Automobile Window Screen Frame to Suppress Floating and Wind Noise
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Solution Overview
Problem
Existing window screens for automobiles cause floating and wind noise issues when driven due to wind pressure, as they are not adequately secured to the vehicle's frame.
Innovation Solution
A window screen design featuring a frame body with rail members of specific thickness and width, curved corners, and fixing stays with a cushioning material, attached with an interval that prevents floating and wind noise, while allowing ventilation and drainage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the window screen is attached to the outside of the window frame in a protruding manner, then the window screen can be securely attached and allow the automobile to be driven, but wind noise is caused by wind pressure
Solution Approach 1:
The rail member is designed with a curved outer surface having a radius of curvature of 2.5 mm or more and 10 mm or less. This curvature allows wind to flow smoothly over the surface, reducing turbulence and wind noise generation while maintaining the protruding attachment configuration that provides secure mounting.
2Speed
If the automobile speed increases, then driving performance is improved, but floating or rattling of the window screen is caused by wind pressure
Solution Approach 1:
The curved outer surface with optimized radius of curvature reduces wind pressure fluctuations and prevents vortex formation that would cause floating or rattling at high speeds.
Solution Approach 2:
The thickness and width dimensions of the rail member are specifically controlled (thickness: 10-20 mm, width: 20-50 mm) to provide adequate structural rigidity that resists deformation under wind pressure at various speeds, preventing floating and rattling.
3Strength
If the window screen is designed with adequate thickness and width dimensions, then structural strength is improved, but the window screen may cause wind noise
Solution Approach 1:
The curved outer surface design allows the rail member to maintain sufficient thickness (10-20 mm) and width (20-50 mm) for structural strength while the curvature itself reduces wind noise by enabling smooth airflow.
Data Source
AI summary
Automobile window screen allowing the automobile to be driven with the screen attached outside an automobile window frame and capable of suppressing floating or wind noise even under pressure while driving, having a frame body that substantially conforms to the window frame, the frame body including: a rail member constituting a straight portion; a corner member coupled to the rail member; and a fixing stay that is attached to the rail member with an attachment member and that is to be inserted between the window frame and glass, wherein the rail member has a thickness 10 mm or more and 20 mm or less and a width of 20 mm or more and 50 mm or less, and the attachment member is attached in plurality with an interval of 50 mm or more and 250 mm or less on one of the rail member.