Loop-Shaped Razor Spring for Compact Pivot and Ejection
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Solution Overview
Problem
Existing razor springs in personal care appliances face limitations in providing adequate pivot and ejection functionality due to their size, complexity, and susceptibility to fatigue and deformation, which can compromise safety and user experience.
Innovation Solution
A loop-shaped spring member is integrated into the razor assembly, allowing for long travel distances and reduced stress, enhancing both pivot and ejection mechanisms while minimizing volume and reducing fatigue.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If coil springs or straight springs are used for pivot and ejection functions, then the spring provides necessary mechanical force, but the spring occupies a lot of volume and cannot accommodate large deflections or long travel distances without exceeding yield stresses
Solution Approach 1:
The patent applies a loop-shaped spring configuration instead of traditional straight or coil springs. This curved geometry allows the spring to accommodate large deflections and long travel distances while distributing stress more evenly throughout the structure, preventing localized stress concentrations that would cause fatigue failure. The loop shape enables the spring to achieve necessary mechanical force within a compact volume.
2Adaptability or versatility
If separate springs are used for pivot movement and eject movement, then each spring can be optimized for its specific function, but the device complexity and component count increase
Solution Approach 1:
The patent employs a single loop-shaped spring that performs multiple functions: it provides pivot movement capability and eject movement capability. This multi-functional design eliminates the need for separate springs for each function, thereby reducing device complexity and component count while maintaining the ability to optimize for each specific function through appropriate mechanical configuration.
3Length of moving object
If traditional springs are used with short length, then the spring structure is simple, but the spring cannot allow large deflections or long travel distances without permanent deformation
Solution Approach 1:
The loop-shaped spring configuration allows for long travel distances by distributing the deformation across the curved geometry of the loop. This curvature enables the spring to achieve the necessary travel distance without concentrating stress at any single point, thereby preventing permanent deformation while maintaining structural strength.
4Adaptability or versatility
If multiple separate spring mechanisms are implemented for different razor functions, then each function can be independently optimized, but the overall device complexity and manufacturing cost increase
Solution Approach 1:
The single loop-shaped spring is designed to perform multiple functions including pivot movement and eject movement, reducing the total number of components that need to be manufactured and assembled. This multi-functional approach simplifies the manufacturing process while maintaining the functional capabilities of the razor device.
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 loop-shaped spring member provides reliable and durable pivot and ejection functions, ensuring a pleasant user experience and improved safety by preventing permanent deformation and fatigue.
Implementation Method 1
the spring member is mounted inside the movable member... the loop shaped spring member provides reliable and durable pivot and ejection functions... preventing permanent deformation and fatigue
Data Source
AI summary
The present invention describes a novel spring mechanism for a razor. In the razor, the spring member may be disposed in a movable member assembly, portions of which may be used for ejection or pivoting. The spring may be fully encompassed within the assembly and be placed within supporting structures therein. The spring is a loop-shaped element having overlapping end portions with free distal ends. Alternately, the spring member is tear drop shaped loop shape with distal ends that are spaced apart. The spring may be disposed within a first and/or second movable member such as an eject button or a pivot member. A retarding structure on the spring provides a retarding force which is based on the interaction of the retarding structure with a protrusion on an assembly portion to keep the spring orientation intact. The spring is desirably comprised of stainless steel and is a flat wire.