Imaging Device Shielding Member Gap Prevention
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Solution Overview
Problem
Conventional imaging device support structures suffer from twists and warps in the shielding member, leading to positional shifts and potential entry of foreign substances like dust and dirt into the imaging plane due to the tightening of screws.
Innovation Solution
A shielding structure with a first member having an opening portion through which an axis passes, a shielding member that shields the opening portion, and a second member pressing the shielding member inward, where the opening edge of the opening portion has a substantially polygonal shape with corner portions that outwardly protrude, reducing twists and warps and ensuring a close contact between the shielding member and the first member.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the shielding member is pressed tightly against the opening edge to prevent gaps, then foreign substance protection is improved, but twists and warps in the shielding member increase causing positional shifts
Solution Approach 1:
The opening edge is designed with different local geometries: corner portions protrude outwardly to provide clearance and prevent twists/warps at corners, while side portions between corners are positioned to maintain close contact with the shielding member for sealing. This local differentiation allows simultaneous achievement of positioning accuracy and foreign substance protection.
Solution Approach 2:
The opening edge is segmented into multiple functional portions: corner portions that protrude outward to prevent shielding member deformation, and side portions that maintain close contact for sealing. This segmentation allows each portion to fulfill its specific function without interfering with the other.
2Measurement precision
If screws are tightened to adjust imaging device tilt, then alignment is improved, but the shielding member deforms creating gaps
Solution Approach 1:
The opening edge geometry provides local clearance at corner portions where the shielding member is most susceptible to deformation from screw tightening. This localized space absorption prevents the deformation from propagating to the imaging device alignment, allowing precise tilt adjustment without compromising shielding member flatness.
3Ease of manufacture
If the opening edge has a simple rectangular shape, then manufacturing is simplified, but the shielding member cannot spread out causing increased gaps at corners
Solution Approach 1:
The opening edge departs from a simple rectangular shape by having corner portions that protrude outwardly. This asymmetric modification creates localized expansion spaces at corners while maintaining overall geometric simplicity. The design achieves improved gap prevention without significantly complicating the manufacturing process.
Data Source
AI summary
An imaging device support structure includes a master flange having an opening portion through which an optical axis A passes, an imaging device which is attached to the master flange via the attachment plate and is positioned in the opening portion as viewed in an optical axis A direction, and a shielding member which shields a gap between the master flange and the imaging device in the opening portion. The shielding member is pressed against the opening edge of the first opening portion. The opening edge of the first opening portion has a substantially polygonal shape with corner portions which outwardly protrude.