Electric Razor Head Support Floating Mechanism for Skin Irritation
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Solution Overview
Problem
Conventional electric razors can cause skin irritation due to continuous strong contact from blade blocks when all are pressed against the skin, as the force distribution leads to individual blade blocks not sinking relative to the head, resulting in prolonged and intense contact.
Innovation Solution
An electric razor design featuring a head with three or more blade blocks, each with an outer and inner blade, and a head support that applies a first urging force for floating the head, a second urging force for specific blade blocks, and a third urging force for all blade blocks, ensuring that blade blocks sink before the head, distributing pressure and reducing skin irritation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If all blade blocks are pressed against the skin continuously, then the force is distributed to each blade block, but the head sinks and blade blocks maintain initial height causing continuous strong contact that increases skin irritation
Solution Approach 1:
The patent implements a dynamic floating mechanism where the head can sink and rise relative to the body, and blade blocks can independently sink and rise relative to the head. This dynamic adjustment allows the system to adapt to skin contours while controlling contact pressure, preventing continuous strong contact that causes irritation.
Solution Approach 2:
The patent uses spring mechanisms with specific urging forces to control the floating and sinking behavior. By adjusting the urging forces of the head support spring and blade block springs, the system changes the contact parameters dynamically, ensuring blade blocks make contact only when needed while preventing excessive pressure that would cause irritation.
2Ease of operation
If the head support urging force is set larger, then operation comfort is improved when one blade block touches skin, but the head does not sink when all blade blocks touch skin causing continuous strong contact
Solution Approach 1:
The patent applies different urging forces to different components: the head support spring has a first urging force that is larger than the second urging force of individual blade block springs (when fewer than all blocks contact), but smaller than the third urging force (when all blocks contact). This local differentiation of force parameters allows comfortable operation while preventing excessive contact pressure.
Solution Approach 2:
The system dynamically adjusts head position relative to the body based on contact conditions. When all blade blocks contact the skin, the head sinks relative to the body, allowing continuous strong contact to be avoided. This dynamic response is controlled by the relationship between the first urging force and the total urging forces of all blade blocks.
3Force
If the head sinks when all blade blocks touch skin, then sudden force is absorbed, but blade blocks maintain initial height causing continuous strong contact
Solution Approach 1:
The patent segments the floating mechanism into two independent levels: head floating relative to body (controlled by head support spring) and blade block floating relative to head (controlled by blade block springs). This segmentation allows the head to sink for force absorption while blade blocks can independently adjust their contact pressure, preventing continuous strong contact that causes irritation.
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 design effectively suppresses skin irritation by ensuring blade blocks sink before the head, reducing continuous strong contact and allowing for more even pressure distribution, thereby minimizing irritation.
Implementation Method 1
a head support that urges the head in a floating direction with a first urging force
Implementation Method 2
a blade float that allows each of the three or more blade blocks to float and sink with respect to the case
Data Source
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AI summary
The present disclosure provides an electric razor that can further suppress irritation to a skin. An electric razor 100 of the present disclosure includes a body 10 configured to be gripped by a user, a head 20 having three or more blade blocks 30, and a head support 50 connecting the head and the body to each other. The head support supports the head in a floatable-and-sinkable way with respect to the body. The head includes a case 21 that supports the three or more blade blocks, and a blade float 40 that allows each of the three or more blade blocks to float and sink with respect to the case. A first urging force with which the head support urges the head in a floating direction is larger than a second urging force with which the blade float urges the plurality of blade blocks which are one or more less than the three or more blade blocks in a floating direction. The first urging force is smaller than a third urging force with which the blade float urges all of the three or more blade blocks in the floating direction.