Archery Bow Operative Riser for Dynamic Draw Weight Adjustment
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Archers face challenges with high draw weights in archery bows, leading to joint damage, loss of control, and noise issues during hunting or competition, necessitating a solution to efficiently provide a high throw weight with a low draw weight.
Innovation Solution
An archery bow with an operative riser system featuring a first and second end section, a central section, an actuating means within the central section, and a triggering mechanism that allows pivotal movement of the second limb, changing the draw or throw weight by adjusting the distance between the limbs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the draw weight of the archery bow is increased to achieve higher arrow speed and penetration, then the arrow speed and penetration are improved, but the strain on the archer's joints and control difficulty increase
Solution Approach 1:
The riser is designed with a pivotable second end section that can rotate relative to the central section, transforming the static bow structure into a dynamic one. This allows the effective draw weight to be adjusted during operation - high during drawing for arrow speed, and reduced during holding/shooting for joint protection and control
Solution Approach 2:
The invention changes the mechanical parameter of draw weight dynamically through the actuating mechanism. The trigger system modifies the pivot angle of the second end section, which directly changes the effective draw weight applied to the archer's hand and the strain on joints, while maintaining the high throw weight capability for arrow propulsion
2Force
If the draw weight is increased to meet hunting requirements and long-range shooting needs, then the arrow penetration and range are improved, but the difficulty of shooting from awkward positions increases
Solution Approach 1:
The dynamic riser mechanism allows the archer to adjust the bow's effective draw weight on demand. When shooting from awkward positions in trees or hunting stands, the archer can use the trigger to reduce the draw weight, making the bow easier to control and shoot from unstable positions, while still maintaining sufficient penetration force when needed
3Speed
If the draw weight is increased to achieve higher throw weight, then the arrow speed is improved, but the noise generated during shooting increases
Solution Approach 1:
The invention dynamically adjusts the draw weight during the shooting sequence. The high draw weight is present only during the brief moment of arrow release to maximize speed, while the trigger mechanism allows rapid reduction to a lower holding weight, reducing the noise generated during the longer duration of aiming and holding the 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
This system allows for a significant increase in throw weight, potentially doubling or tripling the draw weight, enhancing arrow speed and accuracy while reducing the strain on the archer's joints and minimizing noise during hunting or competition.
Implementation Method 1
the second end section being pivotally connected to the central section... cause pivotal movement of the second limb
Data Source
AI summary
A bow having a high throw weight and a low draw weight. The bow has an operative riser adapted to cause pivotal movement of an upper or lower limb. The operative riser includes a first end section connected to a first limb, a second end section connected to a second limb, and a central section connected between the first and second end sections, the first end section being fixedly connected to the central section and the second end section being pivotally connected to the central section. An actuating means is disposed within the central section to physically engage the second end section. A triggering means is connected to the actuating means to operably engage the actuating means and cause pivotal movement of the second limb. The pivotal movement changes a length between the distal ends of the limbs thus changing a draw or throw weight of the archery bow.