Lens Barrel Segmentation for Deformation Control
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Solution Overview
Problem
Conventional lens holding structures deform the fixed portion on the barrel member due to tightening forces, leading to increased size and potential assembly issues when strengthening the barrel to prevent deformation.
Innovation Solution
A lens apparatus design featuring a barrel member with a fixed portion aligned with an engagement portion in the circumferential direction, a screwing portion at a different phase, and a press member that engages without deforming the screwing portion, allowing for deformation suppression while maintaining a compact size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the barrel member is made stronger to prevent deformation of the fixed portion, then the deformation is suppressed, but the barrel member becomes thicker and the lens barrel becomes larger
Solution Approach 1:
The barrel member is divided into functionally distinct portions: a fixed portion for stable attachment to the fixing member, a screwing portion for controlled engagement with the press member, and an engagement portion for lens positioning. This segmentation allows each portion to be optimized independently, preventing deformation without requiring uniform thickening of the entire barrel member.
Solution Approach 2:
Different portions of the barrel member are given different structural characteristics tailored to their specific functions. The fixed portion is designed for stability, the screwing portion for controlled deformation during assembly, and the engagement portion for precise lens positioning. This local differentiation eliminates the need for overall thickening while maintaining deformation suppression where critical.
2Reliability
If the barrel member is made stronger to prevent deformation, then assembly reliability is improved, but the device complexity increases
Solution Approach 1:
By segmenting the barrel member into specialized portions, each with a defined function, the design achieves high assembly reliability through proper force distribution while avoiding the complexity of an overly reinforced monolithic structure. The segmentation allows simple, optimized geometries in each region.
Solution Approach 2:
Each portion of the barrel member is designed with the minimum necessary structural complexity to perform its specific function reliably. The fixed portion provides stable attachment, the screwing portion enables controlled assembly, and the engagement portion ensures precise positioning, collectively achieving high reliability without unnecessary complexity.
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
This configuration effectively suppresses deformation of the fixed portion on the barrel member during assembly, ensuring secure lens fixation without enlarging the lens barrel, thereby maintaining its size and preventing assembly issues.
Implementation Method 1
a screwing portion (2C) screwed on the press member (3)
Implementation Method 2
a screwing portion (2C) screwed on the press member (3)
Implementation Method 3
an engagement portion (2D) engaged with the press member (3)
Implementation Method 4
a press member (3) configured to press the lens (1)
Data Source
AI summary
A lens apparatus includes a fixing member, a barrel member configured to hold a lens, and a press member configured to press the lens. The barrel member includes a fixed portion fixed to the fixing member, a screwing portion screwed on the press member, and an engagement portion engaged with the press member. The fixed portion is disposed at the same phase as the engagement portion in a circumferential direction of the lens. The screwing portion is disposed at a phase different from the engagement portion in the circumferential direction.