Camera Actuator Rail Coupling for Lens Protection and OIS
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Solution Overview
Problem
Existing camera modules are prone to lens damage from external impact, have issues with optical characteristics, assembly reliability, and adhesive overflow, and require complex components for optical image stabilization.
Innovation Solution
A camera actuator design featuring a base with rail guide parts and lens assemblies that include coupling protrusions and recesses to manage adhesive flow, reduce component count, and improve lens alignment, using a magnetic electronic component for pulling members to enhance OIS operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a camera module uses traditional lens assembly coupling methods, then assembly is straightforward, but the lens groups are vulnerable to damage from external impact
Solution Approach 1:
The patent implements a coupling protrusion structure that extends from the lens assembly into the base, creating a protective barrier before impact can reach the lens groups. This protrusion acts as a shock absorber and structural reinforcement, protecting the lens groups from external impact forces while maintaining a relatively simple overall structure.
2Ease of manufacture
If adhesive is applied freely during assembly, then assembly process is simple, but adhesive overflows causing defects
Solution Approach 1:
The patent introduces a coupling protrusion structure as an intermediary element between the lens assembly and base. This protrusion serves as a physical guide and barrier that confines adhesive to specific regions during assembly, preventing overflow while maintaining ease of manufacture. The protrusion structure mediating the adhesive application process eliminates the need for complex adhesive placement control mechanisms.
3Reliability
If multiple components are used for OIS functionality, then optical image stabilization performance is improved, but device complexity increases
Solution Approach 1:
The patent integrates OIS functionality by coupling the lens assembly directly to the base structure with built-in stabilization capabilities. The coupling protrusion design allows for integrated mounting of OIS components within the base, merging the stabilization function with the structural support system rather than using separate, discrete OIS mechanisms. This reduces component count while maintaining OIS performance.
4Measurement precision
If lens assemblies are fixed rigidly to the base, then positioning accuracy is high, but optical characteristics deteriorate
Solution Approach 1:
The patent implements a coupling protrusion structure that provides rigid positioning at specific critical points while allowing flexibility in other regions. The protrusion creates localized rigid constraints for accurate lens positioning, while the overall assembly maintains degrees of freedom necessary for optimal optical characteristics. This local rigidity approach ensures positioning accuracy without compromising optical performance.
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 enhances assembly reliability, prevents lens damage, improves optical characteristics, and simplifies the OIS operation by reducing component complexity and adhesive overflow, while maintaining precise lens movement and image quality.
Implementation Method 1
a magnetic electronic component for pulling members to enhance OIS operation
Data Source
AI summary
A camera actuator includes a base; a rail guide part coupled to the base; a first lens assembly coupled to the base and configured to move along the rail guide part; and second and third lens assemblies disposed in the base and moving along the rail guide part. The base includes a coupling protrusion. The rail guide part includes a coupling hole corresponding to the coupling protrusion of the base. The coupling hole includes a first hole and a second hole provided in the rail guide part and spaced apart in a first direction.