Movable Cheek Rest for Firearm Shoulder Stock
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Solution Overview
Problem
Certain firearms with adjustable cheek rests face ergonomic issues due to collisions between the loading lever and the cheek rest, especially when a telescopic sight is positioned far forward, requiring frequent adjustment or removal of the cheek rest for loading, which is impractical.
Innovation Solution
A shoulder support system that allows independent movement of the cheek rest along a defined path, using a force application device like a spring to maintain a basic position and a stop to limit its movement, enabling the cheek rest to avoid the loading lever while being adjustable for ergonomic alignment with the telescopic sight.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the cheek rest is positioned far forward to accommodate a telescopic sight, then the shooter has suitable eye-to-eyepiece distance, but the loading lever collides with the cheek rest during manual loading
Solution Approach 1:
The cheek rest is designed to be movable relative to the shoulder rest along a defined path, allowing it to dynamically change position between a forward position (for telescopic sight alignment) and a rearward position (to avoid collision with the loading lever during manual loading). This dynamic adjustment resolves the contradiction by enabling the cheek rest to adapt its position based on operational requirements.
Solution Approach 2:
The cheek rest assembly is separated from the shoulder rest, allowing independent movement and positioning. This segmentation enables the cheek rest to be adjusted independently to either the forward position for optimal telescopic sight alignment or the rearward position to clear the loading lever path during manual loading operations.
2Device complexity
If the cheek rest is made stationary relative to the shoulder rest receptacle, then the structure is simple, but the shooter must frequently adjust or remove the cheek rest for loading operations
Solution Approach 1:
The cheek rest is designed with movable mounting on the shoulder rest, allowing it to be easily repositioned along a defined path. This dynamic capability eliminates the need for complete removal or frequent adjustment, as the cheek rest can simply be slid to a rearward position during loading and returned to forward position afterward, significantly reducing time loss while maintaining structural simplicity.
3Adaptability or versatility
If the cheek rest is integrated into the shoulder rest as known from prior art, then the cheek rest moves backwards with the shoulder rest, but the shooter must spend time finding optimal distance to the telescopic sight eyepiece
Solution Approach 1:
The cheek rest is designed with independent movable mounting that allows it to be adjusted along a defined path relative to the shoulder rest. This enables the shooter to quickly and precisely position the cheek rest for optimal eye-to-eyepiece distance without the time-consuming trial and error associated with integrated designs, while still allowing the cheek rest to move with the shoulder rest when needed.
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 simple and ergonomic operation of the firearm by allowing the cheek rest to be moved out of the way of the loading lever and adjusted for optimal eye alignment with the telescopic sight, improving operational efficiency and reducing the need for frequent adjustments.
Implementation Method 1
a force application device is provided for applying a force directed parallel to the adjustment axis to the cheek rest. The force application device has the advantage that force is applied to the cheek rest along the bearing in a defined direction, so that the cheek rest can be held in a basic position
Data Source
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AI summary
The invention involves a shoulder support (10) for a firearm (12), with a shoulder stock (14), which can be connected by means of a connecting device (20) to a shoulder stock receptacle (18) of the firearm (12), with a shoulder stock adjustment device (22) for adjusting a position of the shoulder stock (14) relative to the shoulder stock attachment (18) along an axis of adjustment (24), and with a cheek rest (26), wherein the cheek rest (26) is mounted on the shoulder stock (14) by means of a bearing (30) so as to be mobile in a direction parallel to the axis of adjustment (24).