A chip type protection element and its mass production method

Abstract

The invention discloses a chip type protecting element and a batch manufacturing method thereof. The element comprises an insulation base plate, a metal melt body, end electrodes and a protecting layer. A through hole is formed in the middle of the insulation base plate, and the opening direction of the through hole is perpendicular to the end electrodes. Grooves connected with the through hole are formed in the upper surface and the lower surface of the insulation base plate. The metal melt body penetrates in from a groove in one side of the insulation base plate, penetrates through the through hole in the opposite-angle direction and then penetrates out from a groove in the other side. The two ends of the metal melt body are fixed in the grooves through conducting resin and form electric connecting with the end electrodes at the two ends of the insulation base plate. The protecting layer is formed between the end electrodes. The design that the metal melt body forms a suspension melt wire structure by vertical opposite angle wire penetrating is used, the produced chip type protecting element has the advantages of being high in breaking capacity and high in reliability, two inherent defects of a traditional fuse structure are removed, structure design is simple, cost is low, and batch production can be achieved easily.

Description

technical field [0001] The invention belongs to the technical field of electrical components, and relates to a chip-type protection component, in particular to a high breaking capacity and high reliability overcurrent protection component with a vertical diagonal wire threading structure and a method for manufacturing the protection component. Background technique [0002] The protection element is generally connected in series in the circuit. When an abnormal phenomenon such as overcurrent or overheating occurs in the circuit, it will immediately cut off the circuit and play a protective role to prevent further expansion of the fault. Traditional protective components mainly have two structural forms, one is to install the fuse body horizontally through the wire and hang it in the tubular insulating shell, and use the end cap to seal the two ends of the tube body and provide the function of electrical connection with the internal fuse and surface welding The other is to for...

AI Technical Summary

Problems solved by technology

Both of these two traditional protective element structures have two similar inherent defects: their end electrodes form a facing electrode structure, which is easy to form a continuous arc when breaking under high voltage; after the fuse is broken, its metal vapor It is easy to deposit on the surface of the insulating shell or substrate, resulting in a decrease in the insulation resistance of the product after breaking, and in serious cases, it may not be disconnected for a long time

This kind of fuse structure design reduces the impact of the end facing the electrode, and also forms the structural design of the floating fuse, which has a relatively large improvement in the breaking capacity and reliability of the surface mount fuse, but the fuse's The structural design is complex, the requirements for assembly equipment are high, the cost is high, and it is difficult to achieve mass production

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