Expandable Light String with Elastic Cable for Plant Growth
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Solution Overview
Problem
Decorative light strings can cause tensile forces on trees and shrubs when left for extended periods, potentially leading to damage or death due to lack of elastic expansion capabilities.
Innovation Solution
An expandable light string with a flexible cable and expansion members that elongate under tensile force and contract when force is reduced, allowing for natural growth and reducing stress on plants.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of stationary object
If light strings are left adorning trees and shrubs for longer periods, then the decoration duration is extended, but tensile forces cause damage to plants and destruction of light strings
Solution Approach 1:
The light string incorporates an expandable section with elastic members that can dynamically change length. When tensile force from plant growth is detected, the elastic members expand to increase the distance between fixed points, thereby reducing the tensile force on the plant while maintaining electrical continuity for ongoing decoration.
2Stability of the object's composition
If the light string is made rigid to maintain structural stability, then the light string maintains its shape, but it cannot accommodate plant growth and causes tensile damage
Solution Approach 1:
The light string is divided into fixed sections and an expandable section. The fixed sections provide structural stability and mounting points, while the expandable section with elastic members provides adaptability to accommodate plant growth by expanding when tensile force is applied.
3Adaptability or versatility
If the light string is made elastic to accommodate plant growth, then the light string can expand with growth, but electrical conduction may be disrupted
Solution Approach 1:
The expandable section uses a composite structure combining elastic members with conductive elements. The elastic members provide expansion capability while the conductive elements (such as conductive adhesive or conductive fabric) maintain electrical conduction throughout the expanded section, ensuring reliable power delivery to lighting elements regardless of expansion state.
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 expandable light string accommodates plant growth while maintaining electrical conduction and illumination, preventing damage to both the plants and the light strings.
Implementation Method 1
one or more expansion members coupled to the flexible cable. The one or more expansion members is configured to expand, in response to a tensile force applied to the first and second ends of the flexible cable, so that a length of the flexible cable between the first and second ends increases, and to contract, in response to a reduction in the tensile force applied to the first and second ends of the flexible cable, so that the length of the flexible cable between the first and second ends decreases
Data Source
AI summary
Apparatus and associated methods relate to a light string having pluralities of lighting elements and one or more expandable links thereon, so as to facilitate expansion of the light string in response to applied tensile forces. The one or more expandable links includes a segment of flexible cable and an expansion member mechanically engaging the segment of the flexible cable. The one or more expandable links is in a natural state if no tensile force is applied between the first and second ends of the light string and in an expanded state if a tensile force is applied between the first and second ends of the light string. In the natural state, an arcuate portion of the flexible cable is between the first and the second ends of the light string. The arcuate portion of the flexible cable changes shape in response to an applied tensile force applied therebetween.