Electric Dry Shaver Head with Dynamic Height Adjustment
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Solution Overview
Problem
Existing dry shavers have limited adaptability to the skin contour due to restricted pivoting range and lack of automatic adjustment of shaving elements, which affects optimal contact and shaving performance.
Innovation Solution
The solution enhances the dry shaver's adaptability by incorporating a twisting mechanism for the shaving systems within the shaving head housing, allowing additional displacement of tangents beyond the pivoting angle, and using actuating means like pivotable levers to control the height positions of shaving systems, ensuring optimal contact and adjustable stroke paths.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the shaving head housing is made pivotable to adapt to skin contours, then adaptability to skin surface is improved, but the maximum pivoting range is limited by the drive connection
Solution Approach 1:
The shaving system is divided into two independent shaving systems (first and second shaving systems) within the shaving head housing. Each shaving system can be independently adjusted in height, allowing them to accommodate different skin contours and pivot angles separately, thus overcoming the limitation of a single fixed pivot range
Solution Approach 2:
The shaving systems are made dynamically adjustable through actuating means that can change the height position of each shaving system. This dynamic adjustment capability allows the shaving head to adapt to varying skin contours and maintain optimal contact during pivoting motion, effectively expanding the usable pivoting range beyond fixed limitations
2Adaptability or versatility
If the shaving systems are fixed in position within the shaving head housing, then structural simplicity is maintained, but adaptability to varying skin contours is reduced
Solution Approach 1:
The shaving systems are transformed from fixed to dynamically adjustable positions within the shaving head housing. Actuating means are provided to move the shaving systems between different height positions, enabling adaptation to various skin contours while maintaining a relatively simple overall structure through modular design
Solution Approach 2:
The shaving systems are pre-adjusted to optimal positions for different skin contours before actual shaving operation. The actuating means allows preliminary positioning of the shaving systems according to the specific skin contour requirements, ensuring optimal contact is achieved before the shaving process begins
3Stress or pressure
If one shaving system is moved in the retracted position before the end pivot position is reached, then optimal contact pressure is improved, but the lifting movement capability is reduced
Solution Approach 1:
The first shaving system is moved to a retracted position in advance, before the shaving head housing reaches the end of its pivoting range. This preliminary retraction ensures that when pivoting occurs, the first shaving system maintains optimal contact pressure with the skin without requiring the full lifting movement, thus balancing contact pressure optimization with maintained movement capability
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
This design allows for improved contact with the skin, enhanced adaptability to varying skin contours, and increased control over shaving, particularly in contour cutting, while maintaining ease of maintenance by allowing the removable frame to accommodate worn components.
Implementation Method 1
the first shaving system, viewed in the pivoting direction, is at least partially moved in the direction of the retracted position by the actuating means before the end position associated with this pivoting direction is reached
Data Source
Figure 1
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Figure 4~5
AI summary
The invention relates to an electric dry shaver comprising a housing (1) and a shaver head housing (5) connected thereto as to oscillate between two end positions. The shaver head housing (5) carries at least two shaver system (15, 16). At least one shaver system (15, 16) is elastically pretensioned, can be retracted depending on the contact pressure applied by the user, and is received between a position in which it is extended from the shaver head housing and a retracted position. Actuating means (21, 22, 26, 27, 29, 30) in the shaver head housing (5) control, depending on the pivoting angle between the housing (1) and the shaver head housing (5), the height level in the range between the extracted and the retracted position of at least the shaver system (15, 16) that is retractably received between the extracted and the retracted position.