Variable Aperture Structure for Stable Camera Module Imaging
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Solution Overview
Problem
The assembly tolerance between the rotatable support and the fastening base in variable apertures of camera modules is large, leading to potential changes in the posture of the rotatable support during camera module shakes, affecting imaging quality.
Innovation Solution
A variable aperture design with positioning protruding parts on the fastening base and/or rotatable support to reduce the assembly tolerance, eliminating the need for ball grooves, simplifying the structure, and enhancing the strength of the components while reducing friction and assembly steps.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a ball is disposed between the fastening base and the rotatable support to reduce assembly tolerance, then the assembly tolerance is reduced, but the structure becomes more complex and the strength of the fastening base and rotatable support is reduced due to the need for grooves
Solution Approach 1:
The invention extracts and removes the ball from the positioning mechanism between the fastening base and rotatable support. Instead of using a ball requiring grooves, the patent uses a direct positioning structure where the rotatable support is positioned on the fastening base without intermediate elements, simplifying the overall structure while maintaining positioning accuracy
Solution Approach 2:
The positioning function is segmented into separate positioning protrusions and positioning grooves formed directly on the fastening base and rotatable support surfaces, eliminating the need for a separate ball component and its accommodating grooves, thus reducing structural complexity while maintaining positioning precision
2Manufacturing precision
If a ball is disposed between the fastening base and the rotatable support to reduce assembly tolerance, then the assembly tolerance is reduced, but the strength of the fastening base and rotatable support is reduced
Solution Approach 1:
By removing the ball and its accommodating grooves, the invention eliminates stress concentration points that would weaken the fastening base and rotatable support. The direct positioning structure maintains assembly tolerance while preserving the full structural strength of the components
Solution Approach 2:
The positioning function is distributed through multiple positioning protrusions and grooves on the component surfaces, eliminating the need for deep grooves that would compromise structural integrity, thus maintaining both positioning precision and component strength
3Device complexity
If the rotatable support is rotatably accommodated in the fastening base with large assembly tolerance, then the structure is simpler, but the posture of the rotatable support changes during camera shakes, affecting imaging quality
Solution Approach 1:
The positioning protrusions and grooves are pre-formed on the fastening base and rotatable support to establish precise relative positioning before assembly. This preliminary positioning action ensures the rotatable support maintains its correct posture during camera shakes, improving imaging reliability without complicating the structure
Solution Approach 2:
The fastening base and rotatable support have self-positioning capabilities through their integrated positioning protrusions and grooves. This self-service positioning mechanism ensures stable relative positioning during operation, maintaining imaging quality without requiring additional complex positioning systems
Data Source
AI summary
The disclosure provides a variable aperture including a fastening base (601), a rotatable support (603), and a variable stop (605). The rotatable support (603) is rotatably accommodated in the fastening base (601) and encloses a space (630). The variable stop (605) includes M blades (65) that jointly enclose a light transmission hole (650). The light transmission hole (650) communicates with the space (630). Each blade (65) is rotatably connected to the fastening base (601), and is slidably connected to the rotatable support (603). M is a positive integer not less than 2. This reduces an assembly tolerance between the rotatable support (603) and the fastening base (601), reduces a difference of a size of the aperture in various postures caused by shaking of the camera module (100), and improves an imaging effect of the camera module (100) and quality of a shot image.