Blade Assembly Laser Marking for Skin Guard Adhesion
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Solution Overview
Problem
Existing razors face challenges in maintaining a durable and effective skin guard element attachment to stainless steel blades and supports, leading to issues with rinsability and skin irritation.
Innovation Solution
A blade assembly featuring a laser marked area on the blade or blade support, combined with a protruding element containing a water-insoluble component, which enhances adhesion and durability by modifying the stainless steel surface energy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If skin guard elements are attached to stainless steel blades using conventional adhesives, then the razor provides skin protection and improved rinsability, but the adhesion is weak and the skin guard element detaches during use
Solution Approach 1:
The patent applies a laser marked area to the stainless steel blade surface before attaching the skin guard element. This preliminary surface modification creates enhanced adhesion properties that ensure durable attachment throughout the razor's使用寿命, eliminating the detachment problem without requiring complex multi-step coating processes.
Solution Approach 2:
The patent replaces conventional chemical adhesive bonding with a laser-marked surface attachment mechanism. The laser marked area on the stainless steel blade provides enhanced mechanical interlocking and adhesion for the skin guard element, substituting the need for complex chemical coating processes while achieving more reliable attachment.
2Reliability
If adhesion promoters such as primers and conversion coatings are used to promote adhesion of skin guard elements on stainless steel, then the attachment strength is improved, but the manufacturing process becomes more complex and costly due to the separate coating process
Solution Approach 1:
The patent combines the surface preparation and adhesion enhancement steps into a single laser marking process. The laser marked area simultaneously prepares the stainless steel surface and creates the adhesion-enhanced zone for skin guard element attachment, eliminating the need for separate primer or conversion coating processes and their associated complexity.
Solution Approach 2:
The patent replaces the multi-step chemical coating process (primer/conversion coating) with a laser-based surface modification process. This substitution achieves equivalent or superior adhesion strength while significantly simplifying the manufacturing process by eliminating separate coating steps, drying, and curing operations.
3Object-affected harmful factors
If the inter-blade span is decreased to improve skin stretching and prevent skin bulging, then skin irritation is reduced, but the rinsability deteriorates due to reduced space for water and shaving debris flow
Solution Approach 1:
The patent segments the blade structure by adding skin guard elements that create localized protective zones. These elements divide the continuous blade surface into segments, allowing the inter-blade span to remain small for skin protection while creating channels and gaps that maintain water and debris flow for good rinsability.
Solution Approach 2:
The patent applies skin guard elements at specific locations on the blade where they provide localized skin protection and stretching. This local quality approach allows the blade to maintain small inter-blade spans overall while creating specific zones that enhance skin care functionality without compromising the overall rinsability of the razor.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution provides improved shaving performance in terms of comfort and safety, with enhanced rinsability and prolonged attachment of the skin guard element, resulting in a longer-lasting razor.
Implementation Method 1
a laser marked area on the at least one blade and/or on the at least one blade support
Implementation Method 2
enhances adhesion and durability by modifying the stainless steel surface energy
Data Source
Figure 1~2
Figure 3~4
Figure 5~6
AI summary
The present disclosure relates to a blade assembly (5) comprising at least one blade support (1), the at least one blade support (1) having a flat portion (1a) and a base portion (1b), the flat portion (1a) of the at least one blade support (1) comprising an upper surface (1a') and a lower surface (1a"); at least one blade (2) having a cutting edge portion, the blade (2) being in contact with the flat portion (1a) of the at least one blade support (1); a laser marked area (3) on the at least one blade (2) and/or on the at least one blade support (1); and a protruding element (4) attached to the laser marked area (3), wherein the protruding element (4) comprises a water-insoluble component. The present disclosure further relates to a razor cartridge, a razor and a kit of parts.