Vehicular Lens Module Holding Mechanism for Glass and Resin Alignment
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Solution Overview
Problem
Existing lens modules for vehicular imaging devices face challenges in properly aligning and holding glass and resin lenses without causing wobbling or deformation, especially under varying temperature conditions, as strong holding of glass lenses can lead to resin lenses creeping or becoming deformed.
Innovation Solution
A lens module design that includes a holding mechanism with a first press member to apply pressure to the glass lenses through a second lens barrel, while a second press member applies pressure to the resin lenses within the barrel, allowing for independent adjustment of pressing forces to prevent deformation and wobbling, using a combination of mechanical and adhesive methods.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If strong pressing force is applied to glass lenses to prevent wobbling, then glass lens alignment is improved, but resin lenses become deformed or creep
Solution Approach 1:
The holding mechanism is divided into separate first and second press members, each independently controlling pressing force for glass and resin lenses respectively. This segmentation allows differential pressure application - strong force on glass lenses for alignment while gentle force on resin lenses to prevent deformation.
Solution Approach 2:
Different pressing forces are applied to different lens types based on their material properties. Glass lenses receive stronger pressing force due to their rigidity, while resin lenses receive gentler force to accommodate their softer, more deformable nature. This local quality approach optimizes alignment for each lens type without causing harm to others.
2Device complexity
If unified pressing force is applied to all lenses, then alignment process is simplified, but both glass and resin lenses cannot be optimally held
Solution Approach 1:
The holding mechanism uses separate first and second press members for glass and resin lenses, enabling independent force control. This segmentation increases structural complexity but dramatically improves alignment precision by allowing optimized pressing force for each lens type's material characteristics.
Solution Approach 2:
The system changes the pressing force parameter differently for glass and resin lenses. By adjusting the force parameter according to each lens type's material properties (glass being harder and more rigid, resin being softer and more deformable), the system achieves optimal alignment precision for all lenses simultaneously.
3Force
If resin lenses are directly pressed with strong force, then holding force is sufficient, but resin lenses creep or deform
Solution Approach 1:
The second press member applies gentler pressing force specifically to resin lenses, matching their softer material properties. This localized quality adjustment prevents excessive force from causing creep or deformation while still providing sufficient holding force to maintain position and alignment.
4Stability of the object's composition
If glass lenses are held with gentle force, then resin lenses remain undeformed, but glass lenses wobble or misalign
Solution Approach 1:
The first press member is dedicated to pressing glass lenses with stronger force, while the second press member handles resin lenses with gentler force. This functional segmentation allows the glass lens pressing force to be optimized for preventing wobble and ensuring alignment without concern for resin lens deformation.
Data Source
AI summary
In a lens module, a first lens barrel has opposing first and second ends and an optical axis. A glass lens is disposed in the first lens barrel, and a resin lens is disposed in the first lens barrel and is arranged to be closer to the second end than the glass lens is. A second lens barrel is disposed in the first lens barrel to surround the at least one resin lens. A holding mechanism applies pressing force to the at least one glass lens and the second lens barrel in a direction of the optical axis to perform pressure holding of the at least one glass lens and the second lens barrel in a direction of the optical axis. The holding mechanism holds the at least one resin lens while preventing the pressing force from being directly applied to the at least one resin lens.