Rotary Shaver Head Structure Central Coupling Overload Release
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing shaving devices are prone to damage when subjected to overloading forces, such as accidental falls, due to the head structure being supported at its outer circumference, which limits the release of the coupling element and increases the risk of damage to the shaving head or head structure.
Innovation Solution
A shaving device design featuring a coupling element in the central area of the head structure and a retaining structure in the base structure that allows the head structure to be solely supported by the coupling element, preventing external loads from being transferred through the outer circumference, thereby releasing the coupling element and preventing damage when an overload is applied.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the head structure is supported at its outer circumference by the base structure, then the head structure is stable during normal use, but the coupling element cannot release under overload forces, resulting in damage to the shaving head or head structure
Solution Approach 1:
The support function is extracted from the outer circumference area and concentrated solely to the central coupling element. The base structure is designed to be free of support elements in the outer circumference area, so that the head structure is not supported there and substantially only retained by the coupling element in the central area.
Solution Approach 2:
The coupling element is designed with a release mechanism that activates preliminarily under overload conditions. The retaining structure is configured to allow automatic release when excessive force is applied, preventing damage before it occurs.
2Reliability
If the coupling element is arranged in the central area and the base structure is free of support elements at the outer circumference, then the coupling element can release under overload to prevent damage, but the head structure may be less stable during normal operation
Solution Approach 1:
The retaining structure provides localized support precisely where needed - at the central coupling element - while leaving the outer circumference area free of support elements. This creates different functional zones: a stable central retention point and a free outer area that allows overload release.
3Reliability
If the head structure is solely retained by the coupling element without support elements at the outer circumference, then overload forces can release the coupling element to prevent damage, but the force required to release the coupling element during normal use may be insufficient
Solution Approach 1:
The retaining structure is designed with dynamic characteristics that adapt to the applied load. It provides strong retention under normal operating forces but automatically transitions to a released state when excessive forces are applied, allowing the coupling element to disengage.
Data Source
AI summary
A shaving device comprises a head structure (2) and a base structure (4). The head structure (2) is configured to retain and support at least one shaving head (30A, 30B, 30C). The head structure (2) is releasably retainable on the base structure (4). The base structure (4) is free of support elements in an area of an outer circumference of the head structure (2) such that the head structure (2), when coupled to the base structure (4), is not supported in the area of its outer circumference. The head structure (2), when coupled to the base structure (4), is substantially only retained on the base structure (4) by a retaining force provided by a retaining structure of the base structure (4). When an overloading force is exerted on the head structure (2), the force is transferred to a coupling element (8) arranged in a central area (2A) of the head structure (2) such that the coupling element (8) is released from the retaining structure of the base structure (4) in order to prevent damage to the head structure (2).