Epilation Roller With Floating Pivot Tweezers
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Solution Overview
Problem
Existing mechanical depilation devices suffer from uneven force distribution among hair-pulling clips, leading to inefficiencies and prolonged hair removal processes due to rigidly linked blades and limited tweezers per row.
Innovation Solution
An epilation head roller design with pivotally maneuvered movable blades, balanced by spring means and floating pivot links, allowing independent and balanced operation of each tweezers, enabling efficient hair removal by optimizing the number of tweezers per strip and compensating for varying hair diameters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If multiple movable blades are rigidly linked together on a rotating roller, then the device structure is simplified, but the force distribution among hair-pulling clips becomes uneven reducing efficiency
Solution Approach 1:
The patent divides the rigidly linked blade structure into independent movable blades, each capable of moving separately. This segmentation allows each blade to be actuated independently by individual springs, ensuring uniform force distribution across all hair-pulling clips while maintaining a relatively simple overall device structure.
2Device complexity
If only two tweezers per row are arranged on a rotating cylinder, then the device complexity is reduced, but the hair removal duration is considerably increased
Solution Approach 1:
The patent transitions from a single-row arrangement to multi-row configuration with multiple tweezers distributed across several rows on the rotating roller. This dimensional expansion increases the number of simultaneous hair-pulling actions without significantly increasing device complexity, thereby reducing epilation duration while maintaining manageable structural complexity.
3Device complexity
If movable blades are constrained to pivot along fixed axes, then the mechanism control is simplified, but the accommodation of varying hair diameters is limited
Solution Approach 1:
The patent introduces floating pivot links that allow the movable blades to pivot along fixed axes while accommodating variations in hair diameter. The floating mechanism provides dynamic adjustment capability, enabling the blades to adapt to different hair sizes without requiring complex variable-axis mechanisms, thus maintaining relatively simple control while improving 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
This design enhances the efficiency of hair removal by allowing simultaneous and balanced operation of multiple tweezers, reducing the duration of the process and ensuring consistent clamping force across all blades, regardless of hair diameter.
Implementation Method 1
spring means configured on each mobile rod between the adjacent mobile blades to exert mutual forces between these mobile blades and to balance these forces
Implementation Method 2
at least one of the two flanges comprising on its internal face a circular cam track on which the adjoining ends of the movable rods and configured to translate along the axis X3 the movable rod
Data Source
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AI summary
The invention relates to an epilation head roller (10) comprising: a stationary central shaft (13); bars (16), each forming a tubular portion of the roller and being rotated about the central shaft in order to be positioned successively in an operating position; and tweezers (12, 49, 50) arranged on each bar, each of said tweezers being formed by a stationary blade (17) and a moving blade (18, 35, 37, 55, 58, 60, 62, 64) that can move between an open position and a closed position. In addition, the roller comprises manoeuvring means (19) for manoeuvring the moving blades that are configured to: (i) pivot according to transverse axes Y1 into the open position, with all of the moving blades on the bar arriving at the operating position; and (ii) pivot according to transverse axes Y1 into the closed position, with all of the moving blades (18, 35, 37, 55, 58, 60, 62, 64) on the bar (16) leaving the operating position. According to the invention, the manoeuvring means (19) comprise: pivot joints (20) arranged along transverse axes Y1 between the moving blades (18, 35, 37, 55, 58, 60, 62, 64) and the bars (16); moving rods (22) arranged under each bar (16) along axes X3, said floating pivot joints being arranged between the moving blades and each respective moving rod (22); and spring means (38, 56) arranged on each moving rod (22) between adjacent moving blades such as to exert reciprocal forces between the moving blades and to balance said forces.