Aperture Structure Linear Blade Adjustment

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Solution Overview

Problem

Existing variable apertures in cameras are prone to getting stuck when rotating, affecting user experience and limiting the ability for stepless adjustment of aperture size.

Innovation Solution

An aperture structure comprising a substrate, a blade with a light transmitting hole, and a shielding assembly that form a polygonal aperture hole. The blade and/or shielding assembly are movably arranged in a linear direction to change the size of the aperture hole, preventing sticking issues and enabling stepless adjustment.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If a variable aperture uses a rotating blade structure to adjust aperture size, then the aperture can be adjusted to different sizes, but the blade is prone to getting stuck during rotation

Engineering Contradiction:

Improveaperture size adjustmentVSAvoidblade sticking prevention

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The patent inverts the conventional rotating blade structure by using a linear sliding mechanism instead. The blade moves linearly along the optical axis rather than rotating, which eliminates the sticking problem associated with rotation while maintaining aperture adjustment capability. This inversion of the motion mode directly resolves the contradiction between adaptability and reliability.

Inventive Principle:

Principle #13The other way round (Inversion)

Solution Approach 2:

The patent replaces the conventional rotational mechanical system with a linear sliding mechanical system. By substituting the rotation mechanism with a linear movement mechanism, the design eliminates the sticking issue that plagues rotational systems while preserving the aperture adjustment function, thus improving reliability without sacrificing adaptability.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

2Adaptability or versatility

If a variable aperture uses a rotating blade structure, then aperture adjustment is possible, but stepless adjustment is limited

Engineering Contradiction:

Improveaperture size adjustment rangeVSAvoidstepless adjustment capability

Core Design Contradiction:

Adaptability or versatilityVSEase of operation

Solution Approach 1:

The patent employs a dynamic linear sliding mechanism that allows continuous movement of the blade along the optical axis. This dynamic structure enables stepless aperture adjustment by permitting the blade to move to any position within the adjustment range, rather than being constrained to discrete rotational positions. The continuous linear motion directly enables stepless adjustment while maintaining a wide adjustment range.

Inventive Principle:

Principle #15Dynamics

3Adaptability or versatility

If the aperture size is changed by moving the blade or shielding assembly, then the aperture hole size can be adjusted, but the central axis may shift

Engineering Contradiction:

Improveaperture hole size adjustmentVSAvoidcentral axis stability

Core Design Contradiction:

Adaptability or versatilityVSStability of the object's composition

Solution Approach 1:

The patent employs an asymmetric shielding assembly structure that compensates for the linear movement of the blade. The shielding assembly is designed with specific geometric asymmetry that maintains the central axis position stable even as the aperture size changes through linear blade movement. This asymmetric design resolves the contradiction by allowing size adjustment while preserving axis stability.

Inventive Principle:

Principle #4Asymmetry

Data Source

PatentUS20250044665A1Aperture structure, lens assembly and terminal

Publication Date: 2025.02.06 BEIJING XIAOMI MOBILE SOFTWARE CO LTD

AI summary

An aperture structure includes a substrate, a blade and a shielding assembly. The blade has a light transmitting hole. The shielding assembly and the light transmitting hole form a first aperture hole having a polygonal shape. At least one of the blade or the shielding assembly is movably arranged on the substrate in a first direction, to change the size of the first aperture hole.