Archery Bow Riser Cavity for Repeatable Accessory Mounting
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing archery bows face issues with added weight and bulk due to accessories, which can change placement and orientation when removed and reinstalled, affecting accuracy and requiring novel structures that reduce weight and profile while ensuring consistent accessory positioning.
Innovation Solution
The archery bow design incorporates asymmetrical apertures and fasteners oriented at non-orthogonal angles to secure mounting bars, allowing accessories to be consistently positioned and attached with a single fastener, reducing weight and bulk while maintaining accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If accessories are attached to the bow riser, then the bow gains functional capabilities, but the weight and bulk of the bow increase
Solution Approach 1:
The accessory is nested within a cavity in the bow riser, allowing it to be stored inside the bow structure when not in use. This eliminates the need for external mounting hardware and reduces the overall profile and weight of the bow while maintaining full functional capability when the accessory is deployed.
Solution Approach 2:
The cavity structure serves multiple functions: it stores the accessory, provides mounting surfaces through contact portions, and integrates the accessory into the bow's existing structure. This multi-functionality reduces the need for separate mounting components, thereby reducing overall weight.
2Adaptability or versatility
If accessories are removed and reinstalled, then the bow can be configured for travel or storage, but the specific placement and orientation of the accessory change due to tolerances and clearances
Solution Approach 1:
The aperture and contact portions are designed with asymmetrical features including a flat surface and an arcuate surface. This asymmetry creates a unique orientation that allows the accessory to be installed in only one correct position, ensuring consistent placement and orientation every time the accessory is removed and reinstalled, thereby eliminating tolerance accumulation issues.
Solution Approach 2:
The asymmetrical contact portions automatically guide the accessory into the correct orientation during installation. The arcuate surface and flat surface work together to self-align the accessory, eliminating the need for complex alignment procedures or multiple adjustment steps, and ensuring repeatable precision across multiple installations.
3Strength
If accessories are attached with multiple screws, then the accessory can be securely fastened, but the order of tightening the screws can change the specific placement of the accessory
Solution Approach 1:
The single fastener is positioned and oriented at a non-orthogonal angle relative to the bowstring plane, creating an asymmetrical mounting configuration. This eliminates the need for multiple screws and their associated tightening sequences, while still providing secure attachment through the asymmetrical contact portions that prevent misalignment.
Solution Approach 2:
Instead of using multiple fasteners distributed across the accessory mounting surface, the design inverts the approach by using a single fastener combined with asymmetrical contact surfaces. The contact surfaces do the work of positioning and alignment that would traditionally require multiple fasteners, while the single fastener provides the securing function.
Data Source
AI summary
In some embodiments, an archery bow comprises a riser, a first limb, a second limb and a bowstring. The riser comprises a first rail, a second rail and a plurality of connecting members extending between the first rail and the second rail. The riser comprises an accessory cavity comprising an aperture through the first rail. The aperture comprises an asymmetrical shape. In some embodiments, the aperture comprises a first aperture and the accessory cavity comprises a second aperture through the second rail. In some embodiments, the second aperture has the same shape as the first aperture.