Light Adjusting Apparatus Guide Portion Stabilization
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Solution Overview
Problem
Conventional light adjusting apparatuses face challenges in miniaturization due to precision alignment requirements, leading to instability and assembly difficulties as device size decreases, particularly in systems like drop-in type light adjusting apparatuses.
Innovation Solution
A light adjusting apparatus comprising a first and second substrate with a spacer, a shaft member as a center of rotation, a magnet, and a driving coil, with a guide portion on the substrate to restrict movement and stabilize the shaft member's rotation, allowing for easy assembly and high accuracy while maintaining compactness and low production costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the cover frame and shutter base plate are joined with high precision to align shaft, rotor, and hole on a common axis, then the rotational movement of the rotor is stabilized, but the assembly complexity and manufacturing difficulty increase significantly
Solution Approach 1:
A guide portion is introduced as an intermediary component between the shaft and the cover frame/shutter base plate. This guide portion restricts the shaft in non-rotation directions while allowing rotation, thereby stabilizing the rotor's rotational movement without requiring high-precision alignment between the cover frame and shutter base plate. The guide portion acts as a mediator that compensates for assembly tolerances.
Solution Approach 2:
The support structure is segmented into separate functional components: the shaft, the guide portion, and the cover frame/shutter base plate. By separating the guidance function (guide portion) from the mounting structure (cover frame and shutter base plate), the system allows each component to be manufactured and assembled independently with standard precision, eliminating the need for high-precision joining between all components.
2Ease of manufacture
If the tolerance in displacement between axes is set to a great value, then assembly is easier, but the rotational movement of the rotor becomes unstable
Solution Approach 1:
The guide portion serves as a mediator that maintains stable rotational movement even when axis displacement tolerance is large. It restricts the shaft in non-rotation directions while permitting rotation, thereby decoupling the stability of rotational movement from the precision of axis alignment. This allows standard assembly tolerances to be used without compromising rotor stability.
3Volume of moving object
If the device size is reduced to a few millimeters for miniaturization, then the light adjusting apparatus becomes compact and suitable for small imaging devices, but the influence of assembling accuracy becomes noticeable and alignment becomes extremely difficult
Solution Approach 1:
The guide portion is a critical intermediary component that enables miniaturization by maintaining stable rotational movement with relaxed alignment requirements. In compact devices where precision alignment is extremely difficult, the guide portion ensures that the shaft rotates stably without requiring the cover frame and shutter base plate to be joined with high precision, thereby making miniaturization feasible.
Solution Approach 2:
By segmenting the support structure into the shaft, guide portion, and mounting components, the design enables miniaturization. Each component can be manufactured independently and assembled with standard tolerances, which is crucial for compact devices where achieving high-precision alignment across all components would be extremely difficult and costly.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution stabilizes the rotational movement of the light adjuster, reduces assembly complexity, and allows for compact and cost-effective production, ensuring high product accuracy and minimal size while preventing axis misalignment and tilting issues.
Implementation Method 1
a drop-in type light adjusting apparatus in which a single or a plurality of optical elements are mutually moved into and away from an optical path by an electromagnetic driving source
Implementation Method 2
at least one driving device which includes a coil formed separately from the magnet, and drives the incident light adjuster
Data Source
AI summary
A light adjusting apparatus including: first and second substrates, at least one of which has an aperture; a spacer which defines a distance between the first and second substrates; at least one incident light adjuster which includes a shaft member as a center of rotation and rotates between the first and second substrates in a plane orthogonal to an optical axis direction, a magnet being formed on at least part of the shaft; at least one driving device which includes a coil formed separately from the magnet, and drives the incident light adjuster; wherein the driving device rotates the incident light adjuster between a position at the aperture and a position to retract from the position of the aperture, further comprising a guide portion which is formed on the first substrate to restrict movement of the shaft member in directions other than a rotation direction thereof.