Hair Roller With Metallic Shell And Velcro Segments
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Solution Overview
Problem
Conventional hair rollers require a long time for styling due to the time needed for chemical treatments and heat applications, which is impractical for time-sensitive applications like the show business.
Innovation Solution
A hair roller design featuring an inner plastic shell, a middle Velcro-containing shell, and an outer metallic shell with cut-out regions, allowing for increased thermal conductivity and heat capacity while providing a secure hair attachment through Velcro-like surfaces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional hair rollers are used, then the hair styling process can be completed, but it takes a rather long time (hours) for the style to be set
Solution Approach 1:
The hair roller employs a composite structure with three distinct shells: an inner plastic shell for insulation, a middle Velcro-containing shell for hair attachment, and an outer metallic shell for rapid heat conduction. This composite design combines materials with different thermal properties to achieve both fast heat transfer and controlled styling, resolving the contradiction between styling effectiveness and time consumption.
Solution Approach 2:
The roller is divided into three functional segments (inner, middle, and outer shells), each performing a specific function. The segmentation allows independent optimization of each layer's properties - the metallic outer shell provides rapid heat conduction while the inner plastic shell provides insulation, collectively achieving faster styling without compromising safety.
2Temperature
If a metallic outer shell is used, then thermal conductivity is increased for faster heat treatment, but the surface area available for hair attachment is reduced
Solution Approach 1:
The roller surface is segmented into two functional zones: metallic regions for heat conduction and Velcro-containing regions for hair attachment. The cut-out regions in the outer metallic shell expose the middle shell's Velcro surface, creating a hybrid surface that simultaneously provides thermal conductivity and mechanical hair attachment capability.
Solution Approach 2:
Different regions of the roller surface have different properties: the metallic outer shell provides thermal conductivity in specific areas, while the exposed Velcro surface in cut-out regions provides hair attachment. This local differentiation allows the roller to perform both heat transfer and mechanical attachment functions simultaneously without compromising either.
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
This design significantly expedites hair treatment by increasing heat capacity and thermal conductivity by 60.3% to 73.7% on average, balancing efficiency and safety in hair styling.
Implementation Method 1
The outer shell is made of a metallic material with a thermal conductivity of substantially 43-205 W/m-K
Implementation Method 2
Velcro-containing structure is provided by fabric material having the characteristic of providing a surface with small hooks such that when become contact with hair, it can hold the hair against its surface
Data Source
Figure 1~2
Figure 3
Figure 4
AI summary
The present invention is concerned with a hair roller (2). The hair roller (2) has an inner shell (4), an outer shell (8), and a middle shell (6) positioned between the inner shell (4) and the outer shell (8), all of the inner (4), middle (6) and outer (8) shells having a cylindrical profile defining a through cavity.