Electric Shaver Head with Dual Swing Axes and Float Mechanism
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Solution Overview
Problem
Existing electric shavers inadequately absorb forces exerted on the skin during shaving, leading to skin irritation due to insufficient head movement with skin undulations.
Innovation Solution
An electric shaver design featuring a head that is swingable about two axes, with a head float part allowing vertical movement and elastic materials to reduce force on the skin, and blade blocks that sink according to skin undulations, minimizing skin contact and irritation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the head is made swingable about two axes to follow skin undulations, then the follow-up performance with skin undulations is improved, but the force exerted on the skin increases causing skin irritation
Solution Approach 1:
The head supporting part is designed with two swing axes (first swing axis extending in longitudinal direction, second swing axis extending in transverse direction) that allow the head to dynamically adjust its position and angle in response to skin undulations. This dynamic capability enables the head to follow the contours of the skin surface while maintaining optimal contact, thereby improving adaptability without causing excessive force concentration that would lead to irritation.
2Productivity
If the head is pressed against the skin to maintain contact, then the shaving effectiveness is improved, but the force exerted on the skin causes skin to enter the outer blade leading to strong irritation
Solution Approach 1:
The head supporting part with dual swing axes enables the head to dynamically adjust its contact pressure and distribution on the skin surface. Instead of rigid pressing, the head can pivot and adapt to skin contours, maintaining effective shaving contact while distributing force to prevent skin from being pushed into the outer blade, thereby reducing irritation.
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
Enhances follow-up performance with skin undulations, reduces skin irritation, and improves operability by adjusting head angle and movement to minimize force on the skin, while maintaining efficient power delivery through linearly routed lead wires.
Implementation Method 1
At least one elastic material exerts a force on the head to lift up the head off the body
Data Source
Figure 1
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AI summary
Electric shaver (1) includes body (10), head (20) having blade block (30), and head supporting part (50) connecting body (10) with head (20). Head supporting part (50) includes swing supporting part (60) supporting head (20) swingably about two swing axes, and head float part (70) so that head (20) is movable up and down with respect to body (10). This configuration allows head (20) to swing about the two axes, and thus head (20) easily follows undulations of skin. Head (20) is movable up and down with respect to body (10), and thus head (20) sinks with respect to body (10) when head (20) is strongly pressed against the skin. The aspect provides electric shaver (1) that has a high follow-up performance of head (20) swinging according to undulations of skin and hardly irritates the skin strongly.