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Protecting element

A technology for protecting components and melts, applied to electrical components, emergency protection devices, circuits, etc., can solve problems such as temperature rise and expansion, melt is easy to fuse, and performance improvement is limited, so as to improve breaking performance, avoid pollution, reduce The effect of destruction

Active Publication Date: 2015-05-06
NANJING SART SCI & TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Existing protection elements have various structures. Generally speaking, they all have the basic structures of insulator, melt and electrodes. When the protection element is subjected to an instantaneous high current impact, the internal temperature of the product will rise and expand sharply, and the melt is easy to fuse and break. Quickly break through the protective layer of the insulator and spray out, there will be burning, explosion and other phenomena, polluting other components
Based on this, existing products also have a structure that improves the breaking capacity. For example, the protective element of the tubular structure has a cavity around the melt, and the cavity is usually filled with silicon dioxide or inert gas to improve the breaking capacity, or Microholes are set on the shell for pressure relief, but its performance improvement is limited and the effect is not ideal
In addition, due to the small size of the chip protection element of the existing structure, its breaking performance and anti-surge ability are poor

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] like figure 1The shown tubular structure protection element includes a tubular insulating casing 101, which has a cavity 102, and the fusible part of the melt 104 is suspended (the suspension referred to in the present invention means that the melt is not connected to the cavity except at both ends. The inner wall is in contact, therefore, even if the cavity is filled with other materials that are in contact with the melt, it should be regarded as the melt is suspended) Set in the cavity, electrodes are provided at both ends of the shell, and the electrodes can be as follows figure 1 In the metal end cap 103 shown, or other conventional structures, a stable electrical connection is formed between the metal end cap 103 and the melt 104 through soldering 105 . It must be pointed out that soldering 105 is not necessary, and those skilled in the art can also use glue to stick the melt 104 on the end cap 103, or clamp the melt through the tight fit between the end cap 103 an...

Embodiment 2

[0051] like Figure 8 ~ Figure 11 The shown multi-layer structure protection element includes an upper insulating layer 201, an intermediate insulating layer 202 and a lower insulating layer 203 from top to bottom, and electrodes 204 are provided at both ends of the upper, middle and lower insulating layers, and the electrodes are electrically connected to the melt 208 . Specifically, the electrodes include terminal electrodes located at both ends of each insulating layer and surface electrodes located on the upper surface of the upper insulating layer and / or the lower surface of the upper insulating layer, and the terminal electrodes and the surface electrodes are electrically connected. The intermediate insulating layer is arranged between the upper insulating layer and the lower insulating layer, the middle insulating layer is provided with a groove 205, and the middle of the intermediate insulating layer is longitudinally opened with a through hole 206, the wall of the thr...

Embodiment 3

[0055] like Figure 12 , Figure 13 , Figure 14 , Figure 15 The chip protection element shown includes an insulating substrate 305, an electrode part 301, a melt 302 and an insulating protective layer 304. The electrode part 301 is formed at both ends of the insulating substrate, and the insulating protective layer 304 covers between the electrodes at both ends of the insulating substrate. region, the electrode portion 301 can be exposed. Specifically, the electrode part 301 not only covers the two ends of the insulating substrate 305 but also extends to the front and back of the insulating substrate 305 (the present invention refers to Figure 12 One side of the insulating substrate shown in the above is the front side, and the opposite side is the back side), we will refer to the electrode part formed on the front side of the insulating substrate 305 as the positive electrode 3011, and the electrode part formed on the back side of the insulating substrate 305 as the bac...

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PUM

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Abstract

The invention discloses a protecting element which comprises an insulating body, a melt and electrodes. The insulating body covers the meltable part of the melt. The electrodes are disposed at two ends of the insulating body. Two ends of the melt are electrically connected with the electrodes. A wave absorbing structure is disposed around the melt in the insulating body and provided with a plurality of protrusions facing the melt. Distance is reserved between the wave absorbing structure and the melt. The protecting element has the advantages that the shape of the melt is improved, the wave absorbing structure which can resist impact is designed, energy waveforms can be destroyed, impact energy can be dissipated to the periphery to achieve wave (energy) absorbing, the breaking performance of the protecting element can be at least doubled by the wave absorbing structure, and the protecting element is simple in manufacturing process and suitable for batch production.

Description

technical field [0001] The invention belongs to the technical field of electrical protection components, and in particular relates to a protection component with improved breaking performance. Background technique [0002] Protection components are the last line of defense to protect the safety of electronic products, and their safety performance is extremely important. When designing a protection element, not only the compactness of the structure must be considered to ensure its overcurrent and short-circuit protection performance, but also the requirements for its breaking performance are becoming more and more stringent, and in long-term use, the protection element must also be able to withstand Frequent power on and off and the impact of surges such as indirect lightning, to maintain long-term stable and effective performance. [0003] Existing protection elements have various structures. Generally speaking, they all have the basic structures of insulator, melt and ...

Claims

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Application Information

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IPC IPC(8): H01H85/175
CPCH01H85/175H01H85/43
Inventor 南式荣杨漫雪张荣保
Owner NANJING SART SCI & TECH DEV
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