Projection Lighting Module With Integral Seal Against Dust Ingress
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Solution Overview
Problem
Existing dust-proof structures in projector optical engines suffer from gaps due to assembly tolerances, leading to incomplete sealing and dust ingress, which affects the performance of heat-generating components.
Innovation Solution
A lighting module with an integrally formed elastic seal component that seals the joints between the housing and heat dissipation element, using multiple sealing parts to ensure complete sealing and prevent dust ingress.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If multiple dust-proof parts are arranged based on joint structure, then dust-proof coverage is improved, but assembly tolerance variations cause gaps between parts, reducing sealing effectiveness
Solution Approach 1:
The patent combines multiple separate dust-proof parts into a single integrally formed elastic seal component. This unified structure eliminates the gaps that occur between adjacent separate parts due to assembly tolerances, while maintaining comprehensive coverage of all joint areas. The integral design ensures continuous sealing across the entire perimeter where the cover meets the base.
Solution Approach 2:
The patent employs an elastic seal component made of flexible material that can deform to accommodate assembly tolerances and irregularities in the joint surfaces. This flexibility allows the seal to maintain continuous contact with both the cover and base, compensating for dimensional variations and preventing dust ingress despite manufacturing tolerances.
2Object-affected harmful factors
If dust-proof parts are added to seal gaps, then dust prevention is improved, but the complexity of the assembly structure increases
Solution Approach 1:
The patent reduces assembly complexity by merging multiple separate dust-proof parts into one integrally formed elastic seal component. This single component can be installed as one piece, eliminating the need to assemble and position multiple separate parts, thereby reducing the overall complexity of the assembly process while maintaining comprehensive dust-proof coverage.
3Ease of manufacture
If separate dust-proof parts are used, then manufacturing flexibility is improved, but tolerance variations prevent complete sealing
Solution Approach 1:
The patent uses an elastic seal component whose flexibility compensates for manufacturing precision issues. The elastic material can stretch and deform to accommodate tolerance variations in the joint surfaces, ensuring complete sealing even when manufacturing precision is limited. This approach maintains ease of manufacture while achieving the required sealing precision.
Solution Approach 2:
The patent changes the physical parameters of the sealing material by using elastic compounds with specific durometer values and cross-sectional dimensions. These parameter changes allow the seal to adapt to dimensional variations in the assembled parts, transforming a precision-dependent mechanical fit into a tolerance-friendly elastic deformation solution.
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 prevents dust from entering the accommodation space, ensuring optimal functioning of heat-generating components and maintaining efficient heat dissipation, enhancing the structural reliability of the projection device.
Implementation Method 1
an elastic seal component has a first sealing part, a second sealing part, and a third sealing part. The first sealing part seals the joint between the first housing and the second housing, the second sealing part seals the joint between the first housing and the heat dissipation element, the third sealing part seals the joint between the second housing and the heat dissipation element
Implementation Method 2
The heat dissipation element is assembled to and covers the opening; the heat-generating component connects to the heat dissipation element and the heat-generating component is disposed inside the accommodation space
Data Source
AI summary
A lighting module and a projection device are disclosed. The lighting module includes a first housing, a second housing, a heat dissipation element, an elastic seal including three sealing parts, and a heat-generating component. The first housing is assembled to the second housing, an opening is formed on a first side of the assembled first housing and the second housing. The heat dissipation element covers the opening, an accommodation space accommodation space surrounded by the heat dissipation element, the first housing and the second housing. A first sealing part seals the joint between the first housing and the second housing, a second sealing part seals the joint between the first housing and the heat dissipation element, and a third sealing part seals the joint between the second housing and the heat dissipation element. The first sealing part, the second sealing part and the third sealing part are integrally formed.