Detachable fuse

Abstract

The utility model relates to the technical field of fuses, and particularly discloses a detachable fuse, which comprises two connecting terminals arranged oppositely, an insulating tube positioned between the two connecting terminals, and a melt positioned in the insulating tube, wherein the connecting terminals are in threaded connection with the insulating tube, and each end of the melt is electrically connected with one connecting terminal. The detachable fuse provided by the utility model can effectively solve many problems caused by the adoption of an interference fit structure in a conventional fuse.

Description

Technical Field

[0001] The utility model relates to the technical field of fuses, in particular to a detachable fuse. Background Art

[0002] Fuses, as an important electrical protection device, are widely used in various electrical circuits. Their primary function is to protect circuits by interrupting current when an overload or short circuit occurs. Existing fuse designs often utilize an interference fit, which achieves a tight fit by utilizing the interference tolerances between components.

[0003] Currently, the industry's round tube fuse product structure is mainly divided into two categories: small round tube and large round tube terminal contact type. The structure of the small round tube fuse mainly consists of an insulating tube, a fuse located within the insulating tube, and a connecting terminal mounted at the end of the insulating tube. The connecting terminal is fixed to the end of the insulating tube through an interference fit.

[0004] The existing interference fit structure has the following problems and disadvantages:

[0005] ① Due to the strict requirements of interference fit on the dimensional tolerance of parts, unstable tolerances will cause the interference fit to become an overfit or clearance fit during assembly, thereby increasing the product production defect rate.

[0006] ② Interference fit has high requirements on material properties, such as easy processing, fatigue resistance, easy forming, high deformation requirements and hardness meeting interference requirements, which limits the choice of materials.

[0007] ③Interference fit requires specific processing equipment to achieve and is difficult to operate manually.

[0008] ④ If the interference fit assembly process is used for parts that conduct electricity for a long time, the reliability will be reduced in the long-term operation environment, and deformation will easily occur, affecting the electrical characteristics and life, and causing part failure.

[0009] ⑤ Parts with interference fit can only be used once and cannot be reused after disassembly and assembly, so they can only be scrapped, resulting in high costs.

[0010] Therefore, it is necessary to improve the existing fuse to solve the many problems caused by the interference fit structure.

[0011] The above information disclosed in this Background section is included only for enhancement of understanding of the background of the disclosure and therefore it may contain information that does not form the prior art that is currently known to a person of ordinary skill in the art. Utility Model Content

[0012] One purpose of the present utility model is to provide a detachable fuse that can effectively solve the many problems caused by the interference fit structure of the existing fuse.

[0013] To achieve the above purpose, the utility model provides a detachable fuse, comprising two oppositely arranged connecting terminals, an insulating tube located between the two connecting terminals, and a fuse passing through the insulating tube;

[0014] The connecting terminal is threadedly connected to the insulating tube, and each end of the melt is electrically connected to one of the connecting terminals.

[0015] Optionally, the exterior of the insulating tube is provided with external threads.

[0016] The connecting terminal is provided with a receiving groove for the end portion of the insulating tube to enter, and the groove wall of the receiving groove is provided with an internal thread matching the external thread.

[0017] Optionally, the melt includes two fixing portions located outside the insulating tube, and an inclined portion connecting the two fixing portions and located inside the insulating tube.

[0018] The two fixing portions are arranged along the diagonal edges of the insulating tube, so that the inclined portion and the two fixing portions are arranged at obtuse angles.

[0019] Optionally, an annular abutment surface is provided at the end surface of the insulating tube;

[0020] The fixing portion is located between the annular abutting surface and the bottom of the accommodating groove, and is pressed and fixed by the annular abutting surface and the bottom of the accommodating groove.

[0021] Optionally, the connecting terminal is a metal part.

[0022] Optionally, the inner wall of the insulating tube is provided with an internal thread, and the outside of the connecting terminal is provided with an external thread matching the internal thread.

[0023] Optionally, the connecting terminal includes a conductive portion conductively connected to the fuse and an insulating portion threadedly connected to the insulating tube.

[0024] Optionally, the conductive part is threadably connected to the insulating part.

[0025] The beneficial effect of the utility model is that it provides a detachable fuse, in which the connecting terminal and the insulating tube are threadedly connected, and connection and disassembly are achieved by rotating action, which not only reduces the difficulty of assembly, but also allows multiple disassembly and assembly, thereby improving the maintainability and reusability of the components.

[0026] Therefore, the detachable fuse provided by the present invention effectively solves many problems caused by the interference fit structure of existing fuses. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0028] Figure 1 A schematic structural diagram of the detachable fuse provided in Example 1;

[0029] Figure 2 A schematic cross-sectional view of the detachable fuse provided in Example 1;

[0030] Figure 3 This is a schematic structural diagram of the detachable fuse provided in Example 2.

[0031] In the picture:

[0032] 1. Connecting terminal; 101. Accommodating groove; 102. Conductive portion; 103. Insulating portion;

[0033] 2. Insulating tube; 201. Annular abutting surface;

[0034] 3. Melt; 301. Fixed portion; 302. Inclined portion. DETAILED DESCRIPTION

[0035] References to "embodiments" in this utility model mean that the specific features, structures, or characteristics described in conjunction with the embodiments may be included in at least one embodiment of the utility model. The appearance of the term "embodiment" in various places in the specification does not necessarily refer to the same embodiment, nor does it specifically limit its independence or relevance to other embodiments. In principle, in this utility model, as long as there are no technical contradictions or conflicts, the various technical features mentioned in the various embodiments can be combined in any manner to form a corresponding implementable technical solution.

[0036] Unless otherwise defined, the technical terms used herein have the same meanings as those generally understood by those skilled in the art to which the present invention belongs. The use of relevant terms herein is only for describing specific embodiments and is not intended to limit the present invention.

[0037] In the description of this utility model, the term "and / or" is used to describe a logical relationship between objects, indicating that three relationships can exist. For example, A and / or B means: A exists, B exists, and both A and B exist. In addition, the character " / " in this document generally indicates that the objects before and after are in a logical "or" relationship.

[0038] In the present invention, terms such as "first" and "second" are merely used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship of quantity, priority or sequence between these entities or operations.

[0039] Without further restrictions, in the present invention, the words "include", "comprise", "have" or other similar expressions used in sentences are intended to cover non-exclusive inclusion. These expressions do not exclude the presence of additional elements in the process, method or product including the elements, so that the process, method or product including a series of elements may include not only those limited elements, but also other elements not explicitly listed, or also include elements inherent to such process, method or product.

[0040] Consistent with the understanding in the Examination Guidelines, in this utility model, expressions such as "greater than," "less than," and "exceed" are understood to exclude the number itself; expressions such as "above," "below," and "within" are understood to include the number itself. Furthermore, in the description of the embodiments of this utility model, "multiple" means two or more (including two), and similar expressions related to "multiple," such as "multiple groups" and "multiple times," are also understood in this manner, unless otherwise specifically defined.

[0041] In the description of the embodiments of the present invention, the space-related expressions used, such as "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "vertical", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicate the orientation or position relationship based on the orientation or position relationship shown in the specific embodiments or drawings, and are only for the convenience of describing the specific embodiments of the present invention or facilitating the reader's understanding, and do not indicate or imply that the device or component referred to must have a specific position, a specific orientation, or be constructed or operated in a specific orientation. Therefore, it should not be understood as a limitation on the embodiments of the present invention.

[0042] Unless otherwise expressly specified or limited, in the description of the embodiments of the present invention, the terms "installed", "connected", "connected", "fixed", "set", etc. used should be understood in a broad sense. For example, the "connection" can be a fixed connection, a detachable connection, or an integrated setting; it can be a mechanical connection, an electrical connection, or a communication connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. For those skilled in the technical field of the present invention, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

[0043] The utility model provides a detachable fuse, which is suitable for cutting off the current when an overload or short circuit occurs in the circuit to prevent safety accidents such as damage to electrical equipment and fire. It can effectively solve many problems caused by the interference fit structure of existing fuses.

[0044] This embodiment provides a detachable fuse, comprising two oppositely arranged connecting terminals, an insulating tube located between the two connecting terminals, and a fuse passing through the insulating tube; wherein the connecting terminals are threadedly connected to the insulating tube, and each end of the fuse is electrically connected to one of the connecting terminals.

[0045] The detachable fuse provided in this embodiment has a threaded connection between the connecting terminal and the insulating tube, and connection and removal are achieved by rotation. This not only reduces the difficulty of assembly, but also allows multiple disassembly and assembly, thereby improving maintainability and reusability of the components.

[0046] That is, the detachable fuse provided by the present invention has the following advantages:

[0047] ①Easy to assemble and maintain: The threaded connection method makes the connection and disassembly between the connection terminal and the insulating tube simple, reducing the difficulty of assembly and improving maintenance efficiency.

[0048] ② Reusability: Since the threaded connection allows multiple disassembly and assembly, the connection terminals and fuses can be reused after repair or replacement, reducing waste and lowering costs.

[0049] Therefore, the detachable fuse provided by the present invention effectively solves many problems caused by the interference fit structure of existing fuses.

[0050] Next, various implementations of the detachable fuse of the present invention will be introduced with reference to the accompanying drawings.

[0051] Example 1

[0052] See also Figure 1 and Figure 2In the detachable fuse provided in this embodiment, the connecting terminal 1 is a metal part. Since the connecting terminal 1 is electrically connected to the fuse 3, when in use, the connecting terminal 1 can be directly connected to the circuit.

[0053] Specifically, the exterior of the insulating tube 2 is provided with an external thread, the connecting terminal 1 is provided with a receiving groove 101 for the end of the insulating tube 2 to enter, and the groove wall of the receiving groove 101 is provided with an internal thread matching the external thread.

[0054] Furthermore, the melt 3 includes two fixing parts 301 located outside the insulating tube 2, and an inclined part 302 connecting the two fixing parts 301 and located inside the insulating tube 2; wherein, the two fixing parts 301 are arranged along the diagonals of the insulating tube 2, so that the inclined part 302 and the two fixing parts 301 are arranged at an obtuse angle.

[0055] Optionally, an annular abutment surface 201 is provided at the end surface of the insulating tube 2; the fixing portion 301 is located between the annular abutment surface 201 and the bottom of the accommodating groove 101, and is pressed and fixed by the annular abutment surface 201 and the bottom of the accommodating groove 101.

[0056] When installing the fuse 3, first secure one end of the fuse 3 with one connection terminal 1, then tighten the fuse 3 diagonally across the insulating tube 2, and then secure the other connection terminal 1. This diagonal installation method facilitates tightening the fuse 3, preventing uneven stress distribution within the fuse 3 and reduced fusing stability caused by insufficient tension.

[0057] The detachable fuse provided in this embodiment has the following advantages:

[0058] ① Optimized design of the melt 3: The design of the fixed portion 301 and the inclined portion 302 of the melt 3 helps to evenly distribute the current, improve the stability of the fusing, and reduce the arc effect.

[0059] ② Diagonal installation: The diagonal installation of the fixing portion 301 helps to tighten the fuse 3, avoids the problem of uneven stress distribution inside the fuse 3, and improves the performance of the fuse.

[0060] ③ Compact structure: The design of the annular abutting surface 201 and the accommodating groove 101 makes the melt 3 more firmly fixed while maintaining the compactness of the structure.

[0061] Example 2

[0062] See also Figure 3 In the detachable fuse provided in this embodiment, the inner wall of the insulating tube 2 is provided with an internal thread, and the outer side of the connecting terminal 1 is provided with an external thread matching the internal thread.

[0063] Specifically, the connecting terminal 1 includes a conductive portion 102 conductively connected to the fuse 3 and an insulating portion 103 threadedly connected to the insulating tube 2 .

[0064] Optionally, the conductive portion 102 is threadedly connected to the insulating portion 103, and the end of the melt 3 is threadedly connected to the conductive portion 102. All components are threadedly connected, which is convenient for assembly and disassembly, and helps to reduce the maintenance cost in the later stage.

[0065] Of course, in some other embodiments, the conductive portion 102 and the insulating portion 103 may be formed by an in-mold injection molding structure, and the melt 3 and the conductive portion 102 may be formed by a welding connection structure, which is not limited in the present invention.

[0066] The detachable fuse provided in this embodiment has the following advantages:

[0067] ① Full thread connection: The conductive part 102, the insulating part 103 and the end of the fuse 3 are all threaded, making the assembly and disassembly of the entire fuse assembly more convenient.

[0068] ② Reduce maintenance costs: Since all parts can be quickly replaced through threaded connections, long-term maintenance costs are reduced.

[0069] ③ Good electrical performance: The presence of the insulating portion 103 ensures good insulation between the conductive portion 102 and the insulating tube 2, thereby improving the electrical safety of the fuse.

[0070] Finally, it should be noted that although the above embodiments have been described in the specification and drawings of this application, this does not limit the scope of patent protection of this application. All technical solutions generated by replacing or modifying equivalent structures or equivalent processes based on the essential concepts of this application using the contents recorded in the specification and drawings of this application, as well as directly or indirectly implementing the technical solutions of the above embodiments in other related technical fields, are included in the scope of patent protection of this application.

Claims

1. A detachable fuse, characterized in that: It comprises two connecting terminals (1) arranged opposite to each other, an insulating tube (2) located between the two connecting terminals (1), and a melt (3) passing through the insulating tube (2); The connecting terminal (1) is threadedly connected to the insulating tube (2), and each end of the fuse (3) is electrically connected to one of the connecting terminals (1).

2. The detachable fuse according to claim 1, characterized in that: The exterior of the insulating tube (2) is provided with an external thread. The connecting terminal (1) is provided with a receiving groove (101) for the end of the insulating tube (2) to enter, and the groove wall of the receiving groove (101) is provided with an internal thread matching the external thread.

3. The detachable fuse according to claim 2, characterized in that: The melt (3) comprises two fixing portions (301) located outside the insulating tube (2), and an inclined portion (302) connecting the two fixing portions (301) and located inside the insulating tube (2). The two fixing portions (301) are arranged along the diagonal edges of the insulating tube (2), so that the inclined portion (302) and the two fixing portions (301) are arranged at obtuse angles.

4. The detachable fuse according to claim 3, characterized in that: An annular abutting surface (201) is provided at the end surface of the insulating tube (2); The fixing portion (301) is located between the annular abutting surface (201) and the bottom of the accommodating groove (101), and is pressed and fixed by the annular abutting surface (201) and the bottom of the accommodating groove (101).

5. The detachable fuse according to claim 2, characterized in that: The connecting terminal (1) is a metal part.

6. The detachable fuse according to claim 1, characterized in that: The inner wall of the insulating tube (2) is provided with an internal thread, and the exterior of the connecting terminal (1) is provided with an external thread matching the internal thread.

7. The detachable fuse according to claim 6, characterized in that: The connecting terminal (1) comprises a conductive portion (102) conductively connected to the fuse (3) and an insulating portion (103) threadedly connected to the insulating tube (2).

8. The detachable fuse according to claim 7, characterized in that: The conductive portion (102) is threadably connected to the insulating portion (103).

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