Camera Filter Crank Arm Damping for Collision Noise Reduction
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Solution Overview
Problem
Existing filter driving devices in camera modules generate collision sounds during operation, causing discomfort in indoor spaces and vehicle cabins due to mechanical interactions.
Innovation Solution
The filter driving device incorporates a crank arm mechanism with stoppers to restrict rotation angles and a shock absorber to minimize contact with the accommodation portion, reducing collision noise.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If a mechanical filter driving device is used to automatically replace filters, then filter replacement function is improved, but collision sound is generated during operation
Solution Approach 1:
A cushioning member (elastic element) is introduced as an intermediary between the crank arm and the accommodation portion. This mediator absorbs impact energy during mechanical operation, preventing direct collision between hard surfaces while maintaining the automated filter replacement function. The elastic element deforms under impact and dissipates energy, eliminating collision sounds without compromising automation.
2Adaptability or versatility
If the crank arm rotates freely, then filter replacement flexibility is improved, but collision with accommodation portion occurs
Solution Approach 1:
The cushioning member is pre-installed between the crank arm and accommodation portion to provide protective cushioning before collision occurs. This prior cushioning arrangement ensures that when the crank arm rotates through its full range of motion, any potential collision is already mitigated by the elastic element, allowing flexible filter replacement without impact damage.
Data Source
AI summary
A filter driving device including a filter; a coupling part to which the filter is coupled; a crank arm of which one side is connected to the coupling part and of which the other side is connected to a driving shaft, and which reciprocatingly rotates around the driving shaft; a first stopper provided at a part close to the driving shaft from the center portion of the crank arm, and restricting the rotational angle of the crank arm; and an accommodation part for accommodating the filter, the coupling part and the crank arm is provided.