Flat Lens Sensor Housing Reinforcement for Impact Resistance
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Solution Overview
Problem
Flat lens sensor or detector devices often fail to meet the 0.3 joule resistance test, leading to loss of water and dust resistance and non-compliance with IP 54 standards when impacted, making them unsuitable for outdoor use.
Innovation Solution
A sensor or detector device with a housing assembly featuring a flat lens and a reinforcement structure integrated with the front housing, which includes an annular ring and ribs or arms to protect the lens from impact, ensuring it remains functional and resistant to fluids and dust.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If a flat lens is used in the sensor device, then the device can be made compact and aesthetically pleasing, but the lens becomes vulnerable to impact damage and fails to meet IP 54 standards
Solution Approach 1:
The patent applies beforehand cushioning by providing a recess in the front housing that receives and cushions the flat lens, along with a reinforcement structure attached to the inner periphery of the front housing. This reinforcement structure abuts with the lens to provide protective support before impact occurs, preventing the lens from breaking during impact tests while maintaining the flat lens design for compactness and aesthetics.
2Length of moving object
If the lens is made thinner and flatter for modern design, then the device profile is reduced, but the lens strength decreases making it susceptible to bursting under impact
Solution Approach 1:
The patent applies local quality by creating a reinforcement structure with specific local properties - the reinforcement structure is attached to the inner periphery of the front housing and abuts with the lens at specific locations. This provides localized strength enhancement exactly where needed to prevent lens bursting, while maintaining the overall thin and flat lens design for reduced device profile.
3Ease of manufacture
If a simple housing structure is used, then manufacturing is easier and cost is reduced, but the housing cannot protect the lens from impact damage
Solution Approach 1:
The patent applies merging by integrating the reinforcement structure as part of the housing assembly - the reinforcement structure is attached to the inner periphery of the front housing, combining the protective function with the existing housing structure. This provides impact protection without requiring a completely separate or complex housing design, maintaining ease of manufacture while protecting against harmful impact factors.
Data Source
Figure 1
Figure 2
Figure 3A~3B
AI summary
The present invention provides a sensor or detector device (100). The sensor or detector device comprises a flat lens (110) and a housing assembly (102) comprising a front housing (104) with a wall (106) defining an opening (108), and being adapted for removably receiving the flat lens (110), and a back housing (112) removably attached to the front housing (104). The front housing (104) comprises a reinforcement structure (116, 116A, 116B, 400, 400A, 400B) for protecting the flat lens (110) from being damaged. The reinforcement structure (116, 116A, 116B, 400, 400A, 400B) is attached to an inner periphery (118) of the wall (106) of the front housing (104). The reinforcement structure (116, 116A, 116B, 400, 400A, 400B) and the flat lens (110) are attached to the front housing (104) such that the reinforcement structure (116, 116A, 116B, 400, 400A, 400B) abuts with the inner surface (120) of the flat lens (110).flat lens