Endoscope Distal Tip Structure for Observation Window Protection
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Solution Overview
Problem
Existing endoscopes face issues with the observation window being damaged due to contact with contacted members during handling and cleaning, particularly when the observation window has a convex shape, as existing protective structures may not adequately prevent contact from all directions.
Innovation Solution
The endoscope design incorporates first and second protective projections that project forward of the observation window, along with a nozzle and an extending part, to prevent contacted members from making contact with the observation window by positioning them outside the visual field and ensuring the projections and nozzle are ahead of the window, thus decentralizing the force applied.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If protective structures are added to prevent contact with the observation window, then the observation window is protected from damage, but the device complexity increases
Solution Approach 1:
The protective structure is divided into multiple projections (first protective projection and second protective projection) positioned at different locations. This segmentation allows each projection to handle contact forces from different directions, providing comprehensive protection while keeping individual components simple and manageable.
Solution Approach 2:
The protective projections act as intermediary elements between the contacted member and the observation window. These projections intercept contact forces before they reach the vulnerable observation window, serving as a mediator that protects the delicate optical component from direct contact and potential damage.
2Reliability
If the protective projections are positioned to cover all directions, then contact protection is improved, but the observation field may be blocked
Solution Approach 1:
The protective projections are strategically positioned at specific locations (first protective projection at one side, second protective projection at the other side) rather than creating a complete enclosure. This localized protection approach provides coverage for contact forces from multiple directions while leaving the central observation field clear and unobstructed.
Solution Approach 2:
The protective structure uses asymmetric positioning of projections at opposite sides rather than a symmetric complete enclosure. This asymmetric arrangement provides effective protection against contact from various directions while minimizing interference with the observation field, as the projections are positioned to protect without creating a blocking structure.
Data Source
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AI summary
An endoscope of the invention has a first surface constituting a distal end surface of the insertion part, a second surface formed on a projecting part projecting from the first surface to a front side, and an observation window provided on the second surface. The first surface has a fluid jetting nozzle, a first protective projection, and a second protective projection. The projecting part has an extending part extending from the observation window toward a side opposite to the fluid jetting nozzle. In all combinations of imaginary planes capable of coming into contact with, from the front side, at least two of the fluid jetting nozzle, the first protective projection, the second protective projection, and the extending part, the imaginary planes are disposed forward of the observation window.