Rotatable Blade Cartridge for Shaving Devices
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Solution Overview
Problem
Conventional shaving razors lack a mechanism for easy blade cartridge rotation and adjustment, leading to inefficient shaving and increased effort due to the fixed orientation of blade cartridges, which can result in missed hairs and the need for additional strokes.
Innovation Solution
A personal shaving device with a pivotable blade cartridge that can rotate up to 360 degrees, featuring a resistive pivot mechanism and cushioning mechanism, allowing users to select between multiple blade faces and adjust the cartridge orientation relative to the handle for optimal skin contact.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the blade cartridge is fixed in orientation, then the device structure is simple, but the shaving efficiency is reduced due to limited blade surface contact with skin
Solution Approach 1:
The blade cartridge is made rotatable relative to the handle through a pivot mechanism, transforming the fixed orientation into a dynamic, adjustable configuration. This allows the blade surface to adapt its angle and contact area with the skin during shaving, improving shaving efficiency without requiring complete redesign of the device structure
Solution Approach 2:
The shaving device is divided into separable components: a handle and a rotatable blade cartridge assembly. The cartridge can be independently rotated and adjusted relative to the handle, allowing optimization of blade orientation while maintaining overall structural simplicity through modular design
2Adaptability or versatility
If the blade cartridge can rotate 360 degrees, then the adaptability to different skin contours is improved, but the device complexity increases due to additional pivot mechanisms
Solution Approach 1:
The pivot mechanism enables dynamic rotation of the blade cartridge through a full 360 degrees, allowing the blade to adapt to various skin contours and shaving directions. The mechanical pivot design provides smooth rotational movement while maintaining structural simplicity through well-established hinge principles
Solution Approach 2:
The rotatable cartridge mechanism serves multiple functions: it enables adaptation to different skin contours, allows selection of different blade faces, and permits adjustment of blade angle. This single pivot mechanism provides universal adaptability for various shaving scenarios without requiring multiple separate adjustment systems
3Productivity
If multiple blade faces are provided, then the shaving coverage is improved, but the manufacturing complexity increases
Solution Approach 1:
The blade cartridge is designed with multiple distinct blade faces, each optimized for different shaving directions and skin areas. This segmentation of cutting functions across multiple faces allows comprehensive shaving coverage while maintaining relatively simple manufacturing of individual blade units that can be assembled in various orientations
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
Enhances shaving efficiency by ensuring maximum blade surface contact with the skin, reducing missed hairs and the need for additional strokes, while also being environmentally friendly due to reduced material usage and packaging requirements.
Implementation Method 1
A compression spring may be disposed within the cylindrical recess and configured to resiliently engage the cylindrical rod and urge the cylindrical rod in the second direction
Implementation Method 2
The blade cartridge may include a rotation limiter including a pawl configured to engage a tooth
Data Source
AI summary
A shaving device comprising a head assembly having a support member and a blade cartridge. The support member is configured to be detachably coupled to a handle. The blade cartridge has a first and a second face wherein at least one of the first or second faces comprises at least one razor blade. The blade cartridge is configured to be rotatably coupled to the support member about a pivot axis such that the blade cartridge is pivotable by a user to select one of the first or second faces.