Shaving Head Pivot Axis Offset and Spring Torque
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing shaving apparatuses have a pivot axis located between the short-hair and long-hair cutting devices, leading to inefficient pivoting and discomfort during shaving due to the need for external mounting components at the free end of the shaving head, resulting in slow and incomplete cutting.
Innovation Solution
The pivot axis is arranged offset towards the base part, with spring means such as a wire spring loading the shaving head to enhance pivoting torque and eliminate the need for external mounting at the free end, ensuring rapid and reliable operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the pivot axis is arranged between the short-hair cutting device and the long-hair cutting device, then the shaving head can be mounted pivotably, but external mounting components are required at the free end which cause discomfort and hinder shaving operation
Solution Approach 1:
The pivot axis is relocated from the conventional position between the cutting devices to a position offset towards the base part in the depth direction. This dimensional repositioning allows the mounting structure to be integrated within the existing shaving head components rather than requiring external attachments at the free end, eliminating the discomfort caused by protruding mounting elements
2Productivity
If the pivot axis is arranged between the cutting devices, then the structure is simplified, but the pivoting action becomes slow and incomplete due to insufficient torque from friction forces alone
Solution Approach 1:
Spring means are pre-loaded to store elastic potential energy that is released during the pivoting motion. This preliminary energy storage and subsequent release provides the additional torque needed to achieve rapid and complete pivoting of the shaving head, overcoming the insufficiency of friction forces alone
Solution Approach 2:
The friction forces between the skin and cutting devices, which were previously insufficient to provide adequate pivoting torque, are augmented by the spring means. The spring converts its stored elastic energy into mechanical work that enhances the friction-driven pivoting action, transforming the previously harmful limitation into a beneficial combined driving mechanism
3Productivity
If the pivot axis is offset towards the base part, then rapid and reliable pivoting is achieved, but the mounting structure becomes more complex
Solution Approach 1:
The mounting structure is merged with the existing shaving head components by integrating the pivot axis offset towards the base part and incorporating the spring means into the same structural assembly. This consolidation achieves rapid pivoting while avoiding the addition of separate external mounting components, thus reducing overall structural complexity
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 a more comfortable and effective shaving experience by ensuring reliable contact of cutting elements with the skin and rapid pivoting of the shaving head, improving both cutting efficiency and user comfort.
Implementation Method 1
spring means are provided which spring-load the shaving head essentially counter to the depth direction away from the base part
Implementation Method 2
the friction forces exerted by the skin during operation of the shaving apparatus on the short-hair cutting device and on the toothed cutting device
Data Source
AI summary
A shaving apparatus includes a base part and a shaving head mounted on the base part. The shaving head is pivotably mounted with respect to the base part about a pivot axis that runs parallel to a longitudinal direction of rows of cutting. The pivot axis is offset towards the base part with respect to the rows of cutting teeth in a depth direction relative to the base part. A spring is provided which spring-loads the shaving head counter to the depth direction away from the base part and towards a rest position of the shaving head.