Lens Module Fixing Member Ultrasonic Welding
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Solution Overview
Problem
The existing camera module lens assembly faces issues with deformation of the bond between lenses due to external factors like dropping or vibrations, leading to changes in the distance between lenses and resulting in resolution defects.
Innovation Solution
A lens module design featuring a lens barrel with a through-hole accommodating a fixing member, where the fixing member's first end protrudes outward with a greater diameter than the through-hole, and is connected to the lens barrel and lenses using ultrasonic welding, ensuring secure fixation and minimizing deformation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If adhesive bonding is used to fix lenses to the lens barrel, then the assembly process is simple, but the bond deforms under external impacts causing lens displacement
Solution Approach 1:
The patent replaces the chemical bonding system (adhesive) with a mechanical fixing system. The fixing member includes a pressing portion that contacts the lens and a clamping portion that engages with the lens barrel, creating a mechanical interlock that prevents lens displacement under external impacts while maintaining assembly simplicity.
Solution Approach 2:
The patent changes the material parameter of the fixing member to have different rigidity in different directions. The pressing portion has high rigidity to resist impact forces, while the overall structure allows for easy assembly. This anisotropic rigidity design enables the fixing member to maintain bond stability without compromising ease of manufacture.
2Manufacturing precision
If a rigid fixing structure is used to prevent lens deformation, then focal length stability is improved, but the device complexity increases
Solution Approach 1:
The fixing member serves multiple functions simultaneously: it presses the lens against the support portion to prevent displacement, clamps onto the lens barrel through the clamping portion for secure fixation, and maintains the optical axis alignment. This multi-functionality achieves focal length stability without requiring multiple separate components, thus avoiding increased device complexity.
Solution Approach 2:
The patent merges the pressing function and the fixing function into a single integrated fixing member. The pressing portion and clamping portion are connected as one piece that simultaneously performs both functions, simplifying the overall structure while ensuring lens stability and focal length precision.
3Manufacturing precision
If adhesive bonding is used to assemble lenses, then initial positioning is accurate, but resolution defects occur due to bond deformation under vibration
Solution Approach 1:
The patent replaces the adhesive bonding system with a mechanical pressing and clamping system. The pressing portion maintains accurate lens positioning through continuous contact force, while the clamping portion prevents bond deformation under vibration by creating a rigid mechanical constraint that does not deform like adhesive bonds.
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 a constant distance between lenses, preventing focal length changes and reducing resolution defects, even under external impacts, by using a plastic fixing member that resists deformation compared to traditional adhesives.
Implementation Method 1
connected to the lens barrel and lenses using ultrasonic welding
Data Source
AI summary
A lens module is provided. The lens module includes a plurality of lenses disposed along an optical axis, a lens barrel configured to accommodate the plurality of lenses, and a fixing member configured to fix at least one of the plurality of lenses to the lens barrel. The lens barrel includes a through-hole which accommodates a portion of the fixing member, a first end of the fixing member protrudes outwardly of the through-hole, and a diameter of the first end of the fixing member is greater than a diameter of the through-hole.