Hair Removal Head With Offset Cam-Guided Tearing Blades
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Solution Overview
Problem
Existing depilatory devices are not suitable for use on sensitive areas or fine hair removal due to their design, which limits their accessibility and precision.
Innovation Solution
A depilation head with a simplified structure, featuring a rotating roller with offset tearing rows and a single tearing blade per row, allowing for precise hair removal on all areas, including difficult-to-access regions, by alternately pinching and releasing hairs through a narrow circumferential zone.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple rows of tweezers are arranged on a rotating roller, then the productivity of hair removal is improved, but the device complexity increases and accessibility to sensitive areas deteriorates
Solution Approach 1:
The patent divides the hair removal function into multiple independent tearing rows arranged on the periphery of a single roller. Each row contains tearing elements that can be independently positioned and controlled, allowing the device to maintain high productivity while simplifying the overall structure compared to traditional multi-roller designs.
2Productivity
If traditional depilatory devices with multiple rows of tweezers are used, then broad area hair removal is efficient, but precision and accessibility to sensitive areas deteriorates
Solution Approach 1:
The patent implements local quality by creating different functional zones on the roller periphery. The tearing rows are strategically positioned to create concentrated active zones with precise geometric configurations, while other areas of the roller remain inactive. This allows the device to efficiently handle both broad areas and sensitive regions requiring precision.
Solution Approach 2:
The patent transitions from traditional linear arrangement of tweezers to a circumferential arrangement on the roller periphery. This dimensional change creates multiple active zones around the roller, enabling simultaneous treatment of different body areas with varying precision requirements, thus improving accessibility to sensitive regions.
3Manufacturing precision
If a narrow circumferential epilation zone is created with offset through holes, then precision and accessibility to sensitive areas is improved, but the manufacturing complexity increases
Solution Approach 1:
The patent employs asymmetry by offsetting the through holes in adjacent bars along the longitudinal axis. This asymmetric arrangement creates the narrow circumferential epilation zone while maintaining a relatively simple manufacturing process. The offset pattern is systematic rather than random, facilitating automated manufacturing and assembly.
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 precise and localized hair removal on sensitive areas with a narrow epilation zone, improving accessibility and user control, particularly on the face and narrow regions.
Implementation Method 1
a central shaft carried by a longitudinal axis and comprising at least one cam having at least one groove, a substantially cylindrical cage of revolution around the longitudinal axis... each tear-off gripper comprising a single tearing blade... guided by the at least one groove of the cam
Implementation Method 2
a substantially cylindrical cage of revolution around the longitudinal axis, intended to be driven in rotation around the longitudinal axis by the electric motor
Data Source
Figure 1~2
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Figure 5
AI summary
The present invention relates to a hair removal head for a hair removal device equipped with an electric motor, comprising a roller (1) having: a central shaft carried by a longitudinal axis and comprising at least one cam having at least one groove, a substantially cylindrical cage of revolution about the longitudinal axis, intended to be driven in rotation about the longitudinal axis by the electric motor, a plurality of plucking rows arranged around the periphery of the cage, each plucking row comprising a single plucking clamp movably mounted on the cage and guided by at least one groove of the cam, each plucking clamp comprising a single plucking blade, a plurality of longitudinal bars (17) arranged respectively opposite the plurality of plucking rows radially outwards,each longitudinal bar (17) comprising a through orifice (18) having a support element extending radially with respect to said bar (17), the plucking blade of the plucking gripper of the corresponding plucking row being arranged to pass through said through orifice (18) and to bear against the support element so as to alternately pinch hairs on the support element and release them during the rotational movement of the cage (10) with respect to the central shaft in which the through orifices (18,18') of two adjacent bars (17,17') are longitudinally offset and have an overlap delimiting a circumferential hair removal zone.