Electronic Relay With PCB Shielding and Resin Sealing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Mechanical relays are large in size, generate operation noise, and require significant installation space due to their mechanical operation, which is not suitable for compact designs and noise-sensitive applications.
Innovation Solution
An electronic relay using a printed circuit board with a switching function, where the printed circuit board is mounted in a housing with an open lateral side and a lower cover to minimize size, reduce noise, and enhance waterproofing, with a fixing resin injected between the board and the cover to secure components and prevent water penetration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a mechanical relay using a coil and moving iron is used, then the switching function is achieved, but the size becomes large and installation space increases
Solution Approach 1:
The patent replaces the mechanical relay system (coil, moving iron, spring) with an electronic switching system using a printed circuit board with electronic components. This substitution eliminates the need for mechanical moving parts while achieving the same switching function, thereby dramatically reducing the installation space and size of the relay device.
Solution Approach 2:
The patent integrates multiple functions into a single printed circuit board assembly. The PCB combines the switching function, terminal connections, and mounting structure into one compact unit, eliminating the need for separate mechanical components and reducing overall device size and installation space.
2Reliability
If a mechanical relay with moving iron and spring is used, then the switching operation is achieved, but operation noise is generated
Solution Approach 1:
The patent eliminates the mechanical moving iron and spring components that generate operation noise during switching. By replacing them with an electronic switching system on a PCB, the mechanical noise inherent in traditional relays is completely removed while maintaining the switching operation functionality.
3Area of stationary object
If the relay size is reduced to minimize product area, then the installation area is minimized, but heat dissipation becomes difficult
Solution Approach 1:
The patent applies local quality by providing dedicated heat dissipation structures (such as heat sinks or thermally conductive pathways) specifically at the locations where electronic components generate heat on the PCB. This localized approach allows effective heat management in the compact design without requiring the entire device to be large for heat dissipation purposes.
4Reliability
If the printed circuit board is installed within a closed housing, then waterproofing is improved, but heat dissipation is reduced
Solution Approach 1:
The patent employs a housing design that selectively encloses the PCB assembly to provide waterproofing while incorporating openings or vents that allow heat to escape. The housing acts as a flexible barrier that can be configured to block water while permitting thermal energy to dissipate, resolving the conflict between sealing for waterproofing and opening for heat dissipation.
Data Source
AI summary
An electronic relay includes: a housing having an interior space therein and a lateral side and a lower side of which are opened, a board installation part being formed along a periphery of the opened side of the housing; a printed circuit board a periphery of which is inserted into and installed in the board installation part of the housing, for shielding the opened side of the housing and performing a switching function; a lower cover for shielding a lower side of the housing, one side edge of the printed circuit board being fixed to the lower cover; and terminals ends of which are electrically connected to the printed circuit board and opposite ends of which pass through the lower cover to protrude to the outside.