A new power supply overload protection device
By designing deformation and limiting components in power supply overload protection equipment, the fatigue problem caused by frequent bending deformation of bimetallic strips was solved, thereby improving the reliability and stability of overload protection and ensuring circuit safety.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- 魏娜
- Filing Date
- 2025-04-16
- Publication Date
- 2026-06-19
AI Technical Summary
In existing power supply overload protection equipment, bimetallic strips often become fatigued due to frequent bending and deformation after prolonged use, which may prevent them from responding to overload currents in a timely manner, posing a safety hazard.
The protection mechanism adopted in the housing includes a first circuit breaker, a second circuit breaker, a limiting element, and a deformation element. The deformation element consists of two bimetallic strips, and deformation at either end can break the circuit. Combined with the limiting element, it prevents malfunction and ensures the reliability and stability of overload protection.
It improves the reliability and stability of overload protection devices, prevents individual bimetallic strips from failing to respond to overload currents in a timely manner due to fatigue, reduces malfunctions, and ensures circuit safety and equipment stability.
Smart Images
Figure CN224384192U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of power supply and distribution technology, and more specifically, to a novel power supply and distribution overload protection device. Background Technology
[0002] Power supply overload protection devices are key components ensuring the safe operation of power systems. They monitor circuit current in real time and react quickly once the current exceeds the rated value, indicating an overload. Widely used in factories, homes, and other electrical scenarios, they effectively prevent electrical faults and fire hazards caused by overloads, thus building a strong defense for the stability of power supply systems and the safety of equipment and personnel.
[0003] Currently, power supply overload protection devices mainly use bimetallic strips for overload protection. When the current in the circuit is too large, the front end of the bimetallic strip will bend due to heat, triggering the protection. However, frequent bending and deformation of the bimetallic strip during long-term use can lead to fatigue, which may make it difficult to react to overload current in a timely manner, thus creating potential hazards in the overload protection device. In view of this, we propose a new type of power supply overload protection device. Utility Model Content
[0004] The purpose of this utility model is to overcome the shortcomings of the existing technology, adapt to the needs of reality, and provide a new type of power supply overload protection device to solve the technical problem that the frequent bending deformation of bimetallic strips during long-term use will cause fatigue, which may make it inconvenient to respond to overload current in a timely manner.
[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a novel power supply overload protection device, comprising a housing mechanism and a protection mechanism disposed within the housing mechanism. The housing mechanism includes a mounting box and a top cover disposed on the mounting box. A first contact block and a second contact block are disposed within the mounting box. A conductive rod is disposed at the front end of the first contact block. A conductive sheet is disposed on one side of the first contact block within the mounting box. The protection mechanism includes a first circuit breaker, a second circuit breaker, and a limiting member. The first circuit breaker and the second circuit breaker are symmetrically and rotatably mounted within the mounting box. An adjusting member is symmetrically and rotatably mounted on one side of the first circuit breaker and the second circuit breaker within the mounting box. The adjusting member is Z-shaped. A deformation member is inserted into the upper end of the limiting member.
[0006] Preferably, the first and second power connectors are provided with insertion holes on their side ends. A first wire and a second wire extending out of the mounting box are respectively provided in the insertion holes. The upper ends of the first and second power connectors are provided with threaded holes communicating with the insertion holes. Screws are installed in the threaded holes, and the ends of the screws press against the first and second wires.
[0007] Preferably, the lower ends of the first circuit breaker, the second circuit breaker, and the adjusting member are all provided with torsion springs, and the torsion springs are located on the outside of the rotating parts of the first circuit breaker, the second circuit breaker, and the adjusting member.
[0008] Preferably, both the first circuit breaker and the second circuit breaker include a mounting portion and a force-bearing portion and an insulating portion disposed on the mounting portion. The angle between the force-bearing portion and the insulating portion is 140 degrees. A conductive portion is disposed at the end of the insulating portion. A first conductive wire connected to a conductive sheet is disposed on the conductive portion of the first circuit breaker. The conductive portion of the first circuit breaker is in contact with a conductive rod. The conductive portion of the second circuit breaker is in contact with a conductive sheet.
[0009] Preferably, the upper end of the limiting member has a limiting groove, the deformable member is located in the limiting groove, both the limiting member and the deformable member are bent along the long axis, the limiting member and the deformable member are V-shaped, the deformable member is composed of two bimetallic strips connected together, one end of the two adjusting members is in contact with the deformable member, and the other end of the two adjusting members is in contact with the first circuit breaker and the second circuit breaker respectively.
[0010] Preferably, the conductive part of the second circuit breaker is provided with a second conductive wire connected to one end of the deformable member, and the second contact block is provided with a third conductive wire connected to the other end of the deformable member.
[0011] Compared with the prior art, the beneficial effects of this utility model are:
[0012] 1. This utility model designs a deformable element, a first circuit breaker, and a second circuit breaker. The deformable element consists of two bimetallic strips, with its two ends used to control the first and second circuit breakers to break the circuit, respectively. This allows the deformation of either end of the deformable element to break the circuit. Even if one bimetallic strip experiences performance degradation due to prolonged use, the other can still function, preventing a single bimetallic strip from failing to respond to overload current in a timely manner. This further improves the reliability of overload protection and solves the problem that frequent bending deformation of bimetallic strips during prolonged use can lead to fatigue, potentially hindering timely responses to overload current.
[0013] 2. This utility model also designs a limiting component structure. The V-shaped limiting component can not only be installed to fit the shape of the deformable component, but also limit the deformable component to prevent it from pushing the adjusting component and causing unnecessary circuit breakage due to external factors such as vibration. This ensures the stability of the overload protection equipment during normal operation and avoids malfunctions. Attached Figure Description
[0014] Figure 1 This is a cross-sectional structural diagram of the present invention;
[0015] Figure 2 This is a front view structural diagram of the present utility model;
[0016] Figure 3 This is a schematic diagram of one usage state of the present invention;
[0017] Figure 4 This is a schematic diagram of the circuit breaker structure of this utility model;
[0018] Figure 5 This is a schematic diagram of the box mechanism of this utility model.
[0019] Explanation of the numbers in the diagram: 100, Box body mechanism; 101, Mounting box; 102, Top cover; 103, First contact block; 1031, First wire; 1032, Conductive rod; 104, Second contact block; 1041, Second wire; 105, Conductive sheet; 200, Protection mechanism; 201, First circuit breaker; 202, First conductive wire; 203, Second circuit breaker; 204, Second conductive wire; 205, Limiting component; 206, Deformation component; 207, Adjusting component; 208, Third conductive wire; 301, Mounting part; 302, Torsion spring; 303, Force-bearing part; 304, Insulating part; 305, Conductive part. Detailed Implementation
[0020] like Figures 1 to 5 As shown, this utility model relates to a novel power supply overload protection device, including a housing mechanism 100 and a protection mechanism 200 disposed within the housing mechanism 100. The housing mechanism 100 includes a mounting box 101 and a top cover 102 disposed on the mounting box 101. A first contact block 103 and a second contact block 104 are disposed within the mounting box 101. A conductive rod 1032 is disposed at the front end of the first contact block 103. A conductive sheet 105 is disposed on one side of the first contact block 103 within the mounting box 101. The protection mechanism 200 includes a first circuit breaker 201, a second circuit breaker 203, and a limiting member 205. The first circuit breaker 201 and the second circuit breaker 203 are symmetrically and rotatably mounted within the mounting box 101. An adjusting member 207 is symmetrically and rotatably mounted on one side of the first circuit breaker 201 and the second circuit breaker 203 within the mounting box 101. The adjusting member 207 is Z-shaped. A deformable member 206 is inserted into the upper end of the limiting member 205. This utility model features a special bimetallic strip and two circuit-breaking structures, which allows for circuit breaking whenever either end of the deformable component 206 deforms. Even if one of the bimetallic strips experiences performance degradation due to prolonged use, the other can still function, preventing a single bimetallic strip from failing to respond to overload current in a timely manner and improving the reliability of overload protection.
[0021] Specifically, both the first connector 103 and the second connector 104 have insertion holes on their sides. A first wire 1031 and a second wire 1041, extending from the mounting box 101, are respectively installed in these insertion holes. The upper ends of both connectors have threaded holes communicating with the insertion holes, and screws are installed in these threaded holes, with the ends of the screws pressing against the first wire 1031 and the second wire 1041. The first connector 103 and the second connector 104 are used to connect external wires, and the first wire 1031 and the second wire 1041 are used to connect the power supply circuit and the electrical equipment.
[0022] Furthermore, torsion springs 302 are provided at the lower ends of the first circuit breaker 201, the second circuit breaker 203, and the adjusting member 207. The torsion springs 302 are located on the outer side of the rotating parts of the first circuit breaker 201, the second circuit breaker 203, and the adjusting member 207. When the circuit is normal, the torsion springs 302 can maintain the position of the components and ensure that the circuit is conductive.
[0023] It is worth noting that both the first circuit breaker 201 and the second circuit breaker 203 include a mounting portion 301 and a force-bearing portion 303 and an insulating portion 304 disposed on the mounting portion 301. The angle between the force-bearing portion 303 and the insulating portion 304 is 140 degrees. A conductive portion 305 is disposed at the end of the insulating portion 304. A first conductive wire 202 connected to the conductive sheet 105 is disposed on the conductive portion 305 of the first circuit breaker 201. The conductive portion 305 of the first circuit breaker 201 is in contact with the conductive rod 1032. The conductive portion 305 of the second circuit breaker 203 is in contact with the conductive sheet 105. The insulating portion 304 effectively isolates the conductive part from other components, preventing safety hazards such as leakage and short circuit, and improving the safety and stability of the device. The conductive portion 305 disposed at the end of the insulating portion 304 can accurately realize the conductive function, ensuring the normal conduction and disconnection control of the circuit.
[0024] It is worth noting that the upper end of the limiting member 205 has a limiting groove, and the deformable member 206 is located in the limiting groove. Both the limiting member 205 and the deformable member 206 are bent along their long axis, and their shapes are V-shaped. The deformable member 206 is composed of two bimetallic strips connected together. One end of the two adjusting members 207 contacts the deformable member 206, and the other end of the two adjusting members 207 contacts the first circuit breaker 201 and the second circuit breaker 203, respectively. The deformable member 206 is composed of two bimetallic strips, and its two ends are used to control the first circuit breaker 201 and the second circuit breaker 203 to break the circuit, so that the circuit can be broken by deformation at either end of the deformable member 206. Even if one bimetallic strip degrades due to long-term use, the other can still function, preventing the single bimetallic strip from failing to respond to the overload current in time and ensuring the reliability of the overload protection.
[0025] It is worth noting that the conductive part 305 of the second circuit breaker 203 is provided with a second conductive wire 204 connected to one end of the deformable member 206, and the second contact block 104 is provided with a third conductive wire 208 connected to the other end of the deformable member 206. The provision of the second conductive wire 204 allows current from the conductive part 305 of the second circuit breaker 203 to enter the deformable member 206, and the provision of the third conductive wire 208 allows current from the deformable member 206 to enter the second contact block 104.
[0026] Working Principle: This embodiment provides a novel power supply overload protection device. During use, current flows through the first contact block 103, conductive rod 1032, conductive part 305 of the first circuit breaker 201, first conductive wire 202, conductive sheet 105, conductive part 305 of the second circuit breaker 203, second conductive wire 204, deformation element 206, and third conductive wire 208, ultimately reaching the second contact block 104, forming a complete conductive path. When the circuit is working normally, the heat generated by the current is insufficient to deform the deformation element 206. At this time, under the action of the torsion spring 302, the first circuit breaker 201 and the second circuit breaker 203 maintain their current positions, ensuring circuit continuity. Once an overload occurs, the current increases, and the generated heat causes the temperature of the deformation element 206 (composed of two bimetallic strips connected together) to rise. Due to the different thermal expansion coefficients of the bimetallic strips, bending deformation occurs when the temperature rises. The deformation element 206 bends upward, pushing the two adjusting parts 207 in contact with it to rotate. After rotation, the first circuit breaker 201 and the second circuit breaker 203 are pushed to rotate around their mounting portion 301. With rotation, the conductive part 305 of the first circuit breaker 201 separates from the conductive rod 1032, and the conductive part 305 of the second circuit breaker 203 separates from the conductive sheet 105, thereby cutting off the circuit and achieving overload protection. The deformation member 206 composed of two bimetallic sheets can break the circuit by deforming either end, preventing a single bimetallic sheet from failing to respond promptly to overload current after prolonged use, effectively improving... The reliability of the overload protection device is ensured by the following: when the overload is removed, the circuit temperature decreases, the deformable component 206 returns to its original state, and under the action of the torsion spring 302, the first circuit breaker 201, the second circuit breaker 203, and the adjusting component 207 also return to their initial positions, the circuit is reconnected, and the device continues to work normally. During use, the V-shaped limiting component 205 can limit the deformable component 206 to prevent vibration from causing the deformable component 206 to push the adjusting component 207 to break the circuit, thus ensuring the stability of the overload protection device.
[0027] The embodiments disclosed herein are preferred embodiments, but are not limited thereto. Those skilled in the art can readily grasp the spirit of this utility model based on the above embodiments and make different extensions and variations. However, as long as they do not depart from the spirit of this utility model, they are all within the protection scope of this utility model.
Claims
1. A novel power supply overload protection device, characterized by, The device includes a housing mechanism (100) and a protective mechanism (200) disposed within the housing mechanism (100). The housing mechanism (100) includes a mounting box (101) and a top cover (102) disposed on the mounting box (101). A first contact block (103) and a second contact block (104) are disposed within the mounting box (101). A conductive rod (1032) is disposed at the front end of the first contact block (103). A conductive sheet (104) is disposed on one side of the first contact block (103) within the mounting box (101). 5) The protection mechanism (200) includes a first circuit breaker (201), a second circuit breaker (203), and a limiting member (205). The first circuit breaker (201) and the second circuit breaker (203) are symmetrically and rotatably installed in the mounting box (101). An adjusting member (207) is symmetrically and rotatably installed in the mounting box (101) on one side of the first circuit breaker (201) and the second circuit breaker (203). The adjusting member (207) is Z-shaped. A deformable member (206) is inserted into the upper end of the limiting member (205).
2. A new power supply overload protection device according to claim 1, characterized in that, The first power connector (103) and the second power connector (104) are provided with insertion holes on their sides. The insertion holes are respectively provided with a first wire (1031) and a second wire (1041) extending out of the mounting box (101). The upper ends of the first power connector (103) and the second power connector (104) are provided with threaded holes communicating with the insertion holes. Screws are installed in the threaded holes, and the ends of the screws press against the first wire (1031) and the second wire (1041).
3. A new power supply overload protection device according to claim 2, characterized in that, The lower ends of the first circuit breaker (201), the second circuit breaker (203), and the adjusting member (207) are all provided with torsion springs (302), and the torsion springs (302) are located on the outside of the rotating parts of the first circuit breaker (201), the second circuit breaker (203), and the adjusting member (207).
4. A new power supply overload protection device according to claim 3, characterized in that, The first circuit breaker (201) and the second circuit breaker (203) both include a mounting part (301) and a force-bearing part (303) and an insulating part (304) provided on the mounting part (301). The angle between the force-bearing part (303) and the insulating part (304) is 140 degrees. A conductive part (305) is provided at the end of the insulating part (304). A first conductive wire (202) connected to a conductive sheet (105) is provided on the conductive part (305) of the first circuit breaker (201). The conductive part (305) of the first circuit breaker (201) is in contact with the conductive rod (1032). The conductive part (305) of the second circuit breaker (203) is in contact with the conductive sheet (105).
5. A new power supply overload protection device according to claim 4, characterized in that, The upper end of the limiting member (205) is provided with a limiting groove, and the deformable member (206) is located in the limiting groove. Both the limiting member (205) and the deformable member (206) are bent along the long axis. The limiting member (205) and the deformable member (206) are V-shaped. The deformable member (206) is composed of two bimetallic strips connected together. One end of the two adjusting members (207) is in contact with the deformable member (206), and the other end of the two adjusting members (207) is in contact with the first circuit breaker (201) and the second circuit breaker (203) respectively.
6. A new power supply overload protection device according to claim 5, characterized in that, The conductive part (305) of the second circuit breaker (203) is provided with a second conductive wire (204) connected to one end of the deformable member (206), and the second contact block (104) is provided with a third conductive wire (208) connected to the other end of the deformable member (206).