Adjustable Shaving Blade Assembly with Rack-and-Pinion Pressure Control
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Solution Overview
Problem
Existing shaving blade assemblies with pivoting blades face issues of reduced shaving efficacy and difficulty in cleaning due to narrowed blade spacing when adjusted for more sensitive shaving, and lack individual springing capability.
Innovation Solution
A shaving blade assembly featuring a first resilient element and a rack-and-pinion mechanism to adjust pressure on the blades, with optional counter-spring blade retainers and detent mechanisms for precise control of blade exposure, allowing for bolder or more sensitive shaves without compromising cleaning efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If pivoting blade arrangements are used to achieve more sensitive shaving, then blade pressure and angle of attack can be adjusted, but the space between adjacent parallel blades narrows which decreases shaving efficacy and makes cleaning more difficult
Solution Approach 1:
The blade assembly is divided into multiple independent parallel blades, each capable of individual pressure adjustment through the resilient element mechanism. This segmentation allows each blade to maintain optimal spacing while providing customizable pressure distribution across different blades, resolving the contradiction between adjustable sensitivity and shaving efficacy.
2Adaptability or versatility
If pivoting blade arrangements are used to achieve more sensitive shaving, then blade pressure can be adjusted, but cleaning becomes more difficult
Solution Approach 1:
Each blade is independently mounted with its own resilient element, creating modular segments that can be individually accessed and cleaned. This segmentation maintains consistent blade spacing and provides clear channels for cleaning solutions to reach all blade surfaces, making cleaning easier while preserving adjustment capability.
3Adaptability or versatility
If resilient elements are added to individually spring blades, then blade pliancy can be adjusted, but device complexity increases
Solution Approach 1:
The resilient elements provide continuous variable adjustment of blade pliancy through their elastic properties. By changing the physical parameter of spring constant in the resilient elements, the system achieves adjustable blade pliancy without complex mechanical mechanisms, resolving the contradiction between adaptability and simplicity.
4Manufacturing precision
If rack-and-pinion mechanism is used for precise pressure adjustment, then manufacturing precision improves, but device complexity increases
Solution Approach 1:
The rack-and-pinion mechanism replaces complex multi-component adjustment systems with a simple integrated unit where the pinion gear engages directly with the rack on the resilient element carrier. This substitution provides precise pressure adjustment through rotational-to-linear motion conversion while minimizing the number of parts and assembly steps, resolving the contradiction between precision and complexity.
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
Enables highly precise adjustment of blade pliancy and exposure, providing a customizable shaving experience with improved cleaning efficiency and reduced risk of overstressing the mechanism.
Implementation Method 1
a first resilient element pressing the blade against the blade retainers in a first direction along a first axis
Implementation Method 2
a first rack-and-pinion mechanism with a rack operationally coupled to the first resilient element and a pinion for actuating a motion of the rack along the first axis
Implementation Method 3
the blade retainers may be resilient so as to act as counter-springs to the first resilient element. The blade exposure may thus be further adjusted or controlled through a resilient deformation of the blade retainers
Data Source
AI summary
A shaving blade assembly is provided. The shaving blade assembly comprises a blade, one or more blade retainers, a first resilient element pressing the blade against the blade retainer in a first direction along a first axis that is orthogonal to a cutting edge of the blade, and a first rack-and-pinion mechanism with a rack operationally coupled to the first resilient element and a pinion for actuating a motion of the rack along the first axis.