Electronic Control Device Adhesive Housing Vibration
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Solution Overview
Problem
Conventional electronic control devices face challenges in achieving adequate vibration resistance without incurring high costs, as screw-fastening methods require additional parts and processes, while claw-fixing methods are prone to unfastening under external forces.
Innovation Solution
An electronic control device design featuring a housing with claws that securely fix an electronic circuit board using a fixing groove and adhesive, ensuring the board is tightly sealed and resistant to vibrations and impacts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If screw-fastening method is used to rigidly connect the printed board to the housing, then vibration resistance is improved, but device complexity and manufacturing cost increase due to additional screws and tapping processes
Solution Approach 1:
The invention extracts and eliminates the screws and tapping processes from the fastening system. Instead of using mechanical fasteners, the printed board is directly bonded to the housing using adhesive applied to the bonding surfaces of the housing, thereby removing the complex fastening components while maintaining vibration resistance.
Solution Approach 2:
The invention replaces the mechanical fastening system (screws and tapped holes) with a chemical bonding system (adhesive). The adhesive is applied to the bonding surfaces of the housing and bonds the printed board directly to the housing, substituting mechanical connection with chemical bonding to eliminate complex fastening structures.
2Device complexity
If claw-fixing method is used to fix the printed board to the housing, then device complexity is reduced, but vibration resistance deteriorates as claws may open under external force
Solution Approach 1:
The invention merges the simplicity of the claw-fixing structure with the reliability of adhesive bonding. The adhesive is applied to the bonding surfaces of the housing, creating a permanent bond between the housing and printed board that combines the structural simplicity of claw-fixing with the vibration resistance of adhesive bonding.
Solution Approach 2:
The adhesive is applied in advance to the bonding surfaces of the housing before the printed board is installed. This preliminary application of adhesive ensures that when the printed board is mounted, it is immediately bonded to the housing, preventing any movement or opening under external forces before the bond is established.
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
The solution effectively improves vibration resistance and impact resistance by securely fastening the circuit board with adhesive, preventing unfastening even under significant external forces, thus enhancing the device's stability compared to conventional methods.
Implementation Method 1
adhesive which is filled on the rear side of the claws via the fixing groove and the cutout
Implementation Method 2
the printed board is close-fitted by elastically deforming a claw portion
Data Source
AI summary
An electronic control device includes: an electronic circuit board on which an electronic component is packaged; and a housing in which the electronic circuit board is contained, and which is composed of a case and a base. The electronic control device includes: a plurality of claws which is provided in the case of the housing and fixes the electronic circuit board; a fixing groove which is formed in the case on the rear side of the claws, and into which a peripheral edge portion of the base is close-fitted; a cutout which is formed on the rear side of the claws of the housing and is communicated with the fixing groove; and adhesive which is filled on the rear side of the claws via the fixing groove and the cutout.