Electronic element sheath

Abstract

The invention relates to an electronic element sheath which has a stereo shape consistent with the shape of an internal electronic element and can contain the electronic element. An opening is arranged at the lower end surface of the sheath, a hole used for conteracting thrust is arranged on the upper end surface, a distance is arranged between the edge of the hole and the side surface, the frontsurface and the back surface of the sheath are both a plane, the upper end of each plane is in an arc shape, the lower end of each plane is a straight edge converging inwards, and the side surface ofthe sheath is transitive with the arc lines of the front surface and the back surface and well integrated with the arc lines of the front surface and the back surface. The sheath is made of soft plastics which do not shrink after being heated. Because the hole is arranged on the upper end surface, and the thrust in an opposite direction is generated after gas is jetted out from the hole, counteraction of force is realized to enable the sheath not to fall off from the electronic element. For being formed in the way of injection molding by adopting the flexible soft plastics, the sheath can adsorb the kinetic energy generated in the process of short circuit, breakdown and brusting of the electronic element without rupturing, prevent electric arcs from leaking, achieve the effects of arc quenching and flame retardancy, prevent a fire caused by strong electric arcs generated by breaking down the electronic element and has the advantages of conciseness, convenience, beauty, practicability and low cost.

Description

(1) Technical field: [0001] The invention relates to a protection device for electronic components, in particular to a sheath with arc extinguishing and flame retardant function on the casing of the electronic component. (two) background technology: [0002] Electronic components such as varistors and ceramic capacitors are often broken down when the surge energy exceeds the withstand capacity. When a breakdown occurs, the electronic component will explode and produce a strong arc at the breakdown. The fragments produced by the explosion fly around, and the strong arc will ignite the combustible substances around the electronic components, causing the electronic devices to catch fire and causing major accidents. For this purpose, it is necessary to use a protection device on the electronic component housing. Patent No. CN 2870386Y authorized and announced by the State Intellectual Property Office of China on February 14, 2007 discloses a protective cover for electronic com...

AI Technical Summary

Problems solved by technology

The deficiencies of this protective cover are: the first is that although the flat sheath and the three-dimensional electronic component can be put on, it is difficult to fit tightly; the second is that the upper end of the protective cover is closed and only the lower end side has an opening. The strong airflow generated when being punctured will send the protective cover flying

Even using fireproof glue to fix the protective cover on the circuit board can not completely solve the problem

And the operation is cumbersome, increasing the cost

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