Pivoting Razor Cartridge Plunger Layout for Unobstructed Rinsing
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Solution Overview
Problem
Conventional razor assemblies face issues with the rinsing region being obstructed by the connector or plunger, hindering effective discharge of shaving residue and limiting design flexibility of the plunger shape.
Innovation Solution
The razor assembly design positions the plunger to not overlap the rinsing area, allowing full exposure and guiding rinsing water across the entire rinsing region, with the plunger's shape independent of the central portion of the cartridge.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the plunger is designed to match the width of the central portion of the cartridge, then the structural coupling between cartridge and handle is maintained, but the rinsing region is obstructed and cleaning performance is reduced
Solution Approach 1:
The plunger is segmented into a head portion and a body portion, allowing the head to be narrower than the central portion of the cartridge. This segmentation enables the plunger to fit within the central portion while leaving the rinsing region unobstructed, thus maintaining structural coupling without compromising cleaning performance
Solution Approach 2:
The plunger head is designed with a width that is less than the width of the central portion of the cartridge, creating a local variation in dimensions. This local quality change allows the plunger to be positioned without obstructing the rinsing region, enabling both structural support and effective rinsing
2Ease of operation
If the plunger width is reduced to avoid obstructing the rinsing region, then rinsing water flow is improved, but the plunger cannot effectively support the cartridge
Solution Approach 1:
The plunger is divided into a head portion with reduced width for unobstructed rinsing and a body portion that maintains sufficient width for structural support. This segmentation allows the plunger to simultaneously enable free water flow and provide adequate pivot restoring force
Solution Approach 2:
The plunger design transitions from a uniform width structure to a multi-dimensional structure with varying widths along its length. The head portion has reduced width while the body portion maintains full width, creating a three-dimensional configuration that satisfies both rinsing and support requirements
3Ease of operation
If the plunger is positioned to fully expose the rinsing region, then discharge of shaving residue is improved, but the design flexibility of the plunger shape is limited
Solution Approach 1:
The plunger is segmented into functional zones: a head portion optimized for minimal obstruction and maximum rinsing exposure, and a body portion that provides structural support and connection to the handle. This segmentation enables both full exposure of the rinsing region and design flexibility in the overall plunger configuration
Data Source
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AI summary
The razor assembly, according to an embodiment of the present invention for solving the described problem, comprises a razor cartridge and a razor handle rotatably supporting the razor cartridge, wherein: the razor cartridge comprises at least one blade, which has a cutting edge, and a blade housing, which has a connector provided on one side thereof and longitudinally accommodates the at least one blade such that the cutting edge is exposed forwardly upward; the blade housing includes a rinse area which passes therethrough in the top-to-bottom direction and in which the at least one blade is disposed longitudinally across; the razor handle comprises a plunger for providing a rotational restoring force to the razor cartridge; the plunger is disposed so as not to overlap the rinse area in a rest position when viewed from the lower side of the blade housing; one side of the plunger is located on a plane spaced apart from the center of the rinse area, by one eighth or more of the length of the rinse area, toward one side of the rinse area; and the other side of the plunger is located on a plane spaced apart from the center of the rinse area, by one eighth or more of the length of the rinse area, toward the other side of the rinse area.