Adjustable Cheek Riser Using Living Hinge and Pin Lock
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Solution Overview
Problem
Firearm stock designs often lack adjustable cheek risers that can be easily and intuitively adjusted by users to accommodate different sighting systems and user preferences, leading to suboptimal comfort and accuracy during firing.
Innovation Solution
An adjustable cheek riser system utilizing a living hinge mechanism that allows the cheek riser to switch between expanded and retracted configurations with a single hand motion, featuring a pin that locks into place via a snap fit connection and groove system, enabling quick adjustment between multiple positions to accommodate various optics and user comfort.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a fixed cheek riser design is used, then the structure is simple and manufacturing is easy, but the adaptability to different sighting systems and user preferences is poor
Solution Approach 1:
The cheek riser is designed with a living hinge mechanism that enables dynamic adjustment between extended and retracted positions. This allows the fixed structure to become adjustable, providing adaptability to different sighting systems while maintaining structural simplicity through the use of a flexible hinge rather than complex mechanical joints
Solution Approach 2:
The cheek riser is divided into separable components including the riser body, base, and living hinge mechanism. This segmentation allows the riser to be adjusted independently without affecting the entire stock structure, enabling adaptability while keeping each component relatively simple in design
2Ease of operation
If an adjustable cheek riser mechanism is added, then the ease of operation for adjustment is improved, but the device complexity increases
Solution Approach 1:
The living hinge mechanism is designed to be actuated by the user's finger pressure alone, without requiring tools, screws, or complex locking mechanisms. The spring-loaded pin automatically engages with the slot to maintain position during use, allowing the mechanism to serve itself during operation and significantly improving ease of adjustment
Solution Approach 2:
The traditional mechanical adjustment systems using screws, cam locks, or multiple levers are replaced with a living hinge and spring-loaded pin mechanism. This substitution reduces the number of mechanical components while maintaining adjustment functionality, improving ease of operation without excessive complexity
3Ease of operation
If a living hinge mechanism is used, then the ease of operation is improved, but the reliability of the locking mechanism may be compromised
Solution Approach 1:
The spring-loaded pin is designed to engage with the slot before full adjustment is complete, providing progressive locking. The spring mechanism absorbs shocks and vibrations during firing, maintaining reliable engagement throughout the adjustment range and preventing accidental disengagement
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
Enables rapid and ergonomic adjustment of the cheek riser to suit different sighting systems, improving user comfort and accuracy by allowing seamless transitions between magnified and non-magnified optics, and accommodating various mounting structures without the need for tools.
Implementation Method 1
at least one living hinge positioned on the comb extension member
Implementation Method 2
the at least one pin is a spring-loaded pin
Data Source
AI summary
An adjustable cheek riser for a firearm is disclosed herein. The adjustable cheek riser comprises a comb extension member configured to move between at least an expanded configuration and a retracted configuration. The adjustable cheek riser comprises at least one living hinge positioned on the comb extension member and at least one locking element, the at least one locking element being configured to switch between a locked and an unlocked position upon activation of the living hinge.