Firearm Trigger Mechanism with Dual-Axis Rotation
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Solution Overview
Problem
Conventional trigger mechanisms in firearms often result in heavy trigger pull forces, leading to decreased accuracy and instability, as they do not effectively account for the natural curved path of a shooter's finger during trigger pull.
Innovation Solution
A trigger assembly with a pivot pin positioned to allow rotation in both vertical and horizontal planes, enabling the trigger piece to follow the curved path of the finger, combined with a sear and damping system for smooth, crisp trigger engagement and disengagement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a conventional trigger mechanism is used with a horizontal pivot pin, then the trigger piece can rotate in a vertical plane, but the trigger pull force becomes heavy and accuracy decreases
Solution Approach 1:
The patent changes the rotation axis from horizontal to vertical, enabling the trigger piece to rotate in a horizontal plane rather than a vertical plane. This dimensional change allows the trigger piece to follow the natural curved path of the shooter's finger, reducing trigger pull force and improving shooting accuracy by eliminating vertical plane rotation constraints
2Device complexity
If the trigger piece rotates only in a vertical plane, then the structure is simple, but it does not follow the curved path of the finger causing heavy trigger pull
Solution Approach 1:
The patent adds horizontal plane rotation capability to the trigger piece by using a vertical pivot pin instead of a horizontal one. This enables the trigger piece to move in two dimensions (vertical and horizontal planes) following the finger's curved path, reducing trigger pull force without significantly increasing structural complexity
Solution Approach 2:
The patent makes the trigger piece's rotation plane dynamic by allowing it to rotate in both vertical and horizontal planes rather than being constrained to a fixed vertical plane. This dynamic movement adapts to the natural curved path of the shooter's finger, improving ease of operation
3Ease of operation
If a vertical pivot pin is used for horizontal plane rotation, then the trigger piece follows the curved finger path, but additional rotational constraints are needed
Solution Approach 1:
The patent uses a vertical pivot pin to enable horizontal plane rotation, allowing the trigger piece to follow the curved path of the finger. The housing provides natural rotational constraints through its geometry and mounting structure, eliminating the need for additional complex constraint mechanisms
Data Source
AI summary
A trigger assembly includes a housing a sear moveably connected to the housing; and a trigger piece connected to the housing and moveable between a cocked position and a firing position; the trigger piece including a trigger shoe configured to contact a user in moving from the cocked position to the firing position; the trigger piece being configured to rotate about a first axis of rotation and an orthogonal second axis of rotation in moving from the cocked position to the firing position.