Optical Sighting Device with Double-Torsion Tilt Adjustment
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Solution Overview
Problem
Conventional optical sighting devices lack the ability to achieve a wide adjustment range for the cylindrical body holding lenses, limiting the overall adjustability and accuracy of the sighting device.
Innovation Solution
The optical sighting device employs an adjustment mechanism using an advancing-retracting member and a double torsion spring to tilt the erect system cylinder, allowing for increased adjustability by pressing the cylinder with the spring even during retraction, and is fixed using a spring fixing part to prevent components from falling off.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a conventional spring mechanism is used to bias the cylindrical body, then the structure is simple, but the adjustment range is limited due to insufficient resilience
Solution Approach 1:
The patent changes the spring parameter from a conventional single torsion spring to a double torsion spring configuration. This parameter change doubles the resilience and biasing force, enabling the cylindrical body to achieve a wider tilting range while maintaining structural simplicity. The double torsion spring allows the impact position to be adjusted over a broader range without significantly increasing device complexity.
2Adaptability or versatility
If the cylindrical body is allowed to tilt over a wide range, then the adjustment width increases, but the stability of the optical system deteriorates
Solution Approach 1:
The double torsion spring acts as a counterweight mechanism that provides continuous biasing force to return the cylindrical body to its neutral position. This counteracting force ensures that even when the cylindrical body tilts over a wide range for adjustment, it can be reliably returned to a stable central position, maintaining optical system stability while enabling broad adjustment capability.
Solution Approach 2:
The double torsion spring provides a feedback mechanism through its biasing force, continuously pushing the cylindrical body back toward the neutral position after tilting. This elastic feedback ensures that the optical system remains stable and predictable, as the spring force automatically counteracts any displacement from the center position, maintaining system stability throughout the adjustment range.
3Adaptability or versatility
If a single torsion spring is used, then the device complexity is low, but the resilience is insufficient to achieve large tilting angles
Solution Approach 1:
The patent merges two torsion springs into a single double torsion spring configuration, combining their resilience and biasing forces. This merging allows the system to achieve large tilting angles in both directions (up to ±45 degrees or more) while maintaining relatively low device complexity. The combined spring configuration provides doubled resilience compared to a single spring, enabling greater angular adjustment without proportionally increasing 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
This configuration enables a broader adjustment range and improved accuracy by utilizing a double torsion spring with high resilience, allowing for larger tilting angles of the erect system cylinder, enhancing the optical sighting device's adjustability and precision.
Implementation Method 1
a double torsion spring, biasing the erect system cylinder toward the advancing-retracting member
Implementation Method 2
an objective system (objective optical system), forming an inverted image of a target object serving as a target of sighting on a first focal plane
Implementation Method 3
an erect system (erect optical system), forming an erect image obtained by reversing the inverted image on a second focal plane
Data Source
Figure 1A
Figure 1B
Figure 2A~2B
AI summary
An optical sighting device (10) used by being installed to a firearm includes: an objective system part (12), forming an inverted image of a target object on a first focal plane; and an erect system part (14), forming an erect image obtained by reversing the inverted image on a second focal plane. The erect system (14) has: lenses (112) to (116) arranged between the first focal plane and the second focal plane; and a movable cylinder (134) as an erect system cylinder holding the lenses (112) to (116). The adjustment mechanism (20) is a mechanism for adjusting tilting of an axial direction of the movable cylinder, and has: an advancing-retracting shaft (204) as an advancing-retracting member advancing and retracting on an end side of the movable cylinder (134); and a spring (206) as a double torsion spring biasing the movable cylinder (134) toward the advancing-retracting shaft (204).