Epilation Head Roller With Individual Cam Actuation
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Solution Overview
Problem
Existing depilatory devices with rigidly linked movable blades experience unequal force distribution among clamps, leading to inconsistent efficiency, and lack a fast and robust hair removal mechanism.
Innovation Solution
A depilatory device with a tubular cage carrying independent movable blades, each equipped with individual return springs and cams, allowing controlled movement and balanced force application, ensuring all clamps operate with equal efficiency and rapid closure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If several movable blades are rigidly linked together, then the structure is simplified and easier to manufacture, but the force distribution among clamps becomes unequal and efficiency varies
Solution Approach 1:
The patent divides the movable blades into independent units, each with its own return spring and cam mechanism. This segmentation allows each blade to operate independently with equal force distribution, resolving the efficiency consistency issue while maintaining manufacturing simplicity through modular design
Solution Approach 2:
Each movable blade is equipped with its own return spring and cam mechanism, creating local independence. This ensures that each clamp receives equal force from its dedicated spring, eliminating the force distribution inequality that occurs when blades are rigidly linked
2Volume of moving object
If multiple movable blades are rigidly linked, then the device structure is more compact, but the clamping force distribution becomes uneven
Solution Approach 1:
The patent segments the force application mechanism so that each movable blade has its own return spring. This ensures equal clamping force distribution across all blades while the overall compact design is maintained through the shared tubular cage structure and centralized cam mechanism
Solution Approach 2:
The return springs are arranged radially around the central shaft in the axial dimension, allowing multiple independent force application points within a compact radial footprint. This dimensional arrangement enables equal force distribution without increasing device volume
3Speed
If individual cams are used for each movable blade, then the closing speed of clamps is improved, but the device complexity increases
Solution Approach 1:
Each movable blade has its own cam mechanism, allowing independent and rapid closure action. The segmentation enables fast closing speed for each clamp while the overall device complexity is managed through the standardized, modular cam design that can be replicated for each blade
Solution Approach 2:
The cam mechanisms are designed to act periodically during the rotation of the tubular cage, providing rapid impulse forces for quick clamp closure. This periodic action achieves high closing speed while thecams return to their initial positions, ready for the next cycle, managing complexity through rhythmic, predictable motion
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 ensures consistent and efficient hair removal by distributing clamping force evenly across all blades, enhancing the device's robustness and speed.
Implementation Method 1
return springs intended to bring the movable slats into the closed position
Implementation Method 2
for each movable slat, an individual cam which is linked in translation to said slat and which, for the opening of the movable slat, moves against a cam track
Data Source
Figure 1~2
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Figure 5~4
AI summary
The invention relates to an epilation head roller for a motor-driven epilation device, comprising: a stationary central shaft (20) intended to be rotatably connected to a housing of the epilation device; a tubular cage (21) which can rotate about the central shaft (20), rotated by a motor of the device, and which bears tweezers (15), each formed by a stationary blade (25) rigidly connected to the tubular cage (21) and a moving blade (26) that can move between an open position (O) in which the moving blade (26) is at a distance from the stationary blade (25) and a closed position (F) in which the moving blade is in contact with the stationary blade (25); and means for manoeuvring the moving blades (26) between the open (O) and closed (F) positions during the rotation of the tubular cage (21) about the central shaft (20). According to the invention, the manoeuvring means comprise: return springs (34) intended to return the moving blades (26) to the closed position; and, for each moving blade (26), an individual cam (35) which is translatably connected to the blade and which, in order to open the moving blade (26), moves against a cam track (37) provided on the periphery of the central shaft (20).