Pivotable Trimmer and Cutter Head for Skin Contour Adaptation
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Solution Overview
Problem
Existing hair removal devices, such as electric shavers, face difficulties in cutting longer hair fibers due to their design, which often results in incomplete hair removal on uneven skin surfaces, as the hair fibers bend or curl, preventing them from entering the cutting mesh, and the simultaneous operation of short hair cutters and trimmers can lead to inadequate skin contact on convex or concave contours.
Innovation Solution
The hair removal device features a working head with pivotable trimmers and short hair cutters, allowing them to adjust their orientation relative to each other about a pivot axis parallel to the skin surface, enabling better contact and adaptation to complex skin contours, ensuring both cutters and trimmers can effectively engage the skin regardless of its shape, with varying pressure distribution for efficient hair removal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If trimmers and short hair cutters are positioned to operate simultaneously on the skin surface, then long hair and short hair can be cut at the same time, but on convex or concave skin contours, inadequate skin contact occurs reducing cutting effectiveness
Solution Approach 1:
The trimmer and short hair cutter are designed with independent pivotable movements relative to the handle, allowing each cutting element to dynamically adjust its position and orientation based on skin contour variations. This dynamic adaptation ensures continuous effective skin contact while maintaining simultaneous operation of both cutting elements.
Solution Approach 2:
The working head is segmented into separate trimmer and short hair cutter units, each with independent pivot mechanisms. This segmentation allows each component to adapt individually to skin contours rather than requiring the entire head to conform, improving contact reliability on uneven surfaces.
2Ease of operation
If the working head is designed with a fixed structure for stable operation, then manufacturing and operation are simplified, but adaptation to complex skin contours is reduced
Solution Approach 1:
The working head incorporates pivotable trimmer and short hair cutter elements that can dynamically adjust to skin contours while maintaining a relatively simple overall structure. The pivot mechanisms are designed to be self-adjusting rather than requiring complex control systems.
Solution Approach 2:
The trimmer and short hair cutter automatically adjust their positions through pivot movements in response to skin contour variations, without requiring external control or complex actuation systems. The design uses the natural movement and pressure applied during shaving to drive the adaptation.
3Device complexity
If uniform pressure is applied across the working head, then the structure is simplified, but effective hair removal on uneven surfaces is compromised
Solution Approach 1:
The pivotable trimmer and short hair cutter allow pressure to be dynamically redistributed across the working head based on skin contour. Areas with better skin contact naturally receive more pressure, while pivot movement adjusts contact on harder-to-reach areas, creating effective pressure distribution without complex control mechanisms.
Data Source
AI summary
A hair removal device, in particular an electric shaver, comprising a working head attached to a handle for moving the working head along a skin surface, said working head including at least a pair of short hair cutters and at least one trimmer neighboring at least one of said short hair cutters, wherein said short hair cutters and said trimmer are movable relative to said handle under a skin contact pressure.