Adjustable Firearm Stock With Dual-Button Position Selector
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Solution Overview
Problem
Current adjustable firearm stocks often suffer from slop and interference with sighting optics, and existing adjustment mechanisms can be difficult to manipulate while shouldering the firearm, failing to provide a snug fit for the user's body and shooting stance.
Innovation Solution
An adjustable stock design featuring a fixed body and a moveable body connected via a sliding mechanism, with a position selector and biasing device that allows for precise adjustment and secure locking, minimizing slop and enhancing fitment to the user's body.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If adjustable stock designs are used to fit user's body and shooting stance, then adaptability is improved, but device complexity increases and slop is introduced
Solution Approach 1:
The stock is divided into a fixed body and a moveable body that can be independently adjusted. The moveable body includes separate selector bodies for different adjustment functions (length of pull and cheek height), allowing each segment to be adjusted independently without affecting other parts of the stock.
Solution Approach 2:
The stock transitions from a static, fixed structure to a dynamic, adjustable structure. The moveable body can slide along the fixed body and be locked at multiple positions using selector bodies, enabling the stock to adapt to different user configurations while maintaining structural integrity.
2Ease of operation
If adjustment devices are made accessible for manipulation, then ease of operation is improved, but device complexity increases
Solution Approach 1:
The selector bodies are designed to be manipulated directly by the user's fingers while the firearm is shouldered. The buttons with protrusions can be pressed and released easily without requiring tools or complex operations, allowing the user to self-adjust the stock in the field.
Solution Approach 2:
The adjustment mechanism uses a dual-button design where buttons are positioned on opposite sides of the moveable body. This spatial arrangement allows each button to control a different adjustment function (length of pull and cheek height), providing intuitive control in different dimensional orientations.
3Adaptability or versatility
If moveable body is slideably connected to fixed body for adjustment, then adaptability is improved, but stability deteriorates due to slop
Solution Approach 1:
The selector bodies are designed to engage with the moveable body before firing occurs. When the buttons are pressed and released, the selector bodies lock the moveable body at the desired position, eliminating slop and ensuring stability is established in advance before the shot is taken.
Solution Approach 2:
The traditional mechanical locking mechanism is replaced with a spring-loaded button system. The biasing device provides continuous pressure to keep the selector bodies engaged with the moveable body, ensuring positive locking without complex mechanical linkages or adjustment mechanisms.
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 design provides a stable and repeatable firing platform by eliminating slop and allowing for precise adjustment, improving accuracy and comfort during shooting, particularly in long-distance applications.
Implementation Method 1
A biasing device is disposed between the first and second selector bodies to bias the first and second selector bodies apart
Implementation Method 2
At least one of the protrusions of the first and second selector bodies engage one of the plurality of locating slots to selectively fix the relative position of the moveable body to the fixed body
Data Source
AI summary
An adjustable stock for a firearm includes a fixed body attachable to the firearm and a moveable body slideably connected to the fixed body. The moveable body defines a butt of the stock. A hole may be defined in one of the fixed body and the moveable body that has a first side opening and a second side opening disposed opposite the first side opening. A position selector is disposed in the hole and includes a first selector body and a second selector body. The first selector body includes a body portion shaped as a button having an engagement surface and a protrusion extending away from the body portion. The second selector body includes a body portion shaped as a button having an engagement surface and a protrusion extending away from the body portion. A biasing device is disposed between the first and second selector bodies to bias the first and second selector bodies apart and so that the engagement surface of the first selector body extends from the first side opening and the engagement surface of the second selector body extends from the second side opening. Further, a plurality of locating slots is defined in the other of the fixed body and the moveable body. At least one of the protrusions of the first and second selector bodies engage one of the plurality of locating slots to selectively fix the relative position of the moveable body to the fixed body.