Beard Trimmer Comb Unit Dynamics for Uniform Stubble Length
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Solution Overview
Problem
Existing electric shaving apparatuses are not suitable for users seeking to maintain hair at a length between a close shave and a full beard, as they often require multiple orientations and struggle with cutting longer hairs effectively.
Innovation Solution
A beard trimmer with a handle, motor, and head portion featuring a first long hair cutter unit with a comb unit that provides a selectable stubble length, ensuring uniform cutting length independent of user pressure, achieved through a design with a comb unit made of thermoplastic material with specific Elastic Modulus and structural rigidity, allowing for easy attachment and detachment for varying trim lengths.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a comb unit with flexible comb teeth is used, then the comb unit can adapt to skin contours, but the cutting length varies with applied pressure
Solution Approach 1:
The comb unit is designed with flexible comb teeth that can dynamically adapt to skin contours during use, while the attachment to the cutter unit provides structural support that limits excessive flexing. This dynamic design allows the comb to conform to skin surfaces while maintaining sufficient rigidity to ensure uniform cutting length regardless of pressure applied.
2Manufacturing precision
If the comb unit is made rigid, then the cutting length remains uniform, but the comb unit cannot adapt to skin contours
Solution Approach 1:
The comb unit exhibits different mechanical properties in different regions: the comb teeth are made flexible to adapt to skin contours, while the attachment portions connecting to the cutter unit are made rigid to maintain cutting length uniformity. This local differentiation of material properties allows the comb unit to simultaneously achieve adaptability and precision.
3Adaptability or versatility
If multiple orientations are required for use, then hairs can be properly threaded into gaps, but the ease of use is reduced
Solution Approach 1:
The cutting apparatus is divided into modular components including the cutter unit, comb unit, and attachment mechanism. This segmentation allows the comb unit to be easily attached and detached, and the apparatus to be quickly reconfigured for different cutting lengths and orientations, thereby maintaining versatility while improving ease of use.
Data Source
AI summary
A beard trimmer having a handle, a motor and a head portion. The head portion comprises at least a first long hair cutter unit for trimming hair that is provided with a first outer cutter and a first inner cutter.