A robust tubular fuse

Abstract

The utility model discloses a stable type tubular fuse, including ceramic pipe, fuse element, pole cap and filler, the ceramic pipe is tubular, the ceramic pipe both pipe mouth outer end is provided with the port plane that is symmetrical up and down, and the ceramic pipe is internally provided with the fuse element that leans to place, the middle part of fuse element remains the original column shape, and the both ends of fuse element are flattened and bent, and the flattened and bent part of both ends of fuse element is clamped at the port plane, and the both ends of ceramic pipe are sleeved with the pole cap, and the pole cap is built -in with tin, and both ends of fuse element are welded together through tin and the pole cap, and the ceramic pipe is also filled with the filler. Through above -mentioned mode, the utility model effectively controls product size, and the middle part of fuse element is thick, does not affect filling quartz sand, does not affect breaking capacity, and both ends of fuse element are flattened and bent, and the utility model is convenient to install, and the assembly is stable, and convenient to weld.

Description

Technical Field

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

[0002] A fuse, also known as a current fuse, is mainly used for overload protection. When a fuse is properly installed in a circuit, it will melt and break the current when the current rises abnormally to a certain level or temperature, thus protecting the safe operation of the circuit. Tubular fuses are a common type, and they contain a fusible element.

[0003] Fuse elements come in cylindrical and flattened sheet structures. Cylindrical structures are difficult to center during assembly, leading to issues with size matching and weld strength. Fuse elements are uniformly flattened, resulting in a smaller heat capacity, extremely rapid temperature rise, and weak surge protection, particularly for high-I... 2 For T products, the melt element becomes thicker as the current ampere increases. An excessively thick melt element becomes wider after being flattened, which is not conducive to production. At the same time, with the ceramic tube aperture, the thicker the melt element, the more space it occupies inside the tube after being flattened, making it difficult to fill with quartz sand, thus affecting the product's breaking ability.

[0004] Based on the above defects and shortcomings, it is necessary to improve the existing technology and design a robust tubular fuse. Utility Model Content

[0005] The main technical problem solved by this utility model is to provide a stable tubular fuse that effectively controls the product size. The fuse element is thickened in the middle, which does not affect the filling of quartz sand or the breaking capacity. The two ends of the fuse element are flattened and bent for easy installation, stable assembly, and easy welding.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: providing a stable tubular fuse, which includes a ceramic tube, a fusing element, a cap, and a filler. The ceramic tube is tubular, and the two outer ends of the ceramic tube are provided with symmetrical port planes. The fusing element is installed inside the ceramic tube and is placed obliquely. The middle part of the fusing element retains its original column shape. The two ends of the fusing element are flattened and bent, and the flattened and bent parts of the two ends of the fusing element are snapped into the port planes. The two ends of the ceramic tube are fitted with caps, and the caps are filled with tin. The two ends of the fusing element are soldered to the caps with tin. The ceramic tube is also filled with a filler.

[0007] Preferably, the fusible element includes a cylindrical portion and flattened and bent portions located at both ends of the cylindrical portion, with the two flattened and bent portions bending in opposite directions.

[0008] Preferably, the flattened and bent portion includes a first flat portion extending in the same direction as the cylindrical portion, a bent portion perpendicularly connected to the first flat portion, and a second flat portion perpendicularly connected to the bent portion and opposite to the extending direction of the cylindrical portion. The first flat portion is located inside the ceramic tube, the inner side of the bent portion is in close contact with the opening of the ceramic tube, and the second flat portion is located at the port plane.

[0009] Preferably, the fuse element has an additional feature in the middle for improving product I. 2 T-shaped solder balls with breaking capacity.

[0010] Preferably, the port has a shallow planar opening design.

[0011] Preferably, the filler is quartz sand.

[0012] Compared with the prior art, the beneficial effects of this utility model are: The ceramic tube has port planes at both ends of the tube opening. The flattened and bent parts of the two ends of the fusion element are snapped into the port planes. The flattened and bent parts are tightly attached to the ceramic tube without gaps, which makes the assembly stable and easy to weld. This can help solve the problem of welding and assembly production of high current specifications. The fuse element retains its original column shape in the middle, preserving the integrity of the middle part of the fuse element, resulting in a larger heat capacity, slower heating, and stronger surge resistance. The middle part of the fuse element is thickened, which does not affect the filling of quartz sand or the breaking capacity. The two ends of the fuse element are flattened and bent for easy installation. A solder ball is added to the middle of the fuse element, I 2 The T-value can be increased even further. Attached Figure Description

[0013] Figure 1 This is a cross-sectional view of a robust tubular fuse.

[0014] Figure 2 This is a schematic diagram of a ceramic tube structure for a robust tubular fuse.

[0015] Figure 3 This is a schematic diagram of the fusing element structure of a robust tubular fuse.

[0016] Among them, 1. ceramic tube, 10. port plane, 2. fuse element, 20. solder ball, 21. cylindrical part, 22. flattened and bent part, 221. first flat part, 222. bent part, 223. second flat part, 3. pole cap, 4. filler. Detailed Implementation

[0017] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the scope of protection of the present invention.

[0018] Please see Figures 1 to 3 The embodiments of this utility model include: A robust tubular fuse includes a ceramic tube 1, a fusing element 2, a cap 3, and a filler 4. The ceramic tube 1 is tubular, with symmetrical port planes 10 at both ends. The port planes 10 are shallow. The fusing element 2 is installed inside the ceramic tube 1, with the middle part retaining its original column shape. The two ends of the fusing element 2 are flattened and bent, and the flattened and bent portions 22 at both ends of the fusing element 2 are fitted into the port planes 10. The caps 3 are fitted onto both ends of the ceramic tube 1, and the caps 3 contain tin. The two ends of the fusing element 2 are soldered to the caps 3 by the tin. The ceramic tube 1 is also filled with a filler 4, which is made of quartz sand.

[0019] The fusible element 2 includes a cylindrical portion 21 and flattened and bent portions 22 located at both ends of the cylindrical portion 21. The bending directions of the two flattened and bent portions 22 are opposite, so that the fusible element 2 is placed obliquely inside the ceramic tube 1. The flattened and bent portion 22 includes a first flat portion 221 extending in the same direction as the cylindrical portion 21, a bent portion 222 perpendicularly connected to the first flat portion 221, and a second flat portion 223 perpendicularly connected to the bent portion 222 and extending in the opposite direction to the cylindrical portion 21. The first flat portion 221 is located inside the ceramic tube 1, and the inner side of the bent portion 222 is in close contact with the opening of the ceramic tube 1. The second flat portion 223 is located at the port plane 10. The fusible element 2 is further provided with a middle section for improving the product I. 2 T-type tin ball with breaking capacity 20.

[0020] This utility model discloses a stable tubular fuse that effectively controls product size. The fuse element is thickened in the middle, which does not affect the filling of quartz sand or the breaking capacity. The two ends of the fuse element are flattened and bent for easy installation, stable assembly, and easy welding.

[0021] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A robust tubular fuse, characterized in that: The ceramic tube (1), the fusible element (2), the electrode cap (3), and the filler (4) are included. The ceramic tube (1) is tubular. The two ends of the ceramic tube (1) are provided with symmetrical port planes (10). The ceramic tube (1) contains a fusible element (2) placed obliquely. The middle part of the fusible element (2) retains its original column shape. The two ends of the fusible element (2) are flattened and bent. The flattened and bent parts (22) at both ends of the fusible element (2) are clamped at the port plane (10). The two ends of the ceramic tube (1) are fitted with electrode caps (3). The electrode caps (3) contain tin. The two ends of the fusible element (2) are welded together with the electrode caps (3) by tin. The ceramic tube (1) is also filled with filler (4).

2. The robust tubular fuse according to claim 1, characterized in that: The fuse element (2) includes a cylindrical part (21) and flattened and bent parts (22) located at both ends of the cylindrical part (21), with the two flattened and bent parts (22) bending in opposite directions.

3. A robust tubular fuse according to claim 1, characterized in that: The flattened and bent portion (22) includes a first flat portion (221) extending in the same direction as the cylindrical portion (21), a bent portion (222) perpendicularly connected to the first flat portion (221), and a second flat portion (223) perpendicularly connected to the bent portion (222) and extending in the opposite direction to the cylindrical portion (21). The first flat portion (221) is located inside the ceramic tube (1), and the inner side of the bent portion (222) is in close contact with the opening of the ceramic tube (1). The second flat portion (223) is located at the port plane (10).

4. A robust tubular fuse according to claim 1, characterized in that: The fuse element (2) is provided with a middle part for improving product I 2 T-splitting capacity of the solder ball (20).

5. A robust tubular fuse according to claim 1, characterized in that: The port plane (10) has a shallow opening design.

6. A robust tubular fuse according to claim 1, characterized in that: The filler (4) is made of quartz sand.

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