Camera Module Lens Barrel Mechanical Interlock
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Solution Overview
Problem
Camera modules in portable devices face issues with lens barrel and holder separation due to drop impacts or vibrations, and increased manufacturing costs from bonding processes.
Innovation Solution
A camera module design featuring a lens barrel with a coupling protrusion and a lens holder with a corresponding coupling groove and support portion, allowing for force-fitting assembly without bonding, which enhances coupling force and reduces manufacturing costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the lens barrel and holder are bonded by a bonding agent, then the coupling strength is improved, but the manufacturing cost increases and the bonding process time increases
Solution Approach 1:
The patent replaces the chemical bonding method (bonding agent) with a mechanical interlocking system consisting of coupling protrusions and coupling grooves. The protrusions fit into the grooves to create a mechanical connection that eliminates the need for bonding agents, thereby reducing manufacturing costs and process time while maintaining coupling strength.
Solution Approach 2:
The coupling interface is segmented into discrete protrusions and grooves rather than using a continuous bonding agent. This segmentation allows for easier assembly and disassembly while providing sufficient coupling strength through the distributed mechanical interlocking points.
2Strength
If the lens barrel and holder are bonded by a bonding agent, then the coupling strength is improved, but the bonding process time increases
Solution Approach 1:
The mechanical interlocking system eliminates the time-consuming bonding process entirely. The protrusions and grooves are designed to snap together or be inserted into each other without requiring bonding agents, significantly reducing assembly time while maintaining adequate coupling strength.
3Strength
If the lens barrel and holder are bonded by a bonding agent, then the coupling strength is improved, but the reliability decreases due to separation from drop impact or vibrations
Solution Approach 1:
The mechanical interlocking system provides superior resistance to separation forces compared to chemical bonding. The protrusions and grooves create a physical interlock that resists drop impacts and vibrations more effectively than bonding agents, thereby improving reliability.
Solution Approach 2:
The coupling protrusions are designed with curved surfaces that complement the groove geometry. This curvature allows for smooth engagement and distribution of forces during impact, enhancing the reliability of the connection under dynamic conditions.
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 design effectively reduces the separation risk of the lens barrel and holder, simplifies the manufacturing process, and decreases production costs by eliminating the need for bonding.
Implementation Method 1
the support portion of the lens holder elastically supports the lens barrel in an optical axis direction
Data Source
AI summary
A camera module is provided. The camera module includes a lens barrel in which at least one lens is installed; and a lens holder to which the lens barrel is fixedly installed, wherein one of the lens holder and the lens barrel is provided with a coupling protrusion, and the other thereof is provided with a coupling groove into which the coupling protrusion is inserted, the lens holder is provided with a support portion that supports one end portion of the lens barrel, wherein the one end portion of the lens barrel is disposed between the coupling protrusion and the support portion, and the support portion of the lens holder elastically supports the lens barrel in an optical axis direction.