Bicycle Wheel POV Light Three-Point Mounting System
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Solution Overview
Problem
Current POV light devices for bicycle wheels face limitations in mounting systems, including incompatibility with modern low-spoke-count wheels, mechanical flex, obstruction on older wheels, and vibration-induced issues such as loosening and rattling, which affect stability and longevity.
Innovation Solution
A light device with a three-point mounting system using resiliently deformable mounting pads to secure the device to multiple spokes, providing stability and offsetting it from the spoke plane, with a length of at least 70 mm to accommodate various wheel configurations and absorb vibrations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the mounting area at the outer end of the light device is increased in length to reach the second spoke on modern low-spoke-count wheels, then the light device can be mounted on more wheel types, but the increased length introduces considerable mechanical flex and causes obstructions on older style wheels with more spokes
Solution Approach 1:
The mounting system is divided into two separate mounting areas: a first mounting area near the hub end with a first mount for attaching to a first spoke, and a second mounting area at the outer end with a second mount for attaching to a second spoke. This segmentation allows each mounting area to be optimized independently - the first mounting area can be longer for stability on low-spoke-count wheels while the second mounting area remains compact to avoid obstructions on high-spoke-count wheels.
Solution Approach 2:
The mounting system utilizes the radial dimension of the wheel by positioning mounting areas at different radial locations - one near the hub and one at the outer end. This dimensional distribution allows the light device to span across multiple spokes effectively, achieving versatility across different wheel configurations without compromising structural integrity.
2Adaptability or versatility
If the light device is positioned in the plane of the spokes to accommodate wheels with many closely spaced spokes, then the device can fit on high-spoke-count wheels, but there is insufficient space between adjacent spokes at the rim
Solution Approach 1:
The light device is positioned offset from the plane of the spokes, utilizing the third dimension (depth) rather than attempting to fit within the constrained two-dimensional plane between closely spaced spokes. This allows the device to accommodate high-spoke-count wheels by projecting outward from the spoke plane into the available radial space.
3Strength
If metal mounting hardware is used to securely attach the light device to spokes, then the attachment is strong and reliable, but the hardware can damage spokes when vibrating against them for extended periods
Solution Approach 1:
The mounting system incorporates compliant mounting elements that act as intermediaries between the rigid metal mounting hardware and the spoke. These compliant elements provide the necessary attachment strength while absorbing vibration and preventing direct metal-to-spoke contact, thereby eliminating spoke damage from vibration.
Solution Approach 2:
The mounting system converts the potentially harmful vibration that would cause metal hardware to damage spokes into a beneficial damping effect. The compliant mounting elements are designed to absorb and dissipate vibrational energy, transforming what would be a harmful mechanical impact into a protective vibration-damping function.
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 ensures a versatile, stable, and secure light device that fits a wide range of wheel configurations, reduces vibration-related issues, and prevents damage to spokes, enhancing the overall performance and durability of the mounting system.
Implementation Method 1
resiliently deformable mounting pads to dampen vibration
Data Source
AI summary
A light device for a bicycle wheel that includes a body having a rim end and a hub end, a row of at least seven independently controllable lights extending between the rim end and the hub end, electronic controls for the lights, and three mounts for securing the body to spokes of the wheel. A first mount is located near the hub end to secure the body to a first spoke. A second mount is located near the rim end to secure the body to the first spoke. A third mount is located on a side of the lights opposed to the first and second mounts and between the first and second mounts to secure the body to the second spoke. Each of the mounts includes a mounting pad located between the body and the spokes and made of a resiliently deformable material to dampen vibration and offset the body and lights from the plane of the spokes. Each of the mounts also includes an attachment clamping the mounting pad between the body and the spokes.