Shaving Blade Floatable Retention via Friction and Bias
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Solution Overview
Problem
Conventional wet shaving razors with multiple blades and increased guard areas make it difficult for users to achieve a precise shave due to obstructed visibility of the skin surface, and the clips used to secure blades hinder visibility further, compromising shave precision and safety.
Innovation Solution
A shaving blade unit with a floatably secured cartridge design featuring a housing with a resilient member that provides a forward biasing force to maintain contact between the shaving blade and the cartridge side wall, eliminating the need for clips and enhancing skin contact area visibility during shaving.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If clips are used to secure shaving blades to the cartridge housing, then the blades are kept securely attached to the razor cartridge, but the clips block the view of certain portions of the skin surface, making precise shaving more difficult
Solution Approach 1:
The patent removes the clips entirely from the cartridge design. Instead of using clips to secure the blade, the blade is held in place by friction between the blade's side walls and the cartridge housing, allowing unobstructed visibility of the skin surface while maintaining blade security.
Solution Approach 2:
The cartridge housing is designed with specific friction surfaces that segment the blade retention function from the visibility area. The side walls of the cartridge create localized friction zones that secure the blade without extending into the visual field of the user.
2Reliability
If multiple blades are incorporated into wet shaving razors, then users are provided with a closer shave and increased guard area, but it becomes more difficult to see the skin surface being shaved
Solution Approach 1:
The patent removes the obstructing clips that previously blocked the view, allowing users to see the skin surface even with multiple blades present. The friction-based retention system replaces the visual obstruction without compromising the multi-blade shaving precision.
3Reliability
If clips are used to secure shaving blades, then blade attachment is ensured, but manufacturing complexity and costs increase
Solution Approach 1:
The patent eliminates the clips and their associated mounting structures, simplifying the manufacturing process. The friction-based retention system requires fewer parts and assembly steps, reducing manufacturing complexity and costs while maintaining reliable blade attachment.
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
The solution allows for improved visibility and precision during shaving by maintaining contact between the shaving blade and skin surface without clips, ensuring a closer and more comfortable shave while reducing manufacturing complexity and costs.
Implementation Method 1
a resilient member disposed rearward of the shaving blade member and that is secured by a shaving blade member retainer; and wherein said resilient member provides a forward biasing force to the shaving blade member
Data Source
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AI summary
A shaving blade unit (10) comprising a shaving cartridge (15) having a floatably secured shaving blade member (20) wherein said cartridge comprises: a) a housing (25) with a front wall (26), a rear wall (27), and opposing side walls (28) extending between said front and rear walls; b) said shaving blade member having opposing ends (21) with a shoulder (22) at each end and wherein said shoulder rests along said side wall and wherein a cutting edge (23) of said shaving blade member is facing a front surface (25a) of said housing; c) a resilient member (30) disposed rearward of said shaving blade member and that is secured by a shaving blade member retainer (35); and wherein said resilient member provides a forward biasing force to said shaving blade member such that said contact between said shoulder and said side wall is at least maintained when said unit is removed from a skin surface during shaving.