Camera Apparatus Vent Hole Design for Fogging Prevention
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Solution Overview
Problem
Fogging occurs in the enclosed space between a transparent member and a lens in vehicle-mounted cameras, leading to imaging issues.
Innovation Solution
A camera apparatus with a transparent member, a lens, a closing body to seal the space, and a vent hole to vent the space, which can be directed towards the lower side or the vehicle interior, along with a cover body that includes ventilation holes to further prevent fogging and foreign substance ingress.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an enclosed space is provided between the lens cover and the lens, then the lens is protected, but fogging occurs in the enclosed space
Solution Approach 1:
The closing body incorporates a vent hole that allows controlled ventilation of the enclosed space between the lens cover and lens. This porous/open structure prevents fogging by enabling moisture and vapor to escape while maintaining protective enclosure, directly resolving the contradiction between sealing for protection and venting to prevent condensation.
2Reliability
If a cover body is added to cover the camera, then the camera is protected, but the space ventilation becomes more complex
Solution Approach 1:
The vent hole for the enclosed space and the ventilation hole for the cover body interior are merged into a single integrated ventilation pathway. The closing body's vent hole serves dual purposes: ventilating the lens enclosure and the cover body interior, thereby reducing structural complexity while maintaining comprehensive protection and ventilation functions.
Solution Approach 2:
The vent hole in the closing body performs multiple functions simultaneously: it protects the lens enclosure, ventilates the enclosed space to prevent fogging, and connects to the cover body interior for its ventilation. This multi-functional design eliminates the need for separate ventilation structures, reducing overall device complexity while achieving camera protection.
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 suppresses fogging and foreign substance ingress, ensuring clear imaging without the need for additional components, reducing complexity and cost.
Implementation Method 1
the vent hole vents the space toward a lower side of the camera apparatus
Implementation Method 2
the ventilation hole vents the interior of the cover body toward the lower side of the camera apparatus
Data Source
AI summary
There is provided a camera apparatus, including: a transparent member that transmits light; a camera, at which a lens is provided, the camera performing imaging via the transparent member and the lens; a closing body that closes off a space between the transparent member and the lens; and a vent hole that vents the space.