Contactor with Insulation Laminate for ESD Protection
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Solution Overview
Problem
Electronic devices with metal casings are prone to electrostatic discharge (ESD) voltages, which can damage internal circuits and pose a risk of electric shock to users, especially when using non-genuine or faulty chargers.
Innovation Solution
A contactor with an electric shock prevention part that includes a laminate with insulation sheets and an ESD protection part, which bypasses ESD voltage to the ground terminal and blocks electric shock voltage below the discharge starting voltage, preventing damage to internal circuits and user safety.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a metal case is used for the electronic device, then the elegance and durability of the device are improved, but the risk of electric shock to users and damage to internal circuits increases due to ESD voltage and shock current transmission
Solution Approach 1:
The patent introduces a contactor as an intermediary component between the metal case and internal circuits. The contactor includes a contact part connected to the metal case and an electric shock prevention part that acts as a mediator to block harmful ESD voltage and shock current while allowing safe current transmission, thus protecting both internal circuits and users without compromising the metal case structure
Solution Approach 2:
The contactor is segmented into distinct functional parts: a contact part for electrical connection and an electric shock prevention part with insulation sheets and external electrodes. This segmentation allows the device to separately handle normal current transmission and ESD protection functions, enabling the metal case to maintain its protective role while the contactor provides specialized electrical safety
2Strength
If a metal case is used for the electronic device, then the elegance and durability of the device are improved, but the internal circuits may be damaged by ESD voltage introduced through the external metal case
Solution Approach 1:
The electric shock prevention part serves as a mediator between the metal case and internal circuits. It includes multiple insulation sheets laminated between the contact part and internal circuits, along with external electrodes that extend to block ESD voltage transmission, thereby protecting internal circuits while maintaining the metal case's structural integrity
Solution Approach 2:
The contactor is installed in advance within the metal case structure, positioned between the external metal case and internal circuits. The insulation sheets and electric shock prevention part are pre-configured to cushion against potential ESD voltage and shock current before they can reach and damage the internal circuits
3Object-affected harmful factors
If insulation sheets are laminated between the contact part and internal circuits, then electric shock prevention is improved, but the device complexity increases due to the additional electric shock prevention part with laminate and external electrodes
Solution Approach 1:
The contactor merges multiple functions into a single integrated component: electrical connection (contact part), ESD voltage blocking (insulation sheets), and ground path provision (external electrodes). This consolidation achieves comprehensive electric shock prevention without requiring separate components for each function, thereby limiting the increase in device complexity
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Effectively prevents internal circuit damage and user electrical shock by redirecting ESD voltage and blocking electric shock voltage, ensuring safe operation and device integrity.
Implementation Method 1
a laminate in which a plurality of insulation sheets are vertically laminated between the internal circuit and the conductor
Implementation Method 2
an ESD protection part, which bypasses ESD voltage to the ground terminal and blocks electric shock voltage below the discharge starting voltage
Data Source
AI summary
Provided is a contactor disposed on a conductor coming into contact with a user of an electronic device and an internal circuit. The contactor includes a contact part and an electric shock prevention part, which are disposed to face each other, and, of which at least portions respectively come into contact with the conductor and the internal circuit, wherein the electric shock prevention part includes a laminate in which a plurality of insulation sheets are vertically laminated between the internal circuit and the conductor and an external electrode disposed on a side surface of the laminate, and at least one portion of the external electrode extends to one surface of the laminate and is connected to a ground terminal or the conductor, and at least the other portion extends to the other surface of the laminate to come into contact with the contact part.