Compact Firearm Backup Sights for Centered Posts and Shift-Free Apertures
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Solution Overview
Problem
Existing firearm sighting systems face issues with misalignment of front sight posts due to thread tolerance, lateral shift of rear apertures, and bulkiness of windage detent mechanisms, affecting stability and aesthetics.
Innovation Solution
A sighting system with a diamond-shaped front sight post and single detent for centering, and a paddle-like rear aperture mechanism that flips 180° without lateral shift, using a center threaded nut to maintain alignment and symmetry.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If traditional thread-fitment is used for front sight post installation, then ease of manufacture is improved, but manufacturing precision deteriorates causing misalignment
Solution Approach 1:
The patent extracts the centering function from the thread-fitment process by introducing a separate centering mechanism. The centering sight post with diamond-shaped cross-section and the single detent work together to eliminate lateral misalignment that cannot be resolved by thread-fitment alone, thereby achieving both ease of manufacture and high alignment precision.
Solution Approach 2:
The diamond-shaped aperture acts as an intermediary element between the sight post and the housing. This geometric feature mediates the alignment by forcing the sight post into the correct centering position through mechanical contact, bridging the gap between simple thread-fitment and precise alignment requirements.
2Adaptability or versatility
If aperture rotates 90° for selecting small and large apertures, then adaptability is improved, but manufacturing precision deteriorates due to lateral shift
Solution Approach 1:
Instead of rotating the aperture 90° as in traditional designs, the patent inverts the approach by using a 180° flip mechanism. This inversion allows the aperture to rotate to a position directly opposite its starting point, eliminating the lateral shift that occurs with 90° rotation while maintaining the ability to select between small and large apertures.
Solution Approach 2:
The patent employs asymmetric positioning of the small and large apertures on opposite sides of the housing, with the ability to flip between them. This asymmetric arrangement allows both apertures to be accessible while maintaining precise alignment, as the flip mechanism ensures the apertures return to their exact original positions.
3Reliability
If separate spring and detent mechanism are used for windage adjustment, then reliability is improved, but device complexity increases
Solution Approach 1:
The patent merges the spring and detent into a single integrated component - a leaf spring with built-in detent features. This combination eliminates the need for separate spring and detent parts while maintaining the reliability of the windage adjustment mechanism, as the leaf spring provides both the mechanical force and the detent positioning in one element.
Solution Approach 2:
The leaf spring serves multiple functions simultaneously: it provides the mechanical force for the detent mechanism, the detent positioning, and the structural support for the windage adjustment. This multi-functionality reduces the overall number of components while maintaining the reliability required for precise windage adjustment.
Data Source
AI summary
A sighting system for a firearm and related methods are disclosed. The sighting system has front and rear flip-up sights, wherein the front sight comprises a flip-up portion having an aperture through which a sight post can partially extend; a knob comprising one or more notches on a first side and the sight post extending from a second side; at least one detent arranged to face and interact with the one or more notches. The knob is configured to rotate about a first axis, where the rotation causes the sight post to move in a first direction along the first axis; tilting of the knob in a second direction based on the detent interfacing with the notches; and tilting of the sight post in the second direction, thereby forcing at least a portion of the sight post to press against the aperture, or a combination thereof.