Electric Beard Trimmer Cutter System Rigid Support Ribs
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Solution Overview
Problem
Existing cutter systems for electric shavers and trimmers face challenges in achieving close and thorough hair cutting while minimizing skin irritation, energy consumption, and maintaining low friction between cutting elements, which often result in pulling and tugging of hair.
Innovation Solution
A support structure with rigid support ribs is used to keep the cutting elements close without generating high friction, allowing for precise positioning and movement of the inner cutting element relative to the outer cutting element, reducing friction and heat generation while preventing hair clamping.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the cutting elements are pressed close together to achieve thorough hair cutting, then cutting effectiveness is improved, but friction and heat generation increase
Solution Approach 1:
The support structure is divided into multiple support points distributed across the cutting element, rather than using a single contact point. This segmentation allows the cutting elements to be held close together for effective cutting while distributing the friction forces across multiple points, reducing overall heat generation and energy loss.
2Reliability
If the cutting elements are held close together to prevent hair pulling, then cutting quality is improved, but friction between elements increases
Solution Approach 1:
The support structure incorporates features that provide support in multiple dimensions - vertical support to hold cutting elements close together for quality cutting, and lateral guidance features that maintain proper alignment. This multi-dimensional support approach ensures cutting quality while minimizing friction through optimized geometric relationships between support surfaces.
3Reliability
If spring arms are used to bias the inner cutting element against the outer cutting element to avoid hair tugging, then cutting reliability is improved, but friction and energy consumption increase
Solution Approach 1:
The invention extracts and eliminates the spring mechanism from the cutting element support system. Instead of using elastic biasing forces, the design employs rigid or semi-rigid support structures that maintain the necessary contact pressure between cutting elements through geometric constraints and rigid body mechanics, thereby eliminating continuous energy consumption while maintaining cutting reliability.
4Object-affected harmful factors
If the cutting elements are maintained in close contact to reduce hair pulling, then skin comfort is improved, but heat generation increases
Solution Approach 1:
The support structure provides localized support at specific points along the cutting elements rather than continuous contact. This allows the cutting elements to be held close together at critical cutting zones to prevent hair pulling, while maintaining small gaps or reduced contact pressure in non-critical areas, thereby minimizing overall heat generation while maintaining skin comfort.
Data Source
AI summary
A cutter system for an electric shaver and/or trimmer, having a pair of cooperating cutting elements with two rows of comb-like cutting teeth at opposite edges thereof and at least one field of cutting perforations between the rows of comb-like cutting teeth. The cutting elements are movably supported relative to each other by a support structure with an inner one of the cutting elements being sandwiched between an outer one the cutting element and the support structure. The support structure includes a pair of outer frame portions and a pair of inner frame portions supporting the inner cutting element. The inner frame portions form rigid support ribs extending from a base portion of the support structure at a steeper angle than the outer frame portions and forming rigid support edges supporting the inner cutting element along the outer edge of the field of cutting perforations.