Multi-Axis Razor Assembly with Rotating Spin Housing
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Solution Overview
Problem
Conventional razor cartridges are limited in their ability to pivot about rotational axes perpendicular to the alignment direction of shaving blades, which hinders effective contact with varying skin curvatures during shaving.
Innovation Solution
A razor assembly with multiple rotational axes, featuring a blade housing, a spin housing rotatable about a first axis perpendicular to the longitudinal direction, and a restoring force-providing unit that returns the spin housing to its rest position, along with a second restoring force-providing unit for the blade housing, enabling pivoting about additional axes to conform to skin curvatures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a conventional razor cartridge is used with limited rotational capability, then the structure is simple and easy to manufacture, but the ability to pivot about rotational axes perpendicular to the blade alignment direction is insufficient, hindering effective contact with varying skin curvatures
Solution Approach 1:
The razor cartridge is divided into multiple independently rotatable components: a blade housing that can rotate about a first rotational axis perpendicular to the blade alignment direction, and a cartridge body that can rotate about a second rotational axis. This segmentation allows each component to pivot independently to adapt to different skin curvatures, resolving the contradiction between adaptability and structural simplicity.
Solution Approach 2:
The patent introduces dynamic rotational capabilities to the previously static or limited-pivot razor cartridge. The blade housing and cartridge body are equipped with rotational mechanisms that allow them to pivot about perpendicular rotational axes during shaving, enabling the cutting edges to maintain contact with varying skin surfaces while adding controlled complexity through defined rotational degrees of freedom.
2Adaptability or versatility
If multiple rotational axes are added to enable pivoting about perpendicular axes, then the ability to conform to skin curvatures is improved, but the device complexity and manufacturing difficulty increase
Solution Approach 1:
By segmenting the razor cartridge into distinct rotatable modules (blade housing and cartridge body), each with its own rotational axis, the patent achieves multi-axis pivoting capability. This modular segmentation allows for standardized manufacturing of individual components that can be assembled together, mitigating the manufacturing complexity that would arise from attempting to create a monolithic multi-rotational structure.
Solution Approach 2:
The rotational mechanisms are designed to serve multiple functions: enabling pivoting about perpendicular axes, maintaining cutting edge contact with skin, and providing structural support. This multi-functionality reduces the need for additional specialized components, thereby easing manufacturing while achieving the desired adaptability to various skin curvatures.
3Ease of operation
If restoring force mechanisms are added to return the spin housing to rest position, then the pivoting functionality and skin contact are improved, but the device complexity increases
Solution Approach 1:
The restoring force mechanism is designed to automatically return the blade housing to its rest position after pivoting, without requiring user intervention. The elastic element or spring mechanism self-actuates based on the displacement from the rest position, providing automatic resetting functionality that enhances ease of operation while minimizing the need for complex control systems or additional actuating components.
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 razor assembly effectively maintains close contact with the skin across various curvatures, enhancing shaving efficiency by allowing pivoting motions about multiple rotational axes, thereby improving shaving performance on curved skin surfaces.
Implementation Method 1
a first restoring force-providing unit configured to provide a restoring force for restoring the spin housing to a first rest position when the spin housing is rotated about the first rotational axis relative to the fixing housing
Implementation Method 2
a second restoring force-providing unit configured to provide a restoring force for restoring the blade housing to a second rest position when the blade housing is pivoted about the second rotational axis relative to the connector
Data Source
AI summary
A razor assembly is proposed. The razor assembly may include a blade housing configured to receive at least one or more shaving blades in a longitudinal direction. The razor assembly may also include a connector disposed on the rear side of the blade housing and a spin housing coupled to the connector. The razor assembly may further include a fixing housing coupled to the spin housing and configured to render the spin housing to be rotatable about a first rotational axis perpendicular to the longitudinal direction. The razor assembly may further include a first restoring force-providing unit configured to provide a restoring force for restoring the spin housing to a first rest position when the spin housing is rotated about the first rotational axis relative to the fixing housing.