Shaving Razor Handle Geometry for Pubic Hair Control
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Solution Overview
Problem
Existing shaving razors designed for facial hair removal are ineffective and unsafe for pubic hair removal due to complex anatomical curves, skin mobility, and unique hair characteristics, lacking ergonomic design for proper control and precision.
Innovation Solution
A shaving razor system with a handle and cartridge configuration that allows for a neutral position on the shave plane, featuring a concave lower surface and convex upper surface with recessed areas for improved grip and control, ensuring the cartridge ejection button is not accidentally activated during use.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a traditional safety razor handle design is used, then the razor can be manufactured with standard dimensions, but it cannot provide proper control and precision for pubic hair removal
Solution Approach 1:
The handle is designed with an asymmetric configuration where the distal end has a lowermost surface that is closer to the shave plane than the proximal end. This asymmetric geometry allows the razor to be positioned at optimal angles for accessing the pubic region, enabling better control and precision while maintaining manufacturability with standard dimensions.
Solution Approach 2:
The patent introduces a dimensional variation in the handle's vertical profile, creating a gradient in distance from the shave plane from proximal to distal end. This dimensional change enables the handle to accommodate the complex anatomy of the pubic region by allowing the user to position the razor at multiple angles and depths simultaneously.
2Ease of operation
If the handle is made shorter for better handling in restricted areas, then ease of manipulation improves, but control precision may be compromised
Solution Approach 1:
The handle is designed with a flexible balance between length and ergonomics, featuring a distal end that can be positioned close to the shave plane for precision work while maintaining overall handle length that provides adequate grip and control. The ergonomic contours and recessed areas enhance user grip stability, allowing precise control even with optimized length for restricted areas.
3Ease of manufacture
If the cartridge ejection button is accessible from the outside, then cartridge replacement is easy, but accidental activation during use occurs
Solution Approach 1:
The cartridge ejection button is positioned within a recessed area on the handle, creating an intermediary structure that protects the button from accidental activation during shaving while still allowing intentional cartridge replacement. The recessed area acts as a mediator that requires deliberate user action to access and activate the button, preventing unintended ejection during use.
4Ease of manufacture
If the razor is designed for facial hair removal, then manufacturing standards are met, but it is ineffective for pubic hair due to different hair characteristics and anatomy
Solution Approach 1:
The razor system incorporates local quality adjustments through the handle's distal end geometry, which is specifically optimized for pubic region access. The lowermost surface at the distal end is positioned closer to the shave plane, creating a localized geometric feature that enables effective engagement with pubic hair while maintaining standard manufacturing processes for the overall razor structure.
Data Source
AI summary
A shaving razor system with a shaving razor cartridge having a shaving surface in a neutral position on a shave plane. A shaving razor handle having a distal end and a proximal end mounted to the shaving razor cartridge. The distal end has a lowermost surface spaced apart from the shave plane by a distance less than 45 mm.