Pivotable Heatable Plates for Hair Styling Appliance
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Solution Overview
Problem
Conventional hair styling appliances face challenges such as hair escaping during styling due to uneven clamping force and arm flexing, which limits material choices and increases user effort.
Innovation Solution
A hair styling apparatus with pivotable heatable plates that move in a 'seesaw' action, reducing pressure differential and allowing for improved thermal contact, along with a control system for maintaining optimal temperature, and manufacturing methods like cold forging and milling for enhanced heat transfer and surface smoothness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the arms are made rigid to maintain structural stability, then the appliance durability is improved, but the plates cannot flex to realign with hair sections
Solution Approach 1:
The plate assembly is segmented into the plate itself and the arm member, connected by a plate pivot. This allows the plate to rotate independently relative to the arm, enabling realignment with hair sections while the arm maintains rigid structural support. The segmentation separates the realignment function from the structural support function.
Solution Approach 2:
The plate pivot introduces dynamic movement capability to the previously static plate-arm connection. The plate can now rotate dynamically to follow the contour of hair sections, while the arm remains structurally stable. This dynamic adjustment occurs during the styling operation without compromising overall appliance rigidity.
2Ease of operation
If the arms are made flexible to allow plate realignment, then the ease of operation is improved, but the material choices and construction are limited
Solution Approach 1:
By separating the realignment function into a distinct plate pivot mechanism, the arm can remain rigid and be manufactured from conventional materials like metal. The flexibility is localized to the pivot joint rather than requiring the entire arm to be flexible, thus expanding material choices.
Solution Approach 2:
The plate pivot acts as an intermediary element between the rigid arm and the plate. It mediates the realignment motion without requiring the arm itself to be flexible, allowing the use of rigid, easily manufacturable arm materials while still achieving the desired plate realignment capability.
3Ease of operation
If the user applies continuous squeezing pressure to flex the arms for plate realignment, then the plate alignment is improved, but the user effort and fatigue increase
Solution Approach 1:
The plate pivot enables automatic dynamic realignment of the plate with minimal user effort. As the user naturally moves the appliance along the hair, the plate can rotate to maintain proper alignment, eliminating the need for continuous squeezing pressure to force arm flexing.
Solution Approach 2:
The plate pivot mechanism provides self-aligning capability. The plate automatically adjusts its orientation relative to the arm based on the hair contour and applied styling force, without requiring the user to actively manipulate the arm flexibility. The system serves itself by automatically realigning during normal operation.
4Device complexity
If the heatable plates are made fixed to the arms for structural simplicity, then the device complexity is reduced, but the thermal contact with moving hair is insufficient
Solution Approach 1:
The plate pivot transforms the fixed plate mounting into a dynamic, adjustable connection. The plate can rotate to maintain optimal thermal contact with the hair as it moves and is styled, ensuring consistent heat transfer throughout the styling process while adding minimal complexity to the mounting structure.
Solution Approach 2:
The plate pivot allows the plate orientation parameter to change dynamically during operation. This parameter change enables the plate surface to maintain optimal alignment and thermal contact with the hair, improving heat transfer efficiency without requiring a complex active control system.
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 provides consistent clamping force, reduces the risk of heater stress, increases appliance longevity, and makes styling easier and more efficient by minimizing user effort and preventing hair escape.
Implementation Method 1
hair is clamped between the hot heatable plates and then pulled under tension through the plates so as to mould it into a straightened form
Implementation Method 2
Ceramic heaters, in particular those with a pure resistive profile enable optimisation of the thermal control loop, thus allowing the plates in contact with hair to remain near transition temperature during styling
Data Source
AI summary
A hair styling apparatus includes a first and a second arm each having a heatable plate and an arm member. The first and second arms are moveable between a closed position, in which the heatable plate of the first arm is adjacent the heatable plate of the second arm, and an open position, in which the heatable plates of each arm are spaced apart. The heatable plate of at least one of the arms is coupled to a respective arm member about a pivot arranged to allow the heatable plate to move relative to the respective arm member about an axis transverse to the length of said respective arm member such that the plate pivots.