A fuse

Abstract

The utility model discloses a fuse belongs to fuse technical field, including fuse tube main part and outer hat, and the outer hat is sleeved in the fuse tube main part end, and the outer hat lateral wall is equipped with a plurality of ring around distribution's through -hole, and the outward bending elastic arm is formed in each through -hole, is used for when with external protection terminal plug -in, realizes contact connection with protection terminal inner wall. Meanwhile, the fuse includes two kinds of use state, and the first kind is that the outer hat is sleeved in one end of fuse tube main part, and the other end is equipped with round needle connecting piece, and the second kind is that the outer hat is sleeved in both ends of fuse tube main part. The fuse provided by the utility model can carry out quick plug -in connection with protection terminal and round needle connecting piece, reduces maintenance difficulty and improves maintenance efficiency, and compared with traditional fuse, adopts elastic connection to replace rigid connection, and the conductivity and safety reliability are all improved.

Description

Technical Field

[0001] This utility model relates to the field of fuse technology, and in particular to a fuse. Background Technology

[0002] High-voltage fuses are critical protective components in power systems. Traditional fuse caps (outer caps) are typically rigid structures, connected to internal components via welding, bolting, or crimping of terminals. This structure has significant drawbacks: First, under long-term operation or in environments with mechanical vibration, rigid connections are prone to stress concentration, leading to increased contact resistance and even loosening of the connection, affecting conductivity and reliability, and posing a risk of overheating. Second, installation and replacement require specialized tools, making the process cumbersome, time-consuming, and inefficient, especially in confined spaces like distribution cabinets. Finally, when a fuse blows, replacement can cause prolonged power outages, disrupting power supply continuity. Summary of the Invention

[0003] The purpose of this utility model is to overcome the shortcomings of the existing technology and provide a fuse that solves the technical problems of insufficient conductivity and safety reliability of existing fuses under long-term operation or mechanical vibration environment, as well as the time-consuming and laborious replacement operation, which affects the continuity of power supply.

[0004] To achieve the above objectives, this utility model employs the following technical solution: This utility model provides a fuse, comprising: The fuse tube body; An outer cap is fitted onto the end of the fuse tube body. The outer cap has multiple through holes arranged around its sidewall. Each through hole has an outwardly bent spring arm, which is used to make contact with the inner wall of the protection terminal when it is plugged into the external protection terminal.

[0005] Optionally, the outer cap is fitted onto both ends of the fuse tube body.

[0006] Optionally, the outer cap is fitted onto one end of the fuse tube body, and a round needle connector is fitted onto the other end. The round needle connector includes an integrally formed cap body and a round needle body. The cap body is fitted onto the end of the fuse tube body, and the round needle body is used to connect an external crimping sleeve.

[0007] Optionally, an insulating cap is provided at the outer end of the circular needle portion.

[0008] Optionally, the insulating cap includes an integrally formed cap portion and a connecting portion. The connecting portion has an annular cylindrical structure and is embedded in the circular needle portion until the cap portion is attached to the outer end of the circular needle portion.

[0009] Optionally, the outer wall of the connecting part is provided with an annular protrusion, and the inner wall of the circular needle part is provided with an annular groove that mates with the annular protrusion.

[0010] Optionally, a gap groove is provided on the outer wall of the connecting part, and the gap groove extends from the outer end to the inner end of the connecting part.

[0011] Optionally, the fuse tube body includes a tube body, inner caps fitted at both ends of the tube body, and a fusible element disposed inside the tube body. The two ends of the fusible element are connected to the two inner caps, and the outer cap is fitted onto the inner caps.

[0012] Compared with the prior art, the beneficial effects achieved by this utility model are as follows: This utility model provides a fuse that achieves an elastic connection between the outer cap and the protective terminal by incorporating a spring arm. Compared to the rigid connection of the end cap (outer cap) in traditional fuses, this avoids stress concentration during long-term or vibration-prone use, ensuring conductivity and reliability. It also includes two usage states: the first is with the outer cap on one end of the fuse tube and a round needle connector on the other; the second is with the outer cap on both ends of the fuse tube, allowing for quick plugging and unplugging connections with the protective terminal and the round needle connector. This reduces maintenance difficulty, improves maintenance efficiency, shortens system downtime, and ensures power supply stability. Attached Figure Description

[0013] Figure 1 This is an exploded view of the structure of the fuse provided in this embodiment of the utility model; Figure 2 This is a diagram showing the first usage state of the fuse provided in this embodiment of the utility model; Figure 3 This is a schematic diagram of the structure of the circular needle connector provided in this embodiment of the utility model; Figure 4 This is a schematic diagram of the structure of the insulating cap provided in this embodiment of the utility model; Figure 5 This is a diagram showing the second usage state of the fuse provided in this embodiment of the utility model; The diagram is marked as follows: 1. Main body of the fuse tube; 11. Tube body; 12. Inner cap; 13. Fusible element; 2. Outer cap; 21. Spring arm; 3. Round needle connector; 31. Cap body; 32. Round needle part; 33. Annular groove; 4. Insulating cap; 41. Cap cover; 42. Connecting part; 43. Annular protrusion; 44. Gap groove; 5. Protection terminals; 6. Wire clamping sleeve. Detailed Implementation

[0014] The present invention will be further described below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and should not be used to limit the scope of protection of the present invention.

[0015] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0016] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0017] Example 1

[0018] like Figure 1 As shown, this embodiment of the utility model provides a fuse, including a fuse tube body 1 and an outer cap 2. The fuse tube body 1 includes a tube 11, inner caps 12 sleeved at both ends of the tube 11, and a fusible element 13 disposed inside the tube 11. The two ends of the fusible element 13 are connected to the inner caps 12 at both ends, and the fusible element 13 and the inner caps 12 are usually connected by welding. The outer cap 2 is sleeved on the inner caps 12. The side wall of the outer cap 2 has a plurality of through holes distributed around it. Each through hole forms an outwardly bent spring arm 21, which is used to make contact with the inner wall of the protection terminal 5 when it is inserted into the external protection terminal 5.

[0019] Because a spring arm 21 is provided between the outer cap 2 and the protective terminal 5 to achieve an elastic connection, compared with the rigid connection of the end cap (outer cap) of the traditional fuse, stress concentration is avoided during long-term or vibration-prone use, ensuring conductivity and safety reliability. At the same time, during replacement, it can be easily and conveniently pulled out from the protective terminal 5 for quick replacement, reducing system power outage time and ensuring power supply stability.

[0020] Specifically, in this embodiment, both the outer cap 2 and the inner cap 12 are made of high-strength copper alloy or other conductive materials. The outer cap is made of materials such as copper T2H02, and the inner cap 12 is made of high-strength, high-conductivity alloys such as H62, C7025, C18400 or C18150 to ensure good mechanical strength and conductivity.

[0021] The tube body 11 is made of ceramic or resin material, providing excellent insulation and mechanical strength. The melt 13 is made of TU2 pure copper or a silver-copper alloy with higher conductivity or similar material, ensuring rapid and reliable melting during overcurrent.

[0022] Specifically, in this embodiment, the fuse includes two usage states. The first state is as follows: Figure 1 and Figure 2 As shown, one end of the fuse tube body 1 is fitted with an outer cap 2, and the other end is fitted with a round needle connector 3. The second type, as... Figure 5 As shown, both ends of the fuse tube body 1 are fitted with outer caps 2.

[0023] like Figure 3 As shown, the round needle connector 3 includes an integrally formed cap body 31 and a round needle 32. The cap body 31 is fitted onto the end of the fuse tube body 1, and the round needle 32 is used to connect an external crimping sleeve 6, enabling quick insertion and removal of the fuse. The integrated design of the cap body 31 and the round needle 32 avoids potential weaknesses caused by secondary processing such as welding or riveting, resulting in high structural strength and excellent conductivity. Furthermore, an insulating cap 4 is provided at the outer end of the round needle 32, serving as insulation protection, preventing contact with live parts, and identification.

[0024] like Figure 4 As shown, the insulating cap 4 includes an integrally formed cap portion 41 and a connecting portion 42. The connecting portion 42 has an annular cylindrical structure and is embedded within the round needle portion 32 until the cap portion 41 is in contact with the outer end of the round needle portion 32. An annular protrusion 43 is provided on the outer wall of the connecting portion 42, and an annular groove 33 that mates with the annular protrusion 43 is provided on the inner wall of the round needle portion 32. A gap groove 44 is formed on the outer wall of the connecting portion 42, extending from the outer end to the inner end of the connecting portion 42. The gap groove 44 ensures that the connecting portion 42 can be smoothly embedded into the round needle portion 32, and the convex-concave fit ensures the stability of the connection between the connecting portion 42 and the round needle portion 32.

[0025] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A fuse, characterized in that, include: The fuse tube body; An outer cap is fitted onto the end of the fuse tube body. The outer cap has multiple through holes arranged around its sidewall. Each through hole has an outwardly bent spring arm, which is used to make contact with the inner wall of the protection terminal when it is plugged into the external protection terminal.

2. The fuse according to claim 1, characterized in that, The outer caps are fitted at both ends of the fuse tube body.

3. The fuse according to claim 1, characterized in that, The outer cap is fitted onto one end of the fuse tube body, and a round needle connector is fitted onto the other end. The round needle connector includes an integrally formed cap body and a round needle body. The cap body is fitted onto the end of the fuse tube body, and the round needle body is used to connect an external crimping sleeve.

4. The fuse according to claim 3, characterized in that, An insulating cap is provided at the outer end of the circular needle.

5. The fuse according to claim 4, characterized in that, The insulating cap includes an integrally formed cap portion and a connecting portion. The connecting portion is an annular cylindrical structure and is embedded in the circular needle portion until the cap portion is attached to the outer end of the circular needle portion.

6. The fuse according to claim 5, characterized in that, The outer wall of the connecting part is provided with an annular protrusion, and the inner wall of the circular needle part is provided with an annular groove that mates with the annular protrusion.

7. The fuse according to claim 5, characterized in that, A gap groove is provided on the outer wall of the connecting part, and the gap groove extends from the outer end to the inner end of the connecting part.

8. The fuse according to claim 1, characterized in that, The fuse tube body includes a tube body, inner caps fitted at both ends of the tube body, and a fusible element disposed inside the tube body. The two ends of the fusible element are connected to the inner caps at both ends, and the outer cap is fitted onto the inner caps.

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