Reinforced Camera Module Guide Rails for Smooth Autofocus
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Solution Overview
Problem
The increasing weight and complexity of camera components in portable electronic devices due to high-magnification lenses and actuators lead to deformation and vibration issues, necessitating improved rigidity and impact resistance while maintaining autofocus and image stabilization functions.
Innovation Solution
A camera module design incorporating a housing with inner and outer surface rolling parts featuring reinforcement insertion bodies made of a stronger metallic material, equipped with low-friction coatings and spaced rails or flat plate members to guide and support the lens movement, enhancing impact resistance and reducing friction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If high-magnification lenses and high-capacity actuators are introduced to improve camera performance, then imaging quality and autofocus capability are improved, but component weight increases and deformation occurs under vibration and impact
Solution Approach 1:
The guide surface is formed by combining a polymer material body with a metallic reinforcement insertion body having higher strength. This composite structure provides both the lightweight properties of polymers and the high strength of metals, resolving the contradiction between camera performance requirements and component rigidity under vibration and impact.
Solution Approach 2:
The reinforcement insertion body is selectively positioned at the guide surface where high strength is needed to prevent deformation during lens movement. This localized reinforcement approach strengthens critical areas without unnecessarily increasing the weight of the entire housing or carrier components.
2Weight of moving object
If the carrier and housing are made of polymer materials to reduce weight, then portability is improved, but impact resistance and rigidity are insufficient under vibration conditions
Solution Approach 1:
The guide surface combines polymer material (for weight reduction) with metallic reinforcement insertion body (for impact resistance). This composite approach resolves the contradiction between weight reduction for portability and impact resistance under vibration conditions.
3Ease of operation
If the rolling surface is made of soft polymer material to reduce friction, then autofocus operation is smooth, but the surface deforms under the rolling member during operation
Solution Approach 1:
The guide surface uses a composite of polymer material (providing low friction for smooth autofocus operation) and metallic reinforcement insertion body (providing structural stability to prevent deformation under the rolling member). This resolves the contradiction between operational smoothness and surface stability.
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 maintains driving performance and ensures smooth autofocusing and image stabilization operations by providing high impact resistance and reducing component deformation, thus stabilizing image quality.
Implementation Method 1
a rolling member interposed between the inner surface rolling part and the outer surface rolling part
Implementation Method 2
Low-friction coating may be applied to a surface of the reinforcement insertion body
Data Source
AI summary
A camera module is provided. The camera module includes a housing having an internal space and an inner surface rolling part provided on an inner surface thereof; a carrier accommodating a lens barrel, and having an outer surface rolling part provided on an outer surface thereof; an autofocus driving part that generates driving power to move the carrier in an optical axis direction; and a rolling member interposed between the inner surface rolling part and the outer surface rolling part. At least one of the inner surface rolling part and the outer surface rolling part includes a guide surface provided on an outer surface of bodies of the housing or the carrier, and a reinforcement insertion body composed of a material higher in strength than a material of the bodies of the housing or the carrier. A plurality of rails are disposed on the guide surface.