed structure, and the power body (1) is movably connected to the fixed structure and can move in a straight line; The movement direction of the power body (1) is perpendicular to the rotation axis of the conductor (2), and one end of the power body (1) is in contact with the end of the conductor (2) away from the rotation axis, and the spatial angle between the contact end surface and the movement direction of the power body (1) is an acute angle.

2. A thermal trip structure according to claim 1, characterized in that: The conductor (2) is covered on the power body (1), a avoidance groove is provided on the power body (1) for any external conductor to pass through, and the low-melting-point conductive material covers the surface of the conductor (2) around the external conductor and the avoidance groove; When the low-melting-point conductive material melts, the power body (1) moves to cause the external conductor passing through the avoidance groove to move to a position not covered by the conductive body (2) to achieve tripping.

3. A thermal trip structure according to claim 2, characterized in that: The power body (1) comprises a main body and a spring arranged in the main body, and when the conductor (2) is fixed to an external conductor via a low-melting-point conductive material, the spring is compressed between the main body and the fixed structure.

4. A thermal trip structure according to claim 2, characterized in that: The conductor (2) is a bent metal sheet structure, and a through slot for placing the power body (1) is provided on the conductor (2). At one end of the through slot away from the rotating shaft is an inclined surface for the conductor (2) and the power body (1) to fit together for transmission.

5. A surge protector, characterized in that: The thermal trip structure as claimed in claim 1 is provided inside, including a shell (9) as a fixed structure, a varistor (10) is provided in the shell (9), the input end of the varistor (10) is connected to the external circuit, the output end of the varistor (10) is connected to the input end of the conductor (2) by low-temperature soldering, and the output end of the conductor (2) is connected to the external circuit.

Images