Optical Module Frame Reinforcement Structure for Stress Distribution
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Solution Overview
Problem
In projector actuators with metal frame bodies, stress concentration occurs at the shaft portion due to uniform structural strength, leading to potential fatigue damage from excessive stress, which affects stability and response speed.
Innovation Solution
Incorporating a reinforcement structure with a fracture positioned corresponding to the shaft portion in the frame body, which distributes deformation and reduces stress concentration, enhancing the structural strength of the frame portion while maintaining a lower stress level on the shaft portion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a reinforcement structure is added to the frame portion to increase structural strength, then the stability and response speed improve, but stress concentration occurs at the shaft portion leading to fatigue damage
Solution Approach 1:
The patent applies local quality by creating a fracture in the reinforcement structure at the specific location corresponding to the shaft portion. This localized modification makes the reinforcement structure stronger in most areas while creating a controlled weakness at the critical shaft location, thereby distributing stress and preventing stress concentration that would lead to fatigue damage.
Solution Approach 2:
The reinforcement structure is segmented by introducing a fracture that divides it into multiple sections. This segmentation allows the structure to flex and distribute deformation more evenly during actuator operation, preventing excessive stress concentration at any single point while maintaining overall structural strength.
2Ease of manufacture
If the frame body uses uniform thickness metal material, then manufacturing is simple, but both frame portion and shaft portion deform during operation affecting response speed
Solution Approach 1:
The patent modifies the uniform frame body by adding a localized reinforcement structure with a fracture. This creates non-uniform structural properties where the frame portion has enhanced strength while the shaft portion maintains appropriate flexibility, enabling faster response without compromising manufacturing simplicity.
Data Source
AI summary
An optical module includes a frame body and an optical element. The frame body includes at least one fixing portion, at least one frame portion, at least one shaft portion, and at least one reinforcement structure. The frame portion is connected to the fixing portion through the shaft portion. The reinforcement structure is connected to the frame portion and forms at least one fracture. The position of the fracture corresponds to the at least one shaft portion. The optical element is disposed in the frame portion. In addition, a projection device having the optical module is also provided.