Camera Housing Air Ejection Port Design
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Solution Overview
Problem
Conventional camera housings fail to prevent dust and mist from adhering to the lens, leading to blurred images and potential camera device breakdowns, due to issues with air flow speed and uniformity, and require frequent maintenance.
Innovation Solution
A camera housing design with a front portion having an opening and a rear or side portion with an air ejection port, where the diameter of the opening is 0.9 times or less than the front portion, and the area of the air ejection port is 0.1 times or more than the opening, ensuring uniform air flow and preventing dust and mist from entering.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If air ejection port is provided on the wall of camera housing at a position behind the camera to prevent dust and mist from adhering to the lens, then dust and mist are prevented from adhering to the lens, but the camera device vibrates due to high flow speed of ejected air
Solution Approach 1:
The patent changes the geometric parameters of the opening and air ejection port to optimize air flow characteristics. Specifically, the diameter of the inscribed circle of the opening is set to 0.9 times or less the diameter of the inscribed circle of the front portion, and the area of the air ejection port is set to 0.1 times or more the area of the opening, which controls the air flow speed to prevent both dust adhesion and camera vibration
2Stability of the object's composition
If flow speed of air ejected from the opening is reduced to prevent camera vibration, then camera vibration is reduced, but dust and mist get inside the housing and adhere to the lens surface
Solution Approach 1:
The patent optimizes the parameters of the opening diameter relative to the front portion and the air ejection port area to achieve a balance where the air flow speed is sufficient to prevent dust and mist adhesion while being low enough to avoid camera vibration. The specific parameter ranges (opening diameter ≤ 0.9 × front portion diameter, air ejection port area ≥ 0.1 × opening area) define the optimal operating window
3Stability of the object's composition
If air ejection port is provided at a position where air flow does not directly hit the back of camera device, then camera vibration is reduced, but the ejection speed at the opening becomes non-uniform causing dust and mist to enter the housing
Solution Approach 1:
The patent addresses the non-uniform air flow issue by optimizing the geometric parameters of the opening and air ejection port. The specific ratio relationships (opening diameter ≤ 0.9 × front portion diameter, air ejection port area ≥ 0.1 × opening area) ensure that even when the air ejection port is positioned to avoid direct impact on the camera, the air flow remains sufficiently uniform to prevent dust and mist infiltration
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 design maintains clear images by preventing dust and mist from adhering to the camera lens, reducing camera vibrations, and eliminating the need for frequent maintenance, allowing continuous use in dusty or misty environments.
Implementation Method 1
air ejected from the air ejection port is ejected from the opening to the outside of the camera housing, thereby preventing dust and the like from adhering to the camera lens
Data Source
AI summary
A camera housing is provided which prevents dust and mist from adhering to a camera lens and which makes it possible to secure clear imaging despite continuous use. The camera housing comprises a front portion provided at a position opposite of the lens surface of an internally provided camera lens, a rear portion provided at a position opposite of the front portion, and another side portion. The front portion has an opening, and the rear portion and/or side portion has an air ejection port. The diameter of the inscribed circle of the opening is 0.9 time or less the diameter of the inscribed circle of the front portion, and the area of the air ejection port is 0.1 time or more the area of the opening.