Fuse terminal parallelism detection clamp and fuse thereof

Abstract

The utility model discloses a fuse terminal parallelism detection clamp and a fuse thereof, and relates to the fuse detection technology field, the fuse terminal parallelism detection clamp comprises a clamp body, the clamp body is composed of an outer cap positioning part and terminal positioning detection parts symmetrically arranged below the outer cap positioning part, the outer cap positioning part is internally provided with an outer cap through hole, and the outer cap through hole is internally provided with an inner cap through hole. The terminal positioning detection part comprises a first terminal positioning part and a second terminal positioning part which are arranged in parallel, a terminal through hole is formed between the inner sides, one end of the through hole is communicated with the outer cap through hole, and the other end of the through hole is open. According to the utility model, the maximum offset included angle of the two terminals is detected through the parallelism gauge, and if the fuse can smoothly pass through the parallelism gauge of the detection clamp and the terminals can smoothly pass through the terminal through holes, the fuse is a qualified product. According to the detection mode, errors caused by manual measurement of the terminal parallelism can be avoided, the detection deviation is effectively reduced, meanwhile, the detection efficiency of the fuse terminal parallelism is greatly improved, the detection process is optimized, and the accuracy and stability of a detection result are guaranteed.

Description

Technical Field

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

[0002] A fuse is an electrical device that breaks a circuit by melting a fusible element when the current exceeds a specified value. Fuses are current protection devices that utilize the principle that when the current exceeds a specified value for a certain period, the heat generated by the fuse itself melts the fusible element, thus breaking the circuit. Fuses are widely used in high and low voltage power distribution systems, control systems, and electrical equipment as short-circuit and overcurrent protectors, and are one of the most commonly used protective devices.

[0003] During the installation and use of fuses, the parallelism of the fuse terminals is a key factor in ensuring product quality and electrical safety. This ensures that the fuse can be reliably mounted on the PCB (Printed Circuit Board) and effectively cut off the circuit when needed. Currently, the common method for checking fuse terminal parallelism is to insert the fuse onto the PCB and then use a thickness gauge to check the misalignment angle of the terminals to determine whether it is a qualified or unqualified product. However, this method is not only inefficient and time-consuming, but also susceptible to human measurement errors, resulting in a high defect rate.

[0004] Therefore, how to provide a fuse terminal parallelism testing fixture and its fuse is a problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0005] The purpose of this utility model is to provide a fuse terminal parallelism testing fixture and a fuse thereof, aiming to solve the above-mentioned technical problems. This utility model uses a parallelism gauge to detect the maximum offset angle between the two terminals: the fuse is qualified if it can pass smoothly through the parallelism gauge of the testing fixture under its own weight, that is, the fuse terminal structure can pass smoothly through the terminal through hole. This testing method can avoid errors caused by manual measurement of parallelism, greatly improve the testing efficiency, and save time and effort.

[0006] To achieve the above objectives, this utility model employs the following technical solution:

[0007] A fuse terminal parallelism testing fixture and a fuse thereof, comprising a fixture body, the fixture body including an outer cap positioning part and a terminal positioning detection part, the terminal positioning detection part being symmetrically arranged below the outer cap positioning part, the outer cap positioning part having an outer cap through hole, the terminal positioning detection part including a first terminal positioning part and a second terminal positioning part, the first terminal positioning part and the second terminal positioning part being arranged parallel to each other, and a terminal through hole being formed between the inner sides of the first terminal positioning part and the inner sides of the second terminal positioning part, one end of the terminal through hole communicating with the outer cap through hole, the other end of the terminal through hole being open. This utility model is designed with a special parallelism gauge according to the shape of the fuse and actual needs, which can quickly and accurately test parallelism.

[0008] Furthermore, the first terminal positioning part has a first inner end face on its inner side, and the second terminal positioning part has a second inner end face on its inner side, with the first inner end face and the second inner end face being arranged in a plane parallel to each other.

[0009] Furthermore, a first arc-shaped portion is provided between the first inner end face and the outer side of the first terminal positioning portion, and a second arc-shaped portion is provided between the second inner end face and the outer side of the second terminal positioning portion. Both the first arc-shaped portion and the second arc-shaped portion are provided with a smooth shape.

[0010] Furthermore, the outer side of the clamp body is a smooth circular shape, the first inner end face and the second inner end face are both smooth, and the wall of the hole of the outer cap is smooth.

[0011] This utility model also discloses a fuse for testing, applied to the fuse terminal parallelism testing fixture described in any of the above claims, comprising a fuse tube, a terminal structure and a cap structure, wherein the cap structure is symmetrically fitted at both ends of the fuse tube, and the terminal structure is symmetrically installed at both ends of the fuse tube.

[0012] Furthermore, the terminal structure includes a first terminal and a second terminal, one end of the first terminal being connected to one port of the fusible tube, and one end of the second terminal being connected to the other port of the fusible tube.

[0013] Furthermore, the cap structure includes a first outer cap, a first inner cap, a second outer cap, and a second inner cap. The first inner cap is fitted onto one end of the melting tube, the first outer cap is fitted onto the first inner cap, the second inner cap is fitted onto the other end of the melting tube, and the second outer cap is fitted onto the second inner cap.

[0014] Furthermore, a first through portion is provided on one side of the first terminal, a second through portion is provided on the other side of the first terminal, a third through portion is provided on one side of the second terminal, and a fourth through portion is provided on the other side of the second terminal.

[0015] Furthermore, the fusion tube is a ceramic tube.

[0016] This utility model relates to a fuse terminal parallelism testing fixture and its fuse, which has the following beneficial effects:

[0017] 1. This utility model relates to a fuse terminal parallelism testing fixture. Using a dedicated parallelism testing fixture, with the first terminal positioning part and the second terminal positioning part arranged in parallel and the first inner end face and the second inner end face arranged in a planar parallel configuration, this utility model uses a parallelism gauge to detect the maximum offset angle between the two terminals. If the fuse can smoothly pass through the parallelism gauge of this utility model's testing fixture under its own weight, it is considered a qualified product. In other words, if the fuse's terminal structure can smoothly pass through the terminal through-hole, it is considered a qualified product. This testing method avoids errors caused by manual parallelism measurement, greatly improving testing efficiency and saving time and effort.

[0018] 2. The ceramic tube of the fuse of this utility model adopts a double-cap nested structure. Compared with the traditional single-cap structure, this utility model has the advantages of stronger fastening, better dust and moisture protection, reduced contact resistance, enhanced anti-arc ability and prevention of shell cracking. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the fuse terminal parallelism testing fixture and the fuse of this utility model. Figure 1 ;

[0020] Figure 2 This is a schematic diagram of the overall structure of the fuse terminal parallelism testing fixture and the fuse of this utility model. Figure 2 ;

[0021] Figure 3 This is a schematic diagram of the overall structure of the fuse terminal parallelism testing fixture of this utility model. Figure 1 ;

[0022] Figure 4 This is a schematic diagram of the overall structure of the fuse terminal parallelism testing fixture of this utility model. Figure 2 ;

[0023] Figure 5 This is an exploded view of the structure of the fuse of this utility model;

[0024] The labels shown in the diagram are:

[0025] 1. Fixture body; 2. Outer cap positioning part; 3. Terminal positioning detection part; 4. Outer cap through hole; 5. First terminal positioning part; 6. Second terminal positioning part; 7. Terminal through hole; 8. First inner end face; 9. First arc-shaped part; 10. Second arc-shaped part; 11. Fusion tube; 12. Terminal structure; 13. Cap structure; 14. First terminal; 15. Second terminal; 16. First outer cap; 17. First inner cap; 18. Second outer cap; 19. Second inner cap; 20. First through part; 21. Second through part; 22. Third through part; 23. Fourth through part; 24. First terminal connection part. Detailed Implementation

[0026] To enable those skilled in the art to better understand the technical solution of this utility model, the product of this utility model will be further described in detail below with reference to the embodiments and accompanying drawings.

[0027] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly attached to the other element or there may be an intervening element; when an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items. Example

[0029] like Figures 1 to 3 As shown, a fuse terminal parallelism testing fixture includes a fixture body 1. The fixture body 1 includes an outer cap positioning part 2 and a terminal positioning detection part 3. The terminal positioning detection part 3 is symmetrically arranged below the outer cap positioning part 2. The outer cap positioning part 2 has an outer cap through hole 4. The terminal positioning detection part 3 includes a first terminal positioning part 5 and a second terminal positioning part 6. The first terminal positioning part 5 and the second terminal positioning part 6 are arranged in parallel, and a terminal through hole 7 is formed between the inner side of the first terminal positioning part 5 and the inner side of the second terminal positioning part 6. One end of the terminal through hole 7 communicates with the outer cap through hole 4, and the other end of the terminal through hole 7 is open.

[0030] like Figure 4As shown, the first terminal positioning part 5 has a first inner end face 8 on its inner side, and the second terminal positioning part 6 has a second inner end face on its inner side. The first inner end face 8 and the second inner end face are arranged in a plane parallel to each other, and a terminal through hole 7 is formed between the first inner end face 8 and the second inner end face.

[0031] It should be noted that, since the first inner end face 8 and the second inner end face are set in a plane parallel, the maximum offset angle between the two terminals is detected by a parallelism gauge: if the weight of the fuse itself passes smoothly through the parallelism gauge of the detection fixture of this utility model, it is a qualified product, that is, if the terminal structure 12 of the fuse can pass smoothly through the terminal through hole 7, it is a qualified product. This detection can avoid errors caused by manual measurement and greatly improve the detection efficiency.

[0032] like Figure 4 As shown, a first arc-shaped portion 9 is provided between the first inner end face 8 and the outer side of the first terminal positioning portion 5, and a second arc-shaped portion 10 is provided between the second inner end face and the outer side of the second terminal positioning portion 6. Both the first arc-shaped portion 9 and the second arc-shaped portion 10 are provided with a smooth shape.

[0033] like Figures 1 to 4 As shown, the outer side of the clamp body 1 is a smooth circular shape, the first inner end face 8 and the second inner end face are both smooth, and the hole wall of the outer cap through hole 4 is smooth, which is beneficial for the fuse to fall according to its own weight to detect the parallelism of the terminals. Example

[0034] like Figure 1 and Figure 5 As shown, a fuse for testing is applied to the above-mentioned fuse terminal parallelism testing fixture, including a fuse tube 11, a terminal structure 12 and a cap structure 13. The cap structure 13 is symmetrically sleeved on both ends of the fuse tube 11, and the terminal structure 12 is symmetrically installed at the two ends of the fuse tube 11.

[0035] It should be noted that the fuse also includes common components such as a fusible element (not shown in the figure). The fusible element is installed inside the fuse tube 11, and the terminal structure 12 is connected to the fusible element. The fusible element is responsible for melting when the current exceeds a specified value, thereby breaking the circuit. In this embodiment, the fusible element can be made of a low melting point metal (such as lead-tin alloy, zinc) or a high melting point metal (such as silver, copper), and its shape can be filament, sheet, or strip.

[0036] like Figure 1 and Figure 2 As shown, the fusion tube 11 is a ceramic tube.

[0037] It should be noted that the fusion tube 11 is the outer shell for mounting the molten material. The fusion tube 11 of this utility model is a ceramic tube. Compared with other materials (such as plastic, glass, metal, etc.), this utility model has the advantages of excellent high temperature resistance, high insulation strength, good mechanical strength and impact resistance, good chemical stability, good corrosion resistance, and high safety and reliability.

[0038] It should be further explained that the fusion tube 11 in this embodiment can also be filled with insulating sand particles (such as quartz sand). These sand particles absorb the heat from the electric arc and metal vapor to rapidly cool the molten material, thereby extinguishing the arc and improving safety during use.

[0039] like Figure 5 As shown, the terminal structure 12 includes a first terminal 14 and a second terminal 15. One end of the first terminal 14 is connected to one port of the fuse tube 11, and one end of the second terminal 15 is connected to the other port of the fuse tube 11.

[0040] It should be noted that the first terminal 14 and the second terminal 15 are conductive components that connect the molten metal to the external circuit, ensuring that the current flows stably through the molten metal. In this embodiment, both the first terminal 14 and the second terminal 15 can be made of materials such as copper, silver-plated metal, or silver-plated copper to reduce contact resistance and ensure low contact resistance and reliable arc extinguishing.

[0041] like Figure 5 As shown, the cap structure 13 includes a first outer cap 16, a first inner cap 17, a second outer cap 18, and a second inner cap 19. The first inner cap 17 is fitted onto one end of the melting tube 11, the first outer cap 16 is fitted onto the first inner cap 17, the second inner cap 19 is fitted onto the other end of the melting tube 11, and the second outer cap 18 is fitted onto the second inner cap 19. During testing, both the first outer cap 16 and the second outer cap 18 can move through the outer cap perforation 4.

[0042] It should be noted that the ceramic tube of this utility model adopts a double-cap nested structure (both ends have an inner cap + an outer cap). Compared with the traditional single-cap structure (one cap at each end), this utility model has the following advantages: stronger fastening, the inner cap is directly fitted onto the ceramic tube, and the outer cap then covers the inner cap, forming a double-layer fixation, preventing the caps from loosening or falling off due to vibration or thermal expansion and contraction; better dust and moisture protection, the double-cap structure (especially the outer cap) can further block external dust and moisture from entering the interior of the ceramic tube, protecting the molten material from corrosion; reduced contact resistance, the inner cap fits tightly with the ceramic tube, and the outer cap then presses the inner cap, ensuring a more stable connection between the terminal structure 12 and the molten material, reducing the heating problem caused by poor contact; enhanced arc resistance, the double-cap structure can disperse arc energy, avoiding high temperature concentration damage to the single-layer cap; when the fuse melts, it may generate gas or pressure, the double-cap structure can better withstand the internal pressure, preventing the outer shell from bursting.

[0043] like Figure 5 As shown, the length of the first outer cap 16 is greater than the length of the first inner cap 17, and the length of the second outer cap 18 is greater than the length of the second inner cap 19. One end of the first outer cap 16, one end of the first inner cap 17, one end of the second outer cap 18, and one end of the second inner cap 19 are all open, which makes it easy to fit onto the fusible tube 11. The other end of the first outer cap 16, the other end of the first inner cap 17, the other end of the second outer cap 18, and the other end of the second inner cap 19 are all provided with through holes, which makes it easy to fix the first terminal 14 and the second terminal 15, and at the same time facilitates the connection of the first terminal 14 and the second terminal 15 to the fusible tube 11.

[0044] like Figure 5 As shown, the first terminal 14 has a first through portion 20 on one side and a second through portion 21 on the other side. The second terminal 15 has a third through portion 22 on one side and a fourth through portion 23 on the other side. During detection, the first through portion 20 and the third through portion 22 can contact the first inner end face 8, and the second through portion 21 and the fourth through portion 23 can contact the second inner end face.

[0045] like Figure 5 As shown, the thickness of the first terminal 14 and the second terminal 15 can both be 1 mm to 2 mm. In this embodiment, the thickness of the first terminal 14 and the second terminal 15 is preferably 1 mm.

[0046] like Figure 5 As shown, the first terminal 14 is provided with a first terminal connection portion 24, and the second terminal 15 is provided with a second terminal connection portion. Both the first terminal connection portion 24 and the second terminal connection portion pass through the through hole and are connected to the fusible tube 11.

[0047] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model in any way. Those skilled in the art can readily implement this utility model based on the accompanying drawings and the above description. However, any modifications, alterations, or equivalent variations made by those skilled in the art without departing from the scope of the utility model's technical solution, utilizing the disclosed technical content, are considered equivalent embodiments of this utility model. Furthermore, any equivalent changes, alterations, or variations made to the above embodiments based on the essential technology of this utility model are still within the protection scope of this utility model's technical solution.

Claims

1. A fuse terminal parallelism detection fixture, characterized by: The fixture includes a clamp body (1), which includes an outer cap positioning part (2) and a terminal positioning detection part (3). The terminal positioning detection part (3) is symmetrically arranged below the outer cap positioning part (2). The outer cap positioning part (2) has an outer cap through hole (4). The terminal positioning detection part (3) includes a first terminal positioning part (5) and a second terminal positioning part (6). The first terminal positioning part (5) and the second terminal positioning part (6) are arranged in parallel. A terminal through hole (7) is formed between the inner side of the first terminal positioning part (5) and the inner side of the second terminal positioning part (6). One end of the terminal through hole (7) communicates with the outer cap through hole (4), and the other end of the terminal through hole (7) is open.

2. The fuse terminal parallelism detection fixture of claim 1, wherein: The first terminal positioning part (5) has a first inner end face (8) on its inner side, and the second terminal positioning part (6) has a second inner end face on its inner side. The first inner end face (8) and the second inner end face are arranged in a plane parallel to each other.

3. The fuse terminal parallelism detection fixture of claim 2, wherein: A first arc-shaped portion (9) is provided between the first inner end face (8) and the outer side of the first terminal positioning portion (5), and a second arc-shaped portion (10) is provided between the second inner end face and the outer side of the second terminal positioning portion (6). Both the first arc-shaped portion (9) and the second arc-shaped portion (10) are provided with a smooth shape.

4. The fuse terminal parallelism detection fixture of claim 3, wherein: The outer side of the clamp body (1) is a smooth circular shape, the first inner end face (8) and the second inner end face are both smooth, and the wall of the outer cap through hole (4) is smooth.

5. A fuse for detection, applied to the fuse terminal parallelism detection jig according to any one of claims 1-4, characterized in that: It includes a fusion tube (11), a terminal structure (12) and a cap structure (13). The cap structure (13) is symmetrically fitted on both ends of the fusion tube (11), and the terminal structure (12) is symmetrically installed at both ends of the fusion tube (11).

6. The fuse for detection according to claim 5, characterized in that: The terminal structure (12) includes a first terminal (14) and a second terminal (15). One end of the first terminal (14) is connected to one port of the fuse tube (11), and one end of the second terminal (15) is connected to the other port of the fuse tube (11).

7. The fuse for detection according to claim 6, characterized in that: The cap structure (13) includes a first outer cap (16), a first inner cap (17), a second outer cap (18), and a second inner cap (19). The first inner cap (17) is fitted onto one end of the melting tube (11), the first outer cap (16) is fitted onto the first inner cap (17), the second inner cap (19) is fitted onto the other end of the melting tube (11), and the second outer cap (18) is fitted onto the second inner cap (19).

8. The fuse for detection according to claim 7, characterized in that: The first terminal (14) has a first through part (20) on one side, a second through part (21) on the other side, a third through part (22) on one side, and a fourth through part (23) on the other side.

9. The fuse for detection according to claim 8, characterized in that: The fusion tube (11) is a ceramic tube.

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