Combined resettable fuse
By designing a modular self-resetting fuse, the problem of fuses being unable to be combined and installed in existing technologies is solved, enabling rapid assembly, stable connection, and efficient heat dissipation, thereby improving the stability and safety of the circuit.
Patent Information
- Application Number
- CN202423267348.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-30
- Publication Date
- 2026-01-30
- Estimated Expiration
- 2034-12-30
AI Technical Summary
Existing resettable fuses have a simple structure and cannot be combined and installed according to usage requirements, resulting in reduced practicality.
A modular self-resetting fuse has been designed, comprising components such as a fuse body, a connecting shell, an extension shell, a limiting protrusion, a limiting block, and a locking block. These components enable rapid assembly and stable connection of the fuse, thereby enhancing heat dissipation performance.
It enables rapid assembly and stable connection of fuses, improves practicality and reliability, enhances heat dissipation performance, and ensures stable operation and safety of the circuit.
Smart Images
Figure CN223858124U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to self -restoring fuse technical field especially relates to a combined self -restoring fuse. BACKGROUND
[0002] Self -restoring fuse is by polymer matrix and conductive particle constitute's overcurrent protection element, normal resistance is low guarantee circuit power on, overload or short circuit when because heat causes resistance rise limit current, after trouble shooting can restore. Using combined self -restoring fuse is of great significance, in performance promotion, can improve protection precision, according to the different area demand accurate protection of circuit, still can enhance the heat dissipation performance, optimize the heat dissipation structure, avoid heat accumulation, in reliability, redundancy design can reduce the risk of failure, part fuse failure does not influence overall protection, from applicability, can satisfy the complex circuit multiple overcurrent protection requirement, flexible configuration to guarantee various circuit system safe and stable operation, escort for the stable work of electronic equipment and industrial control system.
[0003] The existing self -restoring fuse is mostly designed in one piece, but due to the simple structure of the traditional fuse, it lacks a structure that can connect multiple fuses, which leads to the problem of not being able to add multiple fuses for unified connection and installation according to the use requirements, therefore a combined self -restoring fuse is proposed to solve the above problems. UTILITY MODEL CONTENT
[0004] To make up for the above shortcomings, the utility model provides a combined self -restoring fuse, aiming at improving the simple structure and single function of the fuse in the prior art, thereby realizing combined installation according to the use requirements and reducing the practicality of the fuse.
[0005] To achieve the above purpose, the utility model provides the following technical scheme: a combined self -restoring fuse, comprising a fuse body, the fuse body is fixedly connected with a pin on the outer wall, the fuse body is provided with a connecting shell on the outer wall, the connecting shell is slidably connected with an extension shell on the outer wall, the extension shell is installed with a connecting assembly on the inner wall, a through hole is formed in the connecting shell, a limiting groove is formed in the connecting shell, and a fixing assembly is installed on the outer wall of the connecting shell.
[0006] Further, the connecting assembly comprises a limiting protrusion, the limiting protrusion is fixedly connected to the inner wall of the extension shell on one side of the outer wall, the limiting protrusion is slidably connected to the inner wall of the limiting groove, and a limiting assembly is installed on the other side of the inner wall of the extension shell.
[0007] Further, the limiting assembly comprises a limiting block, one side of the outer wall of the limiting block is fixedly connected to the other side of the inner wall of the extension shell, and the outer wall of the limiting block is slidably connected to the inner part of the connecting shell.
[0008] Further, the fixing assembly comprises a clamping block, one side of the outer wall of the clamping block is fixedly connected to the outer wall of the connecting shell, the inner part of the extension shell is provided with a positioning groove, and the outer wall of the clamping block is slidably connected to the inner wall of the positioning groove.
[0009] Further, the pin is arranged in the inner wall of the through hole, and the through hole is used for the pin to extend out of the inner part of the connecting shell for installation.
[0010] Further, the inner part of the connecting shell is provided with a heat dissipation opening, and the heat dissipation opening is used for efficient heat dissipation.
[0011] Further, the outer wall of the limiting block is slidably connected to the inner wall of the limiting sliding groove, and the limiting sliding groove is used for limiting the movement of the limiting block.
[0012] The utility model has the following beneficial effects:
[0013] 1、 the utility model discloses a fuse body is placed in the inner part of connecting shell, and then the elasticity of connecting shell is used to realize the effect that the fuse body is conveniently fixed, then another connecting shell is placed on one side of extension shell, the limiting block in the inner wall of limiting sliding groove is slid in the inner wall of limiting sliding groove, the extension shell is abutted on one side of pin, and the effect that the pin is further stably limited is realized, and the practicality of fuse is improved.
[0014] 2、 the utility model discloses when a single connecting shell is used, the limiting block in the inner wall of extension shell is slid in the inner wall of limiting sliding groove, the extension shell is abutted on one side of pin, the effect that the pin is further stably limited is realized, and the practicality of fuse is improved. DRAWINGS
[0015] Figure 1 A three-dimensional structure schematic view of a combined self-recovery fuse is provided for the utility model;
[0016] Figure 2 A split structure schematic view of a combined self-recovery fuse is provided for the utility model;
[0017] Figure 3 A connecting shell cross-sectional part structure schematic view of a combined self-recovery fuse is provided for the utility model.
[0018] LEGEND:
[0019] 1, fuse body; 2, pin; 3, connecting shell; 4, through hole; 5, limiting groove; 6, extension shell; 7, limiting block; 8, limiting block; 9, positioning groove; 10, clamping block; 11, limiting sliding groove; 12, heat dissipation port. DETAILED DESCRIPTION
[0020] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.
[0021] Referring to Figure 1 , Figure 2 and Figure 3 , the present application provides an embodiment: a combined self-recovery fuse, comprising a fuse body 1, the fuse body 1 is fixedly connected with a pin 2 on the outer wall, the fuse body 1 is provided with a connecting shell 3 on the outer wall, the connecting shell 3 is slidably connected with an extension shell 6 on the outer wall, the extension shell 6 is installed with a connecting assembly on the inner wall, the connecting shell 3 is provided with a through hole 4 penetrating through the inside, the connecting shell 3 is provided with a limiting groove 5 inside, and the connecting shell 3 is installed with a fixing assembly on the outer wall; the connecting assembly comprises a limiting block 7, one side of the limiting block 7 is fixedly connected with the inner wall of the extension shell 6, the limiting block 7 is slidably connected with the inner wall of the limiting groove 5, and the other side of the extension shell 6 is installed with a limiting assembly; the limiting assembly comprises a limiting block 8, one side of the limiting block 8 is fixedly connected with the other side of the inner wall of the extension shell 6, the limiting block 8 is slidably connected with the inside of the connecting shell 3, and the inside of the connecting shell 3 is provided with a limiting sliding groove 11; the fixing assembly comprises a clamping block 10, one side of the clamping block 10 is fixedly connected with the outer wall of the connecting shell 3, the extension shell 6 is provided with a positioning groove 9 inside, and the clamping block 10 is slidably connected with the inner wall of the positioning groove 9;
[0022] Specifically, the fuse body 1 is made of a material with positive temperature coefficient thermistor characteristics. When normal current passes through, its resistance value remains at a low level, ensuring that the circuit can work normally. When an overload or short circuit fault occurs in the circuit, the current increases instantaneously, and the fuse body 1 can quickly sense the current change and respond by rapidly increasing its resistance value to limit the current size, thereby effectively protecting other electronic components in the circuit from damage caused by excessive current. The pin 2 fixedly connected to the outer wall of the fuse body 1 is made of a metal material with excellent conductivity and oxidation resistance, such as copper alloy. This material not only ensures stable current conduction into and out of the fuse body 1 during long-term use, but also has a strong structural design that allows the pin 2 to withstand a certain degree of insertion and external force pulling, reducing the risk of circuit failure caused by pin 2 loosening or damage, and ensuring the reliability and stability of the circuit connection. The fuse body 1 is provided with a connecting shell 3 made of insulating plastic material with certain mechanical strength. Its main function is to provide physical protection for the internal fuse body 1, preventing external dust, moisture, and collision factors from damaging the fuse body 1, and also providing a basic framework for the installation and combination of other components. The connecting shell 3 is slidably connected to the outer wall of the extension shell 6, which is installed with a connecting assembly. The limiting protrusion 7 in the connecting assembly is fixedly connected to the inner wall of the extension shell 6 on one side, and is made of a wear-resistant and elastic material such as nylon. The limiting protrusion 7 is slidably connected to the inner wall of the limiting groove 5, which is precisely matched in size and position. This design allows the extension shell 6 to maintain a stable positional relationship when sliding relative to the connecting shell 3, facilitating the extension and contraction of the extension shell 6, and preventing the extension shell 6 from deviating or falling off during sliding, ensuring the integrity and stability of the entire device structure. The other side of the extension shell 6 is installed with a limiting assembly, which includes a limiting block 8 fixedly connected to the other side of the inner wall of the extension shell 6. The limiting block 8 is also made of a wear-resistant material, and its outer wall is slidably connected to the limiting sliding groove 11 inside the connecting shell 3. The limiting sliding groove 11 further limits the sliding trajectory of the limiting block 8, working together with the limiting protrusion 7 to accurately guide and limit the sliding of the extension shell 6 from multiple directions, ensuring that the extension shell 6 maintains a good cooperative relationship with the connecting shell 3 in different working states, effectively improving the reliability and durability of the entire device. The connecting shell 3 is provided with a through hole 4, which is carefully designed in size and position to provide an air passage without affecting the overall structural strength of the connecting shell 3. When the fuse body 1 generates heat during operation, the heat can be exchanged with the external air through the through hole 4, assisting the heat dissipation process and improving the heat dissipation efficiency, which helps to maintain the normal working temperature of the fuse body 1. The connecting shell 3 is installed with a fixing assembly, which includes a clamping block 10,The outer wall of the clamping block 10 is fixedly connected to the outer wall of the connecting shell 3. The clamping block 10 is made of plastic with certain elasticity and strength. The inner part of the extension shell 6 is provided with a positioning groove 9. The outer wall of the clamping block 10 is slidingly connected to the inner wall of the positioning groove 9. When the extension shell 6 is slid relative to the connecting shell 3 to a suitable position, the clamping block 10 can be clamped into the positioning groove 9, thereby firmly fixing the extension shell 6 on the connecting shell 3, preventing displacement of the extension shell 6 due to accidental circumstances during normal use, ensuring the stability of the entire combined self-restoring fuse structure, and facilitating operation of the user when the position of the extension shell 6 needs to be adjusted. Only by exerting appropriate external force to overcome the elastic resistance of the clamping block 10 can the sliding and fixing of the extension shell 6 be realized, which is simple and convenient to operate, improves the practicality and ease of use of the device,
[0023] With reference to Figure 1 , Figure 2 and Figure 3 , the pin 2 is arranged to penetrate the inner wall of the through hole 4, and the through hole 4 is used for the pin 2 to extend out of the inner part of the connecting shell 3 for installation; the inner part of the connecting shell 3 is provided with a heat dissipation opening 12 penetratingly arranged, and the heat dissipation opening 12 is used for efficient heat dissipation; the outer wall of the limiting block 8 is slidingly connected to the inner wall of the limiting sliding groove 11, and the limiting sliding groove 11 is used for limiting the movement of the limiting block 8;
[0024] Specifically, the pin 2 penetrates the inner wall of the through hole 4, the aperture size of the through hole 4 is accurately designed, the inner wall is smooth, which can effectively reduce the friction resistance of the pin 2 during penetration, prevent scratches or wear on the surface of the pin 2, and ensure that the conductivity of the pin 2 is not affected. The through hole 4 provides a stable and accurate channel for the pin 2 to extend out of the inside of the connecting shell 3, so that the pin 2 can be smoothly connected and installed with the external circuit, ensuring reliable access of the entire self-resetting fuse in the circuit, maintaining stable transmission of current, avoiding circuit failure caused by poor connection, and the inside of the connecting shell 3 is provided with a plurality of heat dissipation openings 12, the shape, number and distribution position of the heat dissipation openings 12 are optimized based on the heat conduction principle and aerodynamics principle, which creates an efficient way for heat dissipation. When the self-resetting fuse works and generates heat, the heat will form a hot air flow inside the connecting shell 3, the heat dissipation openings 12 can guide the hot air to be quickly discharged to the outside environment, while promoting the entry of cold air from the outside environment, forming good air circulation, greatly improving the heat dissipation efficiency, helping to reduce the working temperature of the self-resetting fuse, ensuring the stability and reliability of its performance, prolonging its service life, and enabling it to operate stably in a high-load or long-time working circuit environment, effectively preventing performance degradation or even damage of the fuse due to overheating. The outer wall of the limiting block 8 is slidingly connected to the inner wall of the limiting sliding groove 11, and the limiting sliding groove 11 has precise dimensions and a smooth inner wall. Its function is to accurately limit the movement of the limiting block 8. When the extension shell 6 slides relative to the connecting shell 3, the limiting block 8 slides along the limiting sliding groove 11. The limiting sliding groove 11 can strictly limit the movement direction and range of the limiting block 8, preventing the limiting block 8 from deviating from the predetermined trajectory, thereby ensuring that the relative movement between the extension shell 6 and the connecting shell 3 is smooth, accurate and reliable. This limiting design ensures the integrity and stability of the entire device structure, prevents damage to the fuse body 1 or other internal components due to improper movement of the extension shell 6, and also provides clear and stable tactile feedback for the user to operate the extension process of the extension shell 6, improving the ease of use and safety of the device.
[0025] Working principle: when the fuse is needed, first put the fuse body 1 into the connecting shell 3, and the connecting shell 3 made of elastic plastic clamps the outer side of the fuse body 1. Then place another set of connecting shells 3 side by side. Then pull the extension shell 6, which drives the limiting block 8 to slide in the limiting sliding groove 11 while the limiting protrusion 7 slides in the limiting groove 5. At this time, the clamping block 10 is clamped in the positioning groove 9 to realize the connection of multiple connecting shells 3, thereby achieving the effect of facilitating the combination of multiple fuse bodies 1 for use. At the same time, the heat dissipation openings 12 can quickly export and dissipate the heat generated by the fuse body 1.
[0026] Finally, it should be noted that: the above only for the preferred embodiments of the present application, and is not intended to limit the present application, although the foregoing embodiments of the present application has been described in detail, for the skilled in the art, it still can be modified, or for part of the technical features of the equivalent replacement, the spirit and principles of the present application, made any modification, equivalent replacement, improvement, etc., should be included within the scope of the present application.
Claims
1. A combination self-resetting fuse comprising a fuse body (1), characterized in that: The fuse body (1) is fixedly connected with a pin (2), the fuse body (1) is provided with a connecting shell (3), the connecting shell (3) is slidably connected with an extension shell (6), the extension shell (6) is internally mounted with a connecting assembly, the connecting shell (3) is internally provided with a through hole (4), the connecting shell (3) is internally provided with a limiting groove (5), and the connecting shell (3) is externally mounted with a fixing assembly.
2. A combination self-resetting fuse according to claim 1, wherein: The connecting assembly comprises a limiting lug (7), one side of the limiting lug (7) is fixedly connected to the inner wall of the extension shell (6), the limiting lug (7) is slidably connected to the inner wall of the limiting groove (5), and the other side of the limiting lug (7) is mounted with a limiting assembly.
3. A combination self-resetting fuse according to claim 2, wherein: The limiting assembly comprises a limiting block (8), one side of the limiting block (8) is fixedly connected to the other side of the inner wall of the extension shell (6), and the limiting block (8) is slidably connected to the inside of the connecting shell (3).
4. The combination self-resetting fuse of claim 1, wherein: The fixing assembly comprises a clamping block (10), one side of the clamping block (10) is fixedly connected to the outer wall of the connecting shell (3), the extension shell (6) is internally provided with a positioning groove (9), and the clamping block (10) is slidably connected to the inner wall of the positioning groove (9).
5. The combination self-resetting fuse of claim 1, wherein: The pin (2) is provided in the inner wall of the through hole (4), and the through hole (4) is used for the pin (2) to extend out of the inside of the connecting shell (3) for installation.
6. The combination self-resetting fuse of claim 1, wherein: The inside of the connecting shell (3) is provided with a heat dissipation opening (12), and the heat dissipation opening (12) is used for efficient heat dissipation.
7. A combination self-resetting fuse according to claim 3, wherein: The limiting block (8) is slidably connected to the inner wall of the limiting sliding groove (11), and the limiting sliding groove (11) is used for limiting the movement of the limiting block (8).