Optical Sight Tubular Lock with Tapered Projections
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Solution Overview
Problem
Conventional optical devices, such as optical sights for guns, suffer from misrecognition issues in their lock mechanisms, where users may mistakenly believe the device is locked when it is actually unlocked due to the collision of projections during operation, leading to unintended adjustment displacements.
Innovation Solution
The optical device incorporates a lock mechanism using tubular parts with recesses and projections on their outer and inner surfaces, where the width of the projections on the fixed tubular part gradually decreases toward the end, ensuring natural engagement and preventing misrecognition by guiding the rotating part into the locked position without collision impressions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If recesses-projections are formed on tubular parts to realize a lock mechanism, then the adjusting mechanism can be locked to prevent unintentional adjustment, but the user may be given an impression that locking is completed while actually in the unlocked state due to collision of projections
Solution Approach 1:
The projection width is varied locally along the axial direction of the tubular part. Specifically, the projection width is designed to be larger in the middle section and smaller near the end section, creating a gradient that guides the rotating tubular part into proper engagement while preventing premature collision impressions.
2Ease of manufacture
If the projection width is constant on the tubular part, then the lock mechanism is simple to manufacture, but the projections collide during operation giving the user a false impression of locking
Solution Approach 1:
The projection width is varied locally along the axial direction of the tubular part. Specifically, the projection width is designed to be larger in the middle section and smaller near the end section, creating a gradient that guides the rotating tubular part into proper engagement while preventing premature collision impressions.
3Ease of operation
If the rotating tubular part and fixed tubular part come into contact during operation, then the lock mechanism engages, but the collision of projections creates a false locking impression before actual engagement
Solution Approach 1:
The gradient projection width configuration is designed in advance to guide the rotating tubular part into proper engagement. As the user operates the adjusting mechanism, the varying projection widths naturally guide the parts together, ensuring that actual engagement occurs only after the collision phase, eliminating false locking impressions.
Data Source
AI summary
An optical device includes an impact position adjusting part which is an operation adjusting part. The impact position adjusting part includes a rotating operation part, a shaft part, a fixed tubular part which is a first tubular part formed with outer peripheral recesses-projections, and a rotating tubular part which is a second tubular part formed with inner peripheral recesses-projections. According to an operation of a user, the rotating operation part moves together with the rotating tubular part to a rotatable position at which the outer peripheral recesses-projections and the inner peripheral recesses-projections are separated, and a rotation prohibited position at which the outer peripheral recesses-projections and the inner peripheral recesses-projections are engaged. In a vicinity of an end part on a side close to the rotating tubular part, a width of a projection of the outer peripheral recesses-projections of the fixed tubular part gradually decreases toward the end part.