Bistable Spring Wrist Light for Hands-Free Illumination
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Solution Overview
Problem
Existing wrist-mounted lighting devices provide insufficient illumination, often being limited to a single light source or blocked by wrist movement, and fail to offer hands-free operation without cumbersome attachments.
Innovation Solution
A wrist-illuminating device with LEDs arranged around the circumference, a self-contained switch and battery, and a bi-stable spring mechanism that allows attachment without clips or buckles, providing flexible and adjustable illumination for various users.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a single light source is used in wrist-mounted devices, then the device complexity is reduced, but the illumination intensity and coverage are insufficient
Solution Approach 1:
The lighting system is divided into multiple LED light sources arranged around the wrist circumference, with each LED providing illumination to a specific sector. This segmentation allows comprehensive coverage without requiring a single complex light source, resolving the contradiction between illumination coverage and device complexity
Solution Approach 2:
Multiple LED light sources are combined into a single integrated wrist-mounted device that operates as one unit. The LEDs share common power supply, control circuitry, and housing, maintaining device simplicity while achieving superior illumination coverage through the combined output of multiple light sources
2Ease of operation
If traditional fastening methods (clips, buckles) are used, then the attachment is secure, but the ease of operation is reduced due to cumbersome attachments
Solution Approach 1:
The complex fastening mechanisms (clips, buckles, straps) are completely removed from the design. The attachment function is achieved through a simplified elastic band that relies on elastic recovery rather than mechanical fastening components, dramatically improving ease of operation while reducing device complexity
Solution Approach 2:
The elastic band attachment system is self-adjusting and self-securing. The elastic material naturally conforms to different wrist sizes and automatically maintains secure attachment through its elastic recovery property, eliminating the need for user-adjustable clips, buckles, or other mechanical fastening components
3Adaptability or versatility
If a rigid light source is used, then the illumination is stable, but the adaptability to wrist movement is reduced
Solution Approach 1:
The lighting system transitions from a fixed, rigid configuration to a dynamic arrangement where multiple LEDs are positioned around the wrist circumference. This dynamic positioning ensures that regardless of wrist movement or orientation, at least one LED maintains optimal illumination角度, providing both adaptability to movement and consistent illumination reliability
Solution Approach 2:
The lighting system moves from a single-point light source to a distributed arrangement around the wrist circumference (adding circumferential dimension). This dimensional change ensures comprehensive coverage in all directions, making the illumination reliable regardless of wrist position or movement while maintaining adaptability
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
Enables hands-free, adjustable, and versatile lighting for tasks and recreational activities, ensuring consistent illumination without obstructing the wrist and allowing users to perform tasks without carrying additional lighting equipment.
Implementation Method 1
a bi-stable spring mechanism that allows attachment without clips or buckles
Implementation Method 2
LEDs arranged around the circumference
Data Source
AI summary
A wrist light is provided that includes a top element, body element, lighting assembly and a bistable spring. The Bistable spring is movable between flat and coiled configurations to provide a wrist light that may be coiled along the wrist of the user to provide illumination outwardly from the wrist light and to provide a light at the end of the wrist light for directional lighting. The wrist light is formed of a soft and flexible material with the lighting projecting from the outer surface of the wrist light in the coiled configuration.