Locking Eyecup with Ratchet Mechanism for Position Stability
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Solution Overview
Problem
Existing eyecups for optical devices, such as binoculars and spotting scopes, tend to shift inadvertently during use due to their rotating adjustment mechanisms, affecting the performance of the optical system and failing to maintain a stable position.
Innovation Solution
A locking mechanism is introduced that allows the eyecup to be securely positioned in various configurations, including fully extended, fully retracted, and intermediate positions, with a one-way lock option that prevents movement towards the eyepiece while allowing adjustment away from it, using ratchet structures and release levers to maintain stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a rotating adjustment mechanism is used for the eyecup, then the eyecup can be adjusted to different positions, but the eyecup may shift inadvertently during use
Solution Approach 1:
The eyecup mechanism transitions from a static fixed position to a dynamic adjustable position system. The linear adjustment mechanism allows the eyecup to move fore and aft along a guided path, providing adaptability to different user needs while maintaining stability through the locking feature that freezes the position once adjusted.
Solution Approach 2:
The patent extracts the adjustment function from the main eyecup body by introducing a separate linear adjustment mechanism with a locking feature. This extracted mechanism can be independently engaged or disengaged, allowing the eyecup to be adjusted when needed and locked when stability is required, resolving the contradiction between adjustability and position stability.
2Adaptability or versatility
If the eyecup is made adjustable to accommodate face geometry variations, then usability is improved, but the complexity of the adjustment mechanism increases
Solution Approach 1:
The adjustment mechanism is segmented into distinct functional components: a linear adjustment element for positioning, a locking element for stabilizing, and a release element for resetting. This segmentation allows each component to perform its specific function efficiently, achieving adaptability to different face geometries without excessive overall complexity.
Solution Approach 2:
Instead of making the eyecup complex to achieve adjustment, the patent inverts the approach by using a simple linear guidance system where the eyecup naturally follows a predetermined path. The complexity is inverted from the adjustment mechanism itself to the locking/release mechanism, which is simpler and more reliable.
3Reliability
If a locking mechanism is added to prevent eyecup movement, then position stability is improved, but the device complexity increases
Solution Approach 1:
The locking mechanism is designed to be self-servicing through the interaction of the adjustment element with the locking element. When the user adjusts the eyecup linearly, the movement automatically engages or disengages the locking feature without requiring separate manual locking actions. This self-service approach provides position stability while minimizing additional 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
The locking mechanism effectively prevents incidental movement of the eyecup during use, ensuring a steady and adjustable position, thereby enhancing the performance and usability of optical devices by maintaining the eyecup's position without requiring constant adjustment.
Implementation Method 1
using ratchet structures and release levers to maintain stability
Data Source
AI summary
An adjustable eyecup for an optical device includes an eyecup slidably coupled with an eyepiece of the optical device, the eyecup having an outer portion and an inner portion and a retainer mechanism structured to restrict motion of the eyecup in a first direction when the locking mechanism is in a locked position.