Collapsible Chalk Line Device with Spring Tensioning
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Solution Overview
Problem
Marking a chalk line is a labor-intensive process that often requires multiple people and heavy equipment, leading to human error and incorrect construction or installation due to the need for stability and precision.
Innovation Solution
A chalk line marking device with a main body featuring pivotally connected sections, a spring tensioning assembly, and bubble levels, allowing a single person to create a chalk line by moving the sections and using a chalk string, which is stored in chalk boxes, and can be used to mark around wooden surfaces with removable connectors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple people are used to mark a chalk line, then stability and precision are improved, but labor intensity and complexity increase
Solution Approach 1:
The device enables a single operator to perform marking tasks that traditionally required multiple people. The collapsible body allows one person to extend the device to span the required distance, eliminate the need for multiple operators while maintaining marking precision through the rigid extended structure
Solution Approach 2:
The device transitions between collapsed and extended states dynamically. The collapsible body can be extended to the required length for marking, then collapsed for easy transport and storage, providing both precision during use and convenience during transit
2Adaptability or versatility
If heavy equipment like a ladder is used to mark high points, then marking capability is improved, but portability and ease of operation deteriorate
Solution Approach 1:
The device is designed to be dynamically reconfigurable between compact collapsed state for easy carrying and extended state for reaching high marking points, eliminating the need for separate ladders or heavy equipment while maintaining portability
Solution Approach 2:
The device serves multiple functions: it can mark various heights from floor level to ceiling height, mark different surfaces, and be transported easily by one person. This multi-functionality replaces the need for multiple specialized tools like ladders, extension poles, and marking devices
3Adaptability or versatility
If the chalk line marking device is extended to reach high points, then marking versatility is improved, but structural stability may worsen
Solution Approach 1:
The device structure dynamically adapts to the required marking height. When extended to ceiling height for marking, the rigid sections maintain structural stability. When collapsed, the device becomes compact for transport. The same structure provides both stability during use and portability during transit
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 a single person to accurately create chalk lines without additional assistance, reducing human error and improving construction precision while facilitating marking on various surfaces.
Implementation Method 1
a spring tensioning assembly disposed within at least a portion of the main body and the handle, the spring tensioning assembly including a release trigger to move the first section and the second section in response to depressing the release trigger, and a spring connector connected to the release trigger and the chalk string to spring bias the chalk string toward the interior of the handle
Implementation Method 2
a plurality of bubble sections disposed on at least a portion of a first end of the handle and a second end of the handle, each of the plurality of bubble sections including a plurality of bubble levels to indicate a level of a first plane and a second plane
Data Source
AI summary
A chalk line marking device, including a main body, including a first section disposed on at least a portion of a first end of the main body, and a second section disposed on at least a portion of a second end of the main body, a handle disposed between the first section and the second section to facilitate gripping thereof, and a chalk string disposed within at least a portion of the main body and the handle, and around a first tip of the main body and a second tip of the main body to move the first section and the second section from bent in a first position to at least partially extended in a second position, such that the chalk string creates a chalk line in response to movement of the first section and the second section.