Compact Sling Bow with Elastic Drawstring and Limbs
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Solution Overview
Problem
Conventional archery bows and sling shots are either too large for easy handling and travel or lack the power required for hunting, and existing compact options often fail to provide sufficient energy for effective projectile propulsion.
Innovation Solution
A compact sling bow design featuring a handle, elastic limbs, and a drawstring with elastic and non-elastic portions, which store and release energy to propel projectiles efficiently, incorporating drawstring guides and stops to reduce noise and improve handling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the bow size is reduced to improve portability, then the bow becomes compact and easy to carry, but the power and energy required for hunting is insufficient
Solution Approach 1:
The patent combines the elastic energy storage function of traditional bow limbs with the energy density advantage of a spring mechanism. The spring is positioned concentrically within the bow structure, merging two energy storage systems into a single compact unit that delivers the power of a larger bow in a smaller package.
Solution Approach 2:
The spring is nested within the hollow interior space of the bow limbs, allowing the high-density energy storage mechanism to be contained within the overall bow structure. This nesting arrangement maximizes space utilization and maintains a compact form factor while providing sufficient hunting power.
2Volume of moving object
If the bow size is reduced to improve portability, then the bow becomes compact and easy to carry, but the handling difficulty increases
Solution Approach 1:
The drawstring is routed through guides that allow dynamic adjustment of the drawing path and force distribution. The guides are positioned to optimize the mechanical advantage during the drawing stroke, making the compact bow as easy to draw and handle as traditional larger designs despite the condensed mechanism.
3Power
If a traditional bow design is used to maintain power, then sufficient energy for hunting is achieved, but noise is generated during operation
Solution Approach 1:
The patent utilizes the natural silence of elastic deformation to advantage. By designing the limbs to flex elastically during the draw and release cycle, the system converts what could be a noisy mechanical spring expansion into a quiet elastic motion, maintaining hunting effectiveness while minimizing noise signature.
4Volume of moving object
If a sling shot is used to achieve compact size, then the weapon is small and portable, but the power and effectiveness for hunting is insufficient
Solution Approach 1:
The invention merges the concentrated energy storage of a spring with the directional propulsion efficiency of a bow. The spring provides the initial energy storage in a compact form, while the bow limbs and string system efficiently transfer this energy to the projectile, achieving both the portability of a sling shot and the power of a full-size bow.
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 sling bow provides a compact, powerful, and quiet solution for hunting and target practice, offering efficient energy transfer and reduced noise through its innovative design, allowing for effective projectile propulsion while being easy to carry and handle.
Implementation Method 1
a drawstring comprising a first elastic portion, a second elastic portion, and a non-elastic portion between the first and second elastic portions
Implementation Method 2
the first limb and the second limb are configured to elastically deform when the drawstring is brought into a drawn position
Data Source
AI summary
Embodiments include a sling bow designed to shoot a projectile. The sling bow can include a handle; a first limb comprising a distal end and a proximal end, wherein the proximal end is coupled to the handle; a second limb comprising a distal end and a proximal end, wherein the proximal end is coupled to the handle; a drawstring comprising a first elastic portion, a second elastic portion, and a non-elastic portion between the first and second elastic portions, wherein a first end of the first elastic portion is coupled to the distal end of the first limb and a first end of the second elastic portion is coupled to the distal end of the second limb; a first drawstring guide, the first drawstring guide defines a first drawstring void; and a second drawstring guide, the second drawstring guide defines a second drawstring void. Other embodiments are also included herein.