Extendable Lens Mechanism for Post-Installation Light Cone Adjustment
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Solution Overview
Problem
Current LED downlight modules installed in ceilings lack the ability to easily adjust the shape of the light cone emitted after installation, making it difficult to change the cone's width or narrowness.
Innovation Solution
A downlight module with an extendable lens system, comprising a heat sink module, telescopic cylinders, and a telescopic holder, allowing for the extension or retraction of the lens by twisting or sliding motions, enabling the adjustment of the light cone's diameter and width.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a fixed lens is used in the downlight module, then the structure is simple and stable, but the light cone shape cannot be adjusted after installation
Solution Approach 1:
The patent applies the dynamics principle by transforming the fixed lens into a movable lens system. The lens is mounted on a telescopic mechanism that allows it to move along the optical axis, changing its position relative to the light source. This dynamic adjustment capability enables the light cone shape to be modified after installation without replacing the entire downlight module, thus improving adaptability while maintaining reasonable structural complexity.
Solution Approach 2:
The downlight module is segmented into distinct functional components: a fixed upper housing, a movable lens assembly, and a telescopic adjustment mechanism. This segmentation allows the lens portion to be independently adjusted without affecting other components. The lens can be moved along the optical axis while remaining part of the integrated module, enabling shape adjustment while preserving overall structural stability.
2Adaptability or versatility
If an extendable lens mechanism is added to allow post-installation adjustment, then the adaptability is improved, but the device complexity increases
Solution Approach 1:
The telescopic adjustment mechanism is nested within the existing downlight module structure. The lens assembly is housed within a telescopic cylinder that fits inside the modular housing, allowing the lens to extend and retract along the optical axis. This nested arrangement enables adjustment functionality to be integrated into the compact modular design without significantly increasing external dimensions or overall structural complexity.
Solution Approach 2:
A telescopic mechanism serves as an intermediary between the fixed housing and the movable lens. This intermediary component translates simple user input (pushing or rotating the outer cylinder) into precise lens position changes. The telescopic mechanism absorbs the complexity of motion control, allowing the lens to be adjusted smoothly while keeping the user interface simple and the overall structure manageable.
3Adaptability or versatility
If the lens is made movable to change light cone shape, then the versatility is improved, but the stability of the optical system may be compromised
Solution Approach 1:
The lens position is pre-configured at optimal positions along the telescopic path for different lighting scenarios. The telescopic mechanism includes predefined stop positions or detents that ensure the lens settles into stable, optically correct positions. This preliminary arrangement of possible positions maintains optical stability while allowing versatility, as users can select from pre-validated configurations rather than arbitrary positions.
Solution Approach 2:
The telescopic mechanism incorporates self-locking or self-centering features that automatically stabilize the lens at desired positions. When the user adjusts the lens by pushing or rotating the outer cylinder, the mechanism naturally settles into stable equilibrium positions without requiring precise manual control. This self-stabilizing behavior maintains optical system stability while enabling easy adjustment.
Data Source
AI summary
A downlight module with an extendable lens may have a heat sink module, a top (inner) cylinder, a bottom (outer) telescopic cylinder, a telescopic holder, a fixed lens, and the extendable lens. The top (inner) cylinder may be attached to a bottom-portion of the heat sink module. The bottom (outer) telescopic cylinder may be operatively linked to the top (inner) cylinder, such that the bottom (outer) telescopic cylinder is movable up or down. The fixed lens may be fixedly positioned within an internal cavity of the bottom-portion. The extendable lens may be located within the bottom (outer) telescopic cylinder that is translatable. The telescopic holder may be a sleeve that fixedly attaches to an exterior of the bottom-portion and covers all of the fixed lens and the top (inner) cylinder. The bottom (outer) telescopic cylinder may extend beyond the telescopic holder. A LED light source may be included.