Adjustable BB Gun Stock for Variable Length of Pull
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Solution Overview
Problem
Conventional BB guns with fixed stocks are unsuitable for users of different body types or sizes, as they lack the ability to adjust the length of pull, making them suitable only for a specific body type or size.
Innovation Solution
An adjustable stock system for BB guns, comprising an adapter and a butt stock that can translate and be secured in multiple positions, allowing for adjustable length of pull, accommodating users of varying sizes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a fixed stock is used in a BB gun, then the structure is simple and manufacturing is easy, but the BB gun cannot accommodate users of different body types or sizes
Solution Approach 1:
The stock is divided into multiple segments or sections that can be adjusted relative to each other. The stock includes a forend, a grip, and a buttstock portion that can be repositioned along the barrel axis, allowing the overall length and configuration to be segmented and reconfigured for different user sizes.
Solution Approach 2:
The stock transitions from a static, fixed configuration to a dynamic, adjustable configuration. The stock includes movable components such as a telescoping buttstock or adjustable forend that can be repositioned along the barrel, enabling the stock to adapt its length and shape according to the user's body type while maintaining structural integrity through locking mechanisms.
2Adaptability or versatility
If the stock length is fixed, then manufacturing precision requirements are lower, but the BB gun is suitable only for one body type or size
Solution Approach 1:
The stock design provides multi-functionality by enabling a single stock structure to serve multiple users of different sizes. The adjustable mechanism allows the stock to assume multiple configurations, making it universally applicable to children, adults, and users with different body types, thereby eliminating the need for multiple fixed-stock models.
Solution Approach 2:
The stock allows for parameter changes in its physical dimensions, specifically the length along the barrel axis. By enabling the stock to change its effective length through adjustment mechanisms such as telescoping sections or movable components, the design accommodates varying user requirements without requiring multiple precision-manufactured fixed-stock variants.
3Ease of operation
If an adjustable stock is implemented, then the BB gun can be used by persons having different body types, but the device complexity increases
Solution Approach 1:
The adjustment mechanism is designed to be user-operable without requiring external tools or complex procedures. The stock includes features such as sliding components, telescoping sections, or movable parts that can be easily repositioned and locked by the user themselves, enabling self-service adjustment for different body types while minimizing the need for additional complex mechanisms.
Data Source
AI summary
A BB gun may include a firing mechanism assembly and an adjustable stock. The adjustable stock may include an adapter coupled to the firing mechanism assembly and a butt stock movably coupled to the adapter for providing the BB gun with an adjustable length of pull. The butt stock may be configured to translate relative to the adapter and to be selectively secured relative to the adapter in a plurality of positions defining a plurality of different lengths of pull.


