Rotatable Blade Assembly with Multi-Facet Lubricating Elements
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Solution Overview
Problem
Conventional shaving blade assemblies with lubricating strips have a shorter lifecycle due to uneven access to lubricating surfaces, as only one surface is typically used during shaving, leading to premature wear of the lubricating strip before the razor blades are damaged or dull.
Innovation Solution
A rotatable blade assembly with multiple facets, each equipped with a lubricating element, allowing users to select and change the lubricating surface as needed, featuring a locking mechanism and spring configuration for secure positioning during shaving.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a single lubricating strip is used on the razor head, then the structure is simple and easy to manufacture, but the lubricating strip wears off prematurely before the razor blades become dull
Solution Approach 1:
The lubricating system is divided into multiple independent lubricating strips (first lubricating strip, second lubricating strip, etc.) arranged on different facets of the rotatable body. Each strip can be used independently and replaced separately, extending the overall service life of the lubricating system while maintaining manufacturing simplicity through modular design.
Solution Approach 2:
The lubricating strips are arranged on a rotatable body that can rotate about a longitudinal axis, allowing dynamic selection and access to different lubricating strips during shaving. This dynamic configuration enables users to switch between multiple lubricating surfaces, extending the effective service life beyond what a single static strip could provide.
2Device complexity
If only one surface of the lubricating strip contacts the skin, then the structure is simple, but the lubricating strip has uneven wear and shorter lifecycle
Solution Approach 1:
The lubricating system is segmented into multiple independent strips on different facets, each capable of contacting the skin. This segmentation distributes the wear across multiple surfaces rather than concentrating it on one, extending the overall lifecycle while keeping each individual strip's configuration simple.
Solution Approach 2:
The lubricating strips are arranged on different facets of a rotatable body, adding a rotational dimension to the previously linear single-strip configuration. This dimensional change allows multiple surfaces to contact the skin over time, distributing wear evenly across all facets and extending service life without complicating the basic strip structure.
3Duration of action of moving object
If multiple lubricating strips are provided on different facets, then the service life is extended and adaptability is improved, but the device complexity increases
Solution Approach 1:
Multiple lubricating strips with different lubricious compositions are provided on different facets of the rotatable body, allowing the same structural element to serve multiple functions. Each facet can be optimized for different shaving conditions or skin types, extending the blade assembly's useful life and adaptability without proportionally increasing overall complexity.
Solution Approach 2:
The rotatable body enables dynamic access to multiple lubricating strips, allowing users to rotate and select different facets based on shaving needs. This dynamic mechanism extends service life and provides adaptability while maintaining relatively simple construction through a single rotational degree of freedom rather than multiple independent mechanisms.
4Duration of action of moving object
If the lubricating strip is made replaceable, then the service life can be extended, but the ease of operation decreases due to additional locking mechanisms
Solution Approach 1:
The lubricating strips are designed as separable, replaceable components that can be independently exchanged. This segmentation allows users to replace only the worn lubricating strip rather than the entire blade assembly, extending service life while keeping the replacement process simple and focused on a single component rather than a complex multi-part system.
Data Source
AI summary
A blade assembly includes a housing having a recess defining a first wall on a first side of the housing and a second wall on a second side of the housing, an elongated body that is attached to the first and second walls and is rotatable about a longitudinal axis (S-S), the elongated body having two or more facets, at least one of the facets has a lubricating element disposed thereon, and a locking mechanism for releasably locking the body in a use position.