Fuse protector

Abstract

The invention relates to a fuse protector which solves the problem that manufacturing cost is increased since except for rivets and screws, all parts, such as wiring terminals, outer end caps and inner end caps, of an A-type fuse protector and a C-type fuse protector in traditional standards are involved in electric conduction and must be made of copper materials. The fuse protector comprises an insulation tube, a fuse link is arranged inside the insulation tube, two ends of the fuse link are connected with wiring terminals, wiring ends of the wiring terminals extend out of the insulation tube, positioning pads used for fixing the wiring terminals are respectively arranged on the corresponding wiring terminals in a sleeved manner and fit with tube openings of the insulation tube, and outer end caps compressing the positioning pads and sealing the tube openings of the insulation tube are arranged on the insulation tube. The fuse protector is totally different from current various domestic and foreign fuse protectors in construction and structure principles and has the advantages of ingenious and novel design concept, wide and practical promotional significance, simplicity and efficient economic benefit and universal value.

Description

technical field [0001] The invention belongs to the technical field of electrical structures and relates to a fuse. Background technique [0002] The standardized product types of low-voltage fuses announced by the national standard GB / T13539.4-2009 and the international standard IEC60269-4. 2006 are currently the structural forms widely used in the global fuse industry. This type of traditional standard fuse usually has two structures, one is a type A fuse with terminals at both ends, see figure 1 and figure 2 , for these two types of A-type fuses, the terminals must be riveted and welded with the outer cap first to form a combined outer end cap, and then extruded and packaged with the inner end cap with a preset fuse at one end of the insulating tube, and then turned around and filled with quartz sand. Press fit the other outer end cap. This kind of structure not only makes the process of making the riveted outer end cap complicated and labor-intensive, but also must e...

AI Technical Summary

Problems solved by technology

This kind of structure not only makes the process of making the riveted outer end cap complicated and labor-intensive, but also must ensure that the two terminals that are not related to each other are kept straight and cannot be skewed during press-fitting; in addition, the two fuses of this type of fuse When the outer end cap and the inner end caps at both ends of the tube body are installed separately, it is necessary to clamp the preset fuse on the inner cap together to ensure good electrical performance of the product. If one end is not pressed tightly or the fuse is damaged, Or if one of the outer end caps is skewed during press-fitting, the entire product will be scrapped due to poor internal conductive contact or mutual misalignment of the terminals

[0003]Another standardized structure of type C fuse with terminals at both ends, after the two terminals welded with the fuse piece are inserted into the insulating tube as a whole , respectively drill holes at both ends of the insulating tube to enter the inside of the terminal, and then connect and fix the two with rivets or screws, see Figure 3, the production process must rely on electric drills, positioning devices and additional fasteners, the operation is also cumbersome and the efficiency is not high, especially the insulating tube of the C-type fuse The body is limited to resin-synthesized organic materials that can be drilled. If the ceramic tube body is used, drilling, tapping and product assembly cannot be completed.

[0004] In summary, except for rivets or screws, the traditional standard A-type and C-type fuses have other parts such as terminals, outer end caps, inner end caps, etc. Both participate in the conduction work and must be made of copper, which increases the manufacturing cost

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