Pivotable Shaving Cutting Element Assembly for Contour Following
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Solution Overview
Problem
Existing shaving devices face challenges in achieving high drive stiffness while allowing for automatic contour following without the need for complex constructions or heavy driving sources, as they often require bulky components that hinder user convenience and effective contour adaptation.
Innovation Solution
The shaving device features a pivotable cutting element arrangement about an axis intersecting the contact points of the driving member and cutting element, with convex and planar contacting surfaces to maintain high stiffness and minimize friction, enabling accurate contour following without bulky components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a complex construction with multiple components is used to enable pivoting movement for contour following, then automatic contour following capability is improved, but device complexity increases
Solution Approach 1:
The shaving device is divided into a stationary body housing and a separate, movable cutting element assembly that can pivot independently. This segmentation allows the cutting elements to follow skin contours while the main body remains simple and easy to hold, resolving the contradiction between contour following capability and device complexity
Solution Approach 2:
The pivoting mechanism is extracted from the main body housing and integrated into the cutting element assembly itself. By taking out the complex pivoting components from the stationary part and placing them in the movable cutting head, the main body remains simple while the cutting head gains automatic contour following capability
2Strength
If heavy driving sources are used to maintain high drive stiffness, then drive stiffness is improved, but weight of moving object increases
Solution Approach 1:
The patent replaces heavy mechanical driving sources with a lighter electromagnetic motor that achieves high drive stiffness through optimized magnetic field interaction and precise control. This substitution maintains the necessary driving force and stiffness while significantly reducing the weight of the moving components
Solution Approach 2:
The patent optimizes parameters such as motor torque density, magnetic field strength, and control frequency to achieve high drive stiffness with a lightweight motor. By changing these parameters rather than relying on mechanical leverage from heavy components, the system achieves stiffness without excessive weight
3Stability of the object's composition
If bulky components are used to ensure structural stability, then structural stability is improved, but ease of operation deteriorates
Solution Approach 1:
The patent applies structural reinforcement and stability features only in the specific locations where they are needed for cutting element support and pivoting, rather than making the entire device bulky. The cutting element assembly has localized structural strength, while the main body remains lightweight and ergonomic for user handling
Solution Approach 2:
The cutting element assembly is designed with dynamic pivoting capability that allows it to adapt to skin contours during use. This dynamic adjustment maintains structural stability during operation while making the device easier to operate by automatically adapting to different shaving areas without requiring the user to apply excessive force or maintain rigid positioning
Data Source
AI summary
A shaving device includes cooperating hair cutting elements and a driver for driving the hair cutting elements. The shaving device is configured to allow for automatic contour following during its application on the skin of a user. At least one cutting element is pivotably arranged in the shaving device, wherein a pivot axis intersects at least one position where the cutting element is contacted by a driving member for imposing reciprocating movement on the cutting element.