Dual-Thread Diopter Focus Mechanism for Fast Locking Adjustment
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Solution Overview
Problem
Current diopter adjustment mechanisms face challenges in achieving quick and secure focusing, as fine thread pitches are slow to set but difficult to lock, while fast focus adjustments with larger pitches are prone to self-adjustment when bumped or during firearm use.
Innovation Solution
A diopter adjustment mechanism featuring a scope tube with a first female thread of a larger pitch and a second female thread on the lands, along with a jam nut, where the first pitch is greater than the second pitch, providing a secure locking mechanism without compromising speed of adjustment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a fine thread pitch is used for diopter adjustment, then the adjustment can be locked securely, but it takes a long time to reach the desired setting
Solution Approach 1:
The thread structure is segmented into two distinct pitches: a first pitch for rapid approach to the target diopter setting and a second pitch for precise locking. This segmentation allows the system to optimize for both speed and security in different phases of the adjustment process.
Solution Approach 2:
The system dynamically transitions between two thread pitch characteristics during adjustment. The operator first uses the coarser first pitch for quick movement, then engages the finer second pitch for secure locking, creating a dynamic adjustment process that adapts to different operational requirements.
2Productivity
If a large thread pitch is used for fast focus adjustment, then adjustments can be made quickly, but the adjustment becomes difficult to lock securely and self-adjusts when bumped or fired
Solution Approach 1:
The thread structure is segmented into two distinct pitches: a first pitch for rapid approach to the target diopter setting and a second pitch for precise locking. This segmentation allows the system to optimize for both speed and security in different phases of the adjustment process.
Solution Approach 2:
The system dynamically transitions between two thread pitch characteristics during adjustment. The operator first uses the coarser first pitch for quick movement, then engages the finer second pitch for secure locking, creating a dynamic adjustment process that adapts to different operational requirements.
3Device complexity
If a single thread pitch is used, then the structure is simple, but it cannot simultaneously achieve both rapid adjustment and secure locking
Solution Approach 1:
The thread structure is segmented into two distinct pitches: a first pitch for rapid approach to the target diopter setting and a second pitch for precise locking. This segmentation allows the system to optimize for both speed and security in different phases of the adjustment process.
Solution Approach 2:
Two different thread pitch systems are merged into a single integrated adjustment mechanism. The first and second pitches work together in sequence, combining the advantages of both coarse (fast) and fine (secure) threading in one unified structure.
Data Source
AI summary
A diopter adjustment mechanism comprises a scope tube with a first female thread and a second female thread. The first female thread has a first pitch and is disposed on the scope tube forming a spiral thread and lands between the spiral threads. The second female thread has a second pitch and is disposed on the lands of the first female thread. A jam nut has a male thread corresponding to and engaging the second female thread.