Insulating Plate for Electrical Device Short Circuit Suppression
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Solution Overview
Problem
Existing electrical devices face challenges in suppressing short circuits between the housing and the circuit board, which hinders size reduction and compliance with size restrictions of electronic components.
Innovation Solution
The electrical device incorporates a metallic main housing with an insulating plate and cover, which provides efficient insulation between the circuit board and the housing, allowing for a reduction in the gap necessary for insulation and enabling size reduction or compliance with size restrictions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the gap between the circuit board and metallic housing is increased to suppress short circuits, then electrical insulation is improved, but the device size increases
Solution Approach 1:
An insulating plate is introduced as an intermediary component between the circuit board and the metallic housing. This insulating plate provides the necessary electrical insulation while allowing the gap between the circuit board and housing to be minimized, thus resolving the contradiction between electrical insulation reliability and compact device size.
2Reliability
If the gap between the circuit board and metallic housing is increased to suppress short circuits, then short circuit suppression is improved, but the device complexity increases
Solution Approach 1:
The insulating plate is merged with the housing structure, where the insulating plate serves as both an electrical insulator and a structural component of the housing. This integration reduces the number of separate components and simplifies the overall structure while maintaining effective short circuit suppression.
3Reliability
If larger electronic components are used to accommodate increased insulation gaps, then electrical insulation is improved, but compliance with size restrictions is worsened
Solution Approach 1:
The insulating plate acts as a mediator that provides the required electrical insulation distance without requiring larger electronic components. By placing the insulating plate between the circuit board and housing, the insulation gap is achieved within the original component dimensions, maintaining compliance with size restrictions.
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
This configuration effectively suppresses short circuits, allows for a smaller device size, and complies with intrinsically safe explosion-proof structural standards by reducing the insulation gap and ensuring reliable electrical insulation.
Implementation Method 1
an insulating plate 6 having insulating properties is fixed to an inner surface of the main wall 12
Implementation Method 2
fixed to an inner surface of the main wall via an adhesive member
Data Source
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AI summary
Provided are an electrical device and a component for an electrical device that can efficiently suppress the occurrence of a short circuit between a housing and a circuit board. The electrical device includes a housing and a circuit board housed inside the housing. The housing includes a metallic main housing to be attached to an installation section and a sub-housing attached to the main housing. The main housing includes a main wall, extending along the circuit board with a gap between the main wall and the circuit board, and a board attachment portion having the circuit board attached thereto. An insulating plate having insulating properties is fixed to an inner surface of the main wall.