Hair Clipper Blade Suspension Linkage for Skin Safety
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing hair clippers risk nicking the skin due to excessive force or improper angle application, leading to potential injury during hair removal.
Innovation Solution
A powered hair clipper with a blade assembly that includes a linkage system allowing the blade to retract into the housing when a preselected threshold of force is applied, reducing skin contact and minimizing the risk of injury.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the blade is kept fully extended for efficient hair removal, then productivity is improved, but the risk of skin nicking increases due to excessive force or improper angle application
Solution Approach 1:
The blade assembly transitions from a static fully extended position to a dynamic system where the blade can automatically retract when excessive force is applied. The linkage mechanism allows the blade to move between extended (for efficient cutting) and retracted (for safety) positions based on real-time force conditions, resolving the contradiction between productivity and safety
2Manufacturing precision
If a rigid blade assembly is used for stable cutting, then manufacturing precision is improved, but the device cannot adapt to varying user force and angle conditions
Solution Approach 1:
The blade assembly incorporates a linkage mechanism that provides controlled movement between fixed positions. This dynamic design allows the blade to maintain precise positioning during normal operation while automatically adjusting (retracting) when excessive force is applied, combining manufacturing precision with adaptability to varying user conditions
3Productivity
If the blade maintains constant contact with the skin for continuous cutting, then productivity is improved, but harmful effects increase due to excessive force application
Solution Approach 1:
The linkage mechanism acts as a passive feedback system that automatically detects when excessive force is applied through the mechanical interaction between the blade, housing, and linkage. When the applied force exceeds the design threshold, the linkage triggers automatic blade retraction, providing real-time feedback-based safety without requiring active sensors or control systems
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 blade retraction mechanism effectively reduces the risk of skin nicking by automatically adjusting the blade position based on applied force and angle, enhancing user safety during hair removal operations.
Implementation Method 1
a linkage that is connected to the blade and biases the blade toward a fully extended configuration. Wherein, upon application of a force against the blade during use that is above a preselected threshold, the blade assembly includes a retracted configuration wherein the blade retracts into the blade housing using the linkage
Data Source
Figure 1
Figure 2~3
Figure 4
AI summary
A hair clipper includes a clipper body comprising a motor and a blade assembly connected to the clipper body such that the motor moves a blade of the blade assembly during operation. The blade assembly comprising a blade housing and the blade that extends outwardly from an opening in the housing and a linkage that is connected to the blade and biases the blade toward a fully extended configuration. Wherein, upon application of a force against the blade during use that is above a preselected threshold, the blade assembly includes a retracted configuration wherein the blade retracts into the blade housing using the linkage.