electronic protection device

Abstract

An electronic protection device is provided. The electronic protection device is coupled to a metal housing and a grounding terminal of a printed circuit board of an electric apparatus. The electronic protection device includes a flexible printed circuit board, a first conductive portion, a second conductive portion, and an electro-static discharge (ESD) protection element. The flexible printed circuit board includes a first surface. The first conductive portion is located on the first surface and is coupled to the metal housing. The second conductive portion is located on the first surface and is coupled to the grounding terminal of the printed circuit board. An isolating gap is formed between the second conductive portion and the first conductive portion. Two ends of the electro-static discharge protection element are respectively coupled to the first conductive portion and the second conductive portion.

Description

technical field [0001] The invention relates to an electronic protection device. Background technique [0002] Static electricity is a physical phenomenon that exists on the surface of objects or human bodies, and is a phenomenon that occurs when positive and negative charges are locally unbalanced. There are many ways to generate static electricity, such as contact or friction. In addition, static electricity has the characteristics of high voltage, low power, small current and short acting time. For electronic products, when the weather is dry, when the human body touches the metal case of the electronic product, it may be caused by the potential between the human body and the metal case. Static electricity is generated due to poor voltage, and static electricity can be transmitted to other electronic components (such as the motherboard) inside the electronic product through the metal shell of the electronic product. When the potential difference is too large, the electro...

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Problems solved by technology

In addition, static electricity has the characteristics of high voltage, low power, small current and short acting time. For electronic products, when the weather is dry, when the human body touches the metal case of the electronic product, it may be caused by the potential between the human body and the metal case. Static electricity is generated due to poor voltage. Static electricity can be transmitted to other electronic parts (such as the main board) inside the electronic product through the metal shell of the electronic product. When the potential difference is too large, it may cause damage to the electronic parts

[0003] On the other hand, electronic products with metal casings may also cause leakage current due to internal electronic parts touching the metal casing. For example, errors in the assembly of electronic parts and metal casings or displacements caused by vibration may cause electronic parts to contact the metal casing

Therefore, when the metal casing has leakage current generated by electronic parts, the human body will feel an electric shock when it touches the metal casing, which may cause harm to the human body in severe cases.

[0004] Generally speaking, the easiest way for electronic products to protect against static electricity and leakage current is to avoid contact or conduction between the metal shell and electronic parts. The distance between them will become smaller and smaller, so it is not easy for manufacturers to make electronic products with metal casings while maintaining the functions of static electricity and leakage current protection

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