Shaving Head Lubrication Layout for Longer Glide Life
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Solution Overview
Problem
Conventional razors provide inadequate lubrication during shaving, leading to discomfort, nicks, and cuts due to the rapid wear-out of lubricating strips, which do not align with the lifespan of the blades.
Innovation Solution
A shaving head design with shaving aid portions covering at least 50% of the surface, ensuring extended durability and improved glide, reducing the risk of nicks and cuts, and aligning the longevity of the shaving aid with the blades' sharpness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of moving object
If conventional lubricating strips are used in traditional razors, then the structure is simple and easy to manufacture, but the lubrication duration is short and wears out before the blades become dull
Solution Approach 1:
The shaving aid is divided into multiple discrete portions positioned at the front, rear, and sides of the cutting elements. This segmentation allows each portion to independently provide lubrication over extended periods, collectively achieving prolonged lubrication duration without requiring a single complex lubrication system.
Solution Approach 2:
Different regions of the shaving head are equipped with shaving aid portions tailored to their specific functions - front portions provide initial lubrication, rear portions maintain lubrication during the stroke, and side portions ensure coverage during angled shaves. This local optimization extends overall lubrication duration while keeping each local component simple.
2Ease of operation
If the shaving aid coverage is increased to at least 50% of the shaving head surface, then the glide is enhanced and comfort is improved, but the amount of material and complexity increases
Solution Approach 1:
The shaving aid material is distributed across multiple discrete portions rather than using a single large continuous strip. This segmentation achieves comprehensive surface coverage (at least 50%) while using less total material, as each portion is optimized for its specific location and function, eliminating material waste from unused areas.
Solution Approach 2:
Multiple shaving aid portions at different locations (front, rear, sides) are combined to work together as an integrated lubrication system. This merging achieves enhanced glide through comprehensive coverage while optimizing material usage, as each portion contributes to the overall lubrication effect without requiring excessive material in any single location.
3Object-affected harmful factors
If conventional lubricating strips with limited coverage are used, then the device complexity is low, but the lubrication is inadequate leading to discomfort and skin irritation
Solution Approach 1:
The shaving aid is segmented into multiple portions positioned to cover front, rear, and side areas of the cutting elements. This segmentation ensures comprehensive skin coverage during various shaving angles and strokes, reducing skin irritation by eliminating uncovered areas where friction would occur, while keeping each individual portion structurally simple.
Solution Approach 2:
Shaving aid portions are strategically placed in specific locations where they are most needed - front portions for initial contact, rear portions for glide maintenance, and side portions for angled coverage. This local optimization reduces skin irritation in each specific region without requiring a uniformly complex structure across the entire shaving head.
4Duration of action of stationary object
If the shaving aid portions cover at least 50% of the shaving head surface, then the useful life of the shaving head is prolonged, but the manufacturing complexity increases
Solution Approach 1:
The shaving aid is manufactured as multiple separate portions that can be independently produced and then assembled onto the shaving head. This segmentation allows each portion to be manufactured using simple, standardized processes, and the assembly of multiple small portions is more manageable than manufacturing and applying a single large complex lubrication system, thereby prolonging useful life without significantly increasing manufacturing complexity.
Data Source
Figure 1~3
Figure 4A~4B
Figure 5
AI summary
A shaving head comprising a front section having a front edge, a rear section having a rear edge and a pair of side sections extending between the front and the rear sections, one or more cutting elements mounted between the front and the rear sections within a recess of the shaving head. The recess, the front section, the rear section and the side sections define a shaving head surface. The shaving head comprises a first shaving aid portion extending from the recess to the front edge and a second shaving aid portion extending from the recess to the rear edge. The first shaving aid portion and the second shaving aid portion cover at least 50% of the shaving head surface.