Cocking Hammer Launcher Airtight Sealing for Foam Dart Accuracy
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Solution Overview
Problem
Existing toy projectile launchers, particularly those resembling pistols with a cocking hammer, lack sufficient launching force and accuracy for high-performance foam darts.
Innovation Solution
Incorporation of sealing mechanisms to form airtight seals between the air piston mechanism and the launch barrel, along with a simplified construction featuring a cocking hammer mechanism that enhances air pressure launch force and accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If conventional dart guns are designed with metal barrels and small clearance between barrel and dart, then launching velocity and accuracy are improved, but device complexity and manufacturing difficulty increase
Solution Approach 1:
The projectile is segmented into two distinct parts: a foam body for safety and a separate cap for aerodynamic performance. This segmentation allows each component to be optimized independently - the foam body can be larger and softer while the cap provides the streamlined shape needed for high velocity, resolving the contradiction between safety and performance without requiring extremely tight tolerances throughout the entire projectile.
Solution Approach 2:
The launcher uses a dynamic compression mechanism where the spring-loaded compression member dynamically adjusts to compress the foam body into the cap. This dynamic compression process allows for consistent projectile formation with proper sealing without requiring static precision in the barrel-dart clearance, reducing manufacturing complexity while maintaining launching velocity.
2Force
If airtight seals are improved between air piston and launch barrel, then launching force and accuracy are improved, but device complexity increases
Solution Approach 1:
The sealing function is merged with the compression mechanism. The compression member that compresses the foam body into the cap also serves as the sealing element against the launch barrel. This merging of functions eliminates the need for separate, complex sealing components while achieving effective airtight sealing for high launching force.
Solution Approach 2:
The compression mechanism performs dual functions: it compresses the projectile components together and simultaneously creates the seal against the barrel. The spring-loaded design automatically maintains sealing pressure during the launch cycle without requiring additional sealing components or complex adjustment mechanisms, achieving effective sealing with simpler device architecture.
3Object-affected harmful factors
If foam darts are used instead of traditional dart caps, then safety is improved, but launching speed and distance are reduced
Solution Approach 1:
The projectile is divided into a foam body and a separate cap, allowing the foam to provide safety while the cap provides aerodynamic efficiency. The cap acts as a streamlined shell that reduces air resistance, enabling the foam projectile to achieve high launching speed and distance despite its softer, safer construction.
Solution Approach 2:
The dynamic compression process forcefully embeds the foam body into the cap, creating a tightly integrated projectile structure. This dynamic assembly ensures proper sealing and aerodynamic alignment, allowing the safe foam construction to achieve launching performance comparable to traditional hard darts through proper mechanical integration rather than material substitution alone.
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 solution achieves high velocity and accurate projectile launching, improving the performance of toy launchers by enhancing the air pressure launch force and ensuring precise sealing mechanisms.
Implementation Method 1
a compression spring that is compressed when the cocking hammer mechanism is actuated
Implementation Method 2
a lever arm that is pivotally attached to the cocking hammer mechanism and that is engaged with the compression spring
Implementation Method 3
sealing mechanisms to form airtight seals between the air piston mechanism and the launch barrel... enhancing the air pressure launch force
Data Source
AI summary
A toy projectile launcher including a housing, a launch barrel, an air piston assembly, a trigger, a trigger lever having a distal end portion connected to the launch barrel, a storage cylinder rotatably mounted within the housing and comprising a plurality of projectile holders, wherein each projectile holder is configured to contain a projectile, and a spring that biases the launch barrel away from the storage cylinder. When the trigger is actuated, the trigger lever pulls the launch barrel into engagement with one of the projectile holders of the storage cylinder to form an airtight seal between a rear portion of the launch barrel and the one of the projectile holders.