Parallel-Motion Cutter Head Structure for Low-Friction Shaving
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Solution Overview
Problem
The stability and service life of a cutter head in shavers are affected due to heat generation during operation, which can lead to potential safety hazards and affects the temperature of the cutter head, causing instability and reducing its lifespan.
Innovation Solution
A cutter head structure with a movable cutter assembly in horizontal and transverse sliding fit with a fixed cutter assembly, utilizing rolling members, a pressing member, and a gasket with limiting portions to reduce friction and heat, allowing parallel movement and improved heat dissipation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the movable cutter assembly moves horizontally and transversely relative to the fixed cutter assembly during shaving operation, then the cutting effect is achieved, but friction and heat are generated between the two assemblies
Solution Approach 1:
The patent introduces rolling members (balls or rollers) as intermediary elements between the movable cutter assembly and fixed cutter assembly. These rolling members convert direct sliding friction into rolling friction, significantly reducing heat generation while maintaining the cutting function. The pressing member with elastic deformation groove applies controlled pressure to ensure proper contact and rolling action.
2Ease of operation
If the fixed cutter assembly and movable cutter assembly are in direct contact for cutting, then the cutting function is achieved, but the temperature of the cutter head rises affecting stability and service life
Solution Approach 1:
Rolling members are introduced as intermediary elements between the cutter assemblies, converting direct sliding contact into rolling contact. This reduces friction and heat generation, thereby improving the stability and service life of the cutter head while maintaining the cutting function.
Solution Approach 2:
The patent changes the friction parameter by introducing rolling members, transforming sliding friction into rolling friction. This parameter change reduces heat generation and improves the thermal stability of the cutter head, extending its service life.
3Temperature
If rolling members are added to reduce friction and heat, then heat generation is reduced, but the device complexity increases
Solution Approach 1:
The pressing member serves multiple functions: it applies pressure to the rolling members, provides structural support, and includes an elastic deformation groove that accommodates the rolling members while allowing for pressure adjustment. This multi-functionality reduces the need for additional separate components, thereby limiting the increase in device complexity.
Solution Approach 2:
The pressing member and the mounting structure are combined into a single integrated component. The elastic deformation groove is formed directly in the pressing member, eliminating the need for separate mounting brackets or housings. This merging of functions and components minimizes the increase in device 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
The solution effectively reduces friction and heat, prolongs the service life of the cutter assemblies, ensures stability and reliability, and enhances cutting safety and comfort by minimizing direct contact and providing a buffering layer.
Implementation Method 1
the movable cutter assembly is in horizontal and transverse sliding fit with the fixed cutter assembly; and the cutter head structure further comprises: a pressing member... and rolling members
Data Source
AI summary
Disclosed in the present disclosure is a cutter head structure capable of achieving parallel movement. The cutter head structure includes a movable cutter assembly, a fixed cutter assembly, rolling members, a pressing member, and a gasket, where the movable cutter assembly is sliding fit with the fixed cutter assembly; the pressing member is provided with a first mounting position and second mounting positions, at least part of the movable cutter assembly is disposed at the first mounting position, and at least part of each of the rolling members is disposed at the second mounting position; and the gasket is disposed on one side of the fixed cutter assembly close to the movable cutter assembly. According to the present disclosure, the contact area between a tail portion of the movable cutter assembly and a tail portion of the fixed cutter assembly can be reduced, thereby reducing friction between the two assemblies.