Camera Reflection Module Reinforcement Against Mirror Cracking
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Solution Overview
Problem
The increased size and weight of actuators in high-performance camera modules lead to higher impact forces on reflection members, causing cracks and reliability issues due to external shocks.
Innovation Solution
A reinforcement structure is embedded within the holder of the reflection module, comprising inclined portions and reinforcing members made of stainless steel, which support the reflection member and distribute stress, enhancing rigidity and absorbing impact forces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If the actuator size and weight are increased to achieve higher camera module performance, then the driving capability is improved, but the impact force transmitted to the reflection member increases causing cracks and reliability issues
Solution Approach 1:
A reinforcement structure is introduced as an intermediary component between the actuator and the reflection member. This reinforcement structure includes reinforcing members embedded in the holder that extend toward the reflection member, acting as a mediator to distribute and reduce the impact force transmitted from the actuator to the reflection member, thereby preventing cracks while maintaining the high-power actuator configuration
2Strength
If the actuator size and weight are increased to achieve higher camera module performance, then the driving capability is improved, but the impact force transmitted to the reflection member increases causing cracks
Solution Approach 1:
The reinforcement structure is designed to convert the harmful impact force into a distributed stress pattern. The reinforcing members embedded in the holder distribute the concentrated impact force from the actuator across a larger area, transforming the harmful localized stress that causes cracks into a beneficial distributed stress pattern that the reflection member can withstand
Data Source
AI summary
A camera module is provided. The camera module includes a housing including an inner space; a reflection module accommodated in the inner space; and a lens module disposed to allow light of which a path has been changed by the reflection module to pass through, wherein the reflection module includes: a reflection member configured to change a path of incident light incident in a first direction; a holder configured to support the reflection member, and a reinforcement structure at least partially embedded in an inner portion of the holder and disposed between the reflection member and the holder.