Razor Handle Protrusions Limit Cartridge Pivoting
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Solution Overview
Problem
Existing shaving razor handles with shell bearings lack robust control over the range of motion of the razor cartridge, potentially leading to detachment or inadequate pivoting, especially under extreme consumer use conditions.
Innovation Solution
The razor handle features inner bearing surfaces with protrusions that engage the razor cartridge, limiting its pivotal movement and providing a more robust control over the range of motion while allowing smooth pivoting, using a combination of inner and outer bearing surfaces and protrusions to secure the cartridge in place.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If outer surface stops are used on shell bearings to control cartridge range of motion, then the cartridge can be controlled to pivot within a limited range, but the stops may break under extreme consumer use conditions or allow detachment
Solution Approach 1:
The patent inverts the conventional design by placing stops on the inner bearing surface rather than the outer surface. The inner bearing surface stops engage with the outer bearing surface of the cartridge, reversing the typical stop placement to achieve more robust control that withstands extreme use conditions without breaking or allowing detachment.
Solution Approach 2:
The patent applies different stop configurations to different locations on the bearing surfaces. Inner bearing surface stops are positioned at specific locations to control pivotal movement in particular directions, while outer bearing surface stops are positioned to control movement in other directions, creating localized control zones that collectively provide comprehensive range of motion control.
2Reliability
If robust stops are added to control cartridge range of motion, then detachment is prevented, but the cartridge pivoting smoothness may be compromised
Solution Approach 1:
The patent segments the bearing surfaces into inner and outer surfaces, each with their own stops positioned at different locations. This segmentation allows the inner stops to prevent detachment while the outer stops maintain smooth pivoting, as each set of stops operates independently to control different aspects of cartridge movement.
Solution Approach 2:
By positioning stops at specific local locations on the inner and outer bearing surfaces, the patent creates localized control zones that prevent detachment without interfering with the overall smooth pivoting motion. The stops are strategically placed to only engage when necessary to prevent detachment, allowing free movement during normal pivoting.
Data Source
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AI summary
A razor handle comprising a main body and a head at one end of the main body. The head may comprise one or more inner bearing surfaces for pivotally engaging with a razor cartridge and one or more protrusions disposed on the one or more inner bearing surfaces. Also provided is a razor system comprising the razor handle and a razor cartridge pivotally coupled to the razor handle. The razor cartridge engages the one or more protrusions to limit pivotal movement of the razor cartridge with respect to the head.