Razor Head Coupling With Elastic Return and Rotation Stops
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Solution Overview
Problem
Existing shaver designs often lead to discomfort and inefficiency due to suboptimal ergonomics, causing fatigue and safety concerns when shaving hard-to-reach areas, as the shaver head may lose contact with the skin and require uncomfortable maneuvers to reestablish contact.
Innovation Solution
A coupling mechanism featuring a first and second component that rotate relative to each other about a rotational axis, with a resilient protrusion that bends elastically to facilitate rotation and return to a neutral position, incorporating rotational and axial limits to maintain alignment and control movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a repositionable or flexibly coupled shaver head is introduced to provide motion around the handle axis, then the contact between shaver head and skin is improved, but the device complexity increases leading to increased costs and undesirable geometric constraints
Solution Approach 1:
The patent employs a flexible coupling mechanism between the handle and shaver head that allows controlled motion without complex articulated joints. The flexibility is achieved through elastic deformation of the coupling structure itself, enabling the shaver head to adapt to skin contours while maintaining a simple overall device architecture.
Solution Approach 2:
The coupling mechanism changes its structural parameters dynamically during use - specifically, it allows rotation and angular displacement of the shaver head relative to the handle within controlled limits. This parameter change enables the head to maintain skin contact during shaving motions while the simple coupling structure prevents excessive complexity.
2Adaptability or versatility
If mechanisms are introduced to provide repositionable head relative to handle, then motion around shaver handle axis is improved, but geometric constraints become undesirable
Solution Approach 1:
The coupling mechanism transitions from a static rigid connection to a dynamic flexible connection that permits controlled rotation and angular movement. This dynamic capability allows the shaver head to adapt its orientation relative to the handle axis while the coupling structure itself remains geometrically simple, avoiding complex mechanical constraints.
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 solution allows for smooth, controlled rotation of the shaver head relative to the handle, maintaining contact with the skin and reducing user fatigue while ensuring safety and ease of use, without increasing complexity or costs.
Implementation Method 1
The recess is configured to bend the protrusion received in the recess elastically in response to a force applied during shaving thereby rotating one of the first component and the second component about the rotational axis relative to the other
Implementation Method 2
The protrusion is configured to bias the first or second components back towards a neutral position once the force applied is stopped
Data Source
Figure 1~3
Figure 4A~4C
Figure 5A~5B
AI summary
Coupling (300) for a razor, comprising a first component (100), a second component (200) rotatable relative thereto about a rotational axis (400) extending therebetween, and a rotation limit (600), a male part (620) thereof extending along the rotational axis into a female part (610) thereof. The male and female parts are shaped to define one or more rotational stops to the rotation of one of the first and second components about the rotational axis relative to the other. A resilient protrusion (320) of the second component, receivable in a recess (310) of the first component, bends elastically in response to a force applied during shaving that rotates the one component about the rotational axis relative to the other component, and biases them towards a neutral position once the force is stopped. Fabrication of the coupling. Razor and handle comprising the coupling.