Firearm Buttstock Sliding Guide and Locking Bolt Mechanism
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Solution Overview
Problem
Existing buttstocks for firearms, particularly carbines, are difficult to adjust and remove, posing challenges in user adaptation and maintenance.
Innovation Solution
The design incorporates a housing with a sliding guide and a locking bolt system, featuring an actuating lever with a cross pin mount and lever arms that facilitate easy adjustment and removal of the buttstock by allowing the locking bolt to be displaced between locking, displacing, and open positions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a locking bolt system is used to secure the buttstock, then the reliability of the connection is improved, but the ease of operation deteriorates due to difficulty in adjusting and removing the buttstock
Solution Approach 1:
The locking bolt is designed to be displaceable between a locking position and an open position, transforming a static locking mechanism into a dynamic one. The actuating lever enables easy transition between states, allowing the user to switch between secure locking and easy removal/adjustment modes.
Solution Approach 2:
The actuating lever serves as an intermediary mechanism between the user and the locking bolt. By providing a lever arm with sufficient length, it amplifies the user's input force, making it easy to displace the locking bolt despite the high forces involved in locking and unlocking the buttstock.
2Ease of operation
If the actuating lever is made accessible from the clearance, then the ease of operation is improved, but the risk of unintentional actuation increases
Solution Approach 1:
The actuating lever is positioned within the clearance area, which is a localized space designed for this purpose. The lever's actuating surface is accessible only from this specific location, providing controlled accessibility that balances ease of operation with protection against accidental activation.
Solution Approach 2:
The actuating lever is nested within the housing structure, specifically positioned in the clearance between the buttstock and the receiver. This nested arrangement allows the lever to be accessible for intentional operation while being protected from unintentional actuation by the surrounding housing structure.
3Force
If the cross pin is positioned closer to the rear housing part, then the mechanical advantage is improved, but the structural complexity increases
Solution Approach 1:
The cross pin mount is designed as a slot with longitudinal extent rather than a simple circular hole. This dimensional change from a point constraint to a linear constraint allows the cross pin to move along the slot, providing mechanical advantage while maintaining structural simplicity through the use of a straightforward slot geometry.
Data Source
Figure 1~3
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Figure 5
AI summary
The invention relates to a buttstock (5) for a firearm (1). The buttstock (5) comprises: - a housing (10) comprising - a main housing part (11) with a sliding guide (12) for the axially adjustable mounting of the buttstock (5) on a buttstock mount (4) of a receiver (3) of the firearm (1), - a rear housing part (13), - a housing strut (14); - a locking bolt (23) for axially fixing the buttstock (5) on the buttstock mount (4); - an actuating lever (16), wherein the actuating lever (16) is fastened on the main housing part (11) pivotably and displaceably along a longitudinal extent (46) of a cross pin mount (17). The cross pin (18) is arranged in the main housing part (11) in a region above the clearance (15).