Rotational Razor Handle for Controlled Shaving Force
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Solution Overview
Problem
Existing shaving razors with rigid handles often result in either skin irritation from excessive force or inadequate shaving due to insufficient force application, as the normal force applied by the user is directly transferred to the blade cartridge, making it difficult to achieve a safe and desirable shave.
Innovation Solution
A razor handle design featuring a grip portion, a pivotally attached cartridge mount portion, a biasing element, and a lock mechanism that allows the cartridge mount to rotate between positions, enabling controlled force application and conformance to skin contours, thereby optimizing the shaving experience.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a rigid handle is used to transfer normal force directly to the blade cartridge, then the structure is simple and stable, but the user cannot control the force application precisely, resulting in either skin irritation from excessive force or inadequate shaving from insufficient force
Solution Approach 1:
The handle incorporates a rotatable portion that allows dynamic adjustment of the blade cartridge angle relative to the handle axis. This rotational freedom enables the user to adapt the shaving angle to different skin contours while maintaining controlled force application, transforming the static rigid structure into a dynamic adaptable system
Solution Approach 2:
The handle is divided into distinct functional segments: a grip portion and a rotatable portion with the blade cartridge. This segmentation allows independent movement of the blade cartridge relative to the grip, enabling force control through rotational adjustment while keeping the grip structure simple and stable
2Adaptability or versatility
If the blade cartridge is allowed to rotate relative to the handle to conform to skin contours, then skin adaptability is improved, but the structure becomes more complex with additional rotational mechanisms
Solution Approach 1:
The rotatable portion enables the blade cartridge to dynamically adjust its orientation relative to the handle axis, allowing the shaving surface to conform to various skin contours and angles while maintaining a relatively simple mechanical implementation
Solution Approach 2:
The rotation mechanism adds an angular dimension to the blade cartridge positioning, allowing it to pivot around an axis perpendicular to the blade edge. This dimensional addition enables skin conformance without requiring complex multi-axis mechanisms
3Adaptability or versatility
If the cartridge mount portion is free to rotate to allow angle adjustment, then shaving adaptability is improved, but the structural stability and force control are reduced
Solution Approach 1:
The cartridge mount portion is designed with rotational freedom around a pivot axis, allowing dynamic angle adjustment during shaving. This dynamic capability enables adaptability to skin contours while maintaining structural integrity through a well-defined pivot mechanism
Solution Approach 2:
The handle is segmented into a stable grip portion and a rotatable cartridge mount portion. This segmentation isolates the rotational freedom to the cartridge mount while keeping the grip portion structurally stable and simple
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 design allows for a consistent and controlled application of force, reducing skin irritation and ensuring a desirable shave by allowing the blade cartridge to pivot and adjust its angle relative to the skin, thus enhancing shaving efficiency and comfort.
Implementation Method 1
The at least one biasing element is configured to apply a biasing force against the cartridge mount portion that biases the cartridge mount portion in the normal first position
Data Source
AI summary
A razor handle for mounting a razor cartridge having at least one razor blade, which cartridge is pivotable about a cartridge pivot axis, is provided. The razor handle includes a grip portion, a cartridge mount portion, at least one biasing element, and a lock mechanism. The cartridge mount portion is pivotally attached to the grip portion and is rotatable about a cartridge mount pivot axis. The cartridge mount pivot axis is substantially parallel to the cartridge pivot axis. The at least one biasing element is configured to apply a biasing force against the cartridge mount portion that biases the cartridge mount portion in the normal first position. The lock mechanism is selectively translatable between a lock position and at least one unlocked position.