Razor Cartridge Posts Crushed for Blade Stability
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Solution Overview
Problem
Current razor cartridges face issues with costly assembly, blade vibration, and reduced rinse-ability due to complex component alignment and movement during shaving.
Innovation Solution
The introduction of novel posts within the razor cartridge housing that are crushed to provide contact and support to the blades, restricting their movement and reducing vibration, achieved through manual or automated deformation using an anvil or mechanical equipment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If multiple components (blades, guard, cap, clips) are assembled in a traditional razor cartridge, then the cartridge can perform shaving functions, but the assembly becomes costly and complex with alignment issues
Solution Approach 1:
The patent combines multiple traditional razor components (guard, cap, clips, and blade support structures) into a single integrated housing. This housing features a monolithic structure with built-in blade receptacles, guard openings, and positioning features, eliminating the need for separate assembly of these components and their associated alignment requirements.
Solution Approach 2:
The integrated housing serves multiple functions simultaneously: it acts as the structural framework, the guard protective element, the cap cover, the blade mounting structure, and the rinseability feature. This multi-functionality reduces the total component count and simplifies manufacturing.
2Reliability
If traditional assembly methods are used with multiple components, then the cartridge can be manufactured, but blade alignment shifts and vibration occur during shaving
Solution Approach 1:
The housing is pre-formed with precisely engineered blade receptacles and positioning features during the molding process. These features pre-establish the correct blade alignment and positioning, eliminating the need for post-assembly alignment adjustments and ensuring consistent blade stability during shaving.
Solution Approach 2:
The patent transitions from mechanical assembly with tolerances to precision injection molding that achieves sub-millimeter accuracy. The molding process parameters (temperature, pressure, time) are controlled to ensure consistent reproduction of blade receptacle dimensions and positions, resulting in superior alignment stability.
3Ease of operation
If traditional razor cartridge design is used, then the structure is complete, but rinse-ability is restricted
Solution Approach 1:
The housing incorporates porous or perforated regions, particularly in the cap and guard areas, that allow water and debris to pass through during rinsing. These porous sections are integrated into the housing structure itself, providing rinseability without requiring separate components.
Solution Approach 2:
The housing design includes dynamic rinse channels and open architectures that facilitate water flow through the cartridge structure. The geometry of the housing creates natural water pathways that enhance rinsing efficiency while maintaining structural integrity.
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
This solution enhances shaving performance by minimizing blade vibration and deflection, improving rinse-ability, and simplifying the assembly process while potentially reducing manufacturing costs.
Implementation Method 1
the end portions of the plurality of posts are crushed providing contact and support to the front and/or back side of the bottom portion of at least one of the blades
Data Source
Figure 1
Figure 2
Figure 2A
AI summary
The invention discloses a novel razor cartridge (20) including a housing (21) having a top, front and back areas (21a, b, c,), and a bottom (21d), and a plurality of posts (26a, b, c,) each having an end portion (42a, b, c,) extending towards the housing bottom and at least one blade (22a, b, c,) disposed in the housing. Each blade includes a cutting edge and a bottom portion having front and back sides wherein the bottom portion of the blade is disposed adjacent at least one of the plurality of posts. The posts are desirably made of plastic. The end portions of the posts are crushed to provide contact and support to the front and/or back side of the bottom portion of the blades in the housing. The crush force may be up to about lOOlbs- force and the posts are reduced in height by about 20% to about 95%. The crushed posts retain the blades in the housing restricting fore and aft blade movement.